diff --git a/.github/configs b/.github/configs
index df82faf5046b..370fe29a3ee4 100755
--- a/.github/configs
+++ b/.github/configs
@@ -1,361 +1,372 @@
 #!/bin/sh
 #
 # usage: configs vmname test_config (or '' for default)
 #
 # Sets the following variables:
 # CONFIGFLAGS           options to ./configure
 # SSHD_CONFOPTS         sshd_config options
 # TEST_TARGET           make target used when testing.  defaults to "tests".
 # LTESTS
 
 config=$1
 if [ "$config" = "" ]; then
 	config="default"
 fi
 
 unset CC CFLAGS CPPFLAGS LDFLAGS LTESTS SUDO
 
 TEST_TARGET="tests compat-tests"
 LTESTS=""
 SKIP_LTESTS=""
 SUDO=sudo	# run with sudo by default
 TEST_SSH_UNSAFE_PERMISSIONS=1
 # Stop on first test failure to minimize logs
 TEST_SSH_FAIL_FATAL=yes
 
 CONFIGFLAGS=""
 LIBCRYPTOFLAGS=""
 
 case "$config" in
     default|sol64)
 	;;
     c89)
 	# If we don't have LLONG_MAX, configure will figure out that it can
 	# get it by setting -std=gnu99, at which point we won't be testing
 	# C89 any more.  To avoid this, feed it in via CFLAGS.
 	llong_max=`gcc -E -dM - </dev/null | \
 	    awk '$2=="__LONG_LONG_MAX__"{print $3}'`
 	CPPFLAGS="-DLLONG_MAX=${llong_max}"
 
 	CC="gcc"
 	CFLAGS="-Wall -std=c89 -pedantic -Werror=vla"
 	CONFIGFLAGS="--without-zlib"
 	LIBCRYPTOFLAGS="--without-openssl"
 	TEST_TARGET=t-exec
 	;;
     cygwin-release)
 	# See https://cygwin.com/git/?p=git/cygwin-packages/openssh.git;a=blob;f=openssh.cygport;hb=HEAD
 	CONFIGFLAGS="--with-xauth=/usr/bin/xauth --with-security-key-builtin"
 	CONFIGFLAGS="$CONFIGFLAGS --with-kerberos5=/usr --with-libedit --disable-strip"
 	;;
    clang-12-Werror)
 	CC="clang-12"
 	# clang's implicit-fallthrough requires that the code be annotated with
 	# __attribute__((fallthrough)) and does not understand /* FALLTHROUGH */
 	CFLAGS="-Wall -Wextra -O2 -Wno-error=implicit-fallthrough -Wno-error=unused-parameter"
 	CONFIGFLAGS="--with-pam --with-Werror"
 	;;
     *-sanitize-*)
 	case "$config" in
 	gcc-*)
 		CC=gcc
 		;;
 	clang-*)
 		# Find the newest available version of clang
 		for i in `seq 10 99`; do
 		    clang="`which clang-$i 2>/dev/null`"
 		    [ -x "$clang" ] && CC="$clang"
 		done
 		;;
 	esac
 	# Put Sanitizer logs in regress dir.
 	SANLOGS=`pwd`/regress
 	# - We replace chroot with chdir so that the sanitizer in the preauth
 	#   privsep process can read /proc.
 	# - clang does not recognizes explicit_bzero so we use bzero
 	#   (see https://github.com/google/sanitizers/issues/1507
 	# - openssl and zlib trip ASAN.
 	# - sp_pwdp returned by getspnam trips ASAN, hence disabling shadow.
 	case "$config" in
 	*-sanitize-address)
 	    CFLAGS="-fsanitize=address -fno-omit-frame-pointer"
 	    LDFLAGS="-fsanitize=address"
 	    CPPFLAGS='-Dchroot=chdir -Dexplicit_bzero=bzero -D_FORTIFY_SOURCE=0 -DASAN_OPTIONS=\"detect_leaks=0:log_path='$SANLOGS'/asan.log\"'
 	    CONFIGFLAGS=""
 	    TEST_TARGET="t-exec"
 	    ;;
 	clang-sanitize-memory)
 	    CFLAGS="-fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer"
 	    LDFLAGS="-fsanitize=memory"
 	    CPPFLAGS='-Dchroot=chdir -Dexplicit_bzero=bzero -DMSAN_OPTIONS=\"log_path='$SANLOGS'/msan.log\"'
 	    CONFIGFLAGS="--without-zlib --without-shadow"
 	    LIBCRYPTOFLAGS="--without-openssl"
 	    TEST_TARGET="t-exec"
 	    ;;
 	*-sanitize-undefined)
 	    CFLAGS="-fsanitize=undefined"
 	    LDFLAGS="-fsanitize=undefined"
 	    ;;
 	*)
 	     echo unknown sanitize option;
 	     exit 1;;
 	esac
 	features="--disable-security-key --disable-pkcs11"
 	hardening="--without-sandbox --without-hardening --without-stackprotect"
 	privsep="--with-privsep-user=root"
 	CONFIGFLAGS="$CONFIGFLAGS $features $hardening $privsep"
 	# Because we hobble chroot we can't test it.
 	SKIP_LTESTS=sftp-chroot
 	;;
     gcc-11-Werror)
 	CC="gcc-11"
 	# -Wnoformat-truncation in gcc 7.3.1 20180130 fails on fmt_scaled
 	# -Wunused-result ignores (void) so is not useful.  See
 	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
 	CFLAGS="-O2 -Wno-format-truncation -Wimplicit-fallthrough=4 -Wno-unused-parameter -Wno-unused-result"
 	CONFIGFLAGS="--with-pam --with-Werror"
 	;;
     gcc-12-Werror)
 	CC="gcc-12"
 	# -Wnoformat-truncation in gcc 7.3.1 20180130 fails on fmt_scaled
 	# -Wunused-result ignores (void) so is not useful.  See
 	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
 	CFLAGS="-O2 -Wno-format-truncation -Wimplicit-fallthrough=4 -Wno-unused-parameter -Wno-unused-result"
 	CONFIGFLAGS="--with-pam --with-Werror"
 	;;
     clang*|gcc*)
 	CC="$config"
 	;;
     kitchensink)
 	CONFIGFLAGS="--with-kerberos5 --with-libedit --with-pam"
 	CONFIGFLAGS="${CONFIGFLAGS} --with-security-key-builtin --with-selinux"
 	CFLAGS="-DSK_DEBUG -DSANDBOX_SECCOMP_FILTER_DEBUG"
 	;;
     hardenedmalloc)
 	CONFIGFLAGS="--with-ldflags=-lhardened_malloc"
 	;;
     tcmalloc)
 	CONFIGFLAGS="--with-ldflags=-ltcmalloc"
 	;;
     krb5|heimdal)
 	CONFIGFLAGS="--with-kerberos5"
 	;;
     libedit)
 	CONFIGFLAGS="--with-libedit"
 	;;
     musl)
 	CC="musl-gcc"
 	CONFIGFLAGS="--without-zlib"
 	LIBCRYPTOFLAGS="--without-openssl"
 	TEST_TARGET="t-exec"
 	;;
     pam-krb5)
 	CONFIGFLAGS="--with-pam --with-kerberos5"
 	SSHD_CONFOPTS="UsePam yes"
 	;;
     *pam)
 	CONFIGFLAGS="--with-pam"
 	SSHD_CONFOPTS="UsePam yes"
 	;;
     boringssl)
 	CONFIGFLAGS="--disable-pkcs11"
 	LIBCRYPTOFLAGS="--with-ssl-dir=/opt/boringssl --with-rpath=-Wl,-rpath,"
 	;;
     libressl-*)
 	LIBCRYPTOFLAGS="--with-ssl-dir=/opt/libressl --with-rpath=-Wl,-rpath,"
 	;;
+    putty-*)
+	CONFIGFLAGS="--with-plink=/usr/local/bin/plink --with-puttygen=/usr/local/bin/puttygen"
+	# We don't need to rerun the regular tests, just the interop ones.
+	TEST_TARGET=interop-tests
+	;;
     openssl-*)
 	LIBCRYPTOFLAGS="--with-ssl-dir=/opt/openssl --with-rpath=-Wl,-rpath,"
 	# OpenSSL 1.1.1 specifically has a bug in its RNG that breaks reexec
 	# fallback.  See https://bugzilla.mindrot.org/show_bug.cgi?id=3483
 	if [ "$config" = "openssl-1.1.1" ]; then
 		SKIP_LTESTS="reexec"
 	fi
 	;;
     selinux)
 	CONFIGFLAGS="--with-selinux"
 	;;
     sk)
 	CONFIGFLAGS="--with-security-key-builtin"
         ;;
     without-openssl)
 	LIBCRYPTOFLAGS="--without-openssl"
 	TEST_TARGET=t-exec
 	;;
     valgrind-[1-5]|valgrind-unit)
 	# rlimit sandbox and FORTIFY_SOURCE confuse Valgrind.
 	CONFIGFLAGS="--without-sandbox --without-hardening"
 	CONFIGFLAGS="$CONFIGFLAGS --with-cppflags=-D_FORTIFY_SOURCE=0"
 	TEST_TARGET="t-exec USE_VALGRIND=1"
 	TEST_SSH_ELAPSED_TIMES=1
 	export TEST_SSH_ELAPSED_TIMES
 	# Valgrind slows things down enough that the agent timeout test
 	# won't reliably pass, and the unit tests run longer than allowed
 	# by github so split into separate tests.
 	tests2="integrity try-ciphers"
 	tests3="krl forward-control sshsig agent-restrict kextype sftp"
 	tests4="cert-userkey cert-hostkey kextype sftp-perm keygen-comment percent"
 	tests5="rekey"
 	case "$config" in
 	    valgrind-1)
 		# All tests except agent-timeout (which is flaky under valgrind),
 		# connection-timeout (which doesn't work since it's so slow)
 		# and hostbased (since valgrind won't let ssh exec keysign).
 		# Slow ones are run separately to increase parallelism.
 		SKIP_LTESTS="agent-timeout connection-timeout hostbased"
 		SKIP_LTESTS="$SKIP_LTESTS ${tests2} ${tests3} ${tests4} ${tests5}"
 		;;
 	    valgrind-2)
 		LTESTS="${tests2}"
 		;;
 	    valgrind-3)
 		LTESTS="${tests3}"
 		;;
 	    valgrind-4)
 		LTESTS="${tests4}"
 		;;
 	    valgrind-5)
 		LTESTS="${tests5}"
 		;;
 	    valgrind-unit)
 		TEST_TARGET="unit USE_VALGRIND=1"
 		;;
 	esac
 	;;
     zlib-develop)
 	INSTALL_ZLIB=develop
 	CONFIGFLAGS="--with-zlib=/opt/zlib --with-rpath=-Wl,-rpath,"
 	;;
     *)
 	echo "Unknown configuration $config"
 	exit 1
 	;;
 esac
 
 # The Solaris 64bit targets are special since they need a non-flag arg.
 case "$config" in
     sol64*)
 	CONFIGFLAGS="--target=x86_64 --with-cflags=-m64 --with-ldflags=-m64 ${CONFIGFLAGS}"
 	LIBCRYPTOFLAGS="--with-ssl-dir=/usr/local/ssl64 --with-rpath=-Wl,-rpath,"
 	;;
 esac
 
 case "${TARGET_HOST}" in
     aix*)
 	CONFIGFLAGS="--disable-security-key"
 	LIBCRYPTOFLAGS="--without-openssl"
 	# These are slow real or virtual machines so skip the slowest tests
 	# (which tend to be thw ones that transfer lots of data) so that the
 	# test run does not time out.
 	# The agent-restrict test fails due to some quoting issue when run
 	# with sh or ksh so specify bash for now.
 	TEST_TARGET="t-exec unit TEST_SHELL=bash"
 	SKIP_LTESTS="rekey sftp"
 	;;
     debian-riscv64)
 	# This machine is fairly slow, so skip the unit tests.
 	TEST_TARGET="t-exec"
 	;;
     dfly58*|dfly60*)
 	# scp 3-way connection hangs on these so skip until sorted.
 	SKIP_LTESTS=scp3
 	;;
     fbsd6)
 	# Native linker is not great with PIC so OpenSSL is built w/out.
 	CONFIGFLAGS="${CONFIGFLAGS} --disable-security-key"
 	;;
     hurd)
 	SKIP_LTESTS="forwarding multiplex proxy-connect hostkey-agent agent-ptrace"
 	;;
     minix3)
 	CONFIGFLAGS="${CONFIGFLAGS} --disable-security-key"
+	# Unix domain sockets don't work quite like we expect, so also
+	# disable FD passing (and thus multiplexing).
+	CONFIGFLAGS="${CONFIGFLAGS} --disable-fd-passing"
 	LIBCRYPTOFLAGS="--without-openssl"
+
 	# Minix does not have a loopback interface so we have to skip any
 	# test that relies on one.
 	# Also, Minix seems to be very limited in the number of select()
 	# calls that can be operating concurrently, so prune additional tests for that.
 	T="addrmatch agent-restrict brokenkeys cfgmatch cfgmatchlisten cfgparse
-	    connect connect-uri exit-status forwarding hostkey-agent
-	    key-options keyscan knownhosts-command login-timeout
+	    connect connect-uri dynamic-forward exit-status forwarding
+	    forward-control
+	    hostkey-agent key-options keyscan knownhosts-command login-timeout
 	    reconfigure reexec rekey scp scp-uri scp3 sftp sftp-badcmds
 	    sftp-batch sftp-cmds sftp-glob sftp-perm sftp-uri stderr-data
 	    transfer"
-	# Unix domain sockets don't work quite like we expect, so also skip any tests
-	# that use multiplexing.
-	T="$T connection-timeout dynamic-forward forward-control multiplex"
 	SKIP_LTESTS="$(echo $T)"
 	TEST_TARGET=t-exec
 	SUDO=""
 	;;
     nbsd4)
 	# System compiler will ICE on some files with fstack-protector
 	# SHA256 functions in sha2.h conflict with OpenSSL's breaking sk-dummy
 	CONFIGFLAGS="${CONFIGFLAGS} --without-hardening --disable-security-key"
 	;;
     openwrt-*)
 	CONFIGFLAGS="${CONFIGFLAGS} --without-zlib"
 	LIBCRYPTOFLAGS="--without-openssl"
 	TEST_TARGET="t-exec"
 	;;
     sol10|sol11)
 	# sol10 VM is 32bit and the unit tests are slow.
 	# sol11 has 4 test configs so skip unit tests to speed up.
 	TEST_TARGET="tests SKIP_UNIT=1"
 	;;
     win10)
 	# No sudo on Windows.
 	SUDO=""
 	;;
 esac
 
 host=`./config.guess`
 case "$host" in
 *cygwin)
 	SUDO=""
 	# Don't run compat tests on cygwin as they don't currently compile.
 	TEST_TARGET="tests"
 	;;
 *-darwin*)
 	# Unless specified otherwise, build without OpenSSL on Mac OS since
 	# modern versions don't ship with libcrypto.
 	LIBCRYPTOFLAGS="--without-openssl"
 	TEST_TARGET=t-exec
+
+	# On some OS X runners we can't write to /var/empty.
+	CONFIGFLAGS="${CONFIGFLAGS} --with-privsep-path=/usr/local/empty"
+
 	case "$host" in
 	*-darwin22.*)
 		# sudo -S nobody doesn't work on macos 13 for some reason.
 		SKIP_LTESTS="agent-getpeereid" ;;
 	esac
 	;;
 esac
 
 # Unless specifically configured, search for a suitable version of OpenSSL,
 # otherwise build without it.
 if [ -z "${LIBCRYPTOFLAGS}" ]; then
 	LIBCRYPTOFLAGS="--without-openssl"
 	# last-match
 	for i in /usr /usr/local /usr/local/ssl /usr/local/opt/openssl; do
 		ver="none"
 		if [ -x ${i}/bin/openssl ]; then
 			ver="$(${i}/bin/openssl version)"
 		fi
 		case "$ver" in
 			none) ;;
 			"OpenSSL 0."*|"OpenSSL 1.0."*|"OpenSSL 1.1.0"*) ;;
 			"LibreSSL 2."*|"LibreSSL 3.0."*) ;;
 			*) LIBCRYPTOFLAGS="--with-ssl-dir=${i}" ;;
 		esac
 	done
 	if [ "${LIBCRYPTOFLAGS}" = "--without-openssl" ]; then
 		TEST_TARGET="t-exec"
 	fi
 fi
 
 CONFIGFLAGS="${CONFIGFLAGS} ${LIBCRYPTOFLAGS}"
 
 if [ -x "$(which plink 2>/dev/null)" ]; then
 	REGRESS_INTEROP_PUTTY=yes
 	export REGRESS_INTEROP_PUTTY
 fi
 
 export CC CFLAGS CPPFLAGS LDFLAGS LTESTS SUDO
 export TEST_TARGET TEST_SSH_UNSAFE_PERMISSIONS TEST_SSH_FAIL_FATAL
diff --git a/.github/setup_ci.sh b/.github/setup_ci.sh
index d0ba7b4724e9..f0f2761c7107 100755
--- a/.github/setup_ci.sh
+++ b/.github/setup_ci.sh
@@ -1,243 +1,269 @@
 #!/bin/sh
 
 PACKAGES=""
 
  . .github/configs $@
 
 host=`./config.guess`
 echo "config.guess: $host"
 case "$host" in
 *cygwin)
 	PACKAGER=setup
 	echo Setting CYGWIN system environment variable.
 	setx CYGWIN "binmode"
 	echo Removing extended ACLs so umask works as expected.
 	setfacl -b . regress
 	PACKAGES="$PACKAGES,autoconf,automake,cygwin-devel,gcc-core"
 	PACKAGES="$PACKAGES,make,openssl-devel,zlib-devel"
 	;;
 *-darwin*)
 	PACKAGER=brew
 	PACKAGES="automake"
 	;;
 *)
 	PACKAGER=apt
 esac
 
 TARGETS=$@
 
 INSTALL_FIDO_PPA="no"
 export DEBIAN_FRONTEND=noninteractive
 
 set -e
 
 if [ -x "`which lsb_release 2>&1`" ]; then
 	lsb_release -a
 fi
 
 if [ ! -z "$SUDO" ]; then
 	# Ubuntu 22.04 defaults to private home dirs which prevent the
 	# agent-getpeerid test from running ssh-add as nobody.  See
 	# https://github.com/actions/runner-images/issues/6106
 	if ! "$SUDO" -u nobody test -x ~; then
 		echo ~ is not executable by nobody, adding perms.
 		chmod go+x ~
 	fi
 	# Some of the Mac OS X runners don't have a nopasswd sudo rule. Regular
 	# sudo still works, but sudo -u doesn't.  Restore the sudo rule.
 	if ! "$SUDO" grep  -E 'runner.*NOPASSWD' /etc/passwd >/dev/null; then
 		echo "Restoring runner nopasswd rule to sudoers."
 		echo 'runner ALL=(ALL) NOPASSWD: ALL' |$SUDO tee -a /etc/sudoers
 	fi
 	if ! "$SUDO" -u nobody -S test -x ~ </dev/null; then
 		echo "Still can't sudo to nobody."
 		exit 1
 	fi
 fi
 
 if [ "${TARGETS}" = "kitchensink" ]; then
 	TARGETS="krb5 libedit pam sk selinux"
 fi
 
 for flag in $CONFIGFLAGS; do
     case "$flag" in
     --with-pam)		TARGETS="${TARGETS} pam" ;;
     --with-libedit)	TARGETS="${TARGETS} libedit" ;;
     esac
 done
 
 echo "Setting up for '$TARGETS'"
 for TARGET in $TARGETS; do
     case $TARGET in
     default|without-openssl|without-zlib|c89)
         # nothing to do
         ;;
     clang-sanitize*)
         PACKAGES="$PACKAGES clang-12"
         ;;
     cygwin-release)
         PACKAGES="$PACKAGES libcrypt-devel libfido2-devel libkrb5-devel"
         ;;
     gcc-sanitize*)
         ;;
     clang-*|gcc-*)
         compiler=$(echo $TARGET | sed 's/-Werror//')
         PACKAGES="$PACKAGES $compiler"
         ;;
     krb5)
         PACKAGES="$PACKAGES libkrb5-dev"
 	;;
     heimdal)
         PACKAGES="$PACKAGES heimdal-dev"
         ;;
     libedit)
 	case "$PACKAGER" in
 	setup)	PACKAGES="$PACKAGES libedit-devel" ;;
 	apt)	PACKAGES="$PACKAGES libedit-dev" ;;
 	esac
         ;;
     *pam)
 	case "$PACKAGER" in
 	apt)	PACKAGES="$PACKAGES libpam0g-dev" ;;
 	esac
         ;;
     sk)
         INSTALL_FIDO_PPA="yes"
         PACKAGES="$PACKAGES libfido2-dev libu2f-host-dev libcbor-dev"
         ;;
     selinux)
         PACKAGES="$PACKAGES libselinux1-dev selinux-policy-dev"
         ;;
     hardenedmalloc)
         INSTALL_HARDENED_MALLOC=yes
         ;;
     musl)
 	PACKAGES="$PACKAGES musl-tools"
 	;;
     tcmalloc)
         PACKAGES="$PACKAGES libgoogle-perftools-dev"
         ;;
     openssl-noec)
 	INSTALL_OPENSSL=OpenSSL_1_1_1k
 	SSLCONFOPTS="no-ec"
 	;;
     openssl-*)
         INSTALL_OPENSSL=$(echo ${TARGET} | cut -f2 -d-)
         case ${INSTALL_OPENSSL} in
           1.1.1_stable)	INSTALL_OPENSSL="OpenSSL_1_1_1-stable" ;;
           1.*)	INSTALL_OPENSSL="OpenSSL_$(echo ${INSTALL_OPENSSL} | tr . _)" ;;
           3.*)	INSTALL_OPENSSL="openssl-${INSTALL_OPENSSL}" ;;
         esac
         PACKAGES="${PACKAGES} putty-tools dropbear-bin"
        ;;
     libressl-*)
         INSTALL_LIBRESSL=$(echo ${TARGET} | cut -f2 -d-)
         case ${INSTALL_LIBRESSL} in
           master) ;;
           *) INSTALL_LIBRESSL="$(echo ${TARGET} | cut -f2 -d-)" ;;
         esac
         PACKAGES="${PACKAGES} putty-tools dropbear-bin"
        ;;
     boringssl)
         INSTALL_BORINGSSL=1
         PACKAGES="${PACKAGES} cmake ninja-build"
        ;;
+    putty-*)
+	INSTALL_PUTTY=$(echo "${TARGET}" | cut -f2 -d-)
+	PACKAGES="${PACKAGES} cmake"
+	;;
     valgrind*)
        PACKAGES="$PACKAGES valgrind"
        ;;
     zlib-*)
        ;;
     *) echo "Invalid option '${TARGET}'"
         exit 1
         ;;
     esac
 done
 
 if [ "yes" = "$INSTALL_FIDO_PPA" ]; then
     sudo apt update -qq
     sudo apt install -qy software-properties-common
     sudo apt-add-repository -y ppa:yubico/stable
 fi
 
 tries=3
 while [ ! -z "$PACKAGES" ] && [ "$tries" -gt "0" ]; do
     case "$PACKAGER" in
     apt)
 	sudo apt update -qq
 	if sudo apt install -qy $PACKAGES; then
 		PACKAGES=""
 	fi
 	;;
     brew)
 	if [ ! -z "PACKAGES" ]; then
 		if brew install $PACKAGES; then
 			PACKAGES=""
 		fi
 	fi
 	;;
     setup)
 	if /cygdrive/c/setup.exe -q -P `echo "$PACKAGES" | tr ' ' ,`; then
 		PACKAGES=""
 	fi
 	;;
     esac
     if [ ! -z "$PACKAGES" ]; then
 	sleep 90
     fi
     tries=$(($tries - 1))
 done
 if [ ! -z "$PACKAGES" ]; then
 	echo "Package installation failed."
 	exit 1
 fi
 
 if [ "${INSTALL_HARDENED_MALLOC}" = "yes" ]; then
     (cd ${HOME} &&
      git clone https://github.com/GrapheneOS/hardened_malloc.git &&
      cd ${HOME}/hardened_malloc &&
      make && sudo cp out/libhardened_malloc.so /usr/lib/)
 fi
 
 if [ ! -z "${INSTALL_OPENSSL}" ]; then
     (cd ${HOME} &&
      git clone https://github.com/openssl/openssl.git &&
      cd ${HOME}/openssl &&
      git checkout ${INSTALL_OPENSSL} &&
      ./config no-threads shared ${SSLCONFOPTS} \
          --prefix=/opt/openssl &&
      make && sudo make install_sw)
 fi
 
 if [ ! -z "${INSTALL_LIBRESSL}" ]; then
     if [ "${INSTALL_LIBRESSL}" = "master" ]; then
         (mkdir -p ${HOME}/libressl && cd ${HOME}/libressl &&
          git clone https://github.com/libressl-portable/portable.git &&
          cd ${HOME}/libressl/portable &&
          git checkout ${INSTALL_LIBRESSL} &&
          sh update.sh && sh autogen.sh &&
          ./configure --prefix=/opt/libressl &&
          make && sudo make install)
     else
         LIBRESSL_URLBASE=https://cdn.openbsd.org/pub/OpenBSD/LibreSSL
         (cd ${HOME} &&
          wget ${LIBRESSL_URLBASE}/libressl-${INSTALL_LIBRESSL}.tar.gz &&
          tar xfz libressl-${INSTALL_LIBRESSL}.tar.gz &&
          cd libressl-${INSTALL_LIBRESSL} &&
          ./configure --prefix=/opt/libressl && make && sudo make install)
     fi
 fi
 
 if [ ! -z "${INSTALL_BORINGSSL}" ]; then
     (cd ${HOME} && git clone https://boringssl.googlesource.com/boringssl &&
      cd ${HOME}/boringssl && mkdir build && cd build &&
      cmake -GNinja  -DCMAKE_POSITION_INDEPENDENT_CODE=ON .. && ninja &&
      mkdir -p /opt/boringssl/lib &&
      cp ${HOME}/boringssl/build/crypto/libcrypto.a /opt/boringssl/lib &&
      cp -r ${HOME}/boringssl/include /opt/boringssl)
 fi
 
 if [ ! -z "${INSTALL_ZLIB}" ]; then
     (cd ${HOME} && git clone https://github.com/madler/zlib.git &&
      cd ${HOME}/zlib && ./configure && make &&
      sudo make install prefix=/opt/zlib)
 fi
+
+if [ ! -z "${INSTALL_PUTTY}" ]; then
+    ver="${INSTALL_PUTTY}"
+    case "${INSTALL_PUTTY}" in
+    snapshot)
+	tarball=putty.tar.gz
+	(cd /tmp && wget https://tartarus.org/~simon/putty-snapshots/${tarball})
+	;;
+    *)
+	tarball=putty-${ver}.tar.gz
+	(cd /tmp && wget https://the.earth.li/~sgtatham/putty/${ver}/${tarball})
+	;;
+    esac
+    (cd ${HOME} && tar xfz /tmp/${tarball} && cd putty-*
+     if [ -f CMakeLists.txt ]; then
+	cmake . && cmake --build . && sudo cmake --build . --target install
+     else
+	./configure && make && sudo make install
+     fi
+    )
+    /usr/local/bin/plink -V
+fi
diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 8f624d21016c..edb88f23c0fb 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -1,132 +1,144 @@
 name: C/C++ CI
 
 on:
   push:
     paths: [ '**.c', '**.h', '**.m4', '**.sh', '.github/**', '**/Makefile.in', 'configure.ac' ]
   pull_request:
     paths: [ '**.c', '**.h', '**.m4', '**.sh', '.github/**', '**/Makefile.in', 'configure.ac' ]
 
 jobs:
   ci:
     if: github.repository != 'openssh/openssh-portable-selfhosted'
     strategy:
       fail-fast: false
       matrix:
         # First we test all OSes in the default configuration.
         target:
           - ubuntu-20.04
           - ubuntu-22.04
           - macos-11
           - macos-12
           - macos-13
           - windows-2019
           - windows-2022
         config: [default]
         # Then we include any extra configs we want to test for specific VMs.
         # Valgrind slows things down quite a bit, so start them first.
         include:
           - { target: windows-2019, config: cygwin-release }
           - { target: windows-2022, config: cygwin-release }
           - { target: ubuntu-20.04, config: valgrind-1 }
           - { target: ubuntu-20.04, config: valgrind-2 }
           - { target: ubuntu-20.04, config: valgrind-3 }
           - { target: ubuntu-20.04, config: valgrind-4 }
           - { target: ubuntu-20.04, config: valgrind-5 }
           - { target: ubuntu-20.04, config: valgrind-unit }
           - { target: ubuntu-20.04, config: c89 }
           - { target: ubuntu-20.04, config: clang-6.0 }
           - { target: ubuntu-20.04, config: clang-8 }
           - { target: ubuntu-20.04, config: clang-9 }
           - { target: ubuntu-20.04, config: clang-10 }
           - { target: ubuntu-20.04, config: clang-11 }
           - { target: ubuntu-20.04, config: clang-12-Werror }
           - { target: ubuntu-20.04, config: clang-sanitize-address }
           - { target: ubuntu-20.04, config: clang-sanitize-undefined }
           - { target: ubuntu-20.04, config: gcc-sanitize-address }
           - { target: ubuntu-20.04, config: gcc-sanitize-undefined }
           - { target: ubuntu-20.04, config: gcc-7 }
           - { target: ubuntu-20.04, config: gcc-8 }
           - { target: ubuntu-20.04, config: gcc-10 }
           - { target: ubuntu-22.04, config: gcc-11-Werror }
           - { target: ubuntu-22.04, config: gcc-12-Werror }
           - { target: ubuntu-20.04, config: pam }
           - { target: ubuntu-20.04, config: kitchensink }
           - { target: ubuntu-22.04, config: hardenedmalloc }
           - { target: ubuntu-20.04, config: tcmalloc }
           - { target: ubuntu-20.04, config: musl }
           - { target: ubuntu-latest, config: boringssl }
           - { target: ubuntu-latest, config: libressl-master }
           - { target: ubuntu-latest, config: libressl-3.2.6 }
           - { target: ubuntu-latest, config: libressl-3.3.6 }
           - { target: ubuntu-latest, config: libressl-3.4.3 }
           - { target: ubuntu-latest, config: libressl-3.5.3 }
           - { target: ubuntu-latest, config: libressl-3.6.1 }
           - { target: ubuntu-latest, config: libressl-3.7.2 }
-          - { target: ubuntu-latest, config: libressl-3.8.2 }
+          - { target: ubuntu-latest, config: libressl-3.8.3 }
+          - { target: ubuntu-latest, config: libressl-3.9.0 }
           - { target: ubuntu-latest, config: openssl-master }
           - { target: ubuntu-latest, config: openssl-noec }
           - { target: ubuntu-latest, config: openssl-1.1.1 }
           - { target: ubuntu-latest, config: openssl-1.1.1t }
           - { target: ubuntu-latest, config: openssl-1.1.1w }
           - { target: ubuntu-latest, config: openssl-3.0.0 }
-          - { target: ubuntu-latest, config: openssl-3.0.12 }
+          - { target: ubuntu-latest, config: openssl-3.0.13 }
           - { target: ubuntu-latest, config: openssl-3.1.0 }
-          - { target: ubuntu-latest, config: openssl-3.1.4 }
-          - { target: ubuntu-latest, config: openssl-3.2.0 }
+          - { target: ubuntu-latest, config: openssl-3.1.5 }
+          - { target: ubuntu-latest, config: openssl-3.2.1 }
           - { target: ubuntu-latest, config: openssl-1.1.1_stable }
           - { target: ubuntu-latest, config: openssl-3.0 }  # stable branch
           - { target: ubuntu-latest, config: openssl-3.2 }  # stable branch
+          - { target: ubuntu-latest, config: putty-0.71 }
+          - { target: ubuntu-latest, config: putty-0.72 }
+          - { target: ubuntu-latest, config: putty-0.73 }
+          - { target: ubuntu-latest, config: putty-0.74 }
+          - { target: ubuntu-latest, config: putty-0.75 }
+          - { target: ubuntu-latest, config: putty-0.76 }
+          - { target: ubuntu-latest, config: putty-0.77 }
+          - { target: ubuntu-latest, config: putty-0.78 }
+          - { target: ubuntu-latest, config: putty-0.79 }
+          - { target: ubuntu-latest, config: putty-0.80 }
+          - { target: ubuntu-latest, config: putty-snapshot }
           - { target: ubuntu-latest, config: zlib-develop }
           - { target: ubuntu-22.04, config: pam }
           - { target: ubuntu-22.04, config: krb5 }
           - { target: ubuntu-22.04, config: heimdal }
           - { target: ubuntu-22.04, config: libedit }
           - { target: ubuntu-22.04, config: sk }
           - { target: ubuntu-22.04, config: selinux }
           - { target: ubuntu-22.04, config: kitchensink }
           - { target: ubuntu-22.04, config: without-openssl }
           - { target: macos-11, config: pam }
           - { target: macos-12, config: pam }
           - { target: macos-13, config: pam }
     runs-on: ${{ matrix.target }}
     steps:
     - name: set cygwin git params
       if: ${{ startsWith(matrix.target, 'windows') }}
       run: git config --global core.autocrlf input
     - name: install cygwin
       if: ${{ startsWith(matrix.target, 'windows') }}
       uses: cygwin/cygwin-install-action@master
     - uses: actions/checkout@main
     - name: setup CI system
       run: sh ./.github/setup_ci.sh ${{ matrix.config }}
     - name: autoreconf
       run: sh -c autoreconf
     - name: configure
       run: sh ./.github/configure.sh ${{ matrix.config }}
     - name: save config
       uses: actions/upload-artifact@main
       with:
         name: ${{ matrix.target }}-${{ matrix.config }}-config
         path: config.h
     - name: make clean
       run: make clean
     - name: make
       run: make
     - name: make tests
       run: sh ./.github/run_test.sh ${{ matrix.config }}
       env:
         TEST_SSH_UNSAFE_PERMISSIONS: 1
         TEST_SSH_HOSTBASED_AUTH: yes
     - name: save logs
       if: failure()
       uses: actions/upload-artifact@main
       with:
         name: ${{ matrix.target }}-${{ matrix.config }}-logs
         path: |
           config.h
           config.log
           regress/*.log
           regress/valgrind-out/
           regress/asan.log.*
           regress/msan.log.*
           regress/log/*
diff --git a/.github/workflows/selfhosted.yml b/.github/workflows/selfhosted.yml
index be0b4ffec580..4f1c587a5779 100644
--- a/.github/workflows/selfhosted.yml
+++ b/.github/workflows/selfhosted.yml
@@ -1,125 +1,126 @@
 name: C/C++ CI self-hosted
 
 on:
   push:
     paths: [ '**.c', '**.h', '**.m4', '**.sh', '.github/**', '**/Makefile.in', 'configure.ac' ]
 
 jobs:
   selfhosted:
     if: github.repository == 'openssh/openssh-portable-selfhosted'
     runs-on: ${{ matrix.host }}
     timeout-minutes: 600
     env:
       HOST: ${{ matrix.host }}
       TARGET_HOST: ${{ matrix.target }}
       TARGET_CONFIG: ${{ matrix.config }}
     strategy:
       fail-fast: false
       # We use a matrix in two parts: firstly all of the VMs are tested with the
       # default config.  "target" corresponds to a label associated with the
       # worker.  The default is an ephemeral VM running under libvirt.
       matrix:
         target:
           - alpine
           - centos7
           - debian-i386
           - dfly30
           - dfly48
           - dfly60
           - dfly62
           - dfly64
           - fbsd10
           - fbsd12
           - fbsd13
           - fbsd14
           - minix3
           - nbsd3
           - nbsd4
           - nbsd8
           - nbsd9
           - obsd51
           - obsd67
           - obsd72
           - obsd73
           - obsd74
           - obsdsnap
           - obsdsnap-i386
           - openindiana
           - ubuntu-2204
         config:
           - default
         host:
           - libvirt
         include:
           # Long-running/slow tests have access to high priority runners.
           - { target: aix51, config: default, host: libvirt-hipri }
           - { target: openindiana, config: pam, host: libvirt-hipri }
           - { target: sol10,  config: default, host: libvirt-hipri }
           - { target: sol10,  config: pam, host: libvirt-hipri }
           - { target: sol11,  config: default, host: libvirt-hipri }
           - { target: sol11,  config: pam-krb5, host: libvirt-hipri }
           - { target: sol11,  config: sol64, host: libvirt-hipri }
           # Then we include extra libvirt test configs.
           - { target: centos7, config: pam, host: libvirt }
           - { target: debian-i386, config: pam, host: libvirt }
           - { target: dfly30, config: without-openssl, host: libvirt}
           - { target: dfly48, config: pam ,host: libvirt }
           - { target: dfly58, config: pam, host: libvirt }
           - { target: dfly60, config: pam, host: libvirt }
           - { target: dfly62, config: pam, host: libvirt }
           - { target: fbsd10, config: pam, host: libvirt }
           - { target: fbsd12, config: pam, host: libvirt }
           - { target: fbsd13, config: pam, host: libvirt }
           - { target: fbsd14, config: pam, host: libvirt }
           - { target: nbsd8,  config: pam, host: libvirt }
           - { target: nbsd9,  config: pam, host: libvirt }
+          - { target: nbsd10, config: pam, host: libvirt }
           # VMs with persistent disks that have their own runner.
           - { target: win10, config: default, host: win10 }
           - { target: win10, config: cygwin-release, host: win10 }
           # Physical hosts, with either native runners or remote via ssh.
           - { target: ARM, config: default, host: ARM }
           - { target: ARM64, config: default, host: ARM64 }
           - { target: ARM64, config: pam, host: ARM64 }
           - { target: debian-riscv64, config: default, host: debian-riscv64 }
           - { target: obsd-arm64, config: default, host: obsd-arm64 }
           - { target: openwrt-mips, config: default, host: openwrt-mips }
           - { target: openwrt-mipsel, config: default, host: openwrt-mipsel }
     steps:
     - name: shutdown VM if running
       run: vmshutdown
       working-directory: ${{ runner.temp }}
     - uses: actions/checkout@main
     - name: autoreconf
       run: autoreconf
     - name: startup VM
       run: vmstartup
       working-directory: ${{ runner.temp }}
     - name: configure
       run: vmrun ./.github/configure.sh ${{ matrix.config }}
     - name: save config
       uses: actions/upload-artifact@main
       with:
         name: ${{ matrix.target }}-${{ matrix.config }}-config
         path: config.h
     - name: make clean
       run: vmrun make clean
     - name: make
       run: vmrun make
     - name: make tests
       run: vmrun ./.github/run_test.sh ${{ matrix.config }}
       timeout-minutes: 600
     - name: save logs
       if: failure()
       uses: actions/upload-artifact@main
       with:
         name: ${{ matrix.target }}-${{ matrix.config }}-logs
         path: |
           config.h
           config.log
           regress/*.log
           regress/log/*
           regress/valgrind-out/
     - name: shutdown VM
       if: always()
       run: vmshutdown
       working-directory: ${{ runner.temp }}
diff --git a/.gitignore b/.gitignore
index 5e4ae5a60d06..7fccc6fe3dc3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,36 +1,38 @@
 Makefile
 buildpkg.sh
 config.h
 config.h.in
 config.h.in~
 config.log
 config.status
 configure
 aclocal.m4
 openbsd-compat/Makefile
 openbsd-compat/regress/Makefile
 openssh.xml
 opensshd.init
 survey.sh
 **/*.0
 **/*.o
 **/*.lo
 **/*.so
 **/*.out
 **/*.a
+**/*.un~
+**/.*.swp
 autom4te.cache/
 scp
 sftp
 sftp-server
 ssh
 ssh-add
 ssh-agent
 ssh-keygen
 ssh-keyscan
 ssh-keysign
 ssh-pkcs11-helper
 ssh-sk-helper
 sshd
 !regress/misc/fuzz-harness/Makefile
 !regress/unittests/sshsig/Makefile
 tags
diff --git a/.skipped-commit-ids b/.skipped-commit-ids
index 59e80518acf2..06303955c566 100644
--- a/.skipped-commit-ids
+++ b/.skipped-commit-ids
@@ -1,55 +1,57 @@
+509bb19bb9762a4b3b589af98bac2e730541b6d4	clean sshd random relinking kit
 5317f294d63a876bfc861e19773b1575f96f027d	remove libssh from makefiles
 a337e886a49f96701ccbc4832bed086a68abfa85	Makefile changes
 f2c9feb26963615c4fece921906cf72e248b61ee	more Makefile
 fa728823ba21c4b45212750e1d3a4b2086fd1a62	more Makefile refactoring
 1de0e85522051eb2ffa00437e1885e9d7b3e0c2e	moduli update
 814b2f670df75759e1581ecef530980b2b3d7e0f	remove redundant make defs
 04431e8e7872f49a2129bf080a6b73c19d576d40	moduli update
 c07772f58028fda683ee6abd41c73da3ff70d403	moduli update
 db6375fc302e3bdf07d96430c63c991b2c2bd3ff	moduli update
 5ea3d63ab972691f43e9087ab5fd8376d48e898f	uuencode.c Makefile accident
 99dd10e72c04e93849981d43d64c946619efa474	include sshbuf-misc.c
 9e1c23476bb845f3cf3d15d9032da3ed0cb2fcf5	sshbuf-misc.c in regress
 569f08445c27124ec7c7f6c0268d844ec56ac061	Makefile tweaks for !openssl
 58ec755be4e51978ecfee73539090eb68652a987	moduli update
 4bd5551b306df55379afe17d841207990eb773bf	Makefile.inc
 14806a59353152f843eb349e618abbf6f4dd3ada	Makefile.inc
 8ea4455a2d9364a0a04f9e4a2cbfa4c9fcefe77e	Makefile.inc
 d9b910e412d139141b072a905e66714870c38ac0	Makefile.inc
 7b7b619c1452a459310b0cf4391c5757c6bdbc0f	moduli update
 5010ff08f7ad92082e87dde098b20f5c24921a8f	moduli regen script update
 3bcae7a754db3fc5ad3cab63dd46774edb35b8ae	moduli regen script update
 52ff0e3205036147b2499889353ac082e505ea54	moduli update
 07b5031e9f49f2b69ac5e85b8da4fc9e393992a0	Makefile.inc
 cc12a9029833d222043aecd252d654965c351a69	moduli-gen Makefile
 7ac6c252d2a5be8fbad4c66d9d35db507c9dac5b	moduli update
 6b52cd2b637f3d29ef543f0ce532a2bce6d86af5	makefile change
 f9a0726d957cf10692a231996a1f34e7f9cdfeb0	moduli update
 1e0a2692b7e20b126dda60bf04999d1d30d959d8	sshd relinking makefile changes
 e1dc11143f83082e3154d6094f9136d0dc2637ad	more relinking makefile tweaks
+5a636f6ca7f25bfe775df4952f7aac90a7fcbbee	moduli update
 
 Old upstream tree:
 
 321065a95a7ccebdd5fd08482a1e19afbf524e35	Update DH groups
 d4f699a421504df35254cf1c6f1a7c304fb907ca	Remove 1k bit groups
 aafe246655b53b52bc32c8a24002bc262f4230f7	Remove intermediate moduli
 8fa9cd1dee3c3339ae329cf20fb591db6d605120	put back SSH1 for 6.9
 f31327a48dd4103333cc53315ec53fe65ed8a17a	Generate new moduli
 edbfde98c40007b7752a4ac106095e060c25c1ef	Regen moduli
 052fd565e3ff2d8cec3bc957d1788f50c827f8e2	Switch to tame-based sandbox
 7cf73737f357492776223da1c09179fa6ba74660	Remove moduli <2k
 180d84674be1344e45a63990d60349988187c1ae	Update moduli
 f6ae971186ba68d066cd102e57d5b0b2c211a5ee	systrace is dead.
 96c5054e3e1f170c6276902d5bc65bb3b87a2603	remove DEBUGLIBS from Makefile
 6da9a37f74aef9f9cc639004345ad893cad582d8	Update moduli file
 77bcb50e47b68c7209c7f0a5a020d73761e5143b	unset REGRESS_FAIL_EARLY
 38c2133817cbcae75c88c63599ac54228f0fa384	Change COMPILER_VERSION tests
 30c20180c87cbc99fa1020489fe7fd8245b6420c	resync integrity.sh shell
 1e6b51ddf767cbad0a4e63eb08026c127e654308	integrity.sh reliability
 fe5b31f69a60d47171836911f144acff77810217	Makefile.inc bits
 5781670c0578fe89663c9085ed3ba477cf7e7913	Delete sshconnect1.c
 ea80f445e819719ccdcb237022cacfac990fdc5c	Makefile.inc warning flags
 b92c93266d8234d493857bb822260dacf4366157	moduli-gen.sh tweak
 b25bf747544265b39af74fe0716dc8d9f5b63b95	Updated moduli
 1bd41cba06a7752de4df304305a8153ebfb6b0ac	rsa.[ch] already removed
 e39b3902fe1d6c4a7ba6a3c58e072219f3c1e604	Makefile changes
diff --git a/ChangeLog b/ChangeLog
index 981b7ecd94b6..3bbccf5ea3eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,9505 +1,8300 @@
-commit 8241b9c0529228b4b86d88b1a6076fb9f97e4a99
+commit 86bdd3853f4d32c85e295e6216a2fe0953ad93f0
 Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Dec 19 01:59:50 2023 +1100
+Date:   Mon Mar 11 16:20:49 2024 +1100
 
-    crank versions
+    version number in README
 
-commit 2f2c65cb5f1518a9c556d3e8efa27ea0ca305c6b
+commit 282721418e6465bc39ccfd39bb0133e670ee4423
 Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Dec 19 01:59:06 2023 +1100
+Date:   Mon Mar 11 16:20:08 2024 +1100
 
-    depend
+    crank RPM spec versions
 
-commit e48cdee8e19059203b1aeeabec2350b8375fa61f
+commit 3876a3bbd2ca84d23ba20f8b69ba83270c04ce3a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:50:08 2023 +0000
+Date:   Mon Mar 11 04:59:47 2024 +0000
 
-    upstream: regress test for agent PKCS#11-backed certificates
+    upstream: openssh-9.7
     
-    OpenBSD-Regress-ID: 38f681777cb944a8cc3bf9d0ad62959a16764df9
+    OpenBSD-Commit-ID: 618ececf58b8cdae016b149787af06240f7b0cbc
 
-commit 2f512f862df1d5f456f82a0334c9e8cc7208a2a1
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:49:39 2023 +0000
+commit 8fc109cc614954a8eb2738c48c0db36a62af9a06
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Mar 11 12:59:26 2024 +1100
 
-    upstream: regress test for constrained PKCS#11 keys
+    Test against current OpenSSL and LibreSSL releases.
     
-    OpenBSD-Regress-ID: b2f26ae95d609d12257b43aef7cd7714c82618ff
+    Add LibreSSL 3.9.0, bump older branches to their respective current
+    releases.
 
-commit cdddd66412ca5920ed4d3ebbfa6ace12dbd9b82f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:48:44 2023 +0000
+commit 26b09b45fec7b88ba09042c09be4157e58e231e2
+Author: Damien Miller <djm@mindrot.org>
+Date:   Sun Mar 10 16:24:57 2024 +1100
 
-    upstream: openssh-9.6
+    quote regexes used to test for algorithm support
     
-    OpenBSD-Commit-ID: 21759837cf0e0092d9a2079f8fb562071c11016b
+    Fixes test failures on Solaris 8 reported by Tom G. Christensen
 
-commit 6d51feab157cedf1e7ef5b3f8781ca8ff9c4ab1b
+commit a6a740a4948d10a622b505135bb485c10f21db5e
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:48:08 2023 +0000
+Date:   Sat Mar 9 05:12:13 2024 +0000
 
-    upstream: ssh-agent: record failed session-bind attempts
-    
-    Record failed attempts to session-bind a connection and refuse signing
-    operations on that connection henceforth.
-    
-    Prevents a future situation where we add a new hostkey type that is not
-    recognised by an older ssh-agent, that consequently causes session-bind
-    to fail (this situation is only likely to arise when people mix ssh(1)
-    and ssh-agent(1) of different versions on the same host). Previously,
-    after such a failure the agent socket would be considered unbound and
-    not subject to restriction.
+    upstream: avoid logging in signal handler by converting mainloop to
     
-    Spotted by Jann Horn
+    ppoll() bz3670, reported by Ben Hamilton; ok dtucker@
     
-    OpenBSD-Commit-ID: b0fdd023e920aa4831413f640de4c5307b53552e
+    OpenBSD-Commit-ID: e58f18042b86425405ca09e6e9d7dfa1df9f5f7f
 
-commit 7ef3787c84b6b524501211b11a26c742f829af1a
+commit cd82f7526e0481720567ae41db7849ab1c27e27b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:47:44 2023 +0000
+Date:   Fri Mar 8 22:16:32 2024 +0000
 
-    upstream: ban user/hostnames with most shell metacharacters
+    upstream: skip more whitespace, fixes find-principals on
     
-    This makes ssh(1) refuse user or host names provided on the
-    commandline that contain most shell metacharacters.
-    
-    Some programs that invoke ssh(1) using untrusted data do not filter
-    metacharacters in arguments they supply. This could create
-    interactions with user-specified ProxyCommand and other directives
-    that allow shell injection attacks to occur.
+    allowed_signers files with blank lines; reported by Wiktor Kwapisiewicz
     
-    It's a mistake to invoke ssh(1) with arbitrary untrusted arguments,
-    but getting this stuff right can be tricky, so this should prevent
-    most obvious ways of creating risky situations. It however is not
-    and cannot be perfect: ssh(1) has no practical way of interpreting
-    what shell quoting rules are in use and how they interact with the
-    user's specified ProxyCommand.
+    OpenBSD-Commit-ID: b3a22a2afd753d70766f34bc7f309c03706b5298
+
+commit 2f9d2af5cb19905d87f37d1e11c9f035ac5daf3b
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 8 11:34:10 2024 +0000
+
+    upstream: Invoke ProxyCommand that uses stderr redirection via
     
-    To allow configurations that use strange user or hostnames to
-    continue to work, this strictness is applied only to names coming
-    from the commandline. Names specified using User or Hostname
-    directives in ssh_config(5) are not affected.
+    $TEST_SHELL. Fixes test when run by a user whose login shell is tcsh.
+    Found by vinschen at redhat.com.
     
-    feedback/ok millert@ markus@ dtucker@ deraadt@
+    OpenBSD-Regress-ID: f68d79e7f00caa8d216ebe00ee5f0adbb944062a
+
+commit 9b3f0beb4007a7e01dfedabb429097fb593deae6
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Mar 7 17:18:14 2024 +1100
+
+    Prefer openssl binary from --with-ssl-dir directory.
     
-    OpenBSD-Commit-ID: 3b487348b5964f3e77b6b4d3da4c3b439e94b2d9
+    Use openssl in the directory specified by --with-ssl-dir as long
+    as it's functional.  Reported by The Doctor.
 
-commit 0cb50eefdd29f0fec31d0e71cc4b004a5f704e67
+commit c47e1c9c7911f38b2fc2fb01b1f6ae3a3121a838
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:47:20 2023 +0000
+Date:   Wed Mar 6 02:59:59 2024 +0000
 
-    upstream: stricter handling of channel window limits
-    
-    This makes ssh/sshd more strict in handling non-compliant peers that
-    send more data than the advertised channel window allows. Previously
-    the additional data would be silently discarded. This change will
-    cause ssh/sshd to terminate the connection if the channel window is
-    exceeded by more than a small grace allowance.
+    upstream: fix memory leak in mux proxy mode when requesting forwarding.
     
-    ok markus@
+    found by RASU JSC, reported by Maks Mishin in GHPR#467
     
-    OpenBSD-Commit-ID: 811e21b41831eba3dd7f67b3d409a438f20d3037
+    OpenBSD-Commit-ID: 97d96a166b1ad4b8d229864a553e3e56d3116860
 
-commit 4448a2938abc76e6bd33ba09b2ec17a216dfb491
+commit 242742827fea4508e68097c128e802edc79addb5
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:46:56 2023 +0000
+Date:   Wed Mar 6 00:31:04 2024 +0000
 
-    upstream: Make it possible to load certs from PKCS#11 tokens
-    
-    Adds a protocol extension to allow grafting certificates supplied by
-    ssh-add to keys loaded from PKCS#11 tokens in the agent.
-    
-    feedback/ok markus@
+    upstream: wrap a few PKCS#11-specific bits in ENABLE_PKCS11
     
-    OpenBSD-Commit-ID: bb5433cd28ede2bc910996eb3c0b53e20f86037f
+    OpenBSD-Commit-ID: 463e4a69eef3426a43a2b922c4e7b2011885d923
 
-commit 881d9c6af9da4257c69c327c4e2f1508b2fa754b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:46:12 2023 +0000
+commit d52b6509210e2043f33e5a1de58dd4a0d5d48c2a
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Mar 6 11:31:36 2024 +1100
 
-    upstream: apply destination constraints to all p11 keys
+    disable RSA tests when algorithm is not supported
     
-    Previously applied only to the first key returned from each token.
+    Unbreaks "make test" when compiled --without-openssl.
     
-    ok markus@
+    Similar treatment to how we do DSA and ECDSA.
+
+commit 668d270a6c77e8b5a1da26ecad2e6de9f62c8fe4
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Mar 6 10:33:20 2024 +1100
+
+    add a --without-retpoline configure option
     
-    OpenBSD-Commit-ID: 36df3afb8eb94eec6b2541f063d0d164ef8b488d
+    discussed with deraadt and dtucker a while ago
 
-commit a7ed931caeb68947d30af8a795f4108b6efad761
+commit 3deb501f86fc47e175ef6a3eaba9b9846a80d444
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:45:49 2023 +0000
+Date:   Mon Mar 4 04:13:18 2024 +0000
 
-    upstream: add "ext-info-in-auth@openssh.com" extension
-    
-    This adds another transport protocol extension to allow a sshd to send
-    SSH2_MSG_EXT_INFO during user authentication, after the server has
-    learned the username that is being logged in to.
-    
-    This lets sshd to update the acceptable signature algoritms for public
-    key authentication, and allows these to be varied via sshd_config(5)
-    "Match" directives, which are evaluated after the server learns the
-    username being authenticated.
+    upstream: fix leak of CanonicalizePermittedCNAMEs on error path;
     
-    Full details in the PROTOCOL file
+    spotted by Coverity (CID 438039)
     
-    OpenBSD-Commit-ID: 1de7da7f2b6c32a46043d75fcd49b0cbb7db7779
+    OpenBSD-Commit-ID: 208839699939721f452a4418afc028a9f9d3d8af
 
-commit 1edb00c58f8a6875fad6a497aa2bacf37f9e6cd5
+commit 65a44a8a4f7d902a64d4e60eda84384b2e2a24a2
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Dec 18 14:45:17 2023 +0000
+Date:   Mon Mar 4 02:16:11 2024 +0000
 
-    upstream: implement "strict key exchange" in ssh and sshd
+    upstream: Separate parsing of string array options from applying them
     
-    This adds a protocol extension to improve the integrity of the SSH
-    transport protocol, particular in and around the initial key exchange
-    (KEX) phase.
+    to the active configuration. This fixes the config parser from erroneously
+    rejecting cases like:
     
-    Full details of the extension are in the PROTOCOL file.
+    AuthenticationMethods password
+    Match User ivy
+     AuthenticationMethods any
     
-    with markus@
+    bz3657 ok markus@
     
-    OpenBSD-Commit-ID: 2a66ac962f0a630d7945fee54004ed9e9c439f14
+    OpenBSD-Commit-ID: 7f196cba634c2a3dba115f3fac3c4635a2199491
 
-commit 59d691b886c79e70b1d1c4ab744e81fd176222fd
+commit 6886e1b1f55c90942e4e6deed930f8ac32e0f938
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Feb 22 17:59:35 2024 +1100
+
+    Add nbsd10 test target.
+
+commit d86bf8a3f6ea4fa7887406c2aa9959db71fa41be
 Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Dec 18 14:49:11 2023 +1100
+Date:   Thu Feb 22 12:06:10 2024 +1100
 
-    better detection of broken -fzero-call-used-regs
+    more descriptive configure test name
+
+commit 9ee335aacc9f5bdc4cc2c19fafb45e27be7d234e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Feb 21 06:17:29 2024 +0000
+
+    upstream: explain arguments of internal-sftp GHPR#454 from Niklas
     
-    Use OSSH_CHECK_CFLAG_LINK() for detection of these flags and extend
-    test program to exercise varargs, which seems to catch more stuff.
+    Hambüchen
+    MIME-Version: 1.0
+    Content-Type: text/plain; charset=UTF-8
+    Content-Transfer-Encoding: 8bit
     
-    ok dtucker@
+    OpenBSD-Commit-ID: 0335d641ae6b5b6201b9ffd5dd06345ebbd0a3f3
 
-commit aa7b21708511a6d4aed3839fc9f6e82e849dd4a1
+commit d1164cb1001dd208fee88aaa9b43d5e6fd917274
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Dec 13 03:28:19 2023 +0000
+Date:   Wed Feb 21 06:06:43 2024 +0000
 
-    upstream: when invoking KnownHostsCommand to determine the order of
-    
-    host key algorithms to request, ensure that the hostname passed to the
-    command is decorated with the port number for ports other than 22.
+    upstream: clarify permissions requirements for ChrootDirectory Part
     
-    This matches the behaviour of KnownHostsCommand when invoked to look
-    up the actual host key.
+    of GHPR#454 from Niklas Hambüchen
+    MIME-Version: 1.0
+    Content-Type: text/plain; charset=UTF-8
+    Content-Transfer-Encoding: 8bit
     
-    bz3643, ok dtucker@
+    OpenBSD-Commit-ID: d37bc8786317a11649c62ff5e2936441186ef7a0
+
+commit d410e17d186552d0717f18217d0d049486754365
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Feb 21 06:05:06 2024 +0000
+
+    upstream: .Cm for a keyword. Part of GHPR#454 from Niklas Hambüchen
     
-    OpenBSD-Commit-ID: 5cfabc0b7c6c7ab473666df314f377b1f15420b1
+    OpenBSD-Commit-ID: d59c52559f926fa82859035d79749fbb4a3ce18a
 
-commit 4086bd6652c0badccc020218a62190a7798fb72c
-Author: markus@openbsd.org <markus@openbsd.org>
-Date:   Fri Dec 8 09:18:39 2023 +0000
+commit ab73f9678ebf06b32d6361b88b50b42775e0565b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Feb 21 06:01:13 2024 +0000
 
-    upstream: prevent leak in sshsig_match_principals; ok djm@
+    upstream: fix typo in match directive predicate (s/tagged/tag) GHPR#462
     
-    OpenBSD-Commit-ID: 594f61ad4819ff5c72dfe99ba666a17f0e1030ae
+    from Tobias Manske
+    
+    OpenBSD-Commit-ID: 05b23b772677d48aa82eefd7ebebd369ae758908
 
-commit 19d3ee2f3adf7d9a606ff015c1e153744702c4c9
+commit 9844aa2521ccfb1a2d73745680327b79e0574445
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Dec 6 21:06:48 2023 +0000
+Date:   Wed Feb 21 05:57:34 2024 +0000
 
-    upstream: short circuit debug log processing early if we're not going
+    upstream: fix proxy multiplexing mode, broken when keystroke timing
     
-    to log anything. From Kobe Housen
+    obfuscation was added. GHPR#463 from montag451
     
-    OpenBSD-Commit-ID: 2bcddd695872a1bef137cfff7823044dcded90ea
+    OpenBSD-Commit-ID: 4e412d59b3f557d431f1d81c715a3bc0491cc677
 
-commit 947affad4831df015c498c00c6351ea6f13895d5
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 27 09:37:28 2023 +1100
+commit ee6d932acb532f80b11bb7cf161668c70ec8a117
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Feb 20 04:10:03 2024 +0000
 
-    Add tests for OpenSSL 3.2.0 and 3.2 stable branch.
+    upstream: don't append a gratuitous space to the end of subsystem
+    
+    arguments; bz3667
+    
+    OpenBSD-Commit-ID: e11023aeb3f30b77a674e37b8292c862926d5dc6
 
-commit 747dce36206675ca6b885010a835733df469351b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Nov 25 09:03:38 2023 +1100
+commit e27f032aa8fcbae9b2e7c451baaf4b8ac6fa3d45
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Feb 19 09:25:52 2024 +0000
 
-    Use non-zero arg in compiler test program.
+    upstream: Always define puttysetup function.
     
-    Now that we're running the test program, passing zero to the test function
-    can cause divide-by-zero exceptions which might show up in logs.
+    OpenBSD-Regress-ID: b4c0ccfa4006a1bc5dfd99ccf21c854d3ce2aee0
 
-commit 3d44a5c56585d1c351dbc006240a591b6da502b1
+commit 84046f9991abef5f46b040b10cf3d494f933a17b
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Nov 24 00:31:30 2023 +0000
+Date:   Fri Feb 9 08:56:59 2024 +0000
 
-    upstream: Plug mem leak of msg when processing a quit message.
+    upstream: Exapnd PuTTY test coverage.
     
-    Coverity CID#427852, ok djm@
+    Expand the set of ciphers, MACs and KEX methods in the PuTTY interop
+    tests.
     
-    OpenBSD-Commit-ID: bf85362addbe2134c3d8c4b80f16601fbff823b7
+    OpenBSD-Regress-ID: dd28d97d48efe7329a396d0d505ee2907bf7fc57
 
-commit 1d7f9b6e297877bd00973e6dc5c0642dbefc3b5f
+commit bbf541ee2afe07b08a8b56fa0dc6f38fcfceef2a
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Nov 23 03:37:05 2023 +0000
+Date:   Fri Feb 9 08:47:42 2024 +0000
 
-    upstream: Include existing mux path in debug message.
+    upstream: Factor out PuTTY setup.
     
-    OpenBSD-Commit-ID: 1c3641be10c2f4fbad2a1b088a441d072e18bf16
+    Factor out PuTTY and call only when needed.
+    
+    This allows us to avoid PuTTY key setup when it's not needed, which
+    speeds up the overall test run by a couple of percent.
+    
+    OpenBSD-Regress-ID: c25eaccc3c91bc874400f7c85ce40e9032358c1c
 
-commit f29934066bd0e561a2e516b7e584fb92d2eedee0
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 23 19:41:27 2023 +1100
+commit d31c21c57fb4245271680a1e5043cf6470a96766
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Sat Feb 10 11:28:52 2024 +0000
 
-    Add an Ubuntu 22.04 test VM.
+    upstream: clean sshd random relinking kit; ok miod@
     
-    This is the same version as Github's runners so most of the testing on
-    it is over there, but having a local VM makes debugging much easier.
+    OpenBSD-Commit-ID: 509bb19bb9762a4b3b589af98bac2e730541b6d4
 
-commit a93284a780cd3972afe5f89086b75d564ba157f3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 23 19:36:22 2023 +1100
+commit 4dbc5a363ff53a2fcecf6bc3bcc038badc12f118
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Feb 2 00:13:34 2024 +0000
 
-    Add gcc-12 -Werror test on Ubuntu 22.04.
+    upstream: whitespace
     
-    Explictly specify gcc-11 on Ubuntu 22.04 (it's the system compiler).
+    OpenBSD-Commit-ID: b24680bc755b621ea801ff8edf6f0f02b68edae1
 
-commit 670f5a647e98b6fd95ad64f789f87ee3274b481b
+commit efde85dda2130272af24cc346f6c3cd326182ff1
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 23 19:34:57 2023 +1100
+Date:   Mon Feb 19 17:29:31 2024 +1100
 
-    Check return value from write to prevent warning.
+    Improve error message for OpenSSL header check.
     
-    ... and since we're testing for flags with -Werror, this caused
-    configure to mis-detect compiler flags.
+    bz#3668, ok djm@
 
-commit cea007d691cfedfa07a5b8599f97ce0511f53fc9
+commit cbbdf868bce431a59e2fa36ca244d5739429408d
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 22 21:18:55 2023 +1100
+Date:   Wed Feb 7 13:45:02 2024 +1100
 
-    Run compiler test program when compiling natively.
-    
-    ok djm@
+    Interop test against PuTTY snapshot and releases.
 
-commit ee0d305828f13536c0a416bbf9c3e81039d9ea55
+commit 91898bf786b0f149f962c4c96c08a46f29888c10
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 22 21:18:07 2023 +1100
+Date:   Tue Feb 6 16:21:05 2024 +1100
 
-    Factor out compiler test program into a macro.
+    Put privsep dir on OS X on /usr/local.
     
-    ok djm@
+    On some runners we can't create /var/empty, so put it some place we can
+    write.  Should fix test breakage on Max OS X 11.
 
-commit de304c76316b029df460673725a9104224b9959b
+commit be5ed8ebed8388c5056bfde4688308cc873c18b9
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 22 08:55:36 2023 +1100
+Date:   Tue Feb 6 11:19:42 2024 +1100
 
-    Add fbsd14 VM to test pool.
+    Add --disable-fd-passing option.
+    
+    .. and enable for the minix3 test VM.  This will cause it to more reliably
+    skip tests that need FD passing and should fix the current test breakage.
 
-commit 99a2df5e1994cdcb44ba2187b5f34d0e9190be91
+commit 0f6a8a0d0a518fd78c4cbebfdac990a57a1c4e41
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 21 16:19:29 2023 +1100
+Date:   Tue Feb 6 11:18:44 2024 +1100
 
-    Expand -fzero-call-used-regs test to cover gcc 11.
-    
-    It turns out that gcc also has some problems with -fzero-call-used-regs,
-    at least v11 on mips.  Previously the test in OSSH_CHECK_CFLAG_COMPILE
-    was sufficient to catch it with "=all", but not sufficient for "=used".
-    Expand the testcase and include it in the other tests for good measure.
-    See bz#3629.  ok djm@.
+    Use "skip" function instead doing it ourselves.
 
-commit ff220d4010717f7bfbbc02a2400666fb9d24f250
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 21 14:04:34 2023 +1100
+commit 3ad669f81aabbd2ba9fbd472903f680f598e1e99
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Feb 1 14:01:18 2024 +1100
 
-    Stop using -fzero-call-used-regs=all
+    ignore some vim droppings
+
+commit c283f29d23611a06bbee06bcf458f2fffad721d9
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Feb 1 02:37:33 2024 +0000
+
+    upstream: whitespace
     
-    ... since it seems to be problematic with several different versions of
-    clang.  Only use -fzero-call-used-regs=used which is less
-    problematic, except with Apple's clang where we don't use it at all.
-    bz#3629, ok djm@
+    OpenBSD-Commit-ID: bf9e4a1049562ee4322684fbdce07142f04fdbb7
 
-commit 2a19e02f36b16f0f6cc915f7d1e60ead5e36303b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 21 14:02:18 2023 +1100
+commit 0d96b1506b2f4757fefa5d1f884d49e96a6fd4c3
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Jan 16 14:40:18 2024 +1100
 
-    Allow for vendor prefix on clang version numbers.
+    skip tests that use multiplexing on Windows
     
-    Correctly detects the version of OpenBSD's native clang, as well as
-    Apple's.  Spotted tb@, ok djm@.
+    Some tests here use multiplexing, skip these if DISABLE_FD_PASSING
+    is set. Should unbreak tests on Windows.
 
-commit c52db0114826d73eff6cdbf205e9c1fa4f7ca6c6
+commit 50080fa42f5f744b798ee29400c0710f1b59f50e
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Nov 20 02:50:00 2023 +0000
+Date:   Thu Jan 11 04:50:28 2024 +0000
 
-    upstream: set errno=EAFNOSUPPORT when filtering addresses that don't
+    upstream: don't disable RSA test when DSA is disabled; bug introduced
     
-    match AddressFamily; yields slightly better error message if no address
-    matches. bz#3526
+    in last commit
     
-    OpenBSD-Commit-ID: 29cea900ddd8b04a4d1968da5c4a893be2ebd9e6
+    OpenBSD-Regress-ID: 8780a7250bf742b33010e9336359a1c516f2d7b5
 
-commit 26f3f3bbc69196d908cad6558c8c7dc5beb8d74a
+commit 415c94ce17288e0cdcb9e58cc91fba78d33c8457
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Nov 15 23:03:38 2023 +0000
+Date:   Thu Jan 11 01:45:58 2024 +0000
 
-    upstream: when connecting via socket (the default case), filter
+    upstream: make DSA testing optional, defaulting to on
     
-    addresses by AddressFamily if one was specified. Fixes the case where, if
-    CanonicalizeHostname is enabled, ssh may ignore AddressFamily. bz5326; ok
-    dtucker
+    ok markus
     
-    OpenBSD-Commit-ID: 6c7d7751f6cd055126b2b268a7b64dcafa447439
+    OpenBSD-Regress-ID: dfc27b5574e3f19dc4043395594cea5f90b8572a
 
-commit 050c335c8da43741ed0df2570ebfbd5d1dfd0a31
+commit f9311e8921d92c5efca767227a497ab63280ac39
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Nov 15 22:51:49 2023 +0000
+Date:   Thu Jan 11 01:51:16 2024 +0000
 
-    upstream: when deciding whether to enable keystroke timing
-    
-    obfuscation, only consider enabling it when a channel with a tty is open.
+    upstream: ensure key_fd is filled when DSA is disabled; spotted by
     
-    Avoids turning on the obfucation when X11 forwarding only is in use,
-    which slows it right down. Reported by Roger Marsh
+    tb@
     
-    OpenBSD-Commit-ID: c292f738db410f729190f92de100c39ec931a4f1
+    OpenBSD-Commit-ID: 9dd417b6eec3cf67e870f147464a8d93f076dce7
 
-commit 676377ce67807a24e08a54cd60ec832946cc6cae
-Author: tobhe@openbsd.org <tobhe@openbsd.org>
-Date:   Mon Nov 13 09:18:19 2023 +0000
+commit 4e838120a759d187b036036610402cbda33f3203
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Jan 11 01:45:36 2024 +0000
 
-    upstream: Make sure sftp_get_limits() only returns 0 if 'limits'
+    upstream: make DSA key support compile-time optional, defaulting to
     
-    was initialized. This fixes a potential uninitialized use of 'limits' in
-    sftp_init() if sftp_get_limits() returned early because of an unexpected
-    message type.
+    on
     
-    ok djm@
+    ok markus@
     
-    OpenBSD-Commit-ID: 1c177d7c3becc1d71bc8763eecf61873a1d3884c
+    OpenBSD-Commit-ID: 4f8e98fc1fd6de399d0921d5b31b3127a03f581d
 
-commit 64e0600f23c6dec36c3875392ac95b8a9100c2d6
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 13 20:03:31 2023 +1100
+commit afcc9028bfc411bc26d20bba803b83f90cb84e26
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Wed Jan 10 06:33:13 2024 +0000
 
-    Test current releases of LibreSSL and OpenSSL.
+    upstream: fix incorrect capitalisation;
     
-    Retire some of the older releases.
+    OpenBSD-Commit-ID: cb07eb06e15fa2334660ac73e98f29b6a1931984
 
-commit c8ed7cc545879ac15f6ce428be4b29c35598bb2a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Nov 1 02:08:38 2023 +0000
+commit 9707c8170c0c1baeb1e06e5a53f604498193885f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jan 9 22:19:36 2024 +0000
 
-    upstream: Specify ssh binary to use
+    upstream: extend ChannelTimeout regression test to exercise multiplexed
     
-    ... instead of relying on installed one.  Fixes test failures in -portable
-    when running tests prior to installation.
+    connections and the new "global" timeout type. ok dtucker@
     
-    OpenBSD-Regress-ID: b6d6ba71c23209c616efc805a60d9a445d53a685
+    OpenBSD-Regress-ID: f10d19f697024e9941acad7c2057f73d6eacb8a2
 
-commit e9fc2c48121cada1b4dcc5dadea5d447fe0093c3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 1 13:11:31 2023 +1100
+commit b31b12d28de96e1d43581d32f34da8db27e11c03
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jan 9 22:19:00 2024 +0000
 
-    Put long-running test targets on hipri runners.
+    upstream: add a "global" ChannelTimeout type to ssh(1) and sshd(8)
     
-    Some of the selfhosted test targets take a long time to run for various
-    reasons, so label them for "libvirt-hipri" runners so that they can
-    start immediately.  This should reduce the time to complete all tests.
+    that watches all open channels and will close all open channels if there is
+    no traffic on any of them for the specified interval. This is in addition to
+    the existing per-channel timeouts added a few releases ago.
+    
+    This supports use-cases like having a session + x11 forwarding channel
+    open where one may be idle for an extended period but the other is
+    actively used. The global timeout would allow closing both channels when
+    both have been idle for too long.
+    
+    ok dtucker@
+    
+    OpenBSD-Commit-ID: 0054157d24d2eaa5dc1a9a9859afefc13d1d7eb3
 
-commit 7ddf27668f0e21233f08c0ab2fe9ee3fdd6ab1e2
+commit 602f4beeeda5bb0eca181f8753d923a2997d0a51
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Nov 1 00:29:46 2023 +0000
+Date:   Tue Jan 9 21:39:14 2024 +0000
 
-    upstream: add some tests of forced commands overriding Subsystem
+    upstream: adapt ssh_api.c code for kex-strict
     
-    directives
+    from markus@ ok me
     
-    OpenBSD-Regress-ID: eb48610282f6371672bdf2a8b5d2aa33cfbd322b
+    OpenBSD-Commit-ID: 4d9f256852af2a5b882b12cae9447f8f00f933ac
 
-commit fb06f9b5a065dfbbef5916fc4accc03c0bf026dd
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Oct 31 04:15:40 2023 +0000
+commit 42ba34aba8708cf96583ff52975d95a8b47d990d
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jan 8 16:26:37 2024 +1100
 
-    upstream: Don't try to use sudo inside sshd log wrapper.
-    
-    We still need to check if we're using sudo since we don't want to chown
-    unecessarily, as on some platforms this causes an error which pollutes
-    stderr. We also don't want to unnecessarily invoke sudo, since it's
-    running in the context of the proxycommand, on *other* platforms it
-    may not be able to authenticate, and if we're using SUDO then it should
-    already be privileged.
-    
-    OpenBSD-Regress-ID: 70d58df7503db699de579a9479300e5f3735f4ee
+    nite that recent OSX tun/tap is unsupported
 
-commit fc3cc33e88c242c704781c6c48087838f1dcfa2a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Oct 31 02:58:45 2023 +0000
+commit 690bc125f9a3b20e47745fa8f5b5e1fd5820247f
+Author: Sevan Janiyan <venture37@geeklan.co.uk>
+Date:   Wed Dec 27 04:57:49 2023 +0000
 
-    upstream: Only try to chmod logfile if we have sudo. If we don't have
-    
-    sudo then we won't need to chmod.
+    README.platform: update tuntap url
+
+commit 6b8be2ccd7dd091808f86af52066b0c2ec30483a
+Author: Rose <83477269+AtariDreams@users.noreply.github.com>
+Date:   Tue Dec 19 11:48:20 2023 -0500
+
+    Fix compilation error in ssh-pcks11-client.c
     
-    OpenBSD-Regress-ID: dbad2f5ece839658ef8af3376cb1fb1cabe2e324
+    Compilation fails becaus of an undefined reference to helper_by_ec,
+    because we forgot the preprocessor conditional that excludes that function
+    from being called in unsupported configurations.
 
-commit 3a506598fddd3f18f9095af3fe917f24cbdd32e0
+commit 219c8134157744886ee6ac5b8c1650abcd981f4c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Oct 30 23:00:25 2023 +0000
+Date:   Mon Jan 8 05:11:18 2024 +0000
 
-    upstream: move PKCS#11 setup code to test-exec.sh so it can be reused
+    upstream: Remove outdated note from PROTOCOL.mux
     
-    elsewhere
+    Port forward close by control master is already implemented
+    by `mux_master_process_close_fwd` in `mux.c`
     
-    OpenBSD-Regress-ID: 1d29e6be40f994419795d9e660a8d07f538f0acb
+    GHPR442 from bigb4ng
+    
+    OpenBSD-Commit-ID: ad0734fe5916d2dc7dd02b588906cea4df0482fb
 
-commit f82fa227a52661c37404a6d33bbabf14fed05db0
+commit 4c3cf362631ccc4ffd422e572f075d5d594feace
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Oct 30 17:32:00 2023 +0000
+Date:   Mon Jan 8 05:05:15 2024 +0000
 
-    upstream: tidy and refactor PKCS#11 setup code
-    
-    Replace the use of a perl script to delete the controlling TTY with a
-    SSH_ASKPASS script to directly load the PIN.
+    upstream: fix missing field in users-groups-by-id@openssh.com reply
     
-    Move PKCS#11 setup code to functions in anticipation of it being used
-    elsewhere in additional tests.
+    documentation
     
-    Reduce stdout spam
+    GHPR441 from TJ Saunders
     
-    OpenBSD-Regress-ID: 07705c31de30bab9601a95daf1ee6bef821dd262
-
-commit 3cf698c6d4ffa9be1da55672a3519e2135a6366a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Oct 30 21:35:03 2023 +1100
-
-    Add obsd74 test VM and retire obsd69 and obsd70.
+    OpenBSD-Commit-ID: ff5733ff6ef4cd24e0758ebeed557aa91184c674
 
-commit 3e21d58a09894acb38dc69ed615d101131f473d0
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Oct 30 18:34:12 2023 +1100
+commit f64cede2a3c298b50a2659a8b53eb3ab2c0b8d23
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jan 8 04:10:03 2024 +0000
 
-    Add OpenSSL 3.3.0 as a known dev version.
+    upstream: make kex-strict section more explicit about its intent:
+    
+    banning all messages not strictly required in KEX
+    
+    OpenBSD-Commit-ID: fc33a2d7f3b7013a7fb7500bdbaa8254ebc88116
 
-commit 917ba181c2cbdb250a443589ec732aa36fd51ffa
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Oct 30 13:32:03 2023 +1100
+commit 698fe6fd61cbcb8e3e0e874a561d4335a49fbde5
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jan 8 14:46:19 2024 +1100
 
-    Restore nopasswd sudo rule on Mac OS X.
-    
-    This seems to be missing from some (but not all) github runners, so
-    restore it if it seems to be missing.
+    update fuzzer example makefile to clang16
 
-commit c5698abad6d4ec98ca20bcaaabaeacd5e1ec3f4f
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Oct 30 13:26:52 2023 +1100
+commit fc332cb2d602c60983a8ec9f89412754ace06425
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jan 8 14:45:49 2024 +1100
 
-    Don't exit early when setting up on Mac OS X.
+    unbreak fuzzers - missing pkcs11_make_cert()
     
-    We probably need some of the other bits in there (specifically, setting
-    the perms on the home directory) so make it less of a special snowflake.
+    provide stub for use in fuzzer harness
 
-commit 1d6a878ceba60b9dc14037dddc8f036070c0065f
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Oct 29 06:22:07 2023 +0000
+commit 9ea0a4524ae3276546248a926b6641b2fbc8421b
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jan 8 14:45:14 2024 +1100
 
-    upstream: Only try to chown logfiles that exist to prevent spurious
-    
-    errors.
+    unbreak fuzzers for clang16
     
-    OpenBSD-Regress-ID: f1b20a476734e885078c481f1324c9ea03af991e
+    getopt() needs a throw() attribute to compile, so supply one when compiling
+    things with C++
 
-commit e612376427a66f835e284f6b426d16d7c85301bc
-Author: anton@openbsd.org <anton@openbsd.org>
-Date:   Thu Oct 26 18:52:45 2023 +0000
+commit a72833d00788ef91100c643536ac08ada46440e1
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jan 8 00:34:33 2024 +0000
 
-    upstream: make use of bsd.regress.mk in extra and interop targets; ok
+    upstream: remove ext-info-* in the kex.c code, not in callers;
     
-    dtucker@
+    with/ok markus@
     
-    OpenBSD-Regress-ID: 7ea21b5f6fc4506165093b2123d88d20ff13a4f0
+    OpenBSD-Commit-ID: c06fe2d3a0605c517ff7d65e38ec7b2d1b0b2799
 
-commit ea0039173957d0edcd6469b9614dcedb44dcb4f9
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Oct 26 12:44:07 2023 +0000
+commit 86f9e96d9bcfd1f5cd4bf8fb57a9b4c242df67df
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jan 8 00:30:39 2024 +0000
 
-    upstream: Skip conch interop tests when not enabled instead of fatal.
+    upstream: fix typo; spotted by Albert Chin
     
-    OpenBSD-Regress-ID: b0abf81c24ac6c21f367233663228ba16fa96a46
+    OpenBSD-Commit-ID: 77140b520a43375b886e535eb8bd842a268f9368
 
-commit d220b9ed5494252b26b95f05be118472bc3ab5c0
+commit f0cbd26ec91bd49719fb3eea7ca44d2380318b9a
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Oct 25 05:38:08 2023 +0000
+Date:   Thu Jan 4 09:51:49 2024 +0000
 
     upstream: Import regenerated moduli.
     
-    OpenBSD-Commit-ID: 95f5dd6107e8902b87dc5b005ef2b53f1ff378b8
+    OpenBSD-Commit-ID: 5a636f6ca7f25bfe775df4952f7aac90a7fcbbee
 
-commit a611e4db4009447a0151f31a44e235ca32ed4429
-Author: anton@openbsd.org <anton@openbsd.org>
-Date:   Wed Oct 25 08:01:59 2023 +0000
+commit 64ddf776531ca4933832beecc8b7ebe1b937e081
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Wed Dec 20 00:06:25 2023 +0000
 
-    upstream: ssh conch interop tests requires a controlling terminal;
-    
-    ok dtucker@
+    upstream: spelling; ok markus@
     
-    OpenBSD-Regress-ID: cbf2701bc347c2f19d907f113779c666f1ecae4a
+    OpenBSD-Commit-ID: 9d01f2e9d59a999d5d42fc3b3efcf8dfb892e31b
 
-commit da951b5e08c167acb5d6e2eec6f146502f5d6ed8
-Author: anton@openbsd.org <anton@openbsd.org>
-Date:   Mon Oct 23 11:30:49 2023 +0000
+commit 503fbe9ea238a4637e8778208bde8c09bcf78475
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Tue Dec 19 06:57:34 2023 +0000
 
-    upstream: Use private key that is allowed by sshd defaults in conch
-    
-    interop tests.
-    
-    ok dtucker@
+    upstream: sort -C, and add to usage(); ok djm
     
-    OpenBSD-Regress-ID: 3b7f65c8f409c328bcd4b704f60cb3d31746f045
+    OpenBSD-Commit-ID: 80141b2a5d60c8593e3c65ca3c53c431262c812f
 
-commit 1ca166dbb3c0ce632b98869cd955f69320aa6fe8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Oct 20 20:43:00 2023 +1100
-
-    Install Dropbear for interop testing.
-
-commit f993bb58351c5cb71e61aede63805a34a6d4daea
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Oct 20 20:39:03 2023 +1100
+commit 5413b1c7ff5a19c6a7d44bd98c5a83eb47819ba6
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Dec 19 06:41:14 2023 +0000
 
-    Resync PuTTY and Conch path handling with upstream.
+    upstream: correct section numbers; from Ed Maste
     
-    Now that configure finds these for us we can remove these -portable
-    specific changes.
+    OpenBSD-Commit-ID: e289576ee5651528404cb2fb68945556052cf83f
 
-commit ff85becd5f5f06a76efa45d30fb204a3c5e5215c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Oct 20 20:35:46 2023 +1100
+commit 430ef864645cff83a4022f5b050174c840e275da
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Dec 18 15:58:56 2023 +0000
 
-    Have configure find PuTTY and Conch binaries.
+    upstream: match flag type (s/int/u_int)
     
-    This will let us remove some -portable specific changes from
-    test-exec.sh.
+    OpenBSD-Commit-ID: 9422289747c35ccb7b31d0e1888ccd5e74ad566a
 
-commit c54a50359b9cecddbf3ffcdc26efcb3cd6071ec1
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Oct 20 07:37:07 2023 +0000
+commit 1036d77b34a5fa15e56f516b81b9928006848cbd
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Dec 22 17:56:26 2023 +1100
 
-    upstream: Allow overriding the locations of the Dropbear binaries
+    better detection of broken -fzero-call-used-regs
     
-    similar to what we do for the PuTTY ones.
+    gcc 13.2.0 on ppc64le refuses to compile some function, including
+    cipher.c:compression_alg_list() with an error:
     
-    OpenBSD-Regress-ID: 7de0e00518fb0c8fdc5f243b7f82f523c936049c
-
-commit fbaa707d455a61d0aef8ae65e02a25bac5351e5c
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Oct 20 06:56:45 2023 +0000
-
-    upstream: Add interop test with Dropbear.
+    > sorry, unimplemented: argument ‘used’ is not supportedcw
+    > for ‘-fzero-call-used-regs’ on this target
     
-    Right now this is only dbclient not the Dropbear server since it won't
-    currently run as a ProxyCommand.
+    This extends the autoconf will-it-work test with a similarly-
+    structured function that seems to catch this.
     
-    OpenBSD-Regress-ID: 8cb898c414fcdb252ca6328896b0687acdaee496
+    Spotted/tested by Colin Watson; bz3645
 
-commit c2003d0dbdcdb61ca336c3f90c5c2b4a09c8e73f
-Author: Fabio Pedretti <pedretti.fabio@gmail.com>
-Date:   Mon Oct 16 11:59:53 2023 +0200
+commit 8241b9c0529228b4b86d88b1a6076fb9f97e4a99
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Dec 19 01:59:50 2023 +1100
 
-    Update openssl-devel dependency in RPM spec.
-    
-    Since openssh 9.4p1, openssl >= 1.1.1 is required, so
-    build with --without-openssl elsewhere.
-    According to https://repology.org/project/openssl/versions
-    openssl 1.1.1 is available on fedora >= 29 and rhel >= 8.
-    Successfully build tested, installed and run on rhel 6
+    crank versions
 
-commit 064e09cd632721c7e6889904e07767443ee23821
-Author: Fabio Pedretti <pedretti.fabio@gmail.com>
-Date:   Mon Oct 16 10:13:06 2023 +0200
+commit 2f2c65cb5f1518a9c556d3e8efa27ea0ca305c6b
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Dec 19 01:59:06 2023 +1100
 
-    Remove reference of dropped sshd.pam.old file
-    
-    The file was removed in openssh 8.8
+    depend
 
-commit 62db354b696b378a164b6e478cb6b0171dcb0c3d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Oct 16 08:40:00 2023 +0000
+commit e48cdee8e19059203b1aeeabec2350b8375fa61f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Dec 18 14:50:08 2023 +0000
 
-    upstream: Move declaration of "len" into the block where it's used.
-    
-    This lets us compile Portable with -Werror with when OpenSSL doesn't have
-    Ed25519 support.
+    upstream: regress test for agent PKCS#11-backed certificates
     
-    OpenBSD-Commit-ID: e02e4b4af351946562a7caee905da60eff16ba29
+    OpenBSD-Regress-ID: 38f681777cb944a8cc3bf9d0ad62959a16764df9
 
-commit 6eee8c972d5901d10e80634a006b4e346b2c8c19
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Oct 13 15:15:05 2023 +1100
+commit 2f512f862df1d5f456f82a0334c9e8cc7208a2a1
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Dec 18 14:49:39 2023 +0000
 
-    run t-extra regress tests
+    upstream: regress test for constrained PKCS#11 keys
     
-    This exposes the t-extra regress tests (including agent-pkcs11.sh) as
-    a new extra-tests target in the top level Makefile and runs them by
-    default. ok dtucker@
+    OpenBSD-Regress-ID: b2f26ae95d609d12257b43aef7cd7714c82618ff
 
-commit 637624dbbac13f2bc3c8ec5b15c9d627d07f2935
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Oct 12 22:01:23 2023 +1100
+commit cdddd66412ca5920ed4d3ebbfa6ace12dbd9b82f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Dec 18 14:48:44 2023 +0000
 
-    Don't use make -j2.
+    upstream: openssh-9.6
     
-    While we have 2 cores available on github runners, not using it means
-    that the most recent log message is the actual failure, rather than
-    having to search back through the log for it.
-
-commit 971e0cfcfd52ef1d73cf5244074c306a60006e89
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Oct 12 16:23:05 2023 +1100
-
-    Correct arg order for ED255519 AC_LINK_IFELSE test.
+    OpenBSD-Commit-ID: 21759837cf0e0092d9a2079f8fb562071c11016b
 
-commit c616e64688b2a0c1b4daad69b056099be998d121
+commit 6d51feab157cedf1e7ef5b3f8781ca8ff9c4ab1b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 03:51:08 2023 +0000
+Date:   Mon Dec 18 14:48:08 2023 +0000
 
-    upstream: typos and extra debug trace calls
+    upstream: ssh-agent: record failed session-bind attempts
     
-    OpenBSD-Regress-ID: 98a2a6b9333743274359e3c0f0e65cf919a591d1
-
-commit c49a3fbf10162128c67c59562348de2041188974
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 03:48:53 2023 +0000
-
-    upstream: ensure logs are owned by correct user; feedback/ok
+    Record failed attempts to session-bind a connection and refuse signing
+    operations on that connection henceforth.
     
-    dtucker@
+    Prevents a future situation where we add a new hostkey type that is not
+    recognised by an older ssh-agent, that consequently causes session-bind
+    to fail (this situation is only likely to arise when people mix ssh(1)
+    and ssh-agent(1) of different versions on the same host). Previously,
+    after such a failure the agent socket would be considered unbound and
+    not subject to restriction.
     
-    OpenBSD-Regress-ID: c3297af8f07717f1d400a5d34529962f1a76b5a3
+    Spotted by Jann Horn
+    
+    OpenBSD-Commit-ID: b0fdd023e920aa4831413f640de4c5307b53552e
 
-commit 5ec0ed79ac074c3437b25f6cba8b8cf21c8d4587
+commit 7ef3787c84b6b524501211b11a26c742f829af1a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 03:36:32 2023 +0000
+Date:   Mon Dec 18 14:47:44 2023 +0000
 
-    upstream: 64 %-expansion keys ought to be enough for anybody; ok
+    upstream: ban user/hostnames with most shell metacharacters
     
-    dtucker (we just hit the previous limit in some cases)
+    This makes ssh(1) refuse user or host names provided on the
+    commandline that contain most shell metacharacters.
     
-    OpenBSD-Commit-ID: 84070f8001ec22ff5d669f836b62f206e08c5787
-
-commit f59a94e22e46db2c23eddeb871aa9e8d93ab0016
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 02:48:43 2023 +0000
-
-    upstream: don't dereference NULL pointer when hashing jumphost
+    Some programs that invoke ssh(1) using untrusted data do not filter
+    metacharacters in arguments they supply. This could create
+    interactions with user-specified ProxyCommand and other directives
+    that allow shell injection attacks to occur.
     
-    OpenBSD-Commit-ID: 251c0263e1759a921341c7efe7f1d4c73e1c70f4
-
-commit 281c79168edcc303abfd5bca983616eaa24c5f32
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Oct 12 13:20:01 2023 +1100
-
-    Solaris: prefer PRIV_XPOLICY to PRIV_LIMIT
+    It's a mistake to invoke ssh(1) with arbitrary untrusted arguments,
+    but getting this stuff right can be tricky, so this should prevent
+    most obvious ways of creating risky situations. It however is not
+    and cannot be perfect: ssh(1) has no practical way of interpreting
+    what shell quoting rules are in use and how they interact with the
+    user's specified ProxyCommand.
     
-    If the system support PRIV_XPOLICY and one is set, then don't
-    modify PRIV_LIMIT. bz2833, patch from Ron Jordan, ok dtucker@
+    To allow configurations that use strange user or hostnames to
+    continue to work, this strictness is applied only to names coming
+    from the commandline. Names specified using User or Hostname
+    directives in ssh_config(5) are not affected.
+    
+    feedback/ok millert@ markus@ dtucker@ deraadt@
+    
+    OpenBSD-Commit-ID: 3b487348b5964f3e77b6b4d3da4c3b439e94b2d9
 
-commit 98fc34df837f3a3b79d2a111b96fe8a39adcab55
+commit 0cb50eefdd29f0fec31d0e71cc4b004a5f704e67
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 02:18:18 2023 +0000
+Date:   Mon Dec 18 14:47:20 2023 +0000
 
-    upstream: add %j token that expands to the configured ProxyJump
+    upstream: stricter handling of channel window limits
     
-    hostname (or the empty string if this option is not being used). bz3610, ok
-    dtucker
+    This makes ssh/sshd more strict in handling non-compliant peers that
+    send more data than the advertised channel window allows. Previously
+    the additional data would be silently discarded. This change will
+    cause ssh/sshd to terminate the connection if the channel window is
+    exceeded by more than a small grace allowance.
     
-    OpenBSD-Commit-ID: ce9983f7efe6a178db90dc5c1698df025df5e339
+    ok markus@
+    
+    OpenBSD-Commit-ID: 811e21b41831eba3dd7f67b3d409a438f20d3037
 
-commit 7f3180be8a85320b5d3221714b40c16e66881249
+commit 4448a2938abc76e6bd33ba09b2ec17a216dfb491
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 02:15:53 2023 +0000
+Date:   Mon Dec 18 14:46:56 2023 +0000
 
-    upstream: release GSS OIDs only at end of authentication; bz2982,
+    upstream: Make it possible to load certs from PKCS#11 tokens
     
-    ok dtucker@
+    Adds a protocol extension to allow grafting certificates supplied by
+    ssh-add to keys loaded from PKCS#11 tokens in the agent.
     
-    OpenBSD-Commit-ID: 0daa41e0525ae63cae4483519ecaa37ac485d94c
+    feedback/ok markus@
+    
+    OpenBSD-Commit-ID: bb5433cd28ede2bc910996eb3c0b53e20f86037f
 
-commit a612b93de5d86e955bfb6e24278f621118eea500
+commit 881d9c6af9da4257c69c327c4e2f1508b2fa754b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 12 02:12:53 2023 +0000
+Date:   Mon Dec 18 14:46:12 2023 +0000
 
-    upstream: mask SIGINT/TERM/QUIT/HUP before checking quit_pending
+    upstream: apply destination constraints to all p11 keys
     
-    and use ppoll() to unmask them in the mainloop. Avoids race condition between
-    signaling ssh to exit and polling. bz3531; ok dtucker
+    Previously applied only to the first key returned from each token.
     
-    OpenBSD-Commit-ID: 5c14e1aabcddedb95cdf972283d9c0d5083229e7
+    ok markus@
+    
+    OpenBSD-Commit-ID: 36df3afb8eb94eec6b2541f063d0d164ef8b488d
 
-commit 531b27a006116fe7aff325510aaa576f24844452
+commit a7ed931caeb68947d30af8a795f4108b6efad761
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 23:23:58 2023 +0000
+Date:   Mon Dec 18 14:45:49 2023 +0000
 
-    upstream: sync usage() with ssh.1; spotted by kn@
+    upstream: add "ext-info-in-auth@openssh.com" extension
     
-    OpenBSD-Commit-ID: 191a85639477dcb5fa1616d270d93b7c8d5c1dfd
+    This adds another transport protocol extension to allow a sshd to send
+    SSH2_MSG_EXT_INFO during user authentication, after the server has
+    learned the username that is being logged in to.
+    
+    This lets sshd to update the acceptable signature algoritms for public
+    key authentication, and allows these to be varied via sshd_config(5)
+    "Match" directives, which are evaluated after the server learns the
+    username being authenticated.
+    
+    Full details in the PROTOCOL file
+    
+    OpenBSD-Commit-ID: 1de7da7f2b6c32a46043d75fcd49b0cbb7db7779
 
-commit 64f7ca881b19be754425dca60d1590d306c9d1d0
+commit 1edb00c58f8a6875fad6a497aa2bacf37f9e6cd5
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 23:14:33 2023 +0000
+Date:   Mon Dec 18 14:45:17 2023 +0000
 
-    upstream: ssh -Q does not make sense with other command-line options,
+    upstream: implement "strict key exchange" in ssh and sshd
     
-    so give it its own line in the manpage
+    This adds a protocol extension to improve the integrity of the SSH
+    transport protocol, particular in and around the initial key exchange
+    (KEX) phase.
     
-    OpenBSD-Commit-ID: 00a747f0655c12122bbb77c2796be0013c105361
+    Full details of the extension are in the PROTOCOL file.
+    
+    with markus@
+    
+    OpenBSD-Commit-ID: 2a66ac962f0a630d7945fee54004ed9e9c439f14
 
-commit a752a6c0e1001f93696d7025f0c867f0376e2ecf
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 22:42:26 2023 +0000
+commit 59d691b886c79e70b1d1c4ab744e81fd176222fd
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Dec 18 14:49:11 2023 +1100
 
-    upstream: add ChannelTimeout support to the client, mirroring the
+    better detection of broken -fzero-call-used-regs
     
-    same option in the server. ok markus@
+    Use OSSH_CHECK_CFLAG_LINK() for detection of these flags and extend
+    test program to exercise varargs, which seems to catch more stuff.
     
-    OpenBSD-Commit-ID: 55630b26f390ac063980cfe7ad8c54b03284ef02
+    ok dtucker@
 
-commit 76e91e7238cdc5662bc818e2a48d466283840d23
+commit aa7b21708511a6d4aed3839fc9f6e82e849dd4a1
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 22:41:05 2023 +0000
+Date:   Wed Dec 13 03:28:19 2023 +0000
 
-    upstream: add support for reading ED25519 private keys in PEM PKCS8
+    upstream: when invoking KnownHostsCommand to determine the order of
     
-    format; ok markus@ tb@
+    host key algorithms to request, ensure that the hostname passed to the
+    command is decorated with the port number for ports other than 22.
     
-    OpenBSD-Commit-ID: 01b85c91757e6b057e9b23b8a23f96415c3c7174
+    This matches the behaviour of KnownHostsCommand when invoked to look
+    up the actual host key.
+    
+    bz3643, ok dtucker@
+    
+    OpenBSD-Commit-ID: 5cfabc0b7c6c7ab473666df314f377b1f15420b1
 
-commit fc77c8e352c0f44125425c05265e3a00c183d78a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 06:40:54 2023 +0000
+commit 4086bd6652c0badccc020218a62190a7798fb72c
+Author: markus@openbsd.org <markus@openbsd.org>
+Date:   Fri Dec 8 09:18:39 2023 +0000
 
-    upstream: mention "none" is a valid argument to IdentityFile; bz3080
+    upstream: prevent leak in sshsig_match_principals; ok djm@
     
-    OpenBSD-Commit-ID: 1b4fb590ef731099349a7d468b77f02b240ac926
+    OpenBSD-Commit-ID: 594f61ad4819ff5c72dfe99ba666a17f0e1030ae
 
-commit c97520d23d1fe53d30725a2af25d2dddd6f2faff
+commit 19d3ee2f3adf7d9a606ff015c1e153744702c4c9
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 05:42:08 2023 +0000
+Date:   Wed Dec 6 21:06:48 2023 +0000
 
-    upstream: in olde rcp/scp protocol mode, when rejecting a path from the
+    upstream: short circuit debug log processing early if we're not going
     
-    server as not matching the glob that the client sent, log (at debug level)
-    the received pathname as well as the list of possible expected paths expanded
-    from the glob. bz2966
+    to log anything. From Kobe Housen
     
-    OpenBSD-Commit-ID: 0bd8db8a595334ca86bca8f36e23fc0395315765
+    OpenBSD-Commit-ID: 2bcddd695872a1bef137cfff7823044dcded90ea
 
-commit 208c2b719879805983398160791d6a1ef9c2c3fc
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 11 04:46:29 2023 +0000
+commit 947affad4831df015c498c00c6351ea6f13895d5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Nov 27 09:37:28 2023 +1100
 
-    upstream: s/%.100s/%s/ in SSH- banner construction as there's no
-    
-    reason to limit its size: the version string bring included is a compile time
-    constant going into an allocated banner string.
-    
-    OpenBSD-Commit-ID: 0ef73304b9bf3e534c60900cd84ab699f859ebcd
+    Add tests for OpenSSL 3.2.0 and 3.2 stable branch.
 
-commit 0354790826b97c41bbd171a965574e159b58d83e
-Author: tb@openbsd.org <tb@openbsd.org>
-Date:   Tue Oct 10 06:49:54 2023 +0000
+commit 747dce36206675ca6b885010a835733df469351b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Nov 25 09:03:38 2023 +1100
 
-    upstream: Garbage collect cipher_get_keyiv_len()
-    
-    This is a compat20 leftover, unused since 2017.
-    
-    ok djm
+    Use non-zero arg in compiler test program.
     
-    OpenBSD-Commit-ID: 91fa5497c9dc6883064624ac27813a567883fdce
+    Now that we're running the test program, passing zero to the test function
+    can cause divide-by-zero exceptions which might show up in logs.
 
-commit 8d29ee4115001a02641386ae394992c65ed279e0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Oct 10 03:57:45 2023 +0000
+commit 3d44a5c56585d1c351dbc006240a591b6da502b1
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Nov 24 00:31:30 2023 +0000
 
-    upstream: Reserve a range of "local extension" message numbers that
+    upstream: Plug mem leak of msg when processing a quit message.
     
-    OpenSSH promises not to use (comment change only)
+    Coverity CID#427852, ok djm@
     
-    OpenBSD-Commit-ID: e61795b453d4892d2c99ce1039112c4a00250e03
+    OpenBSD-Commit-ID: bf85362addbe2134c3d8c4b80f16601fbff823b7
 
-commit 90b0d73d63a706e85f6431f05a62d2ce1b476472
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 6 03:32:15 2023 +0000
+commit 1d7f9b6e297877bd00973e6dc5c0642dbefc3b5f
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Nov 23 03:37:05 2023 +0000
 
-    upstream: typo in error message
+    upstream: Include existing mux path in debug message.
     
-    OpenBSD-Regress-ID: 6a8edf0dc39941298e3780b147b10c0a600b4fee
+    OpenBSD-Commit-ID: 1c3641be10c2f4fbad2a1b088a441d072e18bf16
 
-commit e84517f51532ec913d8fb01a8aab7307134774bb
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 6 03:25:14 2023 +0000
+commit f29934066bd0e561a2e516b7e584fb92d2eedee0
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Nov 23 19:41:27 2023 +1100
 
-    upstream: Perform the softhsm2 setup as discrete steps rather than
-    
-    as a long shell pipeline. Makes it easier to figure out what has happened
-    when it breaks.
+    Add an Ubuntu 22.04 test VM.
     
-    OpenBSD-Regress-ID: b3f1292115fed65765d0a95414df16e27772d81c
+    This is the same version as Github's runners so most of the testing on
+    it is over there, but having a local VM makes debugging much easier.
 
-commit cb54becff4d776238e0e9072943ba0872260535d
-Author: claudio@openbsd.org <claudio@openbsd.org>
-Date:   Sun Sep 24 08:14:13 2023 +0000
+commit a93284a780cd3972afe5f89086b75d564ba157f3
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Nov 23 19:36:22 2023 +1100
 
-    upstream: REGRESS_FAIL_EARLY defaults to yes now. So no need to
-    
-    overload the value here anymore. OK tb@ bluhm@
+    Add gcc-12 -Werror test on Ubuntu 22.04.
     
-    OpenBSD-Regress-ID: f063330f1bebbcd373100afccebc91a965b14496
+    Explictly specify gcc-11 on Ubuntu 22.04 (it's the system compiler).
 
-commit f01f5137ceba65baf34ceac5a298c12ac01b1fef
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Wed Oct 4 05:42:10 2023 +0000
+commit 670f5a647e98b6fd95ad64f789f87ee3274b481b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Nov 23 19:34:57 2023 +1100
 
-    upstream: spelling fix;
+    Check return value from write to prevent warning.
     
-    OpenBSD-Commit-ID: 493f95121567e5ab0d9dd1150f873b5535ca0195
+    ... and since we're testing for flags with -Werror, this caused
+    configure to mis-detect compiler flags.
 
-commit 80a2f64b8c1d27383cc83d182b73920d1e6a91f1
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Oct 4 15:34:10 2023 +1100
+commit cea007d691cfedfa07a5b8599f97ce0511f53fc9
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 22 21:18:55 2023 +1100
 
-    crank version numbers
+    Run compiler test program when compiling natively.
+    
+    ok djm@
 
-commit f65f187b105d9b5c12fd750a211397d08c17c6d4
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 4 04:04:09 2023 +0000
+commit ee0d305828f13536c0a416bbf9c3e81039d9ea55
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 22 21:18:07 2023 +1100
 
-    upstream: openssh-9.5
+    Factor out compiler test program into a macro.
     
-    OpenBSD-Commit-ID: 5e0af680480bd3b6f5560cf840ad032d48fd6b16
+    ok djm@
 
-commit ffe27e54a4bb18d5d3bbd3f4cc93a41b8d94dfd2
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Oct 4 04:03:50 2023 +0000
+commit de304c76316b029df460673725a9104224b9959b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 22 08:55:36 2023 +1100
 
-    upstream: add some cautionary text about % token expansion and
-    
-    shell metacharacters; based on report from vinci AT protonmail.ch
-    
-    OpenBSD-Commit-ID: aa1450a54fcee2f153ef70368d90edb1e7019113
+    Add fbsd14 VM to test pool.
 
-commit 60ec3d54fd1ebfe2dda75893fa1e870b8dffbb0d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Oct 3 23:56:10 2023 +0000
+commit 99a2df5e1994cdcb44ba2187b5f34d0e9190be91
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 21 16:19:29 2023 +1100
 
-    upstream: fix link to agent draft; spotted by Jann Horn
+    Expand -fzero-call-used-regs test to cover gcc 11.
     
-    OpenBSD-Commit-ID: ff5bda21a83ec013db683e282256a85201d2dc4b
+    It turns out that gcc also has some problems with -fzero-call-used-regs,
+    at least v11 on mips.  Previously the test in OSSH_CHECK_CFLAG_COMPILE
+    was sufficient to catch it with "=all", but not sufficient for "=used".
+    Expand the testcase and include it in the other tests for good measure.
+    See bz#3629.  ok djm@.
 
-commit 12e2d4b13f6f63ce2de13cbfcc9e4d0d4b4ab231
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Oct 4 10:54:04 2023 +1100
+commit ff220d4010717f7bfbbc02a2400666fb9d24f250
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 21 14:04:34 2023 +1100
 
-    use portable provider allowlist path in manpage
+    Stop using -fzero-call-used-regs=all
     
-    spotted by Jann Horn
+    ... since it seems to be problematic with several different versions of
+    clang.  Only use -fzero-call-used-regs=used which is less
+    problematic, except with Apple's clang where we don't use it at all.
+    bz#3629, ok djm@
 
-commit 6c2c6ffde75df95fd838039850d3dd3d84956d87
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Tue Sep 19 20:37:07 2023 +0000
+commit 2a19e02f36b16f0f6cc915f7d1e60ead5e36303b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 21 14:02:18 2023 +1100
 
-    upstream: typo; from Jim Spath
+    Allow for vendor prefix on clang version numbers.
     
-    OpenBSD-Commit-ID: 2f5fba917b5d4fcf93d9e0b0756c7f63189e228e
+    Correctly detects the version of OpenBSD's native clang, as well as
+    Apple's.  Spotted tb@, ok djm@.
 
-commit b6b49130a0089b297245ee39e769231d7c763014
+commit c52db0114826d73eff6cdbf205e9c1fa4f7ca6c6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Sep 10 23:12:32 2023 +0000
+Date:   Mon Nov 20 02:50:00 2023 +0000
 
-    upstream: rename remote_glob() -> sftp_glob() to match other API
+    upstream: set errno=EAFNOSUPPORT when filtering addresses that don't
     
-    OpenBSD-Commit-ID: d9dfb3708d824ec02970a84d96cf5937e0887229
+    match AddressFamily; yields slightly better error message if no address
+    matches. bz#3526
+    
+    OpenBSD-Commit-ID: 29cea900ddd8b04a4d1968da5c4a893be2ebd9e6
 
-commit 21b79af6c8d2357c822c84cef3fbdb8001ed263b
+commit 26f3f3bbc69196d908cad6558c8c7dc5beb8d74a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Sep 10 03:51:55 2023 +0000
+Date:   Wed Nov 15 23:03:38 2023 +0000
 
-    upstream: typo in comment
+    upstream: when connecting via socket (the default case), filter
     
-    OpenBSD-Commit-ID: 69285e0ce962a7c6b0ab5f17a293c60a0a360a18
-
-commit 41232d25532b4d2ef6c5db62efc0cf50a79d26ca
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Sep 10 15:45:38 2023 +1000
-
-    Use zero-call-used-regs=used with Apple compilers.
+    addresses by AddressFamily if one was specified. Fixes the case where, if
+    CanonicalizeHostname is enabled, ssh may ignore AddressFamily. bz5326; ok
+    dtucker
     
-    Apple's versions of clang have version numbers that do not match the
-    corresponding upstream clang versions.  Unfortunately, they do still
-    have the clang-15 zero-call-used-regs=all bug, so for now use the value
-    that doesn't result in segfaults.  We could allowlist future versions
-    that are known to work.  bz#3584 (and probably also our github CI
-    failures).
+    OpenBSD-Commit-ID: 6c7d7751f6cd055126b2b268a7b64dcafa447439
 
-commit 90ccc5918ea505bf156c31148b6b59a1bf5d6dc6
+commit 050c335c8da43741ed0df2570ebfbd5d1dfd0a31
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Sep 10 03:25:53 2023 +0000
+Date:   Wed Nov 15 22:51:49 2023 +0000
 
-    upstream: randomise keystroke obfuscation intervals and average
+    upstream: when deciding whether to enable keystroke timing
     
-    interval rate. ok dtucker@
+    obfuscation, only consider enabling it when a channel with a tty is open.
     
-    OpenBSD-Commit-ID: 05f61d051ab418fcfc4857ff306e420037502382
+    Avoids turning on the obfucation when X11 forwarding only is in use,
+    which slows it right down. Reported by Roger Marsh
+    
+    OpenBSD-Commit-ID: c292f738db410f729190f92de100c39ec931a4f1
 
-commit bd1b9e52f5fa94d87223c90905c5fdc1a7c32aa6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 06:34:24 2023 +0000
+commit 676377ce67807a24e08a54cd60ec832946cc6cae
+Author: tobhe@openbsd.org <tobhe@openbsd.org>
+Date:   Mon Nov 13 09:18:19 2023 +0000
 
-    upstream: fix sizeof(*ptr) instead sizeof(ptr) in realloc (pointer here
+    upstream: Make sure sftp_get_limits() only returns 0 if 'limits'
     
-    is char**, so harmless); spotted in CID 416964
+    was initialized. This fixes a potential uninitialized use of 'limits' in
+    sftp_init() if sftp_get_limits() returned early because of an unexpected
+    message type.
     
-    OpenBSD-Commit-ID: c61caa4a5a667ee20bb1042098861e6c72c69002
+    ok djm@
+    
+    OpenBSD-Commit-ID: 1c177d7c3becc1d71bc8763eecf61873a1d3884c
 
-commit c4f966482983e18601eec70a1563115de836616f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 06:10:57 2023 +0000
+commit 64e0600f23c6dec36c3875392ac95b8a9100c2d6
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Nov 13 20:03:31 2023 +1100
 
-    upstream: regress test recursive remote-remote directories copies where
+    Test current releases of LibreSSL and OpenSSL.
     
-    the directory contains a symlink to another directory.
+    Retire some of the older releases.
+
+commit c8ed7cc545879ac15f6ce428be4b29c35598bb2a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Nov 1 02:08:38 2023 +0000
+
+    upstream: Specify ssh binary to use
     
-    also remove errant `set -x` that snuck in at some point
+    ... instead of relying on installed one.  Fixes test failures in -portable
+    when running tests prior to installation.
     
-    OpenBSD-Regress-ID: 1c94a48bdbd633ef2285954ee257725cd7bc456f
+    OpenBSD-Regress-ID: b6d6ba71c23209c616efc805a60d9a445d53a685
 
-commit 5e1dfe5014ebc194641678303e22ab3bba15f4e5
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 06:10:02 2023 +0000
+commit e9fc2c48121cada1b4dcc5dadea5d447fe0093c3
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 1 13:11:31 2023 +1100
 
-    upstream: fix recursive remote-remote copies of directories that
-    
-    contain symlinks to other directories (similar to bz3611)
+    Put long-running test targets on hipri runners.
     
-    OpenBSD-Commit-ID: 7e19d2ae09b4f941bf8eecc3955c9120171da37f
+    Some of the selfhosted test targets take a long time to run for various
+    reasons, so label them for "libvirt-hipri" runners so that they can
+    start immediately.  This should reduce the time to complete all tests.
 
-commit 7c0ce2bf98b303b6ad91493ee3247d96c18ba1f6
+commit 7ddf27668f0e21233f08c0ab2fe9ee3fdd6ab1e2
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 05:50:57 2023 +0000
+Date:   Wed Nov 1 00:29:46 2023 +0000
 
-    upstream: regress test for recursive copies of directories containing
+    upstream: add some tests of forced commands overriding Subsystem
     
-    symlinks to other directories. bz3611, ok dtucker@
+    directives
     
-    OpenBSD-Regress-ID: eaa4c29cc5cddff4e72a16bcce14aeb1ecfc94b9
+    OpenBSD-Regress-ID: eb48610282f6371672bdf2a8b5d2aa33cfbd322b
 
-commit 2de990142a83bf60ef694378b8598706bc654b08
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 05:56:13 2023 +0000
+commit fb06f9b5a065dfbbef5916fc4accc03c0bf026dd
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Oct 31 04:15:40 2023 +0000
 
-    upstream: the sftp code was one of my first contributions to
+    upstream: Don't try to use sudo inside sshd log wrapper.
     
-    OpenSSH and it shows - the function names are terrible.
+    We still need to check if we're using sudo since we don't want to chown
+    unecessarily, as on some platforms this causes an error which pollutes
+    stderr. We also don't want to unnecessarily invoke sudo, since it's
+    running in the context of the proxycommand, on *other* platforms it
+    may not be able to authenticate, and if we're using SUDO then it should
+    already be privileged.
     
-    Rename do_blah() to sftp_blah() to make them less so.
+    OpenBSD-Regress-ID: 70d58df7503db699de579a9479300e5f3735f4ee
+
+commit fc3cc33e88c242c704781c6c48087838f1dcfa2a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Oct 31 02:58:45 2023 +0000
+
+    upstream: Only try to chmod logfile if we have sudo. If we don't have
     
-    Completely mechanical except for sftp_stat() and sftp_lstat() which
-    change from returning a pointer to a static variable (error-prone) to
-    taking a pointer to a caller-provided receiver.
+    sudo then we won't need to chmod.
     
-    OpenBSD-Commit-ID: eb54d6a72d0bbba4d623e2175cf5cc4c75dc2ba4
+    OpenBSD-Regress-ID: dbad2f5ece839658ef8af3376cb1fb1cabe2e324
 
-commit 249d8bd0472b53e3a2a0e138b4c030a31e83346a
+commit 3a506598fddd3f18f9095af3fe917f24cbdd32e0
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 8 05:50:12 2023 +0000
+Date:   Mon Oct 30 23:00:25 2023 +0000
 
-    upstream: fix scp in SFTP mode recursive upload and download of
+    upstream: move PKCS#11 setup code to test-exec.sh so it can be reused
     
-    directories that contain symlinks to other directories. In scp mode, the
-    links would be followed, but in SFTP mode they were not. bz3611, ok dtucker@
+    elsewhere
     
-    OpenBSD-Commit-ID: 9760fda668eaa94a992250d7670dfbc62a45197c
+    OpenBSD-Regress-ID: 1d29e6be40f994419795d9e660a8d07f538f0acb
 
-commit 0e1f4401c466fa4fdaea81b6dadc8dd1fc4cf0af
+commit f82fa227a52661c37404a6d33bbabf14fed05db0
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:36:09 2023 +0000
+Date:   Mon Oct 30 17:32:00 2023 +0000
 
-    upstream: regression test for override of subsystem in match blocks
+    upstream: tidy and refactor PKCS#11 setup code
     
-    OpenBSD-Regress-ID: 5f8135da3bfda71067084c048d717b0e8793e87c
-
-commit 8a1450c62035e834d8a79a5d0d1c904236f9dcfe
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:35:35 2023 +0000
-
-    upstream: allow override of Sybsystem directives in sshd Match
+    Replace the use of a perl script to delete the controlling TTY with a
+    SSH_ASKPASS script to directly load the PIN.
     
-    blocks
+    Move PKCS#11 setup code to functions in anticipation of it being used
+    elsewhere in additional tests.
     
-    OpenBSD-Commit-ID: 3911d18a826a2d2fe7e4519075cf3e57af439722
+    Reduce stdout spam
+    
+    OpenBSD-Regress-ID: 07705c31de30bab9601a95daf1ee6bef821dd262
 
-commit 6e52826e2a74d077147a82ead8d4fbd5b54f4e3b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:26:37 2023 +0000
+commit 3cf698c6d4ffa9be1da55672a3519e2135a6366a
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Oct 30 21:35:03 2023 +1100
 
-    upstream: allocate the subsystems array as necessary and remove the
-    
-    fixed limit of subsystems. Saves a few kb of memory in the server and makes
-    it more like the other options.
-    
-    OpenBSD-Commit-ID: e683dfca6bdcbc3cc339bb6c6517c0c4736a547f
+    Add obsd74 test VM and retire obsd69 and obsd70.
 
-commit e19069c9fac4c111d6496b19c7f7db43b4f07b4f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:23:53 2023 +0000
+commit 3e21d58a09894acb38dc69ed615d101131f473d0
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Oct 30 18:34:12 2023 +1100
 
-    upstream: preserve quoting of Subsystem commands and arguments.
-    
-    This may change behaviour of exotic configurations, but the most common
-    subsystem configuration (sftp-server) is unlikely to be affected.
-    
-    OpenBSD-Commit-ID: 8ffa296aeca981de5b0945242ce75aa6dee479bf
+    Add OpenSSL 3.3.0 as a known dev version.
 
-commit 52dfe3c72d98503d8b7c6f64fc7e19d685636c0b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:21:36 2023 +0000
+commit 917ba181c2cbdb250a443589ec732aa36fd51ffa
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Oct 30 13:32:03 2023 +1100
 
-    upstream: downgrade duplicate Subsystem directives from being a
-    
-    fatal error to being a debug message to match behaviour with just about all
-    other directives.
+    Restore nopasswd sudo rule on Mac OS X.
     
-    OpenBSD-Commit-ID: fc90ed2cc0c18d4eb8e33d2c5e98d25f282588ce
+    This seems to be missing from some (but not all) github runners, so
+    restore it if it seems to be missing.
 
-commit 1ee0a16e07b6f0847ff463d7b5221c4bf1876e25
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 6 23:18:15 2023 +0000
+commit c5698abad6d4ec98ca20bcaaabaeacd5e1ec3f4f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Oct 30 13:26:52 2023 +1100
 
-    upstream: handle cr+lf (instead of just cr) in sshsig signature
-    
-    files
+    Don't exit early when setting up on Mac OS X.
     
-    OpenBSD-Commit-ID: 647460a212b916540016d066568816507375fd7f
+    We probably need some of the other bits in there (specifically, setting
+    the perms on the home directory) so make it less of a special snowflake.
 
-commit e1c284d60a928bcdd60bc575c6f9604663502770
-Author: job@openbsd.org <job@openbsd.org>
-Date:   Mon Sep 4 10:29:58 2023 +0000
+commit 1d6a878ceba60b9dc14037dddc8f036070c0065f
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sun Oct 29 06:22:07 2023 +0000
 
-    upstream: Generate Ed25519 keys when invoked without arguments
-    
-    Ed25519 public keys are very convenient due to their small size.
-    OpenSSH has supported Ed25519 since version 6.5 (January 2014).
+    upstream: Only try to chown logfiles that exist to prevent spurious
     
-    OK djm@ markus@ sthen@ deraadt@
+    errors.
     
-    OpenBSD-Commit-ID: f498beaad19c8cdcc357381a60df4a9c69858b3f
+    OpenBSD-Regress-ID: f1b20a476734e885078c481f1324c9ea03af991e
 
-commit 694150ad92765574ff82a18f4e86322bd3231e68
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 4 00:08:14 2023 +0000
+commit e612376427a66f835e284f6b426d16d7c85301bc
+Author: anton@openbsd.org <anton@openbsd.org>
+Date:   Thu Oct 26 18:52:45 2023 +0000
 
-    upstream: trigger keystroke timing obfucation only if the channels
-    
-    layer enqueud some data in the last poll() cycle; this avoids triggering the
-    obfuscatior for non-channels data like ClientAlive probes and also fixes a
-    related problem were the obfucations would be triggered on fully quiescent
-    connections.
+    upstream: make use of bsd.regress.mk in extra and interop targets; ok
     
-    Based on / tested by naddy@
+    dtucker@
     
-    OpenBSD-Commit-ID: d98f32dc62d7663ff4660e4556e184032a0db123
+    OpenBSD-Regress-ID: 7ea21b5f6fc4506165093b2123d88d20ff13a4f0
 
-commit b5fd97896b59a3a46245cf438cc8b16c795d9f74
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 4 00:04:02 2023 +0000
+commit ea0039173957d0edcd6469b9614dcedb44dcb4f9
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Oct 26 12:44:07 2023 +0000
 
-    upstream: avoid bogus "obfuscate_keystroke_timing: stopping ..."
+    upstream: Skip conch interop tests when not enabled instead of fatal.
     
-    debug messages when keystroke timing obfuscation was never started; spotted
-    by naddy@
+    OpenBSD-Regress-ID: b0abf81c24ac6c21f367233663228ba16fa96a46
+
+commit d220b9ed5494252b26b95f05be118472bc3ab5c0
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Oct 25 05:38:08 2023 +0000
+
+    upstream: Import regenerated moduli.
     
-    OpenBSD-Commit-ID: 5c270d35f7d2974db5c1646e9c64188f9393be31
+    OpenBSD-Commit-ID: 95f5dd6107e8902b87dc5b005ef2b53f1ff378b8
 
-commit ccf7d913db34e49b7a6db1b8331bd402004c840d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 4 00:01:46 2023 +0000
+commit a611e4db4009447a0151f31a44e235ca32ed4429
+Author: anton@openbsd.org <anton@openbsd.org>
+Date:   Wed Oct 25 08:01:59 2023 +0000
 
-    upstream: make channel_output_poll() return a flag indicating
+    upstream: ssh conch interop tests requires a controlling terminal;
     
-    whether channel data was enqueued. Will be used to improve keystroke timing
-    obfuscation. Problem spotted by / tested by naddy@
+    ok dtucker@
     
-    OpenBSD-Commit-ID: f9776c7b0065ba7c3bbe50431fd3b629f44314d0
+    OpenBSD-Regress-ID: cbf2701bc347c2f19d907f113779c666f1ecae4a
 
-commit 43254b326ac6e2131dbd750f9464dc62c14bd5a7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Sep 3 23:59:32 2023 +0000
+commit da951b5e08c167acb5d6e2eec6f146502f5d6ed8
+Author: anton@openbsd.org <anton@openbsd.org>
+Date:   Mon Oct 23 11:30:49 2023 +0000
 
-    upstream: set interactive mode for ControlPersist sessions if they
+    upstream: Use private key that is allowed by sshd defaults in conch
     
-    originally requested a tty; enables keystroke timing obfuscation for most
-    ControlPersist sessions. Spotted by naddy@
+    interop tests.
     
-    OpenBSD-Commit-ID: 72783a26254202e2f3f41a2818a19956fe49a772
+    ok dtucker@
+    
+    OpenBSD-Regress-ID: 3b7f65c8f409c328bcd4b704f60cb3d31746f045
 
-commit ff3eda68ceb2e2bb8f48e3faceb96076c3e85c20
+commit 1ca166dbb3c0ce632b98869cd955f69320aa6fe8
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 31 23:02:35 2023 +1000
+Date:   Fri Oct 20 20:43:00 2023 +1100
 
-    Set LLONG_MAX for C89 test.
-    
-    If we don't have LLONG_MAX, configure will figure out that it can get it
-    by setting -std=gnu99, at which point we won't be testing C89 any more.
-    To avoid this, feed it in via CFLAGS.
+    Install Dropbear for interop testing.
 
-commit f98031773db361424d59e3301aa92aacf423d920
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Aug 29 02:50:10 2023 +0000
+commit f993bb58351c5cb71e61aede63805a34a6d4daea
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Oct 20 20:39:03 2023 +1100
 
-    upstream: make PerSourceMaxStartups first-match-wins; ok dtucker@
+    Resync PuTTY and Conch path handling with upstream.
     
-    OpenBSD-Commit-ID: dac0c24cb709e3c595b8b4f422a0355dc5a3b4e7
+    Now that configure finds these for us we can remove these -portable
+    specific changes.
 
-commit cfa66857db90cd908de131e0041a50ffc17c7df8
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 28 09:52:09 2023 +0000
+commit ff85becd5f5f06a76efa45d30fb204a3c5e5215c
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Oct 20 20:35:46 2023 +1100
 
-    upstream: descriptive text shouldn't be under .Cm
+    Have configure find PuTTY and Conch binaries.
     
-    OpenBSD-Commit-ID: b1afaeb456a52bc8a58f4f9f8b2f9fa8f6bf651b
+    This will let us remove some -portable specific changes from
+    test-exec.sh.
 
-commit 01dbf3d46651b7d6ddf5e45d233839bbfffaeaec
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 28 09:48:11 2023 +0000
+commit c54a50359b9cecddbf3ffcdc26efcb3cd6071ec1
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Oct 20 07:37:07 2023 +0000
 
-    upstream: limit artificial login delay to a reasonable maximum (5s)
+    upstream: Allow overriding the locations of the Dropbear binaries
     
-    and don't delay at all for the "none" authentication mechanism. Patch by
-    Dmitry Belyavskiy in bz3602 with polish/ok dtucker@
+    similar to what we do for the PuTTY ones.
     
-    OpenBSD-Commit-ID: 85b364676dd84cf1de0e98fc2fbdcb1a844ce515
+    OpenBSD-Regress-ID: 7de0e00518fb0c8fdc5f243b7f82f523c936049c
 
-commit 528da5b9d7c5da01ed7a73ff21c722e1b5326006
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Mon Aug 28 05:32:28 2023 +0000
+commit fbaa707d455a61d0aef8ae65e02a25bac5351e5c
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Oct 20 06:56:45 2023 +0000
 
-    upstream: add spacing for punctuation when macro args;
+    upstream: Add interop test with Dropbear.
     
-    OpenBSD-Commit-ID: e80343c16ce0420b2aec98701527cf90371bd0db
+    Right now this is only dbclient not the Dropbear server since it won't
+    currently run as a ProxyCommand.
+    
+    OpenBSD-Regress-ID: 8cb898c414fcdb252ca6328896b0687acdaee496
 
-commit 3867361ca691d0956ef7d5fb8181cf554a91d84a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 28 04:06:52 2023 +0000
+commit c2003d0dbdcdb61ca336c3f90c5c2b4a09c8e73f
+Author: Fabio Pedretti <pedretti.fabio@gmail.com>
+Date:   Mon Oct 16 11:59:53 2023 +0200
 
-    upstream: explicit long long type in timing calculations (doesn't
-    
-    matter, since the range is pre-clamped)
+    Update openssl-devel dependency in RPM spec.
     
-    OpenBSD-Commit-ID: f786ed902d04a5b8ecc581d068fea1a79aa772de
+    Since openssh 9.4p1, openssl >= 1.1.1 is required, so
+    build with --without-openssl elsewhere.
+    According to https://repology.org/project/openssl/versions
+    openssl 1.1.1 is available on fedora >= 29 and rhel >= 8.
+    Successfully build tested, installed and run on rhel 6
 
-commit 7603ba71264e7fa938325c37eca993e2fa61272f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 28 03:31:16 2023 +0000
+commit 064e09cd632721c7e6889904e07767443ee23821
+Author: Fabio Pedretti <pedretti.fabio@gmail.com>
+Date:   Mon Oct 16 10:13:06 2023 +0200
 
-    upstream: Add keystroke timing obfuscation to the client.
-    
-    This attempts to hide inter-keystroke timings by sending interactive
-    traffic at fixed intervals (default: every 20ms) when there is only a
-    small amount of data being sent. It also sends fake "chaff" keystrokes
-    for a random interval after the last real keystroke. These are
-    controlled by a new ssh_config ObscureKeystrokeTiming keyword/
-    
-    feedback/ok markus@
+    Remove reference of dropped sshd.pam.old file
     
-    OpenBSD-Commit-ID: 02231ddd4f442212820976068c34a36e3c1b15be
+    The file was removed in openssh 8.8
 
-commit dce6d80d2ed3cad2c516082682d5f6ca877ef714
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 28 03:28:43 2023 +0000
+commit 62db354b696b378a164b6e478cb6b0171dcb0c3d
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Oct 16 08:40:00 2023 +0000
 
-    upstream: Introduce a transport-level ping facility
+    upstream: Move declaration of "len" into the block where it's used.
     
-    This adds a pair of SSH transport protocol messages SSH2_MSG_PING/PONG
-    to implement a ping capability. These messages use numbers in the "local
-    extensions" number space and are advertised using a "ping@openssh.com"
-    ext-info message with a string version number of "0".
-    
-    ok markus@
-    
-    OpenBSD-Commit-ID: b6b3c4cb2084c62f85a8dc67cf74954015eb547f
-
-commit d2d247938b38b928f8a6e1a47a330c5584d3a358
-Author: tobhe@openbsd.org <tobhe@openbsd.org>
-Date:   Mon Aug 21 21:16:18 2023 +0000
-
-    upstream: Log errors in kex_exchange_identification() with level
-    
-    verbose instead of error to reduce preauth log spam. All of those get logged
-    with a more generic error message by sshpkt_fatal().
-    
-    feedback from sthen@
-    ok djm@
+    This lets us compile Portable with -Werror with when OpenSSL doesn't have
+    Ed25519 support.
     
-    OpenBSD-Commit-ID: bd47dab4695b134a44c379f0e9a39eed33047809
+    OpenBSD-Commit-ID: e02e4b4af351946562a7caee905da60eff16ba29
 
-commit 9d7193a8359639801193ad661a59d1ae4dc3d302
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 21 04:59:54 2023 +0000
+commit 6eee8c972d5901d10e80634a006b4e346b2c8c19
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Oct 13 15:15:05 2023 +1100
 
-    upstream: correct math for ClientAliveInterval that caused the
-    
-    probes to be sent less frequently than configured; from Dawid Majchrzak
+    run t-extra regress tests
     
-    OpenBSD-Commit-ID: 641153e7c05117436ddfc58267aa267ca8b80038
+    This exposes the t-extra regress tests (including agent-pkcs11.sh) as
+    a new extra-tests target in the top level Makefile and runs them by
+    default. ok dtucker@
 
-commit 3c6ab63b383b0b7630da175941e01de9db32a256
+commit 637624dbbac13f2bc3c8ec5b15c9d627d07f2935
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 25 14:48:02 2023 +1000
+Date:   Thu Oct 12 22:01:23 2023 +1100
 
-    Include Portable version in sshd version string.
+    Don't use make -j2.
     
-    bz#3608, ok djm@
+    While we have 2 cores available on github runners, not using it means
+    that the most recent log message is the actual failure, rather than
+    having to search back through the log for it.
 
-commit 17fa6cd10a26e193bb6f65d21264d2fe553bcd87
+commit 971e0cfcfd52ef1d73cf5244074c306a60006e89
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 21 19:47:58 2023 +1000
+Date:   Thu Oct 12 16:23:05 2023 +1100
 
-    obsd-arm64 host is real hardware...
-    
-    so put in the correct config location.
+    Correct arg order for ED255519 AC_LINK_IFELSE test.
 
-commit 598ca75c85acaaacee5ef954251e489cc20d7be9
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 21 18:38:36 2023 +1000
+commit c616e64688b2a0c1b4daad69b056099be998d121
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Oct 12 03:51:08 2023 +0000
 
-    Add OpenBSD ARM64 test host.
+    upstream: typos and extra debug trace calls
+    
+    OpenBSD-Regress-ID: 98a2a6b9333743274359e3c0f0e65cf919a591d1
 
-commit 1acac79bfbe207e8db639e8043524962037c8feb
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 21 18:05:26 2023 +1000
+commit c49a3fbf10162128c67c59562348de2041188974
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Oct 12 03:48:53 2023 +0000
 
-    Add test for zlib development branch.
+    upstream: ensure logs are owned by correct user; feedback/ok
+    
+    dtucker@
+    
+    OpenBSD-Regress-ID: c3297af8f07717f1d400a5d34529962f1a76b5a3
 
-commit 84efebf352fc700e9040c8065707c63caedd36a3
+commit 5ec0ed79ac074c3437b25f6cba8b8cf21c8d4587
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 21 04:36:46 2023 +0000
+Date:   Thu Oct 12 03:36:32 2023 +0000
 
-    upstream: want stdlib.h for free(3)
+    upstream: 64 %-expansion keys ought to be enough for anybody; ok
     
-    OpenBSD-Commit-ID: 743af3c6e3ce5e6cecd051668f0327a01f44af29
+    dtucker (we just hit the previous limit in some cases)
+    
+    OpenBSD-Commit-ID: 84070f8001ec22ff5d669f836b62f206e08c5787
 
-commit cb4ed12ffc332d1f72d054ed92655b5f1c38f621
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Aug 19 07:39:08 2023 +1000
+commit f59a94e22e46db2c23eddeb871aa9e8d93ab0016
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Oct 12 02:48:43 2023 +0000
 
-    Fix zlib version check for 1.3 and future version.
+    upstream: don't dereference NULL pointer when hashing jumphost
     
-    bz#3604.
+    OpenBSD-Commit-ID: 251c0263e1759a921341c7efe7f1d4c73e1c70f4
 
-commit 25b75e21f16bccdaa472ea1889b293c9bd51a87b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 14 11:10:08 2023 +1000
+commit 281c79168edcc303abfd5bca983616eaa24c5f32
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Oct 12 13:20:01 2023 +1100
 
-    Add 9.4 branch to CI status page.
+    Solaris: prefer PRIV_XPOLICY to PRIV_LIMIT
+    
+    If the system support PRIV_XPOLICY and one is set, then don't
+    modify PRIV_LIMIT. bz2833, patch from Ron Jordan, ok dtucker@
 
-commit 803e22eabd3ba75485eedd8b7b44d6ace79f2052
+commit 98fc34df837f3a3b79d2a111b96fe8a39adcab55
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 18 01:37:41 2023 +0000
+Date:   Thu Oct 12 02:18:18 2023 +0000
 
-    upstream: fix regression in OpenSSH 9.4 (mux.c r1.99) that caused
+    upstream: add %j token that expands to the configured ProxyJump
     
-    multiplexed sessions to ignore SIGINT under some circumstances. Reported by /
-    feedback naddy@, ok dtucker@
+    hostname (or the empty string if this option is not being used). bz3610, ok
+    dtucker
     
-    OpenBSD-Commit-ID: 4d5c6c894664f50149153fd4764f21f43e7d7e5a
+    OpenBSD-Commit-ID: ce9983f7efe6a178db90dc5c1698df025df5e339
 
-commit e706bca324a70f68dadfd0ec69edfdd486eed23a
+commit 7f3180be8a85320b5d3221714b40c16e66881249
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Aug 16 16:14:11 2023 +0000
+Date:   Thu Oct 12 02:15:53 2023 +0000
 
-    upstream: defence-in-depth MaxAuthTries check in monitor; ok markus
+    upstream: release GSS OIDs only at end of authentication; bz2982,
     
-    OpenBSD-Commit-ID: 65a4225dc708e2dae71315adf93677edace46c21
+    ok dtucker@
+    
+    OpenBSD-Commit-ID: 0daa41e0525ae63cae4483519ecaa37ac485d94c
 
-commit d1ab7eb90474df656d5e9935bae6df0bd000d343
+commit a612b93de5d86e955bfb6e24278f621118eea500
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 14 03:37:00 2023 +0000
+Date:   Thu Oct 12 02:12:53 2023 +0000
 
-    upstream: add message number of SSH2_MSG_NEWCOMPRESS defined in RFC8308
+    upstream: mask SIGINT/TERM/QUIT/HUP before checking quit_pending
     
-    OpenBSD-Commit-ID: 6c984171c96ed67effd7b5092f3d3975d55d6028
-
-commit fa8da52934cb7dff6f660a143276bdb28bb9bbe1
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Aug 13 15:01:27 2023 +1000
-
-    Add obsd72 and obsd73 test targets.
+    and use ppoll() to unmask them in the mainloop. Avoids race condition between
+    signaling ssh to exit and polling. bz3531; ok dtucker
+    
+    OpenBSD-Commit-ID: 5c14e1aabcddedb95cdf972283d9c0d5083229e7
 
-commit f9f18006678d2eac8b0c5a5dddf17ab7c50d1e9f
+commit 531b27a006116fe7aff325510aaa576f24844452
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Aug 10 23:05:48 2023 +0000
+Date:   Wed Oct 11 23:23:58 2023 +0000
 
-    upstream: better debug logging of sessions' exit status
+    upstream: sync usage() with ssh.1; spotted by kn@
     
-    OpenBSD-Commit-ID: 82237567fcd4098797cbdd17efa6ade08e1a36b0
+    OpenBSD-Commit-ID: 191a85639477dcb5fa1616d270d93b7c8d5c1dfd
 
-commit a8c57bcb077f0cfdffcf9f23866bf73bb93e185c
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Thu Aug 10 14:37:32 2023 +0000
+commit 64f7ca881b19be754425dca60d1590d306c9d1d0
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Oct 11 23:14:33 2023 +0000
 
-    upstream: drop a wayward comma, ok jmc@
+    upstream: ssh -Q does not make sense with other command-line options,
     
-    OpenBSD-Commit-ID: 5c11fbb9592a29b37bbf36f66df50db9d38182c6
-
-commit e962f9b318a238db1becc53c2bf79dd3a49095b4
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Aug 10 11:10:22 2023 +1000
-
-    depend
-
-commit 0fcb60bf83130dfa428bc4422b3a3ac20fb528af
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Aug 10 11:05:42 2023 +1000
-
-    update versions in RPM specs
-
-commit d0cee4298491314f09afa1c4383a66d913150b26
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Aug 10 11:05:14 2023 +1000
-
-    update version in README
+    so give it its own line in the manpage
+    
+    OpenBSD-Commit-ID: 00a747f0655c12122bbb77c2796be0013c105361
 
-commit 78b4dc6684f4d35943b46b24ee645edfdb9974f5
+commit a752a6c0e1001f93696d7025f0c867f0376e2ecf
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Aug 10 01:01:07 2023 +0000
+Date:   Wed Oct 11 22:42:26 2023 +0000
 
-    upstream: openssh-9.4
+    upstream: add ChannelTimeout support to the client, mirroring the
     
-    OpenBSD-Commit-ID: 71fc1e01a4c4ea061b252bd399cda7be757e6e35
-
-commit 58ca4f0aa8c4306ac0a629c9a85fb1efaf4ff092
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 10 11:30:24 2023 +1000
-
-    Only include unistd.h once.
-
-commit 3961ed02dc578517a9d2535128cff5c3a5460d28
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Aug 10 09:08:49 2023 +1000
-
-    wrap poll.h include in HAVE_POLL_H
+    same option in the server. ok markus@
+    
+    OpenBSD-Commit-ID: 55630b26f390ac063980cfe7ad8c54b03284ef02
 
-commit e535fbe2af893046c28adfcd787c1fdbae36a24a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Aug 4 06:32:40 2023 +0000
+commit 76e91e7238cdc5662bc818e2a48d466283840d23
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Oct 11 22:41:05 2023 +0000
 
-    upstream: Apply ConnectTimeout to multiplexing local socket
+    upstream: add support for reading ED25519 private keys in PEM PKCS8
     
-    connections.  If the multiplex socket exists but the connection times out,
-    ssh will fall back to a direct connection the same way it would if the socket
-    did not exist at all.  ok djm@
+    format; ok markus@ tb@
     
-    OpenBSD-Commit-ID: 2fbe1a36d4a24b98531b2d298a6557c8285dc1b4
+    OpenBSD-Commit-ID: 01b85c91757e6b057e9b23b8a23f96415c3c7174
 
-commit 9d92e7b24848fcc605945f7c2e3460c7c31832ce
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 3 19:35:33 2023 +1000
+commit fc77c8e352c0f44125425c05265e3a00c183d78a
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Oct 11 06:40:54 2023 +0000
 
-    Fix RNG seeding for OpenSSL w/out self seeding.
+    upstream: mention "none" is a valid argument to IdentityFile; bz3080
     
-    When sshd is built with an OpenSSL that does not self-seed, it would
-    fail in the preauth privsep process while handling a new connection.
-    Sanity checked by djm@
+    OpenBSD-Commit-ID: 1b4fb590ef731099349a7d468b77f02b240ac926
 
-commit f70010d9b0b3e7e95de8aa0b961e1d74362cfb5d
+commit c97520d23d1fe53d30725a2af25d2dddd6f2faff
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Aug 2 23:04:38 2023 +0000
+Date:   Wed Oct 11 05:42:08 2023 +0000
 
-    upstream: CheckHostIP has defaulted to 'no' for a while; make the
+    upstream: in olde rcp/scp protocol mode, when rejecting a path from the
     
-    commented- out config option match. From Ed Maste
+    server as not matching the glob that the client sent, log (at debug level)
+    the received pathname as well as the list of possible expected paths expanded
+    from the glob. bz2966
     
-    OpenBSD-Commit-ID: e66e934c45a9077cb1d51fc4f8d3df4505db58d9
+    OpenBSD-Commit-ID: 0bd8db8a595334ca86bca8f36e23fc0395315765
 
-commit c88a8788f9865d02b986d00405b9f0be65ad0b5a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Aug 1 08:15:04 2023 +0000
+commit 208c2b719879805983398160791d6a1ef9c2c3fc
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Oct 11 04:46:29 2023 +0000
 
-    upstream: remove unnecessary if statement.
+    upstream: s/%.100s/%s/ in SSH- banner construction as there's no
     
-    github PR#422 from eyalasulin999, ok djm@
+    reason to limit its size: the version string bring included is a compile time
+    constant going into an allocated banner string.
     
-    OpenBSD-Commit-ID: 2b6b0dde4407e039f58f86c8d2ff584a8205ea55
+    OpenBSD-Commit-ID: 0ef73304b9bf3e534c60900cd84ab699f859ebcd
 
-commit 77b8b865cd5a8c79a47605c0c5b2bacf4692c4d5
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Jul 28 05:42:36 2023 +0000
+commit 0354790826b97c41bbd171a965574e159b58d83e
+Author: tb@openbsd.org <tb@openbsd.org>
+Date:   Tue Oct 10 06:49:54 2023 +0000
 
-    upstream: %C is a callable macro in mdoc(7)
-    
-    so, as we do for %D, escape it;
+    upstream: Garbage collect cipher_get_keyiv_len()
     
-    OpenBSD-Commit-ID: 538cfcddbbb59dc3a8739604319491dcb8e0c0c9
-
-commit e0f91aa9c2fbfc951e9ced7e1305455fc614d3f2
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jul 28 05:33:15 2023 +0000
-
-    upstream: don't need to start a command here; use ssh -N instead.
+    This is a compat20 leftover, unused since 2017.
     
-    Fixes failure on cygwin spotted by Darren
+    ok djm
     
-    OpenBSD-Regress-ID: ff678a8cc69160a3b862733d935ec4a383f93cfb
+    OpenBSD-Commit-ID: 91fa5497c9dc6883064624ac27813a567883fdce
 
-commit f446a44f30bc680e0d026a4204844b02646c1c2d
+commit 8d29ee4115001a02641386ae394992c65ed279e0
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed May 17 05:52:01 2023 +0000
+Date:   Tue Oct 10 03:57:45 2023 +0000
 
-    upstream: add LTESTS_FROM variable to allow skipping of tests up to
+    upstream: Reserve a range of "local extension" message numbers that
     
-    a specific point. e.g. "make LTESTS_FROM=t-sftp" will only run the sftp.sh
-    test and subsequent ones. ok dtucker@
+    OpenSSH promises not to use (comment change only)
     
-    OpenBSD-Regress-ID: 07f653de731def074b29293db946042706fcead3
+    OpenBSD-Commit-ID: e61795b453d4892d2c99ce1039112c4a00250e03
 
-commit 8eb8899d612440a9b608bee7f916081d3d0b7812
+commit 90b0d73d63a706e85f6431f05a62d2ce1b476472
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri May 12 06:37:42 2023 +0000
+Date:   Fri Oct 6 03:32:15 2023 +0000
 
-    upstream: test ChrootDirectory in Match block
+    upstream: typo in error message
     
-    OpenBSD-Regress-ID: a6150262f39065939f025e546af2a346ffe674c1
+    OpenBSD-Regress-ID: 6a8edf0dc39941298e3780b147b10c0a600b4fee
 
-commit e43f43d3f19516222e9a143468ea0dc1b3ab67b6
+commit e84517f51532ec913d8fb01a8aab7307134774bb
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri May 12 06:36:27 2023 +0000
+Date:   Fri Oct 6 03:25:14 2023 +0000
 
-    upstream: better error messages
+    upstream: Perform the softhsm2 setup as discrete steps rather than
     
-    OpenBSD-Regress-ID: 55e4186604e80259496d841e690ea2090981bc7a
+    as a long shell pipeline. Makes it easier to figure out what has happened
+    when it breaks.
+    
+    OpenBSD-Regress-ID: b3f1292115fed65765d0a95414df16e27772d81c
 
-commit 6958f00acf3b9e0b3730f7287e69996bcf3ceda4
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jul 27 22:26:49 2023 +0000
+commit cb54becff4d776238e0e9072943ba0872260535d
+Author: claudio@openbsd.org <claudio@openbsd.org>
+Date:   Sun Sep 24 08:14:13 2023 +0000
 
-    upstream: don't incorrectly truncate logged strings retrieved from
+    upstream: REGRESS_FAIL_EARLY defaults to yes now. So no need to
     
-    PKCS#11 modules; based on GHPR406 by Jakub Jelen; ok markus
+    overload the value here anymore. OK tb@ bluhm@
     
-    OpenBSD-Commit-ID: 7ed1082f23a13b38c373008f856fd301d50012f9
+    OpenBSD-Regress-ID: f063330f1bebbcd373100afccebc91a965b14496
 
-commit d1ffde6b55170cd4b9a72bfd9a3f17508e6cf714
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jul 27 22:25:17 2023 +0000
+commit f01f5137ceba65baf34ceac5a298c12ac01b1fef
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Wed Oct 4 05:42:10 2023 +0000
 
-    upstream: make sshd_config AuthorizedPrincipalsCommand and
-    
-    AuthorizedKeysCommand accept the %D (routing domain) and a new %C (connection
-    address/port 4-tuple) as expansion sequences; ok markus
+    upstream: spelling fix;
     
-    OpenBSD-Commit-ID: ee9a48bf1a74c4ace71b69de69cfdaa2a7388565
+    OpenBSD-Commit-ID: 493f95121567e5ab0d9dd1150f873b5535ca0195
 
-commit 999a2886ca1844a7a74b905e5f2c8c701f9838cd
+commit 80a2f64b8c1d27383cc83d182b73920d1e6a91f1
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Oct 4 15:34:10 2023 +1100
+
+    crank version numbers
+
+commit f65f187b105d9b5c12fd750a211397d08c17c6d4
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jul 27 22:23:05 2023 +0000
+Date:   Wed Oct 4 04:04:09 2023 +0000
 
-    upstream: increase default KDF work-factor for OpenSSH format
-    
-    private keys from 16 to 24; { feedback ok } x { deraadt markus }
+    upstream: openssh-9.5
     
-    OpenBSD-Commit-ID: a3afb1383f8ff0a49613d449f02395d9e8d4a9ec
+    OpenBSD-Commit-ID: 5e0af680480bd3b6f5560cf840ad032d48fd6b16
 
-commit 0fa803a1dd1c7b546c166000e23a869cf6c4ec10
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 27 02:25:09 2023 +1000
+commit ffe27e54a4bb18d5d3bbd3f4cc93a41b8d94dfd2
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Oct 4 04:03:50 2023 +0000
 
-    Prefer OpenSSL's SHA256 in sk-dummy.so
-    
-    Previously sk-dummy.so used libc's (or compat's) SHA256 since it may be
-    built without OpenSSL.  In many cases, however, including both libc's
-    and OpenSSL's headers together caused conflicting definitions.
+    upstream: add some cautionary text about % token expansion and
     
-    We tried working around this (on OpenSSL <1.1 you could define
-    OPENSSL_NO_SHA, NetBSD had USE_LIBC_SHA2, various #define hacks) with
-    varying levels of success.  Since OpenSSL >=1.1 removed OPENSSL_NO_SHA
-    and including most OpenSSL headers would bring sha.h in, even if it
-    wasn't used directly this was a constant hassle.
+    shell metacharacters; based on report from vinci AT protonmail.ch
     
-    Admit defeat and use OpenSSL's SHA256 unless we aren't using OpenSSL at
-    all.  ok djm@
-
-commit 36cdb5dbf55c99c0faad06066f56a7c341258c1f
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 27 10:29:44 2023 +1000
-
-    Retire dfly58 test VM.  Add dfly64.
+    OpenBSD-Commit-ID: aa1450a54fcee2f153ef70368d90edb1e7019113
 
-commit 2d34205dab08ede9b0676efa57647fc49e6decbe
+commit 60ec3d54fd1ebfe2dda75893fa1e870b8dffbb0d
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 26 23:06:00 2023 +0000
+Date:   Tue Oct 3 23:56:10 2023 +0000
 
-    upstream: make ssh -f (fork after authentication) work properly in
-    
-    multiplexed cases (inc. ControlPersist). bz3589 bz3589 Based on patches by
-    Peter Chubb; ok dtucker@
+    upstream: fix link to agent draft; spotted by Jann Horn
     
-    OpenBSD-Commit-ID: a7a2976a54b93e6767dc846b85647e6ec26969ac
+    OpenBSD-Commit-ID: ff5bda21a83ec013db683e282256a85201d2dc4b
 
-commit 076aeda86a7ee9be8fd2f0181ec7b9729a6ceb37
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Sun Jul 23 20:04:45 2023 +0000
+commit 12e2d4b13f6f63ce2de13cbfcc9e4d0d4b4ab231
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Oct 4 10:54:04 2023 +1100
 
-    upstream: man page typos; ok jmc@
+    use portable provider allowlist path in manpage
     
-    OpenBSD-Commit-ID: e6ddfef94b0eb867ad88abe07cedc8ed581c07f0
+    spotted by Jann Horn
 
-commit 135e7d5fe31f700e6dfc61ce914970c5ee7175ba
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Thu Jul 20 05:43:39 2023 +0000
+commit 6c2c6ffde75df95fd838039850d3dd3d84956d87
+Author: deraadt@openbsd.org <deraadt@openbsd.org>
+Date:   Tue Sep 19 20:37:07 2023 +0000
 
-    upstream: tweak the allow-remote-pkcs11 text;
+    upstream: typo; from Jim Spath
     
-    OpenBSD-Commit-ID: bc965460a89edf76865b7279b45cf9cbdebd558a
+    OpenBSD-Commit-ID: 2f5fba917b5d4fcf93d9e0b0756c7f63189e228e
 
-commit 5f83342b61d1f76c141de608ed2bd293990416bd
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 25 13:00:22 2023 +1000
+commit b6b49130a0089b297245ee39e769231d7c763014
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sun Sep 10 23:12:32 2023 +0000
 
-    Handle a couple more OpenSSL no-ecc cases.
+    upstream: rename remote_glob() -> sftp_glob() to match other API
     
-    ok djm@
+    OpenBSD-Commit-ID: d9dfb3708d824ec02970a84d96cf5937e0887229
 
-commit edc2ef4e418e514c99701451fae4428ec04ce538
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Jul 20 12:53:44 2023 +1000
+commit 21b79af6c8d2357c822c84cef3fbdb8001ed263b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sun Sep 10 03:51:55 2023 +0000
 
-    depend
+    upstream: typo in comment
+    
+    OpenBSD-Commit-ID: 69285e0ce962a7c6b0ab5f17a293c60a0a360a18
 
-commit 51fda734e0d3c2df256fc03e8b060c4305be6e59
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Jul 20 12:53:21 2023 +1000
+commit 41232d25532b4d2ef6c5db62efc0cf50a79d26ca
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Sep 10 15:45:38 2023 +1000
 
-    Bring back OPENSSL_HAS_ECC to ssh-pkcs11-client
+    Use zero-call-used-regs=used with Apple compilers.
+    
+    Apple's versions of clang have version numbers that do not match the
+    corresponding upstream clang versions.  Unfortunately, they do still
+    have the clang-15 zero-call-used-regs=all bug, so for now use the value
+    that doesn't result in segfaults.  We could allowlist future versions
+    that are known to work.  bz#3584 (and probably also our github CI
+    failures).
 
-commit 099cdf59ce1e72f55d421c8445bf6321b3004755
+commit 90ccc5918ea505bf156c31148b6b59a1bf5d6dc6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 19 14:03:45 2023 +0000
+Date:   Sun Sep 10 03:25:53 2023 +0000
 
-    upstream: Separate ssh-pkcs11-helpers for each p11 module
-    
-    Make ssh-pkcs11-client start an independent helper for each provider,
-    providing better isolation between modules and reliability if a single
-    module misbehaves.
-    
-    This also implements reference counting of PKCS#11-hosted keys,
-    allowing ssh-pkcs11-helper subprocesses to be automatically reaped
-    when no remaining keys reference them. This fixes some bugs we have
-    that make PKCS11 keys unusable after they have been deleted, e.g.
-    https://bugzilla.mindrot.org/show_bug.cgi?id=3125
+    upstream: randomise keystroke obfuscation intervals and average
     
-    ok markus@
+    interval rate. ok dtucker@
     
-    OpenBSD-Commit-ID: 0ce188b14fe271ab0568f4500070d96c5657244e
+    OpenBSD-Commit-ID: 05f61d051ab418fcfc4857ff306e420037502382
 
-commit 29ef8a04866ca14688d5b7fed7b8b9deab851f77
+commit bd1b9e52f5fa94d87223c90905c5fdc1a7c32aa6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 19 14:02:27 2023 +0000
+Date:   Fri Sep 8 06:34:24 2023 +0000
 
-    upstream: Ensure FIDO/PKCS11 libraries contain expected symbols
-    
-    This checks via nlist(3) that candidate provider libraries contain one
-    of the symbols that we will require prior to dlopen(), which can cause
-    a number of side effects, including execution of constructors.
+    upstream: fix sizeof(*ptr) instead sizeof(ptr) in realloc (pointer here
     
-    Feedback deraadt; ok markus
+    is char**, so harmless); spotted in CID 416964
     
-    OpenBSD-Commit-ID: 1508a5fbd74e329e69a55b56c453c292029aefbe
+    OpenBSD-Commit-ID: c61caa4a5a667ee20bb1042098861e6c72c69002
 
-commit 1f2731f5d7a8f8a8385c6031667ed29072c0d92a
+commit c4f966482983e18601eec70a1563115de836616f
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 19 13:56:33 2023 +0000
+Date:   Fri Sep 8 06:10:57 2023 +0000
 
-    upstream: Disallow remote addition of FIDO/PKCS11 provider
+    upstream: regress test recursive remote-remote directories copies where
     
-    libraries to ssh-agent by default.
+    the directory contains a symlink to another directory.
     
-    The old behaviour of allowing remote clients from loading providers
-    can be restored using `ssh-agent -O allow-remote-pkcs11`.
+    also remove errant `set -x` that snuck in at some point
     
-    Detection of local/remote clients requires a ssh(1) that supports
-    the `session-bind@openssh.com` extension. Forwarding access to a
-    ssh-agent socket using non-OpenSSH tools may circumvent this control.
+    OpenBSD-Regress-ID: 1c94a48bdbd633ef2285954ee257725cd7bc456f
+
+commit 5e1dfe5014ebc194641678303e22ab3bba15f4e5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Sep 8 06:10:02 2023 +0000
+
+    upstream: fix recursive remote-remote copies of directories that
     
-    ok markus@
+    contain symlinks to other directories (similar to bz3611)
     
-    OpenBSD-Commit-ID: 4c2bdf79b214ae7e60cc8c39a45501344fa7bd7c
+    OpenBSD-Commit-ID: 7e19d2ae09b4f941bf8eecc3955c9120171da37f
 
-commit 892506b13654301f69f9545f48213fc210e5c5cc
+commit 7c0ce2bf98b303b6ad91493ee3247d96c18ba1f6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 19 13:55:53 2023 +0000
+Date:   Fri Sep 8 05:50:57 2023 +0000
 
-    upstream: terminate process if requested to load a PKCS#11 provider
+    upstream: regress test for recursive copies of directories containing
     
-    that isn't a PKCS#11 provider; from / ok markus@
+    symlinks to other directories. bz3611, ok dtucker@
     
-    OpenBSD-Commit-ID: 39532cf18b115881bb4cfaee32084497aadfa05c
+    OpenBSD-Regress-ID: eaa4c29cc5cddff4e72a16bcce14aeb1ecfc94b9
 
-commit f3f56df8ec476b2de6cbdbdfdb77a2a61087829d
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jul 19 12:07:18 2023 +1000
-
-    agent_fuzz doesn't want stdint.h conditionalised
-
-commit 750911fd31d307a767cc86e3bfa90bbbb77b1a25
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Jul 18 15:41:12 2023 +1000
+commit 2de990142a83bf60ef694378b8598706bc654b08
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Sep 8 05:56:13 2023 +0000
 
-    conditionalise stdint.h inclusion on HAVE_STDINT_H
+    upstream: the sftp code was one of my first contributions to
     
-    fixes build on AIX5 at least
+    OpenSSH and it shows - the function names are terrible.
+    
+    Rename do_blah() to sftp_blah() to make them less so.
+    
+    Completely mechanical except for sftp_stat() and sftp_lstat() which
+    change from returning a pointer to a static variable (error-prone) to
+    taking a pointer to a caller-provided receiver.
+    
+    OpenBSD-Commit-ID: eb54d6a72d0bbba4d623e2175cf5cc4c75dc2ba4
 
-commit ff047504fa6e008c4092f8929881816b8993bea0
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Jul 18 15:30:45 2023 +1000
+commit 249d8bd0472b53e3a2a0e138b4c030a31e83346a
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Sep 8 05:50:12 2023 +0000
 
-    conditionalise match localnetwork on ifaddrs.h
+    upstream: fix scp in SFTP mode recursive upload and download of
     
-    Fixes build breakage on platforms that lack getifaddrs()
+    directories that contain symlinks to other directories. In scp mode, the
+    links would be followed, but in SFTP mode they were not. bz3611, ok dtucker@
+    
+    OpenBSD-Commit-ID: 9760fda668eaa94a992250d7670dfbc62a45197c
 
-commit b87b03282e466ca2927954ce93f5dbf0bfdc68f6
+commit 0e1f4401c466fa4fdaea81b6dadc8dd1fc4cf0af
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 06:16:33 2023 +0000
+Date:   Wed Sep 6 23:36:09 2023 +0000
 
-    upstream: missing match localnetwork negation check
+    upstream: regression test for override of subsystem in match blocks
     
-    OpenBSD-Commit-ID: 9a08ed8dae27d3f38cf280f1b28d4e0ff41a737a
+    OpenBSD-Regress-ID: 5f8135da3bfda71067084c048d717b0e8793e87c
 
-commit 6d6e185ba29ef4274164b77eab4dc763907f8821
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Mon Jul 17 05:41:53 2023 +0000
+commit 8a1450c62035e834d8a79a5d0d1c904236f9dcfe
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Sep 6 23:35:35 2023 +0000
 
-    upstream: - add -P to usage() - sync the arg name to -J in usage()
+    upstream: allow override of Sybsystem directives in sshd Match
     
-    with that in ssh.1 - reformat usage() to match what "man ssh" does on 80width
+    blocks
     
-    OpenBSD-Commit-ID: 5235dd7aa42e5bf90ae54579d519f92fc107036e
+    OpenBSD-Commit-ID: 3911d18a826a2d2fe7e4519075cf3e57af439722
 
-commit f1a9898283a0638667b587ee4a950afd61ab51b0
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Mon Jul 17 05:38:10 2023 +0000
+commit 6e52826e2a74d077147a82ead8d4fbd5b54f4e3b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Sep 6 23:26:37 2023 +0000
 
-    upstream: -P before -p in SYNOPSIS;
+    upstream: allocate the subsystems array as necessary and remove the
     
-    OpenBSD-Commit-ID: 535f5257c779e26c6a662a038d241b017f8cab7c
-
-commit eef4d7e873568e1c84c36bb4034e2c3378250a61
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Mon Jul 17 05:36:14 2023 +0000
-
-    upstream: configuation -> configuration
+    fixed limit of subsystems. Saves a few kb of memory in the server and makes
+    it more like the other options.
     
-    OpenBSD-Commit-ID: 4776ced33b780f1db0b2902faec99312f26a726b
+    OpenBSD-Commit-ID: e683dfca6bdcbc3cc339bb6c6517c0c4736a547f
 
-commit dc1dbe94cf6532bd546a3373ad436404f8850e5f
+commit e19069c9fac4c111d6496b19c7f7db43b4f07b4f
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 05:26:38 2023 +0000
+Date:   Wed Sep 6 23:23:53 2023 +0000
 
-    upstream: move other RCSIDs to before their respective license blocks
+    upstream: preserve quoting of Subsystem commands and arguments.
     
-    too no code change
+    This may change behaviour of exotic configurations, but the most common
+    subsystem configuration (sftp-server) is unlikely to be affected.
     
-    OpenBSD-Commit-ID: ef5bf46b57726e4260a63b032b0b5ac3b4fe9cd4
+    OpenBSD-Commit-ID: 8ffa296aeca981de5b0945242ce75aa6dee479bf
 
-commit ebe11044681caff78834ca6b78311ad19c1860b8
+commit 52dfe3c72d98503d8b7c6f64fc7e19d685636c0b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 05:22:30 2023 +0000
+Date:   Wed Sep 6 23:21:36 2023 +0000
 
-    upstream: Move RCSID to before license block and away from #includes,
+    upstream: downgrade duplicate Subsystem directives from being a
     
-    where it caused merge conflict in -portable for each commit :(
+    fatal error to being a debug message to match behaviour with just about all
+    other directives.
     
-    OpenBSD-Commit-ID: 756ebac963df3245258b962e88150ebab9d5fc20
+    OpenBSD-Commit-ID: fc90ed2cc0c18d4eb8e33d2c5e98d25f282588ce
 
-commit 05c08e5f628de3ecf6f7ea20947735bcfa3201e0
+commit 1ee0a16e07b6f0847ff463d7b5221c4bf1876e25
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 05:20:15 2023 +0000
+Date:   Wed Sep 6 23:18:15 2023 +0000
 
-    upstream: return SSH_ERR_KRL_BAD_MAGIC when a KRL doesn't contain a
+    upstream: handle cr+lf (instead of just cr) in sshsig signature
     
-    valid magic number and not SSH_ERR_MESSAGE_INCOMPLETE; the former is needed
-    to fall back to text revocation lists in some cases; fixes t-cert-hostkey.
+    files
     
-    OpenBSD-Commit-ID: 5c670a6c0f027e99b7774ef29f18ba088549c7e1
-
-commit c6fad2c3d19b74f0bd0af1ef040fc74f3a1d9ebb
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Jul 17 14:56:14 2023 +1000
-
-    avoid AF_LINK on platforms that don't define it
+    OpenBSD-Commit-ID: 647460a212b916540016d066568816507375fd7f
 
-commit 919bc3d3b712c920de1ae6be5ac6561c98886d7e
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 04:08:31 2023 +0000
+commit e1c284d60a928bcdd60bc575c6f9604663502770
+Author: job@openbsd.org <job@openbsd.org>
+Date:   Mon Sep 4 10:29:58 2023 +0000
 
-    upstream: Add support for configuration tags to ssh(1).
+    upstream: Generate Ed25519 keys when invoked without arguments
     
-    This adds a ssh_config(5) "Tag" directive and corresponding
-    "Match tag" predicate that may be used to select blocks of
-    configuration similar to the pf.conf(5) keywords of the same
-    name.
+    Ed25519 public keys are very convenient due to their small size.
+    OpenSSH has supported Ed25519 since version 6.5 (January 2014).
     
-    ok markus
+    OK djm@ markus@ sthen@ deraadt@
     
-    OpenBSD-Commit-ID: dc08358e70e702b59ac3e591827e5a96141b06a3
+    OpenBSD-Commit-ID: f498beaad19c8cdcc357381a60df4a9c69858b3f
 
-commit 3071d85a47061c1bdaf11a0ac233b501ecba862c
+commit 694150ad92765574ff82a18f4e86322bd3231e68
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 04:04:36 2023 +0000
+Date:   Mon Sep 4 00:08:14 2023 +0000
 
-    upstream: add a "match localnetwork" predicate.
+    upstream: trigger keystroke timing obfucation only if the channels
     
-    This allows matching on the addresses of available network interfaces
-    and may be used to vary the effective client configuration based on
-    network location (e.g. to use a ProxyJump when not on a particular
-    network).
+    layer enqueud some data in the last poll() cycle; this avoids triggering the
+    obfuscatior for non-channels data like ClientAlive probes and also fixes a
+    related problem were the obfucations would be triggered on fully quiescent
+    connections.
     
-    ok markus@
+    Based on / tested by naddy@
     
-    OpenBSD-Commit-ID: cffb6ff9a3803abfc52b5cad0aa190c5e424c139
+    OpenBSD-Commit-ID: d98f32dc62d7663ff4660e4556e184032a0db123
 
-commit beec17bb311365b75a0a5941418d4b96df7d7888
+commit b5fd97896b59a3a46245cf438cc8b16c795d9f74
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 04:01:10 2023 +0000
+Date:   Mon Sep 4 00:04:02 2023 +0000
 
-    upstream: remove vestigal support for KRL signatures
-    
-    When the KRL format was originally defined, it included support for
-    signing of KRL objects. However, the code to sign KRLs and verify KRL
-    signatues was never completed in OpenSSH.
-    
-    Now, some years later, we have SSHSIG support in ssh-keygen that is
-    more general, well tested and actually works. So this removes the
-    semi-finished KRL signing/verification support from OpenSSH and
-    refactors the remaining code to realise the benefit - primarily, we
-    no longer need to perform multiple parsing passes over KRL objects.
+    upstream: avoid bogus "obfuscate_keystroke_timing: stopping ..."
     
-    ok markus@
+    debug messages when keystroke timing obfuscation was never started; spotted
+    by naddy@
     
-    OpenBSD-Commit-ID: 517437bab3d8180f695c775410c052340e038804
+    OpenBSD-Commit-ID: 5c270d35f7d2974db5c1646e9c64188f9393be31
 
-commit 449566f64c21b4578d5c0c431badd0328adc53ed
+commit ccf7d913db34e49b7a6db1b8331bd402004c840d
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 17 03:57:21 2023 +0000
+Date:   Mon Sep 4 00:01:46 2023 +0000
 
-    upstream: Support for KRL extensions.
-    
-    This defines wire formats for optional KRL extensions and implements
-    parsing of the new submessages. No actual extensions are supported at
-    this point.
+    upstream: make channel_output_poll() return a flag indicating
     
-    ok markus
+    whether channel data was enqueued. Will be used to improve keystroke timing
+    obfuscation. Problem spotted by / tested by naddy@
     
-    OpenBSD-Commit-ID: ae2fcde9a22a9ba7f765bd4f36b3f5901d8c3fa7
+    OpenBSD-Commit-ID: f9776c7b0065ba7c3bbe50431fd3b629f44314d0
 
-commit 18ea857770e84825a3a6238bb37f54864487b59f
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jul 14 07:44:21 2023 +0000
+commit 43254b326ac6e2131dbd750f9464dc62c14bd5a7
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sun Sep 3 23:59:32 2023 +0000
 
-    upstream: Include stdint.h for SIZE_MAX. Fixes OPENSSL=no build.
+    upstream: set interactive mode for ControlPersist sessions if they
     
-    OpenBSD-Commit-ID: e7c31034a5434f2ead3579b13a7892960651e6b0
+    originally requested a tty; enables keystroke timing obfuscation for most
+    ControlPersist sessions. Spotted by naddy@
+    
+    OpenBSD-Commit-ID: 72783a26254202e2f3f41a2818a19956fe49a772
 
-commit 20b768fcd13effe0f2d3619661b6c8592c773553
+commit ff3eda68ceb2e2bb8f48e3faceb96076c3e85c20
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 14 17:07:32 2023 +1000
-
-    Fix typo in declaration of nmesg.
-
-commit 4b94d09542e36ebde2eb9ad89bc68431609932de
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jul 14 15:34:47 2023 +1000
+Date:   Thu Aug 31 23:02:35 2023 +1000
 
-    portable-specific int overflow defence-in-depth
+    Set LLONG_MAX for C89 test.
     
-    These too are unreachable, but we want the code to be safe regardless of
-    context. Reported by Yair Mizrahi @ JFrog
+    If we don't have LLONG_MAX, configure will figure out that it can get it
+    by setting -std=gnu99, at which point we won't be testing C89 any more.
+    To avoid this, feed it in via CFLAGS.
 
-commit 2ee48adb9fc8692e8d6ac679dcc9f35e89ad68f0
+commit f98031773db361424d59e3301aa92aacf423d920
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jul 14 05:31:44 2023 +0000
+Date:   Tue Aug 29 02:50:10 2023 +0000
 
-    upstream: add defence-in-depth checks for some unreachable integer
-    
-    overflows reported by Yair Mizrahi @ JFrog; feedback/ok millert@
+    upstream: make PerSourceMaxStartups first-match-wins; ok dtucker@
     
-    OpenBSD-Commit-ID: 52af085f4e7ef9f9d8423d8c1840a6a88bda90bd
+    OpenBSD-Commit-ID: dac0c24cb709e3c595b8b4f422a0355dc5a3b4e7
 
-commit 4b43bc358ae6f6b19a973679246dc5172f6ac41b
+commit cfa66857db90cd908de131e0041a50ffc17c7df8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jul 10 04:51:26 2023 +0000
+Date:   Mon Aug 28 09:52:09 2023 +0000
 
-    upstream: misplaced debug message
+    upstream: descriptive text shouldn't be under .Cm
     
-    OpenBSD-Commit-ID: d0f12af0a5067a756aa707bc39a83fa6f58bf7e5
+    OpenBSD-Commit-ID: b1afaeb456a52bc8a58f4f9f8b2f9fa8f6bf651b
 
-commit 8c7203bcee4c4f98a22487b4631fe068b992099b
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jul 12 11:41:19 2023 +1000
+commit 01dbf3d46651b7d6ddf5e45d233839bbfffaeaec
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 28 09:48:11 2023 +0000
 
-    replace deprecate selinux matchpathcon function
+    upstream: limit artificial login delay to a reasonable maximum (5s)
     
-    This function is apparently deprecated. Documentation on what is the
-    supposed replacement is is non-existent, so this follows the approach
-    glibc used https://sourceware.org/git/?p=glibc.git;a=patch;h=f278835f59
+    and don't delay at all for the "none" authentication mechanism. Patch by
+    Dmitry Belyavskiy in bz3602 with polish/ok dtucker@
     
-    ok dtucker@
+    OpenBSD-Commit-ID: 85b364676dd84cf1de0e98fc2fbdcb1a844ce515
 
-commit 7e8800f5d701efffa39ccb63ca1e095ea777c31a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jul 6 22:17:59 2023 +0000
+commit 528da5b9d7c5da01ed7a73ff21c722e1b5326006
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Mon Aug 28 05:32:28 2023 +0000
 
-    upstream: minleft and maxsign are u_int so cast appropriately. Prompted
-    
-    by github PR#410, ok deraadt.
+    upstream: add spacing for punctuation when macro args;
     
-    OpenBSD-Commit-ID: 0514cd51db3ec60239966622a0d3495b15406ddd
+    OpenBSD-Commit-ID: e80343c16ce0420b2aec98701527cf90371bd0db
 
-commit 94842bfe9b09fc93189c6ed0dc9bbebc1d44a426
-Author: dlg@openbsd.org <dlg@openbsd.org>
-Date:   Tue Jul 4 03:59:21 2023 +0000
+commit 3867361ca691d0956ef7d5fb8181cf554a91d84a
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 28 04:06:52 2023 +0000
 
-    upstream: add support for unix domain sockets to ssh -W
+    upstream: explicit long long type in timing calculations (doesn't
     
-    ok djm@ dtucker@
+    matter, since the range is pre-clamped)
     
-    OpenBSD-Commit-ID: 3e6d47567b895c7c28855c7bd614e106c987a6d8
+    OpenBSD-Commit-ID: f786ed902d04a5b8ecc581d068fea1a79aa772de
 
-commit a95fc5eed09a0238fb127b6c50e8498432b79dae
-Author: David Seifert <soap@gentoo.org>
-Date:   Fri May 12 14:06:01 2023 +0200
+commit 7603ba71264e7fa938325c37eca993e2fa61272f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 28 03:31:16 2023 +0000
 
-    gss-serv.c: `MAXHOSTNAMELEN` -> `HOST_NAME_MAX`
-    
-    `MAXHOSTNAMELEN` is not defined in POSIX, which breaks on musl:
-    https://pubs.opengroup.org/onlinepubs/9699919799/functions/gethostname.html
+    upstream: Add keystroke timing obfuscation to the client.
     
-    Bug: https://bugs.gentoo.org/834044
-
-commit 8a6cd08850f576e7527c52a1b086cae82fab290e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jun 23 09:49:02 2023 +1000
-
-    Update runner OS version for hardenedmalloc test.
+    This attempts to hide inter-keystroke timings by sending interactive
+    traffic at fixed intervals (default: every 20ms) when there is only a
+    small amount of data being sent. It also sends fake "chaff" keystrokes
+    for a random interval after the last real keystroke. These are
+    controlled by a new ssh_config ObscureKeystrokeTiming keyword/
     
-    Hardenedmalloc dropped support for "legacy glibc" versions in their
-    64dad0a69 so use a newer Ubuntu version for the runner for that test.
-
-commit cfca6f17e64baed6822bb927ed9f372ce64d9c5b
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Jun 22 15:04:03 2023 +1000
-
-    handle sysconf(SC_OPEN_MAX) returning > INT_MAX;
+    feedback/ok markus@
     
-    bz3581; ok dtucker
+    OpenBSD-Commit-ID: 02231ddd4f442212820976068c34a36e3c1b15be
 
-commit c1c2ca1365b3f7b626683690bd2c68265f6d8ffd
+commit dce6d80d2ed3cad2c516082682d5f6ca877ef714
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jun 21 05:10:26 2023 +0000
+Date:   Mon Aug 28 03:28:43 2023 +0000
 
-    upstream: better validate CASignatureAlgorithms in ssh_config and
-    
-    sshd_config.
+    upstream: Introduce a transport-level ping facility
     
-    Previously this directive would accept certificate algorithm names, but
-    these were unusable in practice as OpenSSH does not support CA chains.
+    This adds a pair of SSH transport protocol messages SSH2_MSG_PING/PONG
+    to implement a ping capability. These messages use numbers in the "local
+    extensions" number space and are advertised using a "ping@openssh.com"
+    ext-info message with a string version number of "0".
     
-    part of bz3577; ok dtucker@
+    ok markus@
     
-    OpenBSD-Commit-ID: a992d410c8a78ec982701bc3f91043dbdb359912
+    OpenBSD-Commit-ID: b6b3c4cb2084c62f85a8dc67cf74954015eb547f
 
-commit 4e73cd0f4ab3e5b576c56cac9732da62c8fc0565
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jun 21 05:08:32 2023 +0000
+commit d2d247938b38b928f8a6e1a47a330c5584d3a358
+Author: tobhe@openbsd.org <tobhe@openbsd.org>
+Date:   Mon Aug 21 21:16:18 2023 +0000
 
-    upstream: make `ssh -Q CASignatureAlgorithms` only list signature
-    
-    algorithms that are valid for CA signing. Previous behaviour was to list all
-    signing algorithms, including certificate algorithms (OpenSSH certificates do
-    not support CA chains). part of bz3577; ok dtucker@
+    upstream: Log errors in kex_exchange_identification() with level
     
-    OpenBSD-Commit-ID: 99c2b072dbac0f44fd1f2269e3ff6c1b5d7d3e59
-
-commit a69062f1695ac9c3c3dea29d3044c72aaa6af0ea
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jun 21 05:06:04 2023 +0000
-
-    upstream: handle rlimits > INT_MAX (rlim_t is u64); ok dtucker
+    verbose instead of error to reduce preauth log spam. All of those get logged
+    with a more generic error message by sshpkt_fatal().
     
-    bz3581
+    feedback from sthen@
+    ok djm@
     
-    OpenBSD-Commit-ID: 31cf59c041becc0e5ccb0a77106f812c4cd1cd74
+    OpenBSD-Commit-ID: bd47dab4695b134a44c379f0e9a39eed33047809
 
-commit 8d33f2aa6bb895a7f85a47189913639086347b75
+commit 9d7193a8359639801193ad661a59d1ae4dc3d302
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jun 20 23:59:33 2023 +0000
+Date:   Mon Aug 21 04:59:54 2023 +0000
 
-    upstream: prepare for support for connecting to unix domain sockets
+    upstream: correct math for ClientAliveInterval that caused the
     
-    using ssh -W by explicitly decoding PORT_STREAMLOCAL (a negative number) from
-    the u32 that's passed over the multiplexing socket; previously code would
-    just cast, which is UB.
+    probes to be sent less frequently than configured; from Dawid Majchrzak
     
-    OpenBSD-Commit-ID: e5ac5f40d354096c51e8c118a5c1b2d2b7a31384
+    OpenBSD-Commit-ID: 641153e7c05117436ddfc58267aa267ca8b80038
 
-commit b4ac435b4e67f8eb5932d8f59eb5b3cf7dc38df0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jun 20 00:05:09 2023 +0000
+commit 3c6ab63b383b0b7630da175941e01de9db32a256
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 25 14:48:02 2023 +1000
 
-    upstream: reset comment=NULL for each key in do_fingerprint();
-    
-    fixes "no comment" not showing on when running `ssh-keygen -l` on multiple
-    keys where one has a comment and other following keys do not. Patch from
-    Markus Kuhn via GHPR407, bz3580
+    Include Portable version in sshd version string.
     
-    OpenBSD-Commit-ID: 3cce84456fdcd67dc6b84e369f92c6686d111d9b
+    bz#3608, ok djm@
 
-commit b53a809a549dcd4fbde554c6aa283e597b15ea33
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Mon Jun 5 13:24:36 2023 +0000
+commit 17fa6cd10a26e193bb6f65d21264d2fe553bcd87
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Aug 21 19:47:58 2023 +1000
 
-    upstream: Store timeouts as int, not u_int as they are limited to
-    
-    INT_MAX. Fixes sign compare warnings systems with 32-bit time_t due to type
-    promotion.  OK djm@
+    obsd-arm64 host is real hardware...
     
-    OpenBSD-Commit-ID: 48081e9ad35705c5f1705711704a4c2ff94e87b7
+    so put in the correct config location.
 
-commit 2709809fd616a0991dc18e3a58dea10fb383c3f0
-Author: Philip Hands <phil@hands.com>
-Date:   Wed May 24 19:41:14 2023 +0200
+commit 598ca75c85acaaacee5ef954251e489cc20d7be9
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Aug 21 18:38:36 2023 +1000
 
-    fixup! if -s & -p specified, mention 'sftp -P' on
-    
-    success
-    
-    SSH-Copy-ID-Upstream: 32686e7c65b4fa2846e474d3315102dfa0f043b0
+    Add OpenBSD ARM64 test host.
 
-commit 204e0bf05161b7641500d7ab266c21217412379f
+commit 1acac79bfbe207e8db639e8043524962037c8feb
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Aug 3 21:25:48 2021 +1000
+Date:   Mon Aug 21 18:05:26 2023 +1000
 
-    Make ssh-copy-id(1) consistent with OpenSSH.
-    
-    This makes the ssh-copy-id man page more consistent with the rest of the
-    OpenSSH man pages:
-    - new sentence, new line
-    - no sentences >80
-    - N.B. -> NB
-    - zap unused .Pp
-    - zap trailing whitespace
-    
-    Report from Debian via mindrot bz#3331, diff from jmc at openbsd.org.
-    
-    SSH-Copy-ID-Upstream: d8974cfb6242316460ed22a1ccc662800a50c5d3
+    Add test for zlib development branch.
 
-commit 9de79df66d1430d290fab670bb4b18612875e518
-Author: Philip Hands <phil@hands.com>
-Date:   Wed May 24 11:45:43 2023 +0200
+commit 84efebf352fc700e9040c8065707c63caedd36a3
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 21 04:36:46 2023 +0000
 
-    if -s & -p specified, mention 'sftp -P' on success
-    
-    This was inspired by this:
-     https://github.com/openssh/openssh-portable/pull/321
-    but I thought that it was better to not do the sed patching.
-    
-    BTW the reason one can get away with using $SSH_OPTS throughout, despite
-    the lowercase -p in there, even if sftp is in use, is that the sftp call
-    is using the already-established ssh master connection, so the port was
-    passed to the earlier ssh.
+    upstream: want stdlib.h for free(3)
     
-    SSH-Copy-ID-Upstream: 1c124d9bfafdbe28a00b683367ebf5750ce12eb2
+    OpenBSD-Commit-ID: 743af3c6e3ce5e6cecd051668f0327a01f44af29
 
-commit 801cda54c00e0f4e7d89345a90874c8d05dc233a
-Author: Philip Hands <phil@hands.com>
-Date:   Tue May 23 23:07:11 2023 +0200
+commit cb4ed12ffc332d1f72d054ed92655b5f1c38f621
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Aug 19 07:39:08 2023 +1000
 
-    drop whitespace
+    Fix zlib version check for 1.3 and future version.
     
-    SSH-Copy-ID-Upstream: e604fae1cdee35c18055d35dcec530cf12ef00ad
+    bz#3604.
 
-commit 288482f53613f3e74544eb92deeb24f7c7f1f371
-Author: Philip Hands <phil@hands.com>
-Date:   Tue May 23 20:52:13 2023 +0200
+commit 25b75e21f16bccdaa472ea1889b293c9bd51a87b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Aug 14 11:10:08 2023 +1000
 
-    make -x also apply to the target script
-    
-    SSH-Copy-ID-Upstream: 3c4214704f427bd0654adf9b0fc079253db21cf4
+    Add 9.4 branch to CI status page.
 
-commit b79e7b88ed44f0e4339f0ff35c96c78a92175a8d
-Author: Philip Hands <phil@hands.com>
-Date:   Tue May 23 16:46:42 2023 +0200
+commit 803e22eabd3ba75485eedd8b7b44d6ace79f2052
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 18 01:37:41 2023 +0000
 
-    add -t option to specify the target path
-    
-    Allow the default target path (.ssh/authorized_files) to be over-riden
-    
-    This was inspired by this MR from Panagiotis Cheilaris <philaris@cs.ntua.gr>
+    upstream: fix regression in OpenSSH 9.4 (mux.c r1.99) that caused
     
-     https://gitlab.com/phil_hands/ssh-copy-id/-/merge_requests/8
+    multiplexed sessions to ignore SIGINT under some circumstances. Reported by /
+    feedback naddy@, ok dtucker@
     
-    SSH-Copy-ID-Upstream: a942a0e076874adb6d8b2f0fb76d6c7918190fcd
+    OpenBSD-Commit-ID: 4d5c6c894664f50149153fd4764f21f43e7d7e5a
 
-commit 914f4ad138714c471ba72fb6d5496b6235320edd
-Author: Carlos Rodríguez Gili <carlos.rodriguez-gili@upc.edu>
-Date:   Tue Apr 20 19:23:57 2021 +0200
+commit e706bca324a70f68dadfd0ec69edfdd486eed23a
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Aug 16 16:14:11 2023 +0000
 
-    Fix test error for /bin/sh on Solaris 10 and older
-    
-    On Solaris 10 and older targets /bin/sh is not POSIX-compliant.
-    Test -z `...` fails with error 'sh: test: argument expected'.
-    Using quotes around backticks fixes this and doesn't break
-    POSIX compatibility.
+    upstream: defence-in-depth MaxAuthTries check in monitor; ok markus
     
-    SSH-Copy-ID-Upstream: 98394072a3f985b2650c1e8eab2fef84e38cc065
+    OpenBSD-Commit-ID: 65a4225dc708e2dae71315adf93677edace46c21
 
-commit bd382dca316c721aed1e45edcf4c4e0f6374afb0
-Author: Jakub Jelen <jjelen@redhat.com>
-Date:   Tue Mar 2 21:34:05 2021 +0000
+commit d1ab7eb90474df656d5e9935bae6df0bd000d343
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 14 03:37:00 2023 +0000
 
-    Remove outdated comment
-    
-    The commit b068122 removed the code dropping the trailing colon, but the comment stayed leaving the code confusing for future readers
+    upstream: add message number of SSH2_MSG_NEWCOMPRESS defined in RFC8308
     
-    SSH-Copy-ID-Upstream: 930d39f238117cd53810240ec989d0356aa1c1f6
+    OpenBSD-Commit-ID: 6c984171c96ed67effd7b5092f3d3975d55d6028
 
-commit bdcaf7939029433635d63aade8f9ac762aca2bbe
+commit fa8da52934cb7dff6f660a143276bdb28bb9bbe1
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed May 10 18:50:46 2023 +1000
+Date:   Sun Aug 13 15:01:27 2023 +1000
 
-    Special case OpenWrt instead of Dropbear.
-    
-    OpenWrt overrides the location of authorized_keys for root.  Currently we
-    assume that all Dropbear installations behave this way, which is not the
-    case.  Check for OpenWrt and root user before using that location instead
-    of assuming that for all Dropbear servers.  Prompted by Github PR#250.
-    
-    SSH-Copy-ID-Upstream: 0e1f5d443a9967483c33945793107ae3f3e4af2d
-
-commit cf84498f67abe93f813a296167b406a0db7b288e
-Author: Philip Hands <phil@hands.com>
-Date:   Thu May 18 18:20:55 2023 +0200
-
-    ssh-copy-id: add -x option (for debugging)
-    
-    This option causes the ssh-copy-id to run with set -x
-    
-    SSH-Copy-ID-Upstream: a0ee367ea8c0a29c8b4515245e408d2d349e7844
-
-commit b4a1efdcb88f03394c08e7f68ed4e11676830002
-Author: Philip Hands <phil@hands.com>
-Date:   Thu May 18 17:14:41 2023 +0200
-
-    update copyright notices
-    
-    SSH-Copy-ID-Upstream: c284ed33b361814ea48ff68cbd01ca525b2bf117
+    Add obsd72 and obsd73 test targets.
 
-commit fcd78e31cdd45a7e69ccfe6d8a3b1037dc1de290
+commit f9f18006678d2eac8b0c5a5dddf17ab7c50d1e9f
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed May 24 23:01:06 2023 +0000
+Date:   Thu Aug 10 23:05:48 2023 +0000
 
-    upstream: fix AuthorizedPrincipalsCommand when AuthorizedKeysCommand
-    
-    appears previously in configuration. Reported by John Meyers in bz3574 ok
-    dtucker@
+    upstream: better debug logging of sessions' exit status
     
-    OpenBSD-Commit-ID: 1c92e4517284386703936e1d3abaa36cfacf1951
+    OpenBSD-Commit-ID: 82237567fcd4098797cbdd17efa6ade08e1a36b0
 
-commit 5ec5504f1d328d5bfa64280cd617c3efec4f78f3
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed May 10 10:04:20 2023 +0000
+commit a8c57bcb077f0cfdffcf9f23866bf73bb93e185c
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Thu Aug 10 14:37:32 2023 +0000
 
-    upstream: Remove unused prototypes for ssh1 RSA functions.
-    
-    From lengyijun via github PR#396.
+    upstream: drop a wayward comma, ok jmc@
     
-    OpenBSD-Commit-ID: 379a5afa8b7a0f3cba0c8a9bcceb4e5e33a5c1ef
-
-commit fbf362b3891ae4b36052d1b39f37fc618b41c476
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue May 9 19:26:56 2023 +1000
-
-    main(void) to prevent unused variable warning.
-
-commit baf854c8bb0a6d0af5c696c801e631a48dabbaba
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue May 9 19:25:45 2023 +1000
-
-    Remove warning pragma since clang doesn't like it.
+    OpenBSD-Commit-ID: 5c11fbb9592a29b37bbf36f66df50db9d38182c6
 
-commit 5fbb7a1349fbbb48ccb1b8cafff2c1854370d87d
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue May 9 17:13:33 2023 +1000
+commit e962f9b318a238db1becc53c2bf79dd3a49095b4
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Aug 10 11:10:22 2023 +1000
 
-    Suppress warning for snprintf truncation test.
+    depend
 
-commit 47742c513e4e045ecc985c6483fc5c8b050acda2
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue May 9 17:12:50 2023 +1000
+commit 0fcb60bf83130dfa428bc4422b3a3ac20fb528af
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Aug 10 11:05:42 2023 +1000
 
-    Update OpenSSL compat test for 3.x.
+    update versions in RPM specs
 
-commit 86ad25d455a2313126125540e61e0f9314283f88
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon May 8 20:23:08 2023 +1000
+commit d0cee4298491314f09afa1c4383a66d913150b26
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Aug 10 11:05:14 2023 +1000
 
-    Add macos13 PAM test target.
+    update version in README
 
-commit 77cca2c4b13bc6e5f389565583b6202b0d1bccc2
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon May 8 20:14:46 2023 +1000
+commit 78b4dc6684f4d35943b46b24ee645edfdb9974f5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Aug 10 01:01:07 2023 +0000
 
-    Skip agent-peereid test on macos13.
+    upstream: openssh-9.4
     
-    sudo -S nobody doesn't work on the github runners (probably a
-    permission issue) so skip that test.
+    OpenBSD-Commit-ID: 71fc1e01a4c4ea061b252bd399cda7be757e6e35
 
-commit b356b8e91678ea295bcf44df5248c3fbf499fdcf
+commit 58ca4f0aa8c4306ac0a629c9a85fb1efaf4ff092
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon May 8 20:14:28 2023 +1000
+Date:   Thu Aug 10 11:30:24 2023 +1000
 
-    Include config.guess in debug output.
+    Only include unistd.h once.
 
-commit b7afd8a4ecaca8afd3179b55e9db79c0ff210237
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon May 8 20:12:59 2023 +1000
+commit 3961ed02dc578517a9d2535128cff5c3a5460d28
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Aug 10 09:08:49 2023 +1000
 
-    Handle OpenSSL >=3 ABI compatibility.
-    
-    Beyond OpenSSL 3.0, the ABI compatibility guarantees are wider (only
-    major must match instead of major and minor in earlier versions).
-    bz#3548, ok djm@
+    wrap poll.h include in HAVE_POLL_H
 
-commit 0e9e2663eb2c6e9c3e10d15d70418312ae67e542
+commit e535fbe2af893046c28adfcd787c1fdbae36a24a
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon May 1 08:57:29 2023 +0000
+Date:   Fri Aug 4 06:32:40 2023 +0000
 
-    upstream: Import regenerated moduli.
+    upstream: Apply ConnectTimeout to multiplexing local socket
     
-    OpenBSD-Commit-ID: 3d5f811cfcaed8cc4a97e1db49ac61bdf118113c
+    connections.  If the multiplex socket exists but the connection times out,
+    ssh will fall back to a direct connection the same way it would if the socket
+    did not exist at all.  ok djm@
+    
+    OpenBSD-Commit-ID: 2fbe1a36d4a24b98531b2d298a6557c8285dc1b4
 
-commit d9687f49682e1e93383fc15ab2018850b2ef38c3
+commit 9d92e7b24848fcc605945f7c2e3460c7c31832ce
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon May 1 11:45:14 2023 +1000
+Date:   Thu Aug 3 19:35:33 2023 +1000
 
-    Add macos-13 test target.
+    Fix RNG seeding for OpenSSL w/out self seeding.
     
-    Also flatten OS list for clarity.
+    When sshd is built with an OpenSSL that does not self-seed, it would
+    fail in the preauth privsep process while handling a new connection.
+    Sanity checked by djm@
 
-commit aacfd6767497b8fa6d41ecdd3f8e265d1e9ef1f6
+commit f70010d9b0b3e7e95de8aa0b961e1d74362cfb5d
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Apr 30 22:54:22 2023 +0000
+Date:   Wed Aug 2 23:04:38 2023 +0000
 
-    upstream: adjust ftruncate() logic to handle servers that reorder
-    
-    requests.
-    
-    sftp/scp will ftruncate the destination file after a transfer completes,
-    to deal with the case where a longer destination file already existed.
-    We tracked the highest contiguous block transferred to deal with this
-    case, but our naive tracking doesn't deal with servers that reorder
-    requests - a misfeature strictly permitted by the protocol but seldom
-    implemented.
-    
-    Adjust the logic to ftruncate() at the highest absolute block received
-    when the transfer is successful. feedback deraadt@ ok markus@
+    upstream: CheckHostIP has defaulted to 'no' for a while; make the
     
-    prompted by https://github.com/openssh/openssh-portable/commit/9b733#commitcomment-110679778
+    commented- out config option match. From Ed Maste
     
-    OpenBSD-Commit-ID: 4af7fac75958ad8507b4fea58706f3ff0cfddb1b
+    OpenBSD-Commit-ID: e66e934c45a9077cb1d51fc4f8d3df4505db58d9
 
-commit c8eb3941758615c8284a48fff47872db926da63c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Apr 26 01:36:03 2023 +0000
+commit c88a8788f9865d02b986d00405b9f0be65ad0b5a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Aug 1 08:15:04 2023 +0000
 
-    upstream: Check for ProxyJump=none in CanonicalizeHostname logic.
-    
-    Previously ssh would incorrectly refuse to canonicalise the hostname
-    if ProxyJump was explicitly set to "none" when CanonicalizeHostname=yes
+    upstream: remove unnecessary if statement.
     
-    bz3567; ok dtucker
+    github PR#422 from eyalasulin999, ok djm@
     
-    OpenBSD-Commit-ID: 80a58e43c3a32f97361282f756ec8d3f37989efd
+    OpenBSD-Commit-ID: 2b6b0dde4407e039f58f86c8d2ff584a8205ea55
 
-commit ac383f3a5c6f529a2e8a5bc44af79a08c7da294e
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Wed Apr 12 14:22:04 2023 +0000
+commit 77b8b865cd5a8c79a47605c0c5b2bacf4692c4d5
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Jul 28 05:42:36 2023 +0000
 
-    upstream: remove duplicate signal.h include
+    upstream: %C is a callable macro in mdoc(7)
     
-    OpenBSD-Commit-ID: 30c0a34d74d91ddd0e6992525da70d3293392f70
+    so, as we do for %D, escape it;
+    
+    OpenBSD-Commit-ID: 538cfcddbbb59dc3a8739604319491dcb8e0c0c9
 
-commit 740dafa20f3f3d325f6f5d44e990b8c8a6d3d816
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Wed Apr 12 08:53:54 2023 +0000
+commit e0f91aa9c2fbfc951e9ced7e1305455fc614d3f2
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jul 28 05:33:15 2023 +0000
 
-    upstream: fix double words ok dtucker@
+    upstream: don't need to start a command here; use ssh -N instead.
     
-    OpenBSD-Commit-ID: 44d3223902fbce5276422bdc8063ab72a4078489
+    Fixes failure on cygwin spotted by Darren
+    
+    OpenBSD-Regress-ID: ff678a8cc69160a3b862733d935ec4a383f93cfb
 
-commit 6452f89577ec4f22440c31b8e19b061d1a7c4b2a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Apr 11 16:49:19 2023 +1000
+commit f446a44f30bc680e0d026a4204844b02646c1c2d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed May 17 05:52:01 2023 +0000
 
-    Test against LibreSSL 3.7.2.
+    upstream: add LTESTS_FROM variable to allow skipping of tests up to
+    
+    a specific point. e.g. "make LTESTS_FROM=t-sftp" will only run the sftp.sh
+    test and subsequent ones. ok dtucker@
+    
+    OpenBSD-Regress-ID: 07f653de731def074b29293db946042706fcead3
 
-commit 2138f6be595ca106fe4805a1e3ab9c4d8acc697b
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Apr 6 14:33:10 2023 +1000
+commit 8eb8899d612440a9b608bee7f916081d3d0b7812
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri May 12 06:37:42 2023 +0000
 
-    remove unused upper-case const strings in fmtfp
+    upstream: test ChrootDirectory in Match block
     
-    no float format that uses upper-case is supported nor are hex floats.
-    ok dtucker
+    OpenBSD-Regress-ID: a6150262f39065939f025e546af2a346ffe674c1
 
-commit 484c5e6168fdb22cbcd73c4ff987cf9ca47989ca
+commit e43f43d3f19516222e9a143468ea0dc1b3ab67b6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Apr 6 03:56:02 2023 +0000
+Date:   Fri May 12 06:36:27 2023 +0000
 
-    upstream: simplify sshsig_find_principals() similar to what happened to
-    
-    sshsig_check_allowed_keys() in r1.31, removing some dead code
+    upstream: better error messages
     
-    OpenBSD-Commit-ID: a493e628d4d6c08f878c276d998f4313ba61702d
+    OpenBSD-Regress-ID: 55e4186604e80259496d841e690ea2090981bc7a
 
-commit 3a7b110fbc7e096423f8f7b459deffe4c65d70f4
+commit 6958f00acf3b9e0b3730f7287e69996bcf3ceda4
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Apr 6 03:21:31 2023 +0000
+Date:   Thu Jul 27 22:26:49 2023 +0000
 
-    upstream: remove redundant ssh!=NULL check; we'd already
+    upstream: don't incorrectly truncate logged strings retrieved from
     
-    dereferenced it
+    PKCS#11 modules; based on GHPR406 by Jakub Jelen; ok markus
     
-    OpenBSD-Commit-ID: 852bf12591ec5a9fb12dcbde9b1fd3945ad0df3c
+    OpenBSD-Commit-ID: 7ed1082f23a13b38c373008f856fd301d50012f9
 
-commit 2519110659a1efac6c976895a86659d1b341c91b
+commit d1ffde6b55170cd4b9a72bfd9a3f17508e6cf714
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Apr 6 03:19:32 2023 +0000
+Date:   Thu Jul 27 22:25:17 2023 +0000
 
-    upstream: match_user() shouldn't be called with user==NULL unless
+    upstream: make sshd_config AuthorizedPrincipalsCommand and
     
-    host and ipaddr are also NULL
+    AuthorizedKeysCommand accept the %D (routing domain) and a new %C (connection
+    address/port 4-tuple) as expansion sequences; ok markus
     
-    OpenBSD-Commit-ID: fa3518346c21483e9e01a2e4b9436ae501daf8ea
+    OpenBSD-Commit-ID: ee9a48bf1a74c4ace71b69de69cfdaa2a7388565
 
-commit 3b9ceaad7ad63c1c03c2a89e148340ad3a62a482
+commit 999a2886ca1844a7a74b905e5f2c8c701f9838cd
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Apr 6 03:12:32 2023 +0000
+Date:   Thu Jul 27 22:23:05 2023 +0000
 
-    upstream: don't care about glob() return value here.
+    upstream: increase default KDF work-factor for OpenSSH format
     
-    OpenBSD-Commit-ID: 85bb82fea90478a482e9f65a1bec0aa24227fd66
-
-commit 09d8da0849e2791b2500267cda333cd238f38754
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Apr 3 08:10:54 2023 +0000
-
-    upstream: Move up null check and simplify process_escapes.
-    
-    Based on Coverity CID 291863 which points out we check the channel
-    pointer for NULLness after dereferencing it.  Move this to the start
-    of the function, and while there simplify initialization of efc a bit.
-    ok djm@
+    private keys from 16 to 24; { feedback ok } x { deraadt markus }
     
-    OpenBSD-Commit-ID: de36e5ad6fde0fe263ca134e986b9095dc59380a
+    OpenBSD-Commit-ID: a3afb1383f8ff0a49613d449f02395d9e8d4a9ec
 
-commit b36b162be5e6206f12b734222b7bc517c13a6bc8
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 31 14:51:20 2023 +1100
+commit 0fa803a1dd1c7b546c166000e23a869cf6c4ec10
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Jul 27 02:25:09 2023 +1000
 
-    need va_end() after va_copy(); ok dtucker
+    Prefer OpenSSL's SHA256 in sk-dummy.so
     
-    spotted by Coverity
+    Previously sk-dummy.so used libc's (or compat's) SHA256 since it may be
+    built without OpenSSL.  In many cases, however, including both libc's
+    and OpenSSL's headers together caused conflicting definitions.
+    
+    We tried working around this (on OpenSSL <1.1 you could define
+    OPENSSL_NO_SHA, NetBSD had USE_LIBC_SHA2, various #define hacks) with
+    varying levels of success.  Since OpenSSL >=1.1 removed OPENSSL_NO_SHA
+    and including most OpenSSL headers would bring sha.h in, even if it
+    wasn't used directly this was a constant hassle.
+    
+    Admit defeat and use OpenSSL's SHA256 unless we aren't using OpenSSL at
+    all.  ok djm@
 
-commit f703757234a5c585553e72bba279b255a272750a
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 31 05:56:36 2023 +0000
+commit 36cdb5dbf55c99c0faad06066f56a7c341258c1f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Jul 27 10:29:44 2023 +1000
 
-    upstream: Explicitly ignore return from waitpid here too.
-    
-    OpenBSD-Commit-ID: eef2403df083c61028969fc679ee370373eacacb
+    Retire dfly58 test VM.  Add dfly64.
 
-commit 6b73aa29035991d1448a1a76f63ac152a6bf931c
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 31 04:45:08 2023 +0000
+commit 2d34205dab08ede9b0676efa57647fc49e6decbe
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jul 26 23:06:00 2023 +0000
 
-    upstream: Explictly ignore return codes
+    upstream: make ssh -f (fork after authentication) work properly in
     
-    where we don't check them.
+    multiplexed cases (inc. ControlPersist). bz3589 bz3589 Based on patches by
+    Peter Chubb; ok dtucker@
     
-    OpenBSD-Commit-ID: 1ffb03038ba1b6b72667be50cf5e5e396b5f2740
+    OpenBSD-Commit-ID: a7a2976a54b93e6767dc846b85647e6ec26969ac
 
-commit 6f0308a3e717ebe68eeb3f95253612fab5dbf20e
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 31 04:42:29 2023 +0000
+commit 076aeda86a7ee9be8fd2f0181ec7b9729a6ceb37
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Sun Jul 23 20:04:45 2023 +0000
 
-    upstream: Return immediately from get_sock_port
-    
-    if sock <0 so we don't call getsockname on a negative FD.  From Coverity
-    CID 291840, ok djm@
+    upstream: man page typos; ok jmc@
     
-    OpenBSD-Commit-ID: de1c1130646230c2eda559831fc6bfd1b61d9618
+    OpenBSD-Commit-ID: e6ddfef94b0eb867ad88abe07cedc8ed581c07f0
 
-commit 1c1124dc901fca1ea2cb762044b8f1a5793a2bed
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 04:23:02 2023 +0000
+commit 135e7d5fe31f700e6dfc61ce914970c5ee7175ba
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Thu Jul 20 05:43:39 2023 +0000
 
-    upstream: don't leak arg2 on parse_pubkey_algos error path; ok
-    
-    dtucker@
+    upstream: tweak the allow-remote-pkcs11 text;
     
-    OpenBSD-Commit-ID: 7d0270ad3dd102412ca76add2b3760518abdef75
+    OpenBSD-Commit-ID: bc965460a89edf76865b7279b45cf9cbdebd558a
 
-commit 8ba2d4764bb6a4701cd447d8b52604622ffe65f4
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 04:22:27 2023 +0000
+commit 5f83342b61d1f76c141de608ed2bd293990416bd
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 25 13:00:22 2023 +1000
 
-    upstream: clamp max number of GSSAPI mechanisms to 2048; ok dtucker
+    Handle a couple more OpenSSL no-ecc cases.
     
-    OpenBSD-Commit-ID: ce66db603a913d3dd57063e330cb5494d70722c4
+    ok djm@
 
-commit 1883841fc13d0eada8743cac5d3abe142ee2efa7
+commit edc2ef4e418e514c99701451fae4428ec04ce538
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Jul 20 12:53:44 2023 +1000
+
+    depend
+
+commit 51fda734e0d3c2df256fc03e8b060c4305be6e59
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Jul 20 12:53:21 2023 +1000
+
+    Bring back OPENSSL_HAS_ECC to ssh-pkcs11-client
+
+commit 099cdf59ce1e72f55d421c8445bf6321b3004755
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 04:21:56 2023 +0000
+Date:   Wed Jul 19 14:03:45 2023 +0000
 
-    upstream: don't print key if printing hostname failed; with/ok
+    upstream: Separate ssh-pkcs11-helpers for each p11 module
     
-    dtucker@
+    Make ssh-pkcs11-client start an independent helper for each provider,
+    providing better isolation between modules and reliability if a single
+    module misbehaves.
     
-    OpenBSD-Commit-ID: ad42971a6ee5a46feab2d79f7f656f8cf4b119f3
+    This also implements reference counting of PKCS#11-hosted keys,
+    allowing ssh-pkcs11-helper subprocesses to be automatically reaped
+    when no remaining keys reference them. This fixes some bugs we have
+    that make PKCS11 keys unusable after they have been deleted, e.g.
+    https://bugzilla.mindrot.org/show_bug.cgi?id=3125
+    
+    ok markus@
+    
+    OpenBSD-Commit-ID: 0ce188b14fe271ab0568f4500070d96c5657244e
 
-commit c6011129cafe4c411f6ef670a4cf271314708eb8
+commit 29ef8a04866ca14688d5b7fed7b8b9deab851f77
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 04:04:15 2023 +0000
+Date:   Wed Jul 19 14:02:27 2023 +0000
 
-    upstream: remove redundant test
+    upstream: Ensure FIDO/PKCS11 libraries contain expected symbols
     
-    OpenBSD-Commit-ID: 6a0b719f9b1ae9d42ad8c5b144c7962c93792f7c
+    This checks via nlist(3) that candidate provider libraries contain one
+    of the symbols that we will require prior to dlopen(), which can cause
+    a number of side effects, including execution of constructors.
+    
+    Feedback deraadt; ok markus
+    
+    OpenBSD-Commit-ID: 1508a5fbd74e329e69a55b56c453c292029aefbe
 
-commit 4fb29eeafb40a2076c0dbe54e46b687c318f87aa
+commit 1f2731f5d7a8f8a8385c6031667ed29072c0d92a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 04:00:37 2023 +0000
+Date:   Wed Jul 19 13:56:33 2023 +0000
 
-    upstream: don't attempt to decode a ridiculous number of
+    upstream: Disallow remote addition of FIDO/PKCS11 provider
     
-    attributes; harmless because of bounds elsewhere, but better to be explicit
+    libraries to ssh-agent by default.
     
-    OpenBSD-Commit-ID: 1a34f4b6896155b80327d15dc7ccf294b538a9f2
+    The old behaviour of allowing remote clients from loading providers
+    can be restored using `ssh-agent -O allow-remote-pkcs11`.
+    
+    Detection of local/remote clients requires a ssh(1) that supports
+    the `session-bind@openssh.com` extension. Forwarding access to a
+    ssh-agent socket using non-OpenSSH tools may circumvent this control.
+    
+    ok markus@
+    
+    OpenBSD-Commit-ID: 4c2bdf79b214ae7e60cc8c39a45501344fa7bd7c
 
-commit fc437c154ef724621a4af236de9bc7e51a8381ae
+commit 892506b13654301f69f9545f48213fc210e5c5cc
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 31 03:22:49 2023 +0000
+Date:   Wed Jul 19 13:55:53 2023 +0000
 
-    upstream: remove unused variable; prompted by Coverity CID 291879
+    upstream: terminate process if requested to load a PKCS#11 provider
     
-    OpenBSD-Commit-ID: 4c7d20ef776887b0ba1aabcfc1b14690e4ad0a40
+    that isn't a PKCS#11 provider; from / ok markus@
+    
+    OpenBSD-Commit-ID: 39532cf18b115881bb4cfaee32084497aadfa05c
 
-commit 0eb8131e4a53b33a8fc9b9ab694e6b6778b87ade
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 31 00:44:29 2023 +0000
+commit f3f56df8ec476b2de6cbdbdfdb77a2a61087829d
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Jul 19 12:07:18 2023 +1000
 
-    upstream: Check fd against >=0 instead of >0 in error path. The
-    
-    dup could in theory return fd 0 although currently it doesn't in practice.
-    From Dmitry Belyavskiy vi github PR#238.
-    
-    OpenBSD-Commit-ID: 4a95f3f7330394dffee5c749d52713cbf3b54846
+    agent_fuzz doesn't want stdint.h conditionalised
 
-commit 7174ba6f8a431ca4257767a260fc50e204068242
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 30 07:19:50 2023 +0000
+commit 750911fd31d307a767cc86e3bfa90bbbb77b1a25
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Jul 18 15:41:12 2023 +1000
 
-    upstream: Ignore return value from muxclient(). It normally loops
-    
-    without returning, but it if returns on failure we immediately exit.
-    Coverity CID 405050.
+    conditionalise stdint.h inclusion on HAVE_STDINT_H
     
-    OpenBSD-Commit-ID: ab3fde6da384ea588226037c38635a6b2e015295
+    fixes build on AIX5 at least
 
-commit a4c1c2513e36f111eeaa1322c510067930e5e51e
+commit ff047504fa6e008c4092f8929881816b8993bea0
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 31 14:17:22 2023 +1100
+Date:   Tue Jul 18 15:30:45 2023 +1000
 
-    don't call connect() on negative socket
+    conditionalise match localnetwork on ifaddrs.h
     
-    Coverity CID 405037
+    Fixes build breakage on platforms that lack getifaddrs()
 
-commit 34ee842cdd981a759fe8f0d4a37521f9a1c63170
+commit b87b03282e466ca2927954ce93f5dbf0bfdc68f6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Mar 30 03:05:01 2023 +0000
+Date:   Mon Jul 17 06:16:33 2023 +0000
 
-    upstream: return SSH_ERR_KEY_NOT_FOUND if the allowed_signers file
-    
-    is empty, not SSH_ERR_INTERNAL_ERROR. Also remove some dead code spotted
-    by Coverity; with/ok dtucker@
+    upstream: missing match localnetwork negation check
     
-    OpenBSD-Commit-ID: 898a1e817cda9869554b1f586a434f67bcc3b650
+    OpenBSD-Commit-ID: 9a08ed8dae27d3f38cf280f1b28d4e0ff41a737a
 
-commit f108e77a9dc9852e72215af1bf27731c48434557
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 30 00:49:37 2023 +0000
+commit 6d6e185ba29ef4274164b77eab4dc763907f8821
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Mon Jul 17 05:41:53 2023 +0000
 
-    upstream: Remove dead code from inside if block.
+    upstream: - add -P to usage() - sync the arg name to -J in usage()
     
-    The only way the if statement can be true is if both dup()s fail, and
-    in that case the tmp2 can never be set. Coverity CID 291805, ok djm@
+    with that in ssh.1 - reformat usage() to match what "man ssh" does on 80width
     
-    OpenBSD-Commit-ID: c0d6089b3fb725015462040cd94e23237449f0c8
+    OpenBSD-Commit-ID: 5235dd7aa42e5bf90ae54579d519f92fc107036e
 
-commit 05b8e88ebe23db690abbfb1a91111abea09cde08
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Mar 30 13:53:29 2023 +1100
+commit f1a9898283a0638667b587ee4a950afd61ab51b0
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Mon Jul 17 05:38:10 2023 +0000
 
-    child_set_eng: verify both env pointer and count.
+    upstream: -P before -p in SYNOPSIS;
     
-    If child_set env was called with a NULL env pointer and a non-zero count
-    it would end up in a null deref, although we don't currently do this.
-    Prompted by Coverity CID 291850, tweak & ok djm@
+    OpenBSD-Commit-ID: 535f5257c779e26c6a662a038d241b017f8cab7c
 
-commit 28f1b8ef9b84b8cd2f6c9889a0c60aa4a90dadfa
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Mar 29 01:07:48 2023 +0000
+commit eef4d7e873568e1c84c36bb4034e2c3378250a61
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Mon Jul 17 05:36:14 2023 +0000
 
-    upstream: Ignore return from sshpkt_disconnect
-    
-    since we set our own return value for the function.  Coverity CID 291797,
-    ok djm@
+    upstream: configuation -> configuration
     
-    OpenBSD-Commit-ID: 710b57ba954c139240895e23feea41f203201f04
+    OpenBSD-Commit-ID: 4776ced33b780f1db0b2902faec99312f26a726b
 
-commit c3da05d95922f5550bcc7815e799474d6a160175
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Mar 29 00:59:08 2023 +0000
+commit dc1dbe94cf6532bd546a3373ad436404f8850e5f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 05:26:38 2023 +0000
 
-    upstream: Plug potential mem leak in process_put.
+    upstream: move other RCSIDs to before their respective license blocks
     
-    It allocates abs_dst inside a loop but only frees it on exit, so free
-    inside the loop if necessary.  Coverity CID 291837, ok djm@
+    too no code change
     
-    OpenBSD-Commit-ID: a01616503a185519b16f00dde25d34ceaf4ae1a3
+    OpenBSD-Commit-ID: ef5bf46b57726e4260a63b032b0b5ac3b4fe9cd4
 
-commit 13ae327eae598b1043e5ec30e4b170edb3c898a5
+commit ebe11044681caff78834ca6b78311ad19c1860b8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 29 00:18:35 2023 +0000
+Date:   Mon Jul 17 05:22:30 2023 +0000
 
-    upstream: fix memory leak; Coverity CID 291848
+    upstream: Move RCSID to before license block and away from #includes,
     
-    with/ok dtucker@
+    where it caused merge conflict in -portable for each commit :(
     
-    OpenBSD-Commit-ID: 37f80cb5d075ead5a00ad1b74175684ab1156ff8
+    OpenBSD-Commit-ID: 756ebac963df3245258b962e88150ebab9d5fc20
 
-commit 9ffa76e1284c85bf459c3dcb8e995733a8967e1b
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Mar 28 07:44:32 2023 +0000
+commit 05c08e5f628de3ecf6f7ea20947735bcfa3201e0
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 05:20:15 2023 +0000
 
-    upstream: Plug more mem leaks in sftp by making
+    upstream: return SSH_ERR_KRL_BAD_MAGIC when a KRL doesn't contain a
     
-    make_absolute_pwd_glob work in the same way as make_absolute: you
-    pass it a dynamically allocated string and it either returns it, or
-    frees it and allocates a new one. Patch from emaste at freebsd.org and
-    https://reviews.freebsd.org/D37253 ok djm@
+    valid magic number and not SSH_ERR_MESSAGE_INCOMPLETE; the former is needed
+    to fall back to text revocation lists in some cases; fixes t-cert-hostkey.
     
-    OpenBSD-Commit-ID: 85f7404e9d47fd28b222fbc412678f3361d2dffc
+    OpenBSD-Commit-ID: 5c670a6c0f027e99b7774ef29f18ba088549c7e1
 
-commit 82b2b8326962b1a98af279bc5bbbbbcab15b3e45
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Mar 28 06:12:38 2023 +0000
+commit c6fad2c3d19b74f0bd0af1ef040fc74f3a1d9ebb
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jul 17 14:56:14 2023 +1000
 
-    upstream: Remove compat code for OpenSSL < 1.1.*
-    
-    since -portable no longer supports them.
-    
-    OpenBSD-Commit-ID: ea2893783331947cd29a67612b4e56f818f185ff
+    avoid AF_LINK on platforms that don't define it
 
-commit b500afcf00ae1b6b73b2ccf171111dfbfeaef74d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Mar 27 23:56:54 2023 +0000
+commit 919bc3d3b712c920de1ae6be5ac6561c98886d7e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 04:08:31 2023 +0000
 
-    upstream: Remove compat code for OpenSSL 1.0.*
+    upstream: Add support for configuration tags to ssh(1).
     
-    versions now that -portable has dropped support for those versions.
+    This adds a ssh_config(5) "Tag" directive and corresponding
+    "Match tag" predicate that may be used to select blocks of
+    configuration similar to the pf.conf(5) keywords of the same
+    name.
     
-    OpenBSD-Regress-ID: 82a8eacd87aec28e4aa19f17246ddde9d5ce7fe7
-
-commit 727560e6011efcb36d2f3ac6910444bc775abaa1
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 28 18:06:42 2023 +1100
-
-    Prevent conflicts between Solaris SHA2 and OpenSSL.
+    ok markus
     
-    We used to prevent conflicts between native SHA2 headers and OpenSSL's
-    by setting OPENSSL_NO_SHA but that was removed prior to OpenSSL 1.1.0
+    OpenBSD-Commit-ID: dc08358e70e702b59ac3e591827e5a96141b06a3
 
-commit 46db8e14b7f186d32173dcdecd5b785334429b8b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 28 12:44:03 2023 +1100
+commit 3071d85a47061c1bdaf11a0ac233b501ecba862c
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 04:04:36 2023 +0000
 
-    Remove HEADER_SHA_H from previous...
+    upstream: add a "match localnetwork" predicate.
     
-    since it causes more problems than it solves.
+    This allows matching on the addresses of available network interfaces
+    and may be used to vary the effective client configuration based on
+    network location (e.g. to use a ProxyJump when not on a particular
+    network).
+    
+    ok markus@
+    
+    OpenBSD-Commit-ID: cffb6ff9a3803abfc52b5cad0aa190c5e424c139
 
-commit 72bd68d37387aa5f81da928f6e82f1c88ed8f674
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 28 10:35:18 2023 +1100
+commit beec17bb311365b75a0a5941418d4b96df7d7888
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 04:01:10 2023 +0000
 
-    Replace OPENSSL_NO_SHA with HEADER_SHA_H.
+    upstream: remove vestigal support for KRL signatures
     
-    Since this test doesn't use OpenSSL's SHA2 and may cause conflicts we
-    don't want to include it, but OPENSSL_NO_SHA was removed beginning in
-    OpenSSL's 1.1 series.
+    When the KRL format was originally defined, it included support for
+    signing of KRL objects. However, the code to sign KRLs and verify KRL
+    signatues was never completed in OpenSSH.
+    
+    Now, some years later, we have SSHSIG support in ssh-keygen that is
+    more general, well tested and actually works. So this removes the
+    semi-finished KRL signing/verification support from OpenSSH and
+    refactors the remaining code to realise the benefit - primarily, we
+    no longer need to perform multiple parsing passes over KRL objects.
+    
+    ok markus@
+    
+    OpenBSD-Commit-ID: 517437bab3d8180f695c775410c052340e038804
 
-commit 99668f2e6e0deb833e46cfab56db59ff0fc28c7e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 28 09:50:06 2023 +1100
+commit 449566f64c21b4578d5c0c431badd0328adc53ed
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jul 17 03:57:21 2023 +0000
 
-    Configure with --target instead of deprecated form.
+    upstream: Support for KRL extensions.
+    
+    This defines wire formats for optional KRL extensions and implements
+    parsing of the new submessages. No actual extensions are supported at
+    this point.
+    
+    ok markus
+    
+    OpenBSD-Commit-ID: ae2fcde9a22a9ba7f765bd4f36b3f5901d8c3fa7
 
-commit f751d9306c62cd1061f966e6a7483d9bab9c379b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Mar 27 22:05:29 2023 +1100
+commit 18ea857770e84825a3a6238bb37f54864487b59f
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jul 14 07:44:21 2023 +0000
 
-    Pass rpath when building 64bit Solaris.
+    upstream: Include stdint.h for SIZE_MAX. Fixes OPENSSL=no build.
+    
+    OpenBSD-Commit-ID: e7c31034a5434f2ead3579b13a7892960651e6b0
 
-commit a64b935cd450ee8d04c26c9cd728629cf9ca5c91
+commit 20b768fcd13effe0f2d3619661b6c8592c773553
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Mar 27 19:21:19 2023 +1100
+Date:   Fri Jul 14 17:07:32 2023 +1000
 
-    Explicitly disable OpenSSL on AIX test VM.
+    Fix typo in declaration of nmesg.
 
-commit 7ebc6f060fc2f70495a56e16d210baae6424cd96
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Mar 27 03:56:50 2023 +0000
+commit 4b94d09542e36ebde2eb9ad89bc68431609932de
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Jul 14 15:34:47 2023 +1000
 
-    upstream: Add RevokedHostKeys to percent expansion test.
+    portable-specific int overflow defence-in-depth
     
-    OpenBSD-Regress-ID: c077fd12a38005dd53d878c5b944154dec88d2ff
+    These too are unreachable, but we want the code to be safe regardless of
+    context. Reported by Yair Mizrahi @ JFrog
 
-commit f1a17de150f8d309d0c52f9abfaebf11c51a8537
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Mar 27 03:56:11 2023 +0000
+commit 2ee48adb9fc8692e8d6ac679dcc9f35e89ad68f0
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jul 14 05:31:44 2023 +0000
 
-    upstream: Add tilde and environment variable expansion to
+    upstream: add defence-in-depth checks for some unreachable integer
     
-    RevokedHostKeys. bz#3552, ok djm@
+    overflows reported by Yair Mizrahi @ JFrog; feedback/ok millert@
     
-    OpenBSD-Commit-ID: ce5d8e0219b63cded594c17d4c2958c06918ec0d
+    OpenBSD-Commit-ID: 52af085f4e7ef9f9d8423d8c1840a6a88bda90bd
 
-commit 009eb4cb48a9708ab9174684dcbcc0f942907abe
+commit 4b43bc358ae6f6b19a973679246dc5172f6ac41b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Mar 27 03:31:05 2023 +0000
+Date:   Mon Jul 10 04:51:26 2023 +0000
 
-    upstream: fix test: getnameinfo returns a non-zero value on error, not
-    
-    (neccessarily) -1. From GHPR#384
+    upstream: misplaced debug message
     
-    OpenBSD-Commit-ID: d35e2b71268f66f5543a7ea68751972b3ae22b25
+    OpenBSD-Commit-ID: d0f12af0a5067a756aa707bc39a83fa6f58bf7e5
 
-commit 4f0a676486700f10a4788f7e9426e94e39c1c89e
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Mar 27 03:25:08 2023 +0000
+commit 8c7203bcee4c4f98a22487b4631fe068b992099b
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Jul 12 11:41:19 2023 +1000
 
-    upstream: scp: when copying local->remote, check that source file
+    replace deprecate selinux matchpathcon function
     
-    exists before opening SFTP connection to the server. Based on GHPR#370 ok
-    dtucker, markus
+    This function is apparently deprecated. Documentation on what is the
+    supposed replacement is is non-existent, so this follows the approach
+    glibc used https://sourceware.org/git/?p=glibc.git;a=patch;h=f278835f59
     
-    OpenBSD-Commit-ID: b4dd68e15bfe22ce4fac9960a1066a2b721e54fb
-
-commit 154d8baf631327163571760c2c524bc93c37567c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Mar 27 12:22:30 2023 +1100
-
-    Also look for gdb error message from OpenIndiana.
+    ok dtucker@
 
-commit fbd3811ddb2b6ce2e6dba91fde7352c8978e5412
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Mar 27 11:08:00 2023 +1100
+commit 7e8800f5d701efffa39ccb63ca1e095ea777c31a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Jul 6 22:17:59 2023 +0000
 
-    Explicitly disable security key test on aix51 VM.
+    upstream: minleft and maxsign are u_int so cast appropriately. Prompted
     
-    We don't know how to build the shared objects required for the security
-    key tests so skip them.
+    by github PR#410, ok deraadt.
+    
+    OpenBSD-Commit-ID: 0514cd51db3ec60239966622a0d3495b15406ddd
 
-commit 4922ac3be8a996780ef3dc220411da2e27c29d9c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Mar 26 14:49:43 2023 +1100
+commit 94842bfe9b09fc93189c6ed0dc9bbebc1d44a426
+Author: dlg@openbsd.org <dlg@openbsd.org>
+Date:   Tue Jul 4 03:59:21 2023 +0000
 
-    Split libcrypto and other config flags.
+    upstream: add support for unix domain sockets to ssh -W
     
-    This should allow the automatic OpenSSL version selection in the tests
-    to work better.
+    ok djm@ dtucker@
+    
+    OpenBSD-Commit-ID: 3e6d47567b895c7c28855c7bd614e106c987a6d8
 
-commit 4a948b1469f185e871160a2d70e2a0fce2858f9e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Mar 26 14:39:45 2023 +1100
+commit a95fc5eed09a0238fb127b6c50e8498432b79dae
+Author: David Seifert <soap@gentoo.org>
+Date:   Fri May 12 14:06:01 2023 +0200
 
-    Specify test target if we build without OpenSSL.
+    gss-serv.c: `MAXHOSTNAMELEN` -> `HOST_NAME_MAX`
     
-    When we decide we can't use the versions of OpenSSL available, also
-    restrict the tests we run to avoid the ones that need OpenSSL.
+    `MAXHOSTNAMELEN` is not defined in POSIX, which breaks on musl:
+    https://pubs.opengroup.org/onlinepubs/9699919799/functions/gethostname.html
+    
+    Bug: https://bugs.gentoo.org/834044
 
-commit b308c636f5b5d89eecb98be00b3d56306a005a09
+commit 8a6cd08850f576e7527c52a1b086cae82fab290e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Mar 26 14:22:53 2023 +1100
+Date:   Fri Jun 23 09:49:02 2023 +1000
 
-    Find suitable OpenSSL version.
+    Update runner OS version for hardenedmalloc test.
     
-    Check the installed OpenSSL versions for a suitable one, and if there
-    isn't (and we don't have a specific version configured) then build
-    without OpenSSL.
+    Hardenedmalloc dropped support for "legacy glibc" versions in their
+    64dad0a69 so use a newer Ubuntu version for the runner for that test.
 
-commit 021ea5c2860f133f44790970968e0e73208b3a87
+commit cfca6f17e64baed6822bb927ed9f372ce64d9c5b
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:02:52 2023 +1100
+Date:   Thu Jun 22 15:04:03 2023 +1000
 
-    Github testing support for BoringSSL
+    handle sysconf(SC_OPEN_MAX) returning > INT_MAX;
+    
+    bz3581; ok dtucker
 
-commit 9a97cd106466a2a9bda2bfaa4c48c4f1b2cc9c1b
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:34:29 2023 +1100
+commit c1c2ca1365b3f7b626683690bd2c68265f6d8ffd
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jun 21 05:10:26 2023 +0000
 
-    BoringSSL doesn't support EC_POINT_point2bn()
+    upstream: better validate CASignatureAlgorithms in ssh_config and
     
-    so don't invoke it in unittest
-
-commit cc5969c033a032d126ff78e5d95cf20abbede4c7
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:34:05 2023 +1100
-
-    another ERR_load_CRYPTO_strings() vestige
-
-commit 4974293899a068133e976f81d6693670d2b576ca
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:24:05 2023 +1100
-
-    don't use obsolete ERR_load_CRYPTO_strings()
+    sshd_config.
     
-    OpenSSL (and elsewhere in OpenSSH) uses ERR_load_crypto_strings()
-
-commit 3c527d55f906e6970d17c4cab6db90ae9e013235
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:23:05 2023 +1100
-
-    Allow building with BoringSSL
-
-commit b7e27cfd7f163fc16b4c5d041cc28ee488a5eeec
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 15:21:18 2023 +1100
-
-    put back SSLeay_version compat in configure test
+    Previously this directive would accept certificate algorithm names, but
+    these were unusable in practice as OpenSSH does not support CA chains.
     
-    Needed to detect old versions and give good "your version is bad"
-    messages at configure time; spotted by dtucker@
+    part of bz3577; ok dtucker@
+    
+    OpenBSD-Commit-ID: a992d410c8a78ec982701bc3f91043dbdb359912
 
-commit 7280401bdd77ca54be6867a154cc01e0d72612e0
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 24 13:56:25 2023 +1100
+commit 4e73cd0f4ab3e5b576c56cac9732da62c8fc0565
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jun 21 05:08:32 2023 +0000
 
-    remove support for old libcrypto
+    upstream: make `ssh -Q CASignatureAlgorithms` only list signature
     
-    OpenSSH now requires LibreSSL 3.1.0 or greater or
-    OpenSSL 1.1.1 or greater
+    algorithms that are valid for CA signing. Previous behaviour was to list all
+    signing algorithms, including certificate algorithms (OpenSSH certificates do
+    not support CA chains). part of bz3577; ok dtucker@
     
-    with/ok dtucker@
-
-commit abda22fb48302f2142233f71d27c74040288c518
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Mar 19 15:36:13 2023 +1100
-
-    Test latest OpenSSL 1.1, 3.0 and LibreSSL 3.7.
-
-commit 610ac1cb077cd5a1ebfc21612154bfa13d2ec825
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Mar 16 21:38:04 2023 +1100
-
-    Show 9.3 branch instead of 9.2.
-
-commit cb30fbdbee869f1ce11f06aa97e1cb8717a0b645
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Mar 16 08:28:19 2023 +1100
-
-    depend
-
-commit 1dba63eb10c40b6fda9f5012ed6ae87e2d3d028e
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Mar 16 08:27:54 2023 +1100
-
-    crank version
+    OpenBSD-Commit-ID: 99c2b072dbac0f44fd1f2269e3ff6c1b5d7d3e59
 
-commit ba7532d0dac9aaf0ad7270664c43837fc9f64a5f
+commit a69062f1695ac9c3c3dea29d3044c72aaa6af0ea
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 15 21:19:57 2023 +0000
+Date:   Wed Jun 21 05:06:04 2023 +0000
 
-    upstream: openssh-9.3
+    upstream: handle rlimits > INT_MAX (rlim_t is u64); ok dtucker
     
-    OpenBSD-Commit-ID: 8011495f2449c1029bb316bd015eab2e00509848
+    bz3581
+    
+    OpenBSD-Commit-ID: 31cf59c041becc0e5ccb0a77106f812c4cd1cd74
 
-commit 6fd4daafb949b66bf555f3100f715a9ec64c3390
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Mar 14 07:28:47 2023 +0000
+commit 8d33f2aa6bb895a7f85a47189913639086347b75
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jun 20 23:59:33 2023 +0000
 
-    upstream: Free KRL ptr in addition to its contents.
+    upstream: prepare for support for connecting to unix domain sockets
     
-    From Coverity CID 291841, ok djm@
+    using ssh -W by explicitly decoding PORT_STREAMLOCAL (a negative number) from
+    the u32 that's passed over the multiplexing socket; previously code would
+    just cast, which is UB.
     
-    OpenBSD-Commit-ID: f146ba08b1b43af4e0d7ad8c4dae3748b4fa31b6
+    OpenBSD-Commit-ID: e5ac5f40d354096c51e8c118a5c1b2d2b7a31384
 
-commit 1d270bd303afaf6d94e9098cbbf18e5e539e2088
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Mar 14 07:26:25 2023 +0000
+commit b4ac435b4e67f8eb5932d8f59eb5b3cf7dc38df0
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jun 20 00:05:09 2023 +0000
 
-    upstream: Check pointer for NULL before deref.
+    upstream: reset comment=NULL for each key in do_fingerprint();
     
-    None of the existing callers seem to do that, but it's worth checking.
-    From Coverity CID 291834, ok djm@
+    fixes "no comment" not showing on when running `ssh-keygen -l` on multiple
+    keys where one has a comment and other following keys do not. Patch from
+    Markus Kuhn via GHPR407, bz3580
     
-    OpenBSD-Commit-ID: a0a97113f192a7cb1a2c97b932f677f573cda7a4
+    OpenBSD-Commit-ID: 3cce84456fdcd67dc6b84e369f92c6686d111d9b
 
-commit d95af508e78c0cd3dce56b83853baaa59ae295cf
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Mar 12 10:40:39 2023 +0000
+commit b53a809a549dcd4fbde554c6aa283e597b15ea33
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Mon Jun 5 13:24:36 2023 +0000
 
-    upstream: Limit number of entries in SSH2_MSG_EXT_INFO
+    upstream: Store timeouts as int, not u_int as they are limited to
     
-    request. This is already constrained by the maximum SSH packet size but this
-    makes it explicit.  Prompted by Coverity CID 291868, ok djm@ markus@
+    INT_MAX. Fixes sign compare warnings systems with 32-bit time_t due to type
+    promotion.  OK djm@
     
-    OpenBSD-Commit-ID: aea023819aa44a2dcb9dd0fbec10561896fc3a09
+    OpenBSD-Commit-ID: 48081e9ad35705c5f1705711704a4c2ff94e87b7
 
-commit 8f287ba60d342b3e2f750e7332d2131e3ec7ecd0
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Mar 12 09:41:18 2023 +0000
+commit 2709809fd616a0991dc18e3a58dea10fb383c3f0
+Author: Philip Hands <phil@hands.com>
+Date:   Wed May 24 19:41:14 2023 +0200
 
-    upstream: calloc can return NULL but xcalloc can't.
+    fixup! if -s & -p specified, mention 'sftp -P' on
     
-    From Coverity CID 291881, ok djm@
+    success
     
-    OpenBSD-Commit-ID: 50204b755f66b2ec7ac3cfe379d07d85ca161d2b
+    SSH-Copy-ID-Upstream: 32686e7c65b4fa2846e474d3315102dfa0f043b0
 
-commit 83a56a49fd50f4acf900f934279482e4ef329715
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 10 07:17:08 2023 +0000
+commit 204e0bf05161b7641500d7ab266c21217412379f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Aug 3 21:25:48 2021 +1000
 
-    upstream: Explicitly ignore return from fcntl
+    Make ssh-copy-id(1) consistent with OpenSSH.
     
-    (... FD_CLOEXEC) here too.  Coverity CID 291853.
+    This makes the ssh-copy-id man page more consistent with the rest of the
+    OpenSSH man pages:
+    - new sentence, new line
+    - no sentences >80
+    - N.B. -> NB
+    - zap unused .Pp
+    - zap trailing whitespace
     
-    OpenBSD-Commit-ID: 99d8b3da9d0be1d07ca8dd8e98800a890349e9b5
+    Report from Debian via mindrot bz#3331, diff from jmc at openbsd.org.
+    
+    SSH-Copy-ID-Upstream: d8974cfb6242316460ed22a1ccc662800a50c5d3
 
-commit 0fda9d704d3bbf54a5e64ce02a6fecb11fe7f047
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Mar 10 15:59:46 2023 +1100
+commit 9de79df66d1430d290fab670bb4b18612875e518
+Author: Philip Hands <phil@hands.com>
+Date:   Wed May 24 11:45:43 2023 +0200
 
-    bounds checking for getrrsetbyname() replacement;
+    if -s & -p specified, mention 'sftp -P' on success
     
-    Spotted by Coverity in CID 405033; ok millert@
+    This was inspired by this:
+     https://github.com/openssh/openssh-portable/pull/321
+    but I thought that it was better to not do the sed patching.
+    
+    BTW the reason one can get away with using $SSH_OPTS throughout, despite
+    the lowercase -p in there, even if sftp is in use, is that the sftp call
+    is using the already-established ssh master connection, so the port was
+    passed to the earlier ssh.
+    
+    SSH-Copy-ID-Upstream: 1c124d9bfafdbe28a00b683367ebf5750ce12eb2
 
-commit 89b8df518f21677045599df0ad3e5dd0f39909b5
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 10 04:06:21 2023 +0000
+commit 801cda54c00e0f4e7d89345a90874c8d05dc233a
+Author: Philip Hands <phil@hands.com>
+Date:   Tue May 23 23:07:11 2023 +0200
 
-    upstream: Plug mem leak on error path. Coverity CID 405026, ok djm@.
+    drop whitespace
     
-    OpenBSD-Commit-ID: 8212ca05d01966fb5e72205c592b2257708a2aac
+    SSH-Copy-ID-Upstream: e604fae1cdee35c18055d35dcec530cf12ef00ad
 
-commit bf4dae0ad192c3e2f03f7223834b00d88ace3d3e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Mar 10 14:46:57 2023 +1100
+commit 288482f53613f3e74544eb92deeb24f7c7f1f371
+Author: Philip Hands <phil@hands.com>
+Date:   Tue May 23 20:52:13 2023 +0200
 
-    Add prototypes for mkstemp replacements.
+    make -x also apply to the target script
     
-    Should prevent warnings due to our wrapper function.
+    SSH-Copy-ID-Upstream: 3c4214704f427bd0654adf9b0fc079253db21cf4
 
-commit 4e04d68d6a33cdc73b831fd4b5e6124175555d3d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 10 03:01:51 2023 +0000
+commit b79e7b88ed44f0e4339f0ff35c96c78a92175a8d
+Author: Philip Hands <phil@hands.com>
+Date:   Tue May 23 16:46:42 2023 +0200
 
-    upstream: Expliticly ignore return code from fcntl(.. FD_CLOEXEC) since
+    add -t option to specify the target path
     
-    there's not much we can do anyway.  From Coverity CID 291857, ok djm@
+    Allow the default target path (.ssh/authorized_files) to be over-riden
     
-    OpenBSD-Commit-ID: 051429dd07af8db3fec10d82cdc78d90bb051729
+    This was inspired by this MR from Panagiotis Cheilaris <philaris@cs.ntua.gr>
+    
+     https://gitlab.com/phil_hands/ssh-copy-id/-/merge_requests/8
+    
+    SSH-Copy-ID-Upstream: a942a0e076874adb6d8b2f0fb76d6c7918190fcd
 
-commit d6d38fd77cbe091c59e1bb720c3a494df4990640
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 10 02:32:04 2023 +0000
+commit 914f4ad138714c471ba72fb6d5496b6235320edd
+Author: Carlos Rodríguez Gili <carlos.rodriguez-gili@upc.edu>
+Date:   Tue Apr 20 19:23:57 2021 +0200
 
-    upstream: Like sshd_config, some ssh_config options are not
+    Fix test error for /bin/sh on Solaris 10 and older
     
-    first-match-wins. sshd_config.5 was fixed in r1.348, this is the same for
-    this file
+    On Solaris 10 and older targets /bin/sh is not POSIX-compliant.
+    Test -z `...` fails with error 'sh: test: argument expected'.
+    Using quotes around backticks fixes this and doesn't break
+    POSIX compatibility.
     
-    OpenBSD-Commit-ID: 7be55b9351cde449b136afcc52d07aa4113b215e
+    SSH-Copy-ID-Upstream: 98394072a3f985b2650c1e8eab2fef84e38cc065
 
-commit 7187d3f86bf8f2066cc9941f217d23b0cacae25e
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 10 02:24:56 2023 +0000
+commit bd382dca316c721aed1e45edcf4c4e0f6374afb0
+Author: Jakub Jelen <jjelen@redhat.com>
+Date:   Tue Mar 2 21:34:05 2021 +0000
 
-    upstream: Remove no-op (int) > INT_MAX checks
+    Remove outdated comment
     
-    since they can never be true. From Coverity CID 405031, ok djm@
+    The commit b068122 removed the code dropping the trailing colon, but the comment stayed leaving the code confusing for future readers
     
-    OpenBSD-Commit-ID: 9df3783b181e056595e2bb9edf7ed41d61cf8e84
+    SSH-Copy-ID-Upstream: 930d39f238117cd53810240ec989d0356aa1c1f6
 
-commit 77adde4305542ebe3005dd456122624fe2347b01
+commit bdcaf7939029433635d63aade8f9ac762aca2bbe
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Mar 10 13:27:29 2023 +1100
+Date:   Wed May 10 18:50:46 2023 +1000
 
-    Wrap mkstemp calls with umask set/restore.
+    Special case OpenWrt instead of Dropbear.
     
-    glibc versions 2.06 and earlier did not set a umask on files created by
-    mkstemp created the world-writable.  Wrap mkstemp to set and restore
-    the umask.  From Coverity (CIDs 291826 291886 291891), ok djm@
+    OpenWrt overrides the location of authorized_keys for root.  Currently we
+    assume that all Dropbear installations behave this way, which is not the
+    case.  Check for OpenWrt and root user before using that location instead
+    of assuming that for all Dropbear servers.  Prompted by Github PR#250.
+    
+    SSH-Copy-ID-Upstream: 0e1f5d443a9967483c33945793107ae3f3e4af2d
 
-commit 633d3dc2a1e9e2a013d019a0576a0771c8423713
-Author: jcs@openbsd.org <jcs@openbsd.org>
-Date:   Thu Mar 9 21:06:24 2023 +0000
+commit cf84498f67abe93f813a296167b406a0db7b288e
+Author: Philip Hands <phil@hands.com>
+Date:   Thu May 18 18:20:55 2023 +0200
 
-    upstream: modify parentheses in conditionals to make it clearer what is
+    ssh-copy-id: add -x option (for debugging)
     
-    being assigned and what is being checked
+    This option causes the ssh-copy-id to run with set -x
     
-    ok djm dtucker
+    SSH-Copy-ID-Upstream: a0ee367ea8c0a29c8b4515245e408d2d349e7844
+
+commit b4a1efdcb88f03394c08e7f68ed4e11676830002
+Author: Philip Hands <phil@hands.com>
+Date:   Thu May 18 17:14:41 2023 +0200
+
+    update copyright notices
     
-    OpenBSD-Commit-ID: 19c10baa46ae559474409f75a5cb3d0eade7a9b8
+    SSH-Copy-ID-Upstream: c284ed33b361814ea48ff68cbd01ca525b2bf117
 
-commit 733030840c4772f858de95d5940ec0c37663e8b0
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 9 07:11:05 2023 +0000
+commit fcd78e31cdd45a7e69ccfe6d8a3b1037dc1de290
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed May 24 23:01:06 2023 +0000
 
-    upstream: Re-split the merge of the reorder-hostkeys test.
+    upstream: fix AuthorizedPrincipalsCommand when AuthorizedKeysCommand
     
-    In the kex_proposal_populate_entries change I merged the the check for
-    reordering hostkeys with the actual reordering, but kex_assemble_names
-    mutates options.hostkeyalgorithms which renders the check ineffective.
-    Put the check back where it was.  Spotted and tested by jsg@, ok djm@
+    appears previously in configuration. Reported by John Meyers in bz3574 ok
+    dtucker@
     
-    OpenBSD-Commit-ID: a7469f25a738db5567395d1881e32479a7ffc9de
+    OpenBSD-Commit-ID: 1c92e4517284386703936e1d3abaa36cfacf1951
 
-commit 54ac4ab2b53ce9fcb66b8250dee91c070e4167ed
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Mar 9 06:58:26 2023 +0000
+commit 5ec5504f1d328d5bfa64280cd617c3efec4f78f3
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed May 10 10:04:20 2023 +0000
 
-    upstream: include destination constraints for smartcard keys too.
+    upstream: Remove unused prototypes for ssh1 RSA functions.
     
-    Spotted by Luci Stanescu; ok deraadt@ markus@
+    From lengyijun via github PR#396.
     
-    OpenBSD-Commit-ID: add879fac6903a1cb1d1e42c4309e5359c3d870f
+    OpenBSD-Commit-ID: 379a5afa8b7a0f3cba0c8a9bcceb4e5e33a5c1ef
 
-commit bfd1ad01d974a316b60622759ad17537fa2d92b4
+commit fbf362b3891ae4b36052d1b39f37fc618b41c476
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Mar 9 18:24:54 2023 +1100
+Date:   Tue May 9 19:26:56 2023 +1000
 
-    Limit the number of PAM environment variables.
-    
-    xcalloc has its own limits, but these are specific to PAM.  From
-    Coverity CID 405198, ok djm@
+    main(void) to prevent unused variable warning.
 
-commit a231414970e01a35f45a295d5f93698fa1249b28
+commit baf854c8bb0a6d0af5c696c801e631a48dabbaba
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Mar 9 18:19:44 2023 +1100
+Date:   Tue May 9 19:25:45 2023 +1000
 
-    Limit the number of PAM environment variables.
-    
-    From Coverity CID 405194, tweaks and ok djm@
+    Remove warning pragma since clang doesn't like it.
 
-commit 36c6c3eff5e4a669ff414b9daf85f919666e8e03
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Mar 8 06:21:32 2023 +0000
+commit 5fbb7a1349fbbb48ccb1b8cafff2c1854370d87d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue May 9 17:13:33 2023 +1000
 
-    upstream: Plug mem leak. Coverity CID 405196, ok djm@
-    
-    OpenBSD-Commit-ID: 175f09349387c292f626da68f65f334faaa085f2
+    Suppress warning for snprintf truncation test.
 
-commit dfb9b736e1ccf9e6b03eea21cd961f4fd0634c98
-Author: tb@openbsd.org <tb@openbsd.org>
-Date:   Wed Mar 8 05:33:53 2023 +0000
+commit 47742c513e4e045ecc985c6483fc5c8b050acda2
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue May 9 17:12:50 2023 +1000
 
-    upstream: ssh-pkcs11: synchronize error messages with errors
-    
-    A handful of error messages contained incorrect function names or
-    otherwise inaccurate descriptions. Fix them to match reality.
-    
-    input/ok djm
+    Update OpenSSL compat test for 3.x.
+
+commit 86ad25d455a2313126125540e61e0f9314283f88
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon May 8 20:23:08 2023 +1000
+
+    Add macos13 PAM test target.
+
+commit 77cca2c4b13bc6e5f389565583b6202b0d1bccc2
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon May 8 20:14:46 2023 +1000
+
+    Skip agent-peereid test on macos13.
     
-    OpenBSD-Commit-ID: 165a15db52f75b31e1804b043480c36af09f3411
+    sudo -S nobody doesn't work on the github runners (probably a
+    permission issue) so skip that test.
 
-commit 51875897b81b5c21b80c256a29597916edbde454
-Author: guenther@openbsd.org <guenther@openbsd.org>
-Date:   Wed Mar 8 04:43:12 2023 +0000
+commit b356b8e91678ea295bcf44df5248c3fbf499fdcf
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon May 8 20:14:28 2023 +1000
 
-    upstream: Delete obsolete /* ARGSUSED */ lint comments.
+    Include config.guess in debug output.
+
+commit b7afd8a4ecaca8afd3179b55e9db79c0ff210237
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon May 8 20:12:59 2023 +1000
+
+    Handle OpenSSL >=3 ABI compatibility.
     
-    ok miod@ millert@
+    Beyond OpenSSL 3.0, the ABI compatibility guarantees are wider (only
+    major must match instead of major and minor in earlier versions).
+    bz#3548, ok djm@
+
+commit 0e9e2663eb2c6e9c3e10d15d70418312ae67e542
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon May 1 08:57:29 2023 +0000
+
+    upstream: Import regenerated moduli.
     
-    OpenBSD-Commit-ID: 7be168a570264d59e96a7d2d22e927d45fee0e4c
+    OpenBSD-Commit-ID: 3d5f811cfcaed8cc4a97e1db49ac61bdf118113c
 
-commit a76085bda883c2104afb33ab0334eca190927362
+commit d9687f49682e1e93383fc15ab2018850b2ef38c3
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Mar 8 17:25:37 2023 +1100
+Date:   Mon May 1 11:45:14 2023 +1000
 
-    Extra brackets to prevent warning.
+    Add macos-13 test target.
+    
+    Also flatten OS list for clarity.
 
-commit 147ae57d4dfa0508109f93b78a7d8b92819e1f83
+commit aacfd6767497b8fa6d41ecdd3f8e265d1e9ef1f6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 8 00:05:58 2023 +0000
+Date:   Sun Apr 30 22:54:22 2023 +0000
 
-    upstream: use RSA/SHA256 when testing usability of private key in
+    upstream: adjust ftruncate() logic to handle servers that reorder
     
-    agent; with/ok dtucker
+    requests.
     
-    OpenBSD-Commit-ID: fe1382e2fdf23fcae631308e72342bad56066a56
+    sftp/scp will ftruncate the destination file after a transfer completes,
+    to deal with the case where a longer destination file already existed.
+    We tracked the highest contiguous block transferred to deal with this
+    case, but our naive tracking doesn't deal with servers that reorder
+    requests - a misfeature strictly permitted by the protocol but seldom
+    implemented.
+    
+    Adjust the logic to ftruncate() at the highest absolute block received
+    when the transfer is successful. feedback deraadt@ ok markus@
+    
+    prompted by https://github.com/openssh/openssh-portable/commit/9b733#commitcomment-110679778
+    
+    OpenBSD-Commit-ID: 4af7fac75958ad8507b4fea58706f3ff0cfddb1b
 
-commit 27fd251bc906a763e70ce0f27c8abdf8bbd1e416
+commit c8eb3941758615c8284a48fff47872db926da63c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 8 00:05:37 2023 +0000
+Date:   Wed Apr 26 01:36:03 2023 +0000
 
-    upstream: use RSA/SHA256 when testing usability of private key;
+    upstream: Check for ProxyJump=none in CanonicalizeHostname logic.
     
-    based on fix in bz3546 by Dmitry Belyavskiy; with/ok dtucker
+    Previously ssh would incorrectly refuse to canonicalise the hostname
+    if ProxyJump was explicitly set to "none" when CanonicalizeHostname=yes
     
-    OpenBSD-Commit-ID: 0ef414cc363a832f9fab92a5da0234448bce2eba
+    bz3567; ok dtucker
+    
+    OpenBSD-Commit-ID: 80a58e43c3a32f97361282f756ec8d3f37989efd
 
-commit eee9f3fc3d52ae7d2106929bb06b7f291fb0b81a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Mar 7 21:47:42 2023 +0000
+commit ac383f3a5c6f529a2e8a5bc44af79a08c7da294e
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Wed Apr 12 14:22:04 2023 +0000
 
-    upstream: refactor to be more readable top to bottom. Prompted by
+    upstream: remove duplicate signal.h include
     
-    Coverity CID 405048 which was a false-positive fd leak; ok dtucker@
+    OpenBSD-Commit-ID: 30c0a34d74d91ddd0e6992525da70d3293392f70
+
+commit 740dafa20f3f3d325f6f5d44e990b8c8a6d3d816
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Wed Apr 12 08:53:54 2023 +0000
+
+    upstream: fix double words ok dtucker@
     
-    OpenBSD-Commit-ID: fc55ec2af622a017defb9b768bf26faefc792c00
+    OpenBSD-Commit-ID: 44d3223902fbce5276422bdc8063ab72a4078489
 
-commit 42a06b29a4c99272bf690f9b3be520b08b448dc5
+commit 6452f89577ec4f22440c31b8e19b061d1a7c4b2a
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 7 18:34:41 2023 +1100
+Date:   Tue Apr 11 16:49:19 2023 +1000
 
-    Add header changes missed in previous.
+    Test against LibreSSL 3.7.2.
 
-commit 4710077096edff2e6926dd5b15bf586491d317db
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Mar 7 06:09:14 2023 +0000
+commit 2138f6be595ca106fe4805a1e3ab9c4d8acc697b
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Apr 6 14:33:10 2023 +1000
 
-    upstream: Fix mem leak in environment setup.
-    
-    From jjelen at redhat.com via bz#2687, ok djm@
+    remove unused upper-case const strings in fmtfp
     
-    OpenBSD-Commit-ID: 9f9e4ba3cac003e6f81da3bcebd1b9ec43e7f353
+    no float format that uses upper-case is supported nor are hex floats.
+    ok dtucker
 
-commit 03acc50d0ccb78fc91d1570de1cd0fdfea646028
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Mar 6 12:15:47 2023 +0000
+commit 484c5e6168fdb22cbcd73c4ff987cf9ca47989ca
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Apr 6 03:56:02 2023 +0000
 
-    upstream: Unit test for kex_proposal_populate_entries.
+    upstream: simplify sshsig_find_principals() similar to what happened to
     
-    OpenBSD-Regress-ID: bdb211d80d572a08bf14b49fe2a58b9ff265c006
+    sshsig_check_allowed_keys() in r1.31, removing some dead code
+    
+    OpenBSD-Commit-ID: a493e628d4d6c08f878c276d998f4313ba61702d
 
-commit 3f9231c2e1f374ebb08016ba00ea97b47c0ed20b
+commit 3a7b110fbc7e096423f8f7b459deffe4c65d70f4
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Mar 7 05:37:26 2023 +0000
+Date:   Thu Apr 6 03:21:31 2023 +0000
 
-    upstream: fix memory leak in process_read() path; Spotted by James
+    upstream: remove redundant ssh!=NULL check; we'd already
     
-    Robinson in GHPR363; ok markus@
+    dereferenced it
     
-    OpenBSD-Commit-ID: cdc2d98e6478b7e7f3a36976845adae3820429d8
+    OpenBSD-Commit-ID: 852bf12591ec5a9fb12dcbde9b1fd3945ad0df3c
 
-commit c5e6e890839ec520ab9301a92cba56303749dea2
+commit 2519110659a1efac6c976895a86659d1b341c91b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Mar 7 01:30:52 2023 +0000
+Date:   Thu Apr 6 03:19:32 2023 +0000
 
-    upstream: correct size for array argument when changing
+    upstream: match_user() shouldn't be called with user==NULL unless
     
-    UMAC_OUTPUT_LEN Coverity CID 291845; ok dtucker@
+    host and ipaddr are also NULL
     
-    OpenBSD-Commit-ID: 2eb017d10705bb623d4418691f961c930eafaec0
+    OpenBSD-Commit-ID: fa3518346c21483e9e01a2e4b9436ae501daf8ea
 
-commit 9641753e0fd146204d57b2a4165f552a81afade4
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Mar 6 12:14:48 2023 +0000
+commit 3b9ceaad7ad63c1c03c2a89e148340ad3a62a482
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Apr 6 03:12:32 2023 +0000
 
-    upstream: Refactor creation of KEX proposal.
+    upstream: don't care about glob() return value here.
     
-    This adds kex_proposal_populate_entries (and corresponding free) which
-    populates the KEX proposal array with dynamically allocated strings.
-    This replaces the previous mix of static and dynamic that has been the
-    source of previous leaks and bugs.  Remove unused compat functions.
-    With & ok djm@.
-    
-    OpenBSD-Commit-ID: f2f99da4aae2233cb18bf9c749320c5e040a9c7b
+    OpenBSD-Commit-ID: 85bb82fea90478a482e9f65a1bec0aa24227fd66
 
-commit aa59d6a489fb20973fa461d0fdb1110db412947b
+commit 09d8da0849e2791b2500267cda333cd238f38754
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Mar 5 09:24:35 2023 +0000
+Date:   Mon Apr 3 08:10:54 2023 +0000
 
-    upstream: Fix mem and FILE leaks in moduli screening.
+    upstream: Move up null check and simplify process_escapes.
     
-    If multiple -Ocheckpoint= options are passed, the earlier ones would
-    be overwritten and leaked.  If we use an input file that wasn't stdin,
-    close that.  From Coverity CIDs 291884 and 291894.
+    Based on Coverity CID 291863 which points out we check the channel
+    pointer for NULLness after dereferencing it.  Move this to the start
+    of the function, and while there simplify initialization of efc a bit.
+    ok djm@
     
-    OpenBSD-Commit-ID: a4d9d15f572926f841788912e2b282485ad09e8b
+    OpenBSD-Commit-ID: de36e5ad6fde0fe263ca134e986b9095dc59380a
 
-commit 23b8cb41767af99a1aac24589d1882d9c8c2c205
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Mar 5 08:18:58 2023 +0000
+commit b36b162be5e6206f12b734222b7bc517c13a6bc8
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 31 14:51:20 2023 +1100
 
-    upstream: Plug mem leak in moduli checkpoint option parsing.
-    
-    From Coverity CID 291894.
+    need va_end() after va_copy(); ok dtucker
     
-    OpenBSD-Commit-ID: 9b1aba2d049741ae21c8dc4560a7e29ab17310f4
+    spotted by Coverity
 
-commit fc7f8f2188d4a4fc8ba77eddbe863c7665666db5
+commit f703757234a5c585553e72bba279b255a272750a
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Mar 5 05:34:09 2023 +0000
+Date:   Fri Mar 31 05:56:36 2023 +0000
 
-    upstream: Remove unused compat.h includes.
-    
-    We've previously removed a lot of the really old compatibility code,
-    and with it went the need to include compat.h in most of the files that
-    have it.
+    upstream: Explicitly ignore return from waitpid here too.
     
-    OpenBSD-Commit-ID: 5af8baa194be00a3092d17598e88a5b29f7ea2b4
+    OpenBSD-Commit-ID: eef2403df083c61028969fc679ee370373eacacb
 
-commit 6c165c36246d8004c20e1df5cec4961a5ac422d6
+commit 6b73aa29035991d1448a1a76f63ac152a6bf931c
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Mar 4 03:22:59 2023 +0000
+Date:   Fri Mar 31 04:45:08 2023 +0000
 
-    upstream: Use time_t for x11 timeout.
+    upstream: Explictly ignore return codes
     
-    Use time_t instead of u_int for remaining x11 timeout checks for 64bit
-    time_t safety.  From Coverity CIDs 405197 and 405028, ok djm@
+    where we don't check them.
     
-    OpenBSD-Commit-ID: 356685bfa1fc3d81bd95722d3fc47101cc1a4972
+    OpenBSD-Commit-ID: 1ffb03038ba1b6b72667be50cf5e5e396b5f2740
 
-commit 4a3918f51bd2d968387e7aa87e33b32c78077fb4
+commit 6f0308a3e717ebe68eeb3f95253612fab5dbf20e
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 3 10:23:42 2023 +0000
+Date:   Fri Mar 31 04:42:29 2023 +0000
 
-    upstream: Ensure ms_remain is always initialized
+    upstream: Return immediately from get_sock_port
     
-    similar to what we do in ssh_packet_write_wait.  bz#2687, from jjelen
-    at redhat.com.
+    if sock <0 so we don't call getsockname on a negative FD.  From Coverity
+    CID 291840, ok djm@
     
-    OpenBSD-Commit-ID: a50e0541cf823f8d1c72f71ccde925d3dbe6dfac
+    OpenBSD-Commit-ID: de1c1130646230c2eda559831fc6bfd1b61d9618
 
-commit e44846a4487d2885ac7f2610be09b1e2bf52249b
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 3 09:48:51 2023 +0000
+commit 1c1124dc901fca1ea2cb762044b8f1a5793a2bed
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Mar 31 04:23:02 2023 +0000
 
-    upstream: Check for non-NULL before string
+    upstream: don't leak arg2 on parse_pubkey_algos error path; ok
     
-    comparison. From jjelen at redhat.com via bz#2687.
+    dtucker@
     
-    OpenBSD-Commit-ID: 0d9b2e0cac88a311b5766b1aef737082583c285f
+    OpenBSD-Commit-ID: 7d0270ad3dd102412ca76add2b3760518abdef75
 
-commit 1842d523fae63b862ce8e60725c9b606cddb86a6
+commit 8ba2d4764bb6a4701cd447d8b52604622ffe65f4
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 3 05:00:34 2023 +0000
+Date:   Fri Mar 31 04:22:27 2023 +0000
 
-    upstream: guard against getsockname(-1, ...) from Coverity CID
-    
-    291832
+    upstream: clamp max number of GSSAPI mechanisms to 2048; ok dtucker
     
-    OpenBSD-Commit-ID: e58d5227327917d189229b7f0b37d2780f360d5f
+    OpenBSD-Commit-ID: ce66db603a913d3dd57063e330cb5494d70722c4
 
-commit 78571a5fe9847d40d7f220c92b707574ae9ec4ce
+commit 1883841fc13d0eada8743cac5d3abe142ee2efa7
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 3 04:36:20 2023 +0000
+Date:   Fri Mar 31 04:21:56 2023 +0000
 
-    upstream: some options are not first-match-wins. Mention that there
+    upstream: don't print key if printing hostname failed; with/ok
     
-    are exceptions at the start of the manpage and label some of them in the
-    option description.
+    dtucker@
     
-    OpenBSD-Commit-ID: 3b74728446fa6fc8742769eeb8c3674e233e84c4
+    OpenBSD-Commit-ID: ad42971a6ee5a46feab2d79f7f656f8cf4b119f3
 
-commit d1c1b3272e8895a96c4f5889bd6e07a8525bd9f1
+commit c6011129cafe4c411f6ef670a4cf271314708eb8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 3 04:34:49 2023 +0000
+Date:   Fri Mar 31 04:04:15 2023 +0000
 
-    upstream: actually print "channeltimeout none" in config dump mode;
-    
-    spotted via Coverity CID 405022
+    upstream: remove redundant test
     
-    OpenBSD-Commit-ID: b074b52bf138b75f08264e8da15880b29c7a630f
+    OpenBSD-Commit-ID: 6a0b719f9b1ae9d42ad8c5b144c7962c93792f7c
 
-commit 8bf61e95610b48192d4e1720cc15d9004617301d
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Mar 3 14:50:03 2023 +1100
+commit 4fb29eeafb40a2076c0dbe54e46b687c318f87aa
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Mar 31 04:00:37 2023 +0000
 
-    Add Coverity badges.
+    upstream: don't attempt to decode a ridiculous number of
+    
+    attributes; harmless because of bounds elsewhere, but better to be explicit
+    
+    OpenBSD-Commit-ID: 1a34f4b6896155b80327d15dc7ccf294b538a9f2
 
-commit 93291bd723959adf462b1df958106cf07a7734dd
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 3 03:12:24 2023 +0000
+commit fc437c154ef724621a4af236de9bc7e51a8381ae
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Mar 31 03:22:49 2023 +0000
 
-    upstream: Check return values of dup2. Spotted by Coverity, ok djm@
+    upstream: remove unused variable; prompted by Coverity CID 291879
     
-    OpenBSD-Commit-ID: 19fb1b53072826d00c67df677731d2f6c1dd602b
+    OpenBSD-Commit-ID: 4c7d20ef776887b0ba1aabcfc1b14690e4ad0a40
 
-commit e37261dff33af23f37202cfce0848d36f5c1055c
+commit 0eb8131e4a53b33a8fc9b9ab694e6b6778b87ade
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 3 02:37:58 2023 +0000
+Date:   Fri Mar 31 00:44:29 2023 +0000
 
-    upstream: Use time_t for x11_refuse_time timeout. We need
+    upstream: Check fd against >=0 instead of >0 in error path. The
     
-    SSH_TIME_T_MAX for this, so move from misc.c to misc.h so it's available.
-    Fixes a Coverity warning for 64bit time_t safety, ok djm@
+    dup could in theory return fd 0 although currently it doesn't in practice.
+    From Dmitry Belyavskiy vi github PR#238.
     
-    OpenBSD-Commit-ID: c69c4c3152cdaab953706db4ccf4d5fd682f7d8d
+    OpenBSD-Commit-ID: 4a95f3f7330394dffee5c749d52713cbf3b54846
 
-commit 32755a98c29114b13f4c9d47454bbb265b932ad7
+commit 7174ba6f8a431ca4257767a260fc50e204068242
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Mar 3 02:34:29 2023 +0000
+Date:   Thu Mar 30 07:19:50 2023 +0000
 
-    upstream: Check return value from fctnl and warn on failure.
+    upstream: Ignore return value from muxclient(). It normally loops
     
-    Spotted by Coverity, ok djm@
+    without returning, but it if returns on failure we immediately exit.
+    Coverity CID 405050.
     
-    OpenBSD-Commit-ID: 2097c7db3cf657f1e3a6c5077041bacc63143cab
+    OpenBSD-Commit-ID: ab3fde6da384ea588226037c38635a6b2e015295
 
-commit 5fc60e8246c36b8255f72a937ebe9787b39648c6
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 2 11:10:27 2023 +0000
+commit a4c1c2513e36f111eeaa1322c510067930e5e51e
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 31 14:17:22 2023 +1100
 
-    upstream: Remove SUDO in proxy command wrapper. Anything that needs
+    don't call connect() on negative socket
     
-    sudo is already run by it, and it breaks if root isn't in sudoers.
+    Coverity CID 405037
+
+commit 34ee842cdd981a759fe8f0d4a37521f9a1c63170
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Mar 30 03:05:01 2023 +0000
+
+    upstream: return SSH_ERR_KEY_NOT_FOUND if the allowed_signers file
     
-    OpenBSD-Regress-ID: 6cf22fda32a89c16915f31a6ed9bbdbef2a3bac9
+    is empty, not SSH_ERR_INTERNAL_ERROR. Also remove some dead code spotted
+    by Coverity; with/ok dtucker@
+    
+    OpenBSD-Commit-ID: 898a1e817cda9869554b1f586a434f67bcc3b650
 
-commit 0d514659b23a257247491179cfbb53a6dd64e164
+commit f108e77a9dc9852e72215af1bf27731c48434557
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 2 08:24:41 2023 +0000
+Date:   Thu Mar 30 00:49:37 2023 +0000
 
-    upstream: Fix breakage on dhgex test.
+    upstream: Remove dead code from inside if block.
     
-    This was due to the sshd logs being written to the wrong log file.
-    While there, make save_debug_logs less verbose, write the name of the
-    tarball to regress.log and use $SUDO to remove the old symlinks (which
-    shouldn't be needed, but won't hurt).  Initial problem spotted by anton@.
+    The only way the if statement can be true is if both dup()s fail, and
+    in that case the tmp2 can never be set. Coverity CID 291805, ok djm@
     
-    OpenBSD-Regress-ID: 9c44fb9cd418e6ff31165e7a6c1f9f11a6d19f5b
+    OpenBSD-Commit-ID: c0d6089b3fb725015462040cd94e23237449f0c8
 
-commit 860201201d4ae655702807966901682cff30a171
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 2 08:14:52 2023 +0000
+commit 05b8e88ebe23db690abbfb1a91111abea09cde08
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Mar 30 13:53:29 2023 +1100
 
-    upstream: Quote grep and log message better.
+    child_set_eng: verify both env pointer and count.
     
-    OpenBSD-Regress-ID: 3823d9063127169736aa274b1784cb28e15b64d4
+    If child_set env was called with a NULL env pointer and a non-zero count
+    it would end up in a null deref, although we don't currently do this.
+    Prompted by Coverity CID 291850, tweak & ok djm@
 
-commit 03a03c6002525f5ad9c8fc874a5d5826a35d9858
+commit 28f1b8ef9b84b8cd2f6c9889a0c60aa4a90dadfa
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Mar 2 06:41:56 2023 +0000
+Date:   Wed Mar 29 01:07:48 2023 +0000
 
-    upstream: Always call fclose on checkpoints.
+    upstream: Ignore return from sshpkt_disconnect
     
-    In the case of an fprintf failure we would not call fclose which would
-    leak the FILE pointer.  While we're there, try to clean up the temp file
-    on failure.  Spotted by Coverity, ok djm@
+    since we set our own return value for the function.  Coverity CID 291797,
+    ok djm@
     
-    OpenBSD-Commit-ID: 73c7ccc5d4fcc235f54c6b20767a2815408525ef
+    OpenBSD-Commit-ID: 710b57ba954c139240895e23feea41f203201f04
 
-commit 13fe8f9785e6d90400ce548939a0b0ddc11fcb3c
+commit c3da05d95922f5550bcc7815e799474d6a160175
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Mar 1 21:54:50 2023 +0000
+Date:   Wed Mar 29 00:59:08 2023 +0000
 
-    upstream: Remove old log symlinks
+    upstream: Plug potential mem leak in process_put.
     
-    before creating new ones. In -portable some platforms don't like
-    overwriting existing symlinks.
+    It allocates abs_dst inside a loop but only frees it on exit, so free
+    inside the loop if necessary.  Coverity CID 291837, ok djm@
     
-    OpenBSD-Regress-ID: 7e7ddc0beb73e945e1c4c58d51c8a125b518120f
+    OpenBSD-Commit-ID: a01616503a185519b16f00dde25d34ceaf4ae1a3
 
-commit 131fcbcaffd1e3bcf5ab766ec497b5d768955310
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Mar 1 23:23:02 2023 +1100
+commit 13ae327eae598b1043e5ec30e4b170edb3c898a5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Mar 29 00:18:35 2023 +0000
 
-    Adjust test jobs for new log directory.
+    upstream: fix memory leak; Coverity CID 291848
+    
+    with/ok dtucker@
+    
+    OpenBSD-Commit-ID: 37f80cb5d075ead5a00ad1b74175684ab1156ff8
 
-commit a6f4ac8a2baf77e5361cfa017d0dc250d1409bec
+commit 9ffa76e1284c85bf459c3dcb8e995733a8967e1b
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Mar 1 09:29:32 2023 +0000
+Date:   Tue Mar 28 07:44:32 2023 +0000
 
-    upstream: Rework logging for the regression tests.
+    upstream: Plug more mem leaks in sftp by making
     
-    Previously we would log to ssh.log and sshd.log, but that is insufficient
-    for tests that have more than one concurent ssh/sshd.
+    make_absolute_pwd_glob work in the same way as make_absolute: you
+    pass it a dynamically allocated string and it either returns it, or
+    frees it and allocates a new one. Patch from emaste at freebsd.org and
+    https://reviews.freebsd.org/D37253 ok djm@
     
-    Instead, we'll log to separate datestamped files in a $OBJ/log/ and
-    leave a symlink at the previous location pointing at the most recent
-    instance with an entry in regress.log showing which files were created
-    at each point.  This should be sufficient to reconstruct what happened
-    even for tests that use multiple instances of each program.  If the test
-    fails, tar up all of the logs for later analysis.
-    
-    This will let us also capture the output from some of the other tools
-    which was previously sent to /dev/null although most of those will be
-    in future commits.
-    
-    OpenBSD-Regress-ID: f802aa9e7fa51d1a01225c05fb0412d015c33e24
+    OpenBSD-Commit-ID: 85f7404e9d47fd28b222fbc412678f3361d2dffc
 
-commit 8ead62ed5e86c7df597d8604f332f49cd1527b85
+commit 82b2b8326962b1a98af279bc5bbbbbcab15b3e45
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Feb 28 21:31:50 2023 +0000
+Date:   Tue Mar 28 06:12:38 2023 +0000
 
-    upstream: fatal out if allocating banner string fails to avoid
+    upstream: Remove compat code for OpenSSL < 1.1.*
     
-    potential null deref later in sscanf.  Spotted by Coverity, ok deraadt@
+    since -portable no longer supports them.
     
-    OpenBSD-Commit-ID: 74e8d228ac00552e96e9e968dfcccf8dd1f46ad5
+    OpenBSD-Commit-ID: ea2893783331947cd29a67612b4e56f818f185ff
 
-commit 44ca56ba0b3f531f1d85730cc701097cd49e6868
+commit b500afcf00ae1b6b73b2ccf171111dfbfeaef74d
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Feb 28 08:45:24 2023 +0000
+Date:   Mon Mar 27 23:56:54 2023 +0000
 
-    upstream: Explicitly ignore return from fchmod
+    upstream: Remove compat code for OpenSSL 1.0.*
     
-    similar to other calls to prevent warning.
+    versions now that -portable has dropped support for those versions.
     
-    OpenBSD-Commit-ID: fdc5287dcee0860b5a493186414226c655b0eb0a
+    OpenBSD-Regress-ID: 82a8eacd87aec28e4aa19f17246ddde9d5ce7fe7
 
-commit 803392933a3a6f09f834aa5f0c2aab06a3b382f4
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Feb 27 22:12:40 2023 +0000
+commit 727560e6011efcb36d2f3ac6910444bc775abaa1
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Mar 28 18:06:42 2023 +1100
 
-    upstream: Plug mem leak on globbed ls error path.
-    
-     Spotted by Coverity, ok deraadt@
+    Prevent conflicts between Solaris SHA2 and OpenSSL.
     
-    OpenBSD-Commit-ID: de28476025db29820a9a2e56e98b964d8a02861c
+    We used to prevent conflicts between native SHA2 headers and OpenSSL's
+    by setting OPENSSL_NO_SHA but that was removed prior to OpenSSL 1.1.0
 
-commit aa33b4d396abf47a2a45f982f28d054fb1dcb5c3
+commit 46db8e14b7f186d32173dcdecd5b785334429b8b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 27 21:04:22 2023 +1100
+Date:   Tue Mar 28 12:44:03 2023 +1100
 
-    Cast time_t's in debug output to long long.
+    Remove HEADER_SHA_H from previous...
     
-    Should fix Coverity warning about truncation of 64bit time_t.
+    since it causes more problems than it solves.
 
-commit b0fd60a9de62a03189ad57d0c07f0ac51dc00e95
+commit 72bd68d37387aa5f81da928f6e82f1c88ed8f674
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 27 17:28:59 2023 +1100
+Date:   Tue Mar 28 10:35:18 2023 +1100
 
-    Do shadow expiry calcs using "long long".
+    Replace OPENSSL_NO_SHA with HEADER_SHA_H.
     
-    Coverity flags these as potentially not 64bit time_t safe so use
-    long long for the calculations and debug output.  ok djm@
+    Since this test doesn't use OpenSSL's SHA2 and may cause conflicts we
+    don't want to include it, but OPENSSL_NO_SHA was removed beginning in
+    OpenSSL's 1.1 series.
 
-commit 01dbeb3084d714bbd001ff9d03b9de542e8cdf58
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Feb 27 17:07:52 2023 +1100
+commit 99668f2e6e0deb833e46cfab56db59ff0fc28c7e
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Mar 28 09:50:06 2023 +1100
 
-    avoid clash between for getopt's struct option
-    
-    Since we don't use getopt_long() nothing outside the getopt()
-    implementation itself uses this structure, so move it into the
-    source to remove it from visibility and clashes with libc's
-    
-    ok dtucker@
+    Configure with --target instead of deprecated form.
 
-commit eb88d07c43afe407094e7d609248d85a15e148ef
+commit f751d9306c62cd1061f966e6a7483d9bab9c379b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 25 14:45:41 2023 +1100
+Date:   Mon Mar 27 22:05:29 2023 +1100
 
-    Revert explicit chmods on private keys.
-    
-    This should no longer be needed on Cygwin test runners due to previous
-    commit.
+    Pass rpath when building 64bit Solaris.
 
-commit 52b75db61030a6c8baf66b73644380cf3f58e26a
+commit a64b935cd450ee8d04c26c9cd728629cf9ca5c91
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 25 14:43:28 2023 +1100
+Date:   Mon Mar 27 19:21:19 2023 +1100
 
-    Remove extended ACLs from working dirs.
+    Explicitly disable OpenSSL on AIX test VM.
+
+commit 7ebc6f060fc2f70495a56e16d210baae6424cd96
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Mar 27 03:56:50 2023 +0000
+
+    upstream: Add RevokedHostKeys to percent expansion test.
     
-    This should allow umask to work as expected and prevent tests from
-    failing due to excessive permissions on private keys.
+    OpenBSD-Regress-ID: c077fd12a38005dd53d878c5b944154dec88d2ff
 
-commit 0c5d4c843df5605b043a758d69f9a611ef63c479
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 24 13:44:13 2023 +1100
+commit f1a17de150f8d309d0c52f9abfaebf11c51a8537
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Mar 27 03:56:11 2023 +0000
 
-    Explicitly set permissions on user and host keys.
+    upstream: Add tilde and environment variable expansion to
     
-    On cygwin, the umask might not be sufficient.  Should fix tests on
-    Github runners.
+    RevokedHostKeys. bz#3552, ok djm@
+    
+    OpenBSD-Commit-ID: ce5d8e0219b63cded594c17d4c2958c06918ec0d
 
-commit 6c9fc9d7a9f7abf82c3294d74e6d4a25735862ce
+commit 009eb4cb48a9708ab9174684dcbcc0f942907abe
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 22 03:56:43 2023 +0000
+Date:   Mon Mar 27 03:31:05 2023 +0000
 
-    upstream: fix progressmeter corruption on wide displays; bz3534
+    upstream: fix test: getnameinfo returns a non-zero value on error, not
     
-    feedback/ok dtucker@
+    (neccessarily) -1. From GHPR#384
     
-    OpenBSD-Commit-ID: f4affee067cec7c182f3e0b307d758e0472762a3
+    OpenBSD-Commit-ID: d35e2b71268f66f5543a7ea68751972b3ae22b25
 
-commit fe0bd3cde9665d364e5eedd2c2c2e60d4cdc3786
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Feb 21 06:48:18 2023 +0000
+commit 4f0a676486700f10a4788f7e9426e94e39c1c89e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Mar 27 03:25:08 2023 +0000
 
-    upstream: fseek to end of known_hosts before writing to it.
+    upstream: scp: when copying local->remote, check that source file
     
-    POSIX and ANSI C require that applications call fseek or similar between
-    read and writing to a RW file.  OpenBSD doesn't enforce this, but some
-    (System V derived) platforms need this to prevent it from writing a
-    spurious extra byte (in this case, a newline).  ok djm@ deraadt@
+    exists before opening SFTP connection to the server. Based on GHPR#370 ok
+    dtucker, markus
     
-    OpenBSD-Commit-ID: 33e680dcd8110582a93a40a8491024e961f45137
+    OpenBSD-Commit-ID: b4dd68e15bfe22ce4fac9960a1066a2b721e54fb
 
-commit 357fb8ae14c07cd025eeed66e73de91bab569849
+commit 154d8baf631327163571760c2c524bc93c37567c
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 21 17:51:09 2023 +1100
+Date:   Mon Mar 27 12:22:30 2023 +1100
 
-    Also run unit tests on AIX VMs.
-    
-    In the past these tests took too long, but these days it only adds
-    about 5 min to the run.
+    Also look for gdb error message from OpenIndiana.
 
-commit 17781aaa5188ee1477f7779b280d105512e3dbed
+commit fbd3811ddb2b6ce2e6dba91fde7352c8978e5412
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 21 17:38:55 2023 +1100
+Date:   Mon Mar 27 11:08:00 2023 +1100
 
-    Wrap stdint.h inside ifdef.
+    Explicitly disable security key test on aix51 VM.
+    
+    We don't know how to build the shared objects required for the security
+    key tests so skip them.
 
-commit ef798bad38505f7bf1b5fa5c0843dfc5a2b192b9
-Author: Mayank Sharma <mayank.fit2010@gmail.com>
-Date:   Mon Feb 20 17:37:15 2023 +0530
+commit 4922ac3be8a996780ef3dc220411da2e27c29d9c
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Mar 26 14:49:43 2023 +1100
 
-    Add includes to ptimeout test.
+    Split libcrypto and other config flags.
     
-    Fixes test failures on AIX due to type mismatches.
+    This should allow the automatic OpenSSL version selection in the tests
+    to work better.
 
-commit ab69dda05d5268454209f529fa80f477e60d846a
+commit 4a948b1469f185e871160a2d70e2a0fce2858f9e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 20 18:24:39 2023 +1100
+Date:   Sun Mar 26 14:39:45 2023 +1100
 
-    Always use the openssl binary configure tells us.
+    Specify test target if we build without OpenSSL.
     
-    This fixes tests on platforms that do not have the openssl tool
-    installed at all.
+    When we decide we can't use the versions of OpenSSL available, also
+    restrict the tests we run to avoid the ones that need OpenSSL.
 
-commit 2a7e3449908571af601a4c2d12ab140096442e47
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 17 04:22:50 2023 +0000
+commit b308c636f5b5d89eecb98be00b3d56306a005a09
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Mar 26 14:22:53 2023 +1100
 
-    upstream: Remove now-unused compat bit SSH_BUG_RSASIGMD5. The code
-    
-    to set this was removed in OpenSSH 7.7 when support for SSH implementations
-    dating back to before RFC standardization were removed.  "burn it all" djm@
+    Find suitable OpenSSL version.
     
-    OpenBSD-Commit-ID: 6330935fbe23dd00be79891505e06d1ffdac7cda
+    Check the installed OpenSSL versions for a suitable one, and if there
+    isn't (and we don't have a specific version configured) then build
+    without OpenSSL.
 
-commit 0833ccf2c8b7ae08b296c06f17bd53e3ab94b0b0
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 17 03:06:18 2023 +0000
+commit 021ea5c2860f133f44790970968e0e73208b3a87
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 24 15:02:52 2023 +1100
 
-    upstream: Remove now-unused compat bit SSH_BUG_BIGENDIANAES. This
-    
-    was previously set for OpenSSH 2.3 (released in 2000) but this check was
-    removed in OpenSSH 7.7 (2018).  ok djm@ deraadt@
-    
-    OpenBSD-Commit-ID: 326426ea328707fc9e83305291ab135c87f678af
+    Github testing support for BoringSSL
 
-commit c81c2bea6e828d52b62b448b4ffdd3c163177975
+commit 9a97cd106466a2a9bda2bfaa4c48c4f1b2cc9c1b
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Feb 17 10:12:40 2023 +1100
+Date:   Fri Mar 24 15:34:29 2023 +1100
 
-    whitespace fixes
+    BoringSSL doesn't support EC_POINT_point2bn()
+    
+    so don't invoke it in unittest
 
-commit 500f90b39db5f0014e6b0c49ff1f45c994b69293
+commit cc5969c033a032d126ff78e5d95cf20abbede4c7
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Feb 17 10:02:08 2023 +1100
+Date:   Fri Mar 24 15:34:05 2023 +1100
 
-    whitespace at EOL
+    another ERR_load_CRYPTO_strings() vestige
 
-commit 68350152406339170721c15e97afdf827a5e4001
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Feb 16 10:10:00 2023 +0000
+commit 4974293899a068133e976f81d6693670d2b576ca
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 24 15:24:05 2023 +1100
 
-    upstream: Remove SSH_BUG_PASSWORDPAD compat bit
-    
-    since it's no longer used. ok markus@
+    don't use obsolete ERR_load_CRYPTO_strings()
     
-    OpenBSD-Commit-ID: b92c21f56fe4b7f9a54790d6a9650725c226820b
+    OpenSSL (and elsewhere in OpenSSH) uses ERR_load_crypto_strings()
 
-commit 537cccd804eaf65f32bdce037cc31db4e0ab0f44
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Feb 16 07:55:15 2023 +0000
+commit 3c527d55f906e6970d17c4cab6db90ae9e013235
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 24 15:23:05 2023 +1100
 
-    upstream: Remove SSH_BUG_IGNOREMSG compat flag
-    
-    since it's only applicable to SSH1 and thus no longer used.  ok markus@
-    "kill it with fire" djm@
-    
-    OpenBSD-Commit-ID: ea13318b1937795d9db4790d3ce0a6ed01584dab
+    Allow building with BoringSSL
 
-commit 285cf6cd4b91a0a0ce33193c358c99085af33e43
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Feb 10 06:41:53 2023 +0000
+commit b7e27cfd7f163fc16b4c5d041cc28ee488a5eeec
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 24 15:21:18 2023 +1100
 
-    upstream: space between macro and punctuation; sort usage();
+    put back SSLeay_version compat in configure test
     
-    OpenBSD-Commit-ID: 6141610cfca037700730e41f868d1d9124958f8c
-
-commit d39a96f70f81878c77336ed35f5c648c1804b71a
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Feb 10 06:40:48 2023 +0000
+    Needed to detect old versions and give good "your version is bad"
+    messages at configure time; spotted by dtucker@
 
-    upstream: space between macro and punctuation;
+commit 7280401bdd77ca54be6867a154cc01e0d72612e0
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Mar 24 13:56:25 2023 +1100
+
+    remove support for old libcrypto
     
-    OpenBSD-Commit-ID: abc95e550be9e6d9a7ff64b65c104c7be21ab19e
+    OpenSSH now requires LibreSSL 3.1.0 or greater or
+    OpenSSL 1.1.1 or greater
+    
+    with/ok dtucker@
 
-commit 16e82bf53fc34e43e3b948d43b68d5b27a7335e6
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Feb 10 06:39:27 2023 +0000
+commit abda22fb48302f2142233f71d27c74040288c518
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Mar 19 15:36:13 2023 +1100
 
-    upstream: sort SYNOPSIS;
-    
-    OpenBSD-Commit-ID: dacd9da33277d5669a51213d880632599c890c1e
+    Test latest OpenSSL 1.1, 3.0 and LibreSSL 3.7.
 
-commit d9685121ff6d57b8797411f3cb123884a4b96e30
+commit 610ac1cb077cd5a1ebfc21612154bfa13d2ec825
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 11 12:32:19 2023 +1100
+Date:   Thu Mar 16 21:38:04 2023 +1100
 
-    Improve seccomp compat on older systems.
-    
-    Check if flags to mmap and madvise are defined before using them.
-    Should fix problems building on older Linux systems that don't have
-    these.  bz#3537, with & ok djm@.
+    Show 9.3 branch instead of 9.2.
 
-commit 6180b0fa4f7996687678702806257e661fd5931e
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Feb 10 05:06:03 2023 +0000
+commit cb30fbdbee869f1ce11f06aa97e1cb8717a0b645
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Mar 16 08:28:19 2023 +1100
 
-    upstream: test -Ohashalg=... and that the default output contains both
-    
-    specified hash algorithms; prompted by dtucker@
-    
-    OpenBSD-Regress-ID: 26f309208c8d8b8fa9c5f419767b85f1e9b22f51
+    depend
 
-commit d651f5c9fe37e61491eee46c49ba9fa03dbc0e6a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Feb 10 04:56:30 2023 +0000
+commit 1dba63eb10c40b6fda9f5012ed6ae87e2d3d028e
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Mar 16 08:27:54 2023 +1100
 
-    upstream: let ssh-keygen and ssh-keyscan accept
-    
-    -Ohashalg=sha1|sha256 when outputting SSHFP fingerprints to allow algorithm
-    selection. bz3493 ok dtucker@
-    
-    OpenBSD-Commit-ID: e6e07fe21318a873bd877f333e189eb963a11b3d
+    crank version
 
-commit 18938d11a90b74d63c20b2d3c965d5bd64786ab1
+commit ba7532d0dac9aaf0ad7270664c43837fc9f64a5f
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Feb 10 04:47:19 2023 +0000
+Date:   Wed Mar 15 21:19:57 2023 +0000
 
-    upstream: add a `sshd -G` option that parses and prints the
-    
-    effective configuration without attempting to load private keys and perform
-    other checks. This allows usage of the option before keys have been
-    generated.
-    
-    bz3460 feedback/ok dtucker@
+    upstream: openssh-9.3
     
-    OpenBSD-Commit-ID: 774504f629023fc25a559ab1d95401adb3a7fb29
+    OpenBSD-Commit-ID: 8011495f2449c1029bb316bd015eab2e00509848
 
-commit df7d3dbf7194db8e97730ee0425d4d9d7bdb8b10
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Feb 10 04:40:28 2023 +0000
+commit 6fd4daafb949b66bf555f3100f715a9ec64c3390
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Mar 14 07:28:47 2023 +0000
 
-    upstream: make `ssh -Q CASignatureAlgorithms` work as the manpage says
+    upstream: Free KRL ptr in addition to its contents.
     
-    it should bz3532
+    From Coverity CID 291841, ok djm@
     
-    OpenBSD-Commit-ID: 0ddb17b3fcbd99bfb5baea4ac5e449620cbd3adc
-
-commit d3b8d4198b6595f23b5859d43dc8fc701f97429b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 10 14:26:44 2023 +1100
-
-    Add CentOS 7 test targets.
+    OpenBSD-Commit-ID: f146ba08b1b43af4e0d7ad8c4dae3748b4fa31b6
 
-commit 22efb01e355bba4755b730ed417f91c081445bfc
+commit 1d270bd303afaf6d94e9098cbbf18e5e539e2088
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Feb 9 09:55:33 2023 +0000
+Date:   Tue Mar 14 07:26:25 2023 +0000
 
-    upstream: Test adding terminating newline to known_hosts.
+    upstream: Check pointer for NULL before deref.
     
-    OpenBSD-Regress-ID: 5fc3010ac450195b3fbdeb68e875564968800365
+    None of the existing callers seem to do that, but it's worth checking.
+    From Coverity CID 291834, ok djm@
+    
+    OpenBSD-Commit-ID: a0a97113f192a7cb1a2c97b932f677f573cda7a4
 
-commit caec6da1a583ed8c32c6ad3b81bbcaab46ac8b61
+commit d95af508e78c0cd3dce56b83853baaa59ae295cf
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Feb 8 08:06:03 2023 +0000
+Date:   Sun Mar 12 10:40:39 2023 +0000
 
-    upstream: ssh-agent doesn't actually take -v,
+    upstream: Limit number of entries in SSH2_MSG_EXT_INFO
     
-    so the recently-added ones will result in the test not cleaning up
-    after itself.  Patch from cjwatson at debian.org vi bz#3536.
+    request. This is already constrained by the maximum SSH packet size but this
+    makes it explicit.  Prompted by Coverity CID 291868, ok djm@ markus@
     
-    OpenBSD-Regress-ID: 1fc8283568f5bf2f918517c2c1e778072cf61b1a
+    OpenBSD-Commit-ID: aea023819aa44a2dcb9dd0fbec10561896fc3a09
 
-commit 3c379c9a849a635cc7f05cbe49fe473ccf469ef9
+commit 8f287ba60d342b3e2f750e7332d2131e3ec7ecd0
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Feb 9 09:54:11 2023 +0000
+Date:   Sun Mar 12 09:41:18 2023 +0000
 
-    upstream: Ensure that there is a terminating newline when adding a new
+    upstream: calloc can return NULL but xcalloc can't.
     
-    entry to known_hosts.  bz#3529, with git+openssh at limpsquid.nl, ok deraadt@
-    markus@
+    From Coverity CID 291881, ok djm@
     
-    OpenBSD-Commit-ID: fa8d90698da1886570512b96f051e266eac105e0
-
-commit 95b6bbd2553547260b324b39d602061c88b774bc
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 7 08:43:47 2023 +1100
-
-    Replace 9.1 with 9.2 on CI status page.
+    OpenBSD-Commit-ID: 50204b755f66b2ec7ac3cfe379d07d85ca161d2b
 
-commit 195313dfe10a23c82e9d56d5fdd2f59beee1bdcf
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Feb 3 16:33:09 2023 +1100
+commit 83a56a49fd50f4acf900f934279482e4ef329715
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 10 07:17:08 2023 +0000
 
-    harden Linux seccomp sandbox
-    
-    Linux mmap(2) and madvise(2) syscalls support quite a number of funky
-    flags that we don't expect that sshd/libc will ever need. We can
-    exclude this kernel attack surface by filtering the mmap(2) flags
-    and the madvise(2) advice arguments.
-    
-    Similarly, the sandboxed process in sshd is a single-threaded program
-    that does not use shared memory for synchronisation or communication.
-    Therefore, there should be no reason for the advanced priority
-    inheritance futex(2) operations to be necessary. These can also be
-    excluded.
+    upstream: Explicitly ignore return from fcntl
     
-    Motivated by Jann Horn pointing out that there have been kernel bugs
-    in nearby Linux kernel code, e.g. CVE-2020-29368, CVE-2020-29374 and
-    CVE-2022-42703.
+    (... FD_CLOEXEC) here too.  Coverity CID 291853.
     
-    Feedback Jann Horn, ok dtucker@
-
-commit 6dfb65de949cdd0a5d198edee9a118f265924f33
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Feb 2 23:21:54 2023 +1100
-
-    crank versions in RPM specs
+    OpenBSD-Commit-ID: 99d8b3da9d0be1d07ca8dd8e98800a890349e9b5
 
-commit d07cfb11a0ca574eb68a3931d8c46fbe862a2021
+commit 0fda9d704d3bbf54a5e64ce02a6fecb11fe7f047
 Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Feb 2 23:21:45 2023 +1100
+Date:   Fri Mar 10 15:59:46 2023 +1100
 
-    update version in README
+    bounds checking for getrrsetbyname() replacement;
+    
+    Spotted by Coverity in CID 405033; ok millert@
 
-commit 9fe207565b4ab0fe5d1ac5bb85e39188d96fb214
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Feb 2 23:17:49 2023 +1100
+commit 89b8df518f21677045599df0ad3e5dd0f39909b5
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 10 04:06:21 2023 +0000
 
-    adapt compat_kex_proposal() test to portable
+    upstream: Plug mem leak on error path. Coverity CID 405026, ok djm@.
+    
+    OpenBSD-Commit-ID: 8212ca05d01966fb5e72205c592b2257708a2aac
 
-commit 903c556b938fff2d7bff8da2cc460254430963c5
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Feb 2 12:12:52 2023 +0000
+commit bf4dae0ad192c3e2f03f7223834b00d88ace3d3e
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Mar 10 14:46:57 2023 +1100
 
-    upstream: test compat_kex_proposal(); by dtucker@
+    Add prototypes for mkstemp replacements.
     
-    OpenBSD-Regress-ID: 0e404ee264db546f9fdbf53390689ab5f8d38bf2
+    Should prevent warnings due to our wrapper function.
 
-commit 405fba71962dec8409c0c962408e09049e5624b5
+commit 4e04d68d6a33cdc73b831fd4b5e6124175555d3d
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jan 19 07:53:45 2023 +0000
+Date:   Fri Mar 10 03:01:51 2023 +0000
 
-    upstream: Check if we can copy sshd or need to use sudo to do so
+    upstream: Expliticly ignore return code from fcntl(.. FD_CLOEXEC) since
     
-    during reexec test. Skip test if neither can work.  Patch from anton@, tweaks
-    from me.
+    there's not much we can do anyway.  From Coverity CID 291857, ok djm@
     
-    OpenBSD-Regress-ID: 731b96ae74d02d5744e1f1a8e51d09877ffd9b6d
+    OpenBSD-Commit-ID: 051429dd07af8db3fec10d82cdc78d90bb051729
 
-commit b2a2a8f69fd7737ea17dc044353c514f2f962f35
+commit d6d38fd77cbe091c59e1bb720c3a494df4990640
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Feb 2 12:10:22 2023 +0000
+Date:   Fri Mar 10 02:32:04 2023 +0000
 
-    upstream: openssh-9.2
+    upstream: Like sshd_config, some ssh_config options are not
     
-    OpenBSD-Commit-ID: f7389f32413c74d6e2055f05cf65e7082de03923
+    first-match-wins. sshd_config.5 was fixed in r1.348, this is the same for
+    this file
+    
+    OpenBSD-Commit-ID: 7be55b9351cde449b136afcc52d07aa4113b215e
 
-commit 12da7823336434a403f25c7cc0c2c6aed0737a35
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Feb 2 12:10:05 2023 +0000
+commit 7187d3f86bf8f2066cc9941f217d23b0cacae25e
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 10 02:24:56 2023 +0000
 
-    upstream: fix double-free caused by compat_kex_proposal(); bz3522
+    upstream: Remove no-op (int) > INT_MAX checks
     
-    by dtucker@, ok me
+    since they can never be true. From Coverity CID 405031, ok djm@
     
-    OpenBSD-Commit-ID: 2bfc37cd2d41f67dad64c17a64cf2cd3806a5c80
+    OpenBSD-Commit-ID: 9df3783b181e056595e2bb9edf7ed41d61cf8e84
 
-commit 79efd95ab5ff99f4cb3a955e2d713b3f54fb807e
+commit 77adde4305542ebe3005dd456122624fe2347b01
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Feb 1 17:17:26 2023 +1100
+Date:   Fri Mar 10 13:27:29 2023 +1100
 
-    Skip connection-timeout test on minix3.
+    Wrap mkstemp calls with umask set/restore.
     
-    Minix 3's Unix domain sockets don't seem to work the way we expect, so
-    skip connection-timeout test on that platform.  While there, group
-    together all similarly skipped tests and explicitly comment.
+    glibc versions 2.06 and earlier did not set a umask on files created by
+    mkstemp created the world-writable.  Wrap mkstemp to set and restore
+    the umask.  From Coverity (CIDs 291826 291886 291891), ok djm@
 
-commit 6b508c4e039619842bcf5a16f8a6b08dd6bec44a
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Feb 1 12:12:05 2023 +1100
+commit 633d3dc2a1e9e2a013d019a0576a0771c8423713
+Author: jcs@openbsd.org <jcs@openbsd.org>
+Date:   Thu Mar 9 21:06:24 2023 +0000
 
-    fix libfido2 detection without pkg-config
+    upstream: modify parentheses in conditionals to make it clearer what is
     
-    Place libfido2 before additional libraries (that it may depend upon)
-    and not after. bz3530 from James Zhang; ok dtucker@
-
-commit 358e300fed5e6def233a2c06326e51e20ebed621
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Wed Jan 18 20:56:36 2023 +0000
-
-    upstream: delete useless dependency
+    being assigned and what is being checked
     
-    OpenBSD-Commit-ID: e1dc11143f83082e3154d6094f9136d0dc2637ad
+    ok djm dtucker
+    
+    OpenBSD-Commit-ID: 19c10baa46ae559474409f75a5cb3d0eade7a9b8
 
-commit a4cb9be1b021b511e281ee55c356f964487d9e82
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Wed Jan 18 20:43:15 2023 +0000
+commit 733030840c4772f858de95d5940ec0c37663e8b0
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Mar 9 07:11:05 2023 +0000
 
-    upstream: Create and install sshd random relink kit.
+    upstream: Re-split the merge of the reorder-hostkeys test.
     
-    ../Makefile.inc and Makfile are concatenated for reuse, which hopefully won't
-    be too fragile, we'll see if we need a different approach. The resulting sshd
-    binary is tested with the new sshd -V option before installation.  As the
-    binary layout is now semi-unknown (meaning relative, fixed, and gadget
-    offsets are not precisely known), change the filesystem permissions to 511 to
-    prevent what I call "logged in BROP". I have ideas for improving this further
-    but this is a first step ok djm
+    In the kex_proposal_populate_entries change I merged the the check for
+    reordering hostkeys with the actual reordering, but kex_assemble_names
+    mutates options.hostkeyalgorithms which renders the check ineffective.
+    Put the check back where it was.  Spotted and tested by jsg@, ok djm@
     
-    OpenBSD-Commit-ID: 1e0a2692b7e20b126dda60bf04999d1d30d959d8
+    OpenBSD-Commit-ID: a7469f25a738db5567395d1881e32479a7ffc9de
 
-commit bc7de6f91a9a0ae2f148a9d31a4027d441a51999
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Wed Jan 18 06:55:32 2023 +0000
+commit 54ac4ab2b53ce9fcb66b8250dee91c070e4167ed
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Mar 9 06:58:26 2023 +0000
 
-    upstream: tweak previous; ok djm
+    upstream: include destination constraints for smartcard keys too.
     
-    OpenBSD-Commit-ID: df71ce4180c58202dfdc1d92626cfe900b91b7c3
+    Spotted by Luci Stanescu; ok deraadt@ markus@
+    
+    OpenBSD-Commit-ID: add879fac6903a1cb1d1e42c4309e5359c3d870f
 
-commit a20b7e999773e6333c8aa9b0a7fa41966e63b037
+commit bfd1ad01d974a316b60622759ad17537fa2d92b4
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jan 31 19:35:44 2023 +1100
+Date:   Thu Mar 9 18:24:54 2023 +1100
 
-    Skip connection-timeout test under Valgrind.
+    Limit the number of PAM environment variables.
     
-    Valgrind slows things down so much that the timeout test fails.  Skip
-    this test until we figure out if we can make it work.
+    xcalloc has its own limits, but these are specific to PAM.  From
+    Coverity CID 405198, ok djm@
 
-commit c3ffb54b4fc5e608206037921db6ccbc2f5ab25f
+commit a231414970e01a35f45a295d5f93698fa1249b28
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jan 25 21:58:40 2023 +1100
+Date:   Thu Mar 9 18:19:44 2023 +1100
 
-    Skip connection-timeout when missing FD passing.
+    Limit the number of PAM environment variables.
     
-    This tests uses multiplexing which uses file descriptor passing, so
-    skip it if we don't have that.  Fixes test failures on Cygwin.
+    From Coverity CID 405194, tweaks and ok djm@
 
-commit 35253af01d8c0ab444c8377402121816e71c71f5
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 18 02:00:10 2023 +0000
+commit 36c6c3eff5e4a669ff414b9daf85f919666e8e03
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Mar 8 06:21:32 2023 +0000
 
-    upstream: when restoring non-blocking mode to stdio fds, restore
-    
-    exactly the flags that ssh started with and don't just clobber them with
-    zero, as this could also remove the append flag from the set;
-    
-    bz3523; ok dtucker@
+    upstream: Plug mem leak. Coverity CID 405196, ok djm@
     
-    OpenBSD-Commit-ID: 1336b03e881db7564a4b66014eb24c5230e9a0c0
+    OpenBSD-Commit-ID: 175f09349387c292f626da68f65f334faaa085f2
 
-commit 7d17ea151c0b2519f023bd9cc7f141128833ac47
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Wed Jan 18 01:50:21 2023 +0000
+commit dfb9b736e1ccf9e6b03eea21cd961f4fd0634c98
+Author: tb@openbsd.org <tb@openbsd.org>
+Date:   Wed Mar 8 05:33:53 2023 +0000
 
-    upstream: Add a -V (version) option to sshd like the ssh client
+    upstream: ssh-pkcs11: synchronize error messages with errors
     
-    has. OK markus@ deraadt@
+    A handful of error messages contained incorrect function names or
+    otherwise inaccurate descriptions. Fix them to match reality.
     
-    OpenBSD-Commit-ID: abe990ec3e636fb040132aab8cbbede98f0c413e
+    input/ok djm
+    
+    OpenBSD-Commit-ID: 165a15db52f75b31e1804b043480c36af09f3411
 
-commit 62360feb7f08f2a4c6fc36f3b3449309203c42c9
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Tue Jan 17 18:52:44 2023 +0000
+commit 51875897b81b5c21b80c256a29597916edbde454
+Author: guenther@openbsd.org <guenther@openbsd.org>
+Date:   Wed Mar 8 04:43:12 2023 +0000
 
-    upstream: For "ssh -V" always exit 0, there is no need to check opt
+    upstream: Delete obsolete /* ARGSUSED */ lint comments.
     
-    again. This was missed when the fallthrough in the switch case above it was
-    removed.  OK deraadt@
+    ok miod@ millert@
     
-    OpenBSD-Commit-ID: 5583e5d8f6d62a8a4215cfa95a69932f344c8120
+    OpenBSD-Commit-ID: 7be168a570264d59e96a7d2d22e927d45fee0e4c
 
-commit 12492c0abf1eb415d08a897cc1d8b9e789888230
+commit a76085bda883c2104afb33ab0334eca190927362
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Mar 8 17:25:37 2023 +1100
+
+    Extra brackets to prevent warning.
+
+commit 147ae57d4dfa0508109f93b78a7d8b92819e1f83
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 17 10:15:10 2023 +0000
+Date:   Wed Mar 8 00:05:58 2023 +0000
 
-    upstream: also check that an active session inhibits
+    upstream: use RSA/SHA256 when testing usability of private key in
     
-    UnusedConnectionTimeout idea markus@
+    agent; with/ok dtucker
     
-    OpenBSD-Regress-ID: 55c0fb61f3bf9e092b0a53f9041d3d2012f14003
+    OpenBSD-Commit-ID: fe1382e2fdf23fcae631308e72342bad56066a56
 
-commit cef2593c33ac46a58238ff998818754eabdf64ff
+commit 27fd251bc906a763e70ce0f27c8abdf8bbd1e416
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 17 10:02:34 2023 +0000
+Date:   Wed Mar 8 00:05:37 2023 +0000
 
-    upstream: regression test for UnusedConnectionTimeout
+    upstream: use RSA/SHA256 when testing usability of private key;
     
-    OpenBSD-Regress-ID: 7f29001374a68e71e5e078f69e4520cf4bcca084
+    based on fix in bz3546 by Dmitry Belyavskiy; with/ok dtucker
+    
+    OpenBSD-Commit-ID: 0ef414cc363a832f9fab92a5da0234448bce2eba
 
-commit aff9493a89c71d6a080419b49ac64eead9730491
+commit eee9f3fc3d52ae7d2106929bb06b7f291fb0b81a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 16 04:11:29 2023 +0000
+Date:   Tue Mar 7 21:47:42 2023 +0000
 
-    upstream: unbreak test: cannot access shell positional parameters
+    upstream: refactor to be more readable top to bottom. Prompted by
     
-    past $9 without wrapping the position in braces (i.e. need ${10}, etc.)
+    Coverity CID 405048 which was a false-positive fd leak; ok dtucker@
     
-    OpenBSD-Regress-ID: 3750ec98d5d409ce6a93406fedde6f220d2ea2ac
+    OpenBSD-Commit-ID: fc55ec2af622a017defb9b768bf26faefc792c00
 
-commit 0293c19807f83141cdf33b443154459f9ee471f6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 17 09:44:48 2023 +0000
+commit 42a06b29a4c99272bf690f9b3be520b08b448dc5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Mar 7 18:34:41 2023 +1100
 
-    upstream: Add a sshd_config UnusedConnectionTimeout option to terminate
-    
-    client connections that have no open channels for some length of time. This
-    complements the recently-added ChannelTimeout option that terminates inactive
-    channels after a timeout.
+    Add header changes missed in previous.
+
+commit 4710077096edff2e6926dd5b15bf586491d317db
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Mar 7 06:09:14 2023 +0000
+
+    upstream: Fix mem leak in environment setup.
     
-    ok markus@
+    From jjelen at redhat.com via bz#2687, ok djm@
     
-    OpenBSD-Commit-ID: ca983be74c0350364c11f8ba3bd692f6f24f5da9
+    OpenBSD-Commit-ID: 9f9e4ba3cac003e6f81da3bcebd1b9ec43e7f353
 
-commit 8ec2e3123802d2beeca06c1644b0b647f6d36dab
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Jan 15 23:35:10 2023 +0000
+commit 03acc50d0ccb78fc91d1570de1cd0fdfea646028
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Mar 6 12:15:47 2023 +0000
 
-    upstream: adapt to ed25519 changes in src/usr.bin/ssh
+    upstream: Unit test for kex_proposal_populate_entries.
     
-    OpenBSD-Regress-ID: 4b3e7ba7ee486ae8a0b4790f8112eded2bb7dcd5
+    OpenBSD-Regress-ID: bdb211d80d572a08bf14b49fe2a58b9ff265c006
 
-commit 9fbbfeca1ce4c7ec0001c827bbf4189a3ba0964b
+commit 3f9231c2e1f374ebb08016ba00ea97b47c0ed20b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Jan 15 23:05:32 2023 +0000
+Date:   Tue Mar 7 05:37:26 2023 +0000
 
-    upstream: update OpenSSH's Ed25519 code to the last version of SUPERCOP
-    
-    (20221122) and change the import approach to the same one we use for
-    Streamlined NTRUPrime: use a shell script to extract the bits we need from
-    SUPERCOP, make some minor adjustments and squish them all into a single file.
+    upstream: fix memory leak in process_read() path; Spotted by James
     
-    ok tb@ tobhe@
+    Robinson in GHPR363; ok markus@
     
-    OpenBSD-Commit-ID: 1bc0fd624cb6af440905b8ba74ac7c03311b8e3b
+    OpenBSD-Commit-ID: cdc2d98e6478b7e7f3a36976845adae3820429d8
 
-commit 6283f4bd83eee714d0f5fc55802eff836b06fea8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jan 14 22:02:44 2023 +1100
+commit c5e6e890839ec520ab9301a92cba56303749dea2
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Mar 7 01:30:52 2023 +0000
 
-    Allow writev is seccomp sandbox.
+    upstream: correct size for array argument when changing
     
-    This seems to be used by recent glibcs at least in some configurations.
-    From bz#3512, ok djm@
+    UMAC_OUTPUT_LEN Coverity CID 291845; ok dtucker@
+    
+    OpenBSD-Commit-ID: 2eb017d10705bb623d4418691f961c930eafaec0
 
-commit 923c3f437f439cfca238fba37e97a7041782f615
+commit 9641753e0fd146204d57b2a4165f552a81afade4
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Jan 14 10:05:54 2023 +0000
+Date:   Mon Mar 6 12:14:48 2023 +0000
 
-    upstream: Shell syntax fix. From ren mingshuai vi github PR#369.
+    upstream: Refactor creation of KEX proposal.
     
-    OpenBSD-Regress-ID: 6696b2eeefe128099fc3d7ea9f23252cc35156f9
+    This adds kex_proposal_populate_entries (and corresponding free) which
+    populates the KEX proposal array with dynamically allocated strings.
+    This replaces the previous mix of static and dynamic that has been the
+    source of previous leaks and bugs.  Remove unused compat functions.
+    With & ok djm@.
+    
+    OpenBSD-Commit-ID: f2f99da4aae2233cb18bf9c749320c5e040a9c7b
 
-commit 4d87a00f704e0365e11c3c38b170c1275ec461fc
+commit aa59d6a489fb20973fa461d0fdb1110db412947b
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Jan 14 09:57:08 2023 +0000
+Date:   Sun Mar 5 09:24:35 2023 +0000
 
-    upstream: Instead of skipping the all-tokens test if we don't have
+    upstream: Fix mem and FILE leaks in moduli screening.
     
-    OpenSSL (since we use it to compute the hash), put the hash at the end and
-    just omit it if we don't have it.  Prompted by bz#3521.
+    If multiple -Ocheckpoint= options are passed, the earlier ones would
+    be overwritten and leaked.  If we use an input file that wasn't stdin,
+    close that.  From Coverity CIDs 291884 and 291894.
     
-    OpenBSD-Regress-ID: c79ecba64250ed3b6417294b6c965e6b12ca5eea
+    OpenBSD-Commit-ID: a4d9d15f572926f841788912e2b282485ad09e8b
 
-commit b05406d6f93b8c8ec11ec8b27e7c76cc7a5a55fb
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Jan 13 07:13:40 2023 +0000
+commit 23b8cb41767af99a1aac24589d1882d9c8c2c205
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sun Mar 5 08:18:58 2023 +0000
 
-    upstream: fix double phrase in previous;
+    upstream: Plug mem leak in moduli checkpoint option parsing.
     
-    OpenBSD-Commit-ID: 671e6c8dc5e9230518b2bbfa143daaa88adc66c2
+    From Coverity CID 291894.
+    
+    OpenBSD-Commit-ID: 9b1aba2d049741ae21c8dc4560a7e29ab17310f4
 
-commit 40564812b659c530eb1f4b62d09e85612aef3107
+commit fc7f8f2188d4a4fc8ba77eddbe863c7665666db5
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 13 03:16:29 2023 +0000
+Date:   Sun Mar 5 05:34:09 2023 +0000
 
-    upstream: Document "UserKnownHostsFile none". ok djm@
+    upstream: Remove unused compat.h includes.
     
-    OpenBSD-Commit-ID: f695742d39e34ecdcc3c861c3739a84648a4bce5
-
-commit d03e245e034019a37388f6f5f893ce848ab6d2e2
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jan 13 23:02:34 2023 +1100
-
-    Retry package installation 3 times.
+    We've previously removed a lot of the really old compatibility code,
+    and with it went the need to include compat.h in most of the files that
+    have it.
     
-    When setting up the CI environment, retry package installation 3 times
-    before going up.  Should help prevent spurious failures during
-    infrastructure issues.
+    OpenBSD-Commit-ID: 5af8baa194be00a3092d17598e88a5b29f7ea2b4
 
-commit 625f6bc39840167dafb3bf5b6a3e18503ac986e8
+commit 6c165c36246d8004c20e1df5cec4961a5ac422d6
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 13 04:47:34 2023 +0000
+Date:   Sat Mar 4 03:22:59 2023 +0000
 
-    upstream: Move scp path setting to a helper function. The previous
+    upstream: Use time_t for x11 timeout.
     
-    commit to add scp to the test sshd's path causes the t-envpass test to fail
-    when the test scp is given using a fully qualified path.  Put this in a
-    helper function and only call it from the scp tests.
+    Use time_t instead of u_int for remaining x11 timeout checks for 64bit
+    time_t safety.  From Coverity CIDs 405197 and 405028, ok djm@
     
-    OpenBSD-Regress-ID: 7533dc1c4265c1de716abb062957994195b36df4
+    OpenBSD-Commit-ID: 356685bfa1fc3d81bd95722d3fc47101cc1a4972
 
-commit 6e6f88647042b3cde54a628545c2f5fb656a9327
+commit 4a3918f51bd2d968387e7aa87e33b32c78077fb4
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 13 04:23:00 2023 +0000
+Date:   Fri Mar 3 10:23:42 2023 +0000
 
-    upstream: Add scp's path to test sshd's PATH.
-    
-    If the scp we're testing is fully qualified (eg it's not in the system
-    PATH) then add its path to the under-test sshd's PATH so we can find
-    it. Prompted by bz#3518.
+    upstream: Ensure ms_remain is always initialized
     
-    OpenBSD-Regress-ID: 7df4f5a0be3aa135495b7e5a6719d3cbc26cc4c0
-
-commit 8a5e99a70fcf9b022a8aa175ebf6a71f58511da3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jan 13 15:49:48 2023 +1100
-
-    Remove skipping test when scp not in path.
+    similar to what we do in ssh_packet_write_wait.  bz#2687, from jjelen
+    at redhat.com.
     
-    An upcoming change renders this obsolete by adding scp's path to the
-    test sshd's PATH, and removing this first will make the subsequent sync
-    easier.
+    OpenBSD-Commit-ID: a50e0541cf823f8d1c72f71ccde925d3dbe6dfac
 
-commit 41f36dd896c8fb8337d403fcf476762986976e9d
+commit e44846a4487d2885ac7f2610be09b1e2bf52249b
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 13 02:58:20 2023 +0000
+Date:   Fri Mar 3 09:48:51 2023 +0000
 
-    upstream: Add a "Host" line to the output of ssh -G showing the
+    upstream: Check for non-NULL before string
     
-    original host arg. Inspired by patch from vincent at bernat.ch via bz#3343,
-    ok djm@
+    comparison. From jjelen at redhat.com via bz#2687.
     
-    OpenBSD-Commit-ID: 59c0f60a222113a44d0650cd394376e3beecc883
+    OpenBSD-Commit-ID: 0d9b2e0cac88a311b5766b1aef737082583c285f
 
-commit f673b49f3be3eb51074fbb8a405beb6cd0f7d93e
+commit 1842d523fae63b862ce8e60725c9b606cddb86a6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 13 02:44:02 2023 +0000
+Date:   Fri Mar 3 05:00:34 2023 +0000
 
-    upstream: avoid printf("%s", NULL) if using ssh
+    upstream: guard against getsockname(-1, ...) from Coverity CID
     
-    -oUserKnownHostsFile=none and a hostkey in one of the system known hosts file
-    changes; ok dtucker@
+    291832
     
-    OpenBSD-Commit-ID: 7ca87614bfc6da491315536a7f2301434a9fe614
+    OpenBSD-Commit-ID: e58d5227327917d189229b7f0b37d2780f360d5f
 
-commit 93fc7c576563e3d88a1dc019dd213f65607784cc
+commit 78571a5fe9847d40d7f220c92b707574ae9ec4ce
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 11 05:39:38 2023 +0000
+Date:   Fri Mar 3 04:36:20 2023 +0000
 
-    upstream: clamp the minimum buffer lengths and number of inflight
+    upstream: some options are not first-match-wins. Mention that there
     
-    requests too
+    are exceptions at the start of the manpage and label some of them in the
+    option description.
     
-    OpenBSD-Commit-ID: c4965f62fa0ba850940fd66ae3f60cf516bbcd56
+    OpenBSD-Commit-ID: 3b74728446fa6fc8742769eeb8c3674e233e84c4
 
-commit 48bf234322e639d279c5a28435eae50155e9b514
+commit d1c1b3272e8895a96c4f5889bd6e07a8525bd9f1
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 11 05:36:50 2023 +0000
+Date:   Fri Mar 3 04:34:49 2023 +0000
 
-    upstream: ignore bogus upload/download buffer lengths in the limits
+    upstream: actually print "channeltimeout none" in config dump mode;
     
-    extension
+    spotted via Coverity CID 405022
     
-    OpenBSD-Commit-ID: c5b023e0954693ba9a5376e4280c739b5db575f8
+    OpenBSD-Commit-ID: b074b52bf138b75f08264e8da15880b29c7a630f
 
-commit 36b00d31833ca74cb0f7c7d8eda1bde55700f929
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 11 02:13:52 2023 +0000
+commit 8bf61e95610b48192d4e1720cc15d9004617301d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Mar 3 14:50:03 2023 +1100
 
-    upstream: remove whitespace at EOL from code extracted from SUPERCOP
-    
-    OpenBSD-Commit-ID: 1ec524ff2fbb9387d731601437c82008f35a60f4
+    Add Coverity badges.
 
-commit d888de06c5e4d7dbf2f2b85f2b5bf028c570cf78
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 11 00:51:27 2023 +0000
+commit 93291bd723959adf462b1df958106cf07a7734dd
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 3 03:12:24 2023 +0000
 
-    upstream: rewrite this test to use a multiplexed ssh session so we can
-    
-    control its lifecycle without risk of race conditions; fixes some of the
-    Github integration tests for openssh-portable
+    upstream: Check return values of dup2. Spotted by Coverity, ok djm@
     
-    OpenBSD-Regress-ID: 5451cad59ba0d43ae9eeda48ec80f54405fee969
+    OpenBSD-Commit-ID: 19fb1b53072826d00c67df677731d2f6c1dd602b
 
-commit 4bcc737a35fdd9cc4af7423d6c23dfd0c7ef4786
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jan 11 11:45:17 2023 +1100
+commit e37261dff33af23f37202cfce0848d36f5c1055c
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 3 02:37:58 2023 +0000
 
-    remove buffer len workaround for NetBSD 4.x
+    upstream: Use time_t for x11_refuse_time timeout. We need
     
-    Switching to from pipes to a socketpair for communicating with the
-    ssh process avoids the (kernel bug?) problem.
-
-commit f5154d2aac3e6a32a1b13dec23a701a087850cdc
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jan 11 11:44:19 2023 +1100
-
-    add back use of pipes in scp.c under USE_PIPES
+    SSH_TIME_T_MAX for this, so move from misc.c to misc.h so it's available.
+    Fixes a Coverity warning for 64bit time_t safety, ok djm@
     
-    This matches sftp.c which prefers socketpair but uses pipes on
-    some older platforms.
+    OpenBSD-Commit-ID: c69c4c3152cdaab953706db4ccf4d5fd682f7d8d
 
-commit eec737b59cf13841de46134967a206607000acd4
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Tue Jan 10 23:22:15 2023 +0000
+commit 32755a98c29114b13f4c9d47454bbb265b932ad7
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Mar 3 02:34:29 2023 +0000
 
-    upstream: Switch scp from using pipes to a socketpair for
+    upstream: Check return value from fctnl and warn on failure.
     
-    communication with it's ssh sub-processes.  We no longer need to reserve two
-    descriptors to ensure that we don't end up using fd 0-2 unexpectedly, that is
-    handled by sanitise_stdfd() in main(). Based on an original diff from djm@.
-    OK deraadt@ djm@
+    Spotted by Coverity, ok djm@
     
-    OpenBSD-Commit-ID: b80c372faac462471e955ddeab9480d668a2e48d
+    OpenBSD-Commit-ID: 2097c7db3cf657f1e3a6c5077041bacc63143cab
 
-commit d213d126a4a343abd3a1eb13687d39c1891fe5c8
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Jan 6 08:44:11 2023 +0000
+commit 5fc60e8246c36b8255f72a937ebe9787b39648c6
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Mar 2 11:10:27 2023 +0000
 
-    upstream: tweak previous; ok djm
+    upstream: Remove SUDO in proxy command wrapper. Anything that needs
     
-    OpenBSD-Commit-ID: 229c493452766d70a78b0f02f6ff9894f9028858
-
-commit 4a5590a5ee47b7dfd49773e9fdba48ad3089fe64
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Jan 9 16:33:56 2023 +1100
-
-    try to improve logging for dynamic-forward test
+    sudo is already run by it, and it breaks if root isn't in sudoers.
     
-    previously the logs from the ssh used to exercise the forwarding
-    channel would clobber the logs from the ssh actually doing the
-    forwarding
+    OpenBSD-Regress-ID: 6cf22fda32a89c16915f31a6ed9bbdbef2a3bac9
 
-commit 715bc25dcfccf9fb2bee820155fe071d01a618db
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jan 7 23:24:50 2023 +1100
+commit 0d514659b23a257247491179cfbb53a6dd64e164
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Mar 2 08:24:41 2023 +0000
 
-    Skip dynamic-forward test on minix3.
+    upstream: Fix breakage on dhgex test.
     
-    This test relies on loopback addresses which minix does not have.
-    Previously the test would not run at all since it also doesn't have
-    netcat, but now we use our own netcat it tries and fails.
+    This was due to the sshd logs being written to the wrong log file.
+    While there, make save_debug_logs less verbose, write the name of the
+    tarball to regress.log and use $SUDO to remove the old symlinks (which
+    shouldn't be needed, but won't hurt).  Initial problem spotted by anton@.
+    
+    OpenBSD-Regress-ID: 9c44fb9cd418e6ff31165e7a6c1f9f11a6d19f5b
 
-commit dd1249bd5c45128a908395c61b26996a70f82205
-Author: Damien Miller <djm@mindrot.org>
-Date:   Sun Jan 8 12:08:59 2023 +1100
+commit 860201201d4ae655702807966901682cff30a171
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Mar 2 08:14:52 2023 +0000
 
-    don't test IPv6 addresses if platform lacks support
+    upstream: Quote grep and log message better.
+    
+    OpenBSD-Regress-ID: 3823d9063127169736aa274b1784cb28e15b64d4
 
-commit d77fc611a62f2dfee0b654c31a50a814b13310dd
+commit 03a03c6002525f5ad9c8fc874a5d5826a35d9858
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 6 12:33:33 2023 +0000
+Date:   Thu Mar 2 06:41:56 2023 +0000
 
-    upstream: When OpenSSL is not available, skip parts of percent test
+    upstream: Always call fclose on checkpoints.
     
-    that require it. Based on github pr#368 from ren mingshuai.
+    In the case of an fprintf failure we would not call fclose which would
+    leak the FILE pointer.  While we're there, try to clean up the temp file
+    on failure.  Spotted by Coverity, ok djm@
     
-    OpenBSD-Regress-ID: 49a375b2cf61ccb95b52e75e2e025cd10988ebb2
+    OpenBSD-Commit-ID: 73c7ccc5d4fcc235f54c6b20767a2815408525ef
 
-commit 1cd2aac312af9172f1b5cb06c2e1cd090abb83cf
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jan 7 23:01:11 2023 +1100
+commit 13fe8f9785e6d90400ce548939a0b0ddc11fcb3c
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Mar 1 21:54:50 2023 +0000
 
-    Use our own netcat for dynamic-forward test.
+    upstream: Remove old log symlinks
     
-    That way we can be surer about its behaviour rather than trying to
-    second-guess the behaviour of various netcat implementations.
-
-commit 26cab41c05d7b0859d2a1ea5b6ed253d91848a80
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jan 7 14:30:43 2023 +1100
-
-    Use autoconf to find openssl binary.
+    before creating new ones. In -portable some platforms don't like
+    overwriting existing symlinks.
     
-    It's possible to install an OpenSSL in a path not in the system's
-    default library search path.  OpenSSH can still use this (eg if you
-    specify an rpath) but the openssl binary there may not work.  If one is
-    available on the system path just use that.
+    OpenBSD-Regress-ID: 7e7ddc0beb73e945e1c4c58d51c8a125b518120f
 
-commit 5532e010a0eeb6aa264396514f9aed7948471538
+commit 131fcbcaffd1e3bcf5ab766ec497b5d768955310
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jan 7 10:34:18 2023 +1100
+Date:   Wed Mar 1 23:23:02 2023 +1100
 
-    Check openssl_bin path is executable before using.
+    Adjust test jobs for new log directory.
 
-commit 5d7b16cff48598d5908db970bfdc9ff9326142c8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jan 6 23:19:07 2023 +1100
+commit a6f4ac8a2baf77e5361cfa017d0dc250d1409bec
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Mar 1 09:29:32 2023 +0000
 
-    Set OPENSSL_BIN from OpenSSL directory.
+    upstream: Rework logging for the regression tests.
+    
+    Previously we would log to ssh.log and sshd.log, but that is insufficient
+    for tests that have more than one concurent ssh/sshd.
+    
+    Instead, we'll log to separate datestamped files in a $OBJ/log/ and
+    leave a symlink at the previous location pointing at the most recent
+    instance with an entry in regress.log showing which files were created
+    at each point.  This should be sufficient to reconstruct what happened
+    even for tests that use multiple instances of each program.  If the test
+    fails, tar up all of the logs for later analysis.
+    
+    This will let us also capture the output from some of the other tools
+    which was previously sent to /dev/null although most of those will be
+    in future commits.
+    
+    OpenBSD-Regress-ID: f802aa9e7fa51d1a01225c05fb0412d015c33e24
 
-commit 344a0e8240eaf08da5d46a5e3a9ecad6e4f64c35
+commit 8ead62ed5e86c7df597d8604f332f49cd1527b85
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 6 08:50:33 2023 +0000
+Date:   Tue Feb 28 21:31:50 2023 +0000
 
-    upstream: Save debug logs from ssh for debugging purposes.
+    upstream: fatal out if allocating banner string fails to avoid
     
-    OpenBSD-Regress-ID: 109e40b06de1c006a3b8e0d8745b790b2c5870a0
+    potential null deref later in sscanf.  Spotted by Coverity, ok deraadt@
+    
+    OpenBSD-Commit-ID: 74e8d228ac00552e96e9e968dfcccf8dd1f46ad5
 
-commit e1ef172646f7f49c80807eea90225ef5e0be55a8
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 08:07:39 2023 +0000
+commit 44ca56ba0b3f531f1d85730cc701097cd49e6868
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Feb 28 08:45:24 2023 +0000
 
-    upstream: regression test for ChannelTimeout
+    upstream: Explicitly ignore return from fchmod
     
-    OpenBSD-Regress-ID: 280bfbefcfa415428ad744e43f69a8dede8ad685
+    similar to other calls to prevent warning.
+    
+    OpenBSD-Commit-ID: fdc5287dcee0860b5a493186414226c655b0eb0a
 
-commit 2393ea8daf25853459eb07a528d7577688847777
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 07:18:18 2023 +0000
+commit 803392933a3a6f09f834aa5f0c2aab06a3b382f4
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Feb 27 22:12:40 2023 +0000
 
-    upstream: fix typo in verbose logging
+    upstream: Plug mem leak on globbed ls error path.
     
-    OpenBSD-Regress-ID: 0497cdb66e003b2f50ed77291a9104fba2e017e9
+     Spotted by Coverity, ok deraadt@
+    
+    OpenBSD-Commit-ID: de28476025db29820a9a2e56e98b964d8a02861c
 
-commit 161a5378a3cc2e7aa3f9674cb7f4686ae6ce9586
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:59:50 2023 +0000
+commit aa33b4d396abf47a2a45f982f28d054fb1dcb5c3
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Feb 27 21:04:22 2023 +1100
 
-    upstream: unit tests for misc.c:ptimeout_* API
+    Cast time_t's in debug output to long long.
     
-    OpenBSD-Regress-ID: 01f8fb12d08e5aaadd4bd4e71f456b6588be9a94
+    Should fix Coverity warning about truncation of 64bit time_t.
 
-commit 018d671d78145f03d6f07ae9d64d51321da70325
-Author: tb@openbsd.org <tb@openbsd.org>
-Date:   Wed Jan 4 22:48:57 2023 +0000
+commit b0fd60a9de62a03189ad57d0c07f0ac51dc00e95
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Feb 27 17:28:59 2023 +1100
 
-    upstream: Copy bytes from the_banana[] rather than banana()
-    
-    Fixes test failure due to segfault seen on arm64 with xonly snap.
-    
-    ok djm
+    Do shadow expiry calcs using "long long".
     
-    OpenBSD-Regress-ID: 86e2aa4bbd1dff1bc4ebb2969c0d6474485be046
+    Coverity flags these as potentially not 64bit time_t safe so use
+    long long for the calculations and debug output.  ok djm@
 
-commit ab6bb69e251faa8b24f81b25c72ec0120f20cad4
+commit 01dbeb3084d714bbd001ff9d03b9de542e8cdf58
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jan 6 19:13:36 2023 +1100
+Date:   Mon Feb 27 17:07:52 2023 +1100
 
-    unbreak scp on NetBSD 4.x
-    
-    e555d5cad5 effectively increased the default copy buffer size for SFTP
-    transfers. This caused NetBSD 4.x to hang during the "copy local file to
-    remote file in place" scp.sh regression test.
+    avoid clash between for getopt's struct option
     
-    This puts back the original 32KB copy buffer size until we can properly
-    figure out why.
+    Since we don't use getopt_long() nothing outside the getopt()
+    implementation itself uses this structure, so move it into the
+    source to remove it from visibility and clashes with libc's
     
-    lots of debugging assistance from dtucker@
+    ok dtucker@
 
-commit 2d1ff2b9431393ad99ef496d5e3b9dd0d4f5ac8c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:47:18 2023 +0000
+commit eb88d07c43afe407094e7d609248d85a15e148ef
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Feb 25 14:45:41 2023 +1100
 
-    upstream: Implement channel inactivity timeouts
-    
-    This adds a sshd_config ChannelTimeouts directive that allows channels that
-    have not seen traffic in a configurable interval to be automatically closed.
-    Different timeouts may be applied to session, X11, agent and TCP forwarding
-    channels.
-    
-    Note: this only affects channels over an opened SSH connection and not
-    the connection itself. Most clients close the connection when their channels
-    go away, with a notable exception being ssh(1) in multiplexing mode.
-    
-    ok markus dtucker
+    Revert explicit chmods on private keys.
     
-    OpenBSD-Commit-ID: ae8bba3ed9d9f95ff2e2dc8dcadfa36b48e6c0b8
+    This should no longer be needed on Cygwin test runners due to previous
+    commit.
 
-commit 0e34348d0bc0b1522f75d6212a53d6d1d1367980
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:42:34 2023 +0000
+commit 52b75db61030a6c8baf66b73644380cf3f58e26a
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Feb 25 14:43:28 2023 +1100
 
-    upstream: Add channel_set_xtype()
-    
-    This sets an "extended" channel type after channel creation (e.g.
-    "session:subsystem:sftp") that will be used for setting channel inactivity
-    timeouts.
-    
-    ok markus dtucker
+    Remove extended ACLs from working dirs.
     
-    OpenBSD-Commit-ID: 42564aa92345045b4a74300528f960416a15d4ca
+    This should allow umask to work as expected and prevent tests from
+    failing due to excessive permissions on private keys.
 
-commit ceedf09b2977f3a756c759a6e7eb8f8e9db86a18
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:41:49 2023 +0000
+commit 0c5d4c843df5605b043a758d69f9a611ef63c479
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Feb 24 13:44:13 2023 +1100
 
-    upstream: tweak channel ctype names
-    
-    These are now used by sshd_config:ChannelTimeouts to specify timeouts by
-    channel type, so force them all to use a similar format without whitespace.
-    
-    ok dtucker markus
+    Explicitly set permissions on user and host keys.
     
-    OpenBSD-Commit-ID: 66834765bb4ae14f96d2bb981ac98a7dae361b65
+    On cygwin, the umask might not be sufficient.  Should fix tests on
+    Github runners.
 
-commit c60438158ad4b2f83d8504257aba1be7d0b0bb4b
+commit 6c9fc9d7a9f7abf82c3294d74e6d4a25735862ce
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:39:59 2023 +0000
+Date:   Wed Feb 22 03:56:43 2023 +0000
 
-    upstream: Add channel_force_close()
-    
-    This will forcibly close an open channel by simulating read/write errors,
-    draining the IO buffers and calling the detach function.
-    
-    Previously the detach function was only ever called during channel garbage
-    collection, but there was no way to signal the user of a channel (e.g.
-    session.c) that its channel was being closed deliberately (vs. by the
-    usual state-machine logic). So this adds an extra "force" argument to the
-    channel cleanup callback to indicate this condition.
+    upstream: fix progressmeter corruption on wide displays; bz3534
     
-    ok markus dtucker
+    feedback/ok dtucker@
     
-    OpenBSD-Commit-ID: 23052707a42bdc62fda2508636e624afd466324b
+    OpenBSD-Commit-ID: f4affee067cec7c182f3e0b307d758e0472762a3
 
-commit d478cdc7ad6edd4b1bcd1e86fb2f23194ff33d5a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:38:23 2023 +0000
+commit fe0bd3cde9665d364e5eedd2c2c2e60d4cdc3786
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Feb 21 06:48:18 2023 +0000
 
-    upstream: replace manual poll/ppoll timeout math with ptimeout API
+    upstream: fseek to end of known_hosts before writing to it.
     
-    feedback markus / ok markus dtucker
+    POSIX and ANSI C require that applications call fseek or similar between
+    read and writing to a RW file.  OpenBSD doesn't enforce this, but some
+    (System V derived) platforms need this to prevent it from writing a
+    spurious extra byte (in this case, a newline).  ok djm@ deraadt@
     
-    OpenBSD-Commit-ID: c5ec4f2d52684cdb788cd9cbc1bcf89464014be2
+    OpenBSD-Commit-ID: 33e680dcd8110582a93a40a8491024e961f45137
 
-commit 4adf3817a24efe99b06e62630577d683c7cd8065
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 6 02:37:04 2023 +0000
+commit 357fb8ae14c07cd025eeed66e73de91bab569849
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Feb 21 17:51:09 2023 +1100
 
-    upstream: add ptimeout API for keeping track of poll/ppoll
-    
-    timeouts; ok dtucker markus
+    Also run unit tests on AIX VMs.
     
-    OpenBSD-Commit-ID: 3335268ca135b3ec15a947547d7cfbb8ff929ead
+    In the past these tests took too long, but these days it only adds
+    about 5 min to the run.
 
-commit 8c7c69d32375d2f3ce9da0109c9bffc560842316
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 5 05:49:13 2023 +0000
+commit 17781aaa5188ee1477f7779b280d105512e3dbed
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Feb 21 17:38:55 2023 +1100
 
-    upstream: suppress "Connection closed" message when in quiet mode
-    
-    OpenBSD-Commit-ID: 8a3ab7176764da55f60bfacfeae9b82d84e3908f
+    Wrap stdint.h inside ifdef.
 
-commit 845ceecea2ac311b0c267f9ecbd34862e1876fc6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 2 07:03:57 2023 +0000
+commit ef798bad38505f7bf1b5fa5c0843dfc5a2b192b9
+Author: Mayank Sharma <mayank.fit2010@gmail.com>
+Date:   Mon Feb 20 17:37:15 2023 +0530
 
-    upstream: regression test for PermitRemoteOpen
+    Add includes to ptimeout test.
     
-    OpenBSD-Regress-ID: 8271aafbf5c21950cd5bf966f08e585cebfe630c
+    Fixes test failures on AIX due to type mismatches.
 
-commit b3daa8dc582348d6ab8150bc1e571b7aa08c5388
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 2 07:03:30 2023 +0000
+commit ab69dda05d5268454209f529fa80f477e60d846a
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Feb 20 18:24:39 2023 +1100
 
-    upstream: fix bug in PermitRemoteOpen which caused it to ignore its
+    Always use the openssl binary configure tells us.
     
-    first argument unless it was one of the special keywords "any" or "none".
+    This fixes tests on platforms that do not have the openssl tool
+    installed at all.
+
+commit 2a7e3449908571af601a4c2d12ab140096442e47
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Feb 17 04:22:50 2023 +0000
+
+    upstream: Remove now-unused compat bit SSH_BUG_RSASIGMD5. The code
     
-    Reported by Georges Chaudy in bz3515; ok dtucker@
+    to set this was removed in OpenSSH 7.7 when support for SSH implementations
+    dating back to before RFC standardization were removed.  "burn it all" djm@
     
-    OpenBSD-Commit-ID: c5678a39f1ff79993d5ae3cfac5746a4ae148ea5
+    OpenBSD-Commit-ID: 6330935fbe23dd00be79891505e06d1ffdac7cda
 
-commit 0872663a7be0301bcc3d49acdbc9b740a3d972d4
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Mon Dec 26 19:16:03 2022 +0000
+commit 0833ccf2c8b7ae08b296c06f17bd53e3ab94b0b0
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Feb 17 03:06:18 2023 +0000
 
-    upstream: spelling fixes; from paul tagliamonte amendments to his
+    upstream: Remove now-unused compat bit SSH_BUG_BIGENDIANAES. This
     
-    diff are noted on tech
+    was previously set for OpenSSH 2.3 (released in 2000) but this check was
+    removed in OpenSSH 7.7 (2018).  ok djm@ deraadt@
     
-    OpenBSD-Commit-ID: d776dd03d0b882ca9c83b84f6b384f6f9bd7de4a
+    OpenBSD-Commit-ID: 326426ea328707fc9e83305291ab135c87f678af
 
-commit 797da2812a71785b34890bb6eb44767a7d09cd34
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Dec 16 07:13:22 2022 +0000
+commit c81c2bea6e828d52b62b448b4ffdd3c163177975
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Feb 17 10:12:40 2023 +1100
 
-    upstream: Mention that scp uses the SFTP protocol and remove
+    whitespace fixes
+
+commit 500f90b39db5f0014e6b0c49ff1f45c994b69293
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Feb 17 10:02:08 2023 +1100
+
+    whitespace at EOL
+
+commit 68350152406339170721c15e97afdf827a5e4001
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Feb 16 10:10:00 2023 +0000
+
+    upstream: Remove SSH_BUG_PASSWORDPAD compat bit
     
-    reference to legacy flag. Spotted by, feedback and ok jmc@
+    since it's no longer used. ok markus@
     
-    OpenBSD-Commit-ID: 9dfe04966f52e941966b46c7a2972147f95281b3
+    OpenBSD-Commit-ID: b92c21f56fe4b7f9a54790d6a9650725c226820b
 
-commit 93f2ce8c050a7a2a628646c00b40b9b53fef93ef
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Dec 16 06:56:47 2022 +0000
+commit 537cccd804eaf65f32bdce037cc31db4e0ab0f44
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Feb 16 07:55:15 2023 +0000
 
-    upstream: Clear signal mask early in main(); sshd may have been
+    upstream: Remove SSH_BUG_IGNOREMSG compat flag
     
-    started with one or more signals masked (sigprocmask(2) is not cleared
-    on fork/exec) and this could interfere with various things, e.g. the
-    login grace timer.
+    since it's only applicable to SSH1 and thus no longer used.  ok markus@
+    "kill it with fire" djm@
     
-    Execution environments that fail to clear the signal mask before running
-    sshd are clearly broken, but apparently they do exist.
+    OpenBSD-Commit-ID: ea13318b1937795d9db4790d3ce0a6ed01584dab
+
+commit 285cf6cd4b91a0a0ce33193c358c99085af33e43
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Feb 10 06:41:53 2023 +0000
+
+    upstream: space between macro and punctuation; sort usage();
     
-    Reported by Sreedhar Balasubramanian; ok dtucker@
+    OpenBSD-Commit-ID: 6141610cfca037700730e41f868d1d9124958f8c
+
+commit d39a96f70f81878c77336ed35f5c648c1804b71a
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Feb 10 06:40:48 2023 +0000
+
+    upstream: space between macro and punctuation;
     
-    OpenBSD-Commit-ID: 77078c0b1c53c780269fc0c416f121d05e3010ae
+    OpenBSD-Commit-ID: abc95e550be9e6d9a7ff64b65c104c7be21ab19e
 
-commit 4acfaabfae41badb9d334a2ee88c5c6ad041c0d5
+commit 16e82bf53fc34e43e3b948d43b68d5b27a7335e6
 Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Dec 16 06:52:48 2022 +0000
+Date:   Fri Feb 10 06:39:27 2023 +0000
 
-    upstream: add -X to usage();
+    upstream: sort SYNOPSIS;
     
-    OpenBSD-Commit-ID: 1bdc3df7de11d766587b0428318336dbffe4a9d0
+    OpenBSD-Commit-ID: dacd9da33277d5669a51213d880632599c890c1e
 
-commit e555d5cad5afae7d5ef2bbc02ca591178fe16fed
+commit d9685121ff6d57b8797411f3cb123884a4b96e30
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Feb 11 12:32:19 2023 +1100
+
+    Improve seccomp compat on older systems.
+    
+    Check if flags to mmap and madvise are defined before using them.
+    Should fix problems building on older Linux systems that don't have
+    these.  bz#3537, with & ok djm@.
+
+commit 6180b0fa4f7996687678702806257e661fd5931e
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Dec 16 03:40:03 2022 +0000
+Date:   Fri Feb 10 05:06:03 2023 +0000
 
-    upstream: add a -X option to both scp(1) and sftp(1) to allow
+    upstream: test -Ohashalg=... and that the default output contains both
     
-    control over some SFTP protocol knobs: the copy buffer length and
-    the number of inflight requests, both of which are used during
-    upload/download.
+    specified hash algorithms; prompted by dtucker@
     
-    Previously these could be controlled in sftp(1) using the -b/-R options.
-    This makes them available in both SFTP protocol clients using the same
-    option character sequence.
+    OpenBSD-Regress-ID: 26f309208c8d8b8fa9c5f419767b85f1e9b22f51
+
+commit d651f5c9fe37e61491eee46c49ba9fa03dbc0e6a
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Feb 10 04:56:30 2023 +0000
+
+    upstream: let ssh-keygen and ssh-keyscan accept
     
-    ok dtucker@
+    -Ohashalg=sha1|sha256 when outputting SSHFP fingerprints to allow algorithm
+    selection. bz3493 ok dtucker@
     
-    OpenBSD-Commit-ID: 27502bffc589776f5da1f31df8cb51abe9a15f1c
+    OpenBSD-Commit-ID: e6e07fe21318a873bd877f333e189eb963a11b3d
 
-commit 5a7a7acab2f466dc1d7467b5d05d35268c3137aa
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Thu Dec 15 18:20:39 2022 +0000
+commit 18938d11a90b74d63c20b2d3c965d5bd64786ab1
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Feb 10 04:47:19 2023 +0000
 
-    upstream: The idiomatic way of coping with signed char vs unsigned
+    upstream: add a `sshd -G` option that parses and prints the
     
-    char (which did not come from stdio read functions) in the presence of
-    ctype macros, is to always cast to (unsigned char).  casting to (int)
-    for a "macro" which is documented to take int, is weird.  And sadly wrong,
-    because of the sing extension risk.. same diff from florian
+    effective configuration without attempting to load private keys and perform
+    other checks. This allows usage of the option before keys have been
+    generated.
     
-    OpenBSD-Commit-ID: 65b9a49a68e22ff3a0ebd593f363e9f22dd73fea
+    bz3460 feedback/ok dtucker@
+    
+    OpenBSD-Commit-ID: 774504f629023fc25a559ab1d95401adb3a7fb29
 
-commit b0b58222c7cc62efd8212c4fb65a545f58ebb22d
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Dec 19 18:49:51 2022 +1100
+commit df7d3dbf7194db8e97730ee0425d4d9d7bdb8b10
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Feb 10 04:40:28 2023 +0000
 
-    Simply handling of SSH_CONNECTION PAM env var.
+    upstream: make `ssh -Q CASignatureAlgorithms` work as the manpage says
     
-    Prompted by bz#3508: there's no need to cache the value of
-    sshpam_conninfo so remove the global.  While there, add check of
-    return value from pam_putenv.  ok djm@
+    it should bz3532
+    
+    OpenBSD-Commit-ID: 0ddb17b3fcbd99bfb5baea4ac5e449620cbd3adc
 
-commit ed8444572ae684fdb892f97bae342c6cb6456f04
+commit d3b8d4198b6595f23b5859d43dc8fc701f97429b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Dec 19 18:42:34 2022 +1100
+Date:   Fri Feb 10 14:26:44 2023 +1100
 
-    Add tests for LibreSSL 3.7.0 and OpenSSL 1.1.1s.
+    Add CentOS 7 test targets.
 
-commit abb9a8aaddfcacbd12641f6e4f203da0fa85a287
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Dec 18 21:36:25 2022 +1100
+commit 22efb01e355bba4755b730ed417f91c081445bfc
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Feb 9 09:55:33 2023 +0000
 
-    Use sudo when resetting perms on directories.
+    upstream: Test adding terminating newline to known_hosts.
+    
+    OpenBSD-Regress-ID: 5fc3010ac450195b3fbdeb68e875564968800365
 
-commit 2f5664c5908d84697cbe91302d5d5c4d83cb2121
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Dec 18 21:19:33 2022 +1100
+commit caec6da1a583ed8c32c6ad3b81bbcaab46ac8b61
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Feb 8 08:06:03 2023 +0000
 
-    Set group perms on regress dir.
+    upstream: ssh-agent doesn't actually take -v,
     
-    This ensures that the tests don't fail due to StrictMode checks.
+    so the recently-added ones will result in the test not cleaning up
+    after itself.  Patch from cjwatson at debian.org vi bz#3536.
+    
+    OpenBSD-Regress-ID: 1fc8283568f5bf2f918517c2c1e778072cf61b1a
 
-commit 137196300fc1540affadde880210f02ba6cb4abf
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Dec 18 21:13:42 2022 +1100
+commit 3c379c9a849a635cc7f05cbe49fe473ccf469ef9
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Feb 9 09:54:11 2023 +0000
 
-    Fetch regress logs from obj dir.
+    upstream: Ensure that there is a terminating newline when adding a new
+    
+    entry to known_hosts.  bz#3529, with git+openssh at limpsquid.nl, ok deraadt@
+    markus@
+    
+    OpenBSD-Commit-ID: fa8d90698da1886570512b96f051e266eac105e0
 
-commit 5f93c4836527d9fda05de8944a1c7b4a205080c7
+commit 95b6bbd2553547260b324b39d602061c88b774bc
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Dec 13 20:59:54 2022 +1100
+Date:   Tue Feb 7 08:43:47 2023 +1100
 
-    obsdsnap test VMs runs-on libvirt too.
+    Replace 9.1 with 9.2 on CI status page.
 
-commit 8386886fb1ab7fda73069fb0db1dbe0e5a52f758
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Dec 13 20:55:37 2022 +1100
+commit 195313dfe10a23c82e9d56d5fdd2f59beee1bdcf
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Feb 3 16:33:09 2023 +1100
 
-    Run upstream obsdsnap tests on ephemeral runners.
+    harden Linux seccomp sandbox
+    
+    Linux mmap(2) and madvise(2) syscalls support quite a number of funky
+    flags that we don't expect that sshd/libc will ever need. We can
+    exclude this kernel attack surface by filtering the mmap(2) flags
+    and the madvise(2) advice arguments.
+    
+    Similarly, the sandboxed process in sshd is a single-threaded program
+    that does not use shared memory for synchronisation or communication.
+    Therefore, there should be no reason for the advanced priority
+    inheritance futex(2) operations to be necessary. These can also be
+    excluded.
+    
+    Motivated by Jann Horn pointing out that there have been kernel bugs
+    in nearby Linux kernel code, e.g. CVE-2020-29368, CVE-2020-29374 and
+    CVE-2022-42703.
+    
+    Feedback Jann Horn, ok dtucker@
 
-commit b6e01459b55ece85d7f296b2bc719d1841e1009e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Dec 13 20:48:56 2022 +1100
+commit 6dfb65de949cdd0a5d198edee9a118f265924f33
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Feb 2 23:21:54 2023 +1100
 
-    Move obsdsnap test VMs to ephemeral runners.
+    crank versions in RPM specs
 
-commit ea6fdf9a1aa71a411f7db218a986392c4fb55693
+commit d07cfb11a0ca574eb68a3931d8c46fbe862a2021
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Dec 9 18:00:21 2022 +1100
+Date:   Thu Feb 2 23:21:45 2023 +1100
 
-    use calloc for allocating arc4random structs
-    
-    ok dtucker
+    update version in README
 
-commit 4403b62f5548e91389cb3339d26a9d0c4bb07b34
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Dec 9 00:22:29 2022 +0000
+commit 9fe207565b4ab0fe5d1ac5bb85e39188d96fb214
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Feb 2 23:17:49 2023 +1100
 
-    upstream: Warn if no host keys for hostbased auth can be loaded.
+    adapt compat_kex_proposal() test to portable
+
+commit 903c556b938fff2d7bff8da2cc460254430963c5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Feb 2 12:12:52 2023 +0000
+
+    upstream: test compat_kex_proposal(); by dtucker@
     
-    OpenBSD-Commit-ID: 2a0a13132000cf8d3593133c1b49768aa3c95977
+    OpenBSD-Regress-ID: 0e404ee264db546f9fdbf53390689ab5f8d38bf2
 
-commit a6183e25e3f1842e21999fe88bc40bb99b121dc3
+commit 405fba71962dec8409c0c962408e09049e5624b5
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Dec 9 00:17:40 2022 +0000
+Date:   Thu Jan 19 07:53:45 2023 +0000
 
-    upstream: Add server debugging for hostbased auth.
+    upstream: Check if we can copy sshd or need to use sudo to do so
     
-    auth_debug_add queues messages about the auth process which is sent to
-    the client after successful authentication.  This also sends those to
-    the server debug log to aid in debugging.  From bz#3507, ok djm@
+    during reexec test. Skip test if neither can work.  Patch from anton@, tweaks
+    from me.
     
-    OpenBSD-Commit-ID: 46ff67518cccf9caf47e06393e2a121ee5aa258a
+    OpenBSD-Regress-ID: 731b96ae74d02d5744e1f1a8e51d09877ffd9b6d
 
-commit b85c3581c16aaf6e83b9a797c80705a56b1f312e
-Author: cheloha@openbsd.org <cheloha@openbsd.org>
-Date:   Sun Dec 4 23:50:49 2022 +0000
+commit b2a2a8f69fd7737ea17dc044353c514f2f962f35
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Feb 2 12:10:22 2023 +0000
 
-    upstream: remove '?' from getopt(3) loops
-    
-    userspace: remove vestigial '?' cases from top-level getopt(3) loops
-    
-    getopt(3) returns '?' when it encounters a flag not present in the in
-    the optstring or if a flag is missing its option argument.  We can
-    handle this case with the "default" failure case with no loss of
-    legibility.  Hence, remove all the redundant "case '?':" lines.
-    
-    Prompted by dlg@.  With help from dlg@ and millert@.
-    
-    Link: https://marc.info/?l=openbsd-tech&m=167011979726449&w=2
-    
-    ok naddy@ millert@ dlg@
+    upstream: openssh-9.2
     
-    OpenBSD-Commit-ID: b2f89346538ce4f5b33ab8011a23e0626a67e66e
+    OpenBSD-Commit-ID: f7389f32413c74d6e2055f05cf65e7082de03923
 
-commit 9a067e8d28a2249fd73f004961e30c113ee85e5d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Dec 7 11:45:43 2022 +0000
+commit 12da7823336434a403f25c7cc0c2c6aed0737a35
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Feb 2 12:10:05 2023 +0000
 
-    upstream: Fix comment typo.
+    upstream: fix double-free caused by compat_kex_proposal(); bz3522
     
-    OpenBSD-Regress-ID: 3b04faced6511bb5e74648c6a4ef4bf2c4decf03
+    by dtucker@, ok me
+    
+    OpenBSD-Commit-ID: 2bfc37cd2d41f67dad64c17a64cf2cd3806a5c80
 
-commit ce3c3e78ce45d68a82c7c8dc89895f297a67f225
+commit 79efd95ab5ff99f4cb3a955e2d713b3f54fb807e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Dec 7 18:58:25 2022 +1100
+Date:   Wed Feb 1 17:17:26 2023 +1100
 
-    Add SANDBOX_DEBUG to the kitchensink test build.
+    Skip connection-timeout test on minix3.
+    
+    Minix 3's Unix domain sockets don't seem to work the way we expect, so
+    skip connection-timeout test on that platform.  While there, group
+    together all similarly skipped tests and explicitly comment.
 
-commit bc234605fa3eb10f56bf0d74c8ecb0d91ada9d05
+commit 6b508c4e039619842bcf5a16f8a6b08dd6bec44a
 Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Dec 7 18:38:25 2022 +1100
+Date:   Wed Feb 1 12:12:05 2023 +1100
 
-    disable SANDBOX_SECCOMP_FILTER_DEBUG
+    fix libfido2 detection without pkg-config
     
-    It was mistakenly enabled in 2580916e4872
+    Place libfido2 before additional libraries (that it may depend upon)
+    and not after. bz3530 from James Zhang; ok dtucker@
+
+commit 358e300fed5e6def233a2c06326e51e20ebed621
+Author: deraadt@openbsd.org <deraadt@openbsd.org>
+Date:   Wed Jan 18 20:56:36 2023 +0000
+
+    upstream: delete useless dependency
     
-    Reported by Peter sec-openssh-com.22.fichtner AT 0sg.net
+    OpenBSD-Commit-ID: e1dc11143f83082e3154d6094f9136d0dc2637ad
 
-commit b087c5cfa011b27992e01589314fec830266f99d
-Author: Rose <83477269+AtariDreams@users.noreply.github.com>
-Date:   Tue Nov 29 15:12:54 2022 -0500
+commit a4cb9be1b021b511e281ee55c356f964487d9e82
+Author: deraadt@openbsd.org <deraadt@openbsd.org>
+Date:   Wed Jan 18 20:43:15 2023 +0000
 
-    Update autotools
+    upstream: Create and install sshd random relink kit.
     
-    Regenerate config files using latest autotools
+    ../Makefile.inc and Makfile are concatenated for reuse, which hopefully won't
+    be too fragile, we'll see if we need a different approach. The resulting sshd
+    binary is tested with the new sshd -V option before installation.  As the
+    binary layout is now semi-unknown (meaning relative, fixed, and gadget
+    offsets are not precisely known), change the filesystem permissions to 511 to
+    prevent what I call "logged in BROP". I have ideas for improving this further
+    but this is a first step ok djm
+    
+    OpenBSD-Commit-ID: 1e0a2692b7e20b126dda60bf04999d1d30d959d8
 
-commit d63f5494978a185c7421d492b9c2f6f05bb54138
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Dec 6 12:22:36 2022 +1100
+commit bc7de6f91a9a0ae2f148a9d31a4027d441a51999
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Wed Jan 18 06:55:32 2023 +0000
 
-    Fix typo in comment.  Spotted by tim@
+    upstream: tweak previous; ok djm
+    
+    OpenBSD-Commit-ID: df71ce4180c58202dfdc1d92626cfe900b91b7c3
 
-commit 73dcca12115aa12ed0d123b914d473c384e52651
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Dec 4 11:03:11 2022 +0000
+commit a20b7e999773e6333c8aa9b0a7fa41966e63b037
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jan 31 19:35:44 2023 +1100
 
-    upstream: Remove duplicate includes.
+    Skip connection-timeout test under Valgrind.
     
-     Patch from AtariDreams via github PR#364.
+    Valgrind slows things down so much that the timeout test fails.  Skip
+    this test until we figure out if we can make it work.
+
+commit c3ffb54b4fc5e608206037921db6ccbc2f5ab25f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Jan 25 21:58:40 2023 +1100
+
+    Skip connection-timeout when missing FD passing.
     
-    OpenBSD-Commit-ID: b9186638a05cb8b56ef7c0de521922b6723644ea
+    This tests uses multiplexing which uses file descriptor passing, so
+    skip it if we don't have that.  Fixes test failures on Cygwin.
 
-commit 3cec15543010bc8d6997d896b1717a650afb7e92
+commit 35253af01d8c0ab444c8377402121816e71c71f5
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Dec 2 04:40:27 2022 +0000
+Date:   Wed Jan 18 02:00:10 2023 +0000
 
-    upstream: make struct sshbuf private
+    upstream: when restoring non-blocking mode to stdio fds, restore
     
-    and remove an unused field; ok dtucker
+    exactly the flags that ssh started with and don't just clobber them with
+    zero, as this could also remove the append flag from the set;
     
-    OpenBSD-Commit-ID: c7a3d77c0b8c153d463398606a8d57569186a0c3
+    bz3523; ok dtucker@
+    
+    OpenBSD-Commit-ID: 1336b03e881db7564a4b66014eb24c5230e9a0c0
 
-commit 5796bf8ca9535f9fa7d01829a540d2550e05c860
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Dec 2 11:43:36 2022 +1100
+commit 7d17ea151c0b2519f023bd9cc7f141128833ac47
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Wed Jan 18 01:50:21 2023 +0000
 
-    Restore ssh-agent permissions on exit.
+    upstream: Add a -V (version) option to sshd like the ssh client
     
-    ...enough that subsequent builds can overwrite ssh-agent if necessary.
+    has. OK markus@ deraadt@
+    
+    OpenBSD-Commit-ID: abe990ec3e636fb040132aab8cbbede98f0c413e
 
-commit ccf5a13868cbb4659107458cac1e017c98abcbda
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Dec 1 02:22:13 2022 +0000
+commit 62360feb7f08f2a4c6fc36f3b3449309203c42c9
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Tue Jan 17 18:52:44 2023 +0000
 
-    upstream: Clean up ssh-add and ssh-agent logs.
+    upstream: For "ssh -V" always exit 0, there is no need to check opt
     
-    OpenBSD-Regress-ID: 9eda8e4c3714d7f943ab2e73ed58a233bd29cd2c
+    again. This was missed when the fallthrough in the switch case above it was
+    removed.  OK deraadt@
+    
+    OpenBSD-Commit-ID: 5583e5d8f6d62a8a4215cfa95a69932f344c8120
 
-commit 7a8b40cf6a5eda80173140cc6750a6db8412fa87
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Dec 1 02:19:29 2022 +0000
+commit 12492c0abf1eb415d08a897cc1d8b9e789888230
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jan 17 10:15:10 2023 +0000
 
-    upstream: Log output of ssh-agent and ssh-add
+    upstream: also check that an active session inhibits
     
-    This should  make debugging easier.
+    UnusedConnectionTimeout idea markus@
     
-    OpenBSD-Regress-ID: 5974b02651f428d7e1079b41304c498ca7e306c8
+    OpenBSD-Regress-ID: 55c0fb61f3bf9e092b0a53f9041d3d2012f14003
 
-commit 4a1805d532616233dd6072e5cd273b96dd3062e6
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Nov 29 22:41:14 2022 +0000
+commit cef2593c33ac46a58238ff998818754eabdf64ff
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Tue Jan 17 10:02:34 2023 +0000
 
-    upstream: Add void to client_repledge args to fix compiler warning. ok djm@
+    upstream: regression test for UnusedConnectionTimeout
     
-    OpenBSD-Commit-ID: 7e964a641ce4a0a0a11f047953b29929d7a4b866
+    OpenBSD-Regress-ID: 7f29001374a68e71e5e078f69e4520cf4bcca084
 
-commit 815c4704930aa449edf6e812e99d69e9ffd31f01
+commit aff9493a89c71d6a080419b49ac64eead9730491
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Nov 28 01:38:22 2022 +0000
+Date:   Mon Jan 16 04:11:29 2023 +0000
 
-    upstream: tighten pledge(2) after session establishment
+    upstream: unbreak test: cannot access shell positional parameters
     
-    feedback, ok & testing in snaps deraadt@
+    past $9 without wrapping the position in braces (i.e. need ${10}, etc.)
     
-    OpenBSD-Commit-ID: aecf4d49d28586dfbcc74328d9333398fef9eb58
+    OpenBSD-Regress-ID: 3750ec98d5d409ce6a93406fedde6f220d2ea2ac
 
-commit f7cebbbf407d772ed71403d314343766782fe540
+commit 0293c19807f83141cdf33b443154459f9ee471f6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Nov 28 01:37:36 2022 +0000
+Date:   Tue Jan 17 09:44:48 2023 +0000
 
-    upstream: New EnableEscapeCommandline ssh_config(5) option
+    upstream: Add a sshd_config UnusedConnectionTimeout option to terminate
     
-    This option (default "no") controls whether the ~C escape is available.
-    Turning it off by default means we will soon be able to use a stricter
-    default pledge(2) in the client.
+    client connections that have no open channels for some length of time. This
+    complements the recently-added ChannelTimeout option that terminates inactive
+    channels after a timeout.
     
-    feedback deraadt@ dtucker@; tested in snaps for a while
+    ok markus@
     
-    OpenBSD-Commit-ID: 7e277595d60acb8263118dcb66554472257b387a
+    OpenBSD-Commit-ID: ca983be74c0350364c11f8ba3bd692f6f24f5da9
 
-commit d323f7ecf52e3d4ec1f4939bf31693e02f891dca
-Author: mbuhl@openbsd.org <mbuhl@openbsd.org>
-Date:   Fri Nov 18 19:47:40 2022 +0000
+commit 8ec2e3123802d2beeca06c1644b0b647f6d36dab
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sun Jan 15 23:35:10 2023 +0000
 
-    upstream: In channel_request_remote_forwarding the parameters for
-    
-    permission_set_add are leaked as they are also duplicated in the call. Found
-    by CodeChecker. ok djm
+    upstream: adapt to ed25519 changes in src/usr.bin/ssh
     
-    OpenBSD-Commit-ID: 4aef50fa9be7c0b138188814c8fe3dccc196f61e
+    OpenBSD-Regress-ID: 4b3e7ba7ee486ae8a0b4790f8112eded2bb7dcd5
 
-commit 62cc33e6eed847aafdc29e34aa69e9bd82a0ee16
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 30 11:23:11 2022 +1100
+commit 9fbbfeca1ce4c7ec0001c827bbf4189a3ba0964b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sun Jan 15 23:05:32 2023 +0000
 
-    Use -fzero-call-used-regs=used on clang 15.
+    upstream: update OpenSSH's Ed25519 code to the last version of SUPERCOP
     
-    clang 15 seems to have a problem with -fzero-call-used-reg=all which
-    causes spurious "incorrect signature" failures with ED25519.  On those
-    versions, use -fzero-call-used-regs=used instead.  (We may add exceptions
-    later if specific versions prove to be OK).  Also move the GCC version
-    check to match.
+    (20221122) and change the import approach to the same one we use for
+    Streamlined NTRUPrime: use a shell script to extract the bits we need from
+    SUPERCOP, make some minor adjustments and squish them all into a single file.
     
-    Initial investigation by Daniel Pouzzner (douzzer at mega nu), workaround
-    suggested by Bill Wendling (morbo at google com).  bz#3475, ok djm@
+    ok tb@ tobhe@
+    
+    OpenBSD-Commit-ID: 1bc0fd624cb6af440905b8ba74ac7c03311b8e3b
 
-commit f84b9cffd52c9c5c359a54a1929f9948e803ab1d
+commit 6283f4bd83eee714d0f5fc55802eff836b06fea8
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 28 21:09:28 2022 +1100
+Date:   Sat Jan 14 22:02:44 2023 +1100
 
-    Skip unit tests on slow riscv64 hardware.
+    Allow writev is seccomp sandbox.
+    
+    This seems to be used by recent glibcs at least in some configurations.
+    From bz#3512, ok djm@
 
-commit 9f2747e0bed3faca92679eae69aef10c95dc82f5
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 15:26:22 2022 +1100
+commit 923c3f437f439cfca238fba37e97a7041782f615
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sat Jan 14 10:05:54 2023 +0000
 
-    Rework how selfhosted tests interact with runners.
+    upstream: Shell syntax fix. From ren mingshuai vi github PR#369.
     
-    Previously there was one runner per test target (mostly VMs).  This had
-    a few limitations:
-     - multiple tests that ran on the same target (eg multiple build
-       configs) were serialized on availability or that runner.
-     - it needed manual balancing of VMs over host machines.
+    OpenBSD-Regress-ID: 6696b2eeefe128099fc3d7ea9f23252cc35156f9
+
+commit 4d87a00f704e0365e11c3c38b170c1275ec461fc
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sat Jan 14 09:57:08 2023 +0000
+
+    upstream: Instead of skipping the all-tokens test if we don't have
     
-    To address this, make VMs that use ephemeral disks (ie most of them)
-    all use a pool of runners with the "libvirt" label.  This requires that
-    we distinguish between "host" and "target" for those.  Native runners
-    and VMs with persistent disks (eg the constantly-updated snapshot ones)
-    specify the same host and target.
+    OpenSSL (since we use it to compute the hash), put the hash at the end and
+    just omit it if we don't have it.  Prompted by bz#3521.
     
-    This should improve test throughput.
+    OpenBSD-Regress-ID: c79ecba64250ed3b6417294b6c965e6b12ca5eea
 
-commit d664ddaec87bdc7385be8ef7f1337793e1679d48
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 12:19:37 2022 +1100
+commit b05406d6f93b8c8ec11ec8b27e7c76cc7a5a55fb
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Jan 13 07:13:40 2023 +0000
 
-    Run vmstartup from temp dir.
+    upstream: fix double phrase in previous;
     
-    This will allow us to create ephemeral disk images per-runner.
+    OpenBSD-Commit-ID: 671e6c8dc5e9230518b2bbfa143daaa88adc66c2
 
-commit 0fa16e952b1fc1c4cf65e3dd138b0e87003e2e45
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 12:14:00 2022 +1100
+commit 40564812b659c530eb1f4b62d09e85612aef3107
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jan 13 03:16:29 2023 +0000
 
-    Make "config" in matrix singular and pass in env.
+    upstream: Document "UserKnownHostsFile none". ok djm@
     
-    This will allow the startup scripts to adapt their behaviour based on
-    the type and config.
+    OpenBSD-Commit-ID: f695742d39e34ecdcc3c861c3739a84648a4bce5
 
-commit e8857043af54809187be1e8b06749db61112899f
+commit d03e245e034019a37388f6f5f893ce848ab6d2e2
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 11:42:22 2022 +1100
-
-    Add "libvirt" label to dfly30.
+Date:   Fri Jan 13 23:02:34 2023 +1100
 
-commit 9775473d84902dc37753686cd10ae71fbe67efda
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 09:28:20 2022 +1100
-
-    Rename "os" in matrix to "target".
+    Retry package installation 3 times.
     
-    This is in preparation to distinguish this from the host that the runner
-    runs on in case where they are separate (eg VMs).
+    When setting up the CI environment, retry package installation 3 times
+    before going up.  Should help prevent spurious failures during
+    infrastructure issues.
 
-commit 04fd00ceff39f4544ced6f5342060abe584835d0
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 09:23:04 2022 +1100
+commit 625f6bc39840167dafb3bf5b6a3e18503ac986e8
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jan 13 04:47:34 2023 +0000
 
-    Remove unused self-hosted test targets.
+    upstream: Move scp path setting to a helper function. The previous
+    
+    commit to add scp to the test sshd's path causes the t-envpass test to fail
+    when the test scp is given using a fully qualified path.  Put this in a
+    helper function and only call it from the scp tests.
+    
+    OpenBSD-Regress-ID: 7533dc1c4265c1de716abb062957994195b36df4
 
-commit c9d9fcad2a11c1cd1550a541f44091d65f0b5584
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 27 09:16:15 2022 +1100
+commit 6e6f88647042b3cde54a628545c2f5fb656a9327
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jan 13 04:23:00 2023 +0000
 
-    Remove explicit "default" test config argument.
+    upstream: Add scp's path to test sshd's PATH.
     
-    Not specifying the test config implicitly selects default args.
+    If the scp we're testing is fully qualified (eg it's not in the system
+    PATH) then add its path to the under-test sshd's PATH so we can find
+    it. Prompted by bz#3518.
+    
+    OpenBSD-Regress-ID: 7df4f5a0be3aa135495b7e5a6719d3cbc26cc4c0
 
-commit 15a01cf15f396f87c6d221c5a6af98331c818962
+commit 8a5e99a70fcf9b022a8aa175ebf6a71f58511da3
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 23 13:18:54 2022 +1100
+Date:   Fri Jan 13 15:49:48 2023 +1100
 
-    Add fallback for old platforms w/out MAP_ANON.
+    Remove skipping test when scp not in path.
+    
+    An upcoming change renders this obsolete by adding scp's path to the
+    test sshd's PATH, and removing this first will make the subsequent sync
+    easier.
 
-commit 6b9bbbfe8b26db6e9a30a7e08c223e85421aed98
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 23 13:09:11 2022 +1100
+commit 41f36dd896c8fb8337d403fcf476762986976e9d
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jan 13 02:58:20 2023 +0000
 
-    If we haven't found it yet, recheck for sys/stat.h.
+    upstream: Add a "Host" line to the output of ssh -G showing the
     
-    On some very old platforms, sys/stat.h needs sys/types.h, however
-    autoconf 2.71's AC_CHECK_INCLUDES_DEFAULT checks for them in the
-    opposite order, which in combination with modern autoconf's
-    "present but cannot be compiled" behaviour causes it to not be
-    detected.
+    original host arg. Inspired by patch from vincent at bernat.ch via bz#3343,
+    ok djm@
+    
+    OpenBSD-Commit-ID: 59c0f60a222113a44d0650cd394376e3beecc883
 
-commit 8926956f22639132a9f2433fcd25224e01b900f5
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Nov 11 11:25:37 2022 +1100
+commit f673b49f3be3eb51074fbb8a405beb6cd0f7d93e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jan 13 02:44:02 2023 +0000
 
-    Add dfly62 test target.
+    upstream: avoid printf("%s", NULL) if using ssh
+    
+    -oUserKnownHostsFile=none and a hostkey in one of the system known hosts file
+    changes; ok dtucker@
+    
+    OpenBSD-Commit-ID: 7ca87614bfc6da491315536a7f2301434a9fe614
 
-commit 650de7ecd3567b5a5dbf16dd1eb598bd8c20bca8
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Nov 10 23:03:10 2022 +0000
+commit 93fc7c576563e3d88a1dc019dd213f65607784cc
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jan 11 05:39:38 2023 +0000
 
-    upstream: Handle dynamic remote port forwarding in escape commandline's
+    upstream: clamp the minimum buffer lengths and number of inflight
     
-    -R processing. bz#3499, ok djm@
+    requests too
     
-    OpenBSD-Commit-ID: 194ee4cfe7ed0e2b8ad0727f493c798a50454208
+    OpenBSD-Commit-ID: c4965f62fa0ba850940fd66ae3f60cf516bbcd56
 
-commit 5372db7e7985ba2c00f20fdff8942145ca99e033
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 10 12:44:51 2022 +1100
+commit 48bf234322e639d279c5a28435eae50155e9b514
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jan 11 05:36:50 2023 +0000
 
-    Remove seed passing over reexec.
+    upstream: ignore bogus upload/download buffer lengths in the limits
     
-    This was added for the benefit of platforms using ssh-rand-helper to
-    prevent a delay on each connection as sshd reseeded itself.
+    extension
     
-    ssh-random-helper is long gone, and since the re-exec happens before the
-    chroot the re-execed sshd can reseed itself normally. ok djm@
+    OpenBSD-Commit-ID: c5b023e0954693ba9a5376e4280c739b5db575f8
 
-commit ca98d3f8c64cfc51af81e1b01c36a919d5947ec2
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 9 20:59:20 2022 +1100
+commit 36b00d31833ca74cb0f7c7d8eda1bde55700f929
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jan 11 02:13:52 2023 +0000
 
-    Skip reexec test on OpenSSL 1.1.1 specifically.
+    upstream: remove whitespace at EOL from code extracted from SUPERCOP
     
-    OpenSSL 1.1.1 has a bug in its RNG that breaks reexec fallback, so skip
-    that test.  See bz#3483 for details.
+    OpenBSD-Commit-ID: 1ec524ff2fbb9387d731601437c82008f35a60f4
 
-commit 5ec4ebc2548e5f7f1b55b2a5cef5b67bdca8146f
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Nov 9 09:04:12 2022 +0000
+commit d888de06c5e4d7dbf2f2b85f2b5bf028c570cf78
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jan 11 00:51:27 2023 +0000
 
-    upstream: Fix typo in fatal error message.
+    upstream: rewrite this test to use a multiplexed ssh session so we can
     
-    Patch from vapier at chromium.org.
+    control its lifecycle without risk of race conditions; fixes some of the
+    Github integration tests for openssh-portable
     
-    OpenBSD-Commit-ID: 8a0c164a6a25eef0eedfc30df95bfa27644e35cf
+    OpenBSD-Regress-ID: 5451cad59ba0d43ae9eeda48ec80f54405fee969
 
-commit e6abafe9a6d809422d3432b95b3f9747b0acaa71
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Nov 9 09:01:52 2022 +0000
+commit 4bcc737a35fdd9cc4af7423d6c23dfd0c7ef4786
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Jan 11 11:45:17 2023 +1100
 
-    upstream: Remove errant colon and simplify format
+    remove buffer len workaround for NetBSD 4.x
     
-    string in error messages. Patch from vapier at chromium.org.
+    Switching to from pipes to a socketpair for communicating with the
+    ssh process avoids the (kernel bug?) problem.
+
+commit f5154d2aac3e6a32a1b13dec23a701a087850cdc
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Jan 11 11:44:19 2023 +1100
+
+    add back use of pipes in scp.c under USE_PIPES
     
-    OpenBSD-Commit-ID: fc28466ebc7b74e0072331947a89bdd239c160d3
+    This matches sftp.c which prefers socketpair but uses pipes on
+    some older platforms.
 
-commit db2027a687516f87c3fb141e87154bb3d8a7807c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Nov 9 01:37:44 2022 +0000
+commit eec737b59cf13841de46134967a206607000acd4
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Tue Jan 10 23:22:15 2023 +0000
 
-    upstream: rename client_global_hostkeys_private_confirm() to
+    upstream: Switch scp from using pipes to a socketpair for
     
-    client_global_hostkeys_prove_confirm(), as it handles the
-    "hostkeys-prove00@openssh.com" message; no functional change
+    communication with it's ssh sub-processes.  We no longer need to reserve two
+    descriptors to ensure that we don't end up using fd 0-2 unexpectedly, that is
+    handled by sanitise_stdfd() in main(). Based on an original diff from djm@.
+    OK deraadt@ djm@
     
-    OpenBSD-Commit-ID: 31e09bd3cca6eed26855b88fb8beed18e9bd026d
+    OpenBSD-Commit-ID: b80c372faac462471e955ddeab9480d668a2e48d
 
-commit 1c2be7c2004cf1abcd172fee9fe3eab57cd4c426
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Nov 9 00:15:59 2022 +0000
+commit d213d126a4a343abd3a1eb13687d39c1891fe5c8
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Jan 6 08:44:11 2023 +0000
 
-    upstream: typo in comment
+    upstream: tweak previous; ok djm
     
-    OpenBSD-Commit-ID: 39c58f41e0f32d1ff31731fa6f5bbbc3ad25084a
+    OpenBSD-Commit-ID: 229c493452766d70a78b0f02f6ff9894f9028858
 
-commit cf1a9852d7fc93e4abc4168aed09529a57427cdc
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 9 09:23:47 2022 +1100
+commit 4a5590a5ee47b7dfd49773e9fdba48ad3089fe64
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Jan 9 16:33:56 2023 +1100
 
-    Defer seed_rng until after closefrom call.
+    try to improve logging for dynamic-forward test
     
-    seed_rng will initialize OpenSSL, and some engine providers (eg Intel's
-    QAT) will open descriptors for their own use.  bz#3483, patch from
-    joel.d.schuetze at intel.com, ok djm@
+    previously the logs from the ssh used to exercise the forwarding
+    channel would clobber the logs from the ssh actually doing the
+    forwarding
 
-commit dffa64480163fbf76af7e4fb62c26bb0dd6642aa
+commit 715bc25dcfccf9fb2bee820155fe071d01a618db
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 9 08:27:47 2022 +1100
+Date:   Sat Jan 7 23:24:50 2023 +1100
 
-    Fix comment text.  From emaste at freebsd.org.
+    Skip dynamic-forward test on minix3.
+    
+    This test relies on loopback addresses which minix does not have.
+    Previously the test would not run at all since it also doesn't have
+    netcat, but now we use our own netcat it tries and fails.
 
-commit d9df5689c29823ab830ec4f54c83c6cc3c0077ad
-Author: Pierre Ossman <ossman@cendio.se>
-Date:   Wed Jul 6 13:52:10 2022 +0200
+commit dd1249bd5c45128a908395c61b26996a70f82205
+Author: Damien Miller <djm@mindrot.org>
+Date:   Sun Jan 8 12:08:59 2023 +1100
 
-    Avoid assuming layout of fd_set
+    don't test IPv6 addresses if platform lacks support
+
+commit d77fc611a62f2dfee0b654c31a50a814b13310dd
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jan 6 12:33:33 2023 +0000
+
+    upstream: When OpenSSL is not available, skip parts of percent test
     
-    POSIX doesn't specify the internal layout of the fd_set object, so let's
-    not assume it is just a bit mask. This increases compatibility with
-    systems that have a different layout.
+    that require it. Based on github pr#368 from ren mingshuai.
     
-    The assumption is also worthless as we already refuse to use file
-    descriptors over FD_SETSIZE anyway. Meaning that the default size of
-    fd_set is quite sufficient.
+    OpenBSD-Regress-ID: 49a375b2cf61ccb95b52e75e2e025cd10988ebb2
 
-commit 419aa8a312e8d8f491933ca3d5933e602cb05aae
+commit 1cd2aac312af9172f1b5cb06c2e1cd090abb83cf
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 8 12:42:52 2022 +1100
+Date:   Sat Jan 7 23:01:11 2023 +1100
 
-    Shutdown any VM before trying to check out repo.
+    Use our own netcat for dynamic-forward test.
     
-    In the case where the previous run did not clean up, the checkout will
-    fail as it'll leave a stale mount.
+    That way we can be surer about its behaviour rather than trying to
+    second-guess the behaviour of various netcat implementations.
 
-commit a32c07cbb78f65d8527642b96474a83b413f8108
+commit 26cab41c05d7b0859d2a1ea5b6ed253d91848a80
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 8 11:33:25 2022 +1100
+Date:   Sat Jan 7 14:30:43 2023 +1100
 
-    Run vm startup and shutdown from runner temp dir.
+    Use autoconf to find openssl binary.
     
-    Should work even if the github workspace dir is on a stale sshfs mount.
+    It's possible to install an OpenSSL in a path not in the system's
+    default library search path.  OpenSSH can still use this (eg if you
+    specify an rpath) but the openssl binary there may not work.  If one is
+    available on the system path just use that.
 
-commit 2b40a7dfcdb8e616155b9504145aa52b271455aa
+commit 5532e010a0eeb6aa264396514f9aed7948471538
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 8 11:03:31 2022 +1100
+Date:   Sat Jan 7 10:34:18 2023 +1100
 
-    Add valrind-5 test here too.
+    Check openssl_bin path is executable before using.
 
-commit 2ea03d1f6d0a05ee2b63ed2dc0f2d54f1e4655a1
+commit 5d7b16cff48598d5908db970bfdc9ff9326142c8
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 8 09:21:10 2022 +1100
+Date:   Fri Jan 6 23:19:07 2023 +1100
 
-    Update checkout and upload actions.
-    
-    Update actions/checkout and actions/upload-artifact to main branch for
-    compatibility with node.js v16.
-
-commit 4e316ff0f18a118232bb9ac6512ee62773a9e8ea
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 8 09:17:04 2022 +1100
-
-    Split out rekey test since it runs the longest.
-
-commit 21625a6424258a92a96a3bb73ae6aabc5ed8a6b4
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Nov 7 10:09:28 2022 +0000
-
-    upstream: The IdentityFile option in ssh_config can also be used to
-    
-    specify a public key file, as documented in ssh.1 for the -i option. Document
-    this also for IdentityFile in ssh_config.5, for documentation completeness.
-    From laalsaas at systemli.org via portable github PR#352, ok jmc@ djm@
-    
-    OpenBSD-Commit-ID: 2f943be9f96e60ef81a9a4faa25b009999f9883b
-
-commit 747691604d3325ed2b62bad85b6fd8563ad32f6c
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Nov 7 10:05:38 2022 +0000
-
-    upstream: Remove some set but otherwise unused variables, spotted
-    
-    in -portable by clang 16's -Wunused-but-set-variable.  ok djm@
-    
-    OpenBSD-Commit-ID: 3d943ddf2369b38fbf89f5f19728e7dc1daf3982
-
-commit 1d78d25653805aefc7a8dd9d86cd7359ada3823c
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Nov 7 10:02:59 2022 +0000
-
-    upstream: Check for and disallow MaxStartups values less than or
-    
-    equal to zero during config parsing, rather than faling later at runtime.
-    bz#3489, ok djm@
-    
-    OpenBSD-Commit-ID: d79c2b7a8601eb9be493629a91245d761154308b
-
-commit a00f59a645072e5f5a8d207af15916a7b23e2642
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Nov 7 04:04:40 2022 +0000
-
-    upstream: fix parsing of hex cert expiry time; was checking whether the
-    
-    start time began with "0x", not the expiry time.
-    
-    from Ed Maste
-    
-    OpenBSD-Commit-ID: 6269242c3e1a130b47c92cfca4d661df15f05739
-
-commit f58acaf8c7315483f4ac87d46a1aa2142a713cd8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 15:10:59 2022 +1100
-
-    Fix merge conflict.
-
-commit 162e5741020a8d996c0c12b988b118e71ed728e6
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 15:04:33 2022 +1100
-
-    Branch-specific links for master status badges.
-
-commit e4b7c12ab24579312aa3ed38ce7041a439ec2d56
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 14:46:38 2022 +1100
-
-    Add CIFuzz status badge.
-
-commit b496b9f831acd1e5bcd875e26e797488beef494a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 14:45:16 2022 +1100
-
-    Do not run CIFuzz on selfhosted tree.
-    
-    We already run it on the regular tree, no need to double up.
-
-commit 2138b1c4ddb300129a41a5104627b0d561184c7b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 14:41:58 2022 +1100
-
-    Whitespace change to trigger CIFuzz workflow.
-
-commit 4670b97ef87c7b0f21283c9b07c7191be88dda05
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 14:34:04 2022 +1100
-
-    Run cifuzz workflow on the actions as regular CI.
-
-commit 79391e66ce851ace1baf3c6a35e83a23f08ec2ba
-Author: David Korczynski <david@adalogics.com>
-Date:   Tue Nov 30 11:45:20 2021 +0000
-
-    Add CIFuzz integration
-
-commit c1893364a0be243270014d7d34362a8101d55112
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Nov 7 02:21:22 2022 +0000
-
-    upstream: Import regenerated moduli.
-    
-    OpenBSD-Commit-ID: b0e54ee4d703bd6929bbc624068666a7a42ecb1f
-
-commit 5c3f18fb994ef27e685b205ee2351851b80fdbd1
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Nov 7 01:53:01 2022 +0000
-
-    upstream: Fix typo. From pablomh via -portable github PR#344.
-    
-    OpenBSD-Commit-ID: d056ee2e73691dc3ecdb44a6de68e6b88cd93827
-
-commit e1c6fcc142066417c9832e634463faa3dd5d116c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 12:46:58 2022 +1100
-
-    Link to branch-specific queries for V_9_1 status.
-
-commit 4f4a5fad6d8892c3f8ee9cd81ec7de6458210c9f
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 6 10:55:59 2022 +1100
-
-    Use "prohibit-password" in -portable comments.
-    
-    "without-password" is the deprecated alias for "prohibit-password",
-    so we should reference the latter. From emaste at freebsd.org.
-
-commit 0f7e1eba55259ec037f515000b4c4afbf446230a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Nov 6 10:50:01 2022 +1100
-
-    Fix tracing disable on FreeBSD.
-    
-    Some versions of FreeBSD do not support using id 0 to refer to the
-    current pid for procctl, so pass getpid() explicitly.  From
-    emaste at freebsd.org.
-
-commit 32fddb982fd61b11a2f218a115975a87ab126d43
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Nov 7 10:39:01 2022 +1100
-
-    Fix setres*id checks to work with clang-16.
-    
-    glibc has the prototypes for setresuid and setresgid behind _GNU_SOURCE,
-    and clang 16 will error out on implicit function definitions, so add
-    _GNU_SOURCE and the required headers to the configure checks.  From
-    sam at @gentoo.org via bz#3497.
-
-commit 12af712d116f42164bcfa56db901d06e4fa27199
-Author: Sam James <sam@gentoo.org>
-Date:   Sun Nov 6 04:52:38 2022 +0000
-
-    configure.ac: Fix -Wstrict-prototypes
-    
-    Clang 16 now warns on this and it'll be removed in C23, so let's
-    just be future proof. It also reduces noise when doing general
-    Clang 16 porting work (which is a big job as it is).  github PR#355.
-    
-    Signed-off-by: Sam James <sam@gentoo.org>
-
-commit 40b0a5eb6e3edfa2886b60c09c7803353b0cc7f5
-Author: Sam James <sam@gentoo.org>
-Date:   Sun Nov 6 04:47:35 2022 +0000
-
-    configure.ac: Add <pty.h> include for openpty
-    
-    Another Clang 16ish fix (which makes -Wimplicit-function-declaration
-    an error by default).  github PR#355.
-    
-    See: 2efd71da49b9cfeab7987058cf5919e473ff466b
-    See: be197635329feb839865fdc738e34e24afd1fca8
-
-commit 6b17e128879ec6cc32ca2c28b5d894b4aa72e32d
-Author: Rochdi Nassah <rochdinassah.1998@gmail.com>
-Date:   Fri Oct 28 01:26:31 2022 +0100
-
-    Fix broken zlib link.
-
-commit 99500df246ccb736ddbdd04160dcc82165d81a77
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Nov 4 16:59:26 2022 +1100
-
-    Don't run openbsd-compat tests on Cygwin.
-    
-    Add "compat-tests" to the default TEST_TARGET so we can override as
-    necessary.  Override TEST_TARGET for Cygwin as the tests don't currently
-    compile there.
-
-commit 3cae9f92a31897409666aa1e6f696f779759332b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Nov 3 21:59:20 2022 +0000
-
-    upstream: replace recently-added valid_domain() check for hostnames
-    
-    going to known_hosts with a more relaxed check for bad characters; previous
-    commit broke address literals. Reported by/feedback from florian@
-    
-    OpenBSD-Commit-ID: 10b86dc6a4b206adaa0c11b58b6d5933898d43e0
-
-commit 9655217231c9056200bea7ae2dffcc9c0c3eb265
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 23:07:50 2022 +1100
-
-    Rerun tests on changes to Makefile.in in any dir.
-
-commit 3500f0405a3ab16b59a26f3508c4257a3fc3bce6
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 23:04:08 2022 +1100
-
-    Link libssh into compat tests.
-    
-    The cygwin compat code uses xmalloc, so add libssh.a so pick up that.
-
-commit ec59effcf65b8a4c85d47ff5a271123259dd0ab8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 21:44:23 2022 +1100
-
-    Fix compat regress to work with non-GNU make.
-
-commit 73550a218e7dfbbd599534cbf856309bc924f6fd
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 13:41:16 2022 +1100
-
-    Increase selfhosted job timeout.
-    
-    The default job timeout of 360 (6h) is not enough to complete the
-    regress tests for some of the slow VMs depending on the load on the host.
-    Increase to 600 (10h).
-
-commit db97d8d0b90c6ce52b94b153d6f8f5f7d3b11777
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 10:00:43 2022 +1100
-
-    Only run opensslver tests if built with OpenSSL.
-
-commit ba053709638dff2f6603df0c1f340352261d63ea
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 2 14:16:04 2022 +1100
-
-    Add tests for OpenSSL 3.0.7 and LibreSSL 3.6.1.
-
-commit edd24101c7e17d1a8f6576e1aaf62233b47ad6f5
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 08:17:39 2022 +1100
-
-    Run compat regress tests too.
-
-commit fe88d67e7599b0bc73f6e4524add28d743e7f977
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 08:14:05 2022 +1100
-
-    Compat tests need libcrypto.
-    
-    This was moved to CHANNELLIBS during the libs refactor.  Spotted by
-    rapier at psc.edu.
-
-commit 96b519726b7944eee3c23a54eee3d5c031ba1533
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Nov 3 04:24:39 2022 +1100
-
-    Include time.h when defining timegm.
-    
-    Fixes build on some platforms eg recent AIX.
-
-commit da6038bd5cd55eb212eb2aec1fc8ae79bbf76156
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Nov 1 19:10:30 2022 +1100
-
-    Always use compat getentropy.
-    
-    Have it call native getentropy and fall back as required.  Should fix
-    issues of platforms where libc has getentropy but it is not implemented
-    in the kernel.  Based on github PR#354 from simsergey.
-
-commit 5ebe18cab6be3247b44c807ac145164010465b82
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Nov 2 10:51:48 2022 +1100
-
-    Check for sockaddr_in.sin_len.
-    
-    If found, set SOCK_HAS_LEN which is used in addr.c.  Should fix keyscan
-    tests on platforms with this (eg old NetBSD).
-
-commit a1febadf426536612c2734168d409147c392e7cf
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Oct 30 18:42:07 2022 +0000
-
-    upstream: Use variable for diff options
-    
-    instead of unconditionally specifying "-rN". This will make life easier
-    in -portable where not all diff's understand -N.
-    
-    OpenBSD-Regress-ID: 8b8a407115546be1c6d72d350b1e4f1f960d3cd3
-
-commit f6d3ed9a8a9280cbb68d6a499850cfe810e92bd0
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Oct 31 05:13:02 2022 +1100
-
-    OpenSSL dev branch is 302 not 320.
-    
-    While there, also accept 301 which it shat it was previously.
-
-commit 25c8a2bbcc10c493d27faea57c42a6bf13fa51f2
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 02:47:04 2022 +0000
-
-    upstream: put sshkey_check_rsa_length() back in sshkey.c to unbreak
-    
-    OPENSSL=no builds
-    
-    OpenBSD-Commit-ID: 99eec58abe382ecd14b14043b195ee1babb9cf6e
-
-commit 1192588546c29ceec10775125f396555ea71850f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 02:29:34 2022 +0000
-
-    upstream: allow ssh-keyscan(1) to accept CIDR address ranges, e.g.
-    
-    ssh-keyscan 192.168.0.0/24
-    
-    If a CIDR range is passed, then it will be expanded to all possible
-    addresses in the range including the all-0s and all-1s addresses.
-    
-    bz#976 feedback/ok markus@
-    
-    OpenBSD-Commit-ID: ce6c5211f936ac0053fd4a2ddb415277931e6c4b
-
-commit 64af4209309461c79c39eda2d13f9d77816c6398
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Oct 28 12:54:35 2022 +1100
-
-    fix merge botch
-
-commit 27267642699342412964aa785b98afd69d952c88
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:44:44 2022 +0000
-
-    upstream: refactor sshkey_private_deserialize
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: f5ca6932fdaf840a5e8250becb38315a29b5fc9f
-
-commit 2519a7077a9332f70935e5242ba91ee670ed6b87
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:44:17 2022 +0000
-
-    upstream: refactor sshkey_private_serialize_opt()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 61e0fe989897901294efe7c3b6d670cefaf44cbd
-
-commit 11a768adf98371fe4e43f3b06014024c033385d5
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:43:30 2022 +0000
-
-    upstream: refactor certify
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 35d742992e223eaca3537e6fb3d3002c08eed4f6
-
-commit 3fbc58bb249d967cc43ebdc554f6781bb73d4a58
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:43:08 2022 +0000
-
-    upstream: refactor sshkey_sign() and sshkey_verify()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 368e662c128c99d05cc043b1308d2b6c71a4d3cc
-
-commit a1deb6cdbbe6afaab74ecb08fcb62db5739267be
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:41:52 2022 +0000
-
-    upstream: refactor sshkey_from_blob_internal()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 1f46c0cbb8060ee9666a02749594ad6658c8e283
-
-commit 7d00799c935271ce89300494c5677190779f6453
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:41:17 2022 +0000
-
-    upstream: refactor sshkey_from_private()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: e5dbe7a3545930c50f70ee75c867a1e08b382b53
-
-commit 262647c2e920492ca57f1b9320d74f4a0f6e482b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:39:29 2022 +0000
-
-    upstream: factor out key generation
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 5b4211bff4de8d9adb84bc72857a8c42c44e7ceb
-
-commit 401c74e7dc15eab60540653d2f94d9306a927bab
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:38:58 2022 +0000
-
-    upstream: refactor and simplify sshkey_read()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 0d93b7a56e31cd06a8bb0d2191d084ce254b0971
-
-commit 591fed94e66a016acf87f4b7cd416ce812f2abe8
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:37:24 2022 +0000
-
-    upstream: factor out public key serialization
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: a3570c4b97290c5662890aea7328d87f55939033
-
-commit 1e78844ae2b2dc01ba735d5ae740904c57e13685
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:36:31 2022 +0000
-
-    upstream: factor out sshkey_equal_public()
-    
-    feedback/ok markus@
-    
-    OpenBSD-Commit-ID: 1368ba114cb37732fe6ec3d89c7e6d27ea6fdc94
-
-commit 25de1c01a8b9a2c8ab9b1da22444a03e89c982de
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 28 00:35:40 2022 +0000
-
-    upstream: begin big refactor of sshkey
-    
-    Move keytype data and some of the type-specific code (allocation,
-    cleanup, etc) out into each key type's implementation. Subsequent
-    commits will move more, with the goal of having each key-*.c file
-    owning as much of its keytype's implementation as possible.
-    
-    lots of feedback + ok markus@
-    
-    OpenBSD-Commit-ID: 0f2b4334f73914344e9e5b3d33522d41762a57ec
-
-commit 445363433ba20b8a3e655b113858c836da46a1cb
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Oct 24 22:43:36 2022 +0000
-
-    upstream: Be more paranoid with host/domain names coming from the
-    
-    never write a name with bad characters to a known_hosts file.
-    
-    reported by David Leadbeater, ok deraadt@
-    
-    OpenBSD-Commit-ID: ba9b25fa8b5490b49398471e0c9657b0cbc7a5ad
-
-commit 7190154de2c9fe135f0cc1ad349cb2fa45152b89
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Oct 24 21:52:50 2022 +0000
-
-    upstream: regress test for unmatched glob characters; fails before
-    
-    previous commit but passes now. bz3488; prodded by dtucker@
-    
-    OpenBSD-Regress-ID: 0cc5cc9ea4a6fd170dc61b9212f15badaafb3bbd
-
-commit a4821a592456c3add3cd325db433110cdaaa3e5c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Oct 24 21:51:55 2022 +0000
-
-    upstream: when scp(1) is using the SFTP protocol for transport (the
-    
-    default), better match scp/rcp's handling of globs that don't match the
-    globbed characters but do match literally (e.g. trying to transfer
-    "foo.[1]").
-    
-    Previously scp(1) in SFTP mode would not match these pathnames but
-    legacy scp/rcp mode would.
-    
-    Reported by Michael Yagliyan in bz3488; ok dtucker@
-    
-    OpenBSD-Commit-ID: d8a3773f53015ba811fddba7473769a2fd343e11
-
-commit 18376847b8043ba967eabbe23692ef74c9a3fddc
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Thu Oct 13 09:09:28 2022 +0000
-
-    upstream: use correct type with sizeof ok djm@
-    
-    OpenBSD-Commit-ID: d6c882c2e8a42ff831a5b3cbc2c961ecb2dd6143
-
-commit 4a4883664d6b4e9e4e459a8cdc16bd8d4b735de9
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Fri Oct 7 06:00:58 2022 +0000
-
-    upstream: ssh-agent.1: - use Nm not Xr for self-ref - while here,
-    
-    wrap a long line
-    
-    ssh-agent.c:
-    - add -O to usage()
-    
-    OpenBSD-Commit-ID: 855dac4695cef22e96d69c53436496bc408ca389
-
-commit 9fd2441113fce2a83fc7470968c3b27809cc7f10
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Oct 7 04:06:26 2022 +0000
-
-    upstream: document "-O no-restrict-websafe"; spotted by Ross L
-    
-    Richardson
-    
-    OpenBSD-Commit-ID: fe9eaa50237693a14ebe5b5614bf32a02145fe8b
-
-commit 614252b05d70f798a0929b1cd3d213030ad4d007
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Oct 18 06:29:16 2022 +1100
-
-    OpenSSL dev branch now identifies as 3.2.0.
-
-commit 195e5a65fd793a738ea8451ebfdd1919db5aff3e
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Oct 17 09:41:47 2022 +1100
-
-    revert c64b62338b4 and guard POLL* defines instead
-    
-    c64b62338b4 broke OSX builds, which do have poll.h but lack ppoll(2)
-    Spotted by dtucker
-
-commit bc2e480d99613bd59720edae244d1764636544c4
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Oct 14 14:52:22 2022 +1100
-
-    undef _get{short,long} before redefining
-
-commit 5eb796a369c64f18d55a6ae9b1fa9b35eea237fb
-Author: Harmen Stoppels <harmenstoppels@gmail.com>
-Date:   Thu Oct 13 16:08:46 2022 +0200
-
-    Fix snprintf configure test for clang 15
-    
-    Clang 15 -Wimplicit-int defaults to an error in C99 mode and above.
-    A handful of tests have "main(..." and not "int main(..." which caused
-    the tests to produce incorrect results.
-
-commit c64b62338b46ffa08839f05f21ad69fa6234dc17
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Oct 10 12:32:43 2022 +1100
-
-    skip bsd-poll.h if poll.h found; ok dtucker
-
-commit 5ee2b8ccfcf4b606f450eb0ff2305e311f68b0be
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Oct 6 22:42:37 2022 +0000
-
-    upstream: honour user's umask if it is more restrictive then the ssh
-    
-    default (022); based on patch from Alex Henrie, ok dtucker@ deraadt@
-    
-    OpenBSD-Commit-ID: fe1b9e15fc9a4f49fc338e848ce14d8727abe82d
-
-commit a75cffc2700cebd3e2dd9093f7f7388d2be95cb7
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Oct 7 03:54:56 2022 +1100
-
-    Add LibreSSL 3.6.0 to test suite.
-    
-    While there, bump OpenSSL to latest 1.1.1q release.
-
-commit fcc0f0c0e96a30076683fea9a7c9eedc72931742
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Oct 6 21:18:16 2022 +1100
-
-    Add 9.1 branch to CI status page.
-
-commit ef211eee63821d894a8bf81f22bfba9f6899d0fe
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Oct 4 23:20:23 2022 +1100
-
-    Test commits to all branches of portable.
-    
-    Only test OpenBSD upstream on commits to master since that's what it
-    tracks.
-
-commit fe646de03cafb6593ff4e4954bca9ec4b4b753a8
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Oct 5 03:47:26 2022 +1100
-
-    whitespace at EOL
-
-commit a6e1852d10c63a830196e82168dadd957aaf28ec
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Oct 5 03:40:01 2022 +1100
-
-    mention libfido2 autodetection
-
-commit 7360c2c206f33d309edbaf64036c96fadf74d640
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Oct 5 03:37:36 2022 +1100
-
-    remove mention of --with-security-key-builtin
-    
-    it is enabled by default when libfido2 is installed
-
-commit 0ffb46f2ee2ffcc4daf45ee679e484da8fcf338c
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Oct 4 01:51:42 2022 +1100
-
-    update .depend
-
-commit 657e676ff696c7bb787bffb0e249ea1be3b474e1
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Oct 4 01:45:52 2022 +1100
-
-    update release notes URL
-
-commit f059da2b29840c0f048448809c317ce2ae014da7
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Oct 4 01:45:41 2022 +1100
-
-    crank versions in RPM spec files
-
-commit b51f3f172d87cbdb80ca4eb7b2149e56a7647557
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 26 22:18:40 2022 +0000
-
-    upstream: openssh-9.1
-    
-    OpenBSD-Commit-ID: 5a467b2ee81da01a86adf1ad93b62b1728494e56
+    Set OPENSSL_BIN from OpenSSL directory.
 
-commit 4cf8d0c0f3030f594a238bab21a0695735515487
+commit 344a0e8240eaf08da5d46a5e3a9ecad6e4f64c35
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Sep 21 22:26:50 2022 +0000
-
-    upstream: Fix typo. From AlexanderStohr via github PR#343.
-    
-    OpenBSD-Commit-ID: a134c9b4039e48803fc6a87f955b0f4a03181497
-
-commit 8179fed3264d5919899900ed8881d5f9bb57ca33
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 21:39:16 2022 +0000
-
-    upstream: add RequiredRSASize to the list of keywords accepted by
-    
-    -o; spotted by jmc@
-    
-    OpenBSD-Commit-ID: fe871408cf6f9d3699afeda876f8adbac86a035e
-
-commit 5f954929e9f173dd1e279e07d0e8b14fa845814d
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Sep 19 20:59:34 2022 +1000
-
-    no need for glob.h here
-    
-    it also causes portability problems
-
-commit 03d94a47207d58b3db37eba4f87eb6ae5a63168a
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Sep 19 20:59:04 2022 +1000
-
-    avoid Wuninitialized false positive in gcc-12ish
-
-commit 9d952529113831fb3071ab6e408d2726fd72e771
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 10:46:00 2022 +0000
-
-    upstream: use users-groups-by-id@openssh.com sftp-server extension
-    
-    (when available) to fill in user/group names for directory listings.
-    Implement a client-side cache of see uid/gid=>user/group names. ok markus@
-    
-    OpenBSD-Commit-ID: f239aeeadfa925a37ceee36ee8b256b8ccf4466e
-
-commit 8ff680368b0bccf88ae85d4c99de69387fbad7a6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 10:43:12 2022 +0000
-
-    upstream: sftp client library support for
-    
-    users-groups-by-id@openssh.com; ok markus@
-    
-    OpenBSD-Commit-ID: ddb2f33a2da6349a9a89a8b5bcb9ca7c999394de
-
-commit 488f6e1c582212c2374a4bf8cd1b703d2e70fb8b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 10:41:58 2022 +0000
-
-    upstream: extend sftp-common.c:extend ls_file() to support supplied
-    
-    user/group names; ok markus@
-    
-    OpenBSD-Commit-ID: c70c70498b1fdcf158531117e405b6245863bfb0
-
-commit 74b77f7497dba3a58315c8f308883de448078057
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 10:40:52 2022 +0000
-
-    upstream: sftp-server(8): add a "users-groups-by-id@openssh.com"
-    
-    extension request that allows the client to obtain user/group names that
-    correspond to a set of uids/gids.
-    
-    Will be used to make directory listings more useful and consistent
-    in sftp(1).
-    
-    ok markus@
-    
-    OpenBSD-Commit-ID: 7ebabde0bcb95ef949c4840fe89e697e30df47d3
-
-commit 231a346c0c67cc7ca098360f9a554fa7d4f1eddb
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Sep 19 08:49:50 2022 +0000
-
-    upstream: better debugging for connect_next()
-    
-    OpenBSD-Commit-ID: d16a307a0711499c971807f324484ed3a6036640
-
-commit 1875042c52a3b950ae5963c9ca3774a4cc7f0380
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Sep 17 10:34:29 2022 +0000
-
-    upstream: Add RequiredRSASize for sshd(8); RSA keys that fall
-    
-    beneath this limit will be ignored for user and host-based authentication.
-    
-    Feedback deraadt@ ok markus@
-    
-    OpenBSD-Commit-ID: 187931dfc19d51873df5930a04f2d972adf1f7f1
-
-commit 54b333d12e55e6560b328c737d514ff3511f1afd
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Sep 17 10:33:18 2022 +0000
+Date:   Fri Jan 6 08:50:33 2023 +0000
 
-    upstream: add a RequiredRSASize for checking RSA key length in
-    
-    ssh(1). User authentication keys that fall beneath this limit will be
-    ignored. If a host presents a host key beneath this limit then the connection
-    will be terminated (unfortunately there are no fallbacks in the protocol for
-    host authentication).
-    
-    feedback deraadt, Dmitry Belyavskiy; ok markus@
+    upstream: Save debug logs from ssh for debugging purposes.
     
-    OpenBSD-Commit-ID: 430e339b2a79fa9ecc63f2837b06fdd88a7da13a
+    OpenBSD-Regress-ID: 109e40b06de1c006a3b8e0d8745b790b2c5870a0
 
-commit 07d8771bacfefbcfb37fa8a6dc6103bcc097e0ab
+commit e1ef172646f7f49c80807eea90225ef5e0be55a8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Sep 17 10:30:45 2022 +0000
+Date:   Fri Jan 6 08:07:39 2023 +0000
 
-    upstream: Add a sshkey_check_rsa_length() call for checking the
-    
-    length of an RSA key; ok markus@
+    upstream: regression test for ChannelTimeout
     
-    OpenBSD-Commit-ID: de77cd5b11594297eda82edc594b0d32b8535134
+    OpenBSD-Regress-ID: 280bfbefcfa415428ad744e43f69a8dede8ad685
 
-commit 3991a0cf947cf3ae0f0373bcec5a90e86a7152f5
+commit 2393ea8daf25853459eb07a528d7577688847777
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Sep 17 10:11:29 2022 +0000
+Date:   Fri Jan 6 07:18:18 2023 +0000
 
-    upstream: actually hook up restrict_websafe; the command-line flag
-    
-    was never actually used. Spotted by Matthew Garrett
+    upstream: fix typo in verbose logging
     
-    OpenBSD-Commit-ID: 0b363518ac4c2819dbaa3dfad4028633ab9cdff1
+    OpenBSD-Regress-ID: 0497cdb66e003b2f50ed77291a9104fba2e017e9
 
-commit 30b2a7e4291fb9e357f80a237931ff008d686d3b
+commit 161a5378a3cc2e7aa3f9674cb7f4686ae6ce9586
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 16 06:55:37 2022 +0000
+Date:   Fri Jan 6 02:59:50 2023 +0000
 
-    upstream: correct error value
+    upstream: unit tests for misc.c:ptimeout_* API
     
-    OpenBSD-Commit-ID: 780efcbad76281f11f14b2a5ff04eb6db3dfdad4
+    OpenBSD-Regress-ID: 01f8fb12d08e5aaadd4bd4e71f456b6588be9a94
 
-commit ac1ec9545947d9f9657259f55d04cb49d3a94c8a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 16 03:33:14 2022 +0000
+commit 018d671d78145f03d6f07ae9d64d51321da70325
+Author: tb@openbsd.org <tb@openbsd.org>
+Date:   Wed Jan 4 22:48:57 2023 +0000
 
-    upstream: sftp: Be a bit more clever about completions
-    
-    There are commands (e.g. "get" or "put") that accept two
-    arguments, a local path and a remote path. However, the way
-    current completion is written doesn't take this distinction into
-    account and always completes remote or local paths.
+    upstream: Copy bytes from the_banana[] rather than banana()
     
-    By expanding CMD struct and "cmds" array this distinction can be
-    reflected and with small adjustment to completer code the correct
-    path can be completed.
+    Fixes test failure due to segfault seen on arm64 with xonly snap.
     
-    By Michal Privoznik, ok dtucker@
+    ok djm
     
-    OpenBSD-Commit-ID: 1396d921c4eb1befd531f5c4a8ab47e7a74b610b
+    OpenBSD-Regress-ID: 86e2aa4bbd1dff1bc4ebb2969c0d6474485be046
 
-commit 590db83384f9d99fc51c84505792d26d1ef60df9
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 16 03:13:34 2022 +0000
+commit ab6bb69e251faa8b24f81b25c72ec0120f20cad4
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Jan 6 19:13:36 2023 +1100
 
-    upstream: sftp: Don't attempt to complete arguments for
-    
-    non-existent commands
+    unbreak scp on NetBSD 4.x
     
-    If user entered a non-existent command (e.g. because they made a
-    typo) there is no point in trying to complete its arguments. Skip
-    calling complete_match() if that's the case.
+    e555d5cad5 effectively increased the default copy buffer size for SFTP
+    transfers. This caused NetBSD 4.x to hang during the "copy local file to
+    remote file in place" scp.sh regression test.
     
-    From Michal Privoznik
+    This puts back the original 32KB copy buffer size until we can properly
+    figure out why.
     
-    OpenBSD-Commit-ID: cf39c811a68cde2aeb98fc85addea4000ef6b07a
+    lots of debugging assistance from dtucker@
 
-commit ff9809fdfd1d9a91067bb14a77d176002edb153c
+commit 2d1ff2b9431393ad99ef496d5e3b9dd0d4f5ac8c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 14 00:14:37 2022 +0000
+Date:   Fri Jan 6 02:47:18 2023 +0000
 
-    upstream: sk_enroll: never drop SSH_SK_USER_VERIFICATION_REQD flag
+    upstream: Implement channel inactivity timeouts
     
-    from response
+    This adds a sshd_config ChannelTimeouts directive that allows channels that
+    have not seen traffic in a configurable interval to be automatically closed.
+    Different timeouts may be applied to session, X11, agent and TCP forwarding
+    channels.
     
-    Now that all FIDO signing calls attempt first without PIN and then
-    fall back to trying PIN only if that attempt fails, we can remove the
-    hack^wtrick that removed the UV flag from the keys returned during
-    enroll.
+    Note: this only affects channels over an opened SSH connection and not
+    the connection itself. Most clients close the connection when their channels
+    go away, with a notable exception being ssh(1) in multiplexing mode.
     
-    By Corinna Vinschen
+    ok markus dtucker
     
-    OpenBSD-Commit-ID: 684517608c8491503bf80cd175425f0178d91d7f
+    OpenBSD-Commit-ID: ae8bba3ed9d9f95ff2e2dc8dcadfa36b48e6c0b8
 
-commit 940dc10729cb5a95b7ee82c10184e2b9621c8a1d
+commit 0e34348d0bc0b1522f75d6212a53d6d1d1367980
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 14 00:13:13 2022 +0000
+Date:   Fri Jan 6 02:42:34 2023 +0000
 
-    upstream: a little extra debugging
+    upstream: Add channel_set_xtype()
     
-    OpenBSD-Commit-ID: edf1601c1d0905f6da4c713f4d9cecc7d1c0295a
+    This sets an "extended" channel type after channel creation (e.g.
+    "session:subsystem:sftp") that will be used for setting channel inactivity
+    timeouts.
+    
+    ok markus dtucker
+    
+    OpenBSD-Commit-ID: 42564aa92345045b4a74300528f960416a15d4ca
 
-commit 4b5f91cb959358141181b934156513fcb8a6c1e3
+commit ceedf09b2977f3a756c759a6e7eb8f8e9db86a18
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Sep 14 00:02:03 2022 +0000
+Date:   Fri Jan 6 02:41:49 2023 +0000
 
-    upstream: ssh-agent: attempt FIDO key signing without PIN and use
+    upstream: tweak channel ctype names
     
-    the error to determine whether a PIN is required and prompt only if
-    necessary. from Corinna Vinschen
+    These are now used by sshd_config:ChannelTimeouts to specify timeouts by
+    channel type, so force them all to use a similar format without whitespace.
     
-    OpenBSD-Commit-ID: dd6be6a0b7148608e834ee737c3479b3270b00dd
+    ok dtucker markus
+    
+    OpenBSD-Commit-ID: 66834765bb4ae14f96d2bb981ac98a7dae361b65
 
-commit 113523bf0bc33600b07ebb083572c8c346b6fdf4
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Sun Sep 11 06:38:11 2022 +0000
+commit c60438158ad4b2f83d8504257aba1be7d0b0bb4b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jan 6 02:39:59 2023 +0000
 
-    upstream: .Li -> .Vt where appropriate; from josiah frentsos,
+    upstream: Add channel_force_close()
     
-    tweaked by schwarze
+    This will forcibly close an open channel by simulating read/write errors,
+    draining the IO buffers and calling the detach function.
     
-    ok schwarze
+    Previously the detach function was only ever called during channel garbage
+    collection, but there was no way to signal the user of a channel (e.g.
+    session.c) that its channel was being closed deliberately (vs. by the
+    usual state-machine logic). So this adds an extra "force" argument to the
+    channel cleanup callback to indicate this condition.
     
-    OpenBSD-Commit-ID: 565046e3ce68b46c2f440a93d67c2a92726de8ed
-
-commit 86af013b56cecb5ee58ae0bd9d495cd586fc5918
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Sat Sep 10 08:50:53 2022 +0000
-
-    upstream: fix repeated words ok miod@ jmc@
+    ok markus dtucker
     
-    OpenBSD-Commit-ID: 6765daefe26a6b648cc15cadbbe337596af709b7
+    OpenBSD-Commit-ID: 23052707a42bdc62fda2508636e624afd466324b
 
-commit 0ba39b93b326a7d5dfab776cc9b9d326161a9b16
+commit d478cdc7ad6edd4b1bcd1e86fb2f23194ff33d5a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 9 03:31:42 2022 +0000
+Date:   Fri Jan 6 02:38:23 2023 +0000
 
-    upstream: notifier_complete(NULL, ...) is a noop, so no need to test
+    upstream: replace manual poll/ppoll timeout math with ptimeout API
     
-    that ctx!=NULL; from Corinna Vinschen
+    feedback markus / ok markus dtucker
     
-    OpenBSD-Commit-ID: ade2f2e9cc519d01a586800c25621d910bce384a
+    OpenBSD-Commit-ID: c5ec4f2d52684cdb788cd9cbc1bcf89464014be2
 
-commit be197635329feb839865fdc738e34e24afd1fca8
-Author: Sam James <sam@gentoo.org>
-Date:   Thu Sep 8 02:49:29 2022 +0100
+commit 4adf3817a24efe99b06e62630577d683c7cd8065
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jan 6 02:37:04 2023 +0000
 
-    openbsd-compat/bsd-asprintf: add <stdio.h> include for vsnprintf
+    upstream: add ptimeout API for keeping track of poll/ppoll
     
-    Fixes the following build failure with Clang 15 on musl:
-    ```
-    bsd-asprintf.c:51:8: error: call to undeclared library function 'vsnprintf' with type 'int (char *, unsigned long, const char *, struct __va_list_tag *)'; ISO C99 and laterclang -O2 -pipe -fdiagnostics-color=always -frecord-gcc-switches -pipe -Wunknown-warning-option -Qunused-arguments -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -Wmisleading-indentation -Wbitwise-instead-of-logical -fno-strict-aliasing -mretpoline  -ftrapv -fzero-call-used-regs=all -fno-builtin-memset -fstack-protector-strong -fPIE   -I. -I.  -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -DSSHDIR=\"/etc/ssh\" -D_PATH_SSH_PROGRAM=\"/usr/bin/ssh\" -D_PATH_SSH_ASKPASS_DEFAULT=\"/usr/lib/misc/ssh-askpass\" -D_PATH_SFTP_SERVER=\"/usr/lib/misc/sftp-server\" -D_PATH_SSH_KEY_SIGN=\"/usr/lib/misc/ssh-keysign\" -D_PATH_SSH_PKCS11_HELPER=\"/usr/lib/misc/ssh-pkcs11-helper\" -D_PATH_SSH_SK_HELPER=\"/usr/lib/misc/ssh-sk-helper\" -D_PATH_SSH_PIDDIR=\"/run\" -D_PATH_PRIVSEP_CHROOT_DIR=\"/var/empty\" -DHAVE_CONFIG_H -c cipher-aes.c -o cipher-aes.o
-     do not support
-          implicit function declarations [-Wimplicit-function-declaration]
-            ret = vsnprintf(string, INIT_SZ, fmt, ap2);
-                  ^
-    bsd-asprintf.c:51:8: note: include the header <stdio.h> or explicitly provide a declaration for 'vsnprintf'
-    1 error generated.
-    ```
-
-commit 6cb6f660bb35f77a0456dd2581ddf39c29398a5e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Sep 2 16:43:27 2022 +1000
-
-    Remove DEF_WEAK, it's already in defines.h.
-
-commit ce39e7d8b70c4726defde5d3bc4cb7d40d131153
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Sep 2 14:28:14 2022 +1000
-
-    Resync arc4random with OpenBSD.
+    timeouts; ok dtucker markus
     
-    This brings us up to current, including djm's random-reseeding change,
-    as prompted by logan at cyberstorm.mu in bz#3467.  It brings the
-    platform-specific hooks from LibreSSL Portable, simplified to match our
-    use case.  ok djm@.
+    OpenBSD-Commit-ID: 3335268ca135b3ec15a947547d7cfbb8ff929ead
 
-commit beaddde26f30e2195b8aa4f3193970e140e17305
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Sep 2 14:20:04 2022 +1000
+commit 8c7c69d32375d2f3ce9da0109c9bffc560842316
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Jan 5 05:49:13 2023 +0000
 
-    Move OPENBSD ORIGINAL marker.
+    upstream: suppress "Connection closed" message when in quiet mode
     
-    Putting this after the copyright statement (which doesn't change)
-    instead of before the version identifier (which does) prevents merge
-    conflicts when resyncing changes.
+    OpenBSD-Commit-ID: 8a3ab7176764da55f60bfacfeae9b82d84e3908f
 
-commit c83e467ead67a8cb48ef4bec8085d6fb880a2ff4
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Sep 2 14:17:28 2022 +1000
+commit 845ceecea2ac311b0c267f9ecbd34862e1876fc6
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jan 2 07:03:57 2023 +0000
 
-    Remove arc4random_uniform from arc4random.c
+    upstream: regression test for PermitRemoteOpen
     
-    This was previously moved into its own file (matching OpenBSD) which
-    prematurely committed in commit 73541f2.
+    OpenBSD-Regress-ID: 8271aafbf5c21950cd5bf966f08e585cebfe630c
 
-commit 5f45c2395c60865e59fa44152ff1d003a128c5bc
+commit b3daa8dc582348d6ab8150bc1e571b7aa08c5388
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Sep 2 04:20:02 2022 +0000
+Date:   Mon Jan 2 07:03:30 2023 +0000
 
-    upstream: sk-usbhid: fix key_lookup() on tokens with built-in UV
+    upstream: fix bug in PermitRemoteOpen which caused it to ignore its
     
-    explicitly test whether the token performs built-in UV (e.g. biometric
-    tokens) and enable UV in that case. From Pedro Martelletto via GHPR#388
+    first argument unless it was one of the special keywords "any" or "none".
     
-    OpenBSD-Commit-ID: 007eb7e387d27cf3029ab06b88224e03eca62ccd
-
-commit 03277a4aa49b80af541a3e691f264c0c0d8f9cec
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Aug 31 20:26:30 2022 +1000
-
-    Move sftp from valgrind-2 to 3 to rebalance.
-
-commit fcf5365da69c516817321ba89c3a91df98d098df
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Aug 31 02:56:40 2022 +0000
-
-    upstream: whitespace
+    Reported by Georges Chaudy in bz3515; ok dtucker@
     
-    OpenBSD-Commit-ID: c2bcbf93610d3d62ed206cdf9bf9ff98c6aaf232
-
-commit e60136a3d7a223dd8e84ba8a6895bc3142360993
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Aug 29 13:27:45 2022 +1000
-
-    additional keys
+    OpenBSD-Commit-ID: c5678a39f1ff79993d5ae3cfac5746a4ae148ea5
 
-commit 2b02dcb505288c462d1b5dd1ac04e603d01340eb
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Aug 29 13:23:43 2022 +1000
+commit 0872663a7be0301bcc3d49acdbc9b740a3d972d4
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Mon Dec 26 19:16:03 2022 +0000
 
-    cross-sign allowed_signers with PGP key
+    upstream: spelling fixes; from paul tagliamonte amendments to his
     
-    Provides continuity of trust from legacy PGP release key to
-    the SSHSIG signing keys that we will use henceforth for git
-    signing.
+    diff are noted on tech
+    
+    OpenBSD-Commit-ID: d776dd03d0b882ca9c83b84f6b384f6f9bd7de4a
 
-commit 51b345f177ae981b8755f6bdf8358b1cc5e83d67
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Aug 27 21:49:27 2022 +1000
+commit 797da2812a71785b34890bb6eb44767a7d09cd34
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Dec 16 07:13:22 2022 +0000
 
-    Add libcrypt-devel to cygwin-release deps.
+    upstream: Mention that scp uses the SFTP protocol and remove
     
-    Based on feedback from vinschen at redhat.com.
+    reference to legacy flag. Spotted by, feedback and ok jmc@
+    
+    OpenBSD-Commit-ID: 9dfe04966f52e941966b46c7a2972147f95281b3
 
-commit 9f81736cf16dd8dda1c8942f1973a5f80b8cd78c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Aug 27 09:37:40 2022 +1000
+commit 93f2ce8c050a7a2a628646c00b40b9b53fef93ef
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Dec 16 06:56:47 2022 +0000
 
-    Add Windows 2022 test targets.
+    upstream: Clear signal mask early in main(); sshd may have been
+    
+    started with one or more signals masked (sigprocmask(2) is not cleared
+    on fork/exec) and this could interfere with various things, e.g. the
+    login grace timer.
+    
+    Execution environments that fail to clear the signal mask before running
+    sshd are clearly broken, but apparently they do exist.
+    
+    Reported by Sreedhar Balasubramanian; ok dtucker@
+    
+    OpenBSD-Commit-ID: 77078c0b1c53c780269fc0c416f121d05e3010ae
 
-commit 85e1a69243f12be8520438ad6a3cfdc0b7fcbb2d
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 26 16:26:06 2022 +1000
+commit 4acfaabfae41badb9d334a2ee88c5c6ad041c0d5
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Dec 16 06:52:48 2022 +0000
 
-    Add cygwin-release test target.
+    upstream: add -X to usage();
     
-    This also moves the cygwin package install from the workflow file to
-    setup_ci.sh so that we can install different sets of Cygwin packages
-    for different test configs.
+    OpenBSD-Commit-ID: 1bdc3df7de11d766587b0428318336dbffe4a9d0
 
-commit 92382dbe8bf9ea1225b16858f9b9b208c15c7e8d
+commit e555d5cad5afae7d5ef2bbc02ca591178fe16fed
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 26 08:16:27 2022 +0000
+Date:   Fri Dec 16 03:40:03 2022 +0000
 
-    upstream: whitespace
+    upstream: add a -X option to both scp(1) and sftp(1) to allow
     
-    OpenBSD-Commit-ID: a5d015efbfd228dc598ffdef612d2da3a579e5d8
+    control over some SFTP protocol knobs: the copy buffer length and
+    the number of inflight requests, both of which are used during
+    upload/download.
+    
+    Previously these could be controlled in sftp(1) using the -b/-R options.
+    This makes them available in both SFTP protocol clients using the same
+    option character sequence.
+    
+    ok dtucker@
+    
+    OpenBSD-Commit-ID: 27502bffc589776f5da1f31df8cb51abe9a15f1c
 
-commit 70a5de0a50e84d7250eb4e4537f765599f64c4af
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 26 08:12:56 2022 +0000
+commit 5a7a7acab2f466dc1d7467b5d05d35268c3137aa
+Author: deraadt@openbsd.org <deraadt@openbsd.org>
+Date:   Thu Dec 15 18:20:39 2022 +0000
 
-    upstream: whitespace
+    upstream: The idiomatic way of coping with signed char vs unsigned
     
-    OpenBSD-Commit-ID: d297e4387935d4aef091c5e9432578c2e513f538
+    char (which did not come from stdio read functions) in the presence of
+    ctype macros, is to always cast to (unsigned char).  casting to (int)
+    for a "macro" which is documented to take int, is weird.  And sadly wrong,
+    because of the sing extension risk.. same diff from florian
+    
+    OpenBSD-Commit-ID: 65b9a49a68e22ff3a0ebd593f363e9f22dd73fea
 
-commit 3a683a19fd116ea15ebf8aa13d02646cceb302a9
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Aug 26 14:23:55 2022 +1000
+commit b0b58222c7cc62efd8212c4fb65a545f58ebb22d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Dec 19 18:49:51 2022 +1100
 
-    initial list of allowed signers
+    Simply handling of SSH_CONNECTION PAM env var.
+    
+    Prompted by bz#3508: there's no need to cache the value of
+    sshpam_conninfo so remove the global.  While there, add check of
+    return value from pam_putenv.  ok djm@
 
-commit 6851f4b8c3fc1b3e1114c56106e4dc31369c8513
+commit ed8444572ae684fdb892f97bae342c6cb6456f04
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 19 17:22:18 2022 +1000
+Date:   Mon Dec 19 18:42:34 2022 +1100
 
-    Install Cygwin packages based on OS not config.
+    Add tests for LibreSSL 3.7.0 and OpenSSL 1.1.1s.
 
-commit f96480906893ed93665df8cdf9065865c51c1475
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 19 06:07:47 2022 +0000
+commit abb9a8aaddfcacbd12641f6e4f203da0fa85a287
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Dec 18 21:36:25 2022 +1100
 
-    upstream: attemp FIDO key signing without PIN and use the error
-    
-    code returned to fall back only if necessary. Avoids PIN prompts for FIDO
-    tokens that don't require them; part of GHPR#302
-    
-    OpenBSD-Commit-ID: 4f752aaf9f2e7c28bcaaf3d4f8fc290131bd038e
+    Use sudo when resetting perms on directories.
 
-commit 5453333b5d28e313284cb9aae82899704103f98d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 19 05:53:28 2022 +0000
+commit 2f5664c5908d84697cbe91302d5d5c4d83cb2121
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Dec 18 21:19:33 2022 +1100
 
-    upstream: remove incorrect check that can break enrolling a
-    
-    resident key (introduced in r1.40)
+    Set group perms on regress dir.
     
-    OpenBSD-Commit-ID: 4cab364d518470e29e624af3d3f9ffa9c92b6f01
+    This ensures that the tests don't fail due to StrictMode checks.
 
-commit ff89b1bed80721295555bd083b173247a9c0484e
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Aug 19 04:02:46 2022 +0000
+commit 137196300fc1540affadde880210f02ba6cb4abf
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Dec 18 21:13:42 2022 +1100
 
-    upstream: Strictly enforce the maximum allowed SSH2 banner size in
-    
-    ssh-keyscan and prevent a one-byte buffer overflow.  Patch from Qualys, ok
-    djm@
-    
-    OpenBSD-Commit-ID: 6ae664f9f4db6e8a0589425f74cd0bbf3aeef4e4
+    Fetch regress logs from obj dir.
 
-commit 1b470b9036639cef4f32fb303bb35ea0b711178d
+commit 5f93c4836527d9fda05de8944a1c7b4a205080c7
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 19 15:18:09 2022 +1000
+Date:   Tue Dec 13 20:59:54 2022 +1100
 
-    Fix cygwin conditional steps.
+    obsdsnap test VMs runs-on libvirt too.
 
-commit fd6ee741ab16714b7035d60aca924123ba28135a
+commit 8386886fb1ab7fda73069fb0db1dbe0e5a52f758
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 19 15:12:57 2022 +1000
+Date:   Tue Dec 13 20:55:37 2022 +1100
 
-    Add a bit more debug output.
+    Run upstream obsdsnap tests on ephemeral runners.
 
-commit a9305c4c739f4d91a3d3a92c0b6d4949404a36c5
+commit b6e01459b55ece85d7f296b2bc719d1841e1009e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 12 15:08:47 2022 +1000
+Date:   Tue Dec 13 20:48:56 2022 +1100
 
-    Add Cygwin (on windows-2019) test target.
-    
-    In addition to installing the requisite Cygwin packages, we also need to
-    explicitly invoke "sh" for steps that run other scripts since the runner
-    environment doesn't understand #! paths.
+    Move obsdsnap test VMs to ephemeral runners.
 
-commit 5062ad48814b06162511c4f5924a33d97b6b2566
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 19 03:06:30 2022 +0000
+commit ea6fdf9a1aa71a411f7db218a986392c4fb55693
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Dec 9 18:00:21 2022 +1100
 
-    upstream: double free() in error path; from Eusgor via GHPR333
+    use calloc for allocating arc4random structs
     
-    OpenBSD-Commit-ID: 39f35e16ba878c8d02b4d01d8826d9b321be26d4
+    ok dtucker
 
-commit 5a5c580b48fc6006bdfa731fc2f6d4945c2c0e4e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 18 21:36:39 2022 +1000
+commit 4403b62f5548e91389cb3339d26a9d0c4bb07b34
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Dec 9 00:22:29 2022 +0000
 
-    Check for perms to run agent-getpeereid test.
+    upstream: Warn if no host keys for hostbased auth can be loaded.
     
-    Ubuntu 22.04 defaults to private home dirs which prevents "nobody"
-    running ssh-add during the agent-getpeereid test.  Check for this and
-    add the necessary permissions.
+    OpenBSD-Commit-ID: 2a0a13132000cf8d3593133c1b49768aa3c95977
 
-commit cd06a76b7ccc706e2bb4f1cc4aa9e9796a28a812
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Aug 17 16:04:16 2022 +1000
+commit a6183e25e3f1842e21999fe88bc40bb99b121dc3
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Dec 9 00:17:40 2022 +0000
 
-    on Cygwin, prefer WinHello FIDO device
+    upstream: Add server debugging for hostbased auth.
     
-    If no FIDO device was explictly specified, then prefer the
-    windows://hello FIDO device. An exception to this is when
-    probing resident FIDO keys, in which case hardware FIDO
-    devices are preferred.
+    auth_debug_add queues messages about the auth process which is sent to
+    the client after successful authentication.  This also sends those to
+    the server debug log to aid in debugging.  From bz#3507, ok djm@
+    
+    OpenBSD-Commit-ID: 46ff67518cccf9caf47e06393e2a121ee5aa258a
 
-commit 47f72f534ac5cc2cd3027675a3df7b00a8f77575
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Aug 17 06:01:57 2022 +0000
+commit b85c3581c16aaf6e83b9a797c80705a56b1f312e
+Author: cheloha@openbsd.org <cheloha@openbsd.org>
+Date:   Sun Dec 4 23:50:49 2022 +0000
 
-    upstream: add an extra flag to sk_probe() to indicate whether we're
+    upstream: remove '?' from getopt(3) loops
     
-    probing for a FIDO resident key or not. Unused here, but will make like
-    easier for portable
+    userspace: remove vestigial '?' cases from top-level getopt(3) loops
     
-    OpenBSD-Commit-ID: 432c8ff70e270378df9dbceb9bdeaa5b43b5a832
+    getopt(3) returns '?' when it encounters a flag not present in the in
+    the optstring or if a flag is missing its option argument.  We can
+    handle this case with the "default" failure case with no loss of
+    legibility.  Hence, remove all the redundant "case '?':" lines.
+    
+    Prompted by dlg@.  With help from dlg@ and millert@.
+    
+    Link: https://marc.info/?l=openbsd-tech&m=167011979726449&w=2
+    
+    ok naddy@ millert@ dlg@
+    
+    OpenBSD-Commit-ID: b2f89346538ce4f5b33ab8011a23e0626a67e66e
 
-commit edb0bcb3c79b16031dc87a8e57aecc3c4a3414f0
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Tue Aug 16 20:24:08 2022 +0000
+commit 9a067e8d28a2249fd73f004961e30c113ee85e5d
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Dec 7 11:45:43 2022 +0000
 
-    upstream: use .Cm for "sign"; from josiah frentsos
+    upstream: Fix comment typo.
     
-    OpenBSD-Commit-ID: 7f80a53d54857ac6ae49ea6ad93c5bd12231d1e4
+    OpenBSD-Regress-ID: 3b04faced6511bb5e74648c6a4ef4bf2c4decf03
 
-commit cccb011e130cbbac538b1689d10e4a067298df8b
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Thu Aug 11 20:19:35 2022 +0200
+commit ce3c3e78ce45d68a82c7c8dc89895f297a67f225
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Dec 7 18:58:25 2022 +1100
 
-    Revert "check_sk_options: add temporary WinHello workaround"
+    Add SANDBOX_DEBUG to the kitchensink test build.
+
+commit bc234605fa3eb10f56bf0d74c8ecb0d91ada9d05
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Dec 7 18:38:25 2022 +1100
+
+    disable SANDBOX_SECCOMP_FILTER_DEBUG
     
-    Cygwin now comes with libfido2 1.11.0, so this workaround
-    isn't required anymore.
+    It was mistakenly enabled in 2580916e4872
     
-    This reverts commit 242c044ab111a37aad3b0775727c36a4c5f0102c.
+    Reported by Peter sec-openssh-com.22.fichtner AT 0sg.net
+
+commit b087c5cfa011b27992e01589314fec830266f99d
+Author: Rose <83477269+AtariDreams@users.noreply.github.com>
+Date:   Tue Nov 29 15:12:54 2022 -0500
+
+    Update autotools
     
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    Regenerate config files using latest autotools
 
-commit 9468cd7cf9d989dfa2ac20e2a0268ba6e93bfa5a
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Thu Aug 11 20:18:17 2022 +0200
+commit d63f5494978a185c7421d492b9c2f6f05bb54138
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Dec 6 12:22:36 2022 +1100
 
-    fido_dev_is_winhello: return 0, not "false"
+    Fix typo in comment.  Spotted by tim@
+
+commit 73dcca12115aa12ed0d123b914d473c384e52651
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sun Dec 4 11:03:11 2022 +0000
+
+    upstream: Remove duplicate includes.
     
-    "false" is not used anywhere in OpenSSH, so return 0 like
-    everywhere else.
+     Patch from AtariDreams via github PR#364.
     
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    OpenBSD-Commit-ID: b9186638a05cb8b56ef7c0de521922b6723644ea
 
-commit 730a80609472ee0451c99482d75c9c41f3ebc42d
+commit 3cec15543010bc8d6997d896b1717a650afb7e92
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 12 05:20:28 2022 +0000
+Date:   Fri Dec 2 04:40:27 2022 +0000
 
-    upstream: sftp-server: support home-directory request
-    
-    Add support to the sftp-server for the home-directory extension defined
-    in draft-ietf-secsh-filexfer-extensions-00. This overlaps a bit with the
-    existing expand-path@openssh.com, but uses a more official protocol name,
-    and so is a bit more likely to be implemented by non-OpenSSH clients.
+    upstream: make struct sshbuf private
     
-    From Mike Frysinger, ok dtucker@
+    and remove an unused field; ok dtucker
     
-    OpenBSD-Commit-ID: bfc580d05cc0c817831ae7ecbac4a481c23566ab
+    OpenBSD-Commit-ID: c7a3d77c0b8c153d463398606a8d57569186a0c3
 
-commit 5e820bf79ce3ce99ef7e98b0ab642b0a0a4f396c
+commit 5796bf8ca9535f9fa7d01829a540d2550e05c860
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 12 14:56:55 2022 +1000
+Date:   Fri Dec 2 11:43:36 2022 +1100
 
-    Replace deprecated ubuntu-18.04 runners with 22.04
+    Restore ssh-agent permissions on exit.
+    
+    ...enough that subsequent builds can overwrite ssh-agent if necessary.
 
-commit 87b0d9c1b789d3ff958ec45df2ac912e24461bae
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 11 22:48:23 2022 +1000
+commit ccf5a13868cbb4659107458cac1e017c98abcbda
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Dec 1 02:22:13 2022 +0000
 
-    Add a timegm implementation from Heimdal via Samba.
+    upstream: Clean up ssh-add and ssh-agent logs.
     
-    Fixes build on (at least Solaris 10).
+    OpenBSD-Regress-ID: 9eda8e4c3714d7f943ab2e73ed58a233bd29cd2c
 
-commit d0c4fa58594577994921b593f10037c5282597ca
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 11 14:23:58 2022 +1000
+commit 7a8b40cf6a5eda80173140cc6750a6db8412fa87
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Dec 1 02:19:29 2022 +0000
 
-    Rerun tests if any .github config file changes.
+    upstream: Log output of ssh-agent and ssh-add
+    
+    This should  make debugging easier.
+    
+    OpenBSD-Regress-ID: 5974b02651f428d7e1079b41304c498ca7e306c8
 
-commit 113fe6c77ab43769fc61e953d07cb619fd7ea54b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 11 13:33:51 2022 +1000
+commit 4a1805d532616233dd6072e5cd273b96dd3062e6
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Nov 29 22:41:14 2022 +0000
 
-    Skip hostbased during Valgrind tests.
-    
-    Valgrind doesn't let ssh exec ssh-keysign (because it's setuid) so skip
-    it during the Valgrind based tests.
+    upstream: Add void to client_repledge args to fix compiler warning. ok djm@
     
-    See https://bugs.kde.org/show_bug.cgi?id=119404 for a discussion of this
-    (ironically there the problematic binary was ssh(1) back when it could
-    still be setuid).
+    OpenBSD-Commit-ID: 7e964a641ce4a0a0a11f047953b29929d7a4b866
 
-commit b98a42afb69d60891eb0488935990df6ee571c4d
+commit 815c4704930aa449edf6e812e99d69e9ffd31f01
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Aug 11 01:57:50 2022 +0000
+Date:   Mon Nov 28 01:38:22 2022 +0000
 
-    upstream: add some tests for parse_absolute_time(), including cases
+    upstream: tighten pledge(2) after session establishment
     
-    where it is forced to the UTC timezone. bz3468 ok dtucker
+    feedback, ok & testing in snaps deraadt@
     
-    OpenBSD-Regress-ID: ea07ca31c2f3847a38df028ca632763ae44e8759
+    OpenBSD-Commit-ID: aecf4d49d28586dfbcc74328d9333398fef9eb58
 
-commit ec1ddb72a146fd66d18df9cd423517453a5d8044
+commit f7cebbbf407d772ed71403d314343766782fe540
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Aug 11 01:56:51 2022 +0000
+Date:   Mon Nov 28 01:37:36 2022 +0000
 
-    upstream: allow certificate validity intervals, sshsig verification
+    upstream: New EnableEscapeCommandline ssh_config(5) option
     
-    times and authorized_keys expiry-time options to accept dates in the UTC time
-    zone in addition to the default of interpreting them in the system time zone.
-    YYYYMMDD and YYMMDDHHMM[SS] dates/times will be interpreted as UTC if
-    suffixed with a 'Z' character.
+    This option (default "no") controls whether the ~C escape is available.
+    Turning it off by default means we will soon be able to use a stricter
+    default pledge(2) in the client.
     
-    Also allow certificate validity intervals to be specified in raw
-    seconds-since-epoch as hex value, e.g. -V 0x1234:0x4567890. This
-    is intended for use by regress tests and other tools that call
-    ssh-keygen as part of a CA workflow.
+    feedback deraadt@ dtucker@; tested in snaps for a while
     
-    bz3468 ok dtucker
+    OpenBSD-Commit-ID: 7e277595d60acb8263118dcb66554472257b387a
+
+commit d323f7ecf52e3d4ec1f4939bf31693e02f891dca
+Author: mbuhl@openbsd.org <mbuhl@openbsd.org>
+Date:   Fri Nov 18 19:47:40 2022 +0000
+
+    upstream: In channel_request_remote_forwarding the parameters for
     
-    OpenBSD-Commit-ID: 454db1cdffa9fa346aea5211223a2ce0588dfe13
+    permission_set_add are leaked as they are also duplicated in the call. Found
+    by CodeChecker. ok djm
+    
+    OpenBSD-Commit-ID: 4aef50fa9be7c0b138188814c8fe3dccc196f61e
 
-commit 4df246ec75751da7eb925e1880498300d8bda187
+commit 62cc33e6eed847aafdc29e34aa69e9bd82a0ee16
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 11 10:23:55 2022 +1000
+Date:   Wed Nov 30 11:23:11 2022 +1100
 
-    Fix conditional for running hostbased tests.
+    Use -fzero-call-used-regs=used on clang 15.
+    
+    clang 15 seems to have a problem with -fzero-call-used-reg=all which
+    causes spurious "incorrect signature" failures with ED25519.  On those
+    versions, use -fzero-call-used-regs=used instead.  (We may add exceptions
+    later if specific versions prove to be OK).  Also move the GCC version
+    check to match.
+    
+    Initial investigation by Daniel Pouzzner (douzzer at mega nu), workaround
+    suggested by Bill Wendling (morbo at google com).  bz#3475, ok djm@
 
-commit 2580916e48721802220c61ce9e0df1297c00bc07
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Aug 11 08:58:28 2022 +1000
+commit f84b9cffd52c9c5c359a54a1929f9948e803ab1d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Nov 28 21:09:28 2022 +1100
 
-    fix SANDBOX_SECCOMP_FILTER_DEBUG
+    Skip unit tests on slow riscv64 hardware.
 
-commit fdbd5bf507fc271ff813714fab8a72ff2c6cb5ca
+commit 9f2747e0bed3faca92679eae69aef10c95dc82f5
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Aug 10 17:35:52 2022 +1000
+Date:   Sun Nov 27 15:26:22 2022 +1100
 
-    Test hostbased auth on github runners.
+    Rework how selfhosted tests interact with runners.
+    
+    Previously there was one runner per test target (mostly VMs).  This had
+    a few limitations:
+     - multiple tests that ran on the same target (eg multiple build
+       configs) were serialized on availability or that runner.
+     - it needed manual balancing of VMs over host machines.
+    
+    To address this, make VMs that use ephemeral disks (ie most of them)
+    all use a pool of runners with the "libvirt" label.  This requires that
+    we distinguish between "host" and "target" for those.  Native runners
+    and VMs with persistent disks (eg the constantly-updated snapshot ones)
+    specify the same host and target.
+    
+    This should improve test throughput.
 
-commit 7e2f51940ba48a1c0fae1107801ea643fa83c971
+commit d664ddaec87bdc7385be8ef7f1337793e1679d48
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Aug 10 17:25:24 2022 +1000
+Date:   Sun Nov 27 12:19:37 2022 +1100
 
-    Rename our getentropy to prevent possible loops.
+    Run vmstartup from temp dir.
     
-    Since arc4random seeds from getentropy, and we use OpenSSL for that
-    if enabled, there's the possibility that if we build on a system that
-    does not have getentropy then run on a system that does have it, then
-    OpenSSL could end up calling our getentropy and getting stuck in a loop.
-    Pointed out by deraadt@, ok djm@
+    This will allow us to create ephemeral disk images per-runner.
 
-commit 7a01f61be8d0aca0e975e7417f26371495fe7674
+commit 0fa16e952b1fc1c4cf65e3dd138b0e87003e2e45
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 8 12:17:04 2022 +1000
+Date:   Sun Nov 27 12:14:00 2022 +1100
 
-    Actually put HAVE_STDINT_H around the stdint.h.
+    Make "config" in matrix singular and pass in env.
+    
+    This will allow the startup scripts to adapt their behaviour based on
+    the type and config.
 
-commit 73541f29f0b50480da6c20dceb7a7191bd8ea7d3
+commit e8857043af54809187be1e8b06749db61112899f
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Aug 8 10:30:34 2022 +1000
+Date:   Sun Nov 27 11:42:22 2022 +1100
 
-    Give unused param a name.
-    
-    Fixes builds on platforms that do have fido2 but don't have
-    fido_dev_is_winhello.
+    Add "libvirt" label to dfly30.
 
-commit 2a108c0ea960381bd9b14ee0d84e818a23df4482
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Aug 5 05:01:40 2022 +0000
+commit 9775473d84902dc37753686cd10ae71fbe67efda
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Nov 27 09:28:20 2022 +1100
 
-    upstream: don't prompt for FIDO passphrase before attempting to enroll
-    
-    the credential, just let the enroll operating fail and we'll attempt to get a
-    PIN anyway. Might avoid some unneccessary PIN prompts.
-    
-    Part of GHPR#302 from Corinna Vinschen; ok dtucker@
+    Rename "os" in matrix to "target".
     
-    OpenBSD-Commit-ID: bd5342ffc353ee37d39617906867c305564d1ce2
+    This is in preparation to distinguish this from the host that the runner
+    runs on in case where they are separate (eg VMs).
 
-commit 2886975c0ad9244e60dc5e4be34fde3aa573a4b5
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Fri Feb 11 14:33:41 2022 +0100
+commit 04fd00ceff39f4544ced6f5342060abe584835d0
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Nov 27 09:23:04 2022 +1100
 
-    sk_sign: set FIDO2 uv attribute explicitely for WinHello
-    
-    WinHello via libfido2 performs user verification by default.
-    However, if we stick to that, there's no way to differentiate
-    between keys created with or without "-O  verify-required".
-    Set FIDO2 uv attribute explicitely to FIDO_OPT_FALSE, then check
-    if user verification has been requested.
-    
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    Remove unused self-hosted test targets.
 
-commit 242c044ab111a37aad3b0775727c36a4c5f0102c
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Tue Feb 15 11:28:08 2022 +0100
+commit c9d9fcad2a11c1cd1550a541f44091d65f0b5584
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Nov 27 09:16:15 2022 +1100
 
-    check_sk_options: add temporary WinHello workaround
-    
-    Up to libfido 1.10.0, WinHello advertises "clientPin" rather
-    than "uv" capability.  This is fixed in 1.11.0.  For the time
-    being, workaround it here.
+    Remove explicit "default" test config argument.
     
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    Not specifying the test config implicitly selects default args.
 
-commit 78774c08cc4b4997382975b0f414a86e06b6780c
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Thu Feb 10 18:19:29 2022 +0100
+commit 15a01cf15f396f87c6d221c5a6af98331c818962
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 23 13:18:54 2022 +1100
 
-    compat code for fido_dev_is_winhello()
-    
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    Add fallback for old platforms w/out MAP_ANON.
 
-commit 3d3a932a019aedfb891e0779bb4990cd5008a390
+commit 6b9bbbfe8b26db6e9a30a7e08c223e85421aed98
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Aug 5 13:12:27 2022 +1000
+Date:   Wed Nov 23 13:09:11 2022 +1100
 
-    Factor out getrnd() and rename to getentropy().
+    If we haven't found it yet, recheck for sys/stat.h.
     
-    Factor out the arc4random seeding into its own file and change the
-    interface to match getentropy.  Use native getentropy if available.
-    This will make it easier to resync OpenBSD changes to arc4random.
-    Prompted by bz#3467, ok djm@.
+    On some very old platforms, sys/stat.h needs sys/types.h, however
+    autoconf 2.71's AC_CHECK_INCLUDES_DEFAULT checks for them in the
+    opposite order, which in combination with modern autoconf's
+    "present but cannot be compiled" behaviour causes it to not be
+    detected.
 
-commit 9385d277b787403be9dfcb229cf372202496d2f3
+commit 8926956f22639132a9f2433fcd25224e01b900f5
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Aug 4 18:55:48 2022 +1000
+Date:   Fri Nov 11 11:25:37 2022 +1100
 
-    Include CHANNEL and FIDO2 libs in configure output
+    Add dfly62 test target.
 
-commit 141535b904b6fba01724444f38193a8599201f82
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Aug 1 11:09:26 2022 +0000
+commit 650de7ecd3567b5a5dbf16dd1eb598bd8c20bca8
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Nov 10 23:03:10 2022 +0000
 
-    upstream: avoid double-free in error path introduced in r1.70; report
+    upstream: Handle dynamic remote port forwarding in escape commandline's
     
-    and fix based on GHPR#332 by v-rzh ok dtucker@
+    -R processing. bz#3499, ok djm@
     
-    OpenBSD-Commit-ID: 3d21aa127b1f37cfc5bdc21461db369a663a951f
+    OpenBSD-Commit-ID: 194ee4cfe7ed0e2b8ad0727f493c798a50454208
 
-commit dba7099ffcba3ca07b3946f017ba6a4c3158d9b1
+commit 5372db7e7985ba2c00f20fdff8942145ca99e033
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jul 27 18:40:12 2022 +1000
+Date:   Thu Nov 10 12:44:51 2022 +1100
 
-    Remove deprecated MacOS 10.15 runners.
+    Remove seed passing over reexec.
+    
+    This was added for the benefit of platforms using ssh-rand-helper to
+    prevent a delay on each connection as sshd reseeded itself.
+    
+    ssh-random-helper is long gone, and since the re-exec happens before the
+    chroot the re-execed sshd can reseed itself normally. ok djm@
 
-commit 722a56439aa5972c830e4a9a724cf52aff4a950a
+commit ca98d3f8c64cfc51af81e1b01c36a919d5947ec2
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jul 27 18:31:14 2022 +1000
+Date:   Wed Nov 9 20:59:20 2022 +1100
 
-    Move stale-configure check as early as possible.
+    Skip reexec test on OpenSSL 1.1.1 specifically.
     
-    We added a check in Makefile to catch the case where configure needs to
-    be rebuilt, however this did not happen until a build was attempted in
-    which case all of the work done by configure was wasted.  Move this check
-     to the start of configure to catch it as early as possible.  ok djm@
+    OpenSSL 1.1.1 has a bug in its RNG that breaks reexec fallback, so skip
+    that test.  See bz#3483 for details.
 
-commit 099d6b56288b421ba38531d26dc1bd6bb685e311
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 22 10:47:19 2022 +1000
+commit 5ec4ebc2548e5f7f1b55b2a5cef5b67bdca8146f
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Nov 9 09:04:12 2022 +0000
 
-    Move libcrypto into CHANNELLIBS.
+    upstream: Fix typo in fatal error message.
     
-    This will result in sftp, sftp-server and scp no longer being linked
-    against libcrypto.  ok djm@
+    Patch from vapier at chromium.org.
+    
+    OpenBSD-Commit-ID: 8a0c164a6a25eef0eedfc30df95bfa27644e35cf
 
-commit 1bdf86725b77733bb5f17c54888b88a10b2f6538
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 22 10:45:47 2022 +1000
+commit e6abafe9a6d809422d3432b95b3f9747b0acaa71
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Nov 9 09:01:52 2022 +0000
 
-    Remove seed_rng calls from scp, sftp, sftp-server.
+    upstream: Remove errant colon and simplify format
     
-    These binaries don't use OpenSSL's random functions.  The next step
-    will be to stop linking them against libcrypto.  ok djm@
+    string in error messages. Patch from vapier at chromium.org.
+    
+    OpenBSD-Commit-ID: fc28466ebc7b74e0072331947a89bdd239c160d3
 
-commit d73f77b8cb9b422f1ac4facee7890aa10ff2bc21
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 22 09:51:51 2022 +1000
+commit db2027a687516f87c3fb141e87154bb3d8a7807c
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Nov 9 01:37:44 2022 +0000
 
-    Group libcrypto and PRNGD checks together.
+    upstream: rename client_global_hostkeys_private_confirm() to
     
-    They're related more than the libcrypt or libiaf checks which are
-    currently between them.  ok djm@
+    client_global_hostkeys_prove_confirm(), as it handles the
+    "hostkeys-prove00@openssh.com" message; no functional change
+    
+    OpenBSD-Commit-ID: 31e09bd3cca6eed26855b88fb8beed18e9bd026d
 
-commit f117e372b3f42f2fbdb0a578d063b2609ab58e1f
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 22 09:24:45 2022 +1000
+commit 1c2be7c2004cf1abcd172fee9fe3eab57cd4c426
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Nov 9 00:15:59 2022 +0000
 
-    Do not link scp, sftp and sftp-server w/ zlib.
+    upstream: typo in comment
     
-    Some of our binaries (eg sftp, sftp-server, scp) do not interact with
-    the channels code and thus do use libraries such as zlib and libcrypto
-    although they are linked with them.  This adds a CHANNELLIBS and starts
-    by moving zlib into it, which means the aformentioned binaries are no
-    longer linked against zlib.  ok djm@
+    OpenBSD-Commit-ID: 39c58f41e0f32d1ff31731fa6f5bbbc3ad25084a
 
-commit 800c2483e68db38bd1566ff69677124be974aceb
+commit cf1a9852d7fc93e4abc4168aed09529a57427cdc
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Jul 25 21:49:04 2022 +1000
+Date:   Wed Nov 9 09:23:47 2022 +1100
 
-    Remove workarounds for OpenSSL missing AES-CTR.
+    Defer seed_rng until after closefrom call.
     
-    We have some compatibility hacks that were added to support OpenSSL
-    versions that do not support AES CTR mode.  Since that time, however,
-    the minimum OpenSSL version that we support has moved to 1.0.1 which
-    *does* have CTR, so this is no longer needed.  ok djm@
+    seed_rng will initialize OpenSSL, and some engine providers (eg Intel's
+    QAT) will open descriptors for their own use.  bz#3483, patch from
+    joel.d.schuetze at intel.com, ok djm@
 
-commit b7c56b65c12f51fe0dbae798d19c8f58224a5d95
+commit dffa64480163fbf76af7e4fb62c26bb0dd6642aa
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Jul 25 21:43:00 2022 +1000
+Date:   Wed Nov 9 08:27:47 2022 +1100
 
-    Remove workarounds for OpenSSL missing AES-GCM.
-    
-    We have some compatibility hacks that were added to support OpenSSL
-    versions that do not support AES GCM mode.  Since that time, however,
-    the minimum OpenSSL version that we support has moved to 1.0.1 which
-    *does* have GCM, so this is no longer needed.  ok djm@
+    Fix comment text.  From emaste at freebsd.org.
 
-commit 5a4a9f7a968fbf92cc1eac519c65638e79ae9f1f
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Jul 25 07:12:45 2022 +0000
+commit d9df5689c29823ab830ec4f54c83c6cc3c0077ad
+Author: Pierre Ossman <ossman@cendio.se>
+Date:   Wed Jul 6 13:52:10 2022 +0200
 
-    upstream: Restore missing "!" in TEST_SSH_ELAPSED_TIMES test.
+    Avoid assuming layout of fd_set
     
-    OpenBSD-Regress-ID: 38783f9676ec348c5a792caecee9a16e354b37b0
+    POSIX doesn't specify the internal layout of the fd_set object, so let's
+    not assume it is just a bit mask. This increases compatibility with
+    systems that have a different layout.
+    
+    The assumption is also worthless as we already refuse to use file
+    descriptors over FD_SETSIZE anyway. Meaning that the default size of
+    fd_set is quite sufficient.
 
-commit 0ff886be132299386cc29d87c2aa16ff68a1aa08
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Jul 24 23:29:10 2022 +0000
+commit 419aa8a312e8d8f491933ca3d5933e602cb05aae
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 8 12:42:52 2022 +1100
 
-    upstream: Test TEST_SSH_ELAPSED_TIMES for empty string not
-    
-    executable.  No-op on most platforms but should prevent warnings in -portable
-    on systems that don't have 'date %s'.
+    Shutdown any VM before trying to check out repo.
     
-    OpenBSD-Regress-ID: e39d79867b8065e33d0c5926fa1a31f85659d2a4
+    In the case where the previous run did not clean up, the checkout will
+    fail as it'll leave a stale mount.
 
-commit f69319ad8ad1dd50f90bbcf5912e11cc8ed3e037
+commit a32c07cbb78f65d8527642b96474a83b413f8108
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jul 23 14:38:22 2022 +1000
+Date:   Tue Nov 8 11:33:25 2022 +1100
 
-    Convert "have_prog" function into "which".
+    Run vm startup and shutdown from runner temp dir.
     
-    "which" and its behaviour is not standardized, so convert the existing
-    have_prog function into "which" so we can rely on it being available
-    and what its semantics are.  Add a have_prog wrapper that maintains the
-    existing behaviour.
+    Should work even if the github workspace dir is on a stale sshfs mount.
 
-commit ea7ecc2c3ae39fdf5c6ad97b7bc0b47a98847f43
+commit 2b40a7dfcdb8e616155b9504145aa52b271455aa
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jul 23 14:36:38 2022 +1000
+Date:   Tue Nov 8 11:03:31 2022 +1100
 
-    Skip scp3 test if there's no scp on remote path.
+    Add valrind-5 test here too.
+
+commit 2ea03d1f6d0a05ee2b63ed2dc0f2d54f1e4655a1
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 8 09:21:10 2022 +1100
+
+    Update checkout and upload actions.
     
-    scp -3 ends up using the scp that's in the remote path and will fail if
-    one is not available.  Based on a patch from rapier at psc.edu.
+    Update actions/checkout and actions/upload-artifact to main branch for
+    compatibility with node.js v16.
 
-commit c46f6fed419167c1671e4227459e108036c760f8
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jul 20 13:39:14 2022 +1000
+commit 4e316ff0f18a118232bb9ac6512ee62773a9e8ea
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Nov 8 09:17:04 2022 +1100
 
-    crank SSH_SK_VERSION_MAJOR in sk-dummy.so
+    Split out rekey test since it runs the longest.
 
-commit f208e3b9ffb5ee76cf9c95df7ff967adc7f51c7d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 20 03:33:22 2022 +0000
+commit 21625a6424258a92a96a3bb73ae6aabc5ed8a6b4
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Nov 7 10:09:28 2022 +0000
 
-    upstream: ssh-keygen: fix touch prompt, pin retries;
+    upstream: The IdentityFile option in ssh_config can also be used to
     
-    part of GHPR329 from Pedro Martelletto
+    specify a public key file, as documented in ssh.1 for the -i option. Document
+    this also for IdentityFile in ssh_config.5, for documentation completeness.
+    From laalsaas at systemli.org via portable github PR#352, ok jmc@ djm@
     
-    OpenBSD-Commit-ID: 75d1005bd2ef8f29fa834c90d2684e73556fffe8
+    OpenBSD-Commit-ID: 2f943be9f96e60ef81a9a4faa25b009999f9883b
 
-commit 8638a2ce7e90c8a51d9af3143404282126c524f8
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 20 03:31:42 2022 +0000
+commit 747691604d3325ed2b62bad85b6fd8563ad32f6c
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Nov 7 10:05:38 2022 +0000
 
-    upstream: sk-usbhid: preserve error code returned by key_lookup()
+    upstream: Remove some set but otherwise unused variables, spotted
     
-    it conveys useful information, such as the supplied pin being wrong.
+    in -portable by clang 16's -Wunused-but-set-variable.  ok djm@
     
-    Part of GHPR329 from Pedro Martelletto
+    OpenBSD-Commit-ID: 3d943ddf2369b38fbf89f5f19728e7dc1daf3982
+
+commit 1d78d25653805aefc7a8dd9d86cd7359ada3823c
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Nov 7 10:02:59 2022 +0000
+
+    upstream: Check for and disallow MaxStartups values less than or
     
-    OpenBSD-Commit-ID: c0647eb9290f793add363d81378439b273756c1b
+    equal to zero during config parsing, rather than faling later at runtime.
+    bz#3489, ok djm@
+    
+    OpenBSD-Commit-ID: d79c2b7a8601eb9be493629a91245d761154308b
 
-commit 9ab929ca2d820520327b41929372bcb9e261534c
+commit a00f59a645072e5f5a8d207af15916a7b23e2642
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 20 03:29:14 2022 +0000
+Date:   Mon Nov 7 04:04:40 2022 +0000
 
-    upstream: when enrolling a resident key on a security token, check
-    
-    if a credential with matching application and user ID strings already exists.
-    if so, prompt the user for confirmation before overwriting the credential.
+    upstream: fix parsing of hex cert expiry time; was checking whether the
     
-    patch from Pedro Martelletto via GHPR329
+    start time began with "0x", not the expiry time.
     
-    NB. cranks SSH_SK_VERSION_MAJOR, so any third-party FIDO middleware
-    implementations will need to adjust
+    from Ed Maste
     
-    OpenBSD-Commit-ID: e45e9f1bf2b2f32d9850669e7a8dbd64acc5fca4
+    OpenBSD-Commit-ID: 6269242c3e1a130b47c92cfca4d661df15f05739
 
-commit 5bcfc788b38d5b64e4c347bdc04bd9a01bbc36da
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jul 20 03:13:04 2022 +0000
+commit f58acaf8c7315483f4ac87d46a1aa2142a713cd8
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Nov 7 15:10:59 2022 +1100
 
-    upstream: pull passphrase reading and confirmation into a separate
-    
-    function so it can be used for FIDO2 PINs; no functional change
-    
-    OpenBSD-Commit-ID: bf34f76b8283cc1d3f54633e0d4f13613d87bb2f
+    Fix merge conflict.
 
-commit eb679e2959bdb15454eb94751930eb4c9110da94
+commit 162e5741020a8d996c0c12b988b118e71ed728e6
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 15 21:31:48 2022 +1000
+Date:   Mon Nov 7 15:04:33 2022 +1100
 
-    Move vmshutdown to first step.
-    
-    If a previous run on a physical runner has failed to clean up, the next
-    run will fail because it'll try to check out the code to a broken
-    directory mount.  Make cleanup the first step.
+    Branch-specific links for master status badges.
 
-commit 46b91b70ff3cb9c147e2875ef5dc609fd64c0c96
+commit e4b7c12ab24579312aa3ed38ce7041a439ec2d56
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 15 20:25:27 2022 +1000
+Date:   Mon Nov 7 14:46:38 2022 +1100
 
-    Rename bbone test target to ARM.
+    Add CIFuzz status badge.
 
-commit 751d22cdeffed9fe921db78eedc32a29f9e80510
+commit b496b9f831acd1e5bcd875e26e797488beef494a
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 15 13:37:29 2022 +1000
+Date:   Mon Nov 7 14:45:16 2022 +1100
 
-    Add AUDIT_ARCH_PPC to supported seccomp arches.
+    Do not run CIFuzz on selfhosted tree.
     
-    Patch from dries.deschout at dodeco.eu.
+    We already run it on the regular tree, no need to double up.
 
-commit a061792a6e8d235fc40a9b5d4c22a1762bb75a7b
+commit 2138b1c4ddb300129a41a5104627b0d561184c7b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 14 19:20:24 2022 +1000
+Date:   Mon Nov 7 14:41:58 2022 +1100
 
-    Remove unintended changes.
-    
-    I inadvertently included a couple of local changes with the OpenSSL
-    3.0.4 change.  Revert, anything that should be there will be committed
-    separately.
+    Whitespace change to trigger CIFuzz workflow.
 
-commit 527cb43fa1b4e55df661feabbac51b8e608b6519
+commit 4670b97ef87c7b0f21283c9b07c7191be88dda05
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 14 11:22:08 2022 +1000
+Date:   Mon Nov 7 14:34:04 2022 +1100
 
-    Return ERANGE from getcwd() if buffer size is 1.
+    Run cifuzz workflow on the actions as regular CI.
+
+commit 79391e66ce851ace1baf3c6a35e83a23f08ec2ba
+Author: David Korczynski <david@adalogics.com>
+Date:   Tue Nov 30 11:45:20 2021 +0000
+
+    Add CIFuzz integration
+
+commit c1893364a0be243270014d7d34362a8101d55112
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Nov 7 02:21:22 2022 +0000
+
+    upstream: Import regenerated moduli.
     
-    If getcwd() is supplied a buffer size of exactly 1 and a path of "/", it
-    could result in a nul byte being written out of array bounds.  POSIX says
-    it should return ERANGE if the path will not fit in the available buffer
-    (with terminating nul). 1 byte cannot fit any possible path with its nul,
-    so immediately return ERANGE in that case.
+    OpenBSD-Commit-ID: b0e54ee4d703bd6929bbc624068666a7a42ecb1f
+
+commit 5c3f18fb994ef27e685b205ee2351851b80fdbd1
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Nov 7 01:53:01 2022 +0000
+
+    upstream: Fix typo. From pablomh via -portable github PR#344.
     
-    OpenSSH never uses getcwd() with this buffer size, and all current
-    (and even quite old) platforms that we are currently known to work
-    on have a native getcwd() so this code is not used on those anyway.
-    Reported by Qualys, ok djm@
+    OpenBSD-Commit-ID: d056ee2e73691dc3ecdb44a6de68e6b88cd93827
 
-commit 36857fefd8849c4b0e877cfd9d1eb22f79b76650
+commit e1c6fcc142066417c9832e634463faa3dd5d116c
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 14 10:02:35 2022 +1000
+Date:   Mon Nov 7 12:46:58 2022 +1100
 
-    Split README.platform into its own line.
+    Link to branch-specific queries for V_9_1 status.
+
+commit 4f4a5fad6d8892c3f8ee9cd81ec7de6458210c9f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sun Nov 6 10:55:59 2022 +1100
+
+    Use "prohibit-password" in -portable comments.
     
-    README.platform has general platform-specific information, having it
-    following text about FIDO2 on the same line could imply that it only
-    has information about FIDO2.
+    "without-password" is the deprecated alias for "prohibit-password",
+    so we should reference the latter. From emaste at freebsd.org.
 
-commit 00a496c6c14f2d41f2a9365714d494dd5f3aac9f
+commit 0f7e1eba55259ec037f515000b4c4afbf446230a
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jul 14 09:56:01 2022 +1000
+Date:   Sun Nov 6 10:50:01 2022 +1100
 
-    Clarify README.md text.
+    Fix tracing disable on FreeBSD.
     
-    Clarify the text about the implications of building without OpenSSL, and
-    prefix the "configure --help" example command with a "./" so it's likely
-    to work as-is in more shells.  From bz#3461.
+    Some versions of FreeBSD do not support using id 0 to refer to the
+    current pid for procctl, so pass getpid() explicitly.  From
+    emaste at freebsd.org.
 
-commit f40b52f21fbc52eb513279168a49d3285c65256c
+commit 32fddb982fd61b11a2f218a115975a87ab126d43
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 12 19:48:44 2022 +1000
+Date:   Mon Nov 7 10:39:01 2022 +1100
 
-    Remove special casing of crypt().
+    Fix setres*id checks to work with clang-16.
     
-    Configure goes to some lengths to pick crypt() from either libcrypt
-    or OpenSSL's libcrypto because they can more or less featureful (eg
-    supporting md5-style passwords).
+    glibc has the prototypes for setresuid and setresgid behind _GNU_SOURCE,
+    and clang 16 will error out on implicit function definitions, so add
+    _GNU_SOURCE and the required headers to the configure checks.  From
+    sam at @gentoo.org via bz#3497.
+
+commit 12af712d116f42164bcfa56db901d06e4fa27199
+Author: Sam James <sam@gentoo.org>
+Date:   Sun Nov 6 04:52:38 2022 +0000
+
+    configure.ac: Fix -Wstrict-prototypes
     
-    OpenSSL removed its crypt() interface in 2002:
-    https://github.com/openssl/openssl/commit/69deec58 so these hijinks
-    should no longer be necessary.  This also only links sshd with libcrypt
-    which is the only thing that needs it.  ok djm@
+    Clang 16 now warns on this and it'll be removed in C23, so let's
+    just be future proof. It also reduces noise when doing general
+    Clang 16 porting work (which is a big job as it is).  github PR#355.
+    
+    Signed-off-by: Sam James <sam@gentoo.org>
 
-commit 76f4e48631d7b09fb243b47d7b393d100d3741b7
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jul 13 13:17:47 2022 +1000
+commit 40b0a5eb6e3edfa2886b60c09c7803353b0cc7f5
+Author: Sam James <sam@gentoo.org>
+Date:   Sun Nov 6 04:47:35 2022 +0000
 
-    Only refuse to use OpenSSL 3.0.4 on x86_64.
+    configure.ac: Add <pty.h> include for openpty
     
-    The potential RCE only impacts x86_64, so only refuse to use it if we're
-    targetting a potentially impacted architecture.  ok djm@
+    Another Clang 16ish fix (which makes -Wimplicit-function-declaration
+    an error by default).  github PR#355.
+    
+    See: 2efd71da49b9cfeab7987058cf5919e473ff466b
+    See: be197635329feb839865fdc738e34e24afd1fca8
 
-commit e75bbc1d88491fa85e61b2cc8783d4bbd00cd131
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 12 14:37:15 2022 +1000
+commit 6b17e128879ec6cc32ca2c28b5d894b4aa72e32d
+Author: Rochdi Nassah <rochdinassah.1998@gmail.com>
+Date:   Fri Oct 28 01:26:31 2022 +0100
 
-    Capture stderr output from configure.
+    Fix broken zlib link.
 
-commit d9eaea4bea6271bcee6a2b9428f1271faf2d033b
+commit 99500df246ccb736ddbdd04160dcc82165d81a77
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 12 12:54:49 2022 +1000
+Date:   Fri Nov 4 16:59:26 2022 +1100
 
-    Refuse to use OpenSSL 3.0.4 due to potential RCE.
+    Don't run openbsd-compat tests on Cygwin.
     
-    OpenSSL has a potential RCE in its RSA implementation (CVE-2022-2274)
-    so refuse to use that specific version.
+    Add "compat-tests" to the default TEST_TARGET so we can override as
+    necessary.  Override TEST_TARGET for Cygwin as the tests don't currently
+    compile there.
 
-commit fb2f3a61bf3d28fff285524535f7ffcd177c9235
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 12 12:54:24 2022 +1000
+commit 3cae9f92a31897409666aa1e6f696f779759332b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Nov 3 21:59:20 2022 +0000
 
-    Move unset to before we set anything.
+    upstream: replace recently-added valid_domain() check for hostnames
+    
+    going to known_hosts with a more relaxed check for bad characters; previous
+    commit broke address literals. Reported by/feedback from florian@
+    
+    OpenBSD-Commit-ID: 10b86dc6a4b206adaa0c11b58b6d5933898d43e0
 
-commit c483a5c0fb8e8b8915fad85c5f6113386a4341ca
+commit 9655217231c9056200bea7ae2dffcc9c0c3eb265
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jul 6 11:52:54 2022 +1000
+Date:   Thu Nov 3 23:07:50 2022 +1100
 
-    Test against openssl-3.0.5.
+    Rerun tests on changes to Makefile.in in any dir.
 
-commit 669a56bcfe73f8b985f2bba476ba834d55253acf
+commit 3500f0405a3ab16b59a26f3508c4257a3fc3bce6
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 5 18:35:53 2022 +1000
+Date:   Thu Nov 3 23:04:08 2022 +1100
 
-    Update sanitizer test targets:
+    Link libssh into compat tests.
     
-     - remove clang-sanitize-memory for now.  It takes so long that the test
-       times out.
-     - add gcc sanitize-address and sanitize-undefined test targets.
+    The cygwin compat code uses xmalloc, so add libssh.a so pick up that.
 
-commit 48cc68b69118b3ce8d07fd4f82e00d58667d5379
+commit ec59effcf65b8a4c85d47ff5a271123259dd0ab8
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 5 16:23:28 2022 +1000
+Date:   Thu Nov 3 21:44:23 2022 +1100
 
-    Add GCC address sanitizer build/test.
+    Fix compat regress to work with non-GNU make.
 
-commit 55c60bdd39b82457e92efa77da8d16cfa6a49391
+commit 73550a218e7dfbbd599534cbf856309bc924f6fd
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jul 5 12:02:33 2022 +1000
-
-    Move sanitizer logs into regress for collection.
-
-commit 35ef2b3b6ef198f8574904a45780487ec2f17858
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon Jul 4 09:10:31 2022 +0000
+Date:   Thu Nov 3 13:41:16 2022 +1100
 
-    upstream: Add TEST_REGRESS_CACHE_DIR.
-    
-    If set, it is used to cache regress test names that have succeeded and
-    skip those on a re-run.
+    Increase selfhosted job timeout.
     
-    OpenBSD-Regress-ID: a7570dd29a58df59f2cca647c3c2ec989b49f247
+    The default job timeout of 360 (6h) is not enough to complete the
+    regress tests for some of the slow VMs depending on the load on the host.
+    Increase to 600 (10h).
 
-commit 7394ed80c4de8b228a43c8956cf2fa1b9c6b2622
+commit db97d8d0b90c6ce52b94b153d6f8f5f7d3b11777
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Jul 3 21:46:44 2022 +1000
+Date:   Thu Nov 3 10:00:43 2022 +1100
 
-    Add clang sanitizer tests.
+    Only run opensslver tests if built with OpenSSL.
 
-commit bfce0e66b6017a9bfab450b9dc7d4b16f90de817
+commit ba053709638dff2f6603df0c1f340352261d63ea
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Jul 3 18:14:09 2022 +1000
+Date:   Wed Nov 2 14:16:04 2022 +1100
 
-    Skip all rlimit tests when sandboxing disabled.
-    
-    The rlimit tests can hang when being run with some compiler sanitizers
-    so skip all of them if sandbox=no.
+    Add tests for OpenSSL 3.0.7 and LibreSSL 3.6.1.
 
-commit 6208d611520f9ea94d5369f9da404b709930029d
+commit edd24101c7e17d1a8f6576e1aaf62233b47ad6f5
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Jul 3 17:54:49 2022 +1000
-
-    Move checks for pollfd.fd and nfds_t.
-    
-    Move the checks for struct pollfd.fd and nfds_t to before the sandboxing
-    checks.  This groups all the sandbox checks together so we can skip them
-    all when sandboxing is disabled.
+Date:   Thu Nov 3 08:17:39 2022 +1100
 
-commit 322964f8f2e9c321e77ebae1e4d2cd0ccc5c5a0b
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jul 1 05:08:23 2022 +0000
+    Run compat regress tests too.
 
-    upstream: Remove leftover line.
-    
-    Remove extra line leftover from merge conflict. ok djm@
+commit fe88d67e7599b0bc73f6e4524add28d743e7f977
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Nov 3 08:14:05 2022 +1100
+
+    Compat tests need libcrypto.
     
-    OpenBSD-Commit-ID: 460e2290875d7ae64971a7e669c244b1d1c0ae2e
+    This was moved to CHANNELLIBS during the libs refactor.  Spotted by
+    rapier at psc.edu.
 
-commit 7ec81daad0e03a64e8d91c5590960c48c1a899a3
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jul 1 04:45:50 2022 +0000
+commit 96b519726b7944eee3c23a54eee3d5c031ba1533
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Nov 3 04:24:39 2022 +1100
 
-    upstream: use consistent field names (s/char/byte)
-    
-    in format description
+    Include time.h when defining timegm.
     
-    OpenBSD-Commit-ID: 3de33572733ee7fcfd7db33d37db23d2280254f0
+    Fixes build on some platforms eg recent AIX.
 
-commit 32e82a392d9f263485effdd606ff5862d289a4a0
+commit da6038bd5cd55eb212eb2aec1fc8ae79bbf76156
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jul 1 13:55:19 2022 +1000
+Date:   Tue Nov 1 19:10:30 2022 +1100
 
-    Skip select+rlimit check if sandboxing is disabled
+    Always use compat getentropy.
     
-    It's not needed in that case, and the test can fail when being built
-    with some compiler memory sanitizer flags.  bz#3441
+    Have it call native getentropy and fall back as required.  Should fix
+    issues of platforms where libc has getentropy but it is not implemented
+    in the kernel.  Based on github PR#354 from simsergey.
 
-commit 4be7184ebe2a2ccef175983517a35ee06766e1b4
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jul 1 03:52:57 2022 +0000
+commit 5ebe18cab6be3247b44c807ac145164010465b82
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Nov 2 10:51:48 2022 +1100
 
-    upstream: bump up loglevel from debug to info when unable to open
-    
-    authorized keys/principals file for errno != ENOENT; bz2042 ok dtucker
+    Check for sockaddr_in.sin_len.
     
-    OpenBSD-Commit-ID: e79aa550d91ade6a80f081bda689da24c086d66b
+    If found, set SOCK_HAS_LEN which is used in addr.c.  Should fix keyscan
+    tests on platforms with this (eg old NetBSD).
 
-commit 6c31ba10e97b6953c4f325f526f3e846dfea647a
+commit a1febadf426536612c2734168d409147c392e7cf
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jul 1 03:39:44 2022 +0000
+Date:   Sun Oct 30 18:42:07 2022 +0000
 
-    upstream: Don't leak the strings allocated by order_hostkeyalgs()
-    
-    and list_hostkey_types() that are passed to compat_pkalg_proposal(). Part of
-    github PR#324 from ZoltanFridrich, ok djm@
+    upstream: Use variable for diff options
     
-    This is a roll-forward of the previous rollback now that the required
-    changes in compat.c have been done.
+    instead of unconditionally specifying "-rN". This will make life easier
+    in -portable where not all diff's understand -N.
     
-    OpenBSD-Commit-ID: c7cd93730b3b9f53cdad3ae32462922834ef73eb
+    OpenBSD-Regress-ID: 8b8a407115546be1c6d72d350b1e4f1f960d3cd3
 
-commit 486c4dc3b83b4b67d663fb0fa62bc24138ec3946
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jul 1 03:35:45 2022 +0000
+commit f6d3ed9a8a9280cbb68d6a499850cfe810e92bd0
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Oct 31 05:13:02 2022 +1100
 
-    upstream: Always return allocated strings from the kex filtering so
-    
-    that we can free them later.  Fix one leak in compat_kex_proposal.  Based on
-    github PR#324 from ZoltanFridrich with some simplications by me. ok djm@
+    OpenSSL dev branch is 302 not 320.
     
-    OpenBSD-Commit-ID: 9171616da3307612d0ede086fd511142f91246e4
+    While there, also accept 301 which it shat it was previously.
 
-commit 96faa0de6c673a2ce84736eba37fc9fb723d9e5c
+commit 25c8a2bbcc10c493d27faea57c42a6bf13fa51f2
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jul 1 00:36:30 2022 +0000
+Date:   Fri Oct 28 02:47:04 2022 +0000
 
-    upstream: ignore SIGPIPE earlier in main(), specifically before
+    upstream: put sshkey_check_rsa_length() back in sshkey.c to unbreak
     
-    muxclient() which performs operations that could cause one; Reported by Noam
-    Lewis via bz3454, ok dtucker@
+    OPENSSL=no builds
     
-    OpenBSD-Commit-ID: 63d8e13276869eebac6d7a05d5a96307f9026e47
+    OpenBSD-Commit-ID: 99eec58abe382ecd14b14043b195ee1babb9cf6e
 
-commit 33efac790f6b09d54894ba6c3e17dfb08b6fc7e1
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Tue Jun 28 06:09:14 2022 +0000
+commit 1192588546c29ceec10775125f396555ea71850f
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 02:29:34 2022 +0000
 
-    upstream: reflect the update to -D arg name in usage();
+    upstream: allow ssh-keyscan(1) to accept CIDR address ranges, e.g.
     
-    OpenBSD-Commit-ID: abdcde4f92b1ef094ae44210ee99d3b0155aad9c
+    ssh-keyscan 192.168.0.0/24
+    
+    If a CIDR range is passed, then it will be expanded to all possible
+    addresses in the range including the all-0s and all-1s addresses.
+    
+    bz#976 feedback/ok markus@
+    
+    OpenBSD-Commit-ID: ce6c5211f936ac0053fd4a2ddb415277931e6c4b
 
-commit c71a1442d02f0a3586109dfe2cb366de36dee08e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jun 29 18:28:47 2022 +1000
+commit 64af4209309461c79c39eda2d13f9d77816c6398
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Oct 28 12:54:35 2022 +1100
 
-    Update OpenSSL tests to the most recent releases.
+    fix merge botch
 
-commit 2a822f29300b2de7335fbff65f0b187a0c582304
+commit 27267642699342412964aa785b98afd69d952c88
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jun 27 21:41:55 2022 +0000
+Date:   Fri Oct 28 00:44:44 2022 +0000
 
-    upstream: allow arguments to sftp -D option, e.g. sftp -D
-    
-    "/usr/libexec/sftp-server -el debug3"
+    upstream: refactor sshkey_private_deserialize
     
-    ok markus@
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: 5a002b9f3a7aef2731fc0ffa9c921cf15f38ecce
+    OpenBSD-Commit-ID: f5ca6932fdaf840a5e8250becb38315a29b5fc9f
 
-commit 2369a2810187e08f2af5d58b343956062fb96ee8
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 24 10:45:06 2022 +0000
+commit 2519a7077a9332f70935e5242ba91ee670ed6b87
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:44:17 2022 +0000
 
-    upstream: Roll back previous KEX changes as they aren't safe until
+    upstream: refactor sshkey_private_serialize_opt()
     
-    compat_pkalg_proposal and friends always allocate their returned strings.
-    Reported by Qualys.
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: 1c7a88a0d5033f42f88ab9bec58ef1cf72c81ad0
+    OpenBSD-Commit-ID: 61e0fe989897901294efe7c3b6d670cefaf44cbd
 
-commit 646686136c34c2dbf6a01296dfaa9ebee029386d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 24 04:37:00 2022 +0000
+commit 11a768adf98371fe4e43f3b06014024c033385d5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:43:30 2022 +0000
 
-    upstream: Don't leak the strings allocated by order_hostkeyalgs()
+    upstream: refactor certify
     
-    and list_hostkey_types() that are passed to compat_pkalg_proposal(). Part of
-    github PR#324 from ZoltanFridrich, ok djm@
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: b2f6e5f60f2bba293b831654328a8a0035ef4a1b
+    OpenBSD-Commit-ID: 35d742992e223eaca3537e6fb3d3002c08eed4f6
 
-commit 193c6d8d905dde836b628fc07a7b9cf2d347e2a3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jun 25 12:16:15 2022 +1000
+commit 3fbc58bb249d967cc43ebdc554f6781bb73d4a58
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:43:08 2022 +0000
 
-    Zero out LIBFIDO2 when SK support not usable.
+    upstream: refactor sshkey_sign() and sshkey_verify()
     
-    Prevents us from trying to link them into ssh-sk-helper and failing to
-    build.
-
-commit 40f5d849d25c60b4ae21261e78484d435f5cfd51
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Jun 25 11:47:28 2022 +1000
-
-    Disable SK support if FIDO libs not found.
-
-commit 5fd922ade1b25880fe8a8249f5c0385e413108f9
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jun 24 14:43:54 2022 +1000
-
-    fix broken case statement in previous
-
-commit f51423bdaf0008d46b6af082bcfd7a22a87375f0
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jun 24 14:40:42 2022 +1000
-
-    request 1.1x API compatibility for OpenSSL >=3.x
+    feedback/ok markus@
     
-    idea/patch from Pedro Martelletto via GHPR#322; ok dtucker@
+    OpenBSD-Commit-ID: 368e662c128c99d05cc043b1308d2b6c71a4d3cc
 
-commit 455cee8d6c2e4c48c5af9faead3599c49948411e
+commit a1deb6cdbbe6afaab74ecb08fcb62db5739267be
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jun 24 04:27:14 2022 +0000
+Date:   Fri Oct 28 00:41:52 2022 +0000
 
-    upstream: make it clear that RekeyLimit applies to both transmitted
+    upstream: refactor sshkey_from_blob_internal()
     
-    and received data. GHPR#328 from Jan Pazdziora
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: d180a905fec9ff418a75c07bb96ea41c9308c3f9
+    OpenBSD-Commit-ID: 1f46c0cbb8060ee9666a02749594ad6658c8e283
 
-commit 17904f05802988d0bb9ed3c8d1d37411e8f459c3
-Author: tobhe@openbsd.org <tobhe@openbsd.org>
-Date:   Tue Jun 21 14:52:13 2022 +0000
+commit 7d00799c935271ce89300494c5677190779f6453
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:41:17 2022 +0000
 
-    upstream: Make sure not to fclose() the same fd twice in case of an
-    
-    error.
+    upstream: refactor sshkey_from_private()
     
-    ok dtucker@
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: e384c4e05d5521e7866b3d53ca59acd2a86eef99
+    OpenBSD-Commit-ID: e5dbe7a3545930c50f70ee75c867a1e08b382b53
 
-commit f29d6cf98c25bf044079032d22c1a57c63ab9d8e
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Jun 18 02:17:16 2022 +0000
+commit 262647c2e920492ca57f1b9320d74f4a0f6e482b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:39:29 2022 +0000
 
-    upstream: Don't attempt to fprintf a null identity comment. From
+    upstream: factor out key generation
     
-    Martin Vahlensieck via tech@.
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: 4c54d20a8e8e4e9912c38a7b4ef5bfc5ca2e05c2
+    OpenBSD-Commit-ID: 5b4211bff4de8d9adb84bc72857a8c42c44e7ceb
 
-commit ad1762173bb38716a106e8979806149fd0f2753e
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 17 01:00:03 2022 +0000
+commit 401c74e7dc15eab60540653d2f94d9306a927bab
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:38:58 2022 +0000
 
-    upstream: Log an error if pipe() fails while accepting a
+    upstream: refactor and simplify sshkey_read()
     
-    connection.  bz#3447, from vincent-openssh at vinc17 net, ok djm@
+    feedback/ok markus@
     
-    OpenBSD-Commit-ID: 9d59f19872b94900a5c79da2d57850241ac5df94
+    OpenBSD-Commit-ID: 0d93b7a56e31cd06a8bb0d2191d084ce254b0971
 
-commit 9c59e7486cc8691401228b43b96a3edbb06e0412
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jun 24 14:20:43 2022 +1000
+commit 591fed94e66a016acf87f4b7cd416ce812f2abe8
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:37:24 2022 +0000
 
-    automatically enable built-in FIDO support
+    upstream: factor out public key serialization
     
-    If libfido2 is found and usable, then enable the built-in
-    security key support unless --without-security-key-builtin
-    was requested.
+    feedback/ok markus@
     
-    ok dtucker@
+    OpenBSD-Commit-ID: a3570c4b97290c5662890aea7328d87f55939033
 
-commit 7d25b37fb2a5ff4dadabcbdac6087a97479434f5
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jun 24 13:46:39 2022 +1000
+commit 1e78844ae2b2dc01ba735d5ae740904c57e13685
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 28 00:36:31 2022 +0000
 
-    fix possible NULL deref when built without FIDO
+    upstream: factor out sshkey_equal_public()
     
-    Analysis/fix from kircher in bz3443; ok dtucker@
+    feedback/ok markus@
+    
+    OpenBSD-Commit-ID: 1368ba114cb37732fe6ec3d89c7e6d27ea6fdc94
 
-commit f5ba85daddfc2da6a8dab6038269e02c0695be44
+commit 25de1c01a8b9a2c8ab9b1da22444a03e89c982de
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jun 15 16:08:25 2022 +0000
+Date:   Fri Oct 28 00:35:40 2022 +0000
 
-    upstream: make sure that UseDNS hostname lookup happens in the monitor
+    upstream: begin big refactor of sshkey
+    
+    Move keytype data and some of the type-specific code (allocation,
+    cleanup, etc) out into each key type's implementation. Subsequent
+    commits will move more, with the goal of having each key-*.c file
+    owning as much of its keytype's implementation as possible.
     
-    and not in the pledge(2)'d unprivileged process; fixes regression caused by
-    recent refactoring spotted by henning@
+    lots of feedback + ok markus@
     
-    OpenBSD-Commit-ID: a089870b95101cd8881a2dff65b2f1627d13e88d
+    OpenBSD-Commit-ID: 0f2b4334f73914344e9e5b3d33522d41762a57ec
 
-commit acb2059febaddd71ee06c2ebf63dcf211d9ab9f2
+commit 445363433ba20b8a3e655b113858c836da46a1cb
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jun 3 04:47:21 2022 +0000
+Date:   Mon Oct 24 22:43:36 2022 +0000
 
-    upstream: move auth_openprincipals() and auth_openkeyfile() over to
+    upstream: Be more paranoid with host/domain names coming from the
     
-    auth2-pubkeyfile.c too; they make more sense there.
+    never write a name with bad characters to a known_hosts file.
     
-    OpenBSD-Commit-ID: 9970d99f900e1117fdaab13e9e910a621b7c60ee
+    reported by David Leadbeater, ok deraadt@
+    
+    OpenBSD-Commit-ID: ba9b25fa8b5490b49398471e0c9657b0cbc7a5ad
 
-commit 3d9b0845f34510111cc693bb99a667662ca50cd8
+commit 7190154de2c9fe135f0cc1ad349cb2fa45152b89
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jun 3 04:31:54 2022 +0000
+Date:   Mon Oct 24 21:52:50 2022 +0000
 
-    upstream: test setenv in both client and server, test first-match-wins
+    upstream: regress test for unmatched glob characters; fails before
     
-    too
+    previous commit but passes now. bz3488; prodded by dtucker@
     
-    OpenBSD-Regress-ID: 4c8804f9db38a02db480b9923317457b377fe34b
+    OpenBSD-Regress-ID: 0cc5cc9ea4a6fd170dc61b9212f15badaafb3bbd
 
-commit 22e1a3a71ad6d108ff0c5f07f93c3fcbd30f8b40
+commit a4821a592456c3add3cd325db433110cdaaa3e5c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jun 3 04:30:46 2022 +0000
+Date:   Mon Oct 24 21:51:55 2022 +0000
 
-    upstream: Make SetEnv directives first-match-wins in both
+    upstream: when scp(1) is using the SFTP protocol for transport (the
     
-    sshd_config and sshd_config; previously if the same name was reused then the
-    last would win (which is the opposite to how the config is supposed to work).
+    default), better match scp/rcp's handling of globs that don't match the
+    globbed characters but do match literally (e.g. trying to transfer
+    "foo.[1]").
     
-    While there, make the ssh_config parsing more like sshd_config.
+    Previously scp(1) in SFTP mode would not match these pathnames but
+    legacy scp/rcp mode would.
     
-    bz3438, ok dtucker
+    Reported by Michael Yagliyan in bz3488; ok dtucker@
     
-    OpenBSD-Commit-ID: 797909c1e0262c0d00e09280459d7ab00f18273b
+    OpenBSD-Commit-ID: d8a3773f53015ba811fddba7473769a2fd343e11
 
-commit 38ed6c57e9e592c08e020fa6e82b45b4e1040970
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 3 04:00:15 2022 +0000
+commit 18376847b8043ba967eabbe23692ef74c9a3fddc
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Thu Oct 13 09:09:28 2022 +0000
 
-    upstream: Add missing *-sk types to ssh-keyscan manpage. From
-    
-    skazi0 via github PR#294.
+    upstream: use correct type with sizeof ok djm@
     
-    OpenBSD-Commit-ID: fda2c869cdb871f3c90a89fb3f985370bb5d25c0
+    OpenBSD-Commit-ID: d6c882c2e8a42ff831a5b3cbc2c961ecb2dd6143
 
-commit ea97ec98c41ec2b755dfab459347db674ff9a5de
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 3 03:21:09 2022 +0000
+commit 4a4883664d6b4e9e4e459a8cdc16bd8d4b735de9
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Fri Oct 7 06:00:58 2022 +0000
 
-    upstream: Add period at end of "not known by any other names"
+    upstream: ssh-agent.1: - use Nm not Xr for self-ref - while here,
     
-    message.  github PR#320 from jschauma, ok djm@
+    wrap a long line
     
-    OpenBSD-Commit-ID: bd60809803c4bfd3ebb7c5c4d918b10e275266f2
+    ssh-agent.c:
+    - add -O to usage()
+    
+    OpenBSD-Commit-ID: 855dac4695cef22e96d69c53436496bc408ca389
 
-commit 88e376fcd67478ad1660d94bc73ab348ac9f4527
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jun 3 03:17:42 2022 +0000
+commit 9fd2441113fce2a83fc7470968c3b27809cc7f10
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Oct 7 04:06:26 2022 +0000
 
-    upstream: ssh-keygen -A: do not generate DSA keys by default.
+    upstream: document "-O no-restrict-websafe"; spotted by Ross L
     
-    Based on github PR#303 from jsegitz with man page text from jmc@, ok markus@
-    djm@
+    Richardson
     
-    OpenBSD-Commit-ID: 5c4c57bdd7063ff03381cfb6696659dd3f9f5b9f
+    OpenBSD-Commit-ID: fe9eaa50237693a14ebe5b5614bf32a02145fe8b
 
-commit 6b3fb624675082a1e5aa615d1b8479873d8b5731
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Tue May 31 14:05:12 2022 +0000
+commit 614252b05d70f798a0929b1cd3d213030ad4d007
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Oct 18 06:29:16 2022 +1100
 
-    upstream: ssh-keygen: implement "verify-required" certificate option.
-    
-    This was already documented when support for user-verified FIDO
-    keys was added, but the ssh-keygen(1) code was missing.
+    OpenSSL dev branch now identifies as 3.2.0.
+
+commit 195e5a65fd793a738ea8451ebfdd1919db5aff3e
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Oct 17 09:41:47 2022 +1100
+
+    revert c64b62338b4 and guard POLL* defines instead
     
-    ok djm@
+    c64b62338b4 broke OSX builds, which do have poll.h but lack ppoll(2)
+    Spotted by dtucker
+
+commit bc2e480d99613bd59720edae244d1764636544c4
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Oct 14 14:52:22 2022 +1100
+
+    undef _get{short,long} before redefining
+
+commit 5eb796a369c64f18d55a6ae9b1fa9b35eea237fb
+Author: Harmen Stoppels <harmenstoppels@gmail.com>
+Date:   Thu Oct 13 16:08:46 2022 +0200
+
+    Fix snprintf configure test for clang 15
     
-    OpenBSD-Commit-ID: f660f973391b593fea4b7b25913c9a15c3eb8a06
+    Clang 15 -Wimplicit-int defaults to an error in C99 mode and above.
+    A handful of tests have "main(..." and not "int main(..." which caused
+    the tests to produce incorrect results.
 
-commit b7f86ffc301be105bba9a3e0618b6fab3ae379bd
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Sat May 28 05:57:56 2022 +0000
+commit c64b62338b46ffa08839f05f21ad69fa6234dc17
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Oct 10 12:32:43 2022 +1100
 
-    upstream: keywords ref ssh_config.5;
+    skip bsd-poll.h if poll.h found; ok dtucker
+
+commit 5ee2b8ccfcf4b606f450eb0ff2305e311f68b0be
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Oct 6 22:42:37 2022 +0000
+
+    upstream: honour user's umask if it is more restrictive then the ssh
     
-    from caspar schutijser
+    default (022); based on patch from Alex Henrie, ok dtucker@ deraadt@
     
-    OpenBSD-Commit-ID: f146a19d7d5c9374c3b9c520da43b2732d7d1a4e
+    OpenBSD-Commit-ID: fe1b9e15fc9a4f49fc338e848ce14d8727abe82d
 
-commit dc7bc52372f2744fa39191577be5306ee57aacd4
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon May 30 09:29:09 2022 +1000
+commit a75cffc2700cebd3e2dd9093f7f7388d2be95cb7
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Oct 7 03:54:56 2022 +1100
 
-    fix some bugs in the fuzzer
+    Add LibreSSL 3.6.0 to test suite.
+    
+    While there, bump OpenSSL to latest 1.1.1q release.
 
-commit 1781f507c113667613351c19898efaf1e311a865
+commit fcc0f0c0e96a30076683fea9a7c9eedc72931742
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri May 27 18:19:48 2022 +1000
+Date:   Thu Oct 6 21:18:16 2022 +1100
 
-    Test against OpenSSL 1.1.1o and 3.0.3.
+    Add 9.1 branch to CI status page.
 
-commit c53906e0c59e569691b4095d3e8db79cf78fa058
+commit ef211eee63821d894a8bf81f22bfba9f6899d0fe
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri May 27 18:18:31 2022 +1000
+Date:   Tue Oct 4 23:20:23 2022 +1100
 
-    Test against LibreSSL 3.5.3.
+    Test commits to all branches of portable.
+    
+    Only test OpenBSD upstream on commits to master since that's what it
+    tracks.
 
-commit 9b3ad432ad2f19319bcc089370e356c6315d682f
+commit fe646de03cafb6593ff4e4954bca9ec4b4b753a8
 Author: Damien Miller <djm@mindrot.org>
-Date:   Fri May 27 17:00:43 2022 +1000
+Date:   Wed Oct 5 03:47:26 2022 +1100
 
-    fuzzer for authorized_keys parsing
-    
-    mostly redundant to authopt_fuzz, but it's sensitive code so IMO it
-    makes sense to test this layer too
+    whitespace at EOL
 
-commit c83d8c4d6f3ccceef84d46de107f6b71cda06359
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri May 27 05:02:46 2022 +0000
+commit a6e1852d10c63a830196e82168dadd957aaf28ec
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Oct 5 03:40:01 2022 +1100
 
-    upstream: split the low-level file handling functions out from
-    
-    auth2-pubkey.c
-    
-    Put them in a new auth2-pubkeyfile.c to make it easier to refer to them
-    (e.g. in unit/fuzz tests) without having to refer to everything else
-    pubkey auth brings in.
-    
-    ok dtucker@
-    
-    OpenBSD-Commit-ID: 3fdca2c61ad97dc1b8d4a7346816f83dc4ce2217
+    mention libfido2 autodetection
 
-commit 3b0b142d2a0767d8cd838e2f3aefde8a0aaa41e1
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri May 27 05:01:25 2022 +0000
+commit 7360c2c206f33d309edbaf64036c96fadf74d640
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Oct 5 03:37:36 2022 +1100
 
-    upstream: refactor authorized_keys/principals handling
-    
-    remove "struct ssh *" from arguments - this was only used to pass the
-    remote host/address. These can be passed in instead and the resulting
-    code is less tightly coupled to ssh_api.[ch]
-    
-    ok dtucker@
+    remove mention of --with-security-key-builtin
     
-    OpenBSD-Commit-ID: 9d4373d013edc4cc4b5c21a599e1837ac31dda0d
+    it is enabled by default when libfido2 is installed
 
-commit 2c334fd36f80cb91cc42e4b978b10aa35e0df236
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri May 27 04:29:40 2022 +0000
+commit 0ffb46f2ee2ffcc4daf45ee679e484da8fcf338c
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Oct 4 01:51:42 2022 +1100
 
-    upstream: f sshpkt functions fail, then password is not cleared
-    
-    with freezero. Unconditionally call freezero to guarantee that password is
-    removed from RAM.
-    
-    From tobias@ and c3h2_ctf via github PR#286, ok djm@
-    
-    OpenBSD-Commit-ID: 6b093619c9515328e25b0f8093779c52402c89cd
+    update .depend
 
-commit 5d3a77f4c5ae774c6796387266503f52c7cdc7c2
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri May 27 04:27:49 2022 +0000
+commit 657e676ff696c7bb787bffb0e249ea1be3b474e1
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Oct 4 01:45:52 2022 +1100
 
-    upstream: Avoid kill with -1 argument. The out_ctx label can be
-    
-    reached before fork has been called. If this happens, then kill -1 would be
-    called, sending SIGTERM to all processes reachable by the current process.
-    
-    From tobias@ and c3h2_ctf via github PR#286, ok djm@
+    update release notes URL
+
+commit f059da2b29840c0f048448809c317ce2ae014da7
+Author: Damien Miller <djm@mindrot.org>
+Date:   Tue Oct 4 01:45:41 2022 +1100
+
+    crank versions in RPM spec files
+
+commit b51f3f172d87cbdb80ca4eb7b2149e56a7647557
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Sep 26 22:18:40 2022 +0000
+
+    upstream: openssh-9.1
     
-    OpenBSD-Commit-ID: 6277af1207d81202f5daffdccfeeaed4c763b1a8
+    OpenBSD-Commit-ID: 5a467b2ee81da01a86adf1ad93b62b1728494e56
 
-commit 533b31cd08e4b97f455466f91c36915e2924c15a
+commit 4cf8d0c0f3030f594a238bab21a0695735515487
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri May 27 04:13:24 2022 +0000
+Date:   Wed Sep 21 22:26:50 2022 +0000
 
-    upstream: Note that ProxyJump also accepts the same tokens as
-    
-    ProxyCommand. From pallxk via github PR#305.
+    upstream: Fix typo. From AlexanderStohr via github PR#343.
     
-    OpenBSD-Commit-ID: 7115ac351b129205f1f1ffa6bbfd62abd76be7c5
+    OpenBSD-Commit-ID: a134c9b4039e48803fc6a87f955b0f4a03181497
 
-commit 9d8c80f8a304babe61ca28f2e3fb5eb6dc9c39bf
+commit 8179fed3264d5919899900ed8881d5f9bb57ca33
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed May 25 06:03:44 2022 +0000
+Date:   Mon Sep 19 21:39:16 2022 +0000
 
-    upstream: revert previous; it was broken (spotted by Theo)
+    upstream: add RequiredRSASize to the list of keywords accepted by
     
-    OpenBSD-Commit-ID: 457c79afaca2f89ec2606405c1059b98b30d8b0d
+    -o; spotted by jmc@
+    
+    OpenBSD-Commit-ID: fe871408cf6f9d3699afeda876f8adbac86a035e
 
-commit 9e0d02ef7ce88b67643bfb1c2272c9f5f04cc680
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed May 25 00:31:13 2022 +0000
+commit 5f954929e9f173dd1e279e07d0e8b14fa845814d
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Sep 19 20:59:34 2022 +1000
 
-    upstream: make SSHBUF_DBG/SSHBUF_TELL (off by default and only enabled
-    
-    via #define) dump to stderr rather than stdout
+    no need for glob.h here
     
-    OpenBSD-Commit-ID: 10298513ee32db8390aecb0397d782d68cb14318
+    it also causes portability problems
 
-commit 2487163630f28be28b7e2396b4bd6511b98f1d3e
-Author: Tim Rice <tim@multitalents.net>
-Date:   Tue May 24 10:21:25 2022 -0700
+commit 03d94a47207d58b3db37eba4f87eb6ae5a63168a
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Sep 19 20:59:04 2022 +1000
 
-    configure.ac: Add missing AC_DEFINE for caph_cache_tzdata test causing
-    HAVE_CAPH_CACHE_TZDATA to be missing from config.h.in.
-    Spotted by Bryan Drewery
+    avoid Wuninitialized false positive in gcc-12ish
 
-commit bedb93415b60db3dfd704a3d525e82adb14a2481
+commit 9d952529113831fb3071ab6e408d2726fd72e771
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun May 15 23:48:07 2022 +0000
+Date:   Mon Sep 19 10:46:00 2022 +0000
 
-    upstream: regress test for in-place transfers and clobbering larger
+    upstream: use users-groups-by-id@openssh.com sftp-server extension
     
-    files with smaller ones; would have caught last regression in scp(1)
+    (when available) to fill in user/group names for directory listings.
+    Implement a client-side cache of see uid/gid=>user/group names. ok markus@
     
-    OpenBSD-Regress-ID: 19de4e88dd3a4f7e5c1618c9be3c32415bd93bc2
+    OpenBSD-Commit-ID: f239aeeadfa925a37ceee36ee8b256b8ccf4466e
 
-commit b4f0d719c2548cb74da509fb65f384dada4ebd37
-Author: anton@openbsd.org <anton@openbsd.org>
-Date:   Fri Apr 22 05:08:43 2022 +0000
+commit 8ff680368b0bccf88ae85d4c99de69387fbad7a6
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Sep 19 10:43:12 2022 +0000
 
-    upstream: Only run agent-ptrace.sh if gdb is available as all
+    upstream: sftp client library support for
     
-    architectures do not ship with gdb.
+    users-groups-by-id@openssh.com; ok markus@
     
-    OpenBSD-Regress-ID: ec53e928803e6b87f9ac142d38888ca79a45348d
+    OpenBSD-Commit-ID: ddb2f33a2da6349a9a89a8b5bcb9ca7c999394de
 
-commit 9b73345f80255a7f3048026462f2c0c6a241eeac
+commit 488f6e1c582212c2374a4bf8cd1b703d2e70fb8b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun May 15 23:47:21 2022 +0000
+Date:   Mon Sep 19 10:41:58 2022 +0000
 
-    upstream: fix in-place copies; r1.163 incorrectly skipped truncation in
+    upstream: extend sftp-common.c:extend ls_file() to support supplied
     
-    all cases, not just at the start of a transfer. This could cause overwrites
-    of larger files to leave junk at the end. Spotted by tb@
+    user/group names; ok markus@
     
-    OpenBSD-Commit-ID: b189f19cd68119548c8e24e39c79f61e115bf92c
+    OpenBSD-Commit-ID: c70c70498b1fdcf158531117e405b6245863bfb0
 
-commit 56a0697fe079ff3e1ba30a2d5c26b5e45f7b71f8
+commit 74b77f7497dba3a58315c8f308883de448078057
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri May 13 06:31:50 2022 +0000
+Date:   Mon Sep 19 10:40:52 2022 +0000
 
-    upstream: arrange for scp, when in sftp mode, to not ftruncate(3) files
+    upstream: sftp-server(8): add a "users-groups-by-id@openssh.com"
     
-    early
+    extension request that allows the client to obtain user/group names that
+    correspond to a set of uids/gids.
     
-    previous behavious of unconditionally truncating the destination file
-    would cause "scp ~/foo localhost:" and "scp localhost:foo ~/" to
-    delete all the contents of their destination.
+    Will be used to make directory listings more useful and consistent
+    in sftp(1).
     
-    spotted by solene@ sthen@, also bz3431; ok dtucker@
+    ok markus@
     
-    OpenBSD-Commit-ID: ca39fdd39e0ec1466b9666f15cbcfddea6aaa179
+    OpenBSD-Commit-ID: 7ebabde0bcb95ef949c4840fe89e697e30df47d3
 
-commit fbcef70c2832712f027bccea1aa9bc4b4103da93
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Mon May 9 08:25:27 2022 +0000
+commit 231a346c0c67cc7ca098360f9a554fa7d4f1eddb
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Sep 19 08:49:50 2022 +0000
 
-    upstream: Remove errant apostrophe. From haruyama at queen-ml org.
+    upstream: better debugging for connect_next()
     
-    OpenBSD-Commit-ID: dc6b294567cb84b384ad6ced9ca469f2bbf0bd10
+    OpenBSD-Commit-ID: d16a307a0711499c971807f324484ed3a6036640
 
-commit 0086a286ea6bbd11ca9b664ac3bb12b27443d6eb
+commit 1875042c52a3b950ae5963c9ca3774a4cc7f0380
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon May 9 03:09:53 2022 +0000
+Date:   Sat Sep 17 10:34:29 2022 +0000
 
-    upstream: Allow existing -U (use agent) flag to work with "-Y sign"
+    upstream: Add RequiredRSASize for sshd(8); RSA keys that fall
     
-    operations, where it will be interpreted to require that the private keys is
-    hosted in an agent; bz3429, suggested by Adam Szkoda; ok dtucker@
+    beneath this limit will be ignored for user and host-based authentication.
     
-    OpenBSD-Commit-ID: a7bc69873b99c32c42c7628ed9ea91565ba08c2f
+    Feedback deraadt@ ok markus@
+    
+    OpenBSD-Commit-ID: 187931dfc19d51873df5930a04f2d972adf1f7f1
 
-commit cb010744cc98f651b1029bb09efa986eb54e4ccf
+commit 54b333d12e55e6560b328c737d514ff3511f1afd
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun May 8 22:58:35 2022 +0000
+Date:   Sat Sep 17 10:33:18 2022 +0000
 
-    upstream: improve error message when 'ssh-keygen -Y sign' is unable to
+    upstream: add a RequiredRSASize for checking RSA key length in
     
-    load a private key; bz3429, reported by Adam Szkoda ok dtucker@
+    ssh(1). User authentication keys that fall beneath this limit will be
+    ignored. If a host presents a host key beneath this limit then the connection
+    will be terminated (unfortunately there are no fallbacks in the protocol for
+    host authentication).
     
-    OpenBSD-Commit-ID: bb57b285e67bea536ef81b1055467be2fc380e74
-
-commit aa61fc82c63d309a90c22ca74fb1da6c6f4372fd
-Author: Tobias Heider <me@tobhe.de>
-Date:   Mon May 9 02:00:01 2022 +0200
-
-    Remove duplicate bcrypt_pbkdf.o from Makefile
+    feedback deraadt, Dmitry Belyavskiy; ok markus@
     
-    bcrypt_pbkdf.o is duplicated in the openbsd-compat Makefile's object
-    file list.
+    OpenBSD-Commit-ID: 430e339b2a79fa9ecc63f2837b06fdd88a7da13a
 
-commit deb506d00da8d11fb04c1e7b9b1e1cc379c1705c
+commit 07d8771bacfefbcfb37fa8a6dc6103bcc097e0ab
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun May 8 22:32:36 2022 +0000
+Date:   Sat Sep 17 10:30:45 2022 +0000
 
-    upstream: When performing operations that glob(3) a remote path, ensure
-    
-    that the implicit working directory used to construct that path escapes
-    glob(3) characters.
-    
-    This prevents glob characters from being processed in places they
-    shouldn't, e.g. "cd /tmp/a*/", "get *.txt" should have the get operation
-    treat the path "/tmp/a*" literally and not attempt to expand it.
+    upstream: Add a sshkey_check_rsa_length() call for checking the
     
-    Reported by Lusia Kundel; ok markus@
+    length of an RSA key; ok markus@
     
-    OpenBSD-Commit-ID: 4f647f58482cbad3d58b1eab7f6a1691433deeef
-
-commit f38cf74f20b5da113cfa823afd5bfb5c6ba65f3d
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri May 6 14:50:18 2022 +1000
-
-    Also retest OpenBSD upstream on .yml changes.
+    OpenBSD-Commit-ID: de77cd5b11594297eda82edc594b0d32b8535134
 
-commit f87a132800ba3710ab130d703448a31ef1128d77
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri May 6 14:46:09 2022 +1000
+commit 3991a0cf947cf3ae0f0373bcec5a90e86a7152f5
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Sat Sep 17 10:11:29 2022 +0000
 
-    Note that, for now, we need variadic macros.
+    upstream: actually hook up restrict_websafe; the command-line flag
+    
+    was never actually used. Spotted by Matthew Garrett
+    
+    OpenBSD-Commit-ID: 0b363518ac4c2819dbaa3dfad4028633ab9cdff1
 
-commit 217b518e0f7c52c4b909e935141a55344c61e644
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri May 6 14:39:34 2022 +1000
+commit 30b2a7e4291fb9e357f80a237931ff008d686d3b
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Sep 16 06:55:37 2022 +0000
 
-    Add ubsan minimal testcase on OpenBSD.
+    upstream: correct error value
     
-    As suggested by djm@.
+    OpenBSD-Commit-ID: 780efcbad76281f11f14b2a5ff04eb6db3dfdad4
 
-commit 457dce2cfef6a48f5442591cd8b21c7e8cba13f8
+commit ac1ec9545947d9f9657259f55d04cb49d3a94c8a
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu May 5 01:04:14 2022 +0000
+Date:   Fri Sep 16 03:33:14 2022 +0000
 
-    upstream: sshkey_unshield_private() contains a exact duplicate of
+    upstream: sftp: Be a bit more clever about completions
     
-    the code in private2_check_padding(). Pull private2_check_padding() up so the
-    code can be reused. From Martin Vahlensieck, ok deraadt@
+    There are commands (e.g. "get" or "put") that accept two
+    arguments, a local path and a remote path. However, the way
+    current completion is written doesn't take this distinction into
+    account and always completes remote or local paths.
     
-    OpenBSD-Commit-ID: 876884c3f0e62e8fd8d1594bab06900f971c9c85
+    By expanding CMD struct and "cmds" array this distinction can be
+    reflected and with small adjustment to completer code the correct
+    path can be completed.
+    
+    By Michal Privoznik, ok dtucker@
+    
+    OpenBSD-Commit-ID: 1396d921c4eb1befd531f5c4a8ab47e7a74b610b
 
-commit 0e44db4d9cb313e68a59a44d27884af66c02356e
+commit 590db83384f9d99fc51c84505792d26d1ef60df9
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu May 5 00:56:58 2022 +0000
+Date:   Fri Sep 16 03:13:34 2022 +0000
 
-    upstream: channel_new no longer frees remote_name. So update the
+    upstream: sftp: Don't attempt to complete arguments for
     
-    comment accordingly.  As remote_name is not modified, it can be const as
-    well. From Martin Vahlensieck
+    non-existent commands
     
-    OpenBSD-Commit-ID: e4e10dc8dc9f40c166ea5a8e991942bedc75a76a
+    If user entered a non-existent command (e.g. because they made a
+    typo) there is no point in trying to complete its arguments. Skip
+    calling complete_match() if that's the case.
+    
+    From Michal Privoznik
+    
+    OpenBSD-Commit-ID: cf39c811a68cde2aeb98fc85addea4000ef6b07a
 
-commit 37b62fd5caf19c85a48241535277cefff65adace
+commit ff9809fdfd1d9a91067bb14a77d176002edb153c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu May 5 00:55:11 2022 +0000
+Date:   Wed Sep 14 00:14:37 2022 +0000
 
-    upstream: mux.c: mark argument as const; from Martin Vahlensieck
+    upstream: sk_enroll: never drop SSH_SK_USER_VERIFICATION_REQD flag
     
-    OpenBSD-Commit-ID: 69a1a93a55986c7c2ad9f733c093b46a47184341
-
-commit f4e67c0ad259b4cf10177277a5827fa5545bac53
-Author: markus@openbsd.org <markus@openbsd.org>
-Date:   Wed May 4 07:31:22 2022 +0000
-
-    upstream: make sure stdout is non-blocking; ok djm@
+    from response
     
-    OpenBSD-Commit-ID: 64940fffbd1b882eda2d7c8c7a43c79368309c0d
+    Now that all FIDO signing calls attempt first without PIN and then
+    fall back to trying PIN only if that attempt fails, we can remove the
+    hack^wtrick that removed the UV flag from the keys returned during
+    enroll.
+    
+    By Corinna Vinschen
+    
+    OpenBSD-Commit-ID: 684517608c8491503bf80cd175425f0178d91d7f
 
-commit e5c036d2092c00bef395e9161dc5ce42d4be9565
-Author: florian@openbsd.org <florian@openbsd.org>
-Date:   Tue May 3 07:42:27 2022 +0000
+commit 940dc10729cb5a95b7ee82c10184e2b9621c8a1d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Sep 14 00:13:13 2022 +0000
 
-    upstream: Add FIDO AUTHENTICATOR section and explain a bit how FIDO
+    upstream: a little extra debugging
     
-    works. The wording came mostly from the 8.2 OpenSSH release notes, addapted
-    to fit the man page. Then move the -O bits into the new section as is already
-    done for CERTIFICATES and MODULI GENERATION. Finally we can explain the
-    trade-offs of resident keys. While here, consistently refer to the FIDO
-    thingies as "FIDO authenticators", not "FIDO tokens".
+    OpenBSD-Commit-ID: edf1601c1d0905f6da4c713f4d9cecc7d1c0295a
+
+commit 4b5f91cb959358141181b934156513fcb8a6c1e3
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Sep 14 00:02:03 2022 +0000
+
+    upstream: ssh-agent: attempt FIDO key signing without PIN and use
     
-    input & OK jmc, naddy
+    the error to determine whether a PIN is required and prompt only if
+    necessary. from Corinna Vinschen
     
-    OpenBSD-Commit-ID: dd98748d7644df048f78dcf793b3b63db9ab1d25
+    OpenBSD-Commit-ID: dd6be6a0b7148608e834ee737c3479b3270b00dd
 
-commit 575771bf79bef7127be6aaccddc46031ea15529e
+commit 113523bf0bc33600b07ebb083572c8c346b6fdf4
 Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Mon May 2 05:40:37 2022 +0000
+Date:   Sun Sep 11 06:38:11 2022 +0000
 
-    upstream: remove an obsolete rsa1 format example from an example;
+    upstream: .Li -> .Vt where appropriate; from josiah frentsos,
     
-    from megan batty
-    ok djm
+    tweaked by schwarze
     
-    OpenBSD-Commit-ID: db2c89879c29bf083df996bd830abfb1e70d62bf
+    ok schwarze
+    
+    OpenBSD-Commit-ID: 565046e3ce68b46c2f440a93d67c2a92726de8ed
 
-commit 0bc6b4c8f04e292577bdb44d5dc6b630d3448087
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun May 1 23:20:30 2022 +0000
+commit 86af013b56cecb5ee58ae0bd9d495cd586fc5918
+Author: jsg@openbsd.org <jsg@openbsd.org>
+Date:   Sat Sep 10 08:50:53 2022 +0000
 
-    upstream: fix some integer overflows in sieve_large() that show up when
-    
-    trying to generate modp groups > 16k bits. Reported via GHPR#306 by Bertram
-    Felgenhauer, but fixed in a different way. feedback/ok tb@
+    upstream: fix repeated words ok miod@ jmc@
     
-    OpenBSD-Commit-ID: 81cbc6dd3a21c57bd6fadea10e44afe37bca558e
+    OpenBSD-Commit-ID: 6765daefe26a6b648cc15cadbbe337596af709b7
 
-commit a45615cb172bc827e21ec76750de39dfb30ecc05
+commit 0ba39b93b326a7d5dfab776cc9b9d326161a9b16
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Apr 29 04:55:07 2022 +0000
+Date:   Fri Sep 9 03:31:42 2022 +0000
 
-    upstream: be stricter in which characters will be accepted in
+    upstream: notifier_complete(NULL, ...) is a noop, so no need to test
     
-    specifying a mask length; allow only 0-9. From khaleesicodes via GHPR#278; ok
-    dtucker@
+    that ctx!=NULL; from Corinna Vinschen
     
-    OpenBSD-Commit-ID: e267746c047ea86665cdeccef795a8a56082eeb2
-
-commit 4835544d2dd31de6ffc7dba59f92093aea98155b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Apr 30 10:56:41 2022 +1000
-
-    Add Mac OS X 12 test target.
+    OpenBSD-Commit-ID: ade2f2e9cc519d01a586800c25621d910bce384a
 
-commit 97a6a8b8c1f2da09712d0e72d0ef800e4edd34cd
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 29 18:27:34 2022 +1000
+commit be197635329feb839865fdc738e34e24afd1fca8
+Author: Sam James <sam@gentoo.org>
+Date:   Thu Sep 8 02:49:29 2022 +0100
 
-    Only run tests when source files change.
+    openbsd-compat/bsd-asprintf: add <stdio.h> include for vsnprintf
     
-    Also run tests on changes to V_9_0 branch.
+    Fixes the following build failure with Clang 15 on musl:
+    ```
+    bsd-asprintf.c:51:8: error: call to undeclared library function 'vsnprintf' with type 'int (char *, unsigned long, const char *, struct __va_list_tag *)'; ISO C99 and laterclang -O2 -pipe -fdiagnostics-color=always -frecord-gcc-switches -pipe -Wunknown-warning-option -Qunused-arguments -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -Wmisleading-indentation -Wbitwise-instead-of-logical -fno-strict-aliasing -mretpoline  -ftrapv -fzero-call-used-regs=all -fno-builtin-memset -fstack-protector-strong -fPIE   -I. -I.  -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -DSSHDIR=\"/etc/ssh\" -D_PATH_SSH_PROGRAM=\"/usr/bin/ssh\" -D_PATH_SSH_ASKPASS_DEFAULT=\"/usr/lib/misc/ssh-askpass\" -D_PATH_SFTP_SERVER=\"/usr/lib/misc/sftp-server\" -D_PATH_SSH_KEY_SIGN=\"/usr/lib/misc/ssh-keysign\" -D_PATH_SSH_PKCS11_HELPER=\"/usr/lib/misc/ssh-pkcs11-helper\" -D_PATH_SSH_SK_HELPER=\"/usr/lib/misc/ssh-sk-helper\" -D_PATH_SSH_PIDDIR=\"/run\" -D_PATH_PRIVSEP_CHROOT_DIR=\"/var/empty\" -DHAVE_CONFIG_H -c cipher-aes.c -o cipher-aes.o
+     do not support
+          implicit function declarations [-Wimplicit-function-declaration]
+            ret = vsnprintf(string, INIT_SZ, fmt, ap2);
+                  ^
+    bsd-asprintf.c:51:8: note: include the header <stdio.h> or explicitly provide a declaration for 'vsnprintf'
+    1 error generated.
+    ```
 
-commit 6d0392b9ff4b50a56ac5685d1b9392e2cd432ca3
+commit 6cb6f660bb35f77a0456dd2581ddf39c29398a5e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 29 18:22:34 2022 +1000
+Date:   Fri Sep 2 16:43:27 2022 +1000
 
-    Remove now-empty int32_minmax.inc.
+    Remove DEF_WEAK, it's already in defines.h.
 
-commit af59463553b5ad52d3b42c4455ee3c5600158bb7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Apr 29 03:24:30 2022 +0000
+commit ce39e7d8b70c4726defde5d3bc4cb7d40d131153
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Sep 2 14:28:14 2022 +1000
 
-    upstream: mention that the helpers are used by ssh(1), ssh-agent(1)
-    
-    and ssh-keygen(1). Previously only ssh(1) was mentioned. From Pedro
-    Martelletto
+    Resync arc4random with OpenBSD.
     
-    OpenBSD-Commit-ID: 30f880f989d4b329589c1c404315685960a5f153
+    This brings us up to current, including djm's random-reseeding change,
+    as prompted by logan at cyberstorm.mu in bz#3467.  It brings the
+    platform-specific hooks from LibreSSL Portable, simplified to match our
+    use case.  ok djm@.
 
-commit 3e26b3a6eebcee27be177207cc0846fb844b7a56
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Apr 29 03:16:48 2022 +0000
+commit beaddde26f30e2195b8aa4f3193970e140e17305
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Sep 2 14:20:04 2022 +1000
 
-    upstream: Don't leak SK device. Patch from Pedro Martelletto via
-    
-    github PR#316. ok djm@
+    Move OPENBSD ORIGINAL marker.
     
-    OpenBSD-Commit-ID: 17d11327545022e727d95fd08b213171c5a4585d
+    Putting this after the copyright statement (which doesn't change)
+    instead of before the version identifier (which does) prevents merge
+    conflicts when resyncing changes.
 
-commit 247082b5013f0d4fcae8f97453f2a2f01bcda811
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Apr 29 03:13:32 2022 +0000
+commit c83e467ead67a8cb48ef4bec8085d6fb880a2ff4
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Sep 2 14:17:28 2022 +1000
 
-    upstream: fix memleak on session-bind path; from Pedro Martelletto, ok
-    
-    dtucker@
+    Remove arc4random_uniform from arc4random.c
     
-    OpenBSD-Commit-ID: e85899a26ba402b4c0717b531317e8fc258f0a7e
+    This was previously moved into its own file (matching OpenBSD) which
+    prematurely committed in commit 73541f2.
 
-commit e05522008092ceb86a87bdd4ad7878424315db89
+commit 5f45c2395c60865e59fa44152ff1d003a128c5bc
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Apr 28 02:53:31 2022 +0000
+Date:   Fri Sep 2 04:20:02 2022 +0000
 
-    upstream: avoid printing hash algorithm twice; from lucas AT sexy.is
+    upstream: sk-usbhid: fix key_lookup() on tokens with built-in UV
     
-    OpenBSD-Commit-ID: 9d24671e10a84141b7c504396cabad600e47a941
-
-commit 0979e29356915261d69a9517a1e0aaade7c9fc75
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Apr 27 11:08:55 2022 +0000
-
-    upstream: Add authfd path to debug output. ok markus@
+    explicitly test whether the token performs built-in UV (e.g. biometric
+    tokens) and enable UV in that case. From Pedro Martelletto via GHPR#388
     
-    OpenBSD-Commit-ID: f735a17d1a6f2bee63bfc609d76ef8db8c090890
+    OpenBSD-Commit-ID: 007eb7e387d27cf3029ab06b88224e03eca62ccd
 
-commit 67b7c784769c74fd4d6b147d91e17e1ac1a8a96d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Apr 26 07:41:44 2022 +0000
+commit 03277a4aa49b80af541a3e691f264c0c0d8f9cec
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Aug 31 20:26:30 2022 +1000
 
-    upstream: Check sshauthopt_new() for NULL. bz#3425, from
-    
-    tessgauthier at microsoft.com.  ok djm@
-    
-    OpenBSD-Commit-ID: af0315bc3e44aa406daa7e0ae7c2d719a974483f
+    Move sftp from valgrind-2 to 3 to rebalance.
 
-commit d571314d14b919fbd7c84a61f9bf2065fc0a6841
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Wed Apr 20 16:00:25 2022 +0000
+commit fcf5365da69c516817321ba89c3a91df98d098df
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Aug 31 02:56:40 2022 +0000
 
-    upstream: Remove unnecessary includes: openssl/hmac.h and
-    
-    openssl/evp.h. From Martin Vahlensieck.
+    upstream: whitespace
     
-    OpenBSD-Commit-ID: a6debb5fb0c8a44e43e8d5ca7cc70ad2f3ea31c3
+    OpenBSD-Commit-ID: c2bcbf93610d3d62ed206cdf9bf9ff98c6aaf232
 
-commit da8dddf8cc1f2516ff894b8183e83a7c5ba3ef80
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Wed Apr 20 15:59:18 2022 +0000
+commit e60136a3d7a223dd8e84ba8a6895bc3142360993
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Aug 29 13:27:45 2022 +1000
 
-    upstream: Add missing includes of stdlib.h and stdint.h. We need
-    
-    stdlib.h for malloc(3) and stdint.h for SIZE_MAX. Unlike the other xmss
-    files, ssh-xmss.c does not include xmss_commons.h so ssh-xmss.c must include
-    those headers itself. From Martin Vahlensieck
-    
-    OpenBSD-Commit-ID: 70e28a9818cee3da1be2ef6503d4b396dd421e6b
+    additional keys
 
-commit fe9d87a6800a7a33be08f4d5ab662a758055ced2
-Author: millert@openbsd.org <millert@openbsd.org>
-Date:   Wed Apr 20 15:56:49 2022 +0000
+commit 2b02dcb505288c462d1b5dd1ac04e603d01340eb
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Aug 29 13:23:43 2022 +1000
 
-    upstream: Avoid an unnecessary xstrdup in rm_env() when matching
-    
-    patterns. Since match_pattern() doesn't modify its arguments (they are
-    const), there is no need to make an extra copy of the strings in
-    options->send_env. From Martin Vahlensieck
+    cross-sign allowed_signers with PGP key
     
-    OpenBSD-Commit-ID: 2c9db31e3f4d3403b49642c64ee048b2a0a39351
+    Provides continuity of trust from legacy PGP release key to
+    the SSHSIG signing keys that we will use henceforth for git
+    signing.
 
-commit 7bf2eb958fbb551e7d61e75c176bb3200383285d
+commit 51b345f177ae981b8755f6bdf8358b1cc5e83d67
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Apr 26 23:30:59 2022 +1000
+Date:   Sat Aug 27 21:49:27 2022 +1000
 
-    Add debian-riscv64 test target.
+    Add libcrypt-devel to cygwin-release deps.
+    
+    Based on feedback from vinschen at redhat.com.
 
-commit 3913c935523902482974c4c503bcff20bd850a6a
+commit 9f81736cf16dd8dda1c8942f1973a5f80b8cd78c
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Apr 25 17:20:06 2022 +1000
+Date:   Sat Aug 27 09:37:40 2022 +1000
 
-    Update OpenSSL and LibreSSL versions in tests.
+    Add Windows 2022 test targets.
 
-commit dcd8dca29bcdb193ff6be35b96fc55e6e30d37d9
+commit 85e1a69243f12be8520438ad6a3cfdc0b7fcbb2d
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Apr 23 20:40:28 2022 +1000
+Date:   Fri Aug 26 16:26:06 2022 +1000
 
-    Include stdlib.h for free() prototype.
+    Add cygwin-release test target.
     
-    ... which is used inside the CUSTOM_SYS_AUTH_GET_LASTLOGIN_MSG block.
+    This also moves the cygwin package install from the workflow file to
+    setup_ci.sh so that we can install different sets of Cygwin packages
+    for different test configs.
 
-commit 4cc05de568e1c3edd7834ff3bd9d8214eb34861b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Apr 23 20:17:26 2022 +1000
+commit 92382dbe8bf9ea1225b16858f9b9b208c15c7e8d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 26 08:16:27 2022 +0000
 
-    Cache timezone data in capsicum sandbox.
+    upstream: whitespace
     
-    From emaste at freebsd.org, originally part of FreeBSD commit r339216
-    / fc3c19a9 with autoconf bits added by me.
+    OpenBSD-Commit-ID: a5d015efbfd228dc598ffdef612d2da3a579e5d8
 
-commit c31404426d212e2964ff9e5e58e1d0fce3d83f27
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Apr 21 01:36:46 2022 +0000
+commit 70a5de0a50e84d7250eb4e4537f765599f64c4af
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 26 08:12:56 2022 +0000
 
-    upstream: It looks like we can't completely avoid
-    
-    waiting for processes to exit so retrieve the pid via controlmaster and
-    use that.
+    upstream: whitespace
     
-    OpenBSD-Regress-ID: 8246f00f22b14e49d2ff1744c94897ead33d457b
+    OpenBSD-Commit-ID: d297e4387935d4aef091c5e9432578c2e513f538
 
-commit d19b21afab5c8e2f3df6bd8aee9766bdad3d8c58
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Apr 20 13:25:55 2022 +0000
+commit 3a683a19fd116ea15ebf8aa13d02646cceb302a9
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Aug 26 14:23:55 2022 +1000
 
-    upstream: Use ssh -f and ControlPersist ..
-    
-    to start up test forwards and ssh -O stop to shut them down intead of
-    sleep loops.  This speeds up the test by an order of magnitude.
-    
-    OpenBSD-Regress-ID: eb3db5f805100919b092a3b2579c611fba3e83e7
+    initial list of allowed signers
+
+commit 6851f4b8c3fc1b3e1114c56106e4dc31369c8513
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 19 17:22:18 2022 +1000
 
-commit 5f76286a126721fa005de6edf3d1c7a265555f19
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Apr 20 05:24:13 2022 +0000
+    Install Cygwin packages based on OS not config.
 
-    upstream: Simplify forward-control test.
+commit f96480906893ed93665df8cdf9065865c51c1475
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 19 06:07:47 2022 +0000
+
+    upstream: attemp FIDO key signing without PIN and use the error
     
-    Since we no longer need to support SSH1 we don't need to run shell
-    commands on the other end of the connection and can use ssh -N instead.
-    This also makes the test less racy.
+    code returned to fall back only if necessary. Avoids PIN prompts for FIDO
+    tokens that don't require them; part of GHPR#302
     
-    OpenBSD-Regress-ID: 32e94ce272820cc398f30b848b2b0f080d10302c
+    OpenBSD-Commit-ID: 4f752aaf9f2e7c28bcaaf3d4f8fc290131bd038e
 
-commit 687bbf23572d8bdf25cbbcdf8ac583514e1ba710
+commit 5453333b5d28e313284cb9aae82899704103f98d
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Mar 31 03:07:33 2022 +0000
+Date:   Fri Aug 19 05:53:28 2022 +0000
 
-    upstream: regression test for sftp cp command
+    upstream: remove incorrect check that can break enrolling a
     
-    OpenBSD-Regress-ID: c96bea9edde3a384b254785e7f9b2b24a81cdf82
+    resident key (introduced in r1.40)
+    
+    OpenBSD-Commit-ID: 4cab364d518470e29e624af3d3f9ffa9c92b6f01
 
-commit f1233f19a6a9fe58f52946f50df4772f5b136761
+commit ff89b1bed80721295555bd083b173247a9c0484e
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Apr 20 01:13:47 2022 +0000
+Date:   Fri Aug 19 04:02:46 2022 +0000
 
-    upstream: Import regenerated moduli
+    upstream: Strictly enforce the maximum allowed SSH2 banner size in
     
-    OpenBSD-Commit-ID: f9a0726d957cf10692a231996a1f34e7f9cdfeb0
+    ssh-keyscan and prevent a one-byte buffer overflow.  Patch from Qualys, ok
+    djm@
+    
+    OpenBSD-Commit-ID: 6ae664f9f4db6e8a0589425f74cd0bbf3aeef4e4
 
-commit fec014785de198b9a325d1b94e324bb958c5fe7b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Apr 20 04:19:11 2022 +0000
+commit 1b470b9036639cef4f32fb303bb35ea0b711178d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 19 15:18:09 2022 +1000
 
-    upstream: Try to continue running local I/O for channels in state
-    
-    OPEN during SSH transport rekeying. The most visible benefit is that it
-    should make ~-escapes work in the client (e.g. to exit) if the connection
-    happened to have stalled during a rekey event. Based work by and ok dtucker@
-    
-    OpenBSD-Commit-ID: a66e8f254e92edd4ce09c9f750883ec8f1ea5f45
+    Fix cygwin conditional steps.
 
-commit e68154b0d4f0f5085a050ea896955da1b1be6e30
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Apr 20 01:13:47 2022 +0000
+commit fd6ee741ab16714b7035d60aca924123ba28135a
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 19 15:12:57 2022 +1000
 
-    upstream: Import regenerated moduli
-    
-    OpenBSD-Commit-ID: f9a0726d957cf10692a231996a1f34e7f9cdfeb0
+    Add a bit more debug output.
 
-commit 69928b106d8f0fa15b88cf3850d992ed81c44ae0
-Author: tj@openbsd.org <tj@openbsd.org>
-Date:   Sat Apr 16 00:22:31 2022 +0000
+commit a9305c4c739f4d91a3d3a92c0b6d4949404a36c5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 12 15:08:47 2022 +1000
 
-    upstream: list the correct version number
-    
-    for when usage of the sftp protocol became default and fix a typo
-    from ed maste
+    Add Cygwin (on windows-2019) test target.
     
-    OpenBSD-Commit-ID: 24e1795ed2283fdeacf16413c2f07503bcdebb31
+    In addition to installing the requisite Cygwin packages, we also need to
+    explicitly invoke "sh" for steps that run other scripts since the runner
+    environment doesn't understand #! paths.
 
-commit 21042a05c0b304c16f655efeec97438249d2e2cc
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Apr 12 05:09:49 2022 +0000
+commit 5062ad48814b06162511c4f5924a33d97b6b2566
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 19 03:06:30 2022 +0000
 
-    upstream: Correct path for system known hosts file in description
-    
-    of IgnoreUserKnownHosts.  Patch from Martin Vahlensieck via tech@
+    upstream: double free() in error path; from Eusgor via GHPR333
     
-    OpenBSD-Commit-ID: 9b7784f054fa5aa4d63cb36bd563889477127215
+    OpenBSD-Commit-ID: 39f35e16ba878c8d02b4d01d8826d9b321be26d4
 
-commit 53f4aff60a7c1a08a23917bd47496f8901c471f5
+commit 5a5c580b48fc6006bdfa731fc2f6d4945c2c0e4e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Apr 16 14:33:20 2022 +1000
+Date:   Thu Aug 18 21:36:39 2022 +1000
 
-    Resync moduli.5 with upstream.
+    Check for perms to run agent-getpeereid test.
     
-    1.18: remove duplicate publication year; carsten dot kunze at arcor dot de
-    1.19: ssh-keygen's -G/-T have been replaced with -M generate/screen.
+    Ubuntu 22.04 defaults to private home dirs which prevents "nobody"
+    running ssh-add during the agent-getpeereid test.  Check for this and
+    add the necessary permissions.
 
-commit d2b888762b9844eb0d8eb59909cdf5af5159f810
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Apr 16 14:31:13 2022 +1000
+commit cd06a76b7ccc706e2bb4f1cc4aa9e9796a28a812
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Aug 17 16:04:16 2022 +1000
 
-    Retire fbsd6 test VM.
+    on Cygwin, prefer WinHello FIDO device
     
-    It's long since out of support, relatively slow (it's i686) and the
-    compiler has trouble with PIE.
+    If no FIDO device was explictly specified, then prefer the
+    windows://hello FIDO device. An exception to this is when
+    probing resident FIDO keys, in which case hardware FIDO
+    devices are preferred.
 
-commit cd1f70009860a154b51230d367c55ea5f9a4504e
+commit 47f72f534ac5cc2cd3027675a3df7b00a8f77575
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Apr 11 22:52:08 2022 +0000
+Date:   Wed Aug 17 06:01:57 2022 +0000
 
-    upstream: clear io_want/io_ready flags at start of poll() cycle;
+    upstream: add an extra flag to sk_probe() to indicate whether we're
     
-    avoids plausible spin during rekeying if channel io_want flags are reused
-    across cycles. ok markus@ deraadt@
+    probing for a FIDO resident key or not. Unused here, but will make like
+    easier for portable
     
-    OpenBSD-Commit-ID: 91034f855b7c73cd2591657c49ac30f10322b967
+    OpenBSD-Commit-ID: 432c8ff70e270378df9dbceb9bdeaa5b43b5a832
 
-commit aa1920302778273f7f94c2091319aba199068ca0
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Apr 8 05:43:39 2022 +0000
+commit edb0bcb3c79b16031dc87a8e57aecc3c4a3414f0
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Tue Aug 16 20:24:08 2022 +0000
 
-    upstream: Note that curve25519-sha256 was later published in
-    
-    RFC8731.  ok djm@
+    upstream: use .Cm for "sign"; from josiah frentsos
     
-    OpenBSD-Commit-ID: 2ac2b5d642d4cf5918eaec8653cad9a4460b2743
+    OpenBSD-Commit-ID: 7f80a53d54857ac6ae49ea6ad93c5bd12231d1e4
 
-commit 4673fa8f2be983f2f88d5afd754adb1a2a39ec9e
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Apr 8 04:40:40 2022 +0000
+commit cccb011e130cbbac538b1689d10e4a067298df8b
+Author: Corinna Vinschen <vinschen@redhat.com>
+Date:   Thu Aug 11 20:19:35 2022 +0200
 
-    upstream: two defensive changes from Tobias Stoeckmann via GHPR287
+    Revert "check_sk_options: add temporary WinHello workaround"
     
-    enforce stricter invarient for sshbuf_set_parent() - never allow
-    a buffer to have a previously-set parent changed.
+    Cygwin now comes with libfido2 1.11.0, so this workaround
+    isn't required anymore.
     
-    In sshbuf_reset(), if the reallocation fails, then zero the entire
-    buffer and not the (potentially smaller) default initial alloc size.
+    This reverts commit 242c044ab111a37aad3b0775727c36a4c5f0102c.
     
-    OpenBSD-Commit-ID: 14583203aa5d50ad38d2e209ae10abaf8955e6a9
+    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
 
-commit 26eef015e2d2254375e13afaaf753b78932b1bf5
-Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Apr 11 16:07:09 2022 +1000
+commit 9468cd7cf9d989dfa2ac20e2a0268ba6e93bfa5a
+Author: Corinna Vinschen <vinschen@redhat.com>
+Date:   Thu Aug 11 20:18:17 2022 +0200
 
-    Revert "update build-aux files to match autoconf-2.71"
+    fido_dev_is_winhello: return 0, not "false"
     
-    This reverts commit 0a8ca39fac6ad19096b6c263436f8b2dd51606f2.
+    "false" is not used anywhere in OpenSSH, so return 0 like
+    everywhere else.
     
-    It turns out that the checked-in copies of these files are actually newer
-    than autoconf-2.71's copies, so this was effectively a downgrade.
-    Spotted by Bo Anderson via github
+    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
 
-commit 0a8ca39fac6ad19096b6c263436f8b2dd51606f2
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Apr 8 14:48:58 2022 +1000
+commit 730a80609472ee0451c99482d75c9c41f3ebc42d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Aug 12 05:20:28 2022 +0000
 
-    update build-aux files to match autoconf-2.71
+    upstream: sftp-server: support home-directory request
     
-    i.e. config.guess, config.sub and install-sh
+    Add support to the sftp-server for the home-directory extension defined
+    in draft-ietf-secsh-filexfer-extensions-00. This overlaps a bit with the
+    existing expand-path@openssh.com, but uses a more official protocol name,
+    and so is a bit more likely to be implemented by non-OpenSSH clients.
+    
+    From Mike Frysinger, ok dtucker@
+    
+    OpenBSD-Commit-ID: bfc580d05cc0c817831ae7ecbac4a481c23566ab
 
-commit 94eb6858efecc1b4f02d8a6bd35e149f55c814c8
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Apr 6 10:47:48 2022 +1000
+commit 5e820bf79ce3ce99ef7e98b0ab642b0a0a4f396c
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Aug 12 14:56:55 2022 +1000
 
-    update version numbers for release
+    Replace deprecated ubuntu-18.04 runners with 22.04
 
-commit 8e4a8eadf4fe74e65e6492f34250f8cf7d67e8da
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Apr 4 22:45:25 2022 +0000
+commit 87b0d9c1b789d3ff958ec45df2ac912e24461bae
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Aug 11 22:48:23 2022 +1000
 
-    upstream: openssh-9.0
+    Add a timegm implementation from Heimdal via Samba.
     
-    OpenBSD-Commit-ID: 0dfb461188f4513ec024c1534da8c1ce14c20b64
+    Fixes build on (at least Solaris 10).
 
-commit a9f23ea2e3227f406880c2634d066f6f50fa5eaa
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Thu Mar 31 17:58:44 2022 +0000
+commit d0c4fa58594577994921b593f10037c5282597ca
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Aug 11 14:23:58 2022 +1000
 
-    upstream: ssh: document sntrup761x25519-sha512@openssh.com as
-    
-    default KEX
-    
-    OpenBSD-Commit-ID: 12545bfa10bcbf552d04d9d9520d0f4e98b0e171
+    Rerun tests if any .github config file changes.
 
-commit 9ec2713d122af79d66ebb9c1d6d9ae8621a8945f
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Thu Mar 31 17:27:27 2022 +0000
+commit 113fe6c77ab43769fc61e953d07cb619fd7ea54b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Thu Aug 11 13:33:51 2022 +1000
 
-    upstream: man pages: add missing commas between subordinate and
-    
-    main clauses
-    
-    jmc@ dislikes a comma before "then" in a conditional, so leave those
-    untouched.
+    Skip hostbased during Valgrind tests.
     
-    ok jmc@
+    Valgrind doesn't let ssh exec ssh-keysign (because it's setuid) so skip
+    it during the Valgrind based tests.
     
-    OpenBSD-Commit-ID: 9520801729bebcb3c9fe43ad7f9776ab4dd05ea3
-
-commit 3741df98ffaaff92b474ee70d8ef276b5882f85a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Apr 4 23:52:11 2022 +1000
-
-    Disable security key on fbsd6 test host.
+    See https://bugs.kde.org/show_bug.cgi?id=119404 for a discussion of this
+    (ironically there the problematic binary was ssh(1) back when it could
+    still be setuid).
 
-commit 32c12236f27ae83bfe6d2983b67c9bc67a83a417
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Apr 4 15:16:51 2022 +1000
+commit b98a42afb69d60891eb0488935990df6ee571c4d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Aug 11 01:57:50 2022 +0000
 
-    Specify TEST_SHELL=bash on AIX.
+    upstream: add some tests for parse_absolute_time(), including cases
     
-    The system shells cause the agent-restrict test to fail due to some
-    quoting so explicitly specify bash until we can get configure to
-    autmatically work around that.
+    where it is forced to the UTC timezone. bz3468 ok dtucker
+    
+    OpenBSD-Regress-ID: ea07ca31c2f3847a38df028ca632763ae44e8759
 
-commit 90452c8b69d065b7c7c285ff78b81418a75bcd76
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 23:38:44 2022 +1100
+commit ec1ddb72a146fd66d18df9cd423517453a5d8044
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Aug 11 01:56:51 2022 +0000
 
-    Only return events from ppoll that were requested.
+    upstream: allow certificate validity intervals, sshsig verification
     
-    If the underlying system's select() returns bits that were not in the
-    request set, our ppoll() implementation can return revents for events
-    not requested, which can apparently cause a hang.  Only return revents
-    for activity in the requested event set.  bz#3416, analysis and fix by
-    yaroslav.kuzmin at vmssoftware com, ok djm@
+    times and authorized_keys expiry-time options to accept dates in the UTC time
+    zone in addition to the default of interpreting them in the system time zone.
+    YYYYMMDD and YYMMDDHHMM[SS] dates/times will be interpreted as UTC if
+    suffixed with a 'Z' character.
+    
+    Also allow certificate validity intervals to be specified in raw
+    seconds-since-epoch as hex value, e.g. -V 0x1234:0x4567890. This
+    is intended for use by regress tests and other tools that call
+    ssh-keygen as part of a CA workflow.
+    
+    bz3468 ok dtucker
+    
+    OpenBSD-Commit-ID: 454db1cdffa9fa346aea5211223a2ce0588dfe13
 
-commit 6c49eb5fabc56f4865164ed818aa5112d09c31a8
+commit 4df246ec75751da7eb925e1880498300d8bda187
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 23:21:40 2022 +1100
+Date:   Thu Aug 11 10:23:55 2022 +1000
 
-    Only run regression tests on slow VMs.
+    Fix conditional for running hostbased tests.
 
-commit f67e47903977b42cb6abcd5565a61bd7293e4dc3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 23:21:06 2022 +1100
+commit 2580916e48721802220c61ce9e0df1297c00bc07
+Author: Damien Miller <djm@mindrot.org>
+Date:   Thu Aug 11 08:58:28 2022 +1000
 
-    Increase test timeout to allow slow VMs to finish
+    fix SANDBOX_SECCOMP_FILTER_DEBUG
 
-commit 02488c1b54065ddc4f25835dbd2618b2a2fe21f5
+commit fdbd5bf507fc271ff813714fab8a72ff2c6cb5ca
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 16:27:38 2022 +1100
+Date:   Wed Aug 10 17:35:52 2022 +1000
 
-    Use bash or ksh if available for SH in Makefile.
+    Test hostbased auth on github runners.
 
-commit 34c7018c316af4773e432066de28d0ef9d0888cd
+commit 7e2f51940ba48a1c0fae1107801ea643fa83c971
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 14:56:54 2022 +1100
+Date:   Wed Aug 10 17:25:24 2022 +1000
 
-    Set Makefile SHELL as determined by configure.
+    Rename our getentropy to prevent possible loops.
     
-    This should improve compatibility for users with non-POSIX shells.  If
-    using Makefile.in directly (eg make -f Makefile.in distprep) then SHELL
-    will need to be specified on the command line (along with MANFMT in that
-    particular case).  ok djm@
+    Since arc4random seeds from getentropy, and we use OpenSSL for that
+    if enabled, there's the possibility that if we build on a system that
+    does not have getentropy then run on a system that does have it, then
+    OpenSSL could end up calling our getentropy and getting stuck in a loop.
+    Pointed out by deraadt@, ok djm@
 
-commit 5b054d76402faab38c48377efd112426469553a0
+commit 7a01f61be8d0aca0e975e7417f26371495fe7674
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Apr 1 13:16:47 2022 +1100
-
-    Skip slow tests on (very) slow test targets.
-
-commit b275818065b31a865142c48c2acf6a7c1655c542
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Mar 31 14:11:36 2022 +1100
+Date:   Mon Aug 8 12:17:04 2022 +1000
 
-    depend
+    Actually put HAVE_STDINT_H around the stdint.h.
 
-commit 3fa539c3ffaabd6211995512d33e29150f88c5c5
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Mar 31 03:07:03 2022 +0000
+commit 73541f29f0b50480da6c20dceb7a7191bd8ea7d3
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Aug 8 10:30:34 2022 +1000
 
-    upstream: add a sftp client "cp" command that supports server-side
-    
-    copying of files. Useful for this task and for testing the copy-data
-    extension. Patch from Mike Frysinger; ok dtucker@
+    Give unused param a name.
     
-    OpenBSD-Commit-ID: 1bb1b950af0d49f0d5425b1f267e197aa1b57444
+    Fixes builds on platforms that do have fido2 but don't have
+    fido_dev_is_winhello.
 
-commit 7988bfc4b701c4b3fe9b36c8561a3d1c5d4c9a74
+commit 2a108c0ea960381bd9b14ee0d84e818a23df4482
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Mar 31 03:05:49 2022 +0000
+Date:   Fri Aug 5 05:01:40 2022 +0000
 
-    upstream: add support for the "corp-data" protocol extension to
-    
-    allow server-side copies to be performed without having to go via the client.
-    Patch by Mike Frysinger, ok dtucker@
+    upstream: don't prompt for FIDO passphrase before attempting to enroll
     
-    OpenBSD-Commit-ID: 00aa510940fedd66dab1843b58682de4eb7156d5
-
-commit 32dc1c29a4ac9c592ddfef0a4895eb36c1f567ba
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 30 21:13:23 2022 +0000
-
-    upstream: select post-quantum KEX
+    the credential, just let the enroll operating fail and we'll attempt to get a
+    PIN anyway. Might avoid some unneccessary PIN prompts.
     
-    sntrup761x25519-sha512@openssh.com as the default; ok markus@
+    Part of GHPR#302 from Corinna Vinschen; ok dtucker@
     
-    OpenBSD-Commit-ID: f02d99cbfce22dffec2e2ab1b60905fbddf48fb9
+    OpenBSD-Commit-ID: bd5342ffc353ee37d39617906867c305564d1ce2
 
-commit d6556de1db0822c76ba2745cf5c097d9472adf7c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 30 21:10:25 2022 +0000
+commit 2886975c0ad9244e60dc5e4be34fde3aa573a4b5
+Author: Corinna Vinschen <vinschen@redhat.com>
+Date:   Fri Feb 11 14:33:41 2022 +0100
 
-    upstream: fix poll() spin when a channel's output fd closes without
+    sk_sign: set FIDO2 uv attribute explicitely for WinHello
     
-    data in the channel buffer. Introduce more exact packing of channel fds into
-    the pollfd array. fixes bz3405 and bz3411; ok deraadt@ markus@
+    WinHello via libfido2 performs user verification by default.
+    However, if we stick to that, there's no way to differentiate
+    between keys created with or without "-O  verify-required".
+    Set FIDO2 uv attribute explicitely to FIDO_OPT_FALSE, then check
+    if user verification has been requested.
     
-    OpenBSD-Commit-ID: 06740737849c9047785622ad5d472cb6a3907d10
+    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
 
-commit 8a74a96d25ca4d32fbf298f6c0ac5a148501777d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 30 04:33:09 2022 +0000
+commit 242c044ab111a37aad3b0775727c36a4c5f0102c
+Author: Corinna Vinschen <vinschen@redhat.com>
+Date:   Tue Feb 15 11:28:08 2022 +0100
 
-    upstream: ssh is almost out of getopt() characters; note the
+    check_sk_options: add temporary WinHello workaround
     
-    remaining remaining available ones in a comment
+    Up to libfido 1.10.0, WinHello advertises "clientPin" rather
+    than "uv" capability.  This is fixed in 1.11.0.  For the time
+    being, workaround it here.
     
-    OpenBSD-Commit-ID: 48d38cef59d6bc8e84c6c066f6d601875d3253fd
+    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
 
-commit 6d4fc51adb9d8a42f67b5474f02f877422379de6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Mar 30 04:27:51 2022 +0000
+commit 78774c08cc4b4997382975b0f414a86e06b6780c
+Author: Corinna Vinschen <vinschen@redhat.com>
+Date:   Thu Feb 10 18:19:29 2022 +0100
 
-    upstream: avoid NULL deref via ssh-keygen -Y find-principals.
-    
-    bz3409, reported by Mateusz Adamowski
+    compat code for fido_dev_is_winhello()
     
-    OpenBSD-Commit-ID: a3b2c02438052ee858e0ee18e5a288586b5df2c5
-
-commit e937514920335b92b543fd9be79cd6481d1eb0b6
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Mar 28 17:51:03 2022 +1100
-
-    Add AIX 5.1 test target.
+    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
 
-commit 4bbe815ba974b4fd89cc3fc3e3ef1be847a0befe
+commit 3d3a932a019aedfb891e0779bb4990cd5008a390
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 22:01:31 2022 +1100
+Date:   Fri Aug 5 13:12:27 2022 +1000
 
-    Drop leading "v" from release version identifier.
+    Factor out getrnd() and rename to getentropy().
     
-    It's present in the git tags but not in the release tarball names.
-    Also drop extra "/" from URL path.
+    Factor out the arc4random seeding into its own file and change the
+    interface to match getentropy.  Use native getentropy if available.
+    This will make it easier to resync OpenBSD changes to arc4random.
+    Prompted by bz#3467, ok djm@.
 
-commit f5cdd3b3c275dffaebfca91df782dca29975e9ac
+commit 9385d277b787403be9dfcb229cf372202496d2f3
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 16:28:04 2022 +1100
+Date:   Thu Aug 4 18:55:48 2022 +1000
 
-    Use tarballs when testing LibreSSL releases.
-    
-    This means they'll still work when the combination of -portable and
-    openbsd github repos no longer match.
+    Include CHANNEL and FIDO2 libs in configure output
 
-commit 24dc37d198f35a7cf71bf4d5384363c7ef4209d4
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 15:02:45 2022 +1100
+commit 141535b904b6fba01724444f38193a8599201f82
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Aug 1 11:09:26 2022 +0000
 
-    Remove now-unused passwd variable.
+    upstream: avoid double-free in error path introduced in r1.70; report
+    
+    and fix based on GHPR#332 by v-rzh ok dtucker@
+    
+    OpenBSD-Commit-ID: 3d21aa127b1f37cfc5bdc21461db369a663a951f
 
-commit 5b467ceef2c356f0a77f5e8ab4eb0fac367e4d24
+commit dba7099ffcba3ca07b3946f017ba6a4c3158d9b1
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 13:15:44 2022 +1100
+Date:   Wed Jul 27 18:40:12 2022 +1000
 
-    Missing semicolon.
+    Remove deprecated MacOS 10.15 runners.
 
-commit 2923d026e55998133c0f6e5186dca2a3c0fa5ff5
+commit 722a56439aa5972c830e4a9a724cf52aff4a950a
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 12:49:50 2022 +1100
+Date:   Wed Jul 27 18:31:14 2022 +1000
 
-    Factor out platform-specific locked account check.
+    Move stale-configure check as early as possible.
     
-    Also fixes an incorrect free on platforms with both libiaf and shadow
-    passwords (probably only Unixware).  Prompted by github PR#284,
-    originally from @c3h2_ctf and stoeckmann@.
+    We added a check in Makefile to catch the case where configure needs to
+    be rebuilt, however this did not happen until a build was attempted in
+    which case all of the work done by configure was wasted.  Move this check
+     to the start of configure to catch it as early as possible.  ok djm@
 
-commit d23efe4b12886ffe416be10bc0a7da6ca8aa72d1
+commit 099d6b56288b421ba38531d26dc1bd6bb685e311
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Mar 26 08:13:46 2022 +1100
-
-    Add OpenWRT mips and mipsel test targets.
-
-commit 16ea8b85838dd7a4dbeba4e51ac4f43fd68b1e5b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Mar 20 08:52:17 2022 +0000
+Date:   Fri Jul 22 10:47:19 2022 +1000
 
-    upstream: don't leak argument list; bz3404, reported by Balu
-    
-    Gajjala ok dtucker@
+    Move libcrypto into CHANNELLIBS.
     
-    OpenBSD-Commit-ID: fddc32d74e5dd5cff1a49ddd6297b0867eae56a6
+    This will result in sftp, sftp-server and scp no longer being linked
+    against libcrypto.  ok djm@
 
-commit a72bde294fe0518c9a44ba63864093a1ef2425e3
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Mar 20 08:51:21 2022 +0000
+commit 1bdf86725b77733bb5f17c54888b88a10b2f6538
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Jul 22 10:45:47 2022 +1000
 
-    upstream: make addargs() and replacearg() a little more robust and
-    
-    improve error reporting
-    
-    make freeargs(NULL) a noop like the other free functions
-    
-    ok dtucker as part of bz3403
+    Remove seed_rng calls from scp, sftp, sftp-server.
     
-    OpenBSD-Commit-ID: 15f86da83176978b4d1d288caa24c766dfa2983d
-
-commit 731087d2619fa7f01e675b23f57af10d745e8af2
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 18 04:04:11 2022 +0000
+    These binaries don't use OpenSSL's random functions.  The next step
+    will be to stop linking them against libcrypto.  ok djm@
 
-    upstream: don't try to resolve ListenAddress directives in the sshd
-    
-    re-exec path - we're never going to use the result and if the operation fails
-    then it can prevent connections from being accepted. Reported by Aaron
-    Poffenberger; with / ok dtucker@
+commit d73f77b8cb9b422f1ac4facee7890aa10ff2bc21
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Jul 22 09:51:51 2022 +1000
+
+    Group libcrypto and PRNGD checks together.
     
-    OpenBSD-Commit-ID: 44c53a43909a328e2f5ab26070fdef3594eded60
+    They're related more than the libcrypt or libiaf checks which are
+    currently between them.  ok djm@
 
-commit 1c83c082128694ddd11ac05fdf31d70312ff1763
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 18 02:50:21 2022 +0000
+commit f117e372b3f42f2fbdb0a578d063b2609ab58e1f
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Jul 22 09:24:45 2022 +1000
 
-    upstream: remove blank line
+    Do not link scp, sftp and sftp-server w/ zlib.
     
-    OpenBSD-Commit-ID: d5e0182965b2fbfb03ad5f256d1a1ce5706bcddf
+    Some of our binaries (eg sftp, sftp-server, scp) do not interact with
+    the channels code and thus do use libraries such as zlib and libcrypto
+    although they are linked with them.  This adds a CHANNELLIBS and starts
+    by moving zlib into it, which means the aformentioned binaries are no
+    longer linked against zlib.  ok djm@
 
-commit 807be68684da7a1fe969c399ddce2fafb7997dcb
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 18 02:32:22 2022 +0000
+commit 800c2483e68db38bd1566ff69677124be974aceb
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Jul 25 21:49:04 2022 +1000
 
-    upstream: helpful comment
+    Remove workarounds for OpenSSL missing AES-CTR.
     
-    OpenBSD-Commit-ID: e3315a45cb04e7feeb614d76ec80a9fe4ca0e8c7
+    We have some compatibility hacks that were added to support OpenSSL
+    versions that do not support AES CTR mode.  Since that time, however,
+    the minimum OpenSSL version that we support has moved to 1.0.1 which
+    *does* have CTR, so this is no longer needed.  ok djm@
 
-commit a0b5816f8f1f645acdf74f7bc11b34455ec30bac
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Mar 18 02:31:25 2022 +0000
+commit b7c56b65c12f51fe0dbae798d19c8f58224a5d95
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Jul 25 21:43:00 2022 +1000
 
-    upstream: ssh-keygen -Y check-novalidate requires namespace or SEGV
-    
-    will ensue. Patch from Mateusz Adamowski via GHPR#307
+    Remove workarounds for OpenSSL missing AES-GCM.
     
-    OpenBSD-Commit-ID: 99e8ec38f9feb38bce6de240335be34aedeba5fd
+    We have some compatibility hacks that were added to support OpenSSL
+    versions that do not support AES GCM mode.  Since that time, however,
+    the minimum OpenSSL version that we support has moved to 1.0.1 which
+    *does* have GCM, so this is no longer needed.  ok djm@
 
-commit 5a252d54a63be30d5ba4be76210942d754a531c0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Mar 15 05:27:37 2022 +0000
+commit 5a4a9f7a968fbf92cc1eac519c65638e79ae9f1f
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Jul 25 07:12:45 2022 +0000
 
-    upstream: improve DEBUG_CHANNEL_POLL debugging message
+    upstream: Restore missing "!" in TEST_SSH_ELAPSED_TIMES test.
     
-    OpenBSD-Commit-ID: 2275eb7bc4707d019b1a0194b9c92c0b78da848f
+    OpenBSD-Regress-ID: 38783f9676ec348c5a792caecee9a16e354b37b0
 
-commit ce324cf58ba2840e31afeb996935800780c8fa4b
-Author: cheloha@openbsd.org <cheloha@openbsd.org>
-Date:   Sun Mar 13 23:27:54 2022 +0000
+commit 0ff886be132299386cc29d87c2aa16ff68a1aa08
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Sun Jul 24 23:29:10 2022 +0000
 
-    upstream: ssh: xstrdup(): use memcpy(3)
-    
-    Copying the given string into the buffer with strlcpy(3) confers no
-    benefit in this context because we have already determined the
-    string's length with strlen(3) in order to allocate that buffer.
-    
-    Thread: https://marc.info/?l=openbsd-tech&m=164687525802691&w=2
+    upstream: Test TEST_SSH_ELAPSED_TIMES for empty string not
     
-    ok dtucker@ millert@
+    executable.  No-op on most platforms but should prevent warnings in -portable
+    on systems that don't have 'date %s'.
     
-    OpenBSD-Commit-ID: f8bfc082e36e2d2dc4e1feece02fe274155ca11a
+    OpenBSD-Regress-ID: e39d79867b8065e33d0c5926fa1a31f85659d2a4
 
-commit 2893c5e764557f48f9d6a929e224ed49c59545db
+commit f69319ad8ad1dd50f90bbcf5912e11cc8ed3e037
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Mar 11 18:43:58 2022 +1100
+Date:   Sat Jul 23 14:38:22 2022 +1000
 
-    Resync fmt_scaled. with OpenBSD.
+    Convert "have_prog" function into "which".
     
-    Fixes underflow reported in bz#3401.
+    "which" and its behaviour is not standardized, so convert the existing
+    have_prog function into "which" so we can rely on it being available
+    and what its semantics are.  Add a have_prog wrapper that maintains the
+    existing behaviour.
 
-commit 5ae31a0fdd27855af29f48ff027491629fff5979
+commit ea7ecc2c3ae39fdf5c6ad97b7bc0b47a98847f43
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Mar 9 09:41:56 2022 +1100
+Date:   Sat Jul 23 14:36:38 2022 +1000
 
-    Provide killpg implementation.
+    Skip scp3 test if there's no scp on remote path.
     
-    Based on github PR#301 for Tandem NonStop.
+    scp -3 ends up using the scp that's in the remote path and will fail if
+    one is not available.  Based on a patch from rapier at psc.edu.
 
-commit c41c84b439f4cd74d4fe44298a4b4037ddd7d2ae
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Mar 9 09:29:30 2022 +1100
+commit c46f6fed419167c1671e4227459e108036c760f8
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Jul 20 13:39:14 2022 +1000
 
-    Check for missing ftruncate prototype.
-    
-    From github PR#301 in conjunction with rsbeckerca.
+    crank SSH_SK_VERSION_MAJOR in sk-dummy.so
 
-commit 8cf5275452a950869cb90eeac7d220b01f77b12e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 8 20:04:06 2022 +1100
+commit f208e3b9ffb5ee76cf9c95df7ff967adc7f51c7d
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jul 20 03:33:22 2022 +0000
 
-    Default to not using sandbox when cross compiling.
+    upstream: ssh-keygen: fix touch prompt, pin retries;
     
-    On most systems poll(2) does not work when the number of FDs is reduced
-    with setrlimit, so assume it doesn't when cross compiling and we can't
-    run the test.  bz#3398.
+    part of GHPR329 from Pedro Martelletto
+    
+    OpenBSD-Commit-ID: 75d1005bd2ef8f29fa834c90d2684e73556fffe8
 
-commit 379b30120da53d7c84aa8299c26b18c51c2a0dac
+commit 8638a2ce7e90c8a51d9af3143404282126c524f8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Mar 1 01:59:19 2022 +0000
+Date:   Wed Jul 20 03:31:42 2022 +0000
 
-    upstream: pack pollfd array before server_accept_loop() ppoll()
-    
-    call, and terminate sshd if ppoll() returns errno==EINVAL
+    upstream: sk-usbhid: preserve error code returned by key_lookup()
     
-    avoids spin in ppoll when MaxStartups > RLIMIT_NOFILE, reported by
-    Daniel Micay
+    it conveys useful information, such as the supplied pin being wrong.
     
-    feedback/ok deraadt
+    Part of GHPR329 from Pedro Martelletto
     
-    OpenBSD-Commit-ID: dbab1c24993ac977ec24d83283b8b7528f7c2c15
+    OpenBSD-Commit-ID: c0647eb9290f793add363d81378439b273756c1b
 
-commit eceafbe0bdbbd9bd2f3cf024ccb350666a9934dd
-Author: naddy@openbsd.org <naddy@openbsd.org>
-Date:   Sun Feb 27 01:33:59 2022 +0000
+commit 9ab929ca2d820520327b41929372bcb9e261534c
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jul 20 03:29:14 2022 +0000
 
-    upstream: include rejected signature algorithm in error message and
+    upstream: when enrolling a resident key on a security token, check
     
-    not the (useless) key type; ok djm@
+    if a credential with matching application and user ID strings already exists.
+    if so, prompt the user for confirmation before overwriting the credential.
     
-    OpenBSD-Commit-ID: d0c0f552a4d9161203e07e95d58a76eb602a76ff
-
-commit f2f3269423618a83157e18902385e720f9776007
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 25 09:46:24 2022 +0000
-
-    upstream: Remove the char * casts from arguments to do_lstat,
+    patch from Pedro Martelletto via GHPR329
     
-    do_readdir and do_stat paths since the underlying functions now take a const
-    char *. Patch from vapier at gentoo.org.
+    NB. cranks SSH_SK_VERSION_MAJOR, so any third-party FIDO middleware
+    implementations will need to adjust
     
-    OpenBSD-Commit-ID: 9e4d964dbfb0ed683a2a2900711b88e7f1c0297b
+    OpenBSD-Commit-ID: e45e9f1bf2b2f32d9850669e7a8dbd64acc5fca4
 
-commit 4a66dac052c5ff5047161853f36904607649e4f9
+commit 5bcfc788b38d5b64e4c347bdc04bd9a01bbc36da
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Feb 25 02:09:27 2022 +0000
+Date:   Wed Jul 20 03:13:04 2022 +0000
 
-    upstream: save an unneccessary alloc/free, based on patch from
+    upstream: pull passphrase reading and confirmation into a separate
     
-    Martin Vahlensieck; ok dtucker@
+    function so it can be used for FIDO2 PINs; no functional change
     
-    OpenBSD-Commit-ID: 90ffbf1f837e509742f2c31a1fbf2c0fd376fd5f
-
-commit 6f117cb151efe138ac57bdd8e26165f350328f5f
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 1 09:02:06 2022 +1100
-
-    Remove unused ivbits argument from chacha_keysetup
-
-commit 15974235dd528aeab0ec67fb92a0a1d733f62be2
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Mar 1 09:00:20 2022 +1100
-
-    Add OPENBSD ORIGINAL marker.
+    OpenBSD-Commit-ID: bf34f76b8283cc1d3f54633e0d4f13613d87bb2f
 
-commit f2ff669347d320532e7c1b63cdf5c62f46e73150
+commit eb679e2959bdb15454eb94751930eb4c9110da94
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 28 22:21:36 2022 +1100
+Date:   Fri Jul 15 21:31:48 2022 +1000
 
-    No unused param warnings for clang-12 and gcc-11.
+    Move vmshutdown to first step.
     
-    These have too many false positives in -Werror tests on the github CI
-    since we often provide empty stub functions for functionality not needed
-    for particular configurations.
+    If a previous run on a physical runner has failed to clean up, the next
+    run will fail because it'll try to check out the code to a broken
+    directory mount.  Make cleanup the first step.
 
-commit 96558ecd87adac62efa9a2b5479f686ab86b0be1
+commit 46b91b70ff3cb9c147e2875ef5dc609fd64c0c96
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 26 14:10:41 2022 +1100
+Date:   Fri Jul 15 20:25:27 2022 +1000
 
-    Add debian-i386 test target.
+    Rename bbone test target to ARM.
 
-commit 284b6e5394652d519e31782e3b3cdfd7b21d1a81
+commit 751d22cdeffed9fe921db78eedc32a29f9e80510
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 26 14:06:14 2022 +1100
+Date:   Fri Jul 15 13:37:29 2022 +1000
 
-    Allow ppoll_time64 in seccomp sandbox.
+    Add AUDIT_ARCH_PPC to supported seccomp arches.
     
-    Should fix sandbox violations on (some? at least i386 and armhf) 32bit
-    Linux platforms.  Patch from chutzpahu at gentoo.org and cjwatson at
-    debian.org via bz#3396.
+    Patch from dries.deschout at dodeco.eu.
 
-commit 0132056efabc5edb85c3c7105d2fb6dee41843c6
+commit a061792a6e8d235fc40a9b5d4c22a1762bb75a7b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 25 19:47:48 2022 +1100
+Date:   Thu Jul 14 19:20:24 2022 +1000
 
-    Improve handling of _getshort and _getlong.
+    Remove unintended changes.
     
-    If the system native ones are exactly as required then use them,
-    otherwise use the local versions mapped to another name to prevent
-    name collisions.
+    I inadvertently included a couple of local changes with the OpenSSL
+    3.0.4 change.  Revert, anything that should be there will be committed
+    separately.
 
-commit 8e206e0dd6b9f757b07979e48f53ad5bf9b7b52b
+commit 527cb43fa1b4e55df661feabbac51b8e608b6519
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 25 15:14:22 2022 +1100
+Date:   Thu Jul 14 11:22:08 2022 +1000
 
-    Constify utimes in compat library to match specs.
+    Return ERANGE from getcwd() if buffer size is 1.
     
-    Patch from vapier at chromium.org.
+    If getcwd() is supplied a buffer size of exactly 1 and a path of "/", it
+    could result in a nul byte being written out of array bounds.  POSIX says
+    it should return ERANGE if the path will not fit in the available buffer
+    (with terminating nul). 1 byte cannot fit any possible path with its nul,
+    so immediately return ERANGE in that case.
+    
+    OpenSSH never uses getcwd() with this buffer size, and all current
+    (and even quite old) platforms that we are currently known to work
+    on have a native getcwd() so this code is not used on those anyway.
+    Reported by Qualys, ok djm@
 
-commit 1b2920e3b63db2eddebeec7330ffe8b723055573
+commit 36857fefd8849c4b0e877cfd9d1eb22f79b76650
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 25 13:50:56 2022 +1100
+Date:   Thu Jul 14 10:02:35 2022 +1000
 
-    ANSIfy getshort and getlong.
+    Split README.platform into its own line.
     
-    These functions appear to have come from OpenBSD's lib/libc/net/res_comp.c
-    which made this change in 2005.
+    README.platform has general platform-specific information, having it
+    following text about FIDO2 on the same line could imply that it only
+    has information about FIDO2.
 
-commit 54a86f4f6e1c43a2ca2be23ef799ab8910d4af70
+commit 00a496c6c14f2d41f2a9365714d494dd5f3aac9f
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 25 13:23:04 2022 +1100
+Date:   Thu Jul 14 09:56:01 2022 +1000
 
-    Use PICFLAG instead of hard coding -fPIC.
+    Clarify README.md text.
+    
+    Clarify the text about the implications of building without OpenSSL, and
+    prefix the "configure --help" example command with a "./" so it's likely
+    to work as-is in more shells.  From bz#3461.
 
-commit 3016ba47035ac3561aabd48e2be70167fe157d6a
+commit f40b52f21fbc52eb513279168a49d3285c65256c
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 25 11:37:11 2022 +1100
-
-    Add tests for latest releases of {Libre,Open}SSL.
-
-commit f107467179428a0e3ea9e4aa9738ac12ff02822d
-Author: Colin Watson <cjwatson@debian.org>
-Date:   Thu Feb 24 16:04:18 2022 +0000
+Date:   Tue Jul 12 19:48:44 2022 +1000
 
-    Improve detection of -fzero-call-used-regs=all support
+    Remove special casing of crypt().
+    
+    Configure goes to some lengths to pick crypt() from either libcrypt
+    or OpenSSL's libcrypto because they can more or less featureful (eg
+    supporting md5-style passwords).
     
-    GCC doesn't tell us whether this option is supported unless it runs into
-    the situation where it would need to emit corresponding code.
+    OpenSSL removed its crypt() interface in 2002:
+    https://github.com/openssl/openssl/commit/69deec58 so these hijinks
+    should no longer be necessary.  This also only links sshd with libcrypt
+    which is the only thing that needs it.  ok djm@
 
-commit 3383b2cac0e9275bc93c4b4760e6e048f537e1d6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 21:21:49 2022 +0000
+commit 76f4e48631d7b09fb243b47d7b393d100d3741b7
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Jul 13 13:17:47 2022 +1000
 
-    upstream: free(3) wants stdlib.h
+    Only refuse to use OpenSSL 3.0.4 on x86_64.
     
-    OpenBSD-Commit-ID: 227a8c70a95b4428c49e46863c9ef4bd318a3b8a
+    The potential RCE only impacts x86_64, so only refuse to use it if we're
+    targetting a potentially impacted architecture.  ok djm@
 
-commit a4537e79ab4ac6db4493c5158744b9ebde5efcb0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 21:21:16 2022 +0000
+commit e75bbc1d88491fa85e61b2cc8783d4bbd00cd131
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 12 14:37:15 2022 +1000
 
-    upstream: put back the scp manpage changes for SFTP mode too
-    
-    OpenBSD-Commit-ID: 05dc53921f927e1b5e5694e1f3aa314549f2e768
+    Capture stderr output from configure.
 
-commit 449bcb8403adfb9724805d02a51aea76046de185
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Wed Feb 23 19:01:00 2022 +0000
+commit d9eaea4bea6271bcee6a2b9428f1271faf2d033b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 12 12:54:49 2022 +1000
 
-    upstream: and we go back to testing sftp-scp after the 8.9
-    
-    release...
+    Refuse to use OpenSSL 3.0.4 due to potential RCE.
     
-    OpenBSD-Commit-ID: a80440168258adca543a4607b871327a279c569c
+    OpenSSL has a potential RCE in its RSA implementation (CVE-2022-2274)
+    so refuse to use that specific version.
 
-commit 166456cedad3962b83b848b1e9caf80794831f0f
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Feb 23 22:31:11 2022 +1100
+commit fb2f3a61bf3d28fff285524535f7ffcd177c9235
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 12 12:54:24 2022 +1000
 
-    makedepend
+    Move unset to before we set anything.
 
-commit 32ebaa0dbca5d0bb86e384e72bebc153f48413e4
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 11:18:13 2022 +0000
+commit c483a5c0fb8e8b8915fad85c5f6113386a4341ca
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Wed Jul 6 11:52:54 2022 +1000
 
-    upstream: avoid integer overflow of auth attempts (harmless, caught
-    
-    by monitor)
-    
-    OpenBSD-Commit-ID: 488ad570b003b21e0cd9e7a00349cfc1003b4d86
+    Test against openssl-3.0.5.
 
-commit 6e0258c64c901753df695e06498b26f9f4812ea6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 11:17:10 2022 +0000
+commit 669a56bcfe73f8b985f2bba476ba834d55253acf
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 5 18:35:53 2022 +1000
 
-    upstream: randomise the password used in fakepw
+    Update sanitizer test targets:
     
-    OpenBSD-Commit-ID: 34e159f73b1fbf0a924a9c042d8d61edde293947
+     - remove clang-sanitize-memory for now.  It takes so long that the test
+       times out.
+     - add gcc sanitize-address and sanitize-undefined test targets.
 
-commit bf114d6f0a9df0b8369823d9a0daa6c72b0c4cc9
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 11:15:57 2022 +0000
+commit 48cc68b69118b3ce8d07fd4f82e00d58667d5379
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 5 16:23:28 2022 +1000
 
-    upstream: use asprintf to construct .rhosts paths
-    
-    OpenBSD-Commit-ID: 8286e8d3d2c6ff916ff13d041d1713073f738a8b
+    Add GCC address sanitizer build/test.
 
-commit c07e154fbdc7285e9ec54e78d8a31f7325d43537
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Feb 23 11:07:09 2022 +0000
+commit 55c60bdd39b82457e92efa77da8d16cfa6a49391
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Jul 5 12:02:33 2022 +1000
 
-    upstream: openssh-8.9
-    
-    OpenBSD-Commit-ID: 5c5f791c87c483cdab6d9266b43acdd9ca7bde0e
+    Move sanitizer logs into regress for collection.
 
-commit bc16667b4a1c3cad7029304853c143a32ae04bd4
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 22 15:29:22 2022 +1100
+commit 35ef2b3b6ef198f8574904a45780487ec2f17858
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon Jul 4 09:10:31 2022 +0000
 
-    Extend select+rlimit sanbox test to include poll.
+    upstream: Add TEST_REGRESS_CACHE_DIR.
     
-    POSIX specifies that poll() shall fail if "nfds argument is greater
-    than {OPEN_MAX}".  The setrlimit sandbox sets this to effectively zero
-    so this causes poll() to fail in the preauth privsep process.
+    If set, it is used to cache regress test names that have succeeded and
+    skip those on a re-run.
     
-    This is likely the underlying cause for the previously observed similar
-    behaviour of select() on plaforms where it is implement in userspace on
-    top of poll().
+    OpenBSD-Regress-ID: a7570dd29a58df59f2cca647c3c2ec989b49f247
 
-commit 6520c488de95366be031d49287ed243620399e23
+commit 7394ed80c4de8b228a43c8956cf2fa1b9c6b2622
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 22 13:08:59 2022 +1100
+Date:   Sun Jul 3 21:46:44 2022 +1000
 
-    Add Alpine Linux test VM.
+    Add clang sanitizer tests.
 
-commit a4b325a3fc82d11e0f5d61f62e7fde29415f7afb
+commit bfce0e66b6017a9bfab450b9dc7d4b16f90de817
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 22 12:27:07 2022 +1100
+Date:   Sun Jul 3 18:14:09 2022 +1000
 
-    Include sys/param.h if present.
+    Skip all rlimit tests when sandboxing disabled.
     
-    Needed for howmany() on MUSL systems such as Alpine.
+    The rlimit tests can hang when being run with some compiler sanitizers
+    so skip all of them if sandbox=no.
 
-commit 5a102e9cb287a43bd7dfe594b775a89a8e94697c
+commit 6208d611520f9ea94d5369f9da404b709930029d
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Feb 22 12:25:52 2022 +1100
+Date:   Sun Jul 3 17:54:49 2022 +1000
 
-    Only include sys/poll.h if we don't have poll.h.
+    Move checks for pollfd.fd and nfds_t.
     
-    Prevents warnings on MUSL based systems such as Alpine.
+    Move the checks for struct pollfd.fd and nfds_t to before the sandboxing
+    checks.  This groups all the sandbox checks together so we can skip them
+    all when sandboxing is disabled.
 
-commit 7c0d4ce911d5c58b6166b2db754a4e91f352adf5
-Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Feb 22 11:14:51 2022 +1100
+commit 322964f8f2e9c321e77ebae1e4d2cd0ccc5c5a0b
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jul 1 05:08:23 2022 +0000
 
-    disable agent-restrict test on minix3
-    
-    Minix seems to have a platform-wide limit on the number of
-    select(2) syscalls that can be concurrently issued. This test
-    seems to exceed this limit.
+    upstream: Remove leftover line.
     
-    Refer to:
+    Remove extra line leftover from merge conflict. ok djm@
     
-    https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/R3.3.0/minix/servers/vfs/select.c#L114
-    https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/R3.3.0/minix/servers/vfs/select.c#L30-L31
-
-commit 81d33d8e3cf7ea5ce3a5653c6102b623e019428a
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 21 21:27:20 2022 +1100
-
-    Skip agent-getpeereid when running as root.
+    OpenBSD-Commit-ID: 460e2290875d7ae64971a7e669c244b1d1c0ae2e
 
-commit fbd772570a25436a33924d91c164d2b24021f010
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Feb 20 03:47:26 2022 +0000
+commit 7ec81daad0e03a64e8d91c5590960c48c1a899a3
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jul 1 04:45:50 2022 +0000
 
-    upstream: Aproximate realpath on the expected output by deduping
+    upstream: use consistent field names (s/char/byte)
     
-    leading slashes. Fixes test failure when user's home dir is / which is
-    possible in some portable configurations.
+    in format description
     
-    OpenBSD-Regress-ID: 53b8c53734f8893806961475c7106397f98d9f63
+    OpenBSD-Commit-ID: 3de33572733ee7fcfd7db33d37db23d2280254f0
 
-commit 336685d223a59f893faeedf0a562e053fd84058e
+commit 32e82a392d9f263485effdd606ff5862d289a4a0
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Feb 20 13:30:52 2022 +1100
+Date:   Fri Jul 1 13:55:19 2022 +1000
 
-    Really move DSA to end of list.
+    Skip select+rlimit check if sandboxing is disabled
     
-    In commit ad16a84e syncing from OpenBSD, RSA was accidentally moved to
-    the end of the list instead of DSA.  Spotted by andrew at fyfe.gb.net.
-
-commit 63bf4f49ed2fdf2da6f97136c9df0c8168546eb3
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 18 12:12:21 2022 +1100
-
-    Add test configs for MUSL C library.
-
-commit f7fc6a43f1173e8b2c38770bf6cee485a562d03b
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Feb 17 22:54:19 2022 +1100
-
-    minix needs BROKEN_POLL too; chokes on /dev/null
+    It's not needed in that case, and the test can fail when being built
+    with some compiler memory sanitizer flags.  bz#3441
 
-commit 667fec5d4fe4406745750a32f69b5d2e1a75e94b
+commit 4be7184ebe2a2ccef175983517a35ee06766e1b4
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Feb 17 10:58:27 2022 +0000
+Date:   Fri Jul 1 03:52:57 2022 +0000
 
-    upstream: check for EINTR/EAGAIN failures in the rfd fast-path; caught
+    upstream: bump up loglevel from debug to info when unable to open
     
-    by dtucker's minix3 vm :) ok dtucker@
+    authorized keys/principals file for errno != ENOENT; bz2042 ok dtucker
     
-    OpenBSD-Commit-ID: 2e2c895a3e82ef347aa6694394a76a438be91361
-
-commit 41417dbda9fb55a0af49a8236e3ef9d50d862644
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Feb 17 22:05:29 2022 +1100
-
-    Comment hurd test, the VM is currently broken.
+    OpenBSD-Commit-ID: e79aa550d91ade6a80f081bda689da24c086d66b
 
-commit b2aee35a1f0dc798339b3fcf96136da71b7e3f6d
-Author: Damien Miller <djm@mindrot.org>
-Date:   Thu Feb 17 21:15:16 2022 +1100
+commit 6c31ba10e97b6953c4f325f526f3e846dfea647a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jul 1 03:39:44 2022 +0000
 
-    find sk-dummy.so when build_dir != src_dir
+    upstream: Don't leak the strings allocated by order_hostkeyalgs()
+    
+    and list_hostkey_types() that are passed to compat_pkalg_proposal(). Part of
+    github PR#324 from ZoltanFridrich, ok djm@
+    
+    This is a roll-forward of the previous rollback now that the required
+    changes in compat.c have been done.
     
-    spotted by Corinna Vinschen; feedback & ok dtucker@
+    OpenBSD-Commit-ID: c7cd93730b3b9f53cdad3ae32462922834ef73eb
 
-commit 62a2d4e50b2e89f2ef04576931895d5139a5d037
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Feb 16 16:26:17 2022 +1100
+commit 486c4dc3b83b4b67d663fb0fa62bc24138ec3946
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jul 1 03:35:45 2022 +0000
 
-    update versions in preparation for 8.9 release
+    upstream: Always return allocated strings from the kex filtering so
+    
+    that we can free them later.  Fix one leak in compat_kex_proposal.  Based on
+    github PR#324 from ZoltanFridrich with some simplications by me. ok djm@
+    
+    OpenBSD-Commit-ID: 9171616da3307612d0ede086fd511142f91246e4
 
-commit dd6d3dded721ac653ea73c017325e5bfeeec837f
+commit 96faa0de6c673a2ce84736eba37fc9fb723d9e5c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Feb 15 05:13:36 2022 +0000
+Date:   Fri Jul 1 00:36:30 2022 +0000
 
-    upstream: document the unbound/host-bound options to
+    upstream: ignore SIGPIPE earlier in main(), specifically before
     
-    PubkeyAuthentication; spotted by HARUYAMA Seigo
+    muxclient() which performs operations that could cause one; Reported by Noam
+    Lewis via bz3454, ok dtucker@
     
-    OpenBSD-Commit-ID: 298f681b66a9ecd498f0700082c7a6c46e948981
+    OpenBSD-Commit-ID: 63d8e13276869eebac6d7a05d5a96307f9026e47
 
-commit df93529dd727fdf2fb290700cd4f1adb0c3c084b
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Feb 14 14:19:40 2022 +1100
+commit 33efac790f6b09d54894ba6c3e17dfb08b6fc7e1
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Tue Jun 28 06:09:14 2022 +0000
 
-    Test if sshd accidentally acquires controlling tty
+    upstream: reflect the update to -D arg name in usage();
     
-    When SSHD_ACQUIRES_CTTY is defined, test for the problematic behaviour
-    in the STREAMS code before activating the workaround.  ok djm@
+    OpenBSD-Commit-ID: abdcde4f92b1ef094ae44210ee99d3b0155aad9c
 
-commit 766176cfdbfd7ec38bb6118dde6e4daa0df34888
+commit c71a1442d02f0a3586109dfe2cb366de36dee08e
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Feb 12 10:24:56 2022 +1100
+Date:   Wed Jun 29 18:28:47 2022 +1000
 
-    Add cygwin-release test config.
-    
-    This tests the flags used to build the cygwin release binaries.
+    Update OpenSSL tests to the most recent releases.
 
-commit b30698662b862f5397116d23688aac0764e0886e
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 11 21:00:35 2022 +1100
+commit 2a822f29300b2de7335fbff65f0b187a0c582304
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Mon Jun 27 21:41:55 2022 +0000
 
-    Move SSHD_ACQUIRES_CTTY workaround into compat.
-    
-    On some (most? all?) SysV based systems with STREAMS based ptys,
-    sshd could acquire a controlling terminal during pty setup when
-    it pushed the "ptem" module, due to what is probably a bug in
-    the STREAMS driver that's old enough to vote.  Because it was the
-    privileged sshd's controlling terminal, it was not available for
-    the user's session, which ended up without one.  This is known to
-    affect at least Solaris <=10, derivatives such as OpenIndiana and
-    several other SysV systems.  See bz#245 for the backstory.
-    
-    In the we past worked around that by not calling setsid in the
-    privileged sshd child, which meant it was not a session or process
-    group leader.  This solved controlling terminal problem because sshd
-    was not eligble to acquire one, but had other side effects such as
-    not cleaning up helper subprocesses in the SIGALRM handler since it
-    was not PG leader.  Recent cleanups in the signal handler uncovered
-    this, resulting in the LoginGraceTime timer not cleaning up privsep
-    unprivileged processes.
-    
-    This change moves the workaround into the STREAMS pty allocation code,
-    by allocating a sacrificial pty to act as sshd's controlling terminal
-    before allocating user ptys, so those are still available for users'
-    sessions.
-    
-    On the down side:
-     - this will waste a pty per ssh connection on affected platforms.
-    
-    On the up side:
-     - it makes the process group behaviour consistent between platforms.
-    
-     - it puts the workaround nearest the code that actually causes the
-       problem and competely out of the mainline code.
+    upstream: allow arguments to sftp -D option, e.g. sftp -D
     
-     - the workaround is only activated if you use the STREAMS code.  If,
-       say, Solaris 11 has the bug but also a working openpty() it doesn't
-       matter that we defined SSHD_ACQUIRES_CTTY.
+    "/usr/libexec/sftp-server -el debug3"
     
-     - the workaround is only activated when the fist pty is allocated,
-       ie in the post-auth privsep monitor.  This means there's no risk
-       of fd leaks to the unprivileged processes, and there's no effect on
-       sessions that do not allocate a pty.
+    ok markus@
     
-    Based on analysis and work by djm@, ok djm@
+    OpenBSD-Commit-ID: 5a002b9f3a7aef2731fc0ffa9c921cf15f38ecce
 
-commit cd00b48cf10f3565936a418c1e6d7e48b5c36140
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 11 20:09:32 2022 +1100
+commit 2369a2810187e08f2af5d58b343956062fb96ee8
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jun 24 10:45:06 2022 +0000
 
-    Simplify handling of --with-ssl-dir.
+    upstream: Roll back previous KEX changes as they aren't safe until
     
-    ok djm@
-
-commit ea13fc830fc0e0dce2459f1fab2ec5099f73bdf0
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 11 13:39:29 2022 +1100
-
-    Stop testing OpenBSD HEAD on 6.9 and 7.0.
+    compat_pkalg_proposal and friends always allocate their returned strings.
+    Reported by Qualys.
     
-    HEAD is not guaranteed to work on previous stable branches, and at the
-    moment is broken due to libfido API changes.
+    OpenBSD-Commit-ID: 1c7a88a0d5033f42f88ab9bec58ef1cf72c81ad0
 
-commit 50b9e4a4514697ffb9592200e722de6b427cb9ff
+commit 646686136c34c2dbf6a01296dfaa9ebee029386d
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 11 00:43:56 2022 +0000
+Date:   Fri Jun 24 04:37:00 2022 +0000
 
-    upstream: Always initialize delim before passing to hpdelim2 which
+    upstream: Don't leak the strings allocated by order_hostkeyalgs()
     
-    might not set it. Found by the Valgrind tests on github, ok deraadt@
+    and list_hostkey_types() that are passed to compat_pkalg_proposal(). Part of
+    github PR#324 from ZoltanFridrich, ok djm@
     
-    OpenBSD-Commit-ID: c830c0db185ca43beff3f41c19943c724b4f636d
+    OpenBSD-Commit-ID: b2f6e5f60f2bba293b831654328a8a0035ef4a1b
 
-commit 6ee53064f476cf163acd5521da45b11b7c57321b
+commit 193c6d8d905dde836b628fc07a7b9cf2d347e2a3
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Feb 11 10:03:06 2022 +1100
+Date:   Sat Jun 25 12:16:15 2022 +1000
 
-    Fix helper include path and remove excess code.
+    Zero out LIBFIDO2 when SK support not usable.
     
-    Looks like test_hpdelim.c was imported twice into the same file.
-    Spotted by kevin.brott at gmail com and chris at cataclysmal org.
+    Prevents us from trying to link them into ssh-sk-helper and failing to
+    build.
 
-commit 9fa63a19f68bc87452d3cf5c577cafad2921b7a4
+commit 40f5d849d25c60b4ae21261e78484d435f5cfd51
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Feb 10 23:27:02 2022 +1100
+Date:   Sat Jun 25 11:47:28 2022 +1000
 
-    Put poll.h inside ifdef.
+    Disable SK support if FIDO libs not found.
 
-commit 3ac00dfeb54b252c15dcbf1971582e9e3b946de6
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Feb 10 22:17:31 2022 +1100
+commit 5fd922ade1b25880fe8a8249f5c0385e413108f9
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Jun 24 14:43:54 2022 +1000
 
-    We now support POLLPRI so actually define it.
+    fix broken case statement in previous
 
-commit 25bd659cc72268f2858c5415740c442ee950049f
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sun Feb 6 22:58:33 2022 +0000
+commit f51423bdaf0008d46b6af082bcfd7a22a87375f0
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Jun 24 14:40:42 2022 +1000
 
-    upstream: Add test for empty hostname with port.
+    request 1.1x API compatibility for OpenSSL >=3.x
     
-    OpenBSD-Regress-ID: e19e89d3c432b68997667efea44cf015bbe2a7e3
+    idea/patch from Pedro Martelletto via GHPR#322; ok dtucker@
 
-commit a29af853cff41c0635f0378c00fe91bf9c91dea4
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 4 07:53:44 2022 +0000
+commit 455cee8d6c2e4c48c5af9faead3599c49948411e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jun 24 04:27:14 2022 +0000
 
-    upstream: Add unit tests for hpdelim.
+    upstream: make it clear that RekeyLimit applies to both transmitted
     
-    OpenBSD-Regress-ID: be97b85c19895e6a1ce13c639765a3b48fd95018
+    and received data. GHPR#328 from Jan Pazdziora
+    
+    OpenBSD-Commit-ID: d180a905fec9ff418a75c07bb96ea41c9308c3f9
 
-commit 9699151b039ecc5fad9ac6c6c02e9afdbd26f15f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Feb 10 04:12:38 2022 +0000
+commit 17904f05802988d0bb9ed3c8d1d37411e8f459c3
+Author: tobhe@openbsd.org <tobhe@openbsd.org>
+Date:   Tue Jun 21 14:52:13 2022 +0000
 
-    upstream: revert for imminent OpenSSH release, which wil ship with
-    
-    scp in RCP mode.
+    upstream: Make sure not to fclose() the same fd twice in case of an
     
-    > revision 1.106
-    > date: 2021/10/15 14:46:46;  author: deraadt;  state: Exp;  lines: +13 -9;  commitid: w5n9B2RE38tFfggl;
-    > openbsd 7.0 release shipped with the (hopefully last) scp that uses RCP
-    > protocol for copying.  Let's get back to testing the SFTP protocol.
+    error.
     
-    This will be put back once the OpenSSH release is done.
+    ok dtucker@
     
-    OpenBSD-Commit-ID: 0c725481a78210aceecff1537322c0b2df03e768
+    OpenBSD-Commit-ID: e384c4e05d5521e7866b3d53ca59acd2a86eef99
 
-commit 45279abceb37c3cbfac8ba36dde8b2c8cdd63d32
+commit f29d6cf98c25bf044079032d22c1a57c63ab9d8e
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Feb 8 08:59:12 2022 +0000
+Date:   Sat Jun 18 02:17:16 2022 +0000
 
-    upstream: Switch hpdelim interface to accept only ":" as delimiter.
+    upstream: Don't attempt to fprintf a null identity comment. From
     
-    Historicallly, hpdelim accepted ":" or "/" as a port delimiter between
-    hosts (or addresses) and ports.  These days most of the uses for "/"
-    are no longer accepted, so there are several places where it checks the
-    delimiter to disallow it.  Make hpdelim accept only ":" and use hpdelim2
-    in the other cases.  ok djm@
+    Martin Vahlensieck via tech@.
     
-    OpenBSD-Commit-ID: 7e6420bd1be87590b6840973f5ad5305804e3102
+    OpenBSD-Commit-ID: 4c54d20a8e8e4e9912c38a7b4ef5bfc5ca2e05c2
 
-commit a1bcbf04a7c2d81944141db7ecd0ba292d175a66
-Author: pedro martelletto <pedro@yubico.com>
-Date:   Mon Feb 7 09:09:59 2022 +0100
+commit ad1762173bb38716a106e8979806149fd0f2753e
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jun 17 01:00:03 2022 +0000
 
-    fix typos in previous
+    upstream: Log an error if pipe() fails while accepting a
+    
+    connection.  bz#3447, from vincent-openssh at vinc17 net, ok djm@
+    
+    OpenBSD-Commit-ID: 9d59f19872b94900a5c79da2d57850241ac5df94
 
-commit 56192518e329b39f063487bc2dc4d796f791eca0
+commit 9c59e7486cc8691401228b43b96a3edbb06e0412
 Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Feb 7 12:53:47 2022 +1100
-
-    compat code for fido_assert_set_clientdata()
-
-commit d6b5aa08fdcf9b527f8b8f932432941d5b76b7ab
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Feb 7 01:25:12 2022 +0000
+Date:   Fri Jun 24 14:20:43 2022 +1000
 
-    upstream: use libfido2 1.8.0+ fido_assert_set_clientdata() instead
+    automatically enable built-in FIDO support
     
-    of manually hashing data outselves. Saves a fair bit of code and makes life
-    easier for some -portable platforms.
+    If libfido2 is found and usable, then enable the built-in
+    security key support unless --without-security-key-builtin
+    was requested.
     
-    OpenBSD-Commit-ID: 351dfaaa5ab1ee928c0e623041fca28078cff0e0
+    ok dtucker@
 
-commit 86cc93fd3c26b2e0c7663c6394995fb04ebfbf3b
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Sun Feb 6 00:29:03 2022 +0000
+commit 7d25b37fb2a5ff4dadabcbdac6087a97479434f5
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Jun 24 13:46:39 2022 +1000
 
-    upstream: remove please from manual pages ok jmc@ sthen@ millert@
+    fix possible NULL deref when built without FIDO
     
-    OpenBSD-Commit-ID: 6543acb00f4f38a23472538e1685c013ca1a99aa
+    Analysis/fix from kircher in bz3443; ok dtucker@
 
-commit ad16a84e64a8cf1c69c63de3fb9008320a37009c
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Feb 4 02:49:17 2022 +0000
+commit f5ba85daddfc2da6a8dab6038269e02c0695be44
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed Jun 15 16:08:25 2022 +0000
 
-    upstream: Since they are deprecated, move DSA to the end of the
+    upstream: make sure that UseDNS hostname lookup happens in the monitor
     
-    default list of public keys so that they will be tried last.  From github
-    PR#295 from "ProBackup-nl", ok djm@
+    and not in the pledge(2)'d unprivileged process; fixes regression caused by
+    recent refactoring spotted by henning@
     
-    OpenBSD-Commit-ID: 7e5d575cf4971d4e2de92e0b6d6efaba53598bf0
+    OpenBSD-Commit-ID: a089870b95101cd8881a2dff65b2f1627d13e88d
 
-commit 253de42753de85dde266e061b6fec12ca6589f7d
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Feb 2 16:52:07 2022 +1100
+commit acb2059febaddd71ee06c2ebf63dcf211d9ab9f2
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jun 3 04:47:21 2022 +0000
 
-    portable-specific string array constification
+    upstream: move auth_openprincipals() and auth_openkeyfile() over to
+    
+    auth2-pubkeyfile.c too; they make more sense there.
     
-    from Mike Frysinger
+    OpenBSD-Commit-ID: 9970d99f900e1117fdaab13e9e910a621b7c60ee
 
-commit dfdcc2220cf359c492d5d34eb723370e8bd8a19e
+commit 3d9b0845f34510111cc693bb99a667662ca50cd8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Feb 1 23:37:15 2022 +0000
+Date:   Fri Jun 3 04:31:54 2022 +0000
 
-    upstream: test 'ssh-keygen -Y find-principals' with wildcard
+    upstream: test setenv in both client and server, test first-match-wins
     
-    principals; from Fabian Stelzer
+    too
     
-    OpenBSD-Regress-ID: fbe4da5f0032e7ab496527a5bf0010fd700f8f40
+    OpenBSD-Regress-ID: 4c8804f9db38a02db480b9923317457b377fe34b
 
-commit 968e508967ef42480cebad8cf3172465883baa77
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Fri Jan 21 02:54:41 2022 +0000
+commit 22e1a3a71ad6d108ff0c5f07f93c3fcbd30f8b40
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Jun 3 04:30:46 2022 +0000
 
-    upstream: Enable all supported ciphers and macs in the server
+    upstream: Make SetEnv directives first-match-wins in both
+    
+    sshd_config and sshd_config; previously if the same name was reused then the
+    last would win (which is the opposite to how the config is supposed to work).
+    
+    While there, make the ssh_config parsing more like sshd_config.
     
-    before trying to benchmark them.  Increase the data file size to get more
-    signal.
+    bz3438, ok dtucker
     
-    OpenBSD-Regress-ID: dc3697d9f7defdfc51c608782c8e750128e46eb6
+    OpenBSD-Commit-ID: 797909c1e0262c0d00e09280459d7ab00f18273b
 
-commit 15b7199a1fd37eff4c695e09d573f3db9f4274b7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Feb 1 23:34:47 2022 +0000
+commit 38ed6c57e9e592c08e020fa6e82b45b4e1040970
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jun 3 04:00:15 2022 +0000
 
-    upstream: allow 'ssh-keygen -Y find-principals' to match wildcard
+    upstream: Add missing *-sk types to ssh-keyscan manpage. From
     
-    principals in allowed_signers files; from Fabian Stelzer
+    skazi0 via github PR#294.
     
-    OpenBSD-Commit-ID: 1e970b9c025b80717dddff5018fe5e6f470c5098
+    OpenBSD-Commit-ID: fda2c869cdb871f3c90a89fb3f985370bb5d25c0
 
-commit 541667fe6dc26d7881e55f0bb3a4baa6f3171645
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Feb 1 23:32:51 2022 +0000
+commit ea97ec98c41ec2b755dfab459347db674ff9a5de
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jun 3 03:21:09 2022 +0000
 
-    upstream: mark const string array contents const too, i.e. static
+    upstream: Add period at end of "not known by any other names"
     
-    const char *array => static const char * const array from Mike Frysinger
+    message.  github PR#320 from jschauma, ok djm@
     
-    OpenBSD-Commit-ID: a664e31ea6a795d7c81153274a5f47b22bdc9bc1
+    OpenBSD-Commit-ID: bd60809803c4bfd3ebb7c5c4d918b10e275266f2
 
-commit 8cfa73f8a2bde4c98773f33f974c650bdb40dd3c
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Feb 1 23:11:11 2022 +0000
+commit 88e376fcd67478ad1660d94bc73ab348ac9f4527
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Jun 3 03:17:42 2022 +0000
 
-    upstream: better match legacy scp behaviour: show un-expanded paths
+    upstream: ssh-keygen -A: do not generate DSA keys by default.
     
-    in error messages. Spotted by and ok tb@
+    Based on github PR#303 from jsegitz with man page text from jmc@, ok markus@
+    djm@
     
-    OpenBSD-Commit-ID: 866c8ffac5bd7d38ecbfc3357c8adfa58af637b7
+    OpenBSD-Commit-ID: 5c4c57bdd7063ff03381cfb6696659dd3f9f5b9f
 
-commit 4e62c13ab419b4b224c8bc6a761e91fcf048012d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Feb 1 07:57:32 2022 +0000
+commit 6b3fb624675082a1e5aa615d1b8479873d8b5731
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Tue May 31 14:05:12 2022 +0000
 
-    upstream: Remove explicit kill of privsep preauth child's PID in
+    upstream: ssh-keygen: implement "verify-required" certificate option.
+    
+    This was already documented when support for user-verified FIDO
+    keys was added, but the ssh-keygen(1) code was missing.
     
-    SIGALRM handler. It's no longer needed since the child will get terminated by
-    the SIGTERM to the process group that cleans up any auth helpers, it
-    simplifies the signal handler and removes the risk of a race when updating
-    the PID. Based on analysis by HerrSpace in github PR#289, ok djm@
+    ok djm@
     
-    OpenBSD-Commit-ID: 2be1ffa28b4051ad9e33bb4371e2ec8a31d6d663
+    OpenBSD-Commit-ID: f660f973391b593fea4b7b25913c9a15c3eb8a06
 
-commit 2a7ccd2ec4022917b745af7186f514f365b7ebe9
-Author: guenther@openbsd.org <guenther@openbsd.org>
-Date:   Fri Jan 28 06:18:42 2022 +0000
+commit b7f86ffc301be105bba9a3e0618b6fab3ae379bd
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Sat May 28 05:57:56 2022 +0000
 
-    upstream: When it's the possessive of 'it', it's spelled "its",
+    upstream: keywords ref ssh_config.5;
     
-    without the apostrophe.
+    from caspar schutijser
     
-    OpenBSD-Commit-ID: fb6ab9c65bd31de831da1eb4631ddac018c5fae7
+    OpenBSD-Commit-ID: f146a19d7d5c9374c3b9c520da43b2732d7d1a4e
 
-commit 8a0848cdd3b25c049332cd56034186b7853ae754
-Author: Alex James <theracermaster@gmail.com>
-Date:   Sun Jan 30 16:13:36 2022 -0600
+commit dc7bc52372f2744fa39191577be5306ee57aacd4
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon May 30 09:29:09 2022 +1000
 
-    sandbox-seccomp-filter: allow gettid
-    
-    Some allocators (such as Scudo) use gettid while tracing allocations [1].
-    Allow gettid in preauth to prevent sshd from crashing with Scudo.
-    
-    [1]: https://github.com/llvm/llvm-project/blob/llvmorg-13.0.0/compiler-rt/lib/gwp_asan/common.cpp#L46
+    fix some bugs in the fuzzer
 
-commit b30d32159dc3c7052f4bfdf36357996c905af739
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 22 00:49:34 2022 +0000
+commit 1781f507c113667613351c19898efaf1e311a865
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri May 27 18:19:48 2022 +1000
 
-    upstream: add a ssh_packet_process_read() function that reads from
-    
-    a fd directly into the transport input buffer.
-    
-    Use this in the client and server mainloops to avoid unnecessary
-    copying. It also lets us use a more greedy read size without penalty.
-    
-    Yields a 2-3% performance gain on cipher-speed.sh (in a fairly
-    unscientific test tbf)
-    
-    feedback dtucker@ ok markus@
-    
-    OpenBSD-Commit-ID: df4112125bf79d8e38e79a77113e1b373078e632
+    Test against OpenSSL 1.1.1o and 3.0.3.
 
-commit a1a8efeaaa9cccb15cdc0a2bd7c347a149a3a7e3
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 22 00:45:31 2022 +0000
+commit c53906e0c59e569691b4095d3e8db79cf78fa058
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri May 27 18:18:31 2022 +1000
 
-    upstream: Use sshbuf_read() to read directly into the channel input
-    
-    buffer rather than into a stack buffer that needs to be copied again;
-    Improves performance by about 1% on cipher-speed.sh feedback dtucker@ ok
-    markus@
-    
-    OpenBSD-Commit-ID: bf5e6e3c821ac3546dc8241d8a94e70d47716572
+    Test against LibreSSL 3.5.3.
 
-commit 29a76994e21623a1f84d68ebb9dc5a3c909fa3a7
+commit 9b3ad432ad2f19319bcc089370e356c6315d682f
 Author: Damien Miller <djm@mindrot.org>
-Date:   Tue Jan 25 11:52:34 2022 +1100
+Date:   Fri May 27 17:00:43 2022 +1000
 
-    depend
+    fuzzer for authorized_keys parsing
+    
+    mostly redundant to authopt_fuzz, but it's sensitive code so IMO it
+    makes sense to test this layer too
 
-commit 754e0d5c7712296a7a3a83ace863812604c7bc4f
+commit c83d8c4d6f3ccceef84d46de107f6b71cda06359
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 22 00:43:43 2022 +0000
+Date:   Fri May 27 05:02:46 2022 +0000
 
-    upstream: Add a sshbuf_read() that attempts to read(2) directly in
+    upstream: split the low-level file handling functions out from
     
-    to a sshbuf; ok markus@
+    auth2-pubkey.c
     
-    OpenBSD-Commit-ID: 2d8f249040a4279f3bc23c018947384de8d4a45b
-
-commit c7964fb9829d9ae2ece8b51a76e4a02e8449338d
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 21 07:04:19 2022 +0000
-
-    upstream: add a helper for writing an error message to the
+    Put them in a new auth2-pubkeyfile.c to make it easier to refer to them
+    (e.g. in unit/fuzz tests) without having to refer to everything else
+    pubkey auth brings in.
     
-    stderr_buf and setting quit_pending; no functional change but saves a bunch
-    of boilerplate
+    ok dtucker@
     
-    OpenBSD-Commit-ID: 0747657cad6b9eabd514a6732adad537568e232d
+    OpenBSD-Commit-ID: 3fdca2c61ad97dc1b8d4a7346816f83dc4ce2217
 
-commit d23b4f7fdb1bd87e2cd7a9ae7c198ae99d347916
+commit 3b0b142d2a0767d8cd838e2f3aefde8a0aaa41e1
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 21 06:58:06 2022 +0000
+Date:   Fri May 27 05:01:25 2022 +0000
 
-    upstream: correct comment and use local variable instead of long
+    upstream: refactor authorized_keys/principals handling
+    
+    remove "struct ssh *" from arguments - this was only used to pass the
+    remote host/address. These can be passed in instead and the resulting
+    code is less tightly coupled to ssh_api.[ch]
     
-    indirection; spotted by dtucker@
+    ok dtucker@
     
-    OpenBSD-Commit-ID: 5f65f5f69db2b7d80a0a81b08f390a63f8845965
+    OpenBSD-Commit-ID: 9d4373d013edc4cc4b5c21a599e1837ac31dda0d
 
-commit d069b020a02b6e3935080204ee44d233e8158ebb
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Fri Jan 21 00:53:40 2022 +0000
+commit 2c334fd36f80cb91cc42e4b978b10aa35e0df236
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri May 27 04:29:40 2022 +0000
 
-    upstream: When poll(2) returns -1, for some error conditions
+    upstream: f sshpkt functions fail, then password is not cleared
+    
+    with freezero. Unconditionally call freezero to guarantee that password is
+    removed from RAM.
     
-    pfd[].revents is not cleared.  There are subtle errors in various programs.
-    In this particular case, the program should error out. ok djm millert
+    From tobias@ and c3h2_ctf via github PR#286, ok djm@
     
-    OpenBSD-Commit-ID: 00f839b16861f7fb2adcf122e95e8a82fa6a375c
+    OpenBSD-Commit-ID: 6b093619c9515328e25b0f8093779c52402c89cd
 
-commit e204b34337a965feb439826157c191919fd9ecf8
-Author: Damien Miller <djm@mindrot.org>
-Date:   Sat Jan 22 11:38:21 2022 +1100
+commit 5d3a77f4c5ae774c6796387266503f52c7cdc7c2
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri May 27 04:27:49 2022 +0000
 
-    restore tty force-read hack
+    upstream: Avoid kill with -1 argument. The out_ctx label can be
     
-    This portable-specific hack fixes a hang on exit for ttyful sessions
-    on Linux and some SysVish Unix variants. It was accidentally disabled
-    in commit 5c79952dfe1a (a precursor to the mainloop poll(2) conversion).
+    reached before fork has been called. If this happens, then kill -1 would be
+    called, sending SIGTERM to all processes reachable by the current process.
+    
+    From tobias@ and c3h2_ctf via github PR#286, ok djm@
     
-    Spotted by John in bz3383
+    OpenBSD-Commit-ID: 6277af1207d81202f5daffdccfeeaed4c763b1a8
 
-commit 68085066b6bad43643b43f5957fcc5fd34782ccd
-Author: Corinna Vinschen <vinschen@redhat.com>
-Date:   Fri Jan 21 03:22:56 2022 +1100
+commit 533b31cd08e4b97f455466f91c36915e2924c15a
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri May 27 04:13:24 2022 +0000
 
-    Fix signedness bug in Cygwin code
+    upstream: Note that ProxyJump also accepts the same tokens as
     
-    The Cygwin-specific pattern match code has a bug.  It checks
-    the size_t value returned by mbstowcs for being < 0.  The right
-    thing to do is to check against (size_t) -1.  Fix that.
+    ProxyCommand. From pallxk via github PR#305.
     
-    Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
+    OpenBSD-Commit-ID: 7115ac351b129205f1f1ffa6bbfd62abd76be7c5
 
-commit 2e5cfed513e84444483baf1d8b31c40072b05103
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jan 20 13:26:27 2022 +1100
+commit 9d8c80f8a304babe61ca28f2e3fb5eb6dc9c39bf
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed May 25 06:03:44 2022 +0000
 
-    Improve compatibility of early exit trap handling.
+    upstream: revert previous; it was broken (spotted by Theo)
     
-    Dash (as used by the github runners) has some differences in its trap
-    builtin:
-     - it doesn't have -p (which is fine, that's not in posix).
-     - it doesn't work in a subshell (which turns out to be in compliance
-       with posix, which means bash isn't).
-     - it doesn't work in a pipeline, ie "trap|cat" produces no output.
-
-commit 3fe6800b6027add478e648934cbb29d684e51943
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jan 20 00:49:57 2022 +1100
-
-    Move more tests out of valgrind-1 runner.
+    OpenBSD-Commit-ID: 457c79afaca2f89ec2606405c1059b98b30d8b0d
 
-commit 20da6ed136dd76e6a0b229ca3036ef9c7c7ef798
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jan 19 15:37:39 2022 +1100
+commit 9e0d02ef7ce88b67643bfb1c2272c9f5f04cc680
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Wed May 25 00:31:13 2022 +0000
 
-    Invoke EXIT handler early when using Valgrind.
+    upstream: make SSHBUF_DBG/SSHBUF_TELL (off by default and only enabled
+    
+    via #define) dump to stderr rather than stdout
     
-    When using Valgrind, we need to wait for all invoked programs to
-    complete before checking their valgrind logs.  Some tests, notably
-    agent-restrict, set an EXIT trap handler to clean up things like
-    ssh-agent, but those do not get invoked until test-exec.sh exits.
-    This causes the Valgrind wait to deadlock, so if present invoke
-    the EXIT handler before checking the Valgrind logs.
+    OpenBSD-Commit-ID: 10298513ee32db8390aecb0397d782d68cb14318
 
-commit ad2e0580c87b0714cf166bca9d926a95ddeee1c8
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jan 18 12:55:21 2022 +1100
+commit 2487163630f28be28b7e2396b4bd6511b98f1d3e
+Author: Tim Rice <tim@multitalents.net>
+Date:   Tue May 24 10:21:25 2022 -0700
 
-    Remove line leftover from upstream sync.
+    configure.ac: Add missing AC_DEFINE for caph_cache_tzdata test causing
+    HAVE_CAPH_CACHE_TZDATA to be missing from config.h.in.
+    Spotted by Bryan Drewery
 
-commit d1051c0f11a6b749027e26bbeb61b07df4b67e15
+commit bedb93415b60db3dfd704a3d525e82adb14a2481
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 17 22:56:04 2022 +0000
+Date:   Sun May 15 23:48:07 2022 +0000
 
-    upstream: when decompressing zlib compressed packets, use
-    
-    Z_SYNC_FLUSH instead of Z_PARTIAL_FLUSH as the latter is not actually
-    specified as a valid mode for inflate(). There should be no practical change
-    in behaviour as the compression side ensures a flush that should make all
-    data available to the receiver in all cases.
+    upstream: regress test for in-place transfers and clobbering larger
     
-    repoted by lamm AT ibm.com via bz3372; ok markus
+    files with smaller ones; would have caught last regression in scp(1)
     
-    OpenBSD-Commit-ID: 67cfc1fa8261feae6d2cc0c554711c97867cc81b
+    OpenBSD-Regress-ID: 19de4e88dd3a4f7e5c1618c9be3c32415bd93bc2
 
-commit d5981b1883746b1ae178a46229c26b53af99e37a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 17 21:41:04 2022 +0000
+commit b4f0d719c2548cb74da509fb65f384dada4ebd37
+Author: anton@openbsd.org <anton@openbsd.org>
+Date:   Fri Apr 22 05:08:43 2022 +0000
 
-    upstream: make most of the sftp errors more idiomatic, following
+    upstream: Only run agent-ptrace.sh if gdb is available as all
     
-    the general form of "[local/remote] operation path: error message"; ok markus
+    architectures do not ship with gdb.
     
-    OpenBSD-Commit-ID: 61364cd5f3a9fecaf8d63b4c38a42c0c91f8b571
+    OpenBSD-Regress-ID: ec53e928803e6b87f9ac142d38888ca79a45348d
 
-commit ac7c9ec894ed0825d04ef69c55babb49bab1d32e
+commit 9b73345f80255a7f3048026462f2c0c6a241eeac
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Mon Jan 17 21:39:51 2022 +0000
+Date:   Sun May 15 23:47:21 2022 +0000
 
-    upstream: when transferring multiple files in SFTP mode, create the
+    upstream: fix in-place copies; r1.163 incorrectly skipped truncation in
     
-    destination directory if it doesn't already exist to match olde-scp(1)
-    behaviour. noticed by deraadt@ ok markus@
+    all cases, not just at the start of a transfer. This could cause overwrites
+    of larger files to leave junk at the end. Spotted by tb@
     
-    OpenBSD-Commit-ID: cf44dfa231d4112f697c24ff39d7ecf2e6311407
+    OpenBSD-Commit-ID: b189f19cd68119548c8e24e39c79f61e115bf92c
 
-commit 39d17e189f8e72c34c722579d8d4e701fa5132da
+commit 56a0697fe079ff3e1ba30a2d5c26b5e45f7b71f8
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 14 03:43:48 2022 +0000
+Date:   Fri May 13 06:31:50 2022 +0000
 
-    upstream: allow pin-required FIDO keys to be added to ssh-agent(1).
+    upstream: arrange for scp, when in sftp mode, to not ftruncate(3) files
+    
+    early
     
-    ssh-askpass will be used to request the PIN at authentication time.
+    previous behavious of unconditionally truncating the destination file
+    would cause "scp ~/foo localhost:" and "scp localhost:foo ~/" to
+    delete all the contents of their destination.
     
-    From Pedro Martelletto, ok djm
+    spotted by solene@ sthen@, also bz3431; ok dtucker@
     
-    OpenBSD-Commit-ID: de8189fcd35b45f632484864523c1655550e2950
+    OpenBSD-Commit-ID: ca39fdd39e0ec1466b9666f15cbcfddea6aaa179
 
-commit 52423f64e13db2bdc31a51b32e999cb1bfcf1263
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 14 03:35:10 2022 +0000
+commit fbcef70c2832712f027bccea1aa9bc4b4103da93
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Mon May 9 08:25:27 2022 +0000
 
-    upstream: ssh-sk: free a resident key's user id
-    
-    From Pedro Martelletto; ok dtucker & me
+    upstream: Remove errant apostrophe. From haruyama at queen-ml org.
     
-    OpenBSD-Commit-ID: 47be40d602b7a6458c4c71114df9b53d149fc2e9
+    OpenBSD-Commit-ID: dc6b294567cb84b384ad6ced9ca469f2bbf0bd10
 
-commit 014e2f147a2788bfb3cc58d1b170dcf2bf2ee493
+commit 0086a286ea6bbd11ca9b664ac3bb12b27443d6eb
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 14 03:34:00 2022 +0000
+Date:   Mon May 9 03:09:53 2022 +0000
 
-    upstream: sshsk_load_resident: don't preallocate resp
-    
-    resp is allocated by client_converse(), at which point we lose
-    the original pointer.
+    upstream: Allow existing -U (use agent) flag to work with "-Y sign"
     
-    From Pedro Martelletto; ok dtucker & me
+    operations, where it will be interpreted to require that the private keys is
+    hosted in an agent; bz3429, suggested by Adam Szkoda; ok dtucker@
     
-    OpenBSD-Commit-ID: 1f1b5ea3282017d6584dfed4f8370dc1db1f44b1
+    OpenBSD-Commit-ID: a7bc69873b99c32c42c7628ed9ea91565ba08c2f
 
-commit c88265f207dfe0e8bdbaf9f0eda63ed6b33781cf
+commit cb010744cc98f651b1029bb09efa986eb54e4ccf
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 14 03:32:52 2022 +0000
+Date:   Sun May 8 22:58:35 2022 +0000
 
-    upstream: sshsk_sign: trim call to sshkey_fingerprint()
+    upstream: improve error message when 'ssh-keygen -Y sign' is unable to
     
-    the resulting fingerprint doesn't appear to be used for anything,
-    and we end up leaking it.
+    load a private key; bz3429, reported by Adam Szkoda ok dtucker@
     
-    from Pedro Martelletto; ok dtucker & me
+    OpenBSD-Commit-ID: bb57b285e67bea536ef81b1055467be2fc380e74
+
+commit aa61fc82c63d309a90c22ca74fb1da6c6f4372fd
+Author: Tobias Heider <me@tobhe.de>
+Date:   Mon May 9 02:00:01 2022 +0200
+
+    Remove duplicate bcrypt_pbkdf.o from Makefile
     
-    OpenBSD-Commit-ID: 5625cf6c68f082bc2cbbd348e69a3ed731d2f9b7
+    bcrypt_pbkdf.o is duplicated in the openbsd-compat Makefile's object
+    file list.
 
-commit 1cd1b2eac39661b849d5a4b4b56363e22bb5f61e
+commit deb506d00da8d11fb04c1e7b9b1e1cc379c1705c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Fri Jan 14 03:31:52 2022 +0000
+Date:   Sun May 8 22:32:36 2022 +0000
 
-    upstream: use status error message to communicate ~user expansion
+    upstream: When performing operations that glob(3) a remote path, ensure
     
-    failures; provides better experience for scp in sftp mode, where ~user paths
-    are more likely to be used; spotted jsg, feedback jsg & deraadt ok jsg &
-    markus
+    that the implicit working directory used to construct that path escapes
+    glob(3) characters.
+    
+    This prevents glob characters from being processed in places they
+    shouldn't, e.g. "cd /tmp/a*/", "get *.txt" should have the get operation
+    treat the path "/tmp/a*" literally and not attempt to expand it.
     
-    (forgot to include this file in previous commit)
+    Reported by Lusia Kundel; ok markus@
     
-    OpenBSD-Commit-ID: d37cc4c8c861ce48cd6ea9899e96aaac3476847b
+    OpenBSD-Commit-ID: 4f647f58482cbad3d58b1eab7f6a1691433deeef
 
-commit a1d42a6ce0398da3833bedf374ef2571af7fea50
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jan 14 13:49:32 2022 +1100
+commit f38cf74f20b5da113cfa823afd5bfb5c6ba65f3d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri May 6 14:50:18 2022 +1000
 
-    fix edge case in poll(2) wrapper
-    
-    Correct handling of select(2) exceptfds. These should only be consulted
-    for POLLPRI flagged pfds and not unconditionally converted to POLLERR.
-    
-    with and ok dtucker@
+    Also retest OpenBSD upstream on .yml changes.
 
-commit 976b9588b4b5babcaceec4767a241c11a67a5ccb
+commit f87a132800ba3710ab130d703448a31ef1128d77
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Fri Jan 14 13:46:35 2022 +1100
+Date:   Fri May 6 14:46:09 2022 +1000
 
-    Wrap OpenSSL includes in unit tests in ifdef.
-    
-    Fixes unit test on systems that do not have OpenSSL headers installed.
+    Note that, for now, we need variadic macros.
 
-commit c171879374b2e8b07157503f5639ed0bce59ce89
+commit 217b518e0f7c52c4b909e935141a55344c61e644
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Thu Jan 13 15:53:33 2022 +1100
+Date:   Fri May 6 14:39:34 2022 +1000
 
-    Remove sort wrapper.
+    Add ubsan minimal testcase on OpenBSD.
     
-    agent-restrict now takes care of this itself.
+    As suggested by djm@.
 
-commit 9cc2654403f1a686bb26c07a6ac790edf334cef5
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jan 13 04:53:16 2022 +0000
+commit 457dce2cfef6a48f5442591cd8b21c7e8cba13f8
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu May 5 01:04:14 2022 +0000
 
-    upstream: Set LC_ALL in both local and remote shells so that sorted
+    upstream: sshkey_unshield_private() contains a exact duplicate of
     
-    output matches regardless of what the user's shell sets it to.  ok djm@
+    the code in private2_check_padding(). Pull private2_check_padding() up so the
+    code can be reused. From Martin Vahlensieck, ok deraadt@
     
-    OpenBSD-Regress-ID: 4e97dd69a68b05872033175a4c2315345d01837f
+    OpenBSD-Commit-ID: 876884c3f0e62e8fd8d1594bab06900f971c9c85
 
-commit 7a75f748cb2dd2f771bf70ea72698aa027996ab1
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jan 13 04:22:10 2022 +0000
+commit 0e44db4d9cb313e68a59a44d27884af66c02356e
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu May 5 00:56:58 2022 +0000
 
-    upstream: Avoid %'s in commands (not used in OpenBSD, but used in
+    upstream: channel_new no longer frees remote_name. So update the
     
-    -portable's Valgrind test) being interpretted as printf format strings.
+    comment accordingly.  As remote_name is not modified, it can be const as
+    well. From Martin Vahlensieck
     
-    OpenBSD-Regress-ID: dc8655db27ac4acd2c386c4681bf42a10d80b043
-
-commit 6c435bd4994d71442192001483a1cdb846e5ffcd
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jan 12 16:58:13 2022 +1100
-
-    Stop on first test failure to minimize logs.
+    OpenBSD-Commit-ID: e4e10dc8dc9f40c166ea5a8e991942bedc75a76a
 
-commit 4bc2ba6095620a4484b708ece12842afd8c7685b
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Jan 12 07:18:37 2022 +0000
+commit 37b62fd5caf19c85a48241535277cefff65adace
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu May 5 00:55:11 2022 +0000
 
-    upstream: Use egrep when searching for an anchored string.
+    upstream: mux.c: mark argument as const; from Martin Vahlensieck
     
-    OpenBSD-Regress-ID: dd114a2ac27ac4b06f9e4a586d3f6320c54aeeb4
-
-commit 6bf2efa2679da1e8e60731f41677b2081dedae2c
-Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Jan 12 18:25:06 2022 +1100
-
-    Add "rev" command replacement if needed.
+    OpenBSD-Commit-ID: 69a1a93a55986c7c2ad9f733c093b46a47184341
 
-commit 72bcd7993dadaf967bb3d8564ee31cbf38132b5d
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Wed Jan 12 03:30:32 2022 +0000
+commit f4e67c0ad259b4cf10177277a5827fa5545bac53
+Author: markus@openbsd.org <markus@openbsd.org>
+Date:   Wed May 4 07:31:22 2022 +0000
 
-    upstream: Don't log NULL hostname in restricted agent code,
-    
-    printf("%s", NULL) is not safe on all platforms.  with & ok djm
+    upstream: make sure stdout is non-blocking; ok djm@
     
-    OpenBSD-Commit-ID: faf10cdae4adde00cdd668cd1f6e05d0a0e32a02
+    OpenBSD-Commit-ID: 64940fffbd1b882eda2d7c8c7a43c79368309c0d
 
-commit acabefe3f8fb58c867c99fed9bbf84dfa1771727
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 11 22:33:16 2022 +0000
+commit e5c036d2092c00bef395e9161dc5ce42d4be9565
+Author: florian@openbsd.org <florian@openbsd.org>
+Date:   Tue May 3 07:42:27 2022 +0000
 
-    upstream: remove hardcoded domain and use window.location.host, so this
+    upstream: Add FIDO AUTHENTICATOR section and explain a bit how FIDO
+    
+    works. The wording came mostly from the 8.2 OpenSSH release notes, addapted
+    to fit the man page. Then move the -O bits into the new section as is already
+    done for CERTIFICATES and MODULI GENERATION. Finally we can explain the
+    trade-offs of resident keys. While here, consistently refer to the FIDO
+    thingies as "FIDO authenticators", not "FIDO tokens".
     
-    can be run anywhere
+    input & OK jmc, naddy
     
-    OpenBSD-Regress-ID: 2ac2ade3b6227d9c547351d3ccdfe671e62b7f92
+    OpenBSD-Commit-ID: dd98748d7644df048f78dcf793b3b63db9ab1d25
 
-commit 96da0946e44f34adc0397eb7caa6ec35a3e79891
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Jan 11 02:56:19 2022 +0000
+commit 575771bf79bef7127be6aaccddc46031ea15529e
+Author: jmc@openbsd.org <jmc@openbsd.org>
+Date:   Mon May 2 05:40:37 2022 +0000
 
-    upstream: "void" functions should not return anything. From Tim Rice
+    upstream: remove an obsolete rsa1 format example from an example;
     
-    via -portable.
+    from megan batty
+    ok djm
     
-    OpenBSD-Commit-ID: ce6616304f4c9881b46413e616b226c306830e2a
+    OpenBSD-Commit-ID: db2c89879c29bf083df996bd830abfb1e70d62bf
 
-commit a882a09722c9f086c9edb65d0c4022fd965ec1ed
+commit 0bc6b4c8f04e292577bdb44d5dc6b630d3448087
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 11 01:26:47 2022 +0000
+Date:   Sun May 1 23:20:30 2022 +0000
 
-    upstream: suppress "Connection to xxx closed" messages at LogLevel >=
+    upstream: fix some integer overflows in sieve_large() that show up when
     
-    error bz3378; ok dtucker@
+    trying to generate modp groups > 16k bits. Reported via GHPR#306 by Bertram
+    Felgenhauer, but fixed in a different way. feedback/ok tb@
     
-    OpenBSD-Commit-ID: d5bf457d5d2eb927b81d0663f45248a31028265c
+    OpenBSD-Commit-ID: 81cbc6dd3a21c57bd6fadea10e44afe37bca558e
 
-commit 61a1a6af22e17fc94999a5d1294f27346e6c4668
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Jan 12 08:57:49 2022 +1100
+commit a45615cb172bc827e21ec76750de39dfb30ecc05
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Apr 29 04:55:07 2022 +0000
 
-    OS X poll(2) is broken; use compat replacement
+    upstream: be stricter in which characters will be accepted in
     
-    Darwin's poll(2) implementation is broken. For character-special
-    devices like /dev/null, it returns POLLNVAL when polled with
-    POLLIN.
+    specifying a mask length; allow only 0-9. From khaleesicodes via GHPR#278; ok
+    dtucker@
     
-    Apparently this is Apple bug 3710161, which is AFAIK not public,
-    but a websearch will find other OSS projects rediscovering it
-    periodically since it was first identified in 2005 (!!)
+    OpenBSD-Commit-ID: e267746c047ea86665cdeccef795a8a56082eeb2
 
-commit 613a6545fc5a9542753b503cbe5906538a640b60
+commit 4835544d2dd31de6ffc7dba59f92093aea98155b
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Tue Jan 11 20:56:01 2022 +1100
+Date:   Sat Apr 30 10:56:41 2022 +1000
 
-    libhardended_malloc.so moved into out dir.
+    Add Mac OS X 12 test target.
 
-commit 61761340be5e11046556623f8f5412b236cefa95
-Author: Tim Rice <tim@multitalents.net>
-Date:   Mon Jan 10 11:07:04 2022 -0800
+commit 97a6a8b8c1f2da09712d0e72d0ef800e4edd34cd
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 29 18:27:34 2022 +1000
 
-    Make USL compilers happy
-    UX:acomp: ERROR: "sftp-server.c", line 567: void function cannot return value
+    Only run tests when source files change.
+    
+    Also run tests on changes to V_9_0 branch.
 
-commit 3ef403f351e80a59b6f7e9d43cb82c181855483c
+commit 6d0392b9ff4b50a56ac5685d1b9392e2cd432ca3
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Mon Jan 10 21:07:38 2022 +1100
+Date:   Fri Apr 29 18:22:34 2022 +1000
 
-    Add wrapper for "sort" to set LC_ALL=C.
-    
-    Found by djm, this should make sorts stable and reduce test flakiness.
+    Remove now-empty int32_minmax.inc.
 
-commit bd69e29f5716090181dbe0b8272eb7eab1a383bb
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Jan 8 07:55:26 2022 +0000
+commit af59463553b5ad52d3b42c4455ee3c5600158bb7
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Fri Apr 29 03:24:30 2022 +0000
 
-    upstream: Remove errant "set -x" left over from debugging.
+    upstream: mention that the helpers are used by ssh(1), ssh-agent(1)
     
-    OpenBSD-Regress-ID: cd989268e034264cec5df97be7581549032c87dc
+    and ssh-keygen(1). Previously only ssh(1) was mentioned. From Pedro
+    Martelletto
+    
+    OpenBSD-Commit-ID: 30f880f989d4b329589c1c404315685960a5f153
 
-commit 1a7c88e26fd673813dc5f61c4ac278564845e004
+commit 3e26b3a6eebcee27be177207cc0846fb844b7a56
 Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Sat Jan 8 07:01:13 2022 +0000
+Date:   Fri Apr 29 03:16:48 2022 +0000
 
-    upstream: Enable all supported hostkey algorithms (but no others).
+    upstream: Don't leak SK device. Patch from Pedro Martelletto via
     
-    Allows hostbased test to pass when built without OpenSSL.
+    github PR#316. ok djm@
     
-    OpenBSD-Regress-ID: 5ddd677a68b672517e1e78460dc6ca2ccc0a9562
+    OpenBSD-Commit-ID: 17d11327545022e727d95fd08b213171c5a4585d
 
-commit 12b457c2a42ff271e7967d9bedd068cebb048db9
+commit 247082b5013f0d4fcae8f97453f2a2f01bcda811
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 8 07:37:32 2022 +0000
+Date:   Fri Apr 29 03:13:32 2022 +0000
 
-    upstream: use status error message to communicate ~user expansion
+    upstream: fix memleak on session-bind path; from Pedro Martelletto, ok
     
-    failures; provides better experience for scp in sftp mode, where ~user paths
-    are more likely to be used; spotted jsg, feedback jsg & deraadt ok jsg &
-    markus
+    dtucker@
     
-    OpenBSD-Commit-ID: fc610ce00ca0cdc2ecdabbd49ce7cb82033f905f
+    OpenBSD-Commit-ID: e85899a26ba402b4c0717b531317e8fc258f0a7e
 
-commit 63670d4e9030bcee490d5a9cce561373ac5b3b23
+commit e05522008092ceb86a87bdd4ad7878424315db89
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 8 07:36:11 2022 +0000
+Date:   Thu Apr 28 02:53:31 2022 +0000
 
-    upstream: fix some corner-case bugs in scp sftp-mode handling of
-    
-    ~-prefixed paths; spotted by jsg; feedback jsg & deraadt, ok jsg & markus
+    upstream: avoid printing hash algorithm twice; from lucas AT sexy.is
     
-    OpenBSD-Commit-ID: d1697dbaaa9f0f5649d69be897eab25c7d37c222
+    OpenBSD-Commit-ID: 9d24671e10a84141b7c504396cabad600e47a941
 
-commit e14940bbec57fc7d3ce0644dbefa35f5a8ec97d0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 8 07:34:57 2022 +0000
+commit 0979e29356915261d69a9517a1e0aaade7c9fc75
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Apr 27 11:08:55 2022 +0000
 
-    upstream: more idiomatic error messages; spotted by jsg & deraadt
-    
-    ok jsg & markus
+    upstream: Add authfd path to debug output. ok markus@
     
-    OpenBSD-Commit-ID: 43618c692f3951747b4151c477c7df22afe2bcc8
+    OpenBSD-Commit-ID: f735a17d1a6f2bee63bfc609d76ef8db8c090890
 
-commit 9acddcd5918c623f7ebf454520ffe946a8f15e90
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 8 07:33:54 2022 +0000
+commit 67b7c784769c74fd4d6b147d91e17e1ac1a8a96d
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Apr 26 07:41:44 2022 +0000
 
-    upstream: add a variant of send_status() that allows overriding the
+    upstream: Check sshauthopt_new() for NULL. bz#3425, from
     
-    default, generic error message. feedback/ok markus & jsg
+    tessgauthier at microsoft.com.  ok djm@
     
-    OpenBSD-Commit-ID: 81f251e975d759994131b717ee7c0b439659c40f
+    OpenBSD-Commit-ID: af0315bc3e44aa406daa7e0ae7c2d719a974483f
 
-commit 961411337719d4cd78f1ab33e4ac549f3fa22f50
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 8 07:32:45 2022 +0000
+commit d571314d14b919fbd7c84a61f9bf2065fc0a6841
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Wed Apr 20 16:00:25 2022 +0000
 
-    upstream: refactor tilde_expand_filename() and make it handle ~user
+    upstream: Remove unnecessary includes: openssl/hmac.h and
     
-    paths with no trailing slash; feedback/ok markus and jsg
+    openssl/evp.h. From Martin Vahlensieck.
     
-    OpenBSD-Commit-ID: a2ab365598a902f0f14ba6a4f8fb2d07a9b5d51d
+    OpenBSD-Commit-ID: a6debb5fb0c8a44e43e8d5ca7cc70ad2f3ea31c3
 
-commit dc38236ab6827dec575064cac65c8e7035768773
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jan 6 22:14:25 2022 +0000
+commit da8dddf8cc1f2516ff894b8183e83a7c5ba3ef80
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Wed Apr 20 15:59:18 2022 +0000
 
-    upstream: Don't explicitly set HostbasedAuthentication in
+    upstream: Add missing includes of stdlib.h and stdint.h. We need
     
-    sshd_config. It defaults to "no", and not explicitly setting it allows us to
-    enable it for the (optional) hostbased test.
+    stdlib.h for malloc(3) and stdint.h for SIZE_MAX. Unlike the other xmss
+    files, ssh-xmss.c does not include xmss_commons.h so ssh-xmss.c must include
+    those headers itself. From Martin Vahlensieck
     
-    OpenBSD-Regress-ID: aa8e3548eb5793721641d26e56c29f363b767c0c
+    OpenBSD-Commit-ID: 70e28a9818cee3da1be2ef6503d4b396dd421e6b
 
-commit e12d912ddf1c873cb72e5de9a197afbe0b6622d2
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Thu Jan 6 21:46:56 2022 +0000
+commit fe9d87a6800a7a33be08f4d5ab662a758055ced2
+Author: millert@openbsd.org <millert@openbsd.org>
+Date:   Wed Apr 20 15:56:49 2022 +0000
 
-    upstream: Add test for hostbased auth. It requires some external
+    upstream: Avoid an unnecessary xstrdup in rm_env() when matching
     
-    setup (see comments at the top) and thus is disabled unless
-    TEST_SSH_HOSTBASED_AUTH and SUDO are set.
+    patterns. Since match_pattern() doesn't modify its arguments (they are
+    const), there is no need to make an extra copy of the strings in
+    options->send_env. From Martin Vahlensieck
     
-    OpenBSD-Regress-ID: 3ec8ba3750c5b595fc63e7845d13483065a4827a
+    OpenBSD-Commit-ID: 2c9db31e3f4d3403b49642c64ee048b2a0a39351
 
-commit a48533a8da6a0f4f05ecd055dc8048047e53569e
-Author: Damien Miller <djm@mindrot.org>
-Date:   Fri Jan 7 09:24:26 2022 +1100
+commit 7bf2eb958fbb551e7d61e75c176bb3200383285d
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Tue Apr 26 23:30:59 2022 +1000
 
-    depend
+    Add debian-riscv64 test target.
 
-commit d9dbb5d9a0326e252d3c7bc13beb9c2434f59409
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:06:51 2022 +0000
+commit 3913c935523902482974c4c503bcff20bd850a6a
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Apr 25 17:20:06 2022 +1000
 
-    upstream: allow hostbased auth to select RSA keys when only
-    
-    RSA/SHA2 are configured (this is the default case); ok markus@
-    
-    OpenBSD-Commit-ID: 411c18c7bde40c60cc6dfb7017968577b4d4a827
+    Update OpenSSL and LibreSSL versions in tests.
 
-commit fdb1d58d0d3888b042e5a500f6ce524486aaf782
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:05:42 2022 +0000
+commit dcd8dca29bcdb193ff6be35b96fc55e6e30d37d9
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Apr 23 20:40:28 2022 +1000
 
-    upstream: add a helper function to match a key type to a list of
-    
-    signature algorithms. RSA keys can make signatures with multiple algorithms,
-    so some special handling is required. ok markus@
+    Include stdlib.h for free() prototype.
     
-    OpenBSD-Commit-ID: 03b41b2bda06fa4cd9c84cef6095033b9e49b6ff
+    ... which is used inside the CUSTOM_SYS_AUTH_GET_LASTLOGIN_MSG block.
 
-commit 11e8c4309a5086a45fbbbc87d0af5323c6152914
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:04:20 2022 +0000
+commit 4cc05de568e1c3edd7834ff3bd9d8214eb34861b
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Apr 23 20:17:26 2022 +1000
 
-    upstream: log some details on hostkeys that ssh loads for
-    
-    hostbased authn ok markus@
+    Cache timezone data in capsicum sandbox.
     
-    OpenBSD-Commit-ID: da17061fa1f0e58cb31b88478a40643e18233e38
+    From emaste at freebsd.org, originally part of FreeBSD commit r339216
+    / fc3c19a9 with autoconf bits added by me.
 
-commit c6706f661739514a34125aa3136532a958929510
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:03:59 2022 +0000
+commit c31404426d212e2964ff9e5e58e1d0fce3d83f27
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Thu Apr 21 01:36:46 2022 +0000
 
-    upstream: log signature algorithm during verification by monitor;
+    upstream: It looks like we can't completely avoid
     
-    ok markus
+    waiting for processes to exit so retrieve the pid via controlmaster and
+    use that.
     
-    OpenBSD-Commit-ID: 02b92bb42c4d4bf05a051702a56eb915151d9ecc
+    OpenBSD-Regress-ID: 8246f00f22b14e49d2ff1744c94897ead33d457b
 
-commit 8832402bd500d1661ccc80a476fd563335ef6cdc
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:02:52 2022 +0000
+commit d19b21afab5c8e2f3df6bd8aee9766bdad3d8c58
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Apr 20 13:25:55 2022 +0000
 
-    upstream: piece of UpdateHostkeys client strictification: when
+    upstream: Use ssh -f and ControlPersist ..
     
-    updating known_hosts with new keys, ignore NULL keys (forgot to include in
-    prior commit)
+    to start up test forwards and ssh -O stop to shut them down intead of
+    sleep loops.  This speeds up the test by an order of magnitude.
     
-    OpenBSD-Commit-ID: 49d2eda6379490e1ceec40c3b670b973f63dea08
+    OpenBSD-Regress-ID: eb3db5f805100919b092a3b2579c611fba3e83e7
 
-commit c2d9ced1da0276961d86690b3bd7ebdaca7fdbf7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:01:14 2022 +0000
+commit 5f76286a126721fa005de6edf3d1c7a265555f19
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Apr 20 05:24:13 2022 +0000
 
-    upstream: include rejected signature algorithm in error message
+    upstream: Simplify forward-control test.
     
-    and not the (useless) key type; ok markus
+    Since we no longer need to support SSH1 we don't need to run shell
+    commands on the other end of the connection and can use ssh -N instead.
+    This also makes the test less racy.
     
-    OpenBSD-Commit-ID: 4180b5ec7ab347b43f84e00b1972515296dab023
+    OpenBSD-Regress-ID: 32e94ce272820cc398f30b848b2b0f080d10302c
 
-commit 7aa7b096cf2bafe2777085abdeed5ce00581f641
+commit 687bbf23572d8bdf25cbbcdf8ac583514e1ba710
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 22:00:18 2022 +0000
+Date:   Thu Mar 31 03:07:33 2022 +0000
 
-    upstream: make ssh-keysign use the requested signature algorithm
-    
-    and not the default for the keytype. Part of unbreaking hostbased auth for
-    RSA/SHA2 keys. ok markus@
+    upstream: regression test for sftp cp command
     
-    OpenBSD-Commit-ID: b5639a14462948970da3a8020dc06f9a80ecccdc
+    OpenBSD-Regress-ID: c96bea9edde3a384b254785e7f9b2b24a81cdf82
 
-commit 291721bc7c840d113a49518f3fca70e86248b8e8
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 21:57:28 2022 +0000
+commit f1233f19a6a9fe58f52946f50df4772f5b136761
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Apr 20 01:13:47 2022 +0000
 
-    upstream: stricter UpdateHostkey signature verification logic on
-    
-    the client- side. Require RSA/SHA2 signatures for RSA hostkeys except when
-    RSA/SHA1 was explicitly negotiated during initial KEX; bz3375
-    
-    ok markus@
+    upstream: Import regenerated moduli
     
-    OpenBSD-Commit-ID: 46e75e8dfa2c813781805b842580dcfbd888cf29
+    OpenBSD-Commit-ID: f9a0726d957cf10692a231996a1f34e7f9cdfeb0
 
-commit 0fa33683223c76289470a954404047bc762be84c
+commit fec014785de198b9a325d1b94e324bb958c5fe7b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 21:55:23 2022 +0000
+Date:   Wed Apr 20 04:19:11 2022 +0000
 
-    upstream: Fix signature algorithm selection logic for
-    
-    UpdateHostkeys on the server side. The previous code tried to prefer RSA/SHA2
-    for hostkey proofs of RSA keys, but missed some cases. This will use RSA/SHA2
-    signatures for RSA keys if the client proposed these algorithms in initial
-    KEX. bz3375
+    upstream: Try to continue running local I/O for channels in state
     
-    Mostly by Dmitry Belyavskiy with some tweaks by me.
+    OPEN during SSH transport rekeying. The most visible benefit is that it
+    should make ~-escapes work in the client (e.g. to exit) if the connection
+    happened to have stalled during a rekey event. Based work by and ok dtucker@
     
-    ok markus@
+    OpenBSD-Commit-ID: a66e8f254e92edd4ce09c9f750883ec8f1ea5f45
+
+commit e68154b0d4f0f5085a050ea896955da1b1be6e30
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Wed Apr 20 01:13:47 2022 +0000
+
+    upstream: Import regenerated moduli
     
-    OpenBSD-Commit-ID: c17ba0c3236340d2c6a248158ebed042ac6a8029
+    OpenBSD-Commit-ID: f9a0726d957cf10692a231996a1f34e7f9cdfeb0
 
-commit 17877bc81db3846e6e7d4cfb124d966bb9c9296b
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 21:48:38 2022 +0000
+commit 69928b106d8f0fa15b88cf3850d992ed81c44ae0
+Author: tj@openbsd.org <tj@openbsd.org>
+Date:   Sat Apr 16 00:22:31 2022 +0000
 
-    upstream: convert ssh, sshd mainloops from select() to poll();
+    upstream: list the correct version number
     
-    feedback & ok deraadt@ and markus@ has been in snaps for a few months
+    for when usage of the sftp protocol became default and fix a typo
+    from ed maste
     
-    OpenBSD-Commit-ID: a77e16a667d5b194dcdb3b76308b8bba7fa7239c
+    OpenBSD-Commit-ID: 24e1795ed2283fdeacf16413c2f07503bcdebb31
 
-commit 5c79952dfe1aa36105c93b3f383ce9be04dee384
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Thu Jan 6 21:46:23 2022 +0000
+commit 21042a05c0b304c16f655efeec97438249d2e2cc
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Tue Apr 12 05:09:49 2022 +0000
 
-    upstream: prepare for conversion of ssh, sshd mainloop from
+    upstream: Correct path for system known hosts file in description
     
-    select() to poll() by moving FD_SET construction out of channel handlers into
-    separate functions. ok markus
+    of IgnoreUserKnownHosts.  Patch from Martin Vahlensieck via tech@
     
-    OpenBSD-Commit-ID: 937fbf2a4de12b19fb9d5168424e206124807027
+    OpenBSD-Commit-ID: 9b7784f054fa5aa4d63cb36bd563889477127215
 
-commit 24c5187edfef4651a625b7d5d692c8c7e794f71f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 21:54:37 2022 +0000
+commit 53f4aff60a7c1a08a23917bd47496f8901c471f5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Apr 16 14:33:20 2022 +1000
 
-    upstream: add a comment so I don't make this mistake again
+    Resync moduli.5 with upstream.
     
-    OpenBSD-Commit-ID: 69c7f2362f9de913bb29b6318580c5a1b52c921e
+    1.18: remove duplicate publication year; carsten dot kunze at arcor dot de
+    1.19: ssh-keygen's -G/-T have been replaced with -M generate/screen.
 
-commit 7369900441929058263a17f56aa67e05ff7ec628
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 21:50:00 2022 +0000
+commit d2b888762b9844eb0d8eb59909cdf5af5159f810
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Apr 16 14:31:13 2022 +1000
 
-    upstream: fix cut-and-pasto in error message
+    Retire fbsd6 test VM.
     
-    OpenBSD-Commit-ID: 4cc5c619e4b456cd2e9bb760d17e3a9c84659198
+    It's long since out of support, relatively slow (it's i686) and the
+    compiler has trouble with PIE.
 
-commit 294c11b1c7d56d3fb61e329603a782315ed70c62
+commit cd1f70009860a154b51230d367c55ea5f9a4504e
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 08:25:05 2022 +0000
+Date:   Mon Apr 11 22:52:08 2022 +0000
 
-    upstream: select all RSA hostkey algorithms for UpdateHostkeys tests,
+    upstream: clear io_want/io_ready flags at start of poll() cycle;
     
-    not just RSA-SHA1
+    avoids plausible spin during rekeying if channel io_want flags are reused
+    across cycles. ok markus@ deraadt@
     
-    OpenBSD-Regress-ID: b40e62b65863f2702a0c10aca583b2fe76772bd8
+    OpenBSD-Commit-ID: 91034f855b7c73cd2591657c49ac30f10322b967
 
-commit 2ea1108c30e3edb6f872dfc1e6da10b041ddf2c0
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:56:15 2022 +0000
+commit aa1920302778273f7f94c2091319aba199068ca0
+Author: dtucker@openbsd.org <dtucker@openbsd.org>
+Date:   Fri Apr 8 05:43:39 2022 +0000
 
-    upstream: regress test both sshsig message hash algorithms, possible
+    upstream: Note that curve25519-sha256 was later published in
     
-    now because the algorithm is controllable via the CLI
+    RFC8731.  ok djm@
     
-    OpenBSD-Regress-ID: 0196fa87acc3544b2b4fd98de844a571cb09a39f
+    OpenBSD-Commit-ID: 2ac2b5d642d4cf5918eaec8653cad9a4460b2743
 
-commit 2327c306b5d4a2b7e71178e5a4d139af9902c2b0
+commit 4673fa8f2be983f2f88d5afd754adb1a2a39ec9e
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:50:11 2022 +0000
+Date:   Fri Apr 8 04:40:40 2022 +0000
 
-    upstream: allow selection of hash at sshsig signing time; code
+    upstream: two defensive changes from Tobias Stoeckmann via GHPR287
+    
+    enforce stricter invarient for sshbuf_set_parent() - never allow
+    a buffer to have a previously-set parent changed.
     
-    already supported either sha512 (default) or sha256, but plumbing wasn't
-    there mostly by Linus Nordberg
+    In sshbuf_reset(), if the reallocation fails, then zero the entire
+    buffer and not the (potentially smaller) default initial alloc size.
     
-    OpenBSD-Commit-ID: 1b536404b9da74a84b3a1c8d0b05fd564cdc96cd
+    OpenBSD-Commit-ID: 14583203aa5d50ad38d2e209ae10abaf8955e6a9
 
-commit 56e941d0a00d6d8bae88317717d5e1b7395c9529
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:27:54 2022 +0000
+commit 26eef015e2d2254375e13afaaf753b78932b1bf5
+Author: Damien Miller <djm@mindrot.org>
+Date:   Mon Apr 11 16:07:09 2022 +1000
 
-    upstream: add missing -O option to usage() for ssh-keygen -Y sign;
+    Revert "update build-aux files to match autoconf-2.71"
     
-    from Linus Nordberg
+    This reverts commit 0a8ca39fac6ad19096b6c263436f8b2dd51606f2.
     
-    OpenBSD-Commit-ID: 4e78feb4aa830727ab76bb2e3d940440ae1d7af0
+    It turns out that the checked-in copies of these files are actually newer
+    than autoconf-2.71's copies, so this was effectively a downgrade.
+    Spotted by Bo Anderson via github
 
-commit 141a14ec9b0924709c98df2dd8013bde5d8d12c7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:27:01 2022 +0000
+commit 0a8ca39fac6ad19096b6c263436f8b2dd51606f2
+Author: Damien Miller <djm@mindrot.org>
+Date:   Fri Apr 8 14:48:58 2022 +1000
 
-    upstream: move sig_process_opts() to before sig_sign(); no
-    
-    functional code change
+    update build-aux files to match autoconf-2.71
     
-    OpenBSD-Commit-ID: da02d61f5464f72b4e8b299f83e93c3b657932f9
+    i.e. config.guess, config.sub and install-sh
+
+commit 94eb6858efecc1b4f02d8a6bd35e149f55c814c8
+Author: Damien Miller <djm@mindrot.org>
+Date:   Wed Apr 6 10:47:48 2022 +1000
+
+    update version numbers for release
 
-commit 37a14249ec993599a9051731e4fb0ac5e976aec1
+commit 8e4a8eadf4fe74e65e6492f34250f8cf7d67e8da
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:10:39 2022 +0000
+Date:   Mon Apr 4 22:45:25 2022 +0000
 
-    upstream: regression test for find-principals NULL deref; from Fabian
-    
-    Stelzer
+    upstream: openssh-9.0
     
-    OpenBSD-Regress-ID: f845a8632a5a7d5ae26978004c93e796270fd3e5
+    OpenBSD-Commit-ID: 0dfb461188f4513ec024c1534da8c1ce14c20b64
 
-commit eb1f042142fdaba93f6c9560cf6c91ae25f6884a
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Wed Jan 5 04:02:42 2022 +0000
+commit a9f23ea2e3227f406880c2634d066f6f50fa5eaa
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Thu Mar 31 17:58:44 2022 +0000
 
-    upstream: NULL deref when using find-principals when matching an
+    upstream: ssh: document sntrup761x25519-sha512@openssh.com as
     
-    allowed_signers line that contains a namespace restriction, but no
-    restriction specified on the command-line; report and fix from Fabian Stelzer
+    default KEX
     
-    OpenBSD-Commit-ID: 4a201b86afb668c908d1a559c6af456a61f4b145
+    OpenBSD-Commit-ID: 12545bfa10bcbf552d04d9d9520d0f4e98b0e171
 
-commit 8f3b18030579f395eca2181da31a5f945af12a59
-Author: dtucker@openbsd.org <dtucker@openbsd.org>
-Date:   Tue Jan 4 08:38:53 2022 +0000
+commit 9ec2713d122af79d66ebb9c1d6d9ae8621a8945f
+Author: naddy@openbsd.org <naddy@openbsd.org>
+Date:   Thu Mar 31 17:27:27 2022 +0000
 
-    upstream: Log command invocation while debugging.
+    upstream: man pages: add missing commas between subordinate and
+    
+    main clauses
+    
+    jmc@ dislikes a comma before "then" in a conditional, so leave those
+    untouched.
     
-    This will aid in manually reproducing failing commands.
+    ok jmc@
     
-    OpenBSD-Regress-ID: b4aba8d5ac5675ceebeeeefa3261ce344e67333a
+    OpenBSD-Commit-ID: 9520801729bebcb3c9fe43ad7f9776ab4dd05ea3
 
-commit bbf285164df535f0d38c36237f007551bbdae27f
+commit 3741df98ffaaff92b474ee70d8ef276b5882f85a
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sun Dec 26 10:31:15 2021 +1100
+Date:   Mon Apr 4 23:52:11 2022 +1000
 
-    Always save config.h as build artifact.
-    
-    Should allow better comparison between failing and succeeding test
-    platforms.
+    Disable security key on fbsd6 test host.
 
-commit 03bd4ed0db699687c5cd83405d26f81d2dc28d22
+commit 32c12236f27ae83bfe6d2983b67c9bc67a83a417
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Sat Dec 25 16:42:51 2021 +1100
-
-    Add OpenBSD 7.0 target.  Retire 6.8.
-
-commit c45a752f0de611afd87755c2887c8a24816d08ee
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Sat Jan 1 05:55:06 2022 +0000
-
-    upstream: spelling
-    
-    OpenBSD-Commit-ID: c63e43087a64d0727af13409c708938e05147b62
-
-commit c672f83a89a756564db0d3af9934ba0e1cf8fa3e
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Jan 4 07:20:33 2022 +0000
+Date:   Mon Apr 4 15:16:51 2022 +1000
 
-    upstream: unbreak test: was picking up system ssh-add instead of the
-    
-    one supposedly being tested. Spotted by dtucker and using his VM zoo (which
-    includes some systems old enough to lack ed25519 key support)
+    Specify TEST_SHELL=bash on AIX.
     
-    OpenBSD-Regress-ID: 7976eb3df11cc2ca3af91030a6a8c0cef1590bb5
+    The system shells cause the agent-restrict test to fail due to some
+    quoting so explicitly specify bash until we can get configure to
+    autmatically work around that.
 
-commit a23698c3082ffe661abed14b020eac9b0c25eb9f
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sat Jan 1 04:18:06 2022 +0000
+commit 90452c8b69d065b7c7c285ff78b81418a75bcd76
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 1 23:38:44 2022 +1100
 
-    upstream: fix memleak in process_extension(); oss-fuzz issue #42719
+    Only return events from ppoll that were requested.
     
-    OpenBSD-Commit-ID: d8d49f840162fb7b8949e3a5adb8107444b6de1e
+    If the underlying system's select() returns bits that were not in the
+    request set, our ppoll() implementation can return revents for events
+    not requested, which can apparently cause a hang.  Only return revents
+    for activity in the requested event set.  bz#3416, analysis and fix by
+    yaroslav.kuzmin at vmssoftware com, ok djm@
 
-commit cb885178f36b83d0f14cfe9f345d2068103feed0
-Author: jsg@openbsd.org <jsg@openbsd.org>
-Date:   Sat Jan 1 01:55:30 2022 +0000
+commit 6c49eb5fabc56f4865164ed818aa5112d09c31a8
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 1 23:21:40 2022 +1100
 
-    upstream: spelling ok dtucker@
-    
-    OpenBSD-Commit-ID: bfc7ba74c22c928de2e257328b3f1274a3dfdf19
+    Only run regression tests on slow VMs.
 
-commit 6b977f8080a32c5b3cbb9edb634b9d5789fb79be
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 26 23:34:41 2021 +0000
+commit f67e47903977b42cb6abcd5565a61bd7293e4dc3
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 1 23:21:06 2022 +1100
 
-    upstream: split method list search functionality from
-    
-    authmethod_lookup() into a separate authmethod_byname(), for cases where we
-    don't need to check whether a method is enabled, etc.
-    
-    use this to fix the "none" authentication method regression reported
-    by Nam Nguyen via bugs@
-    
-    ok deraadt@
-    
-    OpenBSD-Commit-ID: 8cd188dc3a83aa8abe5b7693e762975cd8ea8a17
+    Increase test timeout to allow slow VMs to finish
 
-commit 0074aa2c8d605ee7587279a22cdad4270b4ddd07
-Author: jmc@openbsd.org <jmc@openbsd.org>
-Date:   Wed Dec 22 06:56:41 2021 +0000
+commit 02488c1b54065ddc4f25835dbd2618b2a2fe21f5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 1 16:27:38 2022 +1100
 
-    upstream: sort -H and -h in SYNOPSIS/usage(); tweak the -H text;
-    
-    ok djm
-    
-    OpenBSD-Commit-ID: 90721643e41e9e09deb5b776aaa0443456ab0965
+    Use bash or ksh if available for SH in Makefile.
 
-commit 1c9853a68b2319f2e5f929179735e8fbb9988a67
+commit 34c7018c316af4773e432066de28d0ef9d0888cd
 Author: Darren Tucker <dtucker@dtucker.net>
-Date:   Wed Dec 22 19:33:10 2021 +1100
+Date:   Fri Apr 1 14:56:54 2022 +1100
 
-    Use SHA.*_HMAC_BLOCK_SIZE if needed.
+    Set Makefile SHELL as determined by configure.
     
-    If the platform has a native SHA2, does not define SHA.*_BLOCK_LENGTH
-    but does define SHA.*_HMAC_BLOCK_SIZE (eg Solaris) then use the latter.
-    Should fix --without-openssl build on Solaris.
+    This should improve compatibility for users with non-POSIX shells.  If
+    using Makefile.in directly (eg make -f Makefile.in distprep) then SHELL
+    will need to be specified on the command line (along with MANFMT in that
+    particular case).  ok djm@
 
-commit 715c892f0a5295b391ae92c26ef4d6a86ea96e8e
-Author: Damien Miller <djm@mindrot.org>
-Date:   Wed Dec 22 09:02:50 2021 +1100
+commit 5b054d76402faab38c48377efd112426469553a0
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Fri Apr 1 13:16:47 2022 +1100
 
-    remove sys/param.h in -portable, after upstream
+    Skip slow tests on (very) slow test targets.
 
-commit 7a7c69d8b4022b1e5c0afb169c416af8ce70f3e8
+commit b275818065b31a865142c48c2acf6a7c1655c542
 Author: Damien Miller <djm@mindrot.org>
-Date:   Mon Dec 20 13:05:20 2021 +1100
+Date:   Thu Mar 31 14:11:36 2022 +1100
 
-    add agent-restrict.sh file, missed in last commit
+    depend
 
-commit f539136ca51a4976644db5d0be8158cc1914c72a
+commit 3fa539c3ffaabd6211995512d33e29150f88c5c5
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:20:12 2021 +0000
+Date:   Thu Mar 31 03:07:03 2022 +0000
 
-    upstream: regression test for destination restrictions in ssh-agent
+    upstream: add a sftp client "cp" command that supports server-side
     
-    OpenBSD-Regress-ID: 3c799d91e736b1753b4a42d80c42fc40de5ad33d
-
-commit 6e4980eb8ef94c04874a79dd380c3f568e8416d6
-Author: anton@openbsd.org <anton@openbsd.org>
-Date:   Sat Dec 18 06:53:59 2021 +0000
-
-    upstream: Make use of ntests variable, pointed out by clang 13.
+    copying of files. Useful for this task and for testing the copy-data
+    extension. Patch from Mike Frysinger; ok dtucker@
     
-    OpenBSD-Regress-ID: 4241a3d21bdfa1630ed429b6d4fee51038d1be72
+    OpenBSD-Commit-ID: 1bb1b950af0d49f0d5425b1f267e197aa1b57444
 
-commit 3eead8158393b697f663ec4301e3c7b6f24580b1
-Author: deraadt@openbsd.org <deraadt@openbsd.org>
-Date:   Tue Dec 14 21:25:27 2021 +0000
+commit 7988bfc4b701c4b3fe9b36c8561a3d1c5d4c9a74
+Author: djm@openbsd.org <djm@openbsd.org>
+Date:   Thu Mar 31 03:05:49 2022 +0000
 
-    upstream: sys/param.h cleanup, mostly using MINIMUM() and
+    upstream: add support for the "corp-data" protocol extension to
     
-    <limits.h> ok dtucker
+    allow server-side copies to be performed without having to go via the client.
+    Patch by Mike Frysinger, ok dtucker@
     
-    OpenBSD-Regress-ID: 172a4c45d3bcf92fa6cdf6c4b9db3f1b3abe4db0
+    OpenBSD-Commit-ID: 00aa510940fedd66dab1843b58682de4eb7156d5
 
-commit 266678e19eb0e86fdf865b431b6e172e7a95bf48
+commit 32dc1c29a4ac9c592ddfef0a4895eb36c1f567ba
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:15:42 2021 +0000
+Date:   Wed Mar 30 21:13:23 2022 +0000
 
-    upstream: document host-bound publickey authentication
+    upstream: select post-quantum KEX
     
-    OpenBSD-Commit-ID: ea6ed91779a81f06d961e30ecc49316b3d71961b
-
-commit 3d00024b3b156aa9bbd05d105f1deb9cb088f6f7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:15:21 2021 +0000
-
-    upstream: document agent protocol extensions
+    sntrup761x25519-sha512@openssh.com as the default; ok markus@
     
-    OpenBSD-Commit-ID: 09e8bb391bbaf24c409b75a4af44e0cac65405a7
+    OpenBSD-Commit-ID: f02d99cbfce22dffec2e2ab1b60905fbddf48fb9
 
-commit c385abf76511451bcba78568167b1cd9e90587d5
+commit d6556de1db0822c76ba2745cf5c097d9472adf7c
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:14:47 2021 +0000
+Date:   Wed Mar 30 21:10:25 2022 +0000
 
-    upstream: PubkeyAuthentication=yes|no|unbound|host-bound
-    
-    Allow control over which pubkey methods are used. Added out of
-    concern that some hardware devices may have difficulty signing
-    the longer pubkey authentication challenges. This provides a
-    way for them to disable the extension. It's also handy for
-    testing.
+    upstream: fix poll() spin when a channel's output fd closes without
     
-    feedback / ok markus@
+    data in the channel buffer. Introduce more exact packing of channel fds into
+    the pollfd array. fixes bz3405 and bz3411; ok deraadt@ markus@
     
-    OpenBSD-Commit-ID: ee52580db95c355cf6d563ba89974c210e603b1a
+    OpenBSD-Commit-ID: 06740737849c9047785622ad5d472cb6a3907d10
 
-commit 34b1e9cc7654f41cd4c5b1cc290b999dcf6579bb
+commit 8a74a96d25ca4d32fbf298f6c0ac5a148501777d
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:14:12 2021 +0000
+Date:   Wed Mar 30 04:33:09 2022 +0000
 
-    upstream: document destination-constrained keys
+    upstream: ssh is almost out of getopt() characters; note the
     
-    feedback / ok markus@
+    remaining remaining available ones in a comment
     
-    OpenBSD-Commit-ID: cd8c526c77268f6d91c06adbee66b014d22d672e
+    OpenBSD-Commit-ID: 48d38cef59d6bc8e84c6c066f6d601875d3253fd
 
-commit a6d7677c4abcfba268053e5867f2acabe3aa371b
+commit 6d4fc51adb9d8a42f67b5474f02f877422379de6
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:13:55 2021 +0000
+Date:   Wed Mar 30 04:27:51 2022 +0000
 
-    upstream: Use hostkey parsed from hostbound userauth request
-    
-    Require host-bound userauth requests for forwarded SSH connections.
-    
-    The hostkey parsed from the host-bound userauth request is now checked
-    against the most recently bound session ID / hostkey on the agent socket
-    and the signature refused if they do not match.
+    upstream: avoid NULL deref via ssh-keygen -Y find-principals.
     
-    ok markus@
+    bz3409, reported by Mateusz Adamowski
     
-    OpenBSD-Commit-ID: d69877c9a3bd8d1189a5dbdeceefa432044dae02
+    OpenBSD-Commit-ID: a3b2c02438052ee858e0ee18e5a288586b5df2c5
 
-commit baaff0ff4357cc5a079621ba6e2d7e247b765061
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:13:33 2021 +0000
+commit e937514920335b92b543fd9be79cd6481d1eb0b6
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Mon Mar 28 17:51:03 2022 +1100
 
-    upstream: agent support for parsing hostkey-bound signatures
-    
-    Allow parse_userauth_request() to work with blobs from
-    publickey-hostbound-v00@openssh.com userauth attempts.
-    
-    Extract hostkey from these blobs.
-    
-    ok markus@
-    
-    OpenBSD-Commit-ID: 81c064255634c1109477dc65c3e983581d336df8
+    Add AIX 5.1 test target.
 
-commit 3e16365a79cdeb2d758cf1da6051b1c5266ceed7
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:13:12 2021 +0000
+commit 4bbe815ba974b4fd89cc3fc3e3ef1be847a0befe
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 22:01:31 2022 +1100
 
-    upstream: EXT_INFO negotiation of hostbound pubkey auth
-    
-    the EXT_INFO packet gets a new publickey-hostbound@openssh.com to
-    advertise the hostbound public key method.
-    
-    Client side support to parse this feature flag and set the kex->flags
-    indicator if the expected version is offered (currently "0").
-    
-    ok markus@
+    Drop leading "v" from release version identifier.
     
-    OpenBSD-Commit-ID: 4cdb2ca5017ec1ed7a9d33bda95c1d6a97b583b0
+    It's present in the git tags but not in the release tarball names.
+    Also drop extra "/" from URL path.
 
-commit 94ae0c6f0e35903b695e033bf4beacea1d376bb1
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:12:54 2021 +0000
+commit f5cdd3b3c275dffaebfca91df782dca29975e9ac
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 16:28:04 2022 +1100
 
-    upstream: client side of host-bound pubkey authentication
-    
-    Add kex->flags member to enable the publickey-hostbound-v00@openssh.com
-    authentication method.
-    
-    Use the new hostbound method in client if the kex->flags flag was set,
-    and include the inital KEX hostkey in the userauth request.
-    
-    Note: nothing in kex.c actually sets the new flag yet
-    
-    ok markus@
+    Use tarballs when testing LibreSSL releases.
     
-    OpenBSD-Commit-ID: 5a6fce8c6c8a77a80ee1526dc467d91036a5910d
+    This means they'll still work when the combination of -portable and
+    openbsd github repos no longer match.
 
-commit 288fd0218dbfdcb05d9fbd1885904bed9b6d42e6
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:12:30 2021 +0000
+commit 24dc37d198f35a7cf71bf4d5384363c7ef4209d4
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 15:02:45 2022 +1100
 
-    upstream: sshd side of hostbound public key auth
-    
-    This is identical to the standard "publickey" method, but it also includes
-    the initial server hostkey in the message signed by the client.
-    
-    feedback / ok markus@
+    Remove now-unused passwd variable.
+
+commit 5b467ceef2c356f0a77f5e8ab4eb0fac367e4d24
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 13:15:44 2022 +1100
+
+    Missing semicolon.
+
+commit 2923d026e55998133c0f6e5186dca2a3c0fa5ff5
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 12:49:50 2022 +1100
+
+    Factor out platform-specific locked account check.
     
-    OpenBSD-Commit-ID: 7ea01bb7238a560c1bfb426fda0c10a8aac07862
+    Also fixes an incorrect free on platforms with both libiaf and shadow
+    passwords (probably only Unixware).  Prompted by github PR#284,
+    originally from @c3h2_ctf and stoeckmann@.
+
+commit d23efe4b12886ffe416be10bc0a7da6ca8aa72d1
+Author: Darren Tucker <dtucker@dtucker.net>
+Date:   Sat Mar 26 08:13:46 2022 +1100
+
+    Add OpenWRT mips and mipsel test targets.
 
-commit dbb339f015c33d63484261d140c84ad875a9e548
+commit 16ea8b85838dd7a4dbeba4e51ac4f43fd68b1e5b
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:12:07 2021 +0000
+Date:   Sun Mar 20 08:52:17 2022 +0000
 
-    upstream: prepare for multiple names for authmethods
-    
-    allow authentication methods to have one additional name beyond their
-    primary name.
-    
-    allow lookup by this synonym
-    
-    Use primary name for authentication decisions, e.g. for
-    PermitRootLogin=publickey
-    
-    Pass actual invoked name to the authmethods, so they can tell whether they
-    were requested via the their primary name or synonym.
+    upstream: don't leak argument list; bz3404, reported by Balu
     
-    ok markus@
+    Gajjala ok dtucker@
     
-    OpenBSD-Commit-ID: 9e613fcb44b8168823195602ed3d09ffd7994559
+    OpenBSD-Commit-ID: fddc32d74e5dd5cff1a49ddd6297b0867eae56a6
 
-commit 39f00dcf44915f20684160f0a88d3ef8a3278351
+commit a72bde294fe0518c9a44ba63864093a1ef2425e3
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:11:39 2021 +0000
+Date:   Sun Mar 20 08:51:21 2022 +0000
 
-    upstream: ssh-agent side of destination constraints
+    upstream: make addargs() and replacearg() a little more robust and
     
-    Gives ssh-agent the ability to parse restrict-destination-v00@openssh.com
-    constraints and to apply them to keys.
+    improve error reporting
     
-    Check constraints against the hostkeys recorded for a SocketEntry when
-    attempting a signature, adding, listing or deleting keys. Note that
-    the "delete all keys" request will remove constrained keys regardless of
-    location.
+    make freeargs(NULL) a noop like the other free functions
     
-    feedback Jann Horn & markus@
-    ok markus@
+    ok dtucker as part of bz3403
     
-    OpenBSD-Commit-ID: 84a7fb81106c2d609a6ac17469436df16d196319
+    OpenBSD-Commit-ID: 15f86da83176978b4d1d288caa24c766dfa2983d
 
-commit ce943912df812c573a33d00bf9e5435b7fcca3f7
+commit 731087d2619fa7f01e675b23f57af10d745e8af2
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:11:06 2021 +0000
+Date:   Fri Mar 18 04:04:11 2022 +0000
 
-    upstream: ssh-add side of destination constraints
-    
-    Have ssh-add accept a list of "destination constraints" that allow
-    restricting where keys may be used in conjunction with a ssh-agent/ssh
-    that supports session ID/hostkey binding.
-    
-    Constraints are specified as either "[user@]host-pattern" or
-    "host-pattern>[user@]host-pattern".
-    
-    The first form permits a key to be used to authenticate as the
-    specified user to the specified host.
-    
-    The second form permits a key that has previously been permitted
-    for use at a host to be available via a forwarded agent to an
-    additional host.
-    
-    For example, constraining a key with "user1@host_a" and
-    "host_a>host_b". Would permit authentication as "user1" at
-    "host_a", and allow the key to be available on an agent forwarded
-    to "host_a" only for authentication to "host_b". The key would not
-    be visible on agent forwarded to other hosts or usable for
-    authentication there.
-    
-    Internally, destination constraints use host keys to identify hosts.
-    The host patterns are used to obtain lists of host keys for that
-    destination that are communicated to the agent. The user/hostkeys are
-    encoded using a new restrict-destination-v00@openssh.com key
-    constraint.
-    
-    host keys are looked up in the default client user/system known_hosts
-    files. It is possible to override this set on the command-line.
+    upstream: don't try to resolve ListenAddress directives in the sshd
     
-    feedback Jann Horn & markus@
-    ok markus@
+    re-exec path - we're never going to use the result and if the operation fails
+    then it can prevent connections from being accepted. Reported by Aaron
+    Poffenberger; with / ok dtucker@
     
-    OpenBSD-Commit-ID: 6b52cd2b637f3d29ef543f0ce532a2bce6d86af5
+    OpenBSD-Commit-ID: 44c53a43909a328e2f5ab26070fdef3594eded60
 
-commit 5e950d765727ee0b20fc3d2cbb0c790b21ac2425
+commit 1c83c082128694ddd11ac05fdf31d70312ff1763
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:10:24 2021 +0000
+Date:   Fri Mar 18 02:50:21 2022 +0000
 
-    upstream: ssh-add side of destination constraints
-    
-    Have ssh-add accept a list of "destination constraints" that allow
-    restricting where keys may be used in conjunction with a ssh-agent/ssh
-    that supports session ID/hostkey binding.
-    
-    Constraints are specified as either "[user@]host-pattern" or
-    "host-pattern>[user@]host-pattern".
-    
-    The first form permits a key to be used to authenticate as the
-    specified user to the specified host.
-    
-    The second form permits a key that has previously been permitted
-    for use at a host to be available via a forwarded agent to an
-    additional host.
-    
-    For example, constraining a key with "user1@host_a" and
-    "host_a>host_b". Would permit authentication as "user1" at
-    "host_a", and allow the key to be available on an agent forwarded
-    to "host_a" only for authentication to "host_b". The key would not
-    be visible on agent forwarded to other hosts or usable for
-    authentication there.
-    
-    Internally, destination constraints use host keys to identify hosts.
-    The host patterns are used to obtain lists of host keys for that
-    destination that are communicated to the agent. The user/hostkeys are
-    encoded using a new restrict-destination-v00@openssh.com key
-    constraint.
-    
-    host keys are looked up in the default client user/system known_hosts
-    files. It is possible to override this set on the command-line.
-    
-    feedback Jann Horn & markus@
-    ok markus@
+    upstream: remove blank line
     
-    OpenBSD-Commit-ID: ef47fa9ec0e3c2a82e30d37ef616e245df73163e
+    OpenBSD-Commit-ID: d5e0182965b2fbfb03ad5f256d1a1ce5706bcddf
 
-commit 4c1e3ce85e183a9d0c955c88589fed18e4d6a058
+commit 807be68684da7a1fe969c399ddce2fafb7997dcb
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:09:23 2021 +0000
+Date:   Fri Mar 18 02:32:22 2022 +0000
 
-    upstream: ssh-agent side of binding
-    
-    record session ID/hostkey/forwarding status for each active socket.
-    
-    Attempt to parse data-to-be-signed at signature request time and extract
-    session ID from the blob if it is a pubkey userauth request.
-    
-    ok markus@
+    upstream: helpful comment
     
-    OpenBSD-Commit-ID: a80fd41e292b18b67508362129e9fed549abd318
+    OpenBSD-Commit-ID: e3315a45cb04e7feeb614d76ec80a9fe4ca0e8c7
 
-commit e9497ecf73f3c16667288bce48d4e3d7e746fea1
+commit a0b5816f8f1f645acdf74f7bc11b34455ec30bac
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:08:48 2021 +0000
+Date:   Fri Mar 18 02:31:25 2022 +0000
 
-    upstream: ssh client side of binding
-    
-    send session ID, hostkey, signature and a flag indicating whether the
-    agent connection is being forwarded to ssh agent each time a connection
-    is opened via a new "session-bind@openssh.com" agent extension.
+    upstream: ssh-keygen -Y check-novalidate requires namespace or SEGV
     
-    ok markus@
+    will ensue. Patch from Mateusz Adamowski via GHPR#307
     
-    OpenBSD-Commit-ID: 2f154844fe13167d3ab063f830d7455fcaa99135
+    OpenBSD-Commit-ID: 99e8ec38f9feb38bce6de240335be34aedeba5fd
 
-commit b42c61d6840d16ef392ed0f365e8c000734669aa
+commit 5a252d54a63be30d5ba4be76210942d754a531c0
 Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Sun Dec 19 22:08:06 2021 +0000
+Date:   Tue Mar 15 05:27:37 2022 +0000
 
-    upstream: Record session ID, host key and sig at intital KEX
-    
-    These will be used later for agent session ID / hostkey binding
-    
-    ok markus@
+    upstream: improve DEBUG_CHANNEL_POLL debugging message
     
-    OpenBSD-Commit-ID: a9af29e33772b18e3e867c6fa8ab35e1694a81fe
+    OpenBSD-Commit-ID: 2275eb7bc4707d019b1a0194b9c92c0b78da848f
 
-commit 26ca33d186473d58a32d812e19273ce078b6ffff
-Author: djm@openbsd.org <djm@openbsd.org>
-Date:   Tue Dec 7 22:06:45 2021 +0000
+commit ce324cf58ba2840e31afeb996935800780c8fa4b
+Author: cheloha@openbsd.org <cheloha@openbsd.org>
+Date:   Sun Mar 13 23:27:54 2022 +0000
 
-    upstream: better error message for FIDO keys when we can't match
+    upstream: ssh: xstrdup(): use memcpy(3)
     
-    them to a token
+    Copying the given string into the buffer with strlcpy(3) confers no
+    benefit in this context because we have already determined the
+    string's length with strlen(3) in order to allocate that buffer.
+    
+    Thread: https://marc.info/?l=openbsd-tech&m=164687525802691&w=2
+    
+    ok dtucker@ millert@
     
-    OpenBSD-Commit-ID: 58255c2a1980088f4ed144db67d879ada2607650
+    OpenBSD-Commit-ID: f8bfc082e36e2d2dc4e1feece02fe274155ca11a
diff --git a/PROTOCOL b/PROTOCOL
index 1894d573d739..26387793febc 100644
--- a/PROTOCOL
+++ b/PROTOCOL
@@ -1,793 +1,795 @@
 This documents OpenSSH's deviations and extensions to the published SSH
 protocol.
 
 Note that OpenSSH's sftp and sftp-server implement revision 3 of the SSH
 filexfer protocol described in:
 
 https://www.openssh.com/txt/draft-ietf-secsh-filexfer-02.txt
 
 Newer versions of the draft will not be supported, though some features
 are individually implemented as extensions described below.
 
 The protocol used by OpenSSH's ssh-agent is described in the file
 PROTOCOL.agent
 
 1. Transport protocol changes
 
 1.1. transport: Protocol 2 MAC algorithm "umac-64@openssh.com"
 
 This is a new transport-layer MAC method using the UMAC algorithm
 (rfc4418). This method is identical to the "umac-64" method documented
 in:
 
 https://www.openssh.com/txt/draft-miller-secsh-umac-01.txt
 
 1.2. transport: Protocol 2 compression algorithm "zlib@openssh.com"
 
 This transport-layer compression method uses the zlib compression
 algorithm (identical to the "zlib" method in rfc4253), but delays the
 start of compression until after authentication has completed. This
 avoids exposing compression code to attacks from unauthenticated users.
 
 The method is documented in:
 
 https://www.openssh.com/txt/draft-miller-secsh-compression-delayed-00.txt
 
 1.3. transport: New public key algorithms "ssh-rsa-cert-v01@openssh.com",
      "ssh-dsa-cert-v01@openssh.com",
      "ecdsa-sha2-nistp256-cert-v01@openssh.com",
      "ecdsa-sha2-nistp384-cert-v01@openssh.com" and
      "ecdsa-sha2-nistp521-cert-v01@openssh.com"
 
 OpenSSH introduces new public key algorithms to support certificate
 authentication for users and host keys. These methods are documented
 in the file PROTOCOL.certkeys
 
 1.4. transport: Elliptic Curve cryptography
 
 OpenSSH supports ECC key exchange and public key authentication as
 specified in RFC5656. Only the ecdsa-sha2-nistp256, ecdsa-sha2-nistp384
 and ecdsa-sha2-nistp521 curves over GF(p) are supported. Elliptic
 curve points encoded using point compression are NOT accepted or
 generated.
 
 1.5 transport: Protocol 2 Encrypt-then-MAC MAC algorithms
 
 OpenSSH supports MAC algorithms, whose names contain "-etm", that
 perform the calculations in a different order to that defined in RFC
 4253. These variants use the so-called "encrypt then MAC" ordering,
 calculating the MAC over the packet ciphertext rather than the
 plaintext. This ordering closes a security flaw in the SSH transport
 protocol, where decryption of unauthenticated ciphertext provided a
 "decryption oracle" that could, in conjunction with cipher flaws, reveal
 session plaintext.
 
 Specifically, the "-etm" MAC algorithms modify the transport protocol
 to calculate the MAC over the packet ciphertext and to send the packet
 length unencrypted. This is necessary for the transport to obtain the
 length of the packet and location of the MAC tag so that it may be
 verified without decrypting unauthenticated data.
 
 As such, the MAC covers:
 
       mac = MAC(key, sequence_number || packet_length || encrypted_packet)
 
 where "packet_length" is encoded as a uint32 and "encrypted_packet"
 contains:
 
       byte      padding_length
       byte[n1]  payload; n1 = packet_length - padding_length - 1
       byte[n2]  random padding; n2 = padding_length
 
 1.6 transport: AES-GCM
 
 OpenSSH supports the AES-GCM algorithm as specified in RFC 5647.
 Because of problems with the specification of the key exchange
 the behaviour of OpenSSH differs from the RFC as follows:
 
 AES-GCM is only negotiated as the cipher algorithms
 "aes128-gcm@openssh.com" or "aes256-gcm@openssh.com" and never as
 an MAC algorithm. Additionally, if AES-GCM is selected as the cipher
 the exchanged MAC algorithms are ignored and there doesn't have to be
 a matching MAC.
 
 1.7 transport: chacha20-poly1305@openssh.com authenticated encryption
 
 OpenSSH supports authenticated encryption using ChaCha20 and Poly1305
 as described in PROTOCOL.chacha20poly1305.
 
 1.8 transport: curve25519-sha256@libssh.org key exchange algorithm
 
 OpenSSH supports the use of ECDH in Curve25519 for key exchange as
 described at:
 http://git.libssh.org/users/aris/libssh.git/plain/doc/curve25519-sha256@libssh.org.txt?h=curve25519
 
 This is identical to curve25519-sha256 as later published in RFC8731.
 
 1.9 transport: ping facility
 
 OpenSSH implements a transport level ping message SSH2_MSG_PING
 and a corresponding SSH2_MSG_PONG reply.
 
 #define SSH2_MSG_PING	192
 #define SSH2_MSG_PONG	193
 
 The ping message is simply:
 
 	byte		SSH_MSG_PING
 	string		data
 
 The reply copies the data (which may be the empty string) from the
 ping:
 
 	byte		SSH_MSG_PONG
 	string		data
 
 Replies are sent in order. They are sent immediately except when rekeying
 is in progress, in which case they are queued until rekeying completes.
 
 The server advertises support for these messages using the
 SSH2_MSG_EXT_INFO mechanism (RFC8308), with the following message:
 
 	string		"ping@openssh.com"
 	string		"0" (version)
 
 The ping/reply message is implemented at the transport layer rather
 than as a named global or channel request to allow pings with very
 short packet lengths, which would not be possible with other
 approaches.
 
-1.9 transport: strict key exchange extension
+1.10 transport: strict key exchange extension
 
 OpenSSH supports a number of transport-layer hardening measures under
 a "strict KEX" feature. This feature is signalled similarly to the
 RFC8308 ext-info feature: by including a additional algorithm in the
-initiial SSH2_MSG_KEXINIT kex_algorithms field. The client may append
+initial SSH2_MSG_KEXINIT kex_algorithms field. The client may append
 "kex-strict-c-v00@openssh.com" to its kex_algorithms and the server
 may append "kex-strict-s-v00@openssh.com". These pseudo-algorithms
 are only valid in the initial SSH2_MSG_KEXINIT and MUST be ignored
 if they are present in subsequent SSH2_MSG_KEXINIT packets.
 
 When an endpoint that supports this extension observes this algorithm
 name in a peer's KEXINIT packet, it MUST make the following changes to
-the the protocol:
-
-a) During initial KEX, terminate the connection if any unexpected or
-   out-of-sequence packet is received. This includes terminating the
-   connection if the first packet received is not SSH2_MSG_KEXINIT.
-   Unexpected packets for the purpose of strict KEX include messages
-   that are otherwise valid at any time during the connection such as
-   SSH2_MSG_DEBUG and SSH2_MSG_IGNORE.
+the protocol:
+
+a) During initial KEX, terminate the connection if out-of-sequence
+   packet or any message that is not strictly required by KEX is
+   received. This includes terminating the connection if the first
+   packet received is not SSH2_MSG_KEXINIT. Unexpected packets for
+   the purpose of strict KEX include messages that are otherwise
+   valid at any time during the connection such as SSH2_MSG_DEBUG,
+   SSH2_MSG_IGNORE or SSH2_MSG_UNIMPLEMENTED.
 b) After sending or receiving a SSH2_MSG_NEWKEYS message, reset the
    packet sequence number to zero. This behaviour persists for the
    duration of the connection (i.e. not just the first
    SSH2_MSG_NEWKEYS).
 
-1.10 transport: SSH2_MSG_EXT_INFO during user authentication
+1.11 transport: SSH2_MSG_EXT_INFO during user authentication
 
 This protocol extension allows the SSH2_MSG_EXT_INFO to be sent
 during user authentication. RFC8308 does allow a second
 SSH2_MSG_EXT_INFO notification, but it may only be sent at the end
 of user authentication and this is too late to signal per-user
 server signature algorithms.
 
 Support for receiving the SSH2_MSG_EXT_INFO message during user
 authentication is signalled by the client including a
 "ext-info-in-auth@openssh.com" key via its initial SSH2_MSG_EXT_INFO
 set after the SSH2_MSG_NEWKEYS message.
 
 A server that supports this extension MAY send a second
 SSH2_MSG_EXT_INFO message any time after the client's first
 SSH2_MSG_USERAUTH_REQUEST, regardless of whether it succeed or fails.
 The client SHOULD be prepared to update the server-sig-algs that
 it received during an earlier SSH2_MSG_EXT_INFO with the later one.
 
 2. Connection protocol changes
 
 2.1. connection: Channel write close extension "eow@openssh.com"
 
 The SSH connection protocol (rfc4254) provides the SSH_MSG_CHANNEL_EOF
 message to allow an endpoint to signal its peer that it will send no
 more data over a channel. Unfortunately, there is no symmetric way for
 an endpoint to request that its peer should cease sending data to it
 while still keeping the channel open for the endpoint to send data to
 the peer.
 
 This is desirable, since it saves the transmission of data that would
 otherwise need to be discarded and it allows an endpoint to signal local
 processes of the condition, e.g. by closing the corresponding file
 descriptor.
 
 OpenSSH implements a channel extension message to perform this
 signalling: "eow@openssh.com" (End Of Write). This message is sent by
 an endpoint when the local output of a session channel is closed or
 experiences a write error. The message is formatted as follows:
 
 	byte		SSH_MSG_CHANNEL_REQUEST
 	uint32		recipient channel
 	string		"eow@openssh.com"
 	boolean		FALSE
 
 On receiving this message, the peer SHOULD cease sending data of
 the channel and MAY signal the process from which the channel data
 originates (e.g. by closing its read file descriptor).
 
 As with the symmetric SSH_MSG_CHANNEL_EOF message, the channel does
 remain open after a "eow@openssh.com" has been sent and more data may
 still be sent in the other direction. This message does not consume
 window space and may be sent even if no window space is available.
 
 NB. due to certain broken SSH implementations aborting upon receipt
 of this message (in contravention of RFC4254 section 5.4), this
 message is only sent to OpenSSH peers (identified by banner).
 Other SSH implementations may be listed to receive this message
 upon request.
 
 2.2. connection: disallow additional sessions extension
      "no-more-sessions@openssh.com"
 
 Most SSH connections will only ever request a single session, but a
 attacker may abuse a running ssh client to surreptitiously open
 additional sessions under their control. OpenSSH provides a global
 request "no-more-sessions@openssh.com" to mitigate this attack.
 
 When an OpenSSH client expects that it will never open another session
 (i.e. it has been started with connection multiplexing disabled), it
 will send the following global request:
 
 	byte		SSH_MSG_GLOBAL_REQUEST
 	string		"no-more-sessions@openssh.com"
 	char		want-reply
 
 On receipt of such a message, an OpenSSH server will refuse to open
 future channels of type "session" and instead immediately abort the
 connection.
 
 Note that this is not a general defence against compromised clients
 (that is impossible), but it thwarts a simple attack.
 
 NB. due to certain broken SSH implementations aborting upon receipt
 of this message, the no-more-sessions request is only sent to OpenSSH
 servers (identified by banner). Other SSH implementations may be
 listed to receive this message upon request.
 
 2.3. connection: Tunnel forward extension "tun@openssh.com"
 
 OpenSSH supports layer 2 and layer 3 tunnelling via the "tun@openssh.com"
 channel type. This channel type supports forwarding of network packets
 with datagram boundaries intact between endpoints equipped with
 interfaces like the BSD tun(4) device. Tunnel forwarding channels are
 requested by the client with the following packet:
 
 	byte		SSH_MSG_CHANNEL_OPEN
 	string		"tun@openssh.com"
 	uint32		sender channel
 	uint32		initial window size
 	uint32		maximum packet size
 	uint32		tunnel mode
 	uint32		remote unit number
 
 The "tunnel mode" parameter specifies whether the tunnel should forward
 layer 2 frames or layer 3 packets. It may take one of the following values:
 
 	SSH_TUNMODE_POINTOPOINT  1		/* layer 3 packets */
 	SSH_TUNMODE_ETHERNET     2		/* layer 2 frames */
 
 The "tunnel unit number" specifies the remote interface number, or may
 be 0x7fffffff to allow the server to automatically choose an interface. A
 server that is not willing to open a client-specified unit should refuse
 the request with a SSH_MSG_CHANNEL_OPEN_FAILURE error. On successful
 open, the server should reply with SSH_MSG_CHANNEL_OPEN_SUCCESS.
 
 Once established the client and server may exchange packet or frames
 over the tunnel channel by encapsulating them in SSH protocol strings
 and sending them as channel data. This ensures that packet boundaries
 are kept intact. Specifically, packets are transmitted using normal
 SSH_MSG_CHANNEL_DATA packets:
 
 	byte		SSH_MSG_CHANNEL_DATA
 	uint32		recipient channel
 	string		data
 
 The contents of the "data" field for layer 3 packets is:
 
 	uint32			packet length
 	uint32			address family
 	byte[packet length - 4]	packet data
 
 The "address family" field identifies the type of packet in the message.
 It may be one of:
 
 	SSH_TUN_AF_INET		2		/* IPv4 */
 	SSH_TUN_AF_INET6	24		/* IPv6 */
 
 The "packet data" field consists of the IPv4/IPv6 datagram itself
 without any link layer header.
 
 The contents of the "data" field for layer 2 packets is:
 
 	uint32			packet length
 	byte[packet length]	frame
 
 The "frame" field contains an IEEE 802.3 Ethernet frame, including
 header.
 
 2.4. connection: Unix domain socket forwarding
 
 OpenSSH supports local and remote Unix domain socket forwarding
 using the "streamlocal" extension.  Forwarding is initiated as per
 TCP sockets but with a single path instead of a host and port.
 
 Similar to direct-tcpip, direct-streamlocal is sent by the client
 to request that the server make a connection to a Unix domain socket.
 
 	byte		SSH_MSG_CHANNEL_OPEN
 	string		"direct-streamlocal@openssh.com"
 	uint32		sender channel
 	uint32		initial window size
 	uint32		maximum packet size
 	string		socket path
 	string		reserved
 	uint32		reserved
 
 Similar to forwarded-tcpip, forwarded-streamlocal is sent by the
 server when the client has previously send the server a streamlocal-forward
 GLOBAL_REQUEST.
 
 	byte		SSH_MSG_CHANNEL_OPEN
 	string		"forwarded-streamlocal@openssh.com"
 	uint32		sender channel
 	uint32		initial window size
 	uint32		maximum packet size
 	string		socket path
 	string		reserved for future use
 
 The reserved field is not currently defined and is ignored on the
 remote end.  It is intended to be used in the future to pass
 information about the socket file, such as ownership and mode.
 The client currently sends the empty string for this field.
 
 Similar to tcpip-forward, streamlocal-forward is sent by the client
 to request remote forwarding of a Unix domain socket.
 
 	byte		SSH2_MSG_GLOBAL_REQUEST
 	string		"streamlocal-forward@openssh.com"
 	boolean		TRUE
 	string		socket path
 
 Similar to cancel-tcpip-forward, cancel-streamlocal-forward is sent
 by the client cancel the forwarding of a Unix domain socket.
 
 	byte		SSH2_MSG_GLOBAL_REQUEST
 	string		"cancel-streamlocal-forward@openssh.com"
 	boolean		FALSE
 	string		socket path
 
 2.5. connection: hostkey update and rotation "hostkeys-00@openssh.com"
 and "hostkeys-prove-00@openssh.com"
 
 OpenSSH supports a protocol extension allowing a server to inform
 a client of all its protocol v.2 host keys after user-authentication
 has completed.
 
 	byte		SSH_MSG_GLOBAL_REQUEST
 	string		"hostkeys-00@openssh.com"
 	char		0 /* want-reply */
 	string[]	hostkeys
 
 Upon receiving this message, a client should check which of the
 supplied host keys are present in known_hosts.
 
 Note that the server may send key types that the client does not
 support. The client should disregard such keys if they are received.
 
 If the client identifies any keys that are not present for the host,
 it should send a "hostkeys-prove@openssh.com" message to request the
 server prove ownership of the private half of the key.
 
 	byte		SSH_MSG_GLOBAL_REQUEST
 	string		"hostkeys-prove-00@openssh.com"
 	char		1 /* want-reply */
 	string[]	hostkeys
 
 When a server receives this message, it should generate a signature
 using each requested key over the following:
 
 	string		"hostkeys-prove-00@openssh.com"
 	string		session identifier
 	string		hostkey
 
 These signatures should be included in the reply, in the order matching
 the hostkeys in the request:
 
 	byte		SSH_MSG_REQUEST_SUCCESS
 	string[]	signatures
 
 When the client receives this reply (and not a failure), it should
 validate the signatures and may update its known_hosts file, adding keys
 that it has not seen before and deleting keys for the server host that
 are no longer offered.
 
 These extensions let a client learn key types that it had not previously
 encountered, thereby allowing it to potentially upgrade from weaker
 key algorithms to better ones. It also supports graceful key rotation:
 a server may offer multiple keys of the same type for a period (to
 give clients an opportunity to learn them using this extension) before
 removing the deprecated key from those offered.
 
 2.6. connection: SIGINFO support for "signal" channel request
 
 The SSH channels protocol (RFC4254 section 6.9) supports sending a
 signal to a session attached to a channel. OpenSSH supports one
 extension signal "INFO@openssh.com" that allows sending SIGINFO on
 BSD-derived systems.
 
 3. Authentication protocol changes
 
 3.1. Host-bound public key authentication
 
 This is trivial change to the traditional "publickey" authentication
 method. The authentication request is identical to the original method
 but for the name and one additional field:
 
 	byte		SSH2_MSG_USERAUTH_REQUEST
 	string		username
 	string		"ssh-connection"
 	string		"publickey-hostbound-v00@openssh.com"
 	bool		has_signature
 	string		pkalg
 	string		public key
 	string		server host key
 
 Because the entire SSH2_MSG_USERAUTH_REQUEST message is included in
 the signed data, this ensures that a binding between the destination
 user, the server identity and the session identifier is visible to the
 signer. OpenSSH uses this binding via signed data to implement per-key
 restrictions in ssh-agent.
 
 A server may advertise this method using the SSH2_MSG_EXT_INFO
 mechanism (RFC8308), with the following message:
 
 	string		"publickey-hostbound@openssh.com"
 	string		"0" (version)
 
 Clients should prefer host-bound authentication when advertised by
 server.
 
 4. SFTP protocol changes
 
 4.1. sftp: Reversal of arguments to SSH_FXP_SYMLINK
 
 When OpenSSH's sftp-server was implemented, the order of the arguments
 to the SSH_FXP_SYMLINK method was inadvertently reversed. Unfortunately,
 the reversal was not noticed until the server was widely deployed. Since
 fixing this to follow the specification would cause incompatibility, the
 current order was retained. For correct operation, clients should send
 SSH_FXP_SYMLINK as follows:
 
 	uint32		id
 	string		targetpath
 	string		linkpath
 
 4.2. sftp: Server extension announcement in SSH_FXP_VERSION
 
 OpenSSH's sftp-server lists the extensions it supports using the
 standard extension announcement mechanism in the SSH_FXP_VERSION server
 hello packet:
 
 	uint32		3		/* protocol version */
 	string		ext1-name
 	string		ext1-version
 	string		ext2-name
 	string		ext2-version
 	...
 	string		extN-name
 	string		extN-version
 
 Each extension reports its integer version number as an ASCII encoded
 string, e.g. "1". The version will be incremented if the extension is
 ever changed in an incompatible way. The server MAY advertise the same
 extension with multiple versions (though this is unlikely). Clients MUST
 check the version number before attempting to use the extension.
 
 4.3. sftp: Extension request "posix-rename@openssh.com"
 
 This operation provides a rename operation with POSIX semantics, which
 are different to those provided by the standard SSH_FXP_RENAME in
 draft-ietf-secsh-filexfer-02.txt. This request is implemented as a
 SSH_FXP_EXTENDED request with the following format:
 
 	uint32		id
 	string		"posix-rename@openssh.com"
 	string		oldpath
 	string		newpath
 
 On receiving this request the server will perform the POSIX operation
 rename(oldpath, newpath) and will respond with a SSH_FXP_STATUS message.
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.4. sftp: Extension requests "statvfs@openssh.com" and
          "fstatvfs@openssh.com"
 
 These requests correspond to the statvfs and fstatvfs POSIX system
 interfaces. The "statvfs@openssh.com" request operates on an explicit
 pathname, and is formatted as follows:
 
 	uint32		id
 	string		"statvfs@openssh.com"
 	string		path
 
 The "fstatvfs@openssh.com" operates on an open file handle:
 
 	uint32		id
 	string		"fstatvfs@openssh.com"
 	string		handle
 
 These requests return a SSH_FXP_STATUS reply on failure. On success they
 return the following SSH_FXP_EXTENDED_REPLY reply:
 
 	uint32		id
 	uint64		f_bsize		/* file system block size */
 	uint64		f_frsize	/* fundamental fs block size */
 	uint64		f_blocks	/* number of blocks (unit f_frsize) */
 	uint64		f_bfree		/* free blocks in file system */
 	uint64		f_bavail	/* free blocks for non-root */
 	uint64		f_files		/* total file inodes */
 	uint64		f_ffree		/* free file inodes */
 	uint64		f_favail	/* free file inodes for to non-root */
 	uint64		f_fsid		/* file system id */
 	uint64		f_flag		/* bit mask of f_flag values */
 	uint64		f_namemax	/* maximum filename length */
 
 The values of the f_flag bitmask are as follows:
 
 	#define SSH_FXE_STATVFS_ST_RDONLY	0x1	/* read-only */
 	#define SSH_FXE_STATVFS_ST_NOSUID	0x2	/* no setuid */
 
 Both the "statvfs@openssh.com" and "fstatvfs@openssh.com" extensions are
 advertised in the SSH_FXP_VERSION hello with version "2".
 
 4.5. sftp: Extension request "hardlink@openssh.com"
 
 This request is for creating a hard link to a regular file. This
 request is implemented as a SSH_FXP_EXTENDED request with the
 following format:
 
 	uint32		id
 	string		"hardlink@openssh.com"
 	string		oldpath
 	string		newpath
 
 On receiving this request the server will perform the operation
 link(oldpath, newpath) and will respond with a SSH_FXP_STATUS message.
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.6. sftp: Extension request "fsync@openssh.com"
 
 This request asks the server to call fsync(2) on an open file handle.
 
 	uint32		id
 	string		"fsync@openssh.com"
 	string		handle
 
 On receiving this request, a server will call fsync(handle_fd) and will
 respond with a SSH_FXP_STATUS message.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.7. sftp: Extension request "lsetstat@openssh.com"
 
 This request is like the "setstat" command, but sets file attributes on
 symlinks.  It is implemented as a SSH_FXP_EXTENDED request with the
 following format:
 
 	uint32		id
 	string		"lsetstat@openssh.com"
 	string		path
 	ATTRS		attrs
 
 See the "setstat" command for more details.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.8. sftp: Extension request "limits@openssh.com"
 
 This request is used to determine various limits the server might impose.
 Clients should not attempt to exceed these limits as the server might sever
 the connection immediately.
 
 	uint32		id
 	string		"limits@openssh.com"
 
 The server will respond with a SSH_FXP_EXTENDED_REPLY reply:
 
 	uint32		id
 	uint64		max-packet-length
 	uint64		max-read-length
 	uint64		max-write-length
 	uint64		max-open-handles
 
 The 'max-packet-length' applies to the total number of bytes in a
 single SFTP packet.  Servers SHOULD set this at least to 34000.
 
 The 'max-read-length' is the largest length in a SSH_FXP_READ packet.
 Even if the client requests a larger size, servers will usually respond
 with a shorter SSH_FXP_DATA packet.  Servers SHOULD set this at least to
 32768.
 
 The 'max-write-length' is the largest length in a SSH_FXP_WRITE packet
 the server will accept.  Servers SHOULD set this at least to 32768.
 
 The 'max-open-handles' is the maximum number of active handles that the
 server allows (e.g. handles created by SSH_FXP_OPEN and SSH_FXP_OPENDIR
 packets).  Servers MAY count internal file handles against this limit
 (e.g. system logging or stdout/stderr), so clients SHOULD NOT expect to
 open this many handles in practice.
 
 If the server doesn't enforce a specific limit, then the field may be
 set to 0.  This implies the server relies on the OS to enforce limits
 (e.g. available memory or file handles), and such limits might be
 dynamic.  The client SHOULD take care to not try to exceed reasonable
 limits.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.9. sftp: Extension request "expand-path@openssh.com"
 
 This request supports canonicalisation of relative paths and
 those that need tilde-expansion, i.e. "~", "~/..." and "~user/..."
 These paths are expanded using shell-like rules and the resultant
 path is canonicalised similarly to SSH2_FXP_REALPATH.
 
 It is implemented as a SSH_FXP_EXTENDED request with the following
 format:
 
 	uint32		id
 	string		"expand-path@openssh.com"
 	string		path
 
 Its reply is the same format as that of SSH2_FXP_REALPATH.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 4.10. sftp: Extension request "copy-data"
 
 This request asks the server to copy data from one open file handle and
 write it to a different open file handle.  This avoids needing to transfer
 the data across the network twice (a download followed by an upload).
 
 	byte		SSH_FXP_EXTENDED
 	uint32		id
 	string		"copy-data"
 	string		read-from-handle
 	uint64		read-from-offset
 	uint64		read-data-length
 	string		write-to-handle
 	uint64		write-to-offset
 
 The server will copy read-data-length bytes starting from
 read-from-offset from the read-from-handle and write them to
 write-to-handle starting from write-to-offset, and then respond with a
 SSH_FXP_STATUS message.
 
 It's equivalent to issuing a series of SSH_FXP_READ requests on
 read-from-handle and a series of requests of SSH_FXP_WRITE on
 write-to-handle.
 
 If read-from-handle and write-to-handle are the same, the server will
 fail the request and respond with a SSH_FX_INVALID_PARAMETER message.
 
 If read-data-length is 0, then the server will read data from the
 read-from-handle until EOF is reached.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 This request is identical to the "copy-data" request documented in:
 
 https://tools.ietf.org/html/draft-ietf-secsh-filexfer-extensions-00#section-7
 
 4.11. sftp: Extension request "home-directory"
 
 This request asks the server to expand the specified user's home directory.
 An empty username implies the current user.  This can be used by the client
 to expand ~/ type paths locally.
 
 	byte		SSH_FXP_EXTENDED
 	uint32		id
 	string		"home-directory"
 	string		username
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 This provides similar information as the "expand-path@openssh.com" extension.
 
 This request is identical to the "home-directory" request documented in:
 
 https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-extensions-00#section-5
 
 4.12. sftp: Extension request "users-groups-by-id@openssh.com"
 
 This request asks the server to return user and/or group names that
 correspond to one or more IDs (e.g. as returned from a SSH_FXP_STAT
 request). This may be used by the client to provide usernames in
 directory listings.
 
 	byte		SSH_FXP_EXTENDED
 	uint32		id
 	string		"users-groups-by-id@openssh.com"
 	string		uids
 	string		gids
 
 Where "uids" and "gids" consists of one or more integer user or group
 identifiers:
 
 	uint32		id-0
 	...
 
 The server will reply with a SSH_FXP_EXTENDED_REPLY:
 
 	byte		SSH_FXP_EXTENDED_REPLY
+	uint32		id
 	string		usernames
 	string		groupnames
 
 Where "username" and "groupnames" consists of names in identical request
 order to "uids" and "gids" respectively:
 
 	string		name-0
 	...
 
 If a name cannot be identified for a given user or group ID, an empty
 string will be returned in its place.
 
 It is acceptable for either "uids" or "gids" to be an empty set, in
 which case the respective "usernames" or "groupnames" list will also
 be empty.
 
 This extension is advertised in the SSH_FXP_VERSION hello with version
 "1".
 
 5. Miscellaneous changes
 
 5.1 Public key format
 
 OpenSSH public keys, as generated by ssh-keygen(1) and appearing in
 authorized_keys files, are formatted as a single line of text consisting
 of the public key algorithm name followed by a base64-encoded key blob.
 The public key blob (before base64 encoding) is the same format used for
 the encoding of public keys sent on the wire: as described in RFC4253
 section 6.6 for RSA and DSA keys, RFC5656 section 3.1 for ECDSA keys
 and the "New public key formats" section of PROTOCOL.certkeys for the
 OpenSSH certificate formats.
 
 5.2 Private key format
 
 OpenSSH private keys, as generated by ssh-keygen(1) use the format
 described in PROTOCOL.key by default. As a legacy option, PEM format
 (RFC7468) private keys are also supported for RSA, DSA and ECDSA keys
 and were the default format before OpenSSH 7.8.
 
 5.3 KRL format
 
 OpenSSH supports a compact format for Key Revocation Lists (KRLs). This
 format is described in the PROTOCOL.krl file.
 
 5.4 Connection multiplexing
 
 OpenSSH's connection multiplexing uses messages as described in
 PROTOCOL.mux over a Unix domain socket for communications between a
 master instance and later clients.
 
 5.5. Agent protocol extensions
 
 OpenSSH extends the usual agent protocol. These changes are documented
 in the PROTOCOL.agent file.
 
-$OpenBSD: PROTOCOL,v 1.51 2023/12/18 14:45:49 djm Exp $
+$OpenBSD: PROTOCOL,v 1.55 2024/01/08 05:05:15 djm Exp $
diff --git a/PROTOCOL.agent b/PROTOCOL.agent
index e4a6b74c50b5..7637882f12b3 100644
--- a/PROTOCOL.agent
+++ b/PROTOCOL.agent
@@ -1,115 +1,115 @@
 The SSH agent protocol is described in
 https://tools.ietf.org/html/draft-miller-ssh-agent
 
 This file documents OpenSSH's extensions to the agent protocol.
 
 1. session-bind@openssh.com extension
 
 This extension allows a ssh client to bind an agent connection to a
 particular SSH session identifier as derived from the initial key
 exchange (as per RFC4253 section 7.2) and the host key used for that
 exchange. This binding is verifiable at the agent by including the
 initial KEX signature made by the host key.
 
 The message format is:
 
 	byte		SSH_AGENTC_EXTENSION (0x1b)
 	string		session-bind@openssh.com
 	string		hostkey
 	string		session identifier
 	string		signature
 	bool		is_forwarding
 
 Where 'hostkey' is the encoded server host public key, 'session
 identifier' is the exchange hash derived from the initial key
 exchange, 'signature' is the server's signature of the session
 identifier using the private hostkey, as sent in the final
 SSH2_MSG_KEXDH_REPLY/SSH2_MSG_KEXECDH_REPLY message of the initial key
 exchange. 'is_forwarding' is a flag indicating whether this connection
 should be bound for user authentication or forwarding.
 
 When an agent received this message, it will verify the signature and
 check the consistency of its contents, including refusing to accept
 a duplicate session identifier, or any attempt to bind a connection
 previously bound for authentication. It will then record the
 binding for the life of the connection for use later in testing per-key
 destination constraints.
 
 2. restrict-destination-v00@openssh.com key constraint extension
 
 The key constraint extension supports destination- and forwarding path-
 restricted keys. It may be attached as a constraint when keys or
 smartcard keys are added to an agent.
 
 	byte		SSH_AGENT_CONSTRAIN_EXTENSION (0xff)
 	string		restrict-destination-v00@openssh.com
 	constraint[]	constraints
 
 Where a constraint consists of:
 
 	string		from_username (must be empty)
 	string		from_hostname
 	keyspec[]	from_hostkeys
 	string		to_username
 	string		to_hostname
 	keyspec[]	to_hostkeys
 
 And a keyspec consists of:
 
 	string		keyblob
 	bool		is_ca
 
 When receiving this message, the agent will ensure that the
 'from_username' field is empty, and that 'to_hostname' and 'to_hostkeys'
 have been supplied (empty 'from_hostname' and 'from_hostkeys' are valid
 and signify the initial hop from the host running ssh-agent). The agent
 will then record the constraint against the key.
 
 Subsequent operations on this key including add/remove/request
 identities and, in particular, signature requests will check the key
 constraints against the session-bind@openssh.com bindings recorded for
 the agent connection over which they were received.
 
 3. SSH_AGENT_CONSTRAIN_MAXSIGN key constraint
 
 This key constraint allows communication to an agent of the maximum
 number of signatures that may be made with an XMSS key. The format of
 the constraint is:
 
 	byte		SSH_AGENT_CONSTRAIN_MAXSIGN (0x03)
 	uint32		max_signatures
 
 This option is only valid for XMSS keys.
 
 3. associated-certs-v00@openssh.com key constraint extension
 
 The key constraint extension allows certificates to be associated
 with private keys as they are loaded from a PKCS#11 token.
 
 	byte		SSH_AGENT_CONSTRAIN_EXTENSION (0xff)
 	string		associated-certs-v00@openssh.com
 	bool		certs_only
 	string		certsblob
 
-Where "certsblob" constists of one or more certificates encoded as public
+Where "certsblob" consists of one or more certificates encoded as public
 key blobs:
 
 	string[]	certificates
 
 This extension is only valid for SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED
 requests. When an agent receives this extension, it will attempt to match
 each certificate in the request with a corresponding private key loaded
 from the requested PKCS#11 token. When a matching key is found, the
 agent will graft the certificate contents to the token-hosted private key
 and store the result for subsequent use by regular agent operations.
 
 If the "certs_only" flag is set, then this extension will cause ONLY
 the resultant certificates to be loaded to the agent. The default
 behaviour is to load the PKCS#11-hosted private key as well as the
 resultant certificate.
 
 A SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED will return SSH_AGENT_SUCCESS
 if any key (plain private or certificate) was successfully loaded, or
 SSH_AGENT_FAILURE if no key was loaded.
 
-$OpenBSD: PROTOCOL.agent,v 1.21 2023/12/18 14:46:56 djm Exp $
+$OpenBSD: PROTOCOL.agent,v 1.22 2023/12/20 00:06:25 jsg Exp $
diff --git a/PROTOCOL.mux b/PROTOCOL.mux
index 5a3dd5fe04d7..fef2e13d436f 100644
--- a/PROTOCOL.mux
+++ b/PROTOCOL.mux
@@ -1,298 +1,296 @@
 This document describes the multiplexing protocol used by ssh(1)'s
 ControlMaster connection-sharing.
 
 Multiplexing starts with a ssh(1) configured to act as a multiplexing
 master. This will cause ssh(1) to listen on a Unix domain socket for
 requests from clients. Clients communicate over this socket using a
 simple packetised protocol, where each message is proceeded with
 a length and message type in SSH uint32 wire format:
 
     uint32  packet length
     uint32  packet type
     ...     packet body
 
 Most messages from the client to the server contain a "request id"
 field. This field is returned in replies as "client request id" to
 facilitate matching of responses to requests.
 
 Many multiplexing (mux) client requests yield immediate responses from
 the mux process; requesting a forwarding, performing an alive check or
 requesting the master terminate itself fall in to this category.
 
 The most common use of multiplexing however is to maintain multiple
 concurrent sessions. These are supported via two separate modes:
 
 "Passenger" clients start by requesting a new session with a
 MUX_C_NEW_SESSION message and passing stdio file descriptors over the
 Unix domain control socket. The passenger client then waits until it is
 signaled or the mux server closes the session. This mode is so named as
 the client waits around while the mux server does all the driving.
 
 Stdio forwarding (requested using MUX_C_NEW_STDIO_FWD) is another
 example of passenger mode; the client passes the stdio file descriptors
 and passively waits for something to happen.
 
 "Proxy" clients, requested using MUX_C_PROXY, work quite differently. In
 this mode, the mux client/server connection socket will stop speaking
 the multiplexing protocol and start proxying SSH connection protocol
 messages between the client and server. The client therefore must
 speak a significant subset of the SSH protocol, but in return is able
 to access basically the full suite of connection protocol features.
 Moreover, as no file descriptor passing is required, the connection
 supporting a proxy client may itself be forwarded or relayed to another
 host if necessary.
 
 1. Connection setup
 
 When a multiplexing connection is made to a ssh(1) operating as a
 ControlMaster from a client ssh(1), the first action of each is send
 a hello messages to its peer:
 
 	uint32	MUX_MSG_HELLO
 	uint32  protocol version
 	string  extension name [optional]
 	string  extension value [optional]
 	...
 
 The current version of the mux protocol is 4. A client should refuse
 to connect to a master that speaks an unsupported protocol version.
 
 Following the version identifier are zero or more extensions represented
 as a name/value pair. No extensions are currently defined.
 
 2. Opening a passenger mode session
 
 To open a new multiplexed session in passenger mode, a client sends the
 following request:
 
 	uint32	MUX_C_NEW_SESSION
 	uint32  request id
 	string	reserved
 	bool	want tty flag
 	bool	want X11 forwarding flag
 	bool	want agent flag
 	bool	subsystem flag
 	uint32	escape char
 	string	terminal type
 	string	command
 	string	environment string 0 [optional]
 	...
 
 To disable the use of an escape character, "escape char" may be set
 to 0xffffffff. "terminal type" is generally set to the value of
 $TERM. zero or more environment strings may follow the command.
 
 The client then sends its standard input, output and error file
 descriptors (in that order) using Unix domain socket control messages.
 
 The contents of "reserved" are currently ignored.
 
 If successful, the server will reply with MUX_S_SESSION_OPENED
 
 	uint32	MUX_S_SESSION_OPENED
 	uint32	client request id
 	uint32	session id
 
 Otherwise it will reply with an error: MUX_S_PERMISSION_DENIED or
 MUX_S_FAILURE.
 
 Once the server has received the fds, it will respond with MUX_S_OK
 indicating that the session is up. The client now waits for the
 session to end. When it does, the server will send an exit status
 message:
 
 	uint32	MUX_S_EXIT_MESSAGE
 	uint32	session id
 	uint32	exit value
 
 The client should exit with this value to mimic the behaviour of a
 non-multiplexed ssh(1) connection. Two additional cases that the
 client must cope with are it receiving a signal itself and the
 server disconnecting without sending an exit message.
 
 A master may also send a MUX_S_TTY_ALLOC_FAIL before MUX_S_EXIT_MESSAGE
 if remote TTY allocation was unsuccessful. The client may use this to
 return its local tty to "cooked" mode.
 
 	uint32	MUX_S_TTY_ALLOC_FAIL
 	uint32	session id
 
 3. Requesting passenger-mode stdio forwarding
 
 A client may request the master to establish a stdio forwarding:
 
 	uint32	MUX_C_NEW_STDIO_FWD
 	uint32	request id
 	string	reserved
 	string	connect host
 	string	connect port
 
 The client then sends its standard input and output file descriptors
 (in that order) using Unix domain socket control messages.
 
 The contents of "reserved" are currently ignored.
 
 A server may reply with a MUX_S_SESSION_OPENED, a MUX_S_PERMISSION_DENIED
 or a MUX_S_FAILURE.
 
 4. Health checks
 
 The client may request a health check/PID report from a server:
 
 	uint32	MUX_C_ALIVE_CHECK
 	uint32	request id
 
 The server replies with:
 
 	uint32	MUX_S_ALIVE
 	uint32	client request id
 	uint32	server pid
 
 5. Remotely terminating a master
 
 A client may request that a master terminate immediately:
 
 	uint32	MUX_C_TERMINATE
 	uint32	request id
 
 The server will reply with one of MUX_S_OK or MUX_S_PERMISSION_DENIED.
 
 6. Requesting establishment of port forwards
 
 A client may request the master to establish a port forward:
 
 	uint32	MUX_C_OPEN_FWD
 	uint32	request id
 	uint32	forwarding type
 	string	listen host
 	uint32	listen port
 	string	connect host
 	uint32	connect port
 
 forwarding type may be MUX_FWD_LOCAL, MUX_FWD_REMOTE, MUX_FWD_DYNAMIC.
 
 If listen port is (unsigned int) -2, then the listen host is treated as
 a unix socket path name.
 
 If connect port is (unsigned int) -2, then the connect host is treated
 as a unix socket path name.
 
 A server may reply with a MUX_S_OK, a MUX_S_REMOTE_PORT, a
 MUX_S_PERMISSION_DENIED or a MUX_S_FAILURE.
 
 For dynamically allocated listen port the server replies with
 
 	uint32	MUX_S_REMOTE_PORT
 	uint32	client request id
 	uint32	allocated remote listen port
 
 7. Requesting closure of port forwards
 
-Note: currently unimplemented (server will always reply with MUX_S_FAILURE).
-
 A client may request the master to close a port forward:
 
 	uint32	MUX_C_CLOSE_FWD
 	uint32	request id
 	uint32	forwarding type
 	string	listen host
 	uint32	listen port
 	string	connect host
 	uint32	connect port
 
 A server may reply with a MUX_S_OK, a MUX_S_PERMISSION_DENIED or a
 MUX_S_FAILURE.
 
 8. Requesting shutdown of mux listener
 
 A client may request the master to stop accepting new multiplexing requests
 and remove its listener socket.
 
 	uint32	MUX_C_STOP_LISTENING
 	uint32	request id
 
 A server may reply with a MUX_S_OK, a MUX_S_PERMISSION_DENIED or a
 MUX_S_FAILURE.
 
 9. Requesting proxy mode
 
 A client may request that the control connection be placed in proxy
 mode:
 
 	uint32	MUX_C_PROXY
 	uint32	request id
 
 When a mux master receives this message, it will reply with a
 confirmation:
 
 	uint32	MUX_S_PROXY
 	uint32	request id
 
 And go into proxy mode. All subsequent data over the connection will
 be formatted as unencrypted, unpadded, SSH transport messages:
 
 	uint32	packet length
 	byte	0 (padding length)
 	byte	packet type
 	byte[packet length - 2] ...
 
 The mux master will accept most connection messages and global requests,
 and will translate channel identifiers to ensure that the proxy client has
 globally unique channel numbers (i.e. a proxy client need not worry about
 collisions with other clients).
 
 10. Status messages
 
 The MUX_S_OK message is empty:
 
 	uint32	MUX_S_OK
 	uint32	client request id
 
 The MUX_S_PERMISSION_DENIED and MUX_S_FAILURE include a reason:
 
 	uint32	MUX_S_PERMISSION_DENIED
 	uint32	client request id
 	string	reason
 
 	uint32	MUX_S_FAILURE
 	uint32	client request id
 	string	reason
 
 11. Protocol numbers
 
 #define MUX_MSG_HELLO		0x00000001
 #define MUX_C_NEW_SESSION	0x10000002
 #define MUX_C_ALIVE_CHECK	0x10000004
 #define MUX_C_TERMINATE		0x10000005
 #define MUX_C_OPEN_FWD		0x10000006
 #define MUX_C_CLOSE_FWD		0x10000007
 #define MUX_C_NEW_STDIO_FWD	0x10000008
 #define MUX_C_STOP_LISTENING	0x10000009
 #define MUX_S_OK		0x80000001
 #define MUX_S_PERMISSION_DENIED	0x80000002
 #define MUX_S_FAILURE		0x80000003
 #define MUX_S_EXIT_MESSAGE	0x80000004
 #define MUX_S_ALIVE		0x80000005
 #define MUX_S_SESSION_OPENED	0x80000006
 #define MUX_S_REMOTE_PORT	0x80000007
 #define MUX_S_TTY_ALLOC_FAIL	0x80000008
 
 #define MUX_FWD_LOCAL	1
 #define MUX_FWD_REMOTE	2
 #define MUX_FWD_DYNAMIC	3
 
 XXX TODO
 XXX extended status (e.g. report open channels / forwards)
 XXX lock (maybe)
 XXX watch in/out traffic (pre/post crypto)
 XXX inject packet (what about replies)
 XXX server->client error/warning notifications
 XXX send signals via mux
 XXX ^Z support in passengers
 XXX extensions for multi-agent
 XXX extensions for multi-X11
 XXX session inspection via master
 XXX signals via mux request
 XXX list active connections via mux
 
-$OpenBSD: PROTOCOL.mux,v 1.13 2022/01/01 01:55:30 jsg Exp $
+$OpenBSD: PROTOCOL.mux,v 1.14 2024/01/08 05:11:18 djm Exp $
diff --git a/README b/README
index 327562671c8d..89981ef6f435 100644
--- a/README
+++ b/README
@@ -1,53 +1,53 @@
-See https://www.openssh.com/releasenotes.html#9.6p1 for the release
+See https://www.openssh.com/releasenotes.html#9.7p1 for the release
 notes.
 
 Please read https://www.openssh.com/report.html for bug reporting
 instructions and note that we do not use Github for bug reporting or
 patch/pull-request management.
 
 This is the port of OpenBSD's excellent OpenSSH[0] to Linux and other
 Unices.
 
 OpenSSH is based on the last free version of Tatu Ylonen's sample
 implementation with all patent-encumbered algorithms removed (to
 external libraries), all known security bugs fixed, new features
 reintroduced and many other clean-ups.  OpenSSH has been created by
 Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo de Raadt,
 and Dug Song. It has a homepage at https://www.openssh.com/
 
 This port consists of the re-introduction of autoconf support, PAM
 support, EGD/PRNGD support and replacements for OpenBSD library
 functions that are (regrettably) absent from other unices. This port
 has been best tested on AIX, Cygwin, HP-UX, Linux, MacOS/X,
 FreeBSD, NetBSD, OpenBSD, OpenServer, Solaris and UnixWare.
 
 This version actively tracks changes in the OpenBSD CVS repository.
 
 The PAM support is now more functional than the popular packages of
 commercial ssh-1.2.x. It checks "account" and "session" modules for
 all logins, not just when using password authentication.
 
 There is now several mailing lists for this port of OpenSSH. Please
 refer to https://www.openssh.com/list.html for details on how to join.
 
 Please send bug reports and patches to https://bugzilla.mindrot.org or
 the mailing list openssh-unix-dev@mindrot.org.  To mitigate spam, the
 list only allows posting from subscribed addresses.  Code contribution
 are welcomed, but please follow the OpenBSD style guidelines[1].
 
 Please refer to the INSTALL document for information on dependencies and
 how to install OpenSSH on your system.
 
 Damien Miller <djm@mindrot.org>
 
 Miscellania -
 
 This version of OpenSSH is based upon code retrieved from the OpenBSD CVS
 repository which in turn was based on the last free sample implementation
 released by Tatu Ylonen.
 
 References -
 
 [0] https://www.openssh.com/
 [1] https://man.openbsd.org/style.9
 
diff --git a/README.platform b/README.platform
index 7b754ba42a10..4edf9d1f5937 100644
--- a/README.platform
+++ b/README.platform
@@ -1,96 +1,97 @@
 This file contains notes about OpenSSH on specific platforms.
 
 AIX
 
 Beginning with OpenSSH 3.8p1, sshd will honour an account's password
 expiry settings, where prior to that it did not.  Because of this,
 it's possible for sites that have used OpenSSH's sshd exclusively to
 have accounts which have passwords expired longer than the inactive time
 (ie the "Weeks between password EXPIRATION and LOCKOUT" setting in SMIT
 or the maxexpired chuser attribute).
 
 Accounts in this state must have their passwords reset manually by the
 administrator.  As a precaution, it is recommended that the administrative
 passwords be reset before upgrading from OpenSSH <3.8.
 
 As of OpenSSH 4.0p1, configure will attempt to detect if your version
 and maintenance level of AIX has a working getaddrinfo, and will use it
 if found.  This will enable IPv6 support.  If for some reason configure
 gets it wrong, or if you want to build binaries to work on earlier MLs
 than the build host then you can add "-DBROKEN_GETADDRINFO" to CFLAGS
 to force the previous IPv4-only behaviour.
 
 IPv6 known to work: 5.1ML7 5.2ML2 5.2ML5
 IPv6 known broken: 4.3.3ML11 5.1ML4
 
 If you wish to use dynamic libraries that aren't in the normal system
 locations (eg IBM's OpenSSL and zlib packages) then you will need to
 define the environment variable blibpath before running configure, eg
 
 blibpath=/lib:/usr/lib:/opt/freeware/lib ./configure \
   --with-ssl-dir=/opt/freeware --with-zlib=/opt/freeware
 
 If sshd is built with the WITH_AIXAUTHENTICATE option (which is enabled
 by default) then sshd checks that users are permitted via the
 loginrestrictions() function, in particular that the user has the
 "rlogin" attribute set.  This check is not done for the root account,
 instead the PermitRootLogin setting in sshd_config is used.
 
 If you are using the IBM compiler you probably want to use CC=xlc rather
 than the default of cc.
 
 
 Cygwin
 ------
 To build on Cygwin, OpenSSH requires the following packages:
 gcc, gcc-mingw-core, mingw-runtime, binutils, make, openssl,
 openssl-devel, zlib, minres, minires-devel.
 
 
 Darwin and MacOS X
 ------------------
 Darwin does not provide a tun(4) driver required for OpenSSH-based
 virtual private networks. The BSD manpage still exists, but the driver
 has been removed in recent releases of Darwin and MacOS X.
 
-Nevertheless, tunnel support is known to work with Darwin 8 and
-MacOS X 10.4 in Point-to-Point (Layer 3) and Ethernet (Layer 2) mode
-using a third party driver. More information is available at:
-	http://www-user.rhrk.uni-kl.de/~nissler/tuntap/
+Tunnel support is known to work with Darwin 8 and MacOS X 10.4 in
+Point-to-Point (Layer 3) and Ethernet (Layer 2) mode using a third
+party driver. More information is available at:
+	https://tuntaposx.sourceforge.net
 
+Recent Darwin/MacOS X versions are likely unsupported.
 
 Linux
 -----
 
 Some Linux distributions (including Red Hat/Fedora/CentOS) include
 headers and library links in the -devel RPMs rather than the main
 binary RPMs. If you get an error about headers, or complaining about a
 missing prerequisite then you may need to install the equivalent
 development packages.  On Redhat based distros these may be openssl-devel,
 zlib-devel and pam-devel, on Debian based distros these may be
 libssl-dev, libz-dev and libpam-dev.
 
 
 Solaris
 -------
 If you enable BSM auditing on Solaris, you need to update audit_event(4)
 for praudit(1m) to give sensible output.  The following line needs to be
 added to /etc/security/audit_event:
 
 	32800:AUE_openssh:OpenSSH login:lo
 
 The BSM audit event range available for third party TCB applications is
 32768 - 65535.  Event number 32800 has been chosen for AUE_openssh.
 There is no official registry of 3rd party event numbers, so if this
 number is already in use on your system, you may change it at build time
 by configure'ing --with-cflags=-DAUE_openssh=32801 then rebuilding.
 
 
 Platforms using PAM
 -------------------
 As of OpenSSH 4.3p1, sshd will no longer check /etc/nologin itself when
 PAM is enabled.  To maintain existing behaviour, pam_nologin should be
 added to sshd's session stack which will prevent users from starting shell
 sessions.  Alternatively, pam_nologin can be added to either the auth or
 account stacks which will prevent authentication entirely, but will still
 return the output from pam_nologin to the client.
diff --git a/channels.c b/channels.c
index 20f31dadd782..ece8d30d614b 100644
--- a/channels.c
+++ b/channels.c
@@ -1,5317 +1,5356 @@
-/* $OpenBSD: channels.c,v 1.435 2023/12/18 14:47:20 djm Exp $ */
+/* $OpenBSD: channels.c,v 1.437 2024/03/06 02:59:59 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * This file contains functions for generic socket connection forwarding.
  * There is also code for initiating connection forwarding for X11 connections,
  * arbitrary tcp/ip connections, and the authentication agent connection.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * SSH2 support added by Markus Friedl.
  * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  * Copyright (c) 1999 Dug Song.  All rights reserved.
  * Copyright (c) 1999 Theo de Raadt.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <sys/un.h>
 #include <sys/socket.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <netdb.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <stdarg.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>
 
 #include "openbsd-compat/sys-queue.h"
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "ssherr.h"
 #include "sshbuf.h"
 #include "packet.h"
 #include "log.h"
 #include "misc.h"
 #include "channels.h"
 #include "compat.h"
 #include "canohost.h"
 #include "sshkey.h"
 #include "authfd.h"
 #include "pathnames.h"
 #include "match.h"
 
 /* XXX remove once we're satisfied there's no lurking bugs */
 /* #define DEBUG_CHANNEL_POLL 1 */
 
 /* -- agent forwarding */
 #define	NUM_SOCKS	10
 
 /* -- tcp forwarding */
 /* special-case port number meaning allow any port */
 #define FWD_PERMIT_ANY_PORT	0
 
 /* special-case wildcard meaning allow any host */
 #define FWD_PERMIT_ANY_HOST	"*"
 
 /* -- X11 forwarding */
 /* Maximum number of fake X11 displays to try. */
 #define MAX_DISPLAYS  1000
 
 /* Per-channel callback for pre/post IO actions */
 typedef void chan_fn(struct ssh *, Channel *c);
 
 /*
  * Data structure for storing which hosts are permitted for forward requests.
  * The local sides of any remote forwards are stored in this array to prevent
  * a corrupt remote server from accessing arbitrary TCP/IP ports on our local
  * network (which might be behind a firewall).
  */
 /* XXX: streamlocal wants a path instead of host:port */
 /*      Overload host_to_connect; we could just make this match Forward */
 /*	XXX - can we use listen_host instead of listen_path? */
 struct permission {
 	char *host_to_connect;		/* Connect to 'host'. */
 	int port_to_connect;		/* Connect to 'port'. */
 	char *listen_host;		/* Remote side should listen address. */
 	char *listen_path;		/* Remote side should listen path. */
 	int listen_port;		/* Remote side should listen port. */
 	Channel *downstream;		/* Downstream mux*/
 };
 
 /*
  * Stores the forwarding permission state for a single direction (local or
  * remote).
  */
 struct permission_set {
 	/*
 	 * List of all local permitted host/port pairs to allow for the
 	 * user.
 	 */
 	u_int num_permitted_user;
 	struct permission *permitted_user;
 
 	/*
 	 * List of all permitted host/port pairs to allow for the admin.
 	 */
 	u_int num_permitted_admin;
 	struct permission *permitted_admin;
 
 	/*
 	 * If this is true, all opens/listens are permitted.  This is the
 	 * case on the server on which we have to trust the client anyway,
 	 * and the user could do anything after logging in.
 	 */
 	int all_permitted;
 };
 
 /* Used to record timeouts per channel type */
 struct ssh_channel_timeout {
 	char *type_pattern;
 	int timeout_secs;
 };
 
 /* Master structure for channels state */
 struct ssh_channels {
 	/*
 	 * Pointer to an array containing all allocated channels.  The array
 	 * is dynamically extended as needed.
 	 */
 	Channel **channels;
 
 	/*
 	 * Size of the channel array.  All slots of the array must always be
 	 * initialized (at least the type field); unused slots set to NULL
 	 */
 	u_int channels_alloc;
 
 	/*
 	 * 'channel_pre*' are called just before IO to add any bits
 	 * relevant to channels in the c->io_want bitmasks.
 	 *
 	 * 'channel_post*': perform any appropriate operations for
 	 * channels which have c->io_ready events pending.
 	 */
 	chan_fn **channel_pre;
 	chan_fn **channel_post;
 
 	/* -- tcp forwarding */
 	struct permission_set local_perms;
 	struct permission_set remote_perms;
 
 	/* -- X11 forwarding */
 
 	/* Saved X11 local (client) display. */
 	char *x11_saved_display;
 
 	/* Saved X11 authentication protocol name. */
 	char *x11_saved_proto;
 
 	/* Saved X11 authentication data.  This is the real data. */
 	char *x11_saved_data;
 	u_int x11_saved_data_len;
 
 	/* Deadline after which all X11 connections are refused */
 	time_t x11_refuse_time;
 
 	/*
 	 * Fake X11 authentication data.  This is what the server will be
 	 * sending us; we should replace any occurrences of this by the
 	 * real data.
 	 */
 	u_char *x11_fake_data;
 	u_int x11_fake_data_len;
 
 	/* AF_UNSPEC or AF_INET or AF_INET6 */
 	int IPv4or6;
 
 	/* Channel timeouts by type */
 	struct ssh_channel_timeout *timeouts;
 	size_t ntimeouts;
+	/* Global timeout for all OPEN channels */
+	int global_deadline;
+	time_t lastused;
 };
 
 /* helper */
 static void port_open_helper(struct ssh *ssh, Channel *c, char *rtype);
 static const char *channel_rfwd_bind_host(const char *listen_host);
 
 /* non-blocking connect helpers */
 static int connect_next(struct channel_connect *);
 static void channel_connect_ctx_free(struct channel_connect *);
 static Channel *rdynamic_connect_prepare(struct ssh *, char *, char *);
 static int rdynamic_connect_finish(struct ssh *, Channel *);
 
 /* Setup helper */
 static void channel_handler_init(struct ssh_channels *sc);
 
 /* -- channel core */
 
 void
 channel_init_channels(struct ssh *ssh)
 {
 	struct ssh_channels *sc;
 
 	if ((sc = calloc(1, sizeof(*sc))) == NULL)
 		fatal_f("allocation failed");
 	sc->channels_alloc = 10;
 	sc->channels = xcalloc(sc->channels_alloc, sizeof(*sc->channels));
 	sc->IPv4or6 = AF_UNSPEC;
 	channel_handler_init(sc);
 
 	ssh->chanctxt = sc;
 }
 
 Channel *
 channel_by_id(struct ssh *ssh, int id)
 {
 	Channel *c;
 
 	if (id < 0 || (u_int)id >= ssh->chanctxt->channels_alloc) {
 		logit_f("%d: bad id", id);
 		return NULL;
 	}
 	c = ssh->chanctxt->channels[id];
 	if (c == NULL) {
 		logit_f("%d: bad id: channel free", id);
 		return NULL;
 	}
 	return c;
 }
 
 Channel *
 channel_by_remote_id(struct ssh *ssh, u_int remote_id)
 {
 	Channel *c;
 	u_int i;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c != NULL && c->have_remote_id && c->remote_id == remote_id)
 			return c;
 	}
 	return NULL;
 }
 
 /*
  * Returns the channel if it is allowed to receive protocol messages.
  * Private channels, like listening sockets, may not receive messages.
  */
 Channel *
 channel_lookup(struct ssh *ssh, int id)
 {
 	Channel *c;
 
 	if ((c = channel_by_id(ssh, id)) == NULL)
 		return NULL;
 
 	switch (c->type) {
 	case SSH_CHANNEL_X11_OPEN:
 	case SSH_CHANNEL_LARVAL:
 	case SSH_CHANNEL_CONNECTING:
 	case SSH_CHANNEL_DYNAMIC:
 	case SSH_CHANNEL_RDYNAMIC_OPEN:
 	case SSH_CHANNEL_RDYNAMIC_FINISH:
 	case SSH_CHANNEL_OPENING:
 	case SSH_CHANNEL_OPEN:
 	case SSH_CHANNEL_ABANDONED:
 	case SSH_CHANNEL_MUX_PROXY:
 		return c;
 	}
 	logit("Non-public channel %d, type %d.", id, c->type);
 	return NULL;
 }
 
 /*
  * Add a timeout for open channels whose c->ctype (or c->xctype if it is set)
  * match type_pattern.
  */
 void
 channel_add_timeout(struct ssh *ssh, const char *type_pattern,
     int timeout_secs)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 
+	if (strcmp(type_pattern, "global") == 0) {
+		debug2_f("global channel timeout %d seconds", timeout_secs);
+		sc->global_deadline = timeout_secs;
+		return;
+	}
 	debug2_f("channel type \"%s\" timeout %d seconds",
 	    type_pattern, timeout_secs);
 	sc->timeouts = xrecallocarray(sc->timeouts, sc->ntimeouts,
 	    sc->ntimeouts + 1, sizeof(*sc->timeouts));
 	sc->timeouts[sc->ntimeouts].type_pattern = xstrdup(type_pattern);
 	sc->timeouts[sc->ntimeouts].timeout_secs = timeout_secs;
 	sc->ntimeouts++;
 }
 
 /* Clears all previously-added channel timeouts */
 void
 channel_clear_timeouts(struct ssh *ssh)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	size_t i;
 
 	debug3_f("clearing");
 	for (i = 0; i < sc->ntimeouts; i++)
 		free(sc->timeouts[i].type_pattern);
 	free(sc->timeouts);
 	sc->timeouts = NULL;
 	sc->ntimeouts = 0;
 }
 
 static int
 lookup_timeout(struct ssh *ssh, const char *type)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	size_t i;
 
 	for (i = 0; i < sc->ntimeouts; i++) {
 		if (match_pattern(type, sc->timeouts[i].type_pattern))
 			return sc->timeouts[i].timeout_secs;
 	}
 
 	return 0;
 }
 
 /*
  * Sets "extended type" of a channel; used by session layer to add additional
  * information about channel types (e.g. shell, login, subsystem) that can then
  * be used to select timeouts.
  * Will reset c->inactive_deadline as a side-effect.
  */
 void
 channel_set_xtype(struct ssh *ssh, int id, const char *xctype)
 {
 	Channel *c;
 
 	if ((c = channel_by_id(ssh, id)) == NULL)
 		fatal_f("missing channel %d", id);
 	if (c->xctype != NULL)
 		free(c->xctype);
 	c->xctype = xstrdup(xctype);
 	/* Type has changed, so look up inactivity deadline again */
 	c->inactive_deadline = lookup_timeout(ssh, c->xctype);
 	debug2_f("labeled channel %d as %s (inactive timeout %u)", id, xctype,
 	    c->inactive_deadline);
 }
 
+/*
+ * update "last used" time on a channel.
+ * NB. nothing else should update lastused except to clear it.
+ */
+static void
+channel_set_used_time(struct ssh *ssh, Channel *c)
+{
+	ssh->chanctxt->lastused = monotime();
+	if (c != NULL)
+		c->lastused = ssh->chanctxt->lastused;
+}
+
+/*
+ * Get the time at which a channel is due to time out for inactivity.
+ * Returns 0 if the channel is not due to time out ever.
+ */
+static time_t
+channel_get_expiry(struct ssh *ssh, Channel *c)
+{
+	struct ssh_channels *sc = ssh->chanctxt;
+	time_t expiry = 0, channel_expiry;
+
+	if (sc->lastused != 0 && sc->global_deadline != 0)
+		expiry = sc->lastused + sc->global_deadline;
+	if (c->lastused != 0 && c->inactive_deadline != 0) {
+		channel_expiry = c->lastused + c->inactive_deadline;
+		if (expiry == 0 || channel_expiry < expiry)
+			expiry = channel_expiry;
+	}
+	return expiry;
+}
+
 /*
  * Register filedescriptors for a channel, used when allocating a channel or
  * when the channel consumer/producer is ready, e.g. shell exec'd
  */
 static void
 channel_register_fds(struct ssh *ssh, Channel *c, int rfd, int wfd, int efd,
     int extusage, int nonblock, int is_tty)
 {
 	int val;
 
 	if (rfd != -1)
 		(void)fcntl(rfd, F_SETFD, FD_CLOEXEC);
 	if (wfd != -1 && wfd != rfd)
 		(void)fcntl(wfd, F_SETFD, FD_CLOEXEC);
 	if (efd != -1 && efd != rfd && efd != wfd)
 		(void)fcntl(efd, F_SETFD, FD_CLOEXEC);
 
 	c->rfd = rfd;
 	c->wfd = wfd;
 	c->sock = (rfd == wfd) ? rfd : -1;
 	c->efd = efd;
 	c->extended_usage = extusage;
 
 	if ((c->isatty = is_tty) != 0)
 		debug2("channel %d: rfd %d isatty", c->self, c->rfd);
 #ifdef _AIX
 	/* XXX: Later AIX versions can't push as much data to tty */
 	c->wfd_isatty = is_tty || isatty(c->wfd);
 #endif
 
 	/* enable nonblocking mode */
 	c->restore_block = 0;
 	if (nonblock == CHANNEL_NONBLOCK_STDIO) {
 		/*
 		 * Special handling for stdio file descriptors: do not set
 		 * non-blocking mode if they are TTYs. Otherwise prepare to
 		 * restore their blocking state on exit to avoid interfering
 		 * with other programs that follow.
 		 */
 		if (rfd != -1 && !isatty(rfd) &&
 		    (val = fcntl(rfd, F_GETFL)) != -1 && !(val & O_NONBLOCK)) {
 			c->restore_flags[0] = val;
 			c->restore_block |= CHANNEL_RESTORE_RFD;
 			set_nonblock(rfd);
 		}
 		if (wfd != -1 && !isatty(wfd) &&
 		    (val = fcntl(wfd, F_GETFL)) != -1 && !(val & O_NONBLOCK)) {
 			c->restore_flags[1] = val;
 			c->restore_block |= CHANNEL_RESTORE_WFD;
 			set_nonblock(wfd);
 		}
 		if (efd != -1 && !isatty(efd) &&
 		    (val = fcntl(efd, F_GETFL)) != -1 && !(val & O_NONBLOCK)) {
 			c->restore_flags[2] = val;
 			c->restore_block |= CHANNEL_RESTORE_EFD;
 			set_nonblock(efd);
 		}
 	} else if (nonblock) {
 		if (rfd != -1)
 			set_nonblock(rfd);
 		if (wfd != -1)
 			set_nonblock(wfd);
 		if (efd != -1)
 			set_nonblock(efd);
 	}
+	/* channel might be entering a larval state, so reset global timeout */
+	channel_set_used_time(ssh, NULL);
 }
 
 /*
  * Allocate a new channel object and set its type and socket.
  */
 Channel *
 channel_new(struct ssh *ssh, char *ctype, int type, int rfd, int wfd, int efd,
     u_int window, u_int maxpack, int extusage, const char *remote_name,
     int nonblock)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	u_int i, found = 0;
 	Channel *c;
 	int r;
 
 	/* Try to find a free slot where to put the new channel. */
 	for (i = 0; i < sc->channels_alloc; i++) {
 		if (sc->channels[i] == NULL) {
 			/* Found a free slot. */
 			found = i;
 			break;
 		}
 	}
 	if (i >= sc->channels_alloc) {
 		/*
 		 * There are no free slots. Take last+1 slot and expand
 		 * the array.
 		 */
 		found = sc->channels_alloc;
 		if (sc->channels_alloc > CHANNELS_MAX_CHANNELS)
 			fatal_f("internal error: channels_alloc %d too big",
 			    sc->channels_alloc);
 		sc->channels = xrecallocarray(sc->channels, sc->channels_alloc,
 		    sc->channels_alloc + 10, sizeof(*sc->channels));
 		sc->channels_alloc += 10;
 		debug2("channel: expanding %d", sc->channels_alloc);
 	}
 	/* Initialize and return new channel. */
 	c = sc->channels[found] = xcalloc(1, sizeof(Channel));
 	if ((c->input = sshbuf_new()) == NULL ||
 	    (c->output = sshbuf_new()) == NULL ||
 	    (c->extended = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_set_max_size(c->input, CHAN_INPUT_MAX)) != 0)
 		fatal_fr(r, "sshbuf_set_max_size");
 	c->ostate = CHAN_OUTPUT_OPEN;
 	c->istate = CHAN_INPUT_OPEN;
 	channel_register_fds(ssh, c, rfd, wfd, efd, extusage, nonblock, 0);
 	c->self = found;
 	c->type = type;
 	c->ctype = ctype;
 	c->local_window = window;
 	c->local_window_max = window;
 	c->local_maxpacket = maxpack;
 	c->remote_name = xstrdup(remote_name);
 	c->ctl_chan = -1;
 	c->delayed = 1;		/* prevent call to channel_post handler */
 	c->inactive_deadline = lookup_timeout(ssh, c->ctype);
 	TAILQ_INIT(&c->status_confirms);
 	debug("channel %d: new %s [%s] (inactive timeout: %u)",
 	    found, c->ctype, remote_name, c->inactive_deadline);
 	return c;
 }
 
 int
 channel_close_fd(struct ssh *ssh, Channel *c, int *fdp)
 {
 	int ret, fd = *fdp;
 
 	if (fd == -1)
 		return 0;
 
 	/* restore blocking */
 	if (*fdp == c->rfd &&
 	    (c->restore_block & CHANNEL_RESTORE_RFD) != 0)
 		(void)fcntl(*fdp, F_SETFL, c->restore_flags[0]);
 	else if (*fdp == c->wfd &&
 	    (c->restore_block & CHANNEL_RESTORE_WFD) != 0)
 		(void)fcntl(*fdp, F_SETFL, c->restore_flags[1]);
 	else if (*fdp == c->efd &&
 	    (c->restore_block & CHANNEL_RESTORE_EFD) != 0)
 		(void)fcntl(*fdp, F_SETFL, c->restore_flags[2]);
 
 	if (*fdp == c->rfd) {
 		c->io_want &= ~SSH_CHAN_IO_RFD;
 		c->io_ready &= ~SSH_CHAN_IO_RFD;
 		c->rfd = -1;
 		c->pfds[0] = -1;
 	}
 	if (*fdp == c->wfd) {
 		c->io_want &= ~SSH_CHAN_IO_WFD;
 		c->io_ready &= ~SSH_CHAN_IO_WFD;
 		c->wfd = -1;
 		c->pfds[1] = -1;
 	}
 	if (*fdp == c->efd) {
 		c->io_want &= ~SSH_CHAN_IO_EFD;
 		c->io_ready &= ~SSH_CHAN_IO_EFD;
 		c->efd = -1;
 		c->pfds[2] = -1;
 	}
 	if (*fdp == c->sock) {
 		c->io_want &= ~SSH_CHAN_IO_SOCK;
 		c->io_ready &= ~SSH_CHAN_IO_SOCK;
 		c->sock = -1;
 		c->pfds[3] = -1;
 	}
 
 	ret = close(fd);
 	*fdp = -1; /* probably redundant */
 	return ret;
 }
 
 /* Close all channel fd/socket. */
 static void
 channel_close_fds(struct ssh *ssh, Channel *c)
 {
 	int sock = c->sock, rfd = c->rfd, wfd = c->wfd, efd = c->efd;
 
 	channel_close_fd(ssh, c, &c->sock);
 	if (rfd != sock)
 		channel_close_fd(ssh, c, &c->rfd);
 	if (wfd != sock && wfd != rfd)
 		channel_close_fd(ssh, c, &c->wfd);
 	if (efd != sock && efd != rfd && efd != wfd)
 		channel_close_fd(ssh, c, &c->efd);
 }
 
 static void
 fwd_perm_clear(struct permission *perm)
 {
 	free(perm->host_to_connect);
 	free(perm->listen_host);
 	free(perm->listen_path);
 	memset(perm, 0, sizeof(*perm));
 }
 
 /* Returns an printable name for the specified forwarding permission list */
 static const char *
 fwd_ident(int who, int where)
 {
 	if (who == FORWARD_ADM) {
 		if (where == FORWARD_LOCAL)
 			return "admin local";
 		else if (where == FORWARD_REMOTE)
 			return "admin remote";
 	} else if (who == FORWARD_USER) {
 		if (where == FORWARD_LOCAL)
 			return "user local";
 		else if (where == FORWARD_REMOTE)
 			return "user remote";
 	}
 	fatal("Unknown forward permission list %d/%d", who, where);
 }
 
 /* Returns the forwarding permission list for the specified direction */
 static struct permission_set *
 permission_set_get(struct ssh *ssh, int where)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 
 	switch (where) {
 	case FORWARD_LOCAL:
 		return &sc->local_perms;
 		break;
 	case FORWARD_REMOTE:
 		return &sc->remote_perms;
 		break;
 	default:
 		fatal_f("invalid forwarding direction %d", where);
 	}
 }
 
 /* Returns pointers to the specified forwarding list and its element count */
 static void
 permission_set_get_array(struct ssh *ssh, int who, int where,
     struct permission ***permpp, u_int **npermpp)
 {
 	struct permission_set *pset = permission_set_get(ssh, where);
 
 	switch (who) {
 	case FORWARD_USER:
 		*permpp = &pset->permitted_user;
 		*npermpp = &pset->num_permitted_user;
 		break;
 	case FORWARD_ADM:
 		*permpp = &pset->permitted_admin;
 		*npermpp = &pset->num_permitted_admin;
 		break;
 	default:
 		fatal_f("invalid forwarding client %d", who);
 	}
 }
 
 /* Adds an entry to the specified forwarding list */
 static int
 permission_set_add(struct ssh *ssh, int who, int where,
     const char *host_to_connect, int port_to_connect,
     const char *listen_host, const char *listen_path, int listen_port,
     Channel *downstream)
 {
 	struct permission **permp;
 	u_int n, *npermp;
 
 	permission_set_get_array(ssh, who, where, &permp, &npermp);
 
 	if (*npermp >= INT_MAX)
 		fatal_f("%s overflow", fwd_ident(who, where));
 
 	*permp = xrecallocarray(*permp, *npermp, *npermp + 1, sizeof(**permp));
 	n = (*npermp)++;
 #define MAYBE_DUP(s) ((s == NULL) ? NULL : xstrdup(s))
 	(*permp)[n].host_to_connect = MAYBE_DUP(host_to_connect);
 	(*permp)[n].port_to_connect = port_to_connect;
 	(*permp)[n].listen_host = MAYBE_DUP(listen_host);
 	(*permp)[n].listen_path = MAYBE_DUP(listen_path);
 	(*permp)[n].listen_port = listen_port;
 	(*permp)[n].downstream = downstream;
 #undef MAYBE_DUP
 	return (int)n;
 }
 
 static void
 mux_remove_remote_forwardings(struct ssh *ssh, Channel *c)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	struct permission *perm;
 	int r;
 	u_int i;
 
 	for (i = 0; i < pset->num_permitted_user; i++) {
 		perm = &pset->permitted_user[i];
 		if (perm->downstream != c)
 			continue;
 
 		/* cancel on the server, since mux client is gone */
 		debug("channel %d: cleanup remote forward for %s:%u",
 		    c->self, perm->listen_host, perm->listen_port);
 		if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh,
 		    "cancel-tcpip-forward")) != 0 ||
 		    (r = sshpkt_put_u8(ssh, 0)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh,
 		    channel_rfwd_bind_host(perm->listen_host))) != 0 ||
 		    (r = sshpkt_put_u32(ssh, perm->listen_port)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0) {
 			fatal_fr(r, "channel %i", c->self);
 		}
 		fwd_perm_clear(perm); /* unregister */
 	}
 }
 
 /* Free the channel and close its fd/socket. */
 void
 channel_free(struct ssh *ssh, Channel *c)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	char *s;
 	u_int i, n;
 	Channel *other;
 	struct channel_confirm *cc;
 
 	for (n = 0, i = 0; i < sc->channels_alloc; i++) {
 		if ((other = sc->channels[i]) == NULL)
 			continue;
 		n++;
 		/* detach from mux client and prepare for closing */
 		if (c->type == SSH_CHANNEL_MUX_CLIENT &&
 		    other->type == SSH_CHANNEL_MUX_PROXY &&
 		    other->mux_ctx == c) {
 			other->mux_ctx = NULL;
 			other->type = SSH_CHANNEL_OPEN;
 			other->istate = CHAN_INPUT_CLOSED;
 			other->ostate = CHAN_OUTPUT_CLOSED;
 		}
 	}
 	debug("channel %d: free: %s, nchannels %u", c->self,
 	    c->remote_name ? c->remote_name : "???", n);
 
 	if (c->type == SSH_CHANNEL_MUX_CLIENT) {
 		mux_remove_remote_forwardings(ssh, c);
 		free(c->mux_ctx);
 		c->mux_ctx = NULL;
 	} else if (c->type == SSH_CHANNEL_MUX_LISTENER) {
 		free(c->mux_ctx);
 		c->mux_ctx = NULL;
 	}
 
 	if (log_level_get() >= SYSLOG_LEVEL_DEBUG3) {
 		s = channel_open_message(ssh);
 		debug3("channel %d: status: %s", c->self, s);
 		free(s);
 	}
 
 	channel_close_fds(ssh, c);
 	sshbuf_free(c->input);
 	sshbuf_free(c->output);
 	sshbuf_free(c->extended);
 	c->input = c->output = c->extended = NULL;
 	free(c->remote_name);
 	c->remote_name = NULL;
 	free(c->path);
 	c->path = NULL;
 	free(c->listening_addr);
 	c->listening_addr = NULL;
 	free(c->xctype);
 	c->xctype = NULL;
 	while ((cc = TAILQ_FIRST(&c->status_confirms)) != NULL) {
 		if (cc->abandon_cb != NULL)
 			cc->abandon_cb(ssh, c, cc->ctx);
 		TAILQ_REMOVE(&c->status_confirms, cc, entry);
 		freezero(cc, sizeof(*cc));
 	}
 	if (c->filter_cleanup != NULL && c->filter_ctx != NULL)
 		c->filter_cleanup(ssh, c->self, c->filter_ctx);
 	sc->channels[c->self] = NULL;
 	freezero(c, sizeof(*c));
 }
 
 void
 channel_free_all(struct ssh *ssh)
 {
 	u_int i;
 	struct ssh_channels *sc = ssh->chanctxt;
 
 	for (i = 0; i < sc->channels_alloc; i++)
 		if (sc->channels[i] != NULL)
 			channel_free(ssh, sc->channels[i]);
 
 	free(sc->channels);
 	sc->channels = NULL;
 	sc->channels_alloc = 0;
 
 	free(sc->x11_saved_display);
 	sc->x11_saved_display = NULL;
 
 	free(sc->x11_saved_proto);
 	sc->x11_saved_proto = NULL;
 
 	free(sc->x11_saved_data);
 	sc->x11_saved_data = NULL;
 	sc->x11_saved_data_len = 0;
 
 	free(sc->x11_fake_data);
 	sc->x11_fake_data = NULL;
 	sc->x11_fake_data_len = 0;
 }
 
 /*
  * Closes the sockets/fds of all channels.  This is used to close extra file
  * descriptors after a fork.
  */
 void
 channel_close_all(struct ssh *ssh)
 {
 	u_int i;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++)
 		if (ssh->chanctxt->channels[i] != NULL)
 			channel_close_fds(ssh, ssh->chanctxt->channels[i]);
 }
 
 /*
  * Stop listening to channels.
  */
 void
 channel_stop_listening(struct ssh *ssh)
 {
 	u_int i;
 	Channel *c;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c != NULL) {
 			switch (c->type) {
 			case SSH_CHANNEL_AUTH_SOCKET:
 			case SSH_CHANNEL_PORT_LISTENER:
 			case SSH_CHANNEL_RPORT_LISTENER:
 			case SSH_CHANNEL_X11_LISTENER:
 			case SSH_CHANNEL_UNIX_LISTENER:
 			case SSH_CHANNEL_RUNIX_LISTENER:
 				channel_close_fd(ssh, c, &c->sock);
 				channel_free(ssh, c);
 				break;
 			}
 		}
 	}
 }
 
 /*
  * Returns true if no channel has too much buffered data, and false if one or
  * more channel is overfull.
  */
 int
 channel_not_very_much_buffered_data(struct ssh *ssh)
 {
 	u_int i;
 	u_int maxsize = ssh_packet_get_maxsize(ssh);
 	Channel *c;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_OPEN)
 			continue;
 		if (sshbuf_len(c->output) > maxsize) {
 			debug2("channel %d: big output buffer %zu > %u",
 			    c->self, sshbuf_len(c->output), maxsize);
 			return 0;
 		}
 	}
 	return 1;
 }
 
 /* Returns true if any channel is still open. */
 int
 channel_still_open(struct ssh *ssh)
 {
 	u_int i;
 	Channel *c;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c == NULL)
 			continue;
 		switch (c->type) {
 		case SSH_CHANNEL_X11_LISTENER:
 		case SSH_CHANNEL_PORT_LISTENER:
 		case SSH_CHANNEL_RPORT_LISTENER:
 		case SSH_CHANNEL_MUX_LISTENER:
 		case SSH_CHANNEL_CLOSED:
 		case SSH_CHANNEL_AUTH_SOCKET:
 		case SSH_CHANNEL_DYNAMIC:
 		case SSH_CHANNEL_RDYNAMIC_OPEN:
 		case SSH_CHANNEL_CONNECTING:
 		case SSH_CHANNEL_ZOMBIE:
 		case SSH_CHANNEL_ABANDONED:
 		case SSH_CHANNEL_UNIX_LISTENER:
 		case SSH_CHANNEL_RUNIX_LISTENER:
 			continue;
 		case SSH_CHANNEL_LARVAL:
 			continue;
 		case SSH_CHANNEL_OPENING:
 		case SSH_CHANNEL_OPEN:
 		case SSH_CHANNEL_RDYNAMIC_FINISH:
 		case SSH_CHANNEL_X11_OPEN:
 		case SSH_CHANNEL_MUX_CLIENT:
 		case SSH_CHANNEL_MUX_PROXY:
 			return 1;
 		default:
 			fatal_f("bad channel type %d", c->type);
 			/* NOTREACHED */
 		}
 	}
 	return 0;
 }
 
 /* Returns true if a channel with a TTY is open. */
 int
 channel_tty_open(struct ssh *ssh)
 {
 	u_int i;
 	Channel *c;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_OPEN)
 			continue;
 		if (c->client_tty)
 			return 1;
 	}
 	return 0;
 }
 
 /* Returns the id of an open channel suitable for keepaliving */
 int
 channel_find_open(struct ssh *ssh)
 {
 	u_int i;
 	Channel *c;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c == NULL || !c->have_remote_id)
 			continue;
 		switch (c->type) {
 		case SSH_CHANNEL_CLOSED:
 		case SSH_CHANNEL_DYNAMIC:
 		case SSH_CHANNEL_RDYNAMIC_OPEN:
 		case SSH_CHANNEL_RDYNAMIC_FINISH:
 		case SSH_CHANNEL_X11_LISTENER:
 		case SSH_CHANNEL_PORT_LISTENER:
 		case SSH_CHANNEL_RPORT_LISTENER:
 		case SSH_CHANNEL_MUX_LISTENER:
 		case SSH_CHANNEL_MUX_CLIENT:
 		case SSH_CHANNEL_MUX_PROXY:
 		case SSH_CHANNEL_OPENING:
 		case SSH_CHANNEL_CONNECTING:
 		case SSH_CHANNEL_ZOMBIE:
 		case SSH_CHANNEL_ABANDONED:
 		case SSH_CHANNEL_UNIX_LISTENER:
 		case SSH_CHANNEL_RUNIX_LISTENER:
 			continue;
 		case SSH_CHANNEL_LARVAL:
 		case SSH_CHANNEL_AUTH_SOCKET:
 		case SSH_CHANNEL_OPEN:
 		case SSH_CHANNEL_X11_OPEN:
 			return i;
 		default:
 			fatal_f("bad channel type %d", c->type);
 			/* NOTREACHED */
 		}
 	}
 	return -1;
 }
 
 /* Returns the state of the channel's extended usage flag */
 const char *
 channel_format_extended_usage(const Channel *c)
 {
 	if (c->efd == -1)
 		return "closed";
 
 	switch (c->extended_usage) {
 	case CHAN_EXTENDED_WRITE:
 		return "write";
 	case CHAN_EXTENDED_READ:
 		return "read";
 	case CHAN_EXTENDED_IGNORE:
 		return "ignore";
 	default:
 		return "UNKNOWN";
 	}
 }
 
 static char *
 channel_format_status(const Channel *c)
 {
 	char *ret = NULL;
 
 	xasprintf(&ret, "t%d [%s] %s%u i%u/%zu o%u/%zu e[%s]/%zu "
 	    "fd %d/%d/%d sock %d cc %d io 0x%02x/0x%02x",
 	    c->type, c->xctype != NULL ? c->xctype : c->ctype,
 	    c->have_remote_id ? "r" : "nr", c->remote_id,
 	    c->istate, sshbuf_len(c->input),
 	    c->ostate, sshbuf_len(c->output),
 	    channel_format_extended_usage(c), sshbuf_len(c->extended),
 	    c->rfd, c->wfd, c->efd, c->sock, c->ctl_chan,
 	    c->io_want, c->io_ready);
 	return ret;
 }
 
 /*
  * Returns a message describing the currently open forwarded connections,
  * suitable for sending to the client.  The message contains crlf pairs for
  * newlines.
  */
 char *
 channel_open_message(struct ssh *ssh)
 {
 	struct sshbuf *buf;
 	Channel *c;
 	u_int i;
 	int r;
 	char *cp, *ret;
 
 	if ((buf = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new");
 	if ((r = sshbuf_putf(buf,
 	    "The following connections are open:\r\n")) != 0)
 		fatal_fr(r, "sshbuf_putf");
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		c = ssh->chanctxt->channels[i];
 		if (c == NULL)
 			continue;
 		switch (c->type) {
 		case SSH_CHANNEL_X11_LISTENER:
 		case SSH_CHANNEL_PORT_LISTENER:
 		case SSH_CHANNEL_RPORT_LISTENER:
 		case SSH_CHANNEL_CLOSED:
 		case SSH_CHANNEL_AUTH_SOCKET:
 		case SSH_CHANNEL_ZOMBIE:
 		case SSH_CHANNEL_ABANDONED:
 		case SSH_CHANNEL_MUX_LISTENER:
 		case SSH_CHANNEL_UNIX_LISTENER:
 		case SSH_CHANNEL_RUNIX_LISTENER:
 			continue;
 		case SSH_CHANNEL_LARVAL:
 		case SSH_CHANNEL_OPENING:
 		case SSH_CHANNEL_CONNECTING:
 		case SSH_CHANNEL_DYNAMIC:
 		case SSH_CHANNEL_RDYNAMIC_OPEN:
 		case SSH_CHANNEL_RDYNAMIC_FINISH:
 		case SSH_CHANNEL_OPEN:
 		case SSH_CHANNEL_X11_OPEN:
 		case SSH_CHANNEL_MUX_PROXY:
 		case SSH_CHANNEL_MUX_CLIENT:
 			cp = channel_format_status(c);
 			if ((r = sshbuf_putf(buf, "  #%d %.300s (%s)\r\n",
 			    c->self, c->remote_name, cp)) != 0) {
 				free(cp);
 				fatal_fr(r, "sshbuf_putf");
 			}
 			free(cp);
 			continue;
 		default:
 			fatal_f("bad channel type %d", c->type);
 			/* NOTREACHED */
 		}
 	}
 	if ((ret = sshbuf_dup_string(buf)) == NULL)
 		fatal_f("sshbuf_dup_string");
 	sshbuf_free(buf);
 	return ret;
 }
 
 static void
 open_preamble(struct ssh *ssh, const char *where, Channel *c, const char *type)
 {
 	int r;
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_OPEN)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, type)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->self)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_window)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_maxpacket)) != 0) {
 		fatal_r(r, "%s: channel %i: open", where, c->self);
 	}
 }
 
 void
 channel_send_open(struct ssh *ssh, int id)
 {
 	Channel *c = channel_lookup(ssh, id);
 	int r;
 
 	if (c == NULL) {
 		logit("channel_send_open: %d: bad id", id);
 		return;
 	}
 	debug2("channel %d: send open", id);
 	open_preamble(ssh, __func__, c, c->ctype);
 	if ((r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i", c->self);
 }
 
 void
 channel_request_start(struct ssh *ssh, int id, char *service, int wantconfirm)
 {
 	Channel *c = channel_lookup(ssh, id);
 	int r;
 
 	if (c == NULL) {
 		logit_f("%d: unknown channel id", id);
 		return;
 	}
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote id", c->self);
 
 	debug2("channel %d: request %s confirm %d", id, service, wantconfirm);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, service)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, wantconfirm)) != 0) {
 		fatal_fr(r, "channel %i", c->self);
 	}
 }
 
 void
 channel_register_status_confirm(struct ssh *ssh, int id,
     channel_confirm_cb *cb, channel_confirm_abandon_cb *abandon_cb, void *ctx)
 {
 	struct channel_confirm *cc;
 	Channel *c;
 
 	if ((c = channel_lookup(ssh, id)) == NULL)
 		fatal_f("%d: bad id", id);
 
 	cc = xcalloc(1, sizeof(*cc));
 	cc->cb = cb;
 	cc->abandon_cb = abandon_cb;
 	cc->ctx = ctx;
 	TAILQ_INSERT_TAIL(&c->status_confirms, cc, entry);
 }
 
 void
 channel_register_open_confirm(struct ssh *ssh, int id,
     channel_open_fn *fn, void *ctx)
 {
 	Channel *c = channel_lookup(ssh, id);
 
 	if (c == NULL) {
 		logit_f("%d: bad id", id);
 		return;
 	}
 	c->open_confirm = fn;
 	c->open_confirm_ctx = ctx;
 }
 
 void
 channel_register_cleanup(struct ssh *ssh, int id,
     channel_callback_fn *fn, int do_close)
 {
 	Channel *c = channel_by_id(ssh, id);
 
 	if (c == NULL) {
 		logit_f("%d: bad id", id);
 		return;
 	}
 	c->detach_user = fn;
 	c->detach_close = do_close;
 }
 
 void
 channel_cancel_cleanup(struct ssh *ssh, int id)
 {
 	Channel *c = channel_by_id(ssh, id);
 
 	if (c == NULL) {
 		logit_f("%d: bad id", id);
 		return;
 	}
 	c->detach_user = NULL;
 	c->detach_close = 0;
 }
 
 void
 channel_register_filter(struct ssh *ssh, int id, channel_infilter_fn *ifn,
     channel_outfilter_fn *ofn, channel_filter_cleanup_fn *cfn, void *ctx)
 {
 	Channel *c = channel_lookup(ssh, id);
 
 	if (c == NULL) {
 		logit_f("%d: bad id", id);
 		return;
 	}
 	c->input_filter = ifn;
 	c->output_filter = ofn;
 	c->filter_ctx = ctx;
 	c->filter_cleanup = cfn;
 }
 
 void
 channel_set_fds(struct ssh *ssh, int id, int rfd, int wfd, int efd,
     int extusage, int nonblock, int is_tty, u_int window_max)
 {
 	Channel *c = channel_lookup(ssh, id);
 	int r;
 
 	if (c == NULL || c->type != SSH_CHANNEL_LARVAL)
 		fatal("channel_activate for non-larval channel %d.", id);
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote id", c->self);
 
 	channel_register_fds(ssh, c, rfd, wfd, efd, extusage, nonblock, is_tty);
 	c->type = SSH_CHANNEL_OPEN;
-	c->lastused = monotime();
+	channel_set_used_time(ssh, c);
 	c->local_window = c->local_window_max = window_max;
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_WINDOW_ADJUST)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_window)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i", c->self);
 }
 
 static void
 channel_pre_listener(struct ssh *ssh, Channel *c)
 {
 	c->io_want = SSH_CHAN_IO_SOCK_R;
 }
 
 static void
 channel_pre_connecting(struct ssh *ssh, Channel *c)
 {
 	debug3("channel %d: waiting for connection", c->self);
 	c->io_want = SSH_CHAN_IO_SOCK_W;
 }
 
 static void
 channel_pre_open(struct ssh *ssh, Channel *c)
 {
 	c->io_want = 0;
 	if (c->istate == CHAN_INPUT_OPEN &&
 	    c->remote_window > 0 &&
 	    sshbuf_len(c->input) < c->remote_window &&
 	    sshbuf_check_reserve(c->input, CHAN_RBUF) == 0)
 		c->io_want |= SSH_CHAN_IO_RFD;
 	if (c->ostate == CHAN_OUTPUT_OPEN ||
 	    c->ostate == CHAN_OUTPUT_WAIT_DRAIN) {
 		if (sshbuf_len(c->output) > 0) {
 			c->io_want |= SSH_CHAN_IO_WFD;
 		} else if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN) {
 			if (CHANNEL_EFD_OUTPUT_ACTIVE(c))
 				debug2("channel %d: "
 				    "obuf_empty delayed efd %d/(%zu)", c->self,
 				    c->efd, sshbuf_len(c->extended));
 			else
 				chan_obuf_empty(ssh, c);
 		}
 	}
 	/** XXX check close conditions, too */
 	if (c->efd != -1 && !(c->istate == CHAN_INPUT_CLOSED &&
 	    c->ostate == CHAN_OUTPUT_CLOSED)) {
 		if (c->extended_usage == CHAN_EXTENDED_WRITE &&
 		    sshbuf_len(c->extended) > 0)
 			c->io_want |= SSH_CHAN_IO_EFD_W;
 		else if (c->efd != -1 && !(c->flags & CHAN_EOF_SENT) &&
 		    (c->extended_usage == CHAN_EXTENDED_READ ||
 		    c->extended_usage == CHAN_EXTENDED_IGNORE) &&
 		    sshbuf_len(c->extended) < c->remote_window)
 			c->io_want |= SSH_CHAN_IO_EFD_R;
 	}
 	/* XXX: What about efd? races? */
 }
 
 /*
  * This is a special state for X11 authentication spoofing.  An opened X11
  * connection (when authentication spoofing is being done) remains in this
  * state until the first packet has been completely read.  The authentication
  * data in that packet is then substituted by the real data if it matches the
  * fake data, and the channel is put into normal mode.
  * XXX All this happens at the client side.
  * Returns: 0 = need more data, -1 = wrong cookie, 1 = ok
  */
 static int
 x11_open_helper(struct ssh *ssh, struct sshbuf *b)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	u_char *ucp;
 	u_int proto_len, data_len;
 
 	/* Is this being called after the refusal deadline? */
 	if (sc->x11_refuse_time != 0 &&
 	    monotime() >= sc->x11_refuse_time) {
 		verbose("Rejected X11 connection after ForwardX11Timeout "
 		    "expired");
 		return -1;
 	}
 
 	/* Check if the fixed size part of the packet is in buffer. */
 	if (sshbuf_len(b) < 12)
 		return 0;
 
 	/* Parse the lengths of variable-length fields. */
 	ucp = sshbuf_mutable_ptr(b);
 	if (ucp[0] == 0x42) {	/* Byte order MSB first. */
 		proto_len = 256 * ucp[6] + ucp[7];
 		data_len = 256 * ucp[8] + ucp[9];
 	} else if (ucp[0] == 0x6c) {	/* Byte order LSB first. */
 		proto_len = ucp[6] + 256 * ucp[7];
 		data_len = ucp[8] + 256 * ucp[9];
 	} else {
 		debug2("Initial X11 packet contains bad byte order byte: 0x%x",
 		    ucp[0]);
 		return -1;
 	}
 
 	/* Check if the whole packet is in buffer. */
 	if (sshbuf_len(b) <
 	    12 + ((proto_len + 3) & ~3) + ((data_len + 3) & ~3))
 		return 0;
 
 	/* Check if authentication protocol matches. */
 	if (proto_len != strlen(sc->x11_saved_proto) ||
 	    memcmp(ucp + 12, sc->x11_saved_proto, proto_len) != 0) {
 		debug2("X11 connection uses different authentication protocol.");
 		return -1;
 	}
 	/* Check if authentication data matches our fake data. */
 	if (data_len != sc->x11_fake_data_len ||
 	    timingsafe_bcmp(ucp + 12 + ((proto_len + 3) & ~3),
 		sc->x11_fake_data, sc->x11_fake_data_len) != 0) {
 		debug2("X11 auth data does not match fake data.");
 		return -1;
 	}
 	/* Check fake data length */
 	if (sc->x11_fake_data_len != sc->x11_saved_data_len) {
 		error("X11 fake_data_len %d != saved_data_len %d",
 		    sc->x11_fake_data_len, sc->x11_saved_data_len);
 		return -1;
 	}
 	/*
 	 * Received authentication protocol and data match
 	 * our fake data. Substitute the fake data with real
 	 * data.
 	 */
 	memcpy(ucp + 12 + ((proto_len + 3) & ~3),
 	    sc->x11_saved_data, sc->x11_saved_data_len);
 	return 1;
 }
 
 void
 channel_force_close(struct ssh *ssh, Channel *c, int abandon)
 {
 	debug3_f("channel %d: forcibly closing", c->self);
 	if (c->istate == CHAN_INPUT_OPEN)
 		chan_read_failed(ssh, c);
 	if (c->istate == CHAN_INPUT_WAIT_DRAIN) {
 		sshbuf_reset(c->input);
 		chan_ibuf_empty(ssh, c);
 	}
 	if (c->ostate == CHAN_OUTPUT_OPEN ||
 	    c->ostate == CHAN_OUTPUT_WAIT_DRAIN) {
 		sshbuf_reset(c->output);
 		chan_write_failed(ssh, c);
 	}
 	if (c->detach_user)
 		c->detach_user(ssh, c->self, 1, NULL);
 	if (c->efd != -1)
 		channel_close_fd(ssh, c, &c->efd);
 	if (abandon)
 		c->type = SSH_CHANNEL_ABANDONED;
 	/* exempt from inactivity timeouts */
 	c->inactive_deadline = 0;
 	c->lastused = 0;
 }
 
 static void
 channel_pre_x11_open(struct ssh *ssh, Channel *c)
 {
 	int ret = x11_open_helper(ssh, c->output);
 
 	/* c->force_drain = 1; */
 
 	if (ret == 1) {
 		c->type = SSH_CHANNEL_OPEN;
-		c->lastused = monotime();
+		channel_set_used_time(ssh, c);
 		channel_pre_open(ssh, c);
 	} else if (ret == -1) {
 		logit("X11 connection rejected because of wrong "
 		    "authentication.");
 		debug2("X11 rejected %d i%d/o%d",
 		    c->self, c->istate, c->ostate);
 		channel_force_close(ssh, c, 0);
 	}
 }
 
 static void
 channel_pre_mux_client(struct ssh *ssh, Channel *c)
 {
 	c->io_want = 0;
 	if (c->istate == CHAN_INPUT_OPEN && !c->mux_pause &&
 	    sshbuf_check_reserve(c->input, CHAN_RBUF) == 0)
 		c->io_want |= SSH_CHAN_IO_RFD;
 	if (c->istate == CHAN_INPUT_WAIT_DRAIN) {
 		/* clear buffer immediately (discard any partial packet) */
 		sshbuf_reset(c->input);
 		chan_ibuf_empty(ssh, c);
 		/* Start output drain. XXX just kill chan? */
 		chan_rcvd_oclose(ssh, c);
 	}
 	if (c->ostate == CHAN_OUTPUT_OPEN ||
 	    c->ostate == CHAN_OUTPUT_WAIT_DRAIN) {
 		if (sshbuf_len(c->output) > 0)
 			c->io_want |= SSH_CHAN_IO_WFD;
 		else if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN)
 			chan_obuf_empty(ssh, c);
 	}
 }
 
 /* try to decode a socks4 header */
 static int
 channel_decode_socks4(Channel *c, struct sshbuf *input, struct sshbuf *output)
 {
 	const u_char *p;
 	char *host;
 	u_int len, have, i, found, need;
 	char username[256];
 	struct {
 		u_int8_t version;
 		u_int8_t command;
 		u_int16_t dest_port;
 		struct in_addr dest_addr;
 	} s4_req, s4_rsp;
 	int r;
 
 	debug2("channel %d: decode socks4", c->self);
 
 	have = sshbuf_len(input);
 	len = sizeof(s4_req);
 	if (have < len)
 		return 0;
 	p = sshbuf_ptr(input);
 
 	need = 1;
 	/* SOCKS4A uses an invalid IP address 0.0.0.x */
 	if (p[4] == 0 && p[5] == 0 && p[6] == 0 && p[7] != 0) {
 		debug2("channel %d: socks4a request", c->self);
 		/* ... and needs an extra string (the hostname) */
 		need = 2;
 	}
 	/* Check for terminating NUL on the string(s) */
 	for (found = 0, i = len; i < have; i++) {
 		if (p[i] == '\0') {
 			found++;
 			if (found == need)
 				break;
 		}
 		if (i > 1024) {
 			/* the peer is probably sending garbage */
 			debug("channel %d: decode socks4: too long",
 			    c->self);
 			return -1;
 		}
 	}
 	if (found < need)
 		return 0;
 	if ((r = sshbuf_get(input, &s4_req.version, 1)) != 0 ||
 	    (r = sshbuf_get(input, &s4_req.command, 1)) != 0 ||
 	    (r = sshbuf_get(input, &s4_req.dest_port, 2)) != 0 ||
 	    (r = sshbuf_get(input, &s4_req.dest_addr, 4)) != 0) {
 		debug_r(r, "channels %d: decode socks4", c->self);
 		return -1;
 	}
 	have = sshbuf_len(input);
 	p = sshbuf_ptr(input);
 	if (memchr(p, '\0', have) == NULL) {
 		error("channel %d: decode socks4: unterminated user", c->self);
 		return -1;
 	}
 	len = strlen(p);
 	debug2("channel %d: decode socks4: user %s/%d", c->self, p, len);
 	len++; /* trailing '\0' */
 	strlcpy(username, p, sizeof(username));
 	if ((r = sshbuf_consume(input, len)) != 0)
 		fatal_fr(r, "channel %d: consume", c->self);
 	free(c->path);
 	c->path = NULL;
 	if (need == 1) {			/* SOCKS4: one string */
 		host = inet_ntoa(s4_req.dest_addr);
 		c->path = xstrdup(host);
 	} else {				/* SOCKS4A: two strings */
 		have = sshbuf_len(input);
 		p = sshbuf_ptr(input);
 		if (memchr(p, '\0', have) == NULL) {
 			error("channel %d: decode socks4a: host not nul "
 			    "terminated", c->self);
 			return -1;
 		}
 		len = strlen(p);
 		debug2("channel %d: decode socks4a: host %s/%d",
 		    c->self, p, len);
 		len++;				/* trailing '\0' */
 		if (len > NI_MAXHOST) {
 			error("channel %d: hostname \"%.100s\" too long",
 			    c->self, p);
 			return -1;
 		}
 		c->path = xstrdup(p);
 		if ((r = sshbuf_consume(input, len)) != 0)
 			fatal_fr(r, "channel %d: consume", c->self);
 	}
 	c->host_port = ntohs(s4_req.dest_port);
 
 	debug2("channel %d: dynamic request: socks4 host %s port %u command %u",
 	    c->self, c->path, c->host_port, s4_req.command);
 
 	if (s4_req.command != 1) {
 		debug("channel %d: cannot handle: %s cn %d",
 		    c->self, need == 1 ? "SOCKS4" : "SOCKS4A", s4_req.command);
 		return -1;
 	}
 	s4_rsp.version = 0;			/* vn: 0 for reply */
 	s4_rsp.command = 90;			/* cd: req granted */
 	s4_rsp.dest_port = 0;			/* ignored */
 	s4_rsp.dest_addr.s_addr = INADDR_ANY;	/* ignored */
 	if ((r = sshbuf_put(output, &s4_rsp, sizeof(s4_rsp))) != 0)
 		fatal_fr(r, "channel %d: append reply", c->self);
 	return 1;
 }
 
 /* try to decode a socks5 header */
 #define SSH_SOCKS5_AUTHDONE	0x1000
 #define SSH_SOCKS5_NOAUTH	0x00
 #define SSH_SOCKS5_IPV4		0x01
 #define SSH_SOCKS5_DOMAIN	0x03
 #define SSH_SOCKS5_IPV6		0x04
 #define SSH_SOCKS5_CONNECT	0x01
 #define SSH_SOCKS5_SUCCESS	0x00
 
 static int
 channel_decode_socks5(Channel *c, struct sshbuf *input, struct sshbuf *output)
 {
 	/* XXX use get/put_u8 instead of trusting struct padding */
 	struct {
 		u_int8_t version;
 		u_int8_t command;
 		u_int8_t reserved;
 		u_int8_t atyp;
 	} s5_req, s5_rsp;
 	u_int16_t dest_port;
 	char dest_addr[255+1], ntop[INET6_ADDRSTRLEN];
 	const u_char *p;
 	u_int have, need, i, found, nmethods, addrlen, af;
 	int r;
 
 	debug2("channel %d: decode socks5", c->self);
 	p = sshbuf_ptr(input);
 	if (p[0] != 0x05)
 		return -1;
 	have = sshbuf_len(input);
 	if (!(c->flags & SSH_SOCKS5_AUTHDONE)) {
 		/* format: ver | nmethods | methods */
 		if (have < 2)
 			return 0;
 		nmethods = p[1];
 		if (have < nmethods + 2)
 			return 0;
 		/* look for method: "NO AUTHENTICATION REQUIRED" */
 		for (found = 0, i = 2; i < nmethods + 2; i++) {
 			if (p[i] == SSH_SOCKS5_NOAUTH) {
 				found = 1;
 				break;
 			}
 		}
 		if (!found) {
 			debug("channel %d: method SSH_SOCKS5_NOAUTH not found",
 			    c->self);
 			return -1;
 		}
 		if ((r = sshbuf_consume(input, nmethods + 2)) != 0)
 			fatal_fr(r, "channel %d: consume", c->self);
 		/* version, method */
 		if ((r = sshbuf_put_u8(output, 0x05)) != 0 ||
 		    (r = sshbuf_put_u8(output, SSH_SOCKS5_NOAUTH)) != 0)
 			fatal_fr(r, "channel %d: append reply", c->self);
 		c->flags |= SSH_SOCKS5_AUTHDONE;
 		debug2("channel %d: socks5 auth done", c->self);
 		return 0;				/* need more */
 	}
 	debug2("channel %d: socks5 post auth", c->self);
 	if (have < sizeof(s5_req)+1)
 		return 0;			/* need more */
 	memcpy(&s5_req, p, sizeof(s5_req));
 	if (s5_req.version != 0x05 ||
 	    s5_req.command != SSH_SOCKS5_CONNECT ||
 	    s5_req.reserved != 0x00) {
 		debug2("channel %d: only socks5 connect supported", c->self);
 		return -1;
 	}
 	switch (s5_req.atyp){
 	case SSH_SOCKS5_IPV4:
 		addrlen = 4;
 		af = AF_INET;
 		break;
 	case SSH_SOCKS5_DOMAIN:
 		addrlen = p[sizeof(s5_req)];
 		af = -1;
 		break;
 	case SSH_SOCKS5_IPV6:
 		addrlen = 16;
 		af = AF_INET6;
 		break;
 	default:
 		debug2("channel %d: bad socks5 atyp %d", c->self, s5_req.atyp);
 		return -1;
 	}
 	need = sizeof(s5_req) + addrlen + 2;
 	if (s5_req.atyp == SSH_SOCKS5_DOMAIN)
 		need++;
 	if (have < need)
 		return 0;
 	if ((r = sshbuf_consume(input, sizeof(s5_req))) != 0)
 		fatal_fr(r, "channel %d: consume", c->self);
 	if (s5_req.atyp == SSH_SOCKS5_DOMAIN) {
 		/* host string length */
 		if ((r = sshbuf_consume(input, 1)) != 0)
 			fatal_fr(r, "channel %d: consume", c->self);
 	}
 	if ((r = sshbuf_get(input, &dest_addr, addrlen)) != 0 ||
 	    (r = sshbuf_get(input, &dest_port, 2)) != 0) {
 		debug_r(r, "channel %d: parse addr/port", c->self);
 		return -1;
 	}
 	dest_addr[addrlen] = '\0';
 	free(c->path);
 	c->path = NULL;
 	if (s5_req.atyp == SSH_SOCKS5_DOMAIN) {
 		if (addrlen >= NI_MAXHOST) {
 			error("channel %d: dynamic request: socks5 hostname "
 			    "\"%.100s\" too long", c->self, dest_addr);
 			return -1;
 		}
 		c->path = xstrdup(dest_addr);
 	} else {
 		if (inet_ntop(af, dest_addr, ntop, sizeof(ntop)) == NULL)
 			return -1;
 		c->path = xstrdup(ntop);
 	}
 	c->host_port = ntohs(dest_port);
 
 	debug2("channel %d: dynamic request: socks5 host %s port %u command %u",
 	    c->self, c->path, c->host_port, s5_req.command);
 
 	s5_rsp.version = 0x05;
 	s5_rsp.command = SSH_SOCKS5_SUCCESS;
 	s5_rsp.reserved = 0;			/* ignored */
 	s5_rsp.atyp = SSH_SOCKS5_IPV4;
 	dest_port = 0;				/* ignored */
 
 	if ((r = sshbuf_put(output, &s5_rsp, sizeof(s5_rsp))) != 0 ||
 	    (r = sshbuf_put_u32(output, ntohl(INADDR_ANY))) != 0 ||
 	    (r = sshbuf_put(output, &dest_port, sizeof(dest_port))) != 0)
 		fatal_fr(r, "channel %d: append reply", c->self);
 	return 1;
 }
 
 Channel *
 channel_connect_stdio_fwd(struct ssh *ssh,
     const char *host_to_connect, int port_to_connect,
     int in, int out, int nonblock)
 {
 	Channel *c;
 
 	debug_f("%s:%d", host_to_connect, port_to_connect);
 
 	c = channel_new(ssh, "stdio-forward", SSH_CHANNEL_OPENING, in, out,
 	    -1, CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
 	    0, "stdio-forward", nonblock);
 
 	c->path = xstrdup(host_to_connect);
 	c->host_port = port_to_connect;
 	c->listening_port = 0;
 	c->force_drain = 1;
 
 	channel_register_fds(ssh, c, in, out, -1, 0, 1, 0);
 	port_open_helper(ssh, c, port_to_connect == PORT_STREAMLOCAL ?
 	    "direct-streamlocal@openssh.com" : "direct-tcpip");
 
 	return c;
 }
 
 /* dynamic port forwarding */
 static void
 channel_pre_dynamic(struct ssh *ssh, Channel *c)
 {
 	const u_char *p;
 	u_int have;
 	int ret;
 
 	c->io_want = 0;
 	have = sshbuf_len(c->input);
 	debug2("channel %d: pre_dynamic: have %d", c->self, have);
 	/* sshbuf_dump(c->input, stderr); */
 	/* check if the fixed size part of the packet is in buffer. */
 	if (have < 3) {
 		/* need more */
 		c->io_want |= SSH_CHAN_IO_RFD;
 		return;
 	}
 	/* try to guess the protocol */
 	p = sshbuf_ptr(c->input);
 	/* XXX sshbuf_peek_u8? */
 	switch (p[0]) {
 	case 0x04:
 		ret = channel_decode_socks4(c, c->input, c->output);
 		break;
 	case 0x05:
 		ret = channel_decode_socks5(c, c->input, c->output);
 		break;
 	default:
 		ret = -1;
 		break;
 	}
 	if (ret < 0) {
 		chan_mark_dead(ssh, c);
 	} else if (ret == 0) {
 		debug2("channel %d: pre_dynamic: need more", c->self);
 		/* need more */
 		c->io_want |= SSH_CHAN_IO_RFD;
 		if (sshbuf_len(c->output))
 			c->io_want |= SSH_CHAN_IO_WFD;
 	} else {
 		/* switch to the next state */
 		c->type = SSH_CHANNEL_OPENING;
 		port_open_helper(ssh, c, "direct-tcpip");
 	}
 }
 
 /* simulate read-error */
 static void
 rdynamic_close(struct ssh *ssh, Channel *c)
 {
 	c->type = SSH_CHANNEL_OPEN;
 	channel_force_close(ssh, c, 0);
 }
 
 /* reverse dynamic port forwarding */
 static void
 channel_before_prepare_io_rdynamic(struct ssh *ssh, Channel *c)
 {
 	const u_char *p;
 	u_int have, len;
 	int r, ret;
 
 	have = sshbuf_len(c->output);
 	debug2("channel %d: pre_rdynamic: have %d", c->self, have);
 	/* sshbuf_dump(c->output, stderr); */
 	/* EOF received */
 	if (c->flags & CHAN_EOF_RCVD) {
 		if ((r = sshbuf_consume(c->output, have)) != 0)
 			fatal_fr(r, "channel %d: consume", c->self);
 		rdynamic_close(ssh, c);
 		return;
 	}
 	/* check if the fixed size part of the packet is in buffer. */
 	if (have < 3)
 		return;
 	/* try to guess the protocol */
 	p = sshbuf_ptr(c->output);
 	switch (p[0]) {
 	case 0x04:
 		/* switch input/output for reverse forwarding */
 		ret = channel_decode_socks4(c, c->output, c->input);
 		break;
 	case 0x05:
 		ret = channel_decode_socks5(c, c->output, c->input);
 		break;
 	default:
 		ret = -1;
 		break;
 	}
 	if (ret < 0) {
 		rdynamic_close(ssh, c);
 	} else if (ret == 0) {
 		debug2("channel %d: pre_rdynamic: need more", c->self);
 		/* send socks request to peer */
 		len = sshbuf_len(c->input);
 		if (len > 0 && len < c->remote_window) {
 			if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_DATA)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 			    (r = sshpkt_put_stringb(ssh, c->input)) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0) {
 				fatal_fr(r, "channel %i: rdynamic", c->self);
 			}
 			if ((r = sshbuf_consume(c->input, len)) != 0)
 				fatal_fr(r, "channel %d: consume", c->self);
 			c->remote_window -= len;
 		}
 	} else if (rdynamic_connect_finish(ssh, c) < 0) {
 		/* the connect failed */
 		rdynamic_close(ssh, c);
 	}
 }
 
 /* This is our fake X11 server socket. */
 static void
 channel_post_x11_listener(struct ssh *ssh, Channel *c)
 {
 	Channel *nc;
 	struct sockaddr_storage addr;
 	int r, newsock, oerrno, remote_port;
 	socklen_t addrlen;
 	char buf[16384], *remote_ipaddr;
 
 	if ((c->io_ready & SSH_CHAN_IO_SOCK_R) == 0)
 		return;
 
 	debug("X11 connection requested.");
 	addrlen = sizeof(addr);
 	newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen);
 	if (c->single_connection) {
 		oerrno = errno;
 		debug2("single_connection: closing X11 listener.");
 		channel_close_fd(ssh, c, &c->sock);
 		chan_mark_dead(ssh, c);
 		errno = oerrno;
 	}
 	if (newsock == -1) {
 		if (errno != EINTR && errno != EWOULDBLOCK &&
 		    errno != ECONNABORTED)
 			error("accept: %.100s", strerror(errno));
 		if (errno == EMFILE || errno == ENFILE)
 			c->notbefore = monotime() + 1;
 		return;
 	}
 	set_nodelay(newsock);
 	remote_ipaddr = get_peer_ipaddr(newsock);
 	remote_port = get_peer_port(newsock);
 	snprintf(buf, sizeof buf, "X11 connection from %.200s port %d",
 	    remote_ipaddr, remote_port);
 
 	nc = channel_new(ssh, "x11-connection",
 	    SSH_CHANNEL_OPENING, newsock, newsock, -1,
 	    c->local_window_max, c->local_maxpacket, 0, buf, 1);
 	open_preamble(ssh, __func__, nc, "x11");
 	if ((r = sshpkt_put_cstring(ssh, remote_ipaddr)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, remote_port)) != 0) {
 		fatal_fr(r, "channel %i: reply", c->self);
 	}
 	if ((r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i: send", c->self);
 	free(remote_ipaddr);
 }
 
 static void
 port_open_helper(struct ssh *ssh, Channel *c, char *rtype)
 {
 	char *local_ipaddr = get_local_ipaddr(c->sock);
 	int local_port = c->sock == -1 ? 65536 : get_local_port(c->sock);
 	char *remote_ipaddr = get_peer_ipaddr(c->sock);
 	int remote_port = get_peer_port(c->sock);
 	int r;
 
 	if (remote_port == -1) {
 		/* Fake addr/port to appease peers that validate it (Tectia) */
 		free(remote_ipaddr);
 		remote_ipaddr = xstrdup("127.0.0.1");
 		remote_port = 65535;
 	}
 
 	free(c->remote_name);
 	xasprintf(&c->remote_name,
 	    "%s: listening port %d for %.100s port %d, "
 	    "connect from %.200s port %d to %.100s port %d",
 	    rtype, c->listening_port, c->path, c->host_port,
 	    remote_ipaddr, remote_port, local_ipaddr, local_port);
 
 	open_preamble(ssh, __func__, c, rtype);
 	if (strcmp(rtype, "direct-tcpip") == 0) {
 		/* target host, port */
 		if ((r = sshpkt_put_cstring(ssh, c->path)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->host_port)) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	} else if (strcmp(rtype, "direct-streamlocal@openssh.com") == 0) {
 		/* target path */
 		if ((r = sshpkt_put_cstring(ssh, c->path)) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	} else if (strcmp(rtype, "forwarded-streamlocal@openssh.com") == 0) {
 		/* listen path */
 		if ((r = sshpkt_put_cstring(ssh, c->path)) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	} else {
 		/* listen address, port */
 		if ((r = sshpkt_put_cstring(ssh, c->path)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, local_port)) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	}
 	if (strcmp(rtype, "forwarded-streamlocal@openssh.com") == 0) {
 		/* reserved for future owner/mode info */
 		if ((r = sshpkt_put_cstring(ssh, "")) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	} else {
 		/* originator host and port */
 		if ((r = sshpkt_put_cstring(ssh, remote_ipaddr)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)remote_port)) != 0)
 			fatal_fr(r, "channel %i: reply", c->self);
 	}
 	if ((r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i: send", c->self);
 	free(remote_ipaddr);
 	free(local_ipaddr);
 }
 
 void
 channel_set_x11_refuse_time(struct ssh *ssh, time_t refuse_time)
 {
 	ssh->chanctxt->x11_refuse_time = refuse_time;
 }
 
 /*
  * This socket is listening for connections to a forwarded TCP/IP port.
  */
 static void
 channel_post_port_listener(struct ssh *ssh, Channel *c)
 {
 	Channel *nc;
 	struct sockaddr_storage addr;
 	int newsock, nextstate;
 	socklen_t addrlen;
 	char *rtype;
 
 	if ((c->io_ready & SSH_CHAN_IO_SOCK_R) == 0)
 		return;
 
 	debug("Connection to port %d forwarding to %.100s port %d requested.",
 	    c->listening_port, c->path, c->host_port);
 
 	if (c->type == SSH_CHANNEL_RPORT_LISTENER) {
 		nextstate = SSH_CHANNEL_OPENING;
 		rtype = "forwarded-tcpip";
 	} else if (c->type == SSH_CHANNEL_RUNIX_LISTENER) {
 		nextstate = SSH_CHANNEL_OPENING;
 		rtype = "forwarded-streamlocal@openssh.com";
 	} else if (c->host_port == PORT_STREAMLOCAL) {
 		nextstate = SSH_CHANNEL_OPENING;
 		rtype = "direct-streamlocal@openssh.com";
 	} else if (c->host_port == 0) {
 		nextstate = SSH_CHANNEL_DYNAMIC;
 		rtype = "dynamic-tcpip";
 	} else {
 		nextstate = SSH_CHANNEL_OPENING;
 		rtype = "direct-tcpip";
 	}
 
 	addrlen = sizeof(addr);
 	newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen);
 	if (newsock == -1) {
 		if (errno != EINTR && errno != EWOULDBLOCK &&
 		    errno != ECONNABORTED)
 			error("accept: %.100s", strerror(errno));
 		if (errno == EMFILE || errno == ENFILE)
 			c->notbefore = monotime() + 1;
 		return;
 	}
 	if (c->host_port != PORT_STREAMLOCAL)
 		set_nodelay(newsock);
 	nc = channel_new(ssh, rtype, nextstate, newsock, newsock, -1,
 	    c->local_window_max, c->local_maxpacket, 0, rtype, 1);
 	nc->listening_port = c->listening_port;
 	nc->host_port = c->host_port;
 	if (c->path != NULL)
 		nc->path = xstrdup(c->path);
 
 	if (nextstate != SSH_CHANNEL_DYNAMIC)
 		port_open_helper(ssh, nc, rtype);
 }
 
 /*
  * This is the authentication agent socket listening for connections from
  * clients.
  */
 static void
 channel_post_auth_listener(struct ssh *ssh, Channel *c)
 {
 	Channel *nc;
 	int r, newsock;
 	struct sockaddr_storage addr;
 	socklen_t addrlen;
 
 	if ((c->io_ready & SSH_CHAN_IO_SOCK_R) == 0)
 		return;
 
 	addrlen = sizeof(addr);
 	newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen);
 	if (newsock == -1) {
 		error("accept from auth socket: %.100s", strerror(errno));
 		if (errno == EMFILE || errno == ENFILE)
 			c->notbefore = monotime() + 1;
 		return;
 	}
 	nc = channel_new(ssh, "agent-connection",
 	    SSH_CHANNEL_OPENING, newsock, newsock, -1,
 	    c->local_window_max, c->local_maxpacket,
 	    0, "accepted auth socket", 1);
 	open_preamble(ssh, __func__, nc, "auth-agent@openssh.com");
 	if ((r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i", c->self);
 }
 
 static void
 channel_post_connecting(struct ssh *ssh, Channel *c)
 {
 	int err = 0, sock, isopen, r;
 	socklen_t sz = sizeof(err);
 
 	if ((c->io_ready & SSH_CHAN_IO_SOCK_W) == 0)
 		return;
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote id", c->self);
 	/* for rdynamic the OPEN_CONFIRMATION has been sent already */
 	isopen = (c->type == SSH_CHANNEL_RDYNAMIC_FINISH);
 
 	if (getsockopt(c->sock, SOL_SOCKET, SO_ERROR, &err, &sz) == -1) {
 		err = errno;
 		error("getsockopt SO_ERROR failed");
 	}
 
 	if (err == 0) {
 		/* Non-blocking connection completed */
 		debug("channel %d: connected to %s port %d",
 		    c->self, c->connect_ctx.host, c->connect_ctx.port);
 		channel_connect_ctx_free(&c->connect_ctx);
 		c->type = SSH_CHANNEL_OPEN;
-		c->lastused = monotime();
+		channel_set_used_time(ssh, c);
 		if (isopen) {
 			/* no message necessary */
 		} else {
 			if ((r = sshpkt_start(ssh,
 			    SSH2_MSG_CHANNEL_OPEN_CONFIRMATION)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->self)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->local_window)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->local_maxpacket)) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0)
 				fatal_fr(r, "channel %i open confirm", c->self);
 		}
 		return;
 	}
 	if (err == EINTR || err == EAGAIN || err == EINPROGRESS)
 		return;
 
 	/* Non-blocking connection failed */
 	debug("channel %d: connection failed: %s", c->self, strerror(err));
 
 	/* Try next address, if any */
 	if ((sock = connect_next(&c->connect_ctx)) == -1) {
 		/* Exhausted all addresses for this destination */
 		error("connect_to %.100s port %d: failed.",
 		    c->connect_ctx.host, c->connect_ctx.port);
 		channel_connect_ctx_free(&c->connect_ctx);
 		if (isopen) {
 			rdynamic_close(ssh, c);
 		} else {
 			if ((r = sshpkt_start(ssh,
 			    SSH2_MSG_CHANNEL_OPEN_FAILURE)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 			    (r = sshpkt_put_u32(ssh,
 			    SSH2_OPEN_CONNECT_FAILED)) != 0 ||
 			    (r = sshpkt_put_cstring(ssh, strerror(err))) != 0 ||
 			    (r = sshpkt_put_cstring(ssh, "")) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0)
 				fatal_fr(r, "channel %i: failure", c->self);
 			chan_mark_dead(ssh, c);
 		}
 	}
 
 	/* New non-blocking connection in progress */
 	close(c->sock);
 	c->sock = c->rfd = c->wfd = sock;
 }
 
 static int
 channel_handle_rfd(struct ssh *ssh, Channel *c)
 {
 	char buf[CHAN_RBUF];
 	ssize_t len;
 	int r, force;
 	size_t nr = 0, have, avail, maxlen = CHANNEL_MAX_READ;
 	int pty_zeroread = 0;
 
 #ifdef PTY_ZEROREAD
 	/* Bug on AIX: read(1) can return 0 for a non-closed fd */
 	pty_zeroread = c->isatty;
 #endif
 
 	force = c->isatty && c->detach_close && c->istate != CHAN_INPUT_CLOSED;
 
 	if (!force && (c->io_ready & SSH_CHAN_IO_RFD) == 0)
 		return 1;
 	if ((avail = sshbuf_avail(c->input)) == 0)
 		return 1; /* Shouldn't happen */
 
 	/*
 	 * For "simple" channels (i.e. not datagram or filtered), we can
 	 * read directly to the channel buffer.
 	 */
 	if (!pty_zeroread && c->input_filter == NULL && !c->datagram) {
 		/* Only OPEN channels have valid rwin */
 		if (c->type == SSH_CHANNEL_OPEN) {
 			if ((have = sshbuf_len(c->input)) >= c->remote_window)
 				return 1; /* shouldn't happen */
 			if (maxlen > c->remote_window - have)
 				maxlen = c->remote_window - have;
 		}
 		if (maxlen > avail)
 			maxlen = avail;
 		if ((r = sshbuf_read(c->rfd, c->input, maxlen, &nr)) != 0) {
 			if (errno == EINTR || (!force &&
 			    (errno == EAGAIN || errno == EWOULDBLOCK)))
 				return 1;
 			debug2("channel %d: read failed rfd %d maxlen %zu: %s",
 			    c->self, c->rfd, maxlen, ssh_err(r));
 			goto rfail;
 		}
 		if (nr != 0)
-			c->lastused = monotime();
+			channel_set_used_time(ssh, c);
 		return 1;
 	}
 
 	errno = 0;
 	len = read(c->rfd, buf, sizeof(buf));
 	/* fixup AIX zero-length read with errno set to look more like errors */
 	if (pty_zeroread && len == 0 && errno != 0)
 		len = -1;
 	if (len == -1 && (errno == EINTR ||
 	    ((errno == EAGAIN || errno == EWOULDBLOCK) && !force)))
 		return 1;
 	if (len < 0 || (!pty_zeroread && len == 0)) {
 		debug2("channel %d: read<=0 rfd %d len %zd: %s",
 		    c->self, c->rfd, len,
 		    len == 0 ? "closed" : strerror(errno));
  rfail:
 		if (c->type != SSH_CHANNEL_OPEN) {
 			debug2("channel %d: not open", c->self);
 			chan_mark_dead(ssh, c);
 			return -1;
 		} else {
 			chan_read_failed(ssh, c);
 		}
 		return -1;
 	}
-	c->lastused = monotime();
+	channel_set_used_time(ssh, c);
 	if (c->input_filter != NULL) {
 		if (c->input_filter(ssh, c, buf, len) == -1) {
 			debug2("channel %d: filter stops", c->self);
 			chan_read_failed(ssh, c);
 		}
 	} else if (c->datagram) {
 		if ((r = sshbuf_put_string(c->input, buf, len)) != 0)
 			fatal_fr(r, "channel %i: put datagram", c->self);
 	} else if ((r = sshbuf_put(c->input, buf, len)) != 0)
 		fatal_fr(r, "channel %i: put data", c->self);
 
 	return 1;
 }
 
 static int
 channel_handle_wfd(struct ssh *ssh, Channel *c)
 {
 	struct termios tio;
 	u_char *data = NULL, *buf; /* XXX const; need filter API change */
 	size_t dlen, olen = 0;
 	int r, len;
 
 	if ((c->io_ready & SSH_CHAN_IO_WFD) == 0)
 		return 1;
 	if (sshbuf_len(c->output) == 0)
 		return 1;
 
 	/* Send buffered output data to the socket. */
 	olen = sshbuf_len(c->output);
 	if (c->output_filter != NULL) {
 		if ((buf = c->output_filter(ssh, c, &data, &dlen)) == NULL) {
 			debug2("channel %d: filter stops", c->self);
 			if (c->type != SSH_CHANNEL_OPEN)
 				chan_mark_dead(ssh, c);
 			else
 				chan_write_failed(ssh, c);
 			return -1;
 		}
 	} else if (c->datagram) {
 		if ((r = sshbuf_get_string(c->output, &data, &dlen)) != 0)
 			fatal_fr(r, "channel %i: get datagram", c->self);
 		buf = data;
 	} else {
 		buf = data = sshbuf_mutable_ptr(c->output);
 		dlen = sshbuf_len(c->output);
 	}
 
 	if (c->datagram) {
 		/* ignore truncated writes, datagrams might get lost */
 		len = write(c->wfd, buf, dlen);
 		free(data);
 		if (len == -1 && (errno == EINTR || errno == EAGAIN ||
 		    errno == EWOULDBLOCK))
 			return 1;
 		if (len <= 0)
 			goto write_fail;
 		goto out;
 	}
 
 #ifdef _AIX
 	/* XXX: Later AIX versions can't push as much data to tty */
 	if (c->wfd_isatty)
 		dlen = MINIMUM(dlen, 8*1024);
 #endif
 
 	len = write(c->wfd, buf, dlen);
 	if (len == -1 &&
 	    (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK))
 		return 1;
 	if (len <= 0) {
  write_fail:
 		if (c->type != SSH_CHANNEL_OPEN) {
 			debug2("channel %d: not open", c->self);
 			chan_mark_dead(ssh, c);
 			return -1;
 		} else {
 			chan_write_failed(ssh, c);
 		}
 		return -1;
 	}
-	c->lastused = monotime();
+	channel_set_used_time(ssh, c);
 #ifndef BROKEN_TCGETATTR_ICANON
 	if (c->isatty && dlen >= 1 && buf[0] != '\r') {
 		if (tcgetattr(c->wfd, &tio) == 0 &&
 		    !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) {
 			/*
 			 * Simulate echo to reduce the impact of
 			 * traffic analysis. We need to match the
 			 * size of a SSH2_MSG_CHANNEL_DATA message
 			 * (4 byte channel id + buf)
 			 */
 			if ((r = sshpkt_msg_ignore(ssh, 4+len)) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0)
 				fatal_fr(r, "channel %i: ignore", c->self);
 		}
 	}
 #endif /* BROKEN_TCGETATTR_ICANON */
 	if ((r = sshbuf_consume(c->output, len)) != 0)
 		fatal_fr(r, "channel %i: consume", c->self);
  out:
 	c->local_consumed += olen - sshbuf_len(c->output);
 
 	return 1;
 }
 
 static int
 channel_handle_efd_write(struct ssh *ssh, Channel *c)
 {
 	int r;
 	ssize_t len;
 
 	if ((c->io_ready & SSH_CHAN_IO_EFD_W) == 0)
 		return 1;
 	if (sshbuf_len(c->extended) == 0)
 		return 1;
 
 	len = write(c->efd, sshbuf_ptr(c->extended),
 	    sshbuf_len(c->extended));
 	debug2("channel %d: written %zd to efd %d", c->self, len, c->efd);
 	if (len == -1 && (errno == EINTR || errno == EAGAIN ||
 	    errno == EWOULDBLOCK))
 		return 1;
 	if (len <= 0) {
 		debug2("channel %d: closing write-efd %d", c->self, c->efd);
 		channel_close_fd(ssh, c, &c->efd);
 	} else {
 		if ((r = sshbuf_consume(c->extended, len)) != 0)
 			fatal_fr(r, "channel %i: consume", c->self);
 		c->local_consumed += len;
-		c->lastused = monotime();
+		channel_set_used_time(ssh, c);
 	}
 	return 1;
 }
 
 static int
 channel_handle_efd_read(struct ssh *ssh, Channel *c)
 {
 	char buf[CHAN_RBUF];
 	ssize_t len;
 	int r, force;
 
 	force = c->isatty && c->detach_close && c->istate != CHAN_INPUT_CLOSED;
 
 	if (!force && (c->io_ready & SSH_CHAN_IO_EFD_R) == 0)
 		return 1;
 
 	len = read(c->efd, buf, sizeof(buf));
 	debug2("channel %d: read %zd from efd %d", c->self, len, c->efd);
 	if (len == -1 && (errno == EINTR || ((errno == EAGAIN ||
 	    errno == EWOULDBLOCK) && !force)))
 		return 1;
 	if (len <= 0) {
 		debug2("channel %d: closing read-efd %d", c->self, c->efd);
 		channel_close_fd(ssh, c, &c->efd);
 		return 1;
 	}
-	c->lastused = monotime();
+	channel_set_used_time(ssh, c);
 	if (c->extended_usage == CHAN_EXTENDED_IGNORE)
 		debug3("channel %d: discard efd", c->self);
 	else if ((r = sshbuf_put(c->extended, buf, len)) != 0)
 		fatal_fr(r, "channel %i: append", c->self);
 	return 1;
 }
 
 static int
 channel_handle_efd(struct ssh *ssh, Channel *c)
 {
 	if (c->efd == -1)
 		return 1;
 
 	/** XXX handle drain efd, too */
 
 	if (c->extended_usage == CHAN_EXTENDED_WRITE)
 		return channel_handle_efd_write(ssh, c);
 	else if (c->extended_usage == CHAN_EXTENDED_READ ||
 	    c->extended_usage == CHAN_EXTENDED_IGNORE)
 		return channel_handle_efd_read(ssh, c);
 
 	return 1;
 }
 
 static int
 channel_check_window(struct ssh *ssh, Channel *c)
 {
 	int r;
 
 	if (c->type == SSH_CHANNEL_OPEN &&
 	    !(c->flags & (CHAN_CLOSE_SENT|CHAN_CLOSE_RCVD)) &&
 	    ((c->local_window_max - c->local_window >
 	    c->local_maxpacket*3) ||
 	    c->local_window < c->local_window_max/2) &&
 	    c->local_consumed > 0) {
 		if (!c->have_remote_id)
 			fatal_f("channel %d: no remote id", c->self);
 		if ((r = sshpkt_start(ssh,
 		    SSH2_MSG_CHANNEL_WINDOW_ADJUST)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->local_consumed)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0) {
 			fatal_fr(r, "channel %i", c->self);
 		}
 		debug2("channel %d: window %d sent adjust %d", c->self,
 		    c->local_window, c->local_consumed);
 		c->local_window += c->local_consumed;
 		c->local_consumed = 0;
 	}
 	return 1;
 }
 
 static void
 channel_post_open(struct ssh *ssh, Channel *c)
 {
 	channel_handle_rfd(ssh, c);
 	channel_handle_wfd(ssh, c);
 	channel_handle_efd(ssh, c);
 	channel_check_window(ssh, c);
 }
 
 static u_int
 read_mux(struct ssh *ssh, Channel *c, u_int need)
 {
 	char buf[CHAN_RBUF];
 	ssize_t len;
 	u_int rlen;
 	int r;
 
 	if (sshbuf_len(c->input) < need) {
 		rlen = need - sshbuf_len(c->input);
 		len = read(c->rfd, buf, MINIMUM(rlen, CHAN_RBUF));
 		if (len == -1 && (errno == EINTR || errno == EAGAIN))
 			return sshbuf_len(c->input);
 		if (len <= 0) {
 			debug2("channel %d: ctl read<=0 rfd %d len %zd",
 			    c->self, c->rfd, len);
 			chan_read_failed(ssh, c);
 			return 0;
 		} else if ((r = sshbuf_put(c->input, buf, len)) != 0)
 			fatal_fr(r, "channel %i: append", c->self);
 	}
 	return sshbuf_len(c->input);
 }
 
 static void
 channel_post_mux_client_read(struct ssh *ssh, Channel *c)
 {
 	u_int need;
 
 	if ((c->io_ready & SSH_CHAN_IO_RFD) == 0)
 		return;
 	if (c->istate != CHAN_INPUT_OPEN && c->istate != CHAN_INPUT_WAIT_DRAIN)
 		return;
 	if (c->mux_pause)
 		return;
 
 	/*
 	 * Don't not read past the precise end of packets to
 	 * avoid disrupting fd passing.
 	 */
 	if (read_mux(ssh, c, 4) < 4) /* read header */
 		return;
 	/* XXX sshbuf_peek_u32 */
 	need = PEEK_U32(sshbuf_ptr(c->input));
 #define CHANNEL_MUX_MAX_PACKET	(256 * 1024)
 	if (need > CHANNEL_MUX_MAX_PACKET) {
 		debug2("channel %d: packet too big %u > %u",
 		    c->self, CHANNEL_MUX_MAX_PACKET, need);
 		chan_rcvd_oclose(ssh, c);
 		return;
 	}
 	if (read_mux(ssh, c, need + 4) < need + 4) /* read body */
 		return;
 	if (c->mux_rcb(ssh, c) != 0) {
 		debug("channel %d: mux_rcb failed", c->self);
 		chan_mark_dead(ssh, c);
 		return;
 	}
 }
 
 static void
 channel_post_mux_client_write(struct ssh *ssh, Channel *c)
 {
 	ssize_t len;
 	int r;
 
 	if ((c->io_ready & SSH_CHAN_IO_WFD) == 0)
 		return;
 	if (sshbuf_len(c->output) == 0)
 		return;
 
 	len = write(c->wfd, sshbuf_ptr(c->output), sshbuf_len(c->output));
 	if (len == -1 && (errno == EINTR || errno == EAGAIN))
 		return;
 	if (len <= 0) {
 		chan_mark_dead(ssh, c);
 		return;
 	}
 	if ((r = sshbuf_consume(c->output, len)) != 0)
 		fatal_fr(r, "channel %i: consume", c->self);
 }
 
 static void
 channel_post_mux_client(struct ssh *ssh, Channel *c)
 {
 	channel_post_mux_client_read(ssh, c);
 	channel_post_mux_client_write(ssh, c);
 }
 
 static void
 channel_post_mux_listener(struct ssh *ssh, Channel *c)
 {
 	Channel *nc;
 	struct sockaddr_storage addr;
 	socklen_t addrlen;
 	int newsock;
 	uid_t euid;
 	gid_t egid;
 
 	if ((c->io_ready & SSH_CHAN_IO_SOCK_R) == 0)
 		return;
 
 	debug("multiplexing control connection");
 
 	/*
 	 * Accept connection on control socket
 	 */
 	memset(&addr, 0, sizeof(addr));
 	addrlen = sizeof(addr);
 	if ((newsock = accept(c->sock, (struct sockaddr*)&addr,
 	    &addrlen)) == -1) {
 		error_f("accept: %s", strerror(errno));
 		if (errno == EMFILE || errno == ENFILE)
 			c->notbefore = monotime() + 1;
 		return;
 	}
 
 	if (getpeereid(newsock, &euid, &egid) == -1) {
 		error_f("getpeereid failed: %s", strerror(errno));
 		close(newsock);
 		return;
 	}
 	if ((euid != 0) && (getuid() != euid)) {
 		error("multiplex uid mismatch: peer euid %u != uid %u",
 		    (u_int)euid, (u_int)getuid());
 		close(newsock);
 		return;
 	}
 	nc = channel_new(ssh, "mux-control", SSH_CHANNEL_MUX_CLIENT,
 	    newsock, newsock, -1, c->local_window_max,
 	    c->local_maxpacket, 0, "mux-control", 1);
 	nc->mux_rcb = c->mux_rcb;
 	debug3_f("new mux channel %d fd %d", nc->self, nc->sock);
 	/* establish state */
 	nc->mux_rcb(ssh, nc);
 	/* mux state transitions must not elicit protocol messages */
 	nc->flags |= CHAN_LOCAL;
 }
 
 static void
 channel_handler_init(struct ssh_channels *sc)
 {
 	chan_fn **pre, **post;
 
 	if ((pre = calloc(SSH_CHANNEL_MAX_TYPE, sizeof(*pre))) == NULL ||
 	    (post = calloc(SSH_CHANNEL_MAX_TYPE, sizeof(*post))) == NULL)
 		fatal_f("allocation failed");
 
 	pre[SSH_CHANNEL_OPEN] =			&channel_pre_open;
 	pre[SSH_CHANNEL_X11_OPEN] =		&channel_pre_x11_open;
 	pre[SSH_CHANNEL_PORT_LISTENER] =	&channel_pre_listener;
 	pre[SSH_CHANNEL_RPORT_LISTENER] =	&channel_pre_listener;
 	pre[SSH_CHANNEL_UNIX_LISTENER] =	&channel_pre_listener;
 	pre[SSH_CHANNEL_RUNIX_LISTENER] =	&channel_pre_listener;
 	pre[SSH_CHANNEL_X11_LISTENER] =		&channel_pre_listener;
 	pre[SSH_CHANNEL_AUTH_SOCKET] =		&channel_pre_listener;
 	pre[SSH_CHANNEL_CONNECTING] =		&channel_pre_connecting;
 	pre[SSH_CHANNEL_DYNAMIC] =		&channel_pre_dynamic;
 	pre[SSH_CHANNEL_RDYNAMIC_FINISH] =	&channel_pre_connecting;
 	pre[SSH_CHANNEL_MUX_LISTENER] =		&channel_pre_listener;
 	pre[SSH_CHANNEL_MUX_CLIENT] =		&channel_pre_mux_client;
 
 	post[SSH_CHANNEL_OPEN] =		&channel_post_open;
 	post[SSH_CHANNEL_PORT_LISTENER] =	&channel_post_port_listener;
 	post[SSH_CHANNEL_RPORT_LISTENER] =	&channel_post_port_listener;
 	post[SSH_CHANNEL_UNIX_LISTENER] =	&channel_post_port_listener;
 	post[SSH_CHANNEL_RUNIX_LISTENER] =	&channel_post_port_listener;
 	post[SSH_CHANNEL_X11_LISTENER] =	&channel_post_x11_listener;
 	post[SSH_CHANNEL_AUTH_SOCKET] =		&channel_post_auth_listener;
 	post[SSH_CHANNEL_CONNECTING] =		&channel_post_connecting;
 	post[SSH_CHANNEL_DYNAMIC] =		&channel_post_open;
 	post[SSH_CHANNEL_RDYNAMIC_FINISH] =	&channel_post_connecting;
 	post[SSH_CHANNEL_MUX_LISTENER] =	&channel_post_mux_listener;
 	post[SSH_CHANNEL_MUX_CLIENT] =		&channel_post_mux_client;
 
 	sc->channel_pre = pre;
 	sc->channel_post = post;
 }
 
 /* gc dead channels */
 static void
 channel_garbage_collect(struct ssh *ssh, Channel *c)
 {
 	if (c == NULL)
 		return;
 	if (c->detach_user != NULL) {
 		if (!chan_is_dead(ssh, c, c->detach_close))
 			return;
 
 		debug2("channel %d: gc: notify user", c->self);
 		c->detach_user(ssh, c->self, 0, NULL);
 		/* if we still have a callback */
 		if (c->detach_user != NULL)
 			return;
 		debug2("channel %d: gc: user detached", c->self);
 	}
 	if (!chan_is_dead(ssh, c, 1))
 		return;
 	debug2("channel %d: garbage collecting", c->self);
 	channel_free(ssh, c);
 }
 
 enum channel_table { CHAN_PRE, CHAN_POST };
 
 static void
 channel_handler(struct ssh *ssh, int table, struct timespec *timeout)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	chan_fn **ftab = table == CHAN_PRE ? sc->channel_pre : sc->channel_post;
 	u_int i, oalloc;
 	Channel *c;
 	time_t now;
 
 	now = monotime();
 	for (i = 0, oalloc = sc->channels_alloc; i < oalloc; i++) {
 		c = sc->channels[i];
 		if (c == NULL)
 			continue;
 		/* Try to keep IO going while rekeying */
 		if (ssh_packet_is_rekeying(ssh) && c->type != SSH_CHANNEL_OPEN)
 			continue;
 		if (c->delayed) {
 			if (table == CHAN_PRE)
 				c->delayed = 0;
 			else
 				continue;
 		}
 		if (ftab[c->type] != NULL) {
-			if (table == CHAN_PRE &&
-			    c->type == SSH_CHANNEL_OPEN &&
-			    c->inactive_deadline != 0 && c->lastused != 0 &&
-			    now >= c->lastused + c->inactive_deadline) {
+			if (table == CHAN_PRE && c->type == SSH_CHANNEL_OPEN &&
+			    channel_get_expiry(ssh, c) != 0 &&
+			    now >= channel_get_expiry(ssh, c)) {
 				/* channel closed for inactivity */
 				verbose("channel %d: closing after %u seconds "
 				    "of inactivity", c->self,
 				    c->inactive_deadline);
 				channel_force_close(ssh, c, 1);
 			} else if (c->notbefore <= now) {
 				/* Run handlers that are not paused. */
 				(*ftab[c->type])(ssh, c);
 				/* inactivity timeouts must interrupt poll() */
 				if (timeout != NULL &&
 				    c->type == SSH_CHANNEL_OPEN &&
-				    c->lastused != 0 &&
-				    c->inactive_deadline != 0) {
+				    channel_get_expiry(ssh, c) != 0) {
 					ptimeout_deadline_monotime(timeout,
-					    c->lastused + c->inactive_deadline);
+					    channel_get_expiry(ssh, c));
 				}
 			} else if (timeout != NULL) {
 				/*
 				 * Arrange for poll() wakeup when channel pause
 				 * timer expires.
 				 */
 				ptimeout_deadline_monotime(timeout,
 				    c->notbefore);
 			}
 		}
 		channel_garbage_collect(ssh, c);
 	}
 }
 
 /*
  * Create sockets before preparing IO.
  * This is necessary for things that need to happen after reading
  * the network-input but need to be completed before IO event setup, e.g.
  * because they may create new channels.
  */
 static void
 channel_before_prepare_io(struct ssh *ssh)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	Channel *c;
 	u_int i, oalloc;
 
 	for (i = 0, oalloc = sc->channels_alloc; i < oalloc; i++) {
 		c = sc->channels[i];
 		if (c == NULL)
 			continue;
 		if (c->type == SSH_CHANNEL_RDYNAMIC_OPEN)
 			channel_before_prepare_io_rdynamic(ssh, c);
 	}
 }
 
 static void
 dump_channel_poll(const char *func, const char *what, Channel *c,
     u_int pollfd_offset, struct pollfd *pfd)
 {
 #ifdef DEBUG_CHANNEL_POLL
 	debug3("%s: channel %d: %s r%d w%d e%d s%d c->pfds [ %d %d %d %d ] "
 	    "io_want 0x%02x io_ready 0x%02x pfd[%u].fd=%d "
 	    "pfd.ev 0x%02x pfd.rev 0x%02x", func, c->self, what,
 	    c->rfd, c->wfd, c->efd, c->sock,
 	    c->pfds[0], c->pfds[1], c->pfds[2], c->pfds[3],
 	    c->io_want, c->io_ready,
 	    pollfd_offset, pfd->fd, pfd->events, pfd->revents);
 #endif
 }
 
 /* Prepare pollfd entries for a single channel */
 static void
 channel_prepare_pollfd(Channel *c, u_int *next_pollfd,
     struct pollfd *pfd, u_int npfd)
 {
 	u_int ev, p = *next_pollfd;
 
 	if (c == NULL)
 		return;
 	if (p + 4 > npfd) {
 		/* Shouldn't happen */
 		fatal_f("channel %d: bad pfd offset %u (max %u)",
 		    c->self, p, npfd);
 	}
 	c->pfds[0] = c->pfds[1] = c->pfds[2] = c->pfds[3] = -1;
 	/*
 	 * prepare c->rfd
 	 *
 	 * This is a special case, since c->rfd might be the same as
 	 * c->wfd, c->efd and/or c->sock. Handle those here if they want
 	 * IO too.
 	 */
 	if (c->rfd != -1) {
 		ev = 0;
 		if ((c->io_want & SSH_CHAN_IO_RFD) != 0)
 			ev |= POLLIN;
 		/* rfd == wfd */
 		if (c->wfd == c->rfd) {
 			if ((c->io_want & SSH_CHAN_IO_WFD) != 0)
 				ev |= POLLOUT;
 		}
 		/* rfd == efd */
 		if (c->efd == c->rfd) {
 			if ((c->io_want & SSH_CHAN_IO_EFD_R) != 0)
 				ev |= POLLIN;
 			if ((c->io_want & SSH_CHAN_IO_EFD_W) != 0)
 				ev |= POLLOUT;
 		}
 		/* rfd == sock */
 		if (c->sock == c->rfd) {
 			if ((c->io_want & SSH_CHAN_IO_SOCK_R) != 0)
 				ev |= POLLIN;
 			if ((c->io_want & SSH_CHAN_IO_SOCK_W) != 0)
 				ev |= POLLOUT;
 		}
 		/* Pack a pfd entry if any event armed for this fd */
 		if (ev != 0) {
 			c->pfds[0] = p;
 			pfd[p].fd = c->rfd;
 			pfd[p].events = ev;
 			dump_channel_poll(__func__, "rfd", c, p, &pfd[p]);
 			p++;
 		}
 	}
 	/* prepare c->wfd if wanting IO and not already handled above */
 	if (c->wfd != -1 && c->rfd != c->wfd) {
 		ev = 0;
 		if ((c->io_want & SSH_CHAN_IO_WFD))
 			ev |= POLLOUT;
 		/* Pack a pfd entry if any event armed for this fd */
 		if (ev != 0) {
 			c->pfds[1] = p;
 			pfd[p].fd = c->wfd;
 			pfd[p].events = ev;
 			dump_channel_poll(__func__, "wfd", c, p, &pfd[p]);
 			p++;
 		}
 	}
 	/* prepare c->efd if wanting IO and not already handled above */
 	if (c->efd != -1 && c->rfd != c->efd) {
 		ev = 0;
 		if ((c->io_want & SSH_CHAN_IO_EFD_R) != 0)
 			ev |= POLLIN;
 		if ((c->io_want & SSH_CHAN_IO_EFD_W) != 0)
 			ev |= POLLOUT;
 		/* Pack a pfd entry if any event armed for this fd */
 		if (ev != 0) {
 			c->pfds[2] = p;
 			pfd[p].fd = c->efd;
 			pfd[p].events = ev;
 			dump_channel_poll(__func__, "efd", c, p, &pfd[p]);
 			p++;
 		}
 	}
 	/* prepare c->sock if wanting IO and not already handled above */
 	if (c->sock != -1 && c->rfd != c->sock) {
 		ev = 0;
 		if ((c->io_want & SSH_CHAN_IO_SOCK_R) != 0)
 			ev |= POLLIN;
 		if ((c->io_want & SSH_CHAN_IO_SOCK_W) != 0)
 			ev |= POLLOUT;
 		/* Pack a pfd entry if any event armed for this fd */
 		if (ev != 0) {
 			c->pfds[3] = p;
 			pfd[p].fd = c->sock;
 			pfd[p].events = 0;
 			dump_channel_poll(__func__, "sock", c, p, &pfd[p]);
 			p++;
 		}
 	}
 	*next_pollfd = p;
 }
 
 /* * Allocate/prepare poll structure */
 void
 channel_prepare_poll(struct ssh *ssh, struct pollfd **pfdp, u_int *npfd_allocp,
     u_int *npfd_activep, u_int npfd_reserved, struct timespec *timeout)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	u_int i, oalloc, p, npfd = npfd_reserved;
 
 	channel_before_prepare_io(ssh); /* might create a new channel */
 	/* clear out I/O flags from last poll */
 	for (i = 0; i < sc->channels_alloc; i++) {
 		if (sc->channels[i] == NULL)
 			continue;
 		sc->channels[i]->io_want = sc->channels[i]->io_ready = 0;
 	}
 	/* Allocate 4x pollfd for each channel (rfd, wfd, efd, sock) */
 	if (sc->channels_alloc >= (INT_MAX / 4) - npfd_reserved)
 		fatal_f("too many channels"); /* shouldn't happen */
 	npfd += sc->channels_alloc * 4;
 	if (npfd > *npfd_allocp) {
 		*pfdp = xrecallocarray(*pfdp, *npfd_allocp,
 		    npfd, sizeof(**pfdp));
 		*npfd_allocp = npfd;
 	}
 	*npfd_activep = npfd_reserved;
 	oalloc = sc->channels_alloc;
 
 	channel_handler(ssh, CHAN_PRE, timeout);
 
 	if (oalloc != sc->channels_alloc) {
 		/* shouldn't happen */
 		fatal_f("channels_alloc changed during CHAN_PRE "
 		    "(was %u, now %u)", oalloc, sc->channels_alloc);
 	}
 
 	/* Prepare pollfd */
 	p = npfd_reserved;
 	for (i = 0; i < sc->channels_alloc; i++)
 		channel_prepare_pollfd(sc->channels[i], &p, *pfdp, npfd);
 	*npfd_activep = p;
 }
 
 static void
 fd_ready(Channel *c, int p, struct pollfd *pfds, u_int npfd, int fd,
     const char *what, u_int revents_mask, u_int ready)
 {
 	struct pollfd *pfd = &pfds[p];
 
 	if (fd == -1)
 		return;
 	if (p == -1 || (u_int)p >= npfd)
 		fatal_f("channel %d: bad pfd %d (max %u)", c->self, p, npfd);
 	dump_channel_poll(__func__, what, c, p, pfd);
 	if (pfd->fd != fd) {
 		fatal("channel %d: inconsistent %s fd=%d pollfd[%u].fd %d "
 		    "r%d w%d e%d s%d", c->self, what, fd, p, pfd->fd,
 		    c->rfd, c->wfd, c->efd, c->sock);
 	}
 	if ((pfd->revents & POLLNVAL) != 0) {
 		fatal("channel %d: invalid %s pollfd[%u].fd %d r%d w%d e%d s%d",
 		    c->self, what, p, pfd->fd, c->rfd, c->wfd, c->efd, c->sock);
 	}
 	if ((pfd->revents & (revents_mask|POLLHUP|POLLERR)) != 0)
 		c->io_ready |= ready & c->io_want;
 }
 
 /*
  * After poll, perform any appropriate operations for channels which have
  * events pending.
  */
 void
 channel_after_poll(struct ssh *ssh, struct pollfd *pfd, u_int npfd)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	u_int i;
 	int p;
 	Channel *c;
 
 #ifdef DEBUG_CHANNEL_POLL
 	for (p = 0; p < (int)npfd; p++) {
 		if (pfd[p].revents == 0)
 			continue;
 		debug_f("pfd[%u].fd %d rev 0x%04x",
 		    p, pfd[p].fd, pfd[p].revents);
 	}
 #endif
 
 	/* Convert pollfd into c->io_ready */
 	for (i = 0; i < sc->channels_alloc; i++) {
 		c = sc->channels[i];
 		if (c == NULL)
 			continue;
 		/* if rfd is shared with efd/sock then wfd should be too */
 		if (c->rfd != -1 && c->wfd != -1 && c->rfd != c->wfd &&
 		    (c->rfd == c->efd || c->rfd == c->sock)) {
 			/* Shouldn't happen */
 			fatal_f("channel %d: unexpected fds r%d w%d e%d s%d",
 			    c->self, c->rfd, c->wfd, c->efd, c->sock);
 		}
 		c->io_ready = 0;
 		/* rfd, potentially shared with wfd, efd and sock */
 		if (c->rfd != -1 && (p = c->pfds[0]) != -1) {
 			fd_ready(c, p, pfd, npfd, c->rfd,
 			    "rfd", POLLIN, SSH_CHAN_IO_RFD);
 			if (c->rfd == c->wfd) {
 				fd_ready(c, p, pfd, npfd, c->wfd,
 				    "wfd/r", POLLOUT, SSH_CHAN_IO_WFD);
 			}
 			if (c->rfd == c->efd) {
 				fd_ready(c, p, pfd, npfd, c->efd,
 				    "efdr/r", POLLIN, SSH_CHAN_IO_EFD_R);
 				fd_ready(c, p, pfd, npfd, c->efd,
 				    "efdw/r", POLLOUT, SSH_CHAN_IO_EFD_W);
 			}
 			if (c->rfd == c->sock) {
 				fd_ready(c, p, pfd, npfd, c->sock,
 				    "sockr/r", POLLIN, SSH_CHAN_IO_SOCK_R);
 				fd_ready(c, p, pfd, npfd, c->sock,
 				    "sockw/r", POLLOUT, SSH_CHAN_IO_SOCK_W);
 			}
 			dump_channel_poll(__func__, "rfd", c, p, pfd);
 		}
 		/* wfd */
 		if (c->wfd != -1 && c->wfd != c->rfd &&
 		    (p = c->pfds[1]) != -1) {
 			fd_ready(c, p, pfd, npfd, c->wfd,
 			    "wfd", POLLOUT, SSH_CHAN_IO_WFD);
 			dump_channel_poll(__func__, "wfd", c, p, pfd);
 		}
 		/* efd */
 		if (c->efd != -1 && c->efd != c->rfd &&
 		    (p = c->pfds[2]) != -1) {
 			fd_ready(c, p, pfd, npfd, c->efd,
 			    "efdr", POLLIN, SSH_CHAN_IO_EFD_R);
 			fd_ready(c, p, pfd, npfd, c->efd,
 			    "efdw", POLLOUT, SSH_CHAN_IO_EFD_W);
 			dump_channel_poll(__func__, "efd", c, p, pfd);
 		}
 		/* sock */
 		if (c->sock != -1 && c->sock != c->rfd &&
 		    (p = c->pfds[3]) != -1) {
 			fd_ready(c, p, pfd, npfd, c->sock,
 			    "sockr", POLLIN, SSH_CHAN_IO_SOCK_R);
 			fd_ready(c, p, pfd, npfd, c->sock,
 			    "sockw", POLLOUT, SSH_CHAN_IO_SOCK_W);
 			dump_channel_poll(__func__, "sock", c, p, pfd);
 		}
 	}
 	channel_handler(ssh, CHAN_POST, NULL);
 }
 
 /*
  * Enqueue data for channels with open or draining c->input.
  * Returns non-zero if a packet was enqueued.
  */
 static int
 channel_output_poll_input_open(struct ssh *ssh, Channel *c)
 {
 	size_t len, plen;
 	const u_char *pkt;
 	int r;
 
 	if ((len = sshbuf_len(c->input)) == 0) {
 		if (c->istate == CHAN_INPUT_WAIT_DRAIN) {
 			/*
 			 * input-buffer is empty and read-socket shutdown:
 			 * tell peer, that we will not send more data:
 			 * send IEOF.
 			 * hack for extended data: delay EOF if EFD still
 			 * in use.
 			 */
 			if (CHANNEL_EFD_INPUT_ACTIVE(c))
 				debug2("channel %d: "
 				    "ibuf_empty delayed efd %d/(%zu)",
 				    c->self, c->efd, sshbuf_len(c->extended));
 			else
 				chan_ibuf_empty(ssh, c);
 		}
 		return 0;
 	}
 
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote id", c->self);
 
 	if (c->datagram) {
 		/* Check datagram will fit; drop if not */
 		if ((r = sshbuf_get_string_direct(c->input, &pkt, &plen)) != 0)
 			fatal_fr(r, "channel %i: get datagram", c->self);
 		/*
 		 * XXX this does tail-drop on the datagram queue which is
 		 * usually suboptimal compared to head-drop. Better to have
 		 * backpressure at read time? (i.e. read + discard)
 		 */
 		if (plen > c->remote_window || plen > c->remote_maxpacket) {
 			debug("channel %d: datagram too big", c->self);
 			return 0;
 		}
 		/* Enqueue it */
 		if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_DATA)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 		    (r = sshpkt_put_string(ssh, pkt, plen)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "channel %i: send datagram", c->self);
 		c->remote_window -= plen;
 		return 1;
 	}
 
 	/* Enqueue packet for buffered data. */
 	if (len > c->remote_window)
 		len = c->remote_window;
 	if (len > c->remote_maxpacket)
 		len = c->remote_maxpacket;
 	if (len == 0)
 		return 0;
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_DATA)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_string(ssh, sshbuf_ptr(c->input), len)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i: send data", c->self);
 	if ((r = sshbuf_consume(c->input, len)) != 0)
 		fatal_fr(r, "channel %i: consume", c->self);
 	c->remote_window -= len;
 	return 1;
 }
 
 /*
  * Enqueue data for channels with open c->extended in read mode.
  * Returns non-zero if a packet was enqueued.
  */
 static int
 channel_output_poll_extended_read(struct ssh *ssh, Channel *c)
 {
 	size_t len;
 	int r;
 
 	if ((len = sshbuf_len(c->extended)) == 0)
 		return 0;
 
 	debug2("channel %d: rwin %u elen %zu euse %d", c->self,
 	    c->remote_window, sshbuf_len(c->extended), c->extended_usage);
 	if (len > c->remote_window)
 		len = c->remote_window;
 	if (len > c->remote_maxpacket)
 		len = c->remote_maxpacket;
 	if (len == 0)
 		return 0;
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote id", c->self);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_EXTENDED_DATA)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, SSH2_EXTENDED_DATA_STDERR)) != 0 ||
 	    (r = sshpkt_put_string(ssh, sshbuf_ptr(c->extended), len)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "channel %i: data", c->self);
 	if ((r = sshbuf_consume(c->extended, len)) != 0)
 		fatal_fr(r, "channel %i: consume", c->self);
 	c->remote_window -= len;
 	debug2("channel %d: sent ext data %zu", c->self, len);
 	return 1;
 }
 
 /*
  * If there is data to send to the connection, enqueue some of it now.
  * Returns non-zero if data was enqueued.
  */
 int
 channel_output_poll(struct ssh *ssh)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	Channel *c;
 	u_int i;
 	int ret = 0;
 
 	for (i = 0; i < sc->channels_alloc; i++) {
 		c = sc->channels[i];
 		if (c == NULL)
 			continue;
 
 		/*
 		 * We are only interested in channels that can have buffered
 		 * incoming data.
 		 */
 		if (c->type != SSH_CHANNEL_OPEN)
 			continue;
 		if ((c->flags & (CHAN_CLOSE_SENT|CHAN_CLOSE_RCVD))) {
 			/* XXX is this true? */
 			debug3("channel %d: will not send data after close",
 			    c->self);
 			continue;
 		}
 
 		/* Get the amount of buffered data for this channel. */
 		if (c->istate == CHAN_INPUT_OPEN ||
 		    c->istate == CHAN_INPUT_WAIT_DRAIN)
 			ret |= channel_output_poll_input_open(ssh, c);
 		/* Send extended data, i.e. stderr */
 		if (!(c->flags & CHAN_EOF_SENT) &&
 		    c->extended_usage == CHAN_EXTENDED_READ)
 			ret |= channel_output_poll_extended_read(ssh, c);
 	}
 	return ret;
 }
 
 /* -- mux proxy support  */
 
 /*
  * When multiplexing channel messages for mux clients we have to deal
  * with downstream messages from the mux client and upstream messages
  * from the ssh server:
  * 1) Handling downstream messages is straightforward and happens
  *    in channel_proxy_downstream():
  *    - We forward all messages (mostly) unmodified to the server.
  *    - However, in order to route messages from upstream to the correct
  *      downstream client, we have to replace the channel IDs used by the
  *      mux clients with a unique channel ID because the mux clients might
  *      use conflicting channel IDs.
  *    - so we inspect and change both SSH2_MSG_CHANNEL_OPEN and
  *      SSH2_MSG_CHANNEL_OPEN_CONFIRMATION messages, create a local
  *      SSH_CHANNEL_MUX_PROXY channel and replace the mux clients ID
  *      with the newly allocated channel ID.
  * 2) Upstream messages are received by matching SSH_CHANNEL_MUX_PROXY
  *    channels and processed by channel_proxy_upstream(). The local channel ID
  *    is then translated back to the original mux client ID.
  * 3) In both cases we need to keep track of matching SSH2_MSG_CHANNEL_CLOSE
  *    messages so we can clean up SSH_CHANNEL_MUX_PROXY channels.
  * 4) The SSH_CHANNEL_MUX_PROXY channels also need to closed when the
  *    downstream mux client are removed.
  * 5) Handling SSH2_MSG_CHANNEL_OPEN messages from the upstream server
  *    requires more work, because they are not addressed to a specific
  *    channel. E.g. client_request_forwarded_tcpip() needs to figure
  *    out whether the request is addressed to the local client or a
  *    specific downstream client based on the listen-address/port.
  * 6) Agent and X11-Forwarding have a similar problem and are currently
  *    not supported as the matching session/channel cannot be identified
  *    easily.
  */
 
 /*
  * receive packets from downstream mux clients:
  * channel callback fired on read from mux client, creates
  * SSH_CHANNEL_MUX_PROXY channels and translates channel IDs
  * on channel creation.
  */
 int
 channel_proxy_downstream(struct ssh *ssh, Channel *downstream)
 {
 	Channel *c = NULL;
 	struct sshbuf *original = NULL, *modified = NULL;
 	const u_char *cp;
 	char *ctype = NULL, *listen_host = NULL;
 	u_char type;
 	size_t have;
 	int ret = -1, r;
 	u_int id, remote_id, listen_port;
 
 	/* sshbuf_dump(downstream->input, stderr); */
 	if ((r = sshbuf_get_string_direct(downstream->input, &cp, &have))
 	    != 0) {
 		error_fr(r, "parse");
 		return -1;
 	}
 	if (have < 2) {
 		error_f("short message");
 		return -1;
 	}
 	type = cp[1];
 	/* skip padlen + type */
 	cp += 2;
 	have -= 2;
 	if (ssh_packet_log_type(type))
 		debug3_f("channel %u: down->up: type %u",
 		    downstream->self, type);
 
 	switch (type) {
 	case SSH2_MSG_CHANNEL_OPEN:
 		if ((original = sshbuf_from(cp, have)) == NULL ||
 		    (modified = sshbuf_new()) == NULL) {
 			error_f("alloc");
 			goto out;
 		}
 		if ((r = sshbuf_get_cstring(original, &ctype, NULL)) != 0 ||
 		    (r = sshbuf_get_u32(original, &id)) != 0) {
 			error_fr(r, "parse");
 			goto out;
 		}
 		c = channel_new(ssh, "mux-proxy", SSH_CHANNEL_MUX_PROXY,
 		    -1, -1, -1, 0, 0, 0, ctype, 1);
 		c->mux_ctx = downstream;	/* point to mux client */
 		c->mux_downstream_id = id;	/* original downstream id */
 		if ((r = sshbuf_put_cstring(modified, ctype)) != 0 ||
 		    (r = sshbuf_put_u32(modified, c->self)) != 0 ||
 		    (r = sshbuf_putb(modified, original)) != 0) {
 			error_fr(r, "compose");
 			channel_free(ssh, c);
 			goto out;
 		}
 		break;
 	case SSH2_MSG_CHANNEL_OPEN_CONFIRMATION:
 		/*
 		 * Almost the same as SSH2_MSG_CHANNEL_OPEN, except then we
 		 * need to parse 'remote_id' instead of 'ctype'.
 		 */
 		if ((original = sshbuf_from(cp, have)) == NULL ||
 		    (modified = sshbuf_new()) == NULL) {
 			error_f("alloc");
 			goto out;
 		}
 		if ((r = sshbuf_get_u32(original, &remote_id)) != 0 ||
 		    (r = sshbuf_get_u32(original, &id)) != 0) {
 			error_fr(r, "parse");
 			goto out;
 		}
 		c = channel_new(ssh, "mux-proxy", SSH_CHANNEL_MUX_PROXY,
 		    -1, -1, -1, 0, 0, 0, "mux-down-connect", 1);
 		c->mux_ctx = downstream;	/* point to mux client */
 		c->mux_downstream_id = id;
 		c->remote_id = remote_id;
 		c->have_remote_id = 1;
 		if ((r = sshbuf_put_u32(modified, remote_id)) != 0 ||
 		    (r = sshbuf_put_u32(modified, c->self)) != 0 ||
 		    (r = sshbuf_putb(modified, original)) != 0) {
 			error_fr(r, "compose");
 			channel_free(ssh, c);
 			goto out;
 		}
 		break;
 	case SSH2_MSG_GLOBAL_REQUEST:
 		if ((original = sshbuf_from(cp, have)) == NULL) {
 			error_f("alloc");
 			goto out;
 		}
 		if ((r = sshbuf_get_cstring(original, &ctype, NULL)) != 0) {
 			error_fr(r, "parse");
 			goto out;
 		}
 		if (strcmp(ctype, "tcpip-forward") != 0) {
 			error_f("unsupported request %s", ctype);
 			goto out;
 		}
 		if ((r = sshbuf_get_u8(original, NULL)) != 0 ||
 		    (r = sshbuf_get_cstring(original, &listen_host, NULL)) != 0 ||
 		    (r = sshbuf_get_u32(original, &listen_port)) != 0) {
 			error_fr(r, "parse");
 			goto out;
 		}
 		if (listen_port > 65535) {
 			error_f("tcpip-forward for %s: bad port %u",
 			    listen_host, listen_port);
 			goto out;
 		}
 		/* Record that connection to this host/port is permitted. */
-		permission_set_add(ssh, FORWARD_USER, FORWARD_LOCAL, "<mux>", -1,
-		    listen_host, NULL, (int)listen_port, downstream);
-		listen_host = NULL;
+		permission_set_add(ssh, FORWARD_USER, FORWARD_LOCAL, "<mux>",
+		    -1, listen_host, NULL, (int)listen_port, downstream);
 		break;
 	case SSH2_MSG_CHANNEL_CLOSE:
 		if (have < 4)
 			break;
 		remote_id = PEEK_U32(cp);
 		if ((c = channel_by_remote_id(ssh, remote_id)) != NULL) {
 			if (c->flags & CHAN_CLOSE_RCVD)
 				channel_free(ssh, c);
 			else
 				c->flags |= CHAN_CLOSE_SENT;
 		}
 		break;
 	}
 	if (modified) {
 		if ((r = sshpkt_start(ssh, type)) != 0 ||
 		    (r = sshpkt_putb(ssh, modified)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0) {
 			error_fr(r, "send");
 			goto out;
 		}
 	} else {
 		if ((r = sshpkt_start(ssh, type)) != 0 ||
 		    (r = sshpkt_put(ssh, cp, have)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0) {
 			error_fr(r, "send");
 			goto out;
 		}
 	}
 	ret = 0;
  out:
 	free(ctype);
 	free(listen_host);
 	sshbuf_free(original);
 	sshbuf_free(modified);
 	return ret;
 }
 
 /*
  * receive packets from upstream server and de-multiplex packets
  * to correct downstream:
  * implemented as a helper for channel input handlers,
  * replaces local (proxy) channel ID with downstream channel ID.
  */
 int
 channel_proxy_upstream(Channel *c, int type, u_int32_t seq, struct ssh *ssh)
 {
 	struct sshbuf *b = NULL;
 	Channel *downstream;
 	const u_char *cp = NULL;
 	size_t len;
 	int r;
 
 	/*
 	 * When receiving packets from the peer we need to check whether we
 	 * need to forward the packets to the mux client. In this case we
 	 * restore the original channel id and keep track of CLOSE messages,
 	 * so we can cleanup the channel.
 	 */
 	if (c == NULL || c->type != SSH_CHANNEL_MUX_PROXY)
 		return 0;
 	if ((downstream = c->mux_ctx) == NULL)
 		return 0;
 	switch (type) {
 	case SSH2_MSG_CHANNEL_CLOSE:
 	case SSH2_MSG_CHANNEL_DATA:
 	case SSH2_MSG_CHANNEL_EOF:
 	case SSH2_MSG_CHANNEL_EXTENDED_DATA:
 	case SSH2_MSG_CHANNEL_OPEN_CONFIRMATION:
 	case SSH2_MSG_CHANNEL_OPEN_FAILURE:
 	case SSH2_MSG_CHANNEL_WINDOW_ADJUST:
 	case SSH2_MSG_CHANNEL_SUCCESS:
 	case SSH2_MSG_CHANNEL_FAILURE:
 	case SSH2_MSG_CHANNEL_REQUEST:
 		break;
 	default:
 		debug2_f("channel %u: unsupported type %u", c->self, type);
 		return 0;
 	}
 	if ((b = sshbuf_new()) == NULL) {
 		error_f("alloc reply");
 		goto out;
 	}
 	/* get remaining payload (after id) */
 	cp = sshpkt_ptr(ssh, &len);
 	if (cp == NULL) {
 		error_f("no packet");
 		goto out;
 	}
 	/* translate id and send to muxclient */
 	if ((r = sshbuf_put_u8(b, 0)) != 0 ||	/* padlen */
 	    (r = sshbuf_put_u8(b, type)) != 0 ||
 	    (r = sshbuf_put_u32(b, c->mux_downstream_id)) != 0 ||
 	    (r = sshbuf_put(b, cp, len)) != 0 ||
 	    (r = sshbuf_put_stringb(downstream->output, b)) != 0) {
 		error_fr(r, "compose muxclient");
 		goto out;
 	}
 	/* sshbuf_dump(b, stderr); */
 	if (ssh_packet_log_type(type))
 		debug3_f("channel %u: up->down: type %u", c->self, type);
  out:
 	/* update state */
 	switch (type) {
 	case SSH2_MSG_CHANNEL_OPEN_CONFIRMATION:
 		/* record remote_id for SSH2_MSG_CHANNEL_CLOSE */
 		if (cp && len > 4) {
 			c->remote_id = PEEK_U32(cp);
 			c->have_remote_id = 1;
 		}
 		break;
 	case SSH2_MSG_CHANNEL_CLOSE:
 		if (c->flags & CHAN_CLOSE_SENT)
 			channel_free(ssh, c);
 		else
 			c->flags |= CHAN_CLOSE_RCVD;
 		break;
 	}
 	sshbuf_free(b);
 	return 1;
 }
 
 /* -- protocol input */
 
 /* Parse a channel ID from the current packet */
 static int
 channel_parse_id(struct ssh *ssh, const char *where, const char *what)
 {
 	u_int32_t id;
 	int r;
 
 	if ((r = sshpkt_get_u32(ssh, &id)) != 0) {
 		error_r(r, "%s: parse id", where);
 		ssh_packet_disconnect(ssh, "Invalid %s message", what);
 	}
 	if (id > INT_MAX) {
 		error_r(r, "%s: bad channel id %u", where, id);
 		ssh_packet_disconnect(ssh, "Invalid %s channel id", what);
 	}
 	return (int)id;
 }
 
 /* Lookup a channel from an ID in the current packet */
 static Channel *
 channel_from_packet_id(struct ssh *ssh, const char *where, const char *what)
 {
 	int id = channel_parse_id(ssh, where, what);
 	Channel *c;
 
 	if ((c = channel_lookup(ssh, id)) == NULL) {
 		ssh_packet_disconnect(ssh,
 		    "%s packet referred to nonexistent channel %d", what, id);
 	}
 	return c;
 }
 
 int
 channel_input_data(int type, u_int32_t seq, struct ssh *ssh)
 {
 	const u_char *data;
 	size_t data_len, win_len;
 	Channel *c = channel_from_packet_id(ssh, __func__, "data");
 	int r;
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 
 	/* Ignore any data for non-open channels (might happen on close) */
 	if (c->type != SSH_CHANNEL_OPEN &&
 	    c->type != SSH_CHANNEL_RDYNAMIC_OPEN &&
 	    c->type != SSH_CHANNEL_RDYNAMIC_FINISH &&
 	    c->type != SSH_CHANNEL_X11_OPEN)
 		return 0;
 
 	/* Get the data. */
 	if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0 ||
             (r = sshpkt_get_end(ssh)) != 0)
 		fatal_fr(r, "channel %i: get data", c->self);
 
 	win_len = data_len;
 	if (c->datagram)
 		win_len += 4;  /* string length header */
 
 	/*
 	 * The sending side reduces its window as it sends data, so we
 	 * must 'fake' consumption of the data in order to ensure that window
 	 * updates are sent back. Otherwise the connection might deadlock.
 	 */
 	if (c->ostate != CHAN_OUTPUT_OPEN) {
 		c->local_window -= win_len;
 		c->local_consumed += win_len;
 		return 0;
 	}
 
 	if (win_len > c->local_maxpacket) {
 		logit("channel %d: rcvd big packet %zu, maxpack %u",
 		    c->self, win_len, c->local_maxpacket);
 		return 0;
 	}
 	if (win_len > c->local_window) {
 		c->local_window_exceeded += win_len - c->local_window;
 		logit("channel %d: rcvd too much data %zu, win %u/%u "
 		    "(excess %u)", c->self, win_len, c->local_window,
 		    c->local_window_max, c->local_window_exceeded);
 		c->local_window = 0;
 		/* Allow 10% grace before bringing the hammer down */
 		if (c->local_window_exceeded > (c->local_window_max / 10)) {
 			ssh_packet_disconnect(ssh, "channel %d: peer ignored "
 			    "channel window", c->self);
 		}
 	} else {
 		c->local_window -= win_len;
 		c->local_window_exceeded = 0;
 	}
 
 	if (c->datagram) {
 		if ((r = sshbuf_put_string(c->output, data, data_len)) != 0)
 			fatal_fr(r, "channel %i: append datagram", c->self);
 	} else if ((r = sshbuf_put(c->output, data, data_len)) != 0)
 		fatal_fr(r, "channel %i: append data", c->self);
 
 	return 0;
 }
 
 int
 channel_input_extended_data(int type, u_int32_t seq, struct ssh *ssh)
 {
 	const u_char *data;
 	size_t data_len;
 	u_int32_t tcode;
 	Channel *c = channel_from_packet_id(ssh, __func__, "extended data");
 	int r;
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	if (c->type != SSH_CHANNEL_OPEN) {
 		logit("channel %d: ext data for non open", c->self);
 		return 0;
 	}
 	if (c->flags & CHAN_EOF_RCVD) {
 		if (ssh->compat & SSH_BUG_EXTEOF)
 			debug("channel %d: accepting ext data after eof",
 			    c->self);
 		else
 			ssh_packet_disconnect(ssh, "Received extended_data "
 			    "after EOF on channel %d.", c->self);
 	}
 
 	if ((r = sshpkt_get_u32(ssh, &tcode)) != 0) {
 		error_fr(r, "parse tcode");
 		ssh_packet_disconnect(ssh, "Invalid extended_data message");
 	}
 	if (c->efd == -1 ||
 	    c->extended_usage != CHAN_EXTENDED_WRITE ||
 	    tcode != SSH2_EXTENDED_DATA_STDERR) {
 		logit("channel %d: bad ext data", c->self);
 		return 0;
 	}
 	if ((r = sshpkt_get_string_direct(ssh, &data, &data_len)) != 0 ||
             (r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse data");
 		ssh_packet_disconnect(ssh, "Invalid extended_data message");
 	}
 
 	if (data_len > c->local_window) {
 		logit("channel %d: rcvd too much extended_data %zu, win %u",
 		    c->self, data_len, c->local_window);
 		return 0;
 	}
 	debug2("channel %d: rcvd ext data %zu", c->self, data_len);
 	/* XXX sshpkt_getb? */
 	if ((r = sshbuf_put(c->extended, data, data_len)) != 0)
 		error_fr(r, "append");
 	c->local_window -= data_len;
 	return 0;
 }
 
 int
 channel_input_ieof(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = channel_from_packet_id(ssh, __func__, "ieof");
 	int r;
 
         if ((r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse data");
 		ssh_packet_disconnect(ssh, "Invalid ieof message");
 	}
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	chan_rcvd_ieof(ssh, c);
 
 	/* XXX force input close */
 	if (c->force_drain && c->istate == CHAN_INPUT_OPEN) {
 		debug("channel %d: FORCE input drain", c->self);
 		c->istate = CHAN_INPUT_WAIT_DRAIN;
 		if (sshbuf_len(c->input) == 0)
 			chan_ibuf_empty(ssh, c);
 	}
 	return 0;
 }
 
 int
 channel_input_oclose(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = channel_from_packet_id(ssh, __func__, "oclose");
 	int r;
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
         if ((r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse data");
 		ssh_packet_disconnect(ssh, "Invalid oclose message");
 	}
 	chan_rcvd_oclose(ssh, c);
 	return 0;
 }
 
 int
 channel_input_open_confirmation(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = channel_from_packet_id(ssh, __func__, "open confirmation");
 	u_int32_t remote_window, remote_maxpacket;
 	int r;
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	if (c->type != SSH_CHANNEL_OPENING)
 		ssh_packet_disconnect(ssh, "Received open confirmation for "
 		    "non-opening channel %d.", c->self);
 	/*
 	 * Record the remote channel number and mark that the channel
 	 * is now open.
 	 */
 	if ((r = sshpkt_get_u32(ssh, &c->remote_id)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &remote_window)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &remote_maxpacket)) != 0 ||
             (r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "window/maxpacket");
 		ssh_packet_disconnect(ssh, "Invalid open confirmation message");
 	}
 
 	c->have_remote_id = 1;
 	c->remote_window = remote_window;
 	c->remote_maxpacket = remote_maxpacket;
 	c->type = SSH_CHANNEL_OPEN;
 	if (c->open_confirm) {
 		debug2_f("channel %d: callback start", c->self);
 		c->open_confirm(ssh, c->self, 1, c->open_confirm_ctx);
 		debug2_f("channel %d: callback done", c->self);
 	}
-	c->lastused = monotime();
+	channel_set_used_time(ssh, c);
 	debug2("channel %d: open confirm rwindow %u rmax %u", c->self,
 	    c->remote_window, c->remote_maxpacket);
 	return 0;
 }
 
 static char *
 reason2txt(int reason)
 {
 	switch (reason) {
 	case SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED:
 		return "administratively prohibited";
 	case SSH2_OPEN_CONNECT_FAILED:
 		return "connect failed";
 	case SSH2_OPEN_UNKNOWN_CHANNEL_TYPE:
 		return "unknown channel type";
 	case SSH2_OPEN_RESOURCE_SHORTAGE:
 		return "resource shortage";
 	}
 	return "unknown reason";
 }
 
 int
 channel_input_open_failure(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = channel_from_packet_id(ssh, __func__, "open failure");
 	u_int32_t reason;
 	char *msg = NULL;
 	int r;
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	if (c->type != SSH_CHANNEL_OPENING)
 		ssh_packet_disconnect(ssh, "Received open failure for "
 		    "non-opening channel %d.", c->self);
 	if ((r = sshpkt_get_u32(ssh, &reason)) != 0) {
 		error_fr(r, "parse reason");
 		ssh_packet_disconnect(ssh, "Invalid open failure message");
 	}
 	/* skip language */
 	if ((r = sshpkt_get_cstring(ssh, &msg, NULL)) != 0 ||
 	    (r = sshpkt_get_string_direct(ssh, NULL, NULL)) != 0 ||
             (r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse msg/lang");
 		ssh_packet_disconnect(ssh, "Invalid open failure message");
 	}
 	logit("channel %d: open failed: %s%s%s", c->self,
 	    reason2txt(reason), msg ? ": ": "", msg ? msg : "");
 	free(msg);
 	if (c->open_confirm) {
 		debug2_f("channel %d: callback start", c->self);
 		c->open_confirm(ssh, c->self, 0, c->open_confirm_ctx);
 		debug2_f("channel %d: callback done", c->self);
 	}
 	/* Schedule the channel for cleanup/deletion. */
 	chan_mark_dead(ssh, c);
 	return 0;
 }
 
 int
 channel_input_window_adjust(int type, u_int32_t seq, struct ssh *ssh)
 {
 	int id = channel_parse_id(ssh, __func__, "window adjust");
 	Channel *c;
 	u_int32_t adjust;
 	u_int new_rwin;
 	int r;
 
 	if ((c = channel_lookup(ssh, id)) == NULL) {
 		logit("Received window adjust for non-open channel %d.", id);
 		return 0;
 	}
 
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	if ((r = sshpkt_get_u32(ssh, &adjust)) != 0 ||
             (r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse adjust");
 		ssh_packet_disconnect(ssh, "Invalid window adjust message");
 	}
 	debug2("channel %d: rcvd adjust %u", c->self, adjust);
 	if ((new_rwin = c->remote_window + adjust) < c->remote_window) {
 		fatal("channel %d: adjust %u overflows remote window %u",
 		    c->self, adjust, c->remote_window);
 	}
 	c->remote_window = new_rwin;
 	return 0;
 }
 
 int
 channel_input_status_confirm(int type, u_int32_t seq, struct ssh *ssh)
 {
 	int id = channel_parse_id(ssh, __func__, "status confirm");
 	Channel *c;
 	struct channel_confirm *cc;
 
 	/* Reset keepalive timeout */
 	ssh_packet_set_alive_timeouts(ssh, 0);
 
 	debug2_f("type %d id %d", type, id);
 
 	if ((c = channel_lookup(ssh, id)) == NULL) {
 		logit_f("%d: unknown", id);
 		return 0;
 	}
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
         if (sshpkt_get_end(ssh) != 0)
 		ssh_packet_disconnect(ssh, "Invalid status confirm message");
 	if ((cc = TAILQ_FIRST(&c->status_confirms)) == NULL)
 		return 0;
 	cc->cb(ssh, type, c, cc->ctx);
 	TAILQ_REMOVE(&c->status_confirms, cc, entry);
 	freezero(cc, sizeof(*cc));
 	return 0;
 }
 
 /* -- tcp forwarding */
 
 void
 channel_set_af(struct ssh *ssh, int af)
 {
 	ssh->chanctxt->IPv4or6 = af;
 }
 
 
 /*
  * Determine whether or not a port forward listens to loopback, the
  * specified address or wildcard. On the client, a specified bind
  * address will always override gateway_ports. On the server, a
  * gateway_ports of 1 (``yes'') will override the client's specification
  * and force a wildcard bind, whereas a value of 2 (``clientspecified'')
  * will bind to whatever address the client asked for.
  *
  * Special-case listen_addrs are:
  *
  * "0.0.0.0"               -> wildcard v4/v6 if SSH_OLD_FORWARD_ADDR
  * "" (empty string), "*"  -> wildcard v4/v6
  * "localhost"             -> loopback v4/v6
  * "127.0.0.1" / "::1"     -> accepted even if gateway_ports isn't set
  */
 static const char *
 channel_fwd_bind_addr(struct ssh *ssh, const char *listen_addr, int *wildcardp,
     int is_client, struct ForwardOptions *fwd_opts)
 {
 	const char *addr = NULL;
 	int wildcard = 0;
 
 	if (listen_addr == NULL) {
 		/* No address specified: default to gateway_ports setting */
 		if (fwd_opts->gateway_ports)
 			wildcard = 1;
 	} else if (fwd_opts->gateway_ports || is_client) {
 		if (((ssh->compat & SSH_OLD_FORWARD_ADDR) &&
 		    strcmp(listen_addr, "0.0.0.0") == 0 && is_client == 0) ||
 		    *listen_addr == '\0' || strcmp(listen_addr, "*") == 0 ||
 		    (!is_client && fwd_opts->gateway_ports == 1)) {
 			wildcard = 1;
 			/*
 			 * Notify client if they requested a specific listen
 			 * address and it was overridden.
 			 */
 			if (*listen_addr != '\0' &&
 			    strcmp(listen_addr, "0.0.0.0") != 0 &&
 			    strcmp(listen_addr, "*") != 0) {
 				ssh_packet_send_debug(ssh,
 				    "Forwarding listen address "
 				    "\"%s\" overridden by server "
 				    "GatewayPorts", listen_addr);
 			}
 		} else if (strcmp(listen_addr, "localhost") != 0 ||
 		    strcmp(listen_addr, "127.0.0.1") == 0 ||
 		    strcmp(listen_addr, "::1") == 0) {
 			/*
 			 * Accept explicit localhost address when
 			 * GatewayPorts=yes. The "localhost" hostname is
 			 * deliberately skipped here so it will listen on all
 			 * available local address families.
 			 */
 			addr = listen_addr;
 		}
 	} else if (strcmp(listen_addr, "127.0.0.1") == 0 ||
 	    strcmp(listen_addr, "::1") == 0) {
 		/*
 		 * If a specific IPv4/IPv6 localhost address has been
 		 * requested then accept it even if gateway_ports is in
 		 * effect. This allows the client to prefer IPv4 or IPv6.
 		 */
 		addr = listen_addr;
 	}
 	if (wildcardp != NULL)
 		*wildcardp = wildcard;
 	return addr;
 }
 
 static int
 channel_setup_fwd_listener_tcpip(struct ssh *ssh, int type,
     struct Forward *fwd, int *allocated_listen_port,
     struct ForwardOptions *fwd_opts)
 {
 	Channel *c;
 	int sock, r, success = 0, wildcard = 0, is_client;
 	struct addrinfo hints, *ai, *aitop;
 	const char *host, *addr;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
 	in_port_t *lport_p;
 
 	is_client = (type == SSH_CHANNEL_PORT_LISTENER);
 
 	if (is_client && fwd->connect_path != NULL) {
 		host = fwd->connect_path;
 	} else {
 		host = (type == SSH_CHANNEL_RPORT_LISTENER) ?
 		    fwd->listen_host : fwd->connect_host;
 		if (host == NULL) {
 			error("No forward host name.");
 			return 0;
 		}
 		if (strlen(host) >= NI_MAXHOST) {
 			error("Forward host name too long.");
 			return 0;
 		}
 	}
 
 	/* Determine the bind address, cf. channel_fwd_bind_addr() comment */
 	addr = channel_fwd_bind_addr(ssh, fwd->listen_host, &wildcard,
 	    is_client, fwd_opts);
 	debug3_f("type %d wildcard %d addr %s", type, wildcard,
 	    (addr == NULL) ? "NULL" : addr);
 
 	/*
 	 * getaddrinfo returns a loopback address if the hostname is
 	 * set to NULL and hints.ai_flags is not AI_PASSIVE
 	 */
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = ssh->chanctxt->IPv4or6;
 	hints.ai_flags = wildcard ? AI_PASSIVE : 0;
 	hints.ai_socktype = SOCK_STREAM;
 	snprintf(strport, sizeof strport, "%d", fwd->listen_port);
 	if ((r = getaddrinfo(addr, strport, &hints, &aitop)) != 0) {
 		if (addr == NULL) {
 			/* This really shouldn't happen */
 			ssh_packet_disconnect(ssh, "getaddrinfo: fatal error: %s",
 			    ssh_gai_strerror(r));
 		} else {
 			error_f("getaddrinfo(%.64s): %s", addr,
 			    ssh_gai_strerror(r));
 		}
 		return 0;
 	}
 	if (allocated_listen_port != NULL)
 		*allocated_listen_port = 0;
 	for (ai = aitop; ai; ai = ai->ai_next) {
 		switch (ai->ai_family) {
 		case AF_INET:
 			lport_p = &((struct sockaddr_in *)ai->ai_addr)->
 			    sin_port;
 			break;
 		case AF_INET6:
 			lport_p = &((struct sockaddr_in6 *)ai->ai_addr)->
 			    sin6_port;
 			break;
 		default:
 			continue;
 		}
 		/*
 		 * If allocating a port for -R forwards, then use the
 		 * same port for all address families.
 		 */
 		if (type == SSH_CHANNEL_RPORT_LISTENER &&
 		    fwd->listen_port == 0 && allocated_listen_port != NULL &&
 		    *allocated_listen_port > 0)
 			*lport_p = htons(*allocated_listen_port);
 
 		if (getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop, sizeof(ntop),
 		    strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
 			error_f("getnameinfo failed");
 			continue;
 		}
 		/* Create a port to listen for the host. */
 		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (sock == -1) {
 			/* this is no error since kernel may not support ipv6 */
 			verbose("socket [%s]:%s: %.100s", ntop, strport,
 			    strerror(errno));
 			continue;
 		}
 
 		set_reuseaddr(sock);
 		if (ai->ai_family == AF_INET6)
 			sock_set_v6only(sock);
 
 		debug("Local forwarding listening on %s port %s.",
 		    ntop, strport);
 
 		/* Bind the socket to the address. */
 		if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) {
 			/*
 			 * address can be in if use ipv6 address is
 			 * already bound
 			 */
 			if (!ai->ai_next)
 				error("bind [%s]:%s: %.100s",
 				    ntop, strport, strerror(errno));
 			else
 				verbose("bind [%s]:%s: %.100s",
 				    ntop, strport, strerror(errno));
 
 			close(sock);
 			continue;
 		}
 		/* Start listening for connections on the socket. */
 		if (listen(sock, SSH_LISTEN_BACKLOG) == -1) {
 			error("listen [%s]:%s: %.100s", ntop, strport,
 			    strerror(errno));
 			close(sock);
 			continue;
 		}
 
 		/*
 		 * fwd->listen_port == 0 requests a dynamically allocated port -
 		 * record what we got.
 		 */
 		if (type == SSH_CHANNEL_RPORT_LISTENER &&
 		    fwd->listen_port == 0 &&
 		    allocated_listen_port != NULL &&
 		    *allocated_listen_port == 0) {
 			*allocated_listen_port = get_local_port(sock);
 			debug("Allocated listen port %d",
 			    *allocated_listen_port);
 		}
 
 		/* Allocate a channel number for the socket. */
 		c = channel_new(ssh, "port-listener", type, sock, sock, -1,
 		    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
 		    0, "port listener", 1);
 		c->path = xstrdup(host);
 		c->host_port = fwd->connect_port;
 		c->listening_addr = addr == NULL ? NULL : xstrdup(addr);
 		if (fwd->listen_port == 0 && allocated_listen_port != NULL &&
 		    !(ssh->compat & SSH_BUG_DYNAMIC_RPORT))
 			c->listening_port = *allocated_listen_port;
 		else
 			c->listening_port = fwd->listen_port;
 		success = 1;
 	}
 	if (success == 0)
 		error_f("cannot listen to port: %d", fwd->listen_port);
 	freeaddrinfo(aitop);
 	return success;
 }
 
 static int
 channel_setup_fwd_listener_streamlocal(struct ssh *ssh, int type,
     struct Forward *fwd, struct ForwardOptions *fwd_opts)
 {
 	struct sockaddr_un sunaddr;
 	const char *path;
 	Channel *c;
 	int port, sock;
 	mode_t omask;
 
 	switch (type) {
 	case SSH_CHANNEL_UNIX_LISTENER:
 		if (fwd->connect_path != NULL) {
 			if (strlen(fwd->connect_path) > sizeof(sunaddr.sun_path)) {
 				error("Local connecting path too long: %s",
 				    fwd->connect_path);
 				return 0;
 			}
 			path = fwd->connect_path;
 			port = PORT_STREAMLOCAL;
 		} else {
 			if (fwd->connect_host == NULL) {
 				error("No forward host name.");
 				return 0;
 			}
 			if (strlen(fwd->connect_host) >= NI_MAXHOST) {
 				error("Forward host name too long.");
 				return 0;
 			}
 			path = fwd->connect_host;
 			port = fwd->connect_port;
 		}
 		break;
 	case SSH_CHANNEL_RUNIX_LISTENER:
 		path = fwd->listen_path;
 		port = PORT_STREAMLOCAL;
 		break;
 	default:
 		error_f("unexpected channel type %d", type);
 		return 0;
 	}
 
 	if (fwd->listen_path == NULL) {
 		error("No forward path name.");
 		return 0;
 	}
 	if (strlen(fwd->listen_path) > sizeof(sunaddr.sun_path)) {
 		error("Local listening path too long: %s", fwd->listen_path);
 		return 0;
 	}
 
 	debug3_f("type %d path %s", type, fwd->listen_path);
 
 	/* Start a Unix domain listener. */
 	omask = umask(fwd_opts->streamlocal_bind_mask);
 	sock = unix_listener(fwd->listen_path, SSH_LISTEN_BACKLOG,
 	    fwd_opts->streamlocal_bind_unlink);
 	umask(omask);
 	if (sock < 0)
 		return 0;
 
 	debug("Local forwarding listening on path %s.", fwd->listen_path);
 
 	/* Allocate a channel number for the socket. */
 	c = channel_new(ssh, "unix-listener", type, sock, sock, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
 	    0, "unix listener", 1);
 	c->path = xstrdup(path);
 	c->host_port = port;
 	c->listening_port = PORT_STREAMLOCAL;
 	c->listening_addr = xstrdup(fwd->listen_path);
 	return 1;
 }
 
 static int
 channel_cancel_rport_listener_tcpip(struct ssh *ssh,
     const char *host, u_short port)
 {
 	u_int i;
 	int found = 0;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		Channel *c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_RPORT_LISTENER)
 			continue;
 		if (strcmp(c->path, host) == 0 && c->listening_port == port) {
 			debug2_f("close channel %d", i);
 			channel_free(ssh, c);
 			found = 1;
 		}
 	}
 
 	return found;
 }
 
 static int
 channel_cancel_rport_listener_streamlocal(struct ssh *ssh, const char *path)
 {
 	u_int i;
 	int found = 0;
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		Channel *c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_RUNIX_LISTENER)
 			continue;
 		if (c->path == NULL)
 			continue;
 		if (strcmp(c->path, path) == 0) {
 			debug2_f("close channel %d", i);
 			channel_free(ssh, c);
 			found = 1;
 		}
 	}
 
 	return found;
 }
 
 int
 channel_cancel_rport_listener(struct ssh *ssh, struct Forward *fwd)
 {
 	if (fwd->listen_path != NULL) {
 		return channel_cancel_rport_listener_streamlocal(ssh,
 		    fwd->listen_path);
 	} else {
 		return channel_cancel_rport_listener_tcpip(ssh,
 		    fwd->listen_host, fwd->listen_port);
 	}
 }
 
 static int
 channel_cancel_lport_listener_tcpip(struct ssh *ssh,
     const char *lhost, u_short lport, int cport,
     struct ForwardOptions *fwd_opts)
 {
 	u_int i;
 	int found = 0;
 	const char *addr = channel_fwd_bind_addr(ssh, lhost, NULL, 1, fwd_opts);
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		Channel *c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_PORT_LISTENER)
 			continue;
 		if (c->listening_port != lport)
 			continue;
 		if (cport == CHANNEL_CANCEL_PORT_STATIC) {
 			/* skip dynamic forwardings */
 			if (c->host_port == 0)
 				continue;
 		} else {
 			if (c->host_port != cport)
 				continue;
 		}
 		if ((c->listening_addr == NULL && addr != NULL) ||
 		    (c->listening_addr != NULL && addr == NULL))
 			continue;
 		if (addr == NULL || strcmp(c->listening_addr, addr) == 0) {
 			debug2_f("close channel %d", i);
 			channel_free(ssh, c);
 			found = 1;
 		}
 	}
 
 	return found;
 }
 
 static int
 channel_cancel_lport_listener_streamlocal(struct ssh *ssh, const char *path)
 {
 	u_int i;
 	int found = 0;
 
 	if (path == NULL) {
 		error_f("no path specified.");
 		return 0;
 	}
 
 	for (i = 0; i < ssh->chanctxt->channels_alloc; i++) {
 		Channel *c = ssh->chanctxt->channels[i];
 		if (c == NULL || c->type != SSH_CHANNEL_UNIX_LISTENER)
 			continue;
 		if (c->listening_addr == NULL)
 			continue;
 		if (strcmp(c->listening_addr, path) == 0) {
 			debug2_f("close channel %d", i);
 			channel_free(ssh, c);
 			found = 1;
 		}
 	}
 
 	return found;
 }
 
 int
 channel_cancel_lport_listener(struct ssh *ssh,
     struct Forward *fwd, int cport, struct ForwardOptions *fwd_opts)
 {
 	if (fwd->listen_path != NULL) {
 		return channel_cancel_lport_listener_streamlocal(ssh,
 		    fwd->listen_path);
 	} else {
 		return channel_cancel_lport_listener_tcpip(ssh,
 		    fwd->listen_host, fwd->listen_port, cport, fwd_opts);
 	}
 }
 
 /* protocol local port fwd, used by ssh */
 int
 channel_setup_local_fwd_listener(struct ssh *ssh,
     struct Forward *fwd, struct ForwardOptions *fwd_opts)
 {
 	if (fwd->listen_path != NULL) {
 		return channel_setup_fwd_listener_streamlocal(ssh,
 		    SSH_CHANNEL_UNIX_LISTENER, fwd, fwd_opts);
 	} else {
 		return channel_setup_fwd_listener_tcpip(ssh,
 		    SSH_CHANNEL_PORT_LISTENER, fwd, NULL, fwd_opts);
 	}
 }
 
 /* Matches a remote forwarding permission against a requested forwarding */
 static int
 remote_open_match(struct permission *allowed_open, struct Forward *fwd)
 {
 	int ret;
 	char *lhost;
 
 	/* XXX add ACLs for streamlocal */
 	if (fwd->listen_path != NULL)
 		return 1;
 
 	if (fwd->listen_host == NULL || allowed_open->listen_host == NULL)
 		return 0;
 
 	if (allowed_open->listen_port != FWD_PERMIT_ANY_PORT &&
 	    allowed_open->listen_port != fwd->listen_port)
 		return 0;
 
 	/* Match hostnames case-insensitively */
 	lhost = xstrdup(fwd->listen_host);
 	lowercase(lhost);
 	ret = match_pattern(lhost, allowed_open->listen_host);
 	free(lhost);
 
 	return ret;
 }
 
 /* Checks whether a requested remote forwarding is permitted */
 static int
 check_rfwd_permission(struct ssh *ssh, struct Forward *fwd)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->remote_perms;
 	u_int i, permit, permit_adm = 1;
 	struct permission *perm;
 
 	/* XXX apply GatewayPorts override before checking? */
 
 	permit = pset->all_permitted;
 	if (!permit) {
 		for (i = 0; i < pset->num_permitted_user; i++) {
 			perm = &pset->permitted_user[i];
 			if (remote_open_match(perm, fwd)) {
 				permit = 1;
 				break;
 			}
 		}
 	}
 
 	if (pset->num_permitted_admin > 0) {
 		permit_adm = 0;
 		for (i = 0; i < pset->num_permitted_admin; i++) {
 			perm = &pset->permitted_admin[i];
 			if (remote_open_match(perm, fwd)) {
 				permit_adm = 1;
 				break;
 			}
 		}
 	}
 
 	return permit && permit_adm;
 }
 
 /* protocol v2 remote port fwd, used by sshd */
 int
 channel_setup_remote_fwd_listener(struct ssh *ssh, struct Forward *fwd,
     int *allocated_listen_port, struct ForwardOptions *fwd_opts)
 {
 	if (!check_rfwd_permission(ssh, fwd)) {
 		ssh_packet_send_debug(ssh, "port forwarding refused");
 		if (fwd->listen_path != NULL)
 			/* XXX always allowed, see remote_open_match() */
 			logit("Received request from %.100s port %d to "
 			    "remote forward to path \"%.100s\", "
 			    "but the request was denied.",
 			    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 			    fwd->listen_path);
 		else if(fwd->listen_host != NULL)
 			logit("Received request from %.100s port %d to "
 			    "remote forward to host %.100s port %d, "
 			    "but the request was denied.",
 			    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 			    fwd->listen_host, fwd->listen_port );
 		else
 			logit("Received request from %.100s port %d to remote "
 			    "forward, but the request was denied.",
 			    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh));
 		return 0;
 	}
 	if (fwd->listen_path != NULL) {
 		return channel_setup_fwd_listener_streamlocal(ssh,
 		    SSH_CHANNEL_RUNIX_LISTENER, fwd, fwd_opts);
 	} else {
 		return channel_setup_fwd_listener_tcpip(ssh,
 		    SSH_CHANNEL_RPORT_LISTENER, fwd, allocated_listen_port,
 		    fwd_opts);
 	}
 }
 
 /*
  * Translate the requested rfwd listen host to something usable for
  * this server.
  */
 static const char *
 channel_rfwd_bind_host(const char *listen_host)
 {
 	if (listen_host == NULL) {
 		return "localhost";
 	} else if (*listen_host == '\0' || strcmp(listen_host, "*") == 0) {
 		return "";
 	} else
 		return listen_host;
 }
 
 /*
  * Initiate forwarding of connections to port "port" on remote host through
  * the secure channel to host:port from local side.
  * Returns handle (index) for updating the dynamic listen port with
  * channel_update_permission().
  */
 int
 channel_request_remote_forwarding(struct ssh *ssh, struct Forward *fwd)
 {
 	int r, success = 0, idx = -1;
 	const char *host_to_connect, *listen_host, *listen_path;
 	int port_to_connect, listen_port;
 
 	/* Send the forward request to the remote side. */
 	if (fwd->listen_path != NULL) {
 		if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh,
 		    "streamlocal-forward@openssh.com")) != 0 ||
 		    (r = sshpkt_put_u8(ssh, 1)) != 0 || /* want reply */
 		    (r = sshpkt_put_cstring(ssh, fwd->listen_path)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0 ||
 		    (r = ssh_packet_write_wait(ssh)) != 0)
 			fatal_fr(r, "request streamlocal");
 	} else {
 		if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh, "tcpip-forward")) != 0 ||
 		    (r = sshpkt_put_u8(ssh, 1)) != 0 || /* want reply */
 		    (r = sshpkt_put_cstring(ssh,
 		    channel_rfwd_bind_host(fwd->listen_host))) != 0 ||
 		    (r = sshpkt_put_u32(ssh, fwd->listen_port)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0 ||
 		    (r = ssh_packet_write_wait(ssh)) != 0)
 			fatal_fr(r, "request tcpip-forward");
 	}
 	/* Assume that server accepts the request */
 	success = 1;
 	if (success) {
 		/* Record that connection to this host/port is permitted. */
 		host_to_connect = listen_host = listen_path = NULL;
 		port_to_connect = listen_port = 0;
 		if (fwd->connect_path != NULL) {
 			host_to_connect = fwd->connect_path;
 			port_to_connect = PORT_STREAMLOCAL;
 		} else {
 			host_to_connect = fwd->connect_host;
 			port_to_connect = fwd->connect_port;
 		}
 		if (fwd->listen_path != NULL) {
 			listen_path = fwd->listen_path;
 			listen_port = PORT_STREAMLOCAL;
 		} else {
 			listen_host = fwd->listen_host;
 			listen_port = fwd->listen_port;
 		}
 		idx = permission_set_add(ssh, FORWARD_USER, FORWARD_LOCAL,
 		    host_to_connect, port_to_connect,
 		    listen_host, listen_path, listen_port, NULL);
 	}
 	return idx;
 }
 
 static int
 open_match(struct permission *allowed_open, const char *requestedhost,
     int requestedport)
 {
 	if (allowed_open->host_to_connect == NULL)
 		return 0;
 	if (allowed_open->port_to_connect != FWD_PERMIT_ANY_PORT &&
 	    allowed_open->port_to_connect != requestedport)
 		return 0;
 	if (strcmp(allowed_open->host_to_connect, FWD_PERMIT_ANY_HOST) != 0 &&
 	    strcmp(allowed_open->host_to_connect, requestedhost) != 0)
 		return 0;
 	return 1;
 }
 
 /*
  * Note that in the listen host/port case
  * we don't support FWD_PERMIT_ANY_PORT and
  * need to translate between the configured-host (listen_host)
  * and what we've sent to the remote server (channel_rfwd_bind_host)
  */
 static int
 open_listen_match_tcpip(struct permission *allowed_open,
     const char *requestedhost, u_short requestedport, int translate)
 {
 	const char *allowed_host;
 
 	if (allowed_open->host_to_connect == NULL)
 		return 0;
 	if (allowed_open->listen_port != requestedport)
 		return 0;
 	if (!translate && allowed_open->listen_host == NULL &&
 	    requestedhost == NULL)
 		return 1;
 	allowed_host = translate ?
 	    channel_rfwd_bind_host(allowed_open->listen_host) :
 	    allowed_open->listen_host;
 	if (allowed_host == NULL || requestedhost == NULL ||
 	    strcmp(allowed_host, requestedhost) != 0)
 		return 0;
 	return 1;
 }
 
 static int
 open_listen_match_streamlocal(struct permission *allowed_open,
     const char *requestedpath)
 {
 	if (allowed_open->host_to_connect == NULL)
 		return 0;
 	if (allowed_open->listen_port != PORT_STREAMLOCAL)
 		return 0;
 	if (allowed_open->listen_path == NULL ||
 	    strcmp(allowed_open->listen_path, requestedpath) != 0)
 		return 0;
 	return 1;
 }
 
 /*
  * Request cancellation of remote forwarding of connection host:port from
  * local side.
  */
 static int
 channel_request_rforward_cancel_tcpip(struct ssh *ssh,
     const char *host, u_short port)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	int r;
 	u_int i;
 	struct permission *perm = NULL;
 
 	for (i = 0; i < pset->num_permitted_user; i++) {
 		perm = &pset->permitted_user[i];
 		if (open_listen_match_tcpip(perm, host, port, 0))
 			break;
 		perm = NULL;
 	}
 	if (perm == NULL) {
 		debug_f("requested forward not found");
 		return -1;
 	}
 	if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "cancel-tcpip-forward")) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 0)) != 0 || /* want reply */
 	    (r = sshpkt_put_cstring(ssh, channel_rfwd_bind_host(host))) != 0 ||
 	    (r = sshpkt_put_u32(ssh, port)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send cancel");
 
 	fwd_perm_clear(perm); /* unregister */
 
 	return 0;
 }
 
 /*
  * Request cancellation of remote forwarding of Unix domain socket
  * path from local side.
  */
 static int
 channel_request_rforward_cancel_streamlocal(struct ssh *ssh, const char *path)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	int r;
 	u_int i;
 	struct permission *perm = NULL;
 
 	for (i = 0; i < pset->num_permitted_user; i++) {
 		perm = &pset->permitted_user[i];
 		if (open_listen_match_streamlocal(perm, path))
 			break;
 		perm = NULL;
 	}
 	if (perm == NULL) {
 		debug_f("requested forward not found");
 		return -1;
 	}
 	if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh,
 	    "cancel-streamlocal-forward@openssh.com")) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 0)) != 0 || /* want reply */
 	    (r = sshpkt_put_cstring(ssh, path)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send cancel");
 
 	fwd_perm_clear(perm); /* unregister */
 
 	return 0;
 }
 
 /*
  * Request cancellation of remote forwarding of a connection from local side.
  */
 int
 channel_request_rforward_cancel(struct ssh *ssh, struct Forward *fwd)
 {
 	if (fwd->listen_path != NULL) {
 		return channel_request_rforward_cancel_streamlocal(ssh,
 		    fwd->listen_path);
 	} else {
 		return channel_request_rforward_cancel_tcpip(ssh,
 		    fwd->listen_host,
 		    fwd->listen_port ? fwd->listen_port : fwd->allocated_port);
 	}
 }
 
 /*
  * Permits opening to any host/port if permitted_user[] is empty.  This is
  * usually called by the server, because the user could connect to any port
  * anyway, and the server has no way to know but to trust the client anyway.
  */
 void
 channel_permit_all(struct ssh *ssh, int where)
 {
 	struct permission_set *pset = permission_set_get(ssh, where);
 
 	if (pset->num_permitted_user == 0)
 		pset->all_permitted = 1;
 }
 
 /*
  * Permit the specified host/port for forwarding.
  */
 void
 channel_add_permission(struct ssh *ssh, int who, int where,
     char *host, int port)
 {
 	int local = where == FORWARD_LOCAL;
 	struct permission_set *pset = permission_set_get(ssh, where);
 
 	debug("allow %s forwarding to host %s port %d",
 	    fwd_ident(who, where), host, port);
 	/*
 	 * Remote forwards set listen_host/port, local forwards set
 	 * host/port_to_connect.
 	 */
 	permission_set_add(ssh, who, where,
 	    local ? host : 0, local ? port : 0,
 	    local ? NULL : host, NULL, local ? 0 : port, NULL);
 	pset->all_permitted = 0;
 }
 
 /*
  * Administratively disable forwarding.
  */
 void
 channel_disable_admin(struct ssh *ssh, int where)
 {
 	channel_clear_permission(ssh, FORWARD_ADM, where);
 	permission_set_add(ssh, FORWARD_ADM, where,
 	    NULL, 0, NULL, NULL, 0, NULL);
 }
 
 /*
  * Clear a list of permitted opens.
  */
 void
 channel_clear_permission(struct ssh *ssh, int who, int where)
 {
 	struct permission **permp;
 	u_int *npermp;
 
 	permission_set_get_array(ssh, who, where, &permp, &npermp);
 	*permp = xrecallocarray(*permp, *npermp, 0, sizeof(**permp));
 	*npermp = 0;
 }
 
 /*
  * Update the listen port for a dynamic remote forward, after
  * the actual 'newport' has been allocated. If 'newport' < 0 is
  * passed then they entry will be invalidated.
  */
 void
 channel_update_permission(struct ssh *ssh, int idx, int newport)
 {
 	struct permission_set *pset = &ssh->chanctxt->local_perms;
 
 	if (idx < 0 || (u_int)idx >= pset->num_permitted_user) {
 		debug_f("index out of range: %d num_permitted_user %d",
 		    idx, pset->num_permitted_user);
 		return;
 	}
 	debug("%s allowed port %d for forwarding to host %s port %d",
 	    newport > 0 ? "Updating" : "Removing",
 	    newport,
 	    pset->permitted_user[idx].host_to_connect,
 	    pset->permitted_user[idx].port_to_connect);
 	if (newport <= 0)
 		fwd_perm_clear(&pset->permitted_user[idx]);
 	else {
 		pset->permitted_user[idx].listen_port =
 		    (ssh->compat & SSH_BUG_DYNAMIC_RPORT) ? 0 : newport;
 	}
 }
 
 /* returns port number, FWD_PERMIT_ANY_PORT or -1 on error */
 int
 permitopen_port(const char *p)
 {
 	int port;
 
 	if (strcmp(p, "*") == 0)
 		return FWD_PERMIT_ANY_PORT;
 	if ((port = a2port(p)) > 0)
 		return port;
 	return -1;
 }
 
 /* Try to start non-blocking connect to next host in cctx list */
 static int
 connect_next(struct channel_connect *cctx)
 {
 	int sock, saved_errno;
 	struct sockaddr_un *sunaddr;
 	char ntop[NI_MAXHOST];
 	char strport[MAXIMUM(NI_MAXSERV, sizeof(sunaddr->sun_path))];
 
 	for (; cctx->ai; cctx->ai = cctx->ai->ai_next) {
 		switch (cctx->ai->ai_family) {
 		case AF_UNIX:
 			/* unix:pathname instead of host:port */
 			sunaddr = (struct sockaddr_un *)cctx->ai->ai_addr;
 			strlcpy(ntop, "unix", sizeof(ntop));
 			strlcpy(strport, sunaddr->sun_path, sizeof(strport));
 			break;
 		case AF_INET:
 		case AF_INET6:
 			if (getnameinfo(cctx->ai->ai_addr, cctx->ai->ai_addrlen,
 			    ntop, sizeof(ntop), strport, sizeof(strport),
 			    NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
 				error_f("getnameinfo failed");
 				continue;
 			}
 			break;
 		default:
 			continue;
 		}
 		debug_f("start for host %.100s ([%.100s]:%s)",
 		    cctx->host, ntop, strport);
 		if ((sock = socket(cctx->ai->ai_family, cctx->ai->ai_socktype,
 		    cctx->ai->ai_protocol)) == -1) {
 			if (cctx->ai->ai_next == NULL)
 				error("socket: %.100s", strerror(errno));
 			else
 				verbose("socket: %.100s", strerror(errno));
 			continue;
 		}
 		if (set_nonblock(sock) == -1)
 			fatal_f("set_nonblock(%d)", sock);
 		if (connect(sock, cctx->ai->ai_addr,
 		    cctx->ai->ai_addrlen) == -1 && errno != EINPROGRESS) {
 			debug_f("host %.100s ([%.100s]:%s): %.100s",
 			    cctx->host, ntop, strport, strerror(errno));
 			saved_errno = errno;
 			close(sock);
 			errno = saved_errno;
 			continue;	/* fail -- try next */
 		}
 		if (cctx->ai->ai_family != AF_UNIX)
 			set_nodelay(sock);
 		debug_f("connect host %.100s ([%.100s]:%s) in progress, fd=%d",
 		    cctx->host, ntop, strport, sock);
 		cctx->ai = cctx->ai->ai_next;
 		return sock;
 	}
 	return -1;
 }
 
 static void
 channel_connect_ctx_free(struct channel_connect *cctx)
 {
 	free(cctx->host);
 	if (cctx->aitop) {
 		if (cctx->aitop->ai_family == AF_UNIX)
 			free(cctx->aitop);
 		else
 			freeaddrinfo(cctx->aitop);
 	}
 	memset(cctx, 0, sizeof(*cctx));
 }
 
 /*
  * Return connecting socket to remote host:port or local socket path,
  * passing back the failure reason if appropriate.
  */
 static int
 connect_to_helper(struct ssh *ssh, const char *name, int port, int socktype,
     char *ctype, char *rname, struct channel_connect *cctx,
     int *reason, const char **errmsg)
 {
 	struct addrinfo hints;
 	int gaierr;
 	int sock = -1;
 	char strport[NI_MAXSERV];
 
 	if (port == PORT_STREAMLOCAL) {
 		struct sockaddr_un *sunaddr;
 		struct addrinfo *ai;
 
 		if (strlen(name) > sizeof(sunaddr->sun_path)) {
 			error("%.100s: %.100s", name, strerror(ENAMETOOLONG));
 			return -1;
 		}
 
 		/*
 		 * Fake up a struct addrinfo for AF_UNIX connections.
 		 * channel_connect_ctx_free() must check ai_family
 		 * and use free() not freeaddirinfo() for AF_UNIX.
 		 */
 		ai = xmalloc(sizeof(*ai) + sizeof(*sunaddr));
 		memset(ai, 0, sizeof(*ai) + sizeof(*sunaddr));
 		ai->ai_addr = (struct sockaddr *)(ai + 1);
 		ai->ai_addrlen = sizeof(*sunaddr);
 		ai->ai_family = AF_UNIX;
 		ai->ai_socktype = socktype;
 		ai->ai_protocol = PF_UNSPEC;
 		sunaddr = (struct sockaddr_un *)ai->ai_addr;
 		sunaddr->sun_family = AF_UNIX;
 		strlcpy(sunaddr->sun_path, name, sizeof(sunaddr->sun_path));
 		cctx->aitop = ai;
 	} else {
 		memset(&hints, 0, sizeof(hints));
 		hints.ai_family = ssh->chanctxt->IPv4or6;
 		hints.ai_socktype = socktype;
 		snprintf(strport, sizeof strport, "%d", port);
 		if ((gaierr = getaddrinfo(name, strport, &hints, &cctx->aitop))
 		    != 0) {
 			if (errmsg != NULL)
 				*errmsg = ssh_gai_strerror(gaierr);
 			if (reason != NULL)
 				*reason = SSH2_OPEN_CONNECT_FAILED;
 			error("connect_to %.100s: unknown host (%s)", name,
 			    ssh_gai_strerror(gaierr));
 			return -1;
 		}
 	}
 
 	cctx->host = xstrdup(name);
 	cctx->port = port;
 	cctx->ai = cctx->aitop;
 
 	if ((sock = connect_next(cctx)) == -1) {
 		error("connect to %.100s port %d failed: %s",
 		    name, port, strerror(errno));
 		return -1;
 	}
 
 	return sock;
 }
 
 /* Return CONNECTING channel to remote host:port or local socket path */
 static Channel *
 connect_to(struct ssh *ssh, const char *host, int port,
     char *ctype, char *rname)
 {
 	struct channel_connect cctx;
 	Channel *c;
 	int sock;
 
 	memset(&cctx, 0, sizeof(cctx));
 	sock = connect_to_helper(ssh, host, port, SOCK_STREAM, ctype, rname,
 	    &cctx, NULL, NULL);
 	if (sock == -1) {
 		channel_connect_ctx_free(&cctx);
 		return NULL;
 	}
 	c = channel_new(ssh, ctype, SSH_CHANNEL_CONNECTING, sock, sock, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, rname, 1);
 	c->host_port = port;
 	c->path = xstrdup(host);
 	c->connect_ctx = cctx;
 
 	return c;
 }
 
 /*
  * returns either the newly connected channel or the downstream channel
  * that needs to deal with this connection.
  */
 Channel *
 channel_connect_by_listen_address(struct ssh *ssh, const char *listen_host,
     u_short listen_port, char *ctype, char *rname)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	u_int i;
 	struct permission *perm;
 
 	for (i = 0; i < pset->num_permitted_user; i++) {
 		perm = &pset->permitted_user[i];
 		if (open_listen_match_tcpip(perm,
 		    listen_host, listen_port, 1)) {
 			if (perm->downstream)
 				return perm->downstream;
 			if (perm->port_to_connect == 0)
 				return rdynamic_connect_prepare(ssh,
 				    ctype, rname);
 			return connect_to(ssh,
 			    perm->host_to_connect, perm->port_to_connect,
 			    ctype, rname);
 		}
 	}
 	error("WARNING: Server requests forwarding for unknown listen_port %d",
 	    listen_port);
 	return NULL;
 }
 
 Channel *
 channel_connect_by_listen_path(struct ssh *ssh, const char *path,
     char *ctype, char *rname)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	u_int i;
 	struct permission *perm;
 
 	for (i = 0; i < pset->num_permitted_user; i++) {
 		perm = &pset->permitted_user[i];
 		if (open_listen_match_streamlocal(perm, path)) {
 			return connect_to(ssh,
 			    perm->host_to_connect, perm->port_to_connect,
 			    ctype, rname);
 		}
 	}
 	error("WARNING: Server requests forwarding for unknown path %.100s",
 	    path);
 	return NULL;
 }
 
 /* Check if connecting to that port is permitted and connect. */
 Channel *
 channel_connect_to_port(struct ssh *ssh, const char *host, u_short port,
     char *ctype, char *rname, int *reason, const char **errmsg)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	struct channel_connect cctx;
 	Channel *c;
 	u_int i, permit, permit_adm = 1;
 	int sock;
 	struct permission *perm;
 
 	permit = pset->all_permitted;
 	if (!permit) {
 		for (i = 0; i < pset->num_permitted_user; i++) {
 			perm = &pset->permitted_user[i];
 			if (open_match(perm, host, port)) {
 				permit = 1;
 				break;
 			}
 		}
 	}
 
 	if (pset->num_permitted_admin > 0) {
 		permit_adm = 0;
 		for (i = 0; i < pset->num_permitted_admin; i++) {
 			perm = &pset->permitted_admin[i];
 			if (open_match(perm, host, port)) {
 				permit_adm = 1;
 				break;
 			}
 		}
 	}
 
 	if (!permit || !permit_adm) {
 		logit("Received request from %.100s port %d to connect to "
 		    "host %.100s port %d, but the request was denied.",
 		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), host, port);
 		if (reason != NULL)
 			*reason = SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED;
 		return NULL;
 	}
 
 	memset(&cctx, 0, sizeof(cctx));
 	sock = connect_to_helper(ssh, host, port, SOCK_STREAM, ctype, rname,
 	    &cctx, reason, errmsg);
 	if (sock == -1) {
 		channel_connect_ctx_free(&cctx);
 		return NULL;
 	}
 
 	c = channel_new(ssh, ctype, SSH_CHANNEL_CONNECTING, sock, sock, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, rname, 1);
 	c->host_port = port;
 	c->path = xstrdup(host);
 	c->connect_ctx = cctx;
 
 	return c;
 }
 
 /* Check if connecting to that path is permitted and connect. */
 Channel *
 channel_connect_to_path(struct ssh *ssh, const char *path,
     char *ctype, char *rname)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	u_int i, permit, permit_adm = 1;
 	struct permission *perm;
 
 	permit = pset->all_permitted;
 	if (!permit) {
 		for (i = 0; i < pset->num_permitted_user; i++) {
 			perm = &pset->permitted_user[i];
 			if (open_match(perm, path, PORT_STREAMLOCAL)) {
 				permit = 1;
 				break;
 			}
 		}
 	}
 
 	if (pset->num_permitted_admin > 0) {
 		permit_adm = 0;
 		for (i = 0; i < pset->num_permitted_admin; i++) {
 			perm = &pset->permitted_admin[i];
 			if (open_match(perm, path, PORT_STREAMLOCAL)) {
 				permit_adm = 1;
 				break;
 			}
 		}
 	}
 
 	if (!permit || !permit_adm) {
 		logit("Received request to connect to path %.100s, "
 		    "but the request was denied.", path);
 		return NULL;
 	}
 	return connect_to(ssh, path, PORT_STREAMLOCAL, ctype, rname);
 }
 
 void
 channel_send_window_changes(struct ssh *ssh)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct winsize ws;
 	int r;
 	u_int i;
 
 	for (i = 0; i < sc->channels_alloc; i++) {
 		if (sc->channels[i] == NULL || !sc->channels[i]->client_tty ||
 		    sc->channels[i]->type != SSH_CHANNEL_OPEN)
 			continue;
 		if (ioctl(sc->channels[i]->rfd, TIOCGWINSZ, &ws) == -1)
 			continue;
 		channel_request_start(ssh, i, "window-change", 0);
 		if ((r = sshpkt_put_u32(ssh, (u_int)ws.ws_col)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_row)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_xpixel)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_ypixel)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "channel %u; send window-change", i);
 	}
 }
 
 /* Return RDYNAMIC_OPEN channel: channel allows SOCKS, but is not connected */
 static Channel *
 rdynamic_connect_prepare(struct ssh *ssh, char *ctype, char *rname)
 {
 	Channel *c;
 	int r;
 
 	c = channel_new(ssh, ctype, SSH_CHANNEL_RDYNAMIC_OPEN, -1, -1, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, rname, 1);
 	c->host_port = 0;
 	c->path = NULL;
 
 	/*
 	 * We need to open the channel before we have a FD,
 	 * so that we can get SOCKS header from peer.
 	 */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->self)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_window)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_maxpacket)) != 0)
 		fatal_fr(r, "channel %i; confirm", c->self);
 	return c;
 }
 
 /* Return CONNECTING socket to remote host:port or local socket path */
 static int
 rdynamic_connect_finish(struct ssh *ssh, Channel *c)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	struct permission_set *pset = &sc->local_perms;
 	struct permission *perm;
 	struct channel_connect cctx;
 	u_int i, permit_adm = 1;
 	int sock;
 
 	if (pset->num_permitted_admin > 0) {
 		permit_adm = 0;
 		for (i = 0; i < pset->num_permitted_admin; i++) {
 			perm = &pset->permitted_admin[i];
 			if (open_match(perm, c->path, c->host_port)) {
 				permit_adm = 1;
 				break;
 			}
 		}
 	}
 	if (!permit_adm) {
 		debug_f("requested forward not permitted");
 		return -1;
 	}
 
 	memset(&cctx, 0, sizeof(cctx));
 	sock = connect_to_helper(ssh, c->path, c->host_port, SOCK_STREAM, NULL,
 	    NULL, &cctx, NULL, NULL);
 	if (sock == -1)
 		channel_connect_ctx_free(&cctx);
 	else {
 		/* similar to SSH_CHANNEL_CONNECTING but we've already sent the open */
 		c->type = SSH_CHANNEL_RDYNAMIC_FINISH;
 		c->connect_ctx = cctx;
 		channel_register_fds(ssh, c, sock, sock, -1, 0, 1, 0);
 	}
 	return sock;
 }
 
 /* -- X11 forwarding */
 
 /*
  * Creates an internet domain socket for listening for X11 connections.
  * Returns 0 and a suitable display number for the DISPLAY variable
  * stored in display_numberp , or -1 if an error occurs.
  */
 int
 x11_create_display_inet(struct ssh *ssh, int x11_display_offset,
     int x11_use_localhost, int single_connection,
     u_int *display_numberp, int **chanids)
 {
 	Channel *nc = NULL;
 	int display_number, sock;
 	u_short port;
 	struct addrinfo hints, *ai, *aitop;
 	char strport[NI_MAXSERV];
 	int gaierr, n, num_socks = 0, socks[NUM_SOCKS];
 
 	if (chanids == NULL)
 		return -1;
 
 	for (display_number = x11_display_offset;
 	    display_number < MAX_DISPLAYS;
 	    display_number++) {
 		port = 6000 + display_number;
 		memset(&hints, 0, sizeof(hints));
 		hints.ai_family = ssh->chanctxt->IPv4or6;
 		hints.ai_flags = x11_use_localhost ? 0: AI_PASSIVE;
 		hints.ai_socktype = SOCK_STREAM;
 		snprintf(strport, sizeof strport, "%d", port);
 		if ((gaierr = getaddrinfo(NULL, strport,
 		    &hints, &aitop)) != 0) {
 			error("getaddrinfo: %.100s", ssh_gai_strerror(gaierr));
 			return -1;
 		}
 		for (ai = aitop; ai; ai = ai->ai_next) {
 			if (ai->ai_family != AF_INET &&
 			    ai->ai_family != AF_INET6)
 				continue;
 			sock = socket(ai->ai_family, ai->ai_socktype,
 			    ai->ai_protocol);
 			if (sock == -1) {
 				if ((errno != EINVAL) && (errno != EAFNOSUPPORT)
 #ifdef EPFNOSUPPORT
 				    && (errno != EPFNOSUPPORT)
 #endif 
 				    ) {
 					error("socket: %.100s", strerror(errno));
 					freeaddrinfo(aitop);
 					return -1;
 				} else {
 					debug("x11_create_display_inet: Socket family %d not supported",
 						 ai->ai_family);
 					continue;
 				}
 			}
 			if (ai->ai_family == AF_INET6)
 				sock_set_v6only(sock);
 			if (x11_use_localhost)
 				set_reuseaddr(sock);
 			if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) {
 				debug2_f("bind port %d: %.100s", port,
 				    strerror(errno));
 				close(sock);
 				for (n = 0; n < num_socks; n++)
 					close(socks[n]);
 				num_socks = 0;
 				break;
 			}
 			socks[num_socks++] = sock;
 			if (num_socks == NUM_SOCKS)
 				break;
 		}
 		freeaddrinfo(aitop);
 		if (num_socks > 0)
 			break;
 	}
 	if (display_number >= MAX_DISPLAYS) {
 		error("Failed to allocate internet-domain X11 display socket.");
 		return -1;
 	}
 	/* Start listening for connections on the socket. */
 	for (n = 0; n < num_socks; n++) {
 		sock = socks[n];
 		if (listen(sock, SSH_LISTEN_BACKLOG) == -1) {
 			error("listen: %.100s", strerror(errno));
 			close(sock);
 			return -1;
 		}
 	}
 
 	/* Allocate a channel for each socket. */
 	*chanids = xcalloc(num_socks + 1, sizeof(**chanids));
 	for (n = 0; n < num_socks; n++) {
 		sock = socks[n];
 		nc = channel_new(ssh, "x11-listener",
 		    SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
 		    CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
 		    0, "X11 inet listener", 1);
 		nc->single_connection = single_connection;
 		(*chanids)[n] = nc->self;
 	}
 	(*chanids)[n] = -1;
 
 	/* Return the display number for the DISPLAY environment variable. */
 	*display_numberp = display_number;
 	return 0;
 }
 
 static int
 connect_local_xsocket_path(const char *pathname)
 {
 	int sock;
 	struct sockaddr_un addr;
 
 	sock = socket(AF_UNIX, SOCK_STREAM, 0);
 	if (sock == -1) {
 		error("socket: %.100s", strerror(errno));
 		return -1;
 	}
 	memset(&addr, 0, sizeof(addr));
 	addr.sun_family = AF_UNIX;
 	strlcpy(addr.sun_path, pathname, sizeof addr.sun_path);
 	if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == 0)
 		return sock;
 	close(sock);
 	error("connect %.100s: %.100s", addr.sun_path, strerror(errno));
 	return -1;
 }
 
 static int
 connect_local_xsocket(u_int dnr)
 {
 	char buf[1024];
 	snprintf(buf, sizeof buf, _PATH_UNIX_X, dnr);
 	return connect_local_xsocket_path(buf);
 }
 
 #ifdef __APPLE__
 static int
 is_path_to_xsocket(const char *display, char *path, size_t pathlen)
 {
 	struct stat sbuf;
 
 	if (strlcpy(path, display, pathlen) >= pathlen) {
 		error("%s: display path too long", __func__);
 		return 0;
 	}
 	if (display[0] != '/')
 		return 0;
 	if (stat(path, &sbuf) == 0) {
 		return 1;
 	} else {
 		char *dot = strrchr(path, '.');
 		if (dot != NULL) {
 			*dot = '\0';
 			if (stat(path, &sbuf) == 0) {
 				return 1;
 			}
 		}
 	}
 	return 0;
 }
 #endif
 
 int
 x11_connect_display(struct ssh *ssh)
 {
 	u_int display_number;
 	const char *display;
 	char buf[1024], *cp;
 	struct addrinfo hints, *ai, *aitop;
 	char strport[NI_MAXSERV];
 	int gaierr, sock = 0;
 
 	/* Try to open a socket for the local X server. */
 	display = getenv("DISPLAY");
 	if (!display) {
 		error("DISPLAY not set.");
 		return -1;
 	}
 	/*
 	 * Now we decode the value of the DISPLAY variable and make a
 	 * connection to the real X server.
 	 */
 
 #ifdef __APPLE__
 	/* Check if display is a path to a socket (as set by launchd). */
 	{
 		char path[PATH_MAX];
 
 		if (is_path_to_xsocket(display, path, sizeof(path))) {
 			debug("x11_connect_display: $DISPLAY is launchd");
 
 			/* Create a socket. */
 			sock = connect_local_xsocket_path(path);
 			if (sock < 0)
 				return -1;
 
 			/* OK, we now have a connection to the display. */
 			return sock;
 		}
 	}
 #endif
 	/*
 	 * Check if it is a unix domain socket.  Unix domain displays are in
 	 * one of the following formats: unix:d[.s], :d[.s], ::d[.s]
 	 */
 	if (strncmp(display, "unix:", 5) == 0 ||
 	    display[0] == ':') {
 		/* Connect to the unix domain socket. */
 		if (sscanf(strrchr(display, ':') + 1, "%u",
 		    &display_number) != 1) {
 			error("Could not parse display number from DISPLAY: "
 			    "%.100s", display);
 			return -1;
 		}
 		/* Create a socket. */
 		sock = connect_local_xsocket(display_number);
 		if (sock < 0)
 			return -1;
 
 		/* OK, we now have a connection to the display. */
 		return sock;
 	}
 	/*
 	 * Connect to an inet socket.  The DISPLAY value is supposedly
 	 * hostname:d[.s], where hostname may also be numeric IP address.
 	 */
 	strlcpy(buf, display, sizeof(buf));
 	cp = strchr(buf, ':');
 	if (!cp) {
 		error("Could not find ':' in DISPLAY: %.100s", display);
 		return -1;
 	}
 	*cp = 0;
 	/*
 	 * buf now contains the host name.  But first we parse the
 	 * display number.
 	 */
 	if (sscanf(cp + 1, "%u", &display_number) != 1) {
 		error("Could not parse display number from DISPLAY: %.100s",
 		    display);
 		return -1;
 	}
 
 	/* Look up the host address */
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = ssh->chanctxt->IPv4or6;
 	hints.ai_socktype = SOCK_STREAM;
 	snprintf(strport, sizeof strport, "%u", 6000 + display_number);
 	if ((gaierr = getaddrinfo(buf, strport, &hints, &aitop)) != 0) {
 		error("%.100s: unknown host. (%s)", buf,
 		ssh_gai_strerror(gaierr));
 		return -1;
 	}
 	for (ai = aitop; ai; ai = ai->ai_next) {
 		/* Create a socket. */
 		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (sock == -1) {
 			debug2("socket: %.100s", strerror(errno));
 			continue;
 		}
 		/* Connect it to the display. */
 		if (connect(sock, ai->ai_addr, ai->ai_addrlen) == -1) {
 			debug2("connect %.100s port %u: %.100s", buf,
 			    6000 + display_number, strerror(errno));
 			close(sock);
 			continue;
 		}
 		/* Success */
 		break;
 	}
 	freeaddrinfo(aitop);
 	if (!ai) {
 		error("connect %.100s port %u: %.100s", buf,
 		    6000 + display_number, strerror(errno));
 		return -1;
 	}
 	set_nodelay(sock);
 	return sock;
 }
 
 /*
  * Requests forwarding of X11 connections, generates fake authentication
  * data, and enables authentication spoofing.
  * This should be called in the client only.
  */
 void
 x11_request_forwarding_with_spoofing(struct ssh *ssh, int client_session_id,
     const char *disp, const char *proto, const char *data, int want_reply)
 {
 	struct ssh_channels *sc = ssh->chanctxt;
 	u_int data_len = (u_int) strlen(data) / 2;
 	u_int i, value;
 	const char *cp;
 	char *new_data;
 	int r, screen_number;
 
 	if (sc->x11_saved_display == NULL)
 		sc->x11_saved_display = xstrdup(disp);
 	else if (strcmp(disp, sc->x11_saved_display) != 0) {
 		error("x11_request_forwarding_with_spoofing: different "
 		    "$DISPLAY already forwarded");
 		return;
 	}
 
 	cp = strchr(disp, ':');
 	if (cp)
 		cp = strchr(cp, '.');
 	if (cp)
 		screen_number = (u_int)strtonum(cp + 1, 0, 400, NULL);
 	else
 		screen_number = 0;
 
 	if (sc->x11_saved_proto == NULL) {
 		/* Save protocol name. */
 		sc->x11_saved_proto = xstrdup(proto);
 
 		/* Extract real authentication data. */
 		sc->x11_saved_data = xmalloc(data_len);
 		for (i = 0; i < data_len; i++) {
 			if (sscanf(data + 2 * i, "%2x", &value) != 1) {
 				fatal("x11_request_forwarding: bad "
 				    "authentication data: %.100s", data);
 			}
 			sc->x11_saved_data[i] = value;
 		}
 		sc->x11_saved_data_len = data_len;
 
 		/* Generate fake data of the same length. */
 		sc->x11_fake_data = xmalloc(data_len);
 		arc4random_buf(sc->x11_fake_data, data_len);
 		sc->x11_fake_data_len = data_len;
 	}
 
 	/* Convert the fake data into hex. */
 	new_data = tohex(sc->x11_fake_data, data_len);
 
 	/* Send the request packet. */
 	channel_request_start(ssh, client_session_id, "x11-req", want_reply);
 	if ((r = sshpkt_put_u8(ssh, 0)) != 0 || /* bool: single connection */
 	    (r = sshpkt_put_cstring(ssh, proto)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, new_data)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, screen_number)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0 ||
 	    (r = ssh_packet_write_wait(ssh)) != 0)
 		fatal_fr(r, "send x11-req");
 	free(new_data);
 }
diff --git a/clientloop.c b/clientloop.c
index eb4902905fb1..8ec36af94b3f 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -1,2877 +1,2877 @@
-/* $OpenBSD: clientloop.c,v 1.402 2023/11/24 00:31:30 dtucker Exp $ */
+/* $OpenBSD: clientloop.c,v 1.403 2024/02/21 05:57:34 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * The main loop for the interactive session (client side).
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  *
  * Copyright (c) 1999 Theo de Raadt.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *
  * SSH2 support added by Markus Friedl.
  * Copyright (c) 1999, 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/socket.h>
 
 #include <ctype.h>
 #include <errno.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <termios.h>
 #include <pwd.h>
 #include <unistd.h>
 #include <limits.h>
 
 #include "openbsd-compat/sys-queue.h"
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "packet.h"
 #include "sshbuf.h"
 #include "compat.h"
 #include "channels.h"
 #include "dispatch.h"
 #include "sshkey.h"
 #include "cipher.h"
 #include "kex.h"
 #include "myproposal.h"
 #include "log.h"
 #include "misc.h"
 #include "readconf.h"
 #include "clientloop.h"
 #include "sshconnect.h"
 #include "authfd.h"
 #include "atomicio.h"
 #include "sshpty.h"
 #include "match.h"
 #include "msg.h"
 #include "ssherr.h"
 #include "hostfile.h"
 
 /* Permitted RSA signature algorithms for UpdateHostkeys proofs */
 #define HOSTKEY_PROOF_RSA_ALGS	"rsa-sha2-512,rsa-sha2-256"
 
 /* Uncertainty (in percent) of keystroke timing intervals */
 #define SSH_KEYSTROKE_TIMING_FUZZ 10
 
 /* import options */
 extern Options options;
 
 /* Control socket */
 extern int muxserver_sock; /* XXX use mux_client_cleanup() instead */
 
 /*
  * Name of the host we are connecting to.  This is the name given on the
  * command line, or the Hostname specified for the user-supplied name in a
  * configuration file.
  */
 extern char *host;
 
 /*
  * If this field is not NULL, the ForwardAgent socket is this path and different
  * instead of SSH_AUTH_SOCK.
  */
 extern char *forward_agent_sock_path;
 
 /*
  * Flag to indicate that we have received a window change signal which has
  * not yet been processed.  This will cause a message indicating the new
  * window size to be sent to the server a little later.  This is volatile
  * because this is updated in a signal handler.
  */
 static volatile sig_atomic_t received_window_change_signal = 0;
 static volatile sig_atomic_t received_signal = 0;
 
 /* Time when backgrounded control master using ControlPersist should exit */
 static time_t control_persist_exit_time = 0;
 
 /* Common data for the client loop code. */
 volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */
 static int last_was_cr;		/* Last character was a newline. */
 static int exit_status;		/* Used to store the command exit status. */
 static struct sshbuf *stderr_buffer;	/* Used for final exit message. */
 static int connection_in;	/* Connection to server (input). */
 static int connection_out;	/* Connection to server (output). */
 static int need_rekeying;	/* Set to non-zero if rekeying is requested. */
 static int session_closed;	/* In SSH2: login session closed. */
 static time_t x11_refuse_time;	/* If >0, refuse x11 opens after this time. */
 static time_t server_alive_time;	/* Time to do server_alive_check */
 static int hostkeys_update_complete;
 static int session_setup_complete;
 
 static void client_init_dispatch(struct ssh *ssh);
 int	session_ident = -1;
 
 /* Track escape per proto2 channel */
 struct escape_filter_ctx {
 	int escape_pending;
 	int escape_char;
 };
 
 /* Context for channel confirmation replies */
 struct channel_reply_ctx {
 	const char *request_type;
 	int id;
 	enum confirm_action action;
 };
 
 /* Global request success/failure callbacks */
 /* XXX move to struct ssh? */
 struct global_confirm {
 	TAILQ_ENTRY(global_confirm) entry;
 	global_confirm_cb *cb;
 	void *ctx;
 	int ref_count;
 };
 TAILQ_HEAD(global_confirms, global_confirm);
 static struct global_confirms global_confirms =
     TAILQ_HEAD_INITIALIZER(global_confirms);
 
 void ssh_process_session2_setup(int, int, int, struct sshbuf *);
 static void quit_message(const char *fmt, ...)
     __attribute__((__format__ (printf, 1, 2)));
 
 static void
 quit_message(const char *fmt, ...)
 {
 	char *msg;
 	va_list args;
 	int r;
 
 	va_start(args, fmt);
 	xvasprintf(&msg, fmt, args);
 	va_end(args);
 
 	if ((r = sshbuf_putf(stderr_buffer, "%s\r\n", msg)) != 0)
 		fatal_fr(r, "sshbuf_putf");
 	free(msg);
 	quit_pending = 1;
 }
 
 /*
  * Signal handler for the window change signal (SIGWINCH).  This just sets a
  * flag indicating that the window has changed.
  */
 static void
 window_change_handler(int sig)
 {
 	received_window_change_signal = 1;
 }
 
 /*
  * Signal handler for signals that cause the program to terminate.  These
  * signals must be trapped to restore terminal modes.
  */
 static void
 signal_handler(int sig)
 {
 	received_signal = sig;
 	quit_pending = 1;
 }
 
 /*
  * Sets control_persist_exit_time to the absolute time when the
  * backgrounded control master should exit due to expiry of the
  * ControlPersist timeout.  Sets it to 0 if we are not a backgrounded
  * control master process, or if there is no ControlPersist timeout.
  */
 static void
 set_control_persist_exit_time(struct ssh *ssh)
 {
 	if (muxserver_sock == -1 || !options.control_persist
 	    || options.control_persist_timeout == 0) {
 		/* not using a ControlPersist timeout */
 		control_persist_exit_time = 0;
 	} else if (channel_still_open(ssh)) {
 		/* some client connections are still open */
 		if (control_persist_exit_time > 0)
 			debug2_f("cancel scheduled exit");
 		control_persist_exit_time = 0;
 	} else if (control_persist_exit_time <= 0) {
 		/* a client connection has recently closed */
 		control_persist_exit_time = monotime() +
 			(time_t)options.control_persist_timeout;
 		debug2_f("schedule exit in %d seconds",
 		    options.control_persist_timeout);
 	}
 	/* else we are already counting down to the timeout */
 }
 
 #define SSH_X11_VALID_DISPLAY_CHARS ":/.-_"
 static int
 client_x11_display_valid(const char *display)
 {
 	size_t i, dlen;
 
 	if (display == NULL)
 		return 0;
 
 	dlen = strlen(display);
 	for (i = 0; i < dlen; i++) {
 		if (!isalnum((u_char)display[i]) &&
 		    strchr(SSH_X11_VALID_DISPLAY_CHARS, display[i]) == NULL) {
 			debug("Invalid character '%c' in DISPLAY", display[i]);
 			return 0;
 		}
 	}
 	return 1;
 }
 
 #define SSH_X11_PROTO		"MIT-MAGIC-COOKIE-1"
 #define X11_TIMEOUT_SLACK	60
 int
 client_x11_get_proto(struct ssh *ssh, const char *display,
     const char *xauth_path, u_int trusted, u_int timeout,
     char **_proto, char **_data)
 {
 	char *cmd, line[512], xdisplay[512];
 	char xauthfile[PATH_MAX], xauthdir[PATH_MAX];
 	static char proto[512], data[512];
 	FILE *f;
 	int got_data = 0, generated = 0, do_unlink = 0, r;
 	struct stat st;
 	u_int now, x11_timeout_real;
 
 	*_proto = proto;
 	*_data = data;
 	proto[0] = data[0] = xauthfile[0] = xauthdir[0] = '\0';
 
 	if (!client_x11_display_valid(display)) {
 		if (display != NULL)
 			logit("DISPLAY \"%s\" invalid; disabling X11 forwarding",
 			    display);
 		return -1;
 	}
 	if (xauth_path != NULL && stat(xauth_path, &st) == -1) {
 		debug("No xauth program.");
 		xauth_path = NULL;
 	}
 
 	if (xauth_path != NULL) {
 		/*
 		 * Handle FamilyLocal case where $DISPLAY does
 		 * not match an authorization entry.  For this we
 		 * just try "xauth list unix:displaynum.screennum".
 		 * XXX: "localhost" match to determine FamilyLocal
 		 *      is not perfect.
 		 */
 		if (strncmp(display, "localhost:", 10) == 0) {
 			if ((r = snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
 			    display + 10)) < 0 ||
 			    (size_t)r >= sizeof(xdisplay)) {
 				error_f("display name too long");
 				return -1;
 			}
 			display = xdisplay;
 		}
 		if (trusted == 0) {
 			/*
 			 * Generate an untrusted X11 auth cookie.
 			 *
 			 * The authentication cookie should briefly outlive
 			 * ssh's willingness to forward X11 connections to
 			 * avoid nasty fail-open behaviour in the X server.
 			 */
 			mktemp_proto(xauthdir, sizeof(xauthdir));
 			if (mkdtemp(xauthdir) == NULL) {
 				error_f("mkdtemp: %s", strerror(errno));
 				return -1;
 			}
 			do_unlink = 1;
 			if ((r = snprintf(xauthfile, sizeof(xauthfile),
 			    "%s/xauthfile", xauthdir)) < 0 ||
 			    (size_t)r >= sizeof(xauthfile)) {
 				error_f("xauthfile path too long");
 				rmdir(xauthdir);
 				return -1;
 			}
 
 			if (timeout == 0) {
 				/* auth doesn't time out */
 				xasprintf(&cmd, "%s -f %s generate %s %s "
 				    "untrusted 2>%s",
 				    xauth_path, xauthfile, display,
 				    SSH_X11_PROTO, _PATH_DEVNULL);
 			} else {
 				/* Add some slack to requested expiry */
 				if (timeout < UINT_MAX - X11_TIMEOUT_SLACK)
 					x11_timeout_real = timeout +
 					    X11_TIMEOUT_SLACK;
 				else {
 					/* Don't overflow on long timeouts */
 					x11_timeout_real = UINT_MAX;
 				}
 				xasprintf(&cmd, "%s -f %s generate %s %s "
 				    "untrusted timeout %u 2>%s",
 				    xauth_path, xauthfile, display,
 				    SSH_X11_PROTO, x11_timeout_real,
 				    _PATH_DEVNULL);
 			}
 			debug2_f("xauth command: %s", cmd);
 
 			if (timeout != 0 && x11_refuse_time == 0) {
 				now = monotime() + 1;
 				if (SSH_TIME_T_MAX - timeout < now)
 					x11_refuse_time = SSH_TIME_T_MAX;
 				else
 					x11_refuse_time = now + timeout;
 				channel_set_x11_refuse_time(ssh,
 				    x11_refuse_time);
 			}
 			if (system(cmd) == 0)
 				generated = 1;
 			free(cmd);
 		}
 
 		/*
 		 * When in untrusted mode, we read the cookie only if it was
 		 * successfully generated as an untrusted one in the step
 		 * above.
 		 */
 		if (trusted || generated) {
 			xasprintf(&cmd,
 			    "%s %s%s list %s 2>" _PATH_DEVNULL,
 			    xauth_path,
 			    generated ? "-f " : "" ,
 			    generated ? xauthfile : "",
 			    display);
 			debug2("x11_get_proto: %s", cmd);
 			f = popen(cmd, "r");
 			if (f && fgets(line, sizeof(line), f) &&
 			    sscanf(line, "%*s %511s %511s", proto, data) == 2)
 				got_data = 1;
 			if (f)
 				pclose(f);
 			free(cmd);
 		}
 	}
 
 	if (do_unlink) {
 		unlink(xauthfile);
 		rmdir(xauthdir);
 	}
 
 	/* Don't fall back to fake X11 data for untrusted forwarding */
 	if (!trusted && !got_data) {
 		error("Warning: untrusted X11 forwarding setup failed: "
 		    "xauth key data not generated");
 		return -1;
 	}
 
 	/*
 	 * If we didn't get authentication data, just make up some
 	 * data.  The forwarding code will check the validity of the
 	 * response anyway, and substitute this data.  The X11
 	 * server, however, will ignore this fake data and use
 	 * whatever authentication mechanisms it was using otherwise
 	 * for the local connection.
 	 */
 	if (!got_data) {
 		u_int8_t rnd[16];
 		u_int i;
 
 		logit("Warning: No xauth data; "
 		    "using fake authentication data for X11 forwarding.");
 		strlcpy(proto, SSH_X11_PROTO, sizeof proto);
 		arc4random_buf(rnd, sizeof(rnd));
 		for (i = 0; i < sizeof(rnd); i++) {
 			snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
 			    rnd[i]);
 		}
 	}
 
 	return 0;
 }
 
 /*
  * Checks if the client window has changed, and sends a packet about it to
  * the server if so.  The actual change is detected elsewhere (by a software
  * interrupt on Unix); this just checks the flag and sends a message if
  * appropriate.
  */
 
 static void
 client_check_window_change(struct ssh *ssh)
 {
 	if (!received_window_change_signal)
 		return;
 	received_window_change_signal = 0;
 	debug2_f("changed");
 	channel_send_window_changes(ssh);
 }
 
 static int
 client_global_request_reply(int type, u_int32_t seq, struct ssh *ssh)
 {
 	struct global_confirm *gc;
 
 	if ((gc = TAILQ_FIRST(&global_confirms)) == NULL)
 		return 0;
 	if (gc->cb != NULL)
 		gc->cb(ssh, type, seq, gc->ctx);
 	if (--gc->ref_count <= 0) {
 		TAILQ_REMOVE(&global_confirms, gc, entry);
 		freezero(gc, sizeof(*gc));
 	}
 
 	ssh_packet_set_alive_timeouts(ssh, 0);
 	return 0;
 }
 
 static void
 schedule_server_alive_check(void)
 {
 	if (options.server_alive_interval > 0)
 		server_alive_time = monotime() + options.server_alive_interval;
 }
 
 static void
 server_alive_check(struct ssh *ssh)
 {
 	int r;
 
 	if (ssh_packet_inc_alive_timeouts(ssh) > options.server_alive_count_max) {
 		logit("Timeout, server %s not responding.", host);
 		cleanup_exit(255);
 	}
 	if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "keepalive@openssh.com")) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 1)) != 0 ||		/* boolean: want reply */
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 	/* Insert an empty placeholder to maintain ordering */
 	client_register_global_confirm(NULL, NULL);
 	schedule_server_alive_check();
 }
 
 /* Try to send a dummy keystroke */
 static int
 send_chaff(struct ssh *ssh)
 {
 	int r;
 
-	if ((ssh->kex->flags & KEX_HAS_PING) == 0)
+	if (ssh->kex == NULL || (ssh->kex->flags & KEX_HAS_PING) == 0)
 		return 0;
 	/* XXX probabilistically send chaff? */
 	/*
 	 * a SSH2_MSG_CHANNEL_DATA payload is 9 bytes:
 	 *    4 bytes channel ID + 4 bytes string length + 1 byte string data
 	 * simulate that here.
 	 */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_PING)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "PING!")) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 	return 1;
 }
 
 /* Sets the next interval to send a keystroke or chaff packet */
 static void
 set_next_interval(const struct timespec *now, struct timespec *next_interval,
     u_int interval_ms, int starting)
 {
 	struct timespec tmp;
 	long long interval_ns, fuzz_ns;
 	static long long rate_fuzz;
 
 	interval_ns = interval_ms * (1000LL * 1000);
 	fuzz_ns = (interval_ns * SSH_KEYSTROKE_TIMING_FUZZ) / 100;
 	/* Center fuzz around requested interval */
 	if (fuzz_ns > INT_MAX)
 		fuzz_ns = INT_MAX;
 	if (fuzz_ns > interval_ns) {
 		/* Shouldn't happen */
 		fatal_f("internal error: fuzz %u%% %lldns > interval %lldns",
 		    SSH_KEYSTROKE_TIMING_FUZZ, fuzz_ns, interval_ns);
 	}
 	/*
 	 * Randomise the keystroke/chaff intervals in two ways:
 	 * 1. Each interval has some random jitter applied to make the
 	 *    interval-to-interval time unpredictable.
 	 * 2. The overall interval rate is also randomly perturbed for each
 	 *    chaffing session to make the average rate unpredictable.
 	 */
 	if (starting)
 		rate_fuzz = arc4random_uniform(fuzz_ns);
 	interval_ns -= fuzz_ns;
 	interval_ns += arc4random_uniform(fuzz_ns) + rate_fuzz;
 
 	tmp.tv_sec = interval_ns / (1000 * 1000 * 1000);
 	tmp.tv_nsec = interval_ns % (1000 * 1000 * 1000);
 
 	timespecadd(now, &tmp, next_interval);
 }
 
 /*
  * Performs keystroke timing obfuscation. Returns non-zero if the
  * output fd should be polled.
  */
 static int
 obfuscate_keystroke_timing(struct ssh *ssh, struct timespec *timeout,
     int channel_did_enqueue)
 {
 	static int active;
 	static struct timespec next_interval, chaff_until;
 	struct timespec now, tmp;
 	int just_started = 0, had_keystroke = 0;
 	static unsigned long long nchaff;
 	char *stop_reason = NULL;
 	long long n;
 
 	monotime_ts(&now);
 
 	if (options.obscure_keystroke_timing_interval <= 0)
 		return 1;	/* disabled in config */
 
 	if (!channel_tty_open(ssh) || quit_pending) {
 		/* Stop if no channels left of we're waiting for one to close */
 		stop_reason = "no active channels";
 	} else if (ssh_packet_is_rekeying(ssh)) {
 		/* Stop if we're rekeying */
 		stop_reason = "rekeying started";
 	} else if (!ssh_packet_interactive_data_to_write(ssh) &&
 	    ssh_packet_have_data_to_write(ssh)) {
 		/* Stop if the output buffer has more than a few keystrokes */
 		stop_reason = "output buffer filling";
 	} else if (active && channel_did_enqueue &&
 	    ssh_packet_have_data_to_write(ssh)) {
 		/* Still in active mode and have a keystroke queued. */
 		had_keystroke = 1;
 	} else if (active) {
 		if (timespeccmp(&now, &chaff_until, >=)) {
 			/* Stop if there have been no keystrokes for a while */
 			stop_reason = "chaff time expired";
 		} else if (timespeccmp(&now, &next_interval, >=)) {
 			/* Otherwise if we were due to send, then send chaff */
 			if (send_chaff(ssh))
 				nchaff++;
 		}
 	}
 
 	if (stop_reason != NULL) {
 		if (active) {
 			debug3_f("stopping: %s (%llu chaff packets sent)",
 			    stop_reason, nchaff);
 			active = 0;
 		}
 		return 1;
 	}
 
 	/*
 	 * If we're in interactive mode, and only have a small amount
 	 * of outbound data, then we assume that the user is typing
 	 * interactively. In this case, start quantising outbound packets to
 	 * fixed time intervals to hide inter-keystroke timing.
 	 */
 	if (!active && ssh_packet_interactive_data_to_write(ssh) &&
 	    channel_did_enqueue && ssh_packet_have_data_to_write(ssh)) {
 		debug3_f("starting: interval ~%dms",
 		    options.obscure_keystroke_timing_interval);
 		just_started = had_keystroke = active = 1;
 		nchaff = 0;
 		set_next_interval(&now, &next_interval,
 		    options.obscure_keystroke_timing_interval, 1);
 	}
 
 	/* Don't hold off if obfuscation inactive */
 	if (!active)
 		return 1;
 
 	if (had_keystroke) {
 		/*
 		 * Arrange to send chaff packets for a random interval after
 		 * the last keystroke was sent.
 		 */
 		ms_to_timespec(&tmp, SSH_KEYSTROKE_CHAFF_MIN_MS +
 		    arc4random_uniform(SSH_KEYSTROKE_CHAFF_RNG_MS));
 		timespecadd(&now, &tmp, &chaff_until);
 	}
 
 	ptimeout_deadline_monotime_tsp(timeout, &next_interval);
 
 	if (just_started)
 		return 1;
 
 	/* Don't arm output fd for poll until the timing interval has elapsed */
 	if (timespeccmp(&now, &next_interval, <))
 		return 0;
 
 	/* Calculate number of intervals missed since the last check */
 	n = (now.tv_sec - next_interval.tv_sec) * 1000LL * 1000 * 1000;
 	n += now.tv_nsec - next_interval.tv_nsec;
 	n /= options.obscure_keystroke_timing_interval * 1000LL * 1000;
 	n = (n < 0) ? 1 : n + 1;
 
 	/* Advance to the next interval */
 	set_next_interval(&now, &next_interval,
 	    options.obscure_keystroke_timing_interval * n, 0);
 	return 1;
 }
 
 /*
  * Waits until the client can do something (some data becomes available on
  * one of the file descriptors).
  */
 static void
 client_wait_until_can_do_something(struct ssh *ssh, struct pollfd **pfdp,
     u_int *npfd_allocp, u_int *npfd_activep, int channel_did_enqueue,
     sigset_t *sigsetp, int *conn_in_readyp, int *conn_out_readyp)
 {
 	struct timespec timeout;
 	int ret, oready;
 	u_int p;
 
 	*conn_in_readyp = *conn_out_readyp = 0;
 
 	/* Prepare channel poll. First two pollfd entries are reserved */
 	ptimeout_init(&timeout);
 	channel_prepare_poll(ssh, pfdp, npfd_allocp, npfd_activep, 2, &timeout);
 	if (*npfd_activep < 2)
 		fatal_f("bad npfd %u", *npfd_activep); /* shouldn't happen */
 
 	/* channel_prepare_poll could have closed the last channel */
 	if (session_closed && !channel_still_open(ssh) &&
 	    !ssh_packet_have_data_to_write(ssh)) {
 		/* clear events since we did not call poll() */
 		for (p = 0; p < *npfd_activep; p++)
 			(*pfdp)[p].revents = 0;
 		return;
 	}
 
 	oready = obfuscate_keystroke_timing(ssh, &timeout, channel_did_enqueue);
 
 	/* Monitor server connection on reserved pollfd entries */
 	(*pfdp)[0].fd = connection_in;
 	(*pfdp)[0].events = POLLIN;
 	(*pfdp)[1].fd = connection_out;
 	(*pfdp)[1].events = (oready && ssh_packet_have_data_to_write(ssh)) ?
 	    POLLOUT : 0;
 
 	/*
 	 * Wait for something to happen.  This will suspend the process until
 	 * some polled descriptor can be read, written, or has some other
 	 * event pending, or a timeout expires.
 	 */
 	set_control_persist_exit_time(ssh);
 	if (control_persist_exit_time > 0)
 		ptimeout_deadline_monotime(&timeout, control_persist_exit_time);
 	if (options.server_alive_interval > 0)
 		ptimeout_deadline_monotime(&timeout, server_alive_time);
 	if (options.rekey_interval > 0 && !ssh_packet_is_rekeying(ssh)) {
 		ptimeout_deadline_sec(&timeout,
 		    ssh_packet_get_rekey_timeout(ssh));
 	}
 
 	ret = ppoll(*pfdp, *npfd_activep, ptimeout_get_tsp(&timeout), sigsetp);
 
 	if (ret == -1) {
 		/*
 		 * We have to clear the events because we return.
 		 * We have to return, because the mainloop checks for the flags
 		 * set by the signal handlers.
 		 */
 		for (p = 0; p < *npfd_activep; p++)
 			(*pfdp)[p].revents = 0;
 		if (errno == EINTR)
 			return;
 		/* Note: we might still have data in the buffers. */
 		quit_message("poll: %s", strerror(errno));
 		return;
 	}
 
 	*conn_in_readyp = (*pfdp)[0].revents != 0;
 	*conn_out_readyp = (*pfdp)[1].revents != 0;
 
 	if (options.server_alive_interval > 0 && !*conn_in_readyp &&
 	    monotime() >= server_alive_time) {
 		/*
 		 * ServerAlive check is needed. We can't rely on the poll
 		 * timing out since traffic on the client side such as port
 		 * forwards can keep waking it up.
 		 */
 		server_alive_check(ssh);
 	}
 }
 
 static void
 client_suspend_self(struct sshbuf *bin, struct sshbuf *bout, struct sshbuf *berr)
 {
 	/* Flush stdout and stderr buffers. */
 	if (sshbuf_len(bout) > 0)
 		atomicio(vwrite, fileno(stdout), sshbuf_mutable_ptr(bout),
 		    sshbuf_len(bout));
 	if (sshbuf_len(berr) > 0)
 		atomicio(vwrite, fileno(stderr), sshbuf_mutable_ptr(berr),
 		    sshbuf_len(berr));
 
 	leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 
 	sshbuf_reset(bin);
 	sshbuf_reset(bout);
 	sshbuf_reset(berr);
 
 	/* Send the suspend signal to the program itself. */
 	kill(getpid(), SIGTSTP);
 
 	/* Reset window sizes in case they have changed */
 	received_window_change_signal = 1;
 
 	enter_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 }
 
 static void
 client_process_net_input(struct ssh *ssh)
 {
 	int r;
 
 	/*
 	 * Read input from the server, and add any such data to the buffer of
 	 * the packet subsystem.
 	 */
 	schedule_server_alive_check();
 	if ((r = ssh_packet_process_read(ssh, connection_in)) == 0)
 		return; /* success */
 	if (r == SSH_ERR_SYSTEM_ERROR) {
 		if (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)
 			return;
 		if (errno == EPIPE) {
 			quit_message("Connection to %s closed by remote host.",
 			    host);
 			return;
 		}
 	}
 	quit_message("Read from remote host %s: %s", host, ssh_err(r));
 }
 
 static void
 client_status_confirm(struct ssh *ssh, int type, Channel *c, void *ctx)
 {
 	struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx;
 	char errmsg[256];
 	int r, tochan;
 
 	/*
 	 * If a TTY was explicitly requested, then a failure to allocate
 	 * one is fatal.
 	 */
 	if (cr->action == CONFIRM_TTY &&
 	    (options.request_tty == REQUEST_TTY_FORCE ||
 	    options.request_tty == REQUEST_TTY_YES))
 		cr->action = CONFIRM_CLOSE;
 
 	/* XXX suppress on mux _client_ quietmode */
 	tochan = options.log_level >= SYSLOG_LEVEL_ERROR &&
 	    c->ctl_chan != -1 && c->extended_usage == CHAN_EXTENDED_WRITE;
 
 	if (type == SSH2_MSG_CHANNEL_SUCCESS) {
 		debug2("%s request accepted on channel %d",
 		    cr->request_type, c->self);
 	} else if (type == SSH2_MSG_CHANNEL_FAILURE) {
 		if (tochan) {
 			snprintf(errmsg, sizeof(errmsg),
 			    "%s request failed\r\n", cr->request_type);
 		} else {
 			snprintf(errmsg, sizeof(errmsg),
 			    "%s request failed on channel %d",
 			    cr->request_type, c->self);
 		}
 		/* If error occurred on primary session channel, then exit */
 		if (cr->action == CONFIRM_CLOSE && c->self == session_ident)
 			fatal("%s", errmsg);
 		/*
 		 * If error occurred on mux client, append to
 		 * their stderr.
 		 */
 		if (tochan) {
 			debug3_f("channel %d: mux request: %s", c->self,
 			    cr->request_type);
 			if ((r = sshbuf_put(c->extended, errmsg,
 			    strlen(errmsg))) != 0)
 				fatal_fr(r, "sshbuf_put");
 		} else
 			error("%s", errmsg);
 		if (cr->action == CONFIRM_TTY) {
 			/*
 			 * If a TTY allocation error occurred, then arrange
 			 * for the correct TTY to leave raw mode.
 			 */
 			if (c->self == session_ident)
 				leave_raw_mode(0);
 			else
 				mux_tty_alloc_failed(ssh, c);
 		} else if (cr->action == CONFIRM_CLOSE) {
 			chan_read_failed(ssh, c);
 			chan_write_failed(ssh, c);
 		}
 	}
 	free(cr);
 }
 
 static void
 client_abandon_status_confirm(struct ssh *ssh, Channel *c, void *ctx)
 {
 	free(ctx);
 }
 
 void
 client_expect_confirm(struct ssh *ssh, int id, const char *request,
     enum confirm_action action)
 {
 	struct channel_reply_ctx *cr = xcalloc(1, sizeof(*cr));
 
 	cr->request_type = request;
 	cr->action = action;
 
 	channel_register_status_confirm(ssh, id, client_status_confirm,
 	    client_abandon_status_confirm, cr);
 }
 
 void
 client_register_global_confirm(global_confirm_cb *cb, void *ctx)
 {
 	struct global_confirm *gc, *last_gc;
 
 	/* Coalesce identical callbacks */
 	last_gc = TAILQ_LAST(&global_confirms, global_confirms);
 	if (last_gc && last_gc->cb == cb && last_gc->ctx == ctx) {
 		if (++last_gc->ref_count >= INT_MAX)
 			fatal_f("last_gc->ref_count = %d",
 			    last_gc->ref_count);
 		return;
 	}
 
 	gc = xcalloc(1, sizeof(*gc));
 	gc->cb = cb;
 	gc->ctx = ctx;
 	gc->ref_count = 1;
 	TAILQ_INSERT_TAIL(&global_confirms, gc, entry);
 }
 
 /*
  * Returns non-zero if the client is able to handle a hostkeys-00@openssh.com
  * hostkey update request.
  */
 static int
 can_update_hostkeys(void)
 {
 	if (hostkeys_update_complete)
 		return 0;
 	if (options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK &&
 	    options.batch_mode)
 		return 0; /* won't ask in batchmode, so don't even try */
 	if (!options.update_hostkeys || options.num_user_hostfiles <= 0)
 		return 0;
 	return 1;
 }
 
 static void
 client_repledge(void)
 {
 	debug3_f("enter");
 
 	/* Might be able to tighten pledge now that session is established */
 	if (options.control_master || options.control_path != NULL ||
 	    options.forward_x11 || options.fork_after_authentication ||
 	    can_update_hostkeys() ||
 	    (session_ident != -1 && !session_setup_complete)) {
 		/* Can't tighten */
 		return;
 	}
 	/*
 	 * LocalCommand and UpdateHostkeys have finished, so can get rid of
 	 * filesystem.
 	 *
 	 * XXX protocol allows a server can to change hostkeys during the
 	 *     connection at rekey time that could trigger a hostkeys update
 	 *     but AFAIK no implementations support this. Could improve by
 	 *     forcing known_hosts to be read-only or via unveil(2).
 	 */
 	if (options.num_local_forwards != 0 ||
 	    options.num_remote_forwards != 0 ||
 	    options.num_permitted_remote_opens != 0 ||
 	    options.enable_escape_commandline != 0) {
 		/* rfwd needs inet */
 		debug("pledge: network");
 		if (pledge("stdio unix inet dns proc tty", NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 	} else if (options.forward_agent != 0) {
 		/* agent forwarding needs to open $SSH_AUTH_SOCK at will */
 		debug("pledge: agent");
 		if (pledge("stdio unix proc tty", NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 	} else {
 		debug("pledge: fork");
 		if (pledge("stdio proc tty", NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 	}
 	/* XXX further things to do:
 	 *
 	 * - might be able to get rid of proc if we kill ~^Z
 	 * - ssh -N (no session)
 	 * - stdio forwarding
 	 * - sessions without tty
 	 */
 }
 
 static void
 process_cmdline(struct ssh *ssh)
 {
 	void (*handler)(int);
 	char *s, *cmd;
 	int ok, delete = 0, local = 0, remote = 0, dynamic = 0;
 	struct Forward fwd;
 
 	memset(&fwd, 0, sizeof(fwd));
 
 	leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 	handler = ssh_signal(SIGINT, SIG_IGN);
 	cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
 	if (s == NULL)
 		goto out;
 	while (isspace((u_char)*s))
 		s++;
 	if (*s == '-')
 		s++;	/* Skip cmdline '-', if any */
 	if (*s == '\0')
 		goto out;
 
 	if (*s == 'h' || *s == 'H' || *s == '?') {
 		logit("Commands:");
 		logit("      -L[bind_address:]port:host:hostport    "
 		    "Request local forward");
 		logit("      -R[bind_address:]port:host:hostport    "
 		    "Request remote forward");
 		logit("      -D[bind_address:]port                  "
 		    "Request dynamic forward");
 		logit("      -KL[bind_address:]port                 "
 		    "Cancel local forward");
 		logit("      -KR[bind_address:]port                 "
 		    "Cancel remote forward");
 		logit("      -KD[bind_address:]port                 "
 		    "Cancel dynamic forward");
 		if (!options.permit_local_command)
 			goto out;
 		logit("      !args                                  "
 		    "Execute local command");
 		goto out;
 	}
 
 	if (*s == '!' && options.permit_local_command) {
 		s++;
 		ssh_local_cmd(s);
 		goto out;
 	}
 
 	if (*s == 'K') {
 		delete = 1;
 		s++;
 	}
 	if (*s == 'L')
 		local = 1;
 	else if (*s == 'R')
 		remote = 1;
 	else if (*s == 'D')
 		dynamic = 1;
 	else {
 		logit("Invalid command.");
 		goto out;
 	}
 
 	while (isspace((u_char)*++s))
 		;
 
 	/* XXX update list of forwards in options */
 	if (delete) {
 		/* We pass 1 for dynamicfwd to restrict to 1 or 2 fields. */
 		if (!parse_forward(&fwd, s, 1, 0)) {
 			logit("Bad forwarding close specification.");
 			goto out;
 		}
 		if (remote)
 			ok = channel_request_rforward_cancel(ssh, &fwd) == 0;
 		else if (dynamic)
 			ok = channel_cancel_lport_listener(ssh, &fwd,
 			    0, &options.fwd_opts) > 0;
 		else
 			ok = channel_cancel_lport_listener(ssh, &fwd,
 			    CHANNEL_CANCEL_PORT_STATIC,
 			    &options.fwd_opts) > 0;
 		if (!ok) {
 			logit("Unknown port forwarding.");
 			goto out;
 		}
 		logit("Canceled forwarding.");
 	} else {
 		/* -R specs can be both dynamic or not, so check both. */
 		if (remote) {
 			if (!parse_forward(&fwd, s, 0, remote) &&
 			    !parse_forward(&fwd, s, 1, remote)) {
 				logit("Bad remote forwarding specification.");
 				goto out;
 			}
 		} else if (!parse_forward(&fwd, s, dynamic, remote)) {
 			logit("Bad local forwarding specification.");
 			goto out;
 		}
 		if (local || dynamic) {
 			if (!channel_setup_local_fwd_listener(ssh, &fwd,
 			    &options.fwd_opts)) {
 				logit("Port forwarding failed.");
 				goto out;
 			}
 		} else {
 			if (channel_request_remote_forwarding(ssh, &fwd) < 0) {
 				logit("Port forwarding failed.");
 				goto out;
 			}
 		}
 		logit("Forwarding port.");
 	}
 
 out:
 	ssh_signal(SIGINT, handler);
 	enter_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 	free(cmd);
 	free(fwd.listen_host);
 	free(fwd.listen_path);
 	free(fwd.connect_host);
 	free(fwd.connect_path);
 }
 
 /* reasons to suppress output of an escape command in help output */
 #define SUPPRESS_NEVER		0	/* never suppress, always show */
 #define SUPPRESS_MUXCLIENT	1	/* don't show in mux client sessions */
 #define SUPPRESS_MUXMASTER	2	/* don't show in mux master sessions */
 #define SUPPRESS_SYSLOG		4	/* don't show when logging to syslog */
 #define SUPPRESS_NOCMDLINE	8	/* don't show when cmdline disabled*/
 struct escape_help_text {
 	const char *cmd;
 	const char *text;
 	unsigned int flags;
 };
 static struct escape_help_text esc_txt[] = {
     {".",  "terminate session", SUPPRESS_MUXMASTER},
     {".",  "terminate connection (and any multiplexed sessions)",
 	SUPPRESS_MUXCLIENT},
     {"B",  "send a BREAK to the remote system", SUPPRESS_NEVER},
     {"C",  "open a command line", SUPPRESS_MUXCLIENT|SUPPRESS_NOCMDLINE},
     {"R",  "request rekey", SUPPRESS_NEVER},
     {"V/v",  "decrease/increase verbosity (LogLevel)", SUPPRESS_MUXCLIENT},
     {"^Z", "suspend ssh", SUPPRESS_MUXCLIENT},
     {"#",  "list forwarded connections", SUPPRESS_NEVER},
     {"&",  "background ssh (when waiting for connections to terminate)",
 	SUPPRESS_MUXCLIENT},
     {"?", "this message", SUPPRESS_NEVER},
 };
 
 static void
 print_escape_help(struct sshbuf *b, int escape_char, int mux_client,
     int using_stderr)
 {
 	unsigned int i, suppress_flags;
 	int r;
 
 	if ((r = sshbuf_putf(b,
 	    "%c?\r\nSupported escape sequences:\r\n", escape_char)) != 0)
 		fatal_fr(r, "sshbuf_putf");
 
 	suppress_flags =
 	    (mux_client ? SUPPRESS_MUXCLIENT : 0) |
 	    (mux_client ? 0 : SUPPRESS_MUXMASTER) |
 	    (using_stderr ? 0 : SUPPRESS_SYSLOG) |
 	    (options.enable_escape_commandline == 0 ? SUPPRESS_NOCMDLINE : 0);
 
 	for (i = 0; i < sizeof(esc_txt)/sizeof(esc_txt[0]); i++) {
 		if (esc_txt[i].flags & suppress_flags)
 			continue;
 		if ((r = sshbuf_putf(b, " %c%-3s - %s\r\n",
 		    escape_char, esc_txt[i].cmd, esc_txt[i].text)) != 0)
 			fatal_fr(r, "sshbuf_putf");
 	}
 
 	if ((r = sshbuf_putf(b,
 	    " %c%c   - send the escape character by typing it twice\r\n"
 	    "(Note that escapes are only recognized immediately after "
 	    "newline.)\r\n", escape_char, escape_char)) != 0)
 		fatal_fr(r, "sshbuf_putf");
 }
 
 /*
  * Process the characters one by one.
  */
 static int
 process_escapes(struct ssh *ssh, Channel *c,
     struct sshbuf *bin, struct sshbuf *bout, struct sshbuf *berr,
     char *buf, int len)
 {
 	pid_t pid;
 	int r, bytes = 0;
 	u_int i;
 	u_char ch;
 	char *s;
 	struct escape_filter_ctx *efc;
 
 	if (c == NULL || c->filter_ctx == NULL || len <= 0)
 		return 0;
 
 	efc = (struct escape_filter_ctx *)c->filter_ctx;
 
 	for (i = 0; i < (u_int)len; i++) {
 		/* Get one character at a time. */
 		ch = buf[i];
 
 		if (efc->escape_pending) {
 			/* We have previously seen an escape character. */
 			/* Clear the flag now. */
 			efc->escape_pending = 0;
 
 			/* Process the escaped character. */
 			switch (ch) {
 			case '.':
 				/* Terminate the connection. */
 				if ((r = sshbuf_putf(berr, "%c.\r\n",
 				    efc->escape_char)) != 0)
 					fatal_fr(r, "sshbuf_putf");
 				if (c && c->ctl_chan != -1) {
 					channel_force_close(ssh, c, 1);
 					return 0;
 				} else
 					quit_pending = 1;
 				return -1;
 
 			case 'Z' - 64:
 				/* XXX support this for mux clients */
 				if (c && c->ctl_chan != -1) {
 					char b[16];
  noescape:
 					if (ch == 'Z' - 64)
 						snprintf(b, sizeof b, "^Z");
 					else
 						snprintf(b, sizeof b, "%c", ch);
 					if ((r = sshbuf_putf(berr,
 					    "%c%s escape not available to "
 					    "multiplexed sessions\r\n",
 					    efc->escape_char, b)) != 0)
 						fatal_fr(r, "sshbuf_putf");
 					continue;
 				}
 				/* Suspend the program. Inform the user */
 				if ((r = sshbuf_putf(berr,
 				    "%c^Z [suspend ssh]\r\n",
 				    efc->escape_char)) != 0)
 					fatal_fr(r, "sshbuf_putf");
 
 				/* Restore terminal modes and suspend. */
 				client_suspend_self(bin, bout, berr);
 
 				/* We have been continued. */
 				continue;
 
 			case 'B':
 				if ((r = sshbuf_putf(berr,
 				    "%cB\r\n", efc->escape_char)) != 0)
 					fatal_fr(r, "sshbuf_putf");
 				channel_request_start(ssh, c->self, "break", 0);
 				if ((r = sshpkt_put_u32(ssh, 1000)) != 0 ||
 				    (r = sshpkt_send(ssh)) != 0)
 					fatal_fr(r, "send packet");
 				continue;
 
 			case 'R':
 				if (ssh->compat & SSH_BUG_NOREKEY)
 					logit("Server does not "
 					    "support re-keying");
 				else
 					need_rekeying = 1;
 				continue;
 
 			case 'V':
 				/* FALLTHROUGH */
 			case 'v':
 				if (c && c->ctl_chan != -1)
 					goto noescape;
 				if (!log_is_on_stderr()) {
 					if ((r = sshbuf_putf(berr,
 					    "%c%c [Logging to syslog]\r\n",
 					    efc->escape_char, ch)) != 0)
 						fatal_fr(r, "sshbuf_putf");
 					continue;
 				}
 				if (ch == 'V' && options.log_level >
 				    SYSLOG_LEVEL_QUIET)
 					log_change_level(--options.log_level);
 				if (ch == 'v' && options.log_level <
 				    SYSLOG_LEVEL_DEBUG3)
 					log_change_level(++options.log_level);
 				if ((r = sshbuf_putf(berr,
 				    "%c%c [LogLevel %s]\r\n",
 				    efc->escape_char, ch,
 				    log_level_name(options.log_level))) != 0)
 					fatal_fr(r, "sshbuf_putf");
 				continue;
 
 			case '&':
 				if (c->ctl_chan != -1)
 					goto noescape;
 				/*
 				 * Detach the program (continue to serve
 				 * connections, but put in background and no
 				 * more new connections).
 				 */
 				/* Restore tty modes. */
 				leave_raw_mode(
 				    options.request_tty == REQUEST_TTY_FORCE);
 
 				/* Stop listening for new connections. */
 				channel_stop_listening(ssh);
 
 				if ((r = sshbuf_putf(berr, "%c& "
 				    "[backgrounded]\n", efc->escape_char)) != 0)
 					fatal_fr(r, "sshbuf_putf");
 
 				/* Fork into background. */
 				pid = fork();
 				if (pid == -1) {
 					error("fork: %.100s", strerror(errno));
 					continue;
 				}
 				if (pid != 0) {	/* This is the parent. */
 					/* The parent just exits. */
 					exit(0);
 				}
 				/* The child continues serving connections. */
 				/* fake EOF on stdin */
 				if ((r = sshbuf_put_u8(bin, 4)) != 0)
 					fatal_fr(r, "sshbuf_put_u8");
 				return -1;
 			case '?':
 				print_escape_help(berr, efc->escape_char,
 				    (c && c->ctl_chan != -1),
 				    log_is_on_stderr());
 				continue;
 
 			case '#':
 				if ((r = sshbuf_putf(berr, "%c#\r\n",
 				    efc->escape_char)) != 0)
 					fatal_fr(r, "sshbuf_putf");
 				s = channel_open_message(ssh);
 				if ((r = sshbuf_put(berr, s, strlen(s))) != 0)
 					fatal_fr(r, "sshbuf_put");
 				free(s);
 				continue;
 
 			case 'C':
 				if (c && c->ctl_chan != -1)
 					goto noescape;
 				if (options.enable_escape_commandline == 0) {
 					if ((r = sshbuf_putf(berr,
 					    "commandline disabled\r\n")) != 0)
 						fatal_fr(r, "sshbuf_putf");
 					continue;
 				}
 				process_cmdline(ssh);
 				continue;
 
 			default:
 				if (ch != efc->escape_char) {
 					if ((r = sshbuf_put_u8(bin,
 					    efc->escape_char)) != 0)
 						fatal_fr(r, "sshbuf_put_u8");
 					bytes++;
 				}
 				/* Escaped characters fall through here */
 				break;
 			}
 		} else {
 			/*
 			 * The previous character was not an escape char.
 			 * Check if this is an escape.
 			 */
 			if (last_was_cr && ch == efc->escape_char) {
 				/*
 				 * It is. Set the flag and continue to
 				 * next character.
 				 */
 				efc->escape_pending = 1;
 				continue;
 			}
 		}
 
 		/*
 		 * Normal character.  Record whether it was a newline,
 		 * and append it to the buffer.
 		 */
 		last_was_cr = (ch == '\r' || ch == '\n');
 		if ((r = sshbuf_put_u8(bin, ch)) != 0)
 			fatal_fr(r, "sshbuf_put_u8");
 		bytes++;
 	}
 	return bytes;
 }
 
 /*
  * Get packets from the connection input buffer, and process them as long as
  * there are packets available.
  *
  * Any unknown packets received during the actual
  * session cause the session to terminate.  This is
  * intended to make debugging easier since no
  * confirmations are sent.  Any compatible protocol
  * extensions must be negotiated during the
  * preparatory phase.
  */
 
 static void
 client_process_buffered_input_packets(struct ssh *ssh)
 {
 	ssh_dispatch_run_fatal(ssh, DISPATCH_NONBLOCK, &quit_pending);
 }
 
 /* scan buf[] for '~' before sending data to the peer */
 
 /* Helper: allocate a new escape_filter_ctx and fill in its escape char */
 void *
 client_new_escape_filter_ctx(int escape_char)
 {
 	struct escape_filter_ctx *ret;
 
 	ret = xcalloc(1, sizeof(*ret));
 	ret->escape_pending = 0;
 	ret->escape_char = escape_char;
 	return (void *)ret;
 }
 
 /* Free the escape filter context on channel free */
 void
 client_filter_cleanup(struct ssh *ssh, int cid, void *ctx)
 {
 	free(ctx);
 }
 
 int
 client_simple_escape_filter(struct ssh *ssh, Channel *c, char *buf, int len)
 {
 	if (c->extended_usage != CHAN_EXTENDED_WRITE)
 		return 0;
 
 	return process_escapes(ssh, c, c->input, c->output, c->extended,
 	    buf, len);
 }
 
 static void
 client_channel_closed(struct ssh *ssh, int id, int force, void *arg)
 {
 	channel_cancel_cleanup(ssh, id);
 	session_closed = 1;
 	leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 }
 
 /*
  * Implements the interactive session with the server.  This is called after
  * the user has been authenticated, and a command has been started on the
  * remote host.  If escape_char != SSH_ESCAPECHAR_NONE, it is the character
  * used as an escape character for terminating or suspending the session.
  */
 int
 client_loop(struct ssh *ssh, int have_pty, int escape_char_arg,
     int ssh2_chan_id)
 {
 	struct pollfd *pfd = NULL;
 	u_int npfd_alloc = 0, npfd_active = 0;
 	double start_time, total_time;
 	int channel_did_enqueue = 0, r, len;
 	u_int64_t ibytes, obytes;
 	int conn_in_ready, conn_out_ready;
 	sigset_t bsigset, osigset;
 
 	debug("Entering interactive session.");
 	session_ident = ssh2_chan_id;
 
 	if (options.control_master &&
 	    !option_clear_or_none(options.control_path)) {
 		debug("pledge: id");
 		if (pledge("stdio rpath wpath cpath unix inet dns recvfd sendfd proc exec id tty",
 		    NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 
 	} else if (options.forward_x11 || options.permit_local_command) {
 		debug("pledge: exec");
 		if (pledge("stdio rpath wpath cpath unix inet dns proc exec tty",
 		    NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 
 	} else if (options.update_hostkeys) {
 		debug("pledge: filesystem");
 		if (pledge("stdio rpath wpath cpath unix inet dns proc tty",
 		    NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 
 	} else if (!option_clear_or_none(options.proxy_command) ||
 	    options.fork_after_authentication) {
 		debug("pledge: proc");
 		if (pledge("stdio cpath unix inet dns proc tty", NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 
 	} else {
 		debug("pledge: network");
 		if (pledge("stdio unix inet dns proc tty", NULL) == -1)
 			fatal_f("pledge(): %s", strerror(errno));
 	}
 
 	/* might be able to tighten now */
 	client_repledge();
 
 	start_time = monotime_double();
 
 	/* Initialize variables. */
 	last_was_cr = 1;
 	exit_status = -1;
 	connection_in = ssh_packet_get_connection_in(ssh);
 	connection_out = ssh_packet_get_connection_out(ssh);
 
 	quit_pending = 0;
 
 	/* Initialize buffer. */
 	if ((stderr_buffer = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 
 	client_init_dispatch(ssh);
 
 	/*
 	 * Set signal handlers, (e.g. to restore non-blocking mode)
 	 * but don't overwrite SIG_IGN, matches behaviour from rsh(1)
 	 */
 	if (ssh_signal(SIGHUP, SIG_IGN) != SIG_IGN)
 		ssh_signal(SIGHUP, signal_handler);
 	if (ssh_signal(SIGINT, SIG_IGN) != SIG_IGN)
 		ssh_signal(SIGINT, signal_handler);
 	if (ssh_signal(SIGQUIT, SIG_IGN) != SIG_IGN)
 		ssh_signal(SIGQUIT, signal_handler);
 	if (ssh_signal(SIGTERM, SIG_IGN) != SIG_IGN)
 		ssh_signal(SIGTERM, signal_handler);
 	ssh_signal(SIGWINCH, window_change_handler);
 
 	if (have_pty)
 		enter_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 
 	if (session_ident != -1) {
 		if (escape_char_arg != SSH_ESCAPECHAR_NONE) {
 			channel_register_filter(ssh, session_ident,
 			    client_simple_escape_filter, NULL,
 			    client_filter_cleanup,
 			    client_new_escape_filter_ctx(
 			    escape_char_arg));
 		}
 		channel_register_cleanup(ssh, session_ident,
 		    client_channel_closed, 0);
 	}
 
 	schedule_server_alive_check();
 
 	if (sigemptyset(&bsigset) == -1 ||
 	    sigaddset(&bsigset, SIGHUP) == -1 ||
 	    sigaddset(&bsigset, SIGINT) == -1 ||
 	    sigaddset(&bsigset, SIGQUIT) == -1 ||
 	    sigaddset(&bsigset, SIGTERM) == -1)
 		error_f("bsigset setup: %s", strerror(errno));
 
 	/* Main loop of the client for the interactive session mode. */
 	while (!quit_pending) {
 		channel_did_enqueue = 0;
 
 		/* Process buffered packets sent by the server. */
 		client_process_buffered_input_packets(ssh);
 
 		if (session_closed && !channel_still_open(ssh))
 			break;
 
 		if (ssh_packet_is_rekeying(ssh)) {
 			debug("rekeying in progress");
 		} else if (need_rekeying) {
 			/* manual rekey request */
 			debug("need rekeying");
 			if ((r = kex_start_rekex(ssh)) != 0)
 				fatal_fr(r, "kex_start_rekex");
 			need_rekeying = 0;
 		} else {
 			/*
 			 * Make packets from buffered channel data, and
 			 * enqueue them for sending to the server.
 			 */
 			if (ssh_packet_not_very_much_data_to_write(ssh))
 				channel_did_enqueue = channel_output_poll(ssh);
 
 			/*
 			 * Check if the window size has changed, and buffer a
 			 * message about it to the server if so.
 			 */
 			client_check_window_change(ssh);
 		}
 		/*
 		 * Wait until we have something to do (something becomes
 		 * available on one of the descriptors).
 		 */
 		if (sigprocmask(SIG_BLOCK, &bsigset, &osigset) == -1)
 			error_f("bsigset sigprocmask: %s", strerror(errno));
 		if (quit_pending)
 			break;
 		client_wait_until_can_do_something(ssh, &pfd, &npfd_alloc,
 		    &npfd_active, channel_did_enqueue, &osigset,
 		    &conn_in_ready, &conn_out_ready);
 		if (sigprocmask(SIG_UNBLOCK, &bsigset, &osigset) == -1)
 			error_f("osigset sigprocmask: %s", strerror(errno));
 
 		if (quit_pending)
 			break;
 
 		/* Do channel operations. */
 		channel_after_poll(ssh, pfd, npfd_active);
 
 		/* Buffer input from the connection.  */
 		if (conn_in_ready)
 			client_process_net_input(ssh);
 
 		if (quit_pending)
 			break;
 
 		/* A timeout may have triggered rekeying */
 		if ((r = ssh_packet_check_rekey(ssh)) != 0)
 			fatal_fr(r, "cannot start rekeying");
 
 		/*
 		 * Send as much buffered packet data as possible to the
 		 * sender.
 		 */
 		if (conn_out_ready) {
 			if ((r = ssh_packet_write_poll(ssh)) != 0) {
 				sshpkt_fatal(ssh, r,
 				    "%s: ssh_packet_write_poll", __func__);
 			}
 		}
 
 		/*
 		 * If we are a backgrounded control master, and the
 		 * timeout has expired without any active client
 		 * connections, then quit.
 		 */
 		if (control_persist_exit_time > 0) {
 			if (monotime() >= control_persist_exit_time) {
 				debug("ControlPersist timeout expired");
 				break;
 			}
 		}
 	}
 	free(pfd);
 
 	/* Terminate the session. */
 
 	/* Stop watching for window change. */
 	ssh_signal(SIGWINCH, SIG_DFL);
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_DISCONNECT)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, SSH2_DISCONNECT_BY_APPLICATION)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "disconnected by user")) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "")) != 0 ||	/* language tag */
 	    (r = sshpkt_send(ssh)) != 0 ||
 	    (r = ssh_packet_write_wait(ssh)) != 0)
 		fatal_fr(r, "send disconnect");
 
 	channel_free_all(ssh);
 
 	if (have_pty)
 		leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 
 	/*
 	 * If there was no shell or command requested, there will be no remote
 	 * exit status to be returned.  In that case, clear error code if the
 	 * connection was deliberately terminated at this end.
 	 */
 	if (options.session_type == SESSION_TYPE_NONE &&
 	    received_signal == SIGTERM) {
 		received_signal = 0;
 		exit_status = 0;
 	}
 
 	if (received_signal) {
 		verbose("Killed by signal %d.", (int) received_signal);
 		cleanup_exit(255);
 	}
 
 	/*
 	 * In interactive mode (with pseudo tty) display a message indicating
 	 * that the connection has been closed.
 	 */
 	if (have_pty && options.log_level >= SYSLOG_LEVEL_INFO)
 		quit_message("Connection to %s closed.", host);
 
 	/* Output any buffered data for stderr. */
 	if (sshbuf_len(stderr_buffer) > 0) {
 		len = atomicio(vwrite, fileno(stderr),
 		    (u_char *)sshbuf_ptr(stderr_buffer),
 		    sshbuf_len(stderr_buffer));
 		if (len < 0 || (u_int)len != sshbuf_len(stderr_buffer))
 			error("Write failed flushing stderr buffer.");
 		else if ((r = sshbuf_consume(stderr_buffer, len)) != 0)
 			fatal_fr(r, "sshbuf_consume");
 	}
 
 	/* Clear and free any buffers. */
 	sshbuf_free(stderr_buffer);
 
 	/* Report bytes transferred, and transfer rates. */
 	total_time = monotime_double() - start_time;
 	ssh_packet_get_bytes(ssh, &ibytes, &obytes);
 	verbose("Transferred: sent %llu, received %llu bytes, in %.1f seconds",
 	    (unsigned long long)obytes, (unsigned long long)ibytes, total_time);
 	if (total_time > 0)
 		verbose("Bytes per second: sent %.1f, received %.1f",
 		    obytes / total_time, ibytes / total_time);
 	/* Return the exit status of the program. */
 	debug("Exit status %d", exit_status);
 	return exit_status;
 }
 
 /*********/
 
 static Channel *
 client_request_forwarded_tcpip(struct ssh *ssh, const char *request_type,
     int rchan, u_int rwindow, u_int rmaxpack)
 {
 	Channel *c = NULL;
 	struct sshbuf *b = NULL;
 	char *listen_address, *originator_address;
 	u_int listen_port, originator_port;
 	int r;
 
 	/* Get rest of the packet */
 	if ((r = sshpkt_get_cstring(ssh, &listen_address, NULL)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &listen_port)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &originator_address, NULL)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &originator_port)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		fatal_fr(r, "parse packet");
 
 	debug_f("listen %s port %d, originator %s port %d",
 	    listen_address, listen_port, originator_address, originator_port);
 
 	if (listen_port > 0xffff)
 		error_f("invalid listen port");
 	else if (originator_port > 0xffff)
 		error_f("invalid originator port");
 	else {
 		c = channel_connect_by_listen_address(ssh,
 		    listen_address, listen_port, "forwarded-tcpip",
 		    originator_address);
 	}
 
 	if (c != NULL && c->type == SSH_CHANNEL_MUX_CLIENT) {
 		if ((b = sshbuf_new()) == NULL) {
 			error_f("alloc reply");
 			goto out;
 		}
 		/* reconstruct and send to muxclient */
 		if ((r = sshbuf_put_u8(b, 0)) != 0 ||	/* padlen */
 		    (r = sshbuf_put_u8(b, SSH2_MSG_CHANNEL_OPEN)) != 0 ||
 		    (r = sshbuf_put_cstring(b, request_type)) != 0 ||
 		    (r = sshbuf_put_u32(b, rchan)) != 0 ||
 		    (r = sshbuf_put_u32(b, rwindow)) != 0 ||
 		    (r = sshbuf_put_u32(b, rmaxpack)) != 0 ||
 		    (r = sshbuf_put_cstring(b, listen_address)) != 0 ||
 		    (r = sshbuf_put_u32(b, listen_port)) != 0 ||
 		    (r = sshbuf_put_cstring(b, originator_address)) != 0 ||
 		    (r = sshbuf_put_u32(b, originator_port)) != 0 ||
 		    (r = sshbuf_put_stringb(c->output, b)) != 0) {
 			error_fr(r, "compose for muxclient");
 			goto out;
 		}
 	}
 
  out:
 	sshbuf_free(b);
 	free(originator_address);
 	free(listen_address);
 	return c;
 }
 
 static Channel *
 client_request_forwarded_streamlocal(struct ssh *ssh,
     const char *request_type, int rchan)
 {
 	Channel *c = NULL;
 	char *listen_path;
 	int r;
 
 	/* Get the remote path. */
 	if ((r = sshpkt_get_cstring(ssh, &listen_path, NULL)) != 0 ||
 	    (r = sshpkt_get_string(ssh, NULL, NULL)) != 0 ||	/* reserved */
 	    (r = sshpkt_get_end(ssh)) != 0)
 		fatal_fr(r, "parse packet");
 
 	debug_f("request: %s", listen_path);
 
 	c = channel_connect_by_listen_path(ssh, listen_path,
 	    "forwarded-streamlocal@openssh.com", "forwarded-streamlocal");
 	free(listen_path);
 	return c;
 }
 
 static Channel *
 client_request_x11(struct ssh *ssh, const char *request_type, int rchan)
 {
 	Channel *c = NULL;
 	char *originator;
 	u_int originator_port;
 	int r, sock;
 
 	if (!options.forward_x11) {
 		error("Warning: ssh server tried X11 forwarding.");
 		error("Warning: this is probably a break-in attempt by a "
 		    "malicious server.");
 		return NULL;
 	}
 	if (x11_refuse_time != 0 && monotime() >= x11_refuse_time) {
 		verbose("Rejected X11 connection after ForwardX11Timeout "
 		    "expired");
 		return NULL;
 	}
 	if ((r = sshpkt_get_cstring(ssh, &originator, NULL)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &originator_port)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		fatal_fr(r, "parse packet");
 	/* XXX check permission */
 	/* XXX range check originator port? */
 	debug("client_request_x11: request from %s %u", originator,
 	    originator_port);
 	free(originator);
 	sock = x11_connect_display(ssh);
 	if (sock < 0)
 		return NULL;
 	c = channel_new(ssh, "x11-connection",
 	    SSH_CHANNEL_X11_OPEN, sock, sock, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
 	c->force_drain = 1;
 	return c;
 }
 
 static Channel *
 client_request_agent(struct ssh *ssh, const char *request_type, int rchan)
 {
 	Channel *c = NULL;
 	int r, sock;
 
 	if (!options.forward_agent) {
 		error("Warning: ssh server tried agent forwarding.");
 		error("Warning: this is probably a break-in attempt by a "
 		    "malicious server.");
 		return NULL;
 	}
 	if (forward_agent_sock_path == NULL) {
 		r = ssh_get_authentication_socket(&sock);
 	} else {
 		r = ssh_get_authentication_socket_path(forward_agent_sock_path, &sock);
 	}
 	if (r != 0) {
 		if (r != SSH_ERR_AGENT_NOT_PRESENT)
 			debug_fr(r, "ssh_get_authentication_socket");
 		return NULL;
 	}
 	if ((r = ssh_agent_bind_hostkey(sock, ssh->kex->initial_hostkey,
 	    ssh->kex->session_id, ssh->kex->initial_sig, 1)) == 0)
 		debug_f("bound agent to hostkey");
 	else
 		debug2_fr(r, "ssh_agent_bind_hostkey");
 
 	c = channel_new(ssh, "agent-connection",
 	    SSH_CHANNEL_OPEN, sock, sock, -1,
 	    CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
 	    "authentication agent connection", 1);
 	c->force_drain = 1;
 	return c;
 }
 
 char *
 client_request_tun_fwd(struct ssh *ssh, int tun_mode,
     int local_tun, int remote_tun, channel_open_fn *cb, void *cbctx)
 {
 	Channel *c;
 	int r, fd;
 	char *ifname = NULL;
 
 	if (tun_mode == SSH_TUNMODE_NO)
 		return 0;
 
 	debug("Requesting tun unit %d in mode %d", local_tun, tun_mode);
 
 	/* Open local tunnel device */
 	if ((fd = tun_open(local_tun, tun_mode, &ifname)) == -1) {
 		error("Tunnel device open failed.");
 		return NULL;
 	}
 	debug("Tunnel forwarding using interface %s", ifname);
 
 	c = channel_new(ssh, "tun-connection", SSH_CHANNEL_OPENING, fd, fd, -1,
 	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
 	c->datagram = 1;
 
 #if defined(SSH_TUN_FILTER)
 	if (options.tun_open == SSH_TUNMODE_POINTOPOINT)
 		channel_register_filter(ssh, c->self, sys_tun_infilter,
 		    sys_tun_outfilter, NULL, NULL);
 #endif
 
 	if (cb != NULL)
 		channel_register_open_confirm(ssh, c->self, cb, cbctx);
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_OPEN)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "tun@openssh.com")) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->self)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_window_max)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->local_maxpacket)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, tun_mode)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, remote_tun)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: send reply", __func__);
 
 	return ifname;
 }
 
 /* XXXX move to generic input handler */
 static int
 client_input_channel_open(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = NULL;
 	char *ctype = NULL;
 	int r;
 	u_int rchan;
 	size_t len;
 	u_int rmaxpack, rwindow;
 
 	if ((r = sshpkt_get_cstring(ssh, &ctype, &len)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &rchan)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &rwindow)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &rmaxpack)) != 0)
 		goto out;
 
 	debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
 	    ctype, rchan, rwindow, rmaxpack);
 
 	if (strcmp(ctype, "forwarded-tcpip") == 0) {
 		c = client_request_forwarded_tcpip(ssh, ctype, rchan, rwindow,
 		    rmaxpack);
 	} else if (strcmp(ctype, "forwarded-streamlocal@openssh.com") == 0) {
 		c = client_request_forwarded_streamlocal(ssh, ctype, rchan);
 	} else if (strcmp(ctype, "x11") == 0) {
 		c = client_request_x11(ssh, ctype, rchan);
 	} else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
 		c = client_request_agent(ssh, ctype, rchan);
 	}
 	if (c != NULL && c->type == SSH_CHANNEL_MUX_CLIENT) {
 		debug3("proxied to downstream: %s", ctype);
 	} else if (c != NULL) {
 		debug("confirm %s", ctype);
 		c->remote_id = rchan;
 		c->have_remote_id = 1;
 		c->remote_window = rwindow;
 		c->remote_maxpacket = rmaxpack;
 		if (c->type != SSH_CHANNEL_CONNECTING) {
 			if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->self)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->local_window)) != 0 ||
 			    (r = sshpkt_put_u32(ssh, c->local_maxpacket)) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0)
 				sshpkt_fatal(ssh, r, "%s: send reply", __func__);
 		}
 	} else {
 		debug("failure %s", ctype);
 		if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_OPEN_FAILURE)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, rchan)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh, "open failed")) != 0 ||
 		    (r = sshpkt_put_cstring(ssh, "")) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			sshpkt_fatal(ssh, r, "%s: send failure", __func__);
 	}
 	r = 0;
  out:
 	free(ctype);
 	return r;
 }
 
 static int
 client_input_channel_req(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Channel *c = NULL;
 	char *rtype = NULL;
 	u_char reply;
 	u_int id, exitval;
 	int r, success = 0;
 
 	if ((r = sshpkt_get_u32(ssh, &id)) != 0)
 		return r;
 	if (id <= INT_MAX)
 		c = channel_lookup(ssh, id);
 	if (channel_proxy_upstream(c, type, seq, ssh))
 		return 0;
 	if ((r = sshpkt_get_cstring(ssh, &rtype, NULL)) != 0 ||
 	    (r = sshpkt_get_u8(ssh, &reply)) != 0)
 		goto out;
 
 	debug("client_input_channel_req: channel %u rtype %s reply %d",
 	    id, rtype, reply);
 
 	if (c == NULL) {
 		error("client_input_channel_req: channel %d: "
 		    "unknown channel", id);
 	} else if (strcmp(rtype, "eow@openssh.com") == 0) {
 		if ((r = sshpkt_get_end(ssh)) != 0)
 			goto out;
 		chan_rcvd_eow(ssh, c);
 	} else if (strcmp(rtype, "exit-status") == 0) {
 		if ((r = sshpkt_get_u32(ssh, &exitval)) != 0)
 			goto out;
 		if (c->ctl_chan != -1) {
 			mux_exit_message(ssh, c, exitval);
 			success = 1;
 		} else if ((int)id == session_ident) {
 			/* Record exit value of local session */
 			success = 1;
 			exit_status = exitval;
 		} else {
 			/* Probably for a mux channel that has already closed */
 			debug_f("no sink for exit-status on channel %d",
 			    id);
 		}
 		if ((r = sshpkt_get_end(ssh)) != 0)
 			goto out;
 	}
 	if (reply && c != NULL && !(c->flags & CHAN_CLOSE_SENT)) {
 		if (!c->have_remote_id)
 			fatal_f("channel %d: no remote_id", c->self);
 		if ((r = sshpkt_start(ssh, success ?
 		    SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			sshpkt_fatal(ssh, r, "%s: send failure", __func__);
 	}
 	r = 0;
  out:
 	free(rtype);
 	return r;
 }
 
 struct hostkeys_update_ctx {
 	/* The hostname and (optionally) IP address string for the server */
 	char *host_str, *ip_str;
 
 	/*
 	 * Keys received from the server and a flag for each indicating
 	 * whether they already exist in known_hosts.
 	 * keys_match is filled in by hostkeys_find() and later (for new
 	 * keys) by client_global_hostkeys_prove_confirm().
 	 */
 	struct sshkey **keys;
 	u_int *keys_match;	/* mask of HKF_MATCH_* from hostfile.h */
 	int *keys_verified;	/* flag for new keys verified by server */
 	size_t nkeys, nnew, nincomplete; /* total, new keys, incomplete match */
 
 	/*
 	 * Keys that are in known_hosts, but were not present in the update
 	 * from the server (i.e. scheduled to be deleted).
 	 * Filled in by hostkeys_find().
 	 */
 	struct sshkey **old_keys;
 	size_t nold;
 
 	/* Various special cases. */
 	int complex_hostspec;	/* wildcard or manual pattern-list host name */
 	int ca_available;	/* saw CA key for this host */
 	int old_key_seen;	/* saw old key with other name/addr */
 	int other_name_seen;	/* saw key with other name/addr */
 };
 
 static void
 hostkeys_update_ctx_free(struct hostkeys_update_ctx *ctx)
 {
 	size_t i;
 
 	if (ctx == NULL)
 		return;
 	for (i = 0; i < ctx->nkeys; i++)
 		sshkey_free(ctx->keys[i]);
 	free(ctx->keys);
 	free(ctx->keys_match);
 	free(ctx->keys_verified);
 	for (i = 0; i < ctx->nold; i++)
 		sshkey_free(ctx->old_keys[i]);
 	free(ctx->old_keys);
 	free(ctx->host_str);
 	free(ctx->ip_str);
 	free(ctx);
 }
 
 /*
  * Returns non-zero if a known_hosts hostname list is not of a form that
  * can be handled by UpdateHostkeys. These include wildcard hostnames and
  * hostnames lists that do not follow the form host[,ip].
  */
 static int
 hostspec_is_complex(const char *hosts)
 {
 	char *cp;
 
 	/* wildcard */
 	if (strchr(hosts, '*') != NULL || strchr(hosts, '?') != NULL)
 		return 1;
 	/* single host/ip = ok */
 	if ((cp = strchr(hosts, ',')) == NULL)
 		return 0;
 	/* more than two entries on the line */
 	if (strchr(cp + 1, ',') != NULL)
 		return 1;
 	/* XXX maybe parse cp+1 and ensure it is an IP? */
 	return 0;
 }
 
 /* callback to search for ctx->keys in known_hosts */
 static int
 hostkeys_find(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx;
 	size_t i;
 	struct sshkey **tmp;
 
 	if (l->key == NULL)
 		return 0;
 	if (l->status != HKF_STATUS_MATCHED) {
 		/* Record if one of the keys appears on a non-matching line */
 		for (i = 0; i < ctx->nkeys; i++) {
 			if (sshkey_equal(l->key, ctx->keys[i])) {
 				ctx->other_name_seen = 1;
 				debug3_f("found %s key under different "
 				    "name/addr at %s:%ld",
 				    sshkey_ssh_name(ctx->keys[i]),
 				    l->path, l->linenum);
 				return 0;
 			}
 		}
 		return 0;
 	}
 	/* Don't proceed if revocation or CA markers are present */
 	/* XXX relax this */
 	if (l->marker != MRK_NONE) {
 		debug3_f("hostkeys file %s:%ld has CA/revocation marker",
 		    l->path, l->linenum);
 		ctx->complex_hostspec = 1;
 		return 0;
 	}
 
 	/* If CheckHostIP is enabled, then check for mismatched hostname/addr */
 	if (ctx->ip_str != NULL && strchr(l->hosts, ',') != NULL) {
 		if ((l->match & HKF_MATCH_HOST) == 0) {
 			/* Record if address matched a different hostname. */
 			ctx->other_name_seen = 1;
 			debug3_f("found address %s against different hostname "
 			    "at %s:%ld", ctx->ip_str, l->path, l->linenum);
 			return 0;
 		} else if ((l->match & HKF_MATCH_IP) == 0) {
 			/* Record if hostname matched a different address. */
 			ctx->other_name_seen = 1;
 			debug3_f("found hostname %s against different address "
 			    "at %s:%ld", ctx->host_str, l->path, l->linenum);
 		}
 	}
 
 	/*
 	 * UpdateHostkeys is skipped for wildcard host names and hostnames
 	 * that contain more than two entries (ssh never writes these).
 	 */
 	if (hostspec_is_complex(l->hosts)) {
 		debug3_f("hostkeys file %s:%ld complex host specification",
 		    l->path, l->linenum);
 		ctx->complex_hostspec = 1;
 		return 0;
 	}
 
 	/* Mark off keys we've already seen for this host */
 	for (i = 0; i < ctx->nkeys; i++) {
 		if (!sshkey_equal(l->key, ctx->keys[i]))
 			continue;
 		debug3_f("found %s key at %s:%ld",
 		    sshkey_ssh_name(ctx->keys[i]), l->path, l->linenum);
 		ctx->keys_match[i] |= l->match;
 		return 0;
 	}
 	/* This line contained a key that not offered by the server */
 	debug3_f("deprecated %s key at %s:%ld", sshkey_ssh_name(l->key),
 	    l->path, l->linenum);
 	if ((tmp = recallocarray(ctx->old_keys, ctx->nold, ctx->nold + 1,
 	    sizeof(*ctx->old_keys))) == NULL)
 		fatal_f("recallocarray failed nold = %zu", ctx->nold);
 	ctx->old_keys = tmp;
 	ctx->old_keys[ctx->nold++] = l->key;
 	l->key = NULL;
 
 	return 0;
 }
 
 /* callback to search for ctx->old_keys in known_hosts under other names */
 static int
 hostkeys_check_old(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx;
 	size_t i;
 	int hashed;
 
 	/* only care about lines that *don't* match the active host spec */
 	if (l->status == HKF_STATUS_MATCHED || l->key == NULL)
 		return 0;
 
 	hashed = l->match & (HKF_MATCH_HOST_HASHED|HKF_MATCH_IP_HASHED);
 	for (i = 0; i < ctx->nold; i++) {
 		if (!sshkey_equal(l->key, ctx->old_keys[i]))
 			continue;
 		debug3_f("found deprecated %s key at %s:%ld as %s",
 		    sshkey_ssh_name(ctx->old_keys[i]), l->path, l->linenum,
 		    hashed ? "[HASHED]" : l->hosts);
 		ctx->old_key_seen = 1;
 		break;
 	}
 	return 0;
 }
 
 /*
  * Check known_hosts files for deprecated keys under other names. Returns 0
  * on success or -1 on failure. Updates ctx->old_key_seen if deprecated keys
  * exist under names other than the active hostname/IP.
  */
 static int
 check_old_keys_othernames(struct hostkeys_update_ctx *ctx)
 {
 	size_t i;
 	int r;
 
 	debug2_f("checking for %zu deprecated keys", ctx->nold);
 	for (i = 0; i < options.num_user_hostfiles; i++) {
 		debug3_f("searching %s for %s / %s",
 		    options.user_hostfiles[i], ctx->host_str,
 		    ctx->ip_str ? ctx->ip_str : "(none)");
 		if ((r = hostkeys_foreach(options.user_hostfiles[i],
 		    hostkeys_check_old, ctx, ctx->host_str, ctx->ip_str,
 		    HKF_WANT_PARSE_KEY, 0)) != 0) {
 			if (r == SSH_ERR_SYSTEM_ERROR && errno == ENOENT) {
 				debug_f("hostkeys file %s does not exist",
 				    options.user_hostfiles[i]);
 				continue;
 			}
 			error_fr(r, "hostkeys_foreach failed for %s",
 			    options.user_hostfiles[i]);
 			return -1;
 		}
 	}
 	return 0;
 }
 
 static void
 hostkey_change_preamble(LogLevel loglevel)
 {
 	do_log2(loglevel, "The server has updated its host keys.");
 	do_log2(loglevel, "These changes were verified by the server's "
 	    "existing trusted key.");
 }
 
 static void
 update_known_hosts(struct hostkeys_update_ctx *ctx)
 {
 	int r, was_raw = 0, first = 1;
 	int asking = options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK;
 	LogLevel loglevel = asking ?  SYSLOG_LEVEL_INFO : SYSLOG_LEVEL_VERBOSE;
 	char *fp, *response;
 	size_t i;
 	struct stat sb;
 
 	for (i = 0; i < ctx->nkeys; i++) {
 		if (!ctx->keys_verified[i])
 			continue;
 		if ((fp = sshkey_fingerprint(ctx->keys[i],
 		    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("sshkey_fingerprint failed");
 		if (first && asking)
 			hostkey_change_preamble(loglevel);
 		do_log2(loglevel, "Learned new hostkey: %s %s",
 		    sshkey_type(ctx->keys[i]), fp);
 		first = 0;
 		free(fp);
 	}
 	for (i = 0; i < ctx->nold; i++) {
 		if ((fp = sshkey_fingerprint(ctx->old_keys[i],
 		    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("sshkey_fingerprint failed");
 		if (first && asking)
 			hostkey_change_preamble(loglevel);
 		do_log2(loglevel, "Deprecating obsolete hostkey: %s %s",
 		    sshkey_type(ctx->old_keys[i]), fp);
 		first = 0;
 		free(fp);
 	}
 	if (options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK) {
 		if (get_saved_tio() != NULL) {
 			leave_raw_mode(1);
 			was_raw = 1;
 		}
 		response = NULL;
 		for (i = 0; !quit_pending && i < 3; i++) {
 			free(response);
 			response = read_passphrase("Accept updated hostkeys? "
 			    "(yes/no): ", RP_ECHO);
 			if (response != NULL && strcasecmp(response, "yes") == 0)
 				break;
 			else if (quit_pending || response == NULL ||
 			    strcasecmp(response, "no") == 0) {
 				options.update_hostkeys = 0;
 				break;
 			} else {
 				do_log2(loglevel, "Please enter "
 				    "\"yes\" or \"no\"");
 			}
 		}
 		if (quit_pending || i >= 3 || response == NULL)
 			options.update_hostkeys = 0;
 		free(response);
 		if (was_raw)
 			enter_raw_mode(1);
 	}
 	if (options.update_hostkeys == 0)
 		return;
 	/*
 	 * Now that all the keys are verified, we can go ahead and replace
 	 * them in known_hosts (assuming SSH_UPDATE_HOSTKEYS_ASK didn't
 	 * cancel the operation).
 	 */
 	for (i = 0; i < options.num_user_hostfiles; i++) {
 		/*
 		 * NB. keys are only added to hostfiles[0], for the rest we
 		 * just delete the hostname entries.
 		 */
 		if (stat(options.user_hostfiles[i], &sb) != 0) {
 			if (errno == ENOENT) {
 				debug_f("known hosts file %s does not "
 				    "exist", options.user_hostfiles[i]);
 			} else {
 				error_f("known hosts file %s "
 				    "inaccessible: %s",
 				    options.user_hostfiles[i], strerror(errno));
 			}
 			continue;
 		}
 		if ((r = hostfile_replace_entries(options.user_hostfiles[i],
 		    ctx->host_str, ctx->ip_str,
 		    i == 0 ? ctx->keys : NULL, i == 0 ? ctx->nkeys : 0,
 		    options.hash_known_hosts, 0,
 		    options.fingerprint_hash)) != 0) {
 			error_fr(r, "hostfile_replace_entries failed for %s",
 			    options.user_hostfiles[i]);
 		}
 	}
 }
 
 static void
 client_global_hostkeys_prove_confirm(struct ssh *ssh, int type,
     u_int32_t seq, void *_ctx)
 {
 	struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx;
 	size_t i, ndone;
 	struct sshbuf *signdata;
 	int r, plaintype;
 	const u_char *sig;
 	const char *rsa_kexalg = NULL;
 	char *alg = NULL;
 	size_t siglen;
 
 	if (ctx->nnew == 0)
 		fatal_f("ctx->nnew == 0"); /* sanity */
 	if (type != SSH2_MSG_REQUEST_SUCCESS) {
 		error("Server failed to confirm ownership of "
 		    "private host keys");
 		hostkeys_update_ctx_free(ctx);
 		return;
 	}
 	if (sshkey_type_plain(sshkey_type_from_name(
 	    ssh->kex->hostkey_alg)) == KEY_RSA)
 		rsa_kexalg = ssh->kex->hostkey_alg;
 	if ((signdata = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	/*
 	 * Expect a signature for each of the ctx->nnew private keys we
 	 * haven't seen before. They will be in the same order as the
 	 * ctx->keys where the corresponding ctx->keys_match[i] == 0.
 	 */
 	for (ndone = i = 0; i < ctx->nkeys; i++) {
 		if (ctx->keys_match[i])
 			continue;
 		plaintype = sshkey_type_plain(ctx->keys[i]->type);
 		/* Prepare data to be signed: session ID, unique string, key */
 		sshbuf_reset(signdata);
 		if ( (r = sshbuf_put_cstring(signdata,
 		    "hostkeys-prove-00@openssh.com")) != 0 ||
 		    (r = sshbuf_put_stringb(signdata,
 		    ssh->kex->session_id)) != 0 ||
 		    (r = sshkey_puts(ctx->keys[i], signdata)) != 0)
 			fatal_fr(r, "compose signdata");
 		/* Extract and verify signature */
 		if ((r = sshpkt_get_string_direct(ssh, &sig, &siglen)) != 0) {
 			error_fr(r, "parse sig");
 			goto out;
 		}
 		if ((r = sshkey_get_sigtype(sig, siglen, &alg)) != 0) {
 			error_fr(r, "server gave unintelligible signature "
 			    "for %s key %zu", sshkey_type(ctx->keys[i]), i);
 			goto out;
 		}
 		/*
 		 * Special case for RSA keys: if a RSA hostkey was negotiated,
 		 * then use its signature type for verification of RSA hostkey
 		 * proofs. Otherwise, accept only RSA-SHA256/512 signatures.
 		 */
 		if (plaintype == KEY_RSA && rsa_kexalg == NULL &&
 		    match_pattern_list(alg, HOSTKEY_PROOF_RSA_ALGS, 0) != 1) {
 			debug_f("server used untrusted RSA signature algorithm "
 			    "%s for key %zu, disregarding", alg, i);
 			free(alg);
 			/* zap the key from the list */
 			sshkey_free(ctx->keys[i]);
 			ctx->keys[i] = NULL;
 			ndone++;
 			continue;
 		}
 		debug3_f("verify %s key %zu using sigalg %s",
 		    sshkey_type(ctx->keys[i]), i, alg);
 		free(alg);
 		if ((r = sshkey_verify(ctx->keys[i], sig, siglen,
 		    sshbuf_ptr(signdata), sshbuf_len(signdata),
 		    plaintype == KEY_RSA ? rsa_kexalg : NULL, 0, NULL)) != 0) {
 			error_fr(r, "server gave bad signature for %s key %zu",
 			    sshkey_type(ctx->keys[i]), i);
 			goto out;
 		}
 		/* Key is good. Mark it as 'seen' */
 		ctx->keys_verified[i] = 1;
 		ndone++;
 	}
 	/* Shouldn't happen */
 	if (ndone != ctx->nnew)
 		fatal_f("ndone != ctx->nnew (%zu / %zu)", ndone, ctx->nnew);
 	if ((r = sshpkt_get_end(ssh)) != 0) {
 		error_f("protocol error");
 		goto out;
 	}
 
 	/* Make the edits to known_hosts */
 	update_known_hosts(ctx);
  out:
 	hostkeys_update_ctx_free(ctx);
 	hostkeys_update_complete = 1;
 	client_repledge();
 }
 
 /*
  * Returns non-zero if the key is accepted by HostkeyAlgorithms.
  * Made slightly less trivial by the multiple RSA signature algorithm names.
  */
 static int
 key_accepted_by_hostkeyalgs(const struct sshkey *key)
 {
 	const char *ktype = sshkey_ssh_name(key);
 	const char *hostkeyalgs = options.hostkeyalgorithms;
 
 	if (key->type == KEY_UNSPEC)
 		return 0;
 	if (key->type == KEY_RSA &&
 	    (match_pattern_list("rsa-sha2-256", hostkeyalgs, 0) == 1 ||
 	    match_pattern_list("rsa-sha2-512", hostkeyalgs, 0) == 1))
 		return 1;
 	return match_pattern_list(ktype, hostkeyalgs, 0) == 1;
 }
 
 /*
  * Handle hostkeys-00@openssh.com global request to inform the client of all
  * the server's hostkeys. The keys are checked against the user's
  * HostkeyAlgorithms preference before they are accepted.
  */
 static int
 client_input_hostkeys(struct ssh *ssh)
 {
 	const u_char *blob = NULL;
 	size_t i, len = 0;
 	struct sshbuf *buf = NULL;
 	struct sshkey *key = NULL, **tmp;
 	int r, prove_sent = 0;
 	char *fp;
 	static int hostkeys_seen = 0; /* XXX use struct ssh */
 	extern struct sockaddr_storage hostaddr; /* XXX from ssh.c */
 	struct hostkeys_update_ctx *ctx = NULL;
 	u_int want;
 
 	if (hostkeys_seen)
 		fatal_f("server already sent hostkeys");
 	if (!can_update_hostkeys())
 		return 1;
 	hostkeys_seen = 1;
 
 	ctx = xcalloc(1, sizeof(*ctx));
 	while (ssh_packet_remaining(ssh) > 0) {
 		sshkey_free(key);
 		key = NULL;
 		if ((r = sshpkt_get_string_direct(ssh, &blob, &len)) != 0) {
 			error_fr(r, "parse key");
 			goto out;
 		}
 		if ((r = sshkey_from_blob(blob, len, &key)) != 0) {
 			do_log2_fr(r, r == SSH_ERR_KEY_TYPE_UNKNOWN ?
 			    SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_ERROR,
 			    "convert key");
 			continue;
 		}
 		fp = sshkey_fingerprint(key, options.fingerprint_hash,
 		    SSH_FP_DEFAULT);
 		debug3_f("received %s key %s", sshkey_type(key), fp);
 		free(fp);
 
 		if (!key_accepted_by_hostkeyalgs(key)) {
 			debug3_f("%s key not permitted by "
 			    "HostkeyAlgorithms", sshkey_ssh_name(key));
 			continue;
 		}
 		/* Skip certs */
 		if (sshkey_is_cert(key)) {
 			debug3_f("%s key is a certificate; skipping",
 			    sshkey_ssh_name(key));
 			continue;
 		}
 		/* Ensure keys are unique */
 		for (i = 0; i < ctx->nkeys; i++) {
 			if (sshkey_equal(key, ctx->keys[i])) {
 				error_f("received duplicated %s host key",
 				    sshkey_ssh_name(key));
 				goto out;
 			}
 		}
 		/* Key is good, record it */
 		if ((tmp = recallocarray(ctx->keys, ctx->nkeys, ctx->nkeys + 1,
 		    sizeof(*ctx->keys))) == NULL)
 			fatal_f("recallocarray failed nkeys = %zu",
 			    ctx->nkeys);
 		ctx->keys = tmp;
 		ctx->keys[ctx->nkeys++] = key;
 		key = NULL;
 	}
 
 	if (ctx->nkeys == 0) {
 		debug_f("server sent no hostkeys");
 		goto out;
 	}
 
 	if ((ctx->keys_match = calloc(ctx->nkeys,
 	    sizeof(*ctx->keys_match))) == NULL ||
 	    (ctx->keys_verified = calloc(ctx->nkeys,
 	    sizeof(*ctx->keys_verified))) == NULL)
 		fatal_f("calloc failed");
 
 	get_hostfile_hostname_ipaddr(host,
 	    options.check_host_ip ? (struct sockaddr *)&hostaddr : NULL,
 	    options.port, &ctx->host_str,
 	    options.check_host_ip ? &ctx->ip_str : NULL);
 
 	/* Find which keys we already know about. */
 	for (i = 0; i < options.num_user_hostfiles; i++) {
 		debug_f("searching %s for %s / %s",
 		    options.user_hostfiles[i], ctx->host_str,
 		    ctx->ip_str ? ctx->ip_str : "(none)");
 		if ((r = hostkeys_foreach(options.user_hostfiles[i],
 		    hostkeys_find, ctx, ctx->host_str, ctx->ip_str,
 		    HKF_WANT_PARSE_KEY, 0)) != 0) {
 			if (r == SSH_ERR_SYSTEM_ERROR && errno == ENOENT) {
 				debug_f("hostkeys file %s does not exist",
 				    options.user_hostfiles[i]);
 				continue;
 			}
 			error_fr(r, "hostkeys_foreach failed for %s",
 			    options.user_hostfiles[i]);
 			goto out;
 		}
 	}
 
 	/* Figure out if we have any new keys to add */
 	ctx->nnew = ctx->nincomplete = 0;
 	want = HKF_MATCH_HOST | ( options.check_host_ip ? HKF_MATCH_IP : 0);
 	for (i = 0; i < ctx->nkeys; i++) {
 		if (ctx->keys_match[i] == 0)
 			ctx->nnew++;
 		if ((ctx->keys_match[i] & want) != want)
 			ctx->nincomplete++;
 	}
 
 	debug3_f("%zu server keys: %zu new, %zu retained, "
 	    "%zu incomplete match. %zu to remove", ctx->nkeys, ctx->nnew,
 	    ctx->nkeys - ctx->nnew - ctx->nincomplete,
 	    ctx->nincomplete, ctx->nold);
 
 	if (ctx->nnew == 0 && ctx->nold == 0) {
 		debug_f("no new or deprecated keys from server");
 		goto out;
 	}
 
 	/* Various reasons why we cannot proceed with the update */
 	if (ctx->complex_hostspec) {
 		debug_f("CA/revocation marker, manual host list or wildcard "
 		    "host pattern found, skipping UserKnownHostsFile update");
 		goto out;
 	}
 	if (ctx->other_name_seen) {
 		debug_f("host key found matching a different name/address, "
 		    "skipping UserKnownHostsFile update");
 		goto out;
 	}
 	/*
 	 * If removing keys, check whether they appear under different
 	 * names/addresses and refuse to proceed if they do. This avoids
 	 * cases such as hosts with multiple names becoming inconsistent
 	 * with regards to CheckHostIP entries.
 	 * XXX UpdateHostkeys=force to override this (and other) checks?
 	 */
 	if (ctx->nold != 0) {
 		if (check_old_keys_othernames(ctx) != 0)
 			goto out; /* error already logged */
 		if (ctx->old_key_seen) {
 			debug_f("key(s) for %s%s%s exist under other names; "
 			    "skipping UserKnownHostsFile update",
 			    ctx->host_str, ctx->ip_str == NULL ? "" : ",",
 			    ctx->ip_str == NULL ? "" : ctx->ip_str);
 			goto out;
 		}
 	}
 
 	if (ctx->nnew == 0) {
 		/*
 		 * We have some keys to remove or fix matching for.
 		 * We can proceed to do this without requiring a fresh proof
 		 * from the server.
 		 */
 		update_known_hosts(ctx);
 		goto out;
 	}
 	/*
 	 * We have received previously-unseen keys from the server.
 	 * Ask the server to confirm ownership of the private halves.
 	 */
 	debug3_f("asking server to prove ownership for %zu keys", ctx->nnew);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh,
 	    "hostkeys-prove-00@openssh.com")) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 1)) != 0) /* bool: want reply */
 		fatal_fr(r, "prepare hostkeys-prove");
 	if ((buf = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new");
 	for (i = 0; i < ctx->nkeys; i++) {
 		if (ctx->keys_match[i])
 			continue;
 		sshbuf_reset(buf);
 		if ((r = sshkey_putb(ctx->keys[i], buf)) != 0 ||
 		    (r = sshpkt_put_stringb(ssh, buf)) != 0)
 			fatal_fr(r, "assemble hostkeys-prove");
 	}
 	if ((r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send hostkeys-prove");
 	client_register_global_confirm(
 	    client_global_hostkeys_prove_confirm, ctx);
 	ctx = NULL;  /* will be freed in callback */
 	prove_sent = 1;
 
 	/* Success */
  out:
 	hostkeys_update_ctx_free(ctx);
 	sshkey_free(key);
 	sshbuf_free(buf);
 	if (!prove_sent) {
 		/* UpdateHostkeys handling completed */
 		hostkeys_update_complete = 1;
 		client_repledge();
 	}
 	/*
 	 * NB. Return success for all cases. The server doesn't need to know
 	 * what the client does with its hosts file.
 	 */
 	return 1;
 }
 
 static int
 client_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
 {
 	char *rtype;
 	u_char want_reply;
 	int r, success = 0;
 
 	if ((r = sshpkt_get_cstring(ssh, &rtype, NULL)) != 0 ||
 	    (r = sshpkt_get_u8(ssh, &want_reply)) != 0)
 		goto out;
 	debug("client_input_global_request: rtype %s want_reply %d",
 	    rtype, want_reply);
 	if (strcmp(rtype, "hostkeys-00@openssh.com") == 0)
 		success = client_input_hostkeys(ssh);
 	if (want_reply) {
 		if ((r = sshpkt_start(ssh, success ? SSH2_MSG_REQUEST_SUCCESS :
 		    SSH2_MSG_REQUEST_FAILURE)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0 ||
 		    (r = ssh_packet_write_wait(ssh)) != 0)
 			goto out;
 	}
 	r = 0;
  out:
 	free(rtype);
 	return r;
 }
 
 static void
 client_send_env(struct ssh *ssh, int id, const char *name, const char *val)
 {
 	int r;
 
 	debug("channel %d: setting env %s = \"%s\"", id, name, val);
 	channel_request_start(ssh, id, "env", 0);
 	if ((r = sshpkt_put_cstring(ssh, name)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, val)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send setenv");
 }
 
 void
 client_session2_setup(struct ssh *ssh, int id, int want_tty, int want_subsystem,
     const char *term, struct termios *tiop, int in_fd, struct sshbuf *cmd,
     char **env)
 {
 	size_t i, j, len;
 	int matched, r;
 	char *name, *val;
 	Channel *c = NULL;
 
 	debug2_f("id %d", id);
 
 	if ((c = channel_lookup(ssh, id)) == NULL)
 		fatal_f("channel %d: unknown channel", id);
 
 	ssh_packet_set_interactive(ssh, want_tty,
 	    options.ip_qos_interactive, options.ip_qos_bulk);
 
 	if (want_tty) {
 		struct winsize ws;
 
 		/* Store window size in the packet. */
 		if (ioctl(in_fd, TIOCGWINSZ, &ws) == -1)
 			memset(&ws, 0, sizeof(ws));
 
 		channel_request_start(ssh, id, "pty-req", 1);
 		client_expect_confirm(ssh, id, "PTY allocation", CONFIRM_TTY);
 		if ((r = sshpkt_put_cstring(ssh, term != NULL ? term : ""))
 		    != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_col)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_row)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_xpixel)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, (u_int)ws.ws_ypixel)) != 0)
 			fatal_fr(r, "build pty-req");
 		if (tiop == NULL)
 			tiop = get_saved_tio();
 		ssh_tty_make_modes(ssh, -1, tiop);
 		if ((r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send pty-req");
 		/* XXX wait for reply */
 		c->client_tty = 1;
 	}
 
 	/* Transfer any environment variables from client to server */
 	if (options.num_send_env != 0 && env != NULL) {
 		debug("Sending environment.");
 		for (i = 0; env[i] != NULL; i++) {
 			/* Split */
 			name = xstrdup(env[i]);
 			if ((val = strchr(name, '=')) == NULL) {
 				free(name);
 				continue;
 			}
 			*val++ = '\0';
 
 			matched = 0;
 			for (j = 0; j < options.num_send_env; j++) {
 				if (match_pattern(name, options.send_env[j])) {
 					matched = 1;
 					break;
 				}
 			}
 			if (!matched) {
 				debug3("Ignored env %s", name);
 				free(name);
 				continue;
 			}
 			client_send_env(ssh, id, name, val);
 			free(name);
 		}
 	}
 	for (i = 0; i < options.num_setenv; i++) {
 		/* Split */
 		name = xstrdup(options.setenv[i]);
 		if ((val = strchr(name, '=')) == NULL) {
 			free(name);
 			continue;
 		}
 		*val++ = '\0';
 		client_send_env(ssh, id, name, val);
 		free(name);
 	}
 
 	len = sshbuf_len(cmd);
 	if (len > 0) {
 		if (len > 900)
 			len = 900;
 		if (want_subsystem) {
 			debug("Sending subsystem: %.*s",
 			    (int)len, (const u_char*)sshbuf_ptr(cmd));
 			channel_request_start(ssh, id, "subsystem", 1);
 			client_expect_confirm(ssh, id, "subsystem",
 			    CONFIRM_CLOSE);
 		} else {
 			debug("Sending command: %.*s",
 			    (int)len, (const u_char*)sshbuf_ptr(cmd));
 			channel_request_start(ssh, id, "exec", 1);
 			client_expect_confirm(ssh, id, "exec", CONFIRM_CLOSE);
 		}
 		if ((r = sshpkt_put_stringb(ssh, cmd)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send command");
 	} else {
 		channel_request_start(ssh, id, "shell", 1);
 		client_expect_confirm(ssh, id, "shell", CONFIRM_CLOSE);
 		if ((r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send shell");
 	}
 
 	session_setup_complete = 1;
 	client_repledge();
 }
 
 static void
 client_init_dispatch(struct ssh *ssh)
 {
 	ssh_dispatch_init(ssh, &dispatch_protocol_error);
 
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_DATA, &channel_input_data);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm);
 	ssh_dispatch_set(ssh, SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm);
 	ssh_dispatch_set(ssh, SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
 
 	/* rekeying */
 	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, &kex_input_kexinit);
 
 	/* global request reply messages */
 	ssh_dispatch_set(ssh, SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
 	ssh_dispatch_set(ssh, SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
 }
 
 void
 client_stop_mux(void)
 {
 	if (options.control_path != NULL && muxserver_sock != -1)
 		unlink(options.control_path);
 	/*
 	 * If we are in persist mode, or don't have a shell, signal that we
 	 * should close when all active channels are closed.
 	 */
 	if (options.control_persist || options.session_type == SESSION_TYPE_NONE) {
 		session_closed = 1;
 		setproctitle("[stopped mux]");
 	}
 }
 
 /* client specific fatal cleanup */
 void
 cleanup_exit(int i)
 {
 	leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
 	if (options.control_path != NULL && muxserver_sock != -1)
 		unlink(options.control_path);
 	ssh_kill_proxy_command();
 	_exit(i);
 }
diff --git a/config.h.in b/config.h.in
index b09986e7b358..75a2f5aa3bef 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1,2037 +1,2040 @@
 /* config.h.in.  Generated from configure.ac by autoheader.  */
 
 /* Define if building universal (internal helper macro) */
 #undef AC_APPLE_UNIVERSAL_BUILD
 
 /* Define if you have a getaddrinfo that fails for the all-zeros IPv6 address
    */
 #undef AIX_GETNAMEINFO_HACK
 
 /* Define if your AIX loginfailed() function takes 4 arguments (AIX >= 5.2) */
 #undef AIX_LOGINFAILED_4ARG
 
 /* System only supports IPv4 audit records */
 #undef AU_IPv4
 
 /* Define if your resolver libs need this for getrrsetbyname */
 #undef BIND_8_COMPAT
 
 /* The system has incomplete BSM API */
 #undef BROKEN_BSM_API
 
 /* broken in chroots on older kernels */
 #undef BROKEN_CLOSEFROM
 
 /* Define if cmsg_type is not passed correctly */
 #undef BROKEN_CMSG_TYPE
 
 /* getaddrinfo is broken (if present) */
 #undef BROKEN_GETADDRINFO
 
 /* getgroups(0,NULL) will return -1 */
 #undef BROKEN_GETGROUPS
 
 /* getline is not what we expect */
 #undef BROKEN_GETLINE
 
 /* FreeBSD glob does not do what we need */
 #undef BROKEN_GLOB
 
 /* Define if you system's inet_ntoa is busted (e.g. Irix gcc issue) */
 #undef BROKEN_INET_NTOA
 
 /* Define if your struct dirent expects you to allocate extra space for d_name
    */
 #undef BROKEN_ONE_BYTE_DIRENT_D_NAME
 
 /* System poll(2) implementation is broken */
 #undef BROKEN_POLL
 
 /* Can't do comparisons on readv */
 #undef BROKEN_READV_COMPARISON
 
 /* NetBSD read function is sometimes redirected, breaking atomicio comparisons
    against it */
 #undef BROKEN_READ_COMPARISON
 
 /* Needed for NeXT */
 #undef BROKEN_SAVED_UIDS
 
 /* Define if your setregid() is broken */
 #undef BROKEN_SETREGID
 
 /* Define if your setresgid() is broken */
 #undef BROKEN_SETRESGID
 
 /* Define if your setresuid() is broken */
 #undef BROKEN_SETRESUID
 
 /* Define if your setreuid() is broken */
 #undef BROKEN_SETREUID
 
 /* LynxOS has broken setvbuf() implementation */
 #undef BROKEN_SETVBUF
 
 /* QNX shadow support is broken */
 #undef BROKEN_SHADOW_EXPIRE
 
 /* Define if your snprintf is busted */
 #undef BROKEN_SNPRINTF
 
 /* strndup broken, see APAR IY61211 */
 #undef BROKEN_STRNDUP
 
 /* strnlen broken, see APAR IY62551 */
 #undef BROKEN_STRNLEN
 
 /* strnvis detected broken */
 #undef BROKEN_STRNVIS
 
 /* tcgetattr with ICANON may hang */
 #undef BROKEN_TCGETATTR_ICANON
 
 /* updwtmpx is broken (if present) */
 #undef BROKEN_UPDWTMPX
 
 /* Define if you have BSD auth support */
 #undef BSD_AUTH
 
 /* Define if you want to specify the path to your lastlog file */
 #undef CONF_LASTLOG_FILE
 
 /* Define if you want to specify the path to your utmp file */
 #undef CONF_UTMP_FILE
 
 /* Define if you want to specify the path to your wtmpx file */
 #undef CONF_WTMPX_FILE
 
 /* Define if you want to specify the path to your wtmp file */
 #undef CONF_WTMP_FILE
 
 /* Need to call setpgrp as root */
 #undef DISABLE_FD_PASSING
 
 /* Define if you don't want to use lastlog */
 #undef DISABLE_LASTLOG
 
 /* Define if you don't want to use your system's login() call */
 #undef DISABLE_LOGIN
 
 /* Define if you don't want to use pututline() etc. to write [uw]tmp */
 #undef DISABLE_PUTUTLINE
 
 /* Define if you don't want to use pututxline() etc. to write [uw]tmpx */
 #undef DISABLE_PUTUTXLINE
 
 /* Define if you want to disable shadow passwords */
 #undef DISABLE_SHADOW
 
 /* Define if you don't want to use utmp */
 #undef DISABLE_UTMP
 
 /* Define if you don't want to use utmpx */
 #undef DISABLE_UTMPX
 
 /* Define if you don't want to use wtmp */
 #undef DISABLE_WTMP
 
 /* Define if you don't want to use wtmpx */
 #undef DISABLE_WTMPX
 
 /* Enable for PKCS#11 support */
 #undef ENABLE_PKCS11
 
 /* Enable for U2F/FIDO support */
 #undef ENABLE_SK
 
 /* Enable for built-in U2F/FIDO support */
 #undef ENABLE_SK_INTERNAL
 
 /* define if fflush(NULL) does not work */
 #undef FFLUSH_NULL_BUG
 
 /* File names may not contain backslash characters */
 #undef FILESYSTEM_NO_BACKSLASH
 
 /* fsid_t has member val */
 #undef FSID_HAS_VAL
 
 /* fsid_t has member __val */
 #undef FSID_HAS___VAL
 
 /* getpgrp takes one arg */
 #undef GETPGRP_VOID
 
 /* Conflicting defs for getspnam */
 #undef GETSPNAM_CONFLICTING_DEFS
 
 /* Define if your system glob() function has the GLOB_ALTDIRFUNC extension */
 #undef GLOB_HAS_ALTDIRFUNC
 
 /* Define if your system glob() function has gl_matchc options in glob_t */
 #undef GLOB_HAS_GL_MATCHC
 
 /* Define if your system glob() function has gl_statv options in glob_t */
 #undef GLOB_HAS_GL_STATV
 
 /* Define this if you want GSSAPI support in the version 2 protocol */
 #undef GSSAPI
 
 /* Define if you want to use shadow password expire field */
 #undef HAS_SHADOW_EXPIRE
 
 /* Define if your system uses access rights style file descriptor passing */
 #undef HAVE_ACCRIGHTS_IN_MSGHDR
 
 /* Define if you have ut_addr in utmp.h */
 #undef HAVE_ADDR_IN_UTMP
 
 /* Define if you have ut_addr in utmpx.h */
 #undef HAVE_ADDR_IN_UTMPX
 
 /* Define if you have ut_addr_v6 in utmp.h */
 #undef HAVE_ADDR_V6_IN_UTMP
 
 /* Define if you have ut_addr_v6 in utmpx.h */
 #undef HAVE_ADDR_V6_IN_UTMPX
 
 /* Define to 1 if you have the `arc4random' function. */
 #undef HAVE_ARC4RANDOM
 
 /* Define to 1 if you have the `arc4random_buf' function. */
 #undef HAVE_ARC4RANDOM_BUF
 
 /* Define to 1 if you have the `arc4random_stir' function. */
 #undef HAVE_ARC4RANDOM_STIR
 
 /* Define to 1 if you have the `arc4random_uniform' function. */
 #undef HAVE_ARC4RANDOM_UNIFORM
 
 /* Define to 1 if you have the `asprintf' function. */
 #undef HAVE_ASPRINTF
 
 /* OpenBSD's gcc has bounded */
 #undef HAVE_ATTRIBUTE__BOUNDED__
 
 /* Have attribute nonnull */
 #undef HAVE_ATTRIBUTE__NONNULL__
 
 /* OpenBSD's gcc has sentinel */
 #undef HAVE_ATTRIBUTE__SENTINEL__
 
 /* Define to 1 if you have the `aug_get_machine' function. */
 #undef HAVE_AUG_GET_MACHINE
 
 /* Define to 1 if you have the `b64_ntop' function. */
 #undef HAVE_B64_NTOP
 
 /* Define to 1 if you have the `b64_pton' function. */
 #undef HAVE_B64_PTON
 
 /* Define if you have the basename function. */
 #undef HAVE_BASENAME
 
 /* Define to 1 if you have the `bcopy' function. */
 #undef HAVE_BCOPY
 
 /* Define to 1 if you have the `bcrypt_pbkdf' function. */
 #undef HAVE_BCRYPT_PBKDF
 
 /* Define to 1 if you have the `bindresvport_sa' function. */
 #undef HAVE_BINDRESVPORT_SA
 
 /* Define to 1 if you have the `blf_enc' function. */
 #undef HAVE_BLF_ENC
 
 /* Define to 1 if you have the <blf.h> header file. */
 #undef HAVE_BLF_H
 
 /* Define to 1 if you have the `Blowfish_expand0state' function. */
 #undef HAVE_BLOWFISH_EXPAND0STATE
 
 /* Define to 1 if you have the `Blowfish_expandstate' function. */
 #undef HAVE_BLOWFISH_EXPANDSTATE
 
 /* Define to 1 if you have the `Blowfish_initstate' function. */
 #undef HAVE_BLOWFISH_INITSTATE
 
 /* Define to 1 if you have the `Blowfish_stream2word' function. */
 #undef HAVE_BLOWFISH_STREAM2WORD
 
 /* Define to 1 if you have the `BN_is_prime_ex' function. */
 #undef HAVE_BN_IS_PRIME_EX
 
 /* Define to 1 if you have the <bsd/libutil.h> header file. */
 #undef HAVE_BSD_LIBUTIL_H
 
 /* Define to 1 if you have the <bsm/audit.h> header file. */
 #undef HAVE_BSM_AUDIT_H
 
 /* Define to 1 if you have the <bstring.h> header file. */
 #undef HAVE_BSTRING_H
 
 /* Define to 1 if you have the `bzero' function. */
 #undef HAVE_BZERO
 
 /* calloc(0, x) returns NULL */
 #undef HAVE_CALLOC
 
 /* Define if you have caph_cache_tzdata */
 #undef HAVE_CAPH_CACHE_TZDATA
 
 /* Define to 1 if you have the <capsicum_helpers.h> header file. */
 #undef HAVE_CAPSICUM_HELPERS_H
 
 /* Define to 1 if you have the `cap_rights_limit' function. */
 #undef HAVE_CAP_RIGHTS_LIMIT
 
 /* Define to 1 if you have the `clock' function. */
 #undef HAVE_CLOCK
 
 /* Have clock_gettime */
 #undef HAVE_CLOCK_GETTIME
 
 /* define if you have clock_t data type */
 #undef HAVE_CLOCK_T
 
 /* Define to 1 if you have the `closefrom' function. */
 #undef HAVE_CLOSEFROM
 
 /* Define to 1 if you have the `close_range' function. */
 #undef HAVE_CLOSE_RANGE
 
 /* Define if gai_strerror() returns const char * */
 #undef HAVE_CONST_GAI_STRERROR_PROTO
 
 /* Define if your system uses ancillary data style file descriptor passing */
 #undef HAVE_CONTROL_IN_MSGHDR
 
 /* Define to 1 if you have the `crypt' function. */
 #undef HAVE_CRYPT
 
 /* Define to 1 if you have the <crypto/sha2.h> header file. */
 #undef HAVE_CRYPTO_SHA2_H
 
 /* Define to 1 if you have the <crypt.h> header file. */
 #undef HAVE_CRYPT_H
 
 /* Define if you are on Cygwin */
 #undef HAVE_CYGWIN
 
 /* Define if your libraries define daemon() */
 #undef HAVE_DAEMON
 
 /* Define to 1 if you have the declaration of `AI_NUMERICSERV', and to 0 if
    you don't. */
 #undef HAVE_DECL_AI_NUMERICSERV
 
 /* Define to 1 if you have the declaration of `authenticate', and to 0 if you
    don't. */
 #undef HAVE_DECL_AUTHENTICATE
 
 /* Define to 1 if you have the declaration of `bzero', and to 0 if you don't.
    */
 #undef HAVE_DECL_BZERO
 
 /* Define to 1 if you have the declaration of `ftruncate', and to 0 if you
    don't. */
 #undef HAVE_DECL_FTRUNCATE
 
 /* Define to 1 if you have the declaration of `getentropy', and to 0 if you
    don't. */
 #undef HAVE_DECL_GETENTROPY
 
 /* Define to 1 if you have the declaration of `getpeereid', and to 0 if you
    don't. */
 #undef HAVE_DECL_GETPEEREID
 
 /* Define to 1 if you have the declaration of `GLOB_NOMATCH', and to 0 if you
    don't. */
 #undef HAVE_DECL_GLOB_NOMATCH
 
 /* Define to 1 if you have the declaration of `GSS_C_NT_HOSTBASED_SERVICE',
    and to 0 if you don't. */
 #undef HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE
 
 /* Define to 1 if you have the declaration of `howmany', and to 0 if you
    don't. */
 #undef HAVE_DECL_HOWMANY
 
 /* Define to 1 if you have the declaration of `h_errno', and to 0 if you
    don't. */
 #undef HAVE_DECL_H_ERRNO
 
 /* Define to 1 if you have the declaration of `loginfailed', and to 0 if you
    don't. */
 #undef HAVE_DECL_LOGINFAILED
 
 /* Define to 1 if you have the declaration of `loginrestrictions', and to 0 if
    you don't. */
 #undef HAVE_DECL_LOGINRESTRICTIONS
 
 /* Define to 1 if you have the declaration of `loginsuccess', and to 0 if you
    don't. */
 #undef HAVE_DECL_LOGINSUCCESS
 
 /* Define to 1 if you have the declaration of `MAXSYMLINKS', and to 0 if you
    don't. */
 #undef HAVE_DECL_MAXSYMLINKS
 
 /* Define to 1 if you have the declaration of `memmem', and to 0 if you don't.
    */
 #undef HAVE_DECL_MEMMEM
 
 /* Define to 1 if you have the declaration of `NFDBITS', and to 0 if you
    don't. */
 #undef HAVE_DECL_NFDBITS
 
 /* Define to 1 if you have the declaration of `offsetof', and to 0 if you
    don't. */
 #undef HAVE_DECL_OFFSETOF
 
 /* Define to 1 if you have the declaration of `O_NONBLOCK', and to 0 if you
    don't. */
 #undef HAVE_DECL_O_NONBLOCK
 
 /* Define to 1 if you have the declaration of `passwdexpired', and to 0 if you
    don't. */
 #undef HAVE_DECL_PASSWDEXPIRED
 
 /* Define to 1 if you have the declaration of `readv', and to 0 if you don't.
    */
 #undef HAVE_DECL_READV
 
 /* Define to 1 if you have the declaration of `setauthdb', and to 0 if you
    don't. */
 #undef HAVE_DECL_SETAUTHDB
 
 /* Define to 1 if you have the declaration of `SHUT_RD', and to 0 if you
    don't. */
 #undef HAVE_DECL_SHUT_RD
 
 /* Define to 1 if you have the declaration of `UINT32_MAX', and to 0 if you
    don't. */
 #undef HAVE_DECL_UINT32_MAX
 
 /* Define to 1 if you have the declaration of `writev', and to 0 if you don't.
    */
 #undef HAVE_DECL_WRITEV
 
 /* Define to 1 if you have the declaration of `_getlong', and to 0 if you
    don't. */
 #undef HAVE_DECL__GETLONG
 
 /* Define to 1 if you have the declaration of `_getshort', and to 0 if you
    don't. */
 #undef HAVE_DECL__GETSHORT
 
 /* Define to 1 if you have the `DES_crypt' function. */
 #undef HAVE_DES_CRYPT
 
 /* Define if you have /dev/ptmx */
 #undef HAVE_DEV_PTMX
 
 /* Define if you have /dev/ptc */
 #undef HAVE_DEV_PTS_AND_PTC
 
 /* Define to 1 if you have the <dirent.h> header file. */
 #undef HAVE_DIRENT_H
 
 /* Define to 1 if you have the `dirfd' function. */
 #undef HAVE_DIRFD
 
 /* Define to 1 if you have the `dirname' function. */
 #undef HAVE_DIRNAME
 
 /* Define to 1 if you have the `dlopen' function. */
 #undef HAVE_DLOPEN
 
 /* Define to 1 if you have the `DSA_generate_parameters_ex' function. */
 #undef HAVE_DSA_GENERATE_PARAMETERS_EX
 
 /* Define to 1 if you have the `EC_KEY_METHOD_new' function. */
 #undef HAVE_EC_KEY_METHOD_NEW
 
 /* Define to 1 if you have the <elf.h> header file. */
 #undef HAVE_ELF_H
 
 /* Define to 1 if you have the `endgrent' function. */
 #undef HAVE_ENDGRENT
 
 /* Define to 1 if you have the <endian.h> header file. */
 #undef HAVE_ENDIAN_H
 
 /* Define to 1 if you have the `endutent' function. */
 #undef HAVE_ENDUTENT
 
 /* Define to 1 if you have the `endutxent' function. */
 #undef HAVE_ENDUTXENT
 
 /* Define to 1 if you have the `err' function. */
 #undef HAVE_ERR
 
 /* Define to 1 if you have the `errx' function. */
 #undef HAVE_ERRX
 
 /* Define to 1 if you have the <err.h> header file. */
 #undef HAVE_ERR_H
 
 /* Define if your system has /etc/default/login */
 #undef HAVE_ETC_DEFAULT_LOGIN
 
 /* Define to 1 if you have the `EVP_chacha20' function. */
 #undef HAVE_EVP_CHACHA20
 
 /* Define to 1 if you have the `EVP_CIPHER_CTX_get_iv' function. */
 #undef HAVE_EVP_CIPHER_CTX_GET_IV
 
 /* Define to 1 if you have the `EVP_CIPHER_CTX_get_updated_iv' function. */
 #undef HAVE_EVP_CIPHER_CTX_GET_UPDATED_IV
 
 /* Define to 1 if you have the `EVP_CIPHER_CTX_iv' function. */
 #undef HAVE_EVP_CIPHER_CTX_IV
 
 /* Define to 1 if you have the `EVP_CIPHER_CTX_iv_noconst' function. */
 #undef HAVE_EVP_CIPHER_CTX_IV_NOCONST
 
 /* Define to 1 if you have the `EVP_CIPHER_CTX_set_iv' function. */
 #undef HAVE_EVP_CIPHER_CTX_SET_IV
 
 /* Define to 1 if you have the `EVP_DigestFinal_ex' function. */
 #undef HAVE_EVP_DIGESTFINAL_EX
 
 /* Define to 1 if you have the `EVP_DigestInit_ex' function. */
 #undef HAVE_EVP_DIGESTINIT_EX
 
 /* Define to 1 if you have the `EVP_MD_CTX_cleanup' function. */
 #undef HAVE_EVP_MD_CTX_CLEANUP
 
 /* Define to 1 if you have the `EVP_MD_CTX_copy_ex' function. */
 #undef HAVE_EVP_MD_CTX_COPY_EX
 
 /* Define to 1 if you have the `EVP_MD_CTX_init' function. */
 #undef HAVE_EVP_MD_CTX_INIT
 
 /* Define to 1 if you have the `EVP_PKEY_get_raw_private_key' function. */
 #undef HAVE_EVP_PKEY_GET_RAW_PRIVATE_KEY
 
 /* Define to 1 if you have the `EVP_PKEY_get_raw_public_key' function. */
 #undef HAVE_EVP_PKEY_GET_RAW_PUBLIC_KEY
 
 /* Define to 1 if you have the `EVP_sha256' function. */
 #undef HAVE_EVP_SHA256
 
 /* Define to 1 if you have the `EVP_sha384' function. */
 #undef HAVE_EVP_SHA384
 
 /* Define to 1 if you have the `EVP_sha512' function. */
 #undef HAVE_EVP_SHA512
 
 /* Define if you have ut_exit in utmp.h */
 #undef HAVE_EXIT_IN_UTMP
 
 /* Define to 1 if you have the `explicit_bzero' function. */
 #undef HAVE_EXPLICIT_BZERO
 
 /* Define to 1 if you have the `explicit_memset' function. */
 #undef HAVE_EXPLICIT_MEMSET
 
 /* Define to 1 if you have the `fchmod' function. */
 #undef HAVE_FCHMOD
 
 /* Define to 1 if you have the `fchmodat' function. */
 #undef HAVE_FCHMODAT
 
 /* Define to 1 if you have the `fchown' function. */
 #undef HAVE_FCHOWN
 
 /* Define to 1 if you have the `fchownat' function. */
 #undef HAVE_FCHOWNAT
 
 /* Use F_CLOSEM fcntl for closefrom */
 #undef HAVE_FCNTL_CLOSEM
 
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
 /* Define to 1 if the system has the type `fd_mask'. */
 #undef HAVE_FD_MASK
 
 /* Define to 1 if you have the <features.h> header file. */
 #undef HAVE_FEATURES_H
 
 /* Define to 1 if you have the `fido_assert_set_clientdata' function. */
 #undef HAVE_FIDO_ASSERT_SET_CLIENTDATA
 
 /* Define to 1 if you have the `fido_cred_prot' function. */
 #undef HAVE_FIDO_CRED_PROT
 
 /* Define to 1 if you have the `fido_cred_set_clientdata' function. */
 #undef HAVE_FIDO_CRED_SET_CLIENTDATA
 
 /* Define to 1 if you have the `fido_cred_set_prot' function. */
 #undef HAVE_FIDO_CRED_SET_PROT
 
 /* Define to 1 if you have the `fido_dev_get_touch_begin' function. */
 #undef HAVE_FIDO_DEV_GET_TOUCH_BEGIN
 
 /* Define to 1 if you have the `fido_dev_get_touch_status' function. */
 #undef HAVE_FIDO_DEV_GET_TOUCH_STATUS
 
 /* Define to 1 if you have the `fido_dev_is_winhello' function. */
 #undef HAVE_FIDO_DEV_IS_WINHELLO
 
 /* Define to 1 if you have the `fido_dev_supports_cred_prot' function. */
 #undef HAVE_FIDO_DEV_SUPPORTS_CRED_PROT
 
 /* Define to 1 if you have the <floatingpoint.h> header file. */
 #undef HAVE_FLOATINGPOINT_H
 
 /* Define to 1 if you have the `flock' function. */
 #undef HAVE_FLOCK
 
 /* Define to 1 if you have the `fmt_scaled' function. */
 #undef HAVE_FMT_SCALED
 
 /* Define to 1 if you have the `fnmatch' function. */
 #undef HAVE_FNMATCH
 
 /* Define to 1 if you have the <fnmatch.h> header file. */
 #undef HAVE_FNMATCH_H
 
 /* Define to 1 if you have the `freeaddrinfo' function. */
 #undef HAVE_FREEADDRINFO
 
 /* Define to 1 if you have the `freezero' function. */
 #undef HAVE_FREEZERO
 
 /* Define to 1 if the system has the type `fsblkcnt_t'. */
 #undef HAVE_FSBLKCNT_T
 
 /* Define to 1 if the system has the type `fsfilcnt_t'. */
 #undef HAVE_FSFILCNT_T
 
 /* Define to 1 if you have the `fstatfs' function. */
 #undef HAVE_FSTATFS
 
 /* Define to 1 if you have the `fstatvfs' function. */
 #undef HAVE_FSTATVFS
 
 /* Define to 1 if you have the `futimes' function. */
 #undef HAVE_FUTIMES
 
 /* Define to 1 if you have the `gai_strerror' function. */
 #undef HAVE_GAI_STRERROR
 
 /* Define to 1 if you have the `getaddrinfo' function. */
 #undef HAVE_GETADDRINFO
 
 /* Define to 1 if you have the `getaudit' function. */
 #undef HAVE_GETAUDIT
 
 /* Define to 1 if you have the `getaudit_addr' function. */
 #undef HAVE_GETAUDIT_ADDR
 
 /* Define to 1 if you have the `getcwd' function. */
 #undef HAVE_GETCWD
 
 /* Define to 1 if you have the `getentropy' function. */
 #undef HAVE_GETENTROPY
 
 /* Define to 1 if you have the `getgrouplist' function. */
 #undef HAVE_GETGROUPLIST
 
 /* Define to 1 if you have the `getgrset' function. */
 #undef HAVE_GETGRSET
 
 /* Define to 1 if you have the `getlastlogxbyname' function. */
 #undef HAVE_GETLASTLOGXBYNAME
 
 /* Define to 1 if you have the `getline' function. */
 #undef HAVE_GETLINE
 
 /* Define to 1 if you have the `getluid' function. */
 #undef HAVE_GETLUID
 
 /* Define to 1 if you have the `getnameinfo' function. */
 #undef HAVE_GETNAMEINFO
 
 /* Define to 1 if you have the `getopt' function. */
 #undef HAVE_GETOPT
 
 /* Define to 1 if you have the <getopt.h> header file. */
 #undef HAVE_GETOPT_H
 
 /* Define if your getopt(3) defines and uses optreset */
 #undef HAVE_GETOPT_OPTRESET
 
 /* Define if your libraries define getpagesize() */
 #undef HAVE_GETPAGESIZE
 
 /* Define to 1 if you have the `getpeereid' function. */
 #undef HAVE_GETPEEREID
 
 /* Define to 1 if you have the `getpeerucred' function. */
 #undef HAVE_GETPEERUCRED
 
 /* Define to 1 if you have the `getpgid' function. */
 #undef HAVE_GETPGID
 
 /* Define to 1 if you have the `getpgrp' function. */
 #undef HAVE_GETPGRP
 
 /* Define to 1 if you have the `getpwanam' function. */
 #undef HAVE_GETPWANAM
 
 /* Define to 1 if you have the `getrandom' function. */
 #undef HAVE_GETRANDOM
 
 /* Define to 1 if you have the `getrlimit' function. */
 #undef HAVE_GETRLIMIT
 
 /* Define if getrrsetbyname() exists */
 #undef HAVE_GETRRSETBYNAME
 
 /* Define to 1 if you have the `getseuserbyname' function. */
 #undef HAVE_GETSEUSERBYNAME
 
 /* Define to 1 if you have the `getsid' function. */
 #undef HAVE_GETSID
 
 /* Define to 1 if you have the `gettimeofday' function. */
 #undef HAVE_GETTIMEOFDAY
 
 /* Define to 1 if you have the `getttyent' function. */
 #undef HAVE_GETTTYENT
 
 /* Define to 1 if you have the `getutent' function. */
 #undef HAVE_GETUTENT
 
 /* Define to 1 if you have the `getutid' function. */
 #undef HAVE_GETUTID
 
 /* Define to 1 if you have the `getutline' function. */
 #undef HAVE_GETUTLINE
 
 /* Define to 1 if you have the `getutxent' function. */
 #undef HAVE_GETUTXENT
 
 /* Define to 1 if you have the `getutxid' function. */
 #undef HAVE_GETUTXID
 
 /* Define to 1 if you have the `getutxline' function. */
 #undef HAVE_GETUTXLINE
 
 /* Define to 1 if you have the `getutxuser' function. */
 #undef HAVE_GETUTXUSER
 
 /* Define to 1 if you have the `get_default_context_with_level' function. */
 #undef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
 
 /* Define to 1 if you have the `glob' function. */
 #undef HAVE_GLOB
 
 /* Define to 1 if you have the <glob.h> header file. */
 #undef HAVE_GLOB_H
 
 /* Define to 1 if you have the `group_from_gid' function. */
 #undef HAVE_GROUP_FROM_GID
 
 /* Define to 1 if you have the <gssapi_generic.h> header file. */
 #undef HAVE_GSSAPI_GENERIC_H
 
 /* Define to 1 if you have the <gssapi/gssapi_generic.h> header file. */
 #undef HAVE_GSSAPI_GSSAPI_GENERIC_H
 
 /* Define to 1 if you have the <gssapi/gssapi.h> header file. */
 #undef HAVE_GSSAPI_GSSAPI_H
 
 /* Define to 1 if you have the <gssapi/gssapi_krb5.h> header file. */
 #undef HAVE_GSSAPI_GSSAPI_KRB5_H
 
 /* Define to 1 if you have the <gssapi.h> header file. */
 #undef HAVE_GSSAPI_H
 
 /* Define to 1 if you have the <gssapi_krb5.h> header file. */
 #undef HAVE_GSSAPI_KRB5_H
 
 /* Define if HEADER.ad exists in arpa/nameser.h */
 #undef HAVE_HEADER_AD
 
 /* Define to 1 if you have the `HMAC_CTX_init' function. */
 #undef HAVE_HMAC_CTX_INIT
 
 /* Define if you have ut_host in utmp.h */
 #undef HAVE_HOST_IN_UTMP
 
 /* Define if you have ut_host in utmpx.h */
 #undef HAVE_HOST_IN_UTMPX
 
 /* Define to 1 if you have the <iaf.h> header file. */
 #undef HAVE_IAF_H
 
 /* Define to 1 if you have the <ia.h> header file. */
 #undef HAVE_IA_H
 
 /* Define if you have ut_id in utmp.h */
 #undef HAVE_ID_IN_UTMP
 
 /* Define if you have ut_id in utmpx.h */
 #undef HAVE_ID_IN_UTMPX
 
 /* Define to 1 if you have the <ifaddrs.h> header file. */
 #undef HAVE_IFADDRS_H
 
 /* Define to 1 if you have the `inet_aton' function. */
 #undef HAVE_INET_ATON
 
 /* Define to 1 if you have the `inet_ntoa' function. */
 #undef HAVE_INET_NTOA
 
 /* Define to 1 if you have the `inet_ntop' function. */
 #undef HAVE_INET_NTOP
 
 /* Define to 1 if you have the `innetgr' function. */
 #undef HAVE_INNETGR
 
 /* define if you have int64_t data type */
 #undef HAVE_INT64_T
 
 /* Define to 1 if the system has the type `intmax_t'. */
 #undef HAVE_INTMAX_T
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
 /* define if you have intxx_t data type */
 #undef HAVE_INTXX_T
 
 /* Define to 1 if the system has the type `in_addr_t'. */
 #undef HAVE_IN_ADDR_T
 
 /* Define to 1 if the system has the type `in_port_t'. */
 #undef HAVE_IN_PORT_T
 
 /* Define if you have isblank(3C). */
 #undef HAVE_ISBLANK
 
 /* Define to 1 if you have the `killpg' function. */
 #undef HAVE_KILLPG
 
 /* Define to 1 if you have the `krb5_cc_new_unique' function. */
 #undef HAVE_KRB5_CC_NEW_UNIQUE
 
 /* Define to 1 if you have the `krb5_free_error_message' function. */
 #undef HAVE_KRB5_FREE_ERROR_MESSAGE
 
 /* Define to 1 if you have the `krb5_get_error_message' function. */
 #undef HAVE_KRB5_GET_ERROR_MESSAGE
 
 /* Define to 1 if you have the <langinfo.h> header file. */
 #undef HAVE_LANGINFO_H
 
 /* Define to 1 if you have the <lastlog.h> header file. */
 #undef HAVE_LASTLOG_H
 
 /* Define if you want ldns support */
 #undef HAVE_LDNS
 
 /* Define to 1 if you have the <libaudit.h> header file. */
 #undef HAVE_LIBAUDIT_H
 
 /* Define to 1 if you have the `bsm' library (-lbsm). */
 #undef HAVE_LIBBSM
 
 /* Define to 1 if you have the `dl' library (-ldl). */
 #undef HAVE_LIBDL
 
 /* Define to 1 if you have the <libgen.h> header file. */
 #undef HAVE_LIBGEN_H
 
 /* Define if system has libiaf that supports set_id */
 #undef HAVE_LIBIAF
 
 /* Define to 1 if you have the `network' library (-lnetwork). */
 #undef HAVE_LIBNETWORK
 
 /* Define to 1 if you have the `pam' library (-lpam). */
 #undef HAVE_LIBPAM
 
 /* Define to 1 if you have the <libproc.h> header file. */
 #undef HAVE_LIBPROC_H
 
 /* Define to 1 if you have the `socket' library (-lsocket). */
 #undef HAVE_LIBSOCKET
 
 /* Define to 1 if you have the <libutil.h> header file. */
 #undef HAVE_LIBUTIL_H
 
 /* Define to 1 if you have the `xnet' library (-lxnet). */
 #undef HAVE_LIBXNET
 
 /* Define to 1 if you have the `z' library (-lz). */
 #undef HAVE_LIBZ
 
 /* Define to 1 if you have the <limits.h> header file. */
 #undef HAVE_LIMITS_H
 
 /* Define to 1 if you have the <linux/audit.h> header file. */
 #undef HAVE_LINUX_AUDIT_H
 
 /* Define to 1 if you have the <linux/filter.h> header file. */
 #undef HAVE_LINUX_FILTER_H
 
 /* Define to 1 if you have the <linux/if_tun.h> header file. */
 #undef HAVE_LINUX_IF_TUN_H
 
 /* Define to 1 if you have the <linux/seccomp.h> header file. */
 #undef HAVE_LINUX_SECCOMP_H
 
 /* Define to 1 if you have the `llabs' function. */
 #undef HAVE_LLABS
 
 /* Define to 1 if you have the <locale.h> header file. */
 #undef HAVE_LOCALE_H
 
 /* Define to 1 if you have the `localtime_r' function. */
 #undef HAVE_LOCALTIME_R
 
 /* Define to 1 if you have the `login' function. */
 #undef HAVE_LOGIN
 
 /* Define to 1 if you have the <login_cap.h> header file. */
 #undef HAVE_LOGIN_CAP_H
 
 /* Define to 1 if you have the `login_getcapbool' function. */
 #undef HAVE_LOGIN_GETCAPBOOL
 
 /* Define to 1 if you have the `login_getpwclass' function. */
 #undef HAVE_LOGIN_GETPWCLASS
 
 /* Define to 1 if you have the <login.h> header file. */
 #undef HAVE_LOGIN_H
 
 /* Define to 1 if you have the `logout' function. */
 #undef HAVE_LOGOUT
 
 /* Define to 1 if you have the `logwtmp' function. */
 #undef HAVE_LOGWTMP
 
 /* Define to 1 if the system has the type `long double'. */
 #undef HAVE_LONG_DOUBLE
 
 /* Define to 1 if the system has the type `long long'. */
 #undef HAVE_LONG_LONG
 
 /* Define to 1 if you have the <maillock.h> header file. */
 #undef HAVE_MAILLOCK_H
 
 /* Define to 1 if your system has a GNU libc compatible `malloc' function, and
    to 0 otherwise. */
 #undef HAVE_MALLOC
 
 /* Define to 1 if you have the `mblen' function. */
 #undef HAVE_MBLEN
 
 /* Define to 1 if you have the `mbtowc' function. */
 #undef HAVE_MBTOWC
 
 /* Define to 1 if you have the `memmem' function. */
 #undef HAVE_MEMMEM
 
 /* Define to 1 if you have the `memmove' function. */
 #undef HAVE_MEMMOVE
 
 /* Define to 1 if you have the `memset_s' function. */
 #undef HAVE_MEMSET_S
 
 /* Define to 1 if you have the `mkdtemp' function. */
 #undef HAVE_MKDTEMP
 
 /* define if you have mode_t data type */
 #undef HAVE_MODE_T
 
 /* Some systems put nanosleep outside of libc */
 #undef HAVE_NANOSLEEP
 
 /* Define to 1 if you have the <ndir.h> header file. */
 #undef HAVE_NDIR_H
 
 /* Define to 1 if you have the <netdb.h> header file. */
 #undef HAVE_NETDB_H
 
 /* Define to 1 if you have the <netgroup.h> header file. */
 #undef HAVE_NETGROUP_H
 
 /* Define to 1 if you have the <net/if_tun.h> header file. */
 #undef HAVE_NET_IF_TUN_H
 
 /* Define to 1 if you have the <net/route.h> header file. */
 #undef HAVE_NET_ROUTE_H
 
 /* Define if you are on NeXT */
 #undef HAVE_NEXT
 
 /* Define to 1 if the system has the type `nfds_t'. */
 #undef HAVE_NFDS_T
 
 /* Define to 1 if you have the `ngetaddrinfo' function. */
 #undef HAVE_NGETADDRINFO
 
 /* Define to 1 if you have the `nl_langinfo' function. */
 #undef HAVE_NL_LANGINFO
 
 /* Define to 1 if you have the `nsleep' function. */
 #undef HAVE_NSLEEP
 
 /* Define to 1 if you have the `ogetaddrinfo' function. */
 #undef HAVE_OGETADDRINFO
 
 /* Define if you have an old version of PAM which takes only one argument to
    pam_strerror */
 #undef HAVE_OLD_PAM
 
 /* Define to 1 if you have the `openlog_r' function. */
 #undef HAVE_OPENLOG_R
 
 /* Define to 1 if you have the `openpty' function. */
 #undef HAVE_OPENPTY
 
 /* as a macro */
 #undef HAVE_OPENSSL_ADD_ALL_ALGORITHMS
 
 /* Define to 1 if you have the `OpenSSL_version' function. */
 #undef HAVE_OPENSSL_VERSION
 
 /* Define to 1 if you have the `OpenSSL_version_num' function. */
 #undef HAVE_OPENSSL_VERSION_NUM
 
 /* Define if you have Digital Unix Security Integration Architecture */
 #undef HAVE_OSF_SIA
 
 /* Define to 1 if you have the `pam_getenvlist' function. */
 #undef HAVE_PAM_GETENVLIST
 
 /* Define to 1 if you have the <pam/pam_appl.h> header file. */
 #undef HAVE_PAM_PAM_APPL_H
 
 /* Define to 1 if you have the `pam_putenv' function. */
 #undef HAVE_PAM_PUTENV
 
 /* Define to 1 if you have the <paths.h> header file. */
 #undef HAVE_PATHS_H
 
 /* Define if you have ut_pid in utmp.h */
 #undef HAVE_PID_IN_UTMP
 
 /* define if you have pid_t data type */
 #undef HAVE_PID_T
 
 /* Define to 1 if you have the `pledge' function. */
 #undef HAVE_PLEDGE
 
 /* Define to 1 if you have the `poll' function. */
 #undef HAVE_POLL
 
 /* Define to 1 if you have the <poll.h> header file. */
 #undef HAVE_POLL_H
 
 /* Define to 1 if you have the `ppoll' function. */
 #undef HAVE_PPOLL
 
 /* Define to 1 if you have the `prctl' function. */
 #undef HAVE_PRCTL
 
 /* Define to 1 if you have the `priv_basicset' function. */
 #undef HAVE_PRIV_BASICSET
 
 /* Define to 1 if you have the <priv.h> header file. */
 #undef HAVE_PRIV_H
 
 /* Define to 1 if you have the `procctl' function. */
 #undef HAVE_PROCCTL
 
 /* Define if you have /proc/$pid/fd */
 #undef HAVE_PROC_PID
 
 /* Define to 1 if you have the `proc_pidinfo' function. */
 #undef HAVE_PROC_PIDINFO
 
 /* Define to 1 if you have the `pselect' function. */
 #undef HAVE_PSELECT
 
 /* Define to 1 if you have the `pstat' function. */
 #undef HAVE_PSTAT
 
 /* Define to 1 if you have the <pty.h> header file. */
 #undef HAVE_PTY_H
 
 /* Define to 1 if you have the `pututline' function. */
 #undef HAVE_PUTUTLINE
 
 /* Define to 1 if you have the `pututxline' function. */
 #undef HAVE_PUTUTXLINE
 
 /* Define to 1 if you have the `raise' function. */
 #undef HAVE_RAISE
 
 /* Define to 1 if you have the `readpassphrase' function. */
 #undef HAVE_READPASSPHRASE
 
 /* Define to 1 if you have the <readpassphrase.h> header file. */
 #undef HAVE_READPASSPHRASE_H
 
 /* Define to 1 if your system has a GNU libc compatible `realloc' function,
    and to 0 otherwise. */
 #undef HAVE_REALLOC
 
 /* Define to 1 if you have the `reallocarray' function. */
 #undef HAVE_REALLOCARRAY
 
 /* Define to 1 if you have the `realpath' function. */
 #undef HAVE_REALPATH
 
 /* Define to 1 if you have the `recallocarray' function. */
 #undef HAVE_RECALLOCARRAY
 
 /* Define to 1 if you have the `recvmsg' function. */
 #undef HAVE_RECVMSG
 
 /* sys/resource.h has RLIMIT_NPROC */
 #undef HAVE_RLIMIT_NPROC
 
 /* Define to 1 if you have the <rpc/types.h> header file. */
 #undef HAVE_RPC_TYPES_H
 
 /* Define to 1 if you have the `rresvport_af' function. */
 #undef HAVE_RRESVPORT_AF
 
 /* Define to 1 if you have the `RSA_generate_key_ex' function. */
 #undef HAVE_RSA_GENERATE_KEY_EX
 
 /* Define to 1 if you have the `RSA_get_default_method' function. */
 #undef HAVE_RSA_GET_DEFAULT_METHOD
 
 /* Define to 1 if you have the <sandbox.h> header file. */
 #undef HAVE_SANDBOX_H
 
 /* Define to 1 if you have the `sandbox_init' function. */
 #undef HAVE_SANDBOX_INIT
 
 /* define if you have sa_family_t data type */
 #undef HAVE_SA_FAMILY_T
 
 /* Define to 1 if you have the `scan_scaled' function. */
 #undef HAVE_SCAN_SCALED
 
 /* Define if you have SecureWare-based protected password database */
 #undef HAVE_SECUREWARE
 
 /* Define to 1 if you have the <security/pam_appl.h> header file. */
 #undef HAVE_SECURITY_PAM_APPL_H
 
 /* Define to 1 if you have the `sendmsg' function. */
 #undef HAVE_SENDMSG
 
 /* Define to 1 if you have the `setauthdb' function. */
 #undef HAVE_SETAUTHDB
 
 /* Define to 1 if you have the `setdtablesize' function. */
 #undef HAVE_SETDTABLESIZE
 
 /* Define to 1 if you have the `setegid' function. */
 #undef HAVE_SETEGID
 
 /* Define to 1 if you have the `setenv' function. */
 #undef HAVE_SETENV
 
 /* Define to 1 if you have the `seteuid' function. */
 #undef HAVE_SETEUID
 
 /* Define to 1 if you have the `setgroupent' function. */
 #undef HAVE_SETGROUPENT
 
 /* Define to 1 if you have the `setgroups' function. */
 #undef HAVE_SETGROUPS
 
 /* Define to 1 if you have the `setlinebuf' function. */
 #undef HAVE_SETLINEBUF
 
 /* Define to 1 if you have the `setlogin' function. */
 #undef HAVE_SETLOGIN
 
 /* Define to 1 if you have the `setluid' function. */
 #undef HAVE_SETLUID
 
 /* Define to 1 if you have the `setpassent' function. */
 #undef HAVE_SETPASSENT
 
 /* Define to 1 if you have the `setpcred' function. */
 #undef HAVE_SETPCRED
 
 /* Define to 1 if you have the `setpflags' function. */
 #undef HAVE_SETPFLAGS
 
 /* Define to 1 if you have the `setppriv' function. */
 #undef HAVE_SETPPRIV
 
 /* Define to 1 if you have the `setproctitle' function. */
 #undef HAVE_SETPROCTITLE
 
 /* Define to 1 if you have the `setregid' function. */
 #undef HAVE_SETREGID
 
 /* Define to 1 if you have the `setresgid' function. */
 #undef HAVE_SETRESGID
 
 /* Define to 1 if you have the `setresuid' function. */
 #undef HAVE_SETRESUID
 
 /* Define to 1 if you have the `setreuid' function. */
 #undef HAVE_SETREUID
 
 /* Define to 1 if you have the `setrlimit' function. */
 #undef HAVE_SETRLIMIT
 
 /* Define to 1 if you have the `setsid' function. */
 #undef HAVE_SETSID
 
 /* Define to 1 if you have the `setutent' function. */
 #undef HAVE_SETUTENT
 
 /* Define to 1 if you have the `setutxdb' function. */
 #undef HAVE_SETUTXDB
 
 /* Define to 1 if you have the `setutxent' function. */
 #undef HAVE_SETUTXENT
 
 /* Define to 1 if you have the `setvbuf' function. */
 #undef HAVE_SETVBUF
 
 /* Define to 1 if you have the `set_id' function. */
 #undef HAVE_SET_ID
 
 /* Define to 1 if you have the `SHA256Update' function. */
 #undef HAVE_SHA256UPDATE
 
 /* Define to 1 if you have the <sha2.h> header file. */
 #undef HAVE_SHA2_H
 
 /* Define to 1 if you have the `SHA384Update' function. */
 #undef HAVE_SHA384UPDATE
 
 /* Define to 1 if you have the `SHA512Update' function. */
 #undef HAVE_SHA512UPDATE
 
 /* Define to 1 if you have the <shadow.h> header file. */
 #undef HAVE_SHADOW_H
 
 /* Define to 1 if you have the `sigaction' function. */
 #undef HAVE_SIGACTION
 
 /* Define to 1 if the system has the type `sighandler_t'. */
 #undef HAVE_SIGHANDLER_T
 
 /* Define to 1 if you have the `sigvec' function. */
 #undef HAVE_SIGVEC
 
 /* Define to 1 if the system has the type `sig_atomic_t'. */
 #undef HAVE_SIG_ATOMIC_T
 
 /* define if you have size_t data type */
 #undef HAVE_SIZE_T
 
 /* Define to 1 if you have the `snprintf' function. */
 #undef HAVE_SNPRINTF
 
 /* Define to 1 if you have the `socketpair' function. */
 #undef HAVE_SOCKETPAIR
 
 /* Have PEERCRED socket option */
 #undef HAVE_SO_PEERCRED
 
 /* define if you have ssize_t data type */
 #undef HAVE_SSIZE_T
 
 /* Fields in struct sockaddr_storage */
 #undef HAVE_SS_FAMILY_IN_SS
 
 /* Define if you have ut_ss in utmpx.h */
 #undef HAVE_SS_IN_UTMPX
 
 /* Define to 1 if you have the `statfs' function. */
 #undef HAVE_STATFS
 
 /* Define to 1 if you have the `statvfs' function. */
 #undef HAVE_STATVFS
 
 /* Define to 1 if you have the <stddef.h> header file. */
 #undef HAVE_STDDEF_H
 
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
 /* Define to 1 if you have the <stdio.h> header file. */
 #undef HAVE_STDIO_H
 
 /* Define to 1 if you have the <stdlib.h> header file. */
 #undef HAVE_STDLIB_H
 
 /* Define to 1 if you have the `strcasestr' function. */
 #undef HAVE_STRCASESTR
 
 /* Define to 1 if you have the `strdup' function. */
 #undef HAVE_STRDUP
 
 /* Define to 1 if you have the `strerror' function. */
 #undef HAVE_STRERROR
 
 /* Define to 1 if you have the `strftime' function. */
 #undef HAVE_STRFTIME
 
 /* Define to 1 if you have the <strings.h> header file. */
 #undef HAVE_STRINGS_H
 
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
 /* Define to 1 if you have the `strlcat' function. */
 #undef HAVE_STRLCAT
 
 /* Define to 1 if you have the `strlcpy' function. */
 #undef HAVE_STRLCPY
 
 /* Define to 1 if you have the `strmode' function. */
 #undef HAVE_STRMODE
 
 /* Define to 1 if you have the `strndup' function. */
 #undef HAVE_STRNDUP
 
 /* Define to 1 if you have the `strnlen' function. */
 #undef HAVE_STRNLEN
 
 /* Define to 1 if you have the `strnvis' function. */
 #undef HAVE_STRNVIS
 
 /* Define to 1 if you have the `strptime' function. */
 #undef HAVE_STRPTIME
 
 /* Define to 1 if you have the `strsep' function. */
 #undef HAVE_STRSEP
 
 /* Define to 1 if you have the `strsignal' function. */
 #undef HAVE_STRSIGNAL
 
 /* Define to 1 if you have the `strtoll' function. */
 #undef HAVE_STRTOLL
 
 /* Define to 1 if you have the `strtonum' function. */
 #undef HAVE_STRTONUM
 
 /* Define to 1 if you have the `strtoul' function. */
 #undef HAVE_STRTOUL
 
 /* Define to 1 if you have the `strtoull' function. */
 #undef HAVE_STRTOULL
 
 /* define if you have struct addrinfo data type */
 #undef HAVE_STRUCT_ADDRINFO
 
 /* define if you have struct in6_addr data type */
 #undef HAVE_STRUCT_IN6_ADDR
 
 /* Define to 1 if `pw_change' is a member of `struct passwd'. */
 #undef HAVE_STRUCT_PASSWD_PW_CHANGE
 
 /* Define to 1 if `pw_class' is a member of `struct passwd'. */
 #undef HAVE_STRUCT_PASSWD_PW_CLASS
 
 /* Define to 1 if `pw_expire' is a member of `struct passwd'. */
 #undef HAVE_STRUCT_PASSWD_PW_EXPIRE
 
 /* Define to 1 if `pw_gecos' is a member of `struct passwd'. */
 #undef HAVE_STRUCT_PASSWD_PW_GECOS
 
 /* Define to 1 if `fd' is a member of `struct pollfd'. */
 #undef HAVE_STRUCT_POLLFD_FD
 
 /* define if you have struct sockaddr_in6 data type */
 #undef HAVE_STRUCT_SOCKADDR_IN6
 
 /* Define to 1 if `sin6_scope_id' is a member of `struct sockaddr_in6'. */
 #undef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
 
 /* define if you have struct sockaddr_storage data type */
 #undef HAVE_STRUCT_SOCKADDR_STORAGE
 
 /* Define to 1 if `f_files' is a member of `struct statfs'. */
 #undef HAVE_STRUCT_STATFS_F_FILES
 
 /* Define to 1 if `f_flags' is a member of `struct statfs'. */
 #undef HAVE_STRUCT_STATFS_F_FLAGS
 
 /* Define to 1 if `st_blksize' is a member of `struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_BLKSIZE
 
 /* Define to 1 if `st_mtim' is a member of `struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_MTIM
 
 /* Define to 1 if `st_mtime' is a member of `struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_MTIME
 
 /* define if you have struct timespec */
 #undef HAVE_STRUCT_TIMESPEC
 
 /* define if you have struct timeval */
 #undef HAVE_STRUCT_TIMEVAL
 
 /* Define to 1 if you have the `swap32' function. */
 #undef HAVE_SWAP32
 
 /* Define to 1 if you have the `sysconf' function. */
 #undef HAVE_SYSCONF
 
 /* Define if you have syslen in utmpx.h */
 #undef HAVE_SYSLEN_IN_UTMPX
 
 /* Define to 1 if you have the <sys/audit.h> header file. */
 #undef HAVE_SYS_AUDIT_H
 
 /* Define to 1 if you have the <sys/bitypes.h> header file. */
 #undef HAVE_SYS_BITYPES_H
 
 /* Define to 1 if you have the <sys/bsdtty.h> header file. */
 #undef HAVE_SYS_BSDTTY_H
 
 /* Define to 1 if you have the <sys/byteorder.h> header file. */
 #undef HAVE_SYS_BYTEORDER_H
 
 /* Define to 1 if you have the <sys/capsicum.h> header file. */
 #undef HAVE_SYS_CAPSICUM_H
 
 /* Define to 1 if you have the <sys/cdefs.h> header file. */
 #undef HAVE_SYS_CDEFS_H
 
 /* Define to 1 if you have the <sys/dir.h> header file. */
 #undef HAVE_SYS_DIR_H
 
 /* Define if your system defines sys_errlist[] */
 #undef HAVE_SYS_ERRLIST
 
 /* Define to 1 if you have the <sys/file.h> header file. */
 #undef HAVE_SYS_FILE_H
 
 /* Define to 1 if you have the <sys/label.h> header file. */
 #undef HAVE_SYS_LABEL_H
 
 /* Define to 1 if you have the <sys/mman.h> header file. */
 #undef HAVE_SYS_MMAN_H
 
 /* Define to 1 if you have the <sys/mount.h> header file. */
 #undef HAVE_SYS_MOUNT_H
 
 /* Define to 1 if you have the <sys/ndir.h> header file. */
 #undef HAVE_SYS_NDIR_H
 
 /* Define if your system defines sys_nerr */
 #undef HAVE_SYS_NERR
 
 /* Define to 1 if you have the <sys/param.h> header file. */
 #undef HAVE_SYS_PARAM_H
 
 /* Define to 1 if you have the <sys/poll.h> header file. */
 #undef HAVE_SYS_POLL_H
 
 /* Define to 1 if you have the <sys/prctl.h> header file. */
 #undef HAVE_SYS_PRCTL_H
 
 /* Define to 1 if you have the <sys/procctl.h> header file. */
 #undef HAVE_SYS_PROCCTL_H
 
 /* Define to 1 if you have the <sys/pstat.h> header file. */
 #undef HAVE_SYS_PSTAT_H
 
 /* Define to 1 if you have the <sys/ptms.h> header file. */
 #undef HAVE_SYS_PTMS_H
 
 /* Define to 1 if you have the <sys/ptrace.h> header file. */
 #undef HAVE_SYS_PTRACE_H
 
 /* Define to 1 if you have the <sys/random.h> header file. */
 #undef HAVE_SYS_RANDOM_H
 
 /* Define to 1 if you have the <sys/select.h> header file. */
 #undef HAVE_SYS_SELECT_H
 
 /* Define to 1 if you have the <sys/statvfs.h> header file. */
 #undef HAVE_SYS_STATVFS_H
 
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
 /* Define to 1 if you have the <sys/stream.h> header file. */
 #undef HAVE_SYS_STREAM_H
 
 /* Define to 1 if you have the <sys/stropts.h> header file. */
 #undef HAVE_SYS_STROPTS_H
 
 /* Define to 1 if you have the <sys/strtio.h> header file. */
 #undef HAVE_SYS_STRTIO_H
 
 /* Define to 1 if you have the <sys/sysctl.h> header file. */
 #undef HAVE_SYS_SYSCTL_H
 
 /* Force use of sys/syslog.h on Ultrix */
 #undef HAVE_SYS_SYSLOG_H
 
 /* Define to 1 if you have the <sys/sysmacros.h> header file. */
 #undef HAVE_SYS_SYSMACROS_H
 
 /* Define to 1 if you have the <sys/timers.h> header file. */
 #undef HAVE_SYS_TIMERS_H
 
 /* Define to 1 if you have the <sys/time.h> header file. */
 #undef HAVE_SYS_TIME_H
 
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
 /* Define to 1 if you have the <sys/un.h> header file. */
 #undef HAVE_SYS_UN_H
 
 /* Define to 1 if you have the <sys/vfs.h> header file. */
 #undef HAVE_SYS_VFS_H
 
 /* Define to 1 if you have the `tcgetpgrp' function. */
 #undef HAVE_TCGETPGRP
 
 /* Define to 1 if you have the `tcsendbreak' function. */
 #undef HAVE_TCSENDBREAK
 
 /* Define to 1 if you have the `time' function. */
 #undef HAVE_TIME
 
 /* Define to 1 if you have the `timegm' function. */
 #undef HAVE_TIMEGM
 
 /* Define to 1 if you have the <time.h> header file. */
 #undef HAVE_TIME_H
 
 /* Define if you have ut_time in utmp.h */
 #undef HAVE_TIME_IN_UTMP
 
 /* Define if you have ut_time in utmpx.h */
 #undef HAVE_TIME_IN_UTMPX
 
 /* Define to 1 if you have the `timingsafe_bcmp' function. */
 #undef HAVE_TIMINGSAFE_BCMP
 
 /* Define to 1 if you have the <tmpdir.h> header file. */
 #undef HAVE_TMPDIR_H
 
 /* Define to 1 if you have the `truncate' function. */
 #undef HAVE_TRUNCATE
 
 /* Define to 1 if you have the <ttyent.h> header file. */
 #undef HAVE_TTYENT_H
 
 /* Define if you have ut_tv in utmp.h */
 #undef HAVE_TV_IN_UTMP
 
 /* Define if you have ut_tv in utmpx.h */
 #undef HAVE_TV_IN_UTMPX
 
 /* Define if you have ut_type in utmp.h */
 #undef HAVE_TYPE_IN_UTMP
 
 /* Define if you have ut_type in utmpx.h */
 #undef HAVE_TYPE_IN_UTMPX
 
 /* Define to 1 if you have the <ucred.h> header file. */
 #undef HAVE_UCRED_H
 
 /* Define to 1 if the system has the type `uintmax_t'. */
 #undef HAVE_UINTMAX_T
 
 /* define if you have uintxx_t data type */
 #undef HAVE_UINTXX_T
 
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
 /* Define to 1 if you have the `unsetenv' function. */
 #undef HAVE_UNSETENV
 
 /* Define to 1 if the system has the type `unsigned long long'. */
 #undef HAVE_UNSIGNED_LONG_LONG
 
 /* Define to 1 if you have the `updwtmp' function. */
 #undef HAVE_UPDWTMP
 
 /* Define to 1 if you have the `updwtmpx' function. */
 #undef HAVE_UPDWTMPX
 
 /* Define to 1 if you have the <usersec.h> header file. */
 #undef HAVE_USERSEC_H
 
 /* Define to 1 if you have the `user_from_uid' function. */
 #undef HAVE_USER_FROM_UID
 
 /* Define to 1 if you have the `usleep' function. */
 #undef HAVE_USLEEP
 
 /* Define to 1 if you have the <util.h> header file. */
 #undef HAVE_UTIL_H
 
 /* Define to 1 if you have the `utimensat' function. */
 #undef HAVE_UTIMENSAT
 
 /* Define to 1 if you have the `utimes' function. */
 #undef HAVE_UTIMES
 
 /* Define to 1 if you have the <utime.h> header file. */
 #undef HAVE_UTIME_H
 
 /* Define to 1 if you have the `utmpname' function. */
 #undef HAVE_UTMPNAME
 
 /* Define to 1 if you have the `utmpxname' function. */
 #undef HAVE_UTMPXNAME
 
 /* Define to 1 if you have the <utmpx.h> header file. */
 #undef HAVE_UTMPX_H
 
 /* Define to 1 if you have the <utmp.h> header file. */
 #undef HAVE_UTMP_H
 
 /* define if you have u_char data type */
 #undef HAVE_U_CHAR
 
 /* define if you have u_int data type */
 #undef HAVE_U_INT
 
 /* define if you have u_int64_t data type */
 #undef HAVE_U_INT64_T
 
 /* define if you have u_intxx_t data type */
 #undef HAVE_U_INTXX_T
 
 /* Define to 1 if you have the `vasprintf' function. */
 #undef HAVE_VASPRINTF
 
 /* Define if va_copy exists */
 #undef HAVE_VA_COPY
 
 /* Define to 1 if you have the <vis.h> header file. */
 #undef HAVE_VIS_H
 
 /* Define to 1 if you have the `vsnprintf' function. */
 #undef HAVE_VSNPRINTF
 
 /* Define to 1 if you have the `waitpid' function. */
 #undef HAVE_WAITPID
 
 /* Define to 1 if you have the `warn' function. */
 #undef HAVE_WARN
 
 /* Define to 1 if you have the <wchar.h> header file. */
 #undef HAVE_WCHAR_H
 
 /* Define to 1 if you have the `wcwidth' function. */
 #undef HAVE_WCWIDTH
 
 /* Define to 1 if you have the `_getlong' function. */
 #undef HAVE__GETLONG
 
 /* Define to 1 if you have the `_getpty' function. */
 #undef HAVE__GETPTY
 
 /* Define to 1 if you have the `_getshort' function. */
 #undef HAVE__GETSHORT
 
 /* Define if you have struct __res_state _res as an extern */
 #undef HAVE__RES_EXTERN
 
 /* Define to 1 if you have the `__b64_ntop' function. */
 #undef HAVE___B64_NTOP
 
 /* Define to 1 if you have the `__b64_pton' function. */
 #undef HAVE___B64_PTON
 
 /* Define if compiler implements __FUNCTION__ */
 #undef HAVE___FUNCTION__
 
 /* Define if libc defines __progname */
 #undef HAVE___PROGNAME
 
 /* Fields in struct sockaddr_storage */
 #undef HAVE___SS_FAMILY_IN_SS
 
 /* Define if __va_copy exists */
 #undef HAVE___VA_COPY
 
 /* Define if compiler implements __func__ */
 #undef HAVE___func__
 
 /* Define this if you are using the Heimdal version of Kerberos V5 */
 #undef HEIMDAL
 
 /* Define if you need to use IP address instead of hostname in $DISPLAY */
 #undef IPADDR_IN_DISPLAY
 
 /* Detect IPv4 in IPv6 mapped addresses and treat as IPv4 */
 #undef IPV4_IN_IPV6
 
 /* Define if your system choked on IP TOS setting */
 #undef IP_TOS_IS_BROKEN
 
 /* Define if you want Kerberos 5 support */
 #undef KRB5
 
 /* Define if pututxline updates lastlog too */
 #undef LASTLOG_WRITE_PUTUTXLINE
 
 /* Define to whatever link() returns for "not supported" if it doesn't return
    EOPNOTSUPP. */
 #undef LINK_OPNOTSUPP_ERRNO
 
 /* Adjust Linux out-of-memory killer */
 #undef LINUX_OOM_ADJUST
 
 /* max value of long long calculated by configure */
 #undef LLONG_MAX
 
 /* min value of long long calculated by configure */
 #undef LLONG_MIN
 
 /* Account locked with pw(1) */
 #undef LOCKED_PASSWD_PREFIX
 
 /* String used in /etc/passwd to denote locked account */
 #undef LOCKED_PASSWD_STRING
 
 /* String used in /etc/passwd to denote locked account */
 #undef LOCKED_PASSWD_SUBSTR
 
 /* Some systems need a utmpx entry for /bin/login to work */
 #undef LOGIN_NEEDS_UTMPX
 
 /* Set this to your mail directory if you do not have _PATH_MAILDIR */
 #undef MAIL_DIRECTORY
 
 /* Need setpgrp to for controlling tty */
 #undef NEED_SETPGRP
 
 /* compiler does not accept __attribute__ on prototype args */
 #undef NO_ATTRIBUTE_ON_PROTOTYPE_ARGS
 
 /* compiler does not accept __attribute__ on return types */
 #undef NO_ATTRIBUTE_ON_RETURN_TYPE
 
 /* SA_RESTARTed signals do no interrupt select */
 #undef NO_SA_RESTART
 
 /* Define to disable UID restoration test */
 #undef NO_UID_RESTORATION_TEST
 
 /* Define if X11 doesn't support AF_UNIX sockets on that system */
 #undef NO_X11_UNIX_SOCKETS
 
 /* Define if EVP_DigestUpdate returns void */
 #undef OPENSSL_EVP_DIGESTUPDATE_VOID
 
 /* OpenSSL has ECC */
 #undef OPENSSL_HAS_ECC
 
 /* libcrypto has ed25519 support */
 #undef OPENSSL_HAS_ED25519
 
 /* libcrypto has NID_X9_62_prime256v1 */
 #undef OPENSSL_HAS_NISTP256
 
 /* libcrypto has NID_secp384r1 */
 #undef OPENSSL_HAS_NISTP384
 
 /* libcrypto has NID_secp521r1 */
 #undef OPENSSL_HAS_NISTP521
 
 /* libcrypto is missing AES 192 and 256 bit functions */
 #undef OPENSSL_LOBOTOMISED_AES
 
 /* Define if you want the OpenSSL internally seeded PRNG only */
 #undef OPENSSL_PRNG_ONLY
 
 /* Define to the address where bug reports for this package should be sent. */
 #undef PACKAGE_BUGREPORT
 
 /* Define to the full name of this package. */
 #undef PACKAGE_NAME
 
 /* Define to the full name and version of this package. */
 #undef PACKAGE_STRING
 
 /* Define to the one symbol short name of this package. */
 #undef PACKAGE_TARNAME
 
 /* Define to the home page for this package. */
 #undef PACKAGE_URL
 
 /* Define to the version of this package. */
 #undef PACKAGE_VERSION
 
 /* Define if you are using Solaris-derived PAM which passes pam_messages to
    the conversation function with an extra level of indirection */
 #undef PAM_SUN_CODEBASE
 
 /* Work around problematic Linux PAM modules handling of PAM_TTY */
 #undef PAM_TTY_KLUDGE
 
 /* must supply username to passwd */
 #undef PASSWD_NEEDS_USERNAME
 
 /* System dirs owned by bin (uid 2) */
 #undef PLATFORM_SYS_DIR_UID
 
 /* Port number of PRNGD/EGD random number socket */
 #undef PRNGD_PORT
 
 /* Location of PRNGD/EGD random number socket */
 #undef PRNGD_SOCKET
 
 /* read(1) can return 0 for a non-closed fd */
 #undef PTY_ZEROREAD
 
 /* Sandbox using capsicum */
 #undef SANDBOX_CAPSICUM
 
 /* Sandbox using Darwin sandbox_init(3) */
 #undef SANDBOX_DARWIN
 
 /* no privsep sandboxing */
 #undef SANDBOX_NULL
 
 /* Sandbox using pledge(2) */
 #undef SANDBOX_PLEDGE
 
 /* Sandbox using setrlimit(2) */
 #undef SANDBOX_RLIMIT
 
 /* Sandbox using seccomp filter */
 #undef SANDBOX_SECCOMP_FILTER
 
 /* setrlimit RLIMIT_FSIZE works */
 #undef SANDBOX_SKIP_RLIMIT_FSIZE
 
 /* define if setrlimit RLIMIT_NOFILE breaks things */
 #undef SANDBOX_SKIP_RLIMIT_NOFILE
 
 /* Sandbox using Solaris/Illumos privileges */
 #undef SANDBOX_SOLARIS
 
 /* Sandbox using systrace(4) */
 #undef SANDBOX_SYSTRACE
 
 /* Specify the system call convention in use */
 #undef SECCOMP_AUDIT_ARCH
 
 /* Define if your platform breaks doing a seteuid before a setuid */
 #undef SETEUID_BREAKS_SETUID
 
 /* The size of `int', as computed by sizeof. */
 #undef SIZEOF_INT
 
 /* The size of `long int', as computed by sizeof. */
 #undef SIZEOF_LONG_INT
 
 /* The size of `long long int', as computed by sizeof. */
 #undef SIZEOF_LONG_LONG_INT
 
 /* The size of `short int', as computed by sizeof. */
 #undef SIZEOF_SHORT_INT
 
 /* The size of `time_t', as computed by sizeof. */
 #undef SIZEOF_TIME_T
 
 /* Define as const if snprintf() can declare const char *fmt */
 #undef SNPRINTF_CONST
 
 /* sockaddr_in has sin_len */
 #undef SOCK_HAS_LEN
 
 /* Define to a Set Process Title type if your system is supported by
    bsd-setproctitle.c */
 #undef SPT_TYPE
 
 /* Define if sshd somehow reacquires a controlling TTY after setsid() */
 #undef SSHD_ACQUIRES_CTTY
 
 /* sshd PAM service name */
 #undef SSHD_PAM_SERVICE
 
 /* Define if pam_chauthtok wants real uid set to the unpriv'ed user */
 #undef SSHPAM_CHAUTHTOK_NEEDS_RUID
 
 /* Use audit debugging module */
 #undef SSH_AUDIT_EVENTS
 
 /* Windows is sensitive to read buffer size */
 #undef SSH_IOBUFSZ
 
 /* non-privileged user for privilege separation */
 #undef SSH_PRIVSEP_USER
 
 /* Use tunnel device compatibility to OpenBSD */
 #undef SSH_TUN_COMPAT_AF
 
 /* Open tunnel devices the FreeBSD way */
 #undef SSH_TUN_FREEBSD
 
 /* Open tunnel devices the Linux tun/tap way */
 #undef SSH_TUN_LINUX
 
 /* No layer 2 tunnel support */
 #undef SSH_TUN_NO_L2
 
 /* Open tunnel devices the OpenBSD way */
 #undef SSH_TUN_OPENBSD
 
 /* Prepend the address family to IP tunnel traffic */
 #undef SSH_TUN_PREPEND_AF
 
 /* Define to 1 if all of the C90 standard headers exist (not just the ones
    required in a freestanding environment). This macro is provided for
    backward compatibility; new code need not use it. */
 #undef STDC_HEADERS
 
 /* Define if you want a different $PATH for the superuser */
 #undef SUPERUSER_PATH
 
 /* syslog_r function is safe to use in in a signal handler */
 #undef SYSLOG_R_SAFE_IN_SIGHAND
 
 /* Support routing domains using Linux VRF */
 #undef SYS_RDOMAIN_LINUX
 
 /* Support passwords > 8 chars */
 #undef UNIXWARE_LONG_PASSWORDS
 
 /* Specify default $PATH */
 #undef USER_PATH
 
 /* Define this if you want to use libkafs' AFS support */
 #undef USE_AFS
 
 /* Use BSM audit module */
 #undef USE_BSM_AUDIT
 
 /* Use btmp to log bad logins */
 #undef USE_BTMP
 
 /* Use libedit for sftp */
 #undef USE_LIBEDIT
 
 /* Use Linux audit module */
 #undef USE_LINUX_AUDIT
 
 /* Enable OpenSSL engine support */
 #undef USE_OPENSSL_ENGINE
 
 /* Define if you want to enable PAM support */
 #undef USE_PAM
 
 /* Use PIPES instead of a socketpair() */
 #undef USE_PIPES
 
 /* Define if you have Solaris privileges */
 #undef USE_SOLARIS_PRIVS
 
 /* Define if you have Solaris process contracts */
 #undef USE_SOLARIS_PROCESS_CONTRACTS
 
 /* Define if you have Solaris projects */
 #undef USE_SOLARIS_PROJECTS
 
 /* compiler variable declarations after code */
 #undef VARIABLE_DECLARATION_AFTER_CODE
 
 /* compiler supports variable length arrays */
 #undef VARIABLE_LENGTH_ARRAYS
 
 /* Define if you shouldn't strip 'tty' from your ttyname in [uw]tmp */
 #undef WITH_ABBREV_NO_TTY
 
 /* Define if you want to enable AIX4's authenticate function */
 #undef WITH_AIXAUTHENTICATE
 
+/* Define if to enable DSA keys. */
+#undef WITH_DSA
+
 /* Define if you have/want arrays (cluster-wide session management, not C
    arrays) */
 #undef WITH_IRIX_ARRAY
 
 /* Define if you want IRIX audit trails */
 #undef WITH_IRIX_AUDIT
 
 /* Define if you want IRIX kernel jobs */
 #undef WITH_IRIX_JOBS
 
 /* Define if you want IRIX project management */
 #undef WITH_IRIX_PROJECT
 
 /* use libcrypto for cryptography */
 #undef WITH_OPENSSL
 
 /* Define if you want SELinux support. */
 #undef WITH_SELINUX
 
 /* Enable zlib */
 #undef WITH_ZLIB
 
 /* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
    significant byte first (like Motorola and SPARC, unlike Intel). */
 #if defined AC_APPLE_UNIVERSAL_BUILD
 # if defined __BIG_ENDIAN__
 #  define WORDS_BIGENDIAN 1
 # endif
 #else
 # ifndef WORDS_BIGENDIAN
 #  undef WORDS_BIGENDIAN
 # endif
 #endif
 
 /* Define if xauth is found in your path */
 #undef XAUTH_PATH
 
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
 /* log for bad login attempts */
 #undef _PATH_BTMP
 
 /* Full path of your "passwd" program */
 #undef _PATH_PASSWD_PROG
 
 /* Specify location of ssh.pid */
 #undef _PATH_SSH_PIDDIR
 
 /* Define if we don't have struct __res_state in resolv.h */
 #undef __res_state
 
 /* Define to rpl_calloc if the replacement function should be used. */
 #undef calloc
 
 /* Define to `__inline__' or `__inline' if that's what the C compiler
    calls it, or to nothing if 'inline' is not supported under any name.  */
 #ifndef __cplusplus
 #undef inline
 #endif
 
 /* Define to rpl_malloc if the replacement function should be used. */
 #undef malloc
 
 /* Define to rpl_realloc if the replacement function should be used. */
 #undef realloc
 
 /* type to use in place of socklen_t if not defined */
 #undef socklen_t
diff --git a/configure b/configure
index f0ece416be2a..f43a58af5ba2 100755
--- a/configure
+++ b/configure
@@ -1,27031 +1,27459 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.71 for OpenSSH Portable.
 #
 # Report bugs to <openssh-unix-dev@mindrot.org>.
 #
 #
 # Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
 # Inc.
 #
 #
 # This configure script is free software; the Free Software Foundation
 # gives unlimited permission to copy, distribute and modify it.
 ## -------------------- ##
 ## M4sh Initialization. ##
 ## -------------------- ##
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
 as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else $as_nop
   case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
 esac
 fi
 
 
 
 # Reset variables that may have inherited troublesome values from
 # the environment.
 
 # IFS needs to be set, to space, tab, and newline, in precisely that order.
 # (If _AS_PATH_WALK were called with IFS unset, it would have the
 # side effect of setting IFS to empty, thus disabling word splitting.)
 # Quoting is to prevent editors from complaining about space-tab.
 as_nl='
 '
 export as_nl
 IFS=" ""	$as_nl"
 
 PS1='$ '
 PS2='> '
 PS4='+ '
 
 # Ensure predictable behavior from utilities with locale-dependent output.
 LC_ALL=C
 export LC_ALL
 LANGUAGE=C
 export LANGUAGE
 
 # We cannot yet rely on "unset" to work, but we need these variables
 # to be unset--not just set to an empty or harmless value--now, to
 # avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
 # also avoids known problems related to "unset" and subshell syntax
 # in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
 for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
 do eval test \${$as_var+y} \
   && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
 done
 
 # Ensure that fds 0, 1, and 2 are open.
 if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
 if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
 if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
 
 # The user is always right.
 if ${PATH_SEPARATOR+false} :; then
   PATH_SEPARATOR=:
   (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
     (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
       PATH_SEPARATOR=';'
   }
 fi
 
 
 # Find who we are.  Look in the path if we contain no directory separator.
 as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     test -r "$as_dir$0" && as_myself=$as_dir$0 && break
   done
 IFS=$as_save_IFS
 
      ;;
 esac
 # We did not find ourselves, most probably we were run as `sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
   printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
 
 # Use a proper internal environment variable to ensure we don't fall
   # into an infinite loop, continuously re-executing ourselves.
   if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
     _as_can_reexec=no; export _as_can_reexec;
     # We cannot yet assume a decent shell, so we have to provide a
 # neutralization value for shells without unset; and this also
 # works around shells that cannot unset nonexistent variables.
 # Preserve -v and -x to the replacement shell.
 BASH_ENV=/dev/null
 ENV=/dev/null
 (unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
 case $- in # ((((
   *v*x* | *x*v* ) as_opts=-vx ;;
   *v* ) as_opts=-v ;;
   *x* ) as_opts=-x ;;
   * ) as_opts= ;;
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed `exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
   fi
   # We don't want this to propagate to other subprocesses.
           { _as_can_reexec=; unset _as_can_reexec;}
 if test "x$CONFIG_SHELL" = x; then
   as_bourne_compatible="as_nop=:
 if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
 else \$as_nop
   case \`(set -o) 2>/dev/null\` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
 esac
 fi
 "
   as_required="as_fn_return () { (exit \$1); }
 as_fn_success () { as_fn_return 0; }
 as_fn_failure () { as_fn_return 1; }
 as_fn_ret_success () { return 0; }
 as_fn_ret_failure () { return 1; }
 
 exitcode=0
 as_fn_success || { exitcode=1; echo as_fn_success failed.; }
 as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
 as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
 as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
 if ( set x; as_fn_ret_success y && test x = \"\$1\" )
 then :
 
 else \$as_nop
   exitcode=1; echo positional parameters were not saved.
 fi
 test x\$exitcode = x0 || exit 1
 blah=\$(echo \$(echo blah))
 test x\"\$blah\" = xblah || exit 1
 test -x / || exit 1"
   as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
   as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
   eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
   test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
 test \$(( 1 + 1 )) = 2 || exit 1"
   if (eval "$as_required") 2>/dev/null
 then :
   as_have_required=yes
 else $as_nop
   as_have_required=no
 fi
   if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
 then :
 
 else $as_nop
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
   as_found=:
   case $as_dir in #(
 	 /*)
 	   for as_base in sh bash ksh sh5; do
 	     # Try only shells that exist, to save several forks.
 	     as_shell=$as_dir$as_base
 	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
 		    as_run=a "$as_shell" -c "$as_bourne_compatible""$as_required" 2>/dev/null
 then :
   CONFIG_SHELL=$as_shell as_have_required=yes
 		   if as_run=a "$as_shell" -c "$as_bourne_compatible""$as_suggested" 2>/dev/null
 then :
   break 2
 fi
 fi
 	   done;;
        esac
   as_found=false
 done
 IFS=$as_save_IFS
 if $as_found
 then :
 
 else $as_nop
   if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
 	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
 then :
   CONFIG_SHELL=$SHELL as_have_required=yes
 fi
 fi
 
 
       if test "x$CONFIG_SHELL" != x
 then :
   export CONFIG_SHELL
              # We cannot yet assume a decent shell, so we have to provide a
 # neutralization value for shells without unset; and this also
 # works around shells that cannot unset nonexistent variables.
 # Preserve -v and -x to the replacement shell.
 BASH_ENV=/dev/null
 ENV=/dev/null
 (unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
 case $- in # ((((
   *v*x* | *x*v* ) as_opts=-vx ;;
   *v* ) as_opts=-v ;;
   *x* ) as_opts=-x ;;
   * ) as_opts= ;;
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed `exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
 
     if test x$as_have_required = xno
 then :
   printf "%s\n" "$0: This script requires a shell more modern than all"
   printf "%s\n" "$0: the shells that I found on your system."
   if test ${ZSH_VERSION+y} ; then
     printf "%s\n" "$0: In particular, zsh $ZSH_VERSION has bugs and should"
     printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
   else
     printf "%s\n" "$0: Please tell bug-autoconf@gnu.org and
 $0: openssh-unix-dev@mindrot.org about your system,
 $0: including any error possibly output before this
 $0: message. Then install a modern shell, or manually run
 $0: the script under such a shell if you do have one."
   fi
   exit 1
 fi
 fi
 fi
 SHELL=${CONFIG_SHELL-/bin/sh}
 export SHELL
 # Unset more variables known to interfere with behavior of common tools.
 CLICOLOR_FORCE= GREP_OPTIONS=
 unset CLICOLOR_FORCE GREP_OPTIONS
 
 ## --------------------- ##
 ## M4sh Shell Functions. ##
 ## --------------------- ##
 # as_fn_unset VAR
 # ---------------
 # Portably unset VAR.
 as_fn_unset ()
 {
   { eval $1=; unset $1;}
 }
 as_unset=as_fn_unset
 
 
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
 as_fn_set_status ()
 {
   return $1
 } # as_fn_set_status
 
 # as_fn_exit STATUS
 # -----------------
 # Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
 as_fn_exit ()
 {
   set +e
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
 # as_fn_nop
 # ---------
 # Do nothing but, unlike ":", preserve the value of $?.
 as_fn_nop ()
 {
   return $?
 }
 as_nop=as_fn_nop
 
 # as_fn_mkdir_p
 # -------------
 # Create "$as_dir" as a directory, including parents if necessary.
 as_fn_mkdir_p ()
 {
 
   case $as_dir in #(
   -*) as_dir=./$as_dir;;
   esac
   test -d "$as_dir" || eval $as_mkdir_p || {
     as_dirs=
     while :; do
       case $as_dir in #(
       *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
       as_dir=`$as_dirname -- "$as_dir" ||
 $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)[^/].*/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
       test -d "$as_dir" && break
     done
     test -z "$as_dirs" || eval "mkdir $as_dirs"
   } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
 
 
 } # as_fn_mkdir_p
 
 # as_fn_executable_p FILE
 # -----------------------
 # Test if FILE is an executable regular file.
 as_fn_executable_p ()
 {
   test -f "$1" && test -x "$1"
 } # as_fn_executable_p
 # as_fn_append VAR VALUE
 # ----------------------
 # Append the text in VALUE to the end of the definition contained in VAR. Take
 # advantage of any shell optimizations that allow amortized linear growth over
 # repeated appends, instead of the typical quadratic growth present in naive
 # implementations.
 if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
 then :
   eval 'as_fn_append ()
   {
     eval $1+=\$2
   }'
 else $as_nop
   as_fn_append ()
   {
     eval $1=\$$1\$2
   }
 fi # as_fn_append
 
 # as_fn_arith ARG...
 # ------------------
 # Perform arithmetic evaluation on the ARGs, and store the result in the
 # global $as_val. Take advantage of shells that can avoid forks. The arguments
 # must be portable across $(()) and expr.
 if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
 then :
   eval 'as_fn_arith ()
   {
     as_val=$(( $* ))
   }'
 else $as_nop
   as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
   }
 fi # as_fn_arith
 
 # as_fn_nop
 # ---------
 # Do nothing but, unlike ":", preserve the value of $?.
 as_fn_nop ()
 {
   return $?
 }
 as_nop=as_fn_nop
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
 # Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
 # provided, also output the error to LOG_FD, referencing LINENO. Then exit the
 # script with STATUS, using 1 if that was 0.
 as_fn_error ()
 {
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
   printf "%s\n" "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
 if expr a : '\(a\)' >/dev/null 2>&1 &&
    test "X`expr 00001 : '.*\(...\)'`" = X001; then
   as_expr=expr
 else
   as_expr=false
 fi
 
 if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
   as_basename=basename
 else
   as_basename=false
 fi
 
 if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
   as_dirname=dirname
 else
   as_dirname=false
 fi
 
 as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\/\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\/\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
 
 # Avoid depending upon Character Ranges.
 as_cr_letters='abcdefghijklmnopqrstuvwxyz'
 as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
 as_cr_Letters=$as_cr_letters$as_cr_LETTERS
 as_cr_digits='0123456789'
 as_cr_alnum=$as_cr_Letters$as_cr_digits
 
 
   as_lineno_1=$LINENO as_lineno_1a=$LINENO
   as_lineno_2=$LINENO as_lineno_2a=$LINENO
   eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
   test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
   # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
   sed -n '
     p
     /[$]LINENO/=
   ' <$as_myself |
     sed '
       s/[$]LINENO.*/&-/
       t lineno
       b
       :lineno
       N
       :loop
       s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
       t loop
       s/-\n.*//
     ' >$as_me.lineno &&
   chmod +x "$as_me.lineno" ||
     { printf "%s\n" "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
 
   # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
   # already done that, so ensure we don't try to do so again and fall
   # in an infinite loop.  This has already happened in practice.
   _as_can_reexec=no; export _as_can_reexec
   # Don't try to exec as it changes $[0], causing all sort of problems
   # (the dirname of $[0] is not the place where we might find the
   # original and so on.  Autoconf is especially sensitive to this).
   . "./$as_me.lineno"
   # Exit status is that of the last command.
   exit
 }
 
 
 # Determine whether it's possible to make 'echo' print without a newline.
 # These variables are no longer used directly by Autoconf, but are AC_SUBSTed
 # for compatibility with existing Makefiles.
 ECHO_C= ECHO_N= ECHO_T=
 case `echo -n x` in #(((((
 -n*)
   case `echo 'xy\c'` in
   *c*) ECHO_T='	';;	# ECHO_T is single tab character.
   xy)  ECHO_C='\c';;
   *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
        ECHO_T='	';;
   esac;;
 *)
   ECHO_N='-n';;
 esac
 
 # For backward compatibility with old third-party macros, we provide
 # the shell variables $as_echo and $as_echo_n.  New code should use
 # AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
 as_echo='printf %s\n'
 as_echo_n='printf %s'
 
 
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
 else
   rm -f conf$$.dir
   mkdir conf$$.dir 2>/dev/null
 fi
 if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
     # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
     # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
     # In both cases, we have to default to `cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
     as_ln_s=ln
   else
     as_ln_s='cp -pR'
   fi
 else
   as_ln_s='cp -pR'
 fi
 rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
 rmdir conf$$.dir 2>/dev/null
 
 if mkdir -p . 2>/dev/null; then
   as_mkdir_p='mkdir -p "$as_dir"'
 else
   test -d ./-p && rmdir ./-p
   as_mkdir_p=false
 fi
 
 as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
 as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
 
 # Sed expression to map a string onto a valid variable name.
 as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 test -n "$DJDIR" || exec 7<&0 </dev/null
 exec 6>&1
 
 # Name of the host.
 # hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
 # so uname gets run too.
 ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
 
 #
 # Initializations.
 #
 ac_default_prefix=/usr/local
 ac_clean_files=
 ac_config_libobj_dir=.
 LIBOBJS=
 cross_compiling=no
 subdirs=
 MFLAGS=
 MAKEFLAGS=
 
 # Identity of this package.
 PACKAGE_NAME='OpenSSH'
 PACKAGE_TARNAME='openssh'
 PACKAGE_VERSION='Portable'
 PACKAGE_STRING='OpenSSH Portable'
 PACKAGE_BUGREPORT='openssh-unix-dev@mindrot.org'
 PACKAGE_URL=''
 
 ac_unique_file="ssh.c"
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stddef.h>
 #ifdef HAVE_STDIO_H
 # include <stdio.h>
 #endif
 #ifdef HAVE_STDLIB_H
 # include <stdlib.h>
 #endif
 #ifdef HAVE_STRING_H
 # include <string.h>
 #endif
 #ifdef HAVE_INTTYPES_H
 # include <inttypes.h>
 #endif
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #ifdef HAVE_STRINGS_H
 # include <strings.h>
 #endif
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif"
 
 ac_header_c_list=
 ac_subst_vars='LTLIBOBJS
 CFLAGS_NOPIE
 LDFLAGS_NOPIE
 DROPBEARCONVERT
 DROPBEARKEY
 DBCLIENT
 DROPBEAR
 CONCH
 PUTTYGEN
 PLINK
 DEPEND
 UNSUPPORTED_ALGORITHMS
 TEST_MALLOC_OPTIONS
 TEST_SSH_UTF8
 TEST_SSH_IPV6
 piddir
 user_path
 mansubdir
 MANTYPE
 XAUTH_PATH
 STRIP_OPT
 xauth_path
 PRIVSEP_PATH
 CHANNELLIBS
 K5LIBS
 GSSLIBS
 KRB5CONF
 SSHDLIBS
 SSH_PRIVSEP_USER
 LIBFIDO2
 SK_DUMMY_LIBRARY
 OPENSSL_BIN
 openssl_bin
 PICFLAG
 LIBEDIT
 LDNSCONFIG
 LIBOBJS
 LD
 PATH_PASSWD_PROG
 STARTUP_SCRIPT_SHELL
 MAKE_PACKAGE_SUPPORTED
 PATH_USERADD_PROG
 PATH_GROUPADD_PROG
 MANFMT
 TEST_SHELL
 PKGCONFIG
 MANDOC
 NROFF
 GROFF
 SH
 TEST_MINUS_S_SH
 SED
 KILL
 CAT
 ac_ct_AR
 AR
 MKDIR_P
 EGREP
 GREP
 INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
 RANLIB
 CPP
 AWK
 host_os
 host_vendor
 host_cpu
 host
 build_os
 build_vendor
 build_cpu
 build
 OBJEXT
 EXEEXT
 ac_ct_CC
 CPPFLAGS
 LDFLAGS
 CFLAGS
 CC
 target_alias
 host_alias
 build_alias
 LIBS
 ECHO_T
 ECHO_N
 ECHO_C
 DEFS
 mandir
 localedir
 libdir
 psdir
 pdfdir
 dvidir
 htmldir
 infodir
 docdir
 oldincludedir
 includedir
 runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
 datadir
 datarootdir
 libexecdir
 sbindir
 bindir
 program_transform_name
 prefix
 exec_prefix
 PACKAGE_URL
 PACKAGE_BUGREPORT
 PACKAGE_STRING
 PACKAGE_VERSION
 PACKAGE_TARNAME
 PACKAGE_NAME
 PATH_SEPARATOR
 SHELL'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
 enable_largefile
 with_openssl
 with_stackprotect
 with_hardening
+with_retpoline
 with_rpath
 with_cflags
 with_cflags_after
 with_cppflags
 with_ldflags
 with_ldflags_after
 with_libs
 with_Werror
 with_solaris_contracts
 with_solaris_projects
 with_solaris_privs
 with_osfsia
 with_zlib
 with_zlib_version_check
 with_ldns
 with_libedit
 with_audit
 with_pie
 enable_pkcs11
 enable_security_key
 with_security_key_builtin
+enable_dsa_keys
 with_ssl_dir
 with_openssl_header_check
 with_ssl_engine
 with_prngd_port
 with_prngd_socket
 with_pam
 with_pam_service
 with_privsep_user
 with_sandbox
 with_selinux
 with_kerberos5
 with_privsep_path
 with_xauth
 enable_strip
 with_maildir
 with_mantype
 with_shadow
 with_ipaddr_display
 enable_etc_default_login
 with_default_path
 with_superuser_path
 with_4in6
 with_bsd_auth
 with_pid_dir
+enable_fd_passing
 enable_lastlog
 enable_utmp
 enable_utmpx
 enable_wtmp
 enable_wtmpx
 enable_libutil
 enable_pututline
 enable_pututxline
 with_lastlog
 '
       ac_precious_vars='build_alias
 host_alias
 target_alias
 CC
 CFLAGS
 LDFLAGS
 LIBS
 CPPFLAGS
 CPP'
 
 
 # Initialize some variables set by options.
 ac_init_help=
 ac_init_version=false
 ac_unrecognized_opts=
 ac_unrecognized_sep=
 # The variables have the same names as the options, with
 # dashes changed to underlines.
 cache_file=/dev/null
 exec_prefix=NONE
 no_create=
 no_recursion=
 prefix=NONE
 program_prefix=NONE
 program_suffix=NONE
 program_transform_name=s,x,x,
 silent=
 site=
 srcdir=
 verbose=
 x_includes=NONE
 x_libraries=NONE
 
 # Installation directory options.
 # These are left unexpanded so users can "make install exec_prefix=/foo"
 # and all the variables that are supposed to be based on exec_prefix
 # by default will actually change.
 # Use braces instead of parens because sh, perl, etc. also accept them.
 # (The list follows the same order as the GNU Coding Standards.)
 bindir='${exec_prefix}/bin'
 sbindir='${exec_prefix}/sbin'
 libexecdir='${exec_prefix}/libexec'
 datarootdir='${prefix}/share'
 datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
 runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
 infodir='${datarootdir}/info'
 htmldir='${docdir}'
 dvidir='${docdir}'
 pdfdir='${docdir}'
 psdir='${docdir}'
 libdir='${exec_prefix}/lib'
 localedir='${datarootdir}/locale'
 mandir='${datarootdir}/man'
 
 ac_prev=
 ac_dashdash=
 for ac_option
 do
   # If the previous option needs an argument, assign it.
   if test -n "$ac_prev"; then
     eval $ac_prev=\$ac_option
     ac_prev=
     continue
   fi
 
   case $ac_option in
   *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
   *=)   ac_optarg= ;;
   *)    ac_optarg=yes ;;
   esac
 
   case $ac_dashdash$ac_option in
   --)
     ac_dashdash=yes ;;
 
   -bindir | --bindir | --bindi | --bind | --bin | --bi)
     ac_prev=bindir ;;
   -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
     bindir=$ac_optarg ;;
 
   -build | --build | --buil | --bui | --bu)
     ac_prev=build_alias ;;
   -build=* | --build=* | --buil=* | --bui=* | --bu=*)
     build_alias=$ac_optarg ;;
 
   -cache-file | --cache-file | --cache-fil | --cache-fi \
   | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
     ac_prev=cache_file ;;
   -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
   | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
     cache_file=$ac_optarg ;;
 
   --config-cache | -C)
     cache_file=config.cache ;;
 
   -datadir | --datadir | --datadi | --datad)
     ac_prev=datadir ;;
   -datadir=* | --datadir=* | --datadi=* | --datad=*)
     datadir=$ac_optarg ;;
 
   -datarootdir | --datarootdir | --datarootdi | --datarootd | --dataroot \
   | --dataroo | --dataro | --datar)
     ac_prev=datarootdir ;;
   -datarootdir=* | --datarootdir=* | --datarootdi=* | --datarootd=* \
   | --dataroot=* | --dataroo=* | --dataro=* | --datar=*)
     datarootdir=$ac_optarg ;;
 
   -disable-* | --disable-*)
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
 "*) ;;
       *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--disable-$ac_useropt_orig"
 	 ac_unrecognized_sep=', ';;
     esac
     eval enable_$ac_useropt=no ;;
 
   -docdir | --docdir | --docdi | --doc | --do)
     ac_prev=docdir ;;
   -docdir=* | --docdir=* | --docdi=* | --doc=* | --do=*)
     docdir=$ac_optarg ;;
 
   -dvidir | --dvidir | --dvidi | --dvid | --dvi | --dv)
     ac_prev=dvidir ;;
   -dvidir=* | --dvidir=* | --dvidi=* | --dvid=* | --dvi=* | --dv=*)
     dvidir=$ac_optarg ;;
 
   -enable-* | --enable-*)
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
 "*) ;;
       *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--enable-$ac_useropt_orig"
 	 ac_unrecognized_sep=', ';;
     esac
     eval enable_$ac_useropt=\$ac_optarg ;;
 
   -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
   | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
   | --exec | --exe | --ex)
     ac_prev=exec_prefix ;;
   -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
   | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
   | --exec=* | --exe=* | --ex=*)
     exec_prefix=$ac_optarg ;;
 
   -gas | --gas | --ga | --g)
     # Obsolete; use --with-gas.
     with_gas=yes ;;
 
   -help | --help | --hel | --he | -h)
     ac_init_help=long ;;
   -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
     ac_init_help=recursive ;;
   -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
     ac_init_help=short ;;
 
   -host | --host | --hos | --ho)
     ac_prev=host_alias ;;
   -host=* | --host=* | --hos=* | --ho=*)
     host_alias=$ac_optarg ;;
 
   -htmldir | --htmldir | --htmldi | --htmld | --html | --htm | --ht)
     ac_prev=htmldir ;;
   -htmldir=* | --htmldir=* | --htmldi=* | --htmld=* | --html=* | --htm=* \
   | --ht=*)
     htmldir=$ac_optarg ;;
 
   -includedir | --includedir | --includedi | --included | --include \
   | --includ | --inclu | --incl | --inc)
     ac_prev=includedir ;;
   -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
   | --includ=* | --inclu=* | --incl=* | --inc=*)
     includedir=$ac_optarg ;;
 
   -infodir | --infodir | --infodi | --infod | --info | --inf)
     ac_prev=infodir ;;
   -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
     infodir=$ac_optarg ;;
 
   -libdir | --libdir | --libdi | --libd)
     ac_prev=libdir ;;
   -libdir=* | --libdir=* | --libdi=* | --libd=*)
     libdir=$ac_optarg ;;
 
   -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
   | --libexe | --libex | --libe)
     ac_prev=libexecdir ;;
   -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
   | --libexe=* | --libex=* | --libe=*)
     libexecdir=$ac_optarg ;;
 
   -localedir | --localedir | --localedi | --localed | --locale)
     ac_prev=localedir ;;
   -localedir=* | --localedir=* | --localedi=* | --localed=* | --locale=*)
     localedir=$ac_optarg ;;
 
   -localstatedir | --localstatedir | --localstatedi | --localstated \
   | --localstate | --localstat | --localsta | --localst | --locals)
     ac_prev=localstatedir ;;
   -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
   | --localstate=* | --localstat=* | --localsta=* | --localst=* | --locals=*)
     localstatedir=$ac_optarg ;;
 
   -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
     ac_prev=mandir ;;
   -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
     mandir=$ac_optarg ;;
 
   -nfp | --nfp | --nf)
     # Obsolete; use --without-fp.
     with_fp=no ;;
 
   -no-create | --no-create | --no-creat | --no-crea | --no-cre \
   | --no-cr | --no-c | -n)
     no_create=yes ;;
 
   -no-recursion | --no-recursion | --no-recursio | --no-recursi \
   | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
     no_recursion=yes ;;
 
   -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
   | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
   | --oldin | --oldi | --old | --ol | --o)
     ac_prev=oldincludedir ;;
   -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
   | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
   | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
     oldincludedir=$ac_optarg ;;
 
   -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
     ac_prev=prefix ;;
   -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
     prefix=$ac_optarg ;;
 
   -program-prefix | --program-prefix | --program-prefi | --program-pref \
   | --program-pre | --program-pr | --program-p)
     ac_prev=program_prefix ;;
   -program-prefix=* | --program-prefix=* | --program-prefi=* \
   | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
     program_prefix=$ac_optarg ;;
 
   -program-suffix | --program-suffix | --program-suffi | --program-suff \
   | --program-suf | --program-su | --program-s)
     ac_prev=program_suffix ;;
   -program-suffix=* | --program-suffix=* | --program-suffi=* \
   | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
     program_suffix=$ac_optarg ;;
 
   -program-transform-name | --program-transform-name \
   | --program-transform-nam | --program-transform-na \
   | --program-transform-n | --program-transform- \
   | --program-transform | --program-transfor \
   | --program-transfo | --program-transf \
   | --program-trans | --program-tran \
   | --progr-tra | --program-tr | --program-t)
     ac_prev=program_transform_name ;;
   -program-transform-name=* | --program-transform-name=* \
   | --program-transform-nam=* | --program-transform-na=* \
   | --program-transform-n=* | --program-transform-=* \
   | --program-transform=* | --program-transfor=* \
   | --program-transfo=* | --program-transf=* \
   | --program-trans=* | --program-tran=* \
   | --progr-tra=* | --program-tr=* | --program-t=*)
     program_transform_name=$ac_optarg ;;
 
   -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
     ac_prev=pdfdir ;;
   -pdfdir=* | --pdfdir=* | --pdfdi=* | --pdfd=* | --pdf=* | --pd=*)
     pdfdir=$ac_optarg ;;
 
   -psdir | --psdir | --psdi | --psd | --ps)
     ac_prev=psdir ;;
   -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
     psdir=$ac_optarg ;;
 
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
   -runstatedir | --runstatedir | --runstatedi | --runstated \
   | --runstate | --runstat | --runsta | --runst | --runs \
   | --run | --ru | --r)
     ac_prev=runstatedir ;;
   -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
   | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
   | --run=* | --ru=* | --r=*)
     runstatedir=$ac_optarg ;;
 
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
   | --sbi=* | --sb=*)
     sbindir=$ac_optarg ;;
 
   -sharedstatedir | --sharedstatedir | --sharedstatedi \
   | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
   | --sharedst | --shareds | --shared | --share | --shar \
   | --sha | --sh)
     ac_prev=sharedstatedir ;;
   -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
   | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
   | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
   | --sha=* | --sh=*)
     sharedstatedir=$ac_optarg ;;
 
   -site | --site | --sit)
     ac_prev=site ;;
   -site=* | --site=* | --sit=*)
     site=$ac_optarg ;;
 
   -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
     ac_prev=srcdir ;;
   -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
     srcdir=$ac_optarg ;;
 
   -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
   | --syscon | --sysco | --sysc | --sys | --sy)
     ac_prev=sysconfdir ;;
   -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
   | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
     sysconfdir=$ac_optarg ;;
 
   -target | --target | --targe | --targ | --tar | --ta | --t)
     ac_prev=target_alias ;;
   -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
     target_alias=$ac_optarg ;;
 
   -v | -verbose | --verbose | --verbos | --verbo | --verb)
     verbose=yes ;;
 
   -version | --version | --versio | --versi | --vers | -V)
     ac_init_version=: ;;
 
   -with-* | --with-*)
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
 "*) ;;
       *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--with-$ac_useropt_orig"
 	 ac_unrecognized_sep=', ';;
     esac
     eval with_$ac_useropt=\$ac_optarg ;;
 
   -without-* | --without-*)
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
       as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
 "*) ;;
       *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
 	 ac_unrecognized_sep=', ';;
     esac
     eval with_$ac_useropt=no ;;
 
   --x)
     # Obsolete; use --with-x.
     with_x=yes ;;
 
   -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
   | --x-incl | --x-inc | --x-in | --x-i)
     ac_prev=x_includes ;;
   -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
   | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
     x_includes=$ac_optarg ;;
 
   -x-libraries | --x-libraries | --x-librarie | --x-librari \
   | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
     ac_prev=x_libraries ;;
   -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
   | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
     x_libraries=$ac_optarg ;;
 
   -*) as_fn_error $? "unrecognized option: \`$ac_option'
 Try \`$0 --help' for more information"
     ;;
 
   *=*)
     ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
     # Reject names that are not valid shell variable names.
     case $ac_envvar in #(
       '' | [0-9]* | *[!_$as_cr_alnum]* )
       as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
     esac
     eval $ac_envvar=\$ac_optarg
     export $ac_envvar ;;
 
   *)
     # FIXME: should be removed in autoconf 3.0.
     printf "%s\n" "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
       printf "%s\n" "$as_me: WARNING: invalid host type: $ac_option" >&2
     : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
     ;;
 
   esac
 done
 
 if test -n "$ac_prev"; then
   ac_option=--`echo $ac_prev | sed 's/_/-/g'`
   as_fn_error $? "missing argument to $ac_option"
 fi
 
 if test -n "$ac_unrecognized_opts"; then
   case $enable_option_checking in
     no) ;;
     fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
     *)     printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
   esac
 fi
 
 # Check all directory arguments for consistency.
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
 		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
   case $ac_val in
     */ )
       ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
       eval $ac_var=\$ac_val;;
   esac
   # Be sure to have absolute directory names.
   case $ac_val in
     [\\/$]* | ?:[\\/]* )  continue;;
     NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
   esac
   as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
 done
 
 # There might be people who depend on the old broken behavior: `$host'
 # used to hold the argument of --host etc.
 # FIXME: To remove some day.
 build=$build_alias
 host=$host_alias
 target=$target_alias
 
 # FIXME: To remove some day.
 if test "x$host_alias" != x; then
   if test "x$build_alias" = x; then
     cross_compiling=maybe
   elif test "x$build_alias" != "x$host_alias"; then
     cross_compiling=yes
   fi
 fi
 
 ac_tool_prefix=
 test -n "$host_alias" && ac_tool_prefix=$host_alias-
 
 test "$silent" = yes && exec 6>/dev/null
 
 
 ac_pwd=`pwd` && test -n "$ac_pwd" &&
 ac_ls_di=`ls -di .` &&
 ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
   as_fn_error $? "working directory cannot be determined"
 test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
   as_fn_error $? "pwd does not report name of working directory"
 
 
 # Find the source files, if location was not specified.
 if test -z "$srcdir"; then
   ac_srcdir_defaulted=yes
   # Try the directory containing this script, then the parent directory.
   ac_confdir=`$as_dirname -- "$as_myself" ||
 $as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_myself" : 'X\(//\)[^/]' \| \
 	 X"$as_myself" : 'X\(//\)$' \| \
 	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X"$as_myself" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)[^/].*/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
   srcdir=$ac_confdir
   if test ! -r "$srcdir/$ac_unique_file"; then
     srcdir=..
   fi
 else
   ac_srcdir_defaulted=no
 fi
 if test ! -r "$srcdir/$ac_unique_file"; then
   test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
   as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
 fi
 ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
 ac_abs_confdir=`(
 	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
 	pwd)`
 # When building in place, set srcdir=.
 if test "$ac_abs_confdir" = "$ac_pwd"; then
   srcdir=.
 fi
 # Remove unnecessary trailing slashes from srcdir.
 # Double slashes in file names in object file debugging info
 # mess up M-x gdb in Emacs.
 case $srcdir in
 */) srcdir=`expr "X$srcdir" : 'X\(.*[^/]\)' \| "X$srcdir" : 'X\(.*\)'`;;
 esac
 for ac_var in $ac_precious_vars; do
   eval ac_env_${ac_var}_set=\${${ac_var}+set}
   eval ac_env_${ac_var}_value=\$${ac_var}
   eval ac_cv_env_${ac_var}_set=\${${ac_var}+set}
   eval ac_cv_env_${ac_var}_value=\$${ac_var}
 done
 
 #
 # Report the --help message.
 #
 if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
 \`configure' configures OpenSSH Portable to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
 To assign environment variables (e.g., CC, CFLAGS...), specify them as
 VAR=VALUE.  See below for descriptions of some of the useful variables.
 
 Defaults for the options are specified in brackets.
 
 Configuration:
   -h, --help              display this help and exit
       --help=short        display options specific to this package
       --help=recursive    display the short help of all the included packages
   -V, --version           display version information and exit
   -q, --quiet, --silent   do not print \`checking ...' messages
       --cache-file=FILE   cache test results in FILE [disabled]
   -C, --config-cache      alias for \`--cache-file=config.cache'
   -n, --no-create         do not create output files
       --srcdir=DIR        find the sources in DIR [configure dir or \`..']
 
 Installation directories:
   --prefix=PREFIX         install architecture-independent files in PREFIX
                           [$ac_default_prefix]
   --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                           [PREFIX]
 
 By default, \`make install' will install all the files in
 \`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
 an installation prefix other than \`$ac_default_prefix' using \`--prefix',
 for instance \`--prefix=\$HOME'.
 
 For better control, use the options below.
 
 Fine tuning of the installation directories:
   --bindir=DIR            user executables [EPREFIX/bin]
   --sbindir=DIR           system admin executables [EPREFIX/sbin]
   --libexecdir=DIR        program executables [EPREFIX/libexec]
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
   --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
   --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
   --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
   --docdir=DIR            documentation root [DATAROOTDIR/doc/openssh]
   --htmldir=DIR           html documentation [DOCDIR]
   --dvidir=DIR            dvi documentation [DOCDIR]
   --pdfdir=DIR            pdf documentation [DOCDIR]
   --psdir=DIR             ps documentation [DOCDIR]
 _ACEOF
 
   cat <<\_ACEOF
 
 System types:
   --build=BUILD     configure for building on BUILD [guessed]
   --host=HOST       cross-compile to build programs to run on HOST [BUILD]
 _ACEOF
 fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
      short | recursive ) echo "Configuration of OpenSSH Portable:";;
    esac
   cat <<\_ACEOF
 
 Optional Features:
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --disable-largefile     omit support for large files
   --disable-pkcs11        disable PKCS#11 support code [no]
   --disable-security-key  disable U2F/FIDO support code no
+  --disable-dsa-keys      disable DSA key support no
   --disable-strip         Disable calling strip(1) on install
   --disable-etc-default-login Disable using PATH from /etc/default/login no
+  --disable-fd-passing    disable file descriptor passsing no
   --disable-lastlog       disable use of lastlog even if detected no
   --disable-utmp          disable use of utmp even if detected no
   --disable-utmpx         disable use of utmpx even if detected no
   --disable-wtmp          disable use of wtmp even if detected no
   --disable-wtmpx         disable use of wtmpx even if detected no
   --disable-libutil       disable use of libutil (login() etc.) no
   --disable-pututline     disable use of pututline() etc. (uwtmp) no
   --disable-pututxline    disable use of pututxline() etc. (uwtmpx) no
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --without-openssl       Disable use of OpenSSL; use only limited internal crypto **EXPERIMENTAL**
   --without-stackprotect  Don't use compiler's stack protection
   --without-hardening     Don't use toolchain hardening flags
+  --without-retpoline     Enable retpoline spectre mitigation
   --without-rpath         Disable auto-added -R linker paths
   --with-cflags           Specify additional flags to pass to compiler
   --with-cflags-after     Specify additional flags to pass to compiler after configure
   --with-cppflags         Specify additional flags to pass to preprocessor
   --with-ldflags          Specify additional flags to pass to linker
   --with-ldflags-after    Specify additional flags to pass to linker after configure
   --with-libs             Specify additional libraries to link with
   --with-Werror           Build main code with -Werror
   --with-solaris-contracts Enable Solaris process contracts (experimental)
   --with-solaris-projects Enable Solaris projects (experimental)
   --with-solaris-privs    Enable Solaris/Illumos privileges (experimental)
   --with-osfsia           Enable Digital Unix SIA
   --with-zlib=PATH        Use zlib in PATH
   --without-zlib-version-check Disable zlib version check
   --with-ldns[=PATH]      Use ldns for DNSSEC support (optionally in PATH)
   --with-libedit[=PATH]   Enable libedit support for sftp
   --with-audit=module     Enable audit support (modules=debug,bsm,linux)
   --with-pie              Build Position Independent Executables if possible
   --with-security-key-builtin include builtin U2F/FIDO support
   --with-ssl-dir=PATH     Specify path to OpenSSL installation
   --without-openssl-header-check Disable OpenSSL version consistency check
   --with-ssl-engine       Enable OpenSSL (hardware) ENGINE support
   --with-prngd-port=PORT  read entropy from PRNGD/EGD TCP localhost:PORT
   --with-prngd-socket=FILE read entropy from PRNGD/EGD socket FILE (default=/var/run/egd-pool)
   --with-pam              Enable PAM support
   --with-pam-service=name Specify PAM service name
   --with-privsep-user=user Specify non-privileged user for privilege separation
   --with-sandbox=style    Specify privilege separation sandbox (no, capsicum, darwin, rlimit, seccomp_filter, systrace, pledge)
   --with-selinux          Enable SELinux support
   --with-kerberos5=PATH   Enable Kerberos 5 support
   --with-privsep-path=xxx Path for privilege separation chroot (default=/var/empty)
   --with-xauth=PATH       Specify path to xauth program
   --with-maildir=/path/to/mail    Specify your system mail directory
   --with-mantype=man|cat|doc  Set man page type
   --without-shadow        Disable shadow password support
   --with-ipaddr-display   Use ip address instead of hostname in $DISPLAY
   --with-default-path=    Specify default $PATH environment for server
   --with-superuser-path=  Specify different path for super-user
   --with-4in6             Check for and convert IPv4 in IPv6 mapped addresses
   --with-bsd-auth         Enable BSD auth support
   --with-pid-dir=PATH     Specify location of sshd.pid file
   --with-lastlog=FILE|DIR specify lastlog location common locations
 
 Some influential environment variables:
   CC          C compiler command
   CFLAGS      C compiler flags
   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
               nonstandard directory <lib dir>
   LIBS        libraries to pass to the linker, e.g. -l<library>
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
   CPP         C preprocessor
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
 Report bugs to <openssh-unix-dev@mindrot.org>.
 _ACEOF
 ac_status=$?
 fi
 
 if test "$ac_init_help" = "recursive"; then
   # If there are subdirs, report their specific --help.
   for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
     test -d "$ac_dir" ||
       { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
       continue
     ac_builddir=.
 
 case "$ac_dir" in
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 *)
   ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
   ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
   esac ;;
 esac
 ac_abs_top_builddir=$ac_pwd
 ac_abs_builddir=$ac_pwd$ac_dir_suffix
 # for backward compatibility:
 ac_top_builddir=$ac_top_build_prefix
 
 case $srcdir in
   .)  # We are building in place.
     ac_srcdir=.
     ac_top_srcdir=$ac_top_builddir_sub
     ac_abs_top_srcdir=$ac_pwd ;;
   [\\/]* | ?:[\\/]* )  # Absolute name.
     ac_srcdir=$srcdir$ac_dir_suffix;
     ac_top_srcdir=$srcdir
     ac_abs_top_srcdir=$srcdir ;;
   *) # Relative name.
     ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
     ac_top_srcdir=$ac_top_build_prefix$srcdir
     ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
 esac
 ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
 
     cd "$ac_dir" || { ac_status=$?; continue; }
     # Check for configure.gnu first; this name is used for a wrapper for
     # Metaconfig's "Configure" on case-insensitive file systems.
     if test -f "$ac_srcdir/configure.gnu"; then
       echo &&
       $SHELL "$ac_srcdir/configure.gnu" --help=recursive
     elif test -f "$ac_srcdir/configure"; then
       echo &&
       $SHELL "$ac_srcdir/configure" --help=recursive
     else
       printf "%s\n" "$as_me: WARNING: no configuration information is in $ac_dir" >&2
     fi || ac_status=$?
     cd "$ac_pwd" || { ac_status=$?; break; }
   done
 fi
 
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 OpenSSH configure Portable
 generated by GNU Autoconf 2.71
 
 Copyright (C) 2021 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
   exit
 fi
 
 ## ------------------------ ##
 ## Autoconf initialization. ##
 ## ------------------------ ##
 
 # ac_fn_c_try_compile LINENO
 # --------------------------
 # Try to compile conftest.$ac_ext, and return whether this succeeded.
 ac_fn_c_try_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   rm -f conftest.$ac_objext conftest.beam
   if { { ac_try="$ac_compile"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
     grep -v '^ *+' conftest.err >conftest.er1
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        } && test -s conftest.$ac_objext
 then :
   ac_retval=0
 else $as_nop
   printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_compile
 
 # ac_fn_c_try_run LINENO
 # ----------------------
 # Try to run conftest.$ac_ext, and return whether this succeeded. Assumes that
 # executables *can* be run.
 ac_fn_c_try_run ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
   { { case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_try") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }
 then :
   ac_retval=0
 else $as_nop
   printf "%s\n" "$as_me: program exited with status $ac_status" >&5
        printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
        ac_retval=$ac_status
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_run
 
 # ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
 # -------------------------------------------------------
 # Tests whether HEADER exists and can be compiled using the include files in
 # INCLUDES, setting the cache variable VAR accordingly.
 ac_fn_c_check_header_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$3=yes"
 else $as_nop
   eval "$3=no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_compile
 
 # ac_fn_c_try_cpp LINENO
 # ----------------------
 # Try to preprocess conftest.$ac_ext, and return whether this succeeded.
 ac_fn_c_try_cpp ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if { { ac_try="$ac_cpp conftest.$ac_ext"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
     grep -v '^ *+' conftest.err >conftest.er1
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } > conftest.i && {
 	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        }
 then :
   ac_retval=0
 else $as_nop
   printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
     ac_retval=1
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_cpp
 
 # ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR
 # ------------------------------------------------------------------
 # Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
 # accordingly. Pass EXTRA-OPTIONS to the compiler, using FLAG-VAR.
 ac_fn_check_decl ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   as_decl_name=`echo $2|sed 's/ *(.*//'`
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
 printf %s "checking whether $as_decl_name is declared... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
   eval ac_save_FLAGS=\$$6
   as_fn_append $6 " $5"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 #ifndef $as_decl_name
 #ifdef __cplusplus
   (void) $as_decl_use;
 #else
   (void) $as_decl_name;
 #endif
 #endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$3=yes"
 else $as_nop
   eval "$3=no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   eval $6=\$ac_save_FLAGS
 
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_check_decl
 
 # ac_fn_c_try_link LINENO
 # -----------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded.
 ac_fn_c_try_link ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   rm -f conftest.$ac_objext conftest.beam conftest$ac_exeext
   if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
     grep -v '^ *+' conftest.err >conftest.er1
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext && {
 	 test "$cross_compiling" = yes ||
 	 test -x conftest$ac_exeext
        }
 then :
   ac_retval=0
 else $as_nop
   printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
   # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
   # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
 
 # ac_fn_c_check_func LINENO FUNC VAR
 # ----------------------------------
 # Tests whether FUNC exists, setting the cache variable VAR accordingly
 ac_fn_c_check_func ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 /* Define $2 to an innocuous variant, in case <limits.h> declares $2.
    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
 #define $2 innocuous_$2
 
 /* System header to define __stub macros and hopefully few prototypes,
    which can conflict with char $2 (); below.  */
 
 #include <limits.h>
 #undef $2
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 #ifdef __cplusplus
 extern "C"
 #endif
 char $2 ();
 /* The GNU C library defines this for functions which it implements
     to always fail with ENOSYS.  Some functions are actually named
     something starting with __ and the normal name is an alias.  */
 #if defined __stub_$2 || defined __stub___$2
 choke me
 #endif
 
 int
 main (void)
 {
 return $2 ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   eval "$3=yes"
 else $as_nop
   eval "$3=no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_func
 
 # ac_fn_c_check_type LINENO TYPE VAR INCLUDES
 # -------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
 # variable VAR accordingly.
 ac_fn_c_check_type ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   eval "$3=no"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 if (sizeof ($2))
 	 return 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 if (sizeof (($2)))
 	    return 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 else $as_nop
   eval "$3=yes"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_type
 
 # ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
 # ----------------------------------------------------
 # Tries to find if the field MEMBER exists in type AGGR, after including
 # INCLUDES, setting cache variable VAR accordingly.
 ac_fn_c_check_member ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
 printf %s "checking for $2.$3... " >&6; }
 if eval test \${$4+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $5
 int
 main (void)
 {
 static $2 ac_aggr;
 if (ac_aggr.$3)
 return 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$4=yes"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $5
 int
 main (void)
 {
 static $2 ac_aggr;
 if (sizeof ac_aggr.$3)
 return 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$4=yes"
 else $as_nop
   eval "$4=no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$4
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_member
 
 # ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
 # --------------------------------------------
 # Tries to find the compile-time value of EXPR in a program that includes
 # INCLUDES, setting VAR accordingly. Returns whether the value could be
 # computed
 ac_fn_c_compute_int ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if test "$cross_compiling" = yes; then
     # Depending upon the size, compute the lo and hi bounds.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 static int test_array [1 - 2 * !(($2) >= 0)];
 test_array [0] = 0;
 return test_array [0];
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_lo=0 ac_mid=0
   while :; do
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 static int test_array [1 - 2 * !(($2) <= $ac_mid)];
 test_array [0] = 0;
 return test_array [0];
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_hi=$ac_mid; break
 else $as_nop
   as_fn_arith $ac_mid + 1 && ac_lo=$as_val
 			if test $ac_lo -le $ac_mid; then
 			  ac_lo= ac_hi=
 			  break
 			fi
 			as_fn_arith 2 '*' $ac_mid + 1 && ac_mid=$as_val
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   done
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 static int test_array [1 - 2 * !(($2) < 0)];
 test_array [0] = 0;
 return test_array [0];
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_hi=-1 ac_mid=-1
   while :; do
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 static int test_array [1 - 2 * !(($2) >= $ac_mid)];
 test_array [0] = 0;
 return test_array [0];
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_lo=$ac_mid; break
 else $as_nop
   as_fn_arith '(' $ac_mid ')' - 1 && ac_hi=$as_val
 			if test $ac_mid -le $ac_hi; then
 			  ac_lo= ac_hi=
 			  break
 			fi
 			as_fn_arith 2 '*' $ac_mid && ac_mid=$as_val
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   done
 else $as_nop
   ac_lo= ac_hi=
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 # Binary search between lo and hi bounds.
 while test "x$ac_lo" != "x$ac_hi"; do
   as_fn_arith '(' $ac_hi - $ac_lo ')' / 2 + $ac_lo && ac_mid=$as_val
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
 main (void)
 {
 static int test_array [1 - 2 * !(($2) <= $ac_mid)];
 test_array [0] = 0;
 return test_array [0];
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_hi=$ac_mid
 else $as_nop
   as_fn_arith '(' $ac_mid ')' + 1 && ac_lo=$as_val
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 done
 case $ac_lo in #((
 ?*) eval "$3=\$ac_lo"; ac_retval=0 ;;
 '') ac_retval=1 ;;
 esac
   else
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 static long int longval (void) { return $2; }
 static unsigned long int ulongval (void) { return $2; }
 #include <stdio.h>
 #include <stdlib.h>
 int
 main (void)
 {
 
   FILE *f = fopen ("conftest.val", "w");
   if (! f)
     return 1;
   if (($2) < 0)
     {
       long int i = longval ();
       if (i != ($2))
 	return 1;
       fprintf (f, "%ld", i);
     }
   else
     {
       unsigned long int i = ulongval ();
       if (i != ($2))
 	return 1;
       fprintf (f, "%lu", i);
     }
   /* Do not output a trailing newline, as this causes \r\n confusion
      on some platforms.  */
   return ferror (f) || fclose (f) != 0;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   echo >>conftest.val; read $3 <conftest.val; ac_retval=0
 else $as_nop
   ac_retval=1
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 rm -f conftest.val
 
   fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_compute_int
 ac_configure_args_raw=
 for ac_arg
 do
   case $ac_arg in
   *\'*)
     ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
   esac
   as_fn_append ac_configure_args_raw " '$ac_arg'"
 done
 
 case $ac_configure_args_raw in
   *$as_nl*)
     ac_safe_unquote= ;;
   *)
     ac_unsafe_z='|&;<>()$`\\"*?[ ''	' # This string ends in space, tab.
     ac_unsafe_a="$ac_unsafe_z#~"
     ac_safe_unquote="s/ '\\([^$ac_unsafe_a][^$ac_unsafe_z]*\\)'/ \\1/g"
     ac_configure_args_raw=`      printf "%s\n" "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
 esac
 
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by OpenSSH $as_me Portable, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
 
 _ACEOF
 exec 5>>config.log
 {
 cat <<_ASUNAME
 ## --------- ##
 ## Platform. ##
 ## --------- ##
 
 hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
 uname -m = `(uname -m) 2>/dev/null || echo unknown`
 uname -r = `(uname -r) 2>/dev/null || echo unknown`
 uname -s = `(uname -s) 2>/dev/null || echo unknown`
 uname -v = `(uname -v) 2>/dev/null || echo unknown`
 
 /usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
 /bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
 
 /bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
 /usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
 /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
 /usr/bin/hostinfo      = `(/usr/bin/hostinfo) 2>/dev/null      || echo unknown`
 /bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
 /usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
 /bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
 
 _ASUNAME
 
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     printf "%s\n" "PATH: $as_dir"
   done
 IFS=$as_save_IFS
 
 } >&5
 
 cat >&5 <<_ACEOF
 
 
 ## ----------- ##
 ## Core tests. ##
 ## ----------- ##
 
 _ACEOF
 
 
 # Keep a trace of the command line.
 # Strip out --no-create and --no-recursion so they do not pile up.
 # Strip out --silent because we don't want to record it for future runs.
 # Also quote any args containing shell meta-characters.
 # Make two passes to allow for proper duplicate-argument suppression.
 ac_configure_args=
 ac_configure_args0=
 ac_configure_args1=
 ac_must_keep_next=false
 for ac_pass in 1 2
 do
   for ac_arg
   do
     case $ac_arg in
     -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
     -q | -quiet | --quiet | --quie | --qui | --qu | --q \
     | -silent | --silent | --silen | --sile | --sil)
       continue ;;
     *\'*)
       ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     case $ac_pass in
     1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
     2)
       as_fn_append ac_configure_args1 " '$ac_arg'"
       if test $ac_must_keep_next = true; then
 	ac_must_keep_next=false # Got value, back to normal.
       else
 	case $ac_arg in
 	  *=* | --config-cache | -C | -disable-* | --disable-* \
 	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
 	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
 	  | -with-* | --with-* | -without-* | --without-* | --x)
 	    case "$ac_configure_args0 " in
 	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
 	    esac
 	    ;;
 	  -* ) ac_must_keep_next=true ;;
 	esac
       fi
       as_fn_append ac_configure_args " '$ac_arg'"
       ;;
     esac
   done
 done
 { ac_configure_args0=; unset ac_configure_args0;}
 { ac_configure_args1=; unset ac_configure_args1;}
 
 # When interrupted or exit'd, cleanup temporary files, and complete
 # config.log.  We remove comments because anyway the quotes in there
 # would cause problems or look ugly.
 # WARNING: Use '\'' to represent an apostrophe within the trap.
 # WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
 trap 'exit_status=$?
   # Sanitize IFS.
   IFS=" ""	$as_nl"
   # Save into config.log some information that might help in debugging.
   {
     echo
 
     printf "%s\n" "## ---------------- ##
 ## Cache variables. ##
 ## ---------------- ##"
     echo
     # The following way of writing the cache mishandles newlines in values,
 (
   for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
     eval ac_val=\$$ac_var
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
       *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
 printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
       BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
       *) { eval $ac_var=; unset $ac_var;} ;;
       esac ;;
     esac
   done
   (set) 2>&1 |
     case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
       sed -n \
 	"s/'\''/'\''\\\\'\'''\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
       ;; #(
     *)
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
     sort
 )
     echo
 
     printf "%s\n" "## ----------------- ##
 ## Output variables. ##
 ## ----------------- ##"
     echo
     for ac_var in $ac_subst_vars
     do
       eval ac_val=\$$ac_var
       case $ac_val in
       *\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
       esac
       printf "%s\n" "$ac_var='\''$ac_val'\''"
     done | sort
     echo
 
     if test -n "$ac_subst_files"; then
       printf "%s\n" "## ------------------- ##
 ## File substitutions. ##
 ## ------------------- ##"
       echo
       for ac_var in $ac_subst_files
       do
 	eval ac_val=\$$ac_var
 	case $ac_val in
 	*\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
 	esac
 	printf "%s\n" "$ac_var='\''$ac_val'\''"
       done | sort
       echo
     fi
 
     if test -s confdefs.h; then
       printf "%s\n" "## ----------- ##
 ## confdefs.h. ##
 ## ----------- ##"
       echo
       cat confdefs.h
       echo
     fi
     test "$ac_signal" != 0 &&
       printf "%s\n" "$as_me: caught signal $ac_signal"
     printf "%s\n" "$as_me: exit $exit_status"
   } >&5
   rm -f core *.core core.conftest.* &&
     rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
     exit $exit_status
 ' 0
 for ac_signal in 1 2 13 15; do
   trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
 done
 ac_signal=0
 
 # confdefs.h avoids OS command line length limits that DEFS can exceed.
 rm -f -r conftest* confdefs.h
 
 printf "%s\n" "/* confdefs.h */" > confdefs.h
 
 # Predefined preprocessor variables.
 
 printf "%s\n" "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
 
 printf "%s\n" "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
 
 printf "%s\n" "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
 
 printf "%s\n" "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
 
 printf "%s\n" "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
 
 printf "%s\n" "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
 
 
 # Let the site file select an alternate cache file if it wants to.
 # Prefer an explicitly selected file to automatically selected ones.
 if test -n "$CONFIG_SITE"; then
   ac_site_files="$CONFIG_SITE"
 elif test "x$prefix" != xNONE; then
   ac_site_files="$prefix/share/config.site $prefix/etc/config.site"
 else
   ac_site_files="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
 fi
 
 for ac_site_file in $ac_site_files
 do
   case $ac_site_file in #(
   */*) :
      ;; #(
   *) :
     ac_site_file=./$ac_site_file ;;
 esac
   if test -f "$ac_site_file" && test -r "$ac_site_file"; then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
 printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
       || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
 See \`config.log' for more details" "$LINENO" 5; }
   fi
 done
 
 if test -r "$cache_file"; then
   # Some versions of bash will fail to source /dev/null (special files
   # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
   if test /dev/null != "$cache_file" && test -f "$cache_file"; then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
 printf "%s\n" "$as_me: loading cache $cache_file" >&6;}
     case $cache_file in
       [\\/]* | ?:[\\/]* ) . "$cache_file";;
       *)                      . "./$cache_file";;
     esac
   fi
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
 printf "%s\n" "$as_me: creating cache $cache_file" >&6;}
   >$cache_file
 fi
 
 # Test code for whether the C compiler supports C89 (global declarations)
 ac_c_conftest_c89_globals='
 /* Does the compiler advertise C89 conformance?
    Do not test the value of __STDC__, because some compilers set it to 0
    while being otherwise adequately conformant. */
 #if !defined __STDC__
 # error "Compiler does not advertise C89 conformance"
 #endif
 
 #include <stddef.h>
 #include <stdarg.h>
 struct stat;
 /* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
 struct buf { int x; };
 struct buf * (*rcsopen) (struct buf *, struct stat *, int);
 static char *e (p, i)
      char **p;
      int i;
 {
   return p[i];
 }
 static char *f (char * (*g) (char **, int), char **p, ...)
 {
   char *s;
   va_list v;
   va_start (v,p);
   s = g (p, va_arg (v,int));
   va_end (v);
   return s;
 }
 
 /* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
    function prototypes and stuff, but not \xHH hex character constants.
    These do not provoke an error unfortunately, instead are silently treated
    as an "x".  The following induces an error, until -std is added to get
    proper ANSI mode.  Curiously \x00 != x always comes out true, for an
    array size at least.  It is necessary to write \x00 == 0 to get something
    that is true only with -std.  */
 int osf4_cc_array ['\''\x00'\'' == 0 ? 1 : -1];
 
 /* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
    inside strings and character constants.  */
 #define FOO(x) '\''x'\''
 int xlc6_cc_array[FOO(a) == '\''x'\'' ? 1 : -1];
 
 int test (int i, double x);
 struct s1 {int (*f) (int a);};
 struct s2 {int (*f) (double a);};
 int pairnames (int, char **, int *(*)(struct buf *, struct stat *, int),
                int, int);'
 
 # Test code for whether the C compiler supports C89 (body of main).
 ac_c_conftest_c89_main='
 ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
 '
 
 # Test code for whether the C compiler supports C99 (global declarations)
 ac_c_conftest_c99_globals='
 // Does the compiler advertise C99 conformance?
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
 # error "Compiler does not advertise C99 conformance"
 #endif
 
 #include <stdbool.h>
 extern int puts (const char *);
 extern int printf (const char *, ...);
 extern int dprintf (int, const char *, ...);
 extern void *malloc (size_t);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
 // FILE and stderr.
 #define debug(...) dprintf (2, __VA_ARGS__)
 #define showlist(...) puts (#__VA_ARGS__)
 #define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
 static void
 test_varargs_macros (void)
 {
   int x = 1234;
   int y = 5678;
   debug ("Flag");
   debug ("X = %d\n", x);
   showlist (The first, second, and third items.);
   report (x>y, "x is %d but y is %d", x, y);
 }
 
 // Check long long types.
 #define BIG64 18446744073709551615ull
 #define BIG32 4294967295ul
 #define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
 #if !BIG_OK
   #error "your preprocessor is broken"
 #endif
 #if BIG_OK
 #else
   #error "your preprocessor is broken"
 #endif
 static long long int bignum = -9223372036854775807LL;
 static unsigned long long int ubignum = BIG64;
 
 struct incomplete_array
 {
   int datasize;
   double data[];
 };
 
 struct named_init {
   int number;
   const wchar_t *name;
   double average;
 };
 
 typedef const char *ccp;
 
 static inline int
 test_restrict (ccp restrict text)
 {
   // See if C++-style comments work.
   // Iterate through items via the restricted pointer.
   // Also check for declarations in for loops.
   for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
     continue;
   return 0;
 }
 
 // Check varargs and va_copy.
 static bool
 test_varargs (const char *format, ...)
 {
   va_list args;
   va_start (args, format);
   va_list args_copy;
   va_copy (args_copy, args);
 
   const char *str = "";
   int number = 0;
   float fnumber = 0;
 
   while (*format)
     {
       switch (*format++)
 	{
 	case '\''s'\'': // string
 	  str = va_arg (args_copy, const char *);
 	  break;
 	case '\''d'\'': // int
 	  number = va_arg (args_copy, int);
 	  break;
 	case '\''f'\'': // float
 	  fnumber = va_arg (args_copy, double);
 	  break;
 	default:
 	  break;
 	}
     }
   va_end (args_copy);
   va_end (args);
 
   return *str && number && fnumber;
 }
 '
 
 # Test code for whether the C compiler supports C99 (body of main).
 ac_c_conftest_c99_main='
   // Check bool.
   _Bool success = false;
   success |= (argc != 0);
 
   // Check restrict.
   if (test_restrict ("String literal") == 0)
     success = true;
   char *restrict newvar = "Another string";
 
   // Check varargs.
   success &= test_varargs ("s, d'\'' f .", "string", 65, 34.234);
   test_varargs_macros ();
 
   // Check flexible array members.
   struct incomplete_array *ia =
     malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
   ia->datasize = 10;
   for (int i = 0; i < ia->datasize; ++i)
     ia->data[i] = i * 1.234;
 
   // Check named initializers.
   struct named_init ni = {
     .number = 34,
     .name = L"Test wide string",
     .average = 543.34343,
   };
 
   ni.number = 58;
 
   int dynamic_array[ni.number];
   dynamic_array[0] = argv[0][0];
   dynamic_array[ni.number - 1] = 543;
 
   // work around unused variable warnings
   ok |= (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == '\''x'\''
 	 || dynamic_array[ni.number - 1] != 543);
 '
 
 # Test code for whether the C compiler supports C11 (global declarations)
 ac_c_conftest_c11_globals='
 // Does the compiler advertise C11 conformance?
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
 # error "Compiler does not advertise C11 conformance"
 #endif
 
 // Check _Alignas.
 char _Alignas (double) aligned_as_double;
 char _Alignas (0) no_special_alignment;
 extern char aligned_as_int;
 char _Alignas (0) _Alignas (int) aligned_as_int;
 
 // Check _Alignof.
 enum
 {
   int_alignment = _Alignof (int),
   int_array_alignment = _Alignof (int[100]),
   char_alignment = _Alignof (char)
 };
 _Static_assert (0 < -_Alignof (int), "_Alignof is signed");
 
 // Check _Noreturn.
 int _Noreturn does_not_return (void) { for (;;) continue; }
 
 // Check _Static_assert.
 struct test_static_assert
 {
   int x;
   _Static_assert (sizeof (int) <= sizeof (long int),
                   "_Static_assert does not work in struct");
   long int y;
 };
 
 // Check UTF-8 literals.
 #define u8 syntax error!
 char const utf8_literal[] = u8"happens to be ASCII" "another string";
 
 // Check duplicate typedefs.
 typedef long *long_ptr;
 typedef long int *long_ptr;
 typedef long_ptr long_ptr;
 
 // Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
 struct anonymous
 {
   union {
     struct { int i; int j; };
     struct { int k; long int l; } w;
   };
   int m;
 } v1;
 '
 
 # Test code for whether the C compiler supports C11 (body of main).
 ac_c_conftest_c11_main='
   _Static_assert ((offsetof (struct anonymous, i)
 		   == offsetof (struct anonymous, w.k)),
 		  "Anonymous union alignment botch");
   v1.i = 2;
   v1.w.k = 5;
   ok |= v1.i != 5;
 '
 
 # Test code for whether the C compiler supports C11 (complete).
 ac_c_conftest_c11_program="${ac_c_conftest_c89_globals}
 ${ac_c_conftest_c99_globals}
 ${ac_c_conftest_c11_globals}
 
 int
 main (int argc, char **argv)
 {
   int ok = 0;
   ${ac_c_conftest_c89_main}
   ${ac_c_conftest_c99_main}
   ${ac_c_conftest_c11_main}
   return ok;
 }
 "
 
 # Test code for whether the C compiler supports C99 (complete).
 ac_c_conftest_c99_program="${ac_c_conftest_c89_globals}
 ${ac_c_conftest_c99_globals}
 
 int
 main (int argc, char **argv)
 {
   int ok = 0;
   ${ac_c_conftest_c89_main}
   ${ac_c_conftest_c99_main}
   return ok;
 }
 "
 
 # Test code for whether the C compiler supports C89 (complete).
 ac_c_conftest_c89_program="${ac_c_conftest_c89_globals}
 
 int
 main (int argc, char **argv)
 {
   int ok = 0;
   ${ac_c_conftest_c89_main}
   return ok;
 }
 "
 
 as_fn_append ac_header_c_list " stdio.h stdio_h HAVE_STDIO_H"
 as_fn_append ac_header_c_list " stdlib.h stdlib_h HAVE_STDLIB_H"
 as_fn_append ac_header_c_list " string.h string_h HAVE_STRING_H"
 as_fn_append ac_header_c_list " inttypes.h inttypes_h HAVE_INTTYPES_H"
 as_fn_append ac_header_c_list " stdint.h stdint_h HAVE_STDINT_H"
 as_fn_append ac_header_c_list " strings.h strings_h HAVE_STRINGS_H"
 as_fn_append ac_header_c_list " sys/stat.h sys_stat_h HAVE_SYS_STAT_H"
 as_fn_append ac_header_c_list " sys/types.h sys_types_h HAVE_SYS_TYPES_H"
 as_fn_append ac_header_c_list " unistd.h unistd_h HAVE_UNISTD_H"
 
 # Auxiliary files required by this configure script.
 ac_aux_files="install-sh config.guess config.sub"
 
 # Locations in which to look for auxiliary files.
 ac_aux_dir_candidates="${srcdir}${PATH_SEPARATOR}${srcdir}/..${PATH_SEPARATOR}${srcdir}/../.."
 
 # Search for a directory containing all of the required auxiliary files,
 # $ac_aux_files, from the $PATH-style list $ac_aux_dir_candidates.
 # If we don't find one directory that contains all the files we need,
 # we report the set of missing files from the *first* directory in
 # $ac_aux_dir_candidates and give up.
 ac_missing_aux_files=""
 ac_first_candidate=:
 printf "%s\n" "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in $ac_aux_dir_candidates
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
   as_found=:
 
   printf "%s\n" "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
   ac_aux_dir_found=yes
   ac_install_sh=
   for ac_aux in $ac_aux_files
   do
     # As a special case, if "install-sh" is required, that requirement
     # can be satisfied by any of "install-sh", "install.sh", or "shtool",
     # and $ac_install_sh is set appropriately for whichever one is found.
     if test x"$ac_aux" = x"install-sh"
     then
       if test -f "${as_dir}install-sh"; then
         printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
         ac_install_sh="${as_dir}install-sh -c"
       elif test -f "${as_dir}install.sh"; then
         printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
         ac_install_sh="${as_dir}install.sh -c"
       elif test -f "${as_dir}shtool"; then
         printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
         ac_install_sh="${as_dir}shtool install -c"
       else
         ac_aux_dir_found=no
         if $ac_first_candidate; then
           ac_missing_aux_files="${ac_missing_aux_files} install-sh"
         else
           break
         fi
       fi
     else
       if test -f "${as_dir}${ac_aux}"; then
         printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
       else
         ac_aux_dir_found=no
         if $ac_first_candidate; then
           ac_missing_aux_files="${ac_missing_aux_files} ${ac_aux}"
         else
           break
         fi
       fi
     fi
   done
   if test "$ac_aux_dir_found" = yes; then
     ac_aux_dir="$as_dir"
     break
   fi
   ac_first_candidate=false
 
   as_found=false
 done
 IFS=$as_save_IFS
 if $as_found
 then :
 
 else $as_nop
   as_fn_error $? "cannot find required auxiliary files:$ac_missing_aux_files" "$LINENO" 5
 fi
 
 
 # These three variables are undocumented and unsupported,
 # and are intended to be withdrawn in a future Autoconf release.
 # They can cause serious problems if a builder's source tree is in a directory
 # whose full name contains unusual characters.
 if test -f "${ac_aux_dir}config.guess"; then
   ac_config_guess="$SHELL ${ac_aux_dir}config.guess"
 fi
 if test -f "${ac_aux_dir}config.sub"; then
   ac_config_sub="$SHELL ${ac_aux_dir}config.sub"
 fi
 if test -f "$ac_aux_dir/configure"; then
   ac_configure="$SHELL ${ac_aux_dir}configure"
 fi
 
 # Check that the precious variables saved in the cache have kept the same
 # value.
 ac_cache_corrupted=false
 for ac_var in $ac_precious_vars; do
   eval ac_old_set=\$ac_cv_env_${ac_var}_set
   eval ac_new_set=\$ac_env_${ac_var}_set
   eval ac_old_val=\$ac_cv_env_${ac_var}_value
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
 printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
 printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
       if test "x$ac_old_val" != "x$ac_new_val"; then
 	# differences in whitespace do not lead to failure.
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
 	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
 printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
 	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
 printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
 printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
 printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
   if test "$ac_new_set" = set; then
     case $ac_new_val in
     *\'*) ac_arg=$ac_var=`printf "%s\n" "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
     *) ac_arg=$ac_var=$ac_new_val ;;
     esac
     case " $ac_configure_args " in
       *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
       *) as_fn_append ac_configure_args " '$ac_arg'" ;;
     esac
   fi
 done
 if $ac_cache_corrupted; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
 printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
   as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
 	    and start over" "$LINENO" 5
 fi
 ## -------------------- ##
 ## Main body of script. ##
 ## -------------------- ##
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
 
 
 # Check for stale configure as early as possible.
 for i in $srcdir/configure.ac $srcdir/m4/*.m4; do
 	if test "$i" -nt "$srcdir/configure"; then
 		as_fn_error $? "$i newer than configure, run autoreconf" "$LINENO" 5
 	fi
 done
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 ac_config_headers="$ac_config_headers config.h"
 
 
 
 
 
 
 
 
 
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 if test -n "$ac_tool_prefix"; then
   for ac_prog in cc gcc clang
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
 printf "%s\n" "$CC" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
     test -n "$CC" && break
   done
 fi
 if test -z "$CC"; then
   ac_ct_CC=$CC
   for ac_prog in cc gcc clang
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="$ac_prog"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
 printf "%s\n" "$ac_ct_CC" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
   test -n "$ac_ct_CC" && break
 done
 
   if test "x$ac_ct_CC" = x; then
     CC=""
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
   fi
 fi
 
 
 test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
 See \`config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
 printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
 set X $ac_compile
 ac_compiler=$2
 for ac_option in --version -v -V -qversion -version; do
   { { ac_try="$ac_compiler $ac_option >&5"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compiler $ac_option >&5") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
     sed '10a\
 ... rest of stderr output deleted ...
          10q' conftest.err >conftest.er1
     cat conftest.er1 >&5
   fi
   rm -f conftest.er1 conftest.err
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 done
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
 # Try to create an executable without -o first, disregard a.out.
 # It will help us diagnose broken compilers, and finding out an intuition
 # of exeext.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
 printf %s "checking whether the C compiler works... " >&6; }
 ac_link_default=`printf "%s\n" "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
 
 # The possible output files:
 ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
 
 ac_rmfiles=
 for ac_file in $ac_files
 do
   case $ac_file in
     *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
     * ) ac_rmfiles="$ac_rmfiles $ac_file";;
   esac
 done
 rm -f $ac_rmfiles
 
 if { { ac_try="$ac_link_default"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link_default") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
 # So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
 # so that the user can short-circuit this test for compilers unknown to
 # Autoconf.
 for ac_file in $ac_files ''
 do
   test -f "$ac_file" || continue
   case $ac_file in
     *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
 	;;
     [ab].out )
 	# We found the default executable, but exeext='' is most
 	# certainly right.
 	break;;
     *.* )
 	if test ${ac_cv_exeext+y} && test "$ac_cv_exeext" != no;
 	then :; else
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
 	# We set ac_cv_exeext here because the later test for it is not
 	# safe: cross compilers may not add the suffix if given an `-o'
 	# argument, so we may need to know it at that point already.
 	# Even if this section looks crufty: it has the advantage of
 	# actually working.
 	break;;
     * )
 	break;;
   esac
 done
 test "$ac_cv_exeext" = no && ac_cv_exeext=
 
 else $as_nop
   ac_file=''
 fi
 if test -z "$ac_file"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
 See \`config.log' for more details" "$LINENO" 5; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
 printf %s "checking for C compiler default output file name... " >&6; }
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
 printf "%s\n" "$ac_file" >&6; }
 ac_exeext=$ac_cv_exeext
 
 rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
 printf %s "checking for suffix of executables... " >&6; }
 if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   # If both `conftest.exe' and `conftest' are `present' (well, observable)
 # catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
 # work properly (i.e., refer to `conftest.exe'), while it won't with
 # `rm'.
 for ac_file in conftest.exe conftest conftest.*; do
   test -f "$ac_file" || continue
   case $ac_file in
     *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
     *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	  break;;
     * ) break;;
   esac
 done
 else $as_nop
   { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 rm -f conftest conftest$ac_cv_exeext
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
 printf "%s\n" "$ac_cv_exeext" >&6; }
 
 rm -f conftest.$ac_ext
 EXEEXT=$ac_cv_exeext
 ac_exeext=$EXEEXT
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdio.h>
 int
 main (void)
 {
 FILE *f = fopen ("conftest.out", "w");
  return ferror (f) || fclose (f) != 0;
 
   ;
   return 0;
 }
 _ACEOF
 ac_clean_files="$ac_clean_files conftest.out"
 # Check that the compiler produces executables we can run.  If not, either
 # the compiler is broken, or we cross compile.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
 printf %s "checking whether we are cross compiling... " >&6; }
 if test "$cross_compiling" != yes; then
   { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
   if { ac_try='./conftest$ac_cv_exeext'
   { { case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_try") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then
     cross_compiling=no
   else
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
 	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot run C compiled programs.
 If you meant to cross compile, use \`--host'.
 See \`config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
 printf "%s\n" "$cross_compiling" >&6; }
 
 rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
 ac_clean_files=$ac_clean_files_save
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 printf %s "checking for suffix of object files... " >&6; }
 if test ${ac_cv_objext+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 rm -f conftest.o conftest.obj
 if { { ac_try="$ac_compile"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
   for ac_file in conftest.o conftest.obj conftest.*; do
   test -f "$ac_file" || continue;
   case $ac_file in
     *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
     *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
        break;;
   esac
 done
 else $as_nop
   printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 rm -f conftest.$ac_cv_objext conftest.$ac_ext
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
 printf "%s\n" "$ac_cv_objext" >&6; }
 OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
 printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 #ifndef __GNUC__
        choke me
 #endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_compiler_gnu=yes
 else $as_nop
   ac_compiler_gnu=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
 printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 if test $ac_compiler_gnu = yes; then
   GCC=yes
 else
   GCC=
 fi
 ac_test_CFLAGS=${CFLAGS+y}
 ac_save_CFLAGS=$CFLAGS
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
    CFLAGS="-g"
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
 else $as_nop
   CFLAGS=""
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 else $as_nop
   ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
    ac_c_werror_flag=$ac_save_c_werror_flag
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
 printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
 if test $ac_test_CFLAGS; then
   CFLAGS=$ac_save_CFLAGS
 elif test $ac_cv_prog_cc_g = yes; then
   if test "$GCC" = yes; then
     CFLAGS="-g -O2"
   else
     CFLAGS="-g"
   fi
 else
   if test "$GCC" = yes; then
     CFLAGS="-O2"
   else
     CFLAGS=
   fi
 fi
 ac_prog_cc_stdc=no
 if test x$ac_prog_cc_stdc = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
 printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_prog_cc_c11=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_c_conftest_c11_program
 _ACEOF
 for ac_arg in '' -std=gnu11
 do
   CC="$ac_save_CC $ac_arg"
   if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_c11=$ac_arg
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c11" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
 else $as_nop
   if test "x$ac_cv_prog_cc_c11" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
 printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
      CC="$CC $ac_cv_prog_cc_c11"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
   ac_prog_cc_stdc=c11
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
 printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_prog_cc_c99=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_c_conftest_c99_program
 _ACEOF
 for ac_arg in '' -std=gnu99 -std=c99 -c99 -qlanglvl=extc1x -qlanglvl=extc99 -AC99 -D_STDC_C99=
 do
   CC="$ac_save_CC $ac_arg"
   if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_c99=$ac_arg
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
 else $as_nop
   if test "x$ac_cv_prog_cc_c99" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
 printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
      CC="$CC $ac_cv_prog_cc_c99"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
   ac_prog_cc_stdc=c99
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
 printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_c_conftest_c89_program
 _ACEOF
 for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
 do
   CC="$ac_save_CC $ac_arg"
   if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_c89=$ac_arg
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
 fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
 else $as_nop
   if test "x$ac_cv_prog_cc_c89" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
 printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
      CC="$CC $ac_cv_prog_cc_c89"
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
   ac_prog_cc_stdc=c89
 fi
 fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 # XXX relax this after reimplementing logit() etc.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports C99-style variadic macros" >&5
 printf %s "checking if $CC supports C99-style variadic macros... " >&6; }
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int f(int a, int b, int c) { return a + b + c; }
 #define F(a, ...) f(a, __VA_ARGS__)
 
 int
 main (void)
 {
 return F(1, 2, -3);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    as_fn_error $? "*** OpenSSH requires support for C99-style variadic macros" "$LINENO" 5
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 
 
 
   # Make sure we can run config.sub.
 $SHELL "${ac_aux_dir}config.sub" sun4 >/dev/null 2>&1 ||
   as_fn_error $? "cannot run $SHELL ${ac_aux_dir}config.sub" "$LINENO" 5
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
 printf %s "checking build system type... " >&6; }
 if test ${ac_cv_build+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_build_alias=$build_alias
 test "x$ac_build_alias" = x &&
   ac_build_alias=`$SHELL "${ac_aux_dir}config.guess"`
 test "x$ac_build_alias" = x &&
   as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
 ac_cv_build=`$SHELL "${ac_aux_dir}config.sub" $ac_build_alias` ||
   as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $ac_build_alias failed" "$LINENO" 5
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
 printf "%s\n" "$ac_cv_build" >&6; }
 case $ac_cv_build in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical build" "$LINENO" 5;;
 esac
 build=$ac_cv_build
 ac_save_IFS=$IFS; IFS='-'
 set x $ac_cv_build
 shift
 build_cpu=$1
 build_vendor=$2
 shift; shift
 # Remember, the first character of IFS is used to create $*,
 # except with old shells:
 build_os=$*
 IFS=$ac_save_IFS
 case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
 printf %s "checking host system type... " >&6; }
 if test ${ac_cv_host+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test "x$host_alias" = x; then
   ac_cv_host=$ac_cv_build
 else
   ac_cv_host=`$SHELL "${ac_aux_dir}config.sub" $host_alias` ||
     as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $host_alias failed" "$LINENO" 5
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
 printf "%s\n" "$ac_cv_host" >&6; }
 case $ac_cv_host in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical host" "$LINENO" 5;;
 esac
 host=$ac_cv_host
 ac_save_IFS=$IFS; IFS='-'
 set x $ac_cv_host
 shift
 host_cpu=$1
 host_vendor=$2
 shift; shift
 # Remember, the first character of IFS is used to create $*,
 # except with old shells:
 host_os=$*
 IFS=$ac_save_IFS
 case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
 
 
 ac_header= ac_cache=
 for ac_item in $ac_header_c_list
 do
   if test $ac_cache; then
     ac_fn_c_check_header_compile "$LINENO" $ac_header ac_cv_header_$ac_cache "$ac_includes_default"
     if eval test \"x\$ac_cv_header_$ac_cache\" = xyes; then
       printf "%s\n" "#define $ac_item 1" >> confdefs.h
     fi
     ac_header= ac_cache=
   elif test $ac_header; then
     ac_cache=$ac_item
   else
     ac_header=$ac_item
   fi
 done
 
 
 
 
 
 
 
 
 if test $ac_cv_header_stdlib_h = yes && test $ac_cv_header_string_h = yes
 then :
 
 printf "%s\n" "#define STDC_HEADERS 1" >>confdefs.h
 
 fi
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
 printf %s "checking whether byte ordering is bigendian... " >&6; }
 if test ${ac_cv_c_bigendian+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_c_bigendian=unknown
     # See if we're dealing with a universal compiler.
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #ifndef __APPLE_CC__
 	       not a universal capable compiler
 	     #endif
 	     typedef int dummy;
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 	# Check for potential -arch flags.  It is not universal unless
 	# there are at least two -arch flags with different values.
 	ac_arch=
 	ac_prev=
 	for ac_word in $CC $CFLAGS $CPPFLAGS $LDFLAGS; do
 	 if test -n "$ac_prev"; then
 	   case $ac_word in
 	     i?86 | x86_64 | ppc | ppc64)
 	       if test -z "$ac_arch" || test "$ac_arch" = "$ac_word"; then
 		 ac_arch=$ac_word
 	       else
 		 ac_cv_c_bigendian=universal
 		 break
 	       fi
 	       ;;
 	   esac
 	   ac_prev=
 	 elif test "x$ac_word" = "x-arch"; then
 	   ac_prev=arch
 	 fi
        done
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
     if test $ac_cv_c_bigendian = unknown; then
       # See if sys/param.h defines the BYTE_ORDER macro.
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
 	     #include <sys/param.h>
 
 int
 main (void)
 {
 #if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
 		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
 		     && LITTLE_ENDIAN)
 	      bogus endian macros
 	     #endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   # It does; now see whether it defined to BIG_ENDIAN or not.
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
 		#include <sys/param.h>
 
 int
 main (void)
 {
 #if BYTE_ORDER != BIG_ENDIAN
 		 not big endian
 		#endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_bigendian=yes
 else $as_nop
   ac_cv_c_bigendian=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
     fi
     if test $ac_cv_c_bigendian = unknown; then
       # See if <limits.h> defines _LITTLE_ENDIAN or _BIG_ENDIAN (e.g., Solaris).
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <limits.h>
 
 int
 main (void)
 {
 #if ! (defined _LITTLE_ENDIAN || defined _BIG_ENDIAN)
 	      bogus endian macros
 	     #endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   # It does; now see whether it defined to _BIG_ENDIAN or not.
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <limits.h>
 
 int
 main (void)
 {
 #ifndef _BIG_ENDIAN
 		 not big endian
 		#endif
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_bigendian=yes
 else $as_nop
   ac_cv_c_bigendian=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
     fi
     if test $ac_cv_c_bigendian = unknown; then
       # Compile a test program.
       if test "$cross_compiling" = yes
 then :
   # Try to guess by grepping values from an object file.
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 unsigned short int ascii_mm[] =
 		  { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
 		unsigned short int ascii_ii[] =
 		  { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
 		int use_ascii (int i) {
 		  return ascii_mm[i] + ascii_ii[i];
 		}
 		unsigned short int ebcdic_ii[] =
 		  { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
 		unsigned short int ebcdic_mm[] =
 		  { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
 		int use_ebcdic (int i) {
 		  return ebcdic_mm[i] + ebcdic_ii[i];
 		}
 		extern int foo;
 
 int
 main (void)
 {
 return use_ascii (foo) == use_ebcdic (foo);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
 	      ac_cv_c_bigendian=yes
 	    fi
 	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
 	      if test "$ac_cv_c_bigendian" = unknown; then
 		ac_cv_c_bigendian=no
 	      else
 		# finding both strings is unlikely to happen, but who knows?
 		ac_cv_c_bigendian=unknown
 	      fi
 	    fi
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 int
 main (void)
 {
 
 	     /* Are we little or big endian?  From Harbison&Steele.  */
 	     union
 	     {
 	       long int l;
 	       char c[sizeof (long int)];
 	     } u;
 	     u.l = 1;
 	     return u.c[sizeof (long int) - 1] == 1;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   ac_cv_c_bigendian=no
 else $as_nop
   ac_cv_c_bigendian=yes
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
     fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_bigendian" >&5
 printf "%s\n" "$ac_cv_c_bigendian" >&6; }
  case $ac_cv_c_bigendian in #(
    yes)
      printf "%s\n" "#define WORDS_BIGENDIAN 1" >>confdefs.h
 ;; #(
    no)
       ;; #(
    universal)
 
 printf "%s\n" "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
 
      ;; #(
    *)
      as_fn_error $? "unknown endianness
  presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
  esac
 
 
 # Checks for programs.
 for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AWK+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$AWK"; then
   ac_cv_prog_AWK="$AWK" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AWK="$ac_prog"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 AWK=$ac_cv_prog_AWK
 if test -n "$AWK"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
 printf "%s\n" "$AWK" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
   test -n "$AWK" && break
 done
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
 printf %s "checking how to run the C preprocessor... " >&6; }
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
 fi
 if test -z "$CPP"; then
   if test ${ac_cv_prog_CPP+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
       # Double quotes because $CC needs to be expanded
     for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
     do
       ac_preproc_ok=false
 for ac_c_preproc_warn_flag in '' yes
 do
   # Use a header file that comes with gcc, so configuring glibc
   # with a fresh cross-compiler works.
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp. "Syntax error" is here to catch this case.
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <limits.h>
 		     Syntax error
 _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
 else $as_nop
   # Broken: fails on valid input.
 continue
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
 else $as_nop
   # Passes both tests.
 ac_preproc_ok=:
 break
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
   break
 fi
 
     done
     ac_cv_prog_CPP=$CPP
 
 fi
   CPP=$ac_cv_prog_CPP
 else
   ac_cv_prog_CPP=$CPP
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
 printf "%s\n" "$CPP" >&6; }
 ac_preproc_ok=false
 for ac_c_preproc_warn_flag in '' yes
 do
   # Use a header file that comes with gcc, so configuring glibc
   # with a fresh cross-compiler works.
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp. "Syntax error" is here to catch this case.
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <limits.h>
 		     Syntax error
 _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
 else $as_nop
   # Broken: fails on valid input.
 continue
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
 else $as_nop
   # Passes both tests.
 ac_preproc_ok=:
 break
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
 
 else $as_nop
   { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_RANLIB+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$RANLIB"; then
   ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
 printf "%s\n" "$RANLIB" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 fi
 if test -z "$ac_cv_prog_RANLIB"; then
   ac_ct_RANLIB=$RANLIB
   # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_RANLIB+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$ac_ct_RANLIB"; then
   ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_RANLIB="ranlib"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
 printf "%s\n" "$ac_ct_RANLIB" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_RANLIB" = x; then
     RANLIB=":"
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     RANLIB=$ac_ct_RANLIB
   fi
 else
   RANLIB="$ac_cv_prog_RANLIB"
 fi
 
 
   # Find a good install program.  We prefer a C program (faster),
 # so one script is as good as another.  But avoid the broken or
 # incompatible versions:
 # SysV /etc/install, /usr/sbin/install
 # SunOS /usr/etc/install
 # IRIX /sbin/install
 # AIX /bin/install
 # AmigaOS /C/install, which installs bootblocks on floppy discs
 # AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
 # AFS /usr/afsws/bin/install, which mishandles nonexistent args
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # OS/2's system install, which has a completely different semantic
 # ./install, which can be erroneously created by make from ./install.sh.
 # Reject install programs that cannot install multiple files.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
 printf %s "checking for a BSD-compatible install... " >&6; }
 if test -z "$INSTALL"; then
 if test ${ac_cv_path_install+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     # Account for fact that we put trailing slashes in our PATH walk.
 case $as_dir in #((
   ./ | /[cC]/* | \
   /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
   ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
   /usr/ucb/* ) ;;
   *)
     # OSF1 and SCO ODT 3.0 have their own names for install.
     # Don't use installbsd from OSF since it installs stuff as root
     # by default.
     for ac_prog in ginstall scoinst install; do
       for ac_exec_ext in '' $ac_executable_extensions; do
 	if as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext"; then
 	  if test $ac_prog = install &&
 	    grep dspmsg "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
 	    # AIX install.  It has an incompatible calling convention.
 	    :
 	  elif test $ac_prog = install &&
 	    grep pwplus "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
 	    # program-specific install script used by HP pwplus--don't use.
 	    :
 	  else
 	    rm -rf conftest.one conftest.two conftest.dir
 	    echo one > conftest.one
 	    echo two > conftest.two
 	    mkdir conftest.dir
 	    if "$as_dir$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir/" &&
 	      test -s conftest.one && test -s conftest.two &&
 	      test -s conftest.dir/conftest.one &&
 	      test -s conftest.dir/conftest.two
 	    then
 	      ac_cv_path_install="$as_dir$ac_prog$ac_exec_ext -c"
 	      break 3
 	    fi
 	  fi
 	fi
       done
     done
     ;;
 esac
 
   done
 IFS=$as_save_IFS
 
 rm -rf conftest.one conftest.two conftest.dir
 
 fi
   if test ${ac_cv_path_install+y}; then
     INSTALL=$ac_cv_path_install
   else
     # As a last resort, use the slow shell script.  Don't cache a
     # value for INSTALL within a source directory, because that will
     # break other packages using the cache if that directory is
     # removed, or if the value is a relative name.
     INSTALL=$ac_install_sh
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
 printf "%s\n" "$INSTALL" >&6; }
 
 # Use test -z because SunOS4 sh mishandles braces in ${var-val}.
 # It thinks the first close brace ends the variable substitution.
 test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
 
 test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
 
 test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 printf %s "checking for grep that handles long lines and -e... " >&6; }
 if test ${ac_cv_path_GREP+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -z "$GREP"; then
   ac_path_GREP_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_prog in grep ggrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
       as_fn_executable_p "$ac_path_GREP" || continue
 # Check for GNU ac_path_GREP and select it if it is found.
   # Check for GNU $ac_path_GREP
 case `"$ac_path_GREP" --version 2>&1` in
 *GNU*)
   ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
   while :
   do
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
     printf "%s\n" 'GREP' >> "conftest.nl"
     "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_GREP_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_GREP="$ac_path_GREP"
       ac_path_GREP_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
   done
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
       $ac_path_GREP_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_GREP"; then
     as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
   ac_cv_path_GREP=$GREP
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
 printf "%s\n" "$ac_cv_path_GREP" >&6; }
  GREP="$ac_cv_path_GREP"
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 printf %s "checking for egrep... " >&6; }
 if test ${ac_cv_path_EGREP+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
    then ac_cv_path_EGREP="$GREP -E"
    else
      if test -z "$EGREP"; then
   ac_path_EGREP_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_prog in egrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
       as_fn_executable_p "$ac_path_EGREP" || continue
 # Check for GNU ac_path_EGREP and select it if it is found.
   # Check for GNU $ac_path_EGREP
 case `"$ac_path_EGREP" --version 2>&1` in
 *GNU*)
   ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
   while :
   do
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
     printf "%s\n" 'EGREP' >> "conftest.nl"
     "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_EGREP_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_EGREP="$ac_path_EGREP"
       ac_path_EGREP_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
   done
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
       $ac_path_EGREP_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_EGREP"; then
     as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
   ac_cv_path_EGREP=$EGREP
 fi
 
    fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
 printf "%s\n" "$ac_cv_path_EGREP" >&6; }
  EGREP="$ac_cv_path_EGREP"
 
 
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a race-free mkdir -p" >&5
 printf %s "checking for a race-free mkdir -p... " >&6; }
 if test -z "$MKDIR_P"; then
   if test ${ac_cv_path_mkdir+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_prog in mkdir gmkdir; do
 	 for ac_exec_ext in '' $ac_executable_extensions; do
 	   as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext" || continue
 	   case `"$as_dir$ac_prog$ac_exec_ext" --version 2>&1` in #(
 	     'mkdir ('*'coreutils) '* | \
 	     'BusyBox '* | \
 	     'mkdir (fileutils) '4.1*)
 	       ac_cv_path_mkdir=$as_dir$ac_prog$ac_exec_ext
 	       break 3;;
 	   esac
 	 done
        done
   done
 IFS=$as_save_IFS
 
 fi
 
   test -d ./--version && rmdir ./--version
   if test ${ac_cv_path_mkdir+y}; then
     MKDIR_P="$ac_cv_path_mkdir -p"
   else
     # As a last resort, use the slow shell script.  Don't cache a
     # value for MKDIR_P within a source directory, because that will
     # break other packages using the cache if that directory is
     # removed, or if the value is a relative name.
     MKDIR_P="$ac_install_sh -d"
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
 printf "%s\n" "$MKDIR_P" >&6; }
 
 if test -n "$ac_tool_prefix"; then
   for ac_prog in ar
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AR+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$AR"; then
   ac_cv_prog_AR="$AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
 printf "%s\n" "$AR" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
     test -n "$AR" && break
   done
 fi
 if test -z "$AR"; then
   ac_ct_AR=$AR
   for ac_prog in ar
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_AR+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$ac_ct_AR"; then
   ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_AR="$ac_prog"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
 printf "%s\n" "$ac_ct_AR" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
   test -n "$ac_ct_AR" && break
 done
 
   if test "x$ac_ct_AR" = x; then
     AR=""
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     AR=$ac_ct_AR
   fi
 fi
 
 # Extract the first word of "cat", so it can be a program name with args.
 set dummy cat; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_CAT+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $CAT in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_CAT="$CAT" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_CAT="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 CAT=$ac_cv_path_CAT
 if test -n "$CAT"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
 printf "%s\n" "$CAT" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "kill", so it can be a program name with args.
 set dummy kill; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_KILL+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $KILL in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_KILL="$KILL" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_KILL="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 KILL=$ac_cv_path_KILL
 if test -n "$KILL"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $KILL" >&5
 printf "%s\n" "$KILL" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "sed", so it can be a program name with args.
 set dummy sed; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_SED+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $SED in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SED="$SED" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_SED="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 SED=$ac_cv_path_SED
 if test -n "$SED"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SED" >&5
 printf "%s\n" "$SED" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "bash", so it can be a program name with args.
 set dummy bash; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_TEST_MINUS_S_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $TEST_MINUS_S_SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_TEST_MINUS_S_SH="$TEST_MINUS_S_SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_TEST_MINUS_S_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 TEST_MINUS_S_SH=$ac_cv_path_TEST_MINUS_S_SH
 if test -n "$TEST_MINUS_S_SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $TEST_MINUS_S_SH" >&5
 printf "%s\n" "$TEST_MINUS_S_SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "ksh", so it can be a program name with args.
 set dummy ksh; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_TEST_MINUS_S_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $TEST_MINUS_S_SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_TEST_MINUS_S_SH="$TEST_MINUS_S_SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_TEST_MINUS_S_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 TEST_MINUS_S_SH=$ac_cv_path_TEST_MINUS_S_SH
 if test -n "$TEST_MINUS_S_SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $TEST_MINUS_S_SH" >&5
 printf "%s\n" "$TEST_MINUS_S_SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "sh", so it can be a program name with args.
 set dummy sh; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_TEST_MINUS_S_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $TEST_MINUS_S_SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_TEST_MINUS_S_SH="$TEST_MINUS_S_SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_TEST_MINUS_S_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 TEST_MINUS_S_SH=$ac_cv_path_TEST_MINUS_S_SH
 if test -n "$TEST_MINUS_S_SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $TEST_MINUS_S_SH" >&5
 printf "%s\n" "$TEST_MINUS_S_SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "bash", so it can be a program name with args.
 set dummy bash; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SH="$SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 SH=$ac_cv_path_SH
 if test -n "$SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
 printf "%s\n" "$SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "ksh", so it can be a program name with args.
 set dummy ksh; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SH="$SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 SH=$ac_cv_path_SH
 if test -n "$SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
 printf "%s\n" "$SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "sh", so it can be a program name with args.
 set dummy sh; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_SH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $SH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SH="$SH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_SH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 SH=$ac_cv_path_SH
 if test -n "$SH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
 printf "%s\n" "$SH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "groff", so it can be a program name with args.
 set dummy groff; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_GROFF+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $GROFF in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_GROFF="$GROFF" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_GROFF="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 GROFF=$ac_cv_path_GROFF
 if test -n "$GROFF"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $GROFF" >&5
 printf "%s\n" "$GROFF" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "nroff awf", so it can be a program name with args.
 set dummy nroff awf; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_NROFF+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $NROFF in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_NROFF="$NROFF" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_NROFF="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 NROFF=$ac_cv_path_NROFF
 if test -n "$NROFF"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $NROFF" >&5
 printf "%s\n" "$NROFF" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "mandoc", so it can be a program name with args.
 set dummy mandoc; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_MANDOC+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $MANDOC in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_MANDOC="$MANDOC" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_MANDOC="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 MANDOC=$ac_cv_path_MANDOC
 if test -n "$MANDOC"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MANDOC" >&5
 printf "%s\n" "$MANDOC" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
 set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PKGCONFIG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PKGCONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PKGCONFIG="$PKGCONFIG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PKGCONFIG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 PKGCONFIG=$ac_cv_path_PKGCONFIG
 if test -n "$PKGCONFIG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PKGCONFIG" >&5
 printf "%s\n" "$PKGCONFIG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 fi
 if test -z "$ac_cv_path_PKGCONFIG"; then
   ac_pt_PKGCONFIG=$PKGCONFIG
   # Extract the first word of "pkg-config", so it can be a program name with args.
 set dummy pkg-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_ac_pt_PKGCONFIG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $ac_pt_PKGCONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ac_pt_PKGCONFIG="$ac_pt_PKGCONFIG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_ac_pt_PKGCONFIG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 ac_pt_PKGCONFIG=$ac_cv_path_ac_pt_PKGCONFIG
 if test -n "$ac_pt_PKGCONFIG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKGCONFIG" >&5
 printf "%s\n" "$ac_pt_PKGCONFIG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_pt_PKGCONFIG" = x; then
     PKGCONFIG="no"
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     PKGCONFIG=$ac_pt_PKGCONFIG
   fi
 else
   PKGCONFIG="$ac_cv_path_PKGCONFIG"
 fi
 
 TEST_SHELL=sh
 
 
 if test "x$MANDOC" != "x" ; then
 	MANFMT="$MANDOC"
 elif test "x$NROFF" != "x" ; then
 	MANFMT="$NROFF -mandoc"
 elif test "x$GROFF" != "x" ; then
 	MANFMT="$GROFF -mandoc -Tascii"
 else
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: no manpage formatter found" >&5
 printf "%s\n" "$as_me: WARNING: no manpage formatter found" >&2;}
 	MANFMT="false"
 fi
 
 
 # Extract the first word of "groupadd", so it can be a program name with args.
 set dummy groupadd; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_GROUPADD_PROG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PATH_GROUPADD_PROG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_GROUPADD_PROG="$PATH_GROUPADD_PROG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in /usr/sbin${PATH_SEPARATOR}/etc
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PATH_GROUPADD_PROG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PATH_GROUPADD_PROG" && ac_cv_path_PATH_GROUPADD_PROG="groupadd"
   ;;
 esac
 fi
 PATH_GROUPADD_PROG=$ac_cv_path_PATH_GROUPADD_PROG
 if test -n "$PATH_GROUPADD_PROG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PATH_GROUPADD_PROG" >&5
 printf "%s\n" "$PATH_GROUPADD_PROG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "useradd", so it can be a program name with args.
 set dummy useradd; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_USERADD_PROG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PATH_USERADD_PROG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_USERADD_PROG="$PATH_USERADD_PROG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in /usr/sbin${PATH_SEPARATOR}/etc
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PATH_USERADD_PROG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   test -z "$ac_cv_path_PATH_USERADD_PROG" && ac_cv_path_PATH_USERADD_PROG="useradd"
   ;;
 esac
 fi
 PATH_USERADD_PROG=$ac_cv_path_PATH_USERADD_PROG
 if test -n "$PATH_USERADD_PROG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PATH_USERADD_PROG" >&5
 printf "%s\n" "$PATH_USERADD_PROG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "pkgmk", so it can be a program name with args.
 set dummy pkgmk; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_MAKE_PACKAGE_SUPPORTED+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test -n "$MAKE_PACKAGE_SUPPORTED"; then
   ac_cv_prog_MAKE_PACKAGE_SUPPORTED="$MAKE_PACKAGE_SUPPORTED" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_MAKE_PACKAGE_SUPPORTED="yes"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   test -z "$ac_cv_prog_MAKE_PACKAGE_SUPPORTED" && ac_cv_prog_MAKE_PACKAGE_SUPPORTED="no"
 fi
 fi
 MAKE_PACKAGE_SUPPORTED=$ac_cv_prog_MAKE_PACKAGE_SUPPORTED
 if test -n "$MAKE_PACKAGE_SUPPORTED"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MAKE_PACKAGE_SUPPORTED" >&5
 printf "%s\n" "$MAKE_PACKAGE_SUPPORTED" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 if test -x /sbin/sh; then
 	STARTUP_SCRIPT_SHELL=/sbin/sh
 
 else
 	STARTUP_SCRIPT_SHELL=/bin/sh
 
 fi
 
 # System features
 # Check whether --enable-largefile was given.
 if test ${enable_largefile+y}
 then :
   enableval=$enable_largefile;
 fi
 
 if test "$enable_largefile" != no; then
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
 printf %s "checking for special C compiler options needed for large files... " >&6; }
 if test ${ac_cv_sys_largefile_CC+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_sys_largefile_CC=no
      if test "$GCC" != yes; then
        ac_save_CC=$CC
        while :; do
 	 # IRIX 6.2 and later do not support large files by default,
 	 # so use the C compiler's -n32 option if that helps.
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
 #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 	 if ac_fn_c_try_compile "$LINENO"
 then :
   break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam
 	 CC="$CC -n32"
 	 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_sys_largefile_CC=' -n32'; break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam
 	 break
        done
        CC=$ac_save_CC
        rm -f conftest.$ac_ext
     fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
 printf "%s\n" "$ac_cv_sys_largefile_CC" >&6; }
   if test "$ac_cv_sys_largefile_CC" != no; then
     CC=$CC$ac_cv_sys_largefile_CC
   fi
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
 printf %s "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
 if test ${ac_cv_sys_file_offset_bits+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   while :; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
 #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_sys_file_offset_bits=no; break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _FILE_OFFSET_BITS 64
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
 #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_sys_file_offset_bits=64; break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   ac_cv_sys_file_offset_bits=unknown
   break
 done
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
 printf "%s\n" "$ac_cv_sys_file_offset_bits" >&6; }
 case $ac_cv_sys_file_offset_bits in #(
   no | unknown) ;;
   *)
 printf "%s\n" "#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits" >>confdefs.h
 ;;
 esac
 rm -rf conftest*
   if test $ac_cv_sys_file_offset_bits = unknown; then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
 printf %s "checking for _LARGE_FILES value needed for large files... " >&6; }
 if test ${ac_cv_sys_large_files+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   while :; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
 #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_sys_large_files=no; break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _LARGE_FILES 1
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
 #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_sys_large_files=1; break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   ac_cv_sys_large_files=unknown
   break
 done
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
 printf "%s\n" "$ac_cv_sys_large_files" >&6; }
 case $ac_cv_sys_large_files in #(
   no | unknown) ;;
   *)
 printf "%s\n" "#define _LARGE_FILES $ac_cv_sys_large_files" >>confdefs.h
 ;;
 esac
 rm -rf conftest*
   fi
 fi
 
 
 if test -z "$AR" ; then
 	as_fn_error $? "*** 'ar' missing, please install or fix your \$PATH ***" "$LINENO" 5
 fi
 
 # Extract the first word of "passwd", so it can be a program name with args.
 set dummy passwd; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PATH_PASSWD_PROG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PATH_PASSWD_PROG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PATH_PASSWD_PROG="$PATH_PASSWD_PROG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PATH_PASSWD_PROG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 PATH_PASSWD_PROG=$ac_cv_path_PATH_PASSWD_PROG
 if test -n "$PATH_PASSWD_PROG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PATH_PASSWD_PROG" >&5
 printf "%s\n" "$PATH_PASSWD_PROG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 if test ! -z "$PATH_PASSWD_PROG" ; then
 
 printf "%s\n" "#define _PATH_PASSWD_PROG \"$PATH_PASSWD_PROG\"" >>confdefs.h
 
 fi
 
 LD="$CC"
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
 printf %s "checking for inline... " >&6; }
 if test ${ac_cv_c_inline+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #ifndef __cplusplus
 typedef int foo_t;
 static $ac_kw foo_t static_foo (void) {return 0; }
 $ac_kw foo_t foo (void) {return 0; }
 #endif
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_inline=$ac_kw
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   test "$ac_cv_c_inline" != no && break
 done
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
 printf "%s\n" "$ac_cv_c_inline" >&6; }
 
 case $ac_cv_c_inline in
   inline | yes) ;;
   *)
     case $ac_cv_c_inline in
       no) ac_val=;;
       *) ac_val=$ac_cv_c_inline;;
     esac
     cat >>confdefs.h <<_ACEOF
 #ifndef __cplusplus
 #define inline $ac_val
 #endif
 _ACEOF
     ;;
 esac
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
 printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
 if test ${ac_cv_c_undeclared_builtin_options+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_save_CFLAGS=$CFLAGS
    ac_cv_c_undeclared_builtin_options='cannot detect'
    for ac_arg in '' -fno-builtin; do
      CFLAGS="$ac_save_CFLAGS $ac_arg"
      # This test program should *not* compile successfully.
      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 (void) strchr;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 else $as_nop
   # This test program should compile successfully.
         # No library function is consistently available on
         # freestanding implementations, so test against a dummy
         # declaration.  Include always-available headers on the
         # off chance that they somehow elicit warnings.
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <float.h>
 #include <limits.h>
 #include <stdarg.h>
 #include <stddef.h>
 extern void ac_decl (int, char *);
 
 int
 main (void)
 {
 (void) ac_decl (0, (char *) 0);
   (void) ac_decl;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   if test x"$ac_arg" = x
 then :
   ac_cv_c_undeclared_builtin_options='none needed'
 else $as_nop
   ac_cv_c_undeclared_builtin_options=$ac_arg
 fi
           break
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
     done
     CFLAGS=$ac_save_CFLAGS
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5
 printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; }
   case $ac_cv_c_undeclared_builtin_options in #(
   'cannot detect') :
     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot make $CC report undeclared builtins
 See \`config.log' for more details" "$LINENO" 5; } ;; #(
   'none needed') :
     ac_c_undeclared_builtin_options='' ;; #(
   *) :
     ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;;
 esac
 
 ac_fn_check_decl "$LINENO" "LLONG_MAX" "ac_cv_have_decl_LLONG_MAX" "#include <limits.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_LLONG_MAX" = xyes
 then :
   have_llong_max=1
 fi
 ac_fn_check_decl "$LINENO" "LONG_LONG_MAX" "ac_cv_have_decl_LONG_LONG_MAX" "#include <limits.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_LONG_LONG_MAX" = xyes
 then :
   have_long_long_max=1
 fi
 ac_fn_check_decl "$LINENO" "SYSTR_POLICY_KILL" "ac_cv_have_decl_SYSTR_POLICY_KILL" "
 	#include <sys/types.h>
 	#include <sys/param.h>
 	#include <dev/systrace.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_SYSTR_POLICY_KILL" = xyes
 then :
   have_systr_policy_kill=1
 fi
 ac_fn_check_decl "$LINENO" "RLIMIT_NPROC" "ac_cv_have_decl_RLIMIT_NPROC" "
 	#include <sys/types.h>
 	#include <sys/resource.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_RLIMIT_NPROC" = xyes
 then :
 
 printf "%s\n" "#define HAVE_RLIMIT_NPROC /**/" >>confdefs.h
 
 fi
 ac_fn_check_decl "$LINENO" "PR_SET_NO_NEW_PRIVS" "ac_cv_have_decl_PR_SET_NO_NEW_PRIVS" "
 	#include <sys/types.h>
 	#include <linux/prctl.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_PR_SET_NO_NEW_PRIVS" = xyes
 then :
   have_linux_no_new_privs=1
 fi
 
 openssl=yes
 openssl_bin=openssl
 
 # Check whether --with-openssl was given.
 if test ${with_openssl+y}
 then :
   withval=$with_openssl;   if test "x$withval" = "xno" ; then
 		openssl=no
 		openssl_bin=""
 	   fi
 
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL will be used for cryptography" >&5
 printf %s "checking whether OpenSSL will be used for cryptography... " >&6; }
 if test "x$openssl" = "xyes" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define WITH_OPENSSL 1" >>confdefs.h
 
 else
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 use_stack_protector=1
 use_toolchain_hardening=1
+use_retpoline=1
 
 # Check whether --with-stackprotect was given.
 if test ${with_stackprotect+y}
 then :
   withval=$with_stackprotect;
     if test "x$withval" = "xno"; then
 	use_stack_protector=0
     fi
 fi
 
 
 # Check whether --with-hardening was given.
 if test ${with_hardening+y}
 then :
   withval=$with_hardening;
     if test "x$withval" = "xno"; then
 	use_toolchain_hardening=0
     fi
 fi
 
 
+# Check whether --with-retpoline was given.
+if test ${with_retpoline+y}
+then :
+  withval=$with_retpoline;
+    if test "x$withval" = "xno"; then
+	use_retpoline=0
+    fi
+fi
+
+
 # We use -Werror for the tests only so that we catch warnings like "this is
 # on by default" for things like -fPIE.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports -Werror" >&5
 printf %s "checking if $CC supports -Werror... " >&6; }
 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Werror"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 int main(void) { return 0; }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 	  WERROR="-Werror"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	  WERROR=""
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 CFLAGS="$saved_CFLAGS"
 
 if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking gcc version" >&5
 printf %s "checking gcc version... " >&6; }
 	GCC_VER=`$CC -v 2>&1 | $AWK '/gcc version /{print $3}'`
 	case "$GCC_VER" in
 		1.*) no_attrib_nonnull=1 ;;
 		2.8* | 2.9*)
 		     no_attrib_nonnull=1
 		     ;;
 		2.*) no_attrib_nonnull=1 ;;
 		*) ;;
 	esac
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $GCC_VER" >&5
 printf "%s\n" "$GCC_VER" >&6; }
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking clang version" >&5
 printf %s "checking clang version... " >&6; }
 	ver="`$CC -v 2>&1`"
 	if echo "$ver" | grep "Apple" >/dev/null; then
 		CLANG_VER=apple-`echo "$ver" | grep 'clang version' | \
 		    $SED 's/.*clang version //g' | $AWK '{print $1}'`
 	else
 		CLANG_VER=`echo "$ver" | grep 'clang version' | \
 		    $SED 's/.*clang version //g' | $AWK '{print $1}'`
 	fi
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CLANG_VER" >&5
 printf "%s\n" "$CLANG_VER" >&6; }
 
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -pipe" >&5
 printf %s "checking if $CC supports compile flag -pipe... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -pipe"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-pipe"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wunknown-warning-option" >&5
 printf %s "checking if $CC supports compile flag -Wunknown-warning-option... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wunknown-warning-option"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wunknown-warning-option"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wno-error=format-truncation" >&5
 printf %s "checking if $CC supports compile flag -Wno-error=format-truncation... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wno-error=format-truncation"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wno-error=format-truncation"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Qunused-arguments" >&5
 printf %s "checking if $CC supports compile flag -Qunused-arguments... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Qunused-arguments"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Qunused-arguments"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wall" >&5
 printf %s "checking if $CC supports compile flag -Wall... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wall"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wall"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wextra" >&5
 printf %s "checking if $CC supports compile flag -Wextra... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wextra"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wextra"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wpointer-arith" >&5
 printf %s "checking if $CC supports compile flag -Wpointer-arith... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wpointer-arith"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wpointer-arith"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wuninitialized" >&5
 printf %s "checking if $CC supports compile flag -Wuninitialized... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wuninitialized"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wuninitialized"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wsign-compare" >&5
 printf %s "checking if $CC supports compile flag -Wsign-compare... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wsign-compare"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wsign-compare"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wformat-security" >&5
 printf %s "checking if $CC supports compile flag -Wformat-security... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wformat-security"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wformat-security"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wsizeof-pointer-memaccess" >&5
 printf %s "checking if $CC supports compile flag -Wsizeof-pointer-memaccess... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wsizeof-pointer-memaccess"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wsizeof-pointer-memaccess"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wpointer-sign" >&5
 printf %s "checking if $CC supports compile flag -Wpointer-sign... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wpointer-sign"
 	_define_flag="-Wno-pointer-sign"
 	test "x$_define_flag" = "x" && _define_flag="-Wpointer-sign"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wunused-parameter" >&5
 printf %s "checking if $CC supports compile flag -Wunused-parameter... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wunused-parameter"
 	_define_flag="-Wno-unused-parameter"
 	test "x$_define_flag" = "x" && _define_flag="-Wunused-parameter"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wunused-result" >&5
 printf %s "checking if $CC supports compile flag -Wunused-result... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wunused-result"
 	_define_flag="-Wno-unused-result"
 	test "x$_define_flag" = "x" && _define_flag="-Wunused-result"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wimplicit-fallthrough" >&5
 printf %s "checking if $CC supports compile flag -Wimplicit-fallthrough... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wimplicit-fallthrough"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wimplicit-fallthrough"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wmisleading-indentation" >&5
 printf %s "checking if $CC supports compile flag -Wmisleading-indentation... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wmisleading-indentation"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wmisleading-indentation"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wbitwise-instead-of-logical" >&5
 printf %s "checking if $CC supports compile flag -Wbitwise-instead-of-logical... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wbitwise-instead-of-logical"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wbitwise-instead-of-logical"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fno-strict-aliasing" >&5
 printf %s "checking if $CC supports compile flag -fno-strict-aliasing... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -fno-strict-aliasing"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-fno-strict-aliasing"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
     if test "x$use_toolchain_hardening" = "x1"; then
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -mretpoline" >&5
-printf %s "checking if $CC supports compile flag -mretpoline... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -D_FORTIFY_SOURCE=2" >&5
+printf %s "checking if $CC supports compile flag -D_FORTIFY_SOURCE=2... " >&6; }
 	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -mretpoline"
+	CFLAGS="$CFLAGS $WERROR -D_FORTIFY_SOURCE=2"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-mretpoline"
+	test "x$_define_flag" = "x" && _define_flag="-D_FORTIFY_SOURCE=2"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-} # clang
+}
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,retpolineplt" >&5
-printf %s "checking if $LD supports link flag -Wl,-z,retpolineplt... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,relro" >&5
+printf %s "checking if $LD supports link flag -Wl,-z,relro... " >&6; }
 	saved_LDFLAGS="$LDFLAGS"
-	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,retpolineplt"
+	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,relro"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,retpolineplt"
+	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,relro"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 else
 		  		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  LDFLAGS="$saved_LDFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 }
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -D_FORTIFY_SOURCE=2" >&5
-printf %s "checking if $CC supports compile flag -D_FORTIFY_SOURCE=2... " >&6; }
-	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -D_FORTIFY_SOURCE=2"
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,now" >&5
+printf %s "checking if $LD supports link flag -Wl,-z,now... " >&6; }
+	saved_LDFLAGS="$LDFLAGS"
+	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,now"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-D_FORTIFY_SOURCE=2"
+	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,now"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
-		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		CFLAGS="$saved_CFLAGS"
+		  LDFLAGS="$saved_LDFLAGS"
 else
-				if test "$cross_compiling" = yes
+		  		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  CFLAGS="$saved_CFLAGS $_define_flag"
+			  LDFLAGS="$saved_LDFLAGS $_define_flag"
+
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  CFLAGS="$saved_CFLAGS $_define_flag"
+			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
-			  CFLAGS="$saved_CFLAGS"
+			  LDFLAGS="$saved_LDFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  CFLAGS="$saved_CFLAGS"
+		  LDFLAGS="$saved_LDFLAGS"
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 }
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,relro" >&5
-printf %s "checking if $LD supports link flag -Wl,-z,relro... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,noexecstack" >&5
+printf %s "checking if $LD supports link flag -Wl,-z,noexecstack... " >&6; }
 	saved_LDFLAGS="$LDFLAGS"
-	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,relro"
+	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,noexecstack"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,relro"
+	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,noexecstack"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 else
 		  		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  LDFLAGS="$saved_LDFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 }
+	# NB. -ftrapv expects certain support functions to be present in
+	# the compiler library (libgcc or similar) to detect integer operations
+	# that can overflow. We must check that the result of enabling it
+	# actually links. The test program compiled/linked includes a number
+	# of integer operations that should exercise this.
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,now" >&5
-printf %s "checking if $LD supports link flag -Wl,-z,now... " >&6; }
-	saved_LDFLAGS="$LDFLAGS"
-	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,now"
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -ftrapv and linking succeeds" >&5
+printf %s "checking if $CC supports compile flag -ftrapv and linking succeeds... " >&6; }
+	saved_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS $WERROR -ftrapv"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,now"
+	test "x$_define_flag" = "x" && _define_flag="-ftrapv"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
-		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  LDFLAGS="$saved_LDFLAGS"
+		CFLAGS="$saved_CFLAGS"
 else
-		  		  if test "$cross_compiling" = yes
+				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  LDFLAGS="$saved_LDFLAGS $_define_flag"
-
+			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  LDFLAGS="$saved_LDFLAGS $_define_flag"
+			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
-			  LDFLAGS="$saved_LDFLAGS"
+			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  LDFLAGS="$saved_LDFLAGS"
+		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 }
-	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,noexecstack" >&5
-printf %s "checking if $LD supports link flag -Wl,-z,noexecstack... " >&6; }
-	saved_LDFLAGS="$LDFLAGS"
-	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,noexecstack"
+	# clang 15 seems to have a bug in -fzero-call-used-regs=all.  See
+	# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
+	# https://github.com/llvm/llvm-project/issues/59242
+	# clang 17 has a different bug that causes an ICE when using this
+	# flag at all (https://bugzilla.mindrot.org/show_bug.cgi?id=3629)
+	case "$CLANG_VER" in
+	apple-15*) {
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds" >&5
+printf %s "checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds... " >&6; }
+	saved_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS $WERROR -fzero-call-used-regs=used"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,noexecstack"
+	test "x$_define_flag" = "x" && _define_flag="-fzero-call-used-regs=used"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
-		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  LDFLAGS="$saved_LDFLAGS"
+		CFLAGS="$saved_CFLAGS"
 else
-		  		  if test "$cross_compiling" = yes
+				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  LDFLAGS="$saved_LDFLAGS $_define_flag"
-
+			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  LDFLAGS="$saved_LDFLAGS $_define_flag"
+			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
-			  LDFLAGS="$saved_LDFLAGS"
+			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  LDFLAGS="$saved_LDFLAGS"
+		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-}
-	# NB. -ftrapv expects certain support functions to be present in
-	# the compiler library (libgcc or similar) to detect integer operations
-	# that can overflow. We must check that the result of enabling it
-	# actually links. The test program compiled/linked includes a number
-	# of integer operations that should exercise this.
-	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -ftrapv and linking succeeds" >&5
-printf %s "checking if $CC supports compile flag -ftrapv and linking succeeds... " >&6; }
+} ;;
+	17*)	;;
+	*)	{
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds" >&5
+printf %s "checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds... " >&6; }
 	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -ftrapv"
+	CFLAGS="$CFLAGS $WERROR -fzero-call-used-regs=used"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-ftrapv"
+	test "x$_define_flag" = "x" && _define_flag="-fzero-call-used-regs=used"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-}
-	# clang 15 seems to have a bug in -fzero-call-used-regs=all.  See
-	# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
-	# https://github.com/llvm/llvm-project/issues/59242
-	# clang 17 has a different bug that causes an ICE when using this
-	# flag at all (https://bugzilla.mindrot.org/show_bug.cgi?id=3629)
-	case "$CLANG_VER" in
-	apple-15*) {
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds" >&5
-printf %s "checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds... " >&6; }
+} ;;
+	esac
+	{
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -ftrivial-auto-var-init=zero" >&5
+printf %s "checking if $CC supports compile flag -ftrivial-auto-var-init=zero... " >&6; }
 	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -fzero-call-used-regs=used"
+	CFLAGS="$CFLAGS $WERROR -ftrivial-auto-var-init=zero"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-fzero-call-used-regs=used"
+	test "x$_define_flag" = "x" && _define_flag="-ftrivial-auto-var-init=zero"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"
+if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-} ;;
-	17*)	;;
-	*)	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds" >&5
-printf %s "checking if $CC supports compile flag -fzero-call-used-regs=used and linking succeeds... " >&6; }
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+}
+    fi
+    if test "x$use_retpoline" = "x1"; then
+	{
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -mretpoline" >&5
+printf %s "checking if $CC supports compile flag -mretpoline... " >&6; }
 	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -fzero-call-used-regs=used"
+	CFLAGS="$CFLAGS $WERROR -mretpoline"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-fzero-call-used-regs=used"
+	test "x$_define_flag" = "x" && _define_flag="-mretpoline"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"
+if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-} ;;
-	esac
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+} # clang
 	{
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -ftrivial-auto-var-init=zero" >&5
-printf %s "checking if $CC supports compile flag -ftrivial-auto-var-init=zero... " >&6; }
-	saved_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $WERROR -ftrivial-auto-var-init=zero"
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -Wl,-z,retpolineplt" >&5
+printf %s "checking if $LD supports link flag -Wl,-z,retpolineplt... " >&6; }
+	saved_LDFLAGS="$LDFLAGS"
+	LDFLAGS="$LDFLAGS $WERROR -Wl,-z,retpolineplt"
 	_define_flag=""
-	test "x$_define_flag" = "x" && _define_flag="-ftrivial-auto-var-init=zero"
+	test "x$_define_flag" = "x" && _define_flag="-Wl,-z,retpolineplt"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
-		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		CFLAGS="$saved_CFLAGS"
+		  LDFLAGS="$saved_LDFLAGS"
 else
-				if test "$cross_compiling" = yes
+		  		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  CFLAGS="$saved_CFLAGS $_define_flag"
+			  LDFLAGS="$saved_LDFLAGS $_define_flag"
+
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-			  CFLAGS="$saved_CFLAGS $_define_flag"
+			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
-			  CFLAGS="$saved_CFLAGS"
+			  LDFLAGS="$saved_LDFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-		  CFLAGS="$saved_CFLAGS"
+		  LDFLAGS="$saved_LDFLAGS"
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 }
     fi
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC accepts -fno-builtin-memset" >&5
 printf %s "checking if $CC accepts -fno-builtin-memset... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fno-builtin-memset"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <string.h>
 int
 main (void)
 {
  char b[10]; memset(b, 0, sizeof(b));
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	# -fstack-protector-all doesn't always work for some GCC versions
 	# and/or platforms, so we test if we can.  If it's not supported
 	# on a given platform gcc will emit a warning so we use -Werror.
 	if test "x$use_stack_protector" = "x1"; then
 	    for t in -fstack-protector-strong -fstack-protector-all \
 		    -fstack-protector; do
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports $t" >&5
 printf %s "checking if $CC supports $t... " >&6; }
 		saved_CFLAGS="$CFLAGS"
 		saved_LDFLAGS="$LDFLAGS"
 		CFLAGS="$CFLAGS $t -Werror"
 		LDFLAGS="$LDFLAGS $t -Werror"
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdio.h>
 	int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
 
 int
 main (void)
 {
 
 	char x[256];
 	snprintf(x, sizeof(x), "XXX%d", func(1));
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 		      CFLAGS="$saved_CFLAGS $t"
 		      LDFLAGS="$saved_LDFLAGS $t"
 		      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $t works" >&5
 printf %s "checking if $t works... " >&6; }
 		      if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: cannot test" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: cannot test" >&2;}
 			  break
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdio.h>
 	int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
 
 int
 main (void)
 {
 
 	char x[256];
 	snprintf(x, sizeof(x), "XXX%d", func(1));
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  break
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 		CFLAGS="$saved_CFLAGS"
 		LDFLAGS="$saved_LDFLAGS"
 	    done
 	fi
 
 	if test -z "$have_llong_max"; then
 		# retry LLONG_MAX with -std=gnu99, needed on some Linuxes
 		unset ac_cv_have_decl_LLONG_MAX
 		saved_CFLAGS="$CFLAGS"
 		CFLAGS="$CFLAGS -std=gnu99"
 		ac_fn_check_decl "$LINENO" "LLONG_MAX" "ac_cv_have_decl_LLONG_MAX" "#include <limits.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_LLONG_MAX" = xyes
 then :
   have_llong_max=1
 else $as_nop
   CFLAGS="$saved_CFLAGS"
 fi
 	fi
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if compiler allows __attribute__ on return types" >&5
 printf %s "checking if compiler allows __attribute__ on return types... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 __attribute__((__unused__)) static void foo(void){return;}
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define NO_ATTRIBUTE_ON_RETURN_TYPE 1" >>confdefs.h
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if compiler allows __attribute__ prototype args" >&5
 printf %s "checking if compiler allows __attribute__ prototype args... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 typedef void foo(const char *, ...) __attribute__((format(printf, 1, 2)));
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define NO_ATTRIBUTE_ON_PROTOTYPE_ARGS 1" >>confdefs.h
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if compiler supports variable length arrays" >&5
 printf %s "checking if compiler supports variable length arrays... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 int
 main (void)
 {
  int i; for (i=0; i<3; i++){int a[i]; a[i-1]=0;} exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define VARIABLE_LENGTH_ARRAYS 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if compiler accepts variable declarations after code" >&5
 printf %s "checking if compiler accepts variable declarations after code... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 int
 main (void)
 {
  int a; a = 1; int b = 1; exit(a-b);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define VARIABLE_DECLARATION_AFTER_CODE 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 if test "x$no_attrib_nonnull" != "x1" ; then
 
 printf "%s\n" "#define HAVE_ATTRIBUTE__NONNULL__ 1" >>confdefs.h
 
 fi
 
 
 # Check whether --with-rpath was given.
 if test ${with_rpath+y}
 then :
   withval=$with_rpath;
 		if test "x$withval" = "xno" ; then
 			rpath_opt=""
 		elif test "x$withval" = "xyes" ; then
 			rpath_opt="-R"
 		else
 			rpath_opt="$withval"
 		fi
 
 
 fi
 
 
 # Allow user to specify flags
 
 # Check whether --with-cflags was given.
 if test ${with_cflags+y}
 then :
   withval=$with_cflags;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CFLAGS="$CFLAGS $withval"
 		fi
 
 
 fi
 
 
 
 # Check whether --with-cflags-after was given.
 if test ${with_cflags_after+y}
 then :
   withval=$with_cflags_after;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CFLAGS_AFTER="$withval"
 		fi
 
 
 fi
 
 
 # Check whether --with-cppflags was given.
 if test ${with_cppflags+y}
 then :
   withval=$with_cppflags;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CPPFLAGS="$CPPFLAGS $withval"
 		fi
 
 
 fi
 
 
 # Check whether --with-ldflags was given.
 if test ${with_ldflags+y}
 then :
   withval=$with_ldflags;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LDFLAGS="$LDFLAGS $withval"
 		fi
 
 
 fi
 
 
 # Check whether --with-ldflags-after was given.
 if test ${with_ldflags_after+y}
 then :
   withval=$with_ldflags_after;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LDFLAGS_AFTER="$withval"
 		fi
 
 
 fi
 
 
 # Check whether --with-libs was given.
 if test ${with_libs+y}
 then :
   withval=$with_libs;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LIBS="$LIBS $withval"
 		fi
 
 
 fi
 
 
 # Check whether --with-Werror was given.
 if test ${with_Werror+y}
 then :
   withval=$with_Werror;
 		if test -n "$withval"  &&  test "x$withval" != "xno"; then
 			werror_flags="-Werror"
 			if test "x${withval}" != "xyes"; then
 				werror_flags="$withval"
 			fi
 		fi
 
 
 fi
 
 
 if test "x$ac_cv_header_sys_stat_h" != "xyes"; then
 	unset ac_cv_header_sys_stat_h
 	ac_fn_c_check_header_compile "$LINENO" "sys/stat.h" "ac_cv_header_sys_stat_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_stat_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_STAT_H 1" >>confdefs.h
 
 fi
 
 fi
 
 ac_fn_c_check_header_compile "$LINENO" "blf.h" "ac_cv_header_blf_h" "$ac_includes_default"
 if test "x$ac_cv_header_blf_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BLF_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "bstring.h" "ac_cv_header_bstring_h" "$ac_includes_default"
 if test "x$ac_cv_header_bstring_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BSTRING_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "crypt.h" "ac_cv_header_crypt_h" "$ac_includes_default"
 if test "x$ac_cv_header_crypt_h" = xyes
 then :
   printf "%s\n" "#define HAVE_CRYPT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "crypto/sha2.h" "ac_cv_header_crypto_sha2_h" "$ac_includes_default"
 if test "x$ac_cv_header_crypto_sha2_h" = xyes
 then :
   printf "%s\n" "#define HAVE_CRYPTO_SHA2_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "dirent.h" "ac_cv_header_dirent_h" "$ac_includes_default"
 if test "x$ac_cv_header_dirent_h" = xyes
 then :
   printf "%s\n" "#define HAVE_DIRENT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "endian.h" "ac_cv_header_endian_h" "$ac_includes_default"
 if test "x$ac_cv_header_endian_h" = xyes
 then :
   printf "%s\n" "#define HAVE_ENDIAN_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "elf.h" "ac_cv_header_elf_h" "$ac_includes_default"
 if test "x$ac_cv_header_elf_h" = xyes
 then :
   printf "%s\n" "#define HAVE_ELF_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "err.h" "ac_cv_header_err_h" "$ac_includes_default"
 if test "x$ac_cv_header_err_h" = xyes
 then :
   printf "%s\n" "#define HAVE_ERR_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "features.h" "ac_cv_header_features_h" "$ac_includes_default"
 if test "x$ac_cv_header_features_h" = xyes
 then :
   printf "%s\n" "#define HAVE_FEATURES_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "fcntl.h" "ac_cv_header_fcntl_h" "$ac_includes_default"
 if test "x$ac_cv_header_fcntl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_FCNTL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "floatingpoint.h" "ac_cv_header_floatingpoint_h" "$ac_includes_default"
 if test "x$ac_cv_header_floatingpoint_h" = xyes
 then :
   printf "%s\n" "#define HAVE_FLOATINGPOINT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "fnmatch.h" "ac_cv_header_fnmatch_h" "$ac_includes_default"
 if test "x$ac_cv_header_fnmatch_h" = xyes
 then :
   printf "%s\n" "#define HAVE_FNMATCH_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "getopt.h" "ac_cv_header_getopt_h" "$ac_includes_default"
 if test "x$ac_cv_header_getopt_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GETOPT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "glob.h" "ac_cv_header_glob_h" "$ac_includes_default"
 if test "x$ac_cv_header_glob_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GLOB_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "ia.h" "ac_cv_header_ia_h" "$ac_includes_default"
 if test "x$ac_cv_header_ia_h" = xyes
 then :
   printf "%s\n" "#define HAVE_IA_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "iaf.h" "ac_cv_header_iaf_h" "$ac_includes_default"
 if test "x$ac_cv_header_iaf_h" = xyes
 then :
   printf "%s\n" "#define HAVE_IAF_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "ifaddrs.h" "ac_cv_header_ifaddrs_h" "$ac_includes_default"
 if test "x$ac_cv_header_ifaddrs_h" = xyes
 then :
   printf "%s\n" "#define HAVE_IFADDRS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "inttypes.h" "ac_cv_header_inttypes_h" "$ac_includes_default"
 if test "x$ac_cv_header_inttypes_h" = xyes
 then :
   printf "%s\n" "#define HAVE_INTTYPES_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "langinfo.h" "ac_cv_header_langinfo_h" "$ac_includes_default"
 if test "x$ac_cv_header_langinfo_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LANGINFO_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "limits.h" "ac_cv_header_limits_h" "$ac_includes_default"
 if test "x$ac_cv_header_limits_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIMITS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "locale.h" "ac_cv_header_locale_h" "$ac_includes_default"
 if test "x$ac_cv_header_locale_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LOCALE_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "login.h" "ac_cv_header_login_h" "$ac_includes_default"
 if test "x$ac_cv_header_login_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGIN_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "maillock.h" "ac_cv_header_maillock_h" "$ac_includes_default"
 if test "x$ac_cv_header_maillock_h" = xyes
 then :
   printf "%s\n" "#define HAVE_MAILLOCK_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "ndir.h" "ac_cv_header_ndir_h" "$ac_includes_default"
 if test "x$ac_cv_header_ndir_h" = xyes
 then :
   printf "%s\n" "#define HAVE_NDIR_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "net/if_tun.h" "ac_cv_header_net_if_tun_h" "$ac_includes_default"
 if test "x$ac_cv_header_net_if_tun_h" = xyes
 then :
   printf "%s\n" "#define HAVE_NET_IF_TUN_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "netdb.h" "ac_cv_header_netdb_h" "$ac_includes_default"
 if test "x$ac_cv_header_netdb_h" = xyes
 then :
   printf "%s\n" "#define HAVE_NETDB_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "netgroup.h" "ac_cv_header_netgroup_h" "$ac_includes_default"
 if test "x$ac_cv_header_netgroup_h" = xyes
 then :
   printf "%s\n" "#define HAVE_NETGROUP_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "pam/pam_appl.h" "ac_cv_header_pam_pam_appl_h" "$ac_includes_default"
 if test "x$ac_cv_header_pam_pam_appl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_PAM_PAM_APPL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "paths.h" "ac_cv_header_paths_h" "$ac_includes_default"
 if test "x$ac_cv_header_paths_h" = xyes
 then :
   printf "%s\n" "#define HAVE_PATHS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "poll.h" "ac_cv_header_poll_h" "$ac_includes_default"
 if test "x$ac_cv_header_poll_h" = xyes
 then :
   printf "%s\n" "#define HAVE_POLL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "pty.h" "ac_cv_header_pty_h" "$ac_includes_default"
 if test "x$ac_cv_header_pty_h" = xyes
 then :
   printf "%s\n" "#define HAVE_PTY_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "readpassphrase.h" "ac_cv_header_readpassphrase_h" "$ac_includes_default"
 if test "x$ac_cv_header_readpassphrase_h" = xyes
 then :
   printf "%s\n" "#define HAVE_READPASSPHRASE_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "rpc/types.h" "ac_cv_header_rpc_types_h" "$ac_includes_default"
 if test "x$ac_cv_header_rpc_types_h" = xyes
 then :
   printf "%s\n" "#define HAVE_RPC_TYPES_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "security/pam_appl.h" "ac_cv_header_security_pam_appl_h" "$ac_includes_default"
 if test "x$ac_cv_header_security_pam_appl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SECURITY_PAM_APPL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sha2.h" "ac_cv_header_sha2_h" "$ac_includes_default"
 if test "x$ac_cv_header_sha2_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SHA2_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "shadow.h" "ac_cv_header_shadow_h" "$ac_includes_default"
 if test "x$ac_cv_header_shadow_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SHADOW_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "stddef.h" "ac_cv_header_stddef_h" "$ac_includes_default"
 if test "x$ac_cv_header_stddef_h" = xyes
 then :
   printf "%s\n" "#define HAVE_STDDEF_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "stdint.h" "ac_cv_header_stdint_h" "$ac_includes_default"
 if test "x$ac_cv_header_stdint_h" = xyes
 then :
   printf "%s\n" "#define HAVE_STDINT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "string.h" "ac_cv_header_string_h" "$ac_includes_default"
 if test "x$ac_cv_header_string_h" = xyes
 then :
   printf "%s\n" "#define HAVE_STRING_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "strings.h" "ac_cv_header_strings_h" "$ac_includes_default"
 if test "x$ac_cv_header_strings_h" = xyes
 then :
   printf "%s\n" "#define HAVE_STRINGS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/bitypes.h" "ac_cv_header_sys_bitypes_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_bitypes_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_BITYPES_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/byteorder.h" "ac_cv_header_sys_byteorder_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_byteorder_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_BYTEORDER_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/bsdtty.h" "ac_cv_header_sys_bsdtty_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_bsdtty_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_BSDTTY_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/cdefs.h" "ac_cv_header_sys_cdefs_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_cdefs_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_CDEFS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/dir.h" "ac_cv_header_sys_dir_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_dir_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_DIR_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/file.h" "ac_cv_header_sys_file_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_file_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_FILE_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/mman.h" "ac_cv_header_sys_mman_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_mman_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_MMAN_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/label.h" "ac_cv_header_sys_label_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_label_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_LABEL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/ndir.h" "ac_cv_header_sys_ndir_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_ndir_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_NDIR_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/param.h" "ac_cv_header_sys_param_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_param_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PARAM_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/poll.h" "ac_cv_header_sys_poll_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_poll_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_POLL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/prctl.h" "ac_cv_header_sys_prctl_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_prctl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PRCTL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/procctl.h" "ac_cv_header_sys_procctl_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_procctl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PROCCTL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/pstat.h" "ac_cv_header_sys_pstat_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_pstat_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PSTAT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/ptrace.h" "ac_cv_header_sys_ptrace_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_ptrace_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PTRACE_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/random.h" "ac_cv_header_sys_random_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_random_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_RANDOM_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/select.h" "ac_cv_header_sys_select_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_select_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_SELECT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/stream.h" "ac_cv_header_sys_stream_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_stream_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_STREAM_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/stropts.h" "ac_cv_header_sys_stropts_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_stropts_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_STROPTS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/strtio.h" "ac_cv_header_sys_strtio_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_strtio_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_STRTIO_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/statvfs.h" "ac_cv_header_sys_statvfs_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_statvfs_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_STATVFS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/sysmacros.h" "ac_cv_header_sys_sysmacros_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_sysmacros_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_SYSMACROS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/time.h" "ac_cv_header_sys_time_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_time_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_TIME_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/timers.h" "ac_cv_header_sys_timers_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_timers_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_TIMERS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/vfs.h" "ac_cv_header_sys_vfs_h" "$ac_includes_default"
 if test "x$ac_cv_header_sys_vfs_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_VFS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "time.h" "ac_cv_header_time_h" "$ac_includes_default"
 if test "x$ac_cv_header_time_h" = xyes
 then :
   printf "%s\n" "#define HAVE_TIME_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "tmpdir.h" "ac_cv_header_tmpdir_h" "$ac_includes_default"
 if test "x$ac_cv_header_tmpdir_h" = xyes
 then :
   printf "%s\n" "#define HAVE_TMPDIR_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "ttyent.h" "ac_cv_header_ttyent_h" "$ac_includes_default"
 if test "x$ac_cv_header_ttyent_h" = xyes
 then :
   printf "%s\n" "#define HAVE_TTYENT_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "ucred.h" "ac_cv_header_ucred_h" "$ac_includes_default"
 if test "x$ac_cv_header_ucred_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UCRED_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "unistd.h" "ac_cv_header_unistd_h" "$ac_includes_default"
 if test "x$ac_cv_header_unistd_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UNISTD_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "usersec.h" "ac_cv_header_usersec_h" "$ac_includes_default"
 if test "x$ac_cv_header_usersec_h" = xyes
 then :
   printf "%s\n" "#define HAVE_USERSEC_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "util.h" "ac_cv_header_util_h" "$ac_includes_default"
 if test "x$ac_cv_header_util_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UTIL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "utime.h" "ac_cv_header_utime_h" "$ac_includes_default"
 if test "x$ac_cv_header_utime_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UTIME_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "utmp.h" "ac_cv_header_utmp_h" "$ac_includes_default"
 if test "x$ac_cv_header_utmp_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UTMP_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "utmpx.h" "ac_cv_header_utmpx_h" "$ac_includes_default"
 if test "x$ac_cv_header_utmpx_h" = xyes
 then :
   printf "%s\n" "#define HAVE_UTMPX_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "vis.h" "ac_cv_header_vis_h" "$ac_includes_default"
 if test "x$ac_cv_header_vis_h" = xyes
 then :
   printf "%s\n" "#define HAVE_VIS_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "wchar.h" "ac_cv_header_wchar_h" "$ac_includes_default"
 if test "x$ac_cv_header_wchar_h" = xyes
 then :
   printf "%s\n" "#define HAVE_WCHAR_H 1" >>confdefs.h
 
 fi
 
 
 # On some platforms (eg SunOS4) sys/audit.h requires sys/[time|types|label.h]
 # to be included first.
 ac_fn_c_check_header_compile "$LINENO" "sys/audit.h" "ac_cv_header_sys_audit_h" "
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_LABEL_H
 # include <sys/label.h>
 #endif
 
 "
 if test "x$ac_cv_header_sys_audit_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_AUDIT_H 1" >>confdefs.h
 
 fi
 
 
 # sys/capsicum.h requires sys/types.h
 ac_fn_c_check_header_compile "$LINENO" "sys/capsicum.h" "ac_cv_header_sys_capsicum_h" "
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 
 "
 if test "x$ac_cv_header_sys_capsicum_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_CAPSICUM_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "capsicum_helpers.h" "ac_cv_header_capsicum_helpers_h" "
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 
 "
 if test "x$ac_cv_header_capsicum_helpers_h" = xyes
 then :
   printf "%s\n" "#define HAVE_CAPSICUM_HELPERS_H 1" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for caph_cache_tzdata" >&5
 printf %s "checking for caph_cache_tzdata... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <capsicum_helpers.h>
 int
 main (void)
 {
 caph_cache_tzdata();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HAVE_CAPH_CACHE_TZDATA 1" >>confdefs.h
 
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 # net/route.h requires sys/socket.h and sys/types.h.
 # sys/sysctl.h also requires sys/param.h
 ac_fn_c_check_header_compile "$LINENO" "net/route.h" "ac_cv_header_net_route_h" "
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <sys/param.h>
 #include <sys/socket.h>
 
 "
 if test "x$ac_cv_header_net_route_h" = xyes
 then :
   printf "%s\n" "#define HAVE_NET_ROUTE_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "sys/sysctl.h" "ac_cv_header_sys_sysctl_h" "
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <sys/param.h>
 #include <sys/socket.h>
 
 "
 if test "x$ac_cv_header_sys_sysctl_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_SYSCTL_H 1" >>confdefs.h
 
 fi
 
 
 # lastlog.h requires sys/time.h to be included first on Solaris
 ac_fn_c_check_header_compile "$LINENO" "lastlog.h" "ac_cv_header_lastlog_h" "
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 
 "
 if test "x$ac_cv_header_lastlog_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LASTLOG_H 1" >>confdefs.h
 
 fi
 
 
 # sys/ptms.h requires sys/stream.h to be included first on Solaris
 ac_fn_c_check_header_compile "$LINENO" "sys/ptms.h" "ac_cv_header_sys_ptms_h" "
 #ifdef HAVE_SYS_STREAM_H
 # include <sys/stream.h>
 #endif
 
 "
 if test "x$ac_cv_header_sys_ptms_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_PTMS_H 1" >>confdefs.h
 
 fi
 
 
 # login_cap.h requires sys/types.h on NetBSD
 ac_fn_c_check_header_compile "$LINENO" "login_cap.h" "ac_cv_header_login_cap_h" "
 #include <sys/types.h>
 
 "
 if test "x$ac_cv_header_login_cap_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGIN_CAP_H 1" >>confdefs.h
 
 fi
 
 
 # older BSDs need sys/param.h before sys/mount.h
 ac_fn_c_check_header_compile "$LINENO" "sys/mount.h" "ac_cv_header_sys_mount_h" "
 #include <sys/param.h>
 
 "
 if test "x$ac_cv_header_sys_mount_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_MOUNT_H 1" >>confdefs.h
 
 fi
 
 
 # Android requires sys/socket.h to be included before sys/un.h
 ac_fn_c_check_header_compile "$LINENO" "sys/un.h" "ac_cv_header_sys_un_h" "
 #include <sys/types.h>
 #include <sys/socket.h>
 
 "
 if test "x$ac_cv_header_sys_un_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYS_UN_H 1" >>confdefs.h
 
 fi
 
 
 # Messages for features tested for in target-specific section
 SIA_MSG="no"
 SPC_MSG="no"
 SP_MSG="no"
 SPP_MSG="no"
 
 # Support for Solaris/Illumos privileges (this test is used by both
 # the --with-solaris-privs option and --with-sandbox=solaris).
 SOLARIS_PRIVS="no"
 
 # Check for some target-specific stuff
 case "$host" in
 *-*-aix*)
 	# Some versions of VAC won't allow macro redefinitions at
 	# -qlanglevel=ansi, and autoconf 2.60 sometimes insists on using that
 	# particularly with older versions of vac or xlc.
 	# It also throws errors about null macro arguments, but these are
 	# not fatal.
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if compiler allows macro redefinitions" >&5
 printf %s "checking if compiler allows macro redefinitions... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #define testmacro foo
 #define testmacro bar
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	      CC="`echo $CC | sed 's/-qlanglvl\=ansi//g'`"
 	      CFLAGS="`echo $CFLAGS | sed 's/-qlanglvl\=ansi//g'`"
 	      CPPFLAGS="`echo $CPPFLAGS | sed 's/-qlanglvl\=ansi//g'`"
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to specify blibpath for linker ($LD)" >&5
 printf %s "checking how to specify blibpath for linker ($LD)... " >&6; }
 	if (test -z "$blibpath"); then
 		blibpath="/usr/lib:/lib"
 	fi
 	saved_LDFLAGS="$LDFLAGS"
 	if test "$GCC" = "yes"; then
 		flags="-Wl,-blibpath: -Wl,-rpath, -blibpath:"
 	else
 		flags="-blibpath: -Wl,-blibpath: -Wl,-rpath,"
 	fi
 	for tryflags in $flags ;do
 		if (test -z "$blibflags"); then
 			LDFLAGS="$saved_LDFLAGS $tryflags$blibpath"
 			cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   blibflags=$tryflags
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 		fi
 	done
 	if (test -z "$blibflags"); then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
 printf "%s\n" "not found" >&6; }
 		as_fn_error $? "*** must be able to specify blibpath on AIX - check config.log" "$LINENO" 5
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $blibflags" >&5
 printf "%s\n" "$blibflags" >&6; }
 	fi
 	LDFLAGS="$saved_LDFLAGS"
 		ac_fn_c_check_func "$LINENO" "authenticate" "ac_cv_func_authenticate"
 if test "x$ac_cv_func_authenticate" = xyes
 then :
 
 printf "%s\n" "#define WITH_AIXAUTHENTICATE 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for authenticate in -ls" >&5
 printf %s "checking for authenticate in -ls... " >&6; }
 if test ${ac_cv_lib_s_authenticate+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ls  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char authenticate ();
 int
 main (void)
 {
 return authenticate ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_s_authenticate=yes
 else $as_nop
   ac_cv_lib_s_authenticate=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_s_authenticate" >&5
 printf "%s\n" "$ac_cv_lib_s_authenticate" >&6; }
 if test "x$ac_cv_lib_s_authenticate" = xyes
 then :
    printf "%s\n" "#define WITH_AIXAUTHENTICATE 1" >>confdefs.h
 
 				LIBS="$LIBS -ls"
 
 fi
 
 
 fi
 
 		ac_fn_check_decl "$LINENO" "authenticate" "ac_cv_have_decl_authenticate" "#include <usersec.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_authenticate" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_AUTHENTICATE $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "loginrestrictions" "ac_cv_have_decl_loginrestrictions" "#include <usersec.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_loginrestrictions" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_LOGINRESTRICTIONS $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "loginsuccess" "ac_cv_have_decl_loginsuccess" "#include <usersec.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_loginsuccess" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_LOGINSUCCESS $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "passwdexpired" "ac_cv_have_decl_passwdexpired" "#include <usersec.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_passwdexpired" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_PASSWDEXPIRED $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "setauthdb" "ac_cv_have_decl_setauthdb" "#include <usersec.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_setauthdb" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_SETAUTHDB $ac_have_decl" >>confdefs.h
 
 		ac_fn_check_decl "$LINENO" "loginfailed" "ac_cv_have_decl_loginfailed" "#include <usersec.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_loginfailed" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_LOGINFAILED $ac_have_decl" >>confdefs.h
 if test $ac_have_decl = 1
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if loginfailed takes 4 arguments" >&5
 printf %s "checking if loginfailed takes 4 arguments... " >&6; }
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <usersec.h>
 int
 main (void)
 {
  (void)loginfailed("user","host","tty",0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define AIX_LOGINFAILED_4ARG 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 	ac_fn_c_check_func "$LINENO" "getgrset" "ac_cv_func_getgrset"
 if test "x$ac_cv_func_getgrset" = xyes
 then :
   printf "%s\n" "#define HAVE_GETGRSET 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setauthdb" "ac_cv_func_setauthdb"
 if test "x$ac_cv_func_setauthdb" = xyes
 then :
   printf "%s\n" "#define HAVE_SETAUTHDB 1" >>confdefs.h
 
 fi
 
 	ac_fn_check_decl "$LINENO" "F_CLOSEM" "ac_cv_have_decl_F_CLOSEM" " #include <limits.h>
 	      #include <fcntl.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_F_CLOSEM" = xyes
 then :
 
 printf "%s\n" "#define HAVE_FCNTL_CLOSEM 1" >>confdefs.h
 
 fi
 	check_for_aix_broken_getaddrinfo=1
 
 printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_LASTLOG 1" >>confdefs.h
 
 
 printf "%s\n" "#define LOGIN_NEEDS_UTMPX 1" >>confdefs.h
 
 
 printf "%s\n" "#define SPT_TYPE SPT_REUSEARGV" >>confdefs.h
 
 
 printf "%s\n" "#define SSHPAM_CHAUTHTOK_NEEDS_RUID 1" >>confdefs.h
 
 
 printf "%s\n" "#define PTY_ZEROREAD 1" >>confdefs.h
 
 
 printf "%s\n" "#define PLATFORM_SYS_DIR_UID 2" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_STRNDUP 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_STRNLEN 1" >>confdefs.h
 
 	;;
 *-*-android*)
 
 printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_WTMP 1" >>confdefs.h
 
 	;;
 *-*-cygwin*)
 	LIBS="$LIBS /usr/lib/textreadmode.o"
 
 printf "%s\n" "#define HAVE_CYGWIN 1" >>confdefs.h
 
 
 printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 
 printf "%s\n" "#define NO_UID_RESTORATION_TEST 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_SHADOW 1" >>confdefs.h
 
 
 printf "%s\n" "#define NO_X11_UNIX_SOCKETS 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_IOBUFSZ 65535" >>confdefs.h
 
 
 printf "%s\n" "#define FILESYSTEM_NO_BACKSLASH 1" >>confdefs.h
 
 	# Cygwin defines optargs, optargs as declspec(dllimport) for historical
 	# reasons which cause compile warnings, so we disable those warnings.
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -Wno-attributes" >&5
 printf %s "checking if $CC supports compile flag -Wno-attributes... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -Wno-attributes"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-Wno-attributes"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	;;
 *-*-dgux*)
 
 printf "%s\n" "#define IP_TOS_IS_BROKEN 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	;;
 *-*-darwin*)
 	use_pie=auto
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we have working getaddrinfo" >&5
 printf %s "checking if we have working getaddrinfo... " >&6; }
 	if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: assume it is working" >&5
 printf "%s\n" "assume it is working" >&6; }
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <mach-o/dyld.h>
 #include <stdlib.h>
 int main(void) { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
 		exit(0);
 	else
 		exit(1);
 }
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: working" >&5
 printf "%s\n" "working" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: buggy" >&5
 printf "%s\n" "buggy" >&6; }
 
 printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_GLOB 1" >>confdefs.h
 
 
 printf "%s\n" "#define BIND_8_COMPAT 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_FREEBSD 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_COMPAT_AF 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_PREPEND_AF 1" >>confdefs.h
 
 
 	ac_fn_check_decl "$LINENO" "AU_IPv4" "ac_cv_have_decl_AU_IPv4" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_AU_IPv4" = xyes
 then :
 
 else $as_nop
 
 printf "%s\n" "#define AU_IPv4 0" >>confdefs.h
 
 	    #include <bsm/audit.h>
 
 printf "%s\n" "#define LASTLOG_WRITE_PUTUTXLINE 1" >>confdefs.h
 
 
 fi
 
 printf "%s\n" "#define SPT_TYPE SPT_REUSEARGV" >>confdefs.h
 
 	ac_fn_c_check_func "$LINENO" "sandbox_init" "ac_cv_func_sandbox_init"
 if test "x$ac_cv_func_sandbox_init" = xyes
 then :
   printf "%s\n" "#define HAVE_SANDBOX_INIT 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_header_compile "$LINENO" "sandbox.h" "ac_cv_header_sandbox_h" "$ac_includes_default"
 if test "x$ac_cv_header_sandbox_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SANDBOX_H 1" >>confdefs.h
 
 fi
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sandbox_apply in -lsandbox" >&5
 printf %s "checking for sandbox_apply in -lsandbox... " >&6; }
 if test ${ac_cv_lib_sandbox_sandbox_apply+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lsandbox  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char sandbox_apply ();
 int
 main (void)
 {
 return sandbox_apply ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_sandbox_sandbox_apply=yes
 else $as_nop
   ac_cv_lib_sandbox_sandbox_apply=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sandbox_sandbox_apply" >&5
 printf "%s\n" "$ac_cv_lib_sandbox_sandbox_apply" >&6; }
 if test "x$ac_cv_lib_sandbox_sandbox_apply" = xyes
 then :
 
 	    SSHDLIBS="$SSHDLIBS -lsandbox"
 
 fi
 
 	# proc_pidinfo()-based closefrom() replacement.
 	ac_fn_c_check_header_compile "$LINENO" "libproc.h" "ac_cv_header_libproc_h" "$ac_includes_default"
 if test "x$ac_cv_header_libproc_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBPROC_H 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_func "$LINENO" "proc_pidinfo" "ac_cv_func_proc_pidinfo"
 if test "x$ac_cv_func_proc_pidinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_PROC_PIDINFO 1" >>confdefs.h
 
 fi
 
 	# poll(2) is broken for character-special devices (at least).
 	# cf. Apple bug 3710161 (not public, but searchable)
 
 printf "%s\n" "#define BROKEN_POLL 1" >>confdefs.h
 
 	;;
 *-*-dragonfly*)
 	SSHDLIBS="$SSHDLIBS"
 	TEST_MALLOC_OPTIONS="AFGJPRX"
 	;;
 *-*-haiku*)
 	LIBS="$LIBS -lbsd "
 	CFLAGS="$CFLAGS -D_BSD_SOURCE"
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for socket in -lnetwork" >&5
 printf %s "checking for socket in -lnetwork... " >&6; }
 if test ${ac_cv_lib_network_socket+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lnetwork  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char socket ();
 int
 main (void)
 {
 return socket ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_network_socket=yes
 else $as_nop
   ac_cv_lib_network_socket=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_network_socket" >&5
 printf "%s\n" "$ac_cv_lib_network_socket" >&6; }
 if test "x$ac_cv_lib_network_socket" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBNETWORK 1" >>confdefs.h
 
   LIBS="-lnetwork $LIBS"
 
 fi
 
 	printf "%s\n" "#define HAVE_U_INT64_T 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_UTMPX 1" >>confdefs.h
 
 	MANTYPE=man
 	;;
 *-*-hpux*)
 	# first we define all of the options common to all HP-UX releases
 	CPPFLAGS="$CPPFLAGS -D_HPUX_SOURCE -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1"
 	IPADDR_IN_DISPLAY=yes
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define LOGIN_NEEDS_UTMPX 1" >>confdefs.h
 
 
 printf "%s\n" "#define LOCKED_PASSWD_STRING \"*\"" >>confdefs.h
 
 	printf "%s\n" "#define SPT_TYPE SPT_PSTAT" >>confdefs.h
 
 
 printf "%s\n" "#define PLATFORM_SYS_DIR_UID 2" >>confdefs.h
 
 	maildir="/var/mail"
 	LIBS="$LIBS -lsec"
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for t_error in -lxnet" >&5
 printf %s "checking for t_error in -lxnet... " >&6; }
 if test ${ac_cv_lib_xnet_t_error+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lxnet  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char t_error ();
 int
 main (void)
 {
 return t_error ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_xnet_t_error=yes
 else $as_nop
   ac_cv_lib_xnet_t_error=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_xnet_t_error" >&5
 printf "%s\n" "$ac_cv_lib_xnet_t_error" >&6; }
 if test "x$ac_cv_lib_xnet_t_error" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBXNET 1" >>confdefs.h
 
   LIBS="-lxnet $LIBS"
 
 else $as_nop
   as_fn_error $? "*** -lxnet needed on HP-UX - check config.log ***" "$LINENO" 5
 fi
 
 
 	# next, we define all of the options specific to major releases
 	case "$host" in
 	*-*-hpux10*)
 		if test -z "$GCC"; then
 			CFLAGS="$CFLAGS -Ae"
 		fi
 
 printf "%s\n" "#define BROKEN_GETLINE 1" >>confdefs.h
 
 		;;
 	*-*-hpux11*)
 
 printf "%s\n" "#define PAM_SUN_CODEBASE 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 
 printf "%s\n" "#define USE_BTMP 1" >>confdefs.h
 
 		check_for_hpux_broken_getaddrinfo=1
 		check_for_conflicting_getspnam=1
 		;;
 	esac
 
 	# lastly, we define options specific to minor releases
 	case "$host" in
 	*-*-hpux10.26)
 
 printf "%s\n" "#define HAVE_SECUREWARE 1" >>confdefs.h
 
 		disable_ptmx_check=yes
 		LIBS="$LIBS -lsecpw"
 		;;
 	esac
 	;;
 *-*-irix5*)
 	PATH="$PATH:/usr/etc"
 
 printf "%s\n" "#define BROKEN_INET_NTOA 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define WITH_ABBREV_NO_TTY 1" >>confdefs.h
 
 	printf "%s\n" "#define LOCKED_PASSWD_STRING \"*LK*\"" >>confdefs.h
 
 	;;
 *-*-irix6*)
 	PATH="$PATH:/usr/etc"
 
 printf "%s\n" "#define WITH_IRIX_ARRAY 1" >>confdefs.h
 
 
 printf "%s\n" "#define WITH_IRIX_PROJECT 1" >>confdefs.h
 
 
 printf "%s\n" "#define WITH_IRIX_AUDIT 1" >>confdefs.h
 
 	ac_fn_c_check_func "$LINENO" "jlimit_startjob" "ac_cv_func_jlimit_startjob"
 if test "x$ac_cv_func_jlimit_startjob" = xyes
 then :
 
 printf "%s\n" "#define WITH_IRIX_JOBS 1" >>confdefs.h
 
 fi
 
 	printf "%s\n" "#define BROKEN_INET_NTOA 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_UPDWTMPX 1" >>confdefs.h
 
 	printf "%s\n" "#define WITH_ABBREV_NO_TTY 1" >>confdefs.h
 
 	printf "%s\n" "#define LOCKED_PASSWD_STRING \"*LK*\"" >>confdefs.h
 
 	;;
 *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 	printf "%s\n" "#define PAM_TTY_KLUDGE 1" >>confdefs.h
 
 	printf "%s\n" "#define LOCKED_PASSWD_PREFIX \"!\"" >>confdefs.h
 
 	printf "%s\n" "#define SPT_TYPE SPT_REUSEARGV" >>confdefs.h
 
 
 printf "%s\n" "#define _PATH_BTMP \"/var/log/btmp\"" >>confdefs.h
 
 
 printf "%s\n" "#define USE_BTMP 1" >>confdefs.h
 
 	;;
 *-*-linux*)
 	no_dev_ptmx=1
 	use_pie=auto
 	check_for_openpty_ctty_bug=1
 				CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE"
 
 printf "%s\n" "#define BROKEN_CLOSEFROM 1" >>confdefs.h
 
 
 printf "%s\n" "#define PAM_TTY_KLUDGE 1" >>confdefs.h
 
 
 printf "%s\n" "#define LOCKED_PASSWD_PREFIX \"!\"" >>confdefs.h
 
 	printf "%s\n" "#define SPT_TYPE SPT_REUSEARGV" >>confdefs.h
 
 
 printf "%s\n" "#define LINK_OPNOTSUPP_ERRNO EPERM" >>confdefs.h
 
 
 printf "%s\n" "#define _PATH_BTMP \"/var/log/btmp\"" >>confdefs.h
 
 	printf "%s\n" "#define USE_BTMP 1" >>confdefs.h
 
 
 printf "%s\n" "#define LINUX_OOM_ADJUST 1" >>confdefs.h
 
 	inet6_default_4in6=yes
 	case `uname -r` in
 	1.*|2.0.*)
 
 printf "%s\n" "#define BROKEN_CMSG_TYPE 1" >>confdefs.h
 
 		;;
 	esac
 	# tun(4) forwarding compat code
 	ac_fn_c_check_header_compile "$LINENO" "linux/if_tun.h" "ac_cv_header_linux_if_tun_h" "$ac_includes_default"
 if test "x$ac_cv_header_linux_if_tun_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LINUX_IF_TUN_H 1" >>confdefs.h
 
 fi
 
 	if test "x$ac_cv_header_linux_if_tun_h" = "xyes" ; then
 
 printf "%s\n" "#define SSH_TUN_LINUX 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_COMPAT_AF 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_PREPEND_AF 1" >>confdefs.h
 
 	fi
 	ac_fn_c_check_header_compile "$LINENO" "linux/if.h" "ac_cv_header_linux_if_h" "
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 
 "
 if test "x$ac_cv_header_linux_if_h" = xyes
 then :
 
 printf "%s\n" "#define SYS_RDOMAIN_LINUX 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_header_compile "$LINENO" "linux/seccomp.h" "ac_cv_header_linux_seccomp_h" "#include <linux/types.h>
 "
 if test "x$ac_cv_header_linux_seccomp_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LINUX_SECCOMP_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "linux/filter.h" "ac_cv_header_linux_filter_h" "#include <linux/types.h>
 "
 if test "x$ac_cv_header_linux_filter_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LINUX_FILTER_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "linux/audit.h" "ac_cv_header_linux_audit_h" "#include <linux/types.h>
 "
 if test "x$ac_cv_header_linux_audit_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LINUX_AUDIT_H 1" >>confdefs.h
 
 fi
 
 	# Obtain MIPS ABI
 	case "$host" in
 	mips*)
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #if _MIPS_SIM != _ABIO32
 #error
 #endif
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   mips_abi="o32"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #if _MIPS_SIM != _ABIN32
 #error
 #endif
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   mips_abi="n32"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #if _MIPS_SIM != _ABI64
 #error
 #endif
 
 int
 main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   mips_abi="n64"
 else $as_nop
   as_fn_error $? "unknown MIPS ABI" "$LINENO" 5
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 		;;
 	esac
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for seccomp architecture" >&5
 printf %s "checking for seccomp architecture... " >&6; }
 	seccomp_audit_arch=
 	case "$host" in
 	x86_64-*)
 		seccomp_audit_arch=AUDIT_ARCH_X86_64
 		;;
 	i*86-*)
 		seccomp_audit_arch=AUDIT_ARCH_I386
 		;;
 	arm*-*)
 		seccomp_audit_arch=AUDIT_ARCH_ARM
 		;;
 	aarch64*-*)
 		seccomp_audit_arch=AUDIT_ARCH_AARCH64
 		;;
 	s390x-*)
 		seccomp_audit_arch=AUDIT_ARCH_S390X
 		;;
 	s390-*)
 		seccomp_audit_arch=AUDIT_ARCH_S390
 		;;
 	powerpc-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC
 		;;
 	powerpc64-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC64
 		;;
 	powerpc64le-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC64LE
 		;;
 	mips-*)
 		seccomp_audit_arch=AUDIT_ARCH_MIPS
 		;;
 	mipsel-*)
 		seccomp_audit_arch=AUDIT_ARCH_MIPSEL
 		;;
 	mips64-*)
 		case "$mips_abi" in
 		"n32")
 			seccomp_audit_arch=AUDIT_ARCH_MIPS64N32
 			;;
 		"n64")
 			seccomp_audit_arch=AUDIT_ARCH_MIPS64
 			;;
 		esac
 		;;
 	mips64el-*)
 		case "$mips_abi" in
 		"n32")
 			seccomp_audit_arch=AUDIT_ARCH_MIPSEL64N32
 			;;
 		"n64")
 			seccomp_audit_arch=AUDIT_ARCH_MIPSEL64
 			;;
 		esac
 		;;
 	riscv64-*)
 		seccomp_audit_arch=AUDIT_ARCH_RISCV64
 		;;
 	esac
 	if test "x$seccomp_audit_arch" != "x" ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: \"$seccomp_audit_arch\"" >&5
 printf "%s\n" "\"$seccomp_audit_arch\"" >&6; }
 
 printf "%s\n" "#define SECCOMP_AUDIT_ARCH $seccomp_audit_arch" >>confdefs.h
 
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: architecture not supported" >&5
 printf "%s\n" "architecture not supported" >&6; }
 	fi
 	;;
 *-*-minix)
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	# poll(2) seems to choke on /dev/null; "Bad file descriptor"
 
 printf "%s\n" "#define BROKEN_POLL 1" >>confdefs.h
 
 	;;
 mips-sony-bsd|mips-sony-newsos4)
 
 printf "%s\n" "#define NEED_SETPGRP 1" >>confdefs.h
 
 	SONY=1
 	;;
 *-*-netbsd*)
 	if test "x$withval" != "xno" ; then
 		rpath_opt="-R"
 	fi
 	CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
 
 printf "%s\n" "#define SSH_TUN_FREEBSD 1" >>confdefs.h
 
 	ac_fn_c_check_header_compile "$LINENO" "net/if_tap.h" "ac_cv_header_net_if_tap_h" "$ac_includes_default"
 if test "x$ac_cv_header_net_if_tap_h" = xyes
 then :
 
 else $as_nop
 
 printf "%s\n" "#define SSH_TUN_NO_L2 1" >>confdefs.h
 
 fi
 
 
 printf "%s\n" "#define SSH_TUN_PREPEND_AF 1" >>confdefs.h
 
 	TEST_MALLOC_OPTIONS="AJRX"
 
 printf "%s\n" "#define BROKEN_READ_COMPARISON 1" >>confdefs.h
 
 	;;
 *-*-freebsd*)
 
 printf "%s\n" "#define LOCKED_PASSWD_PREFIX \"*LOCKED*\"" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_FREEBSD 1" >>confdefs.h
 
 	ac_fn_c_check_header_compile "$LINENO" "net/if_tap.h" "ac_cv_header_net_if_tap_h" "$ac_includes_default"
 if test "x$ac_cv_header_net_if_tap_h" = xyes
 then :
 
 else $as_nop
 
 printf "%s\n" "#define SSH_TUN_NO_L2 1" >>confdefs.h
 
 fi
 
 
 printf "%s\n" "#define BROKEN_GLOB 1" >>confdefs.h
 
 	TEST_MALLOC_OPTIONS="AJRX"
 	# Preauth crypto occasionally uses file descriptors for crypto offload
 	# and will crash if they cannot be opened.
 
 printf "%s\n" "#define SANDBOX_SKIP_RLIMIT_NOFILE 1" >>confdefs.h
 
 	case "$host" in
 	*-*-freebsd9.*|*-*-freebsd10.*)
 		# Capsicum on 9 and 10 do not allow ppoll() so don't auto-enable.
 		disable_capsicum=yes
 	esac
 	;;
 *-*-bsdi*)
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	;;
 *-next-*)
 	conf_lastlog_location="/usr/adm/lastlog"
 	conf_utmp_location=/etc/utmp
 	conf_wtmp_location=/usr/adm/wtmp
 	maildir=/usr/spool/mail
 
 printf "%s\n" "#define HAVE_NEXT 1" >>confdefs.h
 
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_SAVED_UIDS 1" >>confdefs.h
 
 	;;
 *-*-openbsd*)
 	use_pie=auto
 
 printf "%s\n" "#define HAVE_ATTRIBUTE__SENTINEL__ 1" >>confdefs.h
 
 
 printf "%s\n" "#define HAVE_ATTRIBUTE__BOUNDED__ 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSH_TUN_OPENBSD 1" >>confdefs.h
 
 
 printf "%s\n" "#define SYSLOG_R_SAFE_IN_SIGHAND 1" >>confdefs.h
 
 	TEST_MALLOC_OPTIONS="AFGJPRX"
 	;;
 *-*-solaris*)
 	if test "x$withval" != "xno" ; then
 		rpath_opt="-R"
 	fi
 	printf "%s\n" "#define PAM_SUN_CODEBASE 1" >>confdefs.h
 
 	printf "%s\n" "#define LOGIN_NEEDS_UTMPX 1" >>confdefs.h
 
 	printf "%s\n" "#define PAM_TTY_KLUDGE 1" >>confdefs.h
 
 
 printf "%s\n" "#define SSHPAM_CHAUTHTOK_NEEDS_RUID 1" >>confdefs.h
 
 	printf "%s\n" "#define LOCKED_PASSWD_STRING \"*LK*\"" >>confdefs.h
 
 	# Pushing STREAMS modules will cause sshd to acquire a controlling tty.
 
 printf "%s\n" "#define SSHD_ACQUIRES_CTTY 1" >>confdefs.h
 
 
 printf "%s\n" "#define PASSWD_NEEDS_USERNAME 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_TCGETATTR_ICANON 1" >>confdefs.h
 
 	external_path_file=/etc/default/login
 	# hardwire lastlog location (can't detect it on some versions)
 	conf_lastlog_location="/var/adm/lastlog"
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for obsolete utmp and wtmp in solaris2.x" >&5
 printf %s "checking for obsolete utmp and wtmp in solaris2.x... " >&6; }
 	sol2ver=`echo "$host"| sed -e 's/.*[0-9]\.//'`
 	if test "$sol2ver" -ge 8; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 		printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_WTMP 1" >>confdefs.h
 
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 	ac_fn_c_check_func "$LINENO" "setpflags" "ac_cv_func_setpflags"
 if test "x$ac_cv_func_setpflags" = xyes
 then :
   printf "%s\n" "#define HAVE_SETPFLAGS 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_func "$LINENO" "setppriv" "ac_cv_func_setppriv"
 if test "x$ac_cv_func_setppriv" = xyes
 then :
   printf "%s\n" "#define HAVE_SETPPRIV 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_func "$LINENO" "priv_basicset" "ac_cv_func_priv_basicset"
 if test "x$ac_cv_func_priv_basicset" = xyes
 then :
   printf "%s\n" "#define HAVE_PRIV_BASICSET 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_header_compile "$LINENO" "priv.h" "ac_cv_header_priv_h" "$ac_includes_default"
 if test "x$ac_cv_header_priv_h" = xyes
 then :
   printf "%s\n" "#define HAVE_PRIV_H 1" >>confdefs.h
 
 fi
 
 
 # Check whether --with-solaris-contracts was given.
 if test ${with_solaris_contracts+y}
 then :
   withval=$with_solaris_contracts;
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ct_tmpl_activate in -lcontract" >&5
 printf %s "checking for ct_tmpl_activate in -lcontract... " >&6; }
 if test ${ac_cv_lib_contract_ct_tmpl_activate+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lcontract  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char ct_tmpl_activate ();
 int
 main (void)
 {
 return ct_tmpl_activate ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_contract_ct_tmpl_activate=yes
 else $as_nop
   ac_cv_lib_contract_ct_tmpl_activate=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_contract_ct_tmpl_activate" >&5
 printf "%s\n" "$ac_cv_lib_contract_ct_tmpl_activate" >&6; }
 if test "x$ac_cv_lib_contract_ct_tmpl_activate" = xyes
 then :
 
 printf "%s\n" "#define USE_SOLARIS_PROCESS_CONTRACTS 1" >>confdefs.h
 
 			  LIBS="$LIBS -lcontract"
 			  SPC_MSG="yes"
 fi
 
 
 fi
 
 
 # Check whether --with-solaris-projects was given.
 if test ${with_solaris_projects+y}
 then :
   withval=$with_solaris_projects;
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for setproject in -lproject" >&5
 printf %s "checking for setproject in -lproject... " >&6; }
 if test ${ac_cv_lib_project_setproject+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lproject  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char setproject ();
 int
 main (void)
 {
 return setproject ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_project_setproject=yes
 else $as_nop
   ac_cv_lib_project_setproject=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_project_setproject" >&5
 printf "%s\n" "$ac_cv_lib_project_setproject" >&6; }
 if test "x$ac_cv_lib_project_setproject" = xyes
 then :
 
 printf "%s\n" "#define USE_SOLARIS_PROJECTS 1" >>confdefs.h
 
 			LIBS="$LIBS -lproject"
 			SP_MSG="yes"
 fi
 
 
 fi
 
 
 # Check whether --with-solaris-privs was given.
 if test ${with_solaris_privs+y}
 then :
   withval=$with_solaris_privs;
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Solaris/Illumos privilege support" >&5
 printf %s "checking for Solaris/Illumos privilege support... " >&6; }
 		if test "x$ac_cv_func_setppriv" = "xyes" -a \
 			"x$ac_cv_header_priv_h" = "xyes" ; then
 			SOLARIS_PRIVS=yes
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found" >&5
 printf "%s\n" "found" >&6; }
 
 printf "%s\n" "#define NO_UID_RESTORATION_TEST 1" >>confdefs.h
 
 
 printf "%s\n" "#define USE_SOLARIS_PRIVS 1" >>confdefs.h
 
 			SPP_MSG="yes"
 		else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
 printf "%s\n" "not found" >&6; }
 			as_fn_error $? "*** must have support for Solaris privileges to use --with-solaris-privs" "$LINENO" 5
 		fi
 
 fi
 
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	;;
 *-*-sunos4*)
 	CPPFLAGS="$CPPFLAGS -DSUNOS4"
 	ac_fn_c_check_func "$LINENO" "getpwanam" "ac_cv_func_getpwanam"
 if test "x$ac_cv_func_getpwanam" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPWANAM 1" >>confdefs.h
 
 fi
 
 	printf "%s\n" "#define PAM_SUN_CODEBASE 1" >>confdefs.h
 
 	conf_utmp_location=/etc/utmp
 	conf_wtmp_location=/var/adm/wtmp
 	conf_lastlog_location=/var/adm/lastlog
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_UTMPX 1" >>confdefs.h
 
 	;;
 *-ncr-sysv*)
 	LIBS="$LIBS -lc89"
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define SSHD_ACQUIRES_CTTY 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	;;
 *-sni-sysv*)
 	# /usr/ucblib MUST NOT be searched on ReliantUNIX
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlsym in -ldl" >&5
 printf %s "checking for dlsym in -ldl... " >&6; }
 if test ${ac_cv_lib_dl_dlsym+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dlsym ();
 int
 main (void)
 {
 return dlsym ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_dl_dlsym=yes
 else $as_nop
   ac_cv_lib_dl_dlsym=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlsym" >&5
 printf "%s\n" "$ac_cv_lib_dl_dlsym" >&6; }
 if test "x$ac_cv_lib_dl_dlsym" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBDL 1" >>confdefs.h
 
   LIBS="-ldl $LIBS"
 
 fi
 
 	# -lresolv needs to be at the end of LIBS or DNS lookups break
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for res_query in -lresolv" >&5
 printf %s "checking for res_query in -lresolv... " >&6; }
 if test ${ac_cv_lib_resolv_res_query+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lresolv  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char res_query ();
 int
 main (void)
 {
 return res_query ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_resolv_res_query=yes
 else $as_nop
   ac_cv_lib_resolv_res_query=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_resolv_res_query" >&5
 printf "%s\n" "$ac_cv_lib_resolv_res_query" >&6; }
 if test "x$ac_cv_lib_resolv_res_query" = xyes
 then :
    LIBS="$LIBS -lresolv"
 fi
 
 	IPADDR_IN_DISPLAY=yes
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define IP_TOS_IS_BROKEN 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	printf "%s\n" "#define SSHD_ACQUIRES_CTTY 1" >>confdefs.h
 
 	external_path_file=/etc/default/login
 	# /usr/ucblib/libucb.a no longer needed on ReliantUNIX
 	# Attention: always take care to bind libsocket and libnsl before libc,
 	# otherwise you will find lots of "SIOCGPGRP errno 22" on syslog
 	;;
 # UnixWare 1.x, UnixWare 2.x, and others based on code from Univel.
 *-*-sysv4.2*)
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define PASSWD_NEEDS_USERNAME 1" >>confdefs.h
 
 	printf "%s\n" "#define LOCKED_PASSWD_STRING \"*LK*\"" >>confdefs.h
 
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	;;
 # UnixWare 7.x, OpenUNIX 8
 *-*-sysv5*)
 	CPPFLAGS="$CPPFLAGS -Dvsnprintf=_xvsnprintf -Dsnprintf=_xsnprintf"
 
 printf "%s\n" "#define UNIXWARE_LONG_PASSWORDS 1" >>confdefs.h
 
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	printf "%s\n" "#define PASSWD_NEEDS_USERNAME 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_TCGETATTR_ICANON 1" >>confdefs.h
 
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	case "$host" in
 	*-*-sysv5SCO_SV*)	# SCO OpenServer 6.x
 		maildir=/var/spool/mail
 		printf "%s\n" "#define BROKEN_UPDWTMPX 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getluid in -lprot" >&5
 printf %s "checking for getluid in -lprot... " >&6; }
 if test ${ac_cv_lib_prot_getluid+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lprot  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char getluid ();
 int
 main (void)
 {
 return getluid ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_prot_getluid=yes
 else $as_nop
   ac_cv_lib_prot_getluid=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_prot_getluid" >&5
 printf "%s\n" "$ac_cv_lib_prot_getluid" >&6; }
 if test "x$ac_cv_lib_prot_getluid" = xyes
 then :
    LIBS="$LIBS -lprot"
 			ac_fn_c_check_func "$LINENO" "getluid" "ac_cv_func_getluid"
 if test "x$ac_cv_func_getluid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETLUID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setluid" "ac_cv_func_setluid"
 if test "x$ac_cv_func_setluid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETLUID 1" >>confdefs.h
 
 fi
 
 
 fi
 
 		;;
 	*)	printf "%s\n" "#define LOCKED_PASSWD_STRING \"*LK*\"" >>confdefs.h
 
 		;;
 	esac
 	;;
 *-*-sysv*)
 	;;
 # SCO UNIX and OEM versions of SCO UNIX
 *-*-sco3.2v4*)
 	as_fn_error $? "\"This Platform is no longer supported.\"" "$LINENO" 5
 	;;
 # SCO OpenServer 5.x
 *-*-sco3.2v5*)
 	if test -z "$GCC"; then
 		CFLAGS="$CFLAGS -belf"
 	fi
 	LIBS="$LIBS -lprot -lx -ltinfo -lm"
 	no_dev_ptmx=1
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define HAVE_SECUREWARE 1" >>confdefs.h
 
 	printf "%s\n" "#define DISABLE_SHADOW 1" >>confdefs.h
 
 	printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 	printf "%s\n" "#define WITH_ABBREV_NO_TTY 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_UPDWTMPX 1" >>confdefs.h
 
 	printf "%s\n" "#define PASSWD_NEEDS_USERNAME 1" >>confdefs.h
 
 	ac_fn_c_check_func "$LINENO" "getluid" "ac_cv_func_getluid"
 if test "x$ac_cv_func_getluid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETLUID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setluid" "ac_cv_func_setluid"
 if test "x$ac_cv_func_setluid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETLUID 1" >>confdefs.h
 
 fi
 
 	MANTYPE=man
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	SKIP_DISABLE_LASTLOG_DEFINE=yes
 	;;
 *-dec-osf*)
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Digital Unix SIA" >&5
 printf %s "checking for Digital Unix SIA... " >&6; }
 	no_osfsia=""
 
 # Check whether --with-osfsia was given.
 if test ${with_osfsia+y}
 then :
   withval=$with_osfsia;
 			if test "x$withval" = "xno" ; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
 printf "%s\n" "disabled" >&6; }
 				no_osfsia=1
 			fi
 
 fi
 
 	if test -z "$no_osfsia" ; then
 		if test -f /etc/sia/matrix.conf; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HAVE_OSF_SIA 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_LOGIN 1" >>confdefs.h
 
 			printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
 
 			LIBS="$LIBS -lsecurity -ldb -lm -laud"
 			SIA_MSG="yes"
 		else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define LOCKED_PASSWD_SUBSTR \"Nologin\"" >>confdefs.h
 
 		fi
 	fi
 	printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 	printf "%s\n" "#define SETEUID_BREAKS_SETUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREUID 1" >>confdefs.h
 
 	printf "%s\n" "#define BROKEN_SETREGID 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_READV_COMPARISON 1" >>confdefs.h
 
 	;;
 
 *-*-nto-qnx*)
 	printf "%s\n" "#define USE_PIPES 1" >>confdefs.h
 
 	printf "%s\n" "#define NO_X11_UNIX_SOCKETS 1" >>confdefs.h
 
 	printf "%s\n" "#define DISABLE_LASTLOG 1" >>confdefs.h
 
 	printf "%s\n" "#define SSHD_ACQUIRES_CTTY 1" >>confdefs.h
 
 
 printf "%s\n" "#define BROKEN_SHADOW_EXPIRE 1" >>confdefs.h
 
 	enable_etc_default_login=no	# has incompatible /etc/default/login
 	case "$host" in
 	*-*-nto-qnx6*)
 		printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
 
 		;;
 	esac
 	;;
 
 *-*-ultrix*)
 
 printf "%s\n" "#define BROKEN_GETGROUPS 1" >>confdefs.h
 
 
 printf "%s\n" "#define NEED_SETPGRP 1" >>confdefs.h
 
 
 printf "%s\n" "#define HAVE_SYS_SYSLOG_H 1" >>confdefs.h
 
 
 printf "%s\n" "#define DISABLE_UTMPX 1" >>confdefs.h
 
 	# DISABLE_FD_PASSING so that we call setpgrp as root, otherwise we
 	# don't get a controlling tty.
 
 printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
 
 	# On Ultrix some headers are not protected against multiple includes,
 	# so we create wrappers and put it where the compiler will find it.
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: creating compat wrappers for headers" >&5
 printf "%s\n" "$as_me: WARNING: creating compat wrappers for headers" >&2;}
 	mkdir -p netinet
 	for header in netinet/ip.h netdb.h resolv.h; do
 		name=`echo $header | tr 'a-z/.' 'A-Z__'`
 		cat >$header <<EOD
 #ifndef _SSH_COMPAT_${name}
 #define _SSH_COMPAT_${name}
 #include "/usr/include/${header}"
 #endif
 EOD
 	done
 	;;
 
 *-*-lynxos)
 	CFLAGS="$CFLAGS -D__NO_INCLUDE_WARN__"
 
 printf "%s\n" "#define BROKEN_SETVBUF 1" >>confdefs.h
 
 	;;
 esac
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking compiler and flags for sanity" >&5
 printf %s "checking compiler and flags for sanity... " >&6; }
 if test "$cross_compiling" = yes
 then :
   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking compiler sanity" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking compiler sanity" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdlib.h>
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		as_fn_error $? "*** compiler cannot create working executables, check config.log ***" "$LINENO" 5
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 # Checks for libraries.
 ac_fn_c_check_func "$LINENO" "setsockopt" "ac_cv_func_setsockopt"
 if test "x$ac_cv_func_setsockopt" = xyes
 then :
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for setsockopt in -lsocket" >&5
 printf %s "checking for setsockopt in -lsocket... " >&6; }
 if test ${ac_cv_lib_socket_setsockopt+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lsocket  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char setsockopt ();
 int
 main (void)
 {
 return setsockopt ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_socket_setsockopt=yes
 else $as_nop
   ac_cv_lib_socket_setsockopt=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_socket_setsockopt" >&5
 printf "%s\n" "$ac_cv_lib_socket_setsockopt" >&6; }
 if test "x$ac_cv_lib_socket_setsockopt" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBSOCKET 1" >>confdefs.h
 
   LIBS="-lsocket $LIBS"
 
 fi
 
 fi
 
 
 
   for ac_func in dirname
 do :
   ac_fn_c_check_func "$LINENO" "dirname" "ac_cv_func_dirname"
 if test "x$ac_cv_func_dirname" = xyes
 then :
   printf "%s\n" "#define HAVE_DIRNAME 1" >>confdefs.h
  ac_fn_c_check_header_compile "$LINENO" "libgen.h" "ac_cv_header_libgen_h" "$ac_includes_default"
 if test "x$ac_cv_header_libgen_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBGEN_H 1" >>confdefs.h
 
 fi
 
 else $as_nop
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dirname in -lgen" >&5
 printf %s "checking for dirname in -lgen... " >&6; }
 if test ${ac_cv_lib_gen_dirname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lgen  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dirname ();
 int
 main (void)
 {
 return dirname ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_gen_dirname=yes
 else $as_nop
   ac_cv_lib_gen_dirname=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gen_dirname" >&5
 printf "%s\n" "$ac_cv_lib_gen_dirname" >&6; }
 if test "x$ac_cv_lib_gen_dirname" = xyes
 then :
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for broken dirname" >&5
 printf %s "checking for broken dirname... " >&6; }
 if test ${ac_cv_have_broken_dirname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 			save_LIBS="$LIBS"
 			LIBS="$LIBS -lgen"
 			if test "$cross_compiling" = yes
 then :
    ac_cv_have_broken_dirname="no"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <libgen.h>
 #include <string.h>
 #include <stdlib.h>
 
 int main(int argc, char **argv) {
     char *s, buf[32];
 
     strncpy(buf,"/etc", 32);
     s = dirname(buf);
     if (!s || strncmp(s, "/", 32) != 0) {
 	exit(1);
     } else {
 	exit(0);
     }
 }
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    ac_cv_have_broken_dirname="no"
 else $as_nop
    ac_cv_have_broken_dirname="yes"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 			LIBS="$save_LIBS"
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_broken_dirname" >&5
 printf "%s\n" "$ac_cv_have_broken_dirname" >&6; }
 		if test "x$ac_cv_have_broken_dirname" = "xno" ; then
 			LIBS="$LIBS -lgen"
 			printf "%s\n" "#define HAVE_DIRNAME 1" >>confdefs.h
 
 			ac_fn_c_check_header_compile "$LINENO" "libgen.h" "ac_cv_header_libgen_h" "$ac_includes_default"
 if test "x$ac_cv_header_libgen_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBGEN_H 1" >>confdefs.h
 
 fi
 
 		fi
 
 fi
 
 
 fi
 
 done
 
 ac_fn_c_check_func "$LINENO" "getspnam" "ac_cv_func_getspnam"
 if test "x$ac_cv_func_getspnam" = xyes
 then :
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getspnam in -lgen" >&5
 printf %s "checking for getspnam in -lgen... " >&6; }
 if test ${ac_cv_lib_gen_getspnam+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lgen  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char getspnam ();
 int
 main (void)
 {
 return getspnam ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_gen_getspnam=yes
 else $as_nop
   ac_cv_lib_gen_getspnam=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gen_getspnam" >&5
 printf "%s\n" "$ac_cv_lib_gen_getspnam" >&6; }
 if test "x$ac_cv_lib_gen_getspnam" = xyes
 then :
   LIBS="$LIBS -lgen"
 fi
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing basename" >&5
 printf %s "checking for library containing basename... " >&6; }
 if test ${ac_cv_search_basename+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char basename ();
 int
 main (void)
 {
 return basename ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' gen
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_basename=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_basename+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_basename+y}
 then :
 
 else $as_nop
   ac_cv_search_basename=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_basename" >&5
 printf "%s\n" "$ac_cv_search_basename" >&6; }
 ac_res=$ac_cv_search_basename
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 printf "%s\n" "#define HAVE_BASENAME 1" >>confdefs.h
 
 fi
 
 
 zlib=yes
 
 # Check whether --with-zlib was given.
 if test ${with_zlib+y}
 then :
   withval=$with_zlib;  if test "x$withval" = "xno" ; then
 		zlib=no
 	  elif test "x$withval" != "xyes"; then
 		if test -d "$withval/lib"; then
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval}/lib ${LDFLAGS}"
 			fi
 		else
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval} ${rpath_opt}${withval} ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval} ${LDFLAGS}"
 			fi
 		fi
 		if test -d "$withval/include"; then
 			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
 		else
 			CPPFLAGS="-I${withval} ${CPPFLAGS}"
 		fi
 	fi
 
 fi
 
 
 # These libraries are needed for anything that links in the channel code.
 CHANNELLIBS=""
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for zlib" >&5
 printf %s "checking for zlib... " >&6; }
 if test "x${zlib}" = "xno"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 else
     saved_LIBS="$LIBS"
     CHANNELLIBS="$CHANNELLIBS -lz"
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define WITH_ZLIB 1" >>confdefs.h
 
     ac_fn_c_check_header_compile "$LINENO" "zlib.h" "ac_cv_header_zlib_h" "$ac_includes_default"
 if test "x$ac_cv_header_zlib_h" = xyes
 then :
 
 else $as_nop
   as_fn_error $? "*** zlib.h missing - please install first or check config.log ***" "$LINENO" 5
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for deflate in -lz" >&5
 printf %s "checking for deflate in -lz... " >&6; }
 if test ${ac_cv_lib_z_deflate+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lz  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char deflate ();
 int
 main (void)
 {
 return deflate ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_z_deflate=yes
 else $as_nop
   ac_cv_lib_z_deflate=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_deflate" >&5
 printf "%s\n" "$ac_cv_lib_z_deflate" >&6; }
 if test "x$ac_cv_lib_z_deflate" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBZ 1" >>confdefs.h
 
   LIBS="-lz $LIBS"
 
 else $as_nop
 
 		saved_CPPFLAGS="$CPPFLAGS"
 		saved_LDFLAGS="$LDFLAGS"
 				if test -n "${rpath_opt}"; then
 			LDFLAGS="-L/usr/local/lib ${rpath_opt}/usr/local/lib ${saved_LDFLAGS}"
 		else
 			LDFLAGS="-L/usr/local/lib ${saved_LDFLAGS}"
 		fi
 		CPPFLAGS="-I/usr/local/include ${saved_CPPFLAGS}"
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char deflate ();
 int
 main (void)
 {
 return deflate ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   printf "%s\n" "#define HAVE_LIBZ 1" >>confdefs.h
 
 else $as_nop
 
 				as_fn_error $? "*** zlib missing - please install first or check config.log ***" "$LINENO" 5
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 
 fi
 
 
 
 # Check whether --with-zlib-version-check was given.
 if test ${with_zlib_version_check+y}
 then :
   withval=$with_zlib_version_check;   if test "x$withval" = "xno" ; then
 		zlib_check_nonfatal=1
 	   fi
 
 
 fi
 
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for possibly buggy zlib" >&5
 printf %s "checking for possibly buggy zlib... " >&6; }
     if test "$cross_compiling" = yes
 then :
   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking zlib version" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking zlib version" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <zlib.h>
 
 int
 main (void)
 {
 
 	int a=0, b=0, c=0, d=0, n, v;
 	n = sscanf(ZLIB_VERSION, "%d.%d.%d.%d", &a, &b, &c, &d);
 	if (n < 1)
 		exit(1);
 	v = a*1000000 + b*10000 + c*100 + d;
 	fprintf(stderr, "found zlib version %s (%d)\n", ZLIB_VERSION, v);
 
 	/* 1.1.4 is OK */
 	if (a == 1 && b == 1 && c >= 4)
 		exit(0);
 
 	/* 1.2.3 and up are OK */
 	if (v >= 1020300)
 		exit(0);
 
 	exit(2);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 	  if test -z "$zlib_check_nonfatal" ; then
 		as_fn_error $? "*** zlib too old - check config.log ***
 Your reported zlib version has known security problems.  It's possible your
 vendor has fixed these problems without changing the version number.  If you
 are sure this is the case, you can disable the check by running
 \"./configure --without-zlib-version-check\".
 If you are in doubt, upgrade zlib to version 1.2.3 or greater.
 See http://www.gzip.org/zlib/ for details." "$LINENO" 5
 	  else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: zlib version may have security problems" >&5
 printf "%s\n" "$as_me: WARNING: zlib version may have security problems" >&2;}
 	  fi
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
     LIBS="$saved_LIBS"
 fi
 
 ac_fn_c_check_func "$LINENO" "strcasecmp" "ac_cv_func_strcasecmp"
 if test "x$ac_cv_func_strcasecmp" = xyes
 then :
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for strcasecmp in -lresolv" >&5
 printf %s "checking for strcasecmp in -lresolv... " >&6; }
 if test ${ac_cv_lib_resolv_strcasecmp+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lresolv  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char strcasecmp ();
 int
 main (void)
 {
 return strcasecmp ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_resolv_strcasecmp=yes
 else $as_nop
   ac_cv_lib_resolv_strcasecmp=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_resolv_strcasecmp" >&5
 printf "%s\n" "$ac_cv_lib_resolv_strcasecmp" >&6; }
 if test "x$ac_cv_lib_resolv_strcasecmp" = xyes
 then :
   LIBS="$LIBS -lresolv"
 fi
 
 
 fi
 
 
   for ac_func in utimes
 do :
   ac_fn_c_check_func "$LINENO" "utimes" "ac_cv_func_utimes"
 if test "x$ac_cv_func_utimes" = xyes
 then :
   printf "%s\n" "#define HAVE_UTIMES 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for utimes in -lc89" >&5
 printf %s "checking for utimes in -lc89... " >&6; }
 if test ${ac_cv_lib_c89_utimes+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lc89  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char utimes ();
 int
 main (void)
 {
 return utimes ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_c89_utimes=yes
 else $as_nop
   ac_cv_lib_c89_utimes=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c89_utimes" >&5
 printf "%s\n" "$ac_cv_lib_c89_utimes" >&6; }
 if test "x$ac_cv_lib_c89_utimes" = xyes
 then :
   printf "%s\n" "#define HAVE_UTIMES 1" >>confdefs.h
 
 					LIBS="$LIBS -lc89"
 fi
 
 
 fi
 
 done
 
 ac_fn_c_check_header_compile "$LINENO" "bsd/libutil.h" "ac_cv_header_bsd_libutil_h" "$ac_includes_default"
 if test "x$ac_cv_header_bsd_libutil_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BSD_LIBUTIL_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "libutil.h" "ac_cv_header_libutil_h" "$ac_includes_default"
 if test "x$ac_cv_header_libutil_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBUTIL_H 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing fmt_scaled" >&5
 printf %s "checking for library containing fmt_scaled... " >&6; }
 if test ${ac_cv_search_fmt_scaled+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char fmt_scaled ();
 int
 main (void)
 {
 return fmt_scaled ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_fmt_scaled=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_fmt_scaled+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_fmt_scaled+y}
 then :
 
 else $as_nop
   ac_cv_search_fmt_scaled=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_fmt_scaled" >&5
 printf "%s\n" "$ac_cv_search_fmt_scaled" >&6; }
 ac_res=$ac_cv_search_fmt_scaled
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing scan_scaled" >&5
 printf %s "checking for library containing scan_scaled... " >&6; }
 if test ${ac_cv_search_scan_scaled+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char scan_scaled ();
 int
 main (void)
 {
 return scan_scaled ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_scan_scaled=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_scan_scaled+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_scan_scaled+y}
 then :
 
 else $as_nop
   ac_cv_search_scan_scaled=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_scan_scaled" >&5
 printf "%s\n" "$ac_cv_search_scan_scaled" >&6; }
 ac_res=$ac_cv_search_scan_scaled
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing login" >&5
 printf %s "checking for library containing login... " >&6; }
 if test ${ac_cv_search_login+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char login ();
 int
 main (void)
 {
 return login ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_login=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_login+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_login+y}
 then :
 
 else $as_nop
   ac_cv_search_login=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_login" >&5
 printf "%s\n" "$ac_cv_search_login" >&6; }
 ac_res=$ac_cv_search_login
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing logout" >&5
 printf %s "checking for library containing logout... " >&6; }
 if test ${ac_cv_search_logout+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char logout ();
 int
 main (void)
 {
 return logout ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_logout=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_logout+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_logout+y}
 then :
 
 else $as_nop
   ac_cv_search_logout=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_logout" >&5
 printf "%s\n" "$ac_cv_search_logout" >&6; }
 ac_res=$ac_cv_search_logout
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing logwtmp" >&5
 printf %s "checking for library containing logwtmp... " >&6; }
 if test ${ac_cv_search_logwtmp+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char logwtmp ();
 int
 main (void)
 {
 return logwtmp ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_logwtmp=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_logwtmp+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_logwtmp+y}
 then :
 
 else $as_nop
   ac_cv_search_logwtmp=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_logwtmp" >&5
 printf "%s\n" "$ac_cv_search_logwtmp" >&6; }
 ac_res=$ac_cv_search_logwtmp
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing openpty" >&5
 printf %s "checking for library containing openpty... " >&6; }
 if test ${ac_cv_search_openpty+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char openpty ();
 int
 main (void)
 {
 return openpty ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_openpty=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_openpty+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_openpty+y}
 then :
 
 else $as_nop
   ac_cv_search_openpty=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_openpty" >&5
 printf "%s\n" "$ac_cv_search_openpty" >&6; }
 ac_res=$ac_cv_search_openpty
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing updwtmp" >&5
 printf %s "checking for library containing updwtmp... " >&6; }
 if test ${ac_cv_search_updwtmp+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char updwtmp ();
 int
 main (void)
 {
 return updwtmp ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' util bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_updwtmp=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_updwtmp+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_updwtmp+y}
 then :
 
 else $as_nop
   ac_cv_search_updwtmp=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_updwtmp" >&5
 printf "%s\n" "$ac_cv_search_updwtmp" >&6; }
 ac_res=$ac_cv_search_updwtmp
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 ac_fn_c_check_func "$LINENO" "fmt_scaled" "ac_cv_func_fmt_scaled"
 if test "x$ac_cv_func_fmt_scaled" = xyes
 then :
   printf "%s\n" "#define HAVE_FMT_SCALED 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "scan_scaled" "ac_cv_func_scan_scaled"
 if test "x$ac_cv_func_scan_scaled" = xyes
 then :
   printf "%s\n" "#define HAVE_SCAN_SCALED 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "login" "ac_cv_func_login"
 if test "x$ac_cv_func_login" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGIN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "logout" "ac_cv_func_logout"
 if test "x$ac_cv_func_logout" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGOUT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "openpty" "ac_cv_func_openpty"
 if test "x$ac_cv_func_openpty" = xyes
 then :
   printf "%s\n" "#define HAVE_OPENPTY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "updwtmp" "ac_cv_func_updwtmp"
 if test "x$ac_cv_func_updwtmp" = xyes
 then :
   printf "%s\n" "#define HAVE_UPDWTMP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "logwtmp" "ac_cv_func_logwtmp"
 if test "x$ac_cv_func_logwtmp" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGWTMP 1" >>confdefs.h
 
 fi
 
 
 # On some platforms, inet_ntop and gethostbyname may be found in libresolv
 # or libnsl.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing inet_ntop" >&5
 printf %s "checking for library containing inet_ntop... " >&6; }
 if test ${ac_cv_search_inet_ntop+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char inet_ntop ();
 int
 main (void)
 {
 return inet_ntop ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv nsl
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_inet_ntop=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_inet_ntop+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_inet_ntop+y}
 then :
 
 else $as_nop
   ac_cv_search_inet_ntop=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_ntop" >&5
 printf "%s\n" "$ac_cv_search_inet_ntop" >&6; }
 ac_res=$ac_cv_search_inet_ntop
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing gethostbyname" >&5
 printf %s "checking for library containing gethostbyname... " >&6; }
 if test ${ac_cv_search_gethostbyname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char gethostbyname ();
 int
 main (void)
 {
 return gethostbyname ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv nsl
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_gethostbyname=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_gethostbyname+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_gethostbyname+y}
 then :
 
 else $as_nop
   ac_cv_search_gethostbyname=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_gethostbyname" >&5
 printf "%s\n" "$ac_cv_search_gethostbyname" >&6; }
 ac_res=$ac_cv_search_gethostbyname
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 # Some Linux distribtions ship the BSD libc hashing functions in
 # separate libraries.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing SHA256Update" >&5
 printf %s "checking for library containing SHA256Update... " >&6; }
 if test ${ac_cv_search_SHA256Update+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char SHA256Update ();
 int
 main (void)
 {
 return SHA256Update ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' md bsd
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_SHA256Update=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_SHA256Update+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_SHA256Update+y}
 then :
 
 else $as_nop
   ac_cv_search_SHA256Update=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_SHA256Update" >&5
 printf "%s\n" "$ac_cv_search_SHA256Update" >&6; }
 ac_res=$ac_cv_search_SHA256Update
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 # "Particular Function Checks"
 # see https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Particular-Functions.html
 
   for ac_func in strftime
 do :
   ac_fn_c_check_func "$LINENO" "strftime" "ac_cv_func_strftime"
 if test "x$ac_cv_func_strftime" = xyes
 then :
   printf "%s\n" "#define HAVE_STRFTIME 1" >>confdefs.h
 
 else $as_nop
   # strftime is in -lintl on SCO UNIX.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for strftime in -lintl" >&5
 printf %s "checking for strftime in -lintl... " >&6; }
 if test ${ac_cv_lib_intl_strftime+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lintl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char strftime ();
 int
 main (void)
 {
 return strftime ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_intl_strftime=yes
 else $as_nop
   ac_cv_lib_intl_strftime=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_intl_strftime" >&5
 printf "%s\n" "$ac_cv_lib_intl_strftime" >&6; }
 if test "x$ac_cv_lib_intl_strftime" = xyes
 then :
   printf "%s\n" "#define HAVE_STRFTIME 1" >>confdefs.h
 
 LIBS="-lintl $LIBS"
 fi
 
 fi
 
 done
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU libc compatible malloc" >&5
 printf %s "checking for GNU libc compatible malloc... " >&6; }
 if test ${ac_cv_func_malloc_0_nonnull+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in # ((
 		  # Guess yes on platforms where we know the result.
 		  *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
 		  | hpux* | solaris* | cygwin* | mingw* | msys* )
 		    ac_cv_func_malloc_0_nonnull=yes ;;
 		  # If we don't know, assume the worst.
 		  *) ac_cv_func_malloc_0_nonnull=no ;;
 		esac
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 
 int
 main (void)
 {
 void *p = malloc (0);
 		   int result = !p;
 		   free (p);
 		   return result;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   ac_cv_func_malloc_0_nonnull=yes
 else $as_nop
   ac_cv_func_malloc_0_nonnull=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_malloc_0_nonnull" >&5
 printf "%s\n" "$ac_cv_func_malloc_0_nonnull" >&6; }
 if test $ac_cv_func_malloc_0_nonnull = yes
 then :
 
 printf "%s\n" "#define HAVE_MALLOC 1" >>confdefs.h
 
 else $as_nop
   printf "%s\n" "#define HAVE_MALLOC 0" >>confdefs.h
 
    case " $LIBOBJS " in
   *" malloc.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS malloc.$ac_objext"
  ;;
 esac
 
 
 printf "%s\n" "#define malloc rpl_malloc" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU libc compatible realloc" >&5
 printf %s "checking for GNU libc compatible realloc... " >&6; }
 if test ${ac_cv_func_realloc_0_nonnull+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in # ((
 		  # Guess yes on platforms where we know the result.
 		  *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
 		  | hpux* | solaris* | cygwin* | mingw* | msys* )
 		    ac_cv_func_realloc_0_nonnull=yes ;;
 		  # If we don't know, assume the worst.
 		  *) ac_cv_func_realloc_0_nonnull=no ;;
 		esac
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 
 int
 main (void)
 {
 void *p = realloc (0, 0);
 		   int result = !p;
 		   free (p);
 		   return result;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   ac_cv_func_realloc_0_nonnull=yes
 else $as_nop
   ac_cv_func_realloc_0_nonnull=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_realloc_0_nonnull" >&5
 printf "%s\n" "$ac_cv_func_realloc_0_nonnull" >&6; }
 if test $ac_cv_func_realloc_0_nonnull = yes
 then :
 
 printf "%s\n" "#define HAVE_REALLOC 1" >>confdefs.h
 
 else $as_nop
   printf "%s\n" "#define HAVE_REALLOC 0" >>confdefs.h
 
    case " $LIBOBJS " in
   *" realloc.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS realloc.$ac_objext"
  ;;
 esac
 
 
 printf "%s\n" "#define realloc rpl_realloc" >>confdefs.h
 
 fi
 
 
 # autoconf doesn't have AC_FUNC_CALLOC so fake it if malloc returns NULL;
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if calloc(0, N) returns non-null" >&5
 printf %s "checking if calloc(0, N) returns non-null... " >&6; }
 if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming same as malloc" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming same as malloc" >&2;}
 	  func_calloc_0_nonnull="$ac_cv_func_malloc_0_nonnull"
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdlib.h>
 int
 main (void)
 {
  void *p = calloc(0, 1); exit(p == NULL);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    func_calloc_0_nonnull=yes
 else $as_nop
    func_calloc_0_nonnull=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $func_calloc_0_nonnull" >&5
 printf "%s\n" "$func_calloc_0_nonnull" >&6; }
 
 if test "x$func_calloc_0_nonnull" = "xyes"; then
 
 printf "%s\n" "#define HAVE_CALLOC 1" >>confdefs.h
 
 else
 
 printf "%s\n" "#define HAVE_CALLOC 0" >>confdefs.h
 
 
 printf "%s\n" "#define calloc rpl_calloc" >>confdefs.h
 
 fi
 
 # Check for ALTDIRFUNC glob() extension
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GLOB_ALTDIRFUNC support" >&5
 printf %s "checking for GLOB_ALTDIRFUNC support... " >&6; }
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 		#include <glob.h>
 		#ifdef GLOB_ALTDIRFUNC
 		FOUNDIT
 		#endif
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "FOUNDIT" >/dev/null 2>&1
 then :
 
 
 printf "%s\n" "#define GLOB_HAS_ALTDIRFUNC 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 
 fi
 rm -rf conftest*
 
 
 # Check for g.gl_matchc glob() extension
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gl_matchc field in glob_t" >&5
 printf %s "checking for gl_matchc field in glob_t... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <glob.h>
 int
 main (void)
 {
  glob_t g; g.gl_matchc = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 
 printf "%s\n" "#define GLOB_HAS_GL_MATCHC 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 # Check for g.gl_statv glob() extension
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gl_statv and GLOB_KEEPSTAT extensions for glob" >&5
 printf %s "checking for gl_statv and GLOB_KEEPSTAT extensions for glob... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <glob.h>
 int
 main (void)
 {
 
 #ifndef GLOB_KEEPSTAT
 #error "glob does not support GLOB_KEEPSTAT extension"
 #endif
 glob_t g;
 g.gl_statv = NULL;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 
 printf "%s\n" "#define GLOB_HAS_GL_STATV 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 ac_fn_check_decl "$LINENO" "GLOB_NOMATCH" "ac_cv_have_decl_GLOB_NOMATCH" "#include <glob.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_GLOB_NOMATCH" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_GLOB_NOMATCH $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "VIS_ALL" "ac_cv_have_decl_VIS_ALL" "#include <vis.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_VIS_ALL" = xyes
 then :
 
 else $as_nop
 
 printf "%s\n" "#define BROKEN_STRNVIS 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether struct dirent allocates space for d_name" >&5
 printf %s "checking whether struct dirent allocates space for d_name... " >&6; }
 if test "$cross_compiling" = yes
 then :
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming BROKEN_ONE_BYTE_DIRENT_D_NAME" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming BROKEN_ONE_BYTE_DIRENT_D_NAME" >&2;}
 		printf "%s\n" "#define BROKEN_ONE_BYTE_DIRENT_D_NAME 1" >>confdefs.h
 
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <dirent.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	struct dirent d;
 	exit(sizeof(d.d_name)<=sizeof(char));
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define BROKEN_ONE_BYTE_DIRENT_D_NAME 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for /proc/pid/fd directory" >&5
 printf %s "checking for /proc/pid/fd directory... " >&6; }
 if test -d "/proc/$$/fd" ; then
 
 printf "%s\n" "#define HAVE_PROC_PID 1" >>confdefs.h
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 # Check whether user wants to use ldns
 LDNS_MSG="no"
 
 # Check whether --with-ldns was given.
 if test ${with_ldns+y}
 then :
   withval=$with_ldns;
 	ldns=""
 	if test "x$withval" = "xyes" ; then
 		if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ldns-config", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ldns-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_LDNSCONFIG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $LDNSCONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_LDNSCONFIG="$LDNSCONFIG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_LDNSCONFIG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 LDNSCONFIG=$ac_cv_path_LDNSCONFIG
 if test -n "$LDNSCONFIG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LDNSCONFIG" >&5
 printf "%s\n" "$LDNSCONFIG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 fi
 if test -z "$ac_cv_path_LDNSCONFIG"; then
   ac_pt_LDNSCONFIG=$LDNSCONFIG
   # Extract the first word of "ldns-config", so it can be a program name with args.
 set dummy ldns-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_ac_pt_LDNSCONFIG+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $ac_pt_LDNSCONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ac_pt_LDNSCONFIG="$ac_pt_LDNSCONFIG" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_ac_pt_LDNSCONFIG="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 ac_pt_LDNSCONFIG=$ac_cv_path_ac_pt_LDNSCONFIG
 if test -n "$ac_pt_LDNSCONFIG"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_LDNSCONFIG" >&5
 printf "%s\n" "$ac_pt_LDNSCONFIG" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_pt_LDNSCONFIG" = x; then
     LDNSCONFIG="no"
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     LDNSCONFIG=$ac_pt_LDNSCONFIG
   fi
 else
   LDNSCONFIG="$ac_cv_path_LDNSCONFIG"
 fi
 
 		if test "x$LDNSCONFIG" = "xno"; then
 			LIBS="-lldns $LIBS"
 			ldns=yes
 		else
 			LIBS="$LIBS `$LDNSCONFIG --libs`"
 			CPPFLAGS="$CPPFLAGS `$LDNSCONFIG --cflags`"
 			ldns=yes
 		fi
 	elif test "x$withval" != "xno" ; then
 			CPPFLAGS="$CPPFLAGS -I${withval}/include"
 			LDFLAGS="$LDFLAGS -L${withval}/lib"
 			LIBS="-lldns $LIBS"
 			ldns=yes
 	fi
 
 	# Verify that it works.
 	if test "x$ldns" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_LDNS 1" >>confdefs.h
 
 		LDNS_MSG="yes"
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ldns support" >&5
 printf %s "checking for ldns support... " >&6; }
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <ldns/ldns.h>
 int main(void) { ldns_status status = ldns_verify_trusted(NULL, NULL, NULL, NULL); status=LDNS_STATUS_OK; exit(0); }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 					as_fn_error $? "** Incomplete or missing ldns libraries." "$LINENO" 5
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 	fi
 
 fi
 
 
 # Check whether user wants libedit support
 LIBEDIT_MSG="no"
 
 # Check whether --with-libedit was given.
 if test ${with_libedit+y}
 then :
   withval=$with_libedit;  if test "x$withval" != "xno" ; then
 		if test "x$withval" = "xyes" ; then
 			if test "x$PKGCONFIG" != "xno"; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $PKGCONFIG knows about libedit" >&5
 printf %s "checking if $PKGCONFIG knows about libedit... " >&6; }
 				if "$PKGCONFIG" libedit; then
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 					use_pkgconfig_for_libedit=yes
 				else
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 				fi
 			fi
 		else
 			CPPFLAGS="$CPPFLAGS -I${withval}/include"
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval}/lib ${LDFLAGS}"
 			fi
 		fi
 		if test "x$use_pkgconfig_for_libedit" = "xyes"; then
 			LIBEDIT=`$PKGCONFIG --libs libedit`
 			CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libedit`"
 		else
 			LIBEDIT="-ledit -lcurses"
 		fi
 		OTHERLIBS=`echo $LIBEDIT | sed 's/-ledit//'`
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for el_init in -ledit" >&5
 printf %s "checking for el_init in -ledit... " >&6; }
 if test ${ac_cv_lib_edit_el_init+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ledit  $OTHERLIBS
 		 $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char el_init ();
 int
 main (void)
 {
 return el_init ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_edit_el_init=yes
 else $as_nop
   ac_cv_lib_edit_el_init=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_edit_el_init" >&5
 printf "%s\n" "$ac_cv_lib_edit_el_init" >&6; }
 if test "x$ac_cv_lib_edit_el_init" = xyes
 then :
 
 printf "%s\n" "#define USE_LIBEDIT 1" >>confdefs.h
 
 			  LIBEDIT_MSG="yes"
 
 
 else $as_nop
    as_fn_error $? "libedit not found" "$LINENO" 5
 fi
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libedit version is compatible" >&5
 printf %s "checking if libedit version is compatible... " >&6; }
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <histedit.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	int i = H_SETSIZE;
 	el_init("", NULL, NULL, NULL);
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		      as_fn_error $? "libedit version is not compatible" "$LINENO" 5
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 	fi
 
 fi
 
 
 AUDIT_MODULE=none
 
 # Check whether --with-audit was given.
 if test ${with_audit+y}
 then :
   withval=$with_audit;
 	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for supported audit module" >&5
 printf %s "checking for supported audit module... " >&6; }
 	  case "$withval" in
 	  bsm)
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: bsm" >&5
 printf "%s\n" "bsm" >&6; }
 		AUDIT_MODULE=bsm
 				       for ac_header in bsm/audit.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "bsm/audit.h" "ac_cv_header_bsm_audit_h" "
 #ifdef HAVE_TIME_H
 # include <time.h>
 #endif
 
 
 "
 if test "x$ac_cv_header_bsm_audit_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BSM_AUDIT_H 1" >>confdefs.h
 
 else $as_nop
   as_fn_error $? "BSM enabled and bsm/audit.h not found" "$LINENO" 5
 fi
 
 done
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getaudit in -lbsm" >&5
 printf %s "checking for getaudit in -lbsm... " >&6; }
 if test ${ac_cv_lib_bsm_getaudit+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lbsm  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char getaudit ();
 int
 main (void)
 {
 return getaudit ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_bsm_getaudit=yes
 else $as_nop
   ac_cv_lib_bsm_getaudit=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bsm_getaudit" >&5
 printf "%s\n" "$ac_cv_lib_bsm_getaudit" >&6; }
 if test "x$ac_cv_lib_bsm_getaudit" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBBSM 1" >>confdefs.h
 
   LIBS="-lbsm $LIBS"
 
 else $as_nop
   as_fn_error $? "BSM enabled and required library not found" "$LINENO" 5
 fi
 
 
   for ac_func in getaudit
 do :
   ac_fn_c_check_func "$LINENO" "getaudit" "ac_cv_func_getaudit"
 if test "x$ac_cv_func_getaudit" = xyes
 then :
   printf "%s\n" "#define HAVE_GETAUDIT 1" >>confdefs.h
 
 else $as_nop
   as_fn_error $? "BSM enabled and required function not found" "$LINENO" 5
 fi
 
 done
 		# These are optional
 		ac_fn_c_check_func "$LINENO" "getaudit_addr" "ac_cv_func_getaudit_addr"
 if test "x$ac_cv_func_getaudit_addr" = xyes
 then :
   printf "%s\n" "#define HAVE_GETAUDIT_ADDR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "aug_get_machine" "ac_cv_func_aug_get_machine"
 if test "x$ac_cv_func_aug_get_machine" = xyes
 then :
   printf "%s\n" "#define HAVE_AUG_GET_MACHINE 1" >>confdefs.h
 
 fi
 
 
 printf "%s\n" "#define USE_BSM_AUDIT 1" >>confdefs.h
 
 		if test "$sol2ver" -ge 11; then
 			SSHDLIBS="$SSHDLIBS -lscf"
 
 printf "%s\n" "#define BROKEN_BSM_API 1" >>confdefs.h
 
 		fi
 		;;
 	  linux)
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: linux" >&5
 printf "%s\n" "linux" >&6; }
 		AUDIT_MODULE=linux
 				ac_fn_c_check_header_compile "$LINENO" "libaudit.h" "ac_cv_header_libaudit_h" "$ac_includes_default"
 if test "x$ac_cv_header_libaudit_h" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBAUDIT_H 1" >>confdefs.h
 
 fi
 
 		SSHDLIBS="$SSHDLIBS -laudit"
 
 printf "%s\n" "#define USE_LINUX_AUDIT 1" >>confdefs.h
 
 		;;
 	  debug)
 		AUDIT_MODULE=debug
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: debug" >&5
 printf "%s\n" "debug" >&6; }
 
 printf "%s\n" "#define SSH_AUDIT_EVENTS 1" >>confdefs.h
 
 		;;
 	  no)
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		;;
 	  *)
 		as_fn_error $? "Unknown audit module $withval" "$LINENO" 5
 		;;
 	esac
 
 fi
 
 
 
 # Check whether --with-pie was given.
 if test ${with_pie+y}
 then :
   withval=$with_pie;
 	if test "x$withval" = "xno"; then
 		use_pie=no
 	fi
 	if test "x$withval" = "xyes"; then
 		use_pie=yes
 	fi
 
 
 fi
 
 if test "x$use_pie" = "x"; then
 	use_pie=no
 fi
 if test "x$use_toolchain_hardening" != "x1" && test "x$use_pie" = "xauto"; then
 	# Turn off automatic PIE when toolchain hardening is off.
 	use_pie=no
 fi
 if test "x$use_pie" = "xauto"; then
 	# Automatic PIE requires gcc >= 4.x
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gcc >= 4.x" >&5
 printf %s "checking for gcc >= 4.x... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #if !defined(__GNUC__) || __GNUC__ < 4
 #error gcc is too old
 #endif
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	  use_pie=no
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 if test "x$use_pie" != "xno"; then
 	SAVED_CFLAGS="$CFLAGS"
 	SAVED_LDFLAGS="$LDFLAGS"
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports compile flag -fPIE" >&5
 printf %s "checking if $CC supports compile flag -fPIE... " >&6; }
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR -fPIE"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-fPIE"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$saved_CFLAGS"
 else
 				if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  CFLAGS="$saved_CFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  CFLAGS="$saved_CFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  CFLAGS="$saved_CFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 }
 	{
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $LD supports link flag -pie" >&5
 printf %s "checking if $LD supports link flag -pie... " >&6; }
 	saved_LDFLAGS="$LDFLAGS"
 	LDFLAGS="$LDFLAGS $WERROR -pie"
 	_define_flag=""
 	test "x$_define_flag" = "x" && _define_flag="-pie"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 else
 		  		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  LDFLAGS="$saved_LDFLAGS $_define_flag"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, fails at run time" >&5
 printf "%s\n" "no, fails at run time" >&6; }
 			  LDFLAGS="$saved_LDFLAGS"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		  LDFLAGS="$saved_LDFLAGS"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 }
 	# We use both -fPIE and -pie or neither.
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether both -fPIE and -pie are supported" >&5
 printf %s "checking whether both -fPIE and -pie are supported... " >&6; }
 	if echo "x $CFLAGS"  | grep ' -fPIE' >/dev/null 2>&1 && \
 	   echo "x $LDFLAGS" | grep ' -pie'  >/dev/null 2>&1 ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		CFLAGS="$SAVED_CFLAGS"
 		LDFLAGS="$SAVED_LDFLAGS"
 	fi
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -fPIC is accepted" >&5
 printf %s "checking whether -fPIC is accepted... " >&6; }
 SAVED_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fPIC"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdlib.h>
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
     PICFLAG="-fPIC";
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
     PICFLAG="";
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 CFLAGS="$SAVED_CFLAGS"
 
 
 ac_fn_c_check_func "$LINENO" "Blowfish_initstate" "ac_cv_func_Blowfish_initstate"
 if test "x$ac_cv_func_Blowfish_initstate" = xyes
 then :
   printf "%s\n" "#define HAVE_BLOWFISH_INITSTATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "Blowfish_expandstate" "ac_cv_func_Blowfish_expandstate"
 if test "x$ac_cv_func_Blowfish_expandstate" = xyes
 then :
   printf "%s\n" "#define HAVE_BLOWFISH_EXPANDSTATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "Blowfish_expand0state" "ac_cv_func_Blowfish_expand0state"
 if test "x$ac_cv_func_Blowfish_expand0state" = xyes
 then :
   printf "%s\n" "#define HAVE_BLOWFISH_EXPAND0STATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "Blowfish_stream2word" "ac_cv_func_Blowfish_stream2word"
 if test "x$ac_cv_func_Blowfish_stream2word" = xyes
 then :
   printf "%s\n" "#define HAVE_BLOWFISH_STREAM2WORD 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "SHA256Update" "ac_cv_func_SHA256Update"
 if test "x$ac_cv_func_SHA256Update" = xyes
 then :
   printf "%s\n" "#define HAVE_SHA256UPDATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "SHA384Update" "ac_cv_func_SHA384Update"
 if test "x$ac_cv_func_SHA384Update" = xyes
 then :
   printf "%s\n" "#define HAVE_SHA384UPDATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "SHA512Update" "ac_cv_func_SHA512Update"
 if test "x$ac_cv_func_SHA512Update" = xyes
 then :
   printf "%s\n" "#define HAVE_SHA512UPDATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "asprintf" "ac_cv_func_asprintf"
 if test "x$ac_cv_func_asprintf" = xyes
 then :
   printf "%s\n" "#define HAVE_ASPRINTF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "b64_ntop" "ac_cv_func_b64_ntop"
 if test "x$ac_cv_func_b64_ntop" = xyes
 then :
   printf "%s\n" "#define HAVE_B64_NTOP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "__b64_ntop" "ac_cv_func___b64_ntop"
 if test "x$ac_cv_func___b64_ntop" = xyes
 then :
   printf "%s\n" "#define HAVE___B64_NTOP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "b64_pton" "ac_cv_func_b64_pton"
 if test "x$ac_cv_func_b64_pton" = xyes
 then :
   printf "%s\n" "#define HAVE_B64_PTON 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "__b64_pton" "ac_cv_func___b64_pton"
 if test "x$ac_cv_func___b64_pton" = xyes
 then :
   printf "%s\n" "#define HAVE___B64_PTON 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "bcopy" "ac_cv_func_bcopy"
 if test "x$ac_cv_func_bcopy" = xyes
 then :
   printf "%s\n" "#define HAVE_BCOPY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "bcrypt_pbkdf" "ac_cv_func_bcrypt_pbkdf"
 if test "x$ac_cv_func_bcrypt_pbkdf" = xyes
 then :
   printf "%s\n" "#define HAVE_BCRYPT_PBKDF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "bindresvport_sa" "ac_cv_func_bindresvport_sa"
 if test "x$ac_cv_func_bindresvport_sa" = xyes
 then :
   printf "%s\n" "#define HAVE_BINDRESVPORT_SA 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "blf_enc" "ac_cv_func_blf_enc"
 if test "x$ac_cv_func_blf_enc" = xyes
 then :
   printf "%s\n" "#define HAVE_BLF_ENC 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "bzero" "ac_cv_func_bzero"
 if test "x$ac_cv_func_bzero" = xyes
 then :
   printf "%s\n" "#define HAVE_BZERO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "cap_rights_limit" "ac_cv_func_cap_rights_limit"
 if test "x$ac_cv_func_cap_rights_limit" = xyes
 then :
   printf "%s\n" "#define HAVE_CAP_RIGHTS_LIMIT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "clock" "ac_cv_func_clock"
 if test "x$ac_cv_func_clock" = xyes
 then :
   printf "%s\n" "#define HAVE_CLOCK 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "closefrom" "ac_cv_func_closefrom"
 if test "x$ac_cv_func_closefrom" = xyes
 then :
   printf "%s\n" "#define HAVE_CLOSEFROM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "close_range" "ac_cv_func_close_range"
 if test "x$ac_cv_func_close_range" = xyes
 then :
   printf "%s\n" "#define HAVE_CLOSE_RANGE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "dirfd" "ac_cv_func_dirfd"
 if test "x$ac_cv_func_dirfd" = xyes
 then :
   printf "%s\n" "#define HAVE_DIRFD 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "endgrent" "ac_cv_func_endgrent"
 if test "x$ac_cv_func_endgrent" = xyes
 then :
   printf "%s\n" "#define HAVE_ENDGRENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "err" "ac_cv_func_err"
 if test "x$ac_cv_func_err" = xyes
 then :
   printf "%s\n" "#define HAVE_ERR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "errx" "ac_cv_func_errx"
 if test "x$ac_cv_func_errx" = xyes
 then :
   printf "%s\n" "#define HAVE_ERRX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "explicit_bzero" "ac_cv_func_explicit_bzero"
 if test "x$ac_cv_func_explicit_bzero" = xyes
 then :
   printf "%s\n" "#define HAVE_EXPLICIT_BZERO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "explicit_memset" "ac_cv_func_explicit_memset"
 if test "x$ac_cv_func_explicit_memset" = xyes
 then :
   printf "%s\n" "#define HAVE_EXPLICIT_MEMSET 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fchmod" "ac_cv_func_fchmod"
 if test "x$ac_cv_func_fchmod" = xyes
 then :
   printf "%s\n" "#define HAVE_FCHMOD 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fchmodat" "ac_cv_func_fchmodat"
 if test "x$ac_cv_func_fchmodat" = xyes
 then :
   printf "%s\n" "#define HAVE_FCHMODAT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fchown" "ac_cv_func_fchown"
 if test "x$ac_cv_func_fchown" = xyes
 then :
   printf "%s\n" "#define HAVE_FCHOWN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fchownat" "ac_cv_func_fchownat"
 if test "x$ac_cv_func_fchownat" = xyes
 then :
   printf "%s\n" "#define HAVE_FCHOWNAT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "flock" "ac_cv_func_flock"
 if test "x$ac_cv_func_flock" = xyes
 then :
   printf "%s\n" "#define HAVE_FLOCK 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fnmatch" "ac_cv_func_fnmatch"
 if test "x$ac_cv_func_fnmatch" = xyes
 then :
   printf "%s\n" "#define HAVE_FNMATCH 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "freeaddrinfo" "ac_cv_func_freeaddrinfo"
 if test "x$ac_cv_func_freeaddrinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_FREEADDRINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "freezero" "ac_cv_func_freezero"
 if test "x$ac_cv_func_freezero" = xyes
 then :
   printf "%s\n" "#define HAVE_FREEZERO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fstatfs" "ac_cv_func_fstatfs"
 if test "x$ac_cv_func_fstatfs" = xyes
 then :
   printf "%s\n" "#define HAVE_FSTATFS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fstatvfs" "ac_cv_func_fstatvfs"
 if test "x$ac_cv_func_fstatvfs" = xyes
 then :
   printf "%s\n" "#define HAVE_FSTATVFS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "futimes" "ac_cv_func_futimes"
 if test "x$ac_cv_func_futimes" = xyes
 then :
   printf "%s\n" "#define HAVE_FUTIMES 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getaddrinfo" "ac_cv_func_getaddrinfo"
 if test "x$ac_cv_func_getaddrinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_GETADDRINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getcwd" "ac_cv_func_getcwd"
 if test "x$ac_cv_func_getcwd" = xyes
 then :
   printf "%s\n" "#define HAVE_GETCWD 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getentropy" "ac_cv_func_getentropy"
 if test "x$ac_cv_func_getentropy" = xyes
 then :
   printf "%s\n" "#define HAVE_GETENTROPY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getgrouplist" "ac_cv_func_getgrouplist"
 if test "x$ac_cv_func_getgrouplist" = xyes
 then :
   printf "%s\n" "#define HAVE_GETGROUPLIST 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
 if test "x$ac_cv_func_getline" = xyes
 then :
   printf "%s\n" "#define HAVE_GETLINE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getnameinfo" "ac_cv_func_getnameinfo"
 if test "x$ac_cv_func_getnameinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_GETNAMEINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getopt" "ac_cv_func_getopt"
 if test "x$ac_cv_func_getopt" = xyes
 then :
   printf "%s\n" "#define HAVE_GETOPT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getpagesize" "ac_cv_func_getpagesize"
 if test "x$ac_cv_func_getpagesize" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPAGESIZE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getpeereid" "ac_cv_func_getpeereid"
 if test "x$ac_cv_func_getpeereid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPEEREID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getpeerucred" "ac_cv_func_getpeerucred"
 if test "x$ac_cv_func_getpeerucred" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPEERUCRED 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getpgid" "ac_cv_func_getpgid"
 if test "x$ac_cv_func_getpgid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPGID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "_getpty" "ac_cv_func__getpty"
 if test "x$ac_cv_func__getpty" = xyes
 then :
   printf "%s\n" "#define HAVE__GETPTY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getrlimit" "ac_cv_func_getrlimit"
 if test "x$ac_cv_func_getrlimit" = xyes
 then :
   printf "%s\n" "#define HAVE_GETRLIMIT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getrandom" "ac_cv_func_getrandom"
 if test "x$ac_cv_func_getrandom" = xyes
 then :
   printf "%s\n" "#define HAVE_GETRANDOM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getsid" "ac_cv_func_getsid"
 if test "x$ac_cv_func_getsid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETSID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getttyent" "ac_cv_func_getttyent"
 if test "x$ac_cv_func_getttyent" = xyes
 then :
   printf "%s\n" "#define HAVE_GETTTYENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "glob" "ac_cv_func_glob"
 if test "x$ac_cv_func_glob" = xyes
 then :
   printf "%s\n" "#define HAVE_GLOB 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "group_from_gid" "ac_cv_func_group_from_gid"
 if test "x$ac_cv_func_group_from_gid" = xyes
 then :
   printf "%s\n" "#define HAVE_GROUP_FROM_GID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "inet_aton" "ac_cv_func_inet_aton"
 if test "x$ac_cv_func_inet_aton" = xyes
 then :
   printf "%s\n" "#define HAVE_INET_ATON 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "inet_ntoa" "ac_cv_func_inet_ntoa"
 if test "x$ac_cv_func_inet_ntoa" = xyes
 then :
   printf "%s\n" "#define HAVE_INET_NTOA 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "inet_ntop" "ac_cv_func_inet_ntop"
 if test "x$ac_cv_func_inet_ntop" = xyes
 then :
   printf "%s\n" "#define HAVE_INET_NTOP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "innetgr" "ac_cv_func_innetgr"
 if test "x$ac_cv_func_innetgr" = xyes
 then :
   printf "%s\n" "#define HAVE_INNETGR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "killpg" "ac_cv_func_killpg"
 if test "x$ac_cv_func_killpg" = xyes
 then :
   printf "%s\n" "#define HAVE_KILLPG 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "llabs" "ac_cv_func_llabs"
 if test "x$ac_cv_func_llabs" = xyes
 then :
   printf "%s\n" "#define HAVE_LLABS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "localtime_r" "ac_cv_func_localtime_r"
 if test "x$ac_cv_func_localtime_r" = xyes
 then :
   printf "%s\n" "#define HAVE_LOCALTIME_R 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "login_getcapbool" "ac_cv_func_login_getcapbool"
 if test "x$ac_cv_func_login_getcapbool" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGIN_GETCAPBOOL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "login_getpwclass" "ac_cv_func_login_getpwclass"
 if test "x$ac_cv_func_login_getpwclass" = xyes
 then :
   printf "%s\n" "#define HAVE_LOGIN_GETPWCLASS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "memmem" "ac_cv_func_memmem"
 if test "x$ac_cv_func_memmem" = xyes
 then :
   printf "%s\n" "#define HAVE_MEMMEM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "memmove" "ac_cv_func_memmove"
 if test "x$ac_cv_func_memmove" = xyes
 then :
   printf "%s\n" "#define HAVE_MEMMOVE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "memset_s" "ac_cv_func_memset_s"
 if test "x$ac_cv_func_memset_s" = xyes
 then :
   printf "%s\n" "#define HAVE_MEMSET_S 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "mkdtemp" "ac_cv_func_mkdtemp"
 if test "x$ac_cv_func_mkdtemp" = xyes
 then :
   printf "%s\n" "#define HAVE_MKDTEMP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "ngetaddrinfo" "ac_cv_func_ngetaddrinfo"
 if test "x$ac_cv_func_ngetaddrinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_NGETADDRINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "nsleep" "ac_cv_func_nsleep"
 if test "x$ac_cv_func_nsleep" = xyes
 then :
   printf "%s\n" "#define HAVE_NSLEEP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "ogetaddrinfo" "ac_cv_func_ogetaddrinfo"
 if test "x$ac_cv_func_ogetaddrinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_OGETADDRINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "openlog_r" "ac_cv_func_openlog_r"
 if test "x$ac_cv_func_openlog_r" = xyes
 then :
   printf "%s\n" "#define HAVE_OPENLOG_R 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "pledge" "ac_cv_func_pledge"
 if test "x$ac_cv_func_pledge" = xyes
 then :
   printf "%s\n" "#define HAVE_PLEDGE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "poll" "ac_cv_func_poll"
 if test "x$ac_cv_func_poll" = xyes
 then :
   printf "%s\n" "#define HAVE_POLL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "ppoll" "ac_cv_func_ppoll"
 if test "x$ac_cv_func_ppoll" = xyes
 then :
   printf "%s\n" "#define HAVE_PPOLL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "prctl" "ac_cv_func_prctl"
 if test "x$ac_cv_func_prctl" = xyes
 then :
   printf "%s\n" "#define HAVE_PRCTL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "procctl" "ac_cv_func_procctl"
 if test "x$ac_cv_func_procctl" = xyes
 then :
   printf "%s\n" "#define HAVE_PROCCTL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "pselect" "ac_cv_func_pselect"
 if test "x$ac_cv_func_pselect" = xyes
 then :
   printf "%s\n" "#define HAVE_PSELECT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "pstat" "ac_cv_func_pstat"
 if test "x$ac_cv_func_pstat" = xyes
 then :
   printf "%s\n" "#define HAVE_PSTAT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "raise" "ac_cv_func_raise"
 if test "x$ac_cv_func_raise" = xyes
 then :
   printf "%s\n" "#define HAVE_RAISE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "readpassphrase" "ac_cv_func_readpassphrase"
 if test "x$ac_cv_func_readpassphrase" = xyes
 then :
   printf "%s\n" "#define HAVE_READPASSPHRASE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "reallocarray" "ac_cv_func_reallocarray"
 if test "x$ac_cv_func_reallocarray" = xyes
 then :
   printf "%s\n" "#define HAVE_REALLOCARRAY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "realpath" "ac_cv_func_realpath"
 if test "x$ac_cv_func_realpath" = xyes
 then :
   printf "%s\n" "#define HAVE_REALPATH 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "recvmsg" "ac_cv_func_recvmsg"
 if test "x$ac_cv_func_recvmsg" = xyes
 then :
   printf "%s\n" "#define HAVE_RECVMSG 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "recallocarray" "ac_cv_func_recallocarray"
 if test "x$ac_cv_func_recallocarray" = xyes
 then :
   printf "%s\n" "#define HAVE_RECALLOCARRAY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "rresvport_af" "ac_cv_func_rresvport_af"
 if test "x$ac_cv_func_rresvport_af" = xyes
 then :
   printf "%s\n" "#define HAVE_RRESVPORT_AF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "sendmsg" "ac_cv_func_sendmsg"
 if test "x$ac_cv_func_sendmsg" = xyes
 then :
   printf "%s\n" "#define HAVE_SENDMSG 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setdtablesize" "ac_cv_func_setdtablesize"
 if test "x$ac_cv_func_setdtablesize" = xyes
 then :
   printf "%s\n" "#define HAVE_SETDTABLESIZE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setegid" "ac_cv_func_setegid"
 if test "x$ac_cv_func_setegid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETEGID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setenv" "ac_cv_func_setenv"
 if test "x$ac_cv_func_setenv" = xyes
 then :
   printf "%s\n" "#define HAVE_SETENV 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "seteuid" "ac_cv_func_seteuid"
 if test "x$ac_cv_func_seteuid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETEUID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setgroupent" "ac_cv_func_setgroupent"
 if test "x$ac_cv_func_setgroupent" = xyes
 then :
   printf "%s\n" "#define HAVE_SETGROUPENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setgroups" "ac_cv_func_setgroups"
 if test "x$ac_cv_func_setgroups" = xyes
 then :
   printf "%s\n" "#define HAVE_SETGROUPS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setlinebuf" "ac_cv_func_setlinebuf"
 if test "x$ac_cv_func_setlinebuf" = xyes
 then :
   printf "%s\n" "#define HAVE_SETLINEBUF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setlogin" "ac_cv_func_setlogin"
 if test "x$ac_cv_func_setlogin" = xyes
 then :
   printf "%s\n" "#define HAVE_SETLOGIN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setpassent" "ac_cv_func_setpassent"
 if test "x$ac_cv_func_setpassent" = xyes
 then :
   printf "%s\n" "#define HAVE_SETPASSENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setpcred" "ac_cv_func_setpcred"
 if test "x$ac_cv_func_setpcred" = xyes
 then :
   printf "%s\n" "#define HAVE_SETPCRED 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setproctitle" "ac_cv_func_setproctitle"
 if test "x$ac_cv_func_setproctitle" = xyes
 then :
   printf "%s\n" "#define HAVE_SETPROCTITLE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setregid" "ac_cv_func_setregid"
 if test "x$ac_cv_func_setregid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETREGID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setreuid" "ac_cv_func_setreuid"
 if test "x$ac_cv_func_setreuid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETREUID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setrlimit" "ac_cv_func_setrlimit"
 if test "x$ac_cv_func_setrlimit" = xyes
 then :
   printf "%s\n" "#define HAVE_SETRLIMIT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setsid" "ac_cv_func_setsid"
 if test "x$ac_cv_func_setsid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETSID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setvbuf" "ac_cv_func_setvbuf"
 if test "x$ac_cv_func_setvbuf" = xyes
 then :
   printf "%s\n" "#define HAVE_SETVBUF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "sigaction" "ac_cv_func_sigaction"
 if test "x$ac_cv_func_sigaction" = xyes
 then :
   printf "%s\n" "#define HAVE_SIGACTION 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "sigvec" "ac_cv_func_sigvec"
 if test "x$ac_cv_func_sigvec" = xyes
 then :
   printf "%s\n" "#define HAVE_SIGVEC 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "snprintf" "ac_cv_func_snprintf"
 if test "x$ac_cv_func_snprintf" = xyes
 then :
   printf "%s\n" "#define HAVE_SNPRINTF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "socketpair" "ac_cv_func_socketpair"
 if test "x$ac_cv_func_socketpair" = xyes
 then :
   printf "%s\n" "#define HAVE_SOCKETPAIR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "statfs" "ac_cv_func_statfs"
 if test "x$ac_cv_func_statfs" = xyes
 then :
   printf "%s\n" "#define HAVE_STATFS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "statvfs" "ac_cv_func_statvfs"
 if test "x$ac_cv_func_statvfs" = xyes
 then :
   printf "%s\n" "#define HAVE_STATVFS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strcasestr" "ac_cv_func_strcasestr"
 if test "x$ac_cv_func_strcasestr" = xyes
 then :
   printf "%s\n" "#define HAVE_STRCASESTR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strdup" "ac_cv_func_strdup"
 if test "x$ac_cv_func_strdup" = xyes
 then :
   printf "%s\n" "#define HAVE_STRDUP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strerror" "ac_cv_func_strerror"
 if test "x$ac_cv_func_strerror" = xyes
 then :
   printf "%s\n" "#define HAVE_STRERROR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strlcat" "ac_cv_func_strlcat"
 if test "x$ac_cv_func_strlcat" = xyes
 then :
   printf "%s\n" "#define HAVE_STRLCAT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strlcpy" "ac_cv_func_strlcpy"
 if test "x$ac_cv_func_strlcpy" = xyes
 then :
   printf "%s\n" "#define HAVE_STRLCPY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strmode" "ac_cv_func_strmode"
 if test "x$ac_cv_func_strmode" = xyes
 then :
   printf "%s\n" "#define HAVE_STRMODE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strndup" "ac_cv_func_strndup"
 if test "x$ac_cv_func_strndup" = xyes
 then :
   printf "%s\n" "#define HAVE_STRNDUP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strnlen" "ac_cv_func_strnlen"
 if test "x$ac_cv_func_strnlen" = xyes
 then :
   printf "%s\n" "#define HAVE_STRNLEN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strnvis" "ac_cv_func_strnvis"
 if test "x$ac_cv_func_strnvis" = xyes
 then :
   printf "%s\n" "#define HAVE_STRNVIS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strptime" "ac_cv_func_strptime"
 if test "x$ac_cv_func_strptime" = xyes
 then :
   printf "%s\n" "#define HAVE_STRPTIME 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strsignal" "ac_cv_func_strsignal"
 if test "x$ac_cv_func_strsignal" = xyes
 then :
   printf "%s\n" "#define HAVE_STRSIGNAL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strtonum" "ac_cv_func_strtonum"
 if test "x$ac_cv_func_strtonum" = xyes
 then :
   printf "%s\n" "#define HAVE_STRTONUM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strtoll" "ac_cv_func_strtoll"
 if test "x$ac_cv_func_strtoll" = xyes
 then :
   printf "%s\n" "#define HAVE_STRTOLL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strtoul" "ac_cv_func_strtoul"
 if test "x$ac_cv_func_strtoul" = xyes
 then :
   printf "%s\n" "#define HAVE_STRTOUL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "strtoull" "ac_cv_func_strtoull"
 if test "x$ac_cv_func_strtoull" = xyes
 then :
   printf "%s\n" "#define HAVE_STRTOULL 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "swap32" "ac_cv_func_swap32"
 if test "x$ac_cv_func_swap32" = xyes
 then :
   printf "%s\n" "#define HAVE_SWAP32 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "sysconf" "ac_cv_func_sysconf"
 if test "x$ac_cv_func_sysconf" = xyes
 then :
   printf "%s\n" "#define HAVE_SYSCONF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "tcgetpgrp" "ac_cv_func_tcgetpgrp"
 if test "x$ac_cv_func_tcgetpgrp" = xyes
 then :
   printf "%s\n" "#define HAVE_TCGETPGRP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "timegm" "ac_cv_func_timegm"
 if test "x$ac_cv_func_timegm" = xyes
 then :
   printf "%s\n" "#define HAVE_TIMEGM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "timingsafe_bcmp" "ac_cv_func_timingsafe_bcmp"
 if test "x$ac_cv_func_timingsafe_bcmp" = xyes
 then :
   printf "%s\n" "#define HAVE_TIMINGSAFE_BCMP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "truncate" "ac_cv_func_truncate"
 if test "x$ac_cv_func_truncate" = xyes
 then :
   printf "%s\n" "#define HAVE_TRUNCATE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "unsetenv" "ac_cv_func_unsetenv"
 if test "x$ac_cv_func_unsetenv" = xyes
 then :
   printf "%s\n" "#define HAVE_UNSETENV 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "updwtmpx" "ac_cv_func_updwtmpx"
 if test "x$ac_cv_func_updwtmpx" = xyes
 then :
   printf "%s\n" "#define HAVE_UPDWTMPX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "utimensat" "ac_cv_func_utimensat"
 if test "x$ac_cv_func_utimensat" = xyes
 then :
   printf "%s\n" "#define HAVE_UTIMENSAT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "user_from_uid" "ac_cv_func_user_from_uid"
 if test "x$ac_cv_func_user_from_uid" = xyes
 then :
   printf "%s\n" "#define HAVE_USER_FROM_UID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "usleep" "ac_cv_func_usleep"
 if test "x$ac_cv_func_usleep" = xyes
 then :
   printf "%s\n" "#define HAVE_USLEEP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "vasprintf" "ac_cv_func_vasprintf"
 if test "x$ac_cv_func_vasprintf" = xyes
 then :
   printf "%s\n" "#define HAVE_VASPRINTF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "vsnprintf" "ac_cv_func_vsnprintf"
 if test "x$ac_cv_func_vsnprintf" = xyes
 then :
   printf "%s\n" "#define HAVE_VSNPRINTF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "waitpid" "ac_cv_func_waitpid"
 if test "x$ac_cv_func_waitpid" = xyes
 then :
   printf "%s\n" "#define HAVE_WAITPID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "warn" "ac_cv_func_warn"
 if test "x$ac_cv_func_warn" = xyes
 then :
   printf "%s\n" "#define HAVE_WARN 1" >>confdefs.h
 
 fi
 
 
 ac_fn_check_decl "$LINENO" "bzero" "ac_cv_have_decl_bzero" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_bzero" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_BZERO $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "memmem" "ac_cv_have_decl_memmem" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_memmem" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_MEMMEM $ac_have_decl" >>confdefs.h
 
 
 ac_fn_c_check_func "$LINENO" "mblen" "ac_cv_func_mblen"
 if test "x$ac_cv_func_mblen" = xyes
 then :
   printf "%s\n" "#define HAVE_MBLEN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "mbtowc" "ac_cv_func_mbtowc"
 if test "x$ac_cv_func_mbtowc" = xyes
 then :
   printf "%s\n" "#define HAVE_MBTOWC 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "nl_langinfo" "ac_cv_func_nl_langinfo"
 if test "x$ac_cv_func_nl_langinfo" = xyes
 then :
   printf "%s\n" "#define HAVE_NL_LANGINFO 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "wcwidth" "ac_cv_func_wcwidth"
 if test "x$ac_cv_func_wcwidth" = xyes
 then :
   printf "%s\n" "#define HAVE_WCWIDTH 1" >>confdefs.h
 
 fi
 
 
 TEST_SSH_UTF8=${TEST_SSH_UTF8:=yes}
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for utf8 locale support" >&5
 printf %s "checking for utf8 locale support... " >&6; }
 if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming yes" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <locale.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
 	if (loc != NULL)
 		exit(0);
 	exit(1);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	 TEST_SSH_UTF8=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <ctype.h>
 int
 main (void)
 {
  return (isblank('a'));
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 printf "%s\n" "#define HAVE_ISBLANK 1" >>confdefs.h
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 disable_pkcs11=
 # Check whether --enable-pkcs11 was given.
 if test ${enable_pkcs11+y}
 then :
   enableval=$enable_pkcs11;
 		if test "x$enableval" = "xno" ; then
 			disable_pkcs11=1
 		fi
 
 
 fi
 
 
 disable_sk=
 # Check whether --enable-security-key was given.
 if test ${enable_security_key+y}
 then :
   enableval=$enable_security_key;
 		if test "x$enableval" = "xno" ; then
 			disable_sk=1
 		fi
 
 
 fi
 
 enable_sk_internal=
 
 # Check whether --with-security-key-builtin was given.
 if test ${with_security_key_builtin+y}
 then :
   withval=$with_security_key_builtin;  enable_sk_internal=$withval
 
 fi
 
 
+disable_ecdsa=
+# Check whether --enable-dsa-keys was given.
+if test ${enable_dsa_keys+y}
+then :
+  enableval=$enable_dsa_keys;
+		if test "x$enableval" = "xno" ; then
+			disable_ecdsa=1
+		fi
+
+
+fi
+
+test -z "$disable_ecdsa" &&
+
+printf "%s\n" "#define WITH_DSA 1" >>confdefs.h
+
+
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
 printf %s "checking for library containing dlopen... " >&6; }
 if test ${ac_cv_search_dlopen+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dlopen ();
 int
 main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' dl
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_dlopen=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_dlopen+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_dlopen+y}
 then :
 
 else $as_nop
   ac_cv_search_dlopen=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
 printf "%s\n" "$ac_cv_search_dlopen" >&6; }
 ac_res=$ac_cv_search_dlopen
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
 if test "x$ac_cv_func_dlopen" = xyes
 then :
   printf "%s\n" "#define HAVE_DLOPEN 1" >>confdefs.h
 
 fi
 
 ac_fn_check_decl "$LINENO" "RTLD_NOW" "ac_cv_have_decl_RTLD_NOW" "#include <dlfcn.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_RTLD_NOW" = xyes
 then :
 
 fi
 
 # IRIX has a const char return value for gai_strerror()
 
   for ac_func in gai_strerror
 do :
   ac_fn_c_check_func "$LINENO" "gai_strerror" "ac_cv_func_gai_strerror"
 if test "x$ac_cv_func_gai_strerror" = xyes
 then :
   printf "%s\n" "#define HAVE_GAI_STRERROR 1" >>confdefs.h
 
 	printf "%s\n" "#define HAVE_GAI_STRERROR 1" >>confdefs.h
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 
 const char *gai_strerror(int);
 
 int
 main (void)
 {
 
 	char *str;
 	str = gai_strerror(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 
 printf "%s\n" "#define HAVE_CONST_GAI_STRERROR_PROTO 1" >>confdefs.h
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 done
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing nanosleep" >&5
 printf %s "checking for library containing nanosleep... " >&6; }
 if test ${ac_cv_search_nanosleep+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char nanosleep ();
 int
 main (void)
 {
 return nanosleep ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' rt posix4
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_nanosleep=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_nanosleep+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_nanosleep+y}
 then :
 
 else $as_nop
   ac_cv_search_nanosleep=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_nanosleep" >&5
 printf "%s\n" "$ac_cv_search_nanosleep" >&6; }
 ac_res=$ac_cv_search_nanosleep
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 printf "%s\n" "#define HAVE_NANOSLEEP 1" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
 printf %s "checking for library containing clock_gettime... " >&6; }
 if test ${ac_cv_search_clock_gettime+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char clock_gettime ();
 int
 main (void)
 {
 return clock_gettime ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' rt
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_clock_gettime=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_clock_gettime+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_clock_gettime+y}
 then :
 
 else $as_nop
   ac_cv_search_clock_gettime=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
 printf "%s\n" "$ac_cv_search_clock_gettime" >&6; }
 ac_res=$ac_cv_search_clock_gettime
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 printf "%s\n" "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
 
 fi
 
 
 ac_fn_check_decl "$LINENO" "localtime_r" "ac_cv_have_decl_localtime_r" " #include <time.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_localtime_r" = xyes
 then :
 
 else $as_nop
    saved_CPPFLAGS="$CPPFLAGS"
 	  CPPFLAGS="$CPPFLAGS -D_REENTRANT"
 	  unset ac_cv_have_decl_localtime_r
 	  ac_fn_check_decl "$LINENO" "localtime_r" "ac_cv_have_decl_localtime_r" " #include <time.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_localtime_r" = xyes
 then :
 
 else $as_nop
    CPPFLAGS="$saved_CPPFLAGS"
 fi
 
 fi
 
 ac_fn_check_decl "$LINENO" "strsep" "ac_cv_have_decl_strsep" "
 #ifdef HAVE_STRING_H
 # include <string.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_strsep" = xyes
 then :
   ac_fn_c_check_func "$LINENO" "strsep" "ac_cv_func_strsep"
 if test "x$ac_cv_func_strsep" = xyes
 then :
   printf "%s\n" "#define HAVE_STRSEP 1" >>confdefs.h
 
 fi
 
 fi
 
 ac_fn_check_decl "$LINENO" "tcsendbreak" "ac_cv_have_decl_tcsendbreak" "#include <termios.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_tcsendbreak" = xyes
 then :
   printf "%s\n" "#define HAVE_TCSENDBREAK 1" >>confdefs.h
 
 else $as_nop
   ac_fn_c_check_func "$LINENO" "tcsendbreak" "ac_cv_func_tcsendbreak"
 if test "x$ac_cv_func_tcsendbreak" = xyes
 then :
   printf "%s\n" "#define HAVE_TCSENDBREAK 1" >>confdefs.h
 
 fi
 
 fi
 
 ac_fn_check_decl "$LINENO" "h_errno" "ac_cv_have_decl_h_errno" "#include <netdb.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_h_errno" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_H_ERRNO $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "SHUT_RD" "ac_cv_have_decl_SHUT_RD" "
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_SHUT_RD" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_SHUT_RD $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "getpeereid" "ac_cv_have_decl_getpeereid" "
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_getpeereid" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_GETPEEREID $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "O_NONBLOCK" "ac_cv_have_decl_O_NONBLOCK" "
 #include <sys/types.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef HAVE_FCNTL_H
 # include <fcntl.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_O_NONBLOCK" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_O_NONBLOCK $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "ftruncate" "ac_cv_have_decl_ftruncate" "
 #include <sys/types.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_ftruncate" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_FTRUNCATE $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "getentropy" "ac_cv_have_decl_getentropy" "
 #include <sys/types.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_getentropy" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_GETENTROPY $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "readv" "ac_cv_have_decl_readv" "
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_readv" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_READV $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "writev" "ac_cv_have_decl_writev" "
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_writev" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_WRITEV $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "MAXSYMLINKS" "ac_cv_have_decl_MAXSYMLINKS" "
 #include <sys/param.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_MAXSYMLINKS" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_MAXSYMLINKS $ac_have_decl" >>confdefs.h
 
 
 ac_fn_check_decl "$LINENO" "offsetof" "ac_cv_have_decl_offsetof" "
 #include <stddef.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_offsetof" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_OFFSETOF $ac_have_decl" >>confdefs.h
 
 
 # extra bits for select(2)
 ac_fn_check_decl "$LINENO" "howmany" "ac_cv_have_decl_howmany" "
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SYSMACROS_H
 #include <sys/sysmacros.h>
 #endif
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_howmany" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_HOWMANY $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "NFDBITS" "ac_cv_have_decl_NFDBITS" "
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SYSMACROS_H
 #include <sys/sysmacros.h>
 #endif
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_NFDBITS" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_NFDBITS $ac_have_decl" >>confdefs.h
 
 ac_fn_c_check_type "$LINENO" "fd_mask" "ac_cv_type_fd_mask" "
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
 "
 if test "x$ac_cv_type_fd_mask" = xyes
 then :
 
 printf "%s\n" "#define HAVE_FD_MASK 1" >>confdefs.h
 
 
 fi
 
 
 
   for ac_func in setresuid
 do :
   ac_fn_c_check_func "$LINENO" "setresuid" "ac_cv_func_setresuid"
 if test "x$ac_cv_func_setresuid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETRESUID 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if setresuid seems to work" >&5
 printf %s "checking if setresuid seems to work... " >&6; }
 	if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking setresuid" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking setresuid" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 int
 main (void)
 {
 
 	errno=0;
 	setresuid(0,0,0);
 	if (errno==ENOSYS)
 		exit(1);
 	else
 		exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 printf "%s\n" "#define BROKEN_SETRESUID 1" >>confdefs.h
 
 		 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not implemented" >&5
 printf "%s\n" "not implemented" >&6; }
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 fi
 
 done
 
 
   for ac_func in setresgid
 do :
   ac_fn_c_check_func "$LINENO" "setresgid" "ac_cv_func_setresgid"
 if test "x$ac_cv_func_setresgid" = xyes
 then :
   printf "%s\n" "#define HAVE_SETRESGID 1" >>confdefs.h
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if setresgid seems to work" >&5
 printf %s "checking if setresgid seems to work... " >&6; }
 	if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking setresuid" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking setresuid" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 int
 main (void)
 {
 
 	errno=0;
 	setresgid(0,0,0);
 	if (errno==ENOSYS)
 		exit(1);
 	else
 		exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 printf "%s\n" "#define BROKEN_SETRESGID 1" >>confdefs.h
 
 		 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not implemented" >&5
 printf "%s\n" "not implemented" >&6; }
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 fi
 
 done
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working fflush(NULL)" >&5
 printf %s "checking for working fflush(NULL)... " >&6; }
 if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming working" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming working" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 fflush(NULL); exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define FFLUSH_NULL_BUG 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
 if test "x$ac_cv_func_gettimeofday" = xyes
 then :
   printf "%s\n" "#define HAVE_GETTIMEOFDAY 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "time" "ac_cv_func_time"
 if test "x$ac_cv_func_time" = xyes
 then :
   printf "%s\n" "#define HAVE_TIME 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_func "$LINENO" "endutent" "ac_cv_func_endutent"
 if test "x$ac_cv_func_endutent" = xyes
 then :
   printf "%s\n" "#define HAVE_ENDUTENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutent" "ac_cv_func_getutent"
 if test "x$ac_cv_func_getutent" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutid" "ac_cv_func_getutid"
 if test "x$ac_cv_func_getutid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutline" "ac_cv_func_getutline"
 if test "x$ac_cv_func_getutline" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTLINE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "pututline" "ac_cv_func_pututline"
 if test "x$ac_cv_func_pututline" = xyes
 then :
   printf "%s\n" "#define HAVE_PUTUTLINE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setutent" "ac_cv_func_setutent"
 if test "x$ac_cv_func_setutent" = xyes
 then :
   printf "%s\n" "#define HAVE_SETUTENT 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_func "$LINENO" "utmpname" "ac_cv_func_utmpname"
 if test "x$ac_cv_func_utmpname" = xyes
 then :
   printf "%s\n" "#define HAVE_UTMPNAME 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_func "$LINENO" "endutxent" "ac_cv_func_endutxent"
 if test "x$ac_cv_func_endutxent" = xyes
 then :
   printf "%s\n" "#define HAVE_ENDUTXENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutxent" "ac_cv_func_getutxent"
 if test "x$ac_cv_func_getutxent" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTXENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutxid" "ac_cv_func_getutxid"
 if test "x$ac_cv_func_getutxid" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTXID 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutxline" "ac_cv_func_getutxline"
 if test "x$ac_cv_func_getutxline" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTXLINE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "getutxuser" "ac_cv_func_getutxuser"
 if test "x$ac_cv_func_getutxuser" = xyes
 then :
   printf "%s\n" "#define HAVE_GETUTXUSER 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "pututxline" "ac_cv_func_pututxline"
 if test "x$ac_cv_func_pututxline" = xyes
 then :
   printf "%s\n" "#define HAVE_PUTUTXLINE 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_func "$LINENO" "setutxdb" "ac_cv_func_setutxdb"
 if test "x$ac_cv_func_setutxdb" = xyes
 then :
   printf "%s\n" "#define HAVE_SETUTXDB 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "setutxent" "ac_cv_func_setutxent"
 if test "x$ac_cv_func_setutxent" = xyes
 then :
   printf "%s\n" "#define HAVE_SETUTXENT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "utmpxname" "ac_cv_func_utmpxname"
 if test "x$ac_cv_func_utmpxname" = xyes
 then :
   printf "%s\n" "#define HAVE_UTMPXNAME 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_func "$LINENO" "getlastlogxbyname" "ac_cv_func_getlastlogxbyname"
 if test "x$ac_cv_func_getlastlogxbyname" = xyes
 then :
   printf "%s\n" "#define HAVE_GETLASTLOGXBYNAME 1" >>confdefs.h
 
 fi
 
 
 ac_fn_c_check_func "$LINENO" "daemon" "ac_cv_func_daemon"
 if test "x$ac_cv_func_daemon" = xyes
 then :
 
 printf "%s\n" "#define HAVE_DAEMON 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for daemon in -lbsd" >&5
 printf %s "checking for daemon in -lbsd... " >&6; }
 if test ${ac_cv_lib_bsd_daemon+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lbsd  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char daemon ();
 int
 main (void)
 {
 return daemon ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_bsd_daemon=yes
 else $as_nop
   ac_cv_lib_bsd_daemon=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bsd_daemon" >&5
 printf "%s\n" "$ac_cv_lib_bsd_daemon" >&6; }
 if test "x$ac_cv_lib_bsd_daemon" = xyes
 then :
   LIBS="$LIBS -lbsd"; printf "%s\n" "#define HAVE_DAEMON 1" >>confdefs.h
 
 fi
 
 
 fi
 
 
 ac_fn_c_check_func "$LINENO" "getpagesize" "ac_cv_func_getpagesize"
 if test "x$ac_cv_func_getpagesize" = xyes
 then :
 
 printf "%s\n" "#define HAVE_GETPAGESIZE 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getpagesize in -lucb" >&5
 printf %s "checking for getpagesize in -lucb... " >&6; }
 if test ${ac_cv_lib_ucb_getpagesize+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lucb  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char getpagesize ();
 int
 main (void)
 {
 return getpagesize ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_ucb_getpagesize=yes
 else $as_nop
   ac_cv_lib_ucb_getpagesize=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ucb_getpagesize" >&5
 printf "%s\n" "$ac_cv_lib_ucb_getpagesize" >&6; }
 if test "x$ac_cv_lib_ucb_getpagesize" = xyes
 then :
   LIBS="$LIBS -lucb"; printf "%s\n" "#define HAVE_GETPAGESIZE 1" >>confdefs.h
 
 fi
 
 
 fi
 
 
 # Check for broken snprintf
 if test "x$ac_cv_func_snprintf" = "xyes" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf correctly terminates long strings" >&5
 printf %s "checking whether snprintf correctly terminates long strings... " >&6; }
 	if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Assuming working snprintf()" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Assuming working snprintf()" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	char b[5];
 	snprintf(b,5,"123456789");
 	exit(b[4]!='\0');
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define BROKEN_SNPRINTF 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ****** Your snprintf() function is broken, complain to your vendor" >&5
 printf "%s\n" "$as_me: WARNING: ****** Your snprintf() function is broken, complain to your vendor" >&2;}
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 if test "x$ac_cv_func_snprintf" = "xyes" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf understands %zu" >&5
 printf %s "checking whether snprintf understands %zu... " >&6; }
 	if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Assuming working snprintf()" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Assuming working snprintf()" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 int
 main (void)
 {
 
 	size_t a = 1, b = 2;
 	char z[128];
 	snprintf(z, sizeof z, "%zu%zu", a, b);
 	exit(strcmp(z, "12"));
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define BROKEN_SNPRINTF 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 # We depend on vsnprintf returning the right thing on overflow: the
 # number of characters it tried to create (as per SUSv3)
 if test "x$ac_cv_func_vsnprintf" = "xyes" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether vsnprintf returns correct values on overflow" >&5
 printf %s "checking whether vsnprintf returns correct values on overflow... " >&6; }
 	if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Assuming working vsnprintf()" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Assuming working vsnprintf()" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdarg.h>
 
 int x_snprintf(char *str, size_t count, const char *fmt, ...)
 {
 	size_t ret;
 	va_list ap;
 
 	va_start(ap, fmt);
 	ret = vsnprintf(str, count, fmt, ap);
 	va_end(ap);
 	return ret;
 }
 
 int
 main (void)
 {
 
 char x[1];
 if (x_snprintf(x, 1, "%s %d", "hello", 12345) != 11)
 	return 1;
 if (x_snprintf(NULL, 0, "%s %d", "hello", 12345) != 11)
 	return 1;
 return 0;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define BROKEN_SNPRINTF 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ****** Your vsnprintf() function is broken, complain to your vendor" >&5
 printf "%s\n" "$as_me: WARNING: ****** Your vsnprintf() function is broken, complain to your vendor" >&2;}
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 # On systems where [v]snprintf is broken, but is declared in stdio,
 # check that the fmt argument is const char * or just char *.
 # This is only useful for when BROKEN_SNPRINTF
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether snprintf can declare const char *fmt" >&5
 printf %s "checking whether snprintf can declare const char *fmt... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 int snprintf(char *a, size_t b, const char *c, ...) { return 0; }
 
 int
 main (void)
 {
 
 	snprintf(0, 0, 0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define SNPRINTF_CONST const" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
     printf "%s\n" "#define SNPRINTF_CONST /* not const */" >>confdefs.h
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 # Check for missing getpeereid (or equiv) support
 NO_PEERCHECK=""
 if test "x$ac_cv_func_getpeereid" != "xyes" -a "x$ac_cv_func_getpeerucred" != "xyes"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether system supports SO_PEERCRED getsockopt" >&5
 printf %s "checking whether system supports SO_PEERCRED getsockopt... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 int
 main (void)
 {
 int i = SO_PEERCRED;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HAVE_SO_PEERCRED 1" >>confdefs.h
 
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		NO_PEERCHECK=1
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 if test ! -z "$check_for_openpty_ctty_bug"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if openpty correctly handles controlling tty" >&5
 printf %s "checking if openpty correctly handles controlling tty... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cross-compiling, assuming yes" >&5
 printf "%s\n" "cross-compiling, assuming yes" >&6; }
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #ifdef HAVE_PTY_H
 # include <pty.h>
 #endif
 #include <sys/fcntl.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
 int
 main (void)
 {
 
 	pid_t pid;
 	int fd, ptyfd, ttyfd, status;
 
 	pid = fork();
 	if (pid < 0) {		/* failed */
 		exit(1);
 	} else if (pid > 0) {	/* parent */
 		waitpid(pid, &status, 0);
 		if (WIFEXITED(status))
 			exit(WEXITSTATUS(status));
 		else
 			exit(2);
 	} else {		/* child */
 		close(0); close(1); close(2);
 		setsid();
 		openpty(&ptyfd, &ttyfd, NULL, NULL, NULL);
 		fd = open("/dev/tty", O_RDWR | O_NOCTTY);
 		if (fd >= 0)
 			exit(3);	/* Acquired ctty: broken */
 		else
 			exit(0);	/* Did not acquire ctty: OK */
 	}
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			printf "%s\n" "#define SSHD_ACQUIRES_CTTY 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
     test "x$check_for_hpux_broken_getaddrinfo" = "x1"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if getaddrinfo seems to work" >&5
 printf %s "checking if getaddrinfo seems to work... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cross-compiling, assuming yes" >&5
 printf "%s\n" "cross-compiling, assuming yes" >&6; }
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <errno.h>
 #include <netinet/in.h>
 
 #define TEST_PORT "2222"
 
 int
 main (void)
 {
 
 	int err, sock;
 	struct addrinfo *gai_ai, *ai, hints;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
 
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = PF_UNSPEC;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_PASSIVE;
 
 	err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
 	if (err != 0) {
 		fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
 		exit(1);
 	}
 
 	for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET6)
 			continue;
 
 		err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
 		    sizeof(ntop), strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV);
 
 		if (err != 0) {
 			if (err == EAI_SYSTEM)
 				perror("getnameinfo EAI_SYSTEM");
 			else
 				fprintf(stderr, "getnameinfo failed: %s\n",
 				    gai_strerror(err));
 			exit(2);
 		}
 
 		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (sock < 0)
 			perror("socket");
 		if (bind(sock, ai->ai_addr, ai->ai_addrlen) < 0) {
 			if (errno == EBADF)
 				exit(3);
 		}
 	}
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
     test "x$check_for_aix_broken_getaddrinfo" = "x1"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if getaddrinfo seems to work" >&5
 printf %s "checking if getaddrinfo seems to work... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cross-compiling, assuming no" >&5
 printf "%s\n" "cross-compiling, assuming no" >&6; }
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <errno.h>
 #include <netinet/in.h>
 
 #define TEST_PORT "2222"
 
 int
 main (void)
 {
 
 	int err, sock;
 	struct addrinfo *gai_ai, *ai, hints;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
 
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = PF_UNSPEC;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_PASSIVE;
 
 	err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
 	if (err != 0) {
 		fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
 		exit(1);
 	}
 
 	for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
 			continue;
 
 		err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
 		    sizeof(ntop), strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV);
 
 		if (ai->ai_family == AF_INET && err != 0) {
 			perror("getnameinfo");
 			exit(2);
 		}
 	}
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define AIX_GETNAMEINFO_HACK 1" >>confdefs.h
 
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			printf "%s\n" "#define BROKEN_GETADDRINFO 1" >>confdefs.h
 
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes"; then
 	ac_fn_check_decl "$LINENO" "AI_NUMERICSERV" "ac_cv_have_decl_AI_NUMERICSERV" "#include <sys/types.h>
 	     #include <sys/socket.h>
 	     #include <netdb.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_AI_NUMERICSERV" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_AI_NUMERICSERV $ac_have_decl" >>confdefs.h
 
 fi
 
 if test "x$check_for_conflicting_getspnam" = "x1"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for conflicting getspnam in shadow.h" >&5
 printf %s "checking for conflicting getspnam in shadow.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <shadow.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
  exit(0);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define GETSPNAM_CONFLICTING_DEFS 1" >>confdefs.h
 
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 if test "x$ac_cv_func_strnvis" = "xyes"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working strnvis" >&5
 printf %s "checking for working strnvis... " >&6; }
 	if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming broken" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming broken" >&2;}
 
 printf "%s\n" "#define BROKEN_STRNVIS 1" >>confdefs.h
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <vis.h>
 static void sighandler(int sig) { _exit(1); }
 
 int
 main (void)
 {
 
 	char dst[16];
 
 	signal(SIGSEGV, sighandler);
 	if (strnvis(dst, "src", 4, 0) && strcmp(dst, "src") == 0)
 		exit(0);
 	exit(1)
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define BROKEN_STRNVIS 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if SA_RESTARTed signals interrupt select()" >&5
 printf %s "checking if SA_RESTARTed signals interrupt select()... " >&6; }
 if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming yes" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef HAVE_SYS_SELECT
 # include <sys/select.h>
 #endif
 #include <sys/types.h>
 #include <sys/time.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <unistd.h>
 static void sighandler(int sig) { }
 
 int
 main (void)
 {
 
 	int r;
 	pid_t pid;
 	struct sigaction sa;
 
 	sa.sa_handler = sighandler;
 	sa.sa_flags = SA_RESTART;
 	(void)sigaction(SIGTERM, &sa, NULL);
 	if ((pid = fork()) == 0) { /* child */
 		pid = getppid();
 		sleep(1);
 		kill(pid, SIGTERM);
 		sleep(1);
 		if (getppid() == pid) /* if parent did not exit, shoot it */
 			kill(pid, SIGKILL);
 		exit(0);
 	} else { /* parent */
 		r = select(0, NULL, NULL, NULL, NULL);
 	}
 	exit(r == -1 ? 0 : 1);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define NO_SA_RESTART 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 
   for ac_func in getpgrp
 do :
   ac_fn_c_check_func "$LINENO" "getpgrp" "ac_cv_func_getpgrp"
 if test "x$ac_cv_func_getpgrp" = xyes
 then :
   printf "%s\n" "#define HAVE_GETPGRP 1" >>confdefs.h
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if getpgrp accepts zero args" >&5
 printf %s "checking if getpgrp accepts zero args... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 int
 main (void)
 {
  getpgrp();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define GETPGRP_VOID 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define GETPGRP_VOID 0" >>confdefs.h
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 
 done
 
 # Search for OpenSSL
 saved_CPPFLAGS="$CPPFLAGS"
 saved_LDFLAGS="$LDFLAGS"
 openssl_bin_PATH="$PATH"
 
 # Check whether --with-ssl-dir was given.
 if test ${with_ssl_dir+y}
 then :
   withval=$with_ssl_dir;
 		if test "x$openssl" = "xno" ; then
 			as_fn_error $? "cannot use --with-ssl-dir when OpenSSL disabled" "$LINENO" 5
 		fi
 		if test "x$withval" != "xno" ; then
 			case "$withval" in
 				# Relative paths
 				./*|../*)	withval="`pwd`/$withval"
 			esac
 			if test -d "$withval/lib"; then
 				libcrypto_path="${withval}/lib"
 			elif test -d "$withval/lib64"; then
 				libcrypto_path="$withval/lib64"
 			else
 				# Built but not installed
 				libcrypto_path="${withval}"
 			fi
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${libcrypto_path} ${rpath_opt}${libcrypto_path} ${LDFLAGS}"
 			else
 				LDFLAGS="-L${libcrypto_path} ${LDFLAGS}"
 			fi
 			if test -d "$withval/include"; then
 				CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
 			else
 				CPPFLAGS="-I${withval} ${CPPFLAGS}"
 			fi
-			openssl_bin_PATH="${PATH}${PATH_SEPARATOR}${withval}/bin${PATH_SEPARATOR}${withval}/apps"
+									if test -x "${withval}/bin/openssl" && \
+			    "${withval}/bin/openssl" version >/dev/null 2>&1; then
+				openssl_bin_PATH="${withval}/bin${PATH_SEPARATOR}${PATH}"
+			elif test -x "${withval}/apps/openssl" && \
+			    "${withval}/apps/openssl" version >/dev/null 2>&1; then
+				openssl_bin_PATH="${withval}/apps${PATH_SEPARATOR}${PATH}"
+			fi
 		fi
 
 
 fi
 
 for ac_prog in openssl
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_openssl_bin+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $openssl_bin in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_openssl_bin="$openssl_bin" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $openssl_bin_PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_openssl_bin="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 openssl_bin=$ac_cv_path_openssl_bin
 if test -n "$openssl_bin"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $openssl_bin" >&5
 printf "%s\n" "$openssl_bin" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
   test -n "$openssl_bin" && break
 done
 
 OPENSSL_BIN=${openssl_bin}
 
 
 
 # Check whether --with-openssl-header-check was given.
 if test ${with_openssl_header_check+y}
 then :
   withval=$with_openssl_header_check;
 		if test "x$withval" = "xno" ; then
 			openssl_check_nonfatal=1
 		fi
 
 
 fi
 
 
 openssl_engine=no
 
 # Check whether --with-ssl-engine was given.
 if test ${with_ssl_engine+y}
 then :
   withval=$with_ssl_engine;
 		if test "x$withval" != "xno" ; then
 			if test "x$openssl" = "xno" ; then
 				as_fn_error $? "cannot use --with-ssl-engine when OpenSSL disabled" "$LINENO" 5
 			fi
 			openssl_engine=yes
 		fi
 
 
 fi
 
 
 nocrypto_saved_LIBS="$LIBS"
 if test "x$openssl" = "xyes" ; then
 	LIBS="-lcrypto $LIBS"
 	CHANNELLIBS="-lcrypto $CHANNELLIBS"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char RAND_add ();
 int
 main (void)
 {
 return RAND_add ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 else $as_nop
   as_fn_error $? "*** working libcrypto not found, check config.log" "$LINENO" 5
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 	ac_fn_c_check_header_compile "$LINENO" "openssl/opensslv.h" "ac_cv_header_openssl_opensslv_h" "$ac_includes_default"
 if test "x$ac_cv_header_openssl_opensslv_h" = xyes
 then :
 
 else $as_nop
   as_fn_error $? "*** OpenSSL headers missing - please install first or check config.log ***" "$LINENO" 5
 fi
 
 
 	# Determine OpenSSL header version
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking OpenSSL header version" >&5
 printf %s "checking OpenSSL header version... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking" >&2;}
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <stdio.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#define DATA "conftest.sslincver"
 
 int
 main (void)
 {
 
 		FILE *fd;
 		int rc;
 
 		fd = fopen(DATA,"w");
 		if(fd == NULL)
 			exit(1);
 
 		if ((rc = fprintf(fd, "%08lx (%s)\n",
 		    (unsigned long)OPENSSL_VERSION_NUMBER,
 		     OPENSSL_VERSION_TEXT)) < 0)
 			exit(1);
 
 		exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			ssl_header_ver=`cat conftest.sslincver`
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ssl_header_ver" >&5
 printf "%s\n" "$ssl_header_ver" >&6; }
 
 else $as_nop
 
-			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-printf "%s\n" "not found" >&6; }
-			as_fn_error $? "OpenSSL version header not found." "$LINENO" 5
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
+			as_fn_error $? "OpenSSL version test program failed." "$LINENO" 5
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 	# Determining OpenSSL library version is version dependent.
 	ac_fn_c_check_func "$LINENO" "OpenSSL_version" "ac_cv_func_OpenSSL_version"
 if test "x$ac_cv_func_OpenSSL_version" = xyes
 then :
   printf "%s\n" "#define HAVE_OPENSSL_VERSION 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "OpenSSL_version_num" "ac_cv_func_OpenSSL_version_num"
 if test "x$ac_cv_func_OpenSSL_version_num" = xyes
 then :
   printf "%s\n" "#define HAVE_OPENSSL_VERSION_NUM 1" >>confdefs.h
 
 fi
 
 
 	# Determine OpenSSL library version
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking OpenSSL library version" >&5
 printf %s "checking OpenSSL library version... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking" >&2;}
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdio.h>
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#include <openssl/crypto.h>
 	#define DATA "conftest.ssllibver"
 
 int
 main (void)
 {
 
 		FILE *f;
 		/* We need these legacy bits to warn for old libcrypto */
 		#ifndef OPENSSL_VERSION
 		# define OPENSSL_VERSION SSLEAY_VERSION
 		#endif
 		#ifndef HAVE_OPENSSL_VERSION
 		# define OpenSSL_version       SSLeay_version
 		#endif
 		#ifndef HAVE_OPENSSL_VERSION_NUM
 		# define OpenSSL_version_num   SSLeay
 		#endif
 		if ((f = fopen(DATA, "w")) == NULL)
 			exit(1);
 		if (fprintf(f, "%08lx (%s)",
 		    (unsigned long)OpenSSL_version_num(),
 		    OpenSSL_version(OPENSSL_VERSION)) < 0)
 			exit(1);
 #ifdef LIBRESSL_VERSION_NUMBER
 		if (fprintf(f, " libressl-%08lx", LIBRESSL_VERSION_NUMBER) < 0)
 			exit(1);
 #endif
 		if (fputc('\n', f) == EOF || fclose(f) == EOF)
 			exit(1);
 		exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			sslver=`cat conftest.ssllibver`
 			ssl_showver=`echo "$sslver" | sed 's/ libressl-.*//'`
 			# Check version is supported.
 			case "$sslver" in
 			100*|10100*) # 1.0.x, 1.1.0x
 				as_fn_error $? "OpenSSL >= 1.1.1 required (have \"$ssl_showver\")" "$LINENO" 5
 				;;
 			101*)   ;; # 1.1.x
 			200*)   # LibreSSL
 				lver=`echo "$sslver" | sed 's/.*libressl-//'`
 				case "$lver" in
 				2*|300*) # 2.x, 3.0.0
 					as_fn_error $? "LibreSSL >= 3.1.0 required (have \"$ssl_showver\")" "$LINENO" 5
 					;;
 				*) ;;	# Assume all other versions are good.
 				esac
 				;;
 			300*)
 				# OpenSSL 3; we use the 1.1x API
 				CPPFLAGS="$CPPFLAGS -DOPENSSL_API_COMPAT=0x10100000L"
 				;;
 			301*|302*|303*)
 				# OpenSSL development branch; request 1.1x API
 				CPPFLAGS="$CPPFLAGS -DOPENSSL_API_COMPAT=0x10100000L"
 				;;
 		        *)
 				as_fn_error $? "Unknown/unsupported OpenSSL version (\"$ssl_showver\")" "$LINENO" 5
 		                ;;
 			esac
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ssl_showver" >&5
 printf "%s\n" "$ssl_showver" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
 printf "%s\n" "not found" >&6; }
 			as_fn_error $? "OpenSSL library not found." "$LINENO" 5
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 	case "$host" in
 	x86_64-*)
 		case "$sslver" in
 		3000004*)
 			as_fn_error $? "OpenSSL 3.0.4 has a potential RCE in its RSA implementation (CVE-2022-2274)" "$LINENO" 5
 			;;
 		esac
 	esac
 
 	# Sanity check OpenSSL headers
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL's headers match the library" >&5
 printf %s "checking whether OpenSSL's headers match the library... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking" >&2;}
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#include <openssl/crypto.h>
 
 int
 main (void)
 {
 
 		exit(OpenSSL_version_num() == OPENSSL_VERSION_NUMBER ? 0 : 1);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			if test "x$openssl_check_nonfatal" = "x"; then
 				as_fn_error $? "Your OpenSSL headers do not match your
 	library. Check config.log for details.
 	If you are sure your installation is consistent, you can disable the check
 	by running \"./configure --without-openssl-header-check\".
 	Also see contrib/findssl.sh for help identifying header/library mismatches.
 	" "$LINENO" 5
 			else
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Your OpenSSL headers do not match your
 	library. Check config.log for details.
 	Also see contrib/findssl.sh for help identifying header/library mismatches." >&5
 printf "%s\n" "$as_me: WARNING: Your OpenSSL headers do not match your
 	library. Check config.log for details.
 	Also see contrib/findssl.sh for help identifying header/library mismatches." >&2;}
 			fi
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if programs using OpenSSL functions will link" >&5
 printf %s "checking if programs using OpenSSL functions will link... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <openssl/err.h>
 int
 main (void)
 {
  ERR_load_crypto_strings();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			LIBS="$LIBS -ldl"
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if programs using OpenSSL need -ldl" >&5
 printf %s "checking if programs using OpenSSL need -ldl... " >&6; }
 			cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <openssl/err.h>
 int
 main (void)
 {
  ERR_load_crypto_strings();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 					CHANNELLIBS="$CHANNELLIBS -ldl"
 
 else $as_nop
 
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	ac_fn_c_check_func "$LINENO" "BN_is_prime_ex" "ac_cv_func_BN_is_prime_ex"
 if test "x$ac_cv_func_BN_is_prime_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_BN_IS_PRIME_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "DES_crypt" "ac_cv_func_DES_crypt"
 if test "x$ac_cv_func_DES_crypt" = xyes
 then :
   printf "%s\n" "#define HAVE_DES_CRYPT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "DSA_generate_parameters_ex" "ac_cv_func_DSA_generate_parameters_ex"
 if test "x$ac_cv_func_DSA_generate_parameters_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_DSA_GENERATE_PARAMETERS_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_DigestFinal_ex" "ac_cv_func_EVP_DigestFinal_ex"
 if test "x$ac_cv_func_EVP_DigestFinal_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_DIGESTFINAL_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_DigestInit_ex" "ac_cv_func_EVP_DigestInit_ex"
 if test "x$ac_cv_func_EVP_DigestInit_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_DIGESTINIT_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_MD_CTX_cleanup" "ac_cv_func_EVP_MD_CTX_cleanup"
 if test "x$ac_cv_func_EVP_MD_CTX_cleanup" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_MD_CTX_CLEANUP 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_MD_CTX_copy_ex" "ac_cv_func_EVP_MD_CTX_copy_ex"
 if test "x$ac_cv_func_EVP_MD_CTX_copy_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_MD_CTX_COPY_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_MD_CTX_init" "ac_cv_func_EVP_MD_CTX_init"
 if test "x$ac_cv_func_EVP_MD_CTX_init" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_MD_CTX_INIT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "HMAC_CTX_init" "ac_cv_func_HMAC_CTX_init"
 if test "x$ac_cv_func_HMAC_CTX_init" = xyes
 then :
   printf "%s\n" "#define HAVE_HMAC_CTX_INIT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "RSA_generate_key_ex" "ac_cv_func_RSA_generate_key_ex"
 if test "x$ac_cv_func_RSA_generate_key_ex" = xyes
 then :
   printf "%s\n" "#define HAVE_RSA_GENERATE_KEY_EX 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "RSA_get_default_method" "ac_cv_func_RSA_get_default_method"
 if test "x$ac_cv_func_RSA_get_default_method" = xyes
 then :
   printf "%s\n" "#define HAVE_RSA_GET_DEFAULT_METHOD 1" >>confdefs.h
 
 fi
 
 
 	# OpenSSL_add_all_algorithms may be a macro.
 	ac_fn_c_check_func "$LINENO" "OpenSSL_add_all_algorithms" "ac_cv_func_OpenSSL_add_all_algorithms"
 if test "x$ac_cv_func_OpenSSL_add_all_algorithms" = xyes
 then :
 
 printf "%s\n" "#define HAVE_OPENSSL_ADD_ALL_ALGORITHMS 1" >>confdefs.h
 
 else $as_nop
   ac_fn_check_decl "$LINENO" "OpenSSL_add_all_algorithms" "ac_cv_have_decl_OpenSSL_add_all_algorithms" "#include <openssl/evp.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_OpenSSL_add_all_algorithms" = xyes
 then :
 
 printf "%s\n" "#define HAVE_OPENSSL_ADD_ALL_ALGORITHMS 1" >>confdefs.h
 
 fi
 
 fi
 
 
 	# LibreSSL/OpenSSL API differences
 	ac_fn_c_check_func "$LINENO" "EVP_CIPHER_CTX_iv" "ac_cv_func_EVP_CIPHER_CTX_iv"
 if test "x$ac_cv_func_EVP_CIPHER_CTX_iv" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CIPHER_CTX_IV 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_CIPHER_CTX_iv_noconst" "ac_cv_func_EVP_CIPHER_CTX_iv_noconst"
 if test "x$ac_cv_func_EVP_CIPHER_CTX_iv_noconst" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CIPHER_CTX_IV_NOCONST 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_CIPHER_CTX_get_iv" "ac_cv_func_EVP_CIPHER_CTX_get_iv"
 if test "x$ac_cv_func_EVP_CIPHER_CTX_get_iv" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CIPHER_CTX_GET_IV 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_CIPHER_CTX_get_updated_iv" "ac_cv_func_EVP_CIPHER_CTX_get_updated_iv"
 if test "x$ac_cv_func_EVP_CIPHER_CTX_get_updated_iv" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CIPHER_CTX_GET_UPDATED_IV 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_CIPHER_CTX_set_iv" "ac_cv_func_EVP_CIPHER_CTX_set_iv"
 if test "x$ac_cv_func_EVP_CIPHER_CTX_set_iv" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CIPHER_CTX_SET_IV 1" >>confdefs.h
 
 fi
 
 
 	if test "x$openssl_engine" = "xyes" ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for OpenSSL ENGINE support" >&5
 printf %s "checking for OpenSSL ENGINE support... " >&6; }
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <openssl/engine.h>
 
 int
 main (void)
 {
 
 				ENGINE_load_builtin_engines();
 				ENGINE_register_all_complete();
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define USE_OPENSSL_ENGINE 1" >>confdefs.h
 
 
 else $as_nop
    as_fn_error $? "OpenSSL ENGINE support not found" "$LINENO" 5
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 	fi
 
 	# Check for OpenSSL without EVP_aes_{192,256}_cbc
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL has crippled AES support" >&5
-printf %s "checking whether OpenSSL has crippled AES support... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL lacks support for AES 192/256" >&5
+printf %s "checking whether OpenSSL lacks support for AES 192/256... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/evp.h>
 
 int
 main (void)
 {
 
 		exit(EVP_aes_192_cbc() == NULL || EVP_aes_256_cbc() == NULL);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define OPENSSL_LOBOTOMISED_AES 1" >>confdefs.h
 
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if EVP_DigestUpdate returns an int" >&5
 printf %s "checking if EVP_DigestUpdate returns an int... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/evp.h>
 
 int
 main (void)
 {
 
 		if(EVP_DigestUpdate(NULL, NULL,0))
 			exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define OPENSSL_EVP_DIGESTUPDATE_VOID 1" >>confdefs.h
 
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	# Check for various EVP support in OpenSSL
 	ac_fn_c_check_func "$LINENO" "EVP_sha256" "ac_cv_func_EVP_sha256"
 if test "x$ac_cv_func_EVP_sha256" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_sha384" "ac_cv_func_EVP_sha384"
 if test "x$ac_cv_func_EVP_sha384" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_SHA384 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_sha512" "ac_cv_func_EVP_sha512"
 if test "x$ac_cv_func_EVP_sha512" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_SHA512 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "EVP_chacha20" "ac_cv_func_EVP_chacha20"
 if test "x$ac_cv_func_EVP_chacha20" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_CHACHA20 1" >>confdefs.h
 
 fi
 
 
 	# Check complete ECC support in OpenSSL
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL has NID_X9_62_prime256v1" >&5
 printf %s "checking whether OpenSSL has NID_X9_62_prime256v1... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 
 int
 main (void)
 {
 
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
 		const EVP_MD *m = EVP_sha256(); /* We need this too */
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 		  enable_nistp256=1
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL has NID_secp384r1" >&5
 printf %s "checking whether OpenSSL has NID_secp384r1... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 
 int
 main (void)
 {
 
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp384r1);
 		const EVP_MD *m = EVP_sha384(); /* We need this too */
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 		  enable_nistp384=1
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL has NID_secp521r1" >&5
 printf %s "checking whether OpenSSL has NID_secp521r1... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 
 int
 main (void)
 {
 
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
 		const EVP_MD *m = EVP_sha512(); /* We need this too */
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if OpenSSL's NID_secp521r1 is functional" >&5
 printf %s "checking if OpenSSL's NID_secp521r1 is functional... " >&6; }
 		  if test "$cross_compiling" = yes
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross-compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross-compiling: assuming yes" >&2;}
 			  enable_nistp521=1
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 
 int
 main (void)
 {
 
 			EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
 			const EVP_MD *m = EVP_sha512(); /* We need this too */
 			exit(e == NULL || m == NULL);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			  enable_nistp521=1
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 	if test x$enable_nistp256 = x1 || test x$enable_nistp384 = x1 || \
 	    test x$enable_nistp521 = x1; then
 
 printf "%s\n" "#define OPENSSL_HAS_ECC 1" >>confdefs.h
 
 		ac_fn_c_check_func "$LINENO" "EC_KEY_METHOD_new" "ac_cv_func_EC_KEY_METHOD_new"
 if test "x$ac_cv_func_EC_KEY_METHOD_new" = xyes
 then :
   printf "%s\n" "#define HAVE_EC_KEY_METHOD_NEW 1" >>confdefs.h
 
 fi
 
 		openssl_ecc=yes
 	else
 		openssl_ecc=no
 	fi
 	if test x$enable_nistp256 = x1; then
 
 printf "%s\n" "#define OPENSSL_HAS_NISTP256 1" >>confdefs.h
 
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdsa-sha2-nistp256 \
 			ecdh-sha2-nistp256 \
 			ecdsa-sha2-nistp256-cert-v01@openssh.com"
 	fi
 	if test x$enable_nistp384 = x1; then
 
 printf "%s\n" "#define OPENSSL_HAS_NISTP384 1" >>confdefs.h
 
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdsa-sha2-nistp384 \
 			ecdh-sha2-nistp384 \
 			ecdsa-sha2-nistp384-cert-v01@openssh.com"
 	fi
 	if test x$enable_nistp521 = x1; then
 
 printf "%s\n" "#define OPENSSL_HAS_NISTP521 1" >>confdefs.h
 
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdh-sha2-nistp521 \
 			ecdsa-sha2-nistp521 \
 			ecdsa-sha2-nistp521-cert-v01@openssh.com"
 	fi
 
 	# Check libcrypto ED25519 support
 	ac_fn_c_check_func "$LINENO" "EVP_PKEY_get_raw_public_key" "ac_cv_func_EVP_PKEY_get_raw_public_key"
 if test "x$ac_cv_func_EVP_PKEY_get_raw_public_key" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_PKEY_GET_RAW_PUBLIC_KEY 1" >>confdefs.h
 
 fi
 
 	ac_fn_c_check_func "$LINENO" "EVP_PKEY_get_raw_private_key" "ac_cv_func_EVP_PKEY_get_raw_private_key"
 if test "x$ac_cv_func_EVP_PKEY_get_raw_private_key" = xyes
 then :
   printf "%s\n" "#define HAVE_EVP_PKEY_GET_RAW_PRIVATE_KEY 1" >>confdefs.h
 
 fi
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL has ED25519 support" >&5
 printf %s "checking whether OpenSSL has ED25519 support... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <string.h>
 	#include <openssl/evp.h>
 
 int
 main (void)
 {
 
 		unsigned char buf[64];
 		memset(buf, 0, sizeof(buf));
 		exit(EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519,
 		    buf, sizeof(buf)) == NULL);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define OPENSSL_HAS_ED25519 1" >>confdefs.h
 
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 fi
 
 # PKCS11/U2F depend on OpenSSL and dlopen().
 enable_pkcs11=yes
 enable_sk=yes
 if test "x$openssl" != "xyes" ; then
 	enable_pkcs11="disabled; missing libcrypto"
 fi
 if test "x$ac_cv_func_dlopen" != "xyes" ; then
 	enable_pkcs11="disabled; missing dlopen(3)"
 	enable_sk="disabled; missing dlopen(3)"
 fi
 if test "x$ac_cv_have_decl_RTLD_NOW" != "xyes" ; then
 	enable_pkcs11="disabled; missing RTLD_NOW"
 	enable_sk="disabled; missing RTLD_NOW"
 fi
 if test ! -z "$disable_pkcs11" ; then
 	enable_pkcs11="disabled by user"
 fi
 if test ! -z "$disable_sk" ; then
 	enable_sk="disabled by user"
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to enable PKCS11" >&5
 printf %s "checking whether to enable PKCS11... " >&6; }
 if test "x$enable_pkcs11" = "xyes" ; then
 
 printf "%s\n" "#define ENABLE_PKCS11 /**/" >>confdefs.h
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_pkcs11" >&5
 printf "%s\n" "$enable_pkcs11" >&6; }
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to enable U2F" >&5
 printf %s "checking whether to enable U2F... " >&6; }
 if test "x$enable_sk" = "xyes" ; then
 
 printf "%s\n" "#define ENABLE_SK /**/" >>confdefs.h
 
 	SK_DUMMY_LIBRARY=regress/misc/sk-dummy/sk-dummy.so
 
 else
 	# Do not try to build sk-dummy library.
 	SK_DUMMY_LIBRARY=""
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_sk" >&5
 printf "%s\n" "$enable_sk" >&6; }
 
 # Now check for built-in security key support.
 if test "x$enable_sk" = "xyes" -a "x$enable_sk_internal" != "xno" ; then
 	use_pkgconfig_for_libfido2=
 	if test "x$PKGCONFIG" != "xno"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $PKGCONFIG knows about libfido2" >&5
 printf %s "checking if $PKGCONFIG knows about libfido2... " >&6; }
 		if "$PKGCONFIG" libfido2; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			use_pkgconfig_for_libfido2=yes
 		else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		fi
 	fi
 	if test "x$use_pkgconfig_for_libfido2" = "xyes"; then
 		LIBFIDO2=`$PKGCONFIG --libs libfido2`
 		CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libfido2`"
 	else
 		LIBFIDO2="-lfido2 -lcbor"
 	fi
 	OTHERLIBS=`echo $LIBFIDO2 | sed 's/-lfido2//'`
 	fido2_error=
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for fido_init in -lfido2" >&5
 printf %s "checking for fido_init in -lfido2... " >&6; }
 if test ${ac_cv_lib_fido2_fido_init+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lfido2  $OTHERLIBS
 	 $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char fido_init ();
 int
 main (void)
 {
 return fido_init ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_fido2_fido_init=yes
 else $as_nop
   ac_cv_lib_fido2_fido_init=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_fido2_fido_init" >&5
 printf "%s\n" "$ac_cv_lib_fido2_fido_init" >&6; }
 if test "x$ac_cv_lib_fido2_fido_init" = xyes
 then :
 
 else $as_nop
    fido2_error="missing/unusable libfido2"
 fi
 
 	ac_fn_c_check_header_compile "$LINENO" "fido.h" "ac_cv_header_fido_h" "$ac_includes_default"
 if test "x$ac_cv_header_fido_h" = xyes
 then :
 
 else $as_nop
    fido2_error="missing fido.h from libfido2"
 fi
 
 	ac_fn_c_check_header_compile "$LINENO" "fido/credman.h" "ac_cv_header_fido_credman_h" " #include <fido.h>
 
 "
 if test "x$ac_cv_header_fido_credman_h" = xyes
 then :
 
 else $as_nop
    fido2_error="missing fido/credman.h from libfido2"
 fi
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for usable libfido2 installation" >&5
 printf %s "checking for usable libfido2 installation... " >&6; }
 	if test ! -z "$fido2_error" ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $fido2_error" >&5
 printf "%s\n" "$fido2_error" >&6; }
 		if test "x$enable_sk_internal" = "xyes" ; then
 			as_fn_error $? "No usable libfido2 library/headers found" "$LINENO" 5
 		fi
 		LIBFIDO2=""
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 
 printf "%s\n" "#define ENABLE_SK_INTERNAL /**/" >>confdefs.h
 
 		enable_sk="built-in"
 		saved_LIBS="$LIBS"
 		LIBS="$LIBFIDO2 $LIBS"
 		ac_fn_c_check_func "$LINENO" "fido_assert_set_clientdata" "ac_cv_func_fido_assert_set_clientdata"
 if test "x$ac_cv_func_fido_assert_set_clientdata" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_ASSERT_SET_CLIENTDATA 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_cred_prot" "ac_cv_func_fido_cred_prot"
 if test "x$ac_cv_func_fido_cred_prot" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_CRED_PROT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_cred_set_prot" "ac_cv_func_fido_cred_set_prot"
 if test "x$ac_cv_func_fido_cred_set_prot" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_CRED_SET_PROT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_cred_set_clientdata" "ac_cv_func_fido_cred_set_clientdata"
 if test "x$ac_cv_func_fido_cred_set_clientdata" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_CRED_SET_CLIENTDATA 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_dev_get_touch_begin" "ac_cv_func_fido_dev_get_touch_begin"
 if test "x$ac_cv_func_fido_dev_get_touch_begin" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_DEV_GET_TOUCH_BEGIN 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_dev_get_touch_status" "ac_cv_func_fido_dev_get_touch_status"
 if test "x$ac_cv_func_fido_dev_get_touch_status" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_DEV_GET_TOUCH_STATUS 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_dev_supports_cred_prot" "ac_cv_func_fido_dev_supports_cred_prot"
 if test "x$ac_cv_func_fido_dev_supports_cred_prot" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_DEV_SUPPORTS_CRED_PROT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "fido_dev_is_winhello" "ac_cv_func_fido_dev_is_winhello"
 if test "x$ac_cv_func_fido_dev_is_winhello" = xyes
 then :
   printf "%s\n" "#define HAVE_FIDO_DEV_IS_WINHELLO 1" >>confdefs.h
 
 fi
 
 		LIBS="$saved_LIBS"
 	fi
 fi
 
 ac_fn_c_check_func "$LINENO" "arc4random" "ac_cv_func_arc4random"
 if test "x$ac_cv_func_arc4random" = xyes
 then :
   printf "%s\n" "#define HAVE_ARC4RANDOM 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "arc4random_buf" "ac_cv_func_arc4random_buf"
 if test "x$ac_cv_func_arc4random_buf" = xyes
 then :
   printf "%s\n" "#define HAVE_ARC4RANDOM_BUF 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "arc4random_stir" "ac_cv_func_arc4random_stir"
 if test "x$ac_cv_func_arc4random_stir" = xyes
 then :
   printf "%s\n" "#define HAVE_ARC4RANDOM_STIR 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "arc4random_uniform" "ac_cv_func_arc4random_uniform"
 if test "x$ac_cv_func_arc4random_uniform" = xyes
 then :
   printf "%s\n" "#define HAVE_ARC4RANDOM_UNIFORM 1" >>confdefs.h
 
 fi
 
 ### Configure cryptographic random number support
 
 # Check whether OpenSSL seeds itself
 if test "x$openssl" = "xyes" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether OpenSSL's PRNG is internally seeded" >&5
 printf %s "checking whether OpenSSL's PRNG is internally seeded... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming yes" >&2;}
 			# This is safe, since we will fatal() at runtime if
 			# OpenSSL is not seeded correctly.
 			OPENSSL_SEEDS_ITSELF=yes
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/rand.h>
 
 int
 main (void)
 {
 
 		exit(RAND_status() == 1 ? 0 : 1);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			OPENSSL_SEEDS_ITSELF=yes
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 # PRNGD TCP socket
 
 # Check whether --with-prngd-port was given.
 if test ${with_prngd_port+y}
 then :
   withval=$with_prngd_port;
 		case "$withval" in
 		no)
 			withval=""
 			;;
 		[0-9]*)
 			;;
 		*)
 			as_fn_error $? "You must specify a numeric port number for --with-prngd-port" "$LINENO" 5
 			;;
 		esac
 		if test ! -z "$withval" ; then
 			PRNGD_PORT="$withval"
 
 printf "%s\n" "#define PRNGD_PORT $PRNGD_PORT" >>confdefs.h
 
 		fi
 
 
 fi
 
 
 # PRNGD Unix domain socket
 
 # Check whether --with-prngd-socket was given.
 if test ${with_prngd_socket+y}
 then :
   withval=$with_prngd_socket;
 		case "$withval" in
 		yes)
 			withval="/var/run/egd-pool"
 			;;
 		no)
 			withval=""
 			;;
 		/*)
 			;;
 		*)
 			as_fn_error $? "You must specify an absolute path to the entropy socket" "$LINENO" 5
 			;;
 		esac
 
 		if test ! -z "$withval" ; then
 			if test ! -z "$PRNGD_PORT" ; then
 				as_fn_error $? "You may not specify both a PRNGD/EGD port and socket" "$LINENO" 5
 			fi
 			if test ! -r "$withval" ; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Entropy socket is not readable" >&5
 printf "%s\n" "$as_me: WARNING: Entropy socket is not readable" >&2;}
 			fi
 			PRNGD_SOCKET="$withval"
 
 printf "%s\n" "#define PRNGD_SOCKET \"$PRNGD_SOCKET\"" >>confdefs.h
 
 		fi
 
 else $as_nop
 
 		# Check for existing socket only if we don't have a random device already
 		if test "x$OPENSSL_SEEDS_ITSELF" != "xyes" ; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PRNGD/EGD socket" >&5
 printf %s "checking for PRNGD/EGD socket... " >&6; }
 			# Insert other locations here
 			for sock in /var/run/egd-pool /dev/egd-pool /etc/entropy; do
 				if test -r $sock && $TEST_MINUS_S_SH -c "test -S $sock -o -p $sock" ; then
 					PRNGD_SOCKET="$sock"
 					printf "%s\n" "#define PRNGD_SOCKET \"$PRNGD_SOCKET\"" >>confdefs.h
 
 					break;
 				fi
 			done
 			if test ! -z "$PRNGD_SOCKET" ; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PRNGD_SOCKET" >&5
 printf "%s\n" "$PRNGD_SOCKET" >&6; }
 			else
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
 printf "%s\n" "not found" >&6; }
 			fi
 		fi
 
 
 fi
 
 
 # Which randomness source do we use?
 if test ! -z "$PRNGD_PORT" ; then
 	RAND_MSG="PRNGd port $PRNGD_PORT"
 elif test ! -z "$PRNGD_SOCKET" ; then
 	RAND_MSG="PRNGd socket $PRNGD_SOCKET"
 elif test ! -z "$OPENSSL_SEEDS_ITSELF" ; then
 
 printf "%s\n" "#define OPENSSL_PRNG_ONLY 1" >>confdefs.h
 
 	RAND_MSG="OpenSSL internal ONLY"
 elif test "x$openssl" = "xno" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: OpenSSH will use /dev/urandom as a source of random numbers. It will fail if this device is not supported or accessible" >&5
 printf "%s\n" "$as_me: WARNING: OpenSSH will use /dev/urandom as a source of random numbers. It will fail if this device is not supported or accessible" >&2;}
 else
 	as_fn_error $? "OpenSSH has no source of random numbers. Please configure OpenSSL with an entropy source or re-run configure using one of the --with-prngd-port or --with-prngd-socket options" "$LINENO" 5
 fi
 LIBS="$nocrypto_saved_LIBS"
 
 saved_LIBS="$LIBS"
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ia_openinfo in -liaf" >&5
 printf %s "checking for ia_openinfo in -liaf... " >&6; }
 if test ${ac_cv_lib_iaf_ia_openinfo+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-liaf  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char ia_openinfo ();
 int
 main (void)
 {
 return ia_openinfo ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_iaf_ia_openinfo=yes
 else $as_nop
   ac_cv_lib_iaf_ia_openinfo=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_iaf_ia_openinfo" >&5
 printf "%s\n" "$ac_cv_lib_iaf_ia_openinfo" >&6; }
 if test "x$ac_cv_lib_iaf_ia_openinfo" = xyes
 then :
 
 	LIBS="$LIBS -liaf"
 
   for ac_func in set_id
 do :
   ac_fn_c_check_func "$LINENO" "set_id" "ac_cv_func_set_id"
 if test "x$ac_cv_func_set_id" = xyes
 then :
   printf "%s\n" "#define HAVE_SET_ID 1" >>confdefs.h
  SSHDLIBS="$SSHDLIBS -liaf"
 
 printf "%s\n" "#define HAVE_LIBIAF 1" >>confdefs.h
 
 
 fi
 
 done
 
 fi
 
 LIBS="$saved_LIBS"
 
 # Check for crypt() in libcrypt.  If we have it, we only need it for sshd.
 saved_LIBS="$LIBS"
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for crypt in -lcrypt" >&5
 printf %s "checking for crypt in -lcrypt... " >&6; }
 if test ${ac_cv_lib_crypt_crypt+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lcrypt  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char crypt ();
 int
 main (void)
 {
 return crypt ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_crypt_crypt=yes
 else $as_nop
   ac_cv_lib_crypt_crypt=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_crypt_crypt" >&5
 printf "%s\n" "$ac_cv_lib_crypt_crypt" >&6; }
 if test "x$ac_cv_lib_crypt_crypt" = xyes
 then :
 
 	LIBS="-lcrypt $LIBS"
 	SSHDLIBS="-lcrypt $SSHDLIBS"
 
 fi
 
 ac_fn_c_check_func "$LINENO" "crypt" "ac_cv_func_crypt"
 if test "x$ac_cv_func_crypt" = xyes
 then :
   printf "%s\n" "#define HAVE_CRYPT 1" >>confdefs.h
 
 fi
 
 LIBS="$saved_LIBS"
 
 # Check for PAM libs
 PAM_MSG="no"
 
 # Check whether --with-pam was given.
 if test ${with_pam+y}
 then :
   withval=$with_pam;
 		if test "x$withval" != "xno" ; then
 			if test "x$ac_cv_header_security_pam_appl_h" != "xyes" && \
 			   test "x$ac_cv_header_pam_pam_appl_h" != "xyes" ; then
 				as_fn_error $? "PAM headers not found" "$LINENO" 5
 			fi
 
 			saved_LIBS="$LIBS"
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 printf %s "checking for dlopen in -ldl... " >&6; }
 if test ${ac_cv_lib_dl_dlopen+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dlopen ();
 int
 main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_dl_dlopen=yes
 else $as_nop
   ac_cv_lib_dl_dlopen=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
 printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
 if test "x$ac_cv_lib_dl_dlopen" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBDL 1" >>confdefs.h
 
   LIBS="-ldl $LIBS"
 
 fi
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pam_set_item in -lpam" >&5
 printf %s "checking for pam_set_item in -lpam... " >&6; }
 if test ${ac_cv_lib_pam_pam_set_item+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lpam  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char pam_set_item ();
 int
 main (void)
 {
 return pam_set_item ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_pam_pam_set_item=yes
 else $as_nop
   ac_cv_lib_pam_pam_set_item=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pam_pam_set_item" >&5
 printf "%s\n" "$ac_cv_lib_pam_pam_set_item" >&6; }
 if test "x$ac_cv_lib_pam_pam_set_item" = xyes
 then :
   printf "%s\n" "#define HAVE_LIBPAM 1" >>confdefs.h
 
   LIBS="-lpam $LIBS"
 
 else $as_nop
   as_fn_error $? "*** libpam missing" "$LINENO" 5
 fi
 
 			ac_fn_c_check_func "$LINENO" "pam_getenvlist" "ac_cv_func_pam_getenvlist"
 if test "x$ac_cv_func_pam_getenvlist" = xyes
 then :
   printf "%s\n" "#define HAVE_PAM_GETENVLIST 1" >>confdefs.h
 
 fi
 
 			ac_fn_c_check_func "$LINENO" "pam_putenv" "ac_cv_func_pam_putenv"
 if test "x$ac_cv_func_pam_putenv" = xyes
 then :
   printf "%s\n" "#define HAVE_PAM_PUTENV 1" >>confdefs.h
 
 fi
 
 			LIBS="$saved_LIBS"
 
 			PAM_MSG="yes"
 
 			SSHDLIBS="$SSHDLIBS -lpam"
 
 printf "%s\n" "#define USE_PAM 1" >>confdefs.h
 
 
 			if test $ac_cv_lib_dl_dlopen = yes; then
 				case "$LIBS" in
 				*-ldl*)
 					# libdl already in LIBS
 					;;
 				*)
 					SSHDLIBS="$SSHDLIBS -ldl"
 					;;
 				esac
 			fi
 		fi
 
 
 fi
 
 
 
 # Check whether --with-pam-service was given.
 if test ${with_pam_service+y}
 then :
   withval=$with_pam_service;
 		if test "x$withval" != "xno" && \
 		   test "x$withval" != "xyes" ; then
 
 printf "%s\n" "#define SSHD_PAM_SERVICE \"$withval\"" >>confdefs.h
 
 		fi
 
 
 fi
 
 
 # Check for older PAM
 if test "x$PAM_MSG" = "xyes" ; then
 	# Check PAM strerror arguments (old PAM)
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pam_strerror takes only one argument" >&5
 printf %s "checking whether pam_strerror takes only one argument... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdlib.h>
 #if defined(HAVE_SECURITY_PAM_APPL_H)
 #include <security/pam_appl.h>
 #elif defined (HAVE_PAM_PAM_APPL_H)
 #include <pam/pam_appl.h>
 #endif
 
 int
 main (void)
 {
 
 (void)pam_strerror((pam_handle_t *)NULL, -1);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 else $as_nop
 
 
 printf "%s\n" "#define HAVE_OLD_PAM 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 			PAM_MSG="yes (old library)"
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 case "$host" in
 *-*-cygwin*)
 	SSH_PRIVSEP_USER=CYGWIN_SSH_PRIVSEP_USER
 	;;
 *)
 	SSH_PRIVSEP_USER=sshd
 	;;
 esac
 
 # Check whether --with-privsep-user was given.
 if test ${with_privsep_user+y}
 then :
   withval=$with_privsep_user;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			SSH_PRIVSEP_USER=$withval
 		fi
 
 
 fi
 
 if test "x$SSH_PRIVSEP_USER" = "xCYGWIN_SSH_PRIVSEP_USER" ; then
 
 printf "%s\n" "#define SSH_PRIVSEP_USER CYGWIN_SSH_PRIVSEP_USER" >>confdefs.h
 
 else
 
 printf "%s\n" "#define SSH_PRIVSEP_USER \"$SSH_PRIVSEP_USER\"" >>confdefs.h
 
 fi
 
 
 if test "x$have_linux_no_new_privs" = "x1" ; then
 ac_fn_check_decl "$LINENO" "SECCOMP_MODE_FILTER" "ac_cv_have_decl_SECCOMP_MODE_FILTER" "
 	#include <sys/types.h>
 	#include <linux/seccomp.h>
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_SECCOMP_MODE_FILTER" = xyes
 then :
   have_seccomp_filter=1
 fi
 fi
 if test "x$have_seccomp_filter" = "x1" ; then
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking kernel for seccomp_filter support" >&5
 printf %s "checking kernel for seccomp_filter support... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 		#include <errno.h>
 		#include <elf.h>
 		#include <linux/audit.h>
 		#include <linux/seccomp.h>
 		#include <stdlib.h>
 		#include <sys/prctl.h>
 
 int
 main (void)
 {
  int i = $seccomp_audit_arch;
 	   errno = 0;
 	   prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
 	   exit(errno == EFAULT ? 0 : 1);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		# Disable seccomp filter as a target
 		have_seccomp_filter=0
 
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 fi
 
 ac_fn_c_check_member "$LINENO" "struct pollfd" "fd" "ac_cv_member_struct_pollfd_fd" "
 #include <sys/types.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #ifdef HAVE_SYS_POLL_H
 #include <sys/poll.h>
 #endif
 
 "
 if test "x$ac_cv_member_struct_pollfd_fd" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_POLLFD_FD 1" >>confdefs.h
 
 
 fi
 
 
 ac_fn_c_check_type "$LINENO" "nfds_t" "ac_cv_type_nfds_t" "
 #include <sys/types.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #ifdef HAVE_SYS_POLL_H
 #include <sys/poll.h>
 #endif
 
 "
 if test "x$ac_cv_type_nfds_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_NFDS_T 1" >>confdefs.h
 
 
 fi
 
 
 # Decide which sandbox style to use
 sandbox_arg=""
 
 # Check whether --with-sandbox was given.
 if test ${with_sandbox+y}
 then :
   withval=$with_sandbox;
 		if test "x$withval" = "xyes" ; then
 			sandbox_arg=""
 		else
 			sandbox_arg="$withval"
 		fi
 
 
 fi
 
 
 if test "x$sandbox_arg" != "xno"; then
 # POSIX specifies that poll() "shall fail with EINVAL if the nfds argument
 # is greater than OPEN_MAX".  On some platforms that includes implementions
 # of select in userspace on top of poll() so check both work with rlimit
 # NOFILES so check that both work before enabling the rlimit sandbox.
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if select and/or poll works with descriptor rlimit" >&5
 printf %s "checking if select and/or poll works with descriptor rlimit... " >&6; }
     if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming no" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming no" >&2;}
 	 select_works_with_rlimit=no
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/resource.h>
 #ifdef HAVE_SYS_SELECT_H
 # include <sys/select.h>
 #endif
 #ifdef HAVE_POLL_H
 # include <poll.h>
 #elif HAVE_SYS_POLL_H
 # include <sys/poll.h>
 #endif
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	struct rlimit rl_zero;
 	int fd, r;
 	fd_set fds;
 	struct timeval tv;
 #ifdef HAVE_POLL
 	struct pollfd pfd;
 #endif
 
 	fd = open("/dev/null", O_RDONLY);
 	FD_ZERO(&fds);
 	FD_SET(fd, &fds);
 	rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 	setrlimit(RLIMIT_FSIZE, &rl_zero);
 	setrlimit(RLIMIT_NOFILE, &rl_zero);
 	tv.tv_sec = 1;
 	tv.tv_usec = 0;
 	r = select(fd+1, &fds, NULL, NULL, &tv);
 	if (r == -1)
 		exit(1);
 #ifdef HAVE_POLL
 	pfd.fd = fd;
 	pfd.events = POLLIN;
 	r = poll(&pfd, 1, 1);
 	if (r == -1)
 		exit(2);
 #endif
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 	 select_works_with_rlimit=yes
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	 select_works_with_rlimit=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if setrlimit(RLIMIT_NOFILE,{0,0}) works" >&5
 printf %s "checking if setrlimit(RLIMIT_NOFILE,{0,0}) works... " >&6; }
     if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming yes" >&2;}
 	 rlimit_nofile_zero_works=yes
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/resource.h>
 #include <errno.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 	struct rlimit rl_zero;
 	int r;
 
 	rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 	r = setrlimit(RLIMIT_NOFILE, &rl_zero);
 	exit (r == -1 ? 1 : 0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 	 rlimit_nofile_zero_works=yes
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	 rlimit_nofile_zero_works=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if setrlimit RLIMIT_FSIZE works" >&5
 printf %s "checking if setrlimit RLIMIT_FSIZE works... " >&6; }
     if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: assuming yes" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: assuming yes" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/resource.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 		struct rlimit rl_zero;
 
 		rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 		exit(setrlimit(RLIMIT_FSIZE, &rl_zero) != 0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 printf "%s\n" "#define SANDBOX_SKIP_RLIMIT_FSIZE 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 if test "x$sandbox_arg" = "xpledge" || \
    ( test -z "$sandbox_arg" && test "x$ac_cv_func_pledge" = "xyes" ) ; then
 	test "x$ac_cv_func_pledge" != "xyes" && \
 		as_fn_error $? "pledge sandbox requires pledge(2) support" "$LINENO" 5
 	SANDBOX_STYLE="pledge"
 
 printf "%s\n" "#define SANDBOX_PLEDGE 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xsystrace" || \
    ( test -z "$sandbox_arg" && test "x$have_systr_policy_kill" = "x1" ) ; then
 	test "x$have_systr_policy_kill" != "x1" && \
 		as_fn_error $? "systrace sandbox requires systrace headers and SYSTR_POLICY_KILL support" "$LINENO" 5
 	SANDBOX_STYLE="systrace"
 
 printf "%s\n" "#define SANDBOX_SYSTRACE 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xdarwin" || \
      ( test -z "$sandbox_arg" && test "x$ac_cv_func_sandbox_init" = "xyes" && \
        test "x$ac_cv_header_sandbox_h" = "xyes") ; then
 	test "x$ac_cv_func_sandbox_init" != "xyes" -o \
 	     "x$ac_cv_header_sandbox_h" != "xyes" && \
 		as_fn_error $? "Darwin seatbelt sandbox requires sandbox.h and sandbox_init function" "$LINENO" 5
 	SANDBOX_STYLE="darwin"
 
 printf "%s\n" "#define SANDBOX_DARWIN 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xseccomp_filter" || \
      ( test -z "$sandbox_arg" && \
        test "x$have_seccomp_filter" = "x1" && \
        test "x$ac_cv_header_elf_h" = "xyes" && \
        test "x$ac_cv_header_linux_audit_h" = "xyes" && \
        test "x$ac_cv_header_linux_filter_h" = "xyes" && \
        test "x$seccomp_audit_arch" != "x" && \
        test "x$have_linux_no_new_privs" = "x1" && \
        test "x$ac_cv_func_prctl" = "xyes" ) ; then
 	test "x$seccomp_audit_arch" = "x" && \
 		as_fn_error $? "seccomp_filter sandbox not supported on $host" "$LINENO" 5
 	test "x$have_linux_no_new_privs" != "x1" && \
 		as_fn_error $? "seccomp_filter sandbox requires PR_SET_NO_NEW_PRIVS" "$LINENO" 5
 	test "x$have_seccomp_filter" != "x1" && \
 		as_fn_error $? "seccomp_filter sandbox requires seccomp headers" "$LINENO" 5
 	test "x$ac_cv_func_prctl" != "xyes" && \
 		as_fn_error $? "seccomp_filter sandbox requires prctl function" "$LINENO" 5
 	SANDBOX_STYLE="seccomp_filter"
 
 printf "%s\n" "#define SANDBOX_SECCOMP_FILTER 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xcapsicum" || \
      ( test -z "$sandbox_arg" && \
        test "x$disable_capsicum" != "xyes" && \
        test "x$ac_cv_header_sys_capsicum_h" = "xyes" && \
        test "x$ac_cv_func_cap_rights_limit" = "xyes") ; then
        test "x$ac_cv_header_sys_capsicum_h" != "xyes" && \
 		as_fn_error $? "capsicum sandbox requires sys/capsicum.h header" "$LINENO" 5
        test "x$ac_cv_func_cap_rights_limit" != "xyes" && \
 		as_fn_error $? "capsicum sandbox requires cap_rights_limit function" "$LINENO" 5
        SANDBOX_STYLE="capsicum"
 
 printf "%s\n" "#define SANDBOX_CAPSICUM 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xrlimit" || \
      ( test -z "$sandbox_arg" && test "x$ac_cv_func_setrlimit" = "xyes" && \
        test "x$select_works_with_rlimit" = "xyes" && \
        test "x$rlimit_nofile_zero_works" = "xyes" ) ; then
 	test "x$ac_cv_func_setrlimit" != "xyes" && \
 		as_fn_error $? "rlimit sandbox requires setrlimit function" "$LINENO" 5
 	test "x$select_works_with_rlimit" != "xyes" && \
 		as_fn_error $? "rlimit sandbox requires select to work with rlimit" "$LINENO" 5
 	SANDBOX_STYLE="rlimit"
 
 printf "%s\n" "#define SANDBOX_RLIMIT 1" >>confdefs.h
 
 elif test "x$sandbox_arg" = "xsolaris" || \
    ( test -z "$sandbox_arg" && test "x$SOLARIS_PRIVS" = "xyes" ) ; then
 	SANDBOX_STYLE="solaris"
 
 printf "%s\n" "#define SANDBOX_SOLARIS 1" >>confdefs.h
 
 elif test -z "$sandbox_arg" || test "x$sandbox_arg" = "xno" || \
      test "x$sandbox_arg" = "xnone" || test "x$sandbox_arg" = "xnull" ; then
 	SANDBOX_STYLE="none"
 
 printf "%s\n" "#define SANDBOX_NULL 1" >>confdefs.h
 
 else
 	as_fn_error $? "unsupported --with-sandbox" "$LINENO" 5
 fi
 
 # Cheap hack to ensure NEWS-OS libraries are arranged right.
 if test ! -z "$SONY" ; then
   LIBS="$LIBS -liberty";
 fi
 
 # Check for long long datatypes
 ac_fn_c_check_type "$LINENO" "long long" "ac_cv_type_long_long" "$ac_includes_default"
 if test "x$ac_cv_type_long_long" = xyes
 then :
 
 printf "%s\n" "#define HAVE_LONG_LONG 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "unsigned long long" "ac_cv_type_unsigned_long_long" "$ac_includes_default"
 if test "x$ac_cv_type_unsigned_long_long" = xyes
 then :
 
 printf "%s\n" "#define HAVE_UNSIGNED_LONG_LONG 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "long double" "ac_cv_type_long_double" "$ac_includes_default"
 if test "x$ac_cv_type_long_double" = xyes
 then :
 
 printf "%s\n" "#define HAVE_LONG_DOUBLE 1" >>confdefs.h
 
 
 fi
 
 
 # Check datatype sizes
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of short int" >&5
 printf %s "checking size of short int... " >&6; }
 if test ${ac_cv_sizeof_short_int+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (short int))" "ac_cv_sizeof_short_int"        "$ac_includes_default"
 then :
 
 else $as_nop
   if test "$ac_cv_type_short_int" = yes; then
      { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (short int)
 See \`config.log' for more details" "$LINENO" 5; }
    else
      ac_cv_sizeof_short_int=0
    fi
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_short_int" >&5
 printf "%s\n" "$ac_cv_sizeof_short_int" >&6; }
 
 
 
 printf "%s\n" "#define SIZEOF_SHORT_INT $ac_cv_sizeof_short_int" >>confdefs.h
 
 
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of int" >&5
 printf %s "checking size of int... " >&6; }
 if test ${ac_cv_sizeof_int+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (int))" "ac_cv_sizeof_int"        "$ac_includes_default"
 then :
 
 else $as_nop
   if test "$ac_cv_type_int" = yes; then
      { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (int)
 See \`config.log' for more details" "$LINENO" 5; }
    else
      ac_cv_sizeof_int=0
    fi
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_int" >&5
 printf "%s\n" "$ac_cv_sizeof_int" >&6; }
 
 
 
 printf "%s\n" "#define SIZEOF_INT $ac_cv_sizeof_int" >>confdefs.h
 
 
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of long int" >&5
 printf %s "checking size of long int... " >&6; }
 if test ${ac_cv_sizeof_long_int+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long int))" "ac_cv_sizeof_long_int"        "$ac_includes_default"
 then :
 
 else $as_nop
   if test "$ac_cv_type_long_int" = yes; then
      { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (long int)
 See \`config.log' for more details" "$LINENO" 5; }
    else
      ac_cv_sizeof_long_int=0
    fi
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_long_int" >&5
 printf "%s\n" "$ac_cv_sizeof_long_int" >&6; }
 
 
 
 printf "%s\n" "#define SIZEOF_LONG_INT $ac_cv_sizeof_long_int" >>confdefs.h
 
 
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of long long int" >&5
 printf %s "checking size of long long int... " >&6; }
 if test ${ac_cv_sizeof_long_long_int+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long long int))" "ac_cv_sizeof_long_long_int"        "$ac_includes_default"
 then :
 
 else $as_nop
   if test "$ac_cv_type_long_long_int" = yes; then
      { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (long long int)
 See \`config.log' for more details" "$LINENO" 5; }
    else
      ac_cv_sizeof_long_long_int=0
    fi
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_long_long_int" >&5
 printf "%s\n" "$ac_cv_sizeof_long_long_int" >&6; }
 
 
 
 printf "%s\n" "#define SIZEOF_LONG_LONG_INT $ac_cv_sizeof_long_long_int" >>confdefs.h
 
 
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of time_t" >&5
 printf %s "checking size of time_t... " >&6; }
 if test ${ac_cv_sizeof_time_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (time_t))" "ac_cv_sizeof_time_t"        "
     #include <sys/types.h>
     #ifdef HAVE_SYS_TIME_H
     # include <sys/time.h>
     #endif
     #ifdef HAVE_TIME_H
     # include <time.h>
     #endif
 
 
 "
 then :
 
 else $as_nop
   if test "$ac_cv_type_time_t" = yes; then
      { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (time_t)
 See \`config.log' for more details" "$LINENO" 5; }
    else
      ac_cv_sizeof_time_t=0
    fi
 fi
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_time_t" >&5
 printf "%s\n" "$ac_cv_sizeof_time_t" >&6; }
 
 
 
 printf "%s\n" "#define SIZEOF_TIME_T $ac_cv_sizeof_time_t" >>confdefs.h
 
 
 
 # Sanity check long long for some platforms (AIX)
 if test "x$ac_cv_sizeof_long_long_int" = "x4" ; then
 	ac_cv_sizeof_long_long_int=0
 fi
 
 # compute LLONG_MIN and LLONG_MAX if we don't know them.
 if test -z "$have_llong_max" && test -z "$have_long_long_max"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for max value of long long" >&5
 printf %s "checking for max value of long long... " >&6; }
 	if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking" >&2;}
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 /* Why is this so damn hard? */
 #ifdef __GNUC__
 # undef __GNUC__
 #endif
 #define __USE_ISOC99
 #include <limits.h>
 #define DATA "conftest.llminmax"
 #define my_abs(a) ((a) < 0 ? ((a) * -1) : (a))
 
 /*
  * printf in libc on some platforms (eg old Tru64) does not understand %lld so
  * we do this the hard way.
  */
 static int
 fprint_ll(FILE *f, long long n)
 {
 	unsigned int i;
 	int l[sizeof(long long) * 8];
 
 	if (n < 0)
 		if (fprintf(f, "-") < 0)
 			return -1;
 	for (i = 0; n != 0; i++) {
 		l[i] = my_abs(n % 10);
 		n /= 10;
 	}
 	do {
 		if (fprintf(f, "%d", l[--i]) < 0)
 			return -1;
 	} while (i != 0);
 	if (fprintf(f, " ") < 0)
 		return -1;
 	return 0;
 }
 
 int
 main (void)
 {
 
 	FILE *f;
 	long long i, llmin, llmax = 0;
 
 	if((f = fopen(DATA,"w")) == NULL)
 		exit(1);
 
 #if defined(LLONG_MIN) && defined(LLONG_MAX)
 	fprintf(stderr, "Using system header for LLONG_MIN and LLONG_MAX\n");
 	llmin = LLONG_MIN;
 	llmax = LLONG_MAX;
 #else
 	fprintf(stderr, "Calculating  LLONG_MIN and LLONG_MAX\n");
 	/* This will work on one's complement and two's complement */
 	for (i = 1; i > llmax; i <<= 1, i++)
 		llmax = i;
 	llmin = llmax + 1LL;	/* wrap */
 #endif
 
 	/* Sanity check */
 	if (llmin + 1 < llmin || llmin - 1 < llmin || llmax + 1 > llmax
 	    || llmax - 1 > llmax || llmin == llmax || llmin == 0
 	    || llmax == 0 || llmax < LONG_MAX || llmin > LONG_MIN) {
 		fprintf(f, "unknown unknown\n");
 		exit(2);
 	}
 
 	if (fprint_ll(f, llmin) < 0)
 		exit(3);
 	if (fprint_ll(f, llmax) < 0)
 		exit(4);
 	if (fclose(f) < 0)
 		exit(5);
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 			llong_min=`$AWK '{print $1}' conftest.llminmax`
 			llong_max=`$AWK '{print $2}' conftest.llminmax`
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $llong_max" >&5
 printf "%s\n" "$llong_max" >&6; }
 
 printf "%s\n" "#define LLONG_MAX ${llong_max}LL" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for min value of long long" >&5
 printf %s "checking for min value of long long... " >&6; }
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $llong_min" >&5
 printf "%s\n" "$llong_min" >&6; }
 
 printf "%s\n" "#define LLONG_MIN ${llong_min}LL" >>confdefs.h
 
 
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: not found" >&5
 printf "%s\n" "not found" >&6; }
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 ac_fn_check_decl "$LINENO" "UINT32_MAX" "ac_cv_have_decl_UINT32_MAX" "
 #ifdef HAVE_SYS_LIMITS_H
 # include <sys/limits.h>
 #endif
 #ifdef HAVE_LIMITS_H
 # include <limits.h>
 #endif
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_UINT32_MAX" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_UINT32_MAX $ac_have_decl" >>confdefs.h
 
 
 # More checks for data types
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_int type" >&5
 printf %s "checking for u_int type... " >&6; }
 if test ${ac_cv_have_u_int+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  u_int a; a = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_u_int="yes"
 else $as_nop
    ac_cv_have_u_int="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_u_int" >&5
 printf "%s\n" "$ac_cv_have_u_int" >&6; }
 if test "x$ac_cv_have_u_int" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_U_INT 1" >>confdefs.h
 
 	have_u_int=1
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for intXX_t types" >&5
 printf %s "checking for intXX_t types... " >&6; }
 if test ${ac_cv_have_intxx_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  int8_t a; int16_t b; int32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_intxx_t="yes"
 else $as_nop
    ac_cv_have_intxx_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_intxx_t" >&5
 printf "%s\n" "$ac_cv_have_intxx_t" >&6; }
 if test "x$ac_cv_have_intxx_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_INTXX_T 1" >>confdefs.h
 
 	have_intxx_t=1
 fi
 
 if (test -z "$have_intxx_t" && \
 	   test "x$ac_cv_header_stdint_h" = "xyes")
 then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for intXX_t types in stdint.h" >&5
 printf %s "checking for intXX_t types in stdint.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdint.h>
 int
 main (void)
 {
  int8_t a; int16_t b; int32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_INTXX_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for int64_t type" >&5
 printf %s "checking for int64_t type... " >&6; }
 if test ${ac_cv_have_int64_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <sys/socket.h>
 #ifdef HAVE_SYS_BITYPES_H
 # include <sys/bitypes.h>
 #endif
 
 int
 main (void)
 {
 
 int64_t a; a = 1;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_int64_t="yes"
 else $as_nop
    ac_cv_have_int64_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_int64_t" >&5
 printf "%s\n" "$ac_cv_have_int64_t" >&6; }
 if test "x$ac_cv_have_int64_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_INT64_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_intXX_t types" >&5
 printf %s "checking for u_intXX_t types... " >&6; }
 if test ${ac_cv_have_u_intxx_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_u_intxx_t="yes"
 else $as_nop
    ac_cv_have_u_intxx_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_u_intxx_t" >&5
 printf "%s\n" "$ac_cv_have_u_intxx_t" >&6; }
 if test "x$ac_cv_have_u_intxx_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_U_INTXX_T 1" >>confdefs.h
 
 	have_u_intxx_t=1
 fi
 
 if test -z "$have_u_intxx_t" ; then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_intXX_t types in sys/socket.h" >&5
 printf %s "checking for u_intXX_t types in sys/socket.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/socket.h>
 int
 main (void)
 {
  u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_U_INTXX_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_int64_t types" >&5
 printf %s "checking for u_int64_t types... " >&6; }
 if test ${ac_cv_have_u_int64_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  u_int64_t a; a = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_u_int64_t="yes"
 else $as_nop
    ac_cv_have_u_int64_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_u_int64_t" >&5
 printf "%s\n" "$ac_cv_have_u_int64_t" >&6; }
 if test "x$ac_cv_have_u_int64_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_U_INT64_T 1" >>confdefs.h
 
 	have_u_int64_t=1
 fi
 
 if (test -z "$have_u_int64_t" && \
 	   test "x$ac_cv_header_sys_bitypes_h" = "xyes")
 then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_int64_t type in sys/bitypes.h" >&5
 printf %s "checking for u_int64_t type in sys/bitypes.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/bitypes.h>
 int
 main (void)
 {
  u_int64_t a; a = 1
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_U_INT64_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 if test -z "$have_u_intxx_t" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uintXX_t types" >&5
 printf %s "checking for uintXX_t types... " >&6; }
 if test ${ac_cv_have_uintxx_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 
 int
 main (void)
 {
 
 	uint8_t a;
 	uint16_t b;
 	uint32_t c;
 	a = b = c = 1;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_uintxx_t="yes"
 else $as_nop
    ac_cv_have_uintxx_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_uintxx_t" >&5
 printf "%s\n" "$ac_cv_have_uintxx_t" >&6; }
 	if test "x$ac_cv_have_uintxx_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_UINTXX_T 1" >>confdefs.h
 
 	fi
 fi
 
 if (test -z "$have_uintxx_t" && \
 	   test "x$ac_cv_header_stdint_h" = "xyes")
 then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uintXX_t types in stdint.h" >&5
 printf %s "checking for uintXX_t types in stdint.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdint.h>
 int
 main (void)
 {
  uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_UINTXX_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 if (test -z "$have_uintxx_t" && \
 	   test "x$ac_cv_header_inttypes_h" = "xyes")
 then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uintXX_t types in inttypes.h" >&5
 printf %s "checking for uintXX_t types in inttypes.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <inttypes.h>
 int
 main (void)
 {
  uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_UINTXX_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 if (test -z "$have_u_intxx_t" || test -z "$have_intxx_t" && \
 	   test "x$ac_cv_header_sys_bitypes_h" = "xyes")
 then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for intXX_t and u_intXX_t types in sys/bitypes.h" >&5
 printf %s "checking for intXX_t and u_intXX_t types in sys/bitypes.h... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/bitypes.h>
 
 int
 main (void)
 {
 
 			int8_t a; int16_t b; int32_t c;
 			u_int8_t e; u_int16_t f; u_int32_t g;
 			a = b = c = e = f = g = 1;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 			printf "%s\n" "#define HAVE_U_INTXX_T 1" >>confdefs.h
 
 			printf "%s\n" "#define HAVE_INTXX_T 1" >>confdefs.h
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for u_char" >&5
 printf %s "checking for u_char... " >&6; }
 if test ${ac_cv_have_u_char+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  u_char foo; foo = 125;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_u_char="yes"
 else $as_nop
    ac_cv_have_u_char="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_u_char" >&5
 printf "%s\n" "$ac_cv_have_u_char" >&6; }
 if test "x$ac_cv_have_u_char" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_U_CHAR 1" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "intmax_t" "ac_cv_type_intmax_t" "
 #include <sys/types.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 
 "
 if test "x$ac_cv_type_intmax_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_INTMAX_T 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "uintmax_t" "ac_cv_type_uintmax_t" "
 #include <sys/types.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 
 "
 if test "x$ac_cv_type_uintmax_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_UINTMAX_T 1" >>confdefs.h
 
 
 fi
 
 
 
    ac_fn_c_check_type "$LINENO" "socklen_t" "ac_cv_type_socklen_t" "#include <sys/types.h>
 #include <sys/socket.h>
 "
 if test "x$ac_cv_type_socklen_t" = xyes
 then :
 
 else $as_nop
 
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for socklen_t equivalent" >&5
 printf %s "checking for socklen_t equivalent... " >&6; }
       if test ${curl_cv_socklen_t_equiv+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	 # Systems have either "struct sockaddr *" or
 	 # "void *" as the second argument to getpeername
 	 curl_cv_socklen_t_equiv=
 	 for arg2 in "struct sockaddr" void; do
 	    for t in int size_t unsigned long "unsigned long"; do
 	       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 
 		    #include <sys/types.h>
 		    #include <sys/socket.h>
 		    int getpeername (int, $arg2 *, $t *);
 
 int
 main (void)
 {
 
 		    $t len;
 		    getpeername(0,0,&len);
 
   ;
   return 0;
 }
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
 		  curl_cv_socklen_t_equiv="$t"
 		  break
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 	    done
 	 done
 
 	 if test "x$curl_cv_socklen_t_equiv" = x; then
 	    as_fn_error $? "Cannot find a type to use in place of socklen_t" "$LINENO" 5
 	 fi
 
 fi
 
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $curl_cv_socklen_t_equiv" >&5
 printf "%s\n" "$curl_cv_socklen_t_equiv" >&6; }
 
 printf "%s\n" "#define socklen_t $curl_cv_socklen_t_equiv" >>confdefs.h
 
 fi
 
 
 
 ac_fn_c_check_type "$LINENO" "sig_atomic_t" "ac_cv_type_sig_atomic_t" "#include <signal.h>
 "
 if test "x$ac_cv_type_sig_atomic_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_SIG_ATOMIC_T 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "sighandler_t" "ac_cv_type_sighandler_t" "#include <signal.h>
 "
 if test "x$ac_cv_type_sighandler_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_SIGHANDLER_T 1" >>confdefs.h
 
 
 fi
 
 ac_fn_c_check_type "$LINENO" "fsblkcnt_t" "ac_cv_type_fsblkcnt_t" "
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 
 "
 if test "x$ac_cv_type_fsblkcnt_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_FSBLKCNT_T 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "fsfilcnt_t" "ac_cv_type_fsfilcnt_t" "
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 
 "
 if test "x$ac_cv_type_fsfilcnt_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_FSFILCNT_T 1" >>confdefs.h
 
 
 fi
 
 
 ac_fn_c_check_member "$LINENO" "struct statfs" "f_files" "ac_cv_member_struct_statfs_f_files" "
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 #ifdef HAVE_SYS_VFS_H
 #include <sys/vfs.h>
 #endif
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
 
 "
 if test "x$ac_cv_member_struct_statfs_f_files" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_STATFS_F_FILES 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_member "$LINENO" "struct statfs" "f_flags" "ac_cv_member_struct_statfs_f_flags" "
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 #ifdef HAVE_SYS_VFS_H
 #include <sys/vfs.h>
 #endif
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
 
 "
 if test "x$ac_cv_member_struct_statfs_f_flags" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_STATFS_F_FLAGS 1" >>confdefs.h
 
 
 fi
 
 
 
 ac_fn_c_check_type "$LINENO" "in_addr_t" "ac_cv_type_in_addr_t" "#include <sys/types.h>
 #include <netinet/in.h>
 "
 if test "x$ac_cv_type_in_addr_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_IN_ADDR_T 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "in_port_t" "ac_cv_type_in_port_t" "#include <sys/types.h>
 #include <netinet/in.h>
 "
 if test "x$ac_cv_type_in_port_t" = xyes
 then :
 
 printf "%s\n" "#define HAVE_IN_PORT_T 1" >>confdefs.h
 
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for size_t" >&5
 printf %s "checking for size_t... " >&6; }
 if test ${ac_cv_have_size_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  size_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_size_t="yes"
 else $as_nop
    ac_cv_have_size_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_size_t" >&5
 printf "%s\n" "$ac_cv_have_size_t" >&6; }
 if test "x$ac_cv_have_size_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SIZE_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ssize_t" >&5
 printf %s "checking for ssize_t... " >&6; }
 if test ${ac_cv_have_ssize_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  ssize_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_ssize_t="yes"
 else $as_nop
    ac_cv_have_ssize_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_ssize_t" >&5
 printf "%s\n" "$ac_cv_have_ssize_t" >&6; }
 if test "x$ac_cv_have_ssize_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SSIZE_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for clock_t" >&5
 printf %s "checking for clock_t... " >&6; }
 if test ${ac_cv_have_clock_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <time.h>
 int
 main (void)
 {
  clock_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_clock_t="yes"
 else $as_nop
    ac_cv_have_clock_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_clock_t" >&5
 printf "%s\n" "$ac_cv_have_clock_t" >&6; }
 if test "x$ac_cv_have_clock_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_CLOCK_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sa_family_t" >&5
 printf %s "checking for sa_family_t... " >&6; }
 if test ${ac_cv_have_sa_family_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 
 int
 main (void)
 {
  sa_family_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_sa_family_t="yes"
 else $as_nop
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 
 int
 main (void)
 {
  sa_family_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_sa_family_t="yes"
 else $as_nop
    ac_cv_have_sa_family_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_sa_family_t" >&5
 printf "%s\n" "$ac_cv_have_sa_family_t" >&6; }
 if test "x$ac_cv_have_sa_family_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SA_FAMILY_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pid_t" >&5
 printf %s "checking for pid_t... " >&6; }
 if test ${ac_cv_have_pid_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  pid_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_pid_t="yes"
 else $as_nop
    ac_cv_have_pid_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_pid_t" >&5
 printf "%s\n" "$ac_cv_have_pid_t" >&6; }
 if test "x$ac_cv_have_pid_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_PID_T 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for mode_t" >&5
 printf %s "checking for mode_t... " >&6; }
 if test ${ac_cv_have_mode_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/types.h>
 int
 main (void)
 {
  mode_t foo; foo = 1235;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_mode_t="yes"
 else $as_nop
    ac_cv_have_mode_t="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_mode_t" >&5
 printf "%s\n" "$ac_cv_have_mode_t" >&6; }
 if test "x$ac_cv_have_mode_t" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_MODE_T 1" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct sockaddr_storage" >&5
 printf %s "checking for struct sockaddr_storage... " >&6; }
 if test ${ac_cv_have_struct_sockaddr_storage+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 
 int
 main (void)
 {
  struct sockaddr_storage s;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_sockaddr_storage="yes"
 else $as_nop
    ac_cv_have_struct_sockaddr_storage="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_sockaddr_storage" >&5
 printf "%s\n" "$ac_cv_have_struct_sockaddr_storage" >&6; }
 if test "x$ac_cv_have_struct_sockaddr_storage" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_STORAGE 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct sockaddr_in6" >&5
 printf %s "checking for struct sockaddr_in6... " >&6; }
 if test ${ac_cv_have_struct_sockaddr_in6+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <netinet/in.h>
 
 int
 main (void)
 {
  struct sockaddr_in6 s; s.sin6_family = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_sockaddr_in6="yes"
 else $as_nop
    ac_cv_have_struct_sockaddr_in6="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_sockaddr_in6" >&5
 printf "%s\n" "$ac_cv_have_struct_sockaddr_in6" >&6; }
 if test "x$ac_cv_have_struct_sockaddr_in6" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_IN6 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct in6_addr" >&5
 printf %s "checking for struct in6_addr... " >&6; }
 if test ${ac_cv_have_struct_in6_addr+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <netinet/in.h>
 
 int
 main (void)
 {
  struct in6_addr s; s.s6_addr[0] = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_in6_addr="yes"
 else $as_nop
    ac_cv_have_struct_in6_addr="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_in6_addr" >&5
 printf "%s\n" "$ac_cv_have_struct_in6_addr" >&6; }
 if test "x$ac_cv_have_struct_in6_addr" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_IN6_ADDR 1" >>confdefs.h
 
 
 	ac_fn_c_check_member "$LINENO" "struct sockaddr_in6" "sin6_scope_id" "ac_cv_member_struct_sockaddr_in6_sin6_scope_id" "
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #include <netinet/in.h>
 
 "
 if test "x$ac_cv_member_struct_sockaddr_in6_sin6_scope_id" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID 1" >>confdefs.h
 
 
 fi
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct addrinfo" >&5
 printf %s "checking for struct addrinfo... " >&6; }
 if test ${ac_cv_have_struct_addrinfo+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 
 int
 main (void)
 {
  struct addrinfo s; s.ai_flags = AI_PASSIVE;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_addrinfo="yes"
 else $as_nop
    ac_cv_have_struct_addrinfo="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_addrinfo" >&5
 printf "%s\n" "$ac_cv_have_struct_addrinfo" >&6; }
 if test "x$ac_cv_have_struct_addrinfo" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_ADDRINFO 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timeval" >&5
 printf %s "checking for struct timeval... " >&6; }
 if test ${ac_cv_have_struct_timeval+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <sys/time.h>
 int
 main (void)
 {
  struct timeval tv; tv.tv_sec = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_timeval="yes"
 else $as_nop
    ac_cv_have_struct_timeval="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_timeval" >&5
 printf "%s\n" "$ac_cv_have_struct_timeval" >&6; }
 if test "x$ac_cv_have_struct_timeval" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_TIMEVAL 1" >>confdefs.h
 
 	have_struct_timeval=1
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for struct timespec" >&5
 printf %s "checking for struct timespec... " >&6; }
 if test ${ac_cv_have_struct_timespec+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
     #ifdef HAVE_SYS_TIME_H
     # include <sys/time.h>
     #endif
     #ifdef HAVE_TIME_H
     # include <time.h>
     #endif
 
 int
 main (void)
 {
  struct timespec ts; ts.tv_sec = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_struct_timespec="yes"
 else $as_nop
    ac_cv_have_struct_timespec="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_struct_timespec" >&5
 printf "%s\n" "$ac_cv_have_struct_timespec" >&6; }
 if test "x$ac_cv_have_struct_timespec" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_STRUCT_TIMESPEC 1" >>confdefs.h
 
 	have_struct_timespec=1
 fi
 
 # We need int64_t or else certain parts of the compile will fail.
 if test "x$ac_cv_have_int64_t" = "xno" && \
 	test "x$ac_cv_sizeof_long_int" != "x8" && \
 	test "x$ac_cv_sizeof_long_long_int" = "x0" ; then
 	echo "OpenSSH requires int64_t support.  Contact your vendor or install"
 	echo "an alternative compiler (I.E., GCC) before continuing."
 	echo ""
 	exit 1;
 else
 	if test "$cross_compiling" = yes
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Assuming working snprintf()" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Assuming working snprintf()" >&2;}
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_SNPRINTF
 int main(void)
 {
 	char buf[50];
 	char expected_out[50];
 	int mazsize = 50 ;
 #if (SIZEOF_LONG_INT == 8)
 	long int num = 0x7fffffffffffffff;
 #else
 	long long num = 0x7fffffffffffffffll;
 #endif
 	strcpy(expected_out, "9223372036854775807");
 	snprintf(buf, mazsize, "%lld", num);
 	if(strcmp(buf, expected_out) != 0)
 		exit(1);
 	exit(0);
 }
 #else
 int main(void) { exit(0); }
 #endif
 
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    true
 else $as_nop
    printf "%s\n" "#define BROKEN_SNPRINTF 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
 
 
 # look for field 'ut_host' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_host
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_host field in utmp.h" >&5
 printf %s "checking for ut_host field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_host" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_HOST_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_host' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_host
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_host field in utmpx.h" >&5
 printf %s "checking for ut_host field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_host" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_HOST_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'syslen' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"syslen
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for syslen field in utmpx.h" >&5
 printf %s "checking for syslen field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "syslen" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_SYSLEN_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_pid' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_pid
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_pid field in utmp.h" >&5
 printf %s "checking for ut_pid field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_pid" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_PID_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_type' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_type
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_type field in utmp.h" >&5
 printf %s "checking for ut_type field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_type" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TYPE_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_type' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_type
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_type field in utmpx.h" >&5
 printf %s "checking for ut_type field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_type" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TYPE_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_tv' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_tv
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_tv field in utmp.h" >&5
 printf %s "checking for ut_tv field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_tv" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TV_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_id' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_id
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_id field in utmp.h" >&5
 printf %s "checking for ut_id field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_id" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ID_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_id' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_id
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_id field in utmpx.h" >&5
 printf %s "checking for ut_id field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_id" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ID_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_addr' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_addr
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_addr field in utmp.h" >&5
 printf %s "checking for ut_addr field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_addr" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ADDR_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_addr' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_addr
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_addr field in utmpx.h" >&5
 printf %s "checking for ut_addr field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_addr" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ADDR_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_addr_v6' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_addr_v6
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_addr_v6 field in utmp.h" >&5
 printf %s "checking for ut_addr_v6 field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_addr_v6" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ADDR_V6_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_addr_v6' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_addr_v6
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_addr_v6 field in utmpx.h" >&5
 printf %s "checking for ut_addr_v6 field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_addr_v6" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_ADDR_V6_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_exit' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_exit
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_exit field in utmp.h" >&5
 printf %s "checking for ut_exit field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_exit" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_EXIT_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_time' in header 'utmp.h'
 		ossh_safe=`echo "utmp.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_time
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_time field in utmp.h" >&5
 printf %s "checking for ut_time field in utmp.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmp.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_time" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TIME_IN_UTMP 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_time' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_time
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_time field in utmpx.h" >&5
 printf %s "checking for ut_time field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_time" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TIME_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_tv' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_tv
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_tv field in utmpx.h" >&5
 printf %s "checking for ut_tv field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_tv" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_TV_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 # look for field 'ut_ss' in header 'utmpx.h'
 		ossh_safe=`echo "utmpx.h" | sed 'y%./+-%__p_%'`
 		ossh_varname="ossh_cv_$ossh_safe""_has_"ut_ss
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ut_ss field in utmpx.h" >&5
 printf %s "checking for ut_ss field in utmpx.h... " >&6; }
 	if eval test \${$ossh_varname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <utmpx.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
   $EGREP "ut_ss" >/dev/null 2>&1
 then :
    			eval "$ossh_varname=yes"
 else $as_nop
    			eval "$ossh_varname=no"
 fi
 rm -rf conftest*
 
 fi
 
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ossh_result" >&5
 printf "%s\n" "$ossh_result" >&6; }
 		if test "x$ossh_result" = "xyes"; then
 
 printf "%s\n" "#define HAVE_SS_IN_UTMPX 1" >>confdefs.h
 
 		fi
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_blksize" "ac_cv_member_struct_stat_st_blksize" "$ac_includes_default"
 if test "x$ac_cv_member_struct_stat_st_blksize" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_STAT_ST_BLKSIZE 1" >>confdefs.h
 
 
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_mtim" "ac_cv_member_struct_stat_st_mtim" "$ac_includes_default"
 if test "x$ac_cv_member_struct_stat_st_mtim" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_STAT_ST_MTIM 1" >>confdefs.h
 
 
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_mtime" "ac_cv_member_struct_stat_st_mtime" "$ac_includes_default"
 if test "x$ac_cv_member_struct_stat_st_mtime" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_STAT_ST_MTIME 1" >>confdefs.h
 
 
 fi
 
 ac_fn_c_check_member "$LINENO" "struct passwd" "pw_gecos" "ac_cv_member_struct_passwd_pw_gecos" "
 #include <sys/types.h>
 #include <pwd.h>
 
 "
 if test "x$ac_cv_member_struct_passwd_pw_gecos" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_PASSWD_PW_GECOS 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_member "$LINENO" "struct passwd" "pw_class" "ac_cv_member_struct_passwd_pw_class" "
 #include <sys/types.h>
 #include <pwd.h>
 
 "
 if test "x$ac_cv_member_struct_passwd_pw_class" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_PASSWD_PW_CLASS 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_member "$LINENO" "struct passwd" "pw_change" "ac_cv_member_struct_passwd_pw_change" "
 #include <sys/types.h>
 #include <pwd.h>
 
 "
 if test "x$ac_cv_member_struct_passwd_pw_change" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_PASSWD_PW_CHANGE 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_member "$LINENO" "struct passwd" "pw_expire" "ac_cv_member_struct_passwd_pw_expire" "
 #include <sys/types.h>
 #include <pwd.h>
 
 "
 if test "x$ac_cv_member_struct_passwd_pw_expire" = xyes
 then :
 
 printf "%s\n" "#define HAVE_STRUCT_PASSWD_PW_EXPIRE 1" >>confdefs.h
 
 
 fi
 
 
 ac_fn_c_check_member "$LINENO" "struct __res_state" "retrans" "ac_cv_member_struct___res_state_retrans" "
 #include <stdio.h>
 #if HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>
 
 "
 if test "x$ac_cv_member_struct___res_state_retrans" = xyes
 then :
 
 else $as_nop
 
 printf "%s\n" "#define __res_state state" >>confdefs.h
 
 fi
 
 
 ac_fn_c_check_member "$LINENO" "struct sockaddr_in" "sin_len" "ac_cv_member_struct_sockaddr_in_sin_len" "
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 
 
 "
 if test "x$ac_cv_member_struct_sockaddr_in_sin_len" = xyes
 then :
 
 printf "%s\n" "#define SOCK_HAS_LEN 1" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ss_family field in struct sockaddr_storage" >&5
 printf %s "checking for ss_family field in struct sockaddr_storage... " >&6; }
 if test ${ac_cv_have_ss_family_in_struct_ss+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 
 int
 main (void)
 {
  struct sockaddr_storage s; s.ss_family = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_ss_family_in_struct_ss="yes"
 else $as_nop
    ac_cv_have_ss_family_in_struct_ss="no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_ss_family_in_struct_ss" >&5
 printf "%s\n" "$ac_cv_have_ss_family_in_struct_ss" >&6; }
 if test "x$ac_cv_have_ss_family_in_struct_ss" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SS_FAMILY_IN_SS 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for __ss_family field in struct sockaddr_storage" >&5
 printf %s "checking for __ss_family field in struct sockaddr_storage... " >&6; }
 if test ${ac_cv_have___ss_family_in_struct_ss+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 
 int
 main (void)
 {
  struct sockaddr_storage s; s.__ss_family = 1;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have___ss_family_in_struct_ss="yes"
 else $as_nop
    ac_cv_have___ss_family_in_struct_ss="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have___ss_family_in_struct_ss" >&5
 printf "%s\n" "$ac_cv_have___ss_family_in_struct_ss" >&6; }
 if test "x$ac_cv_have___ss_family_in_struct_ss" = "xyes" ; then
 
 printf "%s\n" "#define HAVE___SS_FAMILY_IN_SS 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for msg_accrights field in struct msghdr" >&5
 printf %s "checking for msg_accrights field in struct msghdr... " >&6; }
 if test ${ac_cv_have_accrights_in_msghdr+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 #ifdef msg_accrights
 #error "msg_accrights is a macro"
 exit(1);
 #endif
 struct msghdr m;
 m.msg_accrights = 0;
 exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_accrights_in_msghdr="yes"
 else $as_nop
    ac_cv_have_accrights_in_msghdr="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_accrights_in_msghdr" >&5
 printf "%s\n" "$ac_cv_have_accrights_in_msghdr" >&6; }
 if test "x$ac_cv_have_accrights_in_msghdr" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_ACCRIGHTS_IN_MSGHDR 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if struct statvfs.f_fsid is integral type" >&5
 printf %s "checking if struct statvfs.f_fsid is integral type... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/param.h>
 #include <sys/stat.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 
 int
 main (void)
 {
  struct statvfs s; s.f_fsid = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if fsid_t has member val" >&5
 printf %s "checking if fsid_t has member val... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/statvfs.h>
 
 int
 main (void)
 {
  fsid_t t; t.val[0] = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define FSID_HAS_VAL 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if f_fsid has member __val" >&5
 printf %s "checking if f_fsid has member __val... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/statvfs.h>
 
 int
 main (void)
 {
  fsid_t t; t.__val[0] = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define FSID_HAS___VAL 1" >>confdefs.h
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for msg_control field in struct msghdr" >&5
 printf %s "checking for msg_control field in struct msghdr... " >&6; }
 if test ${ac_cv_have_control_in_msghdr+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <stdlib.h>
 
 int
 main (void)
 {
 
 #ifdef msg_control
 #error "msg_control is a macro"
 exit(1);
 #endif
 struct msghdr m;
 m.msg_control = 0;
 exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    ac_cv_have_control_in_msghdr="yes"
 else $as_nop
    ac_cv_have_control_in_msghdr="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_control_in_msghdr" >&5
 printf "%s\n" "$ac_cv_have_control_in_msghdr" >&6; }
 if test "x$ac_cv_have_control_in_msghdr" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_CONTROL_IN_MSGHDR 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libc defines __progname" >&5
 printf %s "checking if libc defines __progname... " >&6; }
 if test ${ac_cv_libc_defines___progname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdio.h>
 int
 main (void)
 {
  extern char *__progname; printf("%s", __progname);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_libc_defines___progname="yes"
 else $as_nop
    ac_cv_libc_defines___progname="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_libc_defines___progname" >&5
 printf "%s\n" "$ac_cv_libc_defines___progname" >&6; }
 if test "x$ac_cv_libc_defines___progname" = "xyes" ; then
 
 printf "%s\n" "#define HAVE___PROGNAME 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC implements __FUNCTION__" >&5
 printf %s "checking whether $CC implements __FUNCTION__... " >&6; }
 if test ${ac_cv_cc_implements___FUNCTION__+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdio.h>
 int
 main (void)
 {
  printf("%s", __FUNCTION__);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_cc_implements___FUNCTION__="yes"
 else $as_nop
    ac_cv_cc_implements___FUNCTION__="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cc_implements___FUNCTION__" >&5
 printf "%s\n" "$ac_cv_cc_implements___FUNCTION__" >&6; }
 if test "x$ac_cv_cc_implements___FUNCTION__" = "xyes" ; then
 
 printf "%s\n" "#define HAVE___FUNCTION__ 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC implements __func__" >&5
 printf %s "checking whether $CC implements __func__... " >&6; }
 if test ${ac_cv_cc_implements___func__+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdio.h>
 int
 main (void)
 {
  printf("%s", __func__);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_cc_implements___func__="yes"
 else $as_nop
    ac_cv_cc_implements___func__="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cc_implements___func__" >&5
 printf "%s\n" "$ac_cv_cc_implements___func__" >&6; }
 if test "x$ac_cv_cc_implements___func__" = "xyes" ; then
 
 printf "%s\n" "#define HAVE___func__ 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether va_copy exists" >&5
 printf %s "checking whether va_copy exists... " >&6; }
 if test ${ac_cv_have_va_copy+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdarg.h>
 va_list x,y;
 
 int
 main (void)
 {
  va_copy(x,y);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_have_va_copy="yes"
 else $as_nop
    ac_cv_have_va_copy="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_va_copy" >&5
 printf "%s\n" "$ac_cv_have_va_copy" >&6; }
 if test "x$ac_cv_have_va_copy" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_VA_COPY 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether __va_copy exists" >&5
 printf %s "checking whether __va_copy exists... " >&6; }
 if test ${ac_cv_have___va_copy+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdarg.h>
 va_list x,y;
 
 int
 main (void)
 {
  __va_copy(x,y);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_have___va_copy="yes"
 else $as_nop
    ac_cv_have___va_copy="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have___va_copy" >&5
 printf "%s\n" "$ac_cv_have___va_copy" >&6; }
 if test "x$ac_cv_have___va_copy" = "xyes" ; then
 
 printf "%s\n" "#define HAVE___VA_COPY 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether getopt has optreset support" >&5
 printf %s "checking whether getopt has optreset support... " >&6; }
 if test ${ac_cv_have_getopt_optreset+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <getopt.h>
 int
 main (void)
 {
  extern int optreset; optreset = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_have_getopt_optreset="yes"
 else $as_nop
    ac_cv_have_getopt_optreset="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_getopt_optreset" >&5
 printf "%s\n" "$ac_cv_have_getopt_optreset" >&6; }
 if test "x$ac_cv_have_getopt_optreset" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_GETOPT_OPTRESET 1" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libc defines sys_errlist" >&5
 printf %s "checking if libc defines sys_errlist... " >&6; }
 if test ${ac_cv_libc_defines_sys_errlist+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdio.h>
 int
 main (void)
 {
  extern const char *const sys_errlist[]; printf("%s", sys_errlist[0]);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_libc_defines_sys_errlist="yes"
 else $as_nop
    ac_cv_libc_defines_sys_errlist="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_libc_defines_sys_errlist" >&5
 printf "%s\n" "$ac_cv_libc_defines_sys_errlist" >&6; }
 if test "x$ac_cv_libc_defines_sys_errlist" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SYS_ERRLIST 1" >>confdefs.h
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libc defines sys_nerr" >&5
 printf %s "checking if libc defines sys_nerr... " >&6; }
 if test ${ac_cv_libc_defines_sys_nerr+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
 
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <stdio.h>
 int
 main (void)
 {
  extern int sys_nerr; printf("%i", sys_nerr);
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
    ac_cv_libc_defines_sys_nerr="yes"
 else $as_nop
    ac_cv_libc_defines_sys_nerr="no"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_libc_defines_sys_nerr" >&5
 printf "%s\n" "$ac_cv_libc_defines_sys_nerr" >&6; }
 if test "x$ac_cv_libc_defines_sys_nerr" = "xyes" ; then
 
 printf "%s\n" "#define HAVE_SYS_NERR 1" >>confdefs.h
 
 fi
 
 # Check libraries needed by DNS fingerprint support
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing getrrsetbyname" >&5
 printf %s "checking for library containing getrrsetbyname... " >&6; }
 if test ${ac_cv_search_getrrsetbyname+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char getrrsetbyname ();
 int
 main (void)
 {
 return getrrsetbyname ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_getrrsetbyname=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_getrrsetbyname+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_getrrsetbyname+y}
 then :
 
 else $as_nop
   ac_cv_search_getrrsetbyname=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_getrrsetbyname" >&5
 printf "%s\n" "$ac_cv_search_getrrsetbyname" >&6; }
 ac_res=$ac_cv_search_getrrsetbyname
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 printf "%s\n" "#define HAVE_GETRRSETBYNAME 1" >>confdefs.h
 
 else $as_nop
 
 		# Needed by our getrrsetbyname()
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing res_query" >&5
 printf %s "checking for library containing res_query... " >&6; }
 if test ${ac_cv_search_res_query+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char res_query ();
 int
 main (void)
 {
 return res_query ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_res_query=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_res_query+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_res_query+y}
 then :
 
 else $as_nop
   ac_cv_search_res_query=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_res_query" >&5
 printf "%s\n" "$ac_cv_search_res_query" >&6; }
 ac_res=$ac_cv_search_res_query
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing dn_expand" >&5
 printf %s "checking for library containing dn_expand... " >&6; }
 if test ${ac_cv_search_dn_expand+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dn_expand ();
 int
 main (void)
 {
 return dn_expand ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_dn_expand=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_dn_expand+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_dn_expand+y}
 then :
 
 else $as_nop
   ac_cv_search_dn_expand=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dn_expand" >&5
 printf "%s\n" "$ac_cv_search_dn_expand" >&6; }
 ac_res=$ac_cv_search_dn_expand
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if res_query will link" >&5
 printf %s "checking if res_query will link... " >&6; }
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <netdb.h>
 #include <resolv.h>
 
 int
 main (void)
 {
 
 	res_query (0, 0, 0, 0, 0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		    saved_LIBS="$LIBS"
 		    LIBS="$LIBS -lresolv"
 		    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for res_query in -lresolv" >&5
 printf %s "checking for res_query in -lresolv... " >&6; }
 		    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <netdb.h>
 #include <resolv.h>
 
 int
 main (void)
 {
 
 	res_query (0, 0, 0, 0, 0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
   LIBS="$saved_LIBS"
 			 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 		ac_fn_c_check_func "$LINENO" "_getshort" "ac_cv_func__getshort"
 if test "x$ac_cv_func__getshort" = xyes
 then :
   printf "%s\n" "#define HAVE__GETSHORT 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "_getlong" "ac_cv_func__getlong"
 if test "x$ac_cv_func__getlong" = xyes
 then :
   printf "%s\n" "#define HAVE__GETLONG 1" >>confdefs.h
 
 fi
 
 		ac_fn_check_decl "$LINENO" "_getshort" "ac_cv_have_decl__getshort" "#include <sys/types.h>
 		    #include <arpa/nameser.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl__getshort" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL__GETSHORT $ac_have_decl" >>confdefs.h
 ac_fn_check_decl "$LINENO" "_getlong" "ac_cv_have_decl__getlong" "#include <sys/types.h>
 		    #include <arpa/nameser.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl__getlong" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL__GETLONG $ac_have_decl" >>confdefs.h
 
 		ac_fn_c_check_member "$LINENO" "HEADER" "ad" "ac_cv_member_HEADER_ad" "#include <arpa/nameser.h>
 "
 if test "x$ac_cv_member_HEADER_ad" = xyes
 then :
 
 printf "%s\n" "#define HAVE_HEADER_AD 1" >>confdefs.h
 
 fi
 
 
 fi
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if struct __res_state _res is an extern" >&5
 printf %s "checking if struct __res_state _res is an extern... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #if HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>
 extern struct __res_state _res;
 
 int
 main (void)
 {
 
 struct __res_state *volatile p = &_res;  /* force resolution of _res */
 return 0;
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HAVE__RES_EXTERN 1" >>confdefs.h
 
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 # Check whether user wants SELinux support
 SELINUX_MSG="no"
 LIBSELINUX=""
 
 # Check whether --with-selinux was given.
 if test ${with_selinux+y}
 then :
   withval=$with_selinux;  if test "x$withval" != "xno" ; then
 		save_LIBS="$LIBS"
 
 printf "%s\n" "#define WITH_SELINUX 1" >>confdefs.h
 
 		SELINUX_MSG="yes"
 		ac_fn_c_check_header_compile "$LINENO" "selinux/selinux.h" "ac_cv_header_selinux_selinux_h" "$ac_includes_default"
 if test "x$ac_cv_header_selinux_selinux_h" = xyes
 then :
 
 else $as_nop
   as_fn_error $? "SELinux support requires selinux.h header" "$LINENO" 5
 fi
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for setexeccon in -lselinux" >&5
 printf %s "checking for setexeccon in -lselinux... " >&6; }
 if test ${ac_cv_lib_selinux_setexeccon+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lselinux  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char setexeccon ();
 int
 main (void)
 {
 return setexeccon ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_selinux_setexeccon=yes
 else $as_nop
   ac_cv_lib_selinux_setexeccon=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_selinux_setexeccon" >&5
 printf "%s\n" "$ac_cv_lib_selinux_setexeccon" >&6; }
 if test "x$ac_cv_lib_selinux_setexeccon" = xyes
 then :
    LIBSELINUX="-lselinux"
 			  LIBS="$LIBS -lselinux"
 
 else $as_nop
   as_fn_error $? "SELinux support requires libselinux library" "$LINENO" 5
 fi
 
 		ac_fn_c_check_func "$LINENO" "getseuserbyname" "ac_cv_func_getseuserbyname"
 if test "x$ac_cv_func_getseuserbyname" = xyes
 then :
   printf "%s\n" "#define HAVE_GETSEUSERBYNAME 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "get_default_context_with_level" "ac_cv_func_get_default_context_with_level"
 if test "x$ac_cv_func_get_default_context_with_level" = xyes
 then :
   printf "%s\n" "#define HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL 1" >>confdefs.h
 
 fi
 
 		LIBS="$save_LIBS $LIBSELINUX"
 	fi
 
 fi
 
 
 
 # Check whether user wants Kerberos 5 support
 KRB5_MSG="no"
 
 # Check whether --with-kerberos5 was given.
 if test ${with_kerberos5+y}
 then :
   withval=$with_kerberos5;  if test "x$withval" != "xno" ; then
 		if test "x$withval" = "xyes" ; then
 			KRB5ROOT="/usr/local"
 		else
 			KRB5ROOT=${withval}
 		fi
 
 
 printf "%s\n" "#define KRB5 1" >>confdefs.h
 
 		KRB5_MSG="yes"
 
 		use_pkgconfig_for_krb5=
 		if test "x$PKGCONFIG" != "xno"; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $PKGCONFIG knows about kerberos5" >&5
 printf %s "checking if $PKGCONFIG knows about kerberos5... " >&6; }
 			if "$PKGCONFIG" krb5; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 				use_pkgconfig_for_krb5=yes
 			else
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			fi
 		fi
 		if test "x$use_pkgconfig_for_krb5" = "xyes"; then
 			K5CFLAGS=`$PKGCONFIG --cflags krb5`
 			K5LIBS=`$PKGCONFIG --libs krb5`
 			CPPFLAGS="$CPPFLAGS $K5CFLAGS"
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gssapi support" >&5
 printf %s "checking for gssapi support... " >&6; }
 			if "$PKGCONFIG" krb5-gssapi; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define GSSAPI 1" >>confdefs.h
 
 				GSSCFLAGS="`$PKGCONFIG --cflags krb5-gssapi`"
 				GSSLIBS="`$PKGCONFIG --libs krb5-gssapi`"
 				CPPFLAGS="$CPPFLAGS $GSSCFLAGS"
 			else
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			fi
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are using Heimdal" >&5
 printf %s "checking whether we are using Heimdal... " >&6; }
 			cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <krb5.h>
 
 int
 main (void)
 {
  char *tmp = heimdal_version;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HEIMDAL 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 		else
 			if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}krb5-config", so it can be a program name with args.
 set dummy ${ac_tool_prefix}krb5-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_KRB5CONF+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $KRB5CONF in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_KRB5CONF="$KRB5CONF" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_dummy="$KRB5ROOT/bin:$PATH"
 for as_dir in $as_dummy
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_KRB5CONF="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 KRB5CONF=$ac_cv_path_KRB5CONF
 if test -n "$KRB5CONF"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $KRB5CONF" >&5
 printf "%s\n" "$KRB5CONF" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 fi
 if test -z "$ac_cv_path_KRB5CONF"; then
   ac_pt_KRB5CONF=$KRB5CONF
   # Extract the first word of "krb5-config", so it can be a program name with args.
 set dummy krb5-config; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_ac_pt_KRB5CONF+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $ac_pt_KRB5CONF in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ac_pt_KRB5CONF="$ac_pt_KRB5CONF" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_dummy="$KRB5ROOT/bin:$PATH"
 for as_dir in $as_dummy
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_ac_pt_KRB5CONF="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 ac_pt_KRB5CONF=$ac_cv_path_ac_pt_KRB5CONF
 if test -n "$ac_pt_KRB5CONF"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_KRB5CONF" >&5
 printf "%s\n" "$ac_pt_KRB5CONF" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_pt_KRB5CONF" = x; then
     KRB5CONF="$KRB5ROOT/bin/krb5-config"
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
 printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     KRB5CONF=$ac_pt_KRB5CONF
   fi
 else
   KRB5CONF="$ac_cv_path_KRB5CONF"
 fi
 
 			if test -x $KRB5CONF ; then
 				K5CFLAGS="`$KRB5CONF --cflags`"
 				K5LIBS="`$KRB5CONF --libs`"
 				CPPFLAGS="$CPPFLAGS $K5CFLAGS"
 
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gssapi support" >&5
 printf %s "checking for gssapi support... " >&6; }
 				if $KRB5CONF | grep gssapi >/dev/null ; then
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define GSSAPI 1" >>confdefs.h
 
 					GSSCFLAGS="`$KRB5CONF --cflags gssapi`"
 					GSSLIBS="`$KRB5CONF --libs gssapi`"
 					CPPFLAGS="$CPPFLAGS $GSSCFLAGS"
 				else
 					{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 				fi
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are using Heimdal" >&5
 printf %s "checking whether we are using Heimdal... " >&6; }
 				cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <krb5.h>
 
 int
 main (void)
 {
  char *tmp = heimdal_version;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HEIMDAL 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 			else
 				CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include"
 				LDFLAGS="$LDFLAGS -L${KRB5ROOT}/lib"
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are using Heimdal" >&5
 printf %s "checking whether we are using Heimdal... " >&6; }
 				cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
  #include <krb5.h>
 
 int
 main (void)
 {
  char *tmp = heimdal_version;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 						 printf "%s\n" "#define HEIMDAL 1" >>confdefs.h
 
 						 K5LIBS="-lkrb5"
 						 K5LIBS="$K5LIBS -lcom_err -lasn1"
 						 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for net_write in -lroken" >&5
 printf %s "checking for net_write in -lroken... " >&6; }
 if test ${ac_cv_lib_roken_net_write+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lroken  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char net_write ();
 int
 main (void)
 {
 return net_write ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_roken_net_write=yes
 else $as_nop
   ac_cv_lib_roken_net_write=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_roken_net_write" >&5
 printf "%s\n" "$ac_cv_lib_roken_net_write" >&6; }
 if test "x$ac_cv_lib_roken_net_write" = xyes
 then :
   K5LIBS="$K5LIBS -lroken"
 fi
 
 						 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for des_cbc_encrypt in -ldes" >&5
 printf %s "checking for des_cbc_encrypt in -ldes... " >&6; }
 if test ${ac_cv_lib_des_des_cbc_encrypt+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldes  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char des_cbc_encrypt ();
 int
 main (void)
 {
 return des_cbc_encrypt ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_des_des_cbc_encrypt=yes
 else $as_nop
   ac_cv_lib_des_des_cbc_encrypt=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_des_des_cbc_encrypt" >&5
 printf "%s\n" "$ac_cv_lib_des_des_cbc_encrypt" >&6; }
 if test "x$ac_cv_lib_des_des_cbc_encrypt" = xyes
 then :
   K5LIBS="$K5LIBS -ldes"
 fi
 
 
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 						 K5LIBS="-lkrb5 -lk5crypto -lcom_err"
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing dn_expand" >&5
 printf %s "checking for library containing dn_expand... " >&6; }
 if test ${ac_cv_search_dn_expand+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char dn_expand ();
 int
 main (void)
 {
 return dn_expand ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' resolv
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_dn_expand=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_dn_expand+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_dn_expand+y}
 then :
 
 else $as_nop
   ac_cv_search_dn_expand=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dn_expand" >&5
 printf "%s\n" "$ac_cv_search_dn_expand" >&6; }
 ac_res=$ac_cv_search_dn_expand
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gss_init_sec_context in -lgssapi_krb5" >&5
 printf %s "checking for gss_init_sec_context in -lgssapi_krb5... " >&6; }
 if test ${ac_cv_lib_gssapi_krb5_gss_init_sec_context+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lgssapi_krb5  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char gss_init_sec_context ();
 int
 main (void)
 {
 return gss_init_sec_context ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_gssapi_krb5_gss_init_sec_context=yes
 else $as_nop
   ac_cv_lib_gssapi_krb5_gss_init_sec_context=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gssapi_krb5_gss_init_sec_context" >&5
 printf "%s\n" "$ac_cv_lib_gssapi_krb5_gss_init_sec_context" >&6; }
 if test "x$ac_cv_lib_gssapi_krb5_gss_init_sec_context" = xyes
 then :
    printf "%s\n" "#define GSSAPI 1" >>confdefs.h
 
 					  GSSLIBS="-lgssapi_krb5"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gss_init_sec_context in -lgssapi" >&5
 printf %s "checking for gss_init_sec_context in -lgssapi... " >&6; }
 if test ${ac_cv_lib_gssapi_gss_init_sec_context+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lgssapi  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char gss_init_sec_context ();
 int
 main (void)
 {
 return gss_init_sec_context ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_gssapi_gss_init_sec_context=yes
 else $as_nop
   ac_cv_lib_gssapi_gss_init_sec_context=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gssapi_gss_init_sec_context" >&5
 printf "%s\n" "$ac_cv_lib_gssapi_gss_init_sec_context" >&6; }
 if test "x$ac_cv_lib_gssapi_gss_init_sec_context" = xyes
 then :
    printf "%s\n" "#define GSSAPI 1" >>confdefs.h
 
 						  GSSLIBS="-lgssapi"
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gss_init_sec_context in -lgss" >&5
 printf %s "checking for gss_init_sec_context in -lgss... " >&6; }
 if test ${ac_cv_lib_gss_gss_init_sec_context+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lgss  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char gss_init_sec_context ();
 int
 main (void)
 {
 return gss_init_sec_context ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_gss_gss_init_sec_context=yes
 else $as_nop
   ac_cv_lib_gss_gss_init_sec_context=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gss_gss_init_sec_context" >&5
 printf "%s\n" "$ac_cv_lib_gss_gss_init_sec_context" >&6; }
 if test "x$ac_cv_lib_gss_gss_init_sec_context" = xyes
 then :
    printf "%s\n" "#define GSSAPI 1" >>confdefs.h
 
 							  GSSLIBS="-lgss"
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Cannot find any suitable gss-api library - build may fail" >&5
 printf "%s\n" "$as_me: WARNING: Cannot find any suitable gss-api library - build may fail" >&2;}
 fi
 
 
 fi
 
 
 fi
 
 
 				ac_fn_c_check_header_compile "$LINENO" "gssapi.h" "ac_cv_header_gssapi_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_h" = xyes
 then :
 
 else $as_nop
    unset ac_cv_header_gssapi_h
 					  CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
 					         for ac_header in gssapi.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "gssapi.h" "ac_cv_header_gssapi_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_H 1" >>confdefs.h
 
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Cannot find any suitable gss-api header - build may fail" >&5
 printf "%s\n" "$as_me: WARNING: Cannot find any suitable gss-api header - build may fail" >&2;}
 
 fi
 
 done
 
 
 fi
 
 
 				oldCPP="$CPPFLAGS"
 				CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
 				ac_fn_c_check_header_compile "$LINENO" "gssapi_krb5.h" "ac_cv_header_gssapi_krb5_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_krb5_h" = xyes
 then :
 
 else $as_nop
    CPPFLAGS="$oldCPP"
 fi
 
 
 			fi
 		fi
 		if test -n "${rpath_opt}" ; then
 			LDFLAGS="$LDFLAGS ${rpath_opt}${KRB5ROOT}/lib"
 		fi
 		if test ! -z "$blibpath" ; then
 			blibpath="$blibpath:${KRB5ROOT}/lib"
 		fi
 
 		ac_fn_c_check_header_compile "$LINENO" "gssapi.h" "ac_cv_header_gssapi_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "gssapi/gssapi.h" "ac_cv_header_gssapi_gssapi_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_gssapi_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_GSSAPI_H 1" >>confdefs.h
 
 fi
 
 		ac_fn_c_check_header_compile "$LINENO" "gssapi_krb5.h" "ac_cv_header_gssapi_krb5_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_krb5_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_KRB5_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "gssapi/gssapi_krb5.h" "ac_cv_header_gssapi_gssapi_krb5_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_gssapi_krb5_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_GSSAPI_KRB5_H 1" >>confdefs.h
 
 fi
 
 		ac_fn_c_check_header_compile "$LINENO" "gssapi_generic.h" "ac_cv_header_gssapi_generic_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_generic_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_GENERIC_H 1" >>confdefs.h
 
 fi
 ac_fn_c_check_header_compile "$LINENO" "gssapi/gssapi_generic.h" "ac_cv_header_gssapi_gssapi_generic_h" "$ac_includes_default"
 if test "x$ac_cv_header_gssapi_gssapi_generic_h" = xyes
 then :
   printf "%s\n" "#define HAVE_GSSAPI_GSSAPI_GENERIC_H 1" >>confdefs.h
 
 fi
 
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing k_hasafs" >&5
 printf %s "checking for library containing k_hasafs... " >&6; }
 if test ${ac_cv_search_k_hasafs+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
 char k_hasafs ();
 int
 main (void)
 {
 return k_hasafs ();
   ;
   return 0;
 }
 _ACEOF
 for ac_lib in '' kafs
 do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
   if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_search_k_hasafs=$ac_res
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
   if test ${ac_cv_search_k_hasafs+y}
 then :
   break
 fi
 done
 if test ${ac_cv_search_k_hasafs+y}
 then :
 
 else $as_nop
   ac_cv_search_k_hasafs=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_k_hasafs" >&5
 printf "%s\n" "$ac_cv_search_k_hasafs" >&6; }
 ac_res=$ac_cv_search_k_hasafs
 if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 printf "%s\n" "#define USE_AFS 1" >>confdefs.h
 
 fi
 
 
 		ac_fn_check_decl "$LINENO" "GSS_C_NT_HOSTBASED_SERVICE" "ac_cv_have_decl_GSS_C_NT_HOSTBASED_SERVICE" "
 #ifdef HAVE_GSSAPI_H
 # include <gssapi.h>
 #elif defined(HAVE_GSSAPI_GSSAPI_H)
 # include <gssapi/gssapi.h>
 #endif
 
 #ifdef HAVE_GSSAPI_GENERIC_H
 # include <gssapi_generic.h>
 #elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
 # include <gssapi/gssapi_generic.h>
 #endif
 
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_GSS_C_NT_HOSTBASED_SERVICE" = xyes
 then :
   ac_have_decl=1
 else $as_nop
   ac_have_decl=0
 fi
 printf "%s\n" "#define HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE $ac_have_decl" >>confdefs.h
 
 		saved_LIBS="$LIBS"
 		LIBS="$LIBS $K5LIBS"
 		ac_fn_c_check_func "$LINENO" "krb5_cc_new_unique" "ac_cv_func_krb5_cc_new_unique"
 if test "x$ac_cv_func_krb5_cc_new_unique" = xyes
 then :
   printf "%s\n" "#define HAVE_KRB5_CC_NEW_UNIQUE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "krb5_get_error_message" "ac_cv_func_krb5_get_error_message"
 if test "x$ac_cv_func_krb5_get_error_message" = xyes
 then :
   printf "%s\n" "#define HAVE_KRB5_GET_ERROR_MESSAGE 1" >>confdefs.h
 
 fi
 ac_fn_c_check_func "$LINENO" "krb5_free_error_message" "ac_cv_func_krb5_free_error_message"
 if test "x$ac_cv_func_krb5_free_error_message" = xyes
 then :
   printf "%s\n" "#define HAVE_KRB5_FREE_ERROR_MESSAGE 1" >>confdefs.h
 
 fi
 
 		LIBS="$saved_LIBS"
 
 	fi
 
 
 fi
 
 
 
 
 
 # Looking for programs, paths and files
 
 PRIVSEP_PATH=/var/empty
 
 # Check whether --with-privsep-path was given.
 if test ${with_privsep_path+y}
 then :
   withval=$with_privsep_path;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			PRIVSEP_PATH=$withval
 		fi
 
 
 fi
 
 
 
 
 # Check whether --with-xauth was given.
 if test ${with_xauth+y}
 then :
   withval=$with_xauth;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			xauth_path=$withval
 		fi
 
 else $as_nop
 
 		TestPath="$PATH"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/X/bin"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/bin/X11"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/X11R6/bin"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/openwin/bin"
 		# Extract the first word of "xauth", so it can be a program name with args.
 set dummy xauth; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_xauth_path+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $xauth_path in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_xauth_path="$xauth_path" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $TestPath
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_xauth_path="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 xauth_path=$ac_cv_path_xauth_path
 if test -n "$xauth_path"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $xauth_path" >&5
 printf "%s\n" "$xauth_path" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 		if (test ! -z "$xauth_path" && test -x "/usr/openwin/bin/xauth") ; then
 			xauth_path="/usr/openwin/bin/xauth"
 		fi
 
 
 fi
 
 
 STRIP_OPT=-s
 # Check whether --enable-strip was given.
 if test ${enable_strip+y}
 then :
   enableval=$enable_strip;
 		if test "x$enableval" = "xno" ; then
 			STRIP_OPT=
 		fi
 
 
 fi
 
 
 
 if test -z "$xauth_path" ; then
 	XAUTH_PATH="undefined"
 
 else
 
 printf "%s\n" "#define XAUTH_PATH \"$xauth_path\"" >>confdefs.h
 
 	XAUTH_PATH=$xauth_path
 
 fi
 
 # Check for mail directory
 
 # Check whether --with-maildir was given.
 if test ${with_maildir+y}
 then :
   withval=$with_maildir;
 	if test "X$withval" != X  &&  test "x$withval" != xno  &&  \
 	    test "x${withval}" != xyes; then
 
 printf "%s\n" "#define MAIL_DIRECTORY \"$withval\"" >>confdefs.h
 
 	    fi
 
 else $as_nop
 
 	if test "X$maildir" != "X"; then
 	    printf "%s\n" "#define MAIL_DIRECTORY \"$maildir\"" >>confdefs.h
 
 	else
 	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking Discovering system mail directory" >&5
 printf %s "checking Discovering system mail directory... " >&6; }
 	    if test "$cross_compiling" = yes
 then :
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: use --with-maildir=/path/to/mail" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: use --with-maildir=/path/to/mail" >&2;}
 
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #ifdef HAVE_MAILLOCK_H
 #include <maillock.h>
 #endif
 #define DATA "conftest.maildir"
 
 int
 main (void)
 {
 
 	FILE *fd;
 	int rc;
 
 	fd = fopen(DATA,"w");
 	if(fd == NULL)
 		exit(1);
 
 #if defined (_PATH_MAILDIR)
 	if ((rc = fprintf(fd ,"_PATH_MAILDIR:%s\n", _PATH_MAILDIR)) <0)
 		exit(1);
 #elif defined (MAILDIR)
 	if ((rc = fprintf(fd ,"MAILDIR:%s\n", MAILDIR)) <0)
 		exit(1);
 #elif defined (_PATH_MAIL)
 	if ((rc = fprintf(fd ,"_PATH_MAIL:%s\n", _PATH_MAIL)) <0)
 		exit(1);
 #else
 	exit (2);
 #endif
 
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
 
 		    maildir_what=`awk -F: '{print $1}' conftest.maildir`
 		    maildir=`awk -F: '{print $2}' conftest.maildir \
 			| sed 's|/$||'`
 		    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Using: $maildir from $maildir_what" >&5
 printf "%s\n" "Using: $maildir from $maildir_what" >&6; }
 		    if test "x$maildir_what" != "x_PATH_MAILDIR"; then
 			printf "%s\n" "#define MAIL_DIRECTORY \"$maildir\"" >>confdefs.h
 
 		    fi
 
 else $as_nop
 
 		    if test "X$ac_status" = "X2";then
 # our test program didn't find it. Default to /var/spool/mail
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Using: default value of /var/spool/mail" >&5
 printf "%s\n" "Using: default value of /var/spool/mail" >&6; }
 			printf "%s\n" "#define MAIL_DIRECTORY \"/var/spool/mail\"" >>confdefs.h
 
 		     else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: *** not found ***" >&5
 printf "%s\n" "*** not found ***" >&6; }
 		     fi
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 	fi
 
 
 fi
  # maildir
 
 if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes"; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Disabling /dev/ptmx test" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Disabling /dev/ptmx test" >&2;}
 	disable_ptmx_check=yes
 fi
 if test -z "$no_dev_ptmx" ; then
 	if test "x$disable_ptmx_check" != "xyes" ; then
 		as_ac_File=`printf "%s\n" "ac_cv_file_"/dev/ptmx"" | $as_tr_sh`
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for \"/dev/ptmx\"" >&5
 printf %s "checking for \"/dev/ptmx\"... " >&6; }
 if eval test \${$as_ac_File+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   test "$cross_compiling" = yes &&
   as_fn_error $? "cannot check for file existence when cross compiling" "$LINENO" 5
 if test -r ""/dev/ptmx""; then
   eval "$as_ac_File=yes"
 else
   eval "$as_ac_File=no"
 fi
 fi
 eval ac_res=\$$as_ac_File
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
 if eval test \"x\$"$as_ac_File"\" = x"yes"
 then :
 
 
 printf "%s\n" "#define HAVE_DEV_PTMX 1" >>confdefs.h
 
 				have_dev_ptmx=1
 
 
 fi
 
 	fi
 fi
 
 if test ! -z "$cross_compiling" && test "x$cross_compiling" != "xyes"; then
 	as_ac_File=`printf "%s\n" "ac_cv_file_"/dev/ptc"" | $as_tr_sh`
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for \"/dev/ptc\"" >&5
 printf %s "checking for \"/dev/ptc\"... " >&6; }
 if eval test \${$as_ac_File+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   test "$cross_compiling" = yes &&
   as_fn_error $? "cannot check for file existence when cross compiling" "$LINENO" 5
 if test -r ""/dev/ptc""; then
   eval "$as_ac_File=yes"
 else
   eval "$as_ac_File=no"
 fi
 fi
 eval ac_res=\$$as_ac_File
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
 if eval test \"x\$"$as_ac_File"\" = x"yes"
 then :
 
 
 printf "%s\n" "#define HAVE_DEV_PTS_AND_PTC 1" >>confdefs.h
 
 			have_dev_ptc=1
 
 
 fi
 
 else
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: Disabling /dev/ptc test" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: Disabling /dev/ptc test" >&2;}
 fi
 
 # Options from here on. Some of these are preset by platform above
 
 # Check whether --with-mantype was given.
 if test ${with_mantype+y}
 then :
   withval=$with_mantype;
 		case "$withval" in
 		man|cat|doc)
 			MANTYPE=$withval
 			;;
 		*)
 			as_fn_error $? "invalid man type: $withval" "$LINENO" 5
 			;;
 		esac
 
 
 fi
 
 if test -z "$MANTYPE"; then
 	if ${MANDOC} ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=doc
 	elif ${NROFF} -mdoc ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=doc
 	elif ${NROFF} -man ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=man
 	else
 		MANTYPE=cat
 	fi
 fi
 
 if test "$MANTYPE" = "doc"; then
 	mansubdir=man;
 else
 	mansubdir=$MANTYPE;
 fi
 
 
 # Whether to disable shadow password support
 
 # Check whether --with-shadow was given.
 if test ${with_shadow+y}
 then :
   withval=$with_shadow;
 		if test "x$withval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_SHADOW 1" >>confdefs.h
 
 			disable_shadow=yes
 		fi
 
 
 fi
 
 
 if test -z "$disable_shadow" ; then
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if the systems has expire shadow information" >&5
 printf %s "checking if the systems has expire shadow information... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <shadow.h>
 struct spwd sp;
 
 int
 main (void)
 {
  sp.sp_expire = sp.sp_lstchg = sp.sp_inact = 0;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    sp_expire_available=yes
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 	if test "x$sp_expire_available" = "xyes" ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define HAS_SHADOW_EXPIRE 1" >>confdefs.h
 
 	else
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	fi
 fi
 
 # Use ip address instead of hostname in $DISPLAY
 if test ! -z "$IPADDR_IN_DISPLAY" ; then
 	DISPLAY_HACK_MSG="yes"
 
 printf "%s\n" "#define IPADDR_IN_DISPLAY 1" >>confdefs.h
 
 else
 	DISPLAY_HACK_MSG="no"
 
 # Check whether --with-ipaddr-display was given.
 if test ${with_ipaddr_display+y}
 then :
   withval=$with_ipaddr_display;
 			if test "x$withval" != "xno" ; then
 				printf "%s\n" "#define IPADDR_IN_DISPLAY 1" >>confdefs.h
 
 				DISPLAY_HACK_MSG="yes"
 			fi
 
 
 fi
 
 fi
 
 # check for /etc/default/login and use it if present.
 # Check whether --enable-etc-default-login was given.
 if test ${enable_etc_default_login+y}
 then :
   enableval=$enable_etc_default_login;  if test "x$enableval" = "xno"; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: /etc/default/login handling disabled" >&5
 printf "%s\n" "$as_me: /etc/default/login handling disabled" >&6;}
 		etc_default_login=no
 	  else
 		etc_default_login=yes
 	  fi
 else $as_nop
    if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes";
 	  then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cross compiling: not checking /etc/default/login" >&5
 printf "%s\n" "$as_me: WARNING: cross compiling: not checking /etc/default/login" >&2;}
 		etc_default_login=no
 	  else
 		etc_default_login=yes
 	  fi
 
 fi
 
 
 if test "x$etc_default_login" != "xno"; then
 	as_ac_File=`printf "%s\n" "ac_cv_file_"/etc/default/login"" | $as_tr_sh`
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for \"/etc/default/login\"" >&5
 printf %s "checking for \"/etc/default/login\"... " >&6; }
 if eval test \${$as_ac_File+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   test "$cross_compiling" = yes &&
   as_fn_error $? "cannot check for file existence when cross compiling" "$LINENO" 5
 if test -r ""/etc/default/login""; then
   eval "$as_ac_File=yes"
 else
   eval "$as_ac_File=no"
 fi
 fi
 eval ac_res=\$$as_ac_File
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
 if eval test \"x\$"$as_ac_File"\" = x"yes"
 then :
    external_path_file=/etc/default/login
 fi
 
 	if test "x$external_path_file" = "x/etc/default/login"; then
 
 printf "%s\n" "#define HAVE_ETC_DEFAULT_LOGIN 1" >>confdefs.h
 
 	fi
 fi
 
 if test $ac_cv_func_login_getcapbool = "yes" && \
 	test $ac_cv_header_login_cap_h = "yes" ; then
 	external_path_file=/etc/login.conf
 fi
 
 # Whether to mess with the default path
 SERVER_PATH_MSG="(default)"
 
 # Check whether --with-default-path was given.
 if test ${with_default_path+y}
 then :
   withval=$with_default_path;
 		if test "x$external_path_file" = "x/etc/login.conf" ; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING:
 --with-default-path=PATH has no effect on this system.
 Edit /etc/login.conf instead." >&5
 printf "%s\n" "$as_me: WARNING:
 --with-default-path=PATH has no effect on this system.
 Edit /etc/login.conf instead." >&2;}
 		elif test "x$withval" != "xno" ; then
 			if test ! -z "$external_path_file" ; then
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING:
 --with-default-path=PATH will only be used if PATH is not defined in
 $external_path_file ." >&5
 printf "%s\n" "$as_me: WARNING:
 --with-default-path=PATH will only be used if PATH is not defined in
 $external_path_file ." >&2;}
 			fi
 			user_path="$withval"
 			SERVER_PATH_MSG="$withval"
 		fi
 
 else $as_nop
    if test "x$external_path_file" = "x/etc/login.conf" ; then
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Make sure the path to scp is in /etc/login.conf" >&5
 printf "%s\n" "$as_me: WARNING: Make sure the path to scp is in /etc/login.conf" >&2;}
 	else
 		if test ! -z "$external_path_file" ; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING:
 If PATH is defined in $external_path_file, ensure the path to scp is included,
 otherwise scp will not work." >&5
 printf "%s\n" "$as_me: WARNING:
 If PATH is defined in $external_path_file, ensure the path to scp is included,
 otherwise scp will not work." >&2;}
 		fi
 		if test "$cross_compiling" = yes
 then :
    user_path="/usr/bin:/bin:/usr/sbin:/sbin"
 
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* find out what STDPATH is */
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #ifndef _PATH_STDPATH
 # ifdef _PATH_USERPATH	/* Irix */
 #  define _PATH_STDPATH _PATH_USERPATH
 # else
 #  define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
 # endif
 #endif
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #define DATA "conftest.stdpath"
 
 int
 main (void)
 {
 
 	FILE *fd;
 	int rc;
 
 	fd = fopen(DATA,"w");
 	if(fd == NULL)
 		exit(1);
 
 	if ((rc = fprintf(fd,"%s", _PATH_STDPATH)) < 0)
 		exit(1);
 
 	exit(0);
 
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
    user_path=`cat conftest.stdpath`
 else $as_nop
    user_path="/usr/bin:/bin:/usr/sbin:/sbin"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 # make sure $bindir is in USER_PATH so scp will work
 		t_bindir="${bindir}"
 		while echo "${t_bindir}" | egrep '\$\{|NONE/' >/dev/null 2>&1; do
 			t_bindir=`eval echo ${t_bindir}`
 			case $t_bindir in
 				NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$prefix~"` ;;
 			esac
 			case $t_bindir in
 				NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$ac_default_prefix~"` ;;
 			esac
 		done
 		echo $user_path | grep ":$t_bindir"  > /dev/null 2>&1
 		if test $? -ne 0  ; then
 			echo $user_path | grep "^$t_bindir"  > /dev/null 2>&1
 			if test $? -ne 0  ; then
 				user_path=$user_path:$t_bindir
 				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Adding $t_bindir to USER_PATH so scp will work" >&5
 printf "%s\n" "Adding $t_bindir to USER_PATH so scp will work" >&6; }
 			fi
 		fi
 	fi
 
 fi
 
 if test "x$external_path_file" != "x/etc/login.conf" ; then
 
 printf "%s\n" "#define USER_PATH \"$user_path\"" >>confdefs.h
 
 
 fi
 
 # Set superuser path separately to user path
 
 # Check whether --with-superuser-path was given.
 if test ${with_superuser_path+y}
 then :
   withval=$with_superuser_path;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 
 printf "%s\n" "#define SUPERUSER_PATH \"$withval\"" >>confdefs.h
 
 			superuser_path=$withval
 		fi
 
 
 fi
 
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we need to convert IPv4 in IPv6-mapped addresses" >&5
 printf %s "checking if we need to convert IPv4 in IPv6-mapped addresses... " >&6; }
 IPV4_IN6_HACK_MSG="no"
 
 # Check whether --with-4in6 was given.
 if test ${with_4in6+y}
 then :
   withval=$with_4in6;
 		if test "x$withval" != "xno" ; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
 printf "%s\n" "#define IPV4_IN_IPV6 1" >>confdefs.h
 
 			IPV4_IN6_HACK_MSG="yes"
 		else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		fi
 
 else $as_nop
 
 		if test "x$inet6_default_4in6" = "xyes"; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes (default)" >&5
 printf "%s\n" "yes (default)" >&6; }
 			printf "%s\n" "#define IPV4_IN_IPV6 1" >>confdefs.h
 
 			IPV4_IN6_HACK_MSG="yes"
 		else
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no (default)" >&5
 printf "%s\n" "no (default)" >&6; }
 		fi
 
 
 fi
 
 
 # Whether to enable BSD auth support
 BSD_AUTH_MSG=no
 
 # Check whether --with-bsd-auth was given.
 if test ${with_bsd_auth+y}
 then :
   withval=$with_bsd_auth;
 		if test "x$withval" != "xno" ; then
 
 printf "%s\n" "#define BSD_AUTH 1" >>confdefs.h
 
 			BSD_AUTH_MSG=yes
 		fi
 
 
 fi
 
 
 # Where to place sshd.pid
 piddir=/var/run
 # make sure the directory exists
 if test ! -d $piddir ; then
 	piddir=`eval echo ${sysconfdir}`
 	case $piddir in
 		NONE/*) piddir=`echo $piddir | sed "s~NONE~$ac_default_prefix~"` ;;
 	esac
 fi
 
 
 # Check whether --with-pid-dir was given.
 if test ${with_pid_dir+y}
 then :
   withval=$with_pid_dir;
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			piddir=$withval
 			if test ! -d $piddir ; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ** no $piddir directory on this system **" >&5
 printf "%s\n" "$as_me: WARNING: ** no $piddir directory on this system **" >&2;}
 			fi
 		fi
 
 
 fi
 
 
 
 printf "%s\n" "#define _PATH_SSH_PIDDIR \"$piddir\"" >>confdefs.h
 
 
 
+
+# Check whether --enable-fd-passing was given.
+if test ${enable_fd_passing+y}
+then :
+  enableval=$enable_fd_passing;
+		if test "x$enableval" = "xno" ; then
+			printf "%s\n" "#define DISABLE_FD_PASSING 1" >>confdefs.h
+
+		fi
+
+
+fi
+
+
 # Check whether --enable-lastlog was given.
 if test ${enable_lastlog+y}
 then :
   enableval=$enable_lastlog;
 		if test "x$enableval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_LASTLOG 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-utmp was given.
 if test ${enable_utmp+y}
 then :
   enableval=$enable_utmp;
 		if test "x$enableval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-utmpx was given.
 if test ${enable_utmpx+y}
 then :
   enableval=$enable_utmpx;
 		if test "x$enableval" = "xno" ; then
 
 printf "%s\n" "#define DISABLE_UTMPX 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-wtmp was given.
 if test ${enable_wtmp+y}
 then :
   enableval=$enable_wtmp;
 		if test "x$enableval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_WTMP 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-wtmpx was given.
 if test ${enable_wtmpx+y}
 then :
   enableval=$enable_wtmpx;
 		if test "x$enableval" = "xno" ; then
 
 printf "%s\n" "#define DISABLE_WTMPX 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-libutil was given.
 if test ${enable_libutil+y}
 then :
   enableval=$enable_libutil;
 		if test "x$enableval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_LOGIN 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-pututline was given.
 if test ${enable_pututline+y}
 then :
   enableval=$enable_pututline;
 		if test "x$enableval" = "xno" ; then
 
 printf "%s\n" "#define DISABLE_PUTUTLINE 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 # Check whether --enable-pututxline was given.
 if test ${enable_pututxline+y}
 then :
   enableval=$enable_pututxline;
 		if test "x$enableval" = "xno" ; then
 
 printf "%s\n" "#define DISABLE_PUTUTXLINE 1" >>confdefs.h
 
 		fi
 
 
 fi
 
 
 # Check whether --with-lastlog was given.
 if test ${with_lastlog+y}
 then :
   withval=$with_lastlog;
 		if test "x$withval" = "xno" ; then
 			printf "%s\n" "#define DISABLE_LASTLOG 1" >>confdefs.h
 
 		elif test -n "$withval"  &&  test "x${withval}" != "xyes"; then
 			conf_lastlog_location=$withval
 		fi
 
 
 fi
 
 
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if your system defines LASTLOG_FILE" >&5
 printf %s "checking if your system defines LASTLOG_FILE... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_LASTLOG_H
 #  include <lastlog.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 #ifdef HAVE_LOGIN_H
 # include <login.h>
 #endif
 
 int
 main (void)
 {
  char *lastlog = LASTLOG_FILE;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if your system defines _PATH_LASTLOG" >&5
 printf %s "checking if your system defines _PATH_LASTLOG... " >&6; }
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_LASTLOG_H
 #  include <lastlog.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 
 int
 main (void)
 {
  char *lastlog = _PATH_LASTLOG;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
 
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			system_lastlog_path=no
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 if test -z "$conf_lastlog_location"; then
 	if test x"$system_lastlog_path" = x"no" ; then
 		for f in /var/log/lastlog /usr/adm/lastlog /var/adm/lastlog /etc/security/lastlog ; do
 				if (test -d "$f" || test -f "$f") ; then
 					conf_lastlog_location=$f
 				fi
 		done
 		if test -z "$conf_lastlog_location"; then
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: ** Cannot find lastlog **" >&5
 printf "%s\n" "$as_me: WARNING: ** Cannot find lastlog **" >&2;}
 					fi
 	fi
 fi
 
 if test -n "$conf_lastlog_location"; then
 
 printf "%s\n" "#define CONF_LASTLOG_FILE \"$conf_lastlog_location\"" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if your system defines UTMP_FILE" >&5
 printf %s "checking if your system defines UTMP_FILE... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 
 int
 main (void)
 {
  char *utmp = UTMP_FILE;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	  system_utmp_path=no
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 if test -z "$conf_utmp_location"; then
 	if test x"$system_utmp_path" = x"no" ; then
 		for f in /etc/utmp /usr/adm/utmp /var/run/utmp; do
 			if test -f $f ; then
 				conf_utmp_location=$f
 			fi
 		done
 		if test -z "$conf_utmp_location"; then
 			printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 		fi
 	fi
 fi
 if test -n "$conf_utmp_location"; then
 
 printf "%s\n" "#define CONF_UTMP_FILE \"$conf_utmp_location\"" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if your system defines WTMP_FILE" >&5
 printf %s "checking if your system defines WTMP_FILE... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 
 int
 main (void)
 {
  char *wtmp = WTMP_FILE;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	  system_wtmp_path=no
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 if test -z "$conf_wtmp_location"; then
 	if test x"$system_wtmp_path" = x"no" ; then
 		for f in /usr/adm/wtmp /var/log/wtmp; do
 			if test -f $f ; then
 				conf_wtmp_location=$f
 			fi
 		done
 		if test -z "$conf_wtmp_location"; then
 			printf "%s\n" "#define DISABLE_WTMP 1" >>confdefs.h
 
 		fi
 	fi
 fi
 if test -n "$conf_wtmp_location"; then
 
 printf "%s\n" "#define CONF_WTMP_FILE \"$conf_wtmp_location\"" >>confdefs.h
 
 fi
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if your system defines WTMPX_FILE" >&5
 printf %s "checking if your system defines WTMPX_FILE... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 
 int
 main (void)
 {
  char *wtmpx = WTMPX_FILE;
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else $as_nop
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	  system_wtmpx_path=no
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 if test -z "$conf_wtmpx_location"; then
 	if test x"$system_wtmpx_path" = x"no" ; then
 		printf "%s\n" "#define DISABLE_WTMPX 1" >>confdefs.h
 
 	fi
 else
 
 printf "%s\n" "#define CONF_WTMPX_FILE \"$conf_wtmpx_location\"" >>confdefs.h
 
 fi
 
 
 if test ! -z "$blibpath" ; then
 	LDFLAGS="$LDFLAGS $blibflags$blibpath"
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Please check and edit blibpath in LDFLAGS in Makefile" >&5
 printf "%s\n" "$as_me: WARNING: Please check and edit blibpath in LDFLAGS in Makefile" >&2;}
 fi
 
 ac_fn_c_check_member "$LINENO" "struct lastlog" "ll_line" "ac_cv_member_struct_lastlog_ll_line" "
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #ifdef HAVE_UTMP_H
 #include <utmp.h>
 #endif
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_LASTLOG_H
 #include <lastlog.h>
 #endif
 
 "
 if test "x$ac_cv_member_struct_lastlog_ll_line" = xyes
 then :
 
 else $as_nop
 
     if test x$SKIP_DISABLE_LASTLOG_DEFINE != "xyes" ; then
 	printf "%s\n" "#define DISABLE_LASTLOG 1" >>confdefs.h
 
     fi
 
 fi
 
 
 ac_fn_c_check_member "$LINENO" "struct utmp" "ut_line" "ac_cv_member_struct_utmp_ut_line" "
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #ifdef HAVE_UTMP_H
 #include <utmp.h>
 #endif
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_LASTLOG_H
 #include <lastlog.h>
 #endif
 
 "
 if test "x$ac_cv_member_struct_utmp_ut_line" = xyes
 then :
 
 else $as_nop
 
 	printf "%s\n" "#define DISABLE_UTMP 1" >>confdefs.h
 
 	printf "%s\n" "#define DISABLE_WTMP 1" >>confdefs.h
 
 
 fi
 
 
 CFLAGS="$CFLAGS $werror_flags"
 
 if test "x$ac_cv_func_getaddrinfo" != "xyes" ; then
 	TEST_SSH_IPV6=no
 else
 	TEST_SSH_IPV6=yes
 fi
 ac_fn_check_decl "$LINENO" "BROKEN_GETADDRINFO" "ac_cv_have_decl_BROKEN_GETADDRINFO" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_BROKEN_GETADDRINFO" = xyes
 then :
   TEST_SSH_IPV6=no
 fi
 TEST_SSH_IPV6=$TEST_SSH_IPV6
 
 TEST_SSH_UTF8=$TEST_SSH_UTF8
 
 TEST_MALLOC_OPTIONS=$TEST_MALLOC_OPTIONS
 
 UNSUPPORTED_ALGORITHMS=$unsupported_algorithms
 
 DEPEND=$(cat $srcdir/.depend)
 
 
 # Binaries for interop tests.
 # Extract the first word of "plink", so it can be a program name with args.
 set dummy plink; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PLINK+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PLINK in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PLINK="$PLINK" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PLINK="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 PLINK=$ac_cv_path_PLINK
 if test -n "$PLINK"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PLINK" >&5
 printf "%s\n" "$PLINK" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "puttygen", so it can be a program name with args.
 set dummy puttygen; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_PUTTYGEN+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $PUTTYGEN in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PUTTYGEN="$PUTTYGEN" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_PUTTYGEN="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 PUTTYGEN=$ac_cv_path_PUTTYGEN
 if test -n "$PUTTYGEN"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PUTTYGEN" >&5
 printf "%s\n" "$PUTTYGEN" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "conch", so it can be a program name with args.
 set dummy conch; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_CONCH+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $CONCH in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_CONCH="$CONCH" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_CONCH="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 CONCH=$ac_cv_path_CONCH
 if test -n "$CONCH"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CONCH" >&5
 printf "%s\n" "$CONCH" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "dropbear", so it can be a program name with args.
 set dummy dropbear; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_DROPBEAR+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $DROPBEAR in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_DROPBEAR="$DROPBEAR" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_DROPBEAR="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 DROPBEAR=$ac_cv_path_DROPBEAR
 if test -n "$DROPBEAR"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DROPBEAR" >&5
 printf "%s\n" "$DROPBEAR" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "dbclient", so it can be a program name with args.
 set dummy dbclient; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_DBCLIENT+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $DBCLIENT in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_DBCLIENT="$DBCLIENT" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_DBCLIENT="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 DBCLIENT=$ac_cv_path_DBCLIENT
 if test -n "$DBCLIENT"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DBCLIENT" >&5
 printf "%s\n" "$DBCLIENT" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "dropbearkey", so it can be a program name with args.
 set dummy dropbearkey; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_DROPBEARKEY+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $DROPBEARKEY in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_DROPBEARKEY="$DROPBEARKEY" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_DROPBEARKEY="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 DROPBEARKEY=$ac_cv_path_DROPBEARKEY
 if test -n "$DROPBEARKEY"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DROPBEARKEY" >&5
 printf "%s\n" "$DROPBEARKEY" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 # Extract the first word of "dropbearconvert", so it can be a program name with args.
 set dummy dropbearconvert; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_path_DROPBEARCONVERT+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   case $DROPBEARCONVERT in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_DROPBEARCONVERT="$DROPBEARCONVERT" # Let the user override the test with a path.
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_path_DROPBEARCONVERT="$as_dir$ac_word$ac_exec_ext"
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
   done
 IFS=$as_save_IFS
 
   ;;
 esac
 fi
 DROPBEARCONVERT=$ac_cv_path_DROPBEARCONVERT
 if test -n "$DROPBEARCONVERT"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DROPBEARCONVERT" >&5
 printf "%s\n" "$DROPBEARCONVERT" >&6; }
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi
 
 
 
 CFLAGS="${CFLAGS} ${CFLAGS_AFTER}"
 LDFLAGS="${LDFLAGS} ${LDFLAGS_AFTER}"
 
 # Make a copy of CFLAGS/LDFLAGS without PIE options.
 LDFLAGS_NOPIE=`echo "$LDFLAGS" | sed 's/ -pie//'`
 CFLAGS_NOPIE=`echo "$CFLAGS" | sed 's/ -fPIE//'`
 
 
 
 
 ac_config_files="$ac_config_files Makefile buildpkg.sh opensshd.init openssh.xml openbsd-compat/Makefile openbsd-compat/regress/Makefile survey.sh"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
 # scripts and configure runs, see configure's option --config-cache.
 # It is not useful on other systems.  If it contains results you don't
 # want to keep, you may remove or edit it.
 #
 # config.status only pays attention to the cache file if you give it
 # the --recheck option to rerun configure.
 #
 # `ac_cv_env_foo' variables (set or unset) will be overridden when
 # loading this file, other *unset* `ac_cv_foo' will be assigned the
 # following values.
 
 _ACEOF
 
 # The following way of writing the cache mishandles newlines in values,
 # but we know of no workaround that is simple, portable, and efficient.
 # So, we kill variables containing newlines.
 # Ultrix sh set writes to stderr and can't be redirected directly,
 # and sets the high bit in the cache file unless we assign to the vars.
 (
   for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
     eval ac_val=\$$ac_var
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
       *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
 printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
       BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
       *) { eval $ac_var=; unset $ac_var;} ;;
       esac ;;
     esac
   done
 
   (set) 2>&1 |
     case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
       # `set' does not quote correctly, so add quotes: double-quote
       # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
 	"s/'/'\\\\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
       ;; #(
     *)
       # `set' quotes correctly as required by POSIX, so do not add quotes.
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
     sort
 ) |
   sed '
      /^ac_cv_env_/b end
      t clear
      :clear
      s/^\([^=]*\)=\(.*[{}].*\)$/test ${\1+y} || &/
      t end
      s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
      :end' >>confcache
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
     if test "x$cache_file" != "x/dev/null"; then
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
 printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
       if test ! -f "$cache_file" || test -h "$cache_file"; then
 	cat confcache >"$cache_file"
       else
         case $cache_file in #(
         */* | ?:*)
 	  mv -f confcache "$cache_file"$$ &&
 	  mv -f "$cache_file"$$ "$cache_file" ;; #(
         *)
 	  mv -f confcache "$cache_file" ;;
 	esac
       fi
     fi
   else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
 printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
   fi
 fi
 rm -f confcache
 
 test "x$prefix" = xNONE && prefix=$ac_default_prefix
 # Let make expand exec_prefix.
 test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
 
 DEFS=-DHAVE_CONFIG_H
 
 ac_libobjs=
 ac_ltlibobjs=
 U=
 for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
   # 1. Remove the extension, and $U if already installed.
   ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
   ac_i=`printf "%s\n" "$ac_i" | sed "$ac_script"`
   # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
   #    will be set to the directory where LIBOBJS objects are built.
   as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
   as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
 done
 LIBOBJS=$ac_libobjs
 
 LTLIBOBJS=$ac_ltlibobjs
 
 
 
 
 : "${CONFIG_STATUS=./config.status}"
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
 printf "%s\n" "$as_me: creating $CONFIG_STATUS" >&6;}
 as_write_fail=0
 cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
 #! $SHELL
 # Generated by $as_me.
 # Run this file to recreate the current configuration.
 # Compiler output produced by configure, useful for debugging
 # configure, is in config.log if it exists.
 
 debug=false
 ac_cs_recheck=false
 ac_cs_silent=false
 
 SHELL=\${CONFIG_SHELL-$SHELL}
 export SHELL
 _ASEOF
 cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
 ## -------------------- ##
 ## M4sh Initialization. ##
 ## -------------------- ##
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
 as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else $as_nop
   case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
 esac
 fi
 
 
 
 # Reset variables that may have inherited troublesome values from
 # the environment.
 
 # IFS needs to be set, to space, tab, and newline, in precisely that order.
 # (If _AS_PATH_WALK were called with IFS unset, it would have the
 # side effect of setting IFS to empty, thus disabling word splitting.)
 # Quoting is to prevent editors from complaining about space-tab.
 as_nl='
 '
 export as_nl
 IFS=" ""	$as_nl"
 
 PS1='$ '
 PS2='> '
 PS4='+ '
 
 # Ensure predictable behavior from utilities with locale-dependent output.
 LC_ALL=C
 export LC_ALL
 LANGUAGE=C
 export LANGUAGE
 
 # We cannot yet rely on "unset" to work, but we need these variables
 # to be unset--not just set to an empty or harmless value--now, to
 # avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
 # also avoids known problems related to "unset" and subshell syntax
 # in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
 for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
 do eval test \${$as_var+y} \
   && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
 done
 
 # Ensure that fds 0, 1, and 2 are open.
 if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
 if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
 if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
 
 # The user is always right.
 if ${PATH_SEPARATOR+false} :; then
   PATH_SEPARATOR=:
   (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
     (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
       PATH_SEPARATOR=';'
   }
 fi
 
 
 # Find who we are.  Look in the path if we contain no directory separator.
 as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   case $as_dir in #(((
     '') as_dir=./ ;;
     */) ;;
     *) as_dir=$as_dir/ ;;
   esac
     test -r "$as_dir$0" && as_myself=$as_dir$0 && break
   done
 IFS=$as_save_IFS
 
      ;;
 esac
 # We did not find ourselves, most probably we were run as `sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
   printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
 
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
 # Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
 # provided, also output the error to LOG_FD, referencing LINENO. Then exit the
 # script with STATUS, using 1 if that was 0.
 as_fn_error ()
 {
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
     printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
   printf "%s\n" "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
 
 
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
 as_fn_set_status ()
 {
   return $1
 } # as_fn_set_status
 
 # as_fn_exit STATUS
 # -----------------
 # Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
 as_fn_exit ()
 {
   set +e
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
 
 # as_fn_unset VAR
 # ---------------
 # Portably unset VAR.
 as_fn_unset ()
 {
   { eval $1=; unset $1;}
 }
 as_unset=as_fn_unset
 
 # as_fn_append VAR VALUE
 # ----------------------
 # Append the text in VALUE to the end of the definition contained in VAR. Take
 # advantage of any shell optimizations that allow amortized linear growth over
 # repeated appends, instead of the typical quadratic growth present in naive
 # implementations.
 if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
 then :
   eval 'as_fn_append ()
   {
     eval $1+=\$2
   }'
 else $as_nop
   as_fn_append ()
   {
     eval $1=\$$1\$2
   }
 fi # as_fn_append
 
 # as_fn_arith ARG...
 # ------------------
 # Perform arithmetic evaluation on the ARGs, and store the result in the
 # global $as_val. Take advantage of shells that can avoid forks. The arguments
 # must be portable across $(()) and expr.
 if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
 then :
   eval 'as_fn_arith ()
   {
     as_val=$(( $* ))
   }'
 else $as_nop
   as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
   }
 fi # as_fn_arith
 
 
 if expr a : '\(a\)' >/dev/null 2>&1 &&
    test "X`expr 00001 : '.*\(...\)'`" = X001; then
   as_expr=expr
 else
   as_expr=false
 fi
 
 if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
   as_basename=basename
 else
   as_basename=false
 fi
 
 if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
   as_dirname=dirname
 else
   as_dirname=false
 fi
 
 as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\/\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\/\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
 
 # Avoid depending upon Character Ranges.
 as_cr_letters='abcdefghijklmnopqrstuvwxyz'
 as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
 as_cr_Letters=$as_cr_letters$as_cr_LETTERS
 as_cr_digits='0123456789'
 as_cr_alnum=$as_cr_Letters$as_cr_digits
 
 
 # Determine whether it's possible to make 'echo' print without a newline.
 # These variables are no longer used directly by Autoconf, but are AC_SUBSTed
 # for compatibility with existing Makefiles.
 ECHO_C= ECHO_N= ECHO_T=
 case `echo -n x` in #(((((
 -n*)
   case `echo 'xy\c'` in
   *c*) ECHO_T='	';;	# ECHO_T is single tab character.
   xy)  ECHO_C='\c';;
   *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
        ECHO_T='	';;
   esac;;
 *)
   ECHO_N='-n';;
 esac
 
 # For backward compatibility with old third-party macros, we provide
 # the shell variables $as_echo and $as_echo_n.  New code should use
 # AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
 as_echo='printf %s\n'
 as_echo_n='printf %s'
 
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
 else
   rm -f conf$$.dir
   mkdir conf$$.dir 2>/dev/null
 fi
 if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
     # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
     # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
     # In both cases, we have to default to `cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
     as_ln_s=ln
   else
     as_ln_s='cp -pR'
   fi
 else
   as_ln_s='cp -pR'
 fi
 rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
 rmdir conf$$.dir 2>/dev/null
 
 
 # as_fn_mkdir_p
 # -------------
 # Create "$as_dir" as a directory, including parents if necessary.
 as_fn_mkdir_p ()
 {
 
   case $as_dir in #(
   -*) as_dir=./$as_dir;;
   esac
   test -d "$as_dir" || eval $as_mkdir_p || {
     as_dirs=
     while :; do
       case $as_dir in #(
       *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
       as_dir=`$as_dirname -- "$as_dir" ||
 $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)[^/].*/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
       test -d "$as_dir" && break
     done
     test -z "$as_dirs" || eval "mkdir $as_dirs"
   } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
 
 
 } # as_fn_mkdir_p
 if mkdir -p . 2>/dev/null; then
   as_mkdir_p='mkdir -p "$as_dir"'
 else
   test -d ./-p && rmdir ./-p
   as_mkdir_p=false
 fi
 
 
 # as_fn_executable_p FILE
 # -----------------------
 # Test if FILE is an executable regular file.
 as_fn_executable_p ()
 {
   test -f "$1" && test -x "$1"
 } # as_fn_executable_p
 as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
 as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
 
 # Sed expression to map a string onto a valid variable name.
 as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 exec 6>&1
 ## ----------------------------------- ##
 ## Main body of $CONFIG_STATUS script. ##
 ## ----------------------------------- ##
 _ASEOF
 test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # Save the log message, to keep $0 and so on meaningful, and to
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
 This file was extended by OpenSSH $as_me Portable, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
   CONFIG_LINKS    = $CONFIG_LINKS
   CONFIG_COMMANDS = $CONFIG_COMMANDS
   $ $0 $@
 
 on `(hostname || uname -n) 2>/dev/null | sed 1q`
 "
 
 _ACEOF
 
 case $ac_config_files in *"
 "*) set x $ac_config_files; shift; ac_config_files=$*;;
 esac
 
 case $ac_config_headers in *"
 "*) set x $ac_config_headers; shift; ac_config_headers=$*;;
 esac
 
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
 config_files="$ac_config_files"
 config_headers="$ac_config_headers"
 
 _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
 \`$as_me' instantiates files and other configuration actions
 from templates according to the current configuration.  Unless the files
 and actions are specified as TAGs, all are instantiated by default.
 
 Usage: $0 [OPTION]... [TAG]...
 
   -h, --help       print this help, then exit
   -V, --version    print version number and configuration settings, then exit
       --config     print configuration, then exit
   -q, --quiet, --silent
                    do not print progress messages
   -d, --debug      don't remove temporary files
       --recheck    update $as_me by reconfiguring in the same conditions
       --file=FILE[:TEMPLATE]
                    instantiate the configuration file FILE
       --header=FILE[:TEMPLATE]
                    instantiate the configuration header FILE
 
 Configuration files:
 $config_files
 
 Configuration headers:
 $config_headers
 
 Report bugs to <openssh-unix-dev@mindrot.org>."
 
 _ACEOF
 ac_cs_config=`printf "%s\n" "$ac_configure_args" | sed "$ac_safe_unquote"`
 ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
 OpenSSH config.status Portable
 configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 
 Copyright (C) 2021 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
 ac_pwd='$ac_pwd'
 srcdir='$srcdir'
 INSTALL='$INSTALL'
 MKDIR_P='$MKDIR_P'
 AWK='$AWK'
 test -n "\$AWK" || AWK=awk
 _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # The default lists apply if the user does not specify any file.
 ac_need_defaults=:
 while test $# != 0
 do
   case $1 in
   --*=?*)
     ac_option=`expr "X$1" : 'X\([^=]*\)='`
     ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
     ac_shift=:
     ;;
   --*=)
     ac_option=`expr "X$1" : 'X\([^=]*\)='`
     ac_optarg=
     ac_shift=:
     ;;
   *)
     ac_option=$1
     ac_optarg=$2
     ac_shift=shift
     ;;
   esac
 
   case $ac_option in
   # Handling of the options.
   -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
     ac_cs_recheck=: ;;
   --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
     printf "%s\n" "$ac_cs_version"; exit ;;
   --config | --confi | --conf | --con | --co | --c )
     printf "%s\n" "$ac_cs_config"; exit ;;
   --debug | --debu | --deb | --de | --d | -d )
     debug=: ;;
   --file | --fil | --fi | --f )
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     '') as_fn_error $? "missing file argument" ;;
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
     ac_need_defaults=false;;
   --header | --heade | --head | --hea )
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     as_fn_append CONFIG_HEADERS " '$ac_optarg'"
     ac_need_defaults=false;;
   --he | --h)
     # Conflict between --help and --header
     as_fn_error $? "ambiguous option: \`$1'
 Try \`$0 --help' for more information.";;
   --help | --hel | -h )
     printf "%s\n" "$ac_cs_usage"; exit ;;
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
   | -silent | --silent | --silen | --sile | --sil | --si | --s)
     ac_cs_silent=: ;;
 
   # This is an error.
   -*) as_fn_error $? "unrecognized option: \`$1'
 Try \`$0 --help' for more information." ;;
 
   *) as_fn_append ac_config_targets " $1"
      ac_need_defaults=false ;;
 
   esac
   shift
 done
 
 ac_configure_extra_args=
 
 if $ac_cs_silent; then
   exec 6>/dev/null
   ac_configure_extra_args="$ac_configure_extra_args --silent"
 fi
 
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 if \$ac_cs_recheck; then
   set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
   shift
   \printf "%s\n" "running CONFIG_SHELL=$SHELL \$*" >&6
   CONFIG_SHELL='$SHELL'
   export CONFIG_SHELL
   exec "\$@"
 fi
 
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 exec 5>>config.log
 {
   echo
   sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
 ## Running $as_me. ##
 _ASBOX
   printf "%s\n" "$ac_log"
 } >&5
 
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 
 # Handling of arguments.
 for ac_config_target in $ac_config_targets
 do
   case $ac_config_target in
     "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "buildpkg.sh") CONFIG_FILES="$CONFIG_FILES buildpkg.sh" ;;
     "opensshd.init") CONFIG_FILES="$CONFIG_FILES opensshd.init" ;;
     "openssh.xml") CONFIG_FILES="$CONFIG_FILES openssh.xml" ;;
     "openbsd-compat/Makefile") CONFIG_FILES="$CONFIG_FILES openbsd-compat/Makefile" ;;
     "openbsd-compat/regress/Makefile") CONFIG_FILES="$CONFIG_FILES openbsd-compat/regress/Makefile" ;;
     "survey.sh") CONFIG_FILES="$CONFIG_FILES survey.sh" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac
 done
 
 
 # If the user did not use the arguments to specify the items to instantiate,
 # then the envvar interface is used.  Set only those that are not.
 # We use the long form for the default assignment because of an extremely
 # bizarre bug on SunOS 4.1.3.
 if $ac_need_defaults; then
   test ${CONFIG_FILES+y} || CONFIG_FILES=$config_files
   test ${CONFIG_HEADERS+y} || CONFIG_HEADERS=$config_headers
 fi
 
 # Have a temporary directory for convenience.  Make it in the build tree
 # simply because there is no reason against having it here, and in addition,
 # creating and moving files from /tmp can sometimes cause problems.
 # Hook for its removal unless debugging.
 # Note that there is a small window in which the directory will not be cleaned:
 # after its creation but before its name has been assigned to `$tmp'.
 $debug ||
 {
   tmp= ac_tmp=
   trap 'exit_status=$?
   : "${ac_tmp:=$tmp}"
   { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
 ' 0
   trap 'as_fn_exit 1' 1 2 13 15
 }
 # Create a (secure) tmp directory for tmp files.
 
 {
   tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
   test -d "$tmp"
 }  ||
 {
   tmp=./conf$$-$RANDOM
   (umask 077 && mkdir "$tmp")
 } || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
 ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
 # This happens for instance with `./config.status config.h'.
 if test -n "$CONFIG_FILES"; then
 
 
 ac_cr=`echo X | tr X '\015'`
 # On cygwin, bash can eat \r inside `` if the user requested igncr.
 # But we know of no other shell where ac_cr would be empty at this
 # point, so we can use a bashism as a fallback.
 if test "x$ac_cr" = x; then
   eval ac_cr=\$\'\\r\'
 fi
 ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
 if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
   ac_cs_awk_cr='\\r'
 else
   ac_cs_awk_cr=$ac_cr
 fi
 
 echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
 _ACEOF
 
 
 {
   echo "cat >conf$$subs.awk <<_ACEOF" &&
   echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
   echo "_ACEOF"
 } >conf$$subs.sh ||
   as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
 ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   . ./conf$$subs.sh ||
     as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
 
   ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
   if test $ac_delim_n = $ac_delim_num; then
     break
   elif $ac_last_try; then
     as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
   else
     ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
   fi
 done
 rm -f conf$$subs.sh
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
 _ACEOF
 sed -n '
 h
 s/^/S["/; s/!.*/"]=/
 p
 g
 s/^[^!]*!//
 :repl
 t repl
 s/'"$ac_delim"'$//
 t delim
 :nl
 h
 s/\(.\{148\}\)..*/\1/
 t more1
 s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
 p
 n
 b repl
 :more1
 s/["\\]/\\&/g; s/^/"/; s/$/"\\/
 p
 g
 s/.\{148\}//
 t nl
 :delim
 h
 s/\(.\{148\}\)..*/\1/
 t more2
 s/["\\]/\\&/g; s/^/"/; s/$/"/
 p
 b
 :more2
 s/["\\]/\\&/g; s/^/"/; s/$/"\\/
 p
 g
 s/.\{148\}//
 t delim
 ' <conf$$subs.awk | sed '
 /^[^""]/{
   N
   s/\n//
 }
 ' >>$CONFIG_STATUS || ac_write_fail=1
 rm -f conf$$subs.awk
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACAWK
 cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
   for (key in S) S_is_set[key] = 1
   FS = ""
 
 }
 {
   line = $ 0
   nfields = split(line, field, "@")
   substed = 0
   len = length(field[1])
   for (i = 2; i < nfields; i++) {
     key = field[i]
     keylen = length(key)
     if (S_is_set[key]) {
       value = S[key]
       line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
       len += length(value) + length(field[++i])
       substed = 1
     } else
       len += 1 + keylen
   }
 
   print line
 }
 
 _ACAWK
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
   sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
 else
   cat
 fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
   || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
 _ACEOF
 
 # VPATH may cause trouble with some makes, so we remove sole $(srcdir),
 # ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
 # trailing colons and then remove the whole line if VPATH becomes empty
 # (actually we leave an empty line to preserve line numbers).
 if test "x$srcdir" = x.; then
   ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
 h
 s///
 s/^/:/
 s/[	 ]*$/:/
 s/:\$(srcdir):/:/g
 s/:\${srcdir}:/:/g
 s/:@srcdir@:/:/g
 s/^:*//
 s/:*$//
 x
 s/\(=[	 ]*\).*/\1/
 G
 s/\n//
 s/^[^=]*=[	 ]*$//
 }'
 fi
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 fi # test -n "$CONFIG_FILES"
 
 # Set up the scripts for CONFIG_HEADERS section.
 # No need to generate them if there are no CONFIG_HEADERS.
 # This happens for instance with `./config.status Makefile'.
 if test -n "$CONFIG_HEADERS"; then
 cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
 BEGIN {
 _ACEOF
 
 # Transform confdefs.h into an awk script `defines.awk', embedded as
 # here-document in config.status, that substitutes the proper values into
 # config.h.in to produce config.h.
 
 # Create a delimiter string that does not exist in confdefs.h, to ease
 # handling of long lines.
 ac_delim='%!_!# '
 for ac_last_try in false false :; do
   ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
   if test -z "$ac_tt"; then
     break
   elif $ac_last_try; then
     as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
   else
     ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
   fi
 done
 
 # For the awk script, D is an array of macro values keyed by name,
 # likewise P contains macro parameters if any.  Preserve backslash
 # newline sequences.
 
 ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
 sed -n '
 s/.\{148\}/&'"$ac_delim"'/g
 t rset
 :rset
 s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
 t def
 d
 :def
 s/\\$//
 t bsnl
 s/["\\]/\\&/g
 s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
 D["\1"]=" \3"/p
 s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
 d
 :bsnl
 s/["\\]/\\&/g
 s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
 D["\1"]=" \3\\\\\\n"\\/p
 t cont
 s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
 t cont
 d
 :cont
 n
 s/.\{148\}/&'"$ac_delim"'/g
 t clear
 :clear
 s/\\$//
 t bsnlc
 s/["\\]/\\&/g; s/^/"/; s/$/"/p
 d
 :bsnlc
 s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
 b cont
 ' <confdefs.h | sed '
 s/'"$ac_delim"'/"\\\
 "/g' >>$CONFIG_STATUS || ac_write_fail=1
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   for (key in D) D_is_set[key] = 1
   FS = ""
 }
 /^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
   line = \$ 0
   split(line, arg, " ")
   if (arg[1] == "#") {
     defundef = arg[2]
     mac1 = arg[3]
   } else {
     defundef = substr(arg[1], 2)
     mac1 = arg[2]
   }
   split(mac1, mac2, "(") #)
   macro = mac2[1]
   prefix = substr(line, 1, index(line, defundef) - 1)
   if (D_is_set[macro]) {
     # Preserve the white space surrounding the "#".
     print prefix "define", macro P[macro] D[macro]
     next
   } else {
     # Replace #undef with comments.  This is necessary, for example,
     # in the case of _POSIX_SOURCE, which is predefined and required
     # on some systems where configure will not decide to define it.
     if (defundef == "undef") {
       print "/*", prefix defundef, macro, "*/"
       next
     }
   }
 }
 { print }
 _ACAWK
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
   as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
 fi # test -n "$CONFIG_HEADERS"
 
 
 eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS    "
 shift
 for ac_tag
 do
   case $ac_tag in
   :[FHLC]) ac_mode=$ac_tag; continue;;
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
   :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
   ac_save_IFS=$IFS
   IFS=:
   set x $ac_tag
   IFS=$ac_save_IFS
   shift
   ac_file=$1
   shift
 
   case $ac_mode in
   :L) ac_source=$1;;
   :[FH])
     ac_file_inputs=
     for ac_f
     do
       case $ac_f in
       -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
 	 # because $ac_f cannot contain `:'.
 	 test -f "$ac_f" ||
 	   case $ac_f in
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
 	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
       esac
       case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
     # Let's still pretend it is `configure' which instantiates (i.e., don't
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
 	  printf "%s\n" "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
 	`' by configure.'
     if test x"$ac_file" != x-; then
       configure_input="$ac_file.  $configure_input"
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
 printf "%s\n" "$as_me: creating $ac_file" >&6;}
     fi
     # Neutralize special characters interpreted by sed in replacement strings.
     case $configure_input in #(
     *\&* | *\|* | *\\* )
        ac_sed_conf_input=`printf "%s\n" "$configure_input" |
        sed 's/[\\\\&|]/\\\\&/g'`;; #(
     *) ac_sed_conf_input=$configure_input;;
     esac
 
     case $ac_tag in
     *:-:* | *:-) cat >"$ac_tmp/stdin" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
     esac
     ;;
   esac
 
   ac_dir=`$as_dirname -- "$ac_file" ||
 $as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$ac_file" : 'X\(//\)[^/]' \| \
 	 X"$ac_file" : 'X\(//\)$' \| \
 	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
 printf "%s\n" X"$ac_file" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)[^/].*/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\/\)$/{
 	    s//\1/
 	    q
 	  }
 	  /^X\(\/\).*/{
 	    s//\1/
 	    q
 	  }
 	  s/.*/./; q'`
   as_dir="$ac_dir"; as_fn_mkdir_p
   ac_builddir=.
 
 case "$ac_dir" in
 .) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
 *)
   ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
   ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
   esac ;;
 esac
 ac_abs_top_builddir=$ac_pwd
 ac_abs_builddir=$ac_pwd$ac_dir_suffix
 # for backward compatibility:
 ac_top_builddir=$ac_top_build_prefix
 
 case $srcdir in
   .)  # We are building in place.
     ac_srcdir=.
     ac_top_srcdir=$ac_top_builddir_sub
     ac_abs_top_srcdir=$ac_pwd ;;
   [\\/]* | ?:[\\/]* )  # Absolute name.
     ac_srcdir=$srcdir$ac_dir_suffix;
     ac_top_srcdir=$srcdir
     ac_abs_top_srcdir=$srcdir ;;
   *) # Relative name.
     ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
     ac_top_srcdir=$ac_top_build_prefix$srcdir
     ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
 esac
 ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
 
 
   case $ac_mode in
   :F)
   #
   # CONFIG_FILE
   #
 
   case $INSTALL in
   [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
   *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
   esac
   ac_MKDIR_P=$MKDIR_P
   case $MKDIR_P in
   [\\/$]* | ?:[\\/]* ) ;;
   */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
   esac
 _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # If the template does not know about datarootdir, expand it.
 # FIXME: This hack should be removed a few years after 2.60.
 ac_datarootdir_hack=; ac_datarootdir_seen=
 ac_sed_dataroot='
 /datarootdir/ {
   p
   q
 }
 /@datadir@/p
 /@docdir@/p
 /@infodir@/p
 /@localedir@/p
 /@mandir@/p'
 case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
 *datarootdir*) ac_datarootdir_seen=yes;;
 *@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
 printf "%s\n" "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   ac_datarootdir_hack='
   s&@datadir@&$datadir&g
   s&@docdir@&$docdir&g
   s&@infodir@&$infodir&g
   s&@localedir@&$localedir&g
   s&@mandir@&$mandir&g
   s&\\\${datarootdir}&$datarootdir&g' ;;
 esac
 _ACEOF
 
 # Neutralize VPATH when `$srcdir' = `.'.
 # Shell code in configure.ac might set extrasub.
 # FIXME: do we really want to maintain this feature?
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_sed_extra="$ac_vpsub
 $extrasub
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 :t
 /@[a-zA-Z_][a-zA-Z_0-9]*@/!b
 s|@configure_input@|$ac_sed_conf_input|;t t
 s&@top_builddir@&$ac_top_builddir_sub&;t t
 s&@top_build_prefix@&$ac_top_build_prefix&;t t
 s&@srcdir@&$ac_srcdir&;t t
 s&@abs_srcdir@&$ac_abs_srcdir&;t t
 s&@top_srcdir@&$ac_top_srcdir&;t t
 s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
 s&@builddir@&$ac_builddir&;t t
 s&@abs_builddir@&$ac_abs_builddir&;t t
 s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 s&@MKDIR_P@&$ac_MKDIR_P&;t t
 $ac_datarootdir_hack
 "
 eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
   >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
 printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"
   case $ac_file in
   -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
   *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
   esac \
   || as_fn_error $? "could not create $ac_file" "$LINENO" 5
  ;;
   :H)
   #
   # CONFIG_HEADER
   #
   if test x"$ac_file" != x-; then
     {
       printf "%s\n" "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
     } >"$ac_tmp/config.h" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5
     if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
 printf "%s\n" "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
       mv "$ac_tmp/config.h" "$ac_file" \
 	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
     printf "%s\n" "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
       || as_fn_error $? "could not create -" "$LINENO" 5
   fi
  ;;
 
 
   esac
 
 done # for ac_tag
 
 
 as_fn_exit 0
 _ACEOF
 ac_clean_files=$ac_clean_files_save
 
 test $ac_write_fail = 0 ||
   as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
 
 
 # configure is writing to config.log, and then calls config.status.
 # config.status does its own redirection, appending to config.log.
 # Unfortunately, on DOS this fails, as config.log is still kept open
 # by configure, so config.status won't be able to write to it; its
 # output is simply discarded.  So we exec the FD to /dev/null,
 # effectively closing config.log, so it can be properly (re)opened and
 # appended to by config.status.  When coming back to configure, we
 # need to make the FD available again.
 if test "$no_create" != yes; then
   ac_cs_success=:
   ac_config_status_args=
   test "$silent" = yes &&
     ac_config_status_args="$ac_config_status_args --quiet"
   exec 5>/dev/null
   $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
   exec 5>>config.log
   # Use ||, not &&, to avoid exiting from the if with $? = 1, which
   # would make configure fail if this is the last instruction.
   $ac_cs_success || as_fn_exit 1
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
 printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
 
 # Print summary of options
 
 # Someone please show me a better way :)
 A=`eval echo ${prefix}` ; A=`eval echo ${A}`
 B=`eval echo ${bindir}` ; B=`eval echo ${B}`
 C=`eval echo ${sbindir}` ; C=`eval echo ${C}`
 D=`eval echo ${sysconfdir}` ; D=`eval echo ${D}`
 E=`eval echo ${libexecdir}/ssh-askpass` ; E=`eval echo ${E}`
 F=`eval echo ${mandir}/${mansubdir}X` ; F=`eval echo ${F}`
 G=`eval echo ${piddir}` ; G=`eval echo ${G}`
 H=`eval echo ${PRIVSEP_PATH}` ; H=`eval echo ${H}`
 I=`eval echo ${user_path}` ; I=`eval echo ${I}`
 J=`eval echo ${superuser_path}` ; J=`eval echo ${J}`
 
 echo ""
 echo "OpenSSH has been configured with the following options:"
 echo "                     User binaries: $B"
 echo "                   System binaries: $C"
 echo "               Configuration files: $D"
 echo "                   Askpass program: $E"
 echo "                      Manual pages: $F"
 echo "                          PID file: $G"
 echo "  Privilege separation chroot path: $H"
 if test "x$external_path_file" = "x/etc/login.conf" ; then
 echo "   At runtime, sshd will use the path defined in $external_path_file"
 echo "   Make sure the path to scp is present, otherwise scp will not work"
 else
 echo "            sshd default user PATH: $I"
 	if test ! -z "$external_path_file"; then
 echo "   (If PATH is set in $external_path_file it will be used instead. If"
 echo "   used, ensure the path to scp is present, otherwise scp will not work.)"
 	fi
 fi
 if test ! -z "$superuser_path" ; then
 echo "          sshd superuser user PATH: $J"
 fi
 echo "                    Manpage format: $MANTYPE"
 echo "                       PAM support: $PAM_MSG"
 echo "                   OSF SIA support: $SIA_MSG"
 echo "                 KerberosV support: $KRB5_MSG"
 echo "                   SELinux support: $SELINUX_MSG"
 echo "                   libedit support: $LIBEDIT_MSG"
 echo "                   libldns support: $LDNS_MSG"
 echo "  Solaris process contract support: $SPC_MSG"
 echo "           Solaris project support: $SP_MSG"
 echo "         Solaris privilege support: $SPP_MSG"
 echo "       IP address in \$DISPLAY hack: $DISPLAY_HACK_MSG"
 echo "           Translate v4 in v6 hack: $IPV4_IN6_HACK_MSG"
 echo "                  BSD Auth support: $BSD_AUTH_MSG"
 echo "              Random number source: $RAND_MSG"
 echo "             Privsep sandbox style: $SANDBOX_STYLE"
 echo "                   PKCS#11 support: $enable_pkcs11"
 echo "                  U2F/FIDO support: $enable_sk"
 
 echo ""
 
 echo "              Host: ${host}"
 echo "          Compiler: ${CC}"
 echo "    Compiler flags: ${CFLAGS}"
 echo "Preprocessor flags: ${CPPFLAGS}"
 echo "      Linker flags: ${LDFLAGS}"
 echo "         Libraries: ${LIBS}"
 if test ! -z "${CHANNELLIBS}"; then
 echo "     +for channels: ${CHANNELLIBS}"
 fi
 if test ! -z "${LIBFIDO2}"; then
 echo "        +for FIDO2: ${LIBFIDO2}"
 fi
 if test ! -z "${SSHDLIBS}"; then
 echo "         +for sshd: ${SSHDLIBS}"
 fi
 
 echo ""
 
 if test "x$MAKE_PACKAGE_SUPPORTED" = "xyes" ; then
 	echo "SVR4 style packages are supported with \"make package\""
 	echo ""
 fi
 
 if test "x$PAM_MSG" = "xyes" ; then
 	echo "PAM is enabled. You may need to install a PAM control file "
 	echo "for sshd, otherwise password authentication may fail. "
 	echo "Example PAM control files can be found in the contrib/ "
 	echo "subdirectory"
 	echo ""
 fi
 
 if test ! -z "$NO_PEERCHECK" ; then
 	echo "WARNING: the operating system that you are using does not"
 	echo "appear to support getpeereid(), getpeerucred() or the"
 	echo "SO_PEERCRED getsockopt() option. These facilities are used to"
 	echo "enforce security checks to prevent unauthorised connections to"
 	echo "ssh-agent. Their absence increases the risk that a malicious"
 	echo "user can connect to your agent."
 	echo ""
 fi
 
 if test "$AUDIT_MODULE" = "bsm" ; then
 	echo "WARNING: BSM audit support is currently considered EXPERIMENTAL."
 	echo "See the Solaris section in README.platform for details."
 fi
diff --git a/configure.ac b/configure.ac
index 379cd746b92e..82e8bb7c1410 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5707 +1,5745 @@
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
 # Permission to use, copy, modify, and distribute this software for any
 # purpose with or without fee is hereby granted, provided that the above
 # copyright notice and this permission notice appear in all copies.
 #
 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT([OpenSSH], [Portable], [openssh-unix-dev@mindrot.org])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([ssh.c])
 
 # Check for stale configure as early as possible.
 for i in $srcdir/configure.ac $srcdir/m4/*.m4; do
 	if test "$i" -nt "$srcdir/configure"; then
 		AC_MSG_ERROR([$i newer than configure, run autoreconf])
 	fi
 done
 
 AC_LANG([C])
 
 AC_CONFIG_HEADERS([config.h])
 AC_PROG_CC([cc gcc clang])
 
 # XXX relax this after reimplementing logit() etc.
 AC_MSG_CHECKING([if $CC supports C99-style variadic macros])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 int f(int a, int b, int c) { return a + b + c; }
 #define F(a, ...) f(a, __VA_ARGS__)
 ]], [[return F(1, 2, -3);]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_ERROR([*** OpenSSH requires support for C99-style variadic macros]) ]
 )
 
 AC_CANONICAL_HOST
 AC_C_BIGENDIAN
 
 # Checks for programs.
 AC_PROG_AWK
 AC_PROG_CPP
 AC_PROG_RANLIB
 AC_PROG_INSTALL
 AC_PROG_EGREP
 AC_PROG_MKDIR_P
 AC_CHECK_TOOLS([AR], [ar])
 AC_PATH_PROG([CAT], [cat])
 AC_PATH_PROG([KILL], [kill])
 AC_PATH_PROG([SED], [sed])
 AC_PATH_PROG([TEST_MINUS_S_SH], [bash])
 AC_PATH_PROG([TEST_MINUS_S_SH], [ksh])
 AC_PATH_PROG([TEST_MINUS_S_SH], [sh])
 AC_PATH_PROG([SH], [bash])
 AC_PATH_PROG([SH], [ksh])
 AC_PATH_PROG([SH], [sh])
 AC_PATH_PROG([GROFF], [groff])
 AC_PATH_PROG([NROFF], [nroff awf])
 AC_PATH_PROG([MANDOC], [mandoc])
 AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
 AC_SUBST([TEST_SHELL], [sh])
 
 dnl select manpage formatter to be used to build "cat" format pages.
 if test "x$MANDOC" != "x" ; then
 	MANFMT="$MANDOC"
 elif test "x$NROFF" != "x" ; then
 	MANFMT="$NROFF -mandoc"
 elif test "x$GROFF" != "x" ; then
 	MANFMT="$GROFF -mandoc -Tascii"
 else
 	AC_MSG_WARN([no manpage formatter found])
 	MANFMT="false"
 fi
 AC_SUBST([MANFMT])
 
 dnl for buildpkg.sh
 AC_PATH_PROG([PATH_GROUPADD_PROG], [groupadd], [groupadd],
 	[/usr/sbin${PATH_SEPARATOR}/etc])
 AC_PATH_PROG([PATH_USERADD_PROG], [useradd], [useradd],
 	[/usr/sbin${PATH_SEPARATOR}/etc])
 AC_CHECK_PROG([MAKE_PACKAGE_SUPPORTED], [pkgmk], [yes], [no])
 if test -x /sbin/sh; then
 	AC_SUBST([STARTUP_SCRIPT_SHELL], [/sbin/sh])
 else
 	AC_SUBST([STARTUP_SCRIPT_SHELL], [/bin/sh])
 fi
 
 # System features
 AC_SYS_LARGEFILE
 
 if test -z "$AR" ; then
 	AC_MSG_ERROR([*** 'ar' missing, please install or fix your \$PATH ***])
 fi
 
 AC_PATH_PROG([PATH_PASSWD_PROG], [passwd])
 if test ! -z "$PATH_PASSWD_PROG" ; then
 	AC_DEFINE_UNQUOTED([_PATH_PASSWD_PROG], ["$PATH_PASSWD_PROG"],
 		[Full path of your "passwd" program])
 fi
 
 dnl Since autoconf doesn't support it very well,  we no longer allow users to
 dnl override LD, however keeping the hook here for now in case there's a use
 dnl use case we overlooked and someone needs to re-enable it.  Unless a good
 dnl reason is found we'll be removing this in future.
 LD="$CC"
 AC_SUBST([LD])
 
 AC_C_INLINE
 
 AC_CHECK_DECL([LLONG_MAX], [have_llong_max=1], , [#include <limits.h>])
 AC_CHECK_DECL([LONG_LONG_MAX], [have_long_long_max=1], , [#include <limits.h>])
 AC_CHECK_DECL([SYSTR_POLICY_KILL], [have_systr_policy_kill=1], , [
 	#include <sys/types.h>
 	#include <sys/param.h>
 	#include <dev/systrace.h>
 ])
 AC_CHECK_DECL([RLIMIT_NPROC],
     [AC_DEFINE([HAVE_RLIMIT_NPROC], [], [sys/resource.h has RLIMIT_NPROC])], , [
 	#include <sys/types.h>
 	#include <sys/resource.h>
 ])
 AC_CHECK_DECL([PR_SET_NO_NEW_PRIVS], [have_linux_no_new_privs=1], , [
 	#include <sys/types.h>
 	#include <linux/prctl.h>
 ])
 
 openssl=yes
 openssl_bin=openssl
 AC_ARG_WITH([openssl],
 	[  --without-openssl       Disable use of OpenSSL; use only limited internal crypto **EXPERIMENTAL** ],
 	[  if test "x$withval" = "xno" ; then
 		openssl=no
 		openssl_bin=""
 	   fi
 	]
 )
 AC_MSG_CHECKING([whether OpenSSL will be used for cryptography])
 if test "x$openssl" = "xyes" ; then
 	AC_MSG_RESULT([yes])
 	AC_DEFINE_UNQUOTED([WITH_OPENSSL], [1], [use libcrypto for cryptography])
 else
 	AC_MSG_RESULT([no])
 fi
 
 use_stack_protector=1
 use_toolchain_hardening=1
+use_retpoline=1
 AC_ARG_WITH([stackprotect],
     [  --without-stackprotect  Don't use compiler's stack protection], [
     if test "x$withval" = "xno"; then
 	use_stack_protector=0
     fi ])
 AC_ARG_WITH([hardening],
     [  --without-hardening     Don't use toolchain hardening flags], [
     if test "x$withval" = "xno"; then
 	use_toolchain_hardening=0
     fi ])
+AC_ARG_WITH([retpoline],
+    [  --without-retpoline     Enable retpoline spectre mitigation], [
+    if test "x$withval" = "xno"; then
+	use_retpoline=0
+    fi ])
 
 # We use -Werror for the tests only so that we catch warnings like "this is
 # on by default" for things like -fPIE.
 AC_MSG_CHECKING([if $CC supports -Werror])
 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int main(void) { return 0; }]])],
 	[ AC_MSG_RESULT([yes])
 	  WERROR="-Werror"],
 	[ AC_MSG_RESULT([no])
 	  WERROR="" ]
 )
 CFLAGS="$saved_CFLAGS"
 
 if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
 	AC_MSG_CHECKING([gcc version])
 	GCC_VER=`$CC -v 2>&1 | $AWK '/gcc version /{print $3}'`
 	case "$GCC_VER" in
 		1.*) no_attrib_nonnull=1 ;;
 		2.8* | 2.9*)
 		     no_attrib_nonnull=1
 		     ;;
 		2.*) no_attrib_nonnull=1 ;;
 		*) ;;
 	esac
 	AC_MSG_RESULT([$GCC_VER])
 
 	AC_MSG_CHECKING([clang version])
 	ver="`$CC -v 2>&1`"
 	if echo "$ver" | grep "Apple" >/dev/null; then
 		CLANG_VER=apple-`echo "$ver" | grep 'clang version' | \
 		    $SED 's/.*clang version //g' | $AWK '{print $1}'`
 	else
 		CLANG_VER=`echo "$ver" | grep 'clang version' | \
 		    $SED 's/.*clang version //g' | $AWK '{print $1}'`
 	fi
 	AC_MSG_RESULT([$CLANG_VER])
 
 	OSSH_CHECK_CFLAG_COMPILE([-pipe])
 	OSSH_CHECK_CFLAG_COMPILE([-Wunknown-warning-option])
 	OSSH_CHECK_CFLAG_COMPILE([-Wno-error=format-truncation])
 	OSSH_CHECK_CFLAG_COMPILE([-Qunused-arguments])
 	OSSH_CHECK_CFLAG_COMPILE([-Wall])
 	OSSH_CHECK_CFLAG_COMPILE([-Wextra])
 	OSSH_CHECK_CFLAG_COMPILE([-Wpointer-arith])
 	OSSH_CHECK_CFLAG_COMPILE([-Wuninitialized])
 	OSSH_CHECK_CFLAG_COMPILE([-Wsign-compare])
 	OSSH_CHECK_CFLAG_COMPILE([-Wformat-security])
 	OSSH_CHECK_CFLAG_COMPILE([-Wsizeof-pointer-memaccess])
 	OSSH_CHECK_CFLAG_COMPILE([-Wpointer-sign], [-Wno-pointer-sign])
 	OSSH_CHECK_CFLAG_COMPILE([-Wunused-parameter], [-Wno-unused-parameter])
 	OSSH_CHECK_CFLAG_COMPILE([-Wunused-result], [-Wno-unused-result])
 	OSSH_CHECK_CFLAG_COMPILE([-Wimplicit-fallthrough])
 	OSSH_CHECK_CFLAG_COMPILE([-Wmisleading-indentation])
 	OSSH_CHECK_CFLAG_COMPILE([-Wbitwise-instead-of-logical])
 	OSSH_CHECK_CFLAG_COMPILE([-fno-strict-aliasing])
     if test "x$use_toolchain_hardening" = "x1"; then
-	OSSH_CHECK_CFLAG_COMPILE([-mretpoline]) # clang
-	OSSH_CHECK_LDFLAG_LINK([-Wl,-z,retpolineplt])
 	OSSH_CHECK_CFLAG_COMPILE([-D_FORTIFY_SOURCE=2])
 	OSSH_CHECK_LDFLAG_LINK([-Wl,-z,relro])
 	OSSH_CHECK_LDFLAG_LINK([-Wl,-z,now])
 	OSSH_CHECK_LDFLAG_LINK([-Wl,-z,noexecstack])
 	# NB. -ftrapv expects certain support functions to be present in
 	# the compiler library (libgcc or similar) to detect integer operations
 	# that can overflow. We must check that the result of enabling it
 	# actually links. The test program compiled/linked includes a number
 	# of integer operations that should exercise this.
 	OSSH_CHECK_CFLAG_LINK([-ftrapv])
 	# clang 15 seems to have a bug in -fzero-call-used-regs=all.  See
 	# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
 	# https://github.com/llvm/llvm-project/issues/59242
 	# clang 17 has a different bug that causes an ICE when using this
 	# flag at all (https://bugzilla.mindrot.org/show_bug.cgi?id=3629)
 	case "$CLANG_VER" in
 	apple-15*) OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
 	17*)	;;
 	*)	OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
 	esac
 	OSSH_CHECK_CFLAG_COMPILE([-ftrivial-auto-var-init=zero])
     fi
+    if test "x$use_retpoline" = "x1"; then
+	OSSH_CHECK_CFLAG_COMPILE([-mretpoline]) # clang
+	OSSH_CHECK_LDFLAG_LINK([-Wl,-z,retpolineplt])
+    fi
 
 	AC_MSG_CHECKING([if $CC accepts -fno-builtin-memset])
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fno-builtin-memset"
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <string.h> ]],
 			[[ char b[10]; memset(b, 0, sizeof(b)); ]])],
 		[ AC_MSG_RESULT([yes]) ],
 		[ AC_MSG_RESULT([no])
 		  CFLAGS="$saved_CFLAGS" ]
 	)
 
 	# -fstack-protector-all doesn't always work for some GCC versions
 	# and/or platforms, so we test if we can.  If it's not supported
 	# on a given platform gcc will emit a warning so we use -Werror.
 	if test "x$use_stack_protector" = "x1"; then
 	    for t in -fstack-protector-strong -fstack-protector-all \
 		    -fstack-protector; do
 		AC_MSG_CHECKING([if $CC supports $t])
 		saved_CFLAGS="$CFLAGS"
 		saved_LDFLAGS="$LDFLAGS"
 		CFLAGS="$CFLAGS $t -Werror"
 		LDFLAGS="$LDFLAGS $t -Werror"
 		AC_LINK_IFELSE(
 			[AC_LANG_PROGRAM([[
 	#include <stdio.h>
 	int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
 			 ]],
 			[[
 	char x[256];
 	snprintf(x, sizeof(x), "XXX%d", func(1));
 			 ]])],
 		    [ AC_MSG_RESULT([yes])
 		      CFLAGS="$saved_CFLAGS $t"
 		      LDFLAGS="$saved_LDFLAGS $t"
 		      AC_MSG_CHECKING([if $t works])
 		      AC_RUN_IFELSE(
 			[AC_LANG_PROGRAM([[
 	#include <stdio.h>
 	int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
 			]],
 			[[
 	char x[256];
 	snprintf(x, sizeof(x), "XXX%d", func(1));
 			]])],
 			[ AC_MSG_RESULT([yes])
 			  break ],
 			[ AC_MSG_RESULT([no]) ],
 			[ AC_MSG_WARN([cross compiling: cannot test])
 			  break ]
 		      )
 		    ],
 		    [ AC_MSG_RESULT([no]) ]
 		)
 		CFLAGS="$saved_CFLAGS"
 		LDFLAGS="$saved_LDFLAGS"
 	    done
 	fi
 
 	if test -z "$have_llong_max"; then
 		# retry LLONG_MAX with -std=gnu99, needed on some Linuxes
 		unset ac_cv_have_decl_LLONG_MAX
 		saved_CFLAGS="$CFLAGS"
 		CFLAGS="$CFLAGS -std=gnu99"
 		AC_CHECK_DECL([LLONG_MAX],
 		    [have_llong_max=1],
 		    [CFLAGS="$saved_CFLAGS"],
 		    [#include <limits.h>]
 		)
 	fi
 fi
 
 AC_MSG_CHECKING([if compiler allows __attribute__ on return types])
 AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM([[
 #include <stdlib.h>
 __attribute__((__unused__)) static void foo(void){return;}]],
     [[ exit(0); ]])],
     [ AC_MSG_RESULT([yes]) ],
     [ AC_MSG_RESULT([no])
       AC_DEFINE(NO_ATTRIBUTE_ON_RETURN_TYPE, 1,
 	 [compiler does not accept __attribute__ on return types]) ]
 )
 
 AC_MSG_CHECKING([if compiler allows __attribute__ prototype args])
 AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM([[
 #include <stdlib.h>
 typedef void foo(const char *, ...) __attribute__((format(printf, 1, 2)));]],
     [[ exit(0); ]])],
     [ AC_MSG_RESULT([yes]) ],
     [ AC_MSG_RESULT([no])
       AC_DEFINE(NO_ATTRIBUTE_ON_PROTOTYPE_ARGS, 1,
 	 [compiler does not accept __attribute__ on prototype args]) ]
 )
 
 AC_MSG_CHECKING([if compiler supports variable length arrays])
 AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM([[#include <stdlib.h>]],
     [[ int i; for (i=0; i<3; i++){int a[i]; a[i-1]=0;} exit(0); ]])],
     [ AC_MSG_RESULT([yes])
       AC_DEFINE(VARIABLE_LENGTH_ARRAYS, [1],
 	 [compiler supports variable length arrays]) ],
     [ AC_MSG_RESULT([no]) ]
 )
 
 AC_MSG_CHECKING([if compiler accepts variable declarations after code])
 AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM([[#include <stdlib.h>]],
     [[ int a; a = 1; int b = 1; exit(a-b); ]])],
     [ AC_MSG_RESULT([yes])
       AC_DEFINE(VARIABLE_DECLARATION_AFTER_CODE, [1],
 	 [compiler variable declarations after code]) ],
     [ AC_MSG_RESULT([no]) ]
 )
 
 if test "x$no_attrib_nonnull" != "x1" ; then
 	AC_DEFINE([HAVE_ATTRIBUTE__NONNULL__], [1], [Have attribute nonnull])
 fi
 
 AC_ARG_WITH([rpath],
 	[  --without-rpath         Disable auto-added -R linker paths],
 	[
 		if test "x$withval" = "xno" ; then
 			rpath_opt=""
 		elif test "x$withval" = "xyes" ; then
 			rpath_opt="-R"
 		else
 			rpath_opt="$withval"
 		fi
 	]
 )
 
 # Allow user to specify flags
 AC_ARG_WITH([cflags],
 	[  --with-cflags           Specify additional flags to pass to compiler],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CFLAGS="$CFLAGS $withval"
 		fi
 	]
 )
 
 AC_ARG_WITH([cflags-after],
 	[  --with-cflags-after     Specify additional flags to pass to compiler after configure],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CFLAGS_AFTER="$withval"
 		fi
 	]
 )
 AC_ARG_WITH([cppflags],
 	[  --with-cppflags         Specify additional flags to pass to preprocessor] ,
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			CPPFLAGS="$CPPFLAGS $withval"
 		fi
 	]
 )
 AC_ARG_WITH([ldflags],
 	[  --with-ldflags          Specify additional flags to pass to linker],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LDFLAGS="$LDFLAGS $withval"
 		fi
 	]
 )
 AC_ARG_WITH([ldflags-after],
 	[  --with-ldflags-after    Specify additional flags to pass to linker after configure],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LDFLAGS_AFTER="$withval"
 		fi
 	]
 )
 AC_ARG_WITH([libs],
 	[  --with-libs             Specify additional libraries to link with],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			LIBS="$LIBS $withval"
 		fi
 	]
 )
 AC_ARG_WITH([Werror],
 	[  --with-Werror           Build main code with -Werror],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"; then
 			werror_flags="-Werror"
 			if test "x${withval}" != "xyes"; then
 				werror_flags="$withval"
 			fi
 		fi
 	]
 )
 
 dnl On some old platforms, sys/stat.h requires sys/types.h, but autoconf-2.71's
 dnl AC_CHECK_INCLUDES_DEFAULT checks for them in the opposite order.  If we
 dnl haven't detected it, recheck.
 if test "x$ac_cv_header_sys_stat_h" != "xyes"; then
 	unset ac_cv_header_sys_stat_h
 	AC_CHECK_HEADERS([sys/stat.h])
 fi
 
 AC_CHECK_HEADERS([ \
 	blf.h \
 	bstring.h \
 	crypt.h \
 	crypto/sha2.h \
 	dirent.h \
 	endian.h \
 	elf.h \
 	err.h \
 	features.h \
 	fcntl.h \
 	floatingpoint.h \
 	fnmatch.h \
 	getopt.h \
 	glob.h \
 	ia.h \
 	iaf.h \
 	ifaddrs.h \
 	inttypes.h \
 	langinfo.h \
 	limits.h \
 	locale.h \
 	login.h \
 	maillock.h \
 	ndir.h \
 	net/if_tun.h \
 	netdb.h \
 	netgroup.h \
 	pam/pam_appl.h \
 	paths.h \
 	poll.h \
 	pty.h \
 	readpassphrase.h \
 	rpc/types.h \
 	security/pam_appl.h \
 	sha2.h \
 	shadow.h \
 	stddef.h \
 	stdint.h \
 	string.h \
 	strings.h \
 	sys/bitypes.h \
 	sys/byteorder.h \
 	sys/bsdtty.h \
 	sys/cdefs.h \
 	sys/dir.h \
 	sys/file.h \
 	sys/mman.h \
 	sys/label.h \
 	sys/ndir.h \
 	sys/param.h \
 	sys/poll.h \
 	sys/prctl.h \
 	sys/procctl.h \
 	sys/pstat.h \
 	sys/ptrace.h \
 	sys/random.h \
 	sys/select.h \
 	sys/stream.h \
 	sys/stropts.h \
 	sys/strtio.h \
 	sys/statvfs.h \
 	sys/sysmacros.h \
 	sys/time.h \
 	sys/timers.h \
 	sys/vfs.h \
 	time.h \
 	tmpdir.h \
 	ttyent.h \
 	ucred.h \
 	unistd.h \
 	usersec.h \
 	util.h \
 	utime.h \
 	utmp.h \
 	utmpx.h \
 	vis.h \
 	wchar.h \
 ])
 
 # On some platforms (eg SunOS4) sys/audit.h requires sys/[time|types|label.h]
 # to be included first.
 AC_CHECK_HEADERS([sys/audit.h], [], [], [
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_LABEL_H
 # include <sys/label.h>
 #endif
 ])
 
 # sys/capsicum.h requires sys/types.h
 AC_CHECK_HEADERS([sys/capsicum.h capsicum_helpers.h], [], [], [
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 ])
 
 AC_MSG_CHECKING([for caph_cache_tzdata])
 AC_LINK_IFELSE(
     [AC_LANG_PROGRAM([[ #include <capsicum_helpers.h> ]],
 	[[caph_cache_tzdata();]])],
     [
 	AC_MSG_RESULT([yes])
 	AC_DEFINE([HAVE_CAPH_CACHE_TZDATA], [1],
 	    [Define if you have caph_cache_tzdata])
     ],
     [ AC_MSG_RESULT([no]) ]
 )
 
 # net/route.h requires sys/socket.h and sys/types.h.
 # sys/sysctl.h also requires sys/param.h
 AC_CHECK_HEADERS([net/route.h sys/sysctl.h], [], [], [
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <sys/param.h>
 #include <sys/socket.h>
 ])
 
 # lastlog.h requires sys/time.h to be included first on Solaris
 AC_CHECK_HEADERS([lastlog.h], [], [], [
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 ])
 
 # sys/ptms.h requires sys/stream.h to be included first on Solaris
 AC_CHECK_HEADERS([sys/ptms.h], [], [], [
 #ifdef HAVE_SYS_STREAM_H
 # include <sys/stream.h>
 #endif
 ])
 
 # login_cap.h requires sys/types.h on NetBSD
 AC_CHECK_HEADERS([login_cap.h], [], [], [
 #include <sys/types.h>
 ])
 
 # older BSDs need sys/param.h before sys/mount.h
 AC_CHECK_HEADERS([sys/mount.h], [], [], [
 #include <sys/param.h>
 ])
 
 # Android requires sys/socket.h to be included before sys/un.h
 AC_CHECK_HEADERS([sys/un.h], [], [], [
 #include <sys/types.h>
 #include <sys/socket.h>
 ])
 
 # Messages for features tested for in target-specific section
 SIA_MSG="no"
 SPC_MSG="no"
 SP_MSG="no"
 SPP_MSG="no"
 
 # Support for Solaris/Illumos privileges (this test is used by both
 # the --with-solaris-privs option and --with-sandbox=solaris).
 SOLARIS_PRIVS="no"
 
 # Check for some target-specific stuff
 case "$host" in
 *-*-aix*)
 	# Some versions of VAC won't allow macro redefinitions at
 	# -qlanglevel=ansi, and autoconf 2.60 sometimes insists on using that
 	# particularly with older versions of vac or xlc.
 	# It also throws errors about null macro arguments, but these are
 	# not fatal.
 	AC_MSG_CHECKING([if compiler allows macro redefinitions])
 	AC_COMPILE_IFELSE(
 	    [AC_LANG_PROGRAM([[
 #define testmacro foo
 #define testmacro bar]],
 	    [[ exit(0); ]])],
 	    [ AC_MSG_RESULT([yes]) ],
 	    [ AC_MSG_RESULT([no])
 	      CC="`echo $CC | sed 's/-qlanglvl\=ansi//g'`"
 	      CFLAGS="`echo $CFLAGS | sed 's/-qlanglvl\=ansi//g'`"
 	      CPPFLAGS="`echo $CPPFLAGS | sed 's/-qlanglvl\=ansi//g'`"
 	    ]
 	)
 
 	AC_MSG_CHECKING([how to specify blibpath for linker ($LD)])
 	if (test -z "$blibpath"); then
 		blibpath="/usr/lib:/lib"
 	fi
 	saved_LDFLAGS="$LDFLAGS"
 	if test "$GCC" = "yes"; then
 		flags="-Wl,-blibpath: -Wl,-rpath, -blibpath:"
 	else
 		flags="-blibpath: -Wl,-blibpath: -Wl,-rpath,"
 	fi
 	for tryflags in $flags ;do
 		if (test -z "$blibflags"); then
 			LDFLAGS="$saved_LDFLAGS $tryflags$blibpath"
 			AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
 			[blibflags=$tryflags], [])
 		fi
 	done
 	if (test -z "$blibflags"); then
 		AC_MSG_RESULT([not found])
 		AC_MSG_ERROR([*** must be able to specify blibpath on AIX - check config.log])
 	else
 		AC_MSG_RESULT([$blibflags])
 	fi
 	LDFLAGS="$saved_LDFLAGS"
 	dnl Check for authenticate.  Might be in libs.a on older AIXes
 	AC_CHECK_FUNC([authenticate], [AC_DEFINE([WITH_AIXAUTHENTICATE], [1],
 		[Define if you want to enable AIX4's authenticate function])],
 		[AC_CHECK_LIB([s], [authenticate],
 			[ AC_DEFINE([WITH_AIXAUTHENTICATE])
 				LIBS="$LIBS -ls"
 			])
 		])
 	dnl Check for various auth function declarations in headers.
 	AC_CHECK_DECLS([authenticate, loginrestrictions, loginsuccess,
 	    passwdexpired, setauthdb], , , [#include <usersec.h>])
 	dnl Check if loginfailed is declared and takes 4 arguments (AIX >= 5.2)
 	AC_CHECK_DECLS([loginfailed],
 	    [AC_MSG_CHECKING([if loginfailed takes 4 arguments])
 	    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <usersec.h> ]],
 		[[ (void)loginfailed("user","host","tty",0); ]])],
 		[AC_MSG_RESULT([yes])
 		AC_DEFINE([AIX_LOGINFAILED_4ARG], [1],
 			[Define if your AIX loginfailed() function
 			takes 4 arguments (AIX >= 5.2)])], [AC_MSG_RESULT([no])
 	    ])],
 	    [],
 	    [#include <usersec.h>]
 	)
 	AC_CHECK_FUNCS([getgrset setauthdb])
 	AC_CHECK_DECL([F_CLOSEM],
 	    AC_DEFINE([HAVE_FCNTL_CLOSEM], [1], [Use F_CLOSEM fcntl for closefrom]),
 	    [],
 	    [ #include <limits.h>
 	      #include <fcntl.h> ]
 	)
 	check_for_aix_broken_getaddrinfo=1
 	AC_DEFINE([SETEUID_BREAKS_SETUID], [1],
 	    [Define if your platform breaks doing a seteuid before a setuid])
 	AC_DEFINE([BROKEN_SETREUID], [1], [Define if your setreuid() is broken])
 	AC_DEFINE([BROKEN_SETREGID], [1], [Define if your setregid() is broken])
 	dnl AIX handles lastlog as part of its login message
 	AC_DEFINE([DISABLE_LASTLOG], [1], [Define if you don't want to use lastlog])
 	AC_DEFINE([LOGIN_NEEDS_UTMPX], [1],
 		[Some systems need a utmpx entry for /bin/login to work])
 	AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
 		[Define to a Set Process Title type if your system is
 		supported by bsd-setproctitle.c])
 	AC_DEFINE([SSHPAM_CHAUTHTOK_NEEDS_RUID], [1],
 	    [AIX 5.2 and 5.3 (and presumably newer) require this])
 	AC_DEFINE([PTY_ZEROREAD], [1], [read(1) can return 0 for a non-closed fd])
 	AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
 	AC_DEFINE([BROKEN_STRNDUP], 1, [strndup broken, see APAR IY61211])
 	AC_DEFINE([BROKEN_STRNLEN], 1, [strnlen broken, see APAR IY62551])
 	;;
 *-*-android*)
 	AC_DEFINE([DISABLE_UTMP], [1], [Define if you don't want to use utmp])
 	AC_DEFINE([DISABLE_WTMP], [1], [Define if you don't want to use wtmp])
 	;;
 *-*-cygwin*)
 	LIBS="$LIBS /usr/lib/textreadmode.o"
 	AC_DEFINE([HAVE_CYGWIN], [1], [Define if you are on Cygwin])
 	AC_DEFINE([USE_PIPES], [1], [Use PIPES instead of a socketpair()])
 	AC_DEFINE([NO_UID_RESTORATION_TEST], [1],
 		[Define to disable UID restoration test])
 	AC_DEFINE([DISABLE_SHADOW], [1],
 		[Define if you want to disable shadow passwords])
 	AC_DEFINE([NO_X11_UNIX_SOCKETS], [1],
 		[Define if X11 doesn't support AF_UNIX sockets on that system])
 	AC_DEFINE([DISABLE_FD_PASSING], [1],
 		[Define if your platform needs to skip post auth
 		file descriptor passing])
 	AC_DEFINE([SSH_IOBUFSZ], [65535], [Windows is sensitive to read buffer size])
 	AC_DEFINE([FILESYSTEM_NO_BACKSLASH], [1], [File names may not contain backslash characters])
 	# Cygwin defines optargs, optargs as declspec(dllimport) for historical
 	# reasons which cause compile warnings, so we disable those warnings.
 	OSSH_CHECK_CFLAG_COMPILE([-Wno-attributes])
 	;;
 *-*-dgux*)
 	AC_DEFINE([IP_TOS_IS_BROKEN], [1],
 		[Define if your system choked on IP TOS setting])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	;;
 *-*-darwin*)
 	use_pie=auto
 	AC_MSG_CHECKING([if we have working getaddrinfo])
 	AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <mach-o/dyld.h>
 #include <stdlib.h>
 int main(void) { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
 		exit(0);
 	else
 		exit(1);
 }
 			]])],
 	[AC_MSG_RESULT([working])],
 	[AC_MSG_RESULT([buggy])
 	AC_DEFINE([BROKEN_GETADDRINFO], [1],
 		[getaddrinfo is broken (if present)])
 	],
 	[AC_MSG_RESULT([assume it is working])])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([BROKEN_GLOB], [1], [OS X glob does not do what we expect])
 	AC_DEFINE_UNQUOTED([BIND_8_COMPAT], [1],
 		[Define if your resolver libs need this for getrrsetbyname])
 	AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
 	AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
 	    [Use tunnel device compatibility to OpenBSD])
 	AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
 	    [Prepend the address family to IP tunnel traffic])
 	m4_pattern_allow([AU_IPv])
 	AC_CHECK_DECL([AU_IPv4], [],
 	    AC_DEFINE([AU_IPv4], [0], [System only supports IPv4 audit records])
 	    [#include <bsm/audit.h>]
 	AC_DEFINE([LASTLOG_WRITE_PUTUTXLINE], [1],
 	    [Define if pututxline updates lastlog too])
 	)
 	AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
 		[Define to a Set Process Title type if your system is
 		supported by bsd-setproctitle.c])
 	AC_CHECK_FUNCS([sandbox_init])
 	AC_CHECK_HEADERS([sandbox.h])
 	AC_CHECK_LIB([sandbox], [sandbox_apply], [
 	    SSHDLIBS="$SSHDLIBS -lsandbox"
 	])
 	# proc_pidinfo()-based closefrom() replacement.
 	AC_CHECK_HEADERS([libproc.h])
 	AC_CHECK_FUNCS([proc_pidinfo])
 	# poll(2) is broken for character-special devices (at least).
 	# cf. Apple bug 3710161 (not public, but searchable)
 	AC_DEFINE([BROKEN_POLL], [1],
 	    [System poll(2) implementation is broken])
 	;;
 *-*-dragonfly*)
 	SSHDLIBS="$SSHDLIBS"
 	TEST_MALLOC_OPTIONS="AFGJPRX"
 	;;
 *-*-haiku*)
 	LIBS="$LIBS -lbsd "
 	CFLAGS="$CFLAGS -D_BSD_SOURCE"
 	AC_CHECK_LIB([network], [socket])
 	AC_DEFINE([HAVE_U_INT64_T])
 	AC_DEFINE([DISABLE_UTMPX], [1], [no utmpx])
 	MANTYPE=man
 	;;
 *-*-hpux*)
 	# first we define all of the options common to all HP-UX releases
 	CPPFLAGS="$CPPFLAGS -D_HPUX_SOURCE -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1"
 	IPADDR_IN_DISPLAY=yes
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([LOGIN_NEEDS_UTMPX])
 	AC_DEFINE([LOCKED_PASSWD_STRING], ["*"],
 		[String used in /etc/passwd to denote locked account])
 	AC_DEFINE([SPT_TYPE], [SPT_PSTAT])
 	AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
 	maildir="/var/mail"
 	LIBS="$LIBS -lsec"
 	AC_CHECK_LIB([xnet], [t_error], ,
 	    [AC_MSG_ERROR([*** -lxnet needed on HP-UX - check config.log ***])])
 
 	# next, we define all of the options specific to major releases
 	case "$host" in
 	*-*-hpux10*)
 		if test -z "$GCC"; then
 			CFLAGS="$CFLAGS -Ae"
 		fi
 		AC_DEFINE([BROKEN_GETLINE], [1], [getline is not what we expect])
 		;;
 	*-*-hpux11*)
 		AC_DEFINE([PAM_SUN_CODEBASE], [1],
 			[Define if you are using Solaris-derived PAM which
 			passes pam_messages to the conversation function
 			with an extra level of indirection])
 		AC_DEFINE([DISABLE_UTMP], [1],
 			[Define if you don't want to use utmp])
 		AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
 		check_for_hpux_broken_getaddrinfo=1
 		check_for_conflicting_getspnam=1
 		;;
 	esac
 
 	# lastly, we define options specific to minor releases
 	case "$host" in
 	*-*-hpux10.26)
 		AC_DEFINE([HAVE_SECUREWARE], [1],
 			[Define if you have SecureWare-based
 			protected password database])
 		disable_ptmx_check=yes
 		LIBS="$LIBS -lsecpw"
 		;;
 	esac
 	;;
 *-*-irix5*)
 	PATH="$PATH:/usr/etc"
 	AC_DEFINE([BROKEN_INET_NTOA], [1],
 		[Define if you system's inet_ntoa is busted
 		(e.g. Irix gcc issue)])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([WITH_ABBREV_NO_TTY], [1],
 		[Define if you shouldn't strip 'tty' from your
 		ttyname in [uw]tmp])
 	AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
 	;;
 *-*-irix6*)
 	PATH="$PATH:/usr/etc"
 	AC_DEFINE([WITH_IRIX_ARRAY], [1],
 		[Define if you have/want arrays
 		(cluster-wide session management, not C arrays)])
 	AC_DEFINE([WITH_IRIX_PROJECT], [1],
 		[Define if you want IRIX project management])
 	AC_DEFINE([WITH_IRIX_AUDIT], [1],
 		[Define if you want IRIX audit trails])
 	AC_CHECK_FUNC([jlimit_startjob], [AC_DEFINE([WITH_IRIX_JOBS], [1],
 		[Define if you want IRIX kernel jobs])])
 	AC_DEFINE([BROKEN_INET_NTOA])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([BROKEN_UPDWTMPX], [1], [updwtmpx is broken (if present)])
 	AC_DEFINE([WITH_ABBREV_NO_TTY])
 	AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
 	;;
 *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 	AC_DEFINE([PAM_TTY_KLUDGE])
 	AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"])
 	AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
 	AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
 	AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
 	;;
 *-*-linux*)
 	no_dev_ptmx=1
 	use_pie=auto
 	check_for_openpty_ctty_bug=1
 	dnl Target SUSv3/POSIX.1-2001 plus BSD specifics.
 	dnl _DEFAULT_SOURCE is the new name for _BSD_SOURCE
 	dnl _GNU_SOURCE is needed for setres*id prototypes.
 	CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE"
 	AC_DEFINE([BROKEN_CLOSEFROM], [1], [broken in chroots on older kernels])
 	AC_DEFINE([PAM_TTY_KLUDGE], [1],
 		[Work around problematic Linux PAM modules handling of PAM_TTY])
 	AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"],
 		[String used in /etc/passwd to denote locked account])
 	AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
 	AC_DEFINE([LINK_OPNOTSUPP_ERRNO], [EPERM],
 		[Define to whatever link() returns for "not supported"
 		if it doesn't return EOPNOTSUPP.])
 	AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
 	AC_DEFINE([USE_BTMP])
 	AC_DEFINE([LINUX_OOM_ADJUST], [1], [Adjust Linux out-of-memory killer])
 	inet6_default_4in6=yes
 	case `uname -r` in
 	1.*|2.0.*)
 		AC_DEFINE([BROKEN_CMSG_TYPE], [1],
 			[Define if cmsg_type is not passed correctly])
 		;;
 	esac
 	# tun(4) forwarding compat code
 	AC_CHECK_HEADERS([linux/if_tun.h])
 	if test "x$ac_cv_header_linux_if_tun_h" = "xyes" ; then
 		AC_DEFINE([SSH_TUN_LINUX], [1],
 		    [Open tunnel devices the Linux tun/tap way])
 		AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
 		    [Use tunnel device compatibility to OpenBSD])
 		AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
 		    [Prepend the address family to IP tunnel traffic])
 	fi
 	AC_CHECK_HEADER([linux/if.h],
 	    AC_DEFINE([SYS_RDOMAIN_LINUX], [1],
 		[Support routing domains using Linux VRF]), [], [
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 	    ])
 	AC_CHECK_HEADERS([linux/seccomp.h linux/filter.h linux/audit.h], [],
 	    [], [#include <linux/types.h>])
 	# Obtain MIPS ABI
 	case "$host" in
 	mips*)
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #if _MIPS_SIM != _ABIO32
 #error
 #endif
 			]])],[mips_abi="o32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #if _MIPS_SIM != _ABIN32
 #error
 #endif
 				]])],[mips_abi="n32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #if _MIPS_SIM != _ABI64
 #error
 #endif
 					]])],[mips_abi="n64"],[AC_MSG_ERROR([unknown MIPS ABI])
 				])
 			])
 		])
 		;;
 	esac
 	AC_MSG_CHECKING([for seccomp architecture])
 	seccomp_audit_arch=
 	case "$host" in
 	x86_64-*)
 		seccomp_audit_arch=AUDIT_ARCH_X86_64
 		;;
 	i*86-*)
 		seccomp_audit_arch=AUDIT_ARCH_I386
 		;;
 	arm*-*)
 		seccomp_audit_arch=AUDIT_ARCH_ARM
 		;;
 	aarch64*-*)
 		seccomp_audit_arch=AUDIT_ARCH_AARCH64
 		;;
 	s390x-*)
 		seccomp_audit_arch=AUDIT_ARCH_S390X
 		;;
 	s390-*)
 		seccomp_audit_arch=AUDIT_ARCH_S390
 		;;
 	powerpc-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC
 		;;
 	powerpc64-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC64
 		;;
 	powerpc64le-*)
 		seccomp_audit_arch=AUDIT_ARCH_PPC64LE
 		;;
 	mips-*)
 		seccomp_audit_arch=AUDIT_ARCH_MIPS
 		;;
 	mipsel-*)
 		seccomp_audit_arch=AUDIT_ARCH_MIPSEL
 		;;
 	mips64-*)
 		case "$mips_abi" in
 		"n32")
 			seccomp_audit_arch=AUDIT_ARCH_MIPS64N32
 			;;
 		"n64")
 			seccomp_audit_arch=AUDIT_ARCH_MIPS64
 			;;
 		esac
 		;;
 	mips64el-*)
 		case "$mips_abi" in
 		"n32")
 			seccomp_audit_arch=AUDIT_ARCH_MIPSEL64N32
 			;;
 		"n64")
 			seccomp_audit_arch=AUDIT_ARCH_MIPSEL64
 			;;
 		esac
 		;;
 	riscv64-*)
 		seccomp_audit_arch=AUDIT_ARCH_RISCV64
 		;;
 	esac
 	if test "x$seccomp_audit_arch" != "x" ; then
 		AC_MSG_RESULT(["$seccomp_audit_arch"])
 		AC_DEFINE_UNQUOTED([SECCOMP_AUDIT_ARCH], [$seccomp_audit_arch],
 		    [Specify the system call convention in use])
 	else
 		AC_MSG_RESULT([architecture not supported])
 	fi
 	;;
 *-*-minix)
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	# poll(2) seems to choke on /dev/null; "Bad file descriptor"
 	AC_DEFINE([BROKEN_POLL], [1],
 	    [System poll(2) implementation is broken])
 	;;
 mips-sony-bsd|mips-sony-newsos4)
 	AC_DEFINE([NEED_SETPGRP], [1], [Need setpgrp to acquire controlling tty])
 	SONY=1
 	;;
 *-*-netbsd*)
 	if test "x$withval" != "xno" ; then
 		rpath_opt="-R"
 	fi
 	CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
 	AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
 	AC_CHECK_HEADER([net/if_tap.h], ,
 	    AC_DEFINE([SSH_TUN_NO_L2], [1], [No layer 2 tunnel support]))
 	AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
 	    [Prepend the address family to IP tunnel traffic])
 	TEST_MALLOC_OPTIONS="AJRX"
 	AC_DEFINE([BROKEN_READ_COMPARISON], [1],
 	    [NetBSD read function is sometimes redirected, breaking atomicio comparisons against it])
 	;;
 *-*-freebsd*)
 	AC_DEFINE([LOCKED_PASSWD_PREFIX], ["*LOCKED*"], [Account locked with pw(1)])
 	AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
 	AC_CHECK_HEADER([net/if_tap.h], ,
 	    AC_DEFINE([SSH_TUN_NO_L2], [1], [No layer 2 tunnel support]))
 	AC_DEFINE([BROKEN_GLOB], [1], [FreeBSD glob does not do what we need])
 	TEST_MALLOC_OPTIONS="AJRX"
 	# Preauth crypto occasionally uses file descriptors for crypto offload
 	# and will crash if they cannot be opened.
 	AC_DEFINE([SANDBOX_SKIP_RLIMIT_NOFILE], [1],
 	    [define if setrlimit RLIMIT_NOFILE breaks things])
 	case "$host" in
 	*-*-freebsd9.*|*-*-freebsd10.*)
 		# Capsicum on 9 and 10 do not allow ppoll() so don't auto-enable.
 		disable_capsicum=yes
 	esac
 	;;
 *-*-bsdi*)
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	;;
 *-next-*)
 	conf_lastlog_location="/usr/adm/lastlog"
 	conf_utmp_location=/etc/utmp
 	conf_wtmp_location=/usr/adm/wtmp
 	maildir=/usr/spool/mail
 	AC_DEFINE([HAVE_NEXT], [1], [Define if you are on NeXT])
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([BROKEN_SAVED_UIDS], [1], [Needed for NeXT])
 	;;
 *-*-openbsd*)
 	use_pie=auto
 	AC_DEFINE([HAVE_ATTRIBUTE__SENTINEL__], [1], [OpenBSD's gcc has sentinel])
 	AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD's gcc has bounded])
 	AC_DEFINE([SSH_TUN_OPENBSD], [1], [Open tunnel devices the OpenBSD way])
 	AC_DEFINE([SYSLOG_R_SAFE_IN_SIGHAND], [1],
 	    [syslog_r function is safe to use in in a signal handler])
 	TEST_MALLOC_OPTIONS="AFGJPRX"
 	;;
 *-*-solaris*)
 	if test "x$withval" != "xno" ; then
 		rpath_opt="-R"
 	fi
 	AC_DEFINE([PAM_SUN_CODEBASE])
 	AC_DEFINE([LOGIN_NEEDS_UTMPX])
 	AC_DEFINE([PAM_TTY_KLUDGE])
 	AC_DEFINE([SSHPAM_CHAUTHTOK_NEEDS_RUID], [1],
 		[Define if pam_chauthtok wants real uid set
 		to the unpriv'ed user])
 	AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
 	# Pushing STREAMS modules will cause sshd to acquire a controlling tty.
 	AC_DEFINE([SSHD_ACQUIRES_CTTY], [1],
 		[Define if sshd somehow reacquires a controlling TTY
 		after setsid()])
 	AC_DEFINE([PASSWD_NEEDS_USERNAME], [1], [must supply username to passwd
 		in case the name is longer than 8 chars])
 	AC_DEFINE([BROKEN_TCGETATTR_ICANON], [1], [tcgetattr with ICANON may hang])
 	external_path_file=/etc/default/login
 	# hardwire lastlog location (can't detect it on some versions)
 	conf_lastlog_location="/var/adm/lastlog"
 	AC_MSG_CHECKING([for obsolete utmp and wtmp in solaris2.x])
 	sol2ver=`echo "$host"| sed -e 's/.*[[0-9]]\.//'`
 	if test "$sol2ver" -ge 8; then
 		AC_MSG_RESULT([yes])
 		AC_DEFINE([DISABLE_UTMP])
 		AC_DEFINE([DISABLE_WTMP], [1],
 			[Define if you don't want to use wtmp])
 	else
 		AC_MSG_RESULT([no])
 	fi
 	AC_CHECK_FUNCS([setpflags])
 	AC_CHECK_FUNCS([setppriv])
 	AC_CHECK_FUNCS([priv_basicset])
 	AC_CHECK_HEADERS([priv.h])
 	AC_ARG_WITH([solaris-contracts],
 		[  --with-solaris-contracts Enable Solaris process contracts (experimental)],
 		[
 		AC_CHECK_LIB([contract], [ct_tmpl_activate],
 			[ AC_DEFINE([USE_SOLARIS_PROCESS_CONTRACTS], [1],
 				[Define if you have Solaris process contracts])
 			  LIBS="$LIBS -lcontract"
 			  SPC_MSG="yes" ], )
 		],
 	)
 	AC_ARG_WITH([solaris-projects],
 		[  --with-solaris-projects Enable Solaris projects (experimental)],
 		[
 		AC_CHECK_LIB([project], [setproject],
 			[ AC_DEFINE([USE_SOLARIS_PROJECTS], [1],
 				[Define if you have Solaris projects])
 			LIBS="$LIBS -lproject"
 			SP_MSG="yes" ], )
 		],
 	)
 	AC_ARG_WITH([solaris-privs],
 		[  --with-solaris-privs    Enable Solaris/Illumos privileges (experimental)],
 		[
 		AC_MSG_CHECKING([for Solaris/Illumos privilege support])
 		if test "x$ac_cv_func_setppriv" = "xyes" -a \
 			"x$ac_cv_header_priv_h" = "xyes" ; then
 			SOLARIS_PRIVS=yes
 			AC_MSG_RESULT([found])
 			AC_DEFINE([NO_UID_RESTORATION_TEST], [1],
 				[Define to disable UID restoration test])
 			AC_DEFINE([USE_SOLARIS_PRIVS], [1],
 				[Define if you have Solaris privileges])
 			SPP_MSG="yes"
 		else
 			AC_MSG_RESULT([not found])
 			AC_MSG_ERROR([*** must have support for Solaris privileges to use --with-solaris-privs])
 		fi
 		],
 	)
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	;;
 *-*-sunos4*)
 	CPPFLAGS="$CPPFLAGS -DSUNOS4"
 	AC_CHECK_FUNCS([getpwanam])
 	AC_DEFINE([PAM_SUN_CODEBASE])
 	conf_utmp_location=/etc/utmp
 	conf_wtmp_location=/var/adm/wtmp
 	conf_lastlog_location=/var/adm/lastlog
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([DISABLE_UTMPX], [1], [no utmpx])
 	;;
 *-ncr-sysv*)
 	LIBS="$LIBS -lc89"
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([SSHD_ACQUIRES_CTTY])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	;;
 *-sni-sysv*)
 	# /usr/ucblib MUST NOT be searched on ReliantUNIX
 	AC_CHECK_LIB([dl], [dlsym], ,)
 	# -lresolv needs to be at the end of LIBS or DNS lookups break
 	AC_CHECK_LIB([resolv], [res_query], [ LIBS="$LIBS -lresolv" ])
 	IPADDR_IN_DISPLAY=yes
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([IP_TOS_IS_BROKEN])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([SSHD_ACQUIRES_CTTY])
 	external_path_file=/etc/default/login
 	# /usr/ucblib/libucb.a no longer needed on ReliantUNIX
 	# Attention: always take care to bind libsocket and libnsl before libc,
 	# otherwise you will find lots of "SIOCGPGRP errno 22" on syslog
 	;;
 # UnixWare 1.x, UnixWare 2.x, and others based on code from Univel.
 *-*-sysv4.2*)
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([PASSWD_NEEDS_USERNAME], [1], [must supply username to passwd])
 	AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	;;
 # UnixWare 7.x, OpenUNIX 8
 *-*-sysv5*)
 	CPPFLAGS="$CPPFLAGS -Dvsnprintf=_xvsnprintf -Dsnprintf=_xsnprintf"
 	AC_DEFINE([UNIXWARE_LONG_PASSWORDS], [1], [Support passwords > 8 chars])
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_GETADDRINFO])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([PASSWD_NEEDS_USERNAME])
 	AC_DEFINE([BROKEN_TCGETATTR_ICANON])
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	case "$host" in
 	*-*-sysv5SCO_SV*)	# SCO OpenServer 6.x
 		maildir=/var/spool/mail
 		AC_DEFINE([BROKEN_UPDWTMPX])
 		AC_CHECK_LIB([prot], [getluid], [ LIBS="$LIBS -lprot"
 			AC_CHECK_FUNCS([getluid setluid], , , [-lprot])
 			], , )
 		;;
 	*)	AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
 		;;
 	esac
 	;;
 *-*-sysv*)
 	;;
 # SCO UNIX and OEM versions of SCO UNIX
 *-*-sco3.2v4*)
 	AC_MSG_ERROR("This Platform is no longer supported.")
 	;;
 # SCO OpenServer 5.x
 *-*-sco3.2v5*)
 	if test -z "$GCC"; then
 		CFLAGS="$CFLAGS -belf"
 	fi
 	LIBS="$LIBS -lprot -lx -ltinfo -lm"
 	no_dev_ptmx=1
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([HAVE_SECUREWARE])
 	AC_DEFINE([DISABLE_SHADOW])
 	AC_DEFINE([DISABLE_FD_PASSING])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_GETADDRINFO])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([WITH_ABBREV_NO_TTY])
 	AC_DEFINE([BROKEN_UPDWTMPX])
 	AC_DEFINE([PASSWD_NEEDS_USERNAME])
 	AC_CHECK_FUNCS([getluid setluid])
 	MANTYPE=man
 	TEST_SHELL=$SHELL	# let configure find us a capable shell
 	SKIP_DISABLE_LASTLOG_DEFINE=yes
 	;;
 *-dec-osf*)
 	AC_MSG_CHECKING([for Digital Unix SIA])
 	no_osfsia=""
 	AC_ARG_WITH([osfsia],
 		[  --with-osfsia           Enable Digital Unix SIA],
 		[
 			if test "x$withval" = "xno" ; then
 				AC_MSG_RESULT([disabled])
 				no_osfsia=1
 			fi
 		],
 	)
 	if test -z "$no_osfsia" ; then
 		if test -f /etc/sia/matrix.conf; then
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([HAVE_OSF_SIA], [1],
 				[Define if you have Digital Unix Security
 				Integration Architecture])
 			AC_DEFINE([DISABLE_LOGIN], [1],
 				[Define if you don't want to use your
 				system's login() call])
 			AC_DEFINE([DISABLE_FD_PASSING])
 			LIBS="$LIBS -lsecurity -ldb -lm -laud"
 			SIA_MSG="yes"
 		else
 			AC_MSG_RESULT([no])
 			AC_DEFINE([LOCKED_PASSWD_SUBSTR], ["Nologin"],
 			  [String used in /etc/passwd to denote locked account])
 		fi
 	fi
 	AC_DEFINE([BROKEN_GETADDRINFO])
 	AC_DEFINE([SETEUID_BREAKS_SETUID])
 	AC_DEFINE([BROKEN_SETREUID])
 	AC_DEFINE([BROKEN_SETREGID])
 	AC_DEFINE([BROKEN_READV_COMPARISON], [1], [Can't do comparisons on readv])
 	;;
 
 *-*-nto-qnx*)
 	AC_DEFINE([USE_PIPES])
 	AC_DEFINE([NO_X11_UNIX_SOCKETS])
 	AC_DEFINE([DISABLE_LASTLOG])
 	AC_DEFINE([SSHD_ACQUIRES_CTTY])
 	AC_DEFINE([BROKEN_SHADOW_EXPIRE], [1], [QNX shadow support is broken])
 	enable_etc_default_login=no	# has incompatible /etc/default/login
 	case "$host" in
 	*-*-nto-qnx6*)
 		AC_DEFINE([DISABLE_FD_PASSING])
 		;;
 	esac
 	;;
 
 *-*-ultrix*)
 	AC_DEFINE([BROKEN_GETGROUPS], [1], [getgroups(0,NULL) will return -1])
 	AC_DEFINE([NEED_SETPGRP], [1], [Need setpgrp to for controlling tty])
 	AC_DEFINE([HAVE_SYS_SYSLOG_H], [1], [Force use of sys/syslog.h on Ultrix])
 	AC_DEFINE([DISABLE_UTMPX], [1], [Disable utmpx])
 	# DISABLE_FD_PASSING so that we call setpgrp as root, otherwise we
 	# don't get a controlling tty.
 	AC_DEFINE([DISABLE_FD_PASSING], [1], [Need to call setpgrp as root])
 	# On Ultrix some headers are not protected against multiple includes,
 	# so we create wrappers and put it where the compiler will find it.
 	AC_MSG_WARN([creating compat wrappers for headers])
 	mkdir -p netinet
 	for header in netinet/ip.h netdb.h resolv.h; do
 		name=`echo $header | tr 'a-z/.' 'A-Z__'`
 		cat >$header <<EOD
 #ifndef _SSH_COMPAT_${name}
 #define _SSH_COMPAT_${name}
 #include "/usr/include/${header}"
 #endif
 EOD
 	done
 	;;
 
 *-*-lynxos)
 	CFLAGS="$CFLAGS -D__NO_INCLUDE_WARN__"
 	AC_DEFINE([BROKEN_SETVBUF], [1],
 	    [LynxOS has broken setvbuf() implementation])
 	;;
 esac
 
 AC_MSG_CHECKING([compiler and flags for sanity])
 AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h> ]], [[ exit(0); ]])],
 	[	AC_MSG_RESULT([yes]) ],
 	[
 		AC_MSG_RESULT([no])
 		AC_MSG_ERROR([*** compiler cannot create working executables, check config.log ***])
 	],
 	[	AC_MSG_WARN([cross compiling: not checking compiler sanity]) ]
 )
 
 dnl Checks for header files.
 # Checks for libraries.
 AC_CHECK_FUNC([setsockopt], , [AC_CHECK_LIB([socket], [setsockopt])])
 
 dnl IRIX and Solaris 2.5.1 have dirname() in libgen
 AC_CHECK_FUNCS([dirname], [AC_CHECK_HEADERS([libgen.h])] , [
 	AC_CHECK_LIB([gen], [dirname], [
 		AC_CACHE_CHECK([for broken dirname],
 			ac_cv_have_broken_dirname, [
 			save_LIBS="$LIBS"
 			LIBS="$LIBS -lgen"
 			AC_RUN_IFELSE(
 				[AC_LANG_SOURCE([[
 #include <libgen.h>
 #include <string.h>
 #include <stdlib.h>
 
 int main(int argc, char **argv) {
     char *s, buf[32];
 
     strncpy(buf,"/etc", 32);
     s = dirname(buf);
     if (!s || strncmp(s, "/", 32) != 0) {
 	exit(1);
     } else {
 	exit(0);
     }
 }
 				]])],
 				[ ac_cv_have_broken_dirname="no" ],
 				[ ac_cv_have_broken_dirname="yes" ],
 				[ ac_cv_have_broken_dirname="no" ],
 			)
 			LIBS="$save_LIBS"
 		])
 		if test "x$ac_cv_have_broken_dirname" = "xno" ; then
 			LIBS="$LIBS -lgen"
 			AC_DEFINE([HAVE_DIRNAME])
 			AC_CHECK_HEADERS([libgen.h])
 		fi
 	])
 ])
 
 AC_CHECK_FUNC([getspnam], ,
 	[AC_CHECK_LIB([gen], [getspnam], [LIBS="$LIBS -lgen"])])
 AC_SEARCH_LIBS([basename], [gen], [AC_DEFINE([HAVE_BASENAME], [1],
 	[Define if you have the basename function.])])
 
 dnl zlib defaults to enabled
 zlib=yes
 AC_ARG_WITH([zlib],
 	[  --with-zlib=PATH        Use zlib in PATH],
 	[ if test "x$withval" = "xno" ; then
 		zlib=no
 	  elif test "x$withval" != "xyes"; then
 		if test -d "$withval/lib"; then
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval}/lib ${LDFLAGS}"
 			fi
 		else
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval} ${rpath_opt}${withval} ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval} ${LDFLAGS}"
 			fi
 		fi
 		if test -d "$withval/include"; then
 			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
 		else
 			CPPFLAGS="-I${withval} ${CPPFLAGS}"
 		fi
 	fi ]
 )
 
 # These libraries are needed for anything that links in the channel code.
 CHANNELLIBS=""
 AC_MSG_CHECKING([for zlib])
 if test "x${zlib}" = "xno"; then
 	AC_MSG_RESULT([no])
 else
     saved_LIBS="$LIBS"
     CHANNELLIBS="$CHANNELLIBS -lz"
     AC_MSG_RESULT([yes])
     AC_DEFINE([WITH_ZLIB], [1], [Enable zlib])
     AC_CHECK_HEADER([zlib.h], ,[AC_MSG_ERROR([*** zlib.h missing - please install first or check config.log ***])])
     AC_CHECK_LIB([z], [deflate], [],
 	[
 		saved_CPPFLAGS="$CPPFLAGS"
 		saved_LDFLAGS="$LDFLAGS"
 		dnl Check default zlib install dir
 		if test -n "${rpath_opt}"; then
 			LDFLAGS="-L/usr/local/lib ${rpath_opt}/usr/local/lib ${saved_LDFLAGS}"
 		else
 			LDFLAGS="-L/usr/local/lib ${saved_LDFLAGS}"
 		fi
 		CPPFLAGS="-I/usr/local/include ${saved_CPPFLAGS}"
 		AC_TRY_LINK_FUNC([deflate], [AC_DEFINE([HAVE_LIBZ])],
 			[
 				AC_MSG_ERROR([*** zlib missing - please install first or check config.log ***])
 			]
 		)
 	]
     )
 
     AC_ARG_WITH([zlib-version-check],
 	[  --without-zlib-version-check Disable zlib version check],
 	[  if test "x$withval" = "xno" ; then
 		zlib_check_nonfatal=1
 	   fi
 	]
     )
 
     AC_MSG_CHECKING([for possibly buggy zlib])
     AC_RUN_IFELSE([AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <zlib.h>
 	]],
 	[[
 	int a=0, b=0, c=0, d=0, n, v;
 	n = sscanf(ZLIB_VERSION, "%d.%d.%d.%d", &a, &b, &c, &d);
 	if (n < 1)
 		exit(1);
 	v = a*1000000 + b*10000 + c*100 + d;
 	fprintf(stderr, "found zlib version %s (%d)\n", ZLIB_VERSION, v);
 
 	/* 1.1.4 is OK */
 	if (a == 1 && b == 1 && c >= 4)
 		exit(0);
 
 	/* 1.2.3 and up are OK */
 	if (v >= 1020300)
 		exit(0);
 
 	exit(2);
 	]])],
 	AC_MSG_RESULT([no]),
 	[ AC_MSG_RESULT([yes])
 	  if test -z "$zlib_check_nonfatal" ; then
 		AC_MSG_ERROR([*** zlib too old - check config.log ***
 Your reported zlib version has known security problems.  It's possible your
 vendor has fixed these problems without changing the version number.  If you
 are sure this is the case, you can disable the check by running
 "./configure --without-zlib-version-check".
 If you are in doubt, upgrade zlib to version 1.2.3 or greater.
 See http://www.gzip.org/zlib/ for details.])
 	  else
 		AC_MSG_WARN([zlib version may have security problems])
 	  fi
 	],
 	[	AC_MSG_WARN([cross compiling: not checking zlib version]) ]
     )
     LIBS="$saved_LIBS"
 fi
 
 dnl UnixWare 2.x
 AC_CHECK_FUNC([strcasecmp],
 	[], [ AC_CHECK_LIB([resolv], [strcasecmp], [LIBS="$LIBS -lresolv"]) ]
 )
 AC_CHECK_FUNCS([utimes],
 	[], [ AC_CHECK_LIB([c89], [utimes], [AC_DEFINE([HAVE_UTIMES])
 					LIBS="$LIBS -lc89"]) ]
 )
 
 dnl    Checks for libutil functions
 AC_CHECK_HEADERS([bsd/libutil.h libutil.h])
 AC_SEARCH_LIBS([fmt_scaled], [util bsd])
 AC_SEARCH_LIBS([scan_scaled], [util bsd])
 AC_SEARCH_LIBS([login], [util bsd])
 AC_SEARCH_LIBS([logout], [util bsd])
 AC_SEARCH_LIBS([logwtmp], [util bsd])
 AC_SEARCH_LIBS([openpty], [util bsd])
 AC_SEARCH_LIBS([updwtmp], [util bsd])
 AC_CHECK_FUNCS([fmt_scaled scan_scaled login logout openpty updwtmp logwtmp])
 
 # On some platforms, inet_ntop and gethostbyname may be found in libresolv
 # or libnsl.
 AC_SEARCH_LIBS([inet_ntop], [resolv nsl])
 AC_SEARCH_LIBS([gethostbyname], [resolv nsl])
 
 # Some Linux distribtions ship the BSD libc hashing functions in
 # separate libraries.
 AC_SEARCH_LIBS([SHA256Update], [md bsd])
 
 # "Particular Function Checks"
 # see https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Particular-Functions.html
 AC_FUNC_STRFTIME
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 # autoconf doesn't have AC_FUNC_CALLOC so fake it if malloc returns NULL;
 AC_MSG_CHECKING([if calloc(0, N) returns non-null])
 AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM(
 		[[ #include <stdlib.h> ]],
 		[[ void *p = calloc(0, 1); exit(p == NULL); ]]
 	)],
 	[ func_calloc_0_nonnull=yes ],
 	[ func_calloc_0_nonnull=no ],
 	[ AC_MSG_WARN([cross compiling: assuming same as malloc])
 	  func_calloc_0_nonnull="$ac_cv_func_malloc_0_nonnull"]
 )
 AC_MSG_RESULT([$func_calloc_0_nonnull])
 
 if test "x$func_calloc_0_nonnull" = "xyes"; then
 	AC_DEFINE(HAVE_CALLOC, 1, [calloc(0, x) returns non-null])
 else
 	AC_DEFINE(HAVE_CALLOC, 0, [calloc(0, x) returns NULL])
 	AC_DEFINE(calloc, rpl_calloc,
 	    [Define to rpl_calloc if the replacement function should be used.])
 fi
 
 # Check for ALTDIRFUNC glob() extension
 AC_MSG_CHECKING([for GLOB_ALTDIRFUNC support])
 AC_EGREP_CPP([FOUNDIT],
 	[
 		#include <glob.h>
 		#ifdef GLOB_ALTDIRFUNC
 		FOUNDIT
 		#endif
 	],
 	[
 		AC_DEFINE([GLOB_HAS_ALTDIRFUNC], [1],
 			[Define if your system glob() function has
 			the GLOB_ALTDIRFUNC extension])
 		AC_MSG_RESULT([yes])
 	],
 	[
 		AC_MSG_RESULT([no])
 	]
 )
 
 # Check for g.gl_matchc glob() extension
 AC_MSG_CHECKING([for gl_matchc field in glob_t])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <glob.h> ]],
 	[[ glob_t g; g.gl_matchc = 1; ]])],
 	[
 		AC_DEFINE([GLOB_HAS_GL_MATCHC], [1],
 			[Define if your system glob() function has
 			gl_matchc options in glob_t])
 		AC_MSG_RESULT([yes])
 	], [
 		AC_MSG_RESULT([no])
 ])
 
 # Check for g.gl_statv glob() extension
 AC_MSG_CHECKING([for gl_statv and GLOB_KEEPSTAT extensions for glob])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <glob.h> ]], [[
 #ifndef GLOB_KEEPSTAT
 #error "glob does not support GLOB_KEEPSTAT extension"
 #endif
 glob_t g;
 g.gl_statv = NULL;
 ]])],
 	[
 		AC_DEFINE([GLOB_HAS_GL_STATV], [1],
 			[Define if your system glob() function has
 			gl_statv options in glob_t])
 		AC_MSG_RESULT([yes])
 	], [
 		AC_MSG_RESULT([no])
 
 ])
 
 AC_CHECK_DECLS([GLOB_NOMATCH], , , [#include <glob.h>])
 
 AC_CHECK_DECL([VIS_ALL], ,
     AC_DEFINE(BROKEN_STRNVIS, 1, [missing VIS_ALL]), [#include <vis.h>])
 
 AC_MSG_CHECKING([whether struct dirent allocates space for d_name])
 AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <dirent.h>
 #include <stdlib.h>
 	]],
 	[[
 	struct dirent d;
 	exit(sizeof(d.d_name)<=sizeof(char));
 	]])],
 	[AC_MSG_RESULT([yes])],
 	[
 		AC_MSG_RESULT([no])
 		AC_DEFINE([BROKEN_ONE_BYTE_DIRENT_D_NAME], [1],
 			[Define if your struct dirent expects you to
 			allocate extra space for d_name])
 	],
 	[
 		AC_MSG_WARN([cross compiling: assuming BROKEN_ONE_BYTE_DIRENT_D_NAME])
 		AC_DEFINE([BROKEN_ONE_BYTE_DIRENT_D_NAME])
 	]
 )
 
 AC_MSG_CHECKING([for /proc/pid/fd directory])
 if test -d "/proc/$$/fd" ; then
 	AC_DEFINE([HAVE_PROC_PID], [1], [Define if you have /proc/$pid/fd])
 	AC_MSG_RESULT([yes])
 else
 	AC_MSG_RESULT([no])
 fi
 
 # Check whether user wants to use ldns
 LDNS_MSG="no"
 AC_ARG_WITH(ldns,
 	[  --with-ldns[[=PATH]]      Use ldns for DNSSEC support (optionally in PATH)],
 	[
 	ldns=""
 	if test "x$withval" = "xyes" ; then
 		AC_PATH_TOOL([LDNSCONFIG], [ldns-config], [no])
 		if test "x$LDNSCONFIG" = "xno"; then
 			LIBS="-lldns $LIBS"
 			ldns=yes
 		else
 			LIBS="$LIBS `$LDNSCONFIG --libs`"
 			CPPFLAGS="$CPPFLAGS `$LDNSCONFIG --cflags`"
 			ldns=yes
 		fi
 	elif test "x$withval" != "xno" ; then
 			CPPFLAGS="$CPPFLAGS -I${withval}/include"
 			LDFLAGS="$LDFLAGS -L${withval}/lib"
 			LIBS="-lldns $LIBS"
 			ldns=yes
 	fi
 
 	# Verify that it works.
 	if test "x$ldns" = "xyes" ; then
 		AC_DEFINE(HAVE_LDNS, 1, [Define if you want ldns support])
 		LDNS_MSG="yes"
 		AC_MSG_CHECKING([for ldns support])
 		AC_LINK_IFELSE(
 			[AC_LANG_SOURCE([[
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <ldns/ldns.h>
 int main(void) { ldns_status status = ldns_verify_trusted(NULL, NULL, NULL, NULL); status=LDNS_STATUS_OK; exit(0); }
 			]])
 		],
 			[AC_MSG_RESULT(yes)],
 				[
 					AC_MSG_RESULT(no)
 					AC_MSG_ERROR([** Incomplete or missing ldns libraries.])
 				])
 	fi
 ])
 
 # Check whether user wants libedit support
 LIBEDIT_MSG="no"
 AC_ARG_WITH([libedit],
 	[  --with-libedit[[=PATH]]   Enable libedit support for sftp],
 	[ if test "x$withval" != "xno" ; then
 		if test "x$withval" = "xyes" ; then
 			if test "x$PKGCONFIG" != "xno"; then
 				AC_MSG_CHECKING([if $PKGCONFIG knows about libedit])
 				if "$PKGCONFIG" libedit; then
 					AC_MSG_RESULT([yes])
 					use_pkgconfig_for_libedit=yes
 				else
 					AC_MSG_RESULT([no])
 				fi
 			fi
 		else
 			CPPFLAGS="$CPPFLAGS -I${withval}/include"
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
 			else
 				LDFLAGS="-L${withval}/lib ${LDFLAGS}"
 			fi
 		fi
 		if test "x$use_pkgconfig_for_libedit" = "xyes"; then
 			LIBEDIT=`$PKGCONFIG --libs libedit`
 			CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libedit`"
 		else
 			LIBEDIT="-ledit -lcurses"
 		fi
 		OTHERLIBS=`echo $LIBEDIT | sed 's/-ledit//'`
 		AC_CHECK_LIB([edit], [el_init],
 			[ AC_DEFINE([USE_LIBEDIT], [1], [Use libedit for sftp])
 			  LIBEDIT_MSG="yes"
 			  AC_SUBST([LIBEDIT])
 			],
 			[ AC_MSG_ERROR([libedit not found]) ],
 			[ $OTHERLIBS ]
 		)
 		AC_MSG_CHECKING([if libedit version is compatible])
 		AC_COMPILE_IFELSE(
 		    [AC_LANG_PROGRAM([[
 #include <histedit.h>
 #include <stdlib.h>
 		    ]],
 		    [[
 	int i = H_SETSIZE;
 	el_init("", NULL, NULL, NULL);
 	exit(0);
 		    ]])],
 		    [ AC_MSG_RESULT([yes]) ],
 		    [ AC_MSG_RESULT([no])
 		      AC_MSG_ERROR([libedit version is not compatible]) ]
 		)
 	fi ]
 )
 
 AUDIT_MODULE=none
 AC_ARG_WITH([audit],
 	[  --with-audit=module     Enable audit support (modules=debug,bsm,linux)],
 	[
 	  AC_MSG_CHECKING([for supported audit module])
 	  case "$withval" in
 	  bsm)
 		AC_MSG_RESULT([bsm])
 		AUDIT_MODULE=bsm
 		dnl    Checks for headers, libs and functions
 		AC_CHECK_HEADERS([bsm/audit.h], [],
 		    [AC_MSG_ERROR([BSM enabled and bsm/audit.h not found])],
 		    [
 #ifdef HAVE_TIME_H
 # include <time.h>
 #endif
 		    ]
 )
 		AC_CHECK_LIB([bsm], [getaudit], [],
 		    [AC_MSG_ERROR([BSM enabled and required library not found])])
 		AC_CHECK_FUNCS([getaudit], [],
 		    [AC_MSG_ERROR([BSM enabled and required function not found])])
 		# These are optional
 		AC_CHECK_FUNCS([getaudit_addr aug_get_machine])
 		AC_DEFINE([USE_BSM_AUDIT], [1], [Use BSM audit module])
 		if test "$sol2ver" -ge 11; then
 			SSHDLIBS="$SSHDLIBS -lscf"
 			AC_DEFINE([BROKEN_BSM_API], [1],
 				[The system has incomplete BSM API])
 		fi
 		;;
 	  linux)
 		AC_MSG_RESULT([linux])
 		AUDIT_MODULE=linux
 		dnl    Checks for headers, libs and functions
 		AC_CHECK_HEADERS([libaudit.h])
 		SSHDLIBS="$SSHDLIBS -laudit"
 		AC_DEFINE([USE_LINUX_AUDIT], [1], [Use Linux audit module])
 		;;
 	  debug)
 		AUDIT_MODULE=debug
 		AC_MSG_RESULT([debug])
 		AC_DEFINE([SSH_AUDIT_EVENTS], [1], [Use audit debugging module])
 		;;
 	  no)
 		AC_MSG_RESULT([no])
 		;;
 	  *)
 		AC_MSG_ERROR([Unknown audit module $withval])
 		;;
 	esac ]
 )
 
 AC_ARG_WITH([pie],
     [  --with-pie              Build Position Independent Executables if possible], [
 	if test "x$withval" = "xno"; then
 		use_pie=no
 	fi
 	if test "x$withval" = "xyes"; then
 		use_pie=yes
 	fi
     ]
 )
 if test "x$use_pie" = "x"; then
 	use_pie=no
 fi
 if test "x$use_toolchain_hardening" != "x1" && test "x$use_pie" = "xauto"; then
 	# Turn off automatic PIE when toolchain hardening is off.
 	use_pie=no
 fi
 if test "x$use_pie" = "xauto"; then
 	# Automatic PIE requires gcc >= 4.x
 	AC_MSG_CHECKING([for gcc >= 4.x])
 	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #if !defined(__GNUC__) || __GNUC__ < 4
 #error gcc is too old
 #endif
 ]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_RESULT([no])
 	  use_pie=no ]
 )
 fi
 if test "x$use_pie" != "xno"; then
 	SAVED_CFLAGS="$CFLAGS"
 	SAVED_LDFLAGS="$LDFLAGS"
 	OSSH_CHECK_CFLAG_COMPILE([-fPIE])
 	OSSH_CHECK_LDFLAG_LINK([-pie])
 	# We use both -fPIE and -pie or neither.
 	AC_MSG_CHECKING([whether both -fPIE and -pie are supported])
 	if echo "x $CFLAGS"  | grep ' -fPIE' >/dev/null 2>&1 && \
 	   echo "x $LDFLAGS" | grep ' -pie'  >/dev/null 2>&1 ; then
 		AC_MSG_RESULT([yes])
 	else
 		AC_MSG_RESULT([no])
 		CFLAGS="$SAVED_CFLAGS"
 		LDFLAGS="$SAVED_LDFLAGS"
 	fi
 fi
 
 AC_MSG_CHECKING([whether -fPIC is accepted])
 SAVED_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fPIC"
 AC_COMPILE_IFELSE(
 	[AC_LANG_PROGRAM( [[ #include <stdlib.h> ]], [[ exit(0); ]] )],
    [AC_MSG_RESULT([yes])
     PICFLAG="-fPIC"; ],
    [AC_MSG_RESULT([no])
     PICFLAG=""; ])
 CFLAGS="$SAVED_CFLAGS"
 AC_SUBST([PICFLAG])
 
 dnl    Checks for library functions. Please keep in alphabetical order
 AC_CHECK_FUNCS([ \
 	Blowfish_initstate \
 	Blowfish_expandstate \
 	Blowfish_expand0state \
 	Blowfish_stream2word \
 	SHA256Update \
 	SHA384Update \
 	SHA512Update \
 	asprintf \
 	b64_ntop \
 	__b64_ntop \
 	b64_pton \
 	__b64_pton \
 	bcopy \
 	bcrypt_pbkdf \
 	bindresvport_sa \
 	blf_enc \
 	bzero \
 	cap_rights_limit \
 	clock \
 	closefrom \
 	close_range \
 	dirfd \
 	endgrent \
 	err \
 	errx \
 	explicit_bzero \
 	explicit_memset \
 	fchmod \
 	fchmodat \
 	fchown \
 	fchownat \
 	flock \
 	fnmatch \
 	freeaddrinfo \
 	freezero \
 	fstatfs \
 	fstatvfs \
 	futimes \
 	getaddrinfo \
 	getcwd \
 	getentropy \
 	getgrouplist \
 	getline \
 	getnameinfo \
 	getopt \
 	getpagesize \
 	getpeereid \
 	getpeerucred \
 	getpgid \
 	_getpty \
 	getrlimit \
 	getrandom \
 	getsid \
 	getttyent \
 	glob \
 	group_from_gid \
 	inet_aton \
 	inet_ntoa \
 	inet_ntop \
 	innetgr \
 	killpg \
 	llabs \
 	localtime_r \
 	login_getcapbool \
 	login_getpwclass \
 	memmem \
 	memmove \
 	memset_s \
 	mkdtemp \
 	ngetaddrinfo \
 	nsleep \
 	ogetaddrinfo \
 	openlog_r \
 	pledge \
 	poll \
 	ppoll \
 	prctl \
 	procctl \
 	pselect \
 	pstat \
 	raise \
 	readpassphrase \
 	reallocarray \
 	realpath \
 	recvmsg \
 	recallocarray \
 	rresvport_af \
 	sendmsg \
 	setdtablesize \
 	setegid \
 	setenv \
 	seteuid \
 	setgroupent \
 	setgroups \
 	setlinebuf \
 	setlogin \
 	setpassent\
 	setpcred \
 	setproctitle \
 	setregid \
 	setreuid \
 	setrlimit \
 	setsid \
 	setvbuf \
 	sigaction \
 	sigvec \
 	snprintf \
 	socketpair \
 	statfs \
 	statvfs \
 	strcasestr \
 	strdup \
 	strerror \
 	strlcat \
 	strlcpy \
 	strmode \
 	strndup \
 	strnlen \
 	strnvis \
 	strptime \
 	strsignal \
 	strtonum \
 	strtoll \
 	strtoul \
 	strtoull \
 	swap32 \
 	sysconf \
 	tcgetpgrp \
 	timegm \
 	timingsafe_bcmp \
 	truncate \
 	unsetenv \
 	updwtmpx \
 	utimensat \
 	user_from_uid \
 	usleep \
 	vasprintf \
 	vsnprintf \
 	waitpid \
 	warn \
 ])
 
 AC_CHECK_DECLS([bzero, memmem])
 
 dnl Wide character support.
 AC_CHECK_FUNCS([mblen mbtowc nl_langinfo wcwidth])
 
 TEST_SSH_UTF8=${TEST_SSH_UTF8:=yes}
 AC_MSG_CHECKING([for utf8 locale support])
 AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <locale.h>
 #include <stdlib.h>
 	]], [[
 	char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
 	if (loc != NULL)
 		exit(0);
 	exit(1);
 	]])],
 	AC_MSG_RESULT(yes),
 	[AC_MSG_RESULT(no)
 	 TEST_SSH_UTF8=no],
 	AC_MSG_WARN([cross compiling: assuming yes])
 )
 
 AC_LINK_IFELSE(
         [AC_LANG_PROGRAM(
            [[ #include <ctype.h> ]],
            [[ return (isblank('a')); ]])],
 	[AC_DEFINE([HAVE_ISBLANK], [1], [Define if you have isblank(3C).])
 ])
 
 disable_pkcs11=
 AC_ARG_ENABLE([pkcs11],
 	[  --disable-pkcs11        disable PKCS#11 support code [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			disable_pkcs11=1
 		fi
 	]
 )
 
 disable_sk=
 AC_ARG_ENABLE([security-key],
 	[  --disable-security-key  disable U2F/FIDO support code [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			disable_sk=1
 		fi
 	]
 )
 enable_sk_internal=
 AC_ARG_WITH([security-key-builtin],
 	[  --with-security-key-builtin include builtin U2F/FIDO support],
 	[ enable_sk_internal=$withval ]
 )
 
+disable_ecdsa=
+AC_ARG_ENABLE([dsa-keys],
+	[  --disable-dsa-keys      disable DSA key support [no]],
+	[
+		if test "x$enableval" = "xno" ; then
+			disable_ecdsa=1
+		fi
+	]
+)
+test -z "$disable_ecdsa" &&
+    AC_DEFINE([WITH_DSA], [1], [Define if to enable DSA keys.])
+
 AC_SEARCH_LIBS([dlopen], [dl])
 AC_CHECK_FUNCS([dlopen])
 AC_CHECK_DECL([RTLD_NOW], [], [], [#include <dlfcn.h>])
 
 # IRIX has a const char return value for gai_strerror()
 AC_CHECK_FUNCS([gai_strerror], [
 	AC_DEFINE([HAVE_GAI_STRERROR])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 
 const char *gai_strerror(int);
 			]], [[
 	char *str;
 	str = gai_strerror(0);
 			]])], [
 		AC_DEFINE([HAVE_CONST_GAI_STRERROR_PROTO], [1],
 		[Define if gai_strerror() returns const char *])], [])])
 
 AC_SEARCH_LIBS([nanosleep], [rt posix4], [AC_DEFINE([HAVE_NANOSLEEP], [1],
 	[Some systems put nanosleep outside of libc])])
 
 AC_SEARCH_LIBS([clock_gettime], [rt],
 	[AC_DEFINE([HAVE_CLOCK_GETTIME], [1], [Have clock_gettime])])
 
 dnl check if we need -D_REENTRANT for localtime_r declaration.
 AC_CHECK_DECL([localtime_r], [],
 	[ saved_CPPFLAGS="$CPPFLAGS"
 	  CPPFLAGS="$CPPFLAGS -D_REENTRANT"
 	  unset ac_cv_have_decl_localtime_r
 	  AC_CHECK_DECL([localtime_r], [],
 		[ CPPFLAGS="$saved_CPPFLAGS" ],
 		[ #include <time.h> ]
 	  )
 	],
 	[ #include <time.h> ]
 )
 
 dnl Make sure prototypes are defined for these before using them.
 AC_CHECK_DECL([strsep],
 	[AC_CHECK_FUNCS([strsep])],
 	[],
 	[
 #ifdef HAVE_STRING_H
 # include <string.h>
 #endif
 	])
 
 dnl tcsendbreak might be a macro
 AC_CHECK_DECL([tcsendbreak],
 	[AC_DEFINE([HAVE_TCSENDBREAK])],
 	[AC_CHECK_FUNCS([tcsendbreak])],
 	[#include <termios.h>]
 )
 
 AC_CHECK_DECLS([h_errno], , ,[#include <netdb.h>])
 
 AC_CHECK_DECLS([SHUT_RD, getpeereid], , ,
 	[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <unistd.h>
 	])
 
 AC_CHECK_DECLS([O_NONBLOCK], , ,
 	[
 #include <sys/types.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef HAVE_FCNTL_H
 # include <fcntl.h>
 #endif
 	])
 
 AC_CHECK_DECLS([ftruncate, getentropy], , ,
 	[
 #include <sys/types.h>
 #include <unistd.h>
 	])
 
 AC_CHECK_DECLS([readv, writev], , , [
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <unistd.h>
 	])
 
 AC_CHECK_DECLS([MAXSYMLINKS], , , [
 #include <sys/param.h>
 	])
 
 AC_CHECK_DECLS([offsetof], , , [
 #include <stddef.h>
 	])
 
 # extra bits for select(2)
 AC_CHECK_DECLS([howmany, NFDBITS], [], [], [[
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SYSMACROS_H
 #include <sys/sysmacros.h>
 #endif
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 	]])
 AC_CHECK_TYPES([fd_mask], [], [], [[
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 	]])
 
 AC_CHECK_FUNCS([setresuid], [
 	dnl Some platorms have setresuid that isn't implemented, test for this
 	AC_MSG_CHECKING([if setresuid seems to work])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 		]], [[
 	errno=0;
 	setresuid(0,0,0);
 	if (errno==ENOSYS)
 		exit(1);
 	else
 		exit(0);
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[AC_DEFINE([BROKEN_SETRESUID], [1],
 			[Define if your setresuid() is broken])
 		 AC_MSG_RESULT([not implemented])],
 		[AC_MSG_WARN([cross compiling: not checking setresuid])]
 	)
 ])
 
 AC_CHECK_FUNCS([setresgid], [
 	dnl Some platorms have setresgid that isn't implemented, test for this
 	AC_MSG_CHECKING([if setresgid seems to work])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 		]], [[
 	errno=0;
 	setresgid(0,0,0);
 	if (errno==ENOSYS)
 		exit(1);
 	else
 		exit(0);
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[AC_DEFINE([BROKEN_SETRESGID], [1],
 			[Define if your setresgid() is broken])
 		 AC_MSG_RESULT([not implemented])],
 		[AC_MSG_WARN([cross compiling: not checking setresuid])]
 	)
 ])
 
 AC_MSG_CHECKING([for working fflush(NULL)])
 AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 	]],
 	[[fflush(NULL); exit(0);]])],
 	AC_MSG_RESULT([yes]),
 	[AC_MSG_RESULT([no])
 	 AC_DEFINE([FFLUSH_NULL_BUG], [1],
 	    [define if fflush(NULL) does not work])],
 	AC_MSG_WARN([cross compiling: assuming working])
 )
 
 dnl    Checks for time functions
 AC_CHECK_FUNCS([gettimeofday time])
 dnl    Checks for utmp functions
 AC_CHECK_FUNCS([endutent getutent getutid getutline pututline setutent])
 AC_CHECK_FUNCS([utmpname])
 dnl    Checks for utmpx functions
 AC_CHECK_FUNCS([endutxent getutxent getutxid getutxline getutxuser pututxline])
 AC_CHECK_FUNCS([setutxdb setutxent utmpxname])
 dnl    Checks for lastlog functions
 AC_CHECK_FUNCS([getlastlogxbyname])
 
 AC_CHECK_FUNC([daemon],
 	[AC_DEFINE([HAVE_DAEMON], [1], [Define if your libraries define daemon()])],
 	[AC_CHECK_LIB([bsd], [daemon],
 		[LIBS="$LIBS -lbsd"; AC_DEFINE([HAVE_DAEMON])])]
 )
 
 AC_CHECK_FUNC([getpagesize],
 	[AC_DEFINE([HAVE_GETPAGESIZE], [1],
 		[Define if your libraries define getpagesize()])],
 	[AC_CHECK_LIB([ucb], [getpagesize],
 		[LIBS="$LIBS -lucb"; AC_DEFINE([HAVE_GETPAGESIZE])])]
 )
 
 # Check for broken snprintf
 if test "x$ac_cv_func_snprintf" = "xyes" ; then
 	AC_MSG_CHECKING([whether snprintf correctly terminates long strings])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 		]],
 		[[
 	char b[5];
 	snprintf(b,5,"123456789");
 	exit(b[4]!='\0');
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([BROKEN_SNPRINTF], [1],
 				[Define if your snprintf is busted])
 			AC_MSG_WARN([****** Your snprintf() function is broken, complain to your vendor])
 		],
 		[ AC_MSG_WARN([cross compiling: Assuming working snprintf()]) ]
 	)
 fi
 
 if test "x$ac_cv_func_snprintf" = "xyes" ; then
 	AC_MSG_CHECKING([whether snprintf understands %zu])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 		]],
 		[[
 	size_t a = 1, b = 2;
 	char z[128];
 	snprintf(z, sizeof z, "%zu%zu", a, b);
 	exit(strcmp(z, "12"));
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([BROKEN_SNPRINTF], [1],
 				[snprintf does not understand %zu])
 		],
 		[ AC_MSG_WARN([cross compiling: Assuming working snprintf()]) ]
 	)
 fi
 
 # We depend on vsnprintf returning the right thing on overflow: the
 # number of characters it tried to create (as per SUSv3)
 if test "x$ac_cv_func_vsnprintf" = "xyes" ; then
 	AC_MSG_CHECKING([whether vsnprintf returns correct values on overflow])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdarg.h>
 
 int x_snprintf(char *str, size_t count, const char *fmt, ...)
 {
 	size_t ret;
 	va_list ap;
 
 	va_start(ap, fmt);
 	ret = vsnprintf(str, count, fmt, ap);
 	va_end(ap);
 	return ret;
 }
 		]], [[
 char x[1];
 if (x_snprintf(x, 1, "%s %d", "hello", 12345) != 11)
 	return 1;
 if (x_snprintf(NULL, 0, "%s %d", "hello", 12345) != 11)
 	return 1;
 return 0;
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([BROKEN_SNPRINTF], [1],
 				[Define if your snprintf is busted])
 			AC_MSG_WARN([****** Your vsnprintf() function is broken, complain to your vendor])
 		],
 		[ AC_MSG_WARN([cross compiling: Assuming working vsnprintf()]) ]
 	)
 fi
 
 # On systems where [v]snprintf is broken, but is declared in stdio,
 # check that the fmt argument is const char * or just char *.
 # This is only useful for when BROKEN_SNPRINTF
 AC_MSG_CHECKING([whether snprintf can declare const char *fmt])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <stdio.h>
 int snprintf(char *a, size_t b, const char *c, ...) { return 0; }
 		]], [[
 	snprintf(0, 0, 0);
 		]])],
    [AC_MSG_RESULT([yes])
     AC_DEFINE([SNPRINTF_CONST], [const],
               [Define as const if snprintf() can declare const char *fmt])],
    [AC_MSG_RESULT([no])
     AC_DEFINE([SNPRINTF_CONST], [/* not const */])])
 
 # Check for missing getpeereid (or equiv) support
 NO_PEERCHECK=""
 if test "x$ac_cv_func_getpeereid" != "xyes" -a "x$ac_cv_func_getpeerucred" != "xyes"; then
 	AC_MSG_CHECKING([whether system supports SO_PEERCRED getsockopt])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>]], [[int i = SO_PEERCRED;]])],
 		[ AC_MSG_RESULT([yes])
 		  AC_DEFINE([HAVE_SO_PEERCRED], [1], [Have PEERCRED socket option])
 		], [AC_MSG_RESULT([no])
 		NO_PEERCHECK=1
         ])
 fi
 
 dnl make sure that openpty does not reacquire controlling terminal
 if test ! -z "$check_for_openpty_ctty_bug"; then
 	AC_MSG_CHECKING([if openpty correctly handles controlling tty])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #ifdef HAVE_PTY_H
 # include <pty.h>
 #endif
 #include <sys/fcntl.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 		]], [[
 	pid_t pid;
 	int fd, ptyfd, ttyfd, status;
 
 	pid = fork();
 	if (pid < 0) {		/* failed */
 		exit(1);
 	} else if (pid > 0) {	/* parent */
 		waitpid(pid, &status, 0);
 		if (WIFEXITED(status))
 			exit(WEXITSTATUS(status));
 		else
 			exit(2);
 	} else {		/* child */
 		close(0); close(1); close(2);
 		setsid();
 		openpty(&ptyfd, &ttyfd, NULL, NULL, NULL);
 		fd = open("/dev/tty", O_RDWR | O_NOCTTY);
 		if (fd >= 0)
 			exit(3);	/* Acquired ctty: broken */
 		else
 			exit(0);	/* Did not acquire ctty: OK */
 	}
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([SSHD_ACQUIRES_CTTY])
 		],
 		[
 			AC_MSG_RESULT([cross-compiling, assuming yes])
 		]
 	)
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
     test "x$check_for_hpux_broken_getaddrinfo" = "x1"; then
 	AC_MSG_CHECKING([if getaddrinfo seems to work])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <errno.h>
 #include <netinet/in.h>
 
 #define TEST_PORT "2222"
 		]], [[
 	int err, sock;
 	struct addrinfo *gai_ai, *ai, hints;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
 
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = PF_UNSPEC;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_PASSIVE;
 
 	err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
 	if (err != 0) {
 		fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
 		exit(1);
 	}
 
 	for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET6)
 			continue;
 
 		err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
 		    sizeof(ntop), strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV);
 
 		if (err != 0) {
 			if (err == EAI_SYSTEM)
 				perror("getnameinfo EAI_SYSTEM");
 			else
 				fprintf(stderr, "getnameinfo failed: %s\n",
 				    gai_strerror(err));
 			exit(2);
 		}
 
 		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (sock < 0)
 			perror("socket");
 		if (bind(sock, ai->ai_addr, ai->ai_addrlen) < 0) {
 			if (errno == EBADF)
 				exit(3);
 		}
 	}
 	exit(0);
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([BROKEN_GETADDRINFO])
 		],
 		[
 			AC_MSG_RESULT([cross-compiling, assuming yes])
 		]
 	)
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
     test "x$check_for_aix_broken_getaddrinfo" = "x1"; then
 	AC_MSG_CHECKING([if getaddrinfo seems to work])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <errno.h>
 #include <netinet/in.h>
 
 #define TEST_PORT "2222"
 		]], [[
 	int err, sock;
 	struct addrinfo *gai_ai, *ai, hints;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
 
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = PF_UNSPEC;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_PASSIVE;
 
 	err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
 	if (err != 0) {
 		fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
 		exit(1);
 	}
 
 	for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
 			continue;
 
 		err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
 		    sizeof(ntop), strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV);
 
 		if (ai->ai_family == AF_INET && err != 0) {
 			perror("getnameinfo");
 			exit(2);
 		}
 	}
 	exit(0);
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([AIX_GETNAMEINFO_HACK], [1],
 				[Define if you have a getaddrinfo that fails
 				for the all-zeros IPv6 address])
 		],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([BROKEN_GETADDRINFO])
 		],
 		[
 			AC_MSG_RESULT([cross-compiling, assuming no])
 		]
 	)
 fi
 
 if test "x$ac_cv_func_getaddrinfo" = "xyes"; then
 	AC_CHECK_DECLS(AI_NUMERICSERV, , ,
 	    [#include <sys/types.h>
 	     #include <sys/socket.h>
 	     #include <netdb.h>])
 fi
 
 if test "x$check_for_conflicting_getspnam" = "x1"; then
 	AC_MSG_CHECKING([for conflicting getspnam in shadow.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <shadow.h>
 #include <stdlib.h>
 		]],
 		[[ exit(0); ]])],
 		[
 			AC_MSG_RESULT([no])
 		],
 		[
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([GETSPNAM_CONFLICTING_DEFS], [1],
 			    [Conflicting defs for getspnam])
 		]
 	)
 fi
 
 dnl NetBSD added an strnvis and unfortunately made it incompatible with the
 dnl existing one in OpenBSD and Linux's libbsd (the former having existed
 dnl for over ten years). Despite this incompatibility being reported during
 dnl development (see http://gnats.netbsd.org/44977) they still shipped it.
 dnl Even more unfortunately FreeBSD and later MacOS picked up this incompatible
 dnl implementation.  Try to detect this mess, and assume the only safe option
 dnl if we're cross compiling.
 dnl
 dnl OpenBSD, 2001: strnvis(char *dst, const char *src, size_t dlen, int flag);
 dnl NetBSD: 2012,  strnvis(char *dst, size_t dlen, const char *src, int flag);
 if test "x$ac_cv_func_strnvis" = "xyes"; then
 	AC_MSG_CHECKING([for working strnvis])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <vis.h>
 static void sighandler(int sig) { _exit(1); }
 		]], [[
 	char dst[16];
 
 	signal(SIGSEGV, sighandler);
 	if (strnvis(dst, "src", 4, 0) && strcmp(dst, "src") == 0)
 		exit(0);
 	exit(1)
 		]])],
 		[AC_MSG_RESULT([yes])],
 		[AC_MSG_RESULT([no])
 		 AC_DEFINE([BROKEN_STRNVIS], [1], [strnvis detected broken])],
 		[AC_MSG_WARN([cross compiling: assuming broken])
 		 AC_DEFINE([BROKEN_STRNVIS], [1], [strnvis assumed broken])]
 	)
 fi
 
 AC_MSG_CHECKING([if SA_RESTARTed signals interrupt select()])
 AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #ifdef HAVE_SYS_SELECT
 # include <sys/select.h>
 #endif
 #include <sys/types.h>
 #include <sys/time.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <unistd.h>
 static void sighandler(int sig) { }
 		]], [[
 	int r;
 	pid_t pid;
 	struct sigaction sa;
 
 	sa.sa_handler = sighandler;
 	sa.sa_flags = SA_RESTART;
 	(void)sigaction(SIGTERM, &sa, NULL);
 	if ((pid = fork()) == 0) { /* child */
 		pid = getppid();
 		sleep(1);
 		kill(pid, SIGTERM);
 		sleep(1);
 		if (getppid() == pid) /* if parent did not exit, shoot it */
 			kill(pid, SIGKILL);
 		exit(0);
 	} else { /* parent */
 		r = select(0, NULL, NULL, NULL, NULL);
 	}
 	exit(r == -1 ? 0 : 1);
 	]])],
 	[AC_MSG_RESULT([yes])],
 	[AC_MSG_RESULT([no])
 	 AC_DEFINE([NO_SA_RESTART], [1],
 	    [SA_RESTARTed signals do no interrupt select])],
 	[AC_MSG_WARN([cross compiling: assuming yes])]
 )
 
 AC_CHECK_FUNCS([getpgrp],[
 	AC_MSG_CHECKING([if getpgrp accepts zero args])
 	AC_COMPILE_IFELSE(
 		[AC_LANG_PROGRAM([[$ac_includes_default]], [[ getpgrp(); ]])],
 		[ AC_MSG_RESULT([yes])
 		  AC_DEFINE([GETPGRP_VOID], [1], [getpgrp takes zero args])],
 		[ AC_MSG_RESULT([no])
 		  AC_DEFINE([GETPGRP_VOID], [0], [getpgrp takes one arg])]
 	)
 ])
 
 # Search for OpenSSL
 saved_CPPFLAGS="$CPPFLAGS"
 saved_LDFLAGS="$LDFLAGS"
 openssl_bin_PATH="$PATH"
 AC_ARG_WITH([ssl-dir],
 	[  --with-ssl-dir=PATH     Specify path to OpenSSL installation ],
 	[
 		if test "x$openssl" = "xno" ; then
 			AC_MSG_ERROR([cannot use --with-ssl-dir when OpenSSL disabled])
 		fi
 		if test "x$withval" != "xno" ; then
 			case "$withval" in
 				# Relative paths
 				./*|../*)	withval="`pwd`/$withval"
 			esac
 			if test -d "$withval/lib"; then
 				libcrypto_path="${withval}/lib"
 			elif test -d "$withval/lib64"; then
 				libcrypto_path="$withval/lib64"
 			else
 				# Built but not installed
 				libcrypto_path="${withval}"
 			fi
 			if test -n "${rpath_opt}"; then
 				LDFLAGS="-L${libcrypto_path} ${rpath_opt}${libcrypto_path} ${LDFLAGS}"
 			else
 				LDFLAGS="-L${libcrypto_path} ${LDFLAGS}"
 			fi
 			if test -d "$withval/include"; then
 				CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
 			else
 				CPPFLAGS="-I${withval} ${CPPFLAGS}"
 			fi
-			openssl_bin_PATH="${PATH}${PATH_SEPARATOR}${withval}/bin${PATH_SEPARATOR}${withval}/apps"
+			dnl Ensure specified openssl binary works, eg it can
+			dnl find its runtime libraries, before trying to use.
+			if test -x "${withval}/bin/openssl" && \
+			    "${withval}/bin/openssl" version >/dev/null 2>&1; then
+				openssl_bin_PATH="${withval}/bin${PATH_SEPARATOR}${PATH}"
+			elif test -x "${withval}/apps/openssl" && \
+			    "${withval}/apps/openssl" version >/dev/null 2>&1; then
+				openssl_bin_PATH="${withval}/apps${PATH_SEPARATOR}${PATH}"
+			fi
 		fi
 	]
 )
 AC_PATH_PROGS([openssl_bin], openssl, [], [$openssl_bin_PATH])
 AC_SUBST(OPENSSL_BIN, [${openssl_bin}])
 
 AC_ARG_WITH([openssl-header-check],
 	[  --without-openssl-header-check Disable OpenSSL version consistency check],
 	[
 		if test "x$withval" = "xno" ; then
 			openssl_check_nonfatal=1
 		fi
 	]
 )
 
 openssl_engine=no
 AC_ARG_WITH([ssl-engine],
 	[  --with-ssl-engine       Enable OpenSSL (hardware) ENGINE support ],
 	[
 		if test "x$withval" != "xno" ; then
 			if test "x$openssl" = "xno" ; then
 				AC_MSG_ERROR([cannot use --with-ssl-engine when OpenSSL disabled])
 			fi
 			openssl_engine=yes
 		fi
 	]
 )
 
 nocrypto_saved_LIBS="$LIBS"
 if test "x$openssl" = "xyes" ; then
 	LIBS="-lcrypto $LIBS"
 	CHANNELLIBS="-lcrypto $CHANNELLIBS"
 	AC_TRY_LINK_FUNC([RAND_add], ,
 	    [AC_MSG_ERROR([*** working libcrypto not found, check config.log])])
 	AC_CHECK_HEADER([openssl/opensslv.h], ,
 	    [AC_MSG_ERROR([*** OpenSSL headers missing - please install first or check config.log ***])])
 
 	# Determine OpenSSL header version
 	AC_MSG_CHECKING([OpenSSL header version])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <stdio.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#define DATA "conftest.sslincver"
 		]], [[
 		FILE *fd;
 		int rc;
 
 		fd = fopen(DATA,"w");
 		if(fd == NULL)
 			exit(1);
 
 		if ((rc = fprintf(fd, "%08lx (%s)\n",
 		    (unsigned long)OPENSSL_VERSION_NUMBER,
 		     OPENSSL_VERSION_TEXT)) < 0)
 			exit(1);
 
 		exit(0);
 		]])],
 		[
 			ssl_header_ver=`cat conftest.sslincver`
 			AC_MSG_RESULT([$ssl_header_ver])
 		],
 		[
-			AC_MSG_RESULT([not found])
-			AC_MSG_ERROR([OpenSSL version header not found.])
+			AC_MSG_RESULT([failed])
+			AC_MSG_ERROR([OpenSSL version test program failed.])
 		],
 		[
 			AC_MSG_WARN([cross compiling: not checking])
 		]
 	)
 
 	# Determining OpenSSL library version is version dependent.
 	AC_CHECK_FUNCS([OpenSSL_version OpenSSL_version_num])
 
 	# Determine OpenSSL library version
 	AC_MSG_CHECKING([OpenSSL library version])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdio.h>
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#include <openssl/crypto.h>
 	#define DATA "conftest.ssllibver"
 		]], [[
 		FILE *f;
 		/* We need these legacy bits to warn for old libcrypto */
 		#ifndef OPENSSL_VERSION
 		# define OPENSSL_VERSION SSLEAY_VERSION
 		#endif
 		#ifndef HAVE_OPENSSL_VERSION
 		# define OpenSSL_version       SSLeay_version
 		#endif
 		#ifndef HAVE_OPENSSL_VERSION_NUM
 		# define OpenSSL_version_num   SSLeay
 		#endif
 		if ((f = fopen(DATA, "w")) == NULL)
 			exit(1);
 		if (fprintf(f, "%08lx (%s)",
 		    (unsigned long)OpenSSL_version_num(),
 		    OpenSSL_version(OPENSSL_VERSION)) < 0)
 			exit(1);
 #ifdef LIBRESSL_VERSION_NUMBER
 		if (fprintf(f, " libressl-%08lx", LIBRESSL_VERSION_NUMBER) < 0)
 			exit(1);
 #endif
 		if (fputc('\n', f) == EOF || fclose(f) == EOF)
 			exit(1);
 		exit(0);
 		]])],
 		[
 			sslver=`cat conftest.ssllibver`
 			ssl_showver=`echo "$sslver" | sed 's/ libressl-.*//'`
 			# Check version is supported.
 			case "$sslver" in
 			100*|10100*) # 1.0.x, 1.1.0x
 				AC_MSG_ERROR([OpenSSL >= 1.1.1 required (have "$ssl_showver")])
 				;;
 			101*)   ;; # 1.1.x
 			200*)   # LibreSSL
 				lver=`echo "$sslver" | sed 's/.*libressl-//'`
 				case "$lver" in
 				2*|300*) # 2.x, 3.0.0
 					AC_MSG_ERROR([LibreSSL >= 3.1.0 required (have "$ssl_showver")])
 					;;
 				*) ;;	# Assume all other versions are good.
 				esac
 				;;
 			300*)
 				# OpenSSL 3; we use the 1.1x API
 				CPPFLAGS="$CPPFLAGS -DOPENSSL_API_COMPAT=0x10100000L"
 				;;
 			301*|302*|303*)
 				# OpenSSL development branch; request 1.1x API
 				CPPFLAGS="$CPPFLAGS -DOPENSSL_API_COMPAT=0x10100000L"
 				;;
 		        *)
 				AC_MSG_ERROR([Unknown/unsupported OpenSSL version ("$ssl_showver")])
 		                ;;
 			esac
 			AC_MSG_RESULT([$ssl_showver])
 		],
 		[
 			AC_MSG_RESULT([not found])
 			AC_MSG_ERROR([OpenSSL library not found.])
 		],
 		[
 			AC_MSG_WARN([cross compiling: not checking])
 		]
 	)
 
 	case "$host" in
 	x86_64-*)
 		case "$sslver" in
 		3000004*)
 			AC_MSG_ERROR([OpenSSL 3.0.4 has a potential RCE in its RSA implementation (CVE-2022-2274)])
 			;;
 		esac
 	esac
 
 	# Sanity check OpenSSL headers
 	AC_MSG_CHECKING([whether OpenSSL's headers match the library])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/opensslv.h>
 	#include <openssl/crypto.h>
 		]], [[
 		exit(OpenSSL_version_num() == OPENSSL_VERSION_NUMBER ? 0 : 1);
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 			if test "x$openssl_check_nonfatal" = "x"; then
 				AC_MSG_ERROR([Your OpenSSL headers do not match your
 	library. Check config.log for details.
 	If you are sure your installation is consistent, you can disable the check
 	by running "./configure --without-openssl-header-check".
 	Also see contrib/findssl.sh for help identifying header/library mismatches.
 	])
 			else
 				AC_MSG_WARN([Your OpenSSL headers do not match your
 	library. Check config.log for details.
 	Also see contrib/findssl.sh for help identifying header/library mismatches.])
 			fi
 		],
 		[
 			AC_MSG_WARN([cross compiling: not checking])
 		]
 	)
 
 	AC_MSG_CHECKING([if programs using OpenSSL functions will link])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[ #include <openssl/err.h> ]],
 		[[ ERR_load_crypto_strings(); ]])],
 		[
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 			LIBS="$LIBS -ldl"
 			AC_MSG_CHECKING([if programs using OpenSSL need -ldl])
 			AC_LINK_IFELSE(
 				[AC_LANG_PROGRAM([[ #include <openssl/err.h> ]],
 				[[ ERR_load_crypto_strings(); ]])],
 				[
 					AC_MSG_RESULT([yes])
 					CHANNELLIBS="$CHANNELLIBS -ldl"
 				],
 				[
 					AC_MSG_RESULT([no])
 				]
 			)
 		]
 	)
 
 	AC_CHECK_FUNCS([ \
 		BN_is_prime_ex \
 		DES_crypt \
 		DSA_generate_parameters_ex \
 		EVP_DigestFinal_ex \
 		EVP_DigestInit_ex \
 		EVP_MD_CTX_cleanup \
 		EVP_MD_CTX_copy_ex \
 		EVP_MD_CTX_init \
 		HMAC_CTX_init \
 		RSA_generate_key_ex \
 		RSA_get_default_method \
 	])
 
 	# OpenSSL_add_all_algorithms may be a macro.
 	AC_CHECK_FUNC(OpenSSL_add_all_algorithms,
 	    AC_DEFINE(HAVE_OPENSSL_ADD_ALL_ALGORITHMS, 1, [as a function]),
 	    AC_CHECK_DECL(OpenSSL_add_all_algorithms,
 		AC_DEFINE(HAVE_OPENSSL_ADD_ALL_ALGORITHMS, 1, [as a macro]), ,
 		[[#include <openssl/evp.h>]]
 	    )
 	)
 
 	# LibreSSL/OpenSSL API differences
 	AC_CHECK_FUNCS([ \
 		EVP_CIPHER_CTX_iv \
 		EVP_CIPHER_CTX_iv_noconst \
 		EVP_CIPHER_CTX_get_iv \
 		EVP_CIPHER_CTX_get_updated_iv \
 		EVP_CIPHER_CTX_set_iv \
 	])
 
 	if test "x$openssl_engine" = "xyes" ; then
 		AC_MSG_CHECKING([for OpenSSL ENGINE support])
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 	#include <openssl/engine.h>
 			]], [[
 				ENGINE_load_builtin_engines();
 				ENGINE_register_all_complete();
 			]])],
 			[ AC_MSG_RESULT([yes])
 			  AC_DEFINE([USE_OPENSSL_ENGINE], [1],
 			     [Enable OpenSSL engine support])
 			], [ AC_MSG_ERROR([OpenSSL ENGINE support not found])
 		])
 	fi
 
 	# Check for OpenSSL without EVP_aes_{192,256}_cbc
-	AC_MSG_CHECKING([whether OpenSSL has crippled AES support])
+	AC_MSG_CHECKING([whether OpenSSL lacks support for AES 192/256])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/evp.h>
 		]], [[
 		exit(EVP_aes_192_cbc() == NULL || EVP_aes_256_cbc() == NULL);
 		]])],
 		[
 			AC_MSG_RESULT([no])
 		],
 		[
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([OPENSSL_LOBOTOMISED_AES], [1],
 			    [libcrypto is missing AES 192 and 256 bit functions])
 		]
 	)
 
 	AC_MSG_CHECKING([if EVP_DigestUpdate returns an int])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/evp.h>
 		]], [[
 		if(EVP_DigestUpdate(NULL, NULL,0))
 			exit(0);
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 			AC_DEFINE([OPENSSL_EVP_DIGESTUPDATE_VOID], [1],
 			    [Define if EVP_DigestUpdate returns void])
 		]
 	)
 
 	# Check for various EVP support in OpenSSL
 	AC_CHECK_FUNCS([EVP_sha256 EVP_sha384 EVP_sha512 EVP_chacha20])
 
 	# Check complete ECC support in OpenSSL
 	AC_MSG_CHECKING([whether OpenSSL has NID_X9_62_prime256v1])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 		]], [[
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
 		const EVP_MD *m = EVP_sha256(); /* We need this too */
 		]])],
 		[ AC_MSG_RESULT([yes])
 		  enable_nistp256=1 ],
 		[ AC_MSG_RESULT([no]) ]
 	)
 
 	AC_MSG_CHECKING([whether OpenSSL has NID_secp384r1])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 		]], [[
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp384r1);
 		const EVP_MD *m = EVP_sha384(); /* We need this too */
 		]])],
 		[ AC_MSG_RESULT([yes])
 		  enable_nistp384=1 ],
 		[ AC_MSG_RESULT([no]) ]
 	)
 
 	AC_MSG_CHECKING([whether OpenSSL has NID_secp521r1])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 		]], [[
 		EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
 		const EVP_MD *m = EVP_sha512(); /* We need this too */
 		]])],
 		[ AC_MSG_RESULT([yes])
 		  AC_MSG_CHECKING([if OpenSSL's NID_secp521r1 is functional])
 		  AC_RUN_IFELSE(
 			[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <openssl/ec.h>
 	#include <openssl/ecdh.h>
 	#include <openssl/ecdsa.h>
 	#include <openssl/evp.h>
 	#include <openssl/objects.h>
 	#include <openssl/opensslv.h>
 			]],[[
 			EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
 			const EVP_MD *m = EVP_sha512(); /* We need this too */
 			exit(e == NULL || m == NULL);
 			]])],
 			[ AC_MSG_RESULT([yes])
 			  enable_nistp521=1 ],
 			[ AC_MSG_RESULT([no]) ],
 			[ AC_MSG_WARN([cross-compiling: assuming yes])
 			  enable_nistp521=1 ]
 		  )],
 		AC_MSG_RESULT([no])
 	)
 
 	if test x$enable_nistp256 = x1 || test x$enable_nistp384 = x1 || \
 	    test x$enable_nistp521 = x1; then
 		AC_DEFINE(OPENSSL_HAS_ECC, [1], [OpenSSL has ECC])
 		AC_CHECK_FUNCS([EC_KEY_METHOD_new])
 		openssl_ecc=yes
 	else
 		openssl_ecc=no
 	fi
 	if test x$enable_nistp256 = x1; then
 		AC_DEFINE([OPENSSL_HAS_NISTP256], [1],
 		    [libcrypto has NID_X9_62_prime256v1])
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdsa-sha2-nistp256 \
 			ecdh-sha2-nistp256 \
 			ecdsa-sha2-nistp256-cert-v01@openssh.com"
 	fi
 	if test x$enable_nistp384 = x1; then
 		AC_DEFINE([OPENSSL_HAS_NISTP384], [1], [libcrypto has NID_secp384r1])
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdsa-sha2-nistp384 \
 			ecdh-sha2-nistp384 \
 			ecdsa-sha2-nistp384-cert-v01@openssh.com"
 	fi
 	if test x$enable_nistp521 = x1; then
 		AC_DEFINE([OPENSSL_HAS_NISTP521], [1], [libcrypto has NID_secp521r1])
 	else
 		unsupported_algorithms="$unsupported_algorithms \
 			ecdh-sha2-nistp521 \
 			ecdsa-sha2-nistp521 \
 			ecdsa-sha2-nistp521-cert-v01@openssh.com"
 	fi
 
 	# Check libcrypto ED25519 support
 	AC_CHECK_FUNCS([EVP_PKEY_get_raw_public_key])
 	AC_CHECK_FUNCS([EVP_PKEY_get_raw_private_key])
 	AC_MSG_CHECKING([whether OpenSSL has ED25519 support])
 	AC_LINK_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <string.h>
 	#include <openssl/evp.h>
 		]], [[
 		unsigned char buf[64];
 		memset(buf, 0, sizeof(buf));
 		exit(EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519,
 		    buf, sizeof(buf)) == NULL);
 		]])],
 		[
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([OPENSSL_HAS_ED25519], [1],
 			    [libcrypto has ed25519 support])
 		],
 		[
 			AC_MSG_RESULT([no])
 		]
 	)
 fi
 
 # PKCS11/U2F depend on OpenSSL and dlopen().
 enable_pkcs11=yes
 enable_sk=yes
 if test "x$openssl" != "xyes" ; then
 	enable_pkcs11="disabled; missing libcrypto"
 fi
 if test "x$ac_cv_func_dlopen" != "xyes" ; then
 	enable_pkcs11="disabled; missing dlopen(3)"
 	enable_sk="disabled; missing dlopen(3)"
 fi
 if test "x$ac_cv_have_decl_RTLD_NOW" != "xyes" ; then
 	enable_pkcs11="disabled; missing RTLD_NOW"
 	enable_sk="disabled; missing RTLD_NOW"
 fi
 if test ! -z "$disable_pkcs11" ; then
 	enable_pkcs11="disabled by user"
 fi
 if test ! -z "$disable_sk" ; then
 	enable_sk="disabled by user"
 fi
 
 AC_MSG_CHECKING([whether to enable PKCS11])
 if test "x$enable_pkcs11" = "xyes" ; then
 	AC_DEFINE([ENABLE_PKCS11], [], [Enable for PKCS#11 support])
 fi
 AC_MSG_RESULT([$enable_pkcs11])
 
 AC_MSG_CHECKING([whether to enable U2F])
 if test "x$enable_sk" = "xyes" ; then
 	AC_DEFINE([ENABLE_SK], [], [Enable for U2F/FIDO support])
 	AC_SUBST(SK_DUMMY_LIBRARY, [regress/misc/sk-dummy/sk-dummy.so])
 else
 	# Do not try to build sk-dummy library.
 	AC_SUBST(SK_DUMMY_LIBRARY, [""])
 fi
 AC_MSG_RESULT([$enable_sk])
 
 # Now check for built-in security key support.
 if test "x$enable_sk" = "xyes" -a "x$enable_sk_internal" != "xno" ; then
 	use_pkgconfig_for_libfido2=
 	if test "x$PKGCONFIG" != "xno"; then
 		AC_MSG_CHECKING([if $PKGCONFIG knows about libfido2])
 		if "$PKGCONFIG" libfido2; then
 			AC_MSG_RESULT([yes])
 			use_pkgconfig_for_libfido2=yes
 		else
 			AC_MSG_RESULT([no])
 		fi
 	fi
 	if test "x$use_pkgconfig_for_libfido2" = "xyes"; then
 		LIBFIDO2=`$PKGCONFIG --libs libfido2`
 		CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libfido2`"
 	else
 		LIBFIDO2="-lfido2 -lcbor"
 	fi
 	OTHERLIBS=`echo $LIBFIDO2 | sed 's/-lfido2//'`
 	fido2_error=
 	AC_CHECK_LIB([fido2], [fido_init],
 		[ ],
 		[ fido2_error="missing/unusable libfido2" ],
 		[ $OTHERLIBS ]
 	)
 	AC_CHECK_HEADER([fido.h], [],
 		[ fido2_error="missing fido.h from libfido2" ])
 	AC_CHECK_HEADER([fido/credman.h], [],
 		[ fido2_error="missing fido/credman.h from libfido2" ],
 		[ #include <fido.h> ]
 	)
 	AC_MSG_CHECKING([for usable libfido2 installation])
 	if test ! -z "$fido2_error" ; then
 		AC_MSG_RESULT([$fido2_error])
 		if test "x$enable_sk_internal" = "xyes" ; then
 			AC_MSG_ERROR([No usable libfido2 library/headers found])
 		fi
 		LIBFIDO2=""
 	else
 		AC_MSG_RESULT([yes])
 		AC_SUBST([LIBFIDO2])
 		AC_DEFINE([ENABLE_SK_INTERNAL], [],
 		    [Enable for built-in U2F/FIDO support])
 		enable_sk="built-in"
 		saved_LIBS="$LIBS"
 		LIBS="$LIBFIDO2 $LIBS"
 		AC_CHECK_FUNCS([ \
 			fido_assert_set_clientdata \
 			fido_cred_prot \
 			fido_cred_set_prot \
 			fido_cred_set_clientdata \
 			fido_dev_get_touch_begin \
 			fido_dev_get_touch_status \
 			fido_dev_supports_cred_prot \
 			fido_dev_is_winhello \
 		])
 		LIBS="$saved_LIBS"
 	fi
 fi
 
 AC_CHECK_FUNCS([ \
 	arc4random \
 	arc4random_buf \
 	arc4random_stir \
 	arc4random_uniform \
 ])
 ### Configure cryptographic random number support
 
 # Check whether OpenSSL seeds itself
 if test "x$openssl" = "xyes" ; then
 	AC_MSG_CHECKING([whether OpenSSL's PRNG is internally seeded])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 	#include <stdlib.h>
 	#include <string.h>
 	#include <openssl/rand.h>
 		]], [[
 		exit(RAND_status() == 1 ? 0 : 1);
 		]])],
 		[
 			OPENSSL_SEEDS_ITSELF=yes
 			AC_MSG_RESULT([yes])
 		],
 		[
 			AC_MSG_RESULT([no])
 		],
 		[
 			AC_MSG_WARN([cross compiling: assuming yes])
 			# This is safe, since we will fatal() at runtime if
 			# OpenSSL is not seeded correctly.
 			OPENSSL_SEEDS_ITSELF=yes
 		]
 	)
 fi
 
 # PRNGD TCP socket
 AC_ARG_WITH([prngd-port],
 	[  --with-prngd-port=PORT  read entropy from PRNGD/EGD TCP localhost:PORT],
 	[
 		case "$withval" in
 		no)
 			withval=""
 			;;
 		[[0-9]]*)
 			;;
 		*)
 			AC_MSG_ERROR([You must specify a numeric port number for --with-prngd-port])
 			;;
 		esac
 		if test ! -z "$withval" ; then
 			PRNGD_PORT="$withval"
 			AC_DEFINE_UNQUOTED([PRNGD_PORT], [$PRNGD_PORT],
 				[Port number of PRNGD/EGD random number socket])
 		fi
 	]
 )
 
 # PRNGD Unix domain socket
 AC_ARG_WITH([prngd-socket],
 	[  --with-prngd-socket=FILE read entropy from PRNGD/EGD socket FILE (default=/var/run/egd-pool)],
 	[
 		case "$withval" in
 		yes)
 			withval="/var/run/egd-pool"
 			;;
 		no)
 			withval=""
 			;;
 		/*)
 			;;
 		*)
 			AC_MSG_ERROR([You must specify an absolute path to the entropy socket])
 			;;
 		esac
 
 		if test ! -z "$withval" ; then
 			if test ! -z "$PRNGD_PORT" ; then
 				AC_MSG_ERROR([You may not specify both a PRNGD/EGD port and socket])
 			fi
 			if test ! -r "$withval" ; then
 				AC_MSG_WARN([Entropy socket is not readable])
 			fi
 			PRNGD_SOCKET="$withval"
 			AC_DEFINE_UNQUOTED([PRNGD_SOCKET], ["$PRNGD_SOCKET"],
 				[Location of PRNGD/EGD random number socket])
 		fi
 	],
 	[
 		# Check for existing socket only if we don't have a random device already
 		if test "x$OPENSSL_SEEDS_ITSELF" != "xyes" ; then
 			AC_MSG_CHECKING([for PRNGD/EGD socket])
 			# Insert other locations here
 			for sock in /var/run/egd-pool /dev/egd-pool /etc/entropy; do
 				if test -r $sock && $TEST_MINUS_S_SH -c "test -S $sock -o -p $sock" ; then
 					PRNGD_SOCKET="$sock"
 					AC_DEFINE_UNQUOTED([PRNGD_SOCKET], ["$PRNGD_SOCKET"])
 					break;
 				fi
 			done
 			if test ! -z "$PRNGD_SOCKET" ; then
 				AC_MSG_RESULT([$PRNGD_SOCKET])
 			else
 				AC_MSG_RESULT([not found])
 			fi
 		fi
 	]
 )
 
 # Which randomness source do we use?
 if test ! -z "$PRNGD_PORT" ; then
 	RAND_MSG="PRNGd port $PRNGD_PORT"
 elif test ! -z "$PRNGD_SOCKET" ; then
 	RAND_MSG="PRNGd socket $PRNGD_SOCKET"
 elif test ! -z "$OPENSSL_SEEDS_ITSELF" ; then
 	AC_DEFINE([OPENSSL_PRNG_ONLY], [1],
 		[Define if you want the OpenSSL internally seeded PRNG only])
 	RAND_MSG="OpenSSL internal ONLY"
 elif test "x$openssl" = "xno" ; then
 	AC_MSG_WARN([OpenSSH will use /dev/urandom as a source of random numbers. It will fail if this device is not supported or accessible])
 else
 	AC_MSG_ERROR([OpenSSH has no source of random numbers. Please configure OpenSSL with an entropy source or re-run configure using one of the --with-prngd-port or --with-prngd-socket options])
 fi
 LIBS="$nocrypto_saved_LIBS"
 
 saved_LIBS="$LIBS"
 AC_CHECK_LIB([iaf], [ia_openinfo], [
 	LIBS="$LIBS -liaf"
 	AC_CHECK_FUNCS([set_id], [SSHDLIBS="$SSHDLIBS -liaf"
 				AC_DEFINE([HAVE_LIBIAF], [1],
 			[Define if system has libiaf that supports set_id])
 				])
 ])
 LIBS="$saved_LIBS"
 
 # Check for crypt() in libcrypt.  If we have it, we only need it for sshd.
 saved_LIBS="$LIBS"
 AC_CHECK_LIB([crypt], [crypt], [
 	LIBS="-lcrypt $LIBS"
 	SSHDLIBS="-lcrypt $SSHDLIBS"
 ])
 AC_CHECK_FUNCS([crypt])
 LIBS="$saved_LIBS"
 
 # Check for PAM libs
 PAM_MSG="no"
 AC_ARG_WITH([pam],
 	[  --with-pam              Enable PAM support ],
 	[
 		if test "x$withval" != "xno" ; then
 			if test "x$ac_cv_header_security_pam_appl_h" != "xyes" && \
 			   test "x$ac_cv_header_pam_pam_appl_h" != "xyes" ; then
 				AC_MSG_ERROR([PAM headers not found])
 			fi
 
 			saved_LIBS="$LIBS"
 			AC_CHECK_LIB([dl], [dlopen], , )
 			AC_CHECK_LIB([pam], [pam_set_item], , [AC_MSG_ERROR([*** libpam missing])])
 			AC_CHECK_FUNCS([pam_getenvlist])
 			AC_CHECK_FUNCS([pam_putenv])
 			LIBS="$saved_LIBS"
 
 			PAM_MSG="yes"
 
 			SSHDLIBS="$SSHDLIBS -lpam"
 			AC_DEFINE([USE_PAM], [1],
 				[Define if you want to enable PAM support])
 
 			if test $ac_cv_lib_dl_dlopen = yes; then
 				case "$LIBS" in
 				*-ldl*)
 					# libdl already in LIBS
 					;;
 				*)
 					SSHDLIBS="$SSHDLIBS -ldl"
 					;;
 				esac
 			fi
 		fi
 	]
 )
 
 AC_ARG_WITH([pam-service],
 	[  --with-pam-service=name Specify PAM service name ],
 	[
 		if test "x$withval" != "xno" && \
 		   test "x$withval" != "xyes" ; then
 			AC_DEFINE_UNQUOTED([SSHD_PAM_SERVICE],
 				["$withval"], [sshd PAM service name])
 		fi
 	]
 )
 
 # Check for older PAM
 if test "x$PAM_MSG" = "xyes" ; then
 	# Check PAM strerror arguments (old PAM)
 	AC_MSG_CHECKING([whether pam_strerror takes only one argument])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <stdlib.h>
 #if defined(HAVE_SECURITY_PAM_APPL_H)
 #include <security/pam_appl.h>
 #elif defined (HAVE_PAM_PAM_APPL_H)
 #include <pam/pam_appl.h>
 #endif
 		]], [[
 (void)pam_strerror((pam_handle_t *)NULL, -1);
 		]])], [AC_MSG_RESULT([no])], [
 			AC_DEFINE([HAVE_OLD_PAM], [1],
 				[Define if you have an old version of PAM
 				which takes only one argument to pam_strerror])
 			AC_MSG_RESULT([yes])
 			PAM_MSG="yes (old library)"
 
 	])
 fi
 
 case "$host" in
 *-*-cygwin*)
 	SSH_PRIVSEP_USER=CYGWIN_SSH_PRIVSEP_USER
 	;;
 *)
 	SSH_PRIVSEP_USER=sshd
 	;;
 esac
 AC_ARG_WITH([privsep-user],
 	[  --with-privsep-user=user Specify non-privileged user for privilege separation],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			SSH_PRIVSEP_USER=$withval
 		fi
 	]
 )
 if test "x$SSH_PRIVSEP_USER" = "xCYGWIN_SSH_PRIVSEP_USER" ; then
 	AC_DEFINE_UNQUOTED([SSH_PRIVSEP_USER], [CYGWIN_SSH_PRIVSEP_USER],
 		[Cygwin function to fetch non-privileged user for privilege separation])
 else
 	AC_DEFINE_UNQUOTED([SSH_PRIVSEP_USER], ["$SSH_PRIVSEP_USER"],
 		[non-privileged user for privilege separation])
 fi
 AC_SUBST([SSH_PRIVSEP_USER])
 
 if test "x$have_linux_no_new_privs" = "x1" ; then
 AC_CHECK_DECL([SECCOMP_MODE_FILTER], [have_seccomp_filter=1], , [
 	#include <sys/types.h>
 	#include <linux/seccomp.h>
 ])
 fi
 if test "x$have_seccomp_filter" = "x1" ; then
 AC_MSG_CHECKING([kernel for seccomp_filter support])
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 		#include <errno.h>
 		#include <elf.h>
 		#include <linux/audit.h>
 		#include <linux/seccomp.h>
 		#include <stdlib.h>
 		#include <sys/prctl.h>
 	]],
 	[[ int i = $seccomp_audit_arch;
 	   errno = 0;
 	   prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
 	   exit(errno == EFAULT ? 0 : 1); ]])],
 	[ AC_MSG_RESULT([yes]) ], [
 		AC_MSG_RESULT([no])
 		# Disable seccomp filter as a target
 		have_seccomp_filter=0
 	]
 )
 fi
 
 AC_CHECK_MEMBERS([struct pollfd.fd], [], [], [[
 #include <sys/types.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #ifdef HAVE_SYS_POLL_H
 #include <sys/poll.h>
 #endif
 ]])
 
 AC_CHECK_TYPES([nfds_t], , , [
 #include <sys/types.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #ifdef HAVE_SYS_POLL_H
 #include <sys/poll.h>
 #endif
 ])
 
 # Decide which sandbox style to use
 sandbox_arg=""
 AC_ARG_WITH([sandbox],
 	[  --with-sandbox=style    Specify privilege separation sandbox (no, capsicum, darwin, rlimit, seccomp_filter, systrace, pledge)],
 	[
 		if test "x$withval" = "xyes" ; then
 			sandbox_arg=""
 		else
 			sandbox_arg="$withval"
 		fi
 	]
 )
 
 if test "x$sandbox_arg" != "xno"; then
 # POSIX specifies that poll() "shall fail with EINVAL if the nfds argument
 # is greater than OPEN_MAX".  On some platforms that includes implementions
 # of select in userspace on top of poll() so check both work with rlimit
 # NOFILES so check that both work before enabling the rlimit sandbox.
     AC_MSG_CHECKING([if select and/or poll works with descriptor rlimit])
     AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/resource.h>
 #ifdef HAVE_SYS_SELECT_H
 # include <sys/select.h>
 #endif
 #ifdef HAVE_POLL_H
 # include <poll.h>
 #elif HAVE_SYS_POLL_H
 # include <sys/poll.h>
 #endif
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 	]],[[
 	struct rlimit rl_zero;
 	int fd, r;
 	fd_set fds;
 	struct timeval tv;
 #ifdef HAVE_POLL
 	struct pollfd pfd;
 #endif
 
 	fd = open("/dev/null", O_RDONLY);
 	FD_ZERO(&fds);
 	FD_SET(fd, &fds);
 	rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 	setrlimit(RLIMIT_FSIZE, &rl_zero);
 	setrlimit(RLIMIT_NOFILE, &rl_zero);
 	tv.tv_sec = 1;
 	tv.tv_usec = 0;
 	r = select(fd+1, &fds, NULL, NULL, &tv);
 	if (r == -1)
 		exit(1);
 #ifdef HAVE_POLL
 	pfd.fd = fd;
 	pfd.events = POLLIN;
 	r = poll(&pfd, 1, 1);
 	if (r == -1)
 		exit(2);
 #endif
 	exit(0);
 	]])],
 	[AC_MSG_RESULT([yes])
 	 select_works_with_rlimit=yes],
 	[AC_MSG_RESULT([no])
 	 select_works_with_rlimit=no],
 	[AC_MSG_WARN([cross compiling: assuming no])
 	 select_works_with_rlimit=no]
     )
 
     AC_MSG_CHECKING([if setrlimit(RLIMIT_NOFILE,{0,0}) works])
     AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/resource.h>
 #include <errno.h>
 #include <stdlib.h>
 	]],[[
 	struct rlimit rl_zero;
 	int r;
 
 	rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 	r = setrlimit(RLIMIT_NOFILE, &rl_zero);
 	exit (r == -1 ? 1 : 0);
 	]])],
 	[AC_MSG_RESULT([yes])
 	 rlimit_nofile_zero_works=yes],
 	[AC_MSG_RESULT([no])
 	 rlimit_nofile_zero_works=no],
 	[AC_MSG_WARN([cross compiling: assuming yes])
 	 rlimit_nofile_zero_works=yes]
     )
 
     AC_MSG_CHECKING([if setrlimit RLIMIT_FSIZE works])
     AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/resource.h>
 #include <stdlib.h>
 	]],[[
 		struct rlimit rl_zero;
 
 		rl_zero.rlim_cur = rl_zero.rlim_max = 0;
 		exit(setrlimit(RLIMIT_FSIZE, &rl_zero) != 0);
 	]])],
 	[AC_MSG_RESULT([yes])],
 	[AC_MSG_RESULT([no])
 	 AC_DEFINE(SANDBOX_SKIP_RLIMIT_FSIZE, 1,
 	    [setrlimit RLIMIT_FSIZE works])],
 	[AC_MSG_WARN([cross compiling: assuming yes])]
     )
 fi
 
 if test "x$sandbox_arg" = "xpledge" || \
    ( test -z "$sandbox_arg" && test "x$ac_cv_func_pledge" = "xyes" ) ; then
 	test "x$ac_cv_func_pledge" != "xyes" && \
 		AC_MSG_ERROR([pledge sandbox requires pledge(2) support])
 	SANDBOX_STYLE="pledge"
 	AC_DEFINE([SANDBOX_PLEDGE], [1], [Sandbox using pledge(2)])
 elif test "x$sandbox_arg" = "xsystrace" || \
    ( test -z "$sandbox_arg" && test "x$have_systr_policy_kill" = "x1" ) ; then
 	test "x$have_systr_policy_kill" != "x1" && \
 		AC_MSG_ERROR([systrace sandbox requires systrace headers and SYSTR_POLICY_KILL support])
 	SANDBOX_STYLE="systrace"
 	AC_DEFINE([SANDBOX_SYSTRACE], [1], [Sandbox using systrace(4)])
 elif test "x$sandbox_arg" = "xdarwin" || \
      ( test -z "$sandbox_arg" && test "x$ac_cv_func_sandbox_init" = "xyes" && \
        test "x$ac_cv_header_sandbox_h" = "xyes") ; then
 	test "x$ac_cv_func_sandbox_init" != "xyes" -o \
 	     "x$ac_cv_header_sandbox_h" != "xyes" && \
 		AC_MSG_ERROR([Darwin seatbelt sandbox requires sandbox.h and sandbox_init function])
 	SANDBOX_STYLE="darwin"
 	AC_DEFINE([SANDBOX_DARWIN], [1], [Sandbox using Darwin sandbox_init(3)])
 elif test "x$sandbox_arg" = "xseccomp_filter" || \
      ( test -z "$sandbox_arg" && \
        test "x$have_seccomp_filter" = "x1" && \
        test "x$ac_cv_header_elf_h" = "xyes" && \
        test "x$ac_cv_header_linux_audit_h" = "xyes" && \
        test "x$ac_cv_header_linux_filter_h" = "xyes" && \
        test "x$seccomp_audit_arch" != "x" && \
        test "x$have_linux_no_new_privs" = "x1" && \
        test "x$ac_cv_func_prctl" = "xyes" ) ; then
 	test "x$seccomp_audit_arch" = "x" && \
 		AC_MSG_ERROR([seccomp_filter sandbox not supported on $host])
 	test "x$have_linux_no_new_privs" != "x1" && \
 		AC_MSG_ERROR([seccomp_filter sandbox requires PR_SET_NO_NEW_PRIVS])
 	test "x$have_seccomp_filter" != "x1" && \
 		AC_MSG_ERROR([seccomp_filter sandbox requires seccomp headers])
 	test "x$ac_cv_func_prctl" != "xyes" && \
 		AC_MSG_ERROR([seccomp_filter sandbox requires prctl function])
 	SANDBOX_STYLE="seccomp_filter"
 	AC_DEFINE([SANDBOX_SECCOMP_FILTER], [1], [Sandbox using seccomp filter])
 elif test "x$sandbox_arg" = "xcapsicum" || \
      ( test -z "$sandbox_arg" && \
        test "x$disable_capsicum" != "xyes" && \
        test "x$ac_cv_header_sys_capsicum_h" = "xyes" && \
        test "x$ac_cv_func_cap_rights_limit" = "xyes") ; then
        test "x$ac_cv_header_sys_capsicum_h" != "xyes" && \
 		AC_MSG_ERROR([capsicum sandbox requires sys/capsicum.h header])
        test "x$ac_cv_func_cap_rights_limit" != "xyes" && \
 		AC_MSG_ERROR([capsicum sandbox requires cap_rights_limit function])
        SANDBOX_STYLE="capsicum"
        AC_DEFINE([SANDBOX_CAPSICUM], [1], [Sandbox using capsicum])
 elif test "x$sandbox_arg" = "xrlimit" || \
      ( test -z "$sandbox_arg" && test "x$ac_cv_func_setrlimit" = "xyes" && \
        test "x$select_works_with_rlimit" = "xyes" && \
        test "x$rlimit_nofile_zero_works" = "xyes" ) ; then
 	test "x$ac_cv_func_setrlimit" != "xyes" && \
 		AC_MSG_ERROR([rlimit sandbox requires setrlimit function])
 	test "x$select_works_with_rlimit" != "xyes" && \
 		AC_MSG_ERROR([rlimit sandbox requires select to work with rlimit])
 	SANDBOX_STYLE="rlimit"
 	AC_DEFINE([SANDBOX_RLIMIT], [1], [Sandbox using setrlimit(2)])
 elif test "x$sandbox_arg" = "xsolaris" || \
    ( test -z "$sandbox_arg" && test "x$SOLARIS_PRIVS" = "xyes" ) ; then
 	SANDBOX_STYLE="solaris"
 	AC_DEFINE([SANDBOX_SOLARIS], [1], [Sandbox using Solaris/Illumos privileges])
 elif test -z "$sandbox_arg" || test "x$sandbox_arg" = "xno" || \
      test "x$sandbox_arg" = "xnone" || test "x$sandbox_arg" = "xnull" ; then
 	SANDBOX_STYLE="none"
 	AC_DEFINE([SANDBOX_NULL], [1], [no privsep sandboxing])
 else
 	AC_MSG_ERROR([unsupported --with-sandbox])
 fi
 
 # Cheap hack to ensure NEWS-OS libraries are arranged right.
 if test ! -z "$SONY" ; then
   LIBS="$LIBS -liberty";
 fi
 
 # Check for long long datatypes
 AC_CHECK_TYPES([long long, unsigned long long, long double])
 
 # Check datatype sizes
 AC_CHECK_SIZEOF([short int])
 AC_CHECK_SIZEOF([int])
 AC_CHECK_SIZEOF([long int])
 AC_CHECK_SIZEOF([long long int])
 AC_CHECK_SIZEOF([time_t], [], [[
     #include <sys/types.h>
     #ifdef HAVE_SYS_TIME_H
     # include <sys/time.h>
     #endif
     #ifdef HAVE_TIME_H
     # include <time.h>
     #endif
 	]]
 )
 
 # Sanity check long long for some platforms (AIX)
 if test "x$ac_cv_sizeof_long_long_int" = "x4" ; then
 	ac_cv_sizeof_long_long_int=0
 fi
 
 # compute LLONG_MIN and LLONG_MAX if we don't know them.
 if test -z "$have_llong_max" && test -z "$have_long_long_max"; then
 	AC_MSG_CHECKING([for max value of long long])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 /* Why is this so damn hard? */
 #ifdef __GNUC__
 # undef __GNUC__
 #endif
 #define __USE_ISOC99
 #include <limits.h>
 #define DATA "conftest.llminmax"
 #define my_abs(a) ((a) < 0 ? ((a) * -1) : (a))
 
 /*
  * printf in libc on some platforms (eg old Tru64) does not understand %lld so
  * we do this the hard way.
  */
 static int
 fprint_ll(FILE *f, long long n)
 {
 	unsigned int i;
 	int l[sizeof(long long) * 8];
 
 	if (n < 0)
 		if (fprintf(f, "-") < 0)
 			return -1;
 	for (i = 0; n != 0; i++) {
 		l[i] = my_abs(n % 10);
 		n /= 10;
 	}
 	do {
 		if (fprintf(f, "%d", l[--i]) < 0)
 			return -1;
 	} while (i != 0);
 	if (fprintf(f, " ") < 0)
 		return -1;
 	return 0;
 }
 		]], [[
 	FILE *f;
 	long long i, llmin, llmax = 0;
 
 	if((f = fopen(DATA,"w")) == NULL)
 		exit(1);
 
 #if defined(LLONG_MIN) && defined(LLONG_MAX)
 	fprintf(stderr, "Using system header for LLONG_MIN and LLONG_MAX\n");
 	llmin = LLONG_MIN;
 	llmax = LLONG_MAX;
 #else
 	fprintf(stderr, "Calculating  LLONG_MIN and LLONG_MAX\n");
 	/* This will work on one's complement and two's complement */
 	for (i = 1; i > llmax; i <<= 1, i++)
 		llmax = i;
 	llmin = llmax + 1LL;	/* wrap */
 #endif
 
 	/* Sanity check */
 	if (llmin + 1 < llmin || llmin - 1 < llmin || llmax + 1 > llmax
 	    || llmax - 1 > llmax || llmin == llmax || llmin == 0
 	    || llmax == 0 || llmax < LONG_MAX || llmin > LONG_MIN) {
 		fprintf(f, "unknown unknown\n");
 		exit(2);
 	}
 
 	if (fprint_ll(f, llmin) < 0)
 		exit(3);
 	if (fprint_ll(f, llmax) < 0)
 		exit(4);
 	if (fclose(f) < 0)
 		exit(5);
 	exit(0);
 		]])],
 		[
 			llong_min=`$AWK '{print $1}' conftest.llminmax`
 			llong_max=`$AWK '{print $2}' conftest.llminmax`
 
 			AC_MSG_RESULT([$llong_max])
 			AC_DEFINE_UNQUOTED([LLONG_MAX], [${llong_max}LL],
 			    [max value of long long calculated by configure])
 			AC_MSG_CHECKING([for min value of long long])
 			AC_MSG_RESULT([$llong_min])
 			AC_DEFINE_UNQUOTED([LLONG_MIN], [${llong_min}LL],
 			    [min value of long long calculated by configure])
 		],
 		[
 			AC_MSG_RESULT([not found])
 		],
 		[
 			AC_MSG_WARN([cross compiling: not checking])
 		]
 	)
 fi
 
 AC_CHECK_DECLS([UINT32_MAX], , , [[
 #ifdef HAVE_SYS_LIMITS_H
 # include <sys/limits.h>
 #endif
 #ifdef HAVE_LIMITS_H
 # include <limits.h>
 #endif
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 ]])
 
 # More checks for data types
 AC_CACHE_CHECK([for u_int type], ac_cv_have_u_int, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ u_int a; a = 1;]])],
 	[ ac_cv_have_u_int="yes" ], [ ac_cv_have_u_int="no"
 	])
 ])
 if test "x$ac_cv_have_u_int" = "xyes" ; then
 	AC_DEFINE([HAVE_U_INT], [1], [define if you have u_int data type])
 	have_u_int=1
 fi
 
 AC_CACHE_CHECK([for intXX_t types], ac_cv_have_intxx_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ int8_t a; int16_t b; int32_t c; a = b = c = 1;]])],
 	[ ac_cv_have_intxx_t="yes" ], [ ac_cv_have_intxx_t="no"
 	])
 ])
 if test "x$ac_cv_have_intxx_t" = "xyes" ; then
 	AC_DEFINE([HAVE_INTXX_T], [1], [define if you have intxx_t data type])
 	have_intxx_t=1
 fi
 
 if (test -z "$have_intxx_t" && \
 	   test "x$ac_cv_header_stdint_h" = "xyes")
 then
     AC_MSG_CHECKING([for intXX_t types in stdint.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdint.h> ]],
 	[[ int8_t a; int16_t b; int32_t c; a = b = c = 1;]])],
 		[
 			AC_DEFINE([HAVE_INTXX_T])
 			AC_MSG_RESULT([yes])
 		], [ AC_MSG_RESULT([no])
 	])
 fi
 
 AC_CACHE_CHECK([for int64_t type], ac_cv_have_int64_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <sys/socket.h>
 #ifdef HAVE_SYS_BITYPES_H
 # include <sys/bitypes.h>
 #endif
 		]], [[
 int64_t a; a = 1;
 		]])],
 	[ ac_cv_have_int64_t="yes" ], [ ac_cv_have_int64_t="no"
 	])
 ])
 if test "x$ac_cv_have_int64_t" = "xyes" ; then
 	AC_DEFINE([HAVE_INT64_T], [1], [define if you have int64_t data type])
 fi
 
 AC_CACHE_CHECK([for u_intXX_t types], ac_cv_have_u_intxx_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;]])],
 	[ ac_cv_have_u_intxx_t="yes" ], [ ac_cv_have_u_intxx_t="no"
 	])
 ])
 if test "x$ac_cv_have_u_intxx_t" = "xyes" ; then
 	AC_DEFINE([HAVE_U_INTXX_T], [1], [define if you have u_intxx_t data type])
 	have_u_intxx_t=1
 fi
 
 if test -z "$have_u_intxx_t" ; then
     AC_MSG_CHECKING([for u_intXX_t types in sys/socket.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/socket.h> ]],
 	[[ u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;]])],
 		[
 			AC_DEFINE([HAVE_U_INTXX_T])
 			AC_MSG_RESULT([yes])
 		], [ AC_MSG_RESULT([no])
 	])
 fi
 
 AC_CACHE_CHECK([for u_int64_t types], ac_cv_have_u_int64_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ u_int64_t a; a = 1;]])],
 	[ ac_cv_have_u_int64_t="yes" ], [ ac_cv_have_u_int64_t="no"
 	])
 ])
 if test "x$ac_cv_have_u_int64_t" = "xyes" ; then
 	AC_DEFINE([HAVE_U_INT64_T], [1], [define if you have u_int64_t data type])
 	have_u_int64_t=1
 fi
 
 if (test -z "$have_u_int64_t" && \
 	   test "x$ac_cv_header_sys_bitypes_h" = "xyes")
 then
     AC_MSG_CHECKING([for u_int64_t type in sys/bitypes.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/bitypes.h> ]],
 	[[ u_int64_t a; a = 1]])],
 		[
 			AC_DEFINE([HAVE_U_INT64_T])
 			AC_MSG_RESULT([yes])
 		], [ AC_MSG_RESULT([no])
 	])
 fi
 
 if test -z "$have_u_intxx_t" ; then
 	AC_CACHE_CHECK([for uintXX_t types], ac_cv_have_uintxx_t, [
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 			]], [[
 	uint8_t a;
 	uint16_t b;
 	uint32_t c;
 	a = b = c = 1;
 			]])],
 		[ ac_cv_have_uintxx_t="yes" ], [ ac_cv_have_uintxx_t="no"
 		])
 	])
 	if test "x$ac_cv_have_uintxx_t" = "xyes" ; then
 		AC_DEFINE([HAVE_UINTXX_T], [1],
 			[define if you have uintxx_t data type])
 	fi
 fi
 
 if (test -z "$have_uintxx_t" && \
 	   test "x$ac_cv_header_stdint_h" = "xyes")
 then
     AC_MSG_CHECKING([for uintXX_t types in stdint.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdint.h> ]],
 	[[ uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;]])],
 		[
 			AC_DEFINE([HAVE_UINTXX_T])
 			AC_MSG_RESULT([yes])
 		], [ AC_MSG_RESULT([no])
 	])
 fi
 
 if (test -z "$have_uintxx_t" && \
 	   test "x$ac_cv_header_inttypes_h" = "xyes")
 then
     AC_MSG_CHECKING([for uintXX_t types in inttypes.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <inttypes.h> ]],
 	[[ uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;]])],
 		[
 			AC_DEFINE([HAVE_UINTXX_T])
 			AC_MSG_RESULT([yes])
 		], [ AC_MSG_RESULT([no])
 	])
 fi
 
 if (test -z "$have_u_intxx_t" || test -z "$have_intxx_t" && \
 	   test "x$ac_cv_header_sys_bitypes_h" = "xyes")
 then
 	AC_MSG_CHECKING([for intXX_t and u_intXX_t types in sys/bitypes.h])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/bitypes.h>
 		]], [[
 			int8_t a; int16_t b; int32_t c;
 			u_int8_t e; u_int16_t f; u_int32_t g;
 			a = b = c = e = f = g = 1;
 		]])],
 		[
 			AC_DEFINE([HAVE_U_INTXX_T])
 			AC_DEFINE([HAVE_INTXX_T])
 			AC_MSG_RESULT([yes])
 		], [AC_MSG_RESULT([no])
 	])
 fi
 
 
 AC_CACHE_CHECK([for u_char], ac_cv_have_u_char, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ u_char foo; foo = 125; ]])],
 	[ ac_cv_have_u_char="yes" ], [ ac_cv_have_u_char="no"
 	])
 ])
 if test "x$ac_cv_have_u_char" = "xyes" ; then
 	AC_DEFINE([HAVE_U_CHAR], [1], [define if you have u_char data type])
 fi
 
 AC_CHECK_TYPES([intmax_t, uintmax_t], , , [
 #include <sys/types.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 ])
 
 TYPE_SOCKLEN_T
 
 AC_CHECK_TYPES([sig_atomic_t, sighandler_t], , , [#include <signal.h>])
 AC_CHECK_TYPES([fsblkcnt_t, fsfilcnt_t], , , [
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 ])
 
 AC_CHECK_MEMBERS([struct statfs.f_files, struct statfs.f_flags], [], [], [[
 #include <sys/param.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_BITYPES_H
 #include <sys/bitypes.h>
 #endif
 #ifdef HAVE_SYS_STATFS_H
 #include <sys/statfs.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 #ifdef HAVE_SYS_VFS_H
 #include <sys/vfs.h>
 #endif
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
 ]])
 
 
 AC_CHECK_TYPES([in_addr_t, in_port_t], , ,
 [#include <sys/types.h>
 #include <netinet/in.h>])
 
 AC_CACHE_CHECK([for size_t], ac_cv_have_size_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ size_t foo; foo = 1235; ]])],
 	[ ac_cv_have_size_t="yes" ], [ ac_cv_have_size_t="no"
 	])
 ])
 if test "x$ac_cv_have_size_t" = "xyes" ; then
 	AC_DEFINE([HAVE_SIZE_T], [1], [define if you have size_t data type])
 fi
 
 AC_CACHE_CHECK([for ssize_t], ac_cv_have_ssize_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ ssize_t foo; foo = 1235; ]])],
 	[ ac_cv_have_ssize_t="yes" ], [ ac_cv_have_ssize_t="no"
 	])
 ])
 if test "x$ac_cv_have_ssize_t" = "xyes" ; then
 	AC_DEFINE([HAVE_SSIZE_T], [1], [define if you have ssize_t data type])
 fi
 
 AC_CACHE_CHECK([for clock_t], ac_cv_have_clock_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <time.h> ]],
 	[[ clock_t foo; foo = 1235; ]])],
 	[ ac_cv_have_clock_t="yes" ], [ ac_cv_have_clock_t="no"
 	])
 ])
 if test "x$ac_cv_have_clock_t" = "xyes" ; then
 	AC_DEFINE([HAVE_CLOCK_T], [1], [define if you have clock_t data type])
 fi
 
 AC_CACHE_CHECK([for sa_family_t], ac_cv_have_sa_family_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 		]], [[ sa_family_t foo; foo = 1235; ]])],
 	[ ac_cv_have_sa_family_t="yes" ],
 	[ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 		]], [[ sa_family_t foo; foo = 1235; ]])],
 		[ ac_cv_have_sa_family_t="yes" ],
 		[ ac_cv_have_sa_family_t="no" ]
 	)
 	])
 ])
 if test "x$ac_cv_have_sa_family_t" = "xyes" ; then
 	AC_DEFINE([HAVE_SA_FAMILY_T], [1],
 		[define if you have sa_family_t data type])
 fi
 
 AC_CACHE_CHECK([for pid_t], ac_cv_have_pid_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ pid_t foo; foo = 1235; ]])],
 	[ ac_cv_have_pid_t="yes" ], [ ac_cv_have_pid_t="no"
 	])
 ])
 if test "x$ac_cv_have_pid_t" = "xyes" ; then
 	AC_DEFINE([HAVE_PID_T], [1], [define if you have pid_t data type])
 fi
 
 AC_CACHE_CHECK([for mode_t], ac_cv_have_mode_t, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
 	[[ mode_t foo; foo = 1235; ]])],
 	[ ac_cv_have_mode_t="yes" ], [ ac_cv_have_mode_t="no"
 	])
 ])
 if test "x$ac_cv_have_mode_t" = "xyes" ; then
 	AC_DEFINE([HAVE_MODE_T], [1], [define if you have mode_t data type])
 fi
 
 
 AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_have_struct_sockaddr_storage, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 		]], [[ struct sockaddr_storage s; ]])],
 	[ ac_cv_have_struct_sockaddr_storage="yes" ],
 	[ ac_cv_have_struct_sockaddr_storage="no"
 	])
 ])
 if test "x$ac_cv_have_struct_sockaddr_storage" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_SOCKADDR_STORAGE], [1],
 		[define if you have struct sockaddr_storage data type])
 fi
 
 AC_CACHE_CHECK([for struct sockaddr_in6], ac_cv_have_struct_sockaddr_in6, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <netinet/in.h>
 		]], [[ struct sockaddr_in6 s; s.sin6_family = 0; ]])],
 	[ ac_cv_have_struct_sockaddr_in6="yes" ],
 	[ ac_cv_have_struct_sockaddr_in6="no"
 	])
 ])
 if test "x$ac_cv_have_struct_sockaddr_in6" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_SOCKADDR_IN6], [1],
 		[define if you have struct sockaddr_in6 data type])
 fi
 
 AC_CACHE_CHECK([for struct in6_addr], ac_cv_have_struct_in6_addr, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <netinet/in.h>
 		]], [[ struct in6_addr s; s.s6_addr[0] = 0; ]])],
 	[ ac_cv_have_struct_in6_addr="yes" ],
 	[ ac_cv_have_struct_in6_addr="no"
 	])
 ])
 if test "x$ac_cv_have_struct_in6_addr" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_IN6_ADDR], [1],
 		[define if you have struct in6_addr data type])
 
 dnl Now check for sin6_scope_id
 	AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id], , ,
 		[
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #include <netinet/in.h>
 		])
 fi
 
 AC_CACHE_CHECK([for struct addrinfo], ac_cv_have_struct_addrinfo, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 		]], [[ struct addrinfo s; s.ai_flags = AI_PASSIVE; ]])],
 	[ ac_cv_have_struct_addrinfo="yes" ],
 	[ ac_cv_have_struct_addrinfo="no"
 	])
 ])
 if test "x$ac_cv_have_struct_addrinfo" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_ADDRINFO], [1],
 		[define if you have struct addrinfo data type])
 fi
 
 AC_CACHE_CHECK([for struct timeval], ac_cv_have_struct_timeval, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/time.h> ]],
 	[[ struct timeval tv; tv.tv_sec = 1;]])],
 	[ ac_cv_have_struct_timeval="yes" ],
 	[ ac_cv_have_struct_timeval="no"
 	])
 ])
 if test "x$ac_cv_have_struct_timeval" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_TIMEVAL], [1], [define if you have struct timeval])
 	have_struct_timeval=1
 fi
 
 AC_CACHE_CHECK([for struct timespec], ac_cv_have_struct_timespec, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
     #ifdef HAVE_SYS_TIME_H
     # include <sys/time.h>
     #endif
     #ifdef HAVE_TIME_H
     # include <time.h>
     #endif
 	]],
 	[[ struct timespec ts; ts.tv_sec = 1;]])],
 	[ ac_cv_have_struct_timespec="yes" ],
 	[ ac_cv_have_struct_timespec="no"
 	])
 ])
 if test "x$ac_cv_have_struct_timespec" = "xyes" ; then
 	AC_DEFINE([HAVE_STRUCT_TIMESPEC], [1], [define if you have struct timespec])
 	have_struct_timespec=1
 fi
 
 # We need int64_t or else certain parts of the compile will fail.
 if test "x$ac_cv_have_int64_t" = "xno" && \
 	test "x$ac_cv_sizeof_long_int" != "x8" && \
 	test "x$ac_cv_sizeof_long_long_int" = "x0" ; then
 	echo "OpenSSH requires int64_t support.  Contact your vendor or install"
 	echo "an alternative compiler (I.E., GCC) before continuing."
 	echo ""
 	exit 1;
 else
 dnl test snprintf (broken on SCO w/gcc)
 	AC_RUN_IFELSE(
 		[AC_LANG_SOURCE([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_SNPRINTF
 int main(void)
 {
 	char buf[50];
 	char expected_out[50];
 	int mazsize = 50 ;
 #if (SIZEOF_LONG_INT == 8)
 	long int num = 0x7fffffffffffffff;
 #else
 	long long num = 0x7fffffffffffffffll;
 #endif
 	strcpy(expected_out, "9223372036854775807");
 	snprintf(buf, mazsize, "%lld", num);
 	if(strcmp(buf, expected_out) != 0)
 		exit(1);
 	exit(0);
 }
 #else
 int main(void) { exit(0); }
 #endif
 		]])], [ true ], [ AC_DEFINE([BROKEN_SNPRINTF]) ],
 		AC_MSG_WARN([cross compiling: Assuming working snprintf()])
 	)
 fi
 
 dnl Checks for structure members
 OSSH_CHECK_HEADER_FOR_FIELD([ut_host], [utmp.h], [HAVE_HOST_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_host], [utmpx.h], [HAVE_HOST_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([syslen], [utmpx.h], [HAVE_SYSLEN_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_pid], [utmp.h], [HAVE_PID_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_type], [utmp.h], [HAVE_TYPE_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_type], [utmpx.h], [HAVE_TYPE_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_tv], [utmp.h], [HAVE_TV_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_id], [utmp.h], [HAVE_ID_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_id], [utmpx.h], [HAVE_ID_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_addr], [utmp.h], [HAVE_ADDR_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_addr], [utmpx.h], [HAVE_ADDR_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_addr_v6], [utmp.h], [HAVE_ADDR_V6_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_addr_v6], [utmpx.h], [HAVE_ADDR_V6_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_exit], [utmp.h], [HAVE_EXIT_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_time], [utmp.h], [HAVE_TIME_IN_UTMP])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_time], [utmpx.h], [HAVE_TIME_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_tv], [utmpx.h], [HAVE_TV_IN_UTMPX])
 OSSH_CHECK_HEADER_FOR_FIELD([ut_ss], [utmpx.h], [HAVE_SS_IN_UTMPX])
 
 AC_CHECK_MEMBERS([struct stat.st_blksize])
 AC_CHECK_MEMBERS([struct stat.st_mtim])
 AC_CHECK_MEMBERS([struct stat.st_mtime])
 AC_CHECK_MEMBERS([struct passwd.pw_gecos, struct passwd.pw_class,
 struct passwd.pw_change, struct passwd.pw_expire],
 [], [], [[
 #include <sys/types.h>
 #include <pwd.h>
 ]])
 
 AC_CHECK_MEMBER([struct __res_state.retrans], [], [AC_DEFINE([__res_state], [state],
 	[Define if we don't have struct __res_state in resolv.h])],
 [[
 #include <stdio.h>
 #if HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>
 ]])
 
 AC_CHECK_MEMBER([struct sockaddr_in.sin_len],
     [AC_DEFINE([SOCK_HAS_LEN], [1], [sockaddr_in has sin_len])],
     [],
     [AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
     ]])]
 )
 
 AC_CACHE_CHECK([for ss_family field in struct sockaddr_storage],
 		ac_cv_have_ss_family_in_struct_ss, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 		]], [[ struct sockaddr_storage s; s.ss_family = 1; ]])],
 	[ ac_cv_have_ss_family_in_struct_ss="yes" ],
 	[ ac_cv_have_ss_family_in_struct_ss="no" ])
 ])
 if test "x$ac_cv_have_ss_family_in_struct_ss" = "xyes" ; then
 	AC_DEFINE([HAVE_SS_FAMILY_IN_SS], [1], [Fields in struct sockaddr_storage])
 fi
 
 AC_CACHE_CHECK([for __ss_family field in struct sockaddr_storage],
 		ac_cv_have___ss_family_in_struct_ss, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 		]], [[ struct sockaddr_storage s; s.__ss_family = 1; ]])],
 	[ ac_cv_have___ss_family_in_struct_ss="yes" ],
 	[ ac_cv_have___ss_family_in_struct_ss="no"
 	])
 ])
 if test "x$ac_cv_have___ss_family_in_struct_ss" = "xyes" ; then
 	AC_DEFINE([HAVE___SS_FAMILY_IN_SS], [1],
 		[Fields in struct sockaddr_storage])
 fi
 
 dnl make sure we're using the real structure members and not defines
 AC_CACHE_CHECK([for msg_accrights field in struct msghdr],
 		ac_cv_have_accrights_in_msghdr, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <stdlib.h>
 		]], [[
 #ifdef msg_accrights
 #error "msg_accrights is a macro"
 exit(1);
 #endif
 struct msghdr m;
 m.msg_accrights = 0;
 exit(0);
 		]])],
 		[ ac_cv_have_accrights_in_msghdr="yes" ],
 		[ ac_cv_have_accrights_in_msghdr="no" ]
 	)
 ])
 if test "x$ac_cv_have_accrights_in_msghdr" = "xyes" ; then
 	AC_DEFINE([HAVE_ACCRIGHTS_IN_MSGHDR], [1],
 		[Define if your system uses access rights style
 		file descriptor passing])
 fi
 
 AC_MSG_CHECKING([if struct statvfs.f_fsid is integral type])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/param.h>
 #include <sys/stat.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 	]], [[ struct statvfs s; s.f_fsid = 0; ]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_RESULT([no])
 
 	AC_MSG_CHECKING([if fsid_t has member val])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/statvfs.h>
 	]], [[ fsid_t t; t.val[0] = 0; ]])],
 	[ AC_MSG_RESULT([yes])
 	  AC_DEFINE([FSID_HAS_VAL], [1], [fsid_t has member val]) ],
 	[ AC_MSG_RESULT([no]) ])
 
 	AC_MSG_CHECKING([if f_fsid has member __val])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/statvfs.h>
 	]], [[ fsid_t t; t.__val[0] = 0; ]])],
 	[ AC_MSG_RESULT([yes])
 	  AC_DEFINE([FSID_HAS___VAL], [1], [fsid_t has member __val]) ],
 	[ AC_MSG_RESULT([no]) ])
 ])
 
 AC_CACHE_CHECK([for msg_control field in struct msghdr],
 		ac_cv_have_control_in_msghdr, [
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <stdlib.h>
 		]], [[
 #ifdef msg_control
 #error "msg_control is a macro"
 exit(1);
 #endif
 struct msghdr m;
 m.msg_control = 0;
 exit(0);
 		]])],
 		[ ac_cv_have_control_in_msghdr="yes" ],
 		[ ac_cv_have_control_in_msghdr="no" ]
 	)
 ])
 if test "x$ac_cv_have_control_in_msghdr" = "xyes" ; then
 	AC_DEFINE([HAVE_CONTROL_IN_MSGHDR], [1],
 		[Define if your system uses ancillary data style
 		file descriptor passing])
 fi
 
 AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
 		[[ extern char *__progname; printf("%s", __progname); ]])],
 	[ ac_cv_libc_defines___progname="yes" ],
 	[ ac_cv_libc_defines___progname="no"
 	])
 ])
 if test "x$ac_cv_libc_defines___progname" = "xyes" ; then
 	AC_DEFINE([HAVE___PROGNAME], [1], [Define if libc defines __progname])
 fi
 
 AC_CACHE_CHECK([whether $CC implements __FUNCTION__], ac_cv_cc_implements___FUNCTION__, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
 		[[ printf("%s", __FUNCTION__); ]])],
 	[ ac_cv_cc_implements___FUNCTION__="yes" ],
 	[ ac_cv_cc_implements___FUNCTION__="no"
 	])
 ])
 if test "x$ac_cv_cc_implements___FUNCTION__" = "xyes" ; then
 	AC_DEFINE([HAVE___FUNCTION__], [1],
 		[Define if compiler implements __FUNCTION__])
 fi
 
 AC_CACHE_CHECK([whether $CC implements __func__], ac_cv_cc_implements___func__, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
 		[[ printf("%s", __func__); ]])],
 	[ ac_cv_cc_implements___func__="yes" ],
 	[ ac_cv_cc_implements___func__="no"
 	])
 ])
 if test "x$ac_cv_cc_implements___func__" = "xyes" ; then
 	AC_DEFINE([HAVE___func__], [1], [Define if compiler implements __func__])
 fi
 
 AC_CACHE_CHECK([whether va_copy exists], ac_cv_have_va_copy, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdarg.h>
 va_list x,y;
 		]], [[ va_copy(x,y); ]])],
 	[ ac_cv_have_va_copy="yes" ],
 	[ ac_cv_have_va_copy="no"
 	])
 ])
 if test "x$ac_cv_have_va_copy" = "xyes" ; then
 	AC_DEFINE([HAVE_VA_COPY], [1], [Define if va_copy exists])
 fi
 
 AC_CACHE_CHECK([whether __va_copy exists], ac_cv_have___va_copy, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdarg.h>
 va_list x,y;
 		]], [[ __va_copy(x,y); ]])],
 	[ ac_cv_have___va_copy="yes" ], [ ac_cv_have___va_copy="no"
 	])
 ])
 if test "x$ac_cv_have___va_copy" = "xyes" ; then
 	AC_DEFINE([HAVE___VA_COPY], [1], [Define if __va_copy exists])
 fi
 
 AC_CACHE_CHECK([whether getopt has optreset support],
 		ac_cv_have_getopt_optreset, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <getopt.h> ]],
 		[[ extern int optreset; optreset = 0; ]])],
 	[ ac_cv_have_getopt_optreset="yes" ],
 	[ ac_cv_have_getopt_optreset="no"
 	])
 ])
 if test "x$ac_cv_have_getopt_optreset" = "xyes" ; then
 	AC_DEFINE([HAVE_GETOPT_OPTRESET], [1],
 		[Define if your getopt(3) defines and uses optreset])
 fi
 
 AC_CACHE_CHECK([if libc defines sys_errlist], ac_cv_libc_defines_sys_errlist, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
 [[ extern const char *const sys_errlist[]; printf("%s", sys_errlist[0]);]])],
 	[ ac_cv_libc_defines_sys_errlist="yes" ],
 	[ ac_cv_libc_defines_sys_errlist="no"
 	])
 ])
 if test "x$ac_cv_libc_defines_sys_errlist" = "xyes" ; then
 	AC_DEFINE([HAVE_SYS_ERRLIST], [1],
 		[Define if your system defines sys_errlist[]])
 fi
 
 
 AC_CACHE_CHECK([if libc defines sys_nerr], ac_cv_libc_defines_sys_nerr, [
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
 [[ extern int sys_nerr; printf("%i", sys_nerr);]])],
 	[ ac_cv_libc_defines_sys_nerr="yes" ],
 	[ ac_cv_libc_defines_sys_nerr="no"
 	])
 ])
 if test "x$ac_cv_libc_defines_sys_nerr" = "xyes" ; then
 	AC_DEFINE([HAVE_SYS_NERR], [1], [Define if your system defines sys_nerr])
 fi
 
 # Check libraries needed by DNS fingerprint support
 AC_SEARCH_LIBS([getrrsetbyname], [resolv],
 	[AC_DEFINE([HAVE_GETRRSETBYNAME], [1],
 		[Define if getrrsetbyname() exists])],
 	[
 		# Needed by our getrrsetbyname()
 		AC_SEARCH_LIBS([res_query], [resolv])
 		AC_SEARCH_LIBS([dn_expand], [resolv])
 		AC_MSG_CHECKING([if res_query will link])
 		AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <netdb.h>
 #include <resolv.h>
 				]], [[
 	res_query (0, 0, 0, 0, 0);
 				]])],
 		    AC_MSG_RESULT([yes]),
 		   [AC_MSG_RESULT([no])
 		    saved_LIBS="$LIBS"
 		    LIBS="$LIBS -lresolv"
 		    AC_MSG_CHECKING([for res_query in -lresolv])
 		    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <netdb.h>
 #include <resolv.h>
 				]], [[
 	res_query (0, 0, 0, 0, 0);
 				]])],
 			[AC_MSG_RESULT([yes])],
 			[LIBS="$saved_LIBS"
 			 AC_MSG_RESULT([no])])
 		    ])
 		AC_CHECK_FUNCS([_getshort _getlong])
 		AC_CHECK_DECLS([_getshort, _getlong], , ,
 		    [#include <sys/types.h>
 		    #include <arpa/nameser.h>])
 		AC_CHECK_MEMBER([HEADER.ad],
 			[AC_DEFINE([HAVE_HEADER_AD], [1],
 			    [Define if HEADER.ad exists in arpa/nameser.h])], ,
 			[#include <arpa/nameser.h>])
 	])
 
 AC_MSG_CHECKING([if struct __res_state _res is an extern])
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdio.h>
 #if HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 #include <netinet/in.h>
 #include <arpa/nameser.h>
 #include <resolv.h>
 extern struct __res_state _res;
 		]], [[
 struct __res_state *volatile p = &_res;  /* force resolution of _res */
 return 0;
 		]],)],
 		[AC_MSG_RESULT([yes])
 		 AC_DEFINE([HAVE__RES_EXTERN], [1],
 		    [Define if you have struct __res_state _res as an extern])
 		],
 		[ AC_MSG_RESULT([no]) ]
 )
 
 # Check whether user wants SELinux support
 SELINUX_MSG="no"
 LIBSELINUX=""
 AC_ARG_WITH([selinux],
 	[  --with-selinux          Enable SELinux support],
 	[ if test "x$withval" != "xno" ; then
 		save_LIBS="$LIBS"
 		AC_DEFINE([WITH_SELINUX], [1],
 			[Define if you want SELinux support.])
 		SELINUX_MSG="yes"
 		AC_CHECK_HEADER([selinux/selinux.h], ,
 			AC_MSG_ERROR([SELinux support requires selinux.h header]))
 		AC_CHECK_LIB([selinux], [setexeccon],
 			[ LIBSELINUX="-lselinux"
 			  LIBS="$LIBS -lselinux"
 			],
 			AC_MSG_ERROR([SELinux support requires libselinux library]))
 		AC_CHECK_FUNCS([getseuserbyname get_default_context_with_level])
 		LIBS="$save_LIBS $LIBSELINUX"
 	fi ]
 )
 AC_SUBST([SSHDLIBS])
 
 # Check whether user wants Kerberos 5 support
 KRB5_MSG="no"
 AC_ARG_WITH([kerberos5],
 	[  --with-kerberos5=PATH   Enable Kerberos 5 support],
 	[ if test "x$withval" != "xno" ; then
 		if test "x$withval" = "xyes" ; then
 			KRB5ROOT="/usr/local"
 		else
 			KRB5ROOT=${withval}
 		fi
 
 		AC_DEFINE([KRB5], [1], [Define if you want Kerberos 5 support])
 		KRB5_MSG="yes"
 
 		use_pkgconfig_for_krb5=
 		if test "x$PKGCONFIG" != "xno"; then
 			AC_MSG_CHECKING([if $PKGCONFIG knows about kerberos5])
 			if "$PKGCONFIG" krb5; then
 				AC_MSG_RESULT([yes])
 				use_pkgconfig_for_krb5=yes
 			else
 				AC_MSG_RESULT([no])
 			fi
 		fi
 		if test "x$use_pkgconfig_for_krb5" = "xyes"; then
 			K5CFLAGS=`$PKGCONFIG --cflags krb5`
 			K5LIBS=`$PKGCONFIG --libs krb5`
 			CPPFLAGS="$CPPFLAGS $K5CFLAGS"
 
 			AC_MSG_CHECKING([for gssapi support])
 			if "$PKGCONFIG" krb5-gssapi; then
 				AC_MSG_RESULT([yes])
 				AC_DEFINE([GSSAPI], [1],
 					[Define this if you want GSSAPI
 					support in the version 2 protocol])
 				GSSCFLAGS="`$PKGCONFIG --cflags krb5-gssapi`"
 				GSSLIBS="`$PKGCONFIG --libs krb5-gssapi`"
 				CPPFLAGS="$CPPFLAGS $GSSCFLAGS"
 			else
 				AC_MSG_RESULT([no])
 			fi
 			AC_MSG_CHECKING([whether we are using Heimdal])
 			AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <krb5.h>
 				]], [[ char *tmp = heimdal_version; ]])],
 				[ AC_MSG_RESULT([yes])
 				AC_DEFINE([HEIMDAL], [1],
 				[Define this if you are using the Heimdal
 				version of Kerberos V5]) ],
 				[AC_MSG_RESULT([no])
 			])
 		else
 			AC_PATH_TOOL([KRB5CONF], [krb5-config],
 				     [$KRB5ROOT/bin/krb5-config],
 				     [$KRB5ROOT/bin:$PATH])
 			if test -x $KRB5CONF ; then
 				K5CFLAGS="`$KRB5CONF --cflags`"
 				K5LIBS="`$KRB5CONF --libs`"
 				CPPFLAGS="$CPPFLAGS $K5CFLAGS"
 
 				AC_MSG_CHECKING([for gssapi support])
 				if $KRB5CONF | grep gssapi >/dev/null ; then
 					AC_MSG_RESULT([yes])
 					AC_DEFINE([GSSAPI], [1],
 						[Define this if you want GSSAPI
 						support in the version 2 protocol])
 					GSSCFLAGS="`$KRB5CONF --cflags gssapi`"
 					GSSLIBS="`$KRB5CONF --libs gssapi`"
 					CPPFLAGS="$CPPFLAGS $GSSCFLAGS"
 				else
 					AC_MSG_RESULT([no])
 				fi
 				AC_MSG_CHECKING([whether we are using Heimdal])
 				AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <krb5.h>
 					]], [[ char *tmp = heimdal_version; ]])],
 					[ AC_MSG_RESULT([yes])
 					AC_DEFINE([HEIMDAL], [1],
 					[Define this if you are using the Heimdal
 					version of Kerberos V5]) ],
 					[AC_MSG_RESULT([no])
 				])
 			else
 				CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include"
 				LDFLAGS="$LDFLAGS -L${KRB5ROOT}/lib"
 				AC_MSG_CHECKING([whether we are using Heimdal])
 				AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <krb5.h>
 					]], [[ char *tmp = heimdal_version; ]])],
 						[ AC_MSG_RESULT([yes])
 						 AC_DEFINE([HEIMDAL])
 						 K5LIBS="-lkrb5"
 						 K5LIBS="$K5LIBS -lcom_err -lasn1"
 						 AC_CHECK_LIB([roken], [net_write],
 						   [K5LIBS="$K5LIBS -lroken"])
 						 AC_CHECK_LIB([des], [des_cbc_encrypt],
 						   [K5LIBS="$K5LIBS -ldes"])
 					       ], [ AC_MSG_RESULT([no])
 						 K5LIBS="-lkrb5 -lk5crypto -lcom_err"
 				])
 				AC_SEARCH_LIBS([dn_expand], [resolv])
 
 				AC_CHECK_LIB([gssapi_krb5], [gss_init_sec_context],
 					[ AC_DEFINE([GSSAPI])
 					  GSSLIBS="-lgssapi_krb5" ],
 					[ AC_CHECK_LIB([gssapi], [gss_init_sec_context],
 						[ AC_DEFINE([GSSAPI])
 						  GSSLIBS="-lgssapi" ],
 						[ AC_CHECK_LIB([gss], [gss_init_sec_context],
 							[ AC_DEFINE([GSSAPI])
 							  GSSLIBS="-lgss" ],
 							AC_MSG_WARN([Cannot find any suitable gss-api library - build may fail]))
 						])
 					])
 
 				AC_CHECK_HEADER([gssapi.h], ,
 					[ unset ac_cv_header_gssapi_h
 					  CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
 					  AC_CHECK_HEADERS([gssapi.h], ,
 						AC_MSG_WARN([Cannot find any suitable gss-api header - build may fail])
 					  )
 					]
 				)
 
 				oldCPP="$CPPFLAGS"
 				CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
 				AC_CHECK_HEADER([gssapi_krb5.h], ,
 						[ CPPFLAGS="$oldCPP" ])
 
 			fi
 		fi
 		if test -n "${rpath_opt}" ; then
 			LDFLAGS="$LDFLAGS ${rpath_opt}${KRB5ROOT}/lib"
 		fi
 		if test ! -z "$blibpath" ; then
 			blibpath="$blibpath:${KRB5ROOT}/lib"
 		fi
 
 		AC_CHECK_HEADERS([gssapi.h gssapi/gssapi.h])
 		AC_CHECK_HEADERS([gssapi_krb5.h gssapi/gssapi_krb5.h])
 		AC_CHECK_HEADERS([gssapi_generic.h gssapi/gssapi_generic.h])
 
 		AC_SEARCH_LIBS([k_hasafs], [kafs], [AC_DEFINE([USE_AFS], [1],
 			[Define this if you want to use libkafs' AFS support])])
 
 		AC_CHECK_DECLS([GSS_C_NT_HOSTBASED_SERVICE], [], [], [[
 #ifdef HAVE_GSSAPI_H
 # include <gssapi.h>
 #elif defined(HAVE_GSSAPI_GSSAPI_H)
 # include <gssapi/gssapi.h>
 #endif
 
 #ifdef HAVE_GSSAPI_GENERIC_H
 # include <gssapi_generic.h>
 #elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
 # include <gssapi/gssapi_generic.h>
 #endif
 		]])
 		saved_LIBS="$LIBS"
 		LIBS="$LIBS $K5LIBS"
 		AC_CHECK_FUNCS([krb5_cc_new_unique krb5_get_error_message krb5_free_error_message])
 		LIBS="$saved_LIBS"
 
 	fi
 	]
 )
 AC_SUBST([GSSLIBS])
 AC_SUBST([K5LIBS])
 AC_SUBST([CHANNELLIBS])
 
 # Looking for programs, paths and files
 
 PRIVSEP_PATH=/var/empty
 AC_ARG_WITH([privsep-path],
 	[  --with-privsep-path=xxx Path for privilege separation chroot (default=/var/empty)],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			PRIVSEP_PATH=$withval
 		fi
 	]
 )
 AC_SUBST([PRIVSEP_PATH])
 
 AC_ARG_WITH([xauth],
 	[  --with-xauth=PATH       Specify path to xauth program ],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			xauth_path=$withval
 		fi
 	],
 	[
 		TestPath="$PATH"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/X/bin"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/bin/X11"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/X11R6/bin"
 		TestPath="${TestPath}${PATH_SEPARATOR}/usr/openwin/bin"
 		AC_PATH_PROG([xauth_path], [xauth], , [$TestPath])
 		if (test ! -z "$xauth_path" && test -x "/usr/openwin/bin/xauth") ; then
 			xauth_path="/usr/openwin/bin/xauth"
 		fi
 	]
 )
 
 STRIP_OPT=-s
 AC_ARG_ENABLE([strip],
 	[  --disable-strip         Disable calling strip(1) on install],
 	[
 		if test "x$enableval" = "xno" ; then
 			STRIP_OPT=
 		fi
 	]
 )
 AC_SUBST([STRIP_OPT])
 
 if test -z "$xauth_path" ; then
 	XAUTH_PATH="undefined"
 	AC_SUBST([XAUTH_PATH])
 else
 	AC_DEFINE_UNQUOTED([XAUTH_PATH], ["$xauth_path"],
 		[Define if xauth is found in your path])
 	XAUTH_PATH=$xauth_path
 	AC_SUBST([XAUTH_PATH])
 fi
 
 dnl # --with-maildir=/path/to/mail gets top priority.
 dnl # if maildir is set in the platform case statement above we use that.
 dnl # Otherwise we run a program to get the dir from system headers.
 dnl # We first look for _PATH_MAILDIR then MAILDIR then _PATH_MAIL
 dnl # If we find _PATH_MAILDIR we do nothing because that is what
 dnl # session.c expects anyway. Otherwise we set to the value found
 dnl # stripping any trailing slash. If for some strage reason our program
 dnl # does not find what it needs, we default to /var/spool/mail.
 # Check for mail directory
 AC_ARG_WITH([maildir],
     [  --with-maildir=/path/to/mail    Specify your system mail directory],
     [
 	if test "X$withval" != X  &&  test "x$withval" != xno  &&  \
 	    test "x${withval}" != xyes; then
 		AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$withval"],
             [Set this to your mail directory if you do not have _PATH_MAILDIR])
 	    fi
      ],[
 	if test "X$maildir" != "X"; then
 	    AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$maildir"])
 	else
 	    AC_MSG_CHECKING([Discovering system mail directory])
 	    AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #ifdef HAVE_MAILLOCK_H
 #include <maillock.h>
 #endif
 #define DATA "conftest.maildir"
 	]], [[
 	FILE *fd;
 	int rc;
 
 	fd = fopen(DATA,"w");
 	if(fd == NULL)
 		exit(1);
 
 #if defined (_PATH_MAILDIR)
 	if ((rc = fprintf(fd ,"_PATH_MAILDIR:%s\n", _PATH_MAILDIR)) <0)
 		exit(1);
 #elif defined (MAILDIR)
 	if ((rc = fprintf(fd ,"MAILDIR:%s\n", MAILDIR)) <0)
 		exit(1);
 #elif defined (_PATH_MAIL)
 	if ((rc = fprintf(fd ,"_PATH_MAIL:%s\n", _PATH_MAIL)) <0)
 		exit(1);
 #else
 	exit (2);
 #endif
 
 	exit(0);
 		]])],
 		[
 		    maildir_what=`awk -F: '{print $1}' conftest.maildir`
 		    maildir=`awk -F: '{print $2}' conftest.maildir \
 			| sed 's|/$||'`
 		    AC_MSG_RESULT([Using: $maildir from $maildir_what])
 		    if test "x$maildir_what" != "x_PATH_MAILDIR"; then
 			AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$maildir"])
 		    fi
 		],
 		[
 		    if test "X$ac_status" = "X2";then
 # our test program didn't find it. Default to /var/spool/mail
 			AC_MSG_RESULT([Using: default value of /var/spool/mail])
 			AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["/var/spool/mail"])
 		     else
 			AC_MSG_RESULT([*** not found ***])
 		     fi
 		],
 		[
 			AC_MSG_WARN([cross compiling: use --with-maildir=/path/to/mail])
 		]
 	    )
 	fi
     ]
 ) # maildir
 
 if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes"; then
 	AC_MSG_WARN([cross compiling: Disabling /dev/ptmx test])
 	disable_ptmx_check=yes
 fi
 if test -z "$no_dev_ptmx" ; then
 	if test "x$disable_ptmx_check" != "xyes" ; then
 		AC_CHECK_FILE(["/dev/ptmx"],
 			[
 				AC_DEFINE_UNQUOTED([HAVE_DEV_PTMX], [1],
 					[Define if you have /dev/ptmx])
 				have_dev_ptmx=1
 			]
 		)
 	fi
 fi
 
 if test ! -z "$cross_compiling" && test "x$cross_compiling" != "xyes"; then
 	AC_CHECK_FILE(["/dev/ptc"],
 		[
 			AC_DEFINE_UNQUOTED([HAVE_DEV_PTS_AND_PTC], [1],
 				[Define if you have /dev/ptc])
 			have_dev_ptc=1
 		]
 	)
 else
 	AC_MSG_WARN([cross compiling: Disabling /dev/ptc test])
 fi
 
 # Options from here on. Some of these are preset by platform above
 AC_ARG_WITH([mantype],
 	[  --with-mantype=man|cat|doc  Set man page type],
 	[
 		case "$withval" in
 		man|cat|doc)
 			MANTYPE=$withval
 			;;
 		*)
 			AC_MSG_ERROR([invalid man type: $withval])
 			;;
 		esac
 	]
 )
 if test -z "$MANTYPE"; then
 	if ${MANDOC} ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=doc
 	elif ${NROFF} -mdoc ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=doc
 	elif ${NROFF} -man ${srcdir}/ssh.1 >/dev/null 2>&1; then
 		MANTYPE=man
 	else
 		MANTYPE=cat
 	fi
 fi
 AC_SUBST([MANTYPE])
 if test "$MANTYPE" = "doc"; then
 	mansubdir=man;
 else
 	mansubdir=$MANTYPE;
 fi
 AC_SUBST([mansubdir])
 
 # Whether to disable shadow password support
 AC_ARG_WITH([shadow],
 	[  --without-shadow        Disable shadow password support],
 	[
 		if test "x$withval" = "xno" ; then
 			AC_DEFINE([DISABLE_SHADOW])
 			disable_shadow=yes
 		fi
 	]
 )
 
 if test -z "$disable_shadow" ; then
 	AC_MSG_CHECKING([if the systems has expire shadow information])
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <shadow.h>
 struct spwd sp;
 		]], [[ sp.sp_expire = sp.sp_lstchg = sp.sp_inact = 0; ]])],
 		[ sp_expire_available=yes ], [
 	])
 
 	if test "x$sp_expire_available" = "xyes" ; then
 		AC_MSG_RESULT([yes])
 		AC_DEFINE([HAS_SHADOW_EXPIRE], [1],
 		    [Define if you want to use shadow password expire field])
 	else
 		AC_MSG_RESULT([no])
 	fi
 fi
 
 # Use ip address instead of hostname in $DISPLAY
 if test ! -z "$IPADDR_IN_DISPLAY" ; then
 	DISPLAY_HACK_MSG="yes"
 	AC_DEFINE([IPADDR_IN_DISPLAY], [1],
 		[Define if you need to use IP address
 		instead of hostname in $DISPLAY])
 else
 	DISPLAY_HACK_MSG="no"
 	AC_ARG_WITH([ipaddr-display],
 		[  --with-ipaddr-display   Use ip address instead of hostname in $DISPLAY],
 		[
 			if test "x$withval" != "xno" ; then
 				AC_DEFINE([IPADDR_IN_DISPLAY])
 				DISPLAY_HACK_MSG="yes"
 			fi
 		]
 	)
 fi
 
 # check for /etc/default/login and use it if present.
 AC_ARG_ENABLE([etc-default-login],
 	[  --disable-etc-default-login Disable using PATH from /etc/default/login [no]],
 	[ if test "x$enableval" = "xno"; then
 		AC_MSG_NOTICE([/etc/default/login handling disabled])
 		etc_default_login=no
 	  else
 		etc_default_login=yes
 	  fi ],
 	[ if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes";
 	  then
 		AC_MSG_WARN([cross compiling: not checking /etc/default/login])
 		etc_default_login=no
 	  else
 		etc_default_login=yes
 	  fi ]
 )
 
 if test "x$etc_default_login" != "xno"; then
 	AC_CHECK_FILE(["/etc/default/login"],
 	    [ external_path_file=/etc/default/login ])
 	if test "x$external_path_file" = "x/etc/default/login"; then
 		AC_DEFINE([HAVE_ETC_DEFAULT_LOGIN], [1],
 			[Define if your system has /etc/default/login])
 	fi
 fi
 
 dnl BSD systems use /etc/login.conf so --with-default-path= has no effect
 if test $ac_cv_func_login_getcapbool = "yes" && \
 	test $ac_cv_header_login_cap_h = "yes" ; then
 	external_path_file=/etc/login.conf
 fi
 
 # Whether to mess with the default path
 SERVER_PATH_MSG="(default)"
 AC_ARG_WITH([default-path],
 	[  --with-default-path=    Specify default $PATH environment for server],
 	[
 		if test "x$external_path_file" = "x/etc/login.conf" ; then
 			AC_MSG_WARN([
 --with-default-path=PATH has no effect on this system.
 Edit /etc/login.conf instead.])
 		elif test "x$withval" != "xno" ; then
 			if test ! -z "$external_path_file" ; then
 				AC_MSG_WARN([
 --with-default-path=PATH will only be used if PATH is not defined in
 $external_path_file .])
 			fi
 			user_path="$withval"
 			SERVER_PATH_MSG="$withval"
 		fi
 	],
 	[ if test "x$external_path_file" = "x/etc/login.conf" ; then
 		AC_MSG_WARN([Make sure the path to scp is in /etc/login.conf])
 	else
 		if test ! -z "$external_path_file" ; then
 			AC_MSG_WARN([
 If PATH is defined in $external_path_file, ensure the path to scp is included,
 otherwise scp will not work.])
 		fi
 		AC_RUN_IFELSE(
 			[AC_LANG_PROGRAM([[
 /* find out what STDPATH is */
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #ifndef _PATH_STDPATH
 # ifdef _PATH_USERPATH	/* Irix */
 #  define _PATH_STDPATH _PATH_USERPATH
 # else
 #  define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
 # endif
 #endif
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #define DATA "conftest.stdpath"
 			]], [[
 	FILE *fd;
 	int rc;
 
 	fd = fopen(DATA,"w");
 	if(fd == NULL)
 		exit(1);
 
 	if ((rc = fprintf(fd,"%s", _PATH_STDPATH)) < 0)
 		exit(1);
 
 	exit(0);
 		]])],
 		[ user_path=`cat conftest.stdpath` ],
 		[ user_path="/usr/bin:/bin:/usr/sbin:/sbin" ],
 		[ user_path="/usr/bin:/bin:/usr/sbin:/sbin" ]
 	)
 # make sure $bindir is in USER_PATH so scp will work
 		t_bindir="${bindir}"
 		while echo "${t_bindir}" | egrep '\$\{|NONE/' >/dev/null 2>&1; do
 			t_bindir=`eval echo ${t_bindir}`
 			case $t_bindir in
 				NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$prefix~"` ;;
 			esac
 			case $t_bindir in
 				NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$ac_default_prefix~"` ;;
 			esac
 		done
 		echo $user_path | grep ":$t_bindir"  > /dev/null 2>&1
 		if test $? -ne 0  ; then
 			echo $user_path | grep "^$t_bindir"  > /dev/null 2>&1
 			if test $? -ne 0  ; then
 				user_path=$user_path:$t_bindir
 				AC_MSG_RESULT([Adding $t_bindir to USER_PATH so scp will work])
 			fi
 		fi
 	fi ]
 )
 if test "x$external_path_file" != "x/etc/login.conf" ; then
 	AC_DEFINE_UNQUOTED([USER_PATH], ["$user_path"], [Specify default $PATH])
 	AC_SUBST([user_path])
 fi
 
 # Set superuser path separately to user path
 AC_ARG_WITH([superuser-path],
 	[  --with-superuser-path=  Specify different path for super-user],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			AC_DEFINE_UNQUOTED([SUPERUSER_PATH], ["$withval"],
 				[Define if you want a different $PATH
 				for the superuser])
 			superuser_path=$withval
 		fi
 	]
 )
 
 
 AC_MSG_CHECKING([if we need to convert IPv4 in IPv6-mapped addresses])
 IPV4_IN6_HACK_MSG="no"
 AC_ARG_WITH(4in6,
 	[  --with-4in6             Check for and convert IPv4 in IPv6 mapped addresses],
 	[
 		if test "x$withval" != "xno" ; then
 			AC_MSG_RESULT([yes])
 			AC_DEFINE([IPV4_IN_IPV6], [1],
 				[Detect IPv4 in IPv6 mapped addresses
 				and treat as IPv4])
 			IPV4_IN6_HACK_MSG="yes"
 		else
 			AC_MSG_RESULT([no])
 		fi
 	], [
 		if test "x$inet6_default_4in6" = "xyes"; then
 			AC_MSG_RESULT([yes (default)])
 			AC_DEFINE([IPV4_IN_IPV6])
 			IPV4_IN6_HACK_MSG="yes"
 		else
 			AC_MSG_RESULT([no (default)])
 		fi
 	]
 )
 
 # Whether to enable BSD auth support
 BSD_AUTH_MSG=no
 AC_ARG_WITH([bsd-auth],
 	[  --with-bsd-auth         Enable BSD auth support],
 	[
 		if test "x$withval" != "xno" ; then
 			AC_DEFINE([BSD_AUTH], [1],
 				[Define if you have BSD auth support])
 			BSD_AUTH_MSG=yes
 		fi
 	]
 )
 
 # Where to place sshd.pid
 piddir=/var/run
 # make sure the directory exists
 if test ! -d $piddir ; then
 	piddir=`eval echo ${sysconfdir}`
 	case $piddir in
 		NONE/*) piddir=`echo $piddir | sed "s~NONE~$ac_default_prefix~"` ;;
 	esac
 fi
 
 AC_ARG_WITH([pid-dir],
 	[  --with-pid-dir=PATH     Specify location of sshd.pid file],
 	[
 		if test -n "$withval"  &&  test "x$withval" != "xno"  &&  \
 		    test "x${withval}" != "xyes"; then
 			piddir=$withval
 			if test ! -d $piddir ; then
 			AC_MSG_WARN([** no $piddir directory on this system **])
 			fi
 		fi
 	]
 )
 
 AC_DEFINE_UNQUOTED([_PATH_SSH_PIDDIR], ["$piddir"],
 	[Specify location of ssh.pid])
 AC_SUBST([piddir])
 
+
+AC_ARG_ENABLE([fd-passing],
+	[  --disable-fd-passing    disable file descriptor passsing [no]],
+	[
+		if test "x$enableval" = "xno" ; then
+			AC_DEFINE([DISABLE_FD_PASSING])
+		fi
+	]
+)
+
 dnl allow user to disable some login recording features
 AC_ARG_ENABLE([lastlog],
 	[  --disable-lastlog       disable use of lastlog even if detected [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_LASTLOG])
 		fi
 	]
 )
 AC_ARG_ENABLE([utmp],
 	[  --disable-utmp          disable use of utmp even if detected [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_UTMP])
 		fi
 	]
 )
 AC_ARG_ENABLE([utmpx],
 	[  --disable-utmpx         disable use of utmpx even if detected [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_UTMPX], [1],
 				[Define if you don't want to use utmpx])
 		fi
 	]
 )
 AC_ARG_ENABLE([wtmp],
 	[  --disable-wtmp          disable use of wtmp even if detected [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_WTMP])
 		fi
 	]
 )
 AC_ARG_ENABLE([wtmpx],
 	[  --disable-wtmpx         disable use of wtmpx even if detected [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_WTMPX], [1],
 				[Define if you don't want to use wtmpx])
 		fi
 	]
 )
 AC_ARG_ENABLE([libutil],
 	[  --disable-libutil       disable use of libutil (login() etc.) [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_LOGIN])
 		fi
 	]
 )
 AC_ARG_ENABLE([pututline],
 	[  --disable-pututline     disable use of pututline() etc. ([uw]tmp) [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_PUTUTLINE], [1],
 				[Define if you don't want to use pututline()
 				etc. to write [uw]tmp])
 		fi
 	]
 )
 AC_ARG_ENABLE([pututxline],
 	[  --disable-pututxline    disable use of pututxline() etc. ([uw]tmpx) [no]],
 	[
 		if test "x$enableval" = "xno" ; then
 			AC_DEFINE([DISABLE_PUTUTXLINE], [1],
 				[Define if you don't want to use pututxline()
 				etc. to write [uw]tmpx])
 		fi
 	]
 )
 AC_ARG_WITH([lastlog],
   [  --with-lastlog=FILE|DIR specify lastlog location [common locations]],
 	[
 		if test "x$withval" = "xno" ; then
 			AC_DEFINE([DISABLE_LASTLOG])
 		elif test -n "$withval"  &&  test "x${withval}" != "xyes"; then
 			conf_lastlog_location=$withval
 		fi
 	]
 )
 
 dnl lastlog, [uw]tmpx? detection
 dnl  NOTE: set the paths in the platform section to avoid the
 dnl   need for command-line parameters
 dnl lastlog and [uw]tmp are subject to a file search if all else fails
 
 dnl lastlog detection
 dnl  NOTE: the code itself will detect if lastlog is a directory
 AC_MSG_CHECKING([if your system defines LASTLOG_FILE])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_LASTLOG_H
 #  include <lastlog.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 #ifdef HAVE_LOGIN_H
 # include <login.h>
 #endif
 	]], [[ char *lastlog = LASTLOG_FILE; ]])],
 		[ AC_MSG_RESULT([yes]) ],
 		[
 		AC_MSG_RESULT([no])
 		AC_MSG_CHECKING([if your system defines _PATH_LASTLOG])
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_LASTLOG_H
 #  include <lastlog.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 		]], [[ char *lastlog = _PATH_LASTLOG; ]])],
 		[ AC_MSG_RESULT([yes]) ],
 		[
 			AC_MSG_RESULT([no])
 			system_lastlog_path=no
 		])
 ])
 
 if test -z "$conf_lastlog_location"; then
 	if test x"$system_lastlog_path" = x"no" ; then
 		for f in /var/log/lastlog /usr/adm/lastlog /var/adm/lastlog /etc/security/lastlog ; do
 				if (test -d "$f" || test -f "$f") ; then
 					conf_lastlog_location=$f
 				fi
 		done
 		if test -z "$conf_lastlog_location"; then
 			AC_MSG_WARN([** Cannot find lastlog **])
 			dnl Don't define DISABLE_LASTLOG - that means we don't try wtmp/wtmpx
 		fi
 	fi
 fi
 
 if test -n "$conf_lastlog_location"; then
 	AC_DEFINE_UNQUOTED([CONF_LASTLOG_FILE], ["$conf_lastlog_location"],
 		[Define if you want to specify the path to your lastlog file])
 fi
 
 dnl utmp detection
 AC_MSG_CHECKING([if your system defines UTMP_FILE])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 	]], [[ char *utmp = UTMP_FILE; ]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_RESULT([no])
 	  system_utmp_path=no
 ])
 if test -z "$conf_utmp_location"; then
 	if test x"$system_utmp_path" = x"no" ; then
 		for f in /etc/utmp /usr/adm/utmp /var/run/utmp; do
 			if test -f $f ; then
 				conf_utmp_location=$f
 			fi
 		done
 		if test -z "$conf_utmp_location"; then
 			AC_DEFINE([DISABLE_UTMP])
 		fi
 	fi
 fi
 if test -n "$conf_utmp_location"; then
 	AC_DEFINE_UNQUOTED([CONF_UTMP_FILE], ["$conf_utmp_location"],
 		[Define if you want to specify the path to your utmp file])
 fi
 
 dnl wtmp detection
 AC_MSG_CHECKING([if your system defines WTMP_FILE])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 	]], [[ char *wtmp = WTMP_FILE; ]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_RESULT([no])
 	  system_wtmp_path=no
 ])
 if test -z "$conf_wtmp_location"; then
 	if test x"$system_wtmp_path" = x"no" ; then
 		for f in /usr/adm/wtmp /var/log/wtmp; do
 			if test -f $f ; then
 				conf_wtmp_location=$f
 			fi
 		done
 		if test -z "$conf_wtmp_location"; then
 			AC_DEFINE([DISABLE_WTMP])
 		fi
 	fi
 fi
 if test -n "$conf_wtmp_location"; then
 	AC_DEFINE_UNQUOTED([CONF_WTMP_FILE], ["$conf_wtmp_location"],
 		[Define if you want to specify the path to your wtmp file])
 fi
 
 dnl wtmpx detection
 AC_MSG_CHECKING([if your system defines WTMPX_FILE])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <utmp.h>
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_PATHS_H
 #  include <paths.h>
 #endif
 	]], [[ char *wtmpx = WTMPX_FILE; ]])],
 	[ AC_MSG_RESULT([yes]) ],
 	[ AC_MSG_RESULT([no])
 	  system_wtmpx_path=no
 ])
 if test -z "$conf_wtmpx_location"; then
 	if test x"$system_wtmpx_path" = x"no" ; then
 		AC_DEFINE([DISABLE_WTMPX])
 	fi
 else
 	AC_DEFINE_UNQUOTED([CONF_WTMPX_FILE], ["$conf_wtmpx_location"],
 		[Define if you want to specify the path to your wtmpx file])
 fi
 
 
 if test ! -z "$blibpath" ; then
 	LDFLAGS="$LDFLAGS $blibflags$blibpath"
 	AC_MSG_WARN([Please check and edit blibpath in LDFLAGS in Makefile])
 fi
 
 AC_CHECK_MEMBER([struct lastlog.ll_line], [], [
     if test x$SKIP_DISABLE_LASTLOG_DEFINE != "xyes" ; then
 	AC_DEFINE([DISABLE_LASTLOG])
     fi
 	], [
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #ifdef HAVE_UTMP_H
 #include <utmp.h>
 #endif
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_LASTLOG_H
 #include <lastlog.h>
 #endif
 	])
 
 AC_CHECK_MEMBER([struct utmp.ut_line], [], [
 	AC_DEFINE([DISABLE_UTMP])
 	AC_DEFINE([DISABLE_WTMP])
 	], [
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
 #ifdef HAVE_UTMP_H
 #include <utmp.h>
 #endif
 #ifdef HAVE_UTMPX_H
 #include <utmpx.h>
 #endif
 #ifdef HAVE_LASTLOG_H
 #include <lastlog.h>
 #endif
 	])
 
 dnl Adding -Werror to CFLAGS early prevents configure tests from running.
 dnl Add now.
 CFLAGS="$CFLAGS $werror_flags"
 
 if test "x$ac_cv_func_getaddrinfo" != "xyes" ; then
 	TEST_SSH_IPV6=no
 else
 	TEST_SSH_IPV6=yes
 fi
 AC_CHECK_DECL([BROKEN_GETADDRINFO],  [TEST_SSH_IPV6=no])
 AC_SUBST([TEST_SSH_IPV6], [$TEST_SSH_IPV6])
 AC_SUBST([TEST_SSH_UTF8], [$TEST_SSH_UTF8])
 AC_SUBST([TEST_MALLOC_OPTIONS], [$TEST_MALLOC_OPTIONS])
 AC_SUBST([UNSUPPORTED_ALGORITHMS], [$unsupported_algorithms])
 AC_SUBST([DEPEND], [$(cat $srcdir/.depend)])
 
 # Binaries for interop tests.
 AC_PATH_PROG([PLINK], [plink])
 AC_PATH_PROG([PUTTYGEN], [puttygen])
 AC_PATH_PROG([CONCH], [conch])
 AC_PATH_PROG([DROPBEAR], [dropbear])
 AC_PATH_PROG([DBCLIENT], [dbclient])
 AC_PATH_PROG([DROPBEARKEY], [dropbearkey])
 AC_PATH_PROG([DROPBEARCONVERT], [dropbearconvert])
 
 CFLAGS="${CFLAGS} ${CFLAGS_AFTER}"
 LDFLAGS="${LDFLAGS} ${LDFLAGS_AFTER}"
 
 # Make a copy of CFLAGS/LDFLAGS without PIE options.
 LDFLAGS_NOPIE=`echo "$LDFLAGS" | sed 's/ -pie//'`
 CFLAGS_NOPIE=`echo "$CFLAGS" | sed 's/ -fPIE//'`
 AC_SUBST([LDFLAGS_NOPIE])
 AC_SUBST([CFLAGS_NOPIE])
 
 AC_EXEEXT
 AC_CONFIG_FILES([Makefile buildpkg.sh opensshd.init openssh.xml \
 	openbsd-compat/Makefile openbsd-compat/regress/Makefile \
 	survey.sh])
 AC_OUTPUT
 
 # Print summary of options
 
 # Someone please show me a better way :)
 A=`eval echo ${prefix}` ; A=`eval echo ${A}`
 B=`eval echo ${bindir}` ; B=`eval echo ${B}`
 C=`eval echo ${sbindir}` ; C=`eval echo ${C}`
 D=`eval echo ${sysconfdir}` ; D=`eval echo ${D}`
 E=`eval echo ${libexecdir}/ssh-askpass` ; E=`eval echo ${E}`
 F=`eval echo ${mandir}/${mansubdir}X` ; F=`eval echo ${F}`
 G=`eval echo ${piddir}` ; G=`eval echo ${G}`
 H=`eval echo ${PRIVSEP_PATH}` ; H=`eval echo ${H}`
 I=`eval echo ${user_path}` ; I=`eval echo ${I}`
 J=`eval echo ${superuser_path}` ; J=`eval echo ${J}`
 
 echo ""
 echo "OpenSSH has been configured with the following options:"
 echo "                     User binaries: $B"
 echo "                   System binaries: $C"
 echo "               Configuration files: $D"
 echo "                   Askpass program: $E"
 echo "                      Manual pages: $F"
 echo "                          PID file: $G"
 echo "  Privilege separation chroot path: $H"
 if test "x$external_path_file" = "x/etc/login.conf" ; then
 echo "   At runtime, sshd will use the path defined in $external_path_file"
 echo "   Make sure the path to scp is present, otherwise scp will not work"
 else
 echo "            sshd default user PATH: $I"
 	if test ! -z "$external_path_file"; then
 echo "   (If PATH is set in $external_path_file it will be used instead. If"
 echo "   used, ensure the path to scp is present, otherwise scp will not work.)"
 	fi
 fi
 if test ! -z "$superuser_path" ; then
 echo "          sshd superuser user PATH: $J"
 fi
 echo "                    Manpage format: $MANTYPE"
 echo "                       PAM support: $PAM_MSG"
 echo "                   OSF SIA support: $SIA_MSG"
 echo "                 KerberosV support: $KRB5_MSG"
 echo "                   SELinux support: $SELINUX_MSG"
 echo "                   libedit support: $LIBEDIT_MSG"
 echo "                   libldns support: $LDNS_MSG"
 echo "  Solaris process contract support: $SPC_MSG"
 echo "           Solaris project support: $SP_MSG"
 echo "         Solaris privilege support: $SPP_MSG"
 echo "       IP address in \$DISPLAY hack: $DISPLAY_HACK_MSG"
 echo "           Translate v4 in v6 hack: $IPV4_IN6_HACK_MSG"
 echo "                  BSD Auth support: $BSD_AUTH_MSG"
 echo "              Random number source: $RAND_MSG"
 echo "             Privsep sandbox style: $SANDBOX_STYLE"
 echo "                   PKCS#11 support: $enable_pkcs11"
 echo "                  U2F/FIDO support: $enable_sk"
 
 echo ""
 
 echo "              Host: ${host}"
 echo "          Compiler: ${CC}"
 echo "    Compiler flags: ${CFLAGS}"
 echo "Preprocessor flags: ${CPPFLAGS}"
 echo "      Linker flags: ${LDFLAGS}"
 echo "         Libraries: ${LIBS}"
 if test ! -z "${CHANNELLIBS}"; then
 echo "     +for channels: ${CHANNELLIBS}"
 fi
 if test ! -z "${LIBFIDO2}"; then
 echo "        +for FIDO2: ${LIBFIDO2}"
 fi
 if test ! -z "${SSHDLIBS}"; then
 echo "         +for sshd: ${SSHDLIBS}"
 fi
 
 echo ""
 
 if test "x$MAKE_PACKAGE_SUPPORTED" = "xyes" ; then
 	echo "SVR4 style packages are supported with \"make package\""
 	echo ""
 fi
 
 if test "x$PAM_MSG" = "xyes" ; then
 	echo "PAM is enabled. You may need to install a PAM control file "
 	echo "for sshd, otherwise password authentication may fail. "
 	echo "Example PAM control files can be found in the contrib/ "
 	echo "subdirectory"
 	echo ""
 fi
 
 if test ! -z "$NO_PEERCHECK" ; then
 	echo "WARNING: the operating system that you are using does not"
 	echo "appear to support getpeereid(), getpeerucred() or the"
 	echo "SO_PEERCRED getsockopt() option. These facilities are used to"
 	echo "enforce security checks to prevent unauthorised connections to"
 	echo "ssh-agent. Their absence increases the risk that a malicious"
 	echo "user can connect to your agent."
 	echo ""
 fi
 
 if test "$AUDIT_MODULE" = "bsm" ; then
 	echo "WARNING: BSM audit support is currently considered EXPERIMENTAL."
 	echo "See the Solaris section in README.platform for details."
 fi
diff --git a/contrib/redhat/openssh.spec b/contrib/redhat/openssh.spec
index 0524a72b40af..b2309716f224 100644
--- a/contrib/redhat/openssh.spec
+++ b/contrib/redhat/openssh.spec
@@ -1,854 +1,854 @@
-%global ver 9.6p1
+%global ver 9.7p1
 %global rel 1%{?dist}
 
 # OpenSSH privilege separation requires a user & group ID
 %global sshd_uid    74
 %global sshd_gid    74
 
 # Version of ssh-askpass
 %global aversion 1.2.4.1
 
 # Do we want to disable building of x11-askpass? (1=yes 0=no)
 %global no_x11_askpass 0
 
 # Do we want to disable building of gnome-askpass? (1=yes 0=no)
 %global no_gnome_askpass 0
 
 # Do we want to link against a static libcrypto? (1=yes 0=no)
 %global static_libcrypto 0
 
 # Do we want smartcard support (1=yes 0=no)
 %global scard 0
 
 # Use GTK2 instead of GNOME in gnome-ssh-askpass
 %global gtk2 1
 
 # Use build6x options for older RHEL builds
 # RHEL 7 not yet supported
 %if 0%{?rhel} > 6
 %global build6x 0
 %else
 %global build6x 1
 %endif
 
 %global without_openssl 0
 # build without openssl where 1.1.1 is not available
 %if 0%{?fedora} <= 28
 %global without_openssl 1
 %endif
 %if 0%{?rhel} <= 7
 %global without_openssl 1
 %endif
 
 # Do we want kerberos5 support (1=yes 0=no)
 %global kerberos5 1
 
 # Reserve options to override askpass settings with:
 # rpm -ba|--rebuild --define 'skip_xxx 1'
 %{?skip_x11_askpass:%global no_x11_askpass 1}
 %{?skip_gnome_askpass:%global no_gnome_askpass 1}
 
 # Add option to build without GTK2 for older platforms with only GTK+.
 # RedHat <= 7.2 and Red Hat Advanced Server 2.1 are examples.
 # rpm -ba|--rebuild --define 'no_gtk2 1'
 %{?no_gtk2:%global gtk2 0}
 
 # Is this a build for RHL 6.x or earlier?
 %{?build_6x:%global build6x 1}
 
 # If this is RHL 6.x, the default configuration has sysconfdir in /usr/etc.
 %if %{build6x}
 %global _sysconfdir /etc
 %endif
 
 # Options for static OpenSSL link:
 # rpm -ba|--rebuild --define "static_openssl 1"
 %{?static_openssl:%global static_libcrypto 1}
 
 # Options for Smartcard support: (needs libsectok and openssl-engine)
 # rpm -ba|--rebuild --define "smartcard 1"
 %{?smartcard:%global scard 1}
 
 # Is this a build for the rescue CD (without PAM)? (1=yes 0=no)
 %global rescue 0
 %{?build_rescue:%global rescue 1}
 
 # Turn off some stuff for resuce builds
 %if %{rescue}
 %global kerberos5 0
 %endif
 
 Summary: The OpenSSH implementation of SSH protocol version 2.
 Name: openssh
 Version: %{ver}
 %if %{rescue}
 Release: %{rel}rescue
 %else
 Release: %{rel}
 %endif
 URL: https://www.openssh.com/portable.html
 Source0: https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-%{version}.tar.gz
 Source1: http://www.jmknoble.net/software/x11-ssh-askpass/x11-ssh-askpass-%{aversion}.tar.gz
 License: BSD
 Group: Applications/Internet
 BuildRoot: %{_tmppath}/%{name}-%{version}-buildroot
 Obsoletes: ssh
 %if %{build6x}
 PreReq: initscripts >= 5.00
 %else
 Requires: initscripts >= 5.20
 %endif
 BuildRequires: perl
 %if ! %{without_openssl}
 BuildRequires: openssl-devel >= 1.1.1
 %endif
 BuildRequires: /bin/login
 %if ! %{build6x}
 BuildRequires: glibc-devel, pam
 %else
 BuildRequires: /usr/include/security/pam_appl.h
 %endif
 %if ! %{no_x11_askpass}
 BuildRequires: /usr/include/X11/Xlib.h
 # Xt development tools
 BuildRequires: libXt-devel
 # Provides xmkmf
 BuildRequires: imake
 # Rely on relatively recent gtk
 BuildRequires: gtk2-devel
 %endif
 %if ! %{no_gnome_askpass}
 BuildRequires: pkgconfig
 %endif
 %if %{kerberos5}
 BuildRequires: krb5-devel
 BuildRequires: krb5-libs
 %endif
 
 %package clients
 Summary: OpenSSH clients.
 Requires: openssh = %{version}-%{release}
 Group: Applications/Internet
 Obsoletes: ssh-clients
 
 %package server
 Summary: The OpenSSH server daemon.
 Group: System Environment/Daemons
 Obsoletes: ssh-server
 Requires: openssh = %{version}-%{release}, chkconfig >= 0.9
 %if ! %{build6x}
 Requires: /etc/pam.d/system-auth
 %endif
 
 %package askpass
 Summary: A passphrase dialog for OpenSSH and X.
 Group: Applications/Internet
 Requires: openssh = %{version}-%{release}
 Obsoletes: ssh-extras
 
 %package askpass-gnome
 Summary: A passphrase dialog for OpenSSH, X, and GNOME.
 Group: Applications/Internet
 Requires: openssh = %{version}-%{release}
 Obsoletes: ssh-extras
 
 %description
 SSH (Secure SHell) is a program for logging into and executing
 commands on a remote machine. SSH is intended to replace rlogin and
 rsh, and to provide secure encrypted communications between two
 untrusted hosts over an insecure network. X11 connections and
 arbitrary TCP/IP ports can also be forwarded over the secure channel.
 
 OpenSSH is OpenBSD's version of the last free version of SSH, bringing
 it up to date in terms of security and features, as well as removing
 all patented algorithms to separate libraries.
 
 This package includes the core files necessary for both the OpenSSH
 client and server. To make this package useful, you should also
 install openssh-clients, openssh-server, or both.
 
 %description clients
 OpenSSH is a free version of SSH (Secure SHell), a program for logging
 into and executing commands on a remote machine. This package includes
 the clients necessary to make encrypted connections to SSH servers.
 You'll also need to install the openssh package on OpenSSH clients.
 
 %description server
 OpenSSH is a free version of SSH (Secure SHell), a program for logging
 into and executing commands on a remote machine. This package contains
 the secure shell daemon (sshd). The sshd daemon allows SSH clients to
 securely connect to your SSH server. You also need to have the openssh
 package installed.
 
 %description askpass
 OpenSSH is a free version of SSH (Secure SHell), a program for logging
 into and executing commands on a remote machine. This package contains
 an X11 passphrase dialog for OpenSSH.
 
 %description askpass-gnome
 OpenSSH is a free version of SSH (Secure SHell), a program for logging
 into and executing commands on a remote machine. This package contains
 an X11 passphrase dialog for OpenSSH and the GNOME GUI desktop
 environment.
 
 %prep
 
 %if ! %{no_x11_askpass}
 %setup -q -a 1
 %else
 %setup -q
 %endif
 
 %build
 %if %{rescue}
 CFLAGS="$RPM_OPT_FLAGS -Os"; export CFLAGS
 %endif
 
 %configure \
 	--sysconfdir=%{_sysconfdir}/ssh \
 	--libexecdir=%{_libexecdir}/openssh \
 	--datadir=%{_datadir}/openssh \
 	--with-default-path=/usr/local/bin:/bin:/usr/bin \
 	--with-superuser-path=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin \
 	--with-privsep-path=%{_var}/empty/sshd \
 	--mandir=%{_mandir} \
 	--with-mantype=man \
 	--disable-strip \
 %if %{without_openssl}
 	--without-openssl \
 %endif
 %if %{scard}
 	--with-smartcard \
 %endif
 %if %{rescue}
 	--without-pam \
 %else
 	--with-pam \
 %endif
 %if %{kerberos5}
 	 --with-kerberos5=$K5DIR \
 %endif
 
 
 %if %{static_libcrypto}
 perl -pi -e "s|-lcrypto|%{_libdir}/libcrypto.a|g" Makefile
 %endif
 
 make
 
 %if ! %{no_x11_askpass}
 pushd x11-ssh-askpass-%{aversion}
 %configure --libexecdir=%{_libexecdir}/openssh
 xmkmf -a
 make
 popd
 %endif
 
 # Define a variable to toggle gnome1/gtk2 building.  This is necessary
 # because RPM doesn't handle nested %if statements.
 %if %{gtk2}
 	gtk2=yes
 %else
 	gtk2=no
 %endif
 
 %if ! %{no_gnome_askpass}
 pushd contrib
 if [ $gtk2 = yes ] ; then
 	make gnome-ssh-askpass2
 	mv gnome-ssh-askpass2 gnome-ssh-askpass
 else
 	make gnome-ssh-askpass1
 	mv gnome-ssh-askpass1 gnome-ssh-askpass
 fi
 popd
 %endif
 
 %install
 rm -rf $RPM_BUILD_ROOT
 mkdir -p -m755 $RPM_BUILD_ROOT%{_sysconfdir}/ssh
 mkdir -p -m755 $RPM_BUILD_ROOT%{_libexecdir}/openssh
 mkdir -p -m755 $RPM_BUILD_ROOT%{_var}/empty/sshd
 
 make install DESTDIR=$RPM_BUILD_ROOT
 
 install -d $RPM_BUILD_ROOT/etc/pam.d/
 install -d $RPM_BUILD_ROOT/etc/rc.d/init.d
 install -d $RPM_BUILD_ROOT%{_libexecdir}/openssh
 install -m644 contrib/redhat/sshd.pam  $RPM_BUILD_ROOT/etc/pam.d/sshd
 install -m755 contrib/redhat/sshd.init $RPM_BUILD_ROOT/etc/rc.d/init.d/sshd
 
 %if ! %{no_x11_askpass}
 install x11-ssh-askpass-%{aversion}/x11-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/x11-ssh-askpass
 ln -s x11-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/ssh-askpass
 %endif
 
 %if ! %{no_gnome_askpass}
 install contrib/gnome-ssh-askpass $RPM_BUILD_ROOT%{_libexecdir}/openssh/gnome-ssh-askpass
 %endif
 
 %if ! %{scard}
 	 rm -f $RPM_BUILD_ROOT/usr/share/openssh/Ssh.bin
 %endif
 
 %if ! %{no_gnome_askpass}
 install -m 755 -d $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
 install -m 755 contrib/redhat/gnome-ssh-askpass.csh $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
 install -m 755 contrib/redhat/gnome-ssh-askpass.sh $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
 %endif
 
 perl -pi -e "s|$RPM_BUILD_ROOT||g" $RPM_BUILD_ROOT%{_mandir}/man*/*
 
 %clean
 rm -rf $RPM_BUILD_ROOT
 
 %triggerun server -- ssh-server
 if [ "$1" != 0 -a -r /var/run/sshd.pid ] ; then
 	touch /var/run/sshd.restart
 fi
 
 %triggerun server -- openssh-server < 2.5.0p1
 # Count the number of HostKey and HostDsaKey statements we have.
 gawk	'BEGIN {IGNORECASE=1}
 	 /^hostkey/ || /^hostdsakey/ {sawhostkey = sawhostkey + 1}
 	 END {exit sawhostkey}' /etc/ssh/sshd_config
 # And if we only found one, we know the client was relying on the old default
 # behavior, which loaded the the SSH2 DSA host key when HostDsaKey wasn't
 # specified.  Now that HostKey is used for both SSH1 and SSH2 keys, specifying
 # one nullifies the default, which would have loaded both.
 if [ $? -eq 1 ] ; then
 	echo HostKey /etc/ssh/ssh_host_rsa_key >> /etc/ssh/sshd_config
 	echo HostKey /etc/ssh/ssh_host_dsa_key >> /etc/ssh/sshd_config
 fi
 
 %triggerpostun server -- ssh-server
 if [ "$1" != 0 ] ; then
 	/sbin/chkconfig --add sshd
 	if test -f /var/run/sshd.restart ; then
 		rm -f /var/run/sshd.restart
 		/sbin/service sshd start > /dev/null 2>&1 || :
 	fi
 fi
 
 %pre server
 %{_sbindir}/groupadd -r -g %{sshd_gid} sshd 2>/dev/null || :
 %{_sbindir}/useradd -d /var/empty/sshd -s /bin/false -u %{sshd_uid} \
 	-g sshd -M -r sshd 2>/dev/null || :
 
 %post server
 /sbin/chkconfig --add sshd
 
 %postun server
 /sbin/service sshd condrestart > /dev/null 2>&1 || :
 
 %preun server
 if [ "$1" = 0 ]
 then
 	/sbin/service sshd stop > /dev/null 2>&1 || :
 	/sbin/chkconfig --del sshd
 fi
 
 %files
 %defattr(-,root,root)
 %doc CREDITS ChangeLog INSTALL LICENCE OVERVIEW README* PROTOCOL* TODO
 %attr(0755,root,root) %{_bindir}/scp
 %attr(0644,root,root) %{_mandir}/man1/scp.1*
 %attr(0755,root,root) %dir %{_sysconfdir}/ssh
 %attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/moduli
 %if ! %{rescue}
 %attr(0755,root,root) %{_bindir}/ssh-keygen
 %attr(0644,root,root) %{_mandir}/man1/ssh-keygen.1*
 %attr(0755,root,root) %dir %{_libexecdir}/openssh
 %attr(4711,root,root) %{_libexecdir}/openssh/ssh-keysign
 %attr(0755,root,root) %{_libexecdir}/openssh/ssh-pkcs11-helper
 %attr(0755,root,root) %{_libexecdir}/openssh/ssh-sk-helper
 %attr(0644,root,root) %{_mandir}/man8/ssh-keysign.8*
 %attr(0644,root,root) %{_mandir}/man8/ssh-pkcs11-helper.8*
 %attr(0644,root,root) %{_mandir}/man8/ssh-sk-helper.8*
 %endif
 %if %{scard}
 %attr(0755,root,root) %dir %{_datadir}/openssh
 %attr(0644,root,root) %{_datadir}/openssh/Ssh.bin
 %endif
 
 %files clients
 %defattr(-,root,root)
 %attr(0755,root,root) %{_bindir}/ssh
 %attr(0644,root,root) %{_mandir}/man1/ssh.1*
 %attr(0644,root,root) %{_mandir}/man5/ssh_config.5*
 %attr(0644,root,root) %config(noreplace) %{_sysconfdir}/ssh/ssh_config
 %if ! %{rescue}
 %attr(2755,root,nobody) %{_bindir}/ssh-agent
 %attr(0755,root,root) %{_bindir}/ssh-add
 %attr(0755,root,root) %{_bindir}/ssh-keyscan
 %attr(0755,root,root) %{_bindir}/sftp
 %attr(0644,root,root) %{_mandir}/man1/ssh-agent.1*
 %attr(0644,root,root) %{_mandir}/man1/ssh-add.1*
 %attr(0644,root,root) %{_mandir}/man1/ssh-keyscan.1*
 %attr(0644,root,root) %{_mandir}/man1/sftp.1*
 %endif
 
 %if ! %{rescue}
 %files server
 %defattr(-,root,root)
 %dir %attr(0111,root,root) %{_var}/empty/sshd
 %attr(0755,root,root) %{_sbindir}/sshd
 %attr(0755,root,root) %{_libexecdir}/openssh/sftp-server
 %attr(0644,root,root) %{_mandir}/man8/sshd.8*
 %attr(0644,root,root) %{_mandir}/man5/moduli.5*
 %attr(0644,root,root) %{_mandir}/man5/sshd_config.5*
 %attr(0644,root,root) %{_mandir}/man8/sftp-server.8*
 %attr(0755,root,root) %dir %{_sysconfdir}/ssh
 %attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/sshd_config
 %attr(0600,root,root) %config(noreplace) /etc/pam.d/sshd
 %attr(0755,root,root) %config /etc/rc.d/init.d/sshd
 %endif
 
 %if ! %{no_x11_askpass}
 %files askpass
 %defattr(-,root,root)
 %doc x11-ssh-askpass-%{aversion}/README
 %doc x11-ssh-askpass-%{aversion}/ChangeLog
 %doc x11-ssh-askpass-%{aversion}/SshAskpass*.ad
 %{_libexecdir}/openssh/ssh-askpass
 %attr(0755,root,root) %{_libexecdir}/openssh/x11-ssh-askpass
 %endif
 
 %if ! %{no_gnome_askpass}
 %files askpass-gnome
 %defattr(-,root,root)
 %attr(0755,root,root) %config %{_sysconfdir}/profile.d/gnome-ssh-askpass.*
 %attr(0755,root,root) %{_libexecdir}/openssh/gnome-ssh-askpass
 %endif
 
 %changelog
 * Mon Oct 16 2023 Fabio Pedretti <pedretti.fabio@gmail.com>
 - Remove reference of dropped sshd.pam.old file
 - Update openssl-devel dependency to require >= 1.1.1
 - Build with --without-openssl elsewhere
 
 * Thu Oct 28 2021 Damien Miller <djm@mindrot.org>
 - Remove remaining traces of --with-md5-passwords
 
 * Mon Jul 20 2020 Damien Miller <djm@mindrot.org>
 - Add ssh-sk-helper and corresponding manual page.
 
 * Sat Feb 10 2018 Darren Tucker <dtucker@dtucker.net>
 - Update openssl-devel dependency to match current requirements.
 - Handle Fedora >=6 openssl 1.0 compat libs.
 - Remove SSH1 from description.
 - Don't strip binaries at build time so that debuginfo package can be
   created.
 
 * Sun Nov 16 2014 Nico Kadel-Garcia <nakdel@gmail.com>
 - Add '--mandir' and '--with-mantype' for RHEL 5 compatibility
 - Add 'dist' option to 'ver' so package names reflect OS at build time
 - Always include x11-ssh-askpass tarball in SRPM
 - Add openssh-x11-aspass BuildRequires for libXT-devel, imake, gtk2-devel
 - Discard 'K5DIR' reporting, not usable inside 'mock' for RHEL 5 compatibility
 - Discard obsolete '--with-rsh' configure option
 - Update openssl-devel dependency to 0.9.8f, as found in autoconf
 
 * Wed Jul 14 2010 Tim Rice <tim@multitalents.net>
 - test for skip_x11_askpass (line 77) should have been for no_x11_askpass
 
 * Mon Jun 2 2003 Damien Miller <djm@mindrot.org>
 - Remove noip6 option. This may be controlled at run-time in client config
   file using new AddressFamily directive
 
 * Mon May 12 2003 Damien Miller <djm@mindrot.org>
 - Don't install profile.d scripts when not building with GNOME/GTK askpass
   (patch from bet@rahul.net)
 
 * Tue Oct 01 2002 Damien Miller <djm@mindrot.org>
 - Install ssh-agent setgid nobody to prevent ptrace() key theft attacks
 
 * Mon Sep 30 2002 Damien Miller <djm@mindrot.org>
 - Use contrib/ Makefile for building askpass programs
 
 * Fri Jun 21 2002 Damien Miller <djm@mindrot.org>
 - Merge in spec changes from seba@iq.pl (Sebastian Pachuta)
 - Add new {ssh,sshd}_config.5 manpages
 - Add new ssh-keysign program and remove setuid from ssh client
 
 * Fri May 10 2002 Damien Miller <djm@mindrot.org>
 - Merge in spec changes from RedHat, reorgansie a little
 - Add Privsep user, group and directory
 
 * Thu Mar  7 2002 Nalin Dahyabhai <nalin@redhat.com> 3.1p1-2
 - bump and grind (through the build system)
 
 * Thu Mar  7 2002 Nalin Dahyabhai <nalin@redhat.com> 3.1p1-1
 - require sharutils for building (mindrot #137)
 - require db1-devel only when building for 6.x (#55105), which probably won't
   work anyway (3.1 requires OpenSSL 0.9.6 to build), but what the heck
 - require pam-devel by file (not by package name) again
 - add Markus's patch to compile with OpenSSL 0.9.5a (from
   http://bugzilla.mindrot.org/show_bug.cgi?id=141) and apply it if we're
   building for 6.x
 
 * Thu Mar  7 2002 Nalin Dahyabhai <nalin@redhat.com> 3.1p1-0
 - update to 3.1p1
 
 * Tue Mar  5 2002 Nalin Dahyabhai <nalin@redhat.com> SNAP-20020305
 - update to SNAP-20020305
 - drop debug patch, fixed upstream
 
 * Wed Feb 20 2002 Nalin Dahyabhai <nalin@redhat.com> SNAP-20020220
 - update to SNAP-20020220 for testing purposes (you've been warned, if there's
   anything to be warned about, gss patches won't apply, I don't mind)
 
 * Wed Feb 13 2002 Nalin Dahyabhai <nalin@redhat.com> 3.0.2p1-3
 - add patches from Simon Wilkinson and Nicolas Williams for GSSAPI key
   exchange, authentication, and named key support
 
 * Wed Jan 23 2002 Nalin Dahyabhai <nalin@redhat.com> 3.0.2p1-2
 - remove dependency on db1-devel, which has just been swallowed up whole
   by gnome-libs-devel
 
 * Sat Dec 29 2001 Nalin Dahyabhai <nalin@redhat.com>
 - adjust build dependencies so that build6x actually works right (fix
   from Hugo van der Kooij)
 
 * Tue Dec  4 2001 Nalin Dahyabhai <nalin@redhat.com> 3.0.2p1-1
 - update to 3.0.2p1
 
 * Fri Nov 16 2001 Nalin Dahyabhai <nalin@redhat.com> 3.0.1p1-1
 - update to 3.0.1p1
 
 * Tue Nov 13 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to current CVS (not for use in distribution)
 
 * Thu Nov  8 2001 Nalin Dahyabhai <nalin@redhat.com> 3.0p1-1
 - merge some of Damien Miller <djm@mindrot.org> changes from the upstream
   3.0p1 spec file and init script
 
 * Wed Nov  7 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to 3.0p1
 - update to x11-ssh-askpass 1.2.4.1
 - change build dependency on a file from pam-devel to the pam-devel package
 - replace primes with moduli
 
 * Thu Sep 27 2001 Nalin Dahyabhai <nalin@redhat.com> 2.9p2-9
 - incorporate fix from Markus Friedl's advisory for IP-based authorization bugs
 
 * Thu Sep 13 2001 Bernhard Rosenkraenzer <bero@redhat.com> 2.9p2-8
 - Merge changes to rescue build from current sysadmin survival cd
 
 * Thu Sep  6 2001 Nalin Dahyabhai <nalin@redhat.com> 2.9p2-7
 - fix scp's server's reporting of file sizes, and build with the proper
   preprocessor define to get large-file capable open(), stat(), etc.
   (sftp has been doing this correctly all along) (#51827)
 - configure without --with-ipv4-default on RHL 7.x and newer (#45987,#52247)
 - pull cvs patch to fix support for /etc/nologin for non-PAM logins (#47298)
 - mark profile.d scriptlets as config files (#42337)
 - refer to Jason Stone's mail for zsh workaround for exit-hanging quasi-bug
 - change a couple of log() statements to debug() statements (#50751)
 - pull cvs patch to add -t flag to sshd (#28611)
 - clear fd_sets correctly (one bit per FD, not one byte per FD) (#43221)
 
 * Mon Aug 20 2001 Nalin Dahyabhai <nalin@redhat.com> 2.9p2-6
 - add db1-devel as a BuildPrerequisite (noted by Hans Ecke)
 
 * Thu Aug 16 2001 Nalin Dahyabhai <nalin@redhat.com>
 - pull cvs patch to fix remote port forwarding with protocol 2
 
 * Thu Aug  9 2001 Nalin Dahyabhai <nalin@redhat.com>
 - pull cvs patch to add session initialization to no-pty sessions
 - pull cvs patch to not cut off challengeresponse auth needlessly
 - refuse to do X11 forwarding if xauth isn't there, handy if you enable
   it by default on a system that doesn't have X installed (#49263)
 
 * Wed Aug  8 2001 Nalin Dahyabhai <nalin@redhat.com>
 - don't apply patches to code we don't intend to build (spotted by Matt Galgoci)
 
 * Mon Aug  6 2001 Nalin Dahyabhai <nalin@redhat.com>
 - pass OPTIONS correctly to initlog (#50151)
 
 * Wed Jul 25 2001 Nalin Dahyabhai <nalin@redhat.com>
 - switch to x11-ssh-askpass 1.2.2
 
 * Wed Jul 11 2001 Nalin Dahyabhai <nalin@redhat.com>
 - rebuild in new environment
 
 * Mon Jun 25 2001 Nalin Dahyabhai <nalin@redhat.com>
 - disable the gssapi patch
 
 * Mon Jun 18 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to 2.9p2
 - refresh to a new version of the gssapi patch
 
 * Thu Jun  7 2001 Nalin Dahyabhai <nalin@redhat.com>
 - change Copyright: BSD to License: BSD
 - add Markus Friedl's unverified patch for the cookie file deletion problem
   so that we can verify it
 - drop patch to check if xauth is present (was folded into cookie patch)
 - don't apply gssapi patches for the errata candidate
 - clear supplemental groups list at startup
 
 * Fri May 25 2001 Nalin Dahyabhai <nalin@redhat.com>
 - fix an error parsing the new default sshd_config
 - add a fix from Markus Friedl (via openssh-unix-dev) for ssh-keygen not
   dealing with comments right
 
 * Thu May 24 2001 Nalin Dahyabhai <nalin@redhat.com>
 - add in Simon Wilkinson's GSSAPI patch to give it some testing in-house,
   to be removed before the next beta cycle because it's a big departure
   from the upstream version
 
 * Thu May  3 2001 Nalin Dahyabhai <nalin@redhat.com>
 - finish marking strings in the init script for translation
 - modify init script to source /etc/sysconfig/sshd and pass $OPTIONS to sshd
   at startup (change merged from openssh.com init script, originally by
   Pekka Savola)
 - refuse to do X11 forwarding if xauth isn't there, handy if you enable
   it by default on a system that doesn't have X installed
 
 * Wed May  2 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to 2.9
 - drop various patches that came from or went upstream or to or from CVS
 
 * Wed Apr 18 2001 Nalin Dahyabhai <nalin@redhat.com>
 - only require initscripts 5.00 on 6.2 (reported by Peter Bieringer)
 
 * Sun Apr  8 2001 Preston Brown <pbrown@redhat.com>
 - remove explicit openssl requirement, fixes builddistro issue
 - make initscript stop() function wait until sshd really dead to avoid
   races in condrestart
 
 * Mon Apr  2 2001 Nalin Dahyabhai <nalin@redhat.com>
 - mention that challengereponse supports PAM, so disabling password doesn't
   limit users to pubkey and rsa auth (#34378)
 - bypass the daemon() function in the init script and call initlog directly,
   because daemon() won't start a daemon it detects is already running (like
   open connections)
 - require the version of openssl we had when we were built
 
 * Fri Mar 23 2001 Nalin Dahyabhai <nalin@redhat.com>
 - make do_pam_setcred() smart enough to know when to establish creds and
   when to reinitialize them
 - add in a couple of other fixes from Damien for inclusion in the errata
 
 * Thu Mar 22 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to 2.5.2p2
 - call setcred() again after initgroups, because the "creds" could actually
   be group memberships
 
 * Tue Mar 20 2001 Nalin Dahyabhai <nalin@redhat.com>
 - update to 2.5.2p1 (includes endianness fixes in the rijndael implementation)
 - don't enable challenge-response by default until we find a way to not
   have too many userauth requests (we may make up to six pubkey and up to
   three password attempts as it is)
 - remove build dependency on rsh to match openssh.com's packages more closely
 
 * Sat Mar  3 2001 Nalin Dahyabhai <nalin@redhat.com>
 - remove dependency on openssl -- would need to be too precise
 
 * Fri Mar  2 2001 Nalin Dahyabhai <nalin@redhat.com>
 - rebuild in new environment
 
 * Mon Feb 26 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Revert the patch to move pam_open_session.
 - Init script and spec file changes from Pekka Savola. (#28750)
 - Patch sftp to recognize '-o protocol' arguments. (#29540)
 
 * Thu Feb 22 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Chuck the closing patch.
 - Add a trigger to add host keys for protocol 2 to the config file, now that
   configuration file syntax requires us to specify it with HostKey if we
   specify any other HostKey values, which we do.
 
 * Tue Feb 20 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Redo patch to move pam_open_session after the server setuid()s to the user.
 - Rework the nopam patch to use be picked up by autoconf.
 
 * Mon Feb 19 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Update for 2.5.1p1.
 - Add init script mods from Pekka Savola.
 - Tweak the init script to match the CVS contrib script more closely.
 - Redo patch to ssh-add to try to adding both identity and id_dsa to also try
   adding id_rsa.
 
 * Fri Feb 16 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Update for 2.5.0p1.
 - Use $RPM_OPT_FLAGS instead of -O when building gnome-ssh-askpass
 - Resync with parts of Damien Miller's openssh.spec from CVS, including
   update of x11 askpass to 1.2.0.
 - Only require openssl (don't prereq) because we generate keys in the init
   script now.
 
 * Tue Feb 13 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Don't open a PAM session until we've forked and become the user (#25690).
 - Apply Andrew Bartlett's patch for letting pam_authenticate() know which
   host the user is attempting a login from.
 - Resync with parts of Damien Miller's openssh.spec from CVS.
 - Don't expose KbdInt responses in debug messages (from CVS).
 - Detect and handle errors in rsa_{public,private}_decrypt (from CVS).
 
 * Wed Feb  7 2001 Trond Eivind Glomsrxd <teg@redhat.com>
 - i18n-tweak to initscript.
 
 * Tue Jan 23 2001 Nalin Dahyabhai <nalin@redhat.com>
 - More gettextizing.
 - Close all files after going into daemon mode (needs more testing).
 - Extract patch from CVS to handle auth banners (in the client).
 - Extract patch from CVS to handle compat weirdness.
 
 * Fri Jan 19 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Finish with the gettextizing.
 
 * Thu Jan 18 2001 Nalin Dahyabhai <nalin@redhat.com>
 - Fix a bug in auth2-pam.c (#23877)
 - Gettextize the init script.
 
 * Wed Dec 20 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Incorporate a switch for using PAM configs for 6.x, just in case.
 
 * Tue Dec  5 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Incorporate Bero's changes for a build specifically for rescue CDs.
 
 * Wed Nov 29 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Don't treat pam_setcred() failure as fatal unless pam_authenticate() has
   succeeded, to allow public-key authentication after a failure with "none"
   authentication.  (#21268)
 
 * Tue Nov 28 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to x11-askpass 1.1.1. (#21301)
 - Don't second-guess fixpaths, which causes paths to get fixed twice. (#21290)
 
 * Mon Nov 27 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Merge multiple PAM text messages into subsequent prompts when possible when
   doing keyboard-interactive authentication.
 
 * Sun Nov 26 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Disable the built-in MD5 password support.  We're using PAM.
 - Take a crack at doing keyboard-interactive authentication with PAM, and
   enable use of it in the default client configuration so that the client
   will try it when the server disallows password authentication.
 - Build with debugging flags.  Build root policies strip all binaries anyway.
 
 * Tue Nov 21 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Use DESTDIR instead of %%makeinstall.
 - Remove /usr/X11R6/bin from the path-fixing patch.
 
 * Mon Nov 20 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Add the primes file from the latest snapshot to the main package (#20884).
 - Add the dev package to the prereq list (#19984).
 - Remove the default path and mimic login's behavior in the server itself.
 
 * Fri Nov 17 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Resync with conditional options in Damien Miller's .spec file for an errata.
 - Change libexecdir from %%{_libexecdir}/ssh to %%{_libexecdir}/openssh.
 
 * Tue Nov  7 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to OpenSSH 2.3.0p1.
 - Update to x11-askpass 1.1.0.
 - Enable keyboard-interactive authentication.
 
 * Mon Oct 30 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to ssh-askpass-x11 1.0.3.
 - Change authentication related messages to be private (#19966).
 
 * Tue Oct 10 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Patch ssh-keygen to be able to list signatures for DSA public key files
   it generates.
 
 * Thu Oct  5 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Add BuildRequires on /usr/include/security/pam_appl.h to be sure we always
   build PAM authentication in.
 - Try setting SSH_ASKPASS if gnome-ssh-askpass is installed.
 - Clean out no-longer-used patches.
 - Patch ssh-add to try to add both identity and id_dsa, and to error only
   when neither exists.
 
 * Mon Oct  2 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update x11-askpass to 1.0.2. (#17835)
 - Add BuildRequiress for /bin/login and /usr/bin/rsh so that configure will
   always find them in the right place. (#17909)
 - Set the default path to be the same as the one supplied by /bin/login, but
   add /usr/X11R6/bin. (#17909)
 - Try to handle obsoletion of ssh-server more cleanly.  Package names
   are different, but init script name isn't. (#17865)
 
 * Wed Sep  6 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 2.2.0p1. (#17835)
 - Tweak the init script to allow proper restarting. (#18023)
 
 * Wed Aug 23 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 20000823 snapshot.
 - Change subpackage requirements from %%{version} to %%{version}-%%{release}
 - Back out the pipe patch.
 
 * Mon Jul 17 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 2.1.1p4, which includes fixes for config file parsing problems.
 - Move the init script back.
 - Add Damien's quick fix for wackiness.
 
 * Wed Jul 12 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 2.1.1p3, which includes fixes for X11 forwarding and strtok().
 
 * Thu Jul  6 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Move condrestart to server postun.
 - Move key generation to init script.
 - Actually use the right patch for moving the key generation to the init script.
 - Clean up the init script a bit.
 
 * Wed Jul  5 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Fix X11 forwarding, from mail post by Chan Shih-Ping Richard.
 
 * Sun Jul  2 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 2.1.1p2.
 - Use of strtok() considered harmful.
 
 * Sat Jul  1 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Get the build root out of the man pages.
 
 * Thu Jun 29 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Add and use condrestart support in the init script.
 - Add newer initscripts as a prereq.
 
 * Tue Jun 27 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Build in new environment (release 2)
 - Move -clients subpackage to Applications/Internet group
 
 * Fri Jun  9 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Update to 2.2.1p1
 
 * Sat Jun  3 2000 Nalin Dahyabhai <nalin@redhat.com>
 - Patch to build with neither RSA nor RSAref.
 - Miscellaneous FHS-compliance tweaks.
 - Fix for possibly-compressed man pages.
 
 * Wed Mar 15 2000 Damien Miller <djm@ibs.com.au>
 - Updated for new location
 - Updated for new gnome-ssh-askpass build
 
 * Sun Dec 26 1999 Damien Miller <djm@mindrot.org>
 - Added Jim Knoble's <jmknoble@pobox.com> askpass
 
 * Mon Nov 15 1999 Damien Miller <djm@mindrot.org>
 - Split subpackages further based on patch from jim knoble <jmknoble@pobox.com>
 
 * Sat Nov 13 1999 Damien Miller <djm@mindrot.org>
 - Added 'Obsoletes' directives
 
 * Tue Nov 09 1999 Damien Miller <djm@ibs.com.au>
 - Use make install
 - Subpackages
 
 * Mon Nov 08 1999 Damien Miller <djm@ibs.com.au>
 - Added links for slogin
 - Fixed perms on manpages
 
 * Sat Oct 30 1999 Damien Miller <djm@ibs.com.au>
 - Renamed init script
 
 * Fri Oct 29 1999 Damien Miller <djm@ibs.com.au>
 - Back to old binary names
 
 * Thu Oct 28 1999 Damien Miller <djm@ibs.com.au>
 - Use autoconf
 - New binary names
 
 * Wed Oct 27 1999 Damien Miller <djm@ibs.com.au>
 - Initial RPMification, based on Jan "Yenya" Kasprzak's <kas@fi.muni.cz> spec.
diff --git a/contrib/suse/openssh.spec b/contrib/suse/openssh.spec
index b5082f0d5d8c..7dbe4db6edc5 100644
--- a/contrib/suse/openssh.spec
+++ b/contrib/suse/openssh.spec
@@ -1,245 +1,245 @@
 # Default values for additional components
 %define build_x11_askpass	1
 
 # Define the UID/GID to use for privilege separation
 %define sshd_gid	65
 %define sshd_uid	71
 
 # The version of x11-ssh-askpass to use
 %define xversion	1.2.4.1
 
 # Allow the ability to override defaults with -D skip_xxx=1
 %{?skip_x11_askpass:%define build_x11_askpass 0}
 
 Summary:	OpenSSH, a free Secure Shell (SSH) protocol implementation
 Name:		openssh
-Version:	9.6p1
+Version:	9.7p1
 URL:		https://www.openssh.com/
 Release:	1
 Source0:	openssh-%{version}.tar.gz
 Source1:	x11-ssh-askpass-%{xversion}.tar.gz
 License:	BSD
 Group:		Productivity/Networking/SSH
 BuildRoot:	%{_tmppath}/openssh-%{version}-buildroot
 PreReq:		openssl
 Obsoletes:	ssh
 Provides:	ssh
 #
 # (Build[ing] Prereq[uisites] only work for RPM 2.95 and newer.)
 # building prerequisites -- stuff for
 #   OpenSSL (openssl-devel),
 #   and Gnome (glibdev, gtkdev, and gnlibsd)
 #
 BuildPrereq:	openssl
 BuildPrereq:	zlib-devel
 #BuildPrereq:	glibdev
 #BuildPrereq:	gtkdev
 #BuildPrereq:	gnlibsd
 
 %package	askpass
 Summary:	A passphrase dialog for OpenSSH and the X window System.
 Group:		Productivity/Networking/SSH
 Requires:	openssh = %{version}
 Obsoletes:	ssh-extras
 Provides:	openssh:${_libdir}/ssh/ssh-askpass
 
 %if %{build_x11_askpass}
 BuildPrereq:	XFree86-devel
 %endif
 
 %description
 Ssh (Secure Shell) is a program for logging into a remote machine and for
 executing commands in a remote machine.  It is intended to replace
 rlogin and rsh, and provide secure encrypted communications between
 two untrusted hosts over an insecure network.  X11 connections and
 arbitrary TCP/IP ports can also be forwarded over the secure channel.
 
 OpenSSH is OpenBSD's rework of the last free version of SSH, bringing it
 up to date in terms of security and features, as well as removing all
 patented algorithms to separate libraries (OpenSSL).
 
 This package includes all files necessary for both the OpenSSH
 client and server.
 
 %description askpass
 Ssh (Secure Shell) is a program for logging into a remote machine and for
 executing commands in a remote machine.  It is intended to replace
 rlogin and rsh, and provide secure encrypted communications between
 two untrusted hosts over an insecure network.  X11 connections and
 arbitrary TCP/IP ports can also be forwarded over the secure channel.
 
 OpenSSH is OpenBSD's rework of the last free version of SSH, bringing it
 up to date in terms of security and features, as well as removing all
 patented algorithms to separate libraries (OpenSSL).
 
 This package contains an X Window System passphrase dialog for OpenSSH.
 
 %changelog
 * Mon Jul 20 2020 Damien Miller <djm@mindrto.org>
 - Add ssh-sk-helper and corresponding manual page.
 * Wed Oct 26 2005 Iain Morgan <imorgan@nas.nasa.gov>
 - Removed accidental inclusion of --without-zlib-version-check
 * Tue Oct 25 2005 Iain Morgan <imorgan@nas.nasa.gov>
 - Overhaul to deal with newer versions of SuSE and OpenSSH
 * Mon Jun 12 2000 Damien Miller <djm@mindrot.org>
 - Glob manpages to catch compressed files
 * Wed Mar 15 2000 Damien Miller <djm@ibs.com.au>
 - Updated for new location
 - Updated for new gnome-ssh-askpass build
 * Sun Dec 26 1999 Chris Saia <csaia@wtower.com>
 - Made symlink to gnome-ssh-askpass called ssh-askpass
 * Wed Nov 24 1999 Chris Saia <csaia@wtower.com>
 - Removed patches that included /etc/pam.d/sshd, /sbin/init.d/rc.sshd, and
   /var/adm/fillup-templates/rc.config.sshd, since Damien merged these into
   his released tarfile
 - Changed permissions on ssh_config in the install procedure to 644 from 600
   even though it was correct in the %files section and thus right in the RPMs
 - Postinstall script for the server now only prints "Generating SSH host
   key..." if we need to actually do this, in order to eliminate a confusing
   message if an SSH host key is already in place
 - Marked all manual pages as %doc(umentation)
 * Mon Nov 22 1999 Chris Saia <csaia@wtower.com>
 - Added flag to configure daemon with TCP Wrappers support
 - Added building prerequisites (works in RPM 3.0 and newer)
 * Thu Nov 18 1999 Chris Saia <csaia@wtower.com>
 - Made this package correct for SuSE.
 - Changed instances of pam_pwdb.so to pam_unix.so, since it works more properly
   with SuSE, and lib_pwdb.so isn't installed by default.
 * Mon Nov 15 1999 Damien Miller <djm@mindrot.org>
 - Split subpackages further based on patch from jim knoble <jmknoble@pobox.com>
 * Sat Nov 13 1999 Damien Miller <djm@mindrot.org>
 - Added 'Obsoletes' directives
 * Tue Nov 09 1999 Damien Miller <djm@ibs.com.au>
 - Use make install
 - Subpackages
 * Mon Nov 08 1999 Damien Miller <djm@ibs.com.au>
 - Added links for slogin
 - Fixed perms on manpages
 * Sat Oct 30 1999 Damien Miller <djm@ibs.com.au>
 - Renamed init script
 * Fri Oct 29 1999 Damien Miller <djm@ibs.com.au>
 - Back to old binary names
 * Thu Oct 28 1999 Damien Miller <djm@ibs.com.au>
 - Use autoconf
 - New binary names
 * Wed Oct 27 1999 Damien Miller <djm@ibs.com.au>
 - Initial RPMification, based on Jan "Yenya" Kasprzak's <kas@fi.muni.cz> spec.
 
 %prep
 
 %if %{build_x11_askpass}
 %setup -q -a 1
 %else
 %setup -q
 %endif
 
 %build
 CFLAGS="$RPM_OPT_FLAGS" \
 %configure	--prefix=/usr \
 		--sysconfdir=%{_sysconfdir}/ssh \
 		--mandir=%{_mandir} \
 		--with-privsep-path=/var/lib/empty \
 		--with-pam \
 		--libexecdir=%{_libdir}/ssh
 make
 
 %if %{build_x11_askpass}
 cd x11-ssh-askpass-%{xversion}
 %configure	--mandir=/usr/X11R6/man \
 		--libexecdir=%{_libdir}/ssh
 xmkmf -a
 make
 cd ..
 %endif
 
 %install
 rm -rf $RPM_BUILD_ROOT
 make install DESTDIR=$RPM_BUILD_ROOT/
 install -d $RPM_BUILD_ROOT/etc/pam.d/
 install -d $RPM_BUILD_ROOT/etc/init.d/
 install -d $RPM_BUILD_ROOT/var/adm/fillup-templates
 install -m644 contrib/sshd.pam.generic $RPM_BUILD_ROOT/etc/pam.d/sshd
 install -m744 contrib/suse/rc.sshd $RPM_BUILD_ROOT/etc/init.d/sshd
 install -m744 contrib/suse/sysconfig.ssh \
    $RPM_BUILD_ROOT/var/adm/fillup-templates
 
 %if %{build_x11_askpass}
 cd x11-ssh-askpass-%{xversion}
 make install install.man BINDIR=%{_libdir}/ssh DESTDIR=$RPM_BUILD_ROOT/
 rm -f $RPM_BUILD_ROOT/usr/share/Ssh.bin
 %endif
 
 %clean
 rm -rf $RPM_BUILD_ROOT
 
 %pre
 /usr/sbin/groupadd -g %{sshd_gid} -o -r sshd 2> /dev/null || :
 /usr/sbin/useradd -r -o -g sshd -u %{sshd_uid} -s /bin/false -c "SSH Privilege Separation User" -d /var/lib/sshd sshd 2> /dev/null || :
 
 %post
 /usr/bin/ssh-keygen -A
 %{fillup_and_insserv -n -y ssh sshd}
 %run_permissions
 
 %verifyscript
 %verify_permissions -e /etc/ssh/sshd_config -e /etc/ssh/ssh_config -e /usr/bin/ssh
 
 %preun
 %stop_on_removal sshd
 
 %postun
 %restart_on_update sshd
 %{insserv_cleanup}
 
 %files
 %defattr(-,root,root)
 %doc ChangeLog OVERVIEW README* PROTOCOL*
 %doc TODO CREDITS LICENCE
 %attr(0755,root,root) %dir %{_sysconfdir}/ssh
 %attr(0644,root,root) %config(noreplace) %{_sysconfdir}/ssh/ssh_config
 %attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/sshd_config
 %attr(0600,root,root) %config(noreplace) %{_sysconfdir}/ssh/moduli
 %attr(0644,root,root) %config(noreplace) /etc/pam.d/sshd
 %attr(0755,root,root) %config /etc/init.d/sshd
 %attr(0755,root,root) %{_bindir}/ssh-keygen
 %attr(0755,root,root) %{_bindir}/scp
 %attr(0755,root,root) %{_bindir}/ssh
 %attr(0755,root,root) %{_bindir}/ssh-agent
 %attr(0755,root,root) %{_bindir}/ssh-add
 %attr(0755,root,root) %{_bindir}/ssh-keyscan
 %attr(0755,root,root) %{_bindir}/sftp
 %attr(0755,root,root) %{_sbindir}/sshd
 %attr(0755,root,root) %dir %{_libdir}/ssh
 %attr(0755,root,root) %{_libdir}/ssh/sftp-server
 %attr(4711,root,root) %{_libdir}/ssh/ssh-keysign
 %attr(0755,root,root) %{_libdir}/ssh/ssh-pkcs11-helper
 %attr(0755,root,root) %{_libdir}/ssh/ssh-sk-helper
 %attr(0644,root,root) %doc %{_mandir}/man1/scp.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/sftp.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/ssh.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/ssh-add.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/ssh-agent.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/ssh-keygen.1*
 %attr(0644,root,root) %doc %{_mandir}/man1/ssh-keyscan.1*
 %attr(0644,root,root) %doc %{_mandir}/man5/moduli.5*
 %attr(0644,root,root) %doc %{_mandir}/man5/ssh_config.5*
 %attr(0644,root,root) %doc %{_mandir}/man5/sshd_config.5*
 %attr(0644,root,root) %doc %{_mandir}/man8/sftp-server.8*
 %attr(0644,root,root) %doc %{_mandir}/man8/ssh-keysign.8*
 %attr(0644,root,root) %doc %{_mandir}/man8/ssh-pkcs11-helper.8*
 %attr(0644,root,root) %doc %{_mandir}/man8/ssh-sk-helper.8*
 %attr(0644,root,root) %doc %{_mandir}/man8/sshd.8*
 %attr(0644,root,root) /var/adm/fillup-templates/sysconfig.ssh
 
 %if %{build_x11_askpass}
 %files askpass
 %defattr(-,root,root)
 %doc x11-ssh-askpass-%{xversion}/README
 %doc x11-ssh-askpass-%{xversion}/ChangeLog
 %doc x11-ssh-askpass-%{xversion}/SshAskpass*.ad
 %attr(0755,root,root) %{_libdir}/ssh/ssh-askpass
 %attr(0755,root,root) %{_libdir}/ssh/x11-ssh-askpass
 %attr(0644,root,root) %doc /usr/X11R6/man/man1/ssh-askpass.1x*
 %attr(0644,root,root) %doc /usr/X11R6/man/man1/x11-ssh-askpass.1x*
 %attr(0644,root,root) %config /usr/X11R6/lib/X11/app-defaults/SshAskpass
 %endif
diff --git a/gss-genr.c b/gss-genr.c
index 2cd695e543c4..aa34b71c5558 100644
--- a/gss-genr.c
+++ b/gss-genr.c
@@ -1,303 +1,303 @@
-/* $OpenBSD: gss-genr.c,v 1.28 2021/01/27 10:05:28 djm Exp $ */
+/* $OpenBSD: gss-genr.c,v 1.29 2024/02/01 02:37:33 djm Exp $ */
 
 /*
  * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #ifdef GSSAPI
 
 #include <sys/types.h>
 
 #include <limits.h>
 #include <stdarg.h>
 #include <string.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 #include "xmalloc.h"
 #include "ssherr.h"
 #include "sshbuf.h"
 #include "log.h"
 #include "ssh2.h"
 
 #include "ssh-gss.h"
 
 /* sshbuf_get for gss_buffer_desc */
 int
 ssh_gssapi_get_buffer_desc(struct sshbuf *b, gss_buffer_desc *g)
 {
 	int r;
 	u_char *p;
 	size_t len;
 
 	if ((r = sshbuf_get_string(b, &p, &len)) != 0)
 		return r;
 	g->value = p;
 	g->length = len;
 	return 0;
 }
 
 /* Check that the OID in a data stream matches that in the context */
 int
 ssh_gssapi_check_oid(Gssctxt *ctx, void *data, size_t len)
 {
 	return (ctx != NULL && ctx->oid != GSS_C_NO_OID &&
 	    ctx->oid->length == len &&
 	    memcmp(ctx->oid->elements, data, len) == 0);
 }
 
 /* Set the contexts OID from a data stream */
 void
 ssh_gssapi_set_oid_data(Gssctxt *ctx, void *data, size_t len)
 {
 	if (ctx->oid != GSS_C_NO_OID) {
 		free(ctx->oid->elements);
 		free(ctx->oid);
 	}
 	ctx->oid = xcalloc(1, sizeof(gss_OID_desc));
 	ctx->oid->length = len;
 	ctx->oid->elements = xmalloc(len);
 	memcpy(ctx->oid->elements, data, len);
 }
 
 /* Set the contexts OID */
 void
 ssh_gssapi_set_oid(Gssctxt *ctx, gss_OID oid)
 {
 	ssh_gssapi_set_oid_data(ctx, oid->elements, oid->length);
 }
 
 /* All this effort to report an error ... */
 void
 ssh_gssapi_error(Gssctxt *ctxt)
 {
 	char *s;
 
 	s = ssh_gssapi_last_error(ctxt, NULL, NULL);
 	debug("%s", s);
 	free(s);
 }
 
 char *
 ssh_gssapi_last_error(Gssctxt *ctxt, OM_uint32 *major_status,
     OM_uint32 *minor_status)
 {
 	OM_uint32 lmin;
 	gss_buffer_desc msg = GSS_C_EMPTY_BUFFER;
 	OM_uint32 ctx;
 	struct sshbuf *b;
 	char *ret;
 	int r;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 
 	if (major_status != NULL)
 		*major_status = ctxt->major;
 	if (minor_status != NULL)
 		*minor_status = ctxt->minor;
 
 	ctx = 0;
 	/* The GSSAPI error */
 	do {
 		gss_display_status(&lmin, ctxt->major,
 		    GSS_C_GSS_CODE, ctxt->oid, &ctx, &msg);
 
 		if ((r = sshbuf_put(b, msg.value, msg.length)) != 0 ||
 		    (r = sshbuf_put_u8(b, '\n')) != 0)
 			fatal_fr(r, "assemble GSS_CODE");
 
 		gss_release_buffer(&lmin, &msg);
 	} while (ctx != 0);
 
 	/* The mechanism specific error */
 	do {
 		gss_display_status(&lmin, ctxt->minor,
 		    GSS_C_MECH_CODE, ctxt->oid, &ctx, &msg);
 
 		if ((r = sshbuf_put(b, msg.value, msg.length)) != 0 ||
 		    (r = sshbuf_put_u8(b, '\n')) != 0)
 			fatal_fr(r, "assemble MECH_CODE");
 
 		gss_release_buffer(&lmin, &msg);
 	} while (ctx != 0);
 
 	if ((r = sshbuf_put_u8(b, '\n')) != 0)
 		fatal_fr(r, "assemble newline");
 	ret = xstrdup((const char *)sshbuf_ptr(b));
 	sshbuf_free(b);
 	return (ret);
 }
 
 /*
  * Initialise our GSSAPI context. We use this opaque structure to contain all
  * of the data which both the client and server need to persist across
  * {accept,init}_sec_context calls, so that when we do it from the userauth
  * stuff life is a little easier
  */
 void
 ssh_gssapi_build_ctx(Gssctxt **ctx)
 {
 	*ctx = xcalloc(1, sizeof (Gssctxt));
 	(*ctx)->context = GSS_C_NO_CONTEXT;
 	(*ctx)->name = GSS_C_NO_NAME;
 	(*ctx)->oid = GSS_C_NO_OID;
 	(*ctx)->creds = GSS_C_NO_CREDENTIAL;
 	(*ctx)->client = GSS_C_NO_NAME;
 	(*ctx)->client_creds = GSS_C_NO_CREDENTIAL;
 }
 
 /* Delete our context, providing it has been built correctly */
 void
 ssh_gssapi_delete_ctx(Gssctxt **ctx)
 {
 	OM_uint32 ms;
 
 	if ((*ctx) == NULL)
 		return;
 	if ((*ctx)->context != GSS_C_NO_CONTEXT)
 		gss_delete_sec_context(&ms, &(*ctx)->context, GSS_C_NO_BUFFER);
 	if ((*ctx)->name != GSS_C_NO_NAME)
 		gss_release_name(&ms, &(*ctx)->name);
 	if ((*ctx)->oid != GSS_C_NO_OID) {
 		free((*ctx)->oid->elements);
 		free((*ctx)->oid);
 		(*ctx)->oid = GSS_C_NO_OID;
 	}
 	if ((*ctx)->creds != GSS_C_NO_CREDENTIAL)
 		gss_release_cred(&ms, &(*ctx)->creds);
 	if ((*ctx)->client != GSS_C_NO_NAME)
 		gss_release_name(&ms, &(*ctx)->client);
 	if ((*ctx)->client_creds != GSS_C_NO_CREDENTIAL)
 		gss_release_cred(&ms, &(*ctx)->client_creds);
 
 	free(*ctx);
 	*ctx = NULL;
 }
 
 /*
  * Wrapper to init_sec_context
  * Requires that the context contains:
  *	oid
  *	server name (from ssh_gssapi_import_name)
  */
 OM_uint32
 ssh_gssapi_init_ctx(Gssctxt *ctx, int deleg_creds, gss_buffer_desc *recv_tok,
     gss_buffer_desc* send_tok, OM_uint32 *flags)
 {
 	int deleg_flag = 0;
 
 	if (deleg_creds) {
 		deleg_flag = GSS_C_DELEG_FLAG;
 		debug("Delegating credentials");
 	}
 
 	ctx->major = gss_init_sec_context(&ctx->minor,
 	    GSS_C_NO_CREDENTIAL, &ctx->context, ctx->name, ctx->oid,
 	    GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | deleg_flag,
 	    0, NULL, recv_tok, NULL, send_tok, flags, NULL);
 
 	if (GSS_ERROR(ctx->major))
 		ssh_gssapi_error(ctx);
 
 	return (ctx->major);
 }
 
 /* Create a service name for the given host */
 OM_uint32
 ssh_gssapi_import_name(Gssctxt *ctx, const char *host)
 {
 	gss_buffer_desc gssbuf;
 	char *val;
 
 	xasprintf(&val, "host@%s", host);
 	gssbuf.value = val;
 	gssbuf.length = strlen(gssbuf.value);
 
 	if ((ctx->major = gss_import_name(&ctx->minor,
 	    &gssbuf, GSS_C_NT_HOSTBASED_SERVICE, &ctx->name)))
 		ssh_gssapi_error(ctx);
 
 	free(gssbuf.value);
 	return (ctx->major);
 }
 
 OM_uint32
 ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_t buffer, gss_buffer_t hash)
 {
 	if ((ctx->major = gss_get_mic(&ctx->minor, ctx->context,
 	    GSS_C_QOP_DEFAULT, buffer, hash)))
 		ssh_gssapi_error(ctx);
 
 	return (ctx->major);
 }
 
 void
 ssh_gssapi_buildmic(struct sshbuf *b, const char *user, const char *service,
     const char *context, const struct sshbuf *session_id)
 {
 	int r;
 
 	sshbuf_reset(b);
 	if ((r = sshbuf_put_stringb(b, session_id)) != 0 ||
 	    (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshbuf_put_cstring(b, user)) != 0 ||
 	    (r = sshbuf_put_cstring(b, service)) != 0 ||
 	    (r = sshbuf_put_cstring(b, context)) != 0)
 		fatal_fr(r, "assemble buildmic");
 }
 
 int
 ssh_gssapi_check_mechanism(Gssctxt **ctx, gss_OID oid, const char *host)
 {
 	gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
 	OM_uint32 major, minor;
 	gss_OID_desc spnego_oid = {6, (void *)"\x2B\x06\x01\x05\x05\x02"};
 
 	/* RFC 4462 says we MUST NOT do SPNEGO */
-	if (oid->length == spnego_oid.length && 
+	if (oid->length == spnego_oid.length &&
 	    (memcmp(oid->elements, spnego_oid.elements, oid->length) == 0))
 		return 0; /* false */
 
 	ssh_gssapi_build_ctx(ctx);
 	ssh_gssapi_set_oid(*ctx, oid);
 	major = ssh_gssapi_import_name(*ctx, host);
 	if (!GSS_ERROR(major)) {
-		major = ssh_gssapi_init_ctx(*ctx, 0, GSS_C_NO_BUFFER, &token, 
+		major = ssh_gssapi_init_ctx(*ctx, 0, GSS_C_NO_BUFFER, &token,
 		    NULL);
 		gss_release_buffer(&minor, &token);
 		if ((*ctx)->context != GSS_C_NO_CONTEXT)
 			gss_delete_sec_context(&minor, &(*ctx)->context,
 			    GSS_C_NO_BUFFER);
 	}
 
-	if (GSS_ERROR(major)) 
+	if (GSS_ERROR(major))
 		ssh_gssapi_delete_ctx(ctx);
 
 	return (!GSS_ERROR(major));
 }
 
 #endif /* GSSAPI */
diff --git a/kex.c b/kex.c
index cbb2af5965c0..8a0f165135fd 100644
--- a/kex.c
+++ b/kex.c
@@ -1,1667 +1,1690 @@
-/* $OpenBSD: kex.c,v 1.184 2023/12/18 14:45:49 djm Exp $ */
+/* $OpenBSD: kex.c,v 1.185 2024/01/08 00:34:33 djm Exp $ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <errno.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 
 #ifdef WITH_OPENSSL
 #include <openssl/crypto.h>
 #include <openssl/dh.h>
 #endif
 
 #include "ssh.h"
 #include "ssh2.h"
 #include "atomicio.h"
 #include "version.h"
 #include "packet.h"
 #include "compat.h"
 #include "cipher.h"
 #include "sshkey.h"
 #include "kex.h"
 #include "log.h"
 #include "mac.h"
 #include "match.h"
 #include "misc.h"
 #include "dispatch.h"
 #include "monitor.h"
 #include "myproposal.h"
 
 #include "ssherr.h"
 #include "sshbuf.h"
 #include "digest.h"
 #include "xmalloc.h"
 
 /* prototype */
 static int kex_choose_conf(struct ssh *, uint32_t seq);
 static int kex_input_newkeys(int, u_int32_t, struct ssh *);
 
 static const char * const proposal_names[PROPOSAL_MAX] = {
 	"KEX algorithms",
 	"host key algorithms",
 	"ciphers ctos",
 	"ciphers stoc",
 	"MACs ctos",
 	"MACs stoc",
 	"compression ctos",
 	"compression stoc",
 	"languages ctos",
 	"languages stoc",
 };
 
 struct kexalg {
 	char *name;
 	u_int type;
 	int ec_nid;
 	int hash_alg;
 };
 static const struct kexalg kexalgs[] = {
 #ifdef WITH_OPENSSL
 	{ KEX_DH1, KEX_DH_GRP1_SHA1, 0, SSH_DIGEST_SHA1 },
 	{ KEX_DH14_SHA1, KEX_DH_GRP14_SHA1, 0, SSH_DIGEST_SHA1 },
 	{ KEX_DH14_SHA256, KEX_DH_GRP14_SHA256, 0, SSH_DIGEST_SHA256 },
 	{ KEX_DH16_SHA512, KEX_DH_GRP16_SHA512, 0, SSH_DIGEST_SHA512 },
 	{ KEX_DH18_SHA512, KEX_DH_GRP18_SHA512, 0, SSH_DIGEST_SHA512 },
 	{ KEX_DHGEX_SHA1, KEX_DH_GEX_SHA1, 0, SSH_DIGEST_SHA1 },
 #ifdef HAVE_EVP_SHA256
 	{ KEX_DHGEX_SHA256, KEX_DH_GEX_SHA256, 0, SSH_DIGEST_SHA256 },
 #endif /* HAVE_EVP_SHA256 */
 #ifdef OPENSSL_HAS_ECC
 	{ KEX_ECDH_SHA2_NISTP256, KEX_ECDH_SHA2,
 	    NID_X9_62_prime256v1, SSH_DIGEST_SHA256 },
 	{ KEX_ECDH_SHA2_NISTP384, KEX_ECDH_SHA2, NID_secp384r1,
 	    SSH_DIGEST_SHA384 },
 # ifdef OPENSSL_HAS_NISTP521
 	{ KEX_ECDH_SHA2_NISTP521, KEX_ECDH_SHA2, NID_secp521r1,
 	    SSH_DIGEST_SHA512 },
 # endif /* OPENSSL_HAS_NISTP521 */
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 #if defined(HAVE_EVP_SHA256) || !defined(WITH_OPENSSL)
 	{ KEX_CURVE25519_SHA256, KEX_C25519_SHA256, 0, SSH_DIGEST_SHA256 },
 	{ KEX_CURVE25519_SHA256_OLD, KEX_C25519_SHA256, 0, SSH_DIGEST_SHA256 },
 #ifdef USE_SNTRUP761X25519
 	{ KEX_SNTRUP761X25519_SHA512, KEX_KEM_SNTRUP761X25519_SHA512, 0,
 	    SSH_DIGEST_SHA512 },
 #endif
 #endif /* HAVE_EVP_SHA256 || !WITH_OPENSSL */
 	{ NULL, 0, -1, -1},
 };
 
 char *
 kex_alg_list(char sep)
 {
 	char *ret = NULL, *tmp;
 	size_t nlen, rlen = 0;
 	const struct kexalg *k;
 
 	for (k = kexalgs; k->name != NULL; k++) {
 		if (ret != NULL)
 			ret[rlen++] = sep;
 		nlen = strlen(k->name);
 		if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) {
 			free(ret);
 			return NULL;
 		}
 		ret = tmp;
 		memcpy(ret + rlen, k->name, nlen + 1);
 		rlen += nlen;
 	}
 	return ret;
 }
 
 static const struct kexalg *
 kex_alg_by_name(const char *name)
 {
 	const struct kexalg *k;
 
 	for (k = kexalgs; k->name != NULL; k++) {
 		if (strcmp(k->name, name) == 0)
 			return k;
 	}
 	return NULL;
 }
 
 /* Validate KEX method name list */
 int
 kex_names_valid(const char *names)
 {
 	char *s, *cp, *p;
 
 	if (names == NULL || strcmp(names, "") == 0)
 		return 0;
 	if ((s = cp = strdup(names)) == NULL)
 		return 0;
 	for ((p = strsep(&cp, ",")); p && *p != '\0';
 	    (p = strsep(&cp, ","))) {
 		if (kex_alg_by_name(p) == NULL) {
 			error("Unsupported KEX algorithm \"%.100s\"", p);
 			free(s);
 			return 0;
 		}
 	}
 	debug3("kex names ok: [%s]", names);
 	free(s);
 	return 1;
 }
 
 /* returns non-zero if proposal contains any algorithm from algs */
 static int
 has_any_alg(const char *proposal, const char *algs)
 {
 	char *cp;
 
 	if ((cp = match_list(proposal, algs, NULL)) == NULL)
 		return 0;
 	free(cp);
 	return 1;
 }
 
 /*
  * Concatenate algorithm names, avoiding duplicates in the process.
  * Caller must free returned string.
  */
 char *
 kex_names_cat(const char *a, const char *b)
 {
 	char *ret = NULL, *tmp = NULL, *cp, *p;
 	size_t len;
 
 	if (a == NULL || *a == '\0')
 		return strdup(b);
 	if (b == NULL || *b == '\0')
 		return strdup(a);
 	if (strlen(b) > 1024*1024)
 		return NULL;
 	len = strlen(a) + strlen(b) + 2;
 	if ((tmp = cp = strdup(b)) == NULL ||
 	    (ret = calloc(1, len)) == NULL) {
 		free(tmp);
 		return NULL;
 	}
 	strlcpy(ret, a, len);
 	for ((p = strsep(&cp, ",")); p && *p != '\0'; (p = strsep(&cp, ","))) {
 		if (has_any_alg(ret, p))
 			continue; /* Algorithm already present */
 		if (strlcat(ret, ",", len) >= len ||
 		    strlcat(ret, p, len) >= len) {
 			free(tmp);
 			free(ret);
 			return NULL; /* Shouldn't happen */
 		}
 	}
 	free(tmp);
 	return ret;
 }
 
 /*
  * Assemble a list of algorithms from a default list and a string from a
  * configuration file. The user-provided string may begin with '+' to
  * indicate that it should be appended to the default, '-' that the
  * specified names should be removed, or '^' that they should be placed
  * at the head.
  */
 int
 kex_assemble_names(char **listp, const char *def, const char *all)
 {
 	char *cp, *tmp, *patterns;
 	char *list = NULL, *ret = NULL, *matching = NULL, *opatterns = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (listp == NULL || def == NULL || all == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	if (*listp == NULL || **listp == '\0') {
 		if ((*listp = strdup(def)) == NULL)
 			return SSH_ERR_ALLOC_FAIL;
 		return 0;
 	}
 
 	list = *listp;
 	*listp = NULL;
 	if (*list == '+') {
 		/* Append names to default list */
 		if ((tmp = kex_names_cat(def, list + 1)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto fail;
 		}
 		free(list);
 		list = tmp;
 	} else if (*list == '-') {
 		/* Remove names from default list */
 		if ((*listp = match_filter_denylist(def, list + 1)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto fail;
 		}
 		free(list);
 		/* filtering has already been done */
 		return 0;
 	} else if (*list == '^') {
 		/* Place names at head of default list */
 		if ((tmp = kex_names_cat(list + 1, def)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto fail;
 		}
 		free(list);
 		list = tmp;
 	} else {
 		/* Explicit list, overrides default - just use "list" as is */
 	}
 
 	/*
 	 * The supplied names may be a pattern-list. For the -list case,
 	 * the patterns are applied above. For the +list and explicit list
 	 * cases we need to do it now.
 	 */
 	ret = NULL;
 	if ((patterns = opatterns = strdup(list)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto fail;
 	}
 	/* Apply positive (i.e. non-negated) patterns from the list */
 	while ((cp = strsep(&patterns, ",")) != NULL) {
 		if (*cp == '!') {
 			/* negated matches are not supported here */
 			r = SSH_ERR_INVALID_ARGUMENT;
 			goto fail;
 		}
 		free(matching);
 		if ((matching = match_filter_allowlist(all, cp)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto fail;
 		}
 		if ((tmp = kex_names_cat(ret, matching)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto fail;
 		}
 		free(ret);
 		ret = tmp;
 	}
 	if (ret == NULL || *ret == '\0') {
 		/* An empty name-list is an error */
 		/* XXX better error code? */
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto fail;
 	}
 
 	/* success */
 	*listp = ret;
 	ret = NULL;
 	r = 0;
 
  fail:
 	free(matching);
 	free(opatterns);
 	free(list);
 	free(ret);
 	return r;
 }
 
 /*
  * Fill out a proposal array with dynamically allocated values, which may
  * be modified as required for compatibility reasons.
  * Any of the options may be NULL, in which case the default is used.
  * Array contents must be freed by calling kex_proposal_free_entries.
  */
 void
 kex_proposal_populate_entries(struct ssh *ssh, char *prop[PROPOSAL_MAX],
     const char *kexalgos, const char *ciphers, const char *macs,
     const char *comp, const char *hkalgs)
 {
 	const char *defpropserver[PROPOSAL_MAX] = { KEX_SERVER };
 	const char *defpropclient[PROPOSAL_MAX] = { KEX_CLIENT };
 	const char **defprop = ssh->kex->server ? defpropserver : defpropclient;
 	u_int i;
 	char *cp;
 
 	if (prop == NULL)
 		fatal_f("proposal missing");
 
 	/* Append EXT_INFO signalling to KexAlgorithms */
 	if (kexalgos == NULL)
 		kexalgos = defprop[PROPOSAL_KEX_ALGS];
 	if ((cp = kex_names_cat(kexalgos, ssh->kex->server ?
 	    "ext-info-s,kex-strict-s-v00@openssh.com" :
 	    "ext-info-c,kex-strict-c-v00@openssh.com")) == NULL)
 		fatal_f("kex_names_cat");
 
 	for (i = 0; i < PROPOSAL_MAX; i++) {
 		switch(i) {
 		case PROPOSAL_KEX_ALGS:
 			prop[i] = compat_kex_proposal(ssh, cp);
 			break;
 		case PROPOSAL_ENC_ALGS_CTOS:
 		case PROPOSAL_ENC_ALGS_STOC:
 			prop[i] = xstrdup(ciphers ? ciphers : defprop[i]);
 			break;
 		case PROPOSAL_MAC_ALGS_CTOS:
 		case PROPOSAL_MAC_ALGS_STOC:
 			prop[i]  = xstrdup(macs ? macs : defprop[i]);
 			break;
 		case PROPOSAL_COMP_ALGS_CTOS:
 		case PROPOSAL_COMP_ALGS_STOC:
 			prop[i] = xstrdup(comp ? comp : defprop[i]);
 			break;
 		case PROPOSAL_SERVER_HOST_KEY_ALGS:
 			prop[i] = xstrdup(hkalgs ? hkalgs : defprop[i]);
 			break;
 		default:
 			prop[i] = xstrdup(defprop[i]);
 		}
 	}
 	free(cp);
 }
 
 void
 kex_proposal_free_entries(char *prop[PROPOSAL_MAX])
 {
 	u_int i;
 
 	for (i = 0; i < PROPOSAL_MAX; i++)
 		free(prop[i]);
 }
 
 /* put algorithm proposal into buffer */
 int
 kex_prop2buf(struct sshbuf *b, char *proposal[PROPOSAL_MAX])
 {
 	u_int i;
 	int r;
 
 	sshbuf_reset(b);
 
 	/*
 	 * add a dummy cookie, the cookie will be overwritten by
 	 * kex_send_kexinit(), each time a kexinit is set
 	 */
 	for (i = 0; i < KEX_COOKIE_LEN; i++) {
 		if ((r = sshbuf_put_u8(b, 0)) != 0)
 			return r;
 	}
 	for (i = 0; i < PROPOSAL_MAX; i++) {
 		if ((r = sshbuf_put_cstring(b, proposal[i])) != 0)
 			return r;
 	}
 	if ((r = sshbuf_put_u8(b, 0)) != 0 ||	/* first_kex_packet_follows */
 	    (r = sshbuf_put_u32(b, 0)) != 0)	/* uint32 reserved */
 		return r;
 	return 0;
 }
 
 /* parse buffer and return algorithm proposal */
 int
 kex_buf2prop(struct sshbuf *raw, int *first_kex_follows, char ***propp)
 {
 	struct sshbuf *b = NULL;
 	u_char v;
 	u_int i;
 	char **proposal = NULL;
 	int r;
 
 	*propp = NULL;
 	if ((proposal = calloc(PROPOSAL_MAX, sizeof(char *))) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((b = sshbuf_fromb(raw)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = sshbuf_consume(b, KEX_COOKIE_LEN)) != 0) { /* skip cookie */
 		error_fr(r, "consume cookie");
 		goto out;
 	}
 	/* extract kex init proposal strings */
 	for (i = 0; i < PROPOSAL_MAX; i++) {
 		if ((r = sshbuf_get_cstring(b, &(proposal[i]), NULL)) != 0) {
 			error_fr(r, "parse proposal %u", i);
 			goto out;
 		}
 		debug2("%s: %s", proposal_names[i], proposal[i]);
 	}
 	/* first kex follows / reserved */
 	if ((r = sshbuf_get_u8(b, &v)) != 0 ||	/* first_kex_follows */
 	    (r = sshbuf_get_u32(b, &i)) != 0) {	/* reserved */
 		error_fr(r, "parse");
 		goto out;
 	}
 	if (first_kex_follows != NULL)
 		*first_kex_follows = v;
 	debug2("first_kex_follows %d ", v);
 	debug2("reserved %u ", i);
 	r = 0;
 	*propp = proposal;
  out:
 	if (r != 0 && proposal != NULL)
 		kex_prop_free(proposal);
 	sshbuf_free(b);
 	return r;
 }
 
 void
 kex_prop_free(char **proposal)
 {
 	u_int i;
 
 	if (proposal == NULL)
 		return;
 	for (i = 0; i < PROPOSAL_MAX; i++)
 		free(proposal[i]);
 	free(proposal);
 }
 
 int
 kex_protocol_error(int type, u_int32_t seq, struct ssh *ssh)
 {
 	int r;
 
 	/* If in strict mode, any unexpected message is an error */
 	if ((ssh->kex->flags & KEX_INITIAL) && ssh->kex->kex_strict) {
 		ssh_packet_disconnect(ssh, "strict KEX violation: "
 		    "unexpected packet type %u (seqnr %u)", type, seq);
 	}
 	error_f("type %u seq %u", type, seq);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_UNIMPLEMENTED)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, seq)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		return r;
 	return 0;
 }
 
 static void
 kex_reset_dispatch(struct ssh *ssh)
 {
 	ssh_dispatch_range(ssh, SSH2_MSG_TRANSPORT_MIN,
 	    SSH2_MSG_TRANSPORT_MAX, &kex_protocol_error);
 }
 
 void
 kex_set_server_sig_algs(struct ssh *ssh, const char *allowed_algs)
 {
 	char *alg, *oalgs, *algs, *sigalgs;
 	const char *sigalg;
 
 	/*
 	 * NB. allowed algorithms may contain certificate algorithms that
 	 * map to a specific plain signature type, e.g.
 	 * rsa-sha2-512-cert-v01@openssh.com => rsa-sha2-512
 	 * We need to be careful here to match these, retain the mapping
 	 * and only add each signature algorithm once.
 	 */
 	if ((sigalgs = sshkey_alg_list(0, 1, 1, ',')) == NULL)
 		fatal_f("sshkey_alg_list failed");
 	oalgs = algs = xstrdup(allowed_algs);
 	free(ssh->kex->server_sig_algs);
 	ssh->kex->server_sig_algs = NULL;
 	for ((alg = strsep(&algs, ",")); alg != NULL && *alg != '\0';
 	    (alg = strsep(&algs, ","))) {
 		if ((sigalg = sshkey_sigalg_by_name(alg)) == NULL)
 			continue;
 		if (!has_any_alg(sigalg, sigalgs))
 			continue;
 		/* Don't add an algorithm twice. */
 		if (ssh->kex->server_sig_algs != NULL &&
 		    has_any_alg(sigalg, ssh->kex->server_sig_algs))
 			continue;
 		xextendf(&ssh->kex->server_sig_algs, ",", "%s", sigalg);
 	}
 	free(oalgs);
 	free(sigalgs);
 	if (ssh->kex->server_sig_algs == NULL)
 		ssh->kex->server_sig_algs = xstrdup("");
 }
 
 static int
 kex_compose_ext_info_server(struct ssh *ssh, struct sshbuf *m)
 {
 	int r;
 
 	if (ssh->kex->server_sig_algs == NULL &&
 	    (ssh->kex->server_sig_algs = sshkey_alg_list(0, 1, 1, ',')) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshbuf_put_u32(m, 3)) != 0 ||
 	    (r = sshbuf_put_cstring(m, "server-sig-algs")) != 0 ||
 	    (r = sshbuf_put_cstring(m, ssh->kex->server_sig_algs)) != 0 ||
 	    (r = sshbuf_put_cstring(m,
 	    "publickey-hostbound@openssh.com")) != 0 ||
 	    (r = sshbuf_put_cstring(m, "0")) != 0 ||
 	    (r = sshbuf_put_cstring(m, "ping@openssh.com")) != 0 ||
 	    (r = sshbuf_put_cstring(m, "0")) != 0) {
 		error_fr(r, "compose");
 		return r;
 	}
 	return 0;
 }
 
 static int
 kex_compose_ext_info_client(struct ssh *ssh, struct sshbuf *m)
 {
 	int r;
 
 	if ((r = sshbuf_put_u32(m, 1)) != 0 ||
 	    (r = sshbuf_put_cstring(m, "ext-info-in-auth@openssh.com")) != 0 ||
 	    (r = sshbuf_put_cstring(m, "0")) != 0) {
 		error_fr(r, "compose");
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	return r;
 }
 
 static int
 kex_maybe_send_ext_info(struct ssh *ssh)
 {
 	int r;
 	struct sshbuf *m = NULL;
 
 	if ((ssh->kex->flags & KEX_INITIAL) == 0)
 		return 0;
 	if (!ssh->kex->ext_info_c && !ssh->kex->ext_info_s)
 		return 0;
 
 	/* Compose EXT_INFO packet. */
 	if ((m = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if (ssh->kex->ext_info_c &&
 	    (r = kex_compose_ext_info_server(ssh, m)) != 0)
 		goto fail;
 	if (ssh->kex->ext_info_s &&
 	    (r = kex_compose_ext_info_client(ssh, m)) != 0)
 		goto fail;
 
 	/* Send the actual KEX_INFO packet */
 	debug("Sending SSH2_MSG_EXT_INFO");
 	if ((r = sshpkt_start(ssh, SSH2_MSG_EXT_INFO)) != 0 ||
 	    (r = sshpkt_putb(ssh, m)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0) {
 		error_f("send EXT_INFO");
 		goto fail;
 	}
 
 	r = 0;
 
  fail:
 	sshbuf_free(m);
 	return r;
 }
 
 int
 kex_server_update_ext_info(struct ssh *ssh)
 {
 	int r;
 
 	if ((ssh->kex->flags & KEX_HAS_EXT_INFO_IN_AUTH) == 0)
 		return 0;
 
 	debug_f("Sending SSH2_MSG_EXT_INFO");
 	if ((r = sshpkt_start(ssh, SSH2_MSG_EXT_INFO)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, 1)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "server-sig-algs")) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, ssh->kex->server_sig_algs)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0) {
 		error_f("send EXT_INFO");
 		return r;
 	}
 	return 0;
 }
 
 int
 kex_send_newkeys(struct ssh *ssh)
 {
 	int r;
 
 	kex_reset_dispatch(ssh);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_NEWKEYS)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		return r;
 	debug("SSH2_MSG_NEWKEYS sent");
 	ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_input_newkeys);
 	if ((r = kex_maybe_send_ext_info(ssh)) != 0)
 		return r;
 	debug("expecting SSH2_MSG_NEWKEYS");
 	return 0;
 }
 
 /* Check whether an ext_info value contains the expected version string */
 static int
 kex_ext_info_check_ver(struct kex *kex, const char *name,
     const u_char *val, size_t len, const char *want_ver, u_int flag)
 {
 	if (memchr(val, '\0', len) != NULL) {
 		error("SSH2_MSG_EXT_INFO: %s value contains nul byte", name);
 		return SSH_ERR_INVALID_FORMAT;
 	}
 	debug_f("%s=<%s>", name, val);
 	if (strcmp(val, want_ver) == 0)
 		kex->flags |= flag;
 	else
 		debug_f("unsupported version of %s extension", name);
 	return 0;
 }
 
 static int
 kex_ext_info_client_parse(struct ssh *ssh, const char *name,
     const u_char *value, size_t vlen)
 {
 	int r;
 
 	/* NB. some messages are only accepted in the initial EXT_INFO */
 	if (strcmp(name, "server-sig-algs") == 0) {
 		/* Ensure no \0 lurking in value */
 		if (memchr(value, '\0', vlen) != NULL) {
 			error_f("nul byte in %s", name);
 			return SSH_ERR_INVALID_FORMAT;
 		}
 		debug_f("%s=<%s>", name, value);
 		free(ssh->kex->server_sig_algs);
 		ssh->kex->server_sig_algs = xstrdup((const char *)value);
 	} else if (ssh->kex->ext_info_received == 1 &&
 	    strcmp(name, "publickey-hostbound@openssh.com") == 0) {
 		if ((r = kex_ext_info_check_ver(ssh->kex, name, value, vlen,
 		    "0", KEX_HAS_PUBKEY_HOSTBOUND)) != 0) {
 			return r;
 		}
 	} else if (ssh->kex->ext_info_received == 1 &&
 	    strcmp(name, "ping@openssh.com") == 0) {
 		if ((r = kex_ext_info_check_ver(ssh->kex, name, value, vlen,
 		    "0", KEX_HAS_PING)) != 0) {
 			return r;
 		}
 	} else
 		debug_f("%s (unrecognised)", name);
 
 	return 0;
 }
 
 static int
 kex_ext_info_server_parse(struct ssh *ssh, const char *name,
     const u_char *value, size_t vlen)
 {
 	int r;
 
 	if (strcmp(name, "ext-info-in-auth@openssh.com") == 0) {
 		if ((r = kex_ext_info_check_ver(ssh->kex, name, value, vlen,
 		    "0", KEX_HAS_EXT_INFO_IN_AUTH)) != 0) {
 			return r;
 		}
 	} else
 		debug_f("%s (unrecognised)", name);
 	return 0;
 }
 
 int
 kex_input_ext_info(int type, u_int32_t seq, struct ssh *ssh)
 {
 	struct kex *kex = ssh->kex;
 	const int max_ext_info = kex->server ? 1 : 2;
 	u_int32_t i, ninfo;
 	char *name;
 	u_char *val;
 	size_t vlen;
 	int r;
 
 	debug("SSH2_MSG_EXT_INFO received");
 	if (++kex->ext_info_received > max_ext_info) {
 		error("too many SSH2_MSG_EXT_INFO messages sent by peer");
 		return dispatch_protocol_error(type, seq, ssh);
 	}
 	ssh_dispatch_set(ssh, SSH2_MSG_EXT_INFO, &kex_protocol_error);
 	if ((r = sshpkt_get_u32(ssh, &ninfo)) != 0)
 		return r;
 	if (ninfo >= 1024) {
 		error("SSH2_MSG_EXT_INFO with too many entries, expected "
 		    "<=1024, received %u", ninfo);
 		return dispatch_protocol_error(type, seq, ssh);
 	}
 	for (i = 0; i < ninfo; i++) {
 		if ((r = sshpkt_get_cstring(ssh, &name, NULL)) != 0)
 			return r;
 		if ((r = sshpkt_get_string(ssh, &val, &vlen)) != 0) {
 			free(name);
 			return r;
 		}
 		debug3_f("extension %s", name);
 		if (kex->server) {
 			if ((r = kex_ext_info_server_parse(ssh, name,
 			    val, vlen)) != 0)
 				return r;
 		} else {
 			if ((r = kex_ext_info_client_parse(ssh, name,
 			    val, vlen)) != 0)
 				return r;
 		}
 		free(name);
 		free(val);
 	}
 	return sshpkt_get_end(ssh);
 }
 
 static int
 kex_input_newkeys(int type, u_int32_t seq, struct ssh *ssh)
 {
 	struct kex *kex = ssh->kex;
-	int r;
+	int r, initial = (kex->flags & KEX_INITIAL) != 0;
+	char *cp, **prop;
 
 	debug("SSH2_MSG_NEWKEYS received");
-	if (kex->ext_info_c && (kex->flags & KEX_INITIAL) != 0)
+	if (kex->ext_info_c && initial)
 		ssh_dispatch_set(ssh, SSH2_MSG_EXT_INFO, &kex_input_ext_info);
 	ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_protocol_error);
 	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, &kex_input_kexinit);
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		return r;
 	if ((r = ssh_set_newkeys(ssh, MODE_IN)) != 0)
 		return r;
+	if (initial) {
+		/* Remove initial KEX signalling from proposal for rekeying */
+		if ((r = kex_buf2prop(kex->my, NULL, &prop)) != 0)
+			return r;
+		if ((cp = match_filter_denylist(prop[PROPOSAL_KEX_ALGS],
+		    kex->server ?
+		    "ext-info-s,kex-strict-s-v00@openssh.com" :
+		    "ext-info-c,kex-strict-c-v00@openssh.com")) == NULL) {
+			error_f("match_filter_denylist failed");
+			goto fail;
+		}
+		free(prop[PROPOSAL_KEX_ALGS]);
+		prop[PROPOSAL_KEX_ALGS] = cp;
+		if ((r = kex_prop2buf(ssh->kex->my, prop)) != 0) {
+			error_f("kex_prop2buf failed");
+ fail:
+			kex_proposal_free_entries(prop);
+			free(prop);
+			return SSH_ERR_INTERNAL_ERROR;
+		}
+		kex_proposal_free_entries(prop);
+		free(prop);
+	}
 	kex->done = 1;
 	kex->flags &= ~KEX_INITIAL;
 	sshbuf_reset(kex->peer);
-	/* sshbuf_reset(kex->my); */
 	kex->flags &= ~KEX_INIT_SENT;
 	free(kex->name);
 	kex->name = NULL;
 	return 0;
 }
 
 int
 kex_send_kexinit(struct ssh *ssh)
 {
 	u_char *cookie;
 	struct kex *kex = ssh->kex;
 	int r;
 
 	if (kex == NULL) {
 		error_f("no kex");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	if (kex->flags & KEX_INIT_SENT)
 		return 0;
 	kex->done = 0;
 
 	/* generate a random cookie */
 	if (sshbuf_len(kex->my) < KEX_COOKIE_LEN) {
 		error_f("bad kex length: %zu < %d",
 		    sshbuf_len(kex->my), KEX_COOKIE_LEN);
 		return SSH_ERR_INVALID_FORMAT;
 	}
 	if ((cookie = sshbuf_mutable_ptr(kex->my)) == NULL) {
 		error_f("buffer error");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	arc4random_buf(cookie, KEX_COOKIE_LEN);
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_KEXINIT)) != 0 ||
 	    (r = sshpkt_putb(ssh, kex->my)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0) {
 		error_fr(r, "compose reply");
 		return r;
 	}
 	debug("SSH2_MSG_KEXINIT sent");
 	kex->flags |= KEX_INIT_SENT;
 	return 0;
 }
 
 int
 kex_input_kexinit(int type, u_int32_t seq, struct ssh *ssh)
 {
 	struct kex *kex = ssh->kex;
 	const u_char *ptr;
 	u_int i;
 	size_t dlen;
 	int r;
 
 	debug("SSH2_MSG_KEXINIT received");
 	if (kex == NULL) {
 		error_f("no kex");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, &kex_protocol_error);
 	ptr = sshpkt_ptr(ssh, &dlen);
 	if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
 		return r;
 
 	/* discard packet */
 	for (i = 0; i < KEX_COOKIE_LEN; i++) {
 		if ((r = sshpkt_get_u8(ssh, NULL)) != 0) {
 			error_fr(r, "discard cookie");
 			return r;
 		}
 	}
 	for (i = 0; i < PROPOSAL_MAX; i++) {
 		if ((r = sshpkt_get_string(ssh, NULL, NULL)) != 0) {
 			error_fr(r, "discard proposal");
 			return r;
 		}
 	}
 	/*
 	 * XXX RFC4253 sec 7: "each side MAY guess" - currently no supported
 	 * KEX method has the server move first, but a server might be using
 	 * a custom method or one that we otherwise don't support. We should
 	 * be prepared to remember first_kex_follows here so we can eat a
 	 * packet later.
 	 * XXX2 - RFC4253 is kind of ambiguous on what first_kex_follows means
 	 * for cases where the server *doesn't* go first. I guess we should
 	 * ignore it when it is set for these cases, which is what we do now.
 	 */
 	if ((r = sshpkt_get_u8(ssh, NULL)) != 0 ||	/* first_kex_follows */
 	    (r = sshpkt_get_u32(ssh, NULL)) != 0 ||	/* reserved */
 	    (r = sshpkt_get_end(ssh)) != 0)
 			return r;
 
 	if (!(kex->flags & KEX_INIT_SENT))
 		if ((r = kex_send_kexinit(ssh)) != 0)
 			return r;
 	if ((r = kex_choose_conf(ssh, seq)) != 0)
 		return r;
 
 	if (kex->kex_type < KEX_MAX && kex->kex[kex->kex_type] != NULL)
 		return (kex->kex[kex->kex_type])(ssh);
 
 	error_f("unknown kex type %u", kex->kex_type);
 	return SSH_ERR_INTERNAL_ERROR;
 }
 
 struct kex *
 kex_new(void)
 {
 	struct kex *kex;
 
 	if ((kex = calloc(1, sizeof(*kex))) == NULL ||
 	    (kex->peer = sshbuf_new()) == NULL ||
 	    (kex->my = sshbuf_new()) == NULL ||
 	    (kex->client_version = sshbuf_new()) == NULL ||
 	    (kex->server_version = sshbuf_new()) == NULL ||
 	    (kex->session_id = sshbuf_new()) == NULL) {
 		kex_free(kex);
 		return NULL;
 	}
 	return kex;
 }
 
 void
 kex_free_newkeys(struct newkeys *newkeys)
 {
 	if (newkeys == NULL)
 		return;
 	if (newkeys->enc.key) {
 		explicit_bzero(newkeys->enc.key, newkeys->enc.key_len);
 		free(newkeys->enc.key);
 		newkeys->enc.key = NULL;
 	}
 	if (newkeys->enc.iv) {
 		explicit_bzero(newkeys->enc.iv, newkeys->enc.iv_len);
 		free(newkeys->enc.iv);
 		newkeys->enc.iv = NULL;
 	}
 	free(newkeys->enc.name);
 	explicit_bzero(&newkeys->enc, sizeof(newkeys->enc));
 	free(newkeys->comp.name);
 	explicit_bzero(&newkeys->comp, sizeof(newkeys->comp));
 	mac_clear(&newkeys->mac);
 	if (newkeys->mac.key) {
 		explicit_bzero(newkeys->mac.key, newkeys->mac.key_len);
 		free(newkeys->mac.key);
 		newkeys->mac.key = NULL;
 	}
 	free(newkeys->mac.name);
 	explicit_bzero(&newkeys->mac, sizeof(newkeys->mac));
 	freezero(newkeys, sizeof(*newkeys));
 }
 
 void
 kex_free(struct kex *kex)
 {
 	u_int mode;
 
 	if (kex == NULL)
 		return;
 
 #ifdef WITH_OPENSSL
 	DH_free(kex->dh);
 #ifdef OPENSSL_HAS_ECC
 	EC_KEY_free(kex->ec_client_key);
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		kex_free_newkeys(kex->newkeys[mode]);
 		kex->newkeys[mode] = NULL;
 	}
 	sshbuf_free(kex->peer);
 	sshbuf_free(kex->my);
 	sshbuf_free(kex->client_version);
 	sshbuf_free(kex->server_version);
 	sshbuf_free(kex->client_pub);
 	sshbuf_free(kex->session_id);
 	sshbuf_free(kex->initial_sig);
 	sshkey_free(kex->initial_hostkey);
 	free(kex->failed_choice);
 	free(kex->hostkey_alg);
 	free(kex->name);
 	free(kex);
 }
 
 int
 kex_ready(struct ssh *ssh, char *proposal[PROPOSAL_MAX])
 {
 	int r;
 
 	if ((r = kex_prop2buf(ssh->kex->my, proposal)) != 0)
 		return r;
 	ssh->kex->flags = KEX_INITIAL;
 	kex_reset_dispatch(ssh);
 	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, &kex_input_kexinit);
 	return 0;
 }
 
 int
 kex_setup(struct ssh *ssh, char *proposal[PROPOSAL_MAX])
 {
 	int r;
 
 	if ((r = kex_ready(ssh, proposal)) != 0)
 		return r;
 	if ((r = kex_send_kexinit(ssh)) != 0) {		/* we start */
 		kex_free(ssh->kex);
 		ssh->kex = NULL;
 		return r;
 	}
 	return 0;
 }
 
 /*
  * Request key re-exchange, returns 0 on success or a ssherr.h error
  * code otherwise. Must not be called if KEX is incomplete or in-progress.
  */
 int
 kex_start_rekex(struct ssh *ssh)
 {
 	if (ssh->kex == NULL) {
 		error_f("no kex");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	if (ssh->kex->done == 0) {
 		error_f("requested twice");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	ssh->kex->done = 0;
 	return kex_send_kexinit(ssh);
 }
 
 static int
 choose_enc(struct sshenc *enc, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
 	if (name == NULL)
 		return SSH_ERR_NO_CIPHER_ALG_MATCH;
 	if ((enc->cipher = cipher_by_name(name)) == NULL) {
 		error_f("unsupported cipher %s", name);
 		free(name);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	enc->name = name;
 	enc->enabled = 0;
 	enc->iv = NULL;
 	enc->iv_len = cipher_ivlen(enc->cipher);
 	enc->key = NULL;
 	enc->key_len = cipher_keylen(enc->cipher);
 	enc->block_size = cipher_blocksize(enc->cipher);
 	return 0;
 }
 
 static int
 choose_mac(struct ssh *ssh, struct sshmac *mac, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
 	if (name == NULL)
 		return SSH_ERR_NO_MAC_ALG_MATCH;
 	if (mac_setup(mac, name) < 0) {
 		error_f("unsupported MAC %s", name);
 		free(name);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	mac->name = name;
 	mac->key = NULL;
 	mac->enabled = 0;
 	return 0;
 }
 
 static int
 choose_comp(struct sshcomp *comp, char *client, char *server)
 {
 	char *name = match_list(client, server, NULL);
 
 	if (name == NULL)
 		return SSH_ERR_NO_COMPRESS_ALG_MATCH;
 #ifdef WITH_ZLIB
 	if (strcmp(name, "zlib@openssh.com") == 0) {
 		comp->type = COMP_DELAYED;
 	} else if (strcmp(name, "zlib") == 0) {
 		comp->type = COMP_ZLIB;
 	} else
 #endif	/* WITH_ZLIB */
 	if (strcmp(name, "none") == 0) {
 		comp->type = COMP_NONE;
 	} else {
 		error_f("unsupported compression scheme %s", name);
 		free(name);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	comp->name = name;
 	return 0;
 }
 
 static int
 choose_kex(struct kex *k, char *client, char *server)
 {
 	const struct kexalg *kexalg;
 
 	k->name = match_list(client, server, NULL);
 
 	debug("kex: algorithm: %s", k->name ? k->name : "(no match)");
 	if (k->name == NULL)
 		return SSH_ERR_NO_KEX_ALG_MATCH;
 	if ((kexalg = kex_alg_by_name(k->name)) == NULL) {
 		error_f("unsupported KEX method %s", k->name);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	k->kex_type = kexalg->type;
 	k->hash_alg = kexalg->hash_alg;
 	k->ec_nid = kexalg->ec_nid;
 	return 0;
 }
 
 static int
 choose_hostkeyalg(struct kex *k, char *client, char *server)
 {
 	free(k->hostkey_alg);
 	k->hostkey_alg = match_list(client, server, NULL);
 
 	debug("kex: host key algorithm: %s",
 	    k->hostkey_alg ? k->hostkey_alg : "(no match)");
 	if (k->hostkey_alg == NULL)
 		return SSH_ERR_NO_HOSTKEY_ALG_MATCH;
 	k->hostkey_type = sshkey_type_from_name(k->hostkey_alg);
 	if (k->hostkey_type == KEY_UNSPEC) {
 		error_f("unsupported hostkey algorithm %s", k->hostkey_alg);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	k->hostkey_nid = sshkey_ecdsa_nid_from_name(k->hostkey_alg);
 	return 0;
 }
 
 static int
 proposals_match(char *my[PROPOSAL_MAX], char *peer[PROPOSAL_MAX])
 {
 	static int check[] = {
 		PROPOSAL_KEX_ALGS, PROPOSAL_SERVER_HOST_KEY_ALGS, -1
 	};
 	int *idx;
 	char *p;
 
 	for (idx = &check[0]; *idx != -1; idx++) {
 		if ((p = strchr(my[*idx], ',')) != NULL)
 			*p = '\0';
 		if ((p = strchr(peer[*idx], ',')) != NULL)
 			*p = '\0';
 		if (strcmp(my[*idx], peer[*idx]) != 0) {
 			debug2("proposal mismatch: my %s peer %s",
 			    my[*idx], peer[*idx]);
 			return (0);
 		}
 	}
 	debug2("proposals match");
 	return (1);
 }
 
 static int
 kexalgs_contains(char **peer, const char *ext)
 {
 	return has_any_alg(peer[PROPOSAL_KEX_ALGS], ext);
 }
 
 static int
 kex_choose_conf(struct ssh *ssh, uint32_t seq)
 {
 	struct kex *kex = ssh->kex;
 	struct newkeys *newkeys;
 	char **my = NULL, **peer = NULL;
 	char **cprop, **sprop;
 	int nenc, nmac, ncomp;
 	u_int mode, ctos, need, dh_need, authlen;
 	int r, first_kex_follows;
 
 	debug2("local %s KEXINIT proposal", kex->server ? "server" : "client");
 	if ((r = kex_buf2prop(kex->my, NULL, &my)) != 0)
 		goto out;
 	debug2("peer %s KEXINIT proposal", kex->server ? "client" : "server");
 	if ((r = kex_buf2prop(kex->peer, &first_kex_follows, &peer)) != 0)
 		goto out;
 
 	if (kex->server) {
 		cprop=peer;
 		sprop=my;
 	} else {
 		cprop=my;
 		sprop=peer;
 	}
 
 	/* Check whether peer supports ext_info/kex_strict */
 	if ((kex->flags & KEX_INITIAL) != 0) {
 		if (kex->server) {
 			kex->ext_info_c = kexalgs_contains(peer, "ext-info-c");
 			kex->kex_strict = kexalgs_contains(peer,
 			    "kex-strict-c-v00@openssh.com");
 		} else {
 			kex->ext_info_s = kexalgs_contains(peer, "ext-info-s");
 			kex->kex_strict = kexalgs_contains(peer,
 			    "kex-strict-s-v00@openssh.com");
 		}
 		if (kex->kex_strict) {
 			debug3_f("will use strict KEX ordering");
 			if (seq != 0)
 				ssh_packet_disconnect(ssh,
 				    "strict KEX violation: "
 				    "KEXINIT was not the first packet");
 		}
 	}
 
 	/* Check whether client supports rsa-sha2 algorithms */
 	if (kex->server && (kex->flags & KEX_INITIAL)) {
 		if (has_any_alg(peer[PROPOSAL_SERVER_HOST_KEY_ALGS],
 		    "rsa-sha2-256,rsa-sha2-256-cert-v01@openssh.com"))
 			kex->flags |= KEX_RSA_SHA2_256_SUPPORTED;
 		if (has_any_alg(peer[PROPOSAL_SERVER_HOST_KEY_ALGS],
 		    "rsa-sha2-512,rsa-sha2-512-cert-v01@openssh.com"))
 			kex->flags |= KEX_RSA_SHA2_512_SUPPORTED;
 	}
 
 	/* Algorithm Negotiation */
 	if ((r = choose_kex(kex, cprop[PROPOSAL_KEX_ALGS],
 	    sprop[PROPOSAL_KEX_ALGS])) != 0) {
 		kex->failed_choice = peer[PROPOSAL_KEX_ALGS];
 		peer[PROPOSAL_KEX_ALGS] = NULL;
 		goto out;
 	}
 	if ((r = choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS],
 	    sprop[PROPOSAL_SERVER_HOST_KEY_ALGS])) != 0) {
 		kex->failed_choice = peer[PROPOSAL_SERVER_HOST_KEY_ALGS];
 		peer[PROPOSAL_SERVER_HOST_KEY_ALGS] = NULL;
 		goto out;
 	}
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		if ((newkeys = calloc(1, sizeof(*newkeys))) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		kex->newkeys[mode] = newkeys;
 		ctos = (!kex->server && mode == MODE_OUT) ||
 		    (kex->server && mode == MODE_IN);
 		nenc  = ctos ? PROPOSAL_ENC_ALGS_CTOS  : PROPOSAL_ENC_ALGS_STOC;
 		nmac  = ctos ? PROPOSAL_MAC_ALGS_CTOS  : PROPOSAL_MAC_ALGS_STOC;
 		ncomp = ctos ? PROPOSAL_COMP_ALGS_CTOS : PROPOSAL_COMP_ALGS_STOC;
 		if ((r = choose_enc(&newkeys->enc, cprop[nenc],
 		    sprop[nenc])) != 0) {
 			kex->failed_choice = peer[nenc];
 			peer[nenc] = NULL;
 			goto out;
 		}
 		authlen = cipher_authlen(newkeys->enc.cipher);
 		/* ignore mac for authenticated encryption */
 		if (authlen == 0 &&
 		    (r = choose_mac(ssh, &newkeys->mac, cprop[nmac],
 		    sprop[nmac])) != 0) {
 			kex->failed_choice = peer[nmac];
 			peer[nmac] = NULL;
 			goto out;
 		}
 		if ((r = choose_comp(&newkeys->comp, cprop[ncomp],
 		    sprop[ncomp])) != 0) {
 			kex->failed_choice = peer[ncomp];
 			peer[ncomp] = NULL;
 			goto out;
 		}
 		debug("kex: %s cipher: %s MAC: %s compression: %s",
 		    ctos ? "client->server" : "server->client",
 		    newkeys->enc.name,
 		    authlen == 0 ? newkeys->mac.name : "<implicit>",
 		    newkeys->comp.name);
 	}
 	need = dh_need = 0;
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		newkeys = kex->newkeys[mode];
 		need = MAXIMUM(need, newkeys->enc.key_len);
 		need = MAXIMUM(need, newkeys->enc.block_size);
 		need = MAXIMUM(need, newkeys->enc.iv_len);
 		need = MAXIMUM(need, newkeys->mac.key_len);
 		dh_need = MAXIMUM(dh_need, cipher_seclen(newkeys->enc.cipher));
 		dh_need = MAXIMUM(dh_need, newkeys->enc.block_size);
 		dh_need = MAXIMUM(dh_need, newkeys->enc.iv_len);
 		dh_need = MAXIMUM(dh_need, newkeys->mac.key_len);
 	}
 	/* XXX need runden? */
 	kex->we_need = need;
 	kex->dh_need = dh_need;
 
 	/* ignore the next message if the proposals do not match */
 	if (first_kex_follows && !proposals_match(my, peer))
 		ssh->dispatch_skip_packets = 1;
 	r = 0;
  out:
 	kex_prop_free(my);
 	kex_prop_free(peer);
 	return r;
 }
 
 static int
 derive_key(struct ssh *ssh, int id, u_int need, u_char *hash, u_int hashlen,
     const struct sshbuf *shared_secret, u_char **keyp)
 {
 	struct kex *kex = ssh->kex;
 	struct ssh_digest_ctx *hashctx = NULL;
 	char c = id;
 	u_int have;
 	size_t mdsz;
 	u_char *digest;
 	int r;
 
 	if ((mdsz = ssh_digest_bytes(kex->hash_alg)) == 0)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((digest = calloc(1, ROUNDUP(need, mdsz))) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/* K1 = HASH(K || H || "A" || session_id) */
 	if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL ||
 	    ssh_digest_update_buffer(hashctx, shared_secret) != 0 ||
 	    ssh_digest_update(hashctx, hash, hashlen) != 0 ||
 	    ssh_digest_update(hashctx, &c, 1) != 0 ||
 	    ssh_digest_update_buffer(hashctx, kex->session_id) != 0 ||
 	    ssh_digest_final(hashctx, digest, mdsz) != 0) {
 		r = SSH_ERR_LIBCRYPTO_ERROR;
 		error_f("KEX hash failed");
 		goto out;
 	}
 	ssh_digest_free(hashctx);
 	hashctx = NULL;
 
 	/*
 	 * expand key:
 	 * Kn = HASH(K || H || K1 || K2 || ... || Kn-1)
 	 * Key = K1 || K2 || ... || Kn
 	 */
 	for (have = mdsz; need > have; have += mdsz) {
 		if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL ||
 		    ssh_digest_update_buffer(hashctx, shared_secret) != 0 ||
 		    ssh_digest_update(hashctx, hash, hashlen) != 0 ||
 		    ssh_digest_update(hashctx, digest, have) != 0 ||
 		    ssh_digest_final(hashctx, digest + have, mdsz) != 0) {
 			error_f("KDF failed");
 			r = SSH_ERR_LIBCRYPTO_ERROR;
 			goto out;
 		}
 		ssh_digest_free(hashctx);
 		hashctx = NULL;
 	}
 #ifdef DEBUG_KEX
 	fprintf(stderr, "key '%c'== ", c);
 	dump_digest("key", digest, need);
 #endif
 	*keyp = digest;
 	digest = NULL;
 	r = 0;
  out:
 	free(digest);
 	ssh_digest_free(hashctx);
 	return r;
 }
 
 #define NKEYS	6
 int
 kex_derive_keys(struct ssh *ssh, u_char *hash, u_int hashlen,
     const struct sshbuf *shared_secret)
 {
 	struct kex *kex = ssh->kex;
 	u_char *keys[NKEYS];
 	u_int i, j, mode, ctos;
 	int r;
 
 	/* save initial hash as session id */
 	if ((kex->flags & KEX_INITIAL) != 0) {
 		if (sshbuf_len(kex->session_id) != 0) {
 			error_f("already have session ID at kex");
 			return SSH_ERR_INTERNAL_ERROR;
 		}
 		if ((r = sshbuf_put(kex->session_id, hash, hashlen)) != 0)
 			return r;
 	} else if (sshbuf_len(kex->session_id) == 0) {
 		error_f("no session ID in rekex");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	for (i = 0; i < NKEYS; i++) {
 		if ((r = derive_key(ssh, 'A'+i, kex->we_need, hash, hashlen,
 		    shared_secret, &keys[i])) != 0) {
 			for (j = 0; j < i; j++)
 				free(keys[j]);
 			return r;
 		}
 	}
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		ctos = (!kex->server && mode == MODE_OUT) ||
 		    (kex->server && mode == MODE_IN);
 		kex->newkeys[mode]->enc.iv  = keys[ctos ? 0 : 1];
 		kex->newkeys[mode]->enc.key = keys[ctos ? 2 : 3];
 		kex->newkeys[mode]->mac.key = keys[ctos ? 4 : 5];
 	}
 	return 0;
 }
 
 int
 kex_load_hostkey(struct ssh *ssh, struct sshkey **prvp, struct sshkey **pubp)
 {
 	struct kex *kex = ssh->kex;
 
 	*pubp = NULL;
 	*prvp = NULL;
 	if (kex->load_host_public_key == NULL ||
 	    kex->load_host_private_key == NULL) {
 		error_f("missing hostkey loader");
 		return SSH_ERR_INVALID_ARGUMENT;
 	}
 	*pubp = kex->load_host_public_key(kex->hostkey_type,
 	    kex->hostkey_nid, ssh);
 	*prvp = kex->load_host_private_key(kex->hostkey_type,
 	    kex->hostkey_nid, ssh);
 	if (*pubp == NULL)
 		return SSH_ERR_NO_HOSTKEY_LOADED;
 	return 0;
 }
 
 int
 kex_verify_host_key(struct ssh *ssh, struct sshkey *server_host_key)
 {
 	struct kex *kex = ssh->kex;
 
 	if (kex->verify_host_key == NULL) {
 		error_f("missing hostkey verifier");
 		return SSH_ERR_INVALID_ARGUMENT;
 	}
 	if (server_host_key->type != kex->hostkey_type ||
 	    (kex->hostkey_type == KEY_ECDSA &&
 	    server_host_key->ecdsa_nid != kex->hostkey_nid))
 		return SSH_ERR_KEY_TYPE_MISMATCH;
 	if (kex->verify_host_key(server_host_key, ssh) == -1)
 		return  SSH_ERR_SIGNATURE_INVALID;
 	return 0;
 }
 
 #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH)
 void
 dump_digest(const char *msg, const u_char *digest, int len)
 {
 	fprintf(stderr, "%s\n", msg);
 	sshbuf_dump_data(digest, len, stderr);
 }
 #endif
 
 /*
  * Send a plaintext error message to the peer, suffixed by \r\n.
  * Only used during banner exchange, and there only for the server.
  */
 static void
 send_error(struct ssh *ssh, char *msg)
 {
 	char *crnl = "\r\n";
 
 	if (!ssh->kex->server)
 		return;
 
 	if (atomicio(vwrite, ssh_packet_get_connection_out(ssh),
 	    msg, strlen(msg)) != strlen(msg) ||
 	    atomicio(vwrite, ssh_packet_get_connection_out(ssh),
 	    crnl, strlen(crnl)) != strlen(crnl))
 		error_f("write: %.100s", strerror(errno));
 }
 
 /*
  * Sends our identification string and waits for the peer's. Will block for
  * up to timeout_ms (or indefinitely if timeout_ms <= 0).
  * Returns on 0 success or a ssherr.h code on failure.
  */
 int
 kex_exchange_identification(struct ssh *ssh, int timeout_ms,
     const char *version_addendum)
 {
 	int remote_major, remote_minor, mismatch, oerrno = 0;
 	size_t len, n;
 	int r, expect_nl;
 	u_char c;
 	struct sshbuf *our_version = ssh->kex->server ?
 	    ssh->kex->server_version : ssh->kex->client_version;
 	struct sshbuf *peer_version = ssh->kex->server ?
 	    ssh->kex->client_version : ssh->kex->server_version;
 	char *our_version_string = NULL, *peer_version_string = NULL;
 	char *cp, *remote_version = NULL;
 
 	/* Prepare and send our banner */
 	sshbuf_reset(our_version);
 	if (version_addendum != NULL && *version_addendum == '\0')
 		version_addendum = NULL;
 	if ((r = sshbuf_putf(our_version, "SSH-%d.%d-%s%s%s\r\n",
 	    PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION,
 	    version_addendum == NULL ? "" : " ",
 	    version_addendum == NULL ? "" : version_addendum)) != 0) {
 		oerrno = errno;
 		error_fr(r, "sshbuf_putf");
 		goto out;
 	}
 
 	if (atomicio(vwrite, ssh_packet_get_connection_out(ssh),
 	    sshbuf_mutable_ptr(our_version),
 	    sshbuf_len(our_version)) != sshbuf_len(our_version)) {
 		oerrno = errno;
 		debug_f("write: %.100s", strerror(errno));
 		r = SSH_ERR_SYSTEM_ERROR;
 		goto out;
 	}
 	if ((r = sshbuf_consume_end(our_version, 2)) != 0) { /* trim \r\n */
 		oerrno = errno;
 		error_fr(r, "sshbuf_consume_end");
 		goto out;
 	}
 	our_version_string = sshbuf_dup_string(our_version);
 	if (our_version_string == NULL) {
 		error_f("sshbuf_dup_string failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	debug("Local version string %.100s", our_version_string);
 
 	/* Read other side's version identification. */
 	for (n = 0; ; n++) {
 		if (n >= SSH_MAX_PRE_BANNER_LINES) {
 			send_error(ssh, "No SSH identification string "
 			    "received.");
 			error_f("No SSH version received in first %u lines "
 			    "from server", SSH_MAX_PRE_BANNER_LINES);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		sshbuf_reset(peer_version);
 		expect_nl = 0;
 		for (;;) {
 			if (timeout_ms > 0) {
 				r = waitrfd(ssh_packet_get_connection_in(ssh),
 				    &timeout_ms, NULL);
 				if (r == -1 && errno == ETIMEDOUT) {
 					send_error(ssh, "Timed out waiting "
 					    "for SSH identification string.");
 					error("Connection timed out during "
 					    "banner exchange");
 					r = SSH_ERR_CONN_TIMEOUT;
 					goto out;
 				} else if (r == -1) {
 					oerrno = errno;
 					error_f("%s", strerror(errno));
 					r = SSH_ERR_SYSTEM_ERROR;
 					goto out;
 				}
 			}
 
 			len = atomicio(read, ssh_packet_get_connection_in(ssh),
 			    &c, 1);
 			if (len != 1 && errno == EPIPE) {
 				verbose_f("Connection closed by remote host");
 				r = SSH_ERR_CONN_CLOSED;
 				goto out;
 			} else if (len != 1) {
 				oerrno = errno;
 				error_f("read: %.100s", strerror(errno));
 				r = SSH_ERR_SYSTEM_ERROR;
 				goto out;
 			}
 			if (c == '\r') {
 				expect_nl = 1;
 				continue;
 			}
 			if (c == '\n')
 				break;
 			if (c == '\0' || expect_nl) {
 				verbose_f("banner line contains invalid "
 				    "characters");
 				goto invalid;
 			}
 			if ((r = sshbuf_put_u8(peer_version, c)) != 0) {
 				oerrno = errno;
 				error_fr(r, "sshbuf_put");
 				goto out;
 			}
 			if (sshbuf_len(peer_version) > SSH_MAX_BANNER_LEN) {
 				verbose_f("banner line too long");
 				goto invalid;
 			}
 		}
 		/* Is this an actual protocol banner? */
 		if (sshbuf_len(peer_version) > 4 &&
 		    memcmp(sshbuf_ptr(peer_version), "SSH-", 4) == 0)
 			break;
 		/* If not, then just log the line and continue */
 		if ((cp = sshbuf_dup_string(peer_version)) == NULL) {
 			error_f("sshbuf_dup_string failed");
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		/* Do not accept lines before the SSH ident from a client */
 		if (ssh->kex->server) {
 			verbose_f("client sent invalid protocol identifier "
 			    "\"%.256s\"", cp);
 			free(cp);
 			goto invalid;
 		}
 		debug_f("banner line %zu: %s", n, cp);
 		free(cp);
 	}
 	peer_version_string = sshbuf_dup_string(peer_version);
 	if (peer_version_string == NULL)
 		fatal_f("sshbuf_dup_string failed");
 	/* XXX must be same size for sscanf */
 	if ((remote_version = calloc(1, sshbuf_len(peer_version))) == NULL) {
 		error_f("calloc failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/*
 	 * Check that the versions match.  In future this might accept
 	 * several versions and set appropriate flags to handle them.
 	 */
 	if (sscanf(peer_version_string, "SSH-%d.%d-%[^\n]\n",
 	    &remote_major, &remote_minor, remote_version) != 3) {
 		error("Bad remote protocol version identification: '%.100s'",
 		    peer_version_string);
  invalid:
 		send_error(ssh, "Invalid SSH identification string.");
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	debug("Remote protocol version %d.%d, remote software version %.100s",
 	    remote_major, remote_minor, remote_version);
 	compat_banner(ssh, remote_version);
 
 	mismatch = 0;
 	switch (remote_major) {
 	case 2:
 		break;
 	case 1:
 		if (remote_minor != 99)
 			mismatch = 1;
 		break;
 	default:
 		mismatch = 1;
 		break;
 	}
 	if (mismatch) {
 		error("Protocol major versions differ: %d vs. %d",
 		    PROTOCOL_MAJOR_2, remote_major);
 		send_error(ssh, "Protocol major versions differ.");
 		r = SSH_ERR_NO_PROTOCOL_VERSION;
 		goto out;
 	}
 
 	if (ssh->kex->server && (ssh->compat & SSH_BUG_PROBE) != 0) {
 		logit("probed from %s port %d with %s.  Don't panic.",
 		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 		    peer_version_string);
 		r = SSH_ERR_CONN_CLOSED; /* XXX */
 		goto out;
 	}
 	if (ssh->kex->server && (ssh->compat & SSH_BUG_SCANNER) != 0) {
 		logit("scanned from %s port %d with %s.  Don't panic.",
 		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 		    peer_version_string);
 		r = SSH_ERR_CONN_CLOSED; /* XXX */
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	free(our_version_string);
 	free(peer_version_string);
 	free(remote_version);
 	if (r == SSH_ERR_SYSTEM_ERROR)
 		errno = oerrno;
 	return r;
 }
 
diff --git a/kex.h b/kex.h
index ba3a6a4eaf36..0caf42b501f3 100644
--- a/kex.h
+++ b/kex.h
@@ -1,276 +1,276 @@
-/* $OpenBSD: kex.h,v 1.121 2023/12/18 14:45:49 djm Exp $ */
+/* $OpenBSD: kex.h,v 1.122 2024/02/02 00:13:34 djm Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifndef KEX_H
 #define KEX_H
 
 #include "mac.h"
 #include "crypto_api.h"
 
 #ifdef WITH_OPENSSL
 # include <openssl/bn.h>
 # include <openssl/dh.h>
 # include <openssl/ecdsa.h>
 # ifdef OPENSSL_HAS_ECC
 #  include <openssl/ec.h>
 # else /* OPENSSL_HAS_ECC */
 #  define EC_KEY	void
 #  define EC_GROUP	void
 #  define EC_POINT	void
 # endif /* OPENSSL_HAS_ECC */
 #else /* WITH_OPENSSL */
 # define DH		void
 # define BIGNUM		void
 # define EC_KEY		void
 # define EC_GROUP	void
 # define EC_POINT	void
 #endif /* WITH_OPENSSL */
 
 #define KEX_COOKIE_LEN	16
 
 #define	KEX_DH1				"diffie-hellman-group1-sha1"
 #define	KEX_DH14_SHA1			"diffie-hellman-group14-sha1"
 #define	KEX_DH14_SHA256			"diffie-hellman-group14-sha256"
 #define	KEX_DH16_SHA512			"diffie-hellman-group16-sha512"
 #define	KEX_DH18_SHA512			"diffie-hellman-group18-sha512"
 #define	KEX_DHGEX_SHA1			"diffie-hellman-group-exchange-sha1"
 #define	KEX_DHGEX_SHA256		"diffie-hellman-group-exchange-sha256"
 #define	KEX_ECDH_SHA2_NISTP256		"ecdh-sha2-nistp256"
 #define	KEX_ECDH_SHA2_NISTP384		"ecdh-sha2-nistp384"
 #define	KEX_ECDH_SHA2_NISTP521		"ecdh-sha2-nistp521"
 #define	KEX_CURVE25519_SHA256		"curve25519-sha256"
 #define	KEX_CURVE25519_SHA256_OLD	"curve25519-sha256@libssh.org"
 #define	KEX_SNTRUP761X25519_SHA512	"sntrup761x25519-sha512@openssh.com"
 
 #define COMP_NONE	0
 /* pre-auth compression (COMP_ZLIB) is only supported in the client */
 #define COMP_ZLIB	1
 #define COMP_DELAYED	2
 
 #define CURVE25519_SIZE 32
 
 enum kex_init_proposals {
 	PROPOSAL_KEX_ALGS,
 	PROPOSAL_SERVER_HOST_KEY_ALGS,
 	PROPOSAL_ENC_ALGS_CTOS,
 	PROPOSAL_ENC_ALGS_STOC,
 	PROPOSAL_MAC_ALGS_CTOS,
 	PROPOSAL_MAC_ALGS_STOC,
 	PROPOSAL_COMP_ALGS_CTOS,
 	PROPOSAL_COMP_ALGS_STOC,
 	PROPOSAL_LANG_CTOS,
 	PROPOSAL_LANG_STOC,
 	PROPOSAL_MAX
 };
 
 enum kex_modes {
 	MODE_IN,
 	MODE_OUT,
 	MODE_MAX
 };
 
 enum kex_exchange {
 	KEX_DH_GRP1_SHA1,
 	KEX_DH_GRP14_SHA1,
 	KEX_DH_GRP14_SHA256,
 	KEX_DH_GRP16_SHA512,
 	KEX_DH_GRP18_SHA512,
 	KEX_DH_GEX_SHA1,
 	KEX_DH_GEX_SHA256,
 	KEX_ECDH_SHA2,
 	KEX_C25519_SHA256,
 	KEX_KEM_SNTRUP761X25519_SHA512,
 	KEX_MAX
 };
 
 /* kex->flags */
 #define KEX_INIT_SENT			0x0001
 #define KEX_INITIAL			0x0002
 #define KEX_HAS_PUBKEY_HOSTBOUND	0x0004
-#define KEX_RSA_SHA2_256_SUPPORTED 	0x0008 /* only set in server for now */
-#define KEX_RSA_SHA2_512_SUPPORTED 	0x0010 /* only set in server for now */
-#define KEX_HAS_PING		 	0x0020
-#define KEX_HAS_EXT_INFO_IN_AUTH 	0x0040
+#define KEX_RSA_SHA2_256_SUPPORTED	0x0008 /* only set in server for now */
+#define KEX_RSA_SHA2_512_SUPPORTED	0x0010 /* only set in server for now */
+#define KEX_HAS_PING			0x0020
+#define KEX_HAS_EXT_INFO_IN_AUTH	0x0040
 
 struct sshenc {
 	char	*name;
 	const struct sshcipher *cipher;
 	int	enabled;
 	u_int	key_len;
 	u_int	iv_len;
 	u_int	block_size;
 	u_char	*key;
 	u_char	*iv;
 };
 struct sshcomp {
 	u_int	type;
 	int	enabled;
 	char	*name;
 };
 struct newkeys {
 	struct sshenc	enc;
 	struct sshmac	mac;
 	struct sshcomp  comp;
 };
 
 struct ssh;
 struct sshbuf;
 
 struct kex {
 	struct newkeys	*newkeys[MODE_MAX];
 	u_int	we_need;
 	u_int	dh_need;
 	int	server;
 	char	*name;
 	char	*hostkey_alg;
 	int	hostkey_type;
 	int	hostkey_nid;
 	u_int	kex_type;
 	char	*server_sig_algs;
 	int	ext_info_c;
 	int	ext_info_s;
 	int	kex_strict;
 	int	ext_info_received;
 	struct sshbuf *my;
 	struct sshbuf *peer;
 	struct sshbuf *client_version;
 	struct sshbuf *server_version;
 	struct sshbuf *session_id;
 	struct sshbuf *initial_sig;
 	struct sshkey *initial_hostkey;
 	sig_atomic_t done;
 	u_int	flags;
 	int	hash_alg;
 	int	ec_nid;
 	char	*failed_choice;
 	int	(*verify_host_key)(struct sshkey *, struct ssh *);
 	struct sshkey *(*load_host_public_key)(int, int, struct ssh *);
 	struct sshkey *(*load_host_private_key)(int, int, struct ssh *);
 	int	(*host_key_index)(struct sshkey *, int, struct ssh *);
 	int	(*sign)(struct ssh *, struct sshkey *, struct sshkey *,
 	    u_char **, size_t *, const u_char *, size_t, const char *);
 	int	(*kex[KEX_MAX])(struct ssh *);
 	/* kex specific state */
 	DH	*dh;			/* DH */
 	u_int	min, max, nbits;	/* GEX */
 	EC_KEY	*ec_client_key;		/* ECDH */
 	const EC_GROUP *ec_group;	/* ECDH */
 	u_char c25519_client_key[CURVE25519_SIZE]; /* 25519 + KEM */
 	u_char c25519_client_pubkey[CURVE25519_SIZE]; /* 25519 */
 	u_char sntrup761_client_key[crypto_kem_sntrup761_SECRETKEYBYTES]; /* KEM */
 	struct sshbuf *client_pub;
 };
 
 int	 kex_names_valid(const char *);
 char	*kex_alg_list(char);
 char	*kex_names_cat(const char *, const char *);
 int	 kex_assemble_names(char **, const char *, const char *);
 void	 kex_proposal_populate_entries(struct ssh *, char *prop[PROPOSAL_MAX],
     const char *, const char *, const char *, const char *, const char *);
 void	 kex_proposal_free_entries(char *prop[PROPOSAL_MAX]);
 
 int	 kex_exchange_identification(struct ssh *, int, const char *);
 
 struct kex *kex_new(void);
 int	 kex_ready(struct ssh *, char *[PROPOSAL_MAX]);
 int	 kex_setup(struct ssh *, char *[PROPOSAL_MAX]);
 void	 kex_free_newkeys(struct newkeys *);
 void	 kex_free(struct kex *);
 
 int	 kex_buf2prop(struct sshbuf *, int *, char ***);
 int	 kex_prop2buf(struct sshbuf *, char *proposal[PROPOSAL_MAX]);
 void	 kex_prop_free(char **);
 int	 kex_load_hostkey(struct ssh *, struct sshkey **, struct sshkey **);
 int	 kex_verify_host_key(struct ssh *, struct sshkey *);
 
 int	 kex_send_kexinit(struct ssh *);
 int	 kex_input_kexinit(int, u_int32_t, struct ssh *);
 int	 kex_input_ext_info(int, u_int32_t, struct ssh *);
 int	 kex_protocol_error(int, u_int32_t, struct ssh *);
 int	 kex_derive_keys(struct ssh *, u_char *, u_int, const struct sshbuf *);
 int	 kex_send_newkeys(struct ssh *);
 int	 kex_start_rekex(struct ssh *);
 int	 kex_server_update_ext_info(struct ssh *);
 void	 kex_set_server_sig_algs(struct ssh *, const char *);
 
 int	 kexgex_client(struct ssh *);
 int	 kexgex_server(struct ssh *);
 int	 kex_gen_client(struct ssh *);
 int	 kex_gen_server(struct ssh *);
 
 int	 kex_dh_keypair(struct kex *);
 int	 kex_dh_enc(struct kex *, const struct sshbuf *, struct sshbuf **,
     struct sshbuf **);
 int	 kex_dh_dec(struct kex *, const struct sshbuf *, struct sshbuf **);
 
 int	 kex_ecdh_keypair(struct kex *);
 int	 kex_ecdh_enc(struct kex *, const struct sshbuf *, struct sshbuf **,
     struct sshbuf **);
 int	 kex_ecdh_dec(struct kex *, const struct sshbuf *, struct sshbuf **);
 
 int	 kex_c25519_keypair(struct kex *);
 int	 kex_c25519_enc(struct kex *, const struct sshbuf *, struct sshbuf **,
     struct sshbuf **);
 int	 kex_c25519_dec(struct kex *, const struct sshbuf *, struct sshbuf **);
 
 int	 kex_kem_sntrup761x25519_keypair(struct kex *);
 int	 kex_kem_sntrup761x25519_enc(struct kex *, const struct sshbuf *,
     struct sshbuf **, struct sshbuf **);
 int	 kex_kem_sntrup761x25519_dec(struct kex *, const struct sshbuf *,
     struct sshbuf **);
 
 int	 kex_dh_keygen(struct kex *);
 int	 kex_dh_compute_key(struct kex *, BIGNUM *, struct sshbuf *);
 
 int	 kexgex_hash(int, const struct sshbuf *, const struct sshbuf *,
     const struct sshbuf *, const struct sshbuf *, const struct sshbuf *,
     int, int, int,
     const BIGNUM *, const BIGNUM *, const BIGNUM *,
     const BIGNUM *, const u_char *, size_t,
     u_char *, size_t *);
 
 void	kexc25519_keygen(u_char key[CURVE25519_SIZE], u_char pub[CURVE25519_SIZE])
 	__attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE)))
 	__attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE)));
 int	kexc25519_shared_key(const u_char key[CURVE25519_SIZE],
     const u_char pub[CURVE25519_SIZE], struct sshbuf *out)
 	__attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE)))
 	__attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE)));
 int	kexc25519_shared_key_ext(const u_char key[CURVE25519_SIZE],
     const u_char pub[CURVE25519_SIZE], struct sshbuf *out, int)
 	__attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE)))
 	__attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE)));
 
 #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH)
 void	dump_digest(const char *, const u_char *, int);
 #endif
 
 #if !defined(WITH_OPENSSL) || !defined(OPENSSL_HAS_ECC)
 # undef EC_KEY
 # undef EC_GROUP
 # undef EC_POINT
 #endif
 
 #endif
diff --git a/m4/openssh.m4 b/m4/openssh.m4
index 5d4c56280fce..033df501c3d8 100644
--- a/m4/openssh.m4
+++ b/m4/openssh.m4
@@ -1,217 +1,223 @@
 dnl OpenSSH-specific autoconf macros
 dnl
 
 dnl The test program that is used to try to trigger various compiler
 dnl behaviours.
 AC_DEFUN([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 	[AC_LANG_SOURCE([[
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /* Trivial function to help test for -fzero-call-used-regs */
 int f(int n) {return rand() % n;}
 char *f2(char *s, ...) {
 	char ret[64];
 	va_list args;
 	va_start(args, s);
 	vsnprintf(ret, sizeof(ret), s, args);
 	va_end(args);
 	return strdup(ret);
 }
+const char *f3(int s) {
+	return s ? "good" : "gooder";
+}
 int main(int argc, char **argv) {
-	(void)argv;
 	char b[256], *cp;
+	const char *s;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
 	double m = l / 0.5;
 	long long int n = argc * 12345LL, o = 12345LL * (long long int)argc;
+	(void)argv;
 	f(1);
-	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	s = f3(f(2));
+	snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
 	if (write(1, b, 0) == -1) exit(0);
-	cp = f2("%d %d %d %f %f %lld %lld\n", i,j,k,l,m,n,o);
+	cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
+	if (write(1, cp, 0) == -1) exit(0);
 	free(cp);
 	/*
 	 * Test fallthrough behaviour.  clang 10's -Wimplicit-fallthrough does
 	 * not understand comments and we don't use the "fallthrough" attribute
 	 * that it's looking for.
 	 */
 	switch(i){
 	case 0: j += i;
 		/* FALLTHROUGH */
 	default: j += k;
 	}
 	exit(0);
 }
 	]])]
 )
 
 dnl OSSH_CHECK_CFLAG_COMPILE(check_flag[, define_flag])
 dnl Check that $CC accepts a flag 'check_flag'. If it is supported append
 dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append
 dnl 'check_flag'.
 AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{
 	AC_MSG_CHECKING([if $CC supports compile flag $1])
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR $1"
 	_define_flag="$2"
 	test "x$_define_flag" = "x" && _define_flag="$1"
 	AC_COMPILE_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 		[
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		AC_MSG_RESULT([no])
 		CFLAGS="$saved_CFLAGS"
 else
 		dnl If we are compiling natively, try running the program.
 		AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 			[ AC_MSG_RESULT([yes])
 			  CFLAGS="$saved_CFLAGS $_define_flag" ],
 			[ AC_MSG_RESULT([no, fails at run time])
 			  CFLAGS="$saved_CFLAGS" ],
 			[ AC_MSG_RESULT([yes])
 			  CFLAGS="$saved_CFLAGS $_define_flag" ],
 		)
 fi],
 		[ AC_MSG_RESULT([no])
 		  CFLAGS="$saved_CFLAGS" ]
 	)
 }])
 
 dnl OSSH_CHECK_CFLAG_LINK(check_flag[, define_flag])
 dnl Check that $CC accepts a flag 'check_flag'. If it is supported append
 dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append
 dnl 'check_flag'.
 AC_DEFUN([OSSH_CHECK_CFLAG_LINK], [{
 	AC_MSG_CHECKING([if $CC supports compile flag $1 and linking succeeds])
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $WERROR $1"
 	_define_flag="$2"
 	test "x$_define_flag" = "x" && _define_flag="$1"
 	AC_LINK_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 		[
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		AC_MSG_RESULT([no])
 		CFLAGS="$saved_CFLAGS"
 else
 		dnl If we are compiling natively, try running the program.
 		AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 			[ AC_MSG_RESULT([yes])
 			  CFLAGS="$saved_CFLAGS $_define_flag" ],
 			[ AC_MSG_RESULT([no, fails at run time])
 			  CFLAGS="$saved_CFLAGS" ],
 			[ AC_MSG_RESULT([yes])
 			  CFLAGS="$saved_CFLAGS $_define_flag" ],
 		)
 fi],
 		[ AC_MSG_RESULT([no])
 		  CFLAGS="$saved_CFLAGS" ]
 	)
 }])
 
 dnl OSSH_CHECK_LDFLAG_LINK(check_flag[, define_flag])
 dnl Check that $LD accepts a flag 'check_flag'. If it is supported append
 dnl 'define_flag' to $LDFLAGS. If 'define_flag' is not specified, then append
 dnl 'check_flag'.
 AC_DEFUN([OSSH_CHECK_LDFLAG_LINK], [{
 	AC_MSG_CHECKING([if $LD supports link flag $1])
 	saved_LDFLAGS="$LDFLAGS"
 	LDFLAGS="$LDFLAGS $WERROR $1"
 	_define_flag="$2"
 	test "x$_define_flag" = "x" && _define_flag="$1"
 	AC_LINK_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 		[
 if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
 then
 		  AC_MSG_RESULT([no])
 		  LDFLAGS="$saved_LDFLAGS"
 else
 		  dnl If we are compiling natively, try running the program.
 		  AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
 			[ AC_MSG_RESULT([yes])
 			  LDFLAGS="$saved_LDFLAGS $_define_flag" ],
 			[ AC_MSG_RESULT([no, fails at run time])
 			  LDFLAGS="$saved_LDFLAGS" ],
 			[ AC_MSG_RESULT([yes])
 			  LDFLAGS="$saved_LDFLAGS $_define_flag" ]
 		  )
 fi		],
 		[ AC_MSG_RESULT([no])
 		  LDFLAGS="$saved_LDFLAGS" ]
 	)
 }])
 
 dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol)
 dnl Does AC_EGREP_HEADER on 'header' for the string 'field'
 dnl If found, set 'symbol' to be defined. Cache the result.
 dnl TODO: This is not foolproof, better to compile and read from there
 AC_DEFUN([OSSH_CHECK_HEADER_FOR_FIELD], [
 # look for field '$1' in header '$2'
 	dnl This strips characters illegal to m4 from the header filename
 	ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'`
 	dnl
 	ossh_varname="ossh_cv_$ossh_safe""_has_"$1
 	AC_MSG_CHECKING(for $1 field in $2)
 	AC_CACHE_VAL($ossh_varname, [
 		AC_EGREP_HEADER($1, $2, [ dnl
 			eval "$ossh_varname=yes" dnl
 		], [ dnl
 			eval "$ossh_varname=no" dnl
 		]) dnl
 	])
 	ossh_result=`eval 'echo $'"$ossh_varname"`
 	if test -n "`echo $ossh_varname`"; then
 		AC_MSG_RESULT($ossh_result)
 		if test "x$ossh_result" = "xyes"; then
 			AC_DEFINE($3, 1, [Define if you have $1 in $2])
 		fi
 	else
 		AC_MSG_RESULT(no)
 	fi
 ])
 
 dnl Check for socklen_t: historically on BSD it is an int, and in
 dnl POSIX 1g it is a type of its own, but some platforms use different
 dnl types for the argument to getsockopt, getpeername, etc.  So we
 dnl have to test to find something that will work.
 AC_DEFUN([TYPE_SOCKLEN_T],
 [
    AC_CHECK_TYPE([socklen_t], ,[
       AC_MSG_CHECKING([for socklen_t equivalent])
       AC_CACHE_VAL([curl_cv_socklen_t_equiv],
       [
 	 # Systems have either "struct sockaddr *" or
 	 # "void *" as the second argument to getpeername
 	 curl_cv_socklen_t_equiv=
 	 for arg2 in "struct sockaddr" void; do
 	    for t in int size_t unsigned long "unsigned long"; do
 	       AC_COMPILE_IFELSE([
 		  AC_LANG_PROGRAM([[
 		    #include <sys/types.h>
 		    #include <sys/socket.h>
 		    int getpeername (int, $arg2 *, $t *);
 		  ]], [[
 		    $t len;
 		    getpeername(0,0,&len);
 		  ]])
 	       ],[
 		  curl_cv_socklen_t_equiv="$t"
 		  break
 	       ])
 	    done
 	 done
 
 	 if test "x$curl_cv_socklen_t_equiv" = x; then
 	    AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
 	 fi
       ])
       AC_MSG_RESULT($curl_cv_socklen_t_equiv)
       AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
 			[type to use in place of socklen_t if not defined])],
       [#include <sys/types.h>
 #include <sys/socket.h>])
 ])
 
diff --git a/misc.c b/misc.c
index 3db2e4d0b01c..5dc9d54a2496 100644
--- a/misc.c
+++ b/misc.c
@@ -1,3065 +1,3078 @@
-/* $OpenBSD: misc.c,v 1.189 2023/10/12 03:36:32 djm Exp $ */
+/* $OpenBSD: misc.c,v 1.190 2024/03/04 02:16:11 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2005-2020 Damien Miller.  All rights reserved.
  * Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/wait.h>
 #include <sys/un.h>
 
 #include <limits.h>
 #ifdef HAVE_LIBGEN_H
 # include <libgen.h>
 #endif
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #ifdef HAVE_NLIST_H
 #include <nlist.h>
 #endif
 #include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
 
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #include <pwd.h>
 #include <grp.h>
 #endif
 #ifdef SSH_TUN_OPENBSD
 #include <net/if.h>
 #endif
 
 #include "xmalloc.h"
 #include "misc.h"
 #include "log.h"
 #include "ssh.h"
 #include "sshbuf.h"
 #include "ssherr.h"
 #include "platform.h"
 
 /* remove newline at end of string */
 char *
 chop(char *s)
 {
 	char *t = s;
 	while (*t) {
 		if (*t == '\n' || *t == '\r') {
 			*t = '\0';
 			return s;
 		}
 		t++;
 	}
 	return s;
 
 }
 
 /* remove whitespace from end of string */
 void
 rtrim(char *s)
 {
 	size_t i;
 
 	if ((i = strlen(s)) == 0)
 		return;
 	for (i--; i > 0; i--) {
 		if (isspace((unsigned char)s[i]))
 			s[i] = '\0';
 	}
 }
 
 /* set/unset filedescriptor to non-blocking */
 int
 set_nonblock(int fd)
 {
 	int val;
 
 	val = fcntl(fd, F_GETFL);
 	if (val == -1) {
 		error("fcntl(%d, F_GETFL): %s", fd, strerror(errno));
 		return (-1);
 	}
 	if (val & O_NONBLOCK) {
 		debug3("fd %d is O_NONBLOCK", fd);
 		return (0);
 	}
 	debug2("fd %d setting O_NONBLOCK", fd);
 	val |= O_NONBLOCK;
 	if (fcntl(fd, F_SETFL, val) == -1) {
 		debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,
 		    strerror(errno));
 		return (-1);
 	}
 	return (0);
 }
 
 int
 unset_nonblock(int fd)
 {
 	int val;
 
 	val = fcntl(fd, F_GETFL);
 	if (val == -1) {
 		error("fcntl(%d, F_GETFL): %s", fd, strerror(errno));
 		return (-1);
 	}
 	if (!(val & O_NONBLOCK)) {
 		debug3("fd %d is not O_NONBLOCK", fd);
 		return (0);
 	}
 	debug("fd %d clearing O_NONBLOCK", fd);
 	val &= ~O_NONBLOCK;
 	if (fcntl(fd, F_SETFL, val) == -1) {
 		debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",
 		    fd, strerror(errno));
 		return (-1);
 	}
 	return (0);
 }
 
 const char *
 ssh_gai_strerror(int gaierr)
 {
 	if (gaierr == EAI_SYSTEM && errno != 0)
 		return strerror(errno);
 	return gai_strerror(gaierr);
 }
 
 /* disable nagle on socket */
 void
 set_nodelay(int fd)
 {
 	int opt;
 	socklen_t optlen;
 
 	optlen = sizeof opt;
 	if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
 		debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
 		return;
 	}
 	if (opt == 1) {
 		debug2("fd %d is TCP_NODELAY", fd);
 		return;
 	}
 	opt = 1;
 	debug2("fd %d setting TCP_NODELAY", fd);
 	if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
 		error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
 }
 
 /* Allow local port reuse in TIME_WAIT */
 int
 set_reuseaddr(int fd)
 {
 	int on = 1;
 
 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
 		error("setsockopt SO_REUSEADDR fd %d: %s", fd, strerror(errno));
 		return -1;
 	}
 	return 0;
 }
 
 /* Get/set routing domain */
 char *
 get_rdomain(int fd)
 {
 #if defined(HAVE_SYS_GET_RDOMAIN)
 	return sys_get_rdomain(fd);
 #elif defined(__OpenBSD__)
 	int rtable;
 	char *ret;
 	socklen_t len = sizeof(rtable);
 
 	if (getsockopt(fd, SOL_SOCKET, SO_RTABLE, &rtable, &len) == -1) {
 		error("Failed to get routing domain for fd %d: %s",
 		    fd, strerror(errno));
 		return NULL;
 	}
 	xasprintf(&ret, "%d", rtable);
 	return ret;
 #else /* defined(__OpenBSD__) */
 	return NULL;
 #endif
 }
 
 int
 set_rdomain(int fd, const char *name)
 {
 #if defined(HAVE_SYS_SET_RDOMAIN)
 	return sys_set_rdomain(fd, name);
 #elif defined(__OpenBSD__)
 	int rtable;
 	const char *errstr;
 
 	if (name == NULL)
 		return 0; /* default table */
 
 	rtable = (int)strtonum(name, 0, 255, &errstr);
 	if (errstr != NULL) {
 		/* Shouldn't happen */
 		error("Invalid routing domain \"%s\": %s", name, errstr);
 		return -1;
 	}
 	if (setsockopt(fd, SOL_SOCKET, SO_RTABLE,
 	    &rtable, sizeof(rtable)) == -1) {
 		error("Failed to set routing domain %d on fd %d: %s",
 		    rtable, fd, strerror(errno));
 		return -1;
 	}
 	return 0;
 #else /* defined(__OpenBSD__) */
 	error("Setting routing domain is not supported on this platform");
 	return -1;
 #endif
 }
 
 int
 get_sock_af(int fd)
 {
 	struct sockaddr_storage to;
 	socklen_t tolen = sizeof(to);
 
 	memset(&to, 0, sizeof(to));
 	if (getsockname(fd, (struct sockaddr *)&to, &tolen) == -1)
 		return -1;
 #ifdef IPV4_IN_IPV6
 	if (to.ss_family == AF_INET6 &&
 	    IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&to)->sin6_addr))
 		return AF_INET;
 #endif
 	return to.ss_family;
 }
 
 void
 set_sock_tos(int fd, int tos)
 {
 #ifndef IP_TOS_IS_BROKEN
 	int af;
 
 	switch ((af = get_sock_af(fd))) {
 	case -1:
 		/* assume not a socket */
 		break;
 	case AF_INET:
 # ifdef IP_TOS
 		debug3_f("set socket %d IP_TOS 0x%02x", fd, tos);
 		if (setsockopt(fd, IPPROTO_IP, IP_TOS,
 		    &tos, sizeof(tos)) == -1) {
 			error("setsockopt socket %d IP_TOS %d: %s",
 			    fd, tos, strerror(errno));
 		}
 # endif /* IP_TOS */
 		break;
 	case AF_INET6:
 # ifdef IPV6_TCLASS
 		debug3_f("set socket %d IPV6_TCLASS 0x%02x", fd, tos);
 		if (setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS,
 		    &tos, sizeof(tos)) == -1) {
 			error("setsockopt socket %d IPV6_TCLASS %d: %s",
 			    fd, tos, strerror(errno));
 		}
 # endif /* IPV6_TCLASS */
 		break;
 	default:
 		debug2_f("unsupported socket family %d", af);
 		break;
 	}
 #endif /* IP_TOS_IS_BROKEN */
 }
 
 /*
  * Wait up to *timeoutp milliseconds for events on fd. Updates
  * *timeoutp with time remaining.
  * Returns 0 if fd ready or -1 on timeout or error (see errno).
  */
 static int
 waitfd(int fd, int *timeoutp, short events, volatile sig_atomic_t *stop)
 {
 	struct pollfd pfd;
 	struct timespec timeout;
 	int oerrno, r;
 	sigset_t nsigset, osigset;
 
 	if (timeoutp && *timeoutp == -1)
 		timeoutp = NULL;
 	pfd.fd = fd;
 	pfd.events = events;
 	ptimeout_init(&timeout);
 	if (timeoutp != NULL)
 		ptimeout_deadline_ms(&timeout, *timeoutp);
 	if (stop != NULL)
 		sigfillset(&nsigset);
 	for (; timeoutp == NULL || *timeoutp >= 0;) {
 		if (stop != NULL) {
 			sigprocmask(SIG_BLOCK, &nsigset, &osigset);
 			if (*stop) {
 				sigprocmask(SIG_SETMASK, &osigset, NULL);
 				errno = EINTR;
 				return -1;
 			}
 		}
 		r = ppoll(&pfd, 1, ptimeout_get_tsp(&timeout),
 		    stop != NULL ? &osigset : NULL);
 		oerrno = errno;
 		if (stop != NULL)
 			sigprocmask(SIG_SETMASK, &osigset, NULL);
 		if (timeoutp)
 			*timeoutp = ptimeout_get_ms(&timeout);
 		errno = oerrno;
 		if (r > 0)
 			return 0;
 		else if (r == -1 && errno != EAGAIN && errno != EINTR)
 			return -1;
 		else if (r == 0)
 			break;
 	}
 	/* timeout */
 	errno = ETIMEDOUT;
 	return -1;
 }
 
 /*
  * Wait up to *timeoutp milliseconds for fd to be readable. Updates
  * *timeoutp with time remaining.
  * Returns 0 if fd ready or -1 on timeout or error (see errno).
  */
 int
 waitrfd(int fd, int *timeoutp, volatile sig_atomic_t *stop) {
 	return waitfd(fd, timeoutp, POLLIN, stop);
 }
 
 /*
  * Attempt a non-blocking connect(2) to the specified address, waiting up to
  * *timeoutp milliseconds for the connection to complete. If the timeout is
  * <=0, then wait indefinitely.
  *
  * Returns 0 on success or -1 on failure.
  */
 int
 timeout_connect(int sockfd, const struct sockaddr *serv_addr,
     socklen_t addrlen, int *timeoutp)
 {
 	int optval = 0;
 	socklen_t optlen = sizeof(optval);
 
 	/* No timeout: just do a blocking connect() */
 	if (timeoutp == NULL || *timeoutp <= 0)
 		return connect(sockfd, serv_addr, addrlen);
 
 	set_nonblock(sockfd);
 	for (;;) {
 		if (connect(sockfd, serv_addr, addrlen) == 0) {
 			/* Succeeded already? */
 			unset_nonblock(sockfd);
 			return 0;
 		} else if (errno == EINTR)
 			continue;
 		else if (errno != EINPROGRESS)
 			return -1;
 		break;
 	}
 
 	if (waitfd(sockfd, timeoutp, POLLIN | POLLOUT, NULL) == -1)
 		return -1;
 
 	/* Completed or failed */
 	if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &optval, &optlen) == -1) {
 		debug("getsockopt: %s", strerror(errno));
 		return -1;
 	}
 	if (optval != 0) {
 		errno = optval;
 		return -1;
 	}
 	unset_nonblock(sockfd);
 	return 0;
 }
 
 /* Characters considered whitespace in strsep calls. */
 #define WHITESPACE " \t\r\n"
 #define QUOTE	"\""
 
 /* return next token in configuration line */
 static char *
 strdelim_internal(char **s, int split_equals)
 {
 	char *old;
 	int wspace = 0;
 
 	if (*s == NULL)
 		return NULL;
 
 	old = *s;
 
 	*s = strpbrk(*s,
 	    split_equals ? WHITESPACE QUOTE "=" : WHITESPACE QUOTE);
 	if (*s == NULL)
 		return (old);
 
 	if (*s[0] == '\"') {
 		memmove(*s, *s + 1, strlen(*s)); /* move nul too */
 		/* Find matching quote */
 		if ((*s = strpbrk(*s, QUOTE)) == NULL) {
 			return (NULL);		/* no matching quote */
 		} else {
 			*s[0] = '\0';
 			*s += strspn(*s + 1, WHITESPACE) + 1;
 			return (old);
 		}
 	}
 
 	/* Allow only one '=' to be skipped */
 	if (split_equals && *s[0] == '=')
 		wspace = 1;
 	*s[0] = '\0';
 
 	/* Skip any extra whitespace after first token */
 	*s += strspn(*s + 1, WHITESPACE) + 1;
 	if (split_equals && *s[0] == '=' && !wspace)
 		*s += strspn(*s + 1, WHITESPACE) + 1;
 
 	return (old);
 }
 
 /*
  * Return next token in configuration line; splts on whitespace or a
  * single '=' character.
  */
 char *
 strdelim(char **s)
 {
 	return strdelim_internal(s, 1);
 }
 
 /*
  * Return next token in configuration line; splts on whitespace only.
  */
 char *
 strdelimw(char **s)
 {
 	return strdelim_internal(s, 0);
 }
 
 struct passwd *
 pwcopy(struct passwd *pw)
 {
 	struct passwd *copy = xcalloc(1, sizeof(*copy));
 
 	copy->pw_name = xstrdup(pw->pw_name);
 	copy->pw_passwd = xstrdup(pw->pw_passwd == NULL ? "*" : pw->pw_passwd);
 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
 	copy->pw_gecos = xstrdup(pw->pw_gecos);
 #endif
 	copy->pw_uid = pw->pw_uid;
 	copy->pw_gid = pw->pw_gid;
 #ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
 	copy->pw_expire = pw->pw_expire;
 #endif
 #ifdef HAVE_STRUCT_PASSWD_PW_CHANGE
 	copy->pw_change = pw->pw_change;
 #endif
 #ifdef HAVE_STRUCT_PASSWD_PW_CLASS
 	copy->pw_class = xstrdup(pw->pw_class);
 #endif
 	copy->pw_dir = xstrdup(pw->pw_dir);
 	copy->pw_shell = xstrdup(pw->pw_shell);
 	return copy;
 }
 
 /*
  * Convert ASCII string to TCP/IP port number.
  * Port must be >=0 and <=65535.
  * Return -1 if invalid.
  */
 int
 a2port(const char *s)
 {
 	struct servent *se;
 	long long port;
 	const char *errstr;
 
 	port = strtonum(s, 0, 65535, &errstr);
 	if (errstr == NULL)
 		return (int)port;
 	if ((se = getservbyname(s, "tcp")) != NULL)
 		return ntohs(se->s_port);
 	return -1;
 }
 
 int
 a2tun(const char *s, int *remote)
 {
 	const char *errstr = NULL;
 	char *sp, *ep;
 	int tun;
 
 	if (remote != NULL) {
 		*remote = SSH_TUNID_ANY;
 		sp = xstrdup(s);
 		if ((ep = strchr(sp, ':')) == NULL) {
 			free(sp);
 			return (a2tun(s, NULL));
 		}
 		ep[0] = '\0'; ep++;
 		*remote = a2tun(ep, NULL);
 		tun = a2tun(sp, NULL);
 		free(sp);
 		return (*remote == SSH_TUNID_ERR ? *remote : tun);
 	}
 
 	if (strcasecmp(s, "any") == 0)
 		return (SSH_TUNID_ANY);
 
 	tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr);
 	if (errstr != NULL)
 		return (SSH_TUNID_ERR);
 
 	return (tun);
 }
 
 #define SECONDS		1
 #define MINUTES		(SECONDS * 60)
 #define HOURS		(MINUTES * 60)
 #define DAYS		(HOURS * 24)
 #define WEEKS		(DAYS * 7)
 
 /*
  * Convert a time string into seconds; format is
  * a sequence of:
  *      time[qualifier]
  *
  * Valid time qualifiers are:
  *      <none>  seconds
  *      s|S     seconds
  *      m|M     minutes
  *      h|H     hours
  *      d|D     days
  *      w|W     weeks
  *
  * Examples:
  *      90m     90 minutes
  *      1h30m   90 minutes
  *      2d      2 days
  *      1w      1 week
  *
  * Return -1 if time string is invalid.
  */
 int
 convtime(const char *s)
 {
 	long total, secs, multiplier;
 	const char *p;
 	char *endp;
 
 	errno = 0;
 	total = 0;
 	p = s;
 
 	if (p == NULL || *p == '\0')
 		return -1;
 
 	while (*p) {
 		secs = strtol(p, &endp, 10);
 		if (p == endp ||
 		    (errno == ERANGE && (secs == INT_MIN || secs == INT_MAX)) ||
 		    secs < 0)
 			return -1;
 
 		multiplier = 1;
 		switch (*endp++) {
 		case '\0':
 			endp--;
 			break;
 		case 's':
 		case 'S':
 			break;
 		case 'm':
 		case 'M':
 			multiplier = MINUTES;
 			break;
 		case 'h':
 		case 'H':
 			multiplier = HOURS;
 			break;
 		case 'd':
 		case 'D':
 			multiplier = DAYS;
 			break;
 		case 'w':
 		case 'W':
 			multiplier = WEEKS;
 			break;
 		default:
 			return -1;
 		}
 		if (secs > INT_MAX / multiplier)
 			return -1;
 		secs *= multiplier;
 		if  (total > INT_MAX - secs)
 			return -1;
 		total += secs;
 		if (total < 0)
 			return -1;
 		p = endp;
 	}
 
 	return total;
 }
 
 #define TF_BUFS	8
 #define TF_LEN	9
 
 const char *
 fmt_timeframe(time_t t)
 {
 	char		*buf;
 	static char	 tfbuf[TF_BUFS][TF_LEN];	/* ring buffer */
 	static int	 idx = 0;
 	unsigned int	 sec, min, hrs, day;
 	unsigned long long	week;
 
 	buf = tfbuf[idx++];
 	if (idx == TF_BUFS)
 		idx = 0;
 
 	week = t;
 
 	sec = week % 60;
 	week /= 60;
 	min = week % 60;
 	week /= 60;
 	hrs = week % 24;
 	week /= 24;
 	day = week % 7;
 	week /= 7;
 
 	if (week > 0)
 		snprintf(buf, TF_LEN, "%02lluw%01ud%02uh", week, day, hrs);
 	else if (day > 0)
 		snprintf(buf, TF_LEN, "%01ud%02uh%02um", day, hrs, min);
 	else
 		snprintf(buf, TF_LEN, "%02u:%02u:%02u", hrs, min, sec);
 
 	return (buf);
 }
 
 /*
  * Returns a standardized host+port identifier string.
  * Caller must free returned string.
  */
 char *
 put_host_port(const char *host, u_short port)
 {
 	char *hoststr;
 
 	if (port == 0 || port == SSH_DEFAULT_PORT)
 		return(xstrdup(host));
 	if (asprintf(&hoststr, "[%s]:%d", host, (int)port) == -1)
 		fatal("put_host_port: asprintf: %s", strerror(errno));
 	debug3("put_host_port: %s", hoststr);
 	return hoststr;
 }
 
 /*
  * Search for next delimiter between hostnames/addresses and ports.
  * Argument may be modified (for termination).
  * Returns *cp if parsing succeeds.
  * *cp is set to the start of the next field, if one was found.
  * The delimiter char, if present, is stored in delim.
  * If this is the last field, *cp is set to NULL.
  */
 char *
 hpdelim2(char **cp, char *delim)
 {
 	char *s, *old;
 
 	if (cp == NULL || *cp == NULL)
 		return NULL;
 
 	old = s = *cp;
 	if (*s == '[') {
 		if ((s = strchr(s, ']')) == NULL)
 			return NULL;
 		else
 			s++;
 	} else if ((s = strpbrk(s, ":/")) == NULL)
 		s = *cp + strlen(*cp); /* skip to end (see first case below) */
 
 	switch (*s) {
 	case '\0':
 		*cp = NULL;	/* no more fields*/
 		break;
 
 	case ':':
 	case '/':
 		if (delim != NULL)
 			*delim = *s;
 		*s = '\0';	/* terminate */
 		*cp = s + 1;
 		break;
 
 	default:
 		return NULL;
 	}
 
 	return old;
 }
 
 /* The common case: only accept colon as delimiter. */
 char *
 hpdelim(char **cp)
 {
 	char *r, delim = '\0';
 
 	r =  hpdelim2(cp, &delim);
 	if (delim == '/')
 		return NULL;
 	return r;
 }
 
 char *
 cleanhostname(char *host)
 {
 	if (*host == '[' && host[strlen(host) - 1] == ']') {
 		host[strlen(host) - 1] = '\0';
 		return (host + 1);
 	} else
 		return host;
 }
 
 char *
 colon(char *cp)
 {
 	int flag = 0;
 
 	if (*cp == ':')		/* Leading colon is part of file name. */
 		return NULL;
 	if (*cp == '[')
 		flag = 1;
 
 	for (; *cp; ++cp) {
 		if (*cp == '@' && *(cp+1) == '[')
 			flag = 1;
 		if (*cp == ']' && *(cp+1) == ':' && flag)
 			return (cp+1);
 		if (*cp == ':' && !flag)
 			return (cp);
 		if (*cp == '/')
 			return NULL;
 	}
 	return NULL;
 }
 
 /*
  * Parse a [user@]host:[path] string.
  * Caller must free returned user, host and path.
  * Any of the pointer return arguments may be NULL (useful for syntax checking).
  * If user was not specified then *userp will be set to NULL.
  * If host was not specified then *hostp will be set to NULL.
  * If path was not specified then *pathp will be set to ".".
  * Returns 0 on success, -1 on failure.
  */
 int
 parse_user_host_path(const char *s, char **userp, char **hostp, char **pathp)
 {
 	char *user = NULL, *host = NULL, *path = NULL;
 	char *sdup, *tmp;
 	int ret = -1;
 
 	if (userp != NULL)
 		*userp = NULL;
 	if (hostp != NULL)
 		*hostp = NULL;
 	if (pathp != NULL)
 		*pathp = NULL;
 
 	sdup = xstrdup(s);
 
 	/* Check for remote syntax: [user@]host:[path] */
 	if ((tmp = colon(sdup)) == NULL)
 		goto out;
 
 	/* Extract optional path */
 	*tmp++ = '\0';
 	if (*tmp == '\0')
 		tmp = ".";
 	path = xstrdup(tmp);
 
 	/* Extract optional user and mandatory host */
 	tmp = strrchr(sdup, '@');
 	if (tmp != NULL) {
 		*tmp++ = '\0';
 		host = xstrdup(cleanhostname(tmp));
 		if (*sdup != '\0')
 			user = xstrdup(sdup);
 	} else {
 		host = xstrdup(cleanhostname(sdup));
 		user = NULL;
 	}
 
 	/* Success */
 	if (userp != NULL) {
 		*userp = user;
 		user = NULL;
 	}
 	if (hostp != NULL) {
 		*hostp = host;
 		host = NULL;
 	}
 	if (pathp != NULL) {
 		*pathp = path;
 		path = NULL;
 	}
 	ret = 0;
 out:
 	free(sdup);
 	free(user);
 	free(host);
 	free(path);
 	return ret;
 }
 
 /*
  * Parse a [user@]host[:port] string.
  * Caller must free returned user and host.
  * Any of the pointer return arguments may be NULL (useful for syntax checking).
  * If user was not specified then *userp will be set to NULL.
  * If port was not specified then *portp will be -1.
  * Returns 0 on success, -1 on failure.
  */
 int
 parse_user_host_port(const char *s, char **userp, char **hostp, int *portp)
 {
 	char *sdup, *cp, *tmp;
 	char *user = NULL, *host = NULL;
 	int port = -1, ret = -1;
 
 	if (userp != NULL)
 		*userp = NULL;
 	if (hostp != NULL)
 		*hostp = NULL;
 	if (portp != NULL)
 		*portp = -1;
 
 	if ((sdup = tmp = strdup(s)) == NULL)
 		return -1;
 	/* Extract optional username */
 	if ((cp = strrchr(tmp, '@')) != NULL) {
 		*cp = '\0';
 		if (*tmp == '\0')
 			goto out;
 		if ((user = strdup(tmp)) == NULL)
 			goto out;
 		tmp = cp + 1;
 	}
 	/* Extract mandatory hostname */
 	if ((cp = hpdelim(&tmp)) == NULL || *cp == '\0')
 		goto out;
 	host = xstrdup(cleanhostname(cp));
 	/* Convert and verify optional port */
 	if (tmp != NULL && *tmp != '\0') {
 		if ((port = a2port(tmp)) <= 0)
 			goto out;
 	}
 	/* Success */
 	if (userp != NULL) {
 		*userp = user;
 		user = NULL;
 	}
 	if (hostp != NULL) {
 		*hostp = host;
 		host = NULL;
 	}
 	if (portp != NULL)
 		*portp = port;
 	ret = 0;
  out:
 	free(sdup);
 	free(user);
 	free(host);
 	return ret;
 }
 
 /*
  * Converts a two-byte hex string to decimal.
  * Returns the decimal value or -1 for invalid input.
  */
 static int
 hexchar(const char *s)
 {
 	unsigned char result[2];
 	int i;
 
 	for (i = 0; i < 2; i++) {
 		if (s[i] >= '0' && s[i] <= '9')
 			result[i] = (unsigned char)(s[i] - '0');
 		else if (s[i] >= 'a' && s[i] <= 'f')
 			result[i] = (unsigned char)(s[i] - 'a') + 10;
 		else if (s[i] >= 'A' && s[i] <= 'F')
 			result[i] = (unsigned char)(s[i] - 'A') + 10;
 		else
 			return -1;
 	}
 	return (result[0] << 4) | result[1];
 }
 
 /*
  * Decode an url-encoded string.
  * Returns a newly allocated string on success or NULL on failure.
  */
 static char *
 urldecode(const char *src)
 {
 	char *ret, *dst;
 	int ch;
 	size_t srclen;
 
 	if ((srclen = strlen(src)) >= SIZE_MAX)
 		fatal_f("input too large");
 	ret = xmalloc(srclen + 1);
 	for (dst = ret; *src != '\0'; src++) {
 		switch (*src) {
 		case '+':
 			*dst++ = ' ';
 			break;
 		case '%':
 			if (!isxdigit((unsigned char)src[1]) ||
 			    !isxdigit((unsigned char)src[2]) ||
 			    (ch = hexchar(src + 1)) == -1) {
 				free(ret);
 				return NULL;
 			}
 			*dst++ = ch;
 			src += 2;
 			break;
 		default:
 			*dst++ = *src;
 			break;
 		}
 	}
 	*dst = '\0';
 
 	return ret;
 }
 
 /*
  * Parse an (scp|ssh|sftp)://[user@]host[:port][/path] URI.
  * See https://tools.ietf.org/html/draft-ietf-secsh-scp-sftp-ssh-uri-04
  * Either user or path may be url-encoded (but not host or port).
  * Caller must free returned user, host and path.
  * Any of the pointer return arguments may be NULL (useful for syntax checking)
  * but the scheme must always be specified.
  * If user was not specified then *userp will be set to NULL.
  * If port was not specified then *portp will be -1.
  * If path was not specified then *pathp will be set to NULL.
  * Returns 0 on success, 1 if non-uri/wrong scheme, -1 on error/invalid uri.
  */
 int
 parse_uri(const char *scheme, const char *uri, char **userp, char **hostp,
     int *portp, char **pathp)
 {
 	char *uridup, *cp, *tmp, ch;
 	char *user = NULL, *host = NULL, *path = NULL;
 	int port = -1, ret = -1;
 	size_t len;
 
 	len = strlen(scheme);
 	if (strncmp(uri, scheme, len) != 0 || strncmp(uri + len, "://", 3) != 0)
 		return 1;
 	uri += len + 3;
 
 	if (userp != NULL)
 		*userp = NULL;
 	if (hostp != NULL)
 		*hostp = NULL;
 	if (portp != NULL)
 		*portp = -1;
 	if (pathp != NULL)
 		*pathp = NULL;
 
 	uridup = tmp = xstrdup(uri);
 
 	/* Extract optional ssh-info (username + connection params) */
 	if ((cp = strchr(tmp, '@')) != NULL) {
 		char *delim;
 
 		*cp = '\0';
 		/* Extract username and connection params */
 		if ((delim = strchr(tmp, ';')) != NULL) {
 			/* Just ignore connection params for now */
 			*delim = '\0';
 		}
 		if (*tmp == '\0') {
 			/* Empty username */
 			goto out;
 		}
 		if ((user = urldecode(tmp)) == NULL)
 			goto out;
 		tmp = cp + 1;
 	}
 
 	/* Extract mandatory hostname */
 	if ((cp = hpdelim2(&tmp, &ch)) == NULL || *cp == '\0')
 		goto out;
 	host = xstrdup(cleanhostname(cp));
 	if (!valid_domain(host, 0, NULL))
 		goto out;
 
 	if (tmp != NULL && *tmp != '\0') {
 		if (ch == ':') {
 			/* Convert and verify port. */
 			if ((cp = strchr(tmp, '/')) != NULL)
 				*cp = '\0';
 			if ((port = a2port(tmp)) <= 0)
 				goto out;
 			tmp = cp ? cp + 1 : NULL;
 		}
 		if (tmp != NULL && *tmp != '\0') {
 			/* Extract optional path */
 			if ((path = urldecode(tmp)) == NULL)
 				goto out;
 		}
 	}
 
 	/* Success */
 	if (userp != NULL) {
 		*userp = user;
 		user = NULL;
 	}
 	if (hostp != NULL) {
 		*hostp = host;
 		host = NULL;
 	}
 	if (portp != NULL)
 		*portp = port;
 	if (pathp != NULL) {
 		*pathp = path;
 		path = NULL;
 	}
 	ret = 0;
  out:
 	free(uridup);
 	free(user);
 	free(host);
 	free(path);
 	return ret;
 }
 
 /* function to assist building execv() arguments */
 void
 addargs(arglist *args, char *fmt, ...)
 {
 	va_list ap;
 	char *cp;
 	u_int nalloc;
 	int r;
 
 	va_start(ap, fmt);
 	r = vasprintf(&cp, fmt, ap);
 	va_end(ap);
 	if (r == -1)
 		fatal_f("argument too long");
 
 	nalloc = args->nalloc;
 	if (args->list == NULL) {
 		nalloc = 32;
 		args->num = 0;
 	} else if (args->num > (256 * 1024))
 		fatal_f("too many arguments");
 	else if (args->num >= args->nalloc)
 		fatal_f("arglist corrupt");
 	else if (args->num+2 >= nalloc)
 		nalloc *= 2;
 
 	args->list = xrecallocarray(args->list, args->nalloc,
 	    nalloc, sizeof(char *));
 	args->nalloc = nalloc;
 	args->list[args->num++] = cp;
 	args->list[args->num] = NULL;
 }
 
 void
 replacearg(arglist *args, u_int which, char *fmt, ...)
 {
 	va_list ap;
 	char *cp;
 	int r;
 
 	va_start(ap, fmt);
 	r = vasprintf(&cp, fmt, ap);
 	va_end(ap);
 	if (r == -1)
 		fatal_f("argument too long");
 	if (args->list == NULL || args->num >= args->nalloc)
 		fatal_f("arglist corrupt");
 
 	if (which >= args->num)
 		fatal_f("tried to replace invalid arg %d >= %d",
 		    which, args->num);
 	free(args->list[which]);
 	args->list[which] = cp;
 }
 
 void
 freeargs(arglist *args)
 {
 	u_int i;
 
 	if (args == NULL)
 		return;
 	if (args->list != NULL && args->num < args->nalloc) {
 		for (i = 0; i < args->num; i++)
 			free(args->list[i]);
 		free(args->list);
 	}
 	args->nalloc = args->num = 0;
 	args->list = NULL;
 }
 
 /*
  * Expands tildes in the file name.  Returns data allocated by xmalloc.
  * Warning: this calls getpw*.
  */
 int
 tilde_expand(const char *filename, uid_t uid, char **retp)
 {
 	char *ocopy = NULL, *copy, *s = NULL;
 	const char *path = NULL, *user = NULL;
 	struct passwd *pw;
 	size_t len;
 	int ret = -1, r, slash;
 
 	*retp = NULL;
 	if (*filename != '~') {
 		*retp = xstrdup(filename);
 		return 0;
 	}
 	ocopy = copy = xstrdup(filename + 1);
 
 	if (*copy == '\0')				/* ~ */
 		path = NULL;
 	else if (*copy == '/') {
 		copy += strspn(copy, "/");
 		if (*copy == '\0')
 			path = NULL;			/* ~/ */
 		else
 			path = copy;			/* ~/path */
 	} else {
 		user = copy;
 		if ((path = strchr(copy, '/')) != NULL) {
 			copy[path - copy] = '\0';
 			path++;
 			path += strspn(path, "/");
 			if (*path == '\0')		/* ~user/ */
 				path = NULL;
 			/* else				 ~user/path */
 		}
 		/* else					~user */
 	}
 	if (user != NULL) {
 		if ((pw = getpwnam(user)) == NULL) {
 			error_f("No such user %s", user);
 			goto out;
 		}
 	} else if ((pw = getpwuid(uid)) == NULL) {
 		error_f("No such uid %ld", (long)uid);
 		goto out;
 	}
 
 	/* Make sure directory has a trailing '/' */
 	slash = (len = strlen(pw->pw_dir)) == 0 || pw->pw_dir[len - 1] != '/';
 
 	if ((r = xasprintf(&s, "%s%s%s", pw->pw_dir,
 	    slash ? "/" : "", path != NULL ? path : "")) <= 0) {
 		error_f("xasprintf failed");
 		goto out;
 	}
 	if (r >= PATH_MAX) {
 		error_f("Path too long");
 		goto out;
 	}
 	/* success */
 	ret = 0;
 	*retp = s;
 	s = NULL;
  out:
 	free(s);
 	free(ocopy);
 	return ret;
 }
 
 char *
 tilde_expand_filename(const char *filename, uid_t uid)
 {
 	char *ret;
 
 	if (tilde_expand(filename, uid, &ret) != 0)
 		cleanup_exit(255);
 	return ret;
 }
 
 /*
  * Expand a string with a set of %[char] escapes and/or ${ENVIRONMENT}
  * substitutions.  A number of escapes may be specified as
  * (char *escape_chars, char *replacement) pairs. The list must be terminated
  * by a NULL escape_char. Returns replaced string in memory allocated by
  * xmalloc which the caller must free.
  */
 static char *
 vdollar_percent_expand(int *parseerror, int dollar, int percent,
     const char *string, va_list ap)
 {
 #define EXPAND_MAX_KEYS	64
 	u_int num_keys = 0, i;
 	struct {
 		const char *key;
 		const char *repl;
 	} keys[EXPAND_MAX_KEYS];
 	struct sshbuf *buf;
 	int r, missingvar = 0;
 	char *ret = NULL, *var, *varend, *val;
 	size_t len;
 
 	if ((buf = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if (parseerror == NULL)
 		fatal_f("null parseerror arg");
 	*parseerror = 1;
 
 	/* Gather keys if we're doing percent expansion. */
 	if (percent) {
 		for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) {
 			keys[num_keys].key = va_arg(ap, char *);
 			if (keys[num_keys].key == NULL)
 				break;
 			keys[num_keys].repl = va_arg(ap, char *);
 			if (keys[num_keys].repl == NULL) {
 				fatal_f("NULL replacement for token %s",
 				    keys[num_keys].key);
 			}
 		}
 		if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, char *) != NULL)
 			fatal_f("too many keys");
 		if (num_keys == 0)
 			fatal_f("percent expansion without token list");
 	}
 
 	/* Expand string */
 	for (i = 0; *string != '\0'; string++) {
 		/* Optionally process ${ENVIRONMENT} expansions. */
 		if (dollar && string[0] == '$' && string[1] == '{') {
 			string += 2;  /* skip over '${' */
 			if ((varend = strchr(string, '}')) == NULL) {
 				error_f("environment variable '%s' missing "
 				    "closing '}'", string);
 				goto out;
 			}
 			len = varend - string;
 			if (len == 0) {
 				error_f("zero-length environment variable");
 				goto out;
 			}
 			var = xmalloc(len + 1);
 			(void)strlcpy(var, string, len + 1);
 			if ((val = getenv(var)) == NULL) {
 				error_f("env var ${%s} has no value", var);
 				missingvar = 1;
 			} else {
 				debug3_f("expand ${%s} -> '%s'", var, val);
 				if ((r = sshbuf_put(buf, val, strlen(val))) !=0)
 					fatal_fr(r, "sshbuf_put ${}");
 			}
 			free(var);
 			string += len;
 			continue;
 		}
 
 		/*
 		 * Process percent expansions if we have a list of TOKENs.
 		 * If we're not doing percent expansion everything just gets
 		 * appended here.
 		 */
 		if (*string != '%' || !percent) {
  append:
 			if ((r = sshbuf_put_u8(buf, *string)) != 0)
 				fatal_fr(r, "sshbuf_put_u8 %%");
 			continue;
 		}
 		string++;
 		/* %% case */
 		if (*string == '%')
 			goto append;
 		if (*string == '\0') {
 			error_f("invalid format");
 			goto out;
 		}
 		for (i = 0; i < num_keys; i++) {
 			if (strchr(keys[i].key, *string) != NULL) {
 				if ((r = sshbuf_put(buf, keys[i].repl,
 				    strlen(keys[i].repl))) != 0)
 					fatal_fr(r, "sshbuf_put %%-repl");
 				break;
 			}
 		}
 		if (i >= num_keys) {
 			error_f("unknown key %%%c", *string);
 			goto out;
 		}
 	}
 	if (!missingvar && (ret = sshbuf_dup_string(buf)) == NULL)
 		fatal_f("sshbuf_dup_string failed");
 	*parseerror = 0;
  out:
 	sshbuf_free(buf);
 	return *parseerror ? NULL : ret;
 #undef EXPAND_MAX_KEYS
 }
 
 /*
  * Expand only environment variables.
  * Note that although this function is variadic like the other similar
  * functions, any such arguments will be unused.
  */
 
 char *
 dollar_expand(int *parseerr, const char *string, ...)
 {
 	char *ret;
 	int err;
 	va_list ap;
 
 	va_start(ap, string);
 	ret = vdollar_percent_expand(&err, 1, 0, string, ap);
 	va_end(ap);
 	if (parseerr != NULL)
 		*parseerr = err;
 	return ret;
 }
 
 /*
  * Returns expanded string or NULL if a specified environment variable is
  * not defined, or calls fatal if the string is invalid.
  */
 char *
 percent_expand(const char *string, ...)
 {
 	char *ret;
 	int err;
 	va_list ap;
 
 	va_start(ap, string);
 	ret = vdollar_percent_expand(&err, 0, 1, string, ap);
 	va_end(ap);
 	if (err)
 		fatal_f("failed");
 	return ret;
 }
 
 /*
  * Returns expanded string or NULL if a specified environment variable is
  * not defined, or calls fatal if the string is invalid.
  */
 char *
 percent_dollar_expand(const char *string, ...)
 {
 	char *ret;
 	int err;
 	va_list ap;
 
 	va_start(ap, string);
 	ret = vdollar_percent_expand(&err, 1, 1, string, ap);
 	va_end(ap);
 	if (err)
 		fatal_f("failed");
 	return ret;
 }
 
 int
 tun_open(int tun, int mode, char **ifname)
 {
 #if defined(CUSTOM_SYS_TUN_OPEN)
 	return (sys_tun_open(tun, mode, ifname));
 #elif defined(SSH_TUN_OPENBSD)
 	struct ifreq ifr;
 	char name[100];
 	int fd = -1, sock;
 	const char *tunbase = "tun";
 
 	if (ifname != NULL)
 		*ifname = NULL;
 
 	if (mode == SSH_TUNMODE_ETHERNET)
 		tunbase = "tap";
 
 	/* Open the tunnel device */
 	if (tun <= SSH_TUNID_MAX) {
 		snprintf(name, sizeof(name), "/dev/%s%d", tunbase, tun);
 		fd = open(name, O_RDWR);
 	} else if (tun == SSH_TUNID_ANY) {
 		for (tun = 100; tun >= 0; tun--) {
 			snprintf(name, sizeof(name), "/dev/%s%d",
 			    tunbase, tun);
 			if ((fd = open(name, O_RDWR)) >= 0)
 				break;
 		}
 	} else {
 		debug_f("invalid tunnel %u", tun);
 		return -1;
 	}
 
 	if (fd == -1) {
 		debug_f("%s open: %s", name, strerror(errno));
 		return -1;
 	}
 
 	debug_f("%s mode %d fd %d", name, mode, fd);
 
 	/* Bring interface up if it is not already */
 	snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", tunbase, tun);
 	if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
 		goto failed;
 
 	if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1) {
 		debug_f("get interface %s flags: %s", ifr.ifr_name,
 		    strerror(errno));
 		goto failed;
 	}
 
 	if (!(ifr.ifr_flags & IFF_UP)) {
 		ifr.ifr_flags |= IFF_UP;
 		if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) {
 			debug_f("activate interface %s: %s", ifr.ifr_name,
 			    strerror(errno));
 			goto failed;
 		}
 	}
 
 	if (ifname != NULL)
 		*ifname = xstrdup(ifr.ifr_name);
 
 	close(sock);
 	return fd;
 
  failed:
 	if (fd >= 0)
 		close(fd);
 	if (sock >= 0)
 		close(sock);
 	return -1;
 #else
 	error("Tunnel interfaces are not supported on this platform");
 	return (-1);
 #endif
 }
 
 void
 sanitise_stdfd(void)
 {
 	int nullfd, dupfd;
 
 	if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) {
 		fprintf(stderr, "Couldn't open /dev/null: %s\n",
 		    strerror(errno));
 		exit(1);
 	}
 	while (++dupfd <= STDERR_FILENO) {
 		/* Only populate closed fds. */
 		if (fcntl(dupfd, F_GETFL) == -1 && errno == EBADF) {
 			if (dup2(nullfd, dupfd) == -1) {
 				fprintf(stderr, "dup2: %s\n", strerror(errno));
 				exit(1);
 			}
 		}
 	}
 	if (nullfd > STDERR_FILENO)
 		close(nullfd);
 }
 
 char *
 tohex(const void *vp, size_t l)
 {
 	const u_char *p = (const u_char *)vp;
 	char b[3], *r;
 	size_t i, hl;
 
 	if (l > 65536)
 		return xstrdup("tohex: length > 65536");
 
 	hl = l * 2 + 1;
 	r = xcalloc(1, hl);
 	for (i = 0; i < l; i++) {
 		snprintf(b, sizeof(b), "%02x", p[i]);
 		strlcat(r, b, hl);
 	}
 	return (r);
 }
 
 /*
  * Extend string *sp by the specified format. If *sp is not NULL (or empty),
  * then the separator 'sep' will be prepended before the formatted arguments.
  * Extended strings are heap allocated.
  */
 void
 xextendf(char **sp, const char *sep, const char *fmt, ...)
 {
 	va_list ap;
 	char *tmp1, *tmp2;
 
 	va_start(ap, fmt);
 	xvasprintf(&tmp1, fmt, ap);
 	va_end(ap);
 
 	if (*sp == NULL || **sp == '\0') {
 		free(*sp);
 		*sp = tmp1;
 		return;
 	}
 	xasprintf(&tmp2, "%s%s%s", *sp, sep == NULL ? "" : sep, tmp1);
 	free(tmp1);
 	free(*sp);
 	*sp = tmp2;
 }
 
 
 u_int64_t
 get_u64(const void *vp)
 {
 	const u_char *p = (const u_char *)vp;
 	u_int64_t v;
 
 	v  = (u_int64_t)p[0] << 56;
 	v |= (u_int64_t)p[1] << 48;
 	v |= (u_int64_t)p[2] << 40;
 	v |= (u_int64_t)p[3] << 32;
 	v |= (u_int64_t)p[4] << 24;
 	v |= (u_int64_t)p[5] << 16;
 	v |= (u_int64_t)p[6] << 8;
 	v |= (u_int64_t)p[7];
 
 	return (v);
 }
 
 u_int32_t
 get_u32(const void *vp)
 {
 	const u_char *p = (const u_char *)vp;
 	u_int32_t v;
 
 	v  = (u_int32_t)p[0] << 24;
 	v |= (u_int32_t)p[1] << 16;
 	v |= (u_int32_t)p[2] << 8;
 	v |= (u_int32_t)p[3];
 
 	return (v);
 }
 
 u_int32_t
 get_u32_le(const void *vp)
 {
 	const u_char *p = (const u_char *)vp;
 	u_int32_t v;
 
 	v  = (u_int32_t)p[0];
 	v |= (u_int32_t)p[1] << 8;
 	v |= (u_int32_t)p[2] << 16;
 	v |= (u_int32_t)p[3] << 24;
 
 	return (v);
 }
 
 u_int16_t
 get_u16(const void *vp)
 {
 	const u_char *p = (const u_char *)vp;
 	u_int16_t v;
 
 	v  = (u_int16_t)p[0] << 8;
 	v |= (u_int16_t)p[1];
 
 	return (v);
 }
 
 void
 put_u64(void *vp, u_int64_t v)
 {
 	u_char *p = (u_char *)vp;
 
 	p[0] = (u_char)(v >> 56) & 0xff;
 	p[1] = (u_char)(v >> 48) & 0xff;
 	p[2] = (u_char)(v >> 40) & 0xff;
 	p[3] = (u_char)(v >> 32) & 0xff;
 	p[4] = (u_char)(v >> 24) & 0xff;
 	p[5] = (u_char)(v >> 16) & 0xff;
 	p[6] = (u_char)(v >> 8) & 0xff;
 	p[7] = (u_char)v & 0xff;
 }
 
 void
 put_u32(void *vp, u_int32_t v)
 {
 	u_char *p = (u_char *)vp;
 
 	p[0] = (u_char)(v >> 24) & 0xff;
 	p[1] = (u_char)(v >> 16) & 0xff;
 	p[2] = (u_char)(v >> 8) & 0xff;
 	p[3] = (u_char)v & 0xff;
 }
 
 void
 put_u32_le(void *vp, u_int32_t v)
 {
 	u_char *p = (u_char *)vp;
 
 	p[0] = (u_char)v & 0xff;
 	p[1] = (u_char)(v >> 8) & 0xff;
 	p[2] = (u_char)(v >> 16) & 0xff;
 	p[3] = (u_char)(v >> 24) & 0xff;
 }
 
 void
 put_u16(void *vp, u_int16_t v)
 {
 	u_char *p = (u_char *)vp;
 
 	p[0] = (u_char)(v >> 8) & 0xff;
 	p[1] = (u_char)v & 0xff;
 }
 
 void
 ms_subtract_diff(struct timeval *start, int *ms)
 {
 	struct timeval diff, finish;
 
 	monotime_tv(&finish);
 	timersub(&finish, start, &diff);
 	*ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000);
 }
 
 void
 ms_to_timespec(struct timespec *ts, int ms)
 {
 	if (ms < 0)
 		ms = 0;
 	ts->tv_sec = ms / 1000;
 	ts->tv_nsec = (ms % 1000) * 1000 * 1000;
 }
 
 void
 monotime_ts(struct timespec *ts)
 {
 	struct timeval tv;
 #if defined(HAVE_CLOCK_GETTIME) && (defined(CLOCK_BOOTTIME) || \
     defined(CLOCK_MONOTONIC) || defined(CLOCK_REALTIME))
 	static int gettime_failed = 0;
 
 	if (!gettime_failed) {
 # ifdef CLOCK_BOOTTIME
 		if (clock_gettime(CLOCK_BOOTTIME, ts) == 0)
 			return;
 # endif /* CLOCK_BOOTTIME */
 # ifdef CLOCK_MONOTONIC
 		if (clock_gettime(CLOCK_MONOTONIC, ts) == 0)
 			return;
 # endif /* CLOCK_MONOTONIC */
 # ifdef CLOCK_REALTIME
 		/* Not monotonic, but we're almost out of options here. */
 		if (clock_gettime(CLOCK_REALTIME, ts) == 0)
 			return;
 # endif /* CLOCK_REALTIME */
 		debug3("clock_gettime: %s", strerror(errno));
 		gettime_failed = 1;
 	}
 #endif /* HAVE_CLOCK_GETTIME && (BOOTTIME || MONOTONIC || REALTIME) */
 	gettimeofday(&tv, NULL);
 	ts->tv_sec = tv.tv_sec;
 	ts->tv_nsec = (long)tv.tv_usec * 1000;
 }
 
 void
 monotime_tv(struct timeval *tv)
 {
 	struct timespec ts;
 
 	monotime_ts(&ts);
 	tv->tv_sec = ts.tv_sec;
 	tv->tv_usec = ts.tv_nsec / 1000;
 }
 
 time_t
 monotime(void)
 {
 	struct timespec ts;
 
 	monotime_ts(&ts);
 	return ts.tv_sec;
 }
 
 double
 monotime_double(void)
 {
 	struct timespec ts;
 
 	monotime_ts(&ts);
 	return ts.tv_sec + ((double)ts.tv_nsec / 1000000000);
 }
 
 void
 bandwidth_limit_init(struct bwlimit *bw, u_int64_t kbps, size_t buflen)
 {
 	bw->buflen = buflen;
 	bw->rate = kbps;
 	bw->thresh = buflen;
 	bw->lamt = 0;
 	timerclear(&bw->bwstart);
 	timerclear(&bw->bwend);
 }
 
 /* Callback from read/write loop to insert bandwidth-limiting delays */
 void
 bandwidth_limit(struct bwlimit *bw, size_t read_len)
 {
 	u_int64_t waitlen;
 	struct timespec ts, rm;
 
 	bw->lamt += read_len;
 	if (!timerisset(&bw->bwstart)) {
 		monotime_tv(&bw->bwstart);
 		return;
 	}
 	if (bw->lamt < bw->thresh)
 		return;
 
 	monotime_tv(&bw->bwend);
 	timersub(&bw->bwend, &bw->bwstart, &bw->bwend);
 	if (!timerisset(&bw->bwend))
 		return;
 
 	bw->lamt *= 8;
 	waitlen = (double)1000000L * bw->lamt / bw->rate;
 
 	bw->bwstart.tv_sec = waitlen / 1000000L;
 	bw->bwstart.tv_usec = waitlen % 1000000L;
 
 	if (timercmp(&bw->bwstart, &bw->bwend, >)) {
 		timersub(&bw->bwstart, &bw->bwend, &bw->bwend);
 
 		/* Adjust the wait time */
 		if (bw->bwend.tv_sec) {
 			bw->thresh /= 2;
 			if (bw->thresh < bw->buflen / 4)
 				bw->thresh = bw->buflen / 4;
 		} else if (bw->bwend.tv_usec < 10000) {
 			bw->thresh *= 2;
 			if (bw->thresh > bw->buflen * 8)
 				bw->thresh = bw->buflen * 8;
 		}
 
 		TIMEVAL_TO_TIMESPEC(&bw->bwend, &ts);
 		while (nanosleep(&ts, &rm) == -1) {
 			if (errno != EINTR)
 				break;
 			ts = rm;
 		}
 	}
 
 	bw->lamt = 0;
 	monotime_tv(&bw->bwstart);
 }
 
 /* Make a template filename for mk[sd]temp() */
 void
 mktemp_proto(char *s, size_t len)
 {
 	const char *tmpdir;
 	int r;
 
 	if ((tmpdir = getenv("TMPDIR")) != NULL) {
 		r = snprintf(s, len, "%s/ssh-XXXXXXXXXXXX", tmpdir);
 		if (r > 0 && (size_t)r < len)
 			return;
 	}
 	r = snprintf(s, len, "/tmp/ssh-XXXXXXXXXXXX");
 	if (r < 0 || (size_t)r >= len)
 		fatal_f("template string too short");
 }
 
 static const struct {
 	const char *name;
 	int value;
 } ipqos[] = {
 	{ "none", INT_MAX },		/* can't use 0 here; that's CS0 */
 	{ "af11", IPTOS_DSCP_AF11 },
 	{ "af12", IPTOS_DSCP_AF12 },
 	{ "af13", IPTOS_DSCP_AF13 },
 	{ "af21", IPTOS_DSCP_AF21 },
 	{ "af22", IPTOS_DSCP_AF22 },
 	{ "af23", IPTOS_DSCP_AF23 },
 	{ "af31", IPTOS_DSCP_AF31 },
 	{ "af32", IPTOS_DSCP_AF32 },
 	{ "af33", IPTOS_DSCP_AF33 },
 	{ "af41", IPTOS_DSCP_AF41 },
 	{ "af42", IPTOS_DSCP_AF42 },
 	{ "af43", IPTOS_DSCP_AF43 },
 	{ "cs0", IPTOS_DSCP_CS0 },
 	{ "cs1", IPTOS_DSCP_CS1 },
 	{ "cs2", IPTOS_DSCP_CS2 },
 	{ "cs3", IPTOS_DSCP_CS3 },
 	{ "cs4", IPTOS_DSCP_CS4 },
 	{ "cs5", IPTOS_DSCP_CS5 },
 	{ "cs6", IPTOS_DSCP_CS6 },
 	{ "cs7", IPTOS_DSCP_CS7 },
 	{ "ef", IPTOS_DSCP_EF },
 	{ "le", IPTOS_DSCP_LE },
 	{ "lowdelay", IPTOS_LOWDELAY },
 	{ "throughput", IPTOS_THROUGHPUT },
 	{ "reliability", IPTOS_RELIABILITY },
 	{ NULL, -1 }
 };
 
 int
 parse_ipqos(const char *cp)
 {
 	u_int i;
 	char *ep;
 	long val;
 
 	if (cp == NULL)
 		return -1;
 	for (i = 0; ipqos[i].name != NULL; i++) {
 		if (strcasecmp(cp, ipqos[i].name) == 0)
 			return ipqos[i].value;
 	}
 	/* Try parsing as an integer */
 	val = strtol(cp, &ep, 0);
 	if (*cp == '\0' || *ep != '\0' || val < 0 || val > 255)
 		return -1;
 	return val;
 }
 
 const char *
 iptos2str(int iptos)
 {
 	int i;
 	static char iptos_str[sizeof "0xff"];
 
 	for (i = 0; ipqos[i].name != NULL; i++) {
 		if (ipqos[i].value == iptos)
 			return ipqos[i].name;
 	}
 	snprintf(iptos_str, sizeof iptos_str, "0x%02x", iptos);
 	return iptos_str;
 }
 
 void
 lowercase(char *s)
 {
 	for (; *s; s++)
 		*s = tolower((u_char)*s);
 }
 
 int
 unix_listener(const char *path, int backlog, int unlink_first)
 {
 	struct sockaddr_un sunaddr;
 	int saved_errno, sock;
 
 	memset(&sunaddr, 0, sizeof(sunaddr));
 	sunaddr.sun_family = AF_UNIX;
 	if (strlcpy(sunaddr.sun_path, path,
 	    sizeof(sunaddr.sun_path)) >= sizeof(sunaddr.sun_path)) {
 		error_f("path \"%s\" too long for Unix domain socket", path);
 		errno = ENAMETOOLONG;
 		return -1;
 	}
 
 	sock = socket(PF_UNIX, SOCK_STREAM, 0);
 	if (sock == -1) {
 		saved_errno = errno;
 		error_f("socket: %.100s", strerror(errno));
 		errno = saved_errno;
 		return -1;
 	}
 	if (unlink_first == 1) {
 		if (unlink(path) != 0 && errno != ENOENT)
 			error("unlink(%s): %.100s", path, strerror(errno));
 	}
 	if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
 		saved_errno = errno;
 		error_f("cannot bind to path %s: %s", path, strerror(errno));
 		close(sock);
 		errno = saved_errno;
 		return -1;
 	}
 	if (listen(sock, backlog) == -1) {
 		saved_errno = errno;
 		error_f("cannot listen on path %s: %s", path, strerror(errno));
 		close(sock);
 		unlink(path);
 		errno = saved_errno;
 		return -1;
 	}
 	return sock;
 }
 
 void
 sock_set_v6only(int s)
 {
 #if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
 	int on = 1;
 
 	debug3("%s: set socket %d IPV6_V6ONLY", __func__, s);
 	if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) == -1)
 		error("setsockopt IPV6_V6ONLY: %s", strerror(errno));
 #endif
 }
 
 /*
  * Compares two strings that maybe be NULL. Returns non-zero if strings
  * are both NULL or are identical, returns zero otherwise.
  */
 static int
 strcmp_maybe_null(const char *a, const char *b)
 {
 	if ((a == NULL && b != NULL) || (a != NULL && b == NULL))
 		return 0;
 	if (a != NULL && strcmp(a, b) != 0)
 		return 0;
 	return 1;
 }
 
 /*
  * Compare two forwards, returning non-zero if they are identical or
  * zero otherwise.
  */
 int
 forward_equals(const struct Forward *a, const struct Forward *b)
 {
 	if (strcmp_maybe_null(a->listen_host, b->listen_host) == 0)
 		return 0;
 	if (a->listen_port != b->listen_port)
 		return 0;
 	if (strcmp_maybe_null(a->listen_path, b->listen_path) == 0)
 		return 0;
 	if (strcmp_maybe_null(a->connect_host, b->connect_host) == 0)
 		return 0;
 	if (a->connect_port != b->connect_port)
 		return 0;
 	if (strcmp_maybe_null(a->connect_path, b->connect_path) == 0)
 		return 0;
 	/* allocated_port and handle are not checked */
 	return 1;
 }
 
 /* returns 1 if process is already daemonized, 0 otherwise */
 int
 daemonized(void)
 {
 	int fd;
 
 	if ((fd = open(_PATH_TTY, O_RDONLY | O_NOCTTY)) >= 0) {
 		close(fd);
 		return 0;	/* have controlling terminal */
 	}
 	if (getppid() != 1)
 		return 0;	/* parent is not init */
 	if (getsid(0) != getpid())
 		return 0;	/* not session leader */
 	debug3("already daemonized");
 	return 1;
 }
 
 /*
  * Splits 's' into an argument vector. Handles quoted string and basic
  * escape characters (\\, \", \'). Caller must free the argument vector
  * and its members.
  */
 int
 argv_split(const char *s, int *argcp, char ***argvp, int terminate_on_comment)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	int argc = 0, quote, i, j;
 	char *arg, **argv = xcalloc(1, sizeof(*argv));
 
 	*argvp = NULL;
 	*argcp = 0;
 
 	for (i = 0; s[i] != '\0'; i++) {
 		/* Skip leading whitespace */
 		if (s[i] == ' ' || s[i] == '\t')
 			continue;
 		if (terminate_on_comment && s[i] == '#')
 			break;
 		/* Start of a token */
 		quote = 0;
 
 		argv = xreallocarray(argv, (argc + 2), sizeof(*argv));
 		arg = argv[argc++] = xcalloc(1, strlen(s + i) + 1);
 		argv[argc] = NULL;
 
 		/* Copy the token in, removing escapes */
 		for (j = 0; s[i] != '\0'; i++) {
 			if (s[i] == '\\') {
 				if (s[i + 1] == '\'' ||
 				    s[i + 1] == '\"' ||
 				    s[i + 1] == '\\' ||
 				    (quote == 0 && s[i + 1] == ' ')) {
 					i++; /* Skip '\' */
 					arg[j++] = s[i];
 				} else {
 					/* Unrecognised escape */
 					arg[j++] = s[i];
 				}
 			} else if (quote == 0 && (s[i] == ' ' || s[i] == '\t'))
 				break; /* done */
 			else if (quote == 0 && (s[i] == '\"' || s[i] == '\''))
 				quote = s[i]; /* quote start */
 			else if (quote != 0 && s[i] == quote)
 				quote = 0; /* quote end */
 			else
 				arg[j++] = s[i];
 		}
 		if (s[i] == '\0') {
 			if (quote != 0) {
 				/* Ran out of string looking for close quote */
 				r = SSH_ERR_INVALID_FORMAT;
 				goto out;
 			}
 			break;
 		}
 	}
 	/* Success */
 	*argcp = argc;
 	*argvp = argv;
 	argc = 0;
 	argv = NULL;
 	r = 0;
  out:
 	if (argc != 0 && argv != NULL) {
 		for (i = 0; i < argc; i++)
 			free(argv[i]);
 		free(argv);
 	}
 	return r;
 }
 
 /*
  * Reassemble an argument vector into a string, quoting and escaping as
  * necessary. Caller must free returned string.
  */
 char *
 argv_assemble(int argc, char **argv)
 {
 	int i, j, ws, r;
 	char c, *ret;
 	struct sshbuf *buf, *arg;
 
 	if ((buf = sshbuf_new()) == NULL || (arg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 
 	for (i = 0; i < argc; i++) {
 		ws = 0;
 		sshbuf_reset(arg);
 		for (j = 0; argv[i][j] != '\0'; j++) {
 			r = 0;
 			c = argv[i][j];
 			switch (c) {
 			case ' ':
 			case '\t':
 				ws = 1;
 				r = sshbuf_put_u8(arg, c);
 				break;
 			case '\\':
 			case '\'':
 			case '"':
 				if ((r = sshbuf_put_u8(arg, '\\')) != 0)
 					break;
 				/* FALLTHROUGH */
 			default:
 				r = sshbuf_put_u8(arg, c);
 				break;
 			}
 			if (r != 0)
 				fatal_fr(r, "sshbuf_put_u8");
 		}
 		if ((i != 0 && (r = sshbuf_put_u8(buf, ' ')) != 0) ||
 		    (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0) ||
 		    (r = sshbuf_putb(buf, arg)) != 0 ||
 		    (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0))
 			fatal_fr(r, "assemble");
 	}
 	if ((ret = malloc(sshbuf_len(buf) + 1)) == NULL)
 		fatal_f("malloc failed");
 	memcpy(ret, sshbuf_ptr(buf), sshbuf_len(buf));
 	ret[sshbuf_len(buf)] = '\0';
 	sshbuf_free(buf);
 	sshbuf_free(arg);
 	return ret;
 }
 
 char *
 argv_next(int *argcp, char ***argvp)
 {
 	char *ret = (*argvp)[0];
 
 	if (*argcp > 0 && ret != NULL) {
 		(*argcp)--;
 		(*argvp)++;
 	}
 	return ret;
 }
 
 void
 argv_consume(int *argcp)
 {
 	*argcp = 0;
 }
 
 void
 argv_free(char **av, int ac)
 {
 	int i;
 
 	if (av == NULL)
 		return;
 	for (i = 0; i < ac; i++)
 		free(av[i]);
 	free(av);
 }
 
 /* Returns 0 if pid exited cleanly, non-zero otherwise */
 int
 exited_cleanly(pid_t pid, const char *tag, const char *cmd, int quiet)
 {
 	int status;
 
 	while (waitpid(pid, &status, 0) == -1) {
 		if (errno != EINTR) {
 			error("%s waitpid: %s", tag, strerror(errno));
 			return -1;
 		}
 	}
 	if (WIFSIGNALED(status)) {
 		error("%s %s exited on signal %d", tag, cmd, WTERMSIG(status));
 		return -1;
 	} else if (WEXITSTATUS(status) != 0) {
 		do_log2(quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_INFO,
 		    "%s %s failed, status %d", tag, cmd, WEXITSTATUS(status));
 		return -1;
 	}
 	return 0;
 }
 
 /*
  * Check a given path for security. This is defined as all components
  * of the path to the file must be owned by either the owner of
  * of the file or root and no directories must be group or world writable.
  *
  * XXX Should any specific check be done for sym links ?
  *
  * Takes a file name, its stat information (preferably from fstat() to
  * avoid races), the uid of the expected owner, their home directory and an
  * error buffer plus max size as arguments.
  *
  * Returns 0 on success and -1 on failure
  */
 int
 safe_path(const char *name, struct stat *stp, const char *pw_dir,
     uid_t uid, char *err, size_t errlen)
 {
 	char buf[PATH_MAX], homedir[PATH_MAX];
 	char *cp;
 	int comparehome = 0;
 	struct stat st;
 
 	if (realpath(name, buf) == NULL) {
 		snprintf(err, errlen, "realpath %s failed: %s", name,
 		    strerror(errno));
 		return -1;
 	}
 	if (pw_dir != NULL && realpath(pw_dir, homedir) != NULL)
 		comparehome = 1;
 
 	if (!S_ISREG(stp->st_mode)) {
 		snprintf(err, errlen, "%s is not a regular file", buf);
 		return -1;
 	}
 	if ((!platform_sys_dir_uid(stp->st_uid) && stp->st_uid != uid) ||
 	    (stp->st_mode & 022) != 0) {
 		snprintf(err, errlen, "bad ownership or modes for file %s",
 		    buf);
 		return -1;
 	}
 
 	/* for each component of the canonical path, walking upwards */
 	for (;;) {
 		if ((cp = dirname(buf)) == NULL) {
 			snprintf(err, errlen, "dirname() failed");
 			return -1;
 		}
 		strlcpy(buf, cp, sizeof(buf));
 
 		if (stat(buf, &st) == -1 ||
 		    (!platform_sys_dir_uid(st.st_uid) && st.st_uid != uid) ||
 		    (st.st_mode & 022) != 0) {
 			snprintf(err, errlen,
 			    "bad ownership or modes for directory %s", buf);
 			return -1;
 		}
 
 		/* If are past the homedir then we can stop */
 		if (comparehome && strcmp(homedir, buf) == 0)
 			break;
 
 		/*
 		 * dirname should always complete with a "/" path,
 		 * but we can be paranoid and check for "." too
 		 */
 		if ((strcmp("/", buf) == 0) || (strcmp(".", buf) == 0))
 			break;
 	}
 	return 0;
 }
 
 /*
  * Version of safe_path() that accepts an open file descriptor to
  * avoid races.
  *
  * Returns 0 on success and -1 on failure
  */
 int
 safe_path_fd(int fd, const char *file, struct passwd *pw,
     char *err, size_t errlen)
 {
 	struct stat st;
 
 	/* check the open file to avoid races */
 	if (fstat(fd, &st) == -1) {
 		snprintf(err, errlen, "cannot stat file %s: %s",
 		    file, strerror(errno));
 		return -1;
 	}
 	return safe_path(file, &st, pw->pw_dir, pw->pw_uid, err, errlen);
 }
 
 /*
  * Sets the value of the given variable in the environment.  If the variable
  * already exists, its value is overridden.
  */
 void
 child_set_env(char ***envp, u_int *envsizep, const char *name,
 	const char *value)
 {
 	char **env;
 	u_int envsize;
 	u_int i, namelen;
 
 	if (strchr(name, '=') != NULL) {
 		error("Invalid environment variable \"%.100s\"", name);
 		return;
 	}
 
 	/*
 	 * If we're passed an uninitialized list, allocate a single null
 	 * entry before continuing.
 	 */
 	if ((*envp == NULL) != (*envsizep == 0))
 		fatal_f("environment size mismatch");
 	if (*envp == NULL && *envsizep == 0) {
 		*envp = xmalloc(sizeof(char *));
 		*envp[0] = NULL;
 		*envsizep = 1;
 	}
 
 	/*
 	 * Find the slot where the value should be stored.  If the variable
 	 * already exists, we reuse the slot; otherwise we append a new slot
 	 * at the end of the array, expanding if necessary.
 	 */
 	env = *envp;
 	namelen = strlen(name);
 	for (i = 0; env[i]; i++)
 		if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=')
 			break;
 	if (env[i]) {
 		/* Reuse the slot. */
 		free(env[i]);
 	} else {
 		/* New variable.  Expand if necessary. */
 		envsize = *envsizep;
 		if (i >= envsize - 1) {
 			if (envsize >= 1000)
 				fatal("child_set_env: too many env vars");
 			envsize += 50;
 			env = (*envp) = xreallocarray(env, envsize, sizeof(char *));
 			*envsizep = envsize;
 		}
 		/* Need to set the NULL pointer at end of array beyond the new slot. */
 		env[i + 1] = NULL;
 	}
 
 	/* Allocate space and format the variable in the appropriate slot. */
 	/* XXX xasprintf */
 	env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1);
 	snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value);
 }
 
 /*
  * Check and optionally lowercase a domain name, also removes trailing '.'
  * Returns 1 on success and 0 on failure, storing an error message in errstr.
  */
 int
 valid_domain(char *name, int makelower, const char **errstr)
 {
 	size_t i, l = strlen(name);
 	u_char c, last = '\0';
 	static char errbuf[256];
 
 	if (l == 0) {
 		strlcpy(errbuf, "empty domain name", sizeof(errbuf));
 		goto bad;
 	}
 	if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0])) {
 		snprintf(errbuf, sizeof(errbuf), "domain name \"%.100s\" "
 		    "starts with invalid character", name);
 		goto bad;
 	}
 	for (i = 0; i < l; i++) {
 		c = tolower((u_char)name[i]);
 		if (makelower)
 			name[i] = (char)c;
 		if (last == '.' && c == '.') {
 			snprintf(errbuf, sizeof(errbuf), "domain name "
 			    "\"%.100s\" contains consecutive separators", name);
 			goto bad;
 		}
 		if (c != '.' && c != '-' && !isalnum(c) &&
 		    c != '_') /* technically invalid, but common */ {
 			snprintf(errbuf, sizeof(errbuf), "domain name "
 			    "\"%.100s\" contains invalid characters", name);
 			goto bad;
 		}
 		last = c;
 	}
 	if (name[l - 1] == '.')
 		name[l - 1] = '\0';
 	if (errstr != NULL)
 		*errstr = NULL;
 	return 1;
 bad:
 	if (errstr != NULL)
 		*errstr = errbuf;
 	return 0;
 }
 
 /*
  * Verify that a environment variable name (not including initial '$') is
  * valid; consisting of one or more alphanumeric or underscore characters only.
  * Returns 1 on valid, 0 otherwise.
  */
 int
 valid_env_name(const char *name)
 {
 	const char *cp;
 
 	if (name[0] == '\0')
 		return 0;
 	for (cp = name; *cp != '\0'; cp++) {
 		if (!isalnum((u_char)*cp) && *cp != '_')
 			return 0;
 	}
 	return 1;
 }
 
 const char *
 atoi_err(const char *nptr, int *val)
 {
 	const char *errstr = NULL;
 	long long num;
 
 	if (nptr == NULL || *nptr == '\0')
 		return "missing";
 	num = strtonum(nptr, 0, INT_MAX, &errstr);
 	if (errstr == NULL)
 		*val = (int)num;
 	return errstr;
 }
 
 int
 parse_absolute_time(const char *s, uint64_t *tp)
 {
 	struct tm tm;
 	time_t tt;
 	char buf[32], *fmt;
 	const char *cp;
 	size_t l;
 	int is_utc = 0;
 
 	*tp = 0;
 
 	l = strlen(s);
 	if (l > 1 && strcasecmp(s + l - 1, "Z") == 0) {
 		is_utc = 1;
 		l--;
 	} else if (l > 3 && strcasecmp(s + l - 3, "UTC") == 0) {
 		is_utc = 1;
 		l -= 3;
 	}
 	/*
 	 * POSIX strptime says "The application shall ensure that there
 	 * is white-space or other non-alphanumeric characters between
 	 * any two conversion specifications" so arrange things this way.
 	 */
 	switch (l) {
 	case 8: /* YYYYMMDD */
 		fmt = "%Y-%m-%d";
 		snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
 		break;
 	case 12: /* YYYYMMDDHHMM */
 		fmt = "%Y-%m-%dT%H:%M";
 		snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s",
 		    s, s + 4, s + 6, s + 8, s + 10);
 		break;
 	case 14: /* YYYYMMDDHHMMSS */
 		fmt = "%Y-%m-%dT%H:%M:%S";
 		snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
 		    s, s + 4, s + 6, s + 8, s + 10, s + 12);
 		break;
 	default:
 		return SSH_ERR_INVALID_FORMAT;
 	}
 
 	memset(&tm, 0, sizeof(tm));
 	if ((cp = strptime(buf, fmt, &tm)) == NULL || *cp != '\0')
 		return SSH_ERR_INVALID_FORMAT;
 	if (is_utc) {
 		if ((tt = timegm(&tm)) < 0)
 			return SSH_ERR_INVALID_FORMAT;
 	} else {
 		if ((tt = mktime(&tm)) < 0)
 			return SSH_ERR_INVALID_FORMAT;
 	}
 	/* success */
 	*tp = (uint64_t)tt;
 	return 0;
 }
 
 void
 format_absolute_time(uint64_t t, char *buf, size_t len)
 {
 	time_t tt = t > SSH_TIME_T_MAX ? SSH_TIME_T_MAX : t;
 	struct tm tm;
 
 	localtime_r(&tt, &tm);
 	strftime(buf, len, "%Y-%m-%dT%H:%M:%S", &tm);
 }
 
 /*
  * Parse a "pattern=interval" clause (e.g. a ChannelTimeout).
  * Returns 0 on success or non-zero on failure.
  * Caller must free *typep.
  */
 int
 parse_pattern_interval(const char *s, char **typep, int *secsp)
 {
 	char *cp, *sdup;
 	int secs;
 
 	if (typep != NULL)
 		*typep = NULL;
 	if (secsp != NULL)
 		*secsp = 0;
 	if (s == NULL)
 		return -1;
 	sdup = xstrdup(s);
 
 	if ((cp = strchr(sdup, '=')) == NULL || cp == sdup) {
 		free(sdup);
 		return -1;
 	}
 	*cp++ = '\0';
 	if ((secs = convtime(cp)) < 0) {
 		free(sdup);
 		return -1;
 	}
 	/* success */
 	if (typep != NULL)
 		*typep = xstrdup(sdup);
 	if (secsp != NULL)
 		*secsp = secs;
 	free(sdup);
 	return 0;
 }
 
 /* check if path is absolute */
 int
 path_absolute(const char *path)
 {
 	return (*path == '/') ? 1 : 0;
 }
 
 void
 skip_space(char **cpp)
 {
 	char *cp;
 
 	for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++)
 		;
 	*cpp = cp;
 }
 
 /* authorized_key-style options parsing helpers */
 
 /*
  * Match flag 'opt' in *optsp, and if allow_negate is set then also match
  * 'no-opt'. Returns -1 if option not matched, 1 if option matches or 0
  * if negated option matches.
  * If the option or negated option matches, then *optsp is updated to
  * point to the first character after the option.
  */
 int
 opt_flag(const char *opt, int allow_negate, const char **optsp)
 {
 	size_t opt_len = strlen(opt);
 	const char *opts = *optsp;
 	int negate = 0;
 
 	if (allow_negate && strncasecmp(opts, "no-", 3) == 0) {
 		opts += 3;
 		negate = 1;
 	}
 	if (strncasecmp(opts, opt, opt_len) == 0) {
 		*optsp = opts + opt_len;
 		return negate ? 0 : 1;
 	}
 	return -1;
 }
 
 char *
 opt_dequote(const char **sp, const char **errstrp)
 {
 	const char *s = *sp;
 	char *ret;
 	size_t i;
 
 	*errstrp = NULL;
 	if (*s != '"') {
 		*errstrp = "missing start quote";
 		return NULL;
 	}
 	s++;
 	if ((ret = malloc(strlen((s)) + 1)) == NULL) {
 		*errstrp = "memory allocation failed";
 		return NULL;
 	}
 	for (i = 0; *s != '\0' && *s != '"';) {
 		if (s[0] == '\\' && s[1] == '"')
 			s++;
 		ret[i++] = *s++;
 	}
 	if (*s == '\0') {
 		*errstrp = "missing end quote";
 		free(ret);
 		return NULL;
 	}
 	ret[i] = '\0';
 	s++;
 	*sp = s;
 	return ret;
 }
 
 int
 opt_match(const char **opts, const char *term)
 {
 	if (strncasecmp((*opts), term, strlen(term)) == 0 &&
 	    (*opts)[strlen(term)] == '=') {
 		*opts += strlen(term) + 1;
 		return 1;
 	}
 	return 0;
 }
 
 void
 opt_array_append2(const char *file, const int line, const char *directive,
     char ***array, int **iarray, u_int *lp, const char *s, int i)
 {
 
 	if (*lp >= INT_MAX)
 		fatal("%s line %d: Too many %s entries", file, line, directive);
 
 	if (iarray != NULL) {
 		*iarray = xrecallocarray(*iarray, *lp, *lp + 1,
 		    sizeof(**iarray));
 		(*iarray)[*lp] = i;
 	}
 
 	*array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array));
 	(*array)[*lp] = xstrdup(s);
 	(*lp)++;
 }
 
 void
 opt_array_append(const char *file, const int line, const char *directive,
     char ***array, u_int *lp, const char *s)
 {
 	opt_array_append2(file, line, directive, array, NULL, lp, s, 0);
 }
 
+void
+opt_array_free2(char **array, int **iarray, u_int l)
+{
+	u_int i;
+
+	if (array == NULL || l == 0)
+		return;
+	for (i = 0; i < l; i++)
+		free(array[i]);
+	free(array);
+	free(iarray);
+}
+
 sshsig_t
 ssh_signal(int signum, sshsig_t handler)
 {
 	struct sigaction sa, osa;
 
 	/* mask all other signals while in handler */
 	memset(&sa, 0, sizeof(sa));
 	sa.sa_handler = handler;
 	sigfillset(&sa.sa_mask);
 #if defined(SA_RESTART) && !defined(NO_SA_RESTART)
 	if (signum != SIGALRM)
 		sa.sa_flags = SA_RESTART;
 #endif
 	if (sigaction(signum, &sa, &osa) == -1) {
 		debug3("sigaction(%s): %s", strsignal(signum), strerror(errno));
 		return SIG_ERR;
 	}
 	return osa.sa_handler;
 }
 
 int
 stdfd_devnull(int do_stdin, int do_stdout, int do_stderr)
 {
 	int devnull, ret = 0;
 
 	if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1) {
 		error_f("open %s: %s", _PATH_DEVNULL,
 		    strerror(errno));
 		return -1;
 	}
 	if ((do_stdin && dup2(devnull, STDIN_FILENO) == -1) ||
 	    (do_stdout && dup2(devnull, STDOUT_FILENO) == -1) ||
 	    (do_stderr && dup2(devnull, STDERR_FILENO) == -1)) {
 		error_f("dup2: %s", strerror(errno));
 		ret = -1;
 	}
 	if (devnull > STDERR_FILENO)
 		close(devnull);
 	return ret;
 }
 
 /*
  * Runs command in a subprocess with a minimal environment.
  * Returns pid on success, 0 on failure.
  * The child stdout and stderr maybe captured, left attached or sent to
  * /dev/null depending on the contents of flags.
  * "tag" is prepended to log messages.
  * NB. "command" is only used for logging; the actual command executed is
  * av[0].
  */
 pid_t
 subprocess(const char *tag, const char *command,
     int ac, char **av, FILE **child, u_int flags,
     struct passwd *pw, privdrop_fn *drop_privs, privrestore_fn *restore_privs)
 {
 	FILE *f = NULL;
 	struct stat st;
 	int fd, devnull, p[2], i;
 	pid_t pid;
 	char *cp, errmsg[512];
 	u_int nenv = 0;
 	char **env = NULL;
 
 	/* If dropping privs, then must specify user and restore function */
 	if (drop_privs != NULL && (pw == NULL || restore_privs == NULL)) {
 		error("%s: inconsistent arguments", tag); /* XXX fatal? */
 		return 0;
 	}
 	if (pw == NULL && (pw = getpwuid(getuid())) == NULL) {
 		error("%s: no user for current uid", tag);
 		return 0;
 	}
 	if (child != NULL)
 		*child = NULL;
 
 	debug3_f("%s command \"%s\" running as %s (flags 0x%x)",
 	    tag, command, pw->pw_name, flags);
 
 	/* Check consistency */
 	if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD) != 0 &&
 	    (flags & SSH_SUBPROCESS_STDOUT_CAPTURE) != 0) {
 		error_f("inconsistent flags");
 		return 0;
 	}
 	if (((flags & SSH_SUBPROCESS_STDOUT_CAPTURE) == 0) != (child == NULL)) {
 		error_f("inconsistent flags/output");
 		return 0;
 	}
 
 	/*
 	 * If executing an explicit binary, then verify the it exists
 	 * and appears safe-ish to execute
 	 */
 	if (!path_absolute(av[0])) {
 		error("%s path is not absolute", tag);
 		return 0;
 	}
 	if (drop_privs != NULL)
 		drop_privs(pw);
 	if (stat(av[0], &st) == -1) {
 		error("Could not stat %s \"%s\": %s", tag,
 		    av[0], strerror(errno));
 		goto restore_return;
 	}
 	if ((flags & SSH_SUBPROCESS_UNSAFE_PATH) == 0 &&
 	    safe_path(av[0], &st, NULL, 0, errmsg, sizeof(errmsg)) != 0) {
 		error("Unsafe %s \"%s\": %s", tag, av[0], errmsg);
 		goto restore_return;
 	}
 	/* Prepare to keep the child's stdout if requested */
 	if (pipe(p) == -1) {
 		error("%s: pipe: %s", tag, strerror(errno));
  restore_return:
 		if (restore_privs != NULL)
 			restore_privs();
 		return 0;
 	}
 	if (restore_privs != NULL)
 		restore_privs();
 
 	switch ((pid = fork())) {
 	case -1: /* error */
 		error("%s: fork: %s", tag, strerror(errno));
 		close(p[0]);
 		close(p[1]);
 		return 0;
 	case 0: /* child */
 		/* Prepare a minimal environment for the child. */
 		if ((flags & SSH_SUBPROCESS_PRESERVE_ENV) == 0) {
 			nenv = 5;
 			env = xcalloc(sizeof(*env), nenv);
 			child_set_env(&env, &nenv, "PATH", _PATH_STDPATH);
 			child_set_env(&env, &nenv, "USER", pw->pw_name);
 			child_set_env(&env, &nenv, "LOGNAME", pw->pw_name);
 			child_set_env(&env, &nenv, "HOME", pw->pw_dir);
 			if ((cp = getenv("LANG")) != NULL)
 				child_set_env(&env, &nenv, "LANG", cp);
 		}
 
 		for (i = 1; i < NSIG; i++)
 			ssh_signal(i, SIG_DFL);
 
 		if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1) {
 			error("%s: open %s: %s", tag, _PATH_DEVNULL,
 			    strerror(errno));
 			_exit(1);
 		}
 		if (dup2(devnull, STDIN_FILENO) == -1) {
 			error("%s: dup2: %s", tag, strerror(errno));
 			_exit(1);
 		}
 
 		/* Set up stdout as requested; leave stderr in place for now. */
 		fd = -1;
 		if ((flags & SSH_SUBPROCESS_STDOUT_CAPTURE) != 0)
 			fd = p[1];
 		else if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD) != 0)
 			fd = devnull;
 		if (fd != -1 && dup2(fd, STDOUT_FILENO) == -1) {
 			error("%s: dup2: %s", tag, strerror(errno));
 			_exit(1);
 		}
 		closefrom(STDERR_FILENO + 1);
 
 		if (geteuid() == 0 &&
 		    initgroups(pw->pw_name, pw->pw_gid) == -1) {
 			error("%s: initgroups(%s, %u): %s", tag,
 			    pw->pw_name, (u_int)pw->pw_gid, strerror(errno));
 			_exit(1);
 		}
 		if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1) {
 			error("%s: setresgid %u: %s", tag, (u_int)pw->pw_gid,
 			    strerror(errno));
 			_exit(1);
 		}
 		if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1) {
 			error("%s: setresuid %u: %s", tag, (u_int)pw->pw_uid,
 			    strerror(errno));
 			_exit(1);
 		}
 		/* stdin is pointed to /dev/null at this point */
 		if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD) != 0 &&
 		    dup2(STDIN_FILENO, STDERR_FILENO) == -1) {
 			error("%s: dup2: %s", tag, strerror(errno));
 			_exit(1);
 		}
 		if (env != NULL)
 			execve(av[0], av, env);
 		else
 			execv(av[0], av);
 		error("%s %s \"%s\": %s", tag, env == NULL ? "execv" : "execve",
 		    command, strerror(errno));
 		_exit(127);
 	default: /* parent */
 		break;
 	}
 
 	close(p[1]);
 	if ((flags & SSH_SUBPROCESS_STDOUT_CAPTURE) == 0)
 		close(p[0]);
 	else if ((f = fdopen(p[0], "r")) == NULL) {
 		error("%s: fdopen: %s", tag, strerror(errno));
 		close(p[0]);
 		/* Don't leave zombie child */
 		kill(pid, SIGTERM);
 		while (waitpid(pid, NULL, 0) == -1 && errno == EINTR)
 			;
 		return 0;
 	}
 	/* Success */
 	debug3_f("%s pid %ld", tag, (long)pid);
 	if (child != NULL)
 		*child = f;
 	return pid;
 }
 
 const char *
 lookup_env_in_list(const char *env, char * const *envs, size_t nenvs)
 {
 	size_t i, envlen;
 
 	envlen = strlen(env);
 	for (i = 0; i < nenvs; i++) {
 		if (strncmp(envs[i], env, envlen) == 0 &&
 		    envs[i][envlen] == '=') {
 			return envs[i] + envlen + 1;
 		}
 	}
 	return NULL;
 }
 
 const char *
 lookup_setenv_in_list(const char *env, char * const *envs, size_t nenvs)
 {
 	char *name, *cp;
 	const char *ret;
 
 	name = xstrdup(env);
 	if ((cp = strchr(name, '=')) == NULL) {
 		free(name);
 		return NULL; /* not env=val */
 	}
 	*cp = '\0';
 	ret = lookup_env_in_list(name, envs, nenvs);
 	free(name);
 	return ret;
 }
 
 /*
  * Helpers for managing poll(2)/ppoll(2) timeouts
  * Will remember the earliest deadline and return it for use in poll/ppoll.
  */
 
 /* Initialise a poll/ppoll timeout with an indefinite deadline */
 void
 ptimeout_init(struct timespec *pt)
 {
 	/*
 	 * Deliberately invalid for ppoll(2).
 	 * Will be converted to NULL in ptimeout_get_tspec() later.
 	 */
 	pt->tv_sec = -1;
 	pt->tv_nsec = 0;
 }
 
 /* Specify a poll/ppoll deadline of at most 'sec' seconds */
 void
 ptimeout_deadline_sec(struct timespec *pt, long sec)
 {
 	if (pt->tv_sec == -1 || pt->tv_sec >= sec) {
 		pt->tv_sec = sec;
 		pt->tv_nsec = 0;
 	}
 }
 
 /* Specify a poll/ppoll deadline of at most 'p' (timespec) */
 static void
 ptimeout_deadline_tsp(struct timespec *pt, struct timespec *p)
 {
 	if (pt->tv_sec == -1 || timespeccmp(pt, p, >=))
 		*pt = *p;
 }
 
 /* Specify a poll/ppoll deadline of at most 'ms' milliseconds */
 void
 ptimeout_deadline_ms(struct timespec *pt, long ms)
 {
 	struct timespec p;
 
 	p.tv_sec = ms / 1000;
 	p.tv_nsec = (ms % 1000) * 1000000;
 	ptimeout_deadline_tsp(pt, &p);
 }
 
 /* Specify a poll/ppoll deadline at wall clock monotime 'when' (timespec) */
 void
 ptimeout_deadline_monotime_tsp(struct timespec *pt, struct timespec *when)
 {
 	struct timespec now, t;
 
 	monotime_ts(&now);
 
 	if (timespeccmp(&now, when, >=)) {
 		/* 'when' is now or in the past. Timeout ASAP */
 		pt->tv_sec = 0;
 		pt->tv_nsec = 0;
 	} else {
 		timespecsub(when, &now, &t);
 		ptimeout_deadline_tsp(pt, &t);
 	}
 }
 
 /* Specify a poll/ppoll deadline at wall clock monotime 'when' */
 void
 ptimeout_deadline_monotime(struct timespec *pt, time_t when)
 {
 	struct timespec t;
 
 	t.tv_sec = when;
 	t.tv_nsec = 0;
 	ptimeout_deadline_monotime_tsp(pt, &t);
 }
 
 /* Get a poll(2) timeout value in milliseconds */
 int
 ptimeout_get_ms(struct timespec *pt)
 {
 	if (pt->tv_sec == -1)
 		return -1;
 	if (pt->tv_sec >= (INT_MAX - (pt->tv_nsec / 1000000)) / 1000)
 		return INT_MAX;
 	return (pt->tv_sec * 1000) + (pt->tv_nsec / 1000000);
 }
 
 /* Get a ppoll(2) timeout value as a timespec pointer */
 struct timespec *
 ptimeout_get_tsp(struct timespec *pt)
 {
 	return pt->tv_sec == -1 ? NULL : pt;
 }
 
 /* Returns non-zero if a timeout has been set (i.e. is not indefinite) */
 int
 ptimeout_isset(struct timespec *pt)
 {
 	return pt->tv_sec != -1;
 }
 
 /*
  * Returns zero if the library at 'path' contains symbol 's', nonzero
  * otherwise.
  */
 int
 lib_contains_symbol(const char *path, const char *s)
 {
 #ifdef HAVE_NLIST_H
 	struct nlist nl[2];
 	int ret = -1, r;
 
 	memset(nl, 0, sizeof(nl));
 	nl[0].n_name = xstrdup(s);
 	nl[1].n_name = NULL;
 	if ((r = nlist(path, nl)) == -1) {
 		error_f("nlist failed for %s", path);
 		goto out;
 	}
 	if (r != 0 || nl[0].n_value == 0 || nl[0].n_type == 0) {
 		error_f("library %s does not contain symbol %s", path, s);
 		goto out;
 	}
 	/* success */
 	ret = 0;
  out:
 	free(nl[0].n_name);
 	return ret;
 #else /* HAVE_NLIST_H */
 	int fd, ret = -1;
 	struct stat st;
 	void *m = NULL;
 	size_t sz = 0;
 
 	memset(&st, 0, sizeof(st));
 	if ((fd = open(path, O_RDONLY)) < 0) {
 		error_f("open %s: %s", path, strerror(errno));
 		return -1;
 	}
 	if (fstat(fd, &st) != 0) {
 		error_f("fstat %s: %s", path, strerror(errno));
 		goto out;
 	}
 	if (!S_ISREG(st.st_mode)) {
 		error_f("%s is not a regular file", path);
 		goto out;
 	}
 	if (st.st_size < 0 ||
 	    (size_t)st.st_size < strlen(s) ||
 	    st.st_size >= INT_MAX/2) {
 		error_f("%s bad size %lld", path, (long long)st.st_size);
 		goto out;
 	}
 	sz = (size_t)st.st_size;
 	if ((m = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, fd, 0)) == MAP_FAILED ||
 	    m == NULL) {
 		error_f("mmap %s: %s", path, strerror(errno));
 		goto out;
 	}
 	if (memmem(m, sz, s, strlen(s)) == NULL) {
 		error_f("%s does not contain expected string %s", path, s);
 		goto out;
 	}
 	/* success */
 	ret = 0;
  out:
 	if (m != NULL && m != MAP_FAILED)
 		munmap(m, sz);
 	close(fd);
 	return ret;
 #endif /* HAVE_NLIST_H */
 }
diff --git a/misc.h b/misc.h
index 74c6f832cb19..9bacce5203de 100644
--- a/misc.h
+++ b/misc.h
@@ -1,250 +1,251 @@
-/* $OpenBSD: misc.h,v 1.106 2023/10/11 22:42:26 djm Exp $ */
+/* $OpenBSD: misc.h,v 1.107 2024/03/04 02:16:11 djm Exp $ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #ifndef _MISC_H
 #define _MISC_H
 
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <stdio.h>
 #include <signal.h>
 
 /* Data structure for representing a forwarding request. */
 struct Forward {
 	char	 *listen_host;		/* Host (address) to listen on. */
 	int	  listen_port;		/* Port to forward. */
 	char	 *listen_path;		/* Path to bind domain socket. */
 	char	 *connect_host;		/* Host to connect. */
 	int	  connect_port;		/* Port to connect on connect_host. */
 	char	 *connect_path;		/* Path to connect domain socket. */
 	int	  allocated_port;	/* Dynamically allocated listen port */
 	int	  handle;		/* Handle for dynamic listen ports */
 };
 
 int forward_equals(const struct Forward *, const struct Forward *);
 int daemonized(void);
 
 /* Common server and client forwarding options. */
 struct ForwardOptions {
 	int	 gateway_ports; /* Allow remote connects to forwarded ports. */
 	mode_t	 streamlocal_bind_mask; /* umask for streamlocal binds */
 	int	 streamlocal_bind_unlink; /* unlink socket before bind */
 };
 
 /* misc.c */
 
 char	*chop(char *);
 void	 rtrim(char *);
 void	skip_space(char **);
 char	*strdelim(char **);
 char	*strdelimw(char **);
 int	 set_nonblock(int);
 int	 unset_nonblock(int);
 void	 set_nodelay(int);
 int	 set_reuseaddr(int);
 char	*get_rdomain(int);
 int	 set_rdomain(int, const char *);
 int	 get_sock_af(int);
 void	 set_sock_tos(int, int);
 int	 waitrfd(int, int *, volatile sig_atomic_t *);
 int	 timeout_connect(int, const struct sockaddr *, socklen_t, int *);
 int	 a2port(const char *);
 int	 a2tun(const char *, int *);
 char	*put_host_port(const char *, u_short);
 char	*hpdelim2(char **, char *);
 char	*hpdelim(char **);
 char	*cleanhostname(char *);
 char	*colon(char *);
 int	 parse_user_host_path(const char *, char **, char **, char **);
 int	 parse_user_host_port(const char *, char **, char **, int *);
 int	 parse_uri(const char *, const char *, char **, char **, int *, char **);
 int	 convtime(const char *);
 const char *fmt_timeframe(time_t t);
 int	 tilde_expand(const char *, uid_t, char **);
 char	*tilde_expand_filename(const char *, uid_t);
 
 char	*dollar_expand(int *, const char *string, ...);
 char	*percent_expand(const char *, ...) __attribute__((__sentinel__));
 char	*percent_dollar_expand(const char *, ...) __attribute__((__sentinel__));
 char	*tohex(const void *, size_t);
 void	 xextendf(char **s, const char *sep, const char *fmt, ...)
     __attribute__((__format__ (printf, 3, 4))) __attribute__((__nonnull__ (3)));
 void	 sanitise_stdfd(void);
 void	 ms_subtract_diff(struct timeval *, int *);
 void	 ms_to_timespec(struct timespec *, int);
 void	 monotime_ts(struct timespec *);
 void	 monotime_tv(struct timeval *);
 time_t	 monotime(void);
 double	 monotime_double(void);
 void	 lowercase(char *s);
 int	 unix_listener(const char *, int, int);
 int	 valid_domain(char *, int, const char **);
 int	 valid_env_name(const char *);
 const char *atoi_err(const char *, int *);
 int	 parse_absolute_time(const char *, uint64_t *);
 void	 format_absolute_time(uint64_t, char *, size_t);
 int	 parse_pattern_interval(const char *, char **, int *);
 int	 path_absolute(const char *);
 int	 stdfd_devnull(int, int, int);
 int	 lib_contains_symbol(const char *, const char *);
 
 void	 sock_set_v6only(int);
 
 struct passwd *pwcopy(struct passwd *);
 const char *ssh_gai_strerror(int);
 
 typedef void privdrop_fn(struct passwd *);
 typedef void privrestore_fn(void);
 #define	SSH_SUBPROCESS_STDOUT_DISCARD	(1)     /* Discard stdout */
 #define	SSH_SUBPROCESS_STDOUT_CAPTURE	(1<<1)  /* Redirect stdout */
 #define	SSH_SUBPROCESS_STDERR_DISCARD	(1<<2)  /* Discard stderr */
 #define	SSH_SUBPROCESS_UNSAFE_PATH	(1<<3)	/* Don't check for safe cmd */
 #define	SSH_SUBPROCESS_PRESERVE_ENV	(1<<4)	/* Keep parent environment */
 pid_t subprocess(const char *, const char *, int, char **, FILE **, u_int,
     struct passwd *, privdrop_fn *, privrestore_fn *);
 
 typedef struct arglist arglist;
 struct arglist {
 	char    **list;
 	u_int   num;
 	u_int   nalloc;
 };
 void	 addargs(arglist *, char *, ...)
 	    __attribute__((format(printf, 2, 3)));
 void	 replacearg(arglist *, u_int, char *, ...)
 	    __attribute__((format(printf, 3, 4)));
 void	 freeargs(arglist *);
 
 int	 tun_open(int, int, char **);
 
 /* Common definitions for ssh tunnel device forwarding */
 #define SSH_TUNMODE_NO		0x00
 #define SSH_TUNMODE_POINTOPOINT	0x01
 #define SSH_TUNMODE_ETHERNET	0x02
 #define SSH_TUNMODE_DEFAULT	SSH_TUNMODE_POINTOPOINT
 #define SSH_TUNMODE_YES		(SSH_TUNMODE_POINTOPOINT|SSH_TUNMODE_ETHERNET)
 
 #define SSH_TUNID_ANY		0x7fffffff
 #define SSH_TUNID_ERR		(SSH_TUNID_ANY - 1)
 #define SSH_TUNID_MAX		(SSH_TUNID_ANY - 2)
 
 /* Fake port to indicate that host field is really a path. */
 #define PORT_STREAMLOCAL	-2
 
 /* Functions to extract or store big-endian words of various sizes */
 u_int64_t	get_u64(const void *)
     __attribute__((__bounded__( __minbytes__, 1, 8)));
 u_int32_t	get_u32(const void *)
     __attribute__((__bounded__( __minbytes__, 1, 4)));
 u_int16_t	get_u16(const void *)
     __attribute__((__bounded__( __minbytes__, 1, 2)));
 void		put_u64(void *, u_int64_t)
     __attribute__((__bounded__( __minbytes__, 1, 8)));
 void		put_u32(void *, u_int32_t)
     __attribute__((__bounded__( __minbytes__, 1, 4)));
 void		put_u16(void *, u_int16_t)
     __attribute__((__bounded__( __minbytes__, 1, 2)));
 
 /* Little-endian store/load, used by umac.c */
 u_int32_t	get_u32_le(const void *)
     __attribute__((__bounded__(__minbytes__, 1, 4)));
 void		put_u32_le(void *, u_int32_t)
     __attribute__((__bounded__(__minbytes__, 1, 4)));
 
 struct bwlimit {
 	size_t buflen;
 	u_int64_t rate;		/* desired rate in kbit/s */
 	u_int64_t thresh;	/* threshold after which we'll check timers */
 	u_int64_t lamt;		/* amount written in last timer interval */
 	struct timeval bwstart, bwend;
 };
 
 void bandwidth_limit_init(struct bwlimit *, u_int64_t, size_t);
 void bandwidth_limit(struct bwlimit *, size_t);
 
 int parse_ipqos(const char *);
 const char *iptos2str(int);
 void mktemp_proto(char *, size_t);
 
 void	 child_set_env(char ***envp, u_int *envsizep, const char *name,
 	    const char *value);
 const char *lookup_env_in_list(const char *env,
 	    char * const *envs, size_t nenvs);
 const char *lookup_setenv_in_list(const char *env,
 	    char * const *envs, size_t nenvs);
 
 int	 argv_split(const char *, int *, char ***, int);
 char	*argv_assemble(int, char **argv);
 char	*argv_next(int *, char ***);
 void	 argv_consume(int *);
 void	 argv_free(char **, int);
 
 int	 exited_cleanly(pid_t, const char *, const char *, int);
 
 struct stat;
 int	 safe_path(const char *, struct stat *, const char *, uid_t,
 	    char *, size_t);
 int	 safe_path_fd(int, const char *, struct passwd *,
 	    char *err, size_t errlen);
 
 /* authorized_key-style options parsing helpers */
 int	opt_flag(const char *opt, int allow_negate, const char **optsp);
 char	*opt_dequote(const char **sp, const char **errstrp);
 int	opt_match(const char **opts, const char *term);
 
 /* readconf/servconf option lists */
 void	opt_array_append(const char *file, const int line,
 	    const char *directive, char ***array, u_int *lp, const char *s);
 void	opt_array_append2(const char *file, const int line,
 	    const char *directive, char ***array, int **iarray, u_int *lp,
 	    const char *s, int i);
+void	opt_array_free2(char **array, int **iarray, u_int l);
 
 struct timespec;
 void ptimeout_init(struct timespec *pt);
 void ptimeout_deadline_sec(struct timespec *pt, long sec);
 void ptimeout_deadline_ms(struct timespec *pt, long ms);
 void ptimeout_deadline_monotime_tsp(struct timespec *pt, struct timespec *when);
 void ptimeout_deadline_monotime(struct timespec *pt, time_t when);
 int ptimeout_get_ms(struct timespec *pt);
 struct timespec *ptimeout_get_tsp(struct timespec *pt);
 int ptimeout_isset(struct timespec *pt);
 
 /* readpass.c */
 
 #define RP_ECHO			0x0001
 #define RP_ALLOW_STDIN		0x0002
 #define RP_ALLOW_EOF		0x0004
 #define RP_USE_ASKPASS		0x0008
 
 struct notifier_ctx;
 
 char	*read_passphrase(const char *, int);
 int	 ask_permission(const char *, ...) __attribute__((format(printf, 1, 2)));
 struct notifier_ctx *notify_start(int, const char *, ...)
 	__attribute__((format(printf, 2, 3)));
 void	notify_complete(struct notifier_ctx *, const char *, ...)
 	__attribute__((format(printf, 2, 3)));
 
 #define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))
 #define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))
 #define ROUNDUP(x, y)   ((((x)+((y)-1))/(y))*(y))
 
 typedef void (*sshsig_t)(int);
 sshsig_t ssh_signal(int, sshsig_t);
 
 /* On OpenBSD time_t is int64_t which is long long. */
 /* #define SSH_TIME_T_MAX LLONG_MAX */
 
 #endif /* _MISC_H */
diff --git a/moduli.0 b/moduli.0
index 30776437c7c7..057a018efe33 100644
--- a/moduli.0
+++ b/moduli.0
@@ -1,74 +1,74 @@
 MODULI(5)                     File Formats Manual                    MODULI(5)
 
 NAME
      moduli M-bM-^@M-^S Diffie-Hellman moduli
 
 DESCRIPTION
      The /etc/moduli file contains prime numbers and generators for use by
      sshd(8) in the Diffie-Hellman Group Exchange key exchange method.
 
      New moduli may be generated with ssh-keygen(1) using a two-step process.
      An initial candidate generation pass, using ssh-keygen -M generate,
      calculates numbers that are likely to be useful.  A second primality
      testing pass, using ssh-keygen -M screen, provides a high degree of
      assurance that the numbers are prime and are safe for use in Diffie-
      Hellman operations by sshd(8).  This moduli format is used as the output
      from each pass.
 
      The file consists of newline-separated records, one per modulus,
      containing seven space-separated fields.  These fields are as follows:
 
            timestamp    The time that the modulus was last processed as
                         YYYYMMDDHHMMSS.
 
            type         Decimal number specifying the internal structure of
                         the prime modulus.  Supported types are:
 
                         0     Unknown, not tested.
                         2     "Safe" prime; (p-1)/2 is also prime.
                         4     Sophie Germain; 2p+1 is also prime.
 
                         Moduli candidates initially produced by ssh-keygen(1)
                         are Sophie Germain primes (type 4).  Further primality
                         testing with ssh-keygen(1) produces safe prime moduli
                         (type 2) that are ready for use in sshd(8).  Other
                         types are not used by OpenSSH.
 
            tests        Decimal number indicating the type of primality tests
                         that the number has been subjected to represented as a
                         bitmask of the following values:
 
                         0x00  Not tested.
                         0x01  Composite number M-bM-^@M-^S not prime.
                         0x02  Sieve of Eratosthenes.
                         0x04  Probabilistic Miller-Rabin primality tests.
 
                         The ssh-keygen(1) moduli candidate generation uses the
                         Sieve of Eratosthenes (flag 0x02).  Subsequent
                         ssh-keygen(1) primality tests are Miller-Rabin tests
                         (flag 0x04).
 
            trials       Decimal number indicating the number of primality
                         trials that have been performed on the modulus.
 
            size         Decimal number indicating the size of the prime in
                         bits.
 
            generator    The recommended generator for use with this modulus
                         (hexadecimal).
 
            modulus      The modulus itself in hexadecimal.
 
      When performing Diffie-Hellman Group Exchange, sshd(8) first estimates
      the size of the modulus required to produce enough Diffie-Hellman output
      to sufficiently key the selected symmetric cipher.  sshd(8) then randomly
      selects a modulus from /etc/moduli that best meets the size requirement.
 
 SEE ALSO
      ssh-keygen(1), sshd(8)
 
 STANDARDS
      M. Friedl, N. Provos, and W. Simpson, Diffie-Hellman Group Exchange for
      the Secure Shell (SSH) Transport Layer Protocol, RFC 4419, March 2006.
 
-OpenBSD 7.3                     April 16, 2022                     OpenBSD 7.3
+OpenBSD 7.5                     April 16, 2022                     OpenBSD 7.5
diff --git a/nchan.c b/nchan.c
index d33426fedf91..b156695b27bd 100644
--- a/nchan.c
+++ b/nchan.c
@@ -1,443 +1,443 @@
-/* $OpenBSD: nchan.c,v 1.74 2022/02/01 23:32:51 djm Exp $ */
+/* $OpenBSD: nchan.c,v 1.75 2024/02/01 02:37:33 djm Exp $ */
 /*
  * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/socket.h>
 
 #include <errno.h>
 #include <string.h>
 #include <stdarg.h>
 
 #include "openbsd-compat/sys-queue.h"
 #include "ssh2.h"
 #include "sshbuf.h"
 #include "ssherr.h"
 #include "packet.h"
 #include "channels.h"
 #include "compat.h"
 #include "log.h"
 
 /*
  * SSH Protocol 1.5 aka New Channel Protocol
  * Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored.
  * Written by Markus Friedl in October 1999
  *
  * Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the
  * tear down of channels:
  *
  * 1.3:	strict request-ack-protocol:
  *	CLOSE	->
  *		<-  CLOSE_CONFIRM
  *
  * 1.5:	uses variations of:
  *	IEOF	->
  *		<-  OCLOSE
  *		<-  IEOF
  *	OCLOSE	->
  *	i.e. both sides have to close the channel
  *
  * 2.0: the EOF messages are optional
  *
  * See the debugging output from 'ssh -v' and 'sshd -d' of
  * ssh-1.2.27 as an example.
  *
  */
 
 /* functions manipulating channel states */
 /*
  * EVENTS update channel input/output states execute ACTIONS
  */
 /*
  * ACTIONS: should never update the channel states
  */
 static void	chan_send_eof2(struct ssh *, Channel *);
 static void	chan_send_eow2(struct ssh *, Channel *);
 
 /* helper */
 static void	chan_shutdown_write(struct ssh *, Channel *);
 static void	chan_shutdown_read(struct ssh *, Channel *);
 static void	chan_shutdown_extended_read(struct ssh *, Channel *);
 
 static const char * const ostates[] = {
 	"open", "drain", "wait_ieof", "closed",
 };
 static const char * const istates[] = {
 	"open", "drain", "wait_oclose", "closed",
 };
 
 static void
 chan_set_istate(Channel *c, u_int next)
 {
 	if (c->istate > CHAN_INPUT_CLOSED || next > CHAN_INPUT_CLOSED)
 		fatal("chan_set_istate: bad state %d -> %d", c->istate, next);
 	debug2("channel %d: input %s -> %s", c->self, istates[c->istate],
 	    istates[next]);
 	c->istate = next;
 }
 
 static void
 chan_set_ostate(Channel *c, u_int next)
 {
 	if (c->ostate > CHAN_OUTPUT_CLOSED || next > CHAN_OUTPUT_CLOSED)
 		fatal("chan_set_ostate: bad state %d -> %d", c->ostate, next);
 	debug2("channel %d: output %s -> %s", c->self, ostates[c->ostate],
 	    ostates[next]);
 	c->ostate = next;
 }
 
 void
 chan_read_failed(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: read failed", c->self);
 	switch (c->istate) {
 	case CHAN_INPUT_OPEN:
 		chan_shutdown_read(ssh, c);
 		chan_set_istate(c, CHAN_INPUT_WAIT_DRAIN);
 		break;
 	default:
 		error("channel %d: chan_read_failed for istate %d",
 		    c->self, c->istate);
 		break;
 	}
 }
 
 void
 chan_ibuf_empty(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: ibuf empty", c->self);
 	if (sshbuf_len(c->input)) {
 		error("channel %d: chan_ibuf_empty for non empty buffer",
 		    c->self);
 		return;
 	}
 	switch (c->istate) {
 	case CHAN_INPUT_WAIT_DRAIN:
 		if (!(c->flags & (CHAN_CLOSE_SENT|CHAN_LOCAL)))
 			chan_send_eof2(ssh, c);
 		chan_set_istate(c, CHAN_INPUT_CLOSED);
 		break;
 	default:
 		error("channel %d: chan_ibuf_empty for istate %d",
 		    c->self, c->istate);
 		break;
 	}
 }
 
 void
 chan_obuf_empty(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: obuf empty", c->self);
 	if (sshbuf_len(c->output)) {
 		error("channel %d: chan_obuf_empty for non empty buffer",
 		    c->self);
 		return;
 	}
 	switch (c->ostate) {
 	case CHAN_OUTPUT_WAIT_DRAIN:
 		chan_shutdown_write(ssh, c);
 		chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
 		break;
 	default:
 		error("channel %d: internal error: obuf_empty for ostate %d",
 		    c->self, c->ostate);
 		break;
 	}
 }
 
 void
 chan_rcvd_eow(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: rcvd eow", c->self);
 	switch (c->istate) {
 	case CHAN_INPUT_OPEN:
 		chan_shutdown_read(ssh, c);
 		chan_set_istate(c, CHAN_INPUT_CLOSED);
 		break;
 	}
 }
 
 static void
 chan_send_eof2(struct ssh *ssh, Channel *c)
 {
 	int r;
 
 	debug2("channel %d: send eof", c->self);
 	switch (c->istate) {
 	case CHAN_INPUT_WAIT_DRAIN:
 		if (!c->have_remote_id)
 			fatal_f("channel %d: no remote_id", c->self);
 		if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_EOF)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send CHANNEL_EOF");
 		c->flags |= CHAN_EOF_SENT;
 		break;
 	default:
 		error("channel %d: cannot send eof for istate %d",
 		    c->self, c->istate);
 		break;
 	}
 }
 
 static void
 chan_send_close2(struct ssh *ssh, Channel *c)
 {
 	int r;
 
 	debug2("channel %d: send close", c->self);
 	if (c->ostate != CHAN_OUTPUT_CLOSED ||
 	    c->istate != CHAN_INPUT_CLOSED) {
 		error("channel %d: cannot send close for istate/ostate %d/%d",
 		    c->self, c->istate, c->ostate);
 	} else if (c->flags & CHAN_CLOSE_SENT) {
 		error("channel %d: already sent close", c->self);
 	} else {
 		if (!c->have_remote_id)
 			fatal_f("channel %d: no remote_id", c->self);
 		if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_CLOSE)) != 0 ||
 		    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send CHANNEL_EOF");
 		c->flags |= CHAN_CLOSE_SENT;
 	}
 }
 
 static void
 chan_send_eow2(struct ssh *ssh, Channel *c)
 {
 	int r;
 
 	debug2("channel %d: send eow", c->self);
 	if (c->ostate == CHAN_OUTPUT_CLOSED) {
 		error("channel %d: must not sent eow on closed output",
 		    c->self);
 		return;
 	}
 	if (!(ssh->compat & SSH_NEW_OPENSSH))
 		return;
 	if (!c->have_remote_id)
 		fatal_f("channel %d: no remote_id", c->self);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_REQUEST)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "eow@openssh.com")) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 0)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send CHANNEL_EOF");
 }
 
 /* shared */
 
 void
 chan_rcvd_ieof(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: rcvd eof", c->self);
 	c->flags |= CHAN_EOF_RCVD;
 	if (c->ostate == CHAN_OUTPUT_OPEN)
 		chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
 	if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN &&
 	    sshbuf_len(c->output) == 0 &&
 	    !CHANNEL_EFD_OUTPUT_ACTIVE(c))
 		chan_obuf_empty(ssh, c);
 }
 
 void
 chan_rcvd_oclose(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: rcvd close", c->self);
 	if (!(c->flags & CHAN_LOCAL)) {
 		if (c->flags & CHAN_CLOSE_RCVD)
 			error("channel %d: protocol error: close rcvd twice",
 			    c->self);
 		c->flags |= CHAN_CLOSE_RCVD;
 	}
 	if (c->type == SSH_CHANNEL_LARVAL) {
 		/* tear down larval channels immediately */
 		chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
 		chan_set_istate(c, CHAN_INPUT_CLOSED);
 		return;
 	}
 	switch (c->ostate) {
 	case CHAN_OUTPUT_OPEN:
 		/*
 		 * wait until a data from the channel is consumed if a CLOSE
 		 * is received
 		 */
 		chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
 		break;
 	}
 	switch (c->istate) {
 	case CHAN_INPUT_OPEN:
 		chan_shutdown_read(ssh, c);
 		chan_shutdown_extended_read(ssh, c);
 		chan_set_istate(c, CHAN_INPUT_CLOSED);
 		break;
 	case CHAN_INPUT_WAIT_DRAIN:
 		if (!(c->flags & CHAN_LOCAL))
 			chan_send_eof2(ssh, c);
 		chan_shutdown_extended_read(ssh, c);
 		chan_set_istate(c, CHAN_INPUT_CLOSED);
 		break;
 	}
 }
 
 void
 chan_write_failed(struct ssh *ssh, Channel *c)
 {
 	debug2("channel %d: write failed", c->self);
 	switch (c->ostate) {
 	case CHAN_OUTPUT_OPEN:
 	case CHAN_OUTPUT_WAIT_DRAIN:
 		chan_shutdown_write(ssh, c);
 		if (strcmp(c->ctype, "session") == 0)
 			chan_send_eow2(ssh, c);
 		chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
 		break;
 	default:
 		error("channel %d: chan_write_failed for ostate %d",
 		    c->self, c->ostate);
 		break;
 	}
 }
 
 void
 chan_mark_dead(struct ssh *ssh, Channel *c)
 {
 	c->type = SSH_CHANNEL_ZOMBIE;
 }
 
 int
 chan_is_dead(struct ssh *ssh, Channel *c, int do_send)
 {
 	if (c->type == SSH_CHANNEL_ZOMBIE) {
 		debug2("channel %d: zombie", c->self);
 		return 1;
 	}
 	if (c->istate != CHAN_INPUT_CLOSED || c->ostate != CHAN_OUTPUT_CLOSED)
 		return 0;
 	if ((ssh->compat & SSH_BUG_EXTEOF) &&
 	    c->extended_usage == CHAN_EXTENDED_WRITE &&
 	    c->efd != -1 &&
 	    sshbuf_len(c->extended) > 0) {
 		debug2("channel %d: active efd: %d len %zu",
 		    c->self, c->efd, sshbuf_len(c->extended));
 		return 0;
 	}
 	if (c->flags & CHAN_LOCAL) {
 		debug2("channel %d: is dead (local)", c->self);
 		return 1;
-	}		
+	}
 	if (!(c->flags & CHAN_CLOSE_SENT)) {
 		if (do_send) {
 			chan_send_close2(ssh, c);
 		} else {
 			/* channel would be dead if we sent a close */
 			if (c->flags & CHAN_CLOSE_RCVD) {
 				debug2("channel %d: almost dead",
 				    c->self);
 				return 1;
 			}
 		}
 	}
 	if ((c->flags & CHAN_CLOSE_SENT) &&
 	    (c->flags & CHAN_CLOSE_RCVD)) {
 		debug2("channel %d: is dead", c->self);
 		return 1;
 	}
 	return 0;
 }
 
 /* helper */
 static void
 chan_shutdown_write(struct ssh *ssh, Channel *c)
 {
 	sshbuf_reset(c->output);
 	if (c->type == SSH_CHANNEL_LARVAL)
 		return;
 	/* shutdown failure is allowed if write failed already */
 	debug2_f("channel %d: (i%d o%d sock %d wfd %d efd %d [%s])",
 	    c->self, c->istate, c->ostate, c->sock, c->wfd, c->efd,
 	    channel_format_extended_usage(c));
 	if (c->sock != -1) {
 		if (shutdown(c->sock, SHUT_WR) == -1) {
 			debug2_f("channel %d: shutdown() failed for "
 			    "fd %d [i%d o%d]: %.100s", c->self, c->sock,
 			    c->istate, c->ostate, strerror(errno));
 		}
 	} else {
 		if (channel_close_fd(ssh, c, &c->wfd) < 0) {
 			logit_f("channel %d: close() failed for "
 			    "fd %d [i%d o%d]: %.100s", c->self, c->wfd,
 			    c->istate, c->ostate, strerror(errno));
 		}
 	}
 }
 
 static void
 chan_shutdown_read(struct ssh *ssh, Channel *c)
 {
 	if (c->type == SSH_CHANNEL_LARVAL)
 		return;
 	debug2_f("channel %d: (i%d o%d sock %d wfd %d efd %d [%s])",
 	    c->self, c->istate, c->ostate, c->sock, c->rfd, c->efd,
 	    channel_format_extended_usage(c));
 	if (c->sock != -1) {
 		/*
 		 * shutdown(sock, SHUT_READ) may return ENOTCONN if the
 		 * write side has been closed already. (bug on Linux)
 		 * HP-UX may return ENOTCONN also.
 		 */
 		if (shutdown(c->sock, SHUT_RD) == -1 && errno != ENOTCONN) {
 			error_f("channel %d: shutdown() failed for "
 			    "fd %d [i%d o%d]: %.100s", c->self, c->sock,
 			    c->istate, c->ostate, strerror(errno));
 		}
 	} else {
 		if (channel_close_fd(ssh, c, &c->rfd) < 0) {
 			logit_f("channel %d: close() failed for "
 			    "fd %d [i%d o%d]: %.100s", c->self, c->rfd,
 			    c->istate, c->ostate, strerror(errno));
 		}
 	}
 }
 
 static void
 chan_shutdown_extended_read(struct ssh *ssh, Channel *c)
 {
 	if (c->type == SSH_CHANNEL_LARVAL || c->efd == -1)
 		return;
 	if (c->extended_usage != CHAN_EXTENDED_READ &&
 	    c->extended_usage != CHAN_EXTENDED_IGNORE)
 		return;
 	debug_f("channel %d: (i%d o%d sock %d wfd %d efd %d [%s])",
 	    c->self, c->istate, c->ostate, c->sock, c->rfd, c->efd,
 	    channel_format_extended_usage(c));
 	if (channel_close_fd(ssh, c, &c->efd) < 0) {
 		logit_f("channel %d: close() failed for "
 		    "extended fd %d [i%d o%d]: %.100s", c->self, c->efd,
 		    c->istate, c->ostate, strerror(errno));
 	}
 }
diff --git a/openbsd-compat/getopt.h b/openbsd-compat/getopt.h
index 65c8bc7fb60e..b050fa835f79 100644
--- a/openbsd-compat/getopt.h
+++ b/openbsd-compat/getopt.h
@@ -1,77 +1,85 @@
 /*	$OpenBSD: getopt.h,v 1.2 2008/06/26 05:42:04 ray Exp $	*/
 /*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
 
 /*-
  * Copyright (c) 2000 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Dieter Baron and Thomas Klausner.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef _GETOPT_H_
 #define _GETOPT_H_
 
+#ifndef __THROW
+# if defined __cplusplus
+#  define __THROW throw()
+# else
+#  define __THROW
+# endif
+#endif
+
 /*
  * GNU-like getopt_long() and 4.4BSD getsubopt()/optreset extensions
  */
 #define no_argument        0
 #define required_argument  1
 #define optional_argument  2
 
 #if 0
 struct option {
 	/* name of long option */
 	const char *name;
 	/*
 	 * one of no_argument, required_argument, and optional_argument:
 	 * whether option takes an argument
 	 */
 	int has_arg;
 	/* if not NULL, set *flag to val when option found */
 	int *flag;
 	/* if flag not NULL, value to set *flag to; else return value */
 	int val;
 };
 
 int	 getopt_long(int, char * const *, const char *,
 	    const struct option *, int *);
 int	 getopt_long_only(int, char * const *, const char *,
 	    const struct option *, int *);
 #endif
 
 #ifndef _GETOPT_DEFINED_
 #define _GETOPT_DEFINED_
-int	 getopt(int, char * const *, const char *);
-int	 getsubopt(char **, char * const *, char **);
+int	 getopt(int, char * const *, const char *) __THROW;
+int	 getsubopt(char **, char * const *, char **) __THROW;
 
 extern   char *optarg;                  /* getopt(3) external variables */
 extern   int opterr;
 extern   int optind;
 extern   int optopt;
 extern   int optreset;
 extern   char *suboptarg;               /* getsubopt(3) external variable */
 #endif
  
 #endif /* !_GETOPT_H_ */
diff --git a/openbsd-compat/openbsd-compat.h b/openbsd-compat/openbsd-compat.h
index 78faea9629bd..0823d6a8377f 100644
--- a/openbsd-compat/openbsd-compat.h
+++ b/openbsd-compat/openbsd-compat.h
@@ -1,381 +1,389 @@
 /*
  * Copyright (c) 1999-2003 Damien Miller.  All rights reserved.
  * Copyright (c) 2003 Ben Lindstrom. All rights reserved.
  * Copyright (c) 2002 Tim Rice.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef _OPENBSD_COMPAT_H
 #define _OPENBSD_COMPAT_H
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <pwd.h>
 
 #include <sys/socket.h>
 
 #include <stddef.h>  /* for wchar_t */
 
 /* OpenBSD function replacements */
 #include "base64.h"
 #include "sigact.h"
 #include "readpassphrase.h"
 #include "vis.h"
 #include "getrrsetbyname.h"
 #include "sha1.h"
 #include "sha2.h"
 #include "md5.h"
 #include "blf.h"
 #include "fnmatch.h"
 
+#ifndef __THROW
+# if defined __cplusplus
+#  define __THROW throw()
+# else
+#  define __THROW
+# endif
+#endif
+
 #if defined(HAVE_LOGIN_CAP) && !defined(HAVE_LOGIN_GETPWCLASS)
 # include <login_cap.h>
 # define login_getpwclass(pw) login_getclass(pw->pw_class)
 #endif
 
 #ifndef HAVE_BASENAME
 char *basename(const char *path);
 #endif
 
 #ifndef HAVE_BINDRESVPORT_SA
 int bindresvport_sa(int sd, struct sockaddr *sa);
 #endif
 
 #ifndef HAVE_CLOSEFROM
 void closefrom(int);
 #endif
 
 #if defined(HAVE_DECL_FTRUNCATE) && HAVE_DECL_FTRUNCATE == 0
 int ftruncate(int filedes, off_t length);
 #endif
 
 #ifndef HAVE_GETLINE
 #include <stdio.h>
 ssize_t getline(char **, size_t *, FILE *);
 #endif
 
 #ifndef HAVE_GETPAGESIZE
 int getpagesize(void);
 #endif
 
 #ifndef HAVE_GETCWD
 char *getcwd(char *pt, size_t size);
 #endif
 
 #ifndef HAVE_KILLPG
 int killpg(pid_t, int);
 #endif
 
 #if defined(HAVE_DECL_MEMMEM) && HAVE_DECL_MEMMEM == 0
 void *memmem(const void *, size_t, const void *, size_t);
 #endif
 
 #ifndef HAVE_REALLOCARRAY
 void *reallocarray(void *, size_t, size_t);
 #endif
 
 #ifndef HAVE_RECALLOCARRAY
 void *recallocarray(void *, size_t, size_t, size_t);
 #endif
 
 #ifndef HAVE_RRESVPORT_AF
 int rresvport_af(int *alport, sa_family_t af);
 #endif
 
 #ifndef HAVE_STRLCPY
 size_t strlcpy(char *dst, const char *src, size_t siz);
 #endif
 
 #ifndef HAVE_STRLCAT
 size_t strlcat(char *dst, const char *src, size_t siz);
 #endif
 
 #ifndef HAVE_STRCASESTR
 char *strcasestr(const char *, const char *);
 #endif
 
 #ifndef HAVE_STRNLEN
 size_t strnlen(const char *, size_t);
 #endif
 
 #ifndef HAVE_STRNDUP
 char *strndup(const char *s, size_t n);
 #endif
 
 #ifndef HAVE_SETENV
 int setenv(register const char *name, register const char *value, int rewrite);
 #endif
 
 #ifndef HAVE_STRMODE
 void strmode(int mode, char *p);
 #endif
 
 #ifndef HAVE_STRPTIME
 #include  <time.h>
 char *strptime(const char *buf, const char *fmt, struct tm *tm);
 #endif
 
 #if !defined(HAVE_MKDTEMP)
 int mkstemps(char *path, int slen);
 int mkstemp(char *path);
 char *mkdtemp(char *path);
 #endif
 
 #define mkstemp(x) _ssh_mkstemp(x)
 int _ssh_mkstemp(char *);
 
 #ifndef HAVE_DAEMON
 int daemon(int nochdir, int noclose);
 #endif
 
 #ifndef HAVE_DIRNAME
 char *dirname(const char *path);
 #endif
 
 #ifndef HAVE_FMT_SCALED
 #define	FMT_SCALED_STRSIZE	7
 int	fmt_scaled(long long number, char *result);
 #endif
 
 #ifndef HAVE_SCAN_SCALED
 int	scan_scaled(char *, long long *);
 #endif
 
 #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA)
 char *inet_ntoa(struct in_addr in);
 #endif
 
 #ifndef HAVE_INET_NTOP
 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
 #endif
 
 #ifndef HAVE_INET_ATON
 int inet_aton(const char *cp, struct in_addr *addr);
 #endif
 
 #ifndef HAVE_STRSEP
 char *strsep(char **stringp, const char *delim);
 #endif
 
 #ifndef HAVE_SETPROCTITLE
 void setproctitle(const char *fmt, ...);
 void compat_init_setproctitle(int argc, char *argv[]);
 #endif
 
 #ifndef HAVE_GETGROUPLIST
 int getgrouplist(const char *, gid_t, gid_t *, int *);
 #endif
 
 #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
-int BSDgetopt(int argc, char * const *argv, const char *opts);
+int BSDgetopt(int argc, char * const *argv, const char *opts) __THROW;
 #include "openbsd-compat/getopt.h"
 #endif
 
 #if ((defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0) || \
     (defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0))
 # include <sys/types.h>
 # include <sys/uio.h>
 
 # if defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0
 int readv(int, struct iovec *, int);
 # endif
 
 # if defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0
 int writev(int, struct iovec *, int);
 # endif
 #endif
 
 /* Home grown routines */
 #include "bsd-signal.h"
 #include "bsd-misc.h"
 #include "bsd-setres_id.h"
 #include "bsd-statvfs.h"
 #include "bsd-waitpid.h"
 #include "bsd-poll.h"
 
 #if defined(HAVE_DECL_GETPEEREID) && HAVE_DECL_GETPEEREID == 0
 int getpeereid(int , uid_t *, gid_t *);
 #endif
 
 #ifndef HAVE_ARC4RANDOM
 uint32_t arc4random(void);
 #endif /* !HAVE_ARC4RANDOM */
 
 #ifndef HAVE_ARC4RANDOM_BUF
 void arc4random_buf(void *, size_t);
 #endif
 
 #ifndef HAVE_ARC4RANDOM_STIR
 # define arc4random_stir()
 #endif
 
 #ifndef HAVE_ARC4RANDOM_UNIFORM
 uint32_t arc4random_uniform(uint32_t);
 #endif
 
 #ifndef HAVE_ASPRINTF
 int asprintf(char **, const char *, ...);
 #endif
 
 #ifndef HAVE_OPENPTY
 # include <sys/ioctl.h>	/* for struct winsize */
 int openpty(int *, int *, char *, struct termios *, struct winsize *);
 #endif /* HAVE_OPENPTY */
 
 #ifndef HAVE_SNPRINTF
 int snprintf(char *, size_t, SNPRINTF_CONST char *, ...);
 #endif
 
 #ifndef HAVE_STRTOLL
 long long strtoll(const char *, char **, int);
 #endif
 
 #ifndef HAVE_STRTOUL
 unsigned long strtoul(const char *, char **, int);
 #endif
 
 #ifndef HAVE_STRTOULL
 unsigned long long strtoull(const char *, char **, int);
 #endif
 
 #ifndef HAVE_STRTONUM
 long long strtonum(const char *, long long, long long, const char **);
 #endif
 
 /* multibyte character support */
 #ifndef HAVE_MBLEN
 # define mblen(x, y)	(1)
 #endif
 
 #ifndef HAVE_WCWIDTH
 # define wcwidth(x)	(((x) >= 0x20 && (x) <= 0x7e) ? 1 : -1)
 /* force our no-op nl_langinfo and mbtowc */
 # undef HAVE_NL_LANGINFO
 # undef HAVE_MBTOWC
 # undef HAVE_LANGINFO_H
 #endif
 
 #ifndef HAVE_NL_LANGINFO
 # define nl_langinfo(x)	""
 #endif
 
 #ifndef HAVE_MBTOWC
 int mbtowc(wchar_t *, const char*, size_t);
 #endif
 
 #if !defined(HAVE_VASPRINTF) || !defined(HAVE_VSNPRINTF)
 # include <stdarg.h>
 #endif
 
 /*
  * Some platforms unconditionally undefine va_copy() so we define VA_COPY()
  * instead.  This is known to be the case on at least some configurations of
  * AIX with the xlc compiler.
  */
 #ifndef VA_COPY
 # ifdef HAVE_VA_COPY
 #  define VA_COPY(dest, src) va_copy(dest, src)
 # else
 #  ifdef HAVE___VA_COPY
 #   define VA_COPY(dest, src) __va_copy(dest, src)
 #  else
 #   define VA_COPY(dest, src) (dest) = (src)
 #  endif
 # endif
 #endif
 
 #ifndef HAVE_VASPRINTF
 int vasprintf(char **, const char *, va_list);
 #endif
 
 #ifndef HAVE_VSNPRINTF
 int vsnprintf(char *, size_t, const char *, va_list);
 #endif
 
 #ifndef HAVE_USER_FROM_UID
 char *user_from_uid(uid_t, int);
 #endif
 
 #ifndef HAVE_GROUP_FROM_GID
 char *group_from_gid(gid_t, int);
 #endif
 
 #ifndef HAVE_TIMINGSAFE_BCMP
 int timingsafe_bcmp(const void *, const void *, size_t);
 #endif
 
 #ifndef HAVE_BCRYPT_PBKDF
 int	bcrypt_pbkdf(const char *, size_t, const uint8_t *, size_t,
     uint8_t *, size_t, unsigned int);
 #endif
 
 #ifndef HAVE_EXPLICIT_BZERO
 void explicit_bzero(void *p, size_t n);
 #endif
 
 #ifndef HAVE_FREEZERO
 void freezero(void *, size_t);
 #endif
 
 #ifndef HAVE_LOCALTIME_R
 struct tm *localtime_r(const time_t *, struct tm *);
 #endif
 
 #ifndef HAVE_TIMEGM
 #include <time.h>
 time_t timegm(struct tm *);
 #endif
 
 char *xcrypt(const char *password, const char *salt);
 char *shadow_pw(struct passwd *pw);
 
 /* rfc2553 socket API replacements */
 #include "fake-rfc2553.h"
 
 /* Routines for a single OS platform */
 #include "bsd-cygwin_util.h"
 
 #include "port-aix.h"
 #include "port-irix.h"
 #include "port-linux.h"
 #include "port-solaris.h"
 #include "port-net.h"
 #include "port-uw.h"
 
 /* _FORTIFY_SOURCE breaks FD_ISSET(n)/FD_SET(n) for n > FD_SETSIZE. Avoid. */
 #if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
 # include <features.h>
 # if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
 #  if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
 #   include <sys/socket.h>  /* Ensure include guard is defined */
 #   undef FD_SET
 #   undef FD_ISSET
 #   define FD_SET(n, set)	kludge_FD_SET(n, set)
 #   define FD_ISSET(n, set)	kludge_FD_ISSET(n, set)
 void kludge_FD_SET(int, fd_set *);
 int kludge_FD_ISSET(int, fd_set *);
 #  endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
 # endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
 #endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */
 
 #endif /* _OPENBSD_COMPAT_H */
diff --git a/readconf.c b/readconf.c
index a2282b562df0..3a64a0441641 100644
--- a/readconf.c
+++ b/readconf.c
@@ -1,3684 +1,3723 @@
-/* $OpenBSD: readconf.c,v 1.383 2023/10/12 02:18:18 djm Exp $ */
+/* $OpenBSD: readconf.c,v 1.386 2024/03/04 04:13:18 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Functions for reading the configuration files.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include <sys/un.h>
 
 #include <net/if.h>
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <arpa/inet.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #ifdef HAVE_IFADDRS_H
 # include <ifaddrs.h>
 #endif
 #include <limits.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #include <pwd.h>
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdarg.h>
 #include <unistd.h>
 #ifdef USE_SYSTEM_GLOB
 # include <glob.h>
 #else
 # include "openbsd-compat/glob.h"
 #endif
 #ifdef HAVE_UTIL_H
 #include <util.h>
 #endif
 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
 # include <vis.h>
 #endif
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssherr.h"
 #include "cipher.h"
 #include "pathnames.h"
 #include "log.h"
 #include "sshkey.h"
 #include "misc.h"
 #include "readconf.h"
 #include "match.h"
 #include "kex.h"
 #include "mac.h"
 #include "uidswap.h"
 #include "myproposal.h"
 #include "digest.h"
 
 /* Format of the configuration file:
 
    # Configuration data is parsed as follows:
    #  1. command line options
    #  2. user-specific file
    #  3. system-wide file
    # Any configuration value is only changed the first time it is set.
    # Thus, host-specific definitions should be at the beginning of the
    # configuration file, and defaults at the end.
 
    # Host-specific declarations.  These may override anything above.  A single
    # host may match multiple declarations; these are processed in the order
    # that they are given in.
 
    Host *.ngs.fi ngs.fi
      User foo
 
    Host fake.com
      Hostname another.host.name.real.org
      User blaah
      Port 34289
      ForwardX11 no
      ForwardAgent no
 
    Host books.com
      RemoteForward 9999 shadows.cs.hut.fi:9999
      Ciphers 3des-cbc
 
    Host fascist.blob.com
      Port 23123
      User tylonen
      PasswordAuthentication no
 
    Host puukko.hut.fi
      User t35124p
      ProxyCommand ssh-proxy %h %p
 
    Host *.fr
      PublicKeyAuthentication no
 
    Host *.su
      Ciphers aes128-ctr
      PasswordAuthentication no
 
    Host vpn.fake.com
      Tunnel yes
      TunnelDevice 3
 
    # Defaults for various options
    Host *
      ForwardAgent no
      ForwardX11 no
      PasswordAuthentication yes
      StrictHostKeyChecking yes
      TcpKeepAlive no
      IdentityFile ~/.ssh/identity
      Port 22
      EscapeChar ~
 
 */
 
 static int read_config_file_depth(const char *filename, struct passwd *pw,
     const char *host, const char *original_host, Options *options,
     int flags, int *activep, int *want_final_pass, int depth);
 static int process_config_line_depth(Options *options, struct passwd *pw,
     const char *host, const char *original_host, char *line,
     const char *filename, int linenum, int *activep, int flags,
     int *want_final_pass, int depth);
 
 /* Keyword tokens. */
 
 typedef enum {
 	oBadOption,
 	oHost, oMatch, oInclude, oTag,
 	oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
 	oGatewayPorts, oExitOnForwardFailure,
 	oPasswordAuthentication,
 	oXAuthLocation,
 	oIdentityFile, oHostname, oPort, oRemoteForward, oLocalForward,
 	oPermitRemoteOpen,
 	oCertificateFile, oAddKeysToAgent, oIdentityAgent,
 	oUser, oEscapeChar, oProxyCommand,
 	oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
 	oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
 	oTCPKeepAlive, oNumberOfPasswordPrompts,
 	oLogFacility, oLogLevel, oLogVerbose, oCiphers, oMacs,
 	oPubkeyAuthentication,
 	oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
 	oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
 	oHostKeyAlgorithms, oBindAddress, oBindInterface, oPKCS11Provider,
 	oClearAllForwardings, oNoHostAuthenticationForLocalhost,
 	oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
 	oAddressFamily, oGssAuthentication, oGssDelegateCreds,
 	oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
 	oSendEnv, oSetEnv, oControlPath, oControlMaster, oControlPersist,
 	oHashKnownHosts,
 	oTunnel, oTunnelDevice,
 	oLocalCommand, oPermitLocalCommand, oRemoteCommand,
 	oVisualHostKey,
 	oKexAlgorithms, oIPQoS, oRequestTTY, oSessionType, oStdinNull,
 	oForkAfterAuthentication, oIgnoreUnknown, oProxyUseFdpass,
 	oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
 	oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
 	oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
 	oFingerprintHash, oUpdateHostkeys, oHostbasedAcceptedAlgorithms,
 	oPubkeyAcceptedAlgorithms, oCASignatureAlgorithms, oProxyJump,
 	oSecurityKeyProvider, oKnownHostsCommand, oRequiredRSASize,
 	oEnableEscapeCommandline, oObscureKeystrokeTiming, oChannelTimeout,
 	oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
 } OpCodes;
 
 /* Textual representations of the tokens. */
 
 static struct {
 	const char *name;
 	OpCodes opcode;
 } keywords[] = {
 	/* Deprecated options */
 	{ "protocol", oIgnore }, /* NB. silently ignored */
 	{ "cipher", oDeprecated },
 	{ "fallbacktorsh", oDeprecated },
 	{ "globalknownhostsfile2", oDeprecated },
 	{ "rhostsauthentication", oDeprecated },
 	{ "userknownhostsfile2", oDeprecated },
 	{ "useroaming", oDeprecated },
 	{ "usersh", oDeprecated },
 	{ "useprivilegedport", oDeprecated },
 
 	/* Unsupported options */
 	{ "afstokenpassing", oUnsupported },
 	{ "kerberosauthentication", oUnsupported },
 	{ "kerberostgtpassing", oUnsupported },
 	{ "rsaauthentication", oUnsupported },
 	{ "rhostsrsaauthentication", oUnsupported },
 	{ "compressionlevel", oUnsupported },
 
 	/* Sometimes-unsupported options */
 #if defined(GSSAPI)
 	{ "gssapiauthentication", oGssAuthentication },
 	{ "gssapidelegatecredentials", oGssDelegateCreds },
 # else
 	{ "gssapiauthentication", oUnsupported },
 	{ "gssapidelegatecredentials", oUnsupported },
 #endif
 #ifdef ENABLE_PKCS11
 	{ "pkcs11provider", oPKCS11Provider },
 	{ "smartcarddevice", oPKCS11Provider },
 # else
 	{ "smartcarddevice", oUnsupported },
 	{ "pkcs11provider", oUnsupported },
 #endif
 
 	{ "forwardagent", oForwardAgent },
 	{ "forwardx11", oForwardX11 },
 	{ "forwardx11trusted", oForwardX11Trusted },
 	{ "forwardx11timeout", oForwardX11Timeout },
 	{ "exitonforwardfailure", oExitOnForwardFailure },
 	{ "xauthlocation", oXAuthLocation },
 	{ "gatewayports", oGatewayPorts },
 	{ "passwordauthentication", oPasswordAuthentication },
 	{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
 	{ "kbdinteractivedevices", oKbdInteractiveDevices },
 	{ "challengeresponseauthentication", oKbdInteractiveAuthentication }, /* alias */
 	{ "skeyauthentication", oKbdInteractiveAuthentication }, /* alias */
 	{ "tisauthentication", oKbdInteractiveAuthentication },  /* alias */
 	{ "pubkeyauthentication", oPubkeyAuthentication },
 	{ "dsaauthentication", oPubkeyAuthentication },		    /* alias */
 	{ "hostbasedauthentication", oHostbasedAuthentication },
 	{ "identityfile", oIdentityFile },
 	{ "identityfile2", oIdentityFile },			/* obsolete */
 	{ "identitiesonly", oIdentitiesOnly },
 	{ "certificatefile", oCertificateFile },
 	{ "addkeystoagent", oAddKeysToAgent },
 	{ "identityagent", oIdentityAgent },
 	{ "hostname", oHostname },
 	{ "hostkeyalias", oHostKeyAlias },
 	{ "proxycommand", oProxyCommand },
 	{ "port", oPort },
 	{ "ciphers", oCiphers },
 	{ "macs", oMacs },
 	{ "remoteforward", oRemoteForward },
 	{ "localforward", oLocalForward },
 	{ "permitremoteopen", oPermitRemoteOpen },
 	{ "user", oUser },
 	{ "host", oHost },
 	{ "match", oMatch },
 	{ "tag", oTag },
 	{ "escapechar", oEscapeChar },
 	{ "globalknownhostsfile", oGlobalKnownHostsFile },
 	{ "userknownhostsfile", oUserKnownHostsFile },
 	{ "connectionattempts", oConnectionAttempts },
 	{ "batchmode", oBatchMode },
 	{ "checkhostip", oCheckHostIP },
 	{ "stricthostkeychecking", oStrictHostKeyChecking },
 	{ "compression", oCompression },
 	{ "tcpkeepalive", oTCPKeepAlive },
 	{ "keepalive", oTCPKeepAlive },				/* obsolete */
 	{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
 	{ "syslogfacility", oLogFacility },
 	{ "loglevel", oLogLevel },
 	{ "logverbose", oLogVerbose },
 	{ "dynamicforward", oDynamicForward },
 	{ "preferredauthentications", oPreferredAuthentications },
 	{ "hostkeyalgorithms", oHostKeyAlgorithms },
 	{ "casignaturealgorithms", oCASignatureAlgorithms },
 	{ "bindaddress", oBindAddress },
 	{ "bindinterface", oBindInterface },
 	{ "clearallforwardings", oClearAllForwardings },
 	{ "enablesshkeysign", oEnableSSHKeysign },
 	{ "verifyhostkeydns", oVerifyHostKeyDNS },
 	{ "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
 	{ "rekeylimit", oRekeyLimit },
 	{ "connecttimeout", oConnectTimeout },
 	{ "addressfamily", oAddressFamily },
 	{ "serveraliveinterval", oServerAliveInterval },
 	{ "serveralivecountmax", oServerAliveCountMax },
 	{ "sendenv", oSendEnv },
 	{ "setenv", oSetEnv },
 	{ "controlpath", oControlPath },
 	{ "controlmaster", oControlMaster },
 	{ "controlpersist", oControlPersist },
 	{ "hashknownhosts", oHashKnownHosts },
 	{ "include", oInclude },
 	{ "tunnel", oTunnel },
 	{ "tunneldevice", oTunnelDevice },
 	{ "localcommand", oLocalCommand },
 	{ "permitlocalcommand", oPermitLocalCommand },
 	{ "remotecommand", oRemoteCommand },
 	{ "visualhostkey", oVisualHostKey },
 	{ "kexalgorithms", oKexAlgorithms },
 	{ "ipqos", oIPQoS },
 	{ "requesttty", oRequestTTY },
 	{ "sessiontype", oSessionType },
 	{ "stdinnull", oStdinNull },
 	{ "forkafterauthentication", oForkAfterAuthentication },
 	{ "proxyusefdpass", oProxyUseFdpass },
 	{ "canonicaldomains", oCanonicalDomains },
 	{ "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
 	{ "canonicalizehostname", oCanonicalizeHostname },
 	{ "canonicalizemaxdots", oCanonicalizeMaxDots },
 	{ "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
 	{ "streamlocalbindmask", oStreamLocalBindMask },
 	{ "streamlocalbindunlink", oStreamLocalBindUnlink },
 	{ "revokedhostkeys", oRevokedHostKeys },
 	{ "fingerprinthash", oFingerprintHash },
 	{ "updatehostkeys", oUpdateHostkeys },
 	{ "hostbasedacceptedalgorithms", oHostbasedAcceptedAlgorithms },
 	{ "hostbasedkeytypes", oHostbasedAcceptedAlgorithms }, /* obsolete */
 	{ "pubkeyacceptedalgorithms", oPubkeyAcceptedAlgorithms },
 	{ "pubkeyacceptedkeytypes", oPubkeyAcceptedAlgorithms }, /* obsolete */
 	{ "ignoreunknown", oIgnoreUnknown },
 	{ "proxyjump", oProxyJump },
 	{ "securitykeyprovider", oSecurityKeyProvider },
 	{ "knownhostscommand", oKnownHostsCommand },
 	{ "requiredrsasize", oRequiredRSASize },
 	{ "enableescapecommandline", oEnableEscapeCommandline },
 	{ "obscurekeystroketiming", oObscureKeystrokeTiming },
 	{ "channeltimeout", oChannelTimeout },
 
 	{ NULL, oBadOption }
 };
 
 static const char *lookup_opcode_name(OpCodes code);
 
 const char *
 kex_default_pk_alg(void)
 {
 	static char *pkalgs;
 
 	if (pkalgs == NULL) {
 		char *all_key;
 
 		all_key = sshkey_alg_list(0, 0, 1, ',');
 		pkalgs = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
 		free(all_key);
 	}
 	return pkalgs;
 }
 
 char *
 ssh_connection_hash(const char *thishost, const char *host, const char *portstr,
     const char *user, const char *jumphost)
 {
 	struct ssh_digest_ctx *md;
 	u_char conn_hash[SSH_DIGEST_MAX_LENGTH];
 
 	if ((md = ssh_digest_start(SSH_DIGEST_SHA1)) == NULL ||
 	    ssh_digest_update(md, thishost, strlen(thishost)) < 0 ||
 	    ssh_digest_update(md, host, strlen(host)) < 0 ||
 	    ssh_digest_update(md, portstr, strlen(portstr)) < 0 ||
 	    ssh_digest_update(md, user, strlen(user)) < 0 ||
 	    ssh_digest_update(md, jumphost, strlen(jumphost)) < 0 ||
 	    ssh_digest_final(md, conn_hash, sizeof(conn_hash)) < 0)
 		fatal_f("mux digest failed");
 	ssh_digest_free(md);
 	return tohex(conn_hash, ssh_digest_bytes(SSH_DIGEST_SHA1));
 }
 
 /*
  * Adds a local TCP/IP port forward to options.  Never returns if there is an
  * error.
  */
 
 void
 add_local_forward(Options *options, const struct Forward *newfwd)
 {
 	struct Forward *fwd;
 	int i;
 
 	/* Don't add duplicates */
 	for (i = 0; i < options->num_local_forwards; i++) {
 		if (forward_equals(newfwd, options->local_forwards + i))
 			return;
 	}
 	options->local_forwards = xreallocarray(options->local_forwards,
 	    options->num_local_forwards + 1,
 	    sizeof(*options->local_forwards));
 	fwd = &options->local_forwards[options->num_local_forwards++];
 
 	fwd->listen_host = newfwd->listen_host;
 	fwd->listen_port = newfwd->listen_port;
 	fwd->listen_path = newfwd->listen_path;
 	fwd->connect_host = newfwd->connect_host;
 	fwd->connect_port = newfwd->connect_port;
 	fwd->connect_path = newfwd->connect_path;
 }
 
 /*
  * Adds a remote TCP/IP port forward to options.  Never returns if there is
  * an error.
  */
 
 void
 add_remote_forward(Options *options, const struct Forward *newfwd)
 {
 	struct Forward *fwd;
 	int i;
 
 	/* Don't add duplicates */
 	for (i = 0; i < options->num_remote_forwards; i++) {
 		if (forward_equals(newfwd, options->remote_forwards + i))
 			return;
 	}
 	options->remote_forwards = xreallocarray(options->remote_forwards,
 	    options->num_remote_forwards + 1,
 	    sizeof(*options->remote_forwards));
 	fwd = &options->remote_forwards[options->num_remote_forwards++];
 
 	fwd->listen_host = newfwd->listen_host;
 	fwd->listen_port = newfwd->listen_port;
 	fwd->listen_path = newfwd->listen_path;
 	fwd->connect_host = newfwd->connect_host;
 	fwd->connect_port = newfwd->connect_port;
 	fwd->connect_path = newfwd->connect_path;
 	fwd->handle = newfwd->handle;
 	fwd->allocated_port = 0;
 }
 
 static void
 clear_forwardings(Options *options)
 {
 	int i;
 
 	for (i = 0; i < options->num_local_forwards; i++) {
 		free(options->local_forwards[i].listen_host);
 		free(options->local_forwards[i].listen_path);
 		free(options->local_forwards[i].connect_host);
 		free(options->local_forwards[i].connect_path);
 	}
 	if (options->num_local_forwards > 0) {
 		free(options->local_forwards);
 		options->local_forwards = NULL;
 	}
 	options->num_local_forwards = 0;
 	for (i = 0; i < options->num_remote_forwards; i++) {
 		free(options->remote_forwards[i].listen_host);
 		free(options->remote_forwards[i].listen_path);
 		free(options->remote_forwards[i].connect_host);
 		free(options->remote_forwards[i].connect_path);
 	}
 	if (options->num_remote_forwards > 0) {
 		free(options->remote_forwards);
 		options->remote_forwards = NULL;
 	}
 	options->num_remote_forwards = 0;
 	options->tun_open = SSH_TUNMODE_NO;
 }
 
 void
 add_certificate_file(Options *options, const char *path, int userprovided)
 {
 	int i;
 
 	if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
 		fatal("Too many certificate files specified (max %d)",
 		    SSH_MAX_CERTIFICATE_FILES);
 
 	/* Avoid registering duplicates */
 	for (i = 0; i < options->num_certificate_files; i++) {
 		if (options->certificate_file_userprovided[i] == userprovided &&
 		    strcmp(options->certificate_files[i], path) == 0) {
 			debug2_f("ignoring duplicate key %s", path);
 			return;
 		}
 	}
 
 	options->certificate_file_userprovided[options->num_certificate_files] =
 	    userprovided;
 	options->certificate_files[options->num_certificate_files++] =
 	    xstrdup(path);
 }
 
 void
 add_identity_file(Options *options, const char *dir, const char *filename,
     int userprovided)
 {
 	char *path;
 	int i;
 
 	if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
 		fatal("Too many identity files specified (max %d)",
 		    SSH_MAX_IDENTITY_FILES);
 
 	if (dir == NULL) /* no dir, filename is absolute */
 		path = xstrdup(filename);
 	else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
 		fatal("Identity file path %s too long", path);
 
 	/* Avoid registering duplicates */
 	for (i = 0; i < options->num_identity_files; i++) {
 		if (options->identity_file_userprovided[i] == userprovided &&
 		    strcmp(options->identity_files[i], path) == 0) {
 			debug2_f("ignoring duplicate key %s", path);
 			free(path);
 			return;
 		}
 	}
 
 	options->identity_file_userprovided[options->num_identity_files] =
 	    userprovided;
 	options->identity_files[options->num_identity_files++] = path;
 }
 
 int
 default_ssh_port(void)
 {
 	static int port;
 	struct servent *sp;
 
 	if (port == 0) {
 		sp = getservbyname(SSH_SERVICE_NAME, "tcp");
 		port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
 	}
 	return port;
 }
 
 /*
  * Execute a command in a shell.
  * Return its exit status or -1 on abnormal exit.
  */
 static int
 execute_in_shell(const char *cmd)
 {
 	char *shell;
 	pid_t pid;
 	int status;
 
 	if ((shell = getenv("SHELL")) == NULL)
 		shell = _PATH_BSHELL;
 
 	if (access(shell, X_OK) == -1) {
 		fatal("Shell \"%s\" is not executable: %s",
 		    shell, strerror(errno));
 	}
 
 	debug("Executing command: '%.500s'", cmd);
 
 	/* Fork and execute the command. */
 	if ((pid = fork()) == 0) {
 		char *argv[4];
 
 		if (stdfd_devnull(1, 1, 0) == -1)
 			fatal_f("stdfd_devnull failed");
 		closefrom(STDERR_FILENO + 1);
 
 		argv[0] = shell;
 		argv[1] = "-c";
 		argv[2] = xstrdup(cmd);
 		argv[3] = NULL;
 
 		execv(argv[0], argv);
 		error("Unable to execute '%.100s': %s", cmd, strerror(errno));
 		/* Die with signal to make this error apparent to parent. */
 		ssh_signal(SIGTERM, SIG_DFL);
 		kill(getpid(), SIGTERM);
 		_exit(1);
 	}
 	/* Parent. */
 	if (pid == -1)
 		fatal_f("fork: %.100s", strerror(errno));
 
 	while (waitpid(pid, &status, 0) == -1) {
 		if (errno != EINTR && errno != EAGAIN)
 			fatal_f("waitpid: %s", strerror(errno));
 	}
 	if (!WIFEXITED(status)) {
 		error("command '%.100s' exited abnormally", cmd);
 		return -1;
 	}
 	debug3("command returned status %d", WEXITSTATUS(status));
 	return WEXITSTATUS(status);
 }
 
 /*
  * Check whether a local network interface address appears in CIDR pattern-
  * list 'addrlist'. Returns 1 if matched or 0 otherwise.
  */
 static int
 check_match_ifaddrs(const char *addrlist)
 {
 #ifdef HAVE_IFADDRS_H
 	struct ifaddrs *ifa, *ifaddrs = NULL;
 	int r, found = 0;
 	char addr[NI_MAXHOST];
 	socklen_t salen;
 
 	if (getifaddrs(&ifaddrs) != 0) {
 		error("match localnetwork: getifaddrs failed: %s",
 		    strerror(errno));
 		return 0;
 	}
 	for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
 		if (ifa->ifa_addr == NULL || ifa->ifa_name == NULL ||
 		    (ifa->ifa_flags & IFF_UP) == 0)
 			continue;
 		switch (ifa->ifa_addr->sa_family) {
 		case AF_INET:
 			salen = sizeof(struct sockaddr_in);
 			break;
 		case AF_INET6:
 			salen = sizeof(struct sockaddr_in6);
 			break;
 #ifdef AF_LINK
 		case AF_LINK:
 			/* ignore */
 			continue;
 #endif /* AF_LINK */
 		default:
 			debug2_f("interface %s: unsupported address family %d",
 			    ifa->ifa_name, ifa->ifa_addr->sa_family);
 			continue;
 		}
 		if ((r = getnameinfo(ifa->ifa_addr, salen, addr, sizeof(addr),
 		    NULL, 0, NI_NUMERICHOST)) != 0) {
 			debug2_f("interface %s getnameinfo failed: %s",
 			    ifa->ifa_name, gai_strerror(r));
 			continue;
 		}
 		debug3_f("interface %s addr %s", ifa->ifa_name, addr);
 		if (addr_match_cidr_list(addr, addrlist) == 1) {
 			debug3_f("matched interface %s: address %s in %s",
 			    ifa->ifa_name, addr, addrlist);
 			found = 1;
 			break;
 		}
 	}
 	freeifaddrs(ifaddrs);
 	return found;
 #else /* HAVE_IFADDRS_H */
 	error("match localnetwork: not supported on this platform");
 	return 0;
 #endif /* HAVE_IFADDRS_H */
 }
 
 /*
  * Parse and execute a Match directive.
  */
 static int
 match_cfg_line(Options *options, char **condition, struct passwd *pw,
     const char *host_arg, const char *original_host, int final_pass,
     int *want_final_pass, const char *filename, int linenum)
 {
 	char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
 	const char *ruser;
 	int r, port, this_result, result = 1, attributes = 0, negate;
 	char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
 	char uidstr[32];
 
 	/*
 	 * Configuration is likely to be incomplete at this point so we
 	 * must be prepared to use default values.
 	 */
 	port = options->port <= 0 ? default_ssh_port() : options->port;
 	ruser = options->user == NULL ? pw->pw_name : options->user;
 	if (final_pass) {
 		host = xstrdup(options->hostname);
 	} else if (options->hostname != NULL) {
 		/* NB. Please keep in sync with ssh.c:main() */
 		host = percent_expand(options->hostname,
 		    "h", host_arg, (char *)NULL);
 	} else {
 		host = xstrdup(host_arg);
 	}
 
 	debug2("checking match for '%s' host %s originally %s",
 	    cp, host, original_host);
 	while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
 		/* Terminate on comment */
 		if (*attrib == '#') {
 			cp = NULL; /* mark all arguments consumed */
 			break;
 		}
 		arg = criteria = NULL;
 		this_result = 1;
 		if ((negate = (attrib[0] == '!')))
 			attrib++;
 		/* Criterion "all" has no argument and must appear alone */
 		if (strcasecmp(attrib, "all") == 0) {
 			if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
 			    *arg != '\0' && *arg != '#')) {
 				error("%.200s line %d: '%s' cannot be combined "
 				    "with other Match attributes",
 				    filename, linenum, oattrib);
 				result = -1;
 				goto out;
 			}
 			if (arg != NULL && *arg == '#')
 				cp = NULL; /* mark all arguments consumed */
 			if (result)
 				result = negate ? 0 : 1;
 			goto out;
 		}
 		attributes++;
 		/* criteria "final" and "canonical" have no argument */
 		if (strcasecmp(attrib, "canonical") == 0 ||
 		    strcasecmp(attrib, "final") == 0) {
 			/*
 			 * If the config requests "Match final" then remember
 			 * this so we can perform a second pass later.
 			 */
 			if (strcasecmp(attrib, "final") == 0 &&
 			    want_final_pass != NULL)
 				*want_final_pass = 1;
 			r = !!final_pass;  /* force bitmask member to boolean */
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 			debug3("%.200s line %d: %smatched '%s'",
 			    filename, linenum,
 			    this_result ? "" : "not ", oattrib);
 			continue;
 		}
 		/* All other criteria require an argument */
 		if ((arg = strdelim(&cp)) == NULL ||
 		    *arg == '\0' || *arg == '#') {
 			error("Missing Match criteria for %s", attrib);
 			result = -1;
 			goto out;
 		}
 		if (strcasecmp(attrib, "host") == 0) {
 			criteria = xstrdup(host);
 			r = match_hostname(host, arg) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "originalhost") == 0) {
 			criteria = xstrdup(original_host);
 			r = match_hostname(original_host, arg) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "user") == 0) {
 			criteria = xstrdup(ruser);
 			r = match_pattern_list(ruser, arg, 0) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "localuser") == 0) {
 			criteria = xstrdup(pw->pw_name);
 			r = match_pattern_list(pw->pw_name, arg, 0) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "localnetwork") == 0) {
 			if (addr_match_cidr_list(NULL, arg) == -1) {
 				/* Error already printed */
 				result = -1;
 				goto out;
 			}
 			r = check_match_ifaddrs(arg) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "tagged") == 0) {
 			criteria = xstrdup(options->tag == NULL ? "" :
 			    options->tag);
 			r = match_pattern_list(criteria, arg, 0) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "exec") == 0) {
 			char *conn_hash_hex, *keyalias, *jmphost;
 
 			if (gethostname(thishost, sizeof(thishost)) == -1)
 				fatal("gethostname: %s", strerror(errno));
 			jmphost = option_clear_or_none(options->jump_host) ?
 			    "" : options->jump_host;
 			strlcpy(shorthost, thishost, sizeof(shorthost));
 			shorthost[strcspn(thishost, ".")] = '\0';
 			snprintf(portstr, sizeof(portstr), "%d", port);
 			snprintf(uidstr, sizeof(uidstr), "%llu",
 			    (unsigned long long)pw->pw_uid);
 			conn_hash_hex = ssh_connection_hash(thishost, host,
 			    portstr, ruser, jmphost);
 			keyalias = options->host_key_alias ?
 			    options->host_key_alias : host;
 
 			cmd = percent_expand(arg,
 			    "C", conn_hash_hex,
 			    "L", shorthost,
 			    "d", pw->pw_dir,
 			    "h", host,
 			    "k", keyalias,
 			    "l", thishost,
 			    "n", original_host,
 			    "p", portstr,
 			    "r", ruser,
 			    "u", pw->pw_name,
 			    "i", uidstr,
 			    "j", jmphost,
 			    (char *)NULL);
 			free(conn_hash_hex);
 			if (result != 1) {
 				/* skip execution if prior predicate failed */
 				debug3("%.200s line %d: skipped exec "
 				    "\"%.100s\"", filename, linenum, cmd);
 				free(cmd);
 				continue;
 			}
 			r = execute_in_shell(cmd);
 			if (r == -1) {
 				fatal("%.200s line %d: match exec "
 				    "'%.100s' error", filename,
 				    linenum, cmd);
 			}
 			criteria = xstrdup(cmd);
 			free(cmd);
 			/* Force exit status to boolean */
 			r = r == 0;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else {
 			error("Unsupported Match attribute %s", attrib);
 			result = -1;
 			goto out;
 		}
 		debug3("%.200s line %d: %smatched '%s%s%.100s%s' ",
 		    filename, linenum, this_result ? "": "not ", oattrib,
 		    criteria == NULL ? "" : " \"",
 		    criteria == NULL ? "" : criteria,
 		    criteria == NULL ? "" : "\"");
 		free(criteria);
 	}
 	if (attributes == 0) {
 		error("One or more attributes required for Match");
 		result = -1;
 		goto out;
 	}
  out:
 	if (result != -1)
 		debug2("match %sfound", result ? "" : "not ");
 	*condition = cp;
 	free(host);
 	return result;
 }
 
 /* Remove environment variable by pattern */
 static void
 rm_env(Options *options, const char *arg, const char *filename, int linenum)
 {
 	u_int i, j, onum_send_env = options->num_send_env;
 
 	/* Remove an environment variable */
 	for (i = 0; i < options->num_send_env; ) {
 		if (!match_pattern(options->send_env[i], arg + 1)) {
 			i++;
 			continue;
 		}
 		debug3("%s line %d: removing environment %s",
 		    filename, linenum, options->send_env[i]);
 		free(options->send_env[i]);
 		options->send_env[i] = NULL;
 		for (j = i; j < options->num_send_env - 1; j++) {
 			options->send_env[j] = options->send_env[j + 1];
 			options->send_env[j + 1] = NULL;
 		}
 		options->num_send_env--;
 		/* NB. don't increment i */
 	}
 	if (onum_send_env != options->num_send_env) {
 		options->send_env = xrecallocarray(options->send_env,
 		    onum_send_env, options->num_send_env,
 		    sizeof(*options->send_env));
 	}
 }
 
 /*
  * Returns the number of the token pointed to by cp or oBadOption.
  */
 static OpCodes
 parse_token(const char *cp, const char *filename, int linenum,
     const char *ignored_unknown)
 {
 	int i;
 
 	for (i = 0; keywords[i].name; i++)
 		if (strcmp(cp, keywords[i].name) == 0)
 			return keywords[i].opcode;
 	if (ignored_unknown != NULL &&
 	    match_pattern_list(cp, ignored_unknown, 1) == 1)
 		return oIgnoredUnknownOption;
 	error("%s: line %d: Bad configuration option: %s",
 	    filename, linenum, cp);
 	return oBadOption;
 }
 
+static void
+free_canon_cnames(struct allowed_cname *cnames, u_int n)
+{
+	u_int i;
+
+	if (cnames == NULL || n == 0)
+		return;
+	for (i = 0; i < n; i++) {
+		free(cnames[i].source_list);
+		free(cnames[i].target_list);
+	}
+	free(cnames);
+}
+
 /* Multistate option parsing */
 struct multistate {
 	char *key;
 	int value;
 };
 static const struct multistate multistate_flag[] = {
 	{ "true",			1 },
 	{ "false",			0 },
 	{ "yes",			1 },
 	{ "no",				0 },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_yesnoask[] = {
 	{ "true",			1 },
 	{ "false",			0 },
 	{ "yes",			1 },
 	{ "no",				0 },
 	{ "ask",			2 },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_strict_hostkey[] = {
 	{ "true",			SSH_STRICT_HOSTKEY_YES },
 	{ "false",			SSH_STRICT_HOSTKEY_OFF },
 	{ "yes",			SSH_STRICT_HOSTKEY_YES },
 	{ "no",				SSH_STRICT_HOSTKEY_OFF },
 	{ "ask",			SSH_STRICT_HOSTKEY_ASK },
 	{ "off",			SSH_STRICT_HOSTKEY_OFF },
 	{ "accept-new",			SSH_STRICT_HOSTKEY_NEW },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_yesnoaskconfirm[] = {
 	{ "true",			1 },
 	{ "false",			0 },
 	{ "yes",			1 },
 	{ "no",				0 },
 	{ "ask",			2 },
 	{ "confirm",			3 },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_addressfamily[] = {
 	{ "inet",			AF_INET },
 	{ "inet6",			AF_INET6 },
 	{ "any",			AF_UNSPEC },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_controlmaster[] = {
 	{ "true",			SSHCTL_MASTER_YES },
 	{ "yes",			SSHCTL_MASTER_YES },
 	{ "false",			SSHCTL_MASTER_NO },
 	{ "no",				SSHCTL_MASTER_NO },
 	{ "auto",			SSHCTL_MASTER_AUTO },
 	{ "ask",			SSHCTL_MASTER_ASK },
 	{ "autoask",			SSHCTL_MASTER_AUTO_ASK },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_tunnel[] = {
 	{ "ethernet",			SSH_TUNMODE_ETHERNET },
 	{ "point-to-point",		SSH_TUNMODE_POINTOPOINT },
 	{ "true",			SSH_TUNMODE_DEFAULT },
 	{ "yes",			SSH_TUNMODE_DEFAULT },
 	{ "false",			SSH_TUNMODE_NO },
 	{ "no",				SSH_TUNMODE_NO },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_requesttty[] = {
 	{ "true",			REQUEST_TTY_YES },
 	{ "yes",			REQUEST_TTY_YES },
 	{ "false",			REQUEST_TTY_NO },
 	{ "no",				REQUEST_TTY_NO },
 	{ "force",			REQUEST_TTY_FORCE },
 	{ "auto",			REQUEST_TTY_AUTO },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_sessiontype[] = {
 	{ "none",			SESSION_TYPE_NONE },
 	{ "subsystem",			SESSION_TYPE_SUBSYSTEM },
 	{ "default",			SESSION_TYPE_DEFAULT },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_canonicalizehostname[] = {
 	{ "true",			SSH_CANONICALISE_YES },
 	{ "false",			SSH_CANONICALISE_NO },
 	{ "yes",			SSH_CANONICALISE_YES },
 	{ "no",				SSH_CANONICALISE_NO },
 	{ "always",			SSH_CANONICALISE_ALWAYS },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_pubkey_auth[] = {
 	{ "true",			SSH_PUBKEY_AUTH_ALL },
 	{ "false",			SSH_PUBKEY_AUTH_NO },
 	{ "yes",			SSH_PUBKEY_AUTH_ALL },
 	{ "no",				SSH_PUBKEY_AUTH_NO },
 	{ "unbound",			SSH_PUBKEY_AUTH_UNBOUND },
 	{ "host-bound",			SSH_PUBKEY_AUTH_HBOUND },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_compression[] = {
 #ifdef WITH_ZLIB
 	{ "yes",			COMP_ZLIB },
 #endif
 	{ "no",				COMP_NONE },
 	{ NULL, -1 }
 };
 
 static int
 parse_multistate_value(const char *arg, const char *filename, int linenum,
     const struct multistate *multistate_ptr)
 {
 	int i;
 
 	if (!arg || *arg == '\0') {
 		error("%s line %d: missing argument.", filename, linenum);
 		return -1;
 	}
 	for (i = 0; multistate_ptr[i].key != NULL; i++) {
 		if (strcasecmp(arg, multistate_ptr[i].key) == 0)
 			return multistate_ptr[i].value;
 	}
 	return -1;
 }
 
 /*
  * Processes a single option line as used in the configuration files. This
  * only sets those values that have not already been set.
  */
 int
 process_config_line(Options *options, struct passwd *pw, const char *host,
     const char *original_host, char *line, const char *filename,
     int linenum, int *activep, int flags)
 {
 	return process_config_line_depth(options, pw, host, original_host,
 	    line, filename, linenum, activep, flags, NULL, 0);
 }
 
 #define WHITESPACE " \t\r\n"
 static int
 process_config_line_depth(Options *options, struct passwd *pw, const char *host,
     const char *original_host, char *line, const char *filename,
     int linenum, int *activep, int flags, int *want_final_pass, int depth)
 {
 	char *str, **charptr, *endofnumber, *keyword, *arg, *arg2, *p;
 	char **cpptr, ***cppptr, fwdarg[256];
-	u_int i, *uintptr, uvalue, max_entries = 0;
+	u_int i, *uintptr, max_entries = 0;
 	int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
-	int remotefwd, dynamicfwd, ca_only = 0;
+	int remotefwd, dynamicfwd, ca_only = 0, found = 0;
 	LogLevel *log_level_ptr;
 	SyslogFacility *log_facility_ptr;
 	long long val64;
 	size_t len;
 	struct Forward fwd;
 	const struct multistate *multistate_ptr;
-	struct allowed_cname *cname;
 	glob_t gl;
 	const char *errstr;
 	char **oav = NULL, **av;
 	int oac = 0, ac;
 	int ret = -1;
+	struct allowed_cname *cnames = NULL;
+	u_int ncnames = 0;
+	char **strs = NULL; /* string array arguments; freed implicitly */
+	u_int nstrs = 0;
 
 	if (activep == NULL) { /* We are processing a command line directive */
 		cmdline = 1;
 		activep = &cmdline;
 	}
 
 	/* Strip trailing whitespace. Allow \f (form feed) at EOL only */
 	if ((len = strlen(line)) == 0)
 		return 0;
 	for (len--; len > 0; len--) {
 		if (strchr(WHITESPACE "\f", line[len]) == NULL)
 			break;
 		line[len] = '\0';
 	}
 
 	str = line;
 	/* Get the keyword. (Each line is supposed to begin with a keyword). */
 	if ((keyword = strdelim(&str)) == NULL)
 		return 0;
 	/* Ignore leading whitespace. */
 	if (*keyword == '\0')
 		keyword = strdelim(&str);
 	if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
 		return 0;
 	/* Match lowercase keyword */
 	lowercase(keyword);
 
 	/* Prepare to parse remainder of line */
 	if (str != NULL)
 		str += strspn(str, WHITESPACE);
 	if (str == NULL || *str == '\0') {
 		error("%s line %d: no argument after keyword \"%s\"",
 		    filename, linenum, keyword);
 		return -1;
 	}
 	opcode = parse_token(keyword, filename, linenum,
 	    options->ignored_unknown);
 	if (argv_split(str, &oac, &oav, 1) != 0) {
 		error("%s line %d: invalid quotes", filename, linenum);
 		return -1;
 	}
 	ac = oac;
 	av = oav;
 
 	switch (opcode) {
 	case oBadOption:
 		/* don't panic, but count bad options */
 		goto out;
 	case oIgnore:
 		argv_consume(&ac);
 		break;
 	case oIgnoredUnknownOption:
 		debug("%s line %d: Ignored unknown option \"%s\"",
 		    filename, linenum, keyword);
 		argv_consume(&ac);
 		break;
 	case oConnectTimeout:
 		intptr = &options->connection_timeout;
 parse_time:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%s line %d: missing time value.",
 			    filename, linenum);
 			goto out;
 		}
 		if (strcmp(arg, "none") == 0)
 			value = -1;
 		else if ((value = convtime(arg)) == -1) {
 			error("%s line %d: invalid time value.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oForwardAgent:
 		intptr = &options->forward_agent;
 
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%s line %d: missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 
 		value = -1;
 		multistate_ptr = multistate_flag;
 		for (i = 0; multistate_ptr[i].key != NULL; i++) {
 			if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
 				value = multistate_ptr[i].value;
 				break;
 			}
 		}
 		if (value != -1) {
 			if (*activep && *intptr == -1)
 				*intptr = value;
 			break;
 		}
 		/* ForwardAgent wasn't 'yes' or 'no', assume a path */
 		if (*activep && *intptr == -1)
 			*intptr = 1;
 
 		charptr = &options->forward_agent_sock_path;
 		goto parse_agent_path;
 
 	case oForwardX11:
 		intptr = &options->forward_x11;
  parse_flag:
 		multistate_ptr = multistate_flag;
  parse_multistate:
 		arg = argv_next(&ac, &av);
 		if ((value = parse_multistate_value(arg, filename, linenum,
 		    multistate_ptr)) == -1) {
 			error("%s line %d: unsupported option \"%s\".",
 			    filename, linenum, arg);
 			goto out;
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oForwardX11Trusted:
 		intptr = &options->forward_x11_trusted;
 		goto parse_flag;
 
 	case oForwardX11Timeout:
 		intptr = &options->forward_x11_timeout;
 		goto parse_time;
 
 	case oGatewayPorts:
 		intptr = &options->fwd_opts.gateway_ports;
 		goto parse_flag;
 
 	case oExitOnForwardFailure:
 		intptr = &options->exit_on_forward_failure;
 		goto parse_flag;
 
 	case oPasswordAuthentication:
 		intptr = &options->password_authentication;
 		goto parse_flag;
 
 	case oKbdInteractiveAuthentication:
 		intptr = &options->kbd_interactive_authentication;
 		goto parse_flag;
 
 	case oKbdInteractiveDevices:
 		charptr = &options->kbd_interactive_devices;
 		goto parse_string;
 
 	case oPubkeyAuthentication:
 		multistate_ptr = multistate_pubkey_auth;
 		intptr = &options->pubkey_authentication;
 		goto parse_multistate;
 
 	case oHostbasedAuthentication:
 		intptr = &options->hostbased_authentication;
 		goto parse_flag;
 
 	case oGssAuthentication:
 		intptr = &options->gss_authentication;
 		goto parse_flag;
 
 	case oGssDelegateCreds:
 		intptr = &options->gss_deleg_creds;
 		goto parse_flag;
 
 	case oBatchMode:
 		intptr = &options->batch_mode;
 		goto parse_flag;
 
 	case oCheckHostIP:
 		intptr = &options->check_host_ip;
 		goto parse_flag;
 
 	case oVerifyHostKeyDNS:
 		intptr = &options->verify_host_key_dns;
 		multistate_ptr = multistate_yesnoask;
 		goto parse_multistate;
 
 	case oStrictHostKeyChecking:
 		intptr = &options->strict_host_key_checking;
 		multistate_ptr = multistate_strict_hostkey;
 		goto parse_multistate;
 
 	case oCompression:
 		intptr = &options->compression;
 		multistate_ptr = multistate_compression;
 		goto parse_multistate;
 
 	case oTCPKeepAlive:
 		intptr = &options->tcp_keep_alive;
 		goto parse_flag;
 
 	case oNoHostAuthenticationForLocalhost:
 		intptr = &options->no_host_authentication_for_localhost;
 		goto parse_flag;
 
 	case oNumberOfPasswordPrompts:
 		intptr = &options->number_of_password_prompts;
 		goto parse_int;
 
 	case oRekeyLimit:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.", filename,
 			    linenum);
 			goto out;
 		}
 		if (strcmp(arg, "default") == 0) {
 			val64 = 0;
 		} else {
 			if (scan_scaled(arg, &val64) == -1) {
 				error("%.200s line %d: Bad number '%s': %s",
 				    filename, linenum, arg, strerror(errno));
 				goto out;
 			}
 			if (val64 != 0 && val64 < 16) {
 				error("%.200s line %d: RekeyLimit too small",
 				    filename, linenum);
 				goto out;
 			}
 		}
 		if (*activep && options->rekey_limit == -1)
 			options->rekey_limit = val64;
 		if (ac != 0) { /* optional rekey interval present */
 			if (strcmp(av[0], "none") == 0) {
 				(void)argv_next(&ac, &av);	/* discard */
 				break;
 			}
 			intptr = &options->rekey_interval;
 			goto parse_time;
 		}
 		break;
 
 	case oIdentityFile:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep) {
 			intptr = &options->num_identity_files;
 			if (*intptr >= SSH_MAX_IDENTITY_FILES) {
 				error("%.200s line %d: Too many identity files "
 				    "specified (max %d).", filename, linenum,
 				    SSH_MAX_IDENTITY_FILES);
 				goto out;
 			}
 			add_identity_file(options, NULL,
 			    arg, flags & SSHCONF_USERCONF);
 		}
 		break;
 
 	case oCertificateFile:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep) {
 			intptr = &options->num_certificate_files;
 			if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
 				error("%.200s line %d: Too many certificate "
 				    "files specified (max %d).",
 				    filename, linenum,
 				    SSH_MAX_CERTIFICATE_FILES);
 				goto out;
 			}
 			add_certificate_file(options, arg,
 			    flags & SSHCONF_USERCONF);
 		}
 		break;
 
 	case oXAuthLocation:
 		charptr=&options->xauth_location;
 		goto parse_string;
 
 	case oUser:
 		charptr = &options->user;
 parse_string:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case oGlobalKnownHostsFile:
 		cpptr = (char **)&options->system_hostfiles;
 		uintptr = &options->num_system_hostfiles;
 		max_entries = SSH_MAX_HOSTS_FILES;
 parse_char_array:
 		i = 0;
 		value = *uintptr == 0; /* was array empty when we started? */
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
 				if (i > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			}
 			i++;
 			if (*activep && value) {
 				if ((*uintptr) >= max_entries) {
 					error("%s line %d: too many %s "
 					    "entries.", filename, linenum,
 					    keyword);
 					goto out;
 				}
 				cpptr[(*uintptr)++] = xstrdup(arg);
 			}
 		}
 		break;
 
 	case oUserKnownHostsFile:
 		cpptr = (char **)&options->user_hostfiles;
 		uintptr = &options->num_user_hostfiles;
 		max_entries = SSH_MAX_HOSTS_FILES;
 		goto parse_char_array;
 
 	case oHostname:
 		charptr = &options->hostname;
 		goto parse_string;
 
 	case oTag:
 		charptr = &options->tag;
 		goto parse_string;
 
 	case oHostKeyAlias:
 		charptr = &options->host_key_alias;
 		goto parse_string;
 
 	case oPreferredAuthentications:
 		charptr = &options->preferred_authentications;
 		goto parse_string;
 
 	case oBindAddress:
 		charptr = &options->bind_address;
 		goto parse_string;
 
 	case oBindInterface:
 		charptr = &options->bind_interface;
 		goto parse_string;
 
 	case oPKCS11Provider:
 		charptr = &options->pkcs11_provider;
 		goto parse_string;
 
 	case oSecurityKeyProvider:
 		charptr = &options->sk_provider;
 		goto parse_string;
 
 	case oKnownHostsCommand:
 		charptr = &options->known_hosts_command;
 		goto parse_command;
 
 	case oProxyCommand:
 		charptr = &options->proxy_command;
 		/* Ignore ProxyCommand if ProxyJump already specified */
 		if (options->jump_host != NULL)
 			charptr = &options->jump_host; /* Skip below */
 parse_command:
 		if (str == NULL) {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		len = strspn(str, WHITESPACE "=");
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(str + len);
 		argv_consume(&ac);
 		break;
 
 	case oProxyJump:
 		if (str == NULL) {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		len = strspn(str, WHITESPACE "=");
 		/* XXX use argv? */
 		if (parse_jump(str + len, options, *activep) == -1) {
 			error("%.200s line %d: Invalid ProxyJump \"%s\"",
 			    filename, linenum, str + len);
 			goto out;
 		}
 		argv_consume(&ac);
 		break;
 
 	case oPort:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		value = a2port(arg);
 		if (value <= 0) {
 			error("%.200s line %d: Bad port '%s'.",
 			    filename, linenum, arg);
 			goto out;
 		}
 		if (*activep && options->port == -1)
 			options->port = value;
 		break;
 
 	case oConnectionAttempts:
 		intptr = &options->connection_attempts;
 parse_int:
 		arg = argv_next(&ac, &av);
 		if ((errstr = atoi_err(arg, &value)) != NULL) {
 			error("%s line %d: integer value %s.",
 			    filename, linenum, errstr);
 			goto out;
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oCiphers:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*arg != '-' &&
 		    !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)){
 			error("%.200s line %d: Bad SSH2 cipher spec '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*activep && options->ciphers == NULL)
 			options->ciphers = xstrdup(arg);
 		break;
 
 	case oMacs:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*arg != '-' &&
 		    !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)) {
 			error("%.200s line %d: Bad SSH2 MAC spec '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*activep && options->macs == NULL)
 			options->macs = xstrdup(arg);
 		break;
 
 	case oKexAlgorithms:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*arg != '-' &&
 		    !kex_names_valid(*arg == '+' || *arg == '^' ?
 		    arg + 1 : arg)) {
 			error("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*activep && options->kex_algorithms == NULL)
 			options->kex_algorithms = xstrdup(arg);
 		break;
 
 	case oHostKeyAlgorithms:
 		charptr = &options->hostkeyalgorithms;
 		ca_only = 0;
 parse_pubkey_algos:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*arg != '-' &&
 		    !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
 		    arg + 1 : arg, 1, ca_only)) {
 			error("%s line %d: Bad key types '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case oCASignatureAlgorithms:
 		charptr = &options->ca_sign_algorithms;
 		ca_only = 1;
 		goto parse_pubkey_algos;
 
 	case oLogLevel:
 		log_level_ptr = &options->log_level;
 		arg = argv_next(&ac, &av);
 		value = log_level_number(arg);
 		if (value == SYSLOG_LEVEL_NOT_SET) {
 			error("%.200s line %d: unsupported log level '%s'",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
 			*log_level_ptr = (LogLevel) value;
 		break;
 
 	case oLogFacility:
 		log_facility_ptr = &options->log_facility;
 		arg = argv_next(&ac, &av);
 		value = log_facility_number(arg);
 		if (value == SYSLOG_FACILITY_NOT_SET) {
 			error("%.200s line %d: unsupported log facility '%s'",
 			    filename, linenum, arg ? arg : "<NONE>");
 			goto out;
 		}
 		if (*log_facility_ptr == -1)
 			*log_facility_ptr = (SyslogFacility) value;
 		break;
 
 	case oLogVerbose:
 		cppptr = &options->log_verbose;
 		uintptr = &options->num_log_verbose;
 		i = 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
 				if (i > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			}
 			i++;
 			if (*activep && *uintptr == 0) {
 				*cppptr = xrecallocarray(*cppptr, *uintptr,
 				    *uintptr + 1, sizeof(**cppptr));
 				(*cppptr)[(*uintptr)++] = xstrdup(arg);
 			}
 		}
 		break;
 
 	case oLocalForward:
 	case oRemoteForward:
 	case oDynamicForward:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 
 		remotefwd = (opcode == oRemoteForward);
 		dynamicfwd = (opcode == oDynamicForward);
 
 		if (!dynamicfwd) {
 			arg2 = argv_next(&ac, &av);
 			if (arg2 == NULL || *arg2 == '\0') {
 				if (remotefwd)
 					dynamicfwd = 1;
 				else {
 					error("%.200s line %d: Missing target "
 					    "argument.", filename, linenum);
 					goto out;
 				}
 			} else {
 				/* construct a string for parse_forward */
 				snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
 				    arg2);
 			}
 		}
 		if (dynamicfwd)
 			strlcpy(fwdarg, arg, sizeof(fwdarg));
 
 		if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0) {
 			error("%.200s line %d: Bad forwarding specification.",
 			    filename, linenum);
 			goto out;
 		}
 
 		if (*activep) {
 			if (remotefwd) {
 				add_remote_forward(options, &fwd);
 			} else {
 				add_local_forward(options, &fwd);
 			}
 		}
 		break;
 
 	case oPermitRemoteOpen:
 		uintptr = &options->num_permitted_remote_opens;
 		cppptr = &options->permitted_remote_opens;
-		uvalue = *uintptr;	/* modified later */
-		i = 0;
+		found = *uintptr == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			arg2 = xstrdup(arg);
 			/* Allow any/none only in first position */
 			if (strcasecmp(arg, "none") == 0 ||
 			    strcasecmp(arg, "any") == 0) {
-				if (i > 0 || ac > 0) {
+				if (nstrs > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"%s\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword, arg);
 					free(arg2);
 					goto out;
 				}
 			} else {
 				p = hpdelim(&arg);
 				if (p == NULL) {
 					fatal("%s line %d: missing host in %s",
 					    filename, linenum,
 					    lookup_opcode_name(opcode));
 				}
 				p = cleanhostname(p);
 				/*
 				 * don't want to use permitopen_port to avoid
 				 * dependency on channels.[ch] here.
 				 */
 				if (arg == NULL || (strcmp(arg, "*") != 0 &&
 				    a2port(arg) <= 0)) {
 					fatal("%s line %d: bad port number "
 					    "in %s", filename, linenum,
 					    lookup_opcode_name(opcode));
 				}
 			}
-			if (*activep && uvalue == 0) {
-				opt_array_append(filename, linenum,
-				    lookup_opcode_name(opcode),
-				    cppptr, uintptr, arg2);
-			}
+			opt_array_append(filename, linenum,
+			    lookup_opcode_name(opcode),
+			    &strs, &nstrs, arg2);
 			free(arg2);
-			i++;
 		}
-		if (i == 0)
+		if (nstrs == 0)
 			fatal("%s line %d: missing %s specification",
 			    filename, linenum, lookup_opcode_name(opcode));
+		if (found && *activep) {
+			*cppptr = strs;
+			*uintptr = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
+		}
 		break;
 
 	case oClearAllForwardings:
 		intptr = &options->clear_forwardings;
 		goto parse_flag;
 
 	case oHost:
 		if (cmdline) {
 			error("Host directive not supported as a command-line "
 			    "option");
 			goto out;
 		}
 		*activep = 0;
 		arg2 = NULL;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			if ((flags & SSHCONF_NEVERMATCH) != 0) {
 				argv_consume(&ac);
 				break;
 			}
 			negated = *arg == '!';
 			if (negated)
 				arg++;
 			if (match_pattern(host, arg)) {
 				if (negated) {
 					debug("%.200s line %d: Skipping Host "
 					    "block because of negated match "
 					    "for %.100s", filename, linenum,
 					    arg);
 					*activep = 0;
 					argv_consume(&ac);
 					break;
 				}
 				if (!*activep)
 					arg2 = arg; /* logged below */
 				*activep = 1;
 			}
 		}
 		if (*activep)
 			debug("%.200s line %d: Applying options for %.100s",
 			    filename, linenum, arg2);
 		break;
 
 	case oMatch:
 		if (cmdline) {
 			error("Host directive not supported as a command-line "
 			    "option");
 			goto out;
 		}
 		value = match_cfg_line(options, &str, pw, host, original_host,
 		    flags & SSHCONF_FINAL, want_final_pass,
 		    filename, linenum);
 		if (value < 0) {
 			error("%.200s line %d: Bad Match condition", filename,
 			    linenum);
 			goto out;
 		}
 		*activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
 		/*
 		 * If match_cfg_line() didn't consume all its arguments then
 		 * arrange for the extra arguments check below to fail.
 		 */
 
 		if (str == NULL || *str == '\0')
 			argv_consume(&ac);
 		break;
 
 	case oEscapeChar:
 		intptr = &options->escape_char;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (strcmp(arg, "none") == 0)
 			value = SSH_ESCAPECHAR_NONE;
 		else if (arg[1] == '\0')
 			value = (u_char) arg[0];
 		else if (arg[0] == '^' && arg[2] == 0 &&
 		    (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
 			value = (u_char) arg[1] & 31;
 		else {
 			error("%.200s line %d: Bad escape character.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oAddressFamily:
 		intptr = &options->address_family;
 		multistate_ptr = multistate_addressfamily;
 		goto parse_multistate;
 
 	case oEnableSSHKeysign:
 		intptr = &options->enable_ssh_keysign;
 		goto parse_flag;
 
 	case oIdentitiesOnly:
 		intptr = &options->identities_only;
 		goto parse_flag;
 
 	case oServerAliveInterval:
 		intptr = &options->server_alive_interval;
 		goto parse_time;
 
 	case oServerAliveCountMax:
 		intptr = &options->server_alive_count_max;
 		goto parse_int;
 
 	case oSendEnv:
+		/* XXX appends to list; doesn't respect first-match-wins */
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0' || strchr(arg, '=') != NULL) {
 				error("%s line %d: Invalid environment name.",
 				    filename, linenum);
 				goto out;
 			}
+			found = 1;
 			if (!*activep)
 				continue;
 			if (*arg == '-') {
 				/* Removing an env var */
 				rm_env(options, arg, filename, linenum);
 				continue;
 			}
 			opt_array_append(filename, linenum,
 			    lookup_opcode_name(opcode),
 			    &options->send_env, &options->num_send_env, arg);
 		}
+		if (!found) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
 		break;
 
 	case oSetEnv:
-		value = options->num_setenv;
+		found = options->num_setenv == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (strchr(arg, '=') == NULL) {
 				error("%s line %d: Invalid SetEnv.",
 				    filename, linenum);
 				goto out;
 			}
-			if (!*activep || value != 0)
-				continue;
-			if (lookup_setenv_in_list(arg, options->setenv,
-			    options->num_setenv) != NULL) {
+			if (lookup_setenv_in_list(arg, strs, nstrs) != NULL) {
 				debug2("%s line %d: ignoring duplicate env "
 				    "name \"%.64s\"", filename, linenum, arg);
 				continue;
 			}
 			opt_array_append(filename, linenum,
 			    lookup_opcode_name(opcode),
-			    &options->setenv, &options->num_setenv, arg);
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->setenv = strs;
+			options->num_setenv = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case oControlPath:
 		charptr = &options->control_path;
 		goto parse_string;
 
 	case oControlMaster:
 		intptr = &options->control_master;
 		multistate_ptr = multistate_controlmaster;
 		goto parse_multistate;
 
 	case oControlPersist:
 		/* no/false/yes/true, or a time spec */
 		intptr = &options->control_persist;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing ControlPersist"
 			    " argument.", filename, linenum);
 			goto out;
 		}
 		value = 0;
 		value2 = 0;	/* timeout */
 		if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
 			value = 0;
 		else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
 			value = 1;
 		else if ((value2 = convtime(arg)) >= 0)
 			value = 1;
 		else {
 			error("%.200s line %d: Bad ControlPersist argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && *intptr == -1) {
 			*intptr = value;
 			options->control_persist_timeout = value2;
 		}
 		break;
 
 	case oHashKnownHosts:
 		intptr = &options->hash_known_hosts;
 		goto parse_flag;
 
 	case oTunnel:
 		intptr = &options->tun_open;
 		multistate_ptr = multistate_tunnel;
 		goto parse_multistate;
 
 	case oTunnelDevice:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		value = a2tun(arg, &value2);
 		if (value == SSH_TUNID_ERR) {
 			error("%.200s line %d: Bad tun device.",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && options->tun_local == -1) {
 			options->tun_local = value;
 			options->tun_remote = value2;
 		}
 		break;
 
 	case oLocalCommand:
 		charptr = &options->local_command;
 		goto parse_command;
 
 	case oPermitLocalCommand:
 		intptr = &options->permit_local_command;
 		goto parse_flag;
 
 	case oRemoteCommand:
 		charptr = &options->remote_command;
 		goto parse_command;
 
 	case oVisualHostKey:
 		intptr = &options->visual_host_key;
 		goto parse_flag;
 
 	case oInclude:
 		if (cmdline) {
 			error("Include directive not supported as a "
 			    "command-line option");
 			goto out;
 		}
 		value = 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			/*
 			 * Ensure all paths are anchored. User configuration
 			 * files may begin with '~/' but system configurations
 			 * must not. If the path is relative, then treat it
 			 * as living in ~/.ssh for user configurations or
 			 * /etc/ssh for system ones.
 			 */
 			if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0) {
 				error("%.200s line %d: bad include path %s.",
 				    filename, linenum, arg);
 				goto out;
 			}
 			if (!path_absolute(arg) && *arg != '~') {
 				xasprintf(&arg2, "%s/%s",
 				    (flags & SSHCONF_USERCONF) ?
 				    "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
 			} else
 				arg2 = xstrdup(arg);
 			memset(&gl, 0, sizeof(gl));
 			r = glob(arg2, GLOB_TILDE, NULL, &gl);
 			if (r == GLOB_NOMATCH) {
 				debug("%.200s line %d: include %s matched no "
 				    "files",filename, linenum, arg2);
 				free(arg2);
 				continue;
 			} else if (r != 0) {
 				error("%.200s line %d: glob failed for %s.",
 				    filename, linenum, arg2);
 				goto out;
 			}
 			free(arg2);
 			oactive = *activep;
 			for (i = 0; i < gl.gl_pathc; i++) {
 				debug3("%.200s line %d: Including file %s "
 				    "depth %d%s", filename, linenum,
 				    gl.gl_pathv[i], depth,
 				    oactive ? "" : " (parse only)");
 				r = read_config_file_depth(gl.gl_pathv[i],
 				    pw, host, original_host, options,
 				    flags | SSHCONF_CHECKPERM |
 				    (oactive ? 0 : SSHCONF_NEVERMATCH),
 				    activep, want_final_pass, depth + 1);
 				if (r != 1 && errno != ENOENT) {
 					error("Can't open user config file "
 					    "%.100s: %.100s", gl.gl_pathv[i],
 					    strerror(errno));
 					globfree(&gl);
 					goto out;
 				}
 				/*
 				 * don't let Match in includes clobber the
 				 * containing file's Match state.
 				 */
 				*activep = oactive;
 				if (r != 1)
 					value = -1;
 			}
 			globfree(&gl);
 		}
 		if (value != 0)
 			ret = value;
 		break;
 
 	case oIPQoS:
 		arg = argv_next(&ac, &av);
 		if ((value = parse_ipqos(arg)) == -1) {
 			error("%s line %d: Bad IPQoS value: %s",
 			    filename, linenum, arg);
 			goto out;
 		}
 		arg = argv_next(&ac, &av);
 		if (arg == NULL)
 			value2 = value;
 		else if ((value2 = parse_ipqos(arg)) == -1) {
 			error("%s line %d: Bad IPQoS value: %s",
 			    filename, linenum, arg);
 			goto out;
 		}
 		if (*activep && options->ip_qos_interactive == -1) {
 			options->ip_qos_interactive = value;
 			options->ip_qos_bulk = value2;
 		}
 		break;
 
 	case oRequestTTY:
 		intptr = &options->request_tty;
 		multistate_ptr = multistate_requesttty;
 		goto parse_multistate;
 
 	case oSessionType:
 		intptr = &options->session_type;
 		multistate_ptr = multistate_sessiontype;
 		goto parse_multistate;
 
 	case oStdinNull:
 		intptr = &options->stdin_null;
 		goto parse_flag;
 
 	case oForkAfterAuthentication:
 		intptr = &options->fork_after_authentication;
 		goto parse_flag;
 
 	case oIgnoreUnknown:
 		charptr = &options->ignored_unknown;
 		goto parse_string;
 
 	case oProxyUseFdpass:
 		intptr = &options->proxy_use_fdpass;
 		goto parse_flag;
 
 	case oCanonicalDomains:
-		value = options->num_canonical_domains != 0;
-		i = 0;
+		found = options->num_canonical_domains == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
-			if (*arg == '\0') {
-				error("%s line %d: keyword %s empty argument",
-				    filename, linenum, keyword);
-				goto out;
-			}
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
-				if (i > 0 || ac > 0) {
+				if (nstrs > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			}
-			i++;
 			if (!valid_domain(arg, 1, &errstr)) {
 				error("%s line %d: %s", filename, linenum,
 				    errstr);
 				goto out;
 			}
-			if (!*activep || value)
-				continue;
-			if (options->num_canonical_domains >=
-			    MAX_CANON_DOMAINS) {
-				error("%s line %d: too many hostname suffixes.",
-				    filename, linenum);
-				goto out;
-			}
-			options->canonical_domains[
-			    options->num_canonical_domains++] = xstrdup(arg);
+			opt_array_append(filename, linenum, keyword,
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->canonical_domains = strs;
+			options->num_canonical_domains = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case oCanonicalizePermittedCNAMEs:
-		value = options->num_permitted_cnames != 0;
-		i = 0;
+		found = options->num_permitted_cnames == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			/*
 			 * Either 'none' (only in first position), '*' for
 			 * everything or 'list:list'
 			 */
 			if (strcasecmp(arg, "none") == 0) {
-				if (i > 0 || ac > 0) {
+				if (ncnames > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 				arg2 = "";
 			} else if (strcmp(arg, "*") == 0) {
 				arg2 = arg;
 			} else {
 				lowercase(arg);
 				if ((arg2 = strchr(arg, ':')) == NULL ||
 				    arg2[1] == '\0') {
 					error("%s line %d: "
 					    "Invalid permitted CNAME \"%s\"",
 					    filename, linenum, arg);
 					goto out;
 				}
 				*arg2 = '\0';
 				arg2++;
 			}
-			i++;
-			if (!*activep || value)
-				continue;
-			if (options->num_permitted_cnames >=
-			    MAX_CANON_DOMAINS) {
-				error("%s line %d: too many permitted CNAMEs.",
-				    filename, linenum);
-				goto out;
-			}
-			cname = options->permitted_cnames +
-			    options->num_permitted_cnames++;
-			cname->source_list = xstrdup(arg);
-			cname->target_list = xstrdup(arg2);
-		}
+			cnames = xrecallocarray(cnames, ncnames, ncnames + 1,
+			    sizeof(*cnames));
+			cnames[ncnames].source_list = xstrdup(arg);
+			cnames[ncnames].target_list = xstrdup(arg2);
+			ncnames++;
+		}
+		if (ncnames == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->permitted_cnames = cnames;
+			options->num_permitted_cnames = ncnames;
+			cnames = NULL; /* transferred */
+			ncnames = 0;
+		}
+		/* un-transferred cnames is cleaned up before exit */
 		break;
 
 	case oCanonicalizeHostname:
 		intptr = &options->canonicalize_hostname;
 		multistate_ptr = multistate_canonicalizehostname;
 		goto parse_multistate;
 
 	case oCanonicalizeMaxDots:
 		intptr = &options->canonicalize_max_dots;
 		goto parse_int;
 
 	case oCanonicalizeFallbackLocal:
 		intptr = &options->canonicalize_fallback_local;
 		goto parse_flag;
 
 	case oStreamLocalBindMask:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing StreamLocalBindMask "
 			    "argument.", filename, linenum);
 			goto out;
 		}
 		/* Parse mode in octal format */
 		value = strtol(arg, &endofnumber, 8);
 		if (arg == endofnumber || value < 0 || value > 0777) {
 			error("%.200s line %d: Bad mask.", filename, linenum);
 			goto out;
 		}
 		options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
 		break;
 
 	case oStreamLocalBindUnlink:
 		intptr = &options->fwd_opts.streamlocal_bind_unlink;
 		goto parse_flag;
 
 	case oRevokedHostKeys:
 		charptr = &options->revoked_host_keys;
 		goto parse_string;
 
 	case oFingerprintHash:
 		intptr = &options->fingerprint_hash;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
 		if ((value = ssh_digest_alg_by_name(arg)) == -1) {
 			error("%.200s line %d: Invalid hash algorithm \"%s\".",
 			    filename, linenum, arg);
 			goto out;
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oUpdateHostkeys:
 		intptr = &options->update_hostkeys;
 		multistate_ptr = multistate_yesnoask;
 		goto parse_multistate;
 
 	case oHostbasedAcceptedAlgorithms:
 		charptr = &options->hostbased_accepted_algos;
 		ca_only = 0;
 		goto parse_pubkey_algos;
 
 	case oPubkeyAcceptedAlgorithms:
 		charptr = &options->pubkey_accepted_algos;
 		ca_only = 0;
 		goto parse_pubkey_algos;
 
 	case oAddKeysToAgent:
 		arg = argv_next(&ac, &av);
 		arg2 = argv_next(&ac, &av);
 		value = parse_multistate_value(arg, filename, linenum,
 		    multistate_yesnoaskconfirm);
 		value2 = 0; /* unlimited lifespan by default */
 		if (value == 3 && arg2 != NULL) {
 			/* allow "AddKeysToAgent confirm 5m" */
 			if ((value2 = convtime(arg2)) == -1) {
 				error("%s line %d: invalid time value.",
 				    filename, linenum);
 				goto out;
 			}
 		} else if (value == -1 && arg2 == NULL) {
 			if ((value2 = convtime(arg)) == -1) {
 				error("%s line %d: unsupported option",
 				    filename, linenum);
 				goto out;
 			}
 			value = 1; /* yes */
 		} else if (value == -1 || arg2 != NULL) {
 			error("%s line %d: unsupported option",
 			    filename, linenum);
 			goto out;
 		}
 		if (*activep && options->add_keys_to_agent == -1) {
 			options->add_keys_to_agent = value;
 			options->add_keys_to_agent_lifespan = value2;
 		}
 		break;
 
 	case oIdentityAgent:
 		charptr = &options->identity_agent;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			error("%.200s line %d: Missing argument.",
 			    filename, linenum);
 			goto out;
 		}
   parse_agent_path:
 		/* Extra validation if the string represents an env var. */
 		if ((arg2 = dollar_expand(&r, arg)) == NULL || r) {
 			error("%.200s line %d: Invalid environment expansion "
 			    "%s.", filename, linenum, arg);
 			goto out;
 		}
 		free(arg2);
 		/* check for legacy environment format */
 		if (arg[0] == '$' && arg[1] != '{' &&
 		    !valid_env_name(arg + 1)) {
 			error("%.200s line %d: Invalid environment name %s.",
 			    filename, linenum, arg);
 			goto out;
 		}
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case oEnableEscapeCommandline:
 		intptr = &options->enable_escape_commandline;
 		goto parse_flag;
 
 	case oRequiredRSASize:
 		intptr = &options->required_rsa_size;
 		goto parse_int;
 
 	case oObscureKeystrokeTiming:
 		value = -1;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (value != -1) {
 				error("%s line %d: invalid arguments",
 				    filename, linenum);
 				goto out;
 			}
 			if (strcmp(arg, "yes") == 0 ||
 			    strcmp(arg, "true") == 0)
 				value = SSH_KEYSTROKE_DEFAULT_INTERVAL_MS;
 			else if (strcmp(arg, "no") == 0 ||
 			    strcmp(arg, "false") == 0)
 				value = 0;
 			else if (strncmp(arg, "interval:", 9) == 0) {
 				if ((errstr = atoi_err(arg + 9,
 				    &value)) != NULL) {
 					error("%s line %d: integer value %s.",
 					    filename, linenum, errstr);
 					goto out;
 				}
 				if (value <= 0 || value > 1000) {
 					error("%s line %d: value out of range.",
 					    filename, linenum);
 					goto out;
 				}
 			} else {
 				error("%s line %d: unsupported argument \"%s\"",
 				    filename, linenum, arg);
 				goto out;
 			}
 		}
 		if (value == -1) {
 			error("%s line %d: missing argument",
 			    filename, linenum);
 			goto out;
 		}
 		intptr = &options->obscure_keystroke_timing_interval;
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case oChannelTimeout:
-		uvalue = options->num_channel_timeouts;
-		i = 0;
+		found = options->num_channel_timeouts == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
-				if (i > 0 || ac > 0) {
+				if (nstrs > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			} else if (parse_pattern_interval(arg,
 			    NULL, NULL) != 0) {
 				fatal("%s line %d: invalid channel timeout %s",
 				    filename, linenum, arg);
 			}
-			if (!*activep || uvalue != 0)
-				continue;
 			opt_array_append(filename, linenum, keyword,
-			    &options->channel_timeouts,
-			    &options->num_channel_timeouts, arg);
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->channel_timeouts = strs;
+			options->num_channel_timeouts = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case oDeprecated:
 		debug("%s line %d: Deprecated option \"%s\"",
 		    filename, linenum, keyword);
 		argv_consume(&ac);
 		break;
 
 	case oUnsupported:
 		error("%s line %d: Unsupported option \"%s\"",
 		    filename, linenum, keyword);
 		argv_consume(&ac);
 		break;
 
 	default:
 		error("%s line %d: Unimplemented opcode %d",
 		    filename, linenum, opcode);
 		goto out;
 	}
 
 	/* Check that there is no garbage at end of line. */
 	if (ac > 0) {
 		error("%.200s line %d: keyword %s extra arguments "
 		    "at end of line", filename, linenum, keyword);
 		goto out;
 	}
 
 	/* success */
 	ret = 0;
  out:
+	free_canon_cnames(cnames, ncnames);
+	opt_array_free2(strs, NULL, nstrs);
 	argv_free(oav, oac);
 	return ret;
 }
 
 /*
  * Reads the config file and modifies the options accordingly.  Options
  * should already be initialized before this call.  This never returns if
  * there is an error.  If the file does not exist, this returns 0.
  */
 int
 read_config_file(const char *filename, struct passwd *pw, const char *host,
     const char *original_host, Options *options, int flags,
     int *want_final_pass)
 {
 	int active = 1;
 
 	return read_config_file_depth(filename, pw, host, original_host,
 	    options, flags, &active, want_final_pass, 0);
 }
 
 #define READCONF_MAX_DEPTH	16
 static int
 read_config_file_depth(const char *filename, struct passwd *pw,
     const char *host, const char *original_host, Options *options,
     int flags, int *activep, int *want_final_pass, int depth)
 {
 	FILE *f;
 	char *line = NULL;
 	size_t linesize = 0;
 	int linenum;
 	int bad_options = 0;
 
 	if (depth < 0 || depth > READCONF_MAX_DEPTH)
 		fatal("Too many recursive configuration includes");
 
 	if ((f = fopen(filename, "r")) == NULL)
 		return 0;
 
 	if (flags & SSHCONF_CHECKPERM) {
 		struct stat sb;
 
 		if (fstat(fileno(f), &sb) == -1)
 			fatal("fstat %s: %s", filename, strerror(errno));
 		if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
 		    (sb.st_mode & 022) != 0))
 			fatal("Bad owner or permissions on %s", filename);
 	}
 
 	debug("Reading configuration data %.200s", filename);
 
 	/*
 	 * Mark that we are now processing the options.  This flag is turned
 	 * on/off by Host specifications.
 	 */
 	linenum = 0;
 	while (getline(&line, &linesize, f) != -1) {
 		/* Update line number counter. */
 		linenum++;
 		/*
 		 * Trim out comments and strip whitespace.
 		 * NB - preserve newlines, they are needed to reproduce
 		 * line numbers later for error messages.
 		 */
 		if (process_config_line_depth(options, pw, host, original_host,
 		    line, filename, linenum, activep, flags, want_final_pass,
 		    depth) != 0)
 			bad_options++;
 	}
 	free(line);
 	fclose(f);
 	if (bad_options > 0)
 		fatal("%s: terminating, %d bad configuration options",
 		    filename, bad_options);
 	return 1;
 }
 
 /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
 int
 option_clear_or_none(const char *o)
 {
 	return o == NULL || strcasecmp(o, "none") == 0;
 }
 
 /*
  * Returns 1 if CanonicalizePermittedCNAMEs have been specified, 0 otherwise.
  * Allowed to be called on non-final configuration.
  */
 int
 config_has_permitted_cnames(Options *options)
 {
 	if (options->num_permitted_cnames == 1 &&
 	    strcasecmp(options->permitted_cnames[0].source_list, "none") == 0 &&
 	    strcmp(options->permitted_cnames[0].target_list, "") == 0)
 		return 0;
 	return options->num_permitted_cnames > 0;
 }
 
 /*
  * Initializes options to special values that indicate that they have not yet
  * been set.  Read_config_file will only set options with this value. Options
  * are processed in the following order: command line, user config file,
  * system config file.  Last, fill_default_options is called.
  */
 
 void
 initialize_options(Options * options)
 {
 	memset(options, 'X', sizeof(*options));
 	options->host_arg = NULL;
 	options->forward_agent = -1;
 	options->forward_agent_sock_path = NULL;
 	options->forward_x11 = -1;
 	options->forward_x11_trusted = -1;
 	options->forward_x11_timeout = -1;
 	options->stdio_forward_host = NULL;
 	options->stdio_forward_port = 0;
 	options->clear_forwardings = -1;
 	options->exit_on_forward_failure = -1;
 	options->xauth_location = NULL;
 	options->fwd_opts.gateway_ports = -1;
 	options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
 	options->fwd_opts.streamlocal_bind_unlink = -1;
 	options->pubkey_authentication = -1;
 	options->gss_authentication = -1;
 	options->gss_deleg_creds = -1;
 	options->password_authentication = -1;
 	options->kbd_interactive_authentication = -1;
 	options->kbd_interactive_devices = NULL;
 	options->hostbased_authentication = -1;
 	options->batch_mode = -1;
 	options->check_host_ip = -1;
 	options->strict_host_key_checking = -1;
 	options->compression = -1;
 	options->tcp_keep_alive = -1;
 	options->port = -1;
 	options->address_family = -1;
 	options->connection_attempts = -1;
 	options->connection_timeout = -1;
 	options->number_of_password_prompts = -1;
 	options->ciphers = NULL;
 	options->macs = NULL;
 	options->kex_algorithms = NULL;
 	options->hostkeyalgorithms = NULL;
 	options->ca_sign_algorithms = NULL;
 	options->num_identity_files = 0;
 	memset(options->identity_keys, 0, sizeof(options->identity_keys));
 	options->num_certificate_files = 0;
 	memset(options->certificates, 0, sizeof(options->certificates));
 	options->hostname = NULL;
 	options->host_key_alias = NULL;
 	options->proxy_command = NULL;
 	options->jump_user = NULL;
 	options->jump_host = NULL;
 	options->jump_port = -1;
 	options->jump_extra = NULL;
 	options->user = NULL;
 	options->escape_char = -1;
 	options->num_system_hostfiles = 0;
 	options->num_user_hostfiles = 0;
 	options->local_forwards = NULL;
 	options->num_local_forwards = 0;
 	options->remote_forwards = NULL;
 	options->num_remote_forwards = 0;
 	options->permitted_remote_opens = NULL;
 	options->num_permitted_remote_opens = 0;
 	options->log_facility = SYSLOG_FACILITY_NOT_SET;
 	options->log_level = SYSLOG_LEVEL_NOT_SET;
 	options->num_log_verbose = 0;
 	options->log_verbose = NULL;
 	options->preferred_authentications = NULL;
 	options->bind_address = NULL;
 	options->bind_interface = NULL;
 	options->pkcs11_provider = NULL;
 	options->sk_provider = NULL;
 	options->enable_ssh_keysign = - 1;
 	options->no_host_authentication_for_localhost = - 1;
 	options->identities_only = - 1;
 	options->rekey_limit = - 1;
 	options->rekey_interval = -1;
 	options->verify_host_key_dns = -1;
 	options->server_alive_interval = -1;
 	options->server_alive_count_max = -1;
 	options->send_env = NULL;
 	options->num_send_env = 0;
 	options->setenv = NULL;
 	options->num_setenv = 0;
 	options->control_path = NULL;
 	options->control_master = -1;
 	options->control_persist = -1;
 	options->control_persist_timeout = 0;
 	options->hash_known_hosts = -1;
 	options->tun_open = -1;
 	options->tun_local = -1;
 	options->tun_remote = -1;
 	options->local_command = NULL;
 	options->permit_local_command = -1;
 	options->remote_command = NULL;
 	options->add_keys_to_agent = -1;
 	options->add_keys_to_agent_lifespan = -1;
 	options->identity_agent = NULL;
 	options->visual_host_key = -1;
 	options->ip_qos_interactive = -1;
 	options->ip_qos_bulk = -1;
 	options->request_tty = -1;
 	options->session_type = -1;
 	options->stdin_null = -1;
 	options->fork_after_authentication = -1;
 	options->proxy_use_fdpass = -1;
 	options->ignored_unknown = NULL;
 	options->num_canonical_domains = 0;
 	options->num_permitted_cnames = 0;
 	options->canonicalize_max_dots = -1;
 	options->canonicalize_fallback_local = -1;
 	options->canonicalize_hostname = -1;
 	options->revoked_host_keys = NULL;
 	options->fingerprint_hash = -1;
 	options->update_hostkeys = -1;
 	options->hostbased_accepted_algos = NULL;
 	options->pubkey_accepted_algos = NULL;
 	options->known_hosts_command = NULL;
 	options->required_rsa_size = -1;
 	options->enable_escape_commandline = -1;
 	options->obscure_keystroke_timing_interval = -1;
 	options->tag = NULL;
 	options->channel_timeouts = NULL;
 	options->num_channel_timeouts = 0;
 }
 
 /*
  * A petite version of fill_default_options() that just fills the options
  * needed for hostname canonicalization to proceed.
  */
 void
 fill_default_options_for_canonicalization(Options *options)
 {
 	if (options->canonicalize_max_dots == -1)
 		options->canonicalize_max_dots = 1;
 	if (options->canonicalize_fallback_local == -1)
 		options->canonicalize_fallback_local = 1;
 	if (options->canonicalize_hostname == -1)
 		options->canonicalize_hostname = SSH_CANONICALISE_NO;
 }
 
 /*
  * Called after processing other sources of option data, this fills those
  * options for which no value has been specified with their default values.
  */
 int
 fill_default_options(Options * options)
 {
 	char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
 	char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
 	int ret = 0, r;
 
 	if (options->forward_agent == -1)
 		options->forward_agent = 0;
 	if (options->forward_x11 == -1)
 		options->forward_x11 = 0;
 	if (options->forward_x11_trusted == -1)
 		options->forward_x11_trusted = 0;
 	if (options->forward_x11_timeout == -1)
 		options->forward_x11_timeout = 1200;
 	/*
 	 * stdio forwarding (-W) changes the default for these but we defer
 	 * setting the values so they can be overridden.
 	 */
 	if (options->exit_on_forward_failure == -1)
 		options->exit_on_forward_failure =
 		    options->stdio_forward_host != NULL ? 1 : 0;
 	if (options->clear_forwardings == -1)
 		options->clear_forwardings =
 		    options->stdio_forward_host != NULL ? 1 : 0;
 	if (options->clear_forwardings == 1)
 		clear_forwardings(options);
 
 	if (options->xauth_location == NULL)
 		options->xauth_location = xstrdup(_PATH_XAUTH);
 	if (options->fwd_opts.gateway_ports == -1)
 		options->fwd_opts.gateway_ports = 0;
 	if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
 		options->fwd_opts.streamlocal_bind_mask = 0177;
 	if (options->fwd_opts.streamlocal_bind_unlink == -1)
 		options->fwd_opts.streamlocal_bind_unlink = 0;
 	if (options->pubkey_authentication == -1)
 		options->pubkey_authentication = SSH_PUBKEY_AUTH_ALL;
 	if (options->gss_authentication == -1)
 		options->gss_authentication = 0;
 	if (options->gss_deleg_creds == -1)
 		options->gss_deleg_creds = 0;
 	if (options->password_authentication == -1)
 		options->password_authentication = 1;
 	if (options->kbd_interactive_authentication == -1)
 		options->kbd_interactive_authentication = 1;
 	if (options->hostbased_authentication == -1)
 		options->hostbased_authentication = 0;
 	if (options->batch_mode == -1)
 		options->batch_mode = 0;
 	if (options->check_host_ip == -1)
 		options->check_host_ip = 0;
 	if (options->strict_host_key_checking == -1)
 		options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
 	if (options->compression == -1)
 		options->compression = 0;
 	if (options->tcp_keep_alive == -1)
 		options->tcp_keep_alive = 1;
 	if (options->port == -1)
 		options->port = 0;	/* Filled in ssh_connect. */
 	if (options->address_family == -1)
 		options->address_family = AF_UNSPEC;
 	if (options->connection_attempts == -1)
 		options->connection_attempts = 1;
 	if (options->number_of_password_prompts == -1)
 		options->number_of_password_prompts = 3;
 	/* options->hostkeyalgorithms, default set in myproposals.h */
 	if (options->add_keys_to_agent == -1) {
 		options->add_keys_to_agent = 0;
 		options->add_keys_to_agent_lifespan = 0;
 	}
 	if (options->num_identity_files == 0) {
 		add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
 #ifdef OPENSSL_HAS_ECC
 		add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
 		add_identity_file(options, "~/",
 		    _PATH_SSH_CLIENT_ID_ECDSA_SK, 0);
 #endif
 		add_identity_file(options, "~/",
 		    _PATH_SSH_CLIENT_ID_ED25519, 0);
 		add_identity_file(options, "~/",
 		    _PATH_SSH_CLIENT_ID_ED25519_SK, 0);
 		add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_XMSS, 0);
+#ifdef WITH_DSA
 		add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
+#endif
 	}
 	if (options->escape_char == -1)
 		options->escape_char = '~';
 	if (options->num_system_hostfiles == 0) {
 		options->system_hostfiles[options->num_system_hostfiles++] =
 		    xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
 		options->system_hostfiles[options->num_system_hostfiles++] =
 		    xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
 	}
 	if (options->update_hostkeys == -1) {
 		if (options->verify_host_key_dns <= 0 &&
 		    (options->num_user_hostfiles == 0 ||
 		    (options->num_user_hostfiles == 1 && strcmp(options->
 		    user_hostfiles[0], _PATH_SSH_USER_HOSTFILE) == 0)))
 			options->update_hostkeys = SSH_UPDATE_HOSTKEYS_YES;
 		else
 			options->update_hostkeys = SSH_UPDATE_HOSTKEYS_NO;
 	}
 	if (options->num_user_hostfiles == 0) {
 		options->user_hostfiles[options->num_user_hostfiles++] =
 		    xstrdup(_PATH_SSH_USER_HOSTFILE);
 		options->user_hostfiles[options->num_user_hostfiles++] =
 		    xstrdup(_PATH_SSH_USER_HOSTFILE2);
 	}
 	if (options->log_level == SYSLOG_LEVEL_NOT_SET)
 		options->log_level = SYSLOG_LEVEL_INFO;
 	if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
 		options->log_facility = SYSLOG_FACILITY_USER;
 	if (options->no_host_authentication_for_localhost == - 1)
 		options->no_host_authentication_for_localhost = 0;
 	if (options->identities_only == -1)
 		options->identities_only = 0;
 	if (options->enable_ssh_keysign == -1)
 		options->enable_ssh_keysign = 0;
 	if (options->rekey_limit == -1)
 		options->rekey_limit = 0;
 	if (options->rekey_interval == -1)
 		options->rekey_interval = 0;
 	if (options->verify_host_key_dns == -1)
 		options->verify_host_key_dns = 0;
 	if (options->server_alive_interval == -1)
 		options->server_alive_interval = 0;
 	if (options->server_alive_count_max == -1)
 		options->server_alive_count_max = 3;
 	if (options->control_master == -1)
 		options->control_master = 0;
 	if (options->control_persist == -1) {
 		options->control_persist = 0;
 		options->control_persist_timeout = 0;
 	}
 	if (options->hash_known_hosts == -1)
 		options->hash_known_hosts = 0;
 	if (options->tun_open == -1)
 		options->tun_open = SSH_TUNMODE_NO;
 	if (options->tun_local == -1)
 		options->tun_local = SSH_TUNID_ANY;
 	if (options->tun_remote == -1)
 		options->tun_remote = SSH_TUNID_ANY;
 	if (options->permit_local_command == -1)
 		options->permit_local_command = 0;
 	if (options->visual_host_key == -1)
 		options->visual_host_key = 0;
 	if (options->ip_qos_interactive == -1)
 		options->ip_qos_interactive = IPTOS_DSCP_AF21;
 	if (options->ip_qos_bulk == -1)
 		options->ip_qos_bulk = IPTOS_DSCP_CS1;
 	if (options->request_tty == -1)
 		options->request_tty = REQUEST_TTY_AUTO;
 	if (options->session_type == -1)
 		options->session_type = SESSION_TYPE_DEFAULT;
 	if (options->stdin_null == -1)
 		options->stdin_null = 0;
 	if (options->fork_after_authentication == -1)
 		options->fork_after_authentication = 0;
 	if (options->proxy_use_fdpass == -1)
 		options->proxy_use_fdpass = 0;
 	if (options->canonicalize_max_dots == -1)
 		options->canonicalize_max_dots = 1;
 	if (options->canonicalize_fallback_local == -1)
 		options->canonicalize_fallback_local = 1;
 	if (options->canonicalize_hostname == -1)
 		options->canonicalize_hostname = SSH_CANONICALISE_NO;
 	if (options->fingerprint_hash == -1)
 		options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
 #ifdef ENABLE_SK_INTERNAL
 	if (options->sk_provider == NULL)
 		options->sk_provider = xstrdup("internal");
 #else
 	if (options->sk_provider == NULL)
 		options->sk_provider = xstrdup("$SSH_SK_PROVIDER");
 #endif
 	if (options->required_rsa_size == -1)
 		options->required_rsa_size = SSH_RSA_MINIMUM_MODULUS_SIZE;
 	if (options->enable_escape_commandline == -1)
 		options->enable_escape_commandline = 0;
 	if (options->obscure_keystroke_timing_interval == -1) {
 		options->obscure_keystroke_timing_interval =
 		    SSH_KEYSTROKE_DEFAULT_INTERVAL_MS;
 	}
 
 	/* Expand KEX name lists */
 	all_cipher = cipher_alg_list(',', 0);
 	all_mac = mac_alg_list(',');
 	all_kex = kex_alg_list(',');
 	all_key = sshkey_alg_list(0, 0, 1, ',');
 	all_sig = sshkey_alg_list(0, 1, 1, ',');
 	/* remove unsupported algos from default lists */
 	def_cipher = match_filter_allowlist(KEX_CLIENT_ENCRYPT, all_cipher);
 	def_mac = match_filter_allowlist(KEX_CLIENT_MAC, all_mac);
 	def_kex = match_filter_allowlist(KEX_CLIENT_KEX, all_kex);
 	def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
 	def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
 #define ASSEMBLE(what, defaults, all) \
 	do { \
 		if ((r = kex_assemble_names(&options->what, \
 		    defaults, all)) != 0) { \
 			error_fr(r, "%s", #what); \
 			goto fail; \
 		} \
 	} while (0)
 	ASSEMBLE(ciphers, def_cipher, all_cipher);
 	ASSEMBLE(macs, def_mac, all_mac);
 	ASSEMBLE(kex_algorithms, def_kex, all_kex);
 	ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
 	ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
 	ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
 #undef ASSEMBLE
 
 #define CLEAR_ON_NONE(v) \
 	do { \
 		if (option_clear_or_none(v)) { \
 			free(v); \
 			v = NULL; \
 		} \
 	} while(0)
 #define CLEAR_ON_NONE_ARRAY(v, nv, none) \
 	do { \
 		if (options->nv == 1 && \
 		    strcasecmp(options->v[0], none) == 0) { \
 			free(options->v[0]); \
 			free(options->v); \
 			options->v = NULL; \
 			options->nv = 0; \
 		} \
 	} while (0)
 	CLEAR_ON_NONE(options->local_command);
 	CLEAR_ON_NONE(options->remote_command);
 	CLEAR_ON_NONE(options->proxy_command);
 	CLEAR_ON_NONE(options->control_path);
 	CLEAR_ON_NONE(options->revoked_host_keys);
 	CLEAR_ON_NONE(options->pkcs11_provider);
 	CLEAR_ON_NONE(options->sk_provider);
 	CLEAR_ON_NONE(options->known_hosts_command);
 	CLEAR_ON_NONE_ARRAY(channel_timeouts, num_channel_timeouts, "none");
 #undef CLEAR_ON_NONE
 #undef CLEAR_ON_NONE_ARRAY
 	if (options->jump_host != NULL &&
 	    strcmp(options->jump_host, "none") == 0 &&
 	    options->jump_port == 0 && options->jump_user == NULL) {
 		free(options->jump_host);
 		options->jump_host = NULL;
 	}
 	if (options->num_permitted_cnames == 1 &&
 	    !config_has_permitted_cnames(options)) {
 		/* clean up CanonicalizePermittedCNAMEs=none */
 		free(options->permitted_cnames[0].source_list);
 		free(options->permitted_cnames[0].target_list);
 		memset(options->permitted_cnames, '\0',
 		    sizeof(*options->permitted_cnames));
 		options->num_permitted_cnames = 0;
 	}
 	/* options->identity_agent distinguishes NULL from 'none' */
 	/* options->user will be set in the main program if appropriate */
 	/* options->hostname will be set in the main program if appropriate */
 	/* options->host_key_alias should not be set by default */
 	/* options->preferred_authentications will be set in ssh */
 
 	/* success */
 	ret = 0;
  fail:
 	free(all_cipher);
 	free(all_mac);
 	free(all_kex);
 	free(all_key);
 	free(all_sig);
 	free(def_cipher);
 	free(def_mac);
 	free(def_kex);
 	free(def_key);
 	free(def_sig);
 	return ret;
 }
 
 void
 free_options(Options *o)
 {
 	int i;
 
 	if (o == NULL)
 		return;
 
 #define FREE_ARRAY(type, n, a) \
 	do { \
 		type _i; \
 		for (_i = 0; _i < (n); _i++) \
 			free((a)[_i]); \
 	} while (0)
 
 	free(o->forward_agent_sock_path);
 	free(o->xauth_location);
 	FREE_ARRAY(u_int, o->num_log_verbose, o->log_verbose);
 	free(o->log_verbose);
 	free(o->ciphers);
 	free(o->macs);
 	free(o->hostkeyalgorithms);
 	free(o->kex_algorithms);
 	free(o->ca_sign_algorithms);
 	free(o->hostname);
 	free(o->host_key_alias);
 	free(o->proxy_command);
 	free(o->user);
 	FREE_ARRAY(u_int, o->num_system_hostfiles, o->system_hostfiles);
 	FREE_ARRAY(u_int, o->num_user_hostfiles, o->user_hostfiles);
 	free(o->preferred_authentications);
 	free(o->bind_address);
 	free(o->bind_interface);
 	free(o->pkcs11_provider);
 	free(o->sk_provider);
 	for (i = 0; i < o->num_identity_files; i++) {
 		free(o->identity_files[i]);
 		sshkey_free(o->identity_keys[i]);
 	}
 	for (i = 0; i < o->num_certificate_files; i++) {
 		free(o->certificate_files[i]);
 		sshkey_free(o->certificates[i]);
 	}
 	free(o->identity_agent);
 	for (i = 0; i < o->num_local_forwards; i++) {
 		free(o->local_forwards[i].listen_host);
 		free(o->local_forwards[i].listen_path);
 		free(o->local_forwards[i].connect_host);
 		free(o->local_forwards[i].connect_path);
 	}
 	free(o->local_forwards);
 	for (i = 0; i < o->num_remote_forwards; i++) {
 		free(o->remote_forwards[i].listen_host);
 		free(o->remote_forwards[i].listen_path);
 		free(o->remote_forwards[i].connect_host);
 		free(o->remote_forwards[i].connect_path);
 	}
 	free(o->remote_forwards);
 	free(o->stdio_forward_host);
 	FREE_ARRAY(u_int, o->num_send_env, o->send_env);
 	free(o->send_env);
 	FREE_ARRAY(u_int, o->num_setenv, o->setenv);
 	free(o->setenv);
 	free(o->control_path);
 	free(o->local_command);
 	free(o->remote_command);
 	FREE_ARRAY(int, o->num_canonical_domains, o->canonical_domains);
 	for (i = 0; i < o->num_permitted_cnames; i++) {
 		free(o->permitted_cnames[i].source_list);
 		free(o->permitted_cnames[i].target_list);
 	}
 	free(o->revoked_host_keys);
 	free(o->hostbased_accepted_algos);
 	free(o->pubkey_accepted_algos);
 	free(o->jump_user);
 	free(o->jump_host);
 	free(o->jump_extra);
 	free(o->ignored_unknown);
 	explicit_bzero(o, sizeof(*o));
 #undef FREE_ARRAY
 }
 
 struct fwdarg {
 	char *arg;
 	int ispath;
 };
 
 /*
  * parse_fwd_field
  * parses the next field in a port forwarding specification.
  * sets fwd to the parsed field and advances p past the colon
  * or sets it to NULL at end of string.
  * returns 0 on success, else non-zero.
  */
 static int
 parse_fwd_field(char **p, struct fwdarg *fwd)
 {
 	char *ep, *cp = *p;
 	int ispath = 0;
 
 	if (*cp == '\0') {
 		*p = NULL;
 		return -1;	/* end of string */
 	}
 
 	/*
 	 * A field escaped with square brackets is used literally.
 	 * XXX - allow ']' to be escaped via backslash?
 	 */
 	if (*cp == '[') {
 		/* find matching ']' */
 		for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
 			if (*ep == '/')
 				ispath = 1;
 		}
 		/* no matching ']' or not at end of field. */
 		if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
 			return -1;
 		/* NUL terminate the field and advance p past the colon */
 		*ep++ = '\0';
 		if (*ep != '\0')
 			*ep++ = '\0';
 		fwd->arg = cp + 1;
 		fwd->ispath = ispath;
 		*p = ep;
 		return 0;
 	}
 
 	for (cp = *p; *cp != '\0'; cp++) {
 		switch (*cp) {
 		case '\\':
 			memmove(cp, cp + 1, strlen(cp + 1) + 1);
 			if (*cp == '\0')
 				return -1;
 			break;
 		case '/':
 			ispath = 1;
 			break;
 		case ':':
 			*cp++ = '\0';
 			goto done;
 		}
 	}
 done:
 	fwd->arg = *p;
 	fwd->ispath = ispath;
 	*p = cp;
 	return 0;
 }
 
 /*
  * parse_forward
  * parses a string containing a port forwarding specification of the form:
  *   dynamicfwd == 0
  *	[listenhost:]listenport|listenpath:connecthost:connectport|connectpath
  *	listenpath:connectpath
  *   dynamicfwd == 1
  *	[listenhost:]listenport
  * returns number of arguments parsed or zero on error
  */
 int
 parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
 {
 	struct fwdarg fwdargs[4];
 	char *p, *cp;
 	int i, err;
 
 	memset(fwd, 0, sizeof(*fwd));
 	memset(fwdargs, 0, sizeof(fwdargs));
 
 	/*
 	 * We expand environment variables before checking if we think they're
 	 * paths so that if ${VAR} expands to a fully qualified path it is
 	 * treated as a path.
 	 */
 	cp = p = dollar_expand(&err, fwdspec);
 	if (p == NULL || err)
 		return 0;
 
 	/* skip leading spaces */
 	while (isspace((u_char)*cp))
 		cp++;
 
 	for (i = 0; i < 4; ++i) {
 		if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
 			break;
 	}
 
 	/* Check for trailing garbage */
 	if (cp != NULL && *cp != '\0') {
 		i = 0;	/* failure */
 	}
 
 	switch (i) {
 	case 1:
 		if (fwdargs[0].ispath) {
 			fwd->listen_path = xstrdup(fwdargs[0].arg);
 			fwd->listen_port = PORT_STREAMLOCAL;
 		} else {
 			fwd->listen_host = NULL;
 			fwd->listen_port = a2port(fwdargs[0].arg);
 		}
 		fwd->connect_host = xstrdup("socks");
 		break;
 
 	case 2:
 		if (fwdargs[0].ispath && fwdargs[1].ispath) {
 			fwd->listen_path = xstrdup(fwdargs[0].arg);
 			fwd->listen_port = PORT_STREAMLOCAL;
 			fwd->connect_path = xstrdup(fwdargs[1].arg);
 			fwd->connect_port = PORT_STREAMLOCAL;
 		} else if (fwdargs[1].ispath) {
 			fwd->listen_host = NULL;
 			fwd->listen_port = a2port(fwdargs[0].arg);
 			fwd->connect_path = xstrdup(fwdargs[1].arg);
 			fwd->connect_port = PORT_STREAMLOCAL;
 		} else {
 			fwd->listen_host = xstrdup(fwdargs[0].arg);
 			fwd->listen_port = a2port(fwdargs[1].arg);
 			fwd->connect_host = xstrdup("socks");
 		}
 		break;
 
 	case 3:
 		if (fwdargs[0].ispath) {
 			fwd->listen_path = xstrdup(fwdargs[0].arg);
 			fwd->listen_port = PORT_STREAMLOCAL;
 			fwd->connect_host = xstrdup(fwdargs[1].arg);
 			fwd->connect_port = a2port(fwdargs[2].arg);
 		} else if (fwdargs[2].ispath) {
 			fwd->listen_host = xstrdup(fwdargs[0].arg);
 			fwd->listen_port = a2port(fwdargs[1].arg);
 			fwd->connect_path = xstrdup(fwdargs[2].arg);
 			fwd->connect_port = PORT_STREAMLOCAL;
 		} else {
 			fwd->listen_host = NULL;
 			fwd->listen_port = a2port(fwdargs[0].arg);
 			fwd->connect_host = xstrdup(fwdargs[1].arg);
 			fwd->connect_port = a2port(fwdargs[2].arg);
 		}
 		break;
 
 	case 4:
 		fwd->listen_host = xstrdup(fwdargs[0].arg);
 		fwd->listen_port = a2port(fwdargs[1].arg);
 		fwd->connect_host = xstrdup(fwdargs[2].arg);
 		fwd->connect_port = a2port(fwdargs[3].arg);
 		break;
 	default:
 		i = 0; /* failure */
 	}
 
 	free(p);
 
 	if (dynamicfwd) {
 		if (!(i == 1 || i == 2))
 			goto fail_free;
 	} else {
 		if (!(i == 3 || i == 4)) {
 			if (fwd->connect_path == NULL &&
 			    fwd->listen_path == NULL)
 				goto fail_free;
 		}
 		if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
 			goto fail_free;
 	}
 
 	if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
 	    (!remotefwd && fwd->listen_port == 0))
 		goto fail_free;
 	if (fwd->connect_host != NULL &&
 	    strlen(fwd->connect_host) >= NI_MAXHOST)
 		goto fail_free;
 	/*
 	 * XXX - if connecting to a remote socket, max sun len may not
 	 * match this host
 	 */
 	if (fwd->connect_path != NULL &&
 	    strlen(fwd->connect_path) >= PATH_MAX_SUN)
 		goto fail_free;
 	if (fwd->listen_host != NULL &&
 	    strlen(fwd->listen_host) >= NI_MAXHOST)
 		goto fail_free;
 	if (fwd->listen_path != NULL &&
 	    strlen(fwd->listen_path) >= PATH_MAX_SUN)
 		goto fail_free;
 
 	return (i);
 
  fail_free:
 	free(fwd->connect_host);
 	fwd->connect_host = NULL;
 	free(fwd->connect_path);
 	fwd->connect_path = NULL;
 	free(fwd->listen_host);
 	fwd->listen_host = NULL;
 	free(fwd->listen_path);
 	fwd->listen_path = NULL;
 	return (0);
 }
 
 int
 parse_jump(const char *s, Options *o, int active)
 {
 	char *orig, *sdup, *cp;
 	char *host = NULL, *user = NULL;
 	int r, ret = -1, port = -1, first;
 
 	active &= o->proxy_command == NULL && o->jump_host == NULL;
 
 	orig = sdup = xstrdup(s);
 
 	/* Remove comment and trailing whitespace */
 	if ((cp = strchr(orig, '#')) != NULL)
 		*cp = '\0';
 	rtrim(orig);
 
 	first = active;
 	do {
 		if (strcasecmp(s, "none") == 0)
 			break;
 		if ((cp = strrchr(sdup, ',')) == NULL)
 			cp = sdup; /* last */
 		else
 			*cp++ = '\0';
 
 		if (first) {
 			/* First argument and configuration is active */
 			r = parse_ssh_uri(cp, &user, &host, &port);
 			if (r == -1 || (r == 1 &&
 			    parse_user_host_port(cp, &user, &host, &port) != 0))
 				goto out;
 		} else {
 			/* Subsequent argument or inactive configuration */
 			r = parse_ssh_uri(cp, NULL, NULL, NULL);
 			if (r == -1 || (r == 1 &&
 			    parse_user_host_port(cp, NULL, NULL, NULL) != 0))
 				goto out;
 		}
 		first = 0; /* only check syntax for subsequent hosts */
 	} while (cp != sdup);
 	/* success */
 	if (active) {
 		if (strcasecmp(s, "none") == 0) {
 			o->jump_host = xstrdup("none");
 			o->jump_port = 0;
 		} else {
 			o->jump_user = user;
 			o->jump_host = host;
 			o->jump_port = port;
 			o->proxy_command = xstrdup("none");
 			user = host = NULL;
 			if ((cp = strrchr(s, ',')) != NULL && cp != s) {
 				o->jump_extra = xstrdup(s);
 				o->jump_extra[cp - s] = '\0';
 			}
 		}
 	}
 	ret = 0;
  out:
 	free(orig);
 	free(user);
 	free(host);
 	return ret;
 }
 
 int
 parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
 {
 	char *user = NULL, *host = NULL, *path = NULL;
 	int r, port;
 
 	r = parse_uri("ssh", uri, &user, &host, &port, &path);
 	if (r == 0 && path != NULL)
 		r = -1;		/* path not allowed */
 	if (r == 0) {
 		if (userp != NULL) {
 			*userp = user;
 			user = NULL;
 		}
 		if (hostp != NULL) {
 			*hostp = host;
 			host = NULL;
 		}
 		if (portp != NULL)
 			*portp = port;
 	}
 	free(user);
 	free(host);
 	free(path);
 	return r;
 }
 
 /* XXX the following is a near-vebatim copy from servconf.c; refactor */
 static const char *
 fmt_multistate_int(int val, const struct multistate *m)
 {
 	u_int i;
 
 	for (i = 0; m[i].key != NULL; i++) {
 		if (m[i].value == val)
 			return m[i].key;
 	}
 	return "UNKNOWN";
 }
 
 static const char *
 fmt_intarg(OpCodes code, int val)
 {
 	if (val == -1)
 		return "unset";
 	switch (code) {
 	case oAddressFamily:
 		return fmt_multistate_int(val, multistate_addressfamily);
 	case oVerifyHostKeyDNS:
 	case oUpdateHostkeys:
 		return fmt_multistate_int(val, multistate_yesnoask);
 	case oStrictHostKeyChecking:
 		return fmt_multistate_int(val, multistate_strict_hostkey);
 	case oControlMaster:
 		return fmt_multistate_int(val, multistate_controlmaster);
 	case oTunnel:
 		return fmt_multistate_int(val, multistate_tunnel);
 	case oRequestTTY:
 		return fmt_multistate_int(val, multistate_requesttty);
 	case oSessionType:
 		return fmt_multistate_int(val, multistate_sessiontype);
 	case oCanonicalizeHostname:
 		return fmt_multistate_int(val, multistate_canonicalizehostname);
 	case oAddKeysToAgent:
 		return fmt_multistate_int(val, multistate_yesnoaskconfirm);
 	case oPubkeyAuthentication:
 		return fmt_multistate_int(val, multistate_pubkey_auth);
 	case oFingerprintHash:
 		return ssh_digest_alg_name(val);
 	default:
 		switch (val) {
 		case 0:
 			return "no";
 		case 1:
 			return "yes";
 		default:
 			return "UNKNOWN";
 		}
 	}
 }
 
 static const char *
 lookup_opcode_name(OpCodes code)
 {
 	u_int i;
 
 	for (i = 0; keywords[i].name != NULL; i++)
 		if (keywords[i].opcode == code)
 			return(keywords[i].name);
 	return "UNKNOWN";
 }
 
 static void
 dump_cfg_int(OpCodes code, int val)
 {
 	if (code == oObscureKeystrokeTiming) {
 		if (val == 0) {
 			printf("%s no\n", lookup_opcode_name(code));
 			return;
 		} else if (val == SSH_KEYSTROKE_DEFAULT_INTERVAL_MS) {
 			printf("%s yes\n", lookup_opcode_name(code));
 			return;
 		}
 		/* FALLTHROUGH */
 	}
 	printf("%s %d\n", lookup_opcode_name(code), val);
 }
 
 static void
 dump_cfg_fmtint(OpCodes code, int val)
 {
 	printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
 }
 
 static void
 dump_cfg_string(OpCodes code, const char *val)
 {
 	if (val == NULL)
 		return;
 	printf("%s %s\n", lookup_opcode_name(code), val);
 }
 
 static void
 dump_cfg_strarray(OpCodes code, u_int count, char **vals)
 {
 	u_int i;
 
 	for (i = 0; i < count; i++)
 		printf("%s %s\n", lookup_opcode_name(code), vals[i]);
 }
 
 static void
 dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
 {
 	u_int i;
 
 	printf("%s", lookup_opcode_name(code));
 	if (count == 0)
 		printf(" none");
 	for (i = 0; i < count; i++)
 		printf(" %s",  vals[i]);
 	printf("\n");
 }
 
 static void
 dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
 {
 	const struct Forward *fwd;
 	u_int i;
 
 	/* oDynamicForward */
 	for (i = 0; i < count; i++) {
 		fwd = &fwds[i];
 		if (code == oDynamicForward && fwd->connect_host != NULL &&
 		    strcmp(fwd->connect_host, "socks") != 0)
 			continue;
 		if (code == oLocalForward && fwd->connect_host != NULL &&
 		    strcmp(fwd->connect_host, "socks") == 0)
 			continue;
 		printf("%s", lookup_opcode_name(code));
 		if (fwd->listen_port == PORT_STREAMLOCAL)
 			printf(" %s", fwd->listen_path);
 		else if (fwd->listen_host == NULL)
 			printf(" %d", fwd->listen_port);
 		else {
 			printf(" [%s]:%d",
 			    fwd->listen_host, fwd->listen_port);
 		}
 		if (code != oDynamicForward) {
 			if (fwd->connect_port == PORT_STREAMLOCAL)
 				printf(" %s", fwd->connect_path);
 			else if (fwd->connect_host == NULL)
 				printf(" %d", fwd->connect_port);
 			else {
 				printf(" [%s]:%d",
 				    fwd->connect_host, fwd->connect_port);
 			}
 		}
 		printf("\n");
 	}
 }
 
 void
 dump_client_config(Options *o, const char *host)
 {
 	int i, r;
 	char buf[8], *all_key;
 
 	/*
 	 * Expand HostKeyAlgorithms name lists. This isn't handled in
 	 * fill_default_options() like the other algorithm lists because
 	 * the host key algorithms are by default dynamically chosen based
 	 * on the host's keys found in known_hosts.
 	 */
 	all_key = sshkey_alg_list(0, 0, 1, ',');
 	if ((r = kex_assemble_names(&o->hostkeyalgorithms, kex_default_pk_alg(),
 	    all_key)) != 0)
 		fatal_fr(r, "expand HostKeyAlgorithms");
 	free(all_key);
 
 	/* Most interesting options first: user, host, port */
 	dump_cfg_string(oHost, o->host_arg);
 	dump_cfg_string(oUser, o->user);
 	dump_cfg_string(oHostname, host);
 	dump_cfg_int(oPort, o->port);
 
 	/* Flag options */
 	dump_cfg_fmtint(oAddressFamily, o->address_family);
 	dump_cfg_fmtint(oBatchMode, o->batch_mode);
 	dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
 	dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
 	dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
 	dump_cfg_fmtint(oCompression, o->compression);
 	dump_cfg_fmtint(oControlMaster, o->control_master);
 	dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
 	dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
 	dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
 	dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
 	dump_cfg_fmtint(oForwardX11, o->forward_x11);
 	dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
 	dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
 #ifdef GSSAPI
 	dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
 	dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
 #endif /* GSSAPI */
 	dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
 	dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
 	dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
 	dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
 	dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
 	dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
 	dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
 	dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
 	dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
 	dump_cfg_fmtint(oRequestTTY, o->request_tty);
 	dump_cfg_fmtint(oSessionType, o->session_type);
 	dump_cfg_fmtint(oStdinNull, o->stdin_null);
 	dump_cfg_fmtint(oForkAfterAuthentication, o->fork_after_authentication);
 	dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
 	dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
 	dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
 	dump_cfg_fmtint(oTunnel, o->tun_open);
 	dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
 	dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
 	dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
 	dump_cfg_fmtint(oEnableEscapeCommandline, o->enable_escape_commandline);
 
 	/* Integer options */
 	dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
 	dump_cfg_int(oConnectionAttempts, o->connection_attempts);
 	dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
 	dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
 	dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
 	dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
 	dump_cfg_int(oRequiredRSASize, o->required_rsa_size);
 	dump_cfg_int(oObscureKeystrokeTiming,
 	    o->obscure_keystroke_timing_interval);
 
 	/* String options */
 	dump_cfg_string(oBindAddress, o->bind_address);
 	dump_cfg_string(oBindInterface, o->bind_interface);
 	dump_cfg_string(oCiphers, o->ciphers);
 	dump_cfg_string(oControlPath, o->control_path);
 	dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
 	dump_cfg_string(oHostKeyAlias, o->host_key_alias);
 	dump_cfg_string(oHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
 	dump_cfg_string(oIdentityAgent, o->identity_agent);
 	dump_cfg_string(oIgnoreUnknown, o->ignored_unknown);
 	dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
 	dump_cfg_string(oKexAlgorithms, o->kex_algorithms);
 	dump_cfg_string(oCASignatureAlgorithms, o->ca_sign_algorithms);
 	dump_cfg_string(oLocalCommand, o->local_command);
 	dump_cfg_string(oRemoteCommand, o->remote_command);
 	dump_cfg_string(oLogLevel, log_level_name(o->log_level));
 	dump_cfg_string(oMacs, o->macs);
 #ifdef ENABLE_PKCS11
 	dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
 #endif
 	dump_cfg_string(oSecurityKeyProvider, o->sk_provider);
 	dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
 	dump_cfg_string(oPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
 	dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
 	dump_cfg_string(oXAuthLocation, o->xauth_location);
 	dump_cfg_string(oKnownHostsCommand, o->known_hosts_command);
 	dump_cfg_string(oTag, o->tag);
 
 	/* Forwards */
 	dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
 	dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
 	dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
 
 	/* String array options */
 	dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
 	dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
 	dump_cfg_strarray(oCertificateFile, o->num_certificate_files, o->certificate_files);
 	dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
 	dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
 	dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
 	dump_cfg_strarray(oSetEnv, o->num_setenv, o->setenv);
 	dump_cfg_strarray_oneline(oLogVerbose,
 	    o->num_log_verbose, o->log_verbose);
 	dump_cfg_strarray_oneline(oChannelTimeout,
 	    o->num_channel_timeouts, o->channel_timeouts);
 
 	/* Special cases */
 
 	/* PermitRemoteOpen */
 	if (o->num_permitted_remote_opens == 0)
 		printf("%s any\n", lookup_opcode_name(oPermitRemoteOpen));
 	else
 		dump_cfg_strarray_oneline(oPermitRemoteOpen,
 		    o->num_permitted_remote_opens, o->permitted_remote_opens);
 
 	/* AddKeysToAgent */
 	if (o->add_keys_to_agent_lifespan <= 0)
 		dump_cfg_fmtint(oAddKeysToAgent, o->add_keys_to_agent);
 	else {
 		printf("addkeystoagent%s %d\n",
 		    o->add_keys_to_agent == 3 ? " confirm" : "",
 		    o->add_keys_to_agent_lifespan);
 	}
 
 	/* oForwardAgent */
 	if (o->forward_agent_sock_path == NULL)
 		dump_cfg_fmtint(oForwardAgent, o->forward_agent);
 	else
 		dump_cfg_string(oForwardAgent, o->forward_agent_sock_path);
 
 	/* oConnectTimeout */
 	if (o->connection_timeout == -1)
 		printf("connecttimeout none\n");
 	else
 		dump_cfg_int(oConnectTimeout, o->connection_timeout);
 
 	/* oTunnelDevice */
 	printf("tunneldevice");
 	if (o->tun_local == SSH_TUNID_ANY)
 		printf(" any");
 	else
 		printf(" %d", o->tun_local);
 	if (o->tun_remote == SSH_TUNID_ANY)
 		printf(":any");
 	else
 		printf(":%d", o->tun_remote);
 	printf("\n");
 
 	/* oCanonicalizePermittedCNAMEs */
 	printf("canonicalizePermittedcnames");
 	if (o->num_permitted_cnames == 0)
 		printf(" none");
 	for (i = 0; i < o->num_permitted_cnames; i++) {
 		printf(" %s:%s", o->permitted_cnames[i].source_list,
 		    o->permitted_cnames[i].target_list);
 	}
 	printf("\n");
 
 	/* oControlPersist */
 	if (o->control_persist == 0 || o->control_persist_timeout == 0)
 		dump_cfg_fmtint(oControlPersist, o->control_persist);
 	else
 		dump_cfg_int(oControlPersist, o->control_persist_timeout);
 
 	/* oEscapeChar */
 	if (o->escape_char == SSH_ESCAPECHAR_NONE)
 		printf("escapechar none\n");
 	else {
 		vis(buf, o->escape_char, VIS_WHITE, 0);
 		printf("escapechar %s\n", buf);
 	}
 
 	/* oIPQoS */
 	printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
 	printf("%s\n", iptos2str(o->ip_qos_bulk));
 
 	/* oRekeyLimit */
 	printf("rekeylimit %llu %d\n",
 	    (unsigned long long)o->rekey_limit, o->rekey_interval);
 
 	/* oStreamLocalBindMask */
 	printf("streamlocalbindmask 0%o\n",
 	    o->fwd_opts.streamlocal_bind_mask);
 
 	/* oLogFacility */
 	printf("syslogfacility %s\n", log_facility_name(o->log_facility));
 
 	/* oProxyCommand / oProxyJump */
 	if (o->jump_host == NULL)
 		dump_cfg_string(oProxyCommand, o->proxy_command);
 	else {
 		/* Check for numeric addresses */
 		i = strchr(o->jump_host, ':') != NULL ||
 		    strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
 		snprintf(buf, sizeof(buf), "%d", o->jump_port);
 		printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
 		    /* optional additional jump spec */
 		    o->jump_extra == NULL ? "" : o->jump_extra,
 		    o->jump_extra == NULL ? "" : ",",
 		    /* optional user */
 		    o->jump_user == NULL ? "" : o->jump_user,
 		    o->jump_user == NULL ? "" : "@",
 		    /* opening [ if hostname is numeric */
 		    i ? "[" : "",
 		    /* mandatory hostname */
 		    o->jump_host,
 		    /* closing ] if hostname is numeric */
 		    i ? "]" : "",
 		    /* optional port number */
 		    o->jump_port <= 0 ? "" : ":",
 		    o->jump_port <= 0 ? "" : buf);
 	}
 }
diff --git a/readconf.h b/readconf.h
index ff7180cd0c6c..9447d5d6e53d 100644
--- a/readconf.h
+++ b/readconf.h
@@ -1,258 +1,258 @@
-/* $OpenBSD: readconf.h,v 1.154 2023/10/12 02:18:18 djm Exp $ */
+/* $OpenBSD: readconf.h,v 1.156 2024/03/04 02:16:11 djm Exp $ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Functions for reading the configuration file.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #ifndef READCONF_H
 #define READCONF_H
 
 /* Data structure for representing option data. */
 
 #define SSH_MAX_HOSTS_FILES	32
 #define MAX_CANON_DOMAINS	32
 #define PATH_MAX_SUN		(sizeof((struct sockaddr_un *)0)->sun_path)
 
 struct allowed_cname {
 	char *source_list;
 	char *target_list;
 };
 
 typedef struct {
 	char   *host_arg;	/* Host arg as specified on command line. */
 	int     forward_agent;	/* Forward authentication agent. */
 	char   *forward_agent_sock_path; /* Optional path of the agent. */
 	int     forward_x11;	/* Forward X11 display. */
 	int     forward_x11_timeout;	/* Expiration for Cookies */
 	int     forward_x11_trusted;	/* Trust Forward X11 display. */
 	int     exit_on_forward_failure;	/* Exit if bind(2) fails for -L/-R */
 	char   *xauth_location;	/* Location for xauth program */
 	struct ForwardOptions fwd_opts;	/* forwarding options */
 	int     pubkey_authentication;	/* Try ssh2 pubkey authentication. */
 	int     hostbased_authentication;	/* ssh2's rhosts_rsa */
 	int     gss_authentication;	/* Try GSS authentication */
 	int     gss_deleg_creds;	/* Delegate GSS credentials */
 	int     password_authentication;	/* Try password
 						 * authentication. */
 	int     kbd_interactive_authentication; /* Try keyboard-interactive auth. */
 	char	*kbd_interactive_devices; /* Keyboard-interactive auth devices. */
 	int     batch_mode;	/* Batch mode: do not ask for passwords. */
 	int     check_host_ip;	/* Also keep track of keys for IP address */
 	int     strict_host_key_checking;	/* Strict host key checking. */
 	int     compression;	/* Compress packets in both directions. */
 	int     tcp_keep_alive;	/* Set SO_KEEPALIVE. */
 	int	ip_qos_interactive;	/* IP ToS/DSCP/class for interactive */
 	int	ip_qos_bulk;		/* IP ToS/DSCP/class for bulk traffic */
 	SyslogFacility log_facility;	/* Facility for system logging. */
 	LogLevel log_level;	/* Level for logging. */
 	u_int	num_log_verbose;	/* Verbose log overrides */
 	char   **log_verbose;
 	int     port;		/* Port to connect. */
 	int     address_family;
 	int     connection_attempts;	/* Max attempts (seconds) before
 					 * giving up */
 	int     connection_timeout;	/* Max time (seconds) before
 					 * aborting connection attempt */
 	int     number_of_password_prompts;	/* Max number of password
 						 * prompts. */
 	char   *ciphers;	/* SSH2 ciphers in order of preference. */
 	char   *macs;		/* SSH2 macs in order of preference. */
 	char   *hostkeyalgorithms;	/* SSH2 server key types in order of preference. */
 	char   *kex_algorithms;	/* SSH2 kex methods in order of preference. */
 	char   *ca_sign_algorithms;	/* Allowed CA signature algorithms */
 	char   *hostname;	/* Real host to connect. */
 	char   *tag;		/* Configuration tag name. */
 	char   *host_key_alias;	/* hostname alias for .ssh/known_hosts */
 	char   *proxy_command;	/* Proxy command for connecting the host. */
 	char   *user;		/* User to log in as. */
 	int     escape_char;	/* Escape character; -2 = none */
 
 	u_int	num_system_hostfiles;	/* Paths for /etc/ssh/ssh_known_hosts */
 	char   *system_hostfiles[SSH_MAX_HOSTS_FILES];
 	u_int	num_user_hostfiles;	/* Path for $HOME/.ssh/known_hosts */
 	char   *user_hostfiles[SSH_MAX_HOSTS_FILES];
 	char   *preferred_authentications;
 	char   *bind_address;	/* local socket address for connection to sshd */
 	char   *bind_interface;	/* local interface for bind address */
 	char   *pkcs11_provider; /* PKCS#11 provider */
 	char   *sk_provider; /* Security key provider */
 	int	verify_host_key_dns;	/* Verify host key using DNS */
 
-	int     num_identity_files;	/* Number of files for RSA/DSA identities. */
+	int     num_identity_files;	/* Number of files for identities. */
 	char   *identity_files[SSH_MAX_IDENTITY_FILES];
 	int    identity_file_userprovided[SSH_MAX_IDENTITY_FILES];
 	struct sshkey *identity_keys[SSH_MAX_IDENTITY_FILES];
 
 	int	num_certificate_files; /* Number of extra certificates for ssh. */
 	char	*certificate_files[SSH_MAX_CERTIFICATE_FILES];
 	int	certificate_file_userprovided[SSH_MAX_CERTIFICATE_FILES];
 	struct sshkey *certificates[SSH_MAX_CERTIFICATE_FILES];
 
 	int	add_keys_to_agent;
 	int	add_keys_to_agent_lifespan;
 	char   *identity_agent;		/* Optional path to ssh-agent socket */
 
 	/* Local TCP/IP forward requests. */
 	int     num_local_forwards;
 	struct Forward *local_forwards;
 
 	/* Remote TCP/IP forward requests. */
 	int     num_remote_forwards;
 	struct Forward *remote_forwards;
 	int	clear_forwardings;
 
 	/* Restrict remote dynamic forwarding */
 	char  **permitted_remote_opens;
 	u_int	num_permitted_remote_opens;
 
 	/* stdio forwarding (-W) host and port */
 	char   *stdio_forward_host;
 	int	stdio_forward_port;
 
 	int	enable_ssh_keysign;
 	int64_t rekey_limit;
 	int	rekey_interval;
 	int	no_host_authentication_for_localhost;
 	int	identities_only;
 	int	server_alive_interval;
 	int	server_alive_count_max;
 
 	u_int	num_send_env;
 	char	**send_env;
 	u_int	num_setenv;
 	char	**setenv;
 
 	char	*control_path;
 	int	control_master;
 	int     control_persist; /* ControlPersist flag */
 	int     control_persist_timeout; /* ControlPersist timeout (seconds) */
 
 	int	hash_known_hosts;
 
 	int	tun_open;	/* tun(4) */
 	int     tun_local;	/* force tun device (optional) */
 	int     tun_remote;	/* force tun device (optional) */
 
 	char	*local_command;
 	int	permit_local_command;
 	char	*remote_command;
 	int	visual_host_key;
 
 	int	request_tty;
 	int	session_type;
 	int	stdin_null;
 	int	fork_after_authentication;
 
 	int	proxy_use_fdpass;
 
 	int	num_canonical_domains;
-	char	*canonical_domains[MAX_CANON_DOMAINS];
+	char	**canonical_domains;
 	int	canonicalize_hostname;
 	int	canonicalize_max_dots;
 	int	canonicalize_fallback_local;
 	int	num_permitted_cnames;
-	struct allowed_cname permitted_cnames[MAX_CANON_DOMAINS];
+	struct allowed_cname *permitted_cnames;
 
 	char	*revoked_host_keys;
 
 	int	 fingerprint_hash;
 
 	int	 update_hostkeys; /* one of SSH_UPDATE_HOSTKEYS_* */
 
 	char   *hostbased_accepted_algos;
 	char   *pubkey_accepted_algos;
 
 	char   *jump_user;
 	char   *jump_host;
 	int	jump_port;
 	char   *jump_extra;
 
 	char   *known_hosts_command;
 
 	int	required_rsa_size;	/* minimum size of RSA keys */
 	int	enable_escape_commandline;	/* ~C commandline */
 	int	obscure_keystroke_timing_interval;
 
 	char	**channel_timeouts;	/* inactivity timeout by channel type */
 	u_int	num_channel_timeouts;
 
 	char	*ignored_unknown; /* Pattern list of unknown tokens to ignore */
 }       Options;
 
 #define SSH_PUBKEY_AUTH_NO	0x00
 #define SSH_PUBKEY_AUTH_UNBOUND	0x01
 #define SSH_PUBKEY_AUTH_HBOUND	0x02
 #define SSH_PUBKEY_AUTH_ALL	0x03
 
 #define SSH_CANONICALISE_NO	0
 #define SSH_CANONICALISE_YES	1
 #define SSH_CANONICALISE_ALWAYS	2
 
 #define SSHCTL_MASTER_NO	0
 #define SSHCTL_MASTER_YES	1
 #define SSHCTL_MASTER_AUTO	2
 #define SSHCTL_MASTER_ASK	3
 #define SSHCTL_MASTER_AUTO_ASK	4
 
 #define REQUEST_TTY_AUTO	0
 #define REQUEST_TTY_NO		1
 #define REQUEST_TTY_YES		2
 #define REQUEST_TTY_FORCE	3
 
 #define SESSION_TYPE_NONE	0
 #define SESSION_TYPE_SUBSYSTEM	1
 #define SESSION_TYPE_DEFAULT	2
 
 #define SSHCONF_CHECKPERM	1  /* check permissions on config file */
 #define SSHCONF_USERCONF	2  /* user provided config file not system */
 #define SSHCONF_FINAL		4  /* Final pass over config, after canon. */
 #define SSHCONF_NEVERMATCH	8  /* Match/Host never matches; internal only */
 
 #define SSH_UPDATE_HOSTKEYS_NO	0
 #define SSH_UPDATE_HOSTKEYS_YES	1
 #define SSH_UPDATE_HOSTKEYS_ASK	2
 
 #define SSH_STRICT_HOSTKEY_OFF	0
 #define SSH_STRICT_HOSTKEY_NEW	1
 #define SSH_STRICT_HOSTKEY_YES	2
 #define SSH_STRICT_HOSTKEY_ASK	3
 
 /* ObscureKeystrokes parameters */
 #define SSH_KEYSTROKE_DEFAULT_INTERVAL_MS	20
 #define SSH_KEYSTROKE_CHAFF_MIN_MS		1024
 #define SSH_KEYSTROKE_CHAFF_RNG_MS		2048
 
 const char *kex_default_pk_alg(void);
 char	*ssh_connection_hash(const char *thishost, const char *host,
     const char *portstr, const char *user, const char *jump_host);
 void     initialize_options(Options *);
 int      fill_default_options(Options *);
 void	 fill_default_options_for_canonicalization(Options *);
 void	 free_options(Options *o);
 int	 process_config_line(Options *, struct passwd *, const char *,
     const char *, char *, const char *, int, int *, int);
 int	 read_config_file(const char *, struct passwd *, const char *,
     const char *, Options *, int, int *);
 int	 parse_forward(struct Forward *, const char *, int, int);
 int	 parse_jump(const char *, Options *, int);
 int	 parse_ssh_uri(const char *, char **, char **, int *);
 int	 default_ssh_port(void);
 int	 option_clear_or_none(const char *);
 int	 config_has_permitted_cnames(Options *);
 void	 dump_client_config(Options *o, const char *host);
 
 void	 add_local_forward(Options *, const struct Forward *);
 void	 add_remote_forward(Options *, const struct Forward *);
 void	 add_identity_file(Options *, const char *, const char *, int);
 void	 add_certificate_file(Options *, const char *, int);
 
 #endif				/* READCONF_H */
diff --git a/regress/Makefile b/regress/Makefile
index f5cb9bd4779d..c9a495f6f4cc 100644
--- a/regress/Makefile
+++ b/regress/Makefile
@@ -1,293 +1,314 @@
-#	$OpenBSD: Makefile,v 1.131 2023/12/18 14:50:08 djm Exp $
+#	$OpenBSD: Makefile,v 1.133 2024/01/11 04:50:28 djm Exp $
 
 tests:		prep file-tests t-exec unit
 
 REGRESS_TARGETS=	t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12
 
 # File based tests
 file-tests: $(REGRESS_TARGETS)
 
 # Interop tests are not run by default
 interop interop-tests: t-exec-interop
 
 extra extra-tests: t-extra
 
 prep:
 	test "x${USE_VALGRIND}" = "x" || mkdir -p $(OBJ)/valgrind-out
 
 clean:
 	for F in $(CLEANFILES); do rm -f $(OBJ)$$F; done
 	rm -rf $(OBJ).putty
 	rm -rf $(OBJ).dropbear
 
 distclean:	clean
 
 LTESTS= 	connect \
 		proxy-connect \
 		sshfp-connect \
 		connect-privsep \
 		connect-uri \
 		proto-version \
 		proto-mismatch \
 		exit-status \
 		exit-status-signal \
 		envpass \
 		transfer \
 		banner \
 		rekey \
 		dhgex \
 		stderr-data \
 		stderr-after-eof \
 		broken-pipe \
 		try-ciphers \
 		yes-head \
 		login-timeout \
 		agent \
 		agent-getpeereid \
 		agent-timeout \
 		agent-ptrace \
 		agent-subprocess \
 		keyscan \
 		keygen-change \
 		keygen-comment \
 		keygen-convert \
 		keygen-knownhosts \
 		keygen-moduli \
 		keygen-sshfp \
 		key-options \
 		scp \
 		scp3 \
 		scp-uri \
 		sftp \
 		sftp-chroot \
 		sftp-cmds \
 		sftp-badcmds \
 		sftp-batch \
 		sftp-glob \
 		sftp-perm \
 		sftp-uri \
 		reconfigure \
 		dynamic-forward \
 		forwarding \
 		multiplex \
 		reexec \
 		brokenkeys \
 		sshcfgparse \
 		cfgparse \
 		cfgmatch \
 		cfgmatchlisten \
 		percent \
 		addrmatch \
 		localcommand \
 		forcecommand \
 		portnum \
 		keytype \
 		kextype \
 		cert-hostkey \
 		cert-userkey \
 		host-expand \
 		keys-command \
 		forward-control \
 		integrity \
 		krl \
 		multipubkey \
 		limit-keytype \
 		hostkey-agent \
 		hostkey-rotate \
 		principals-command \
 		cert-file \
 		cfginclude \
 		servcfginclude \
 		allow-deny-users \
 		authinfo \
 		sshsig \
 		knownhosts \
 		knownhosts-command \
 		agent-restrict \
 		hostbased \
 		channel-timeout \
 		connection-timeout \
 		match-subsystem \
 		agent-pkcs11-restrict \
 		agent-pkcs11-cert
 
 INTEROP_TESTS=	putty-transfer putty-ciphers putty-kex conch-ciphers
 INTEROP_TESTS+=	dropbear-ciphers dropbear-kex
 #INTEROP_TESTS+=ssh-com ssh-com-client ssh-com-keygen ssh-com-sftp
 
 EXTRA_TESTS=	agent-pkcs11
 #EXTRA_TESTS+= 	cipher-speed
 
 USERNAME=		${LOGNAME}
 CLEANFILES=	*.core actual agent-key.* authorized_keys_${USERNAME} \
 		authorized_keys_${USERNAME}.* \
 		authorized_principals_${USERNAME} \
 		banner.in banner.out cert_host_key* cert_user_key* \
 		copy.1 copy.2 data ed25519-agent ed25519-agent* \
 		ed25519-agent.pub ed25519 ed25519.pub empty.in \
 		expect failed-regress.log failed-ssh.log failed-sshd.log \
 		hkr.* host.ecdsa-sha2-nistp256 host.ecdsa-sha2-nistp384 \
 		host.ecdsa-sha2-nistp521 host.ssh-dss host.ssh-ed25519 \
 		host.ssh-rsa host_ca_key* host_krl_* host_revoked_* key.* \
 		key.dsa-* key.ecdsa-* key.ed25519-512 \
 		key.ed25519-512.pub key.rsa-* keys-command-args kh.* askpass \
 		known_hosts known_hosts-cert known_hosts.* krl-* ls.copy \
 		modpipe netcat no_identity_config \
 		pidfile putty.rsa2 ready regress.log remote_pid \
 		revoked-* rsa rsa-agent rsa-agent.pub rsa.pub rsa_ssh2_cr.prv \
 		rsa_ssh2_crnl.prv scp-ssh-wrapper.exe \
 		scp-ssh-wrapper.scp setuid-allowed sftp-server.log \
 		sftp-server.sh sftp.log ssh-log-wrapper.sh ssh.log \
 		ssh-agent.log ssh-add.log slow-sftp-server.sh \
 		ssh-rsa_oldfmt knownhosts_command \
 		ssh_config ssh_config.* ssh_proxy ssh_proxy_bak \
 		ssh_proxy_* sshd.log sshd_config sshd_config.* \
 		sshd_config.* sshd_proxy sshd_proxy.* sshd_proxy_bak \
 		sshd_proxy_orig t10.out t10.out.pub t12.out t12.out.pub \
 		t2.out t3.out t6.out1 t6.out2 t7.out t7.out.pub \
 		t8.out t8.out.pub t9.out t9.out.pub \
 		timestamp testdata user_*key* user_ca* user_key*
 
 # Enable all malloc(3) randomisations and checks
 TEST_ENV=      "MALLOC_OPTIONS=CFGJRSUX"
 
 TEST_SSH_SSHKEYGEN?=ssh-keygen
 
 CPPFLAGS=-I..
 
 t1:
-	${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/rsa_ssh2.prv | diff - ${.CURDIR}/rsa_openssh.prv
-	tr '\n' '\r' <${.CURDIR}/rsa_ssh2.prv > ${.OBJDIR}/rsa_ssh2_cr.prv
-	${TEST_SSH_SSHKEYGEN} -if ${.OBJDIR}/rsa_ssh2_cr.prv | diff - ${.CURDIR}/rsa_openssh.prv
-	awk '{print $$0 "\r"}' ${.CURDIR}/rsa_ssh2.prv > ${.OBJDIR}/rsa_ssh2_crnl.prv
-	${TEST_SSH_SSHKEYGEN} -if ${.OBJDIR}/rsa_ssh2_crnl.prv | diff - ${.CURDIR}/rsa_openssh.prv
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-rsa" ; then \
+		${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/rsa_ssh2.prv | diff - ${.CURDIR}/rsa_openssh.prv ; \
+		tr '\n' '\r' <${.CURDIR}/rsa_ssh2.prv > ${.OBJDIR}/rsa_ssh2_cr.prv ; \
+		${TEST_SSH_SSHKEYGEN} -if ${.OBJDIR}/rsa_ssh2_cr.prv | diff - ${.CURDIR}/rsa_openssh.prv ; \
+		awk '{print $$0 "\r"}' ${.CURDIR}/rsa_ssh2.prv > ${.OBJDIR}/rsa_ssh2_crnl.prv ; \
+		${TEST_SSH_SSHKEYGEN} -if ${.OBJDIR}/rsa_ssh2_crnl.prv | diff - ${.CURDIR}/rsa_openssh.prv ; \
+	fi
 
 t2:
-	cat ${.CURDIR}/rsa_openssh.prv > $(OBJ)/t2.out
-	chmod 600 $(OBJ)/t2.out
-	${TEST_SSH_SSHKEYGEN} -yf $(OBJ)/t2.out | diff - ${.CURDIR}/rsa_openssh.pub
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-rsa" ; then \
+		cat ${.CURDIR}/rsa_openssh.prv > $(OBJ)/t2.out ; \
+		chmod 600 $(OBJ)/t2.out ; \
+		${TEST_SSH_SSHKEYGEN} -yf $(OBJ)/t2.out | diff - ${.CURDIR}/rsa_openssh.pub ; \
+	fi
 
 t3:
-	${TEST_SSH_SSHKEYGEN} -ef ${.CURDIR}/rsa_openssh.pub >$(OBJ)/t3.out
-	${TEST_SSH_SSHKEYGEN} -if $(OBJ)/t3.out | diff - ${.CURDIR}/rsa_openssh.pub
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-rsa" ; then \
+		${TEST_SSH_SSHKEYGEN} -ef ${.CURDIR}/rsa_openssh.pub >$(OBJ)/t3.out ; \
+		${TEST_SSH_SSHKEYGEN} -if $(OBJ)/t3.out | diff - ${.CURDIR}/rsa_openssh.pub ; \
+	fi
 
 t4:
-	${TEST_SSH_SSHKEYGEN} -E md5 -lf ${.CURDIR}/rsa_openssh.pub |\
-		awk '{print $$2}' | diff - ${.CURDIR}/t4.ok
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-rsa" ; then \
+		${TEST_SSH_SSHKEYGEN} -E md5 -lf ${.CURDIR}/rsa_openssh.pub |\
+			awk '{print $$2}' | diff - ${.CURDIR}/t4.ok ; \
+	fi
 
 t5:
-	${TEST_SSH_SSHKEYGEN} -Bf ${.CURDIR}/rsa_openssh.pub |\
-		awk '{print $$2}' | diff - ${.CURDIR}/t5.ok
-
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-rsa" ; then \
+		${TEST_SSH_SSHKEYGEN} -Bf ${.CURDIR}/rsa_openssh.pub |\
+			awk '{print $$2}' | diff - ${.CURDIR}/t5.ok ; \
+	fi
 t6:
-	${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/dsa_ssh2.prv > $(OBJ)/t6.out1
-	${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/dsa_ssh2.pub > $(OBJ)/t6.out2
-	chmod 600 $(OBJ)/t6.out1
-	${TEST_SSH_SSHKEYGEN} -yf $(OBJ)/t6.out1 | diff - $(OBJ)/t6.out2
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/dsa_ssh2.prv > $(OBJ)/t6.out1 ; \
+		${TEST_SSH_SSHKEYGEN} -if ${.CURDIR}/dsa_ssh2.pub > $(OBJ)/t6.out2 ; \
+		chmod 600 $(OBJ)/t6.out1 ; \
+		${TEST_SSH_SSHKEYGEN} -yf $(OBJ)/t6.out1 | diff - $(OBJ)/t6.out2 ; \
+	fi
 
 $(OBJ)/t7.out:
-	${TEST_SSH_SSHKEYGEN} -q -t rsa -N '' -f $@
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -q -t rsa -N '' -f $@ ; \
+	fi
 
 t7: $(OBJ)/t7.out
-	${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t7.out > /dev/null
-	${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t7.out > /dev/null
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t7.out > /dev/null ; \
+		${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t7.out > /dev/null ; \
+	fi
 
 $(OBJ)/t8.out:
-	${TEST_SSH_SSHKEYGEN} -q -t dsa -N '' -f $@
+	set -xe ; if ssh -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -q -t dsa -N '' -f $@ ; \
+	fi
 
 t8: $(OBJ)/t8.out
-	${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t8.out > /dev/null
-	${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t8.out > /dev/null
+	set -xe ; if ssh -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t8.out > /dev/null ; \
+		${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t8.out > /dev/null ; \
+	fi
 
 $(OBJ)/t9.out:
 	! ${TEST_SSH_SSH} -Q key-plain | grep ecdsa >/dev/null || \
 	${TEST_SSH_SSHKEYGEN} -q -t ecdsa -N '' -f $@
 
 t9: $(OBJ)/t9.out
 	! ${TEST_SSH_SSH} -Q key-plain | grep ecdsa >/dev/null || \
 	${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t9.out > /dev/null
 	! ${TEST_SSH_SSH} -Q key-plain | grep ecdsa >/dev/null || \
 	${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t9.out > /dev/null
 
 
 $(OBJ)/t10.out:
 	${TEST_SSH_SSHKEYGEN} -q -t ed25519 -N '' -f $@
 
 t10: $(OBJ)/t10.out
 	${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t10.out > /dev/null
 	${TEST_SSH_SSHKEYGEN} -Bf $(OBJ)/t10.out > /dev/null
 
 t11:
-	${TEST_SSH_SSHKEYGEN} -E sha256 -lf ${.CURDIR}/rsa_openssh.pub |\
-		awk '{print $$2}' | diff - ${.CURDIR}/t11.ok
+	set -xe ; if ${TEST_SSH_SSH} -Q key | grep -q "^ssh-dss" ; then \
+		${TEST_SSH_SSHKEYGEN} -E sha256 -lf ${.CURDIR}/rsa_openssh.pub |\
+			awk '{print $$2}' | diff - ${.CURDIR}/t11.ok ; \
+	fi
 
 $(OBJ)/t12.out:
 	${TEST_SSH_SSHKEYGEN} -q -t ed25519 -N '' -C 'test-comment-1234' -f $@
 
 t12: $(OBJ)/t12.out
 	${TEST_SSH_SSHKEYGEN} -lf $(OBJ)/t12.out.pub | grep test-comment-1234 >/dev/null
 
 t-exec:	${LTESTS:=.sh}
 	@if [ "x$?" = "x" ]; then exit 0; fi; \
 	_started=""; test -z "${LTESTS_FROM}" && _started=1 ;\
 	for TEST in ""$?; do \
 		if [ -z "$$_started" ] ; then \
 			if [ "x$$TEST" = "x${LTESTS_FROM}.sh" ]; then \
 				_started=1; \
 			else \
 				continue; \
 			fi ; \
 		fi ; \
 		skip=no; \
 		for t in ""$${SKIP_LTESTS}; do \
 			if [ "x$${t}.sh" = "x$${TEST}" ]; then skip=yes; fi; \
 		done; \
 		if [ "x$${skip}" = "xno" ]; then \
 			echo "run test $${TEST}" ... 1>&2; \
 			(env SUDO="${SUDO}" TEST_ENV=${TEST_ENV} ${TEST_SHELL} ${.CURDIR}/test-exec.sh ${.OBJDIR} ${.CURDIR}/$${TEST}) || exit $$?; \
 		else \
 			echo skip test $${TEST} 1>&2; \
 		fi; \
 	done
 
 t-exec-interop:	${INTEROP_TESTS:=.sh}
 	@if [ "x$?" = "x" ]; then exit 0; fi; \
 	for TEST in ""$?; do \
 		echo "run test $${TEST}" ... 1>&2; \
 		(env SUDO="${SUDO}" TEST_ENV=${TEST_ENV} ${TEST_SHELL} ${.CURDIR}/test-exec.sh ${.OBJDIR} ${.CURDIR}/$${TEST}) || exit $$?; \
 	done
 
 t-extra:	${EXTRA_TESTS:=.sh}
 	@if [ "x$?" = "x" ]; then exit 0; fi; \
 	for TEST in ""$?; do \
 		echo "run test $${TEST}" ... 1>&2; \
 		(env SUDO="${SUDO}" TEST_ENV=${TEST_ENV} ${TEST_SHELL} ${.CURDIR}/test-exec.sh ${.OBJDIR} ${.CURDIR}/$${TEST}) || exit $$?; \
 	done
 
 # Not run by default
 interop: ${INTEROP_TARGETS}
 
 # Unit tests, built by top-level Makefile
 unit:
 	set -e ; if test -z "${SKIP_UNIT}" ; then \
 		V="" ; \
 		test "x${USE_VALGRIND}" = "x" || \
 		    V=${.CURDIR}/valgrind-unit.sh ; \
 		 $$V ${.OBJDIR}/unittests/sshbuf/test_sshbuf ; \
 		 $$V ${.OBJDIR}/unittests/sshkey/test_sshkey \
 			-d ${.CURDIR}/unittests/sshkey/testdata ; \
 		$$V ${.OBJDIR}/unittests/sshsig/test_sshsig \
 			-d ${.CURDIR}/unittests/sshsig/testdata ; \
 		$$V ${.OBJDIR}/unittests/authopt/test_authopt \
 			-d ${.CURDIR}/unittests/authopt/testdata ; \
 		$$V ${.OBJDIR}/unittests/bitmap/test_bitmap ; \
 		$$V ${.OBJDIR}/unittests/conversion/test_conversion ; \
 		$$V ${.OBJDIR}/unittests/kex/test_kex ; \
 		$$V ${.OBJDIR}/unittests/hostkeys/test_hostkeys \
 			-d ${.CURDIR}/unittests/hostkeys/testdata ; \
 		$$V ${.OBJDIR}/unittests/match/test_match ; \
 		$$V ${.OBJDIR}/unittests/misc/test_misc ; \
 		if test "x${TEST_SSH_UTF8}" = "xyes"  ; then \
 			$$V ${.OBJDIR}/unittests/utf8/test_utf8 ; \
 		fi \
 	fi
diff --git a/regress/channel-timeout.sh b/regress/channel-timeout.sh
index 1c42e832ae2c..97708f2a2c9b 100644
--- a/regress/channel-timeout.sh
+++ b/regress/channel-timeout.sh
@@ -1,91 +1,161 @@
-#	$OpenBSD: channel-timeout.sh,v 1.1 2023/01/06 08:07:39 djm Exp $
+#	$OpenBSD: channel-timeout.sh,v 1.2 2024/01/09 22:19:36 djm Exp $
 #	Placed in the Public Domain.
 
 tid="channel timeout"
 
 # XXX not comprehensive. Still need -R -L agent X11 forwarding + interactive
 
+rm -f $OBJ/finished.* $OBJ/mux.*
+
+MUXPATH=$OBJ/mux.$$
+open_mux() {
+	${SSH} -nNfM -oControlPath=$MUXPATH -F $OBJ/ssh_proxy "$@" somehost ||
+	    fatal "open mux failed"
+	test -e $MUXPATH || fatal "mux socket $MUXPATH not established"
+}
+
+close_mux() {
+	test -e $MUXPATH || fatal "mux socket $MUXPATH missing"
+	${SSH} -qF $OBJ/ssh_proxy -oControlPath=$MUXPATH -O exit somehost ||
+	    fatal "could not terminate mux process"
+	for x in 1 2 3 4 5 6 7 8 9 10 ; do
+		test -e $OBJ/mux && break
+		sleep 1
+	done
+	test -e $MUXPATH && fatal "mux did not clean up"
+}
+mux_client() {
+	${SSH} -F $OBJ/ssh_proxy -oControlPath=$MUXPATH somehost "$@"
+}
+
 rm -f $OBJ/sshd_proxy.orig 
 cp $OBJ/sshd_proxy $OBJ/sshd_proxy.orig
 
 verbose "no timeout"
 ${SSH} -F $OBJ/ssh_proxy somehost "sleep 5 ; exit 23"
 r=$?
 if [ $r -ne 23 ]; then
 	fail "ssh failed"
 fi
 
 verbose "command timeout"
 (cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:command=1") \
 	> $OBJ/sshd_proxy
 ${SSH} -F $OBJ/ssh_proxy somehost "sleep 5 ; exit 23"
 r=$?
 if [ $r -ne 255 ]; then
 	fail "ssh returned unexpected error code $r"
 fi
 
+verbose "command long timeout"
+(cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:command=60") \
+	> $OBJ/sshd_proxy
+${SSH} -F $OBJ/ssh_proxy somehost "exit 23"
+r=$?
+if [ $r -ne 23 ]; then
+	fail "ssh returned unexpected error code $r"
+fi
+
 verbose "command wildcard timeout"
 (cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:*=1") \
 	> $OBJ/sshd_proxy
 ${SSH} -F $OBJ/ssh_proxy somehost "sleep 5 ; exit 23"
 r=$?
 if [ $r -ne 255 ]; then
 	fail "ssh returned unexpected error code $r"
 fi
 
 verbose "command irrelevant timeout"
 (cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:shell=1") \
 	> $OBJ/sshd_proxy
 ${SSH} -F $OBJ/ssh_proxy somehost "sleep 5 ; exit 23"
 r=$?
 if [ $r -ne 23 ]; then
 	fail "ssh failed"
 fi
 
+if config_defined DISABLE_FD_PASSING ; then
+	verbose "skipping multiplexing tests"
+else
+	verbose "multiplexed command timeout"
+	(cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:command=1") \
+		> $OBJ/sshd_proxy
+	open_mux
+	mux_client "sleep 5 ; exit 23"
+	r=$?
+	if [ $r -ne 255 ]; then
+		fail "ssh returned unexpected error code $r"
+	fi
+	close_mux
+
+	verbose "irrelevant multiplexed command timeout"
+	(cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:shell=1") \
+		> $OBJ/sshd_proxy
+	open_mux
+	mux_client "sleep 5 ; exit 23"
+	r=$?
+	if [ $r -ne 23 ]; then
+		fail "ssh returned unexpected error code $r"
+	fi
+	close_mux
+
+	verbose "global command timeout"
+	(cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout global=10") \
+		> $OBJ/sshd_proxy
+	open_mux
+	mux_client "sleep 1 ; echo ok ; sleep 1; echo ok; sleep 60; touch $OBJ/finished.1" >/dev/null &
+	mux_client "sleep 60 ; touch $OBJ/finished.2" >/dev/null &
+	mux_client "sleep 2 ; touch $OBJ/finished.3" >/dev/null &
+	wait
+	test -f $OBJ/finished.1 && fail "first mux process completed"
+	test -f $OBJ/finished.2 && fail "second mux process completed"
+	test -f $OBJ/finished.3 || fail "third mux process did not complete"
+	close_mux
+fi
+
 # Set up a "slow sftp server" that sleeps before executing the real one.
 cat > $OBJ/slow-sftp-server.sh << _EOF
 #!/bin/sh
 
 sleep 5
 $SFTPSERVER
 _EOF
 chmod a+x $OBJ/slow-sftp-server.sh
 
 verbose "sftp no timeout"
 (grep -vi subsystem.*sftp $OBJ/sshd_proxy.orig;
  echo "Subsystem sftp $OBJ/slow-sftp-server.sh" ) > $OBJ/sshd_proxy
 
 rm -f ${COPY}
 $SFTP -qS $SSH -F $OBJ/ssh_proxy somehost:$DATA $COPY
 r=$?
 if [ $r -ne 0 ]; then
 	fail "sftp failed"
 fi
 cmp $DATA $COPY || fail "corrupted copy"
 
 verbose "sftp timeout"
 (grep -vi subsystem.*sftp $OBJ/sshd_proxy.orig;
  echo "ChannelTimeout session:subsystem:sftp=1" ;
  echo "Subsystem sftp $OBJ/slow-sftp-server.sh" ) > $OBJ/sshd_proxy
 
 rm -f ${COPY}
 $SFTP -qS $SSH -F $OBJ/ssh_proxy somehost:$DATA $COPY
 r=$?
 if [ $r -eq 0 ]; then
 	fail "sftp succeeded unexpectedly"
 fi
 test -f $COPY && cmp $DATA $COPY && fail "intact copy"
 
 verbose "sftp irrelevant timeout"
 (grep -vi subsystem.*sftp $OBJ/sshd_proxy.orig;
  echo "ChannelTimeout session:subsystem:command=1" ;
  echo "Subsystem sftp $OBJ/slow-sftp-server.sh" ) > $OBJ/sshd_proxy
 
 rm -f ${COPY}
 $SFTP -qS $SSH -F $OBJ/ssh_proxy somehost:$DATA $COPY
 r=$?
 if [ $r -ne 0 ]; then
 	fail "sftp failed"
 fi
 cmp $DATA $COPY || fail "corrupted copy"
-
diff --git a/regress/dynamic-forward.sh b/regress/dynamic-forward.sh
index 5a4aa6d8e9f7..85901eaa6340 100644
--- a/regress/dynamic-forward.sh
+++ b/regress/dynamic-forward.sh
@@ -1,110 +1,111 @@
-#	$OpenBSD: dynamic-forward.sh,v 1.15 2023/01/06 08:50:33 dtucker Exp $
+#	$OpenBSD: dynamic-forward.sh,v 1.17 2024/03/08 11:34:10 dtucker Exp $
 #	Placed in the Public Domain.
 
 tid="dynamic forwarding"
 
 # This is a reasonable proxy for IPv6 support.
 if ! config_defined HAVE_STRUCT_IN6_ADDR ; then
 	SKIP_IPV6=yes
 fi
 
 FWDPORT=`expr $PORT + 1`
 make_tmpdir
 CTL=${SSH_REGRESS_TMP}/ctl-sock
 cp $OBJ/ssh_config $OBJ/ssh_config.orig
 proxycmd="$OBJ/netcat -x 127.0.0.1:$FWDPORT -X"
 trace "will use ProxyCommand $proxycmd"
 
 start_ssh() {
 	direction="$1"
 	arg="$2"
 	n=0
 	error="1"
+	# Use a multiplexed ssh so we can control its lifecycle.
 	trace "start dynamic -$direction forwarding, fork to background"
 	(cat $OBJ/ssh_config.orig ; echo "$arg") > $OBJ/ssh_config
 	${REAL_SSH} -vvvnNfF $OBJ/ssh_config -E$TEST_SSH_LOGFILE \
 	    -$direction $FWDPORT -oExitOnForwardFailure=yes \
 	    -oControlMaster=yes -oControlPath=$CTL somehost
 	r=$?
 	test $r -eq 0 || fatal "failed to start dynamic forwarding $r"
 	if ! ${REAL_SSH} -qF$OBJ/ssh_config -O check \
 	     -oControlPath=$CTL somehost >/dev/null 2>&1 ; then
 		fatal "forwarding ssh process unresponsive"
 	fi
 }
 
 stop_ssh() {
 	test -S $CTL || return
 	if ! ${REAL_SSH} -qF$OBJ/ssh_config -O exit \
 	     -oControlPath=$CTL >/dev/null somehost >/dev/null ; then
 		fatal "forwarding ssh process did not respond to close"
 	fi
 	n=0
 	while [ "$n" -lt 20 ] ; do
 		test -S $CTL || break
 		sleep 1
 		n=`expr $n + 1`
 	done
 	if test -S $CTL ; then
 		fatal "forwarding ssh process did not exit"
 	fi
 }
 
 check_socks() {
 	direction=$1
 	expect_success=$2
 	for s in 4 5; do
 	    for h in 127.0.0.1 localhost; do
 		trace "testing ssh socks version $s host $h (-$direction)"
-		${REAL_SSH} -q -F $OBJ/ssh_config \
-			-o "ProxyCommand ${proxycmd}${s} $h $PORT 2>/dev/null" \
-			somehost cat ${DATA} > ${COPY}
+		${REAL_SSH} -q -F $OBJ/ssh_config -o \
+		   "ProxyCommand ${TEST_SHELL} -c '${proxycmd}${s} $h $PORT 2>/dev/null'" \
+		   somehost cat ${DATA} > ${COPY}
 		r=$?
 		if [ "x$expect_success" = "xY" ] ; then
 			if [ $r -ne 0 ] ; then
 				fail "ssh failed with exit status $r"
 			fi
 			test -f ${COPY}	 || fail "failed copy ${DATA}"
 			cmp ${DATA} ${COPY} || fail "corrupted copy of ${DATA}"
 		elif [ $r -eq 0 ] ; then
 			fail "ssh unexpectedly succeeded"
 		fi
 	    done
 	done
 }
 
 start_sshd
 trap "stop_ssh" EXIT
 
 for d in D R; do
 	verbose "test -$d forwarding"
 	start_ssh $d
 	check_socks $d Y
 	stop_ssh
 	test "x$d" = "xR" || continue
 	
 	# Test PermitRemoteOpen
 	verbose "PermitRemoteOpen=any"
 	start_ssh $d PermitRemoteOpen=any
 	check_socks $d Y
 	stop_ssh
 
 	verbose "PermitRemoteOpen=none"
 	start_ssh $d PermitRemoteOpen=none
 	check_socks $d N
 	stop_ssh
 
 	verbose "PermitRemoteOpen=explicit"
 	permit="127.0.0.1:$PORT [::1]:$PORT localhost:$PORT"
 	test -z "$SKIP_IPV6" || permit="127.0.0.1:$PORT localhost:$PORT"
 	start_ssh $d PermitRemoteOpen="$permit"
 	check_socks $d Y
 	stop_ssh
 
 	verbose "PermitRemoteOpen=disallowed"
 	permit="127.0.0.1:1 [::1]:1 localhost:1"
 	test -z "$SKIP_IPV6" || permit="127.0.0.1:1 localhost:1"
 	start_ssh $d PermitRemoteOpen="$permit"
 	check_socks $d N
 	stop_ssh
 done
diff --git a/regress/misc/fuzz-harness/Makefile b/regress/misc/fuzz-harness/Makefile
index 0b4238fd39a4..107213029e0c 100644
--- a/regress/misc/fuzz-harness/Makefile
+++ b/regress/misc/fuzz-harness/Makefile
@@ -1,55 +1,55 @@
 # NB. libssh and libopenbsd-compat should be built with the same sanitizer opts.
-CC=clang-11
-CXX=clang++-11
+CC=clang-16
+CXX=clang++-16
 FUZZ_FLAGS=-fsanitize=address,fuzzer -fno-omit-frame-pointer
-FUZZ_LIBS=-lFuzzer
+FUZZ_LIBS=-L/usr/lib/llvm-16/lib -lFuzzer
 
-CXXFLAGS=-O2 -g -Wall -Wextra -Wno-unused-parameter -I ../../.. $(FUZZ_FLAGS)
+CXXFLAGS=-O2 -g -Wall -Wextra -Wno-unused-parameter -Wno-exceptions -I ../../.. $(FUZZ_FLAGS)
 CFLAGS=$(CXXFLAGS)
 LDFLAGS=-L ../../.. -L ../../../openbsd-compat -g $(FUZZ_FLAGS)
 LIBS=-lssh -lopenbsd-compat -lmd -lcrypto -lfido2 -lcbor $(FUZZ_LIBS)
 SK_NULL_OBJS=ssh-sk-null.o
 COMMON_DEPS=../../../libssh.a
 
 TARGETS=pubkey_fuzz sig_fuzz authopt_fuzz authkeys_fuzz sshsig_fuzz \
 	sshsigopt_fuzz privkey_fuzz kex_fuzz agent_fuzz
 
 all: $(TARGETS)
 
 .cc.o:
 	$(CXX) $(CXXFLAGS) -c $< -o $@
 
 pubkey_fuzz: pubkey_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ pubkey_fuzz.o $(SK_NULL_OBJS) $(LDFLAGS) $(LIBS)
 
 sig_fuzz: sig_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ sig_fuzz.o $(SK_NULL_OBJS) $(LDFLAGS) $(LIBS)
 
 authopt_fuzz: authopt_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ authopt_fuzz.o $(SK_NULL_OBJS) ../../../auth-options.o $(LDFLAGS) $(LIBS)
 
 authkeys_fuzz: authkeys_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ authkeys_fuzz.o $(SK_NULL_OBJS) ../../../auth-options.o ../../../auth2-pubkeyfile.o $(LDFLAGS) $(LIBS)
 
 sshsig_fuzz: sshsig_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ sshsig_fuzz.o $(SK_NULL_OBJS) ../../../sshsig.o $(LDFLAGS) $(LIBS)
 
 sshsigopt_fuzz: sshsigopt_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ sshsigopt_fuzz.o $(SK_NULL_OBJS) ../../../sshsig.o $(LDFLAGS) $(LIBS)
 
 privkey_fuzz: privkey_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ privkey_fuzz.o $(SK_NULL_OBJS) $(LDFLAGS) $(LIBS)
 
 kex_fuzz: kex_fuzz.o $(SK_NULL_OBJS) $(COMMON_DEPS)
 	$(CXX) -o $@ kex_fuzz.o $(SK_NULL_OBJS) $(LDFLAGS) $(LIBS) -lz
 
 agent_fuzz: agent_fuzz.o agent_fuzz_helper.o sk-dummy.o ../../../ssh-sk.o $(COMMON_DEPS)
 	$(CXX) -o $@ agent_fuzz.o agent_fuzz_helper.o sk-dummy.o ../../../ssh-sk.o $(LDFLAGS) $(LIBS) -lz
 
 agent_fuzz_helper.o: agent_fuzz_helper.c ../../../ssh-agent.c
 
 sk-dummy.o: ../sk-dummy/sk-dummy.c
 	$(CC) $(CFLAGS) -c -o $@ ../sk-dummy/sk-dummy.c -DSK_DUMMY_INTEGRATE=1 $(LDFLAGS)
 
 clean:
 	-rm -f *.o $(TARGETS)
diff --git a/regress/misc/fuzz-harness/agent_fuzz_helper.c b/regress/misc/fuzz-harness/agent_fuzz_helper.c
index 1d419820cc5d..c3051c72b8db 100644
--- a/regress/misc/fuzz-harness/agent_fuzz_helper.c
+++ b/regress/misc/fuzz-harness/agent_fuzz_helper.c
@@ -1,177 +1,184 @@
 #include "fixed-keys.h"
 #include <assert.h>
 
 #define main(ac, av) xxxmain(ac, av)
 #include "../../../ssh-agent.c"
 
 void test_one(const uint8_t* s, size_t slen);
 
 static int
 devnull_or_die(void)
 {
 	int fd;
 
 	if ((fd = open("/dev/null", O_RDWR)) == -1) {
 		error_f("open /dev/null: %s", strerror(errno));
 		abort();
 	}
 	return fd;
 }
 
 static struct sshkey *
 pubkey_or_die(const char *s)
 {
 	char *tmp, *cp;
 	struct sshkey *pubkey;
 	int r;
 
 	tmp = cp = xstrdup(s);
 	if ((pubkey = sshkey_new(KEY_UNSPEC)) == NULL)
 		abort();
 	if ((r = sshkey_read(pubkey, &cp)) != 0) {
 		error_fr(r, "parse");
 		abort();
 	}
 	free(tmp);
 	return pubkey;
 }
 
 static struct sshkey *
 privkey_or_die(const char *s)
 {
 	int r;
 	struct sshbuf *b;
 	struct sshkey *privkey;
 
 	if ((b = sshbuf_from(s, strlen(s))) == NULL) {
 		error_f("sshbuf_from failed");
 		abort();
 	}
 	if ((r = sshkey_parse_private_fileblob(b, "", &privkey, NULL)) != 0) {
 		error_fr(r, "parse");
 		abort();
 	}
 	sshbuf_free(b);
 	return privkey;
 }
 
 static void
 add_key(const char *privkey, const char *certpath)
 {
 	Identity *id;
 	int r;
 	struct sshkey *cert;
 
 	id = xcalloc(1, sizeof(Identity));
 	TAILQ_INSERT_TAIL(&idtab->idlist, id, next);
 	idtab->nentries++;
 	id->key = privkey_or_die(privkey);
 	id->comment = xstrdup("rhododaktulos Eos");
 	if (sshkey_is_sk(id->key))
 		id->sk_provider = xstrdup("internal");
 
 	/* Now the cert too */
 	id = xcalloc(1, sizeof(Identity));
 	TAILQ_INSERT_TAIL(&idtab->idlist, id, next);
 	idtab->nentries++;
 	id->key = privkey_or_die(privkey);
 	cert = pubkey_or_die(certpath);
 	if ((r = sshkey_to_certified(id->key)) != 0) {
 		error_fr(r, "sshkey_to_certified");
 		abort();
 	}
 	if ((r = sshkey_cert_copy(cert, id->key)) != 0) {
 		error_fr(r, "sshkey_cert_copy");
 		abort();
 	}
 	sshkey_free(cert);
 	id->comment = xstrdup("outis");
 	if (sshkey_is_sk(id->key))
 		id->sk_provider = xstrdup("internal");
 }
 
 static void
 cleanup_idtab(void)
 {
 	Identity *id;
 
 	if (idtab == NULL) return;
 	for (id = TAILQ_FIRST(&idtab->idlist); id;
 	    id = TAILQ_FIRST(&idtab->idlist)) {
 		TAILQ_REMOVE(&idtab->idlist, id, next);
 		free_identity(id);
 	}
 	free(idtab);
 	idtab = NULL;
 }
 
 static void
 reset_idtab(void)
 {
 	cleanup_idtab();
 	idtab_init();
 	// Load keys.
 	add_key(PRIV_RSA, CERT_RSA);
 	add_key(PRIV_DSA, CERT_DSA);
 	add_key(PRIV_ECDSA, CERT_ECDSA);
 	add_key(PRIV_ED25519, CERT_ED25519);
 	add_key(PRIV_ECDSA_SK, CERT_ECDSA_SK);
 	add_key(PRIV_ED25519_SK, CERT_ED25519_SK);
 }
 
 static void
 cleanup_sockettab(void)
 {
 	u_int i;
 	for (i = 0; i < sockets_alloc; i++) {
 		if (sockets[i].type != AUTH_UNUSED)
 			close_socket(sockets + i);
 	}
 	free(sockets);
 	sockets = NULL;
 	sockets_alloc = 0;
 }
 
 static void
 reset_sockettab(int devnull)
 {
 	int fd;
 
 	cleanup_sockettab();
 	if ((fd = dup(devnull)) == -1) {
 		error_f("dup: %s", strerror(errno));
 		abort();
 	}
 	new_socket(AUTH_CONNECTION, fd);
 	assert(sockets[0].type == AUTH_CONNECTION);
 	assert(sockets[0].fd == fd);
 }
 
 #define MAX_MESSAGES 256
 void
 test_one(const uint8_t* s, size_t slen)
 {
 	static int devnull = -1;
 	size_t i, olen, nlen;
 
 	if (devnull == -1) {
 		log_init(__progname, SYSLOG_LEVEL_DEBUG3,
 		    SYSLOG_FACILITY_AUTH, 1);
 		devnull = devnull_or_die();
 		allowed_providers = xstrdup("");
 		setenv("DISPLAY", "", 1); /* ban askpass */
 	}
 
 	reset_idtab();
 	reset_sockettab(devnull);
 	(void)sshbuf_put(sockets[0].input, s, slen);
 	for (i = 0; i < MAX_MESSAGES; i++) {
 		olen = sshbuf_len(sockets[0].input);
 		process_message(0);
 		nlen = sshbuf_len(sockets[0].input);
 		if (nlen == 0 || nlen == olen)
 			break;
 	}
 	cleanup_idtab();
 	cleanup_sockettab();
 }
+
+int
+pkcs11_make_cert(const struct sshkey *priv,
+    const struct sshkey *certpub, struct sshkey **certprivp)
+{
+	return -1; /* XXX */
+}
diff --git a/regress/multiplex.sh b/regress/multiplex.sh
index 8282d0d940f5..b992cd412149 100644
--- a/regress/multiplex.sh
+++ b/regress/multiplex.sh
@@ -1,210 +1,209 @@
 #	$OpenBSD: multiplex.sh,v 1.36 2023/03/01 09:29:32 dtucker Exp $
 #	Placed in the Public Domain.
 
 make_tmpdir
 CTL=${SSH_REGRESS_TMP}/ctl-sock
 
 tid="connection multiplexing"
 
 trace "will use ProxyCommand $proxycmd"
 if config_defined DISABLE_FD_PASSING ; then
-	echo "skipped (not supported on this platform)"
-	exit 0
+	skip "not supported on this platform (FD passing disabled)"
 fi
 
 P=3301  # test port
 
 wait_for_mux_master_ready()
 {
 	for i in 1 2 3 4 5 6 7 8 9; do
 		${SSH} -F $OBJ/ssh_config -S $CTL -Ocheck otherhost \
 		    >/dev/null 2>&1 && return 0
 		sleep $i
 	done
 	fatal "mux master never becomes ready"
 }
 
 maybe_add_scp_path_to_sshd
 start_sshd
 
 start_mux_master()
 {
 	trace "start master, fork to background"
 	${SSH} -Nn2 -MS$CTL -F $OBJ/ssh_config -oSendEnv="_XXX_TEST" somehost \
 	    -E $TEST_REGRESS_LOGFILE 2>&1 &
 	# NB. $SSH_PID will be killed by test-exec.sh:cleanup on fatal errors.
 	SSH_PID=$!
 	wait_for_mux_master_ready
 }
 
 start_mux_master
 
 verbose "test $tid: setenv"
 trace "setenv over multiplexed connection"
 _XXX_TEST=blah ${SSH} -F $OBJ/ssh_config -oSendEnv="_XXX_TEST" -S$CTL otherhost sh << 'EOF'
 	test X"$_XXX_TEST" = X"blah"
 EOF
 if [ $? -ne 0 ]; then
 	fail "environment not found"
 fi
 
 verbose "test $tid: envpass"
 trace "env passing over multiplexed connection"
 ${SSH} -F $OBJ/ssh_config -oSetEnv="_XXX_TEST=foo" -S$CTL otherhost sh << 'EOF'
 	test X"$_XXX_TEST" = X"foo"
 EOF
 if [ $? -ne 0 ]; then
 	fail "environment not found"
 fi
 
 
 verbose "test $tid: transfer"
 rm -f ${COPY}
 trace "ssh transfer over multiplexed connection and check result"
 ${SSH} -F $OBJ/ssh_config -S$CTL otherhost cat ${DATA} > ${COPY}
 test -f ${COPY}			|| fail "ssh -Sctl: failed copy ${DATA}" 
 cmp ${DATA} ${COPY}		|| fail "ssh -Sctl: corrupted copy of ${DATA}"
 
 rm -f ${COPY}
 trace "ssh transfer over multiplexed connection and check result"
 ${SSH} -F $OBJ/ssh_config -S $CTL otherhost cat ${DATA} > ${COPY}
 test -f ${COPY}			|| fail "ssh -S ctl: failed copy ${DATA}" 
 cmp ${DATA} ${COPY}		|| fail "ssh -S ctl: corrupted copy of ${DATA}"
 
 rm -f ${COPY}
 trace "sftp transfer over multiplexed connection and check result"
 echo "get ${DATA} ${COPY}" | \
 	${SFTP} -S ${SSH} -F $OBJ/ssh_config -oControlPath=$CTL otherhost >>$TEST_REGRESS_LOGFILE 2>&1
 test -f ${COPY}			|| fail "sftp: failed copy ${DATA}" 
 cmp ${DATA} ${COPY}		|| fail "sftp: corrupted copy of ${DATA}"
 
 rm -f ${COPY}
 trace "scp transfer over multiplexed connection and check result"
 ${SCP} -S ${SSH} -F $OBJ/ssh_config -oControlPath=$CTL otherhost:${DATA} ${COPY} >>$TEST_REGRESS_LOGFILE 2>&1
 test -f ${COPY}			|| fail "scp: failed copy ${DATA}" 
 cmp ${DATA} ${COPY}		|| fail "scp: corrupted copy of ${DATA}"
 
 rm -f ${COPY}
 verbose "test $tid: forward"
 trace "forward over TCP/IP and check result"
 $NC -N -l 127.0.0.1 $((${PORT} + 1)) < ${DATA} >`ssh_logfile nc` &
 netcat_pid=$!
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -L127.0.0.1:$((${PORT} + 2)):127.0.0.1:$((${PORT} + 1)) otherhost >>$TEST_SSH_LOGFILE 2>&1
 sleep 1  # XXX remove once race fixed
 $NC 127.0.0.1 $((${PORT} + 2)) < /dev/null > ${COPY}
 cmp ${DATA} ${COPY}		|| fail "ssh: corrupted copy of ${DATA}"
 kill $netcat_pid 2>/dev/null
 rm -f ${COPY} $OBJ/unix-[123].fwd
 
 trace "forward over UNIX and check result"
 $NC -N -Ul $OBJ/unix-1.fwd < ${DATA} > /dev/null &
 netcat_pid=$!
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -L$OBJ/unix-2.fwd:$OBJ/unix-1.fwd otherhost >>$TEST_SSH_LOGFILE 2>&1
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -R$OBJ/unix-3.fwd:$OBJ/unix-2.fwd otherhost >>$TEST_SSH_LOGFILE 2>&1
 sleep 1  # XXX remove once race fixed
 $NC -U $OBJ/unix-3.fwd < /dev/null > ${COPY}
 cmp ${DATA} ${COPY}		|| fail "ssh: corrupted copy of ${DATA}"
 kill $netcat_pid 2>/dev/null
 rm -f ${COPY} $OBJ/unix-[123].fwd
 
 for s in 0 1 4 5 44; do
    for mode in "" "-Oproxy"; do
 	trace "exit status $s over multiplexed connection ($mode)"
 	verbose "test $tid: status $s ($mode)"
 	${SSH} -F $OBJ/ssh_config -S $CTL $mode otherhost exit $s
 	r=$?
 	if [ $r -ne $s ]; then
 		fail "exit code mismatch: $r != $s"
 	fi
 
 	# same with early close of stdout/err
 	trace "exit status $s with early close over multiplexed connection ($mode)"
 	${SSH} -F $OBJ/ssh_config -S $CTL -n $mode otherhost \
                 exec sh -c \'"sleep 2; exec > /dev/null 2>&1; sleep 3; exit $s"\'
 	r=$?
 	if [ $r -ne $s ]; then
 		fail "exit code (with sleep) mismatch: $r != $s"
 	fi
    done
 done
 
 verbose "test $tid: cmd check"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ocheck otherhost >>$TEST_REGRESS_LOGFILE 2>&1 \
     || fail "check command failed" 
 
 verbose "test $tid: cmd forward local (TCP)"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -L $P:localhost:$PORT otherhost \
      || fail "request local forward failed"
 sleep 1  # XXX remove once race fixed
 ${SSH} -F $OBJ/ssh_config -p$P otherhost true \
      || fail "connect to local forward port failed"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ocancel -L $P:localhost:$PORT otherhost \
      || fail "cancel local forward failed"
 ${SSH} -F $OBJ/ssh_config -p$P otherhost true \
      && fail "local forward port still listening"
 
 verbose "test $tid: cmd forward remote (TCP)"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -R $P:localhost:$PORT otherhost \
      || fail "request remote forward failed"
 sleep 1  # XXX remove once race fixed
 ${SSH} -F $OBJ/ssh_config -p$P otherhost true \
      || fail "connect to remote forwarded port failed"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ocancel -R $P:localhost:$PORT otherhost \
      || fail "cancel remote forward failed"
 ${SSH} -F $OBJ/ssh_config -p$P otherhost true \
      && fail "remote forward port still listening"
 
 verbose "test $tid: cmd forward local (UNIX)"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -L $OBJ/unix-1.fwd:localhost:$PORT otherhost \
      || fail "request local forward failed"
 sleep 1  # XXX remove once race fixed
 echo "" | $NC -U $OBJ/unix-1.fwd | \
     grep "Invalid SSH identification string" >/dev/null 2>&1 \
      || fail "connect to local forward path failed"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ocancel -L $OBJ/unix-1.fwd:localhost:$PORT otherhost \
      || fail "cancel local forward failed"
 N=$(echo "xyzzy" | $NC -U $OBJ/unix-1.fwd 2>&1 | grep "xyzzy" | wc -l)
 test ${N} -eq 0 || fail "local forward path still listening"
 rm -f $OBJ/unix-1.fwd
 
 verbose "test $tid: cmd forward remote (UNIX)"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oforward -R $OBJ/unix-1.fwd:localhost:$PORT otherhost \
      || fail "request remote forward failed"
 sleep 1  # XXX remove once race fixed
 echo "" | $NC -U $OBJ/unix-1.fwd | \
     grep "Invalid SSH identification string" >/dev/null 2>&1 \
      || fail "connect to remote forwarded path failed"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ocancel -R $OBJ/unix-1.fwd:localhost:$PORT otherhost \
      || fail "cancel remote forward failed"
 N=$(echo "xyzzy" | $NC -U $OBJ/unix-1.fwd 2>&1 | grep "xyzzy" | wc -l)
 test ${N} -eq 0 || fail "remote forward path still listening"
 rm -f $OBJ/unix-1.fwd
 
 verbose "test $tid: cmd exit"
 ${SSH} -F $OBJ/ssh_config -S $CTL -Oexit otherhost >>$TEST_REGRESS_LOGFILE 2>&1 \
     || fail "send exit command failed" 
 
 # Wait for master to exit
 wait $SSH_PID
 kill -0 $SSH_PID >/dev/null 2>&1 && fail "exit command failed"
 
 # Restart master and test -O stop command with master using -N
 verbose "test $tid: cmd stop"
 trace "restart master, fork to background"
 start_mux_master
 
 # start a long-running command then immediately request a stop
 ${SSH} -F $OBJ/ssh_config -S $CTL otherhost "sleep 10; exit 0" \
      >>$TEST_REGRESS_LOGFILE 2>&1 &
 SLEEP_PID=$!
 ${SSH} -F $OBJ/ssh_config -S $CTL -Ostop otherhost >>$TEST_REGRESS_LOGFILE 2>&1 \
     || fail "send stop command failed"
 
 # wait until both long-running command and master have exited.
 wait $SLEEP_PID
 [ $! != 0 ] || fail "waiting for concurrent command"
 wait $SSH_PID
 [ $! != 0 ] || fail "waiting for master stop"
 kill -0 $SSH_PID >/dev/null 2>&1 && fatal "stop command failed"
 SSH_PID="" # Already gone, so don't kill in cleanup
 
diff --git a/regress/putty-ciphers.sh b/regress/putty-ciphers.sh
index 5b8e25a27199..30f6461cc318 100644
--- a/regress/putty-ciphers.sh
+++ b/regress/putty-ciphers.sh
@@ -1,32 +1,55 @@
-#	$OpenBSD: putty-ciphers.sh,v 1.11 2021/09/01 03:16:06 dtucker Exp $
+#	$OpenBSD: putty-ciphers.sh,v 1.13 2024/02/09 08:56:59 dtucker Exp $
 #	Placed in the Public Domain.
 
 tid="putty ciphers"
 
-if test "x$REGRESS_INTEROP_PUTTY" != "xyes" ; then
-	skip "putty interop tests not enabled"
-fi
+puttysetup
 
-# Re-enable ssh-rsa on older PuTTY versions.
-oldver="`${PLINK} --version | awk '/plink: Release/{if ($3<0.76)print "yes"}'`"
-if [ "x$oldver" = "xyes" ]; then
-	echo "HostKeyAlgorithms +ssh-rsa" >> ${OBJ}/sshd_proxy
-	echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> ${OBJ}/sshd_proxy
-fi
+cp ${OBJ}/sshd_proxy ${OBJ}/sshd_proxy_bak
 
-for c in aes 3des aes128-ctr aes192-ctr aes256-ctr chacha20 ; do
-	verbose "$tid: cipher $c"
+# Since there doesn't seem to be a way to set MACs on the PuTTY client side,
+# we force each in turn on the server side, omitting the ones PuTTY doesn't
+# support.  Grepping the binary is pretty janky, but AFAIK there's no way to
+# query for supported algos.
+macs=""
+for m in `${SSH} -Q MACs`; do
+	if strings "${PLINK}" | grep -E "^${m}$" >/dev/null; then
+		macs="${macs} ${m}"
+	else
+		trace "omitting unsupported MAC ${m}"
+	fi
+done
+
+ciphers=""
+for c in `${SSH} -Q Ciphers`; do
+	if strings "${PLINK}" | grep -E "^${c}$" >/dev/null; then
+		ciphers="${ciphers} ${c}"
+	else
+		trace "omitting unsupported cipher ${c}"
+	fi
+done
+
+for c in default $ciphers; do
+    for m in default ${macs}; do
+	verbose "$tid: cipher $c mac $m"
 	cp ${OBJ}/.putty/sessions/localhost_proxy \
 	    ${OBJ}/.putty/sessions/cipher_$c
-	echo "Cipher=$c" >> ${OBJ}/.putty/sessions/cipher_$c
+	if [ "${c}" != "default" ]; then
+		echo "Cipher=$c" >> ${OBJ}/.putty/sessions/cipher_$c
+	fi
+
+	cp ${OBJ}/sshd_proxy_bak ${OBJ}/sshd_proxy
+	if [ "${m}" != "default" ]; then
+		echo "MACs $m" >> ${OBJ}/sshd_proxy
+	fi
 
 	rm -f ${COPY}
 	env HOME=$PWD ${PLINK} -load cipher_$c -batch -i ${OBJ}/putty.rsa2 \
 	    cat ${DATA} > ${COPY}
 	if [ $? -ne 0 ]; then
 		fail "ssh cat $DATA failed"
 	fi
 	cmp ${DATA} ${COPY}		|| fail "corrupted copy"
+    done
 done
 rm -f ${COPY}
-
diff --git a/regress/putty-kex.sh b/regress/putty-kex.sh
index c75802a06103..22f8bd7060f6 100644
--- a/regress/putty-kex.sh
+++ b/regress/putty-kex.sh
@@ -1,28 +1,36 @@
-#	$OpenBSD: putty-kex.sh,v 1.9 2021/09/01 03:16:06 dtucker Exp $
+#	$OpenBSD: putty-kex.sh,v 1.11 2024/02/09 08:56:59 dtucker Exp $
 #	Placed in the Public Domain.
 
 tid="putty KEX"
 
-if test "x$REGRESS_INTEROP_PUTTY" != "xyes" ; then
-	skip "putty interop tests not enabled"
-fi
+puttysetup
 
-# Re-enable ssh-rsa on older PuTTY versions.
-oldver="`${PLINK} --version | awk '/plink: Release/{if ($3<0.76)print "yes"}'`"
-if [ "x$oldver" = "xyes" ]; then
-	echo "HostKeyAlgorithms +ssh-rsa" >> ${OBJ}/sshd_proxy
-	echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> ${OBJ}/sshd_proxy
-fi
+cp ${OBJ}/sshd_proxy ${OBJ}/sshd_proxy_bak
 
-for k in dh-gex-sha1 dh-group1-sha1 dh-group14-sha1 ecdh ; do
+# Enable group1, which PuTTY now disables by default
+echo "KEX=dh-group1-sha1" >>${OBJ}/.putty/sessions/localhost_proxy
+
+# Grepping algos out of the binary is pretty janky, but AFAIK there's no way
+# to query supported algos.
+kex=""
+for k in `$SSH -Q kex`; do
+	if strings "${PLINK}" | grep -E "^${k}$" >/dev/null; then
+		kex="${kex} ${k}"
+	else
+		trace "omitting unsupported KEX ${k}"
+	fi
+done
+
+for k in ${kex}; do
 	verbose "$tid: kex $k"
-	cp ${OBJ}/.putty/sessions/localhost_proxy \
-	    ${OBJ}/.putty/sessions/kex_$k
-	echo "KEX=$k" >> ${OBJ}/.putty/sessions/kex_$k
+	cp ${OBJ}/sshd_proxy_bak ${OBJ}/sshd_proxy
+	echo "KexAlgorithms ${k}" >>${OBJ}/sshd_proxy
 
-	env HOME=$PWD ${PLINK} -load kex_$k -batch -i ${OBJ}/putty.rsa2 true
+	env HOME=$PWD ${PLINK} -v -load localhost_proxy -batch -i ${OBJ}/putty.rsa2 true \
+	    2>${OBJ}/log/putty-kex-$k.log
 	if [ $? -ne 0 ]; then
 		fail "KEX $k failed"
 	fi
+	kexmsg=`grep -E '^Doing.* key exchange' ${OBJ}/log/putty-kex-$k.log`
+	trace putty: ${kexmsg}
 done
-
diff --git a/regress/putty-transfer.sh b/regress/putty-transfer.sh
index a6864f9515a7..1920f49ac8d3 100644
--- a/regress/putty-transfer.sh
+++ b/regress/putty-transfer.sh
@@ -1,50 +1,41 @@
-#	$OpenBSD: putty-transfer.sh,v 1.11 2021/09/01 03:16:06 dtucker Exp $
+#	$OpenBSD: putty-transfer.sh,v 1.12 2024/02/09 08:47:42 dtucker Exp $
 #	Placed in the Public Domain.
 
 tid="putty transfer data"
 
-if test "x$REGRESS_INTEROP_PUTTY" != "xyes" ; then
-	skip "putty interop tests not enabled"
-fi
-
-# Re-enable ssh-rsa on older PuTTY versions.
-oldver="`${PLINK} --version | awk '/plink: Release/{if ($3<0.76)print "yes"}'`"
-if [ "x$oldver" = "xyes" ]; then
-	echo "HostKeyAlgorithms +ssh-rsa" >> ${OBJ}/sshd_proxy
-	echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> ${OBJ}/sshd_proxy
-fi
+puttysetup
 
 if [ "`${SSH} -Q compression`" = "none" ]; then
 	comp="0"
 else
 	comp="0 1"
 fi
 
 for c in $comp; do 
 	verbose "$tid: compression $c"
 	rm -f ${COPY}
 	cp ${OBJ}/.putty/sessions/localhost_proxy \
 	    ${OBJ}/.putty/sessions/compression_$c
 	echo "Compression=$c" >> ${OBJ}/.putty/sessions/kex_$k
 	env HOME=$PWD ${PLINK} -load compression_$c -batch \
 	    -i ${OBJ}/putty.rsa2 cat ${DATA} > ${COPY}
 	if [ $? -ne 0 ]; then
 		fail "ssh cat $DATA failed"
 	fi
 	cmp ${DATA} ${COPY}		|| fail "corrupted copy"
 
 	for s in 10 100 1k 32k 64k 128k 256k; do
 		trace "compression $c dd-size ${s}"
 		rm -f ${COPY}
 		dd if=$DATA obs=${s} 2> /dev/null | \
 			env HOME=$PWD ${PLINK} -load compression_$c \
 			    -batch -i ${OBJ}/putty.rsa2 \
 			    "cat > ${COPY}"
 		if [ $? -ne 0 ]; then
 			fail "ssh cat $DATA failed"
 		fi
 		cmp $DATA ${COPY}	|| fail "corrupted copy"
 	done
 done
 rm -f ${COPY}
 
diff --git a/regress/test-exec.sh b/regress/test-exec.sh
index 089ef73c4ebb..ad627941f4d2 100644
--- a/regress/test-exec.sh
+++ b/regress/test-exec.sh
@@ -1,1003 +1,1025 @@
-#	$OpenBSD: test-exec.sh,v 1.105 2023/10/31 04:15:40 dtucker Exp $
+#	$OpenBSD: test-exec.sh,v 1.108 2024/03/08 11:34:10 dtucker Exp $
 #	Placed in the Public Domain.
 
 #SUDO=sudo
 
 if [ ! -z "$TEST_SSH_ELAPSED_TIMES" ]; then
 	STARTTIME=`date '+%s'`
 fi
 
 if [ ! -z "$TEST_SSH_PORT" ]; then
 	PORT="$TEST_SSH_PORT"
 else
 	PORT=4242
 fi
 
 OBJ=$1
 if [ "x$OBJ" = "x" ]; then
 	echo '$OBJ not defined'
 	exit 2
 fi
 if [ ! -d $OBJ ]; then
 	echo "not a directory: $OBJ"
 	exit 2
 fi
 SCRIPT=$2
 if [ "x$SCRIPT" = "x" ]; then
 	echo '$SCRIPT not defined'
 	exit 2
 fi
 if [ ! -f $SCRIPT ]; then
 	echo "not a file: $SCRIPT"
 	exit 2
 fi
 if $TEST_SHELL -n $SCRIPT; then
 	true
 else
 	echo "syntax error in $SCRIPT"
 	exit 2
 fi
 unset SSH_AUTH_SOCK
 
 # Portable-specific settings.
 
 if [ -x /usr/ucb/whoami ]; then
 	USER=`/usr/ucb/whoami`
 elif whoami >/dev/null 2>&1; then
 	USER=`whoami`
 elif logname >/dev/null 2>&1; then
 	USER=`logname`
 else
 	USER=`id -un`
 fi
 if test -z "$LOGNAME"; then
 	LOGNAME="${USER}"
 	export LOGNAME
 fi
 
 # Unbreak GNU head(1)
 _POSIX2_VERSION=199209
 export _POSIX2_VERSION
 
 case `uname -s 2>/dev/null` in
 OSF1*)
 	BIN_SH=xpg4
 	export BIN_SH
 	;;
 CYGWIN*)
 	os=cygwin
 	;;
 esac
 
 # If configure tells us to use a different egrep, create a wrapper function
 # to call it.  This means we don't need to change all the tests that depend
 # on a good implementation.
 if test "x${EGREP}" != "x"; then
 	egrep ()
 {
 	 ${EGREP} "$@"
 }
 fi
 
 SRC=`dirname ${SCRIPT}`
 
 # defaults
 SSH=ssh
 SSHD=sshd
 SSHAGENT=ssh-agent
 SSHADD=ssh-add
 SSHKEYGEN=ssh-keygen
 SSHKEYSCAN=ssh-keyscan
 SFTP=sftp
 SFTPSERVER=/usr/libexec/openssh/sftp-server
 SCP=scp
 
 # Set by make_tmpdir() on demand (below).
 SSH_REGRESS_TMP=
 
 # Interop testing
 PLINK=/usr/local/bin/plink
 PUTTYGEN=/usr/local/bin/puttygen
 CONCH=/usr/local/bin/conch
 DROPBEAR=/usr/local/bin/dropbear
 DBCLIENT=/usr/local/bin/dbclient
 DROPBEARKEY=/usr/local/bin/dropbearkey
 DROPBEARCONVERT=/usr/local/bin/dropbearconvert
 
+# So we can override this in Portable.
+TEST_SHELL="${TEST_SHELL:-/bin/sh}"
+
 # Tools used by multiple tests
 NC=$OBJ/netcat
 # Always use the one configure tells us to, even if that's empty.
 #OPENSSL_BIN="${OPENSSL_BIN:-openssl}"
 
 if [ "x$TEST_SSH_SSH" != "x" ]; then
 	SSH="${TEST_SSH_SSH}"
 fi
 if [ "x$TEST_SSH_SSHD" != "x" ]; then
 	SSHD="${TEST_SSH_SSHD}"
 fi
 if [ "x$TEST_SSH_SSHAGENT" != "x" ]; then
 	SSHAGENT="${TEST_SSH_SSHAGENT}"
 fi
 if [ "x$TEST_SSH_SSHADD" != "x" ]; then
 	SSHADD="${TEST_SSH_SSHADD}"
 fi
 if [ "x$TEST_SSH_SSHKEYGEN" != "x" ]; then
 	SSHKEYGEN="${TEST_SSH_SSHKEYGEN}"
 fi
 if [ "x$TEST_SSH_SSHKEYSCAN" != "x" ]; then
 	SSHKEYSCAN="${TEST_SSH_SSHKEYSCAN}"
 fi
 if [ "x$TEST_SSH_SFTP" != "x" ]; then
 	SFTP="${TEST_SSH_SFTP}"
 fi
 if [ "x$TEST_SSH_SFTPSERVER" != "x" ]; then
 	SFTPSERVER="${TEST_SSH_SFTPSERVER}"
 fi
 if [ "x$TEST_SSH_SCP" != "x" ]; then
 	SCP="${TEST_SSH_SCP}"
 fi
 if [ "x$TEST_SSH_PLINK" != "x" ]; then
 	PLINK="${TEST_SSH_PLINK}"
 fi
 if [ "x$TEST_SSH_PUTTYGEN" != "x" ]; then
 	PUTTYGEN="${TEST_SSH_PUTTYGEN}"
 fi
 if [ "x$TEST_SSH_CONCH" != "x" ]; then
 	CONCH="${TEST_SSH_CONCH}"
 fi
 if [ "x$TEST_SSH_DROPBEAR" != "x" ]; then
 	DROPBEAR="${TEST_SSH_DROPBEAR}"
 fi
 if [ "x$TEST_SSH_DBCLIENT" != "x" ]; then
 	DBCLIENT="${TEST_SSH_DBCLIENT}"
 fi
 if [ "x$TEST_SSH_DROPBEARKEY" != "x" ]; then
 	DROPBEARKEY="${TEST_SSH_DROPBEARKEY}"
 fi
 if [ "x$TEST_SSH_DROPBEARCONVERT" != "x" ]; then
 	DROPBEARCONVERT="${TEST_SSH_DROPBEARCONVERT}"
 fi
 if [ "x$TEST_SSH_PKCS11_HELPER" != "x" ]; then
 	SSH_PKCS11_HELPER="${TEST_SSH_PKCS11_HELPER}"
 fi
 if [ "x$TEST_SSH_SK_HELPER" != "x" ]; then
 	SSH_SK_HELPER="${TEST_SSH_SK_HELPER}"
 fi
 if [ "x$TEST_SSH_OPENSSL" != "x" ]; then
 	OPENSSL_BIN="${TEST_SSH_OPENSSL}"
 fi
 
 # Path to sshd must be absolute for rexec
 case "$SSHD" in
 /*) ;;
 *) SSHD=`which $SSHD` ;;
 esac
 
 case "$SSHAGENT" in
 /*) ;;
 *) SSHAGENT=`which $SSHAGENT` ;;
 esac
 
 # Record the actual binaries used.
 SSH_BIN=${SSH}
 SSHD_BIN=${SSHD}
 SSHAGENT_BIN=${SSHAGENT}
 SSHADD_BIN=${SSHADD}
 SSHKEYGEN_BIN=${SSHKEYGEN}
 SSHKEYSCAN_BIN=${SSHKEYSCAN}
 SFTP_BIN=${SFTP}
 SFTPSERVER_BIN=${SFTPSERVER}
 SCP_BIN=${SCP}
 
 if [ "x$USE_VALGRIND" != "x" ]; then
 	rm -rf $OBJ/valgrind-out $OBJ/valgrind-vgdb
 	mkdir -p $OBJ/valgrind-out $OBJ/valgrind-vgdb
 	# When using sudo ensure low-priv tests can write pipes and logs.
 	if [ "x$SUDO" != "x" ]; then
 		chmod 777 $OBJ/valgrind-out $OBJ/valgrind-vgdb
 	fi
 	VG_TEST=`basename $SCRIPT .sh`
 
 	# Some tests are difficult to fix.
 	case "$VG_TEST" in
 	reexec)
 		VG_SKIP=1 ;;
 	sftp-chroot)
 		if [ "x${SUDO}" != "x" ]; then
 			VG_SKIP=1
 		fi ;;
 	esac
 
 	if [ x"$VG_SKIP" = "x" ]; then
 		VG_LEAK="--leak-check=no"
 		if [ x"$VALGRIND_CHECK_LEAKS" != "x" ]; then
 			VG_LEAK="--leak-check=full"
 		fi
 		VG_IGNORE="/bin/*,/sbin/*,/usr/*,/var/*"
 		VG_LOG="$OBJ/valgrind-out/${VG_TEST}."
 		VG_OPTS="--track-origins=yes $VG_LEAK"
 		VG_OPTS="$VG_OPTS --trace-children=yes"
 		VG_OPTS="$VG_OPTS --trace-children-skip=${VG_IGNORE}"
 		VG_OPTS="$VG_OPTS --vgdb-prefix=$OBJ/valgrind-vgdb/"
 		VG_PATH="valgrind"
 		if [ "x$VALGRIND_PATH" != "x" ]; then
 			VG_PATH="$VALGRIND_PATH"
 		fi
 		VG="$VG_PATH $VG_OPTS"
 		SSH="$VG --log-file=${VG_LOG}ssh.%p $SSH"
 		SSHD="$VG --log-file=${VG_LOG}sshd.%p $SSHD"
 		SSHAGENT="$VG --log-file=${VG_LOG}ssh-agent.%p $SSHAGENT"
 		SSHADD="$VG --log-file=${VG_LOG}ssh-add.%p $SSHADD"
 		SSHKEYGEN="$VG --log-file=${VG_LOG}ssh-keygen.%p $SSHKEYGEN"
 		SSHKEYSCAN="$VG --log-file=${VG_LOG}ssh-keyscan.%p $SSHKEYSCAN"
 		SFTP="$VG --log-file=${VG_LOG}sftp.%p ${SFTP}"
 		SCP="$VG --log-file=${VG_LOG}scp.%p $SCP"
 		cat > $OBJ/valgrind-sftp-server.sh << EOF
 #!/bin/sh
 exec $VG --log-file=${VG_LOG}sftp-server.%p $SFTPSERVER "\$@"
 EOF
 		chmod a+rx $OBJ/valgrind-sftp-server.sh
 		SFTPSERVER="$OBJ/valgrind-sftp-server.sh"
 	fi
 fi
 
 # Logfiles.
 # SSH_LOGFILE should be the debug output of ssh(1) only
 # SSHD_LOGFILE should be the debug output of sshd(8) only
 # REGRESS_LOGFILE is the log of progress of the regress test itself.
 # TEST_SSH_LOGDIR will contain datestamped logs of all binaries run in
 # chronological order.
 if [ "x$TEST_SSH_LOGDIR" = "x" ]; then
 	TEST_SSH_LOGDIR=$OBJ/log
 	mkdir -p $TEST_SSH_LOGDIR
 fi
 if [ "x$TEST_SSH_LOGFILE" = "x" ]; then
 	TEST_SSH_LOGFILE=$OBJ/ssh.log
 fi
 if [ "x$TEST_SSHD_LOGFILE" = "x" ]; then
 	TEST_SSHD_LOGFILE=$OBJ/sshd.log
 fi
 if [ "x$TEST_REGRESS_LOGFILE" = "x" ]; then
 	TEST_REGRESS_LOGFILE=$OBJ/regress.log
 fi
 
 # If set, keep track of successful tests and skip them them if we've
 # previously completed that test.
 if [ "x$TEST_REGRESS_CACHE_DIR" != "x" ]; then
 	if [ ! -d "$TEST_REGRESS_CACHE_DIR" ]; then
 		mkdir -p "$TEST_REGRESS_CACHE_DIR"
 	fi
 	TEST="`basename $SCRIPT .sh`"
 	CACHE="${TEST_REGRESS_CACHE_DIR}/${TEST}.cache"
 	for i in ${SSH} ${SSHD} ${SSHAGENT} ${SSHADD} ${SSHKEYGEN} ${SCP} \
 	    ${SFTP} ${SFTPSERVER} ${SSHKEYSCAN}; do
 		case $i in
 		/*)	bin="$i" ;;
 		*)	bin="`which $i`" ;;
 		esac
 		if [ "$bin" -nt "$CACHE" ]; then
 			rm -f "$CACHE"
 		fi
 	done
 	if [ -f "$CACHE" ]; then
 		echo ok cached $CACHE
 		exit 0
 	fi
 fi
 
 # truncate logfiles
 >$TEST_REGRESS_LOGFILE
 
 # Create ssh and sshd wrappers with logging.  These create a datestamped
 # unique file for every invocation so that we can retain all logs from a
 # given test no matter how many times it's invoked.  It also leaves a
 # symlink with the original name for tests (and people) who look for that.
 
 # For ssh, e can't just specify "SSH=ssh -E..." because sftp and scp don't
 # handle spaces in arguments.  scp and sftp like to use -q so we remove those
 # to preserve our debug logging.  In the rare instance where -q is desirable
 # -qq is equivalent and is not removed.
 SSHLOGWRAP=$OBJ/ssh-log-wrapper.sh
 cat >$SSHLOGWRAP <<EOD
 #!/bin/sh
 timestamp="\`$OBJ/timestamp\`"
 logfile="${TEST_SSH_LOGDIR}/\${timestamp}.ssh.\$\$.log"
 echo "Executing: ${SSH} \$@" log \${logfile} >>$TEST_REGRESS_LOGFILE
 echo "Executing: ${SSH} \$@" >>\${logfile}
 for i in "\$@";do shift;case "\$i" in -q):;; *) set -- "\$@" "\$i";;esac;done
 rm -f $TEST_SSH_LOGFILE
 ln -f -s \${logfile} $TEST_SSH_LOGFILE
 exec ${SSH} -E\${logfile} "\$@"
 EOD
 
 chmod a+rx $OBJ/ssh-log-wrapper.sh
 REAL_SSH="$SSH"
 REAL_SSHD="$SSHD"
 SSH="$SSHLOGWRAP"
 
 SSHDLOGWRAP=$OBJ/sshd-log-wrapper.sh
 cat >$SSHDLOGWRAP <<EOD
 #!/bin/sh
 timestamp="\`$OBJ/timestamp\`"
 logfile="${TEST_SSH_LOGDIR}/\${timestamp}.sshd.\$\$.log"
 rm -f $TEST_SSHD_LOGFILE
 touch \$logfile
 test -z "$SUDO" || chown $USER \$logfile
 ln -f -s \${logfile} $TEST_SSHD_LOGFILE
 echo "Executing: ${SSHD} \$@" log \${logfile} >>$TEST_REGRESS_LOGFILE
 echo "Executing: ${SSHD} \$@" >>\${logfile}
 exec ${SSHD} -E\${logfile} "\$@"
 EOD
 chmod a+rx $OBJ/sshd-log-wrapper.sh
 
 ssh_logfile ()
 {
 	tool="$1"
 	timestamp="`$OBJ/timestamp`"
 	logfile="${TEST_SSH_LOGDIR}/${timestamp}.$tool.$$.log"
 	echo "Logging $tool to log \${logfile}" >>$TEST_REGRESS_LOGFILE
 	echo $logfile
 }
 
 # Some test data.  We make a copy because some tests will overwrite it.
 # The tests may assume that $DATA exists and is writable and $COPY does
 # not exist.  Tests requiring larger data files can call increase_datafile_size
 # [kbytes] to ensure the file is at least that large.
 DATANAME=data
 DATA=$OBJ/${DATANAME}
 cat ${SSHAGENT_BIN} >${DATA}
 chmod u+w ${DATA}
 COPY=$OBJ/copy
 rm -f ${COPY}
 
 increase_datafile_size()
 {
 	while [ `du -k ${DATA} | cut -f1` -lt $1 ]; do
 		cat ${SSHAGENT_BIN} >>${DATA}
 	done
 }
 
 # these should be used in tests
 export SSH SSHD SSHAGENT SSHADD SSHKEYGEN SSHKEYSCAN SFTP SFTPSERVER SCP
 export SSH_PKCS11_HELPER SSH_SK_HELPER
 #echo $SSH $SSHD $SSHAGENT $SSHADD $SSHKEYGEN $SSHKEYSCAN $SFTP $SFTPSERVER $SCP
 
 # Portable specific functions
 which()
 {
 	saved_IFS="$IFS"
 	IFS=":"
 	for i in $PATH
 	do
 		if [ -x $i/$1 ]; then
 			IFS="$saved_IFS"
 			echo "$i/$1"
 			return 0
 		fi
 	done
 	IFS="$saved_IFS"
 	echo "$i/$1"
 	return 1
 }
 
 have_prog()
 {
 	which "$1" >/dev/null 2>&1
 	return $?
 }
 
 jot() {
 	awk "BEGIN { for (i = $2; i < $2 + $1; i++) { printf \"%d\n\", i } exit }"
 }
 if [ ! -x "`which rev`" ]; then
 rev()
 {
 	awk '{for (i=length; i>0; i--) printf "%s", substr($0, i, 1); print ""}'
 }
 fi
 
 # Check whether preprocessor symbols are defined in config.h.
 config_defined ()
 {
 	str=$1
 	while test "x$2" != "x" ; do
 		str="$str|$2"
 		shift
 	done
 	egrep "^#define.*($str)" ${BUILDDIR}/config.h >/dev/null 2>&1
 }
 
 md5 () {
 	if have_prog md5sum; then
 		md5sum
 	elif have_prog openssl; then
 		openssl md5
 	elif have_prog cksum; then
 		cksum
 	elif have_prog sum; then
 		sum
 	elif [ -x ${OPENSSL_BIN} ]; then
 		${OPENSSL_BIN} md5
 	else
 		wc -c
 	fi
 }
 
 # Some platforms don't have hostname at all, but on others uname -n doesn't
 # provide the fully qualified name we need, so in the former case we create
 # our own hostname function.
 if ! have_prog hostname; then
 	hostname() {
 		uname -n
 	}
 fi
 
 make_tmpdir ()
 {
 	SSH_REGRESS_TMP="$($OBJ/mkdtemp openssh-XXXXXXXX)" || \
 	    fatal "failed to create temporary directory"
 }
 # End of portable specific functions
 
 stop_sshd ()
 {
 	if [ -f $PIDFILE ]; then
 		pid=`$SUDO cat $PIDFILE`
 		if [ "X$pid" = "X" ]; then
 			echo no sshd running
 		else
 			if [ $pid -lt 2 ]; then
 				echo bad pid for sshd: $pid
 			else
 				$SUDO kill $pid
 				trace "wait for sshd to exit"
 				i=0;
 				while [ -f $PIDFILE -a $i -lt 5 ]; do
 					i=`expr $i + 1`
 					sleep $i
 				done
 				if test -f $PIDFILE; then
 					if $SUDO kill -0 $pid; then
 						echo "sshd didn't exit " \
 						    "port $PORT pid $pid"
 					else
 						echo "sshd died without cleanup"
 					fi
 					exit 1
 				fi
 			fi
 		fi
 	fi
 }
 
 # helper
 cleanup ()
 {
 	if [ "x$SSH_PID" != "x" ]; then
 		if [ $SSH_PID -lt 2 ]; then
 			echo bad pid for ssh: $SSH_PID
 		else
 			kill $SSH_PID
 		fi
 	fi
 	if [ "x$SSH_REGRESS_TMP" != "x" ]; then
 		rm -rf "$SSH_REGRESS_TMP"
 	fi
 	stop_sshd
 	if [ ! -z "$TEST_SSH_ELAPSED_TIMES" ]; then
 		now=`date '+%s'`
 		elapsed=$(($now - $STARTTIME))
 		echo elapsed $elapsed `basename $SCRIPT .sh`
 	fi
 }
 
 start_debug_log ()
 {
 	echo "trace: $@" >>$TEST_REGRESS_LOGFILE
 	if [ -d "$TEST_SSH_LOGDIR" ]; then
 		rm -f $TEST_SSH_LOGDIR/*
 	fi
 }
 
 save_debug_log ()
 {
 	testname=`echo $tid | tr ' ' _`
 	tarname="$OBJ/failed-$testname-logs.tar"
 
 	for logfile in $TEST_SSH_LOGDIR $TEST_REGRESS_LOGFILE \
 	    $TEST_SSH_LOGFILE $TEST_SSHD_LOGFILE; do
 		if [ ! -z "$SUDO" ] && [ -f "$logfile" ]; then
 			$SUDO chown -R $USER $logfile
 		fi
 	done
 	echo $@ >>$TEST_REGRESS_LOGFILE
 	echo $@ >>$TEST_SSH_LOGFILE
 	echo $@ >>$TEST_SSHD_LOGFILE
 	echo "Saving debug logs to $tarname" >>$TEST_REGRESS_LOGFILE
 	(cat $TEST_REGRESS_LOGFILE; echo) >>$OBJ/failed-regress.log
 	(cat $TEST_SSH_LOGFILE; echo) >>$OBJ/failed-ssh.log
 	(cat $TEST_SSHD_LOGFILE; echo) >>$OBJ/failed-sshd.log
 
 	# Save all logfiles in a tarball.
 	(cd $OBJ &&
 	  logfiles=""
 	  for i in $TEST_REGRESS_LOGFILE $TEST_SSH_LOGFILE $TEST_SSHD_LOGFILE \
 	    $TEST_SSH_LOGDIR; do
 		if [ -e "`basename $i`" ]; then
 			logfiles="$logfiles `basename $i`"
 		else
 			logfiles="$logfiles $i"
 		fi
 	  done
 	  tar cf "$tarname" $logfiles)
 }
 
 trace ()
 {
 	start_debug_log $@
 	if [ "X$TEST_SSH_TRACE" = "Xyes" ]; then
 		echo "$@"
 	fi
 }
 
 verbose ()
 {
 	start_debug_log $@
 	if [ "X$TEST_SSH_QUIET" != "Xyes" ]; then
 		echo "$@"
 	fi
 }
 
 fail ()
 {
 	save_debug_log "FAIL: $@"
 	RESULT=1
 	echo "$@"
 	if test "x$TEST_SSH_FAIL_FATAL" != "x" ; then
 		cleanup
 		exit $RESULT
 	fi
 }
 
 fatal ()
 {
 	save_debug_log "FATAL: $@"
 	printf "FATAL: "
 	fail "$@"
 	cleanup
 	exit $RESULT
 }
 
 # Skip remaining tests in script.
 skip ()
 {
 	echo "SKIPPED: $@"
 	cleanup
 	exit $RESULT
 }
 
 maybe_add_scp_path_to_sshd ()
 {
 	# If we're testing a non-installed scp, add its directory to sshd's
 	# PATH so we can test it.  We don't do this for all tests as it
 	# breaks the SetEnv tests.
 	case "$SCP" in
 	/*)	PATH_WITH_SCP="`dirname $SCP`:$PATH"
 		echo "	SetEnv PATH='$PATH_WITH_SCP'" >>$OBJ/sshd_config
 		echo "	SetEnv PATH='$PATH_WITH_SCP'" >>$OBJ/sshd_proxy ;;
 	esac
 }
 
 RESULT=0
 PIDFILE=$OBJ/pidfile
 
 trap fatal 3 2
 
 # create server config
 cat << EOF > $OBJ/sshd_config
 	StrictModes		no
 	Port			$PORT
 	AddressFamily		inet
 	ListenAddress		127.0.0.1
 	#ListenAddress		::1
 	PidFile			$PIDFILE
 	AuthorizedKeysFile	$OBJ/authorized_keys_%u
 	LogLevel		DEBUG3
 	AcceptEnv		_XXX_TEST_*
 	AcceptEnv		_XXX_TEST
 	Subsystem	sftp	$SFTPSERVER
 EOF
 
 # This may be necessary if /usr/src and/or /usr/obj are group-writable,
 # but if you aren't careful with permissions then the unit tests could
 # be abused to locally escalate privileges.
 if [ ! -z "$TEST_SSH_UNSAFE_PERMISSIONS" ]; then
 	echo "	StrictModes no" >> $OBJ/sshd_config
 else
 	# check and warn if excessive permissions are likely to cause failures.
 	unsafe=""
 	dir="${OBJ}"
 	while test ${dir} != "/"; do
 		if test -d "${dir}" && ! test -h "${dir}"; then
 			perms=`ls -ld ${dir}`
 			case "${perms}" in
 			?????w????*|????????w?*) unsafe="${unsafe} ${dir}" ;;
 			esac
 		fi
 		dir=`dirname ${dir}`
 	done
 	if ! test  -z "${unsafe}"; then
 		cat <<EOD
 
 WARNING: Unsafe (group or world writable) directory permissions found:
 ${unsafe}
 
 These could be abused to locally escalate privileges.  If you are
 sure that this is not a risk (eg there are no other users), you can
 bypass this check by setting TEST_SSH_UNSAFE_PERMISSIONS=1
 
 EOD
 	fi
 fi
 
 if [ ! -z "$TEST_SSH_MODULI_FILE" ]; then
 	trace "adding modulifile='$TEST_SSH_MODULI_FILE' to sshd_config"
 	echo "	ModuliFile '$TEST_SSH_MODULI_FILE'" >> $OBJ/sshd_config
 fi
 
 if [ ! -z "$TEST_SSH_SSHD_CONFOPTS" ]; then
 	trace "adding sshd_config option $TEST_SSH_SSHD_CONFOPTS"
 	echo "$TEST_SSH_SSHD_CONFOPTS" >> $OBJ/sshd_config
 fi
 
 # server config for proxy connects
 cp $OBJ/sshd_config $OBJ/sshd_proxy
 
 # allow group-writable directories in proxy-mode
 echo 'StrictModes no' >> $OBJ/sshd_proxy
 
 # create client config
 cat << EOF > $OBJ/ssh_config
 Host *
 	Hostname		127.0.0.1
 	HostKeyAlias		localhost-with-alias
 	Port			$PORT
 	User			$USER
 	GlobalKnownHostsFile	$OBJ/known_hosts
 	UserKnownHostsFile	$OBJ/known_hosts
 	PubkeyAuthentication	yes
 	ChallengeResponseAuthentication	no
 	PasswordAuthentication	no
 	BatchMode		yes
 	StrictHostKeyChecking	yes
 	LogLevel		DEBUG3
 EOF
 
 if [ ! -z "$TEST_SSH_SSH_CONFOPTS" ]; then
 	trace "adding ssh_config option $TEST_SSH_SSH_CONFOPTS"
 	echo "$TEST_SSH_SSH_CONFOPTS" >> $OBJ/ssh_config
 fi
 
 rm -f $OBJ/known_hosts $OBJ/authorized_keys_$USER
 
 SSH_SK_PROVIDER=
 if ! config_defined ENABLE_SK; then
 	trace skipping sk-dummy
 elif [ -f "${SRC}/misc/sk-dummy/obj/sk-dummy.so" ] ; then
 	SSH_SK_PROVIDER="${SRC}/misc/sk-dummy/obj/sk-dummy.so"
 elif [ -f "${OBJ}/misc/sk-dummy/sk-dummy.so" ] ; then
 	SSH_SK_PROVIDER="${OBJ}/misc/sk-dummy/sk-dummy.so"
 elif [ -f "${SRC}/misc/sk-dummy/sk-dummy.so" ] ; then
 	SSH_SK_PROVIDER="${SRC}/misc/sk-dummy/sk-dummy.so"
 fi
 export SSH_SK_PROVIDER
 
 if ! test -z "$SSH_SK_PROVIDER"; then
 	EXTRA_AGENT_ARGS='-P/*' # XXX want realpath(1)...
 	echo "SecurityKeyProvider $SSH_SK_PROVIDER" >> $OBJ/ssh_config
 	echo "SecurityKeyProvider $SSH_SK_PROVIDER" >> $OBJ/sshd_config
 	echo "SecurityKeyProvider $SSH_SK_PROVIDER" >> $OBJ/sshd_proxy
 fi
 export EXTRA_AGENT_ARGS
 
 maybe_filter_sk() {
 	if test -z "$SSH_SK_PROVIDER" ; then
 		grep -v ^sk
 	else
 		cat
 	fi
 }
 
 SSH_KEYTYPES=`$SSH -Q key-plain | maybe_filter_sk`
 SSH_HOSTKEY_TYPES=`$SSH -Q key-plain | maybe_filter_sk`
 
 for t in ${SSH_KEYTYPES}; do
 	# generate user key
 	if [ ! -f $OBJ/$t ] || [ ${SSHKEYGEN_BIN} -nt $OBJ/$t ]; then
 		trace "generating key type $t"
 		rm -f $OBJ/$t
 		${SSHKEYGEN} -q -N '' -t $t  -f $OBJ/$t ||\
 			fail "ssh-keygen for $t failed"
 	else
 		trace "using cached key type $t"
 	fi
 
 	# setup authorized keys
 	cat $OBJ/$t.pub >> $OBJ/authorized_keys_$USER
 	echo IdentityFile $OBJ/$t >> $OBJ/ssh_config
 done
 
 for t in ${SSH_HOSTKEY_TYPES}; do
 	# known hosts file for client
 	(
 		printf 'localhost-with-alias,127.0.0.1,::1 '
 		cat $OBJ/$t.pub
 	) >> $OBJ/known_hosts
 
 	# use key as host key, too
 	(umask 077; $SUDO cp $OBJ/$t $OBJ/host.$t)
 	echo HostKey $OBJ/host.$t >> $OBJ/sshd_config
 
 	# don't use SUDO for proxy connect
 	echo HostKey $OBJ/$t >> $OBJ/sshd_proxy
 done
 chmod 644 $OBJ/authorized_keys_$USER
 
 # Activate Twisted Conch tests if the binary is present
 REGRESS_INTEROP_CONCH=no
 if test -x "$CONCH" ; then
 	REGRESS_INTEROP_CONCH=yes
 fi
 
 # If PuTTY is present, new enough and we are running a PuTTY test, prepare
 # keys and configuration.
 REGRESS_INTEROP_PUTTY=no
 if test -x "$PUTTYGEN" -a -x "$PLINK" &&
     "$PUTTYGEN" --help 2>&1 | grep -- --new-passphrase >/dev/null; then
 	REGRESS_INTEROP_PUTTY=yes
 fi
 case "$SCRIPT" in
 *putty*)	;;
 *)		REGRESS_INTEROP_PUTTY=no ;;
 esac
 
-if test "$REGRESS_INTEROP_PUTTY" = "yes" ; then
+puttysetup() {
+	if test "x$REGRESS_INTEROP_PUTTY" != "xyes" ; then
+		skip "putty interop tests not enabled"
+	fi
+
 	mkdir -p ${OBJ}/.putty
 
 	# Add a PuTTY key to authorized_keys
 	rm -f ${OBJ}/putty.rsa2
 	if ! "$PUTTYGEN" -t rsa -o ${OBJ}/putty.rsa2 \
 	    --random-device=/dev/urandom \
 	    --new-passphrase /dev/null < /dev/null > /dev/null; then
 		echo "Your installed version of PuTTY is too old to support --new-passphrase, skipping test" >&2
 		exit 1
 	fi
 	"$PUTTYGEN" -O public-openssh ${OBJ}/putty.rsa2 \
 	    >> $OBJ/authorized_keys_$USER
 
 	# Convert rsa2 host key to PuTTY format
 	cp $OBJ/ssh-rsa $OBJ/ssh-rsa_oldfmt
 	${SSHKEYGEN} -p -N '' -m PEM -f $OBJ/ssh-rsa_oldfmt >/dev/null
 	${SRC}/ssh2putty.sh 127.0.0.1 $PORT $OBJ/ssh-rsa_oldfmt > \
 	    ${OBJ}/.putty/sshhostkeys
 	${SRC}/ssh2putty.sh 127.0.0.1 22 $OBJ/ssh-rsa_oldfmt >> \
 	    ${OBJ}/.putty/sshhostkeys
 	rm -f $OBJ/ssh-rsa_oldfmt
 
 	# Setup proxied session
 	mkdir -p ${OBJ}/.putty/sessions
 	rm -f ${OBJ}/.putty/sessions/localhost_proxy
 	echo "Protocol=ssh" >> ${OBJ}/.putty/sessions/localhost_proxy
 	echo "HostName=127.0.0.1" >> ${OBJ}/.putty/sessions/localhost_proxy
 	echo "PortNumber=$PORT" >> ${OBJ}/.putty/sessions/localhost_proxy
 	echo "ProxyMethod=5" >> ${OBJ}/.putty/sessions/localhost_proxy
 	echo "ProxyTelnetCommand=${OBJ}/sshd-log-wrapper.sh -i -f $OBJ/sshd_proxy" >> ${OBJ}/.putty/sessions/localhost_proxy
 	echo "ProxyLocalhost=1" >> ${OBJ}/.putty/sessions/localhost_proxy
 
+	PUTTYVER="`${PLINK} --version | awk '/plink: Release/{print $3}'`"
+	PUTTYMINORVER="`echo ${PUTTYVER} | cut -f2 -d.`"
+	verbose "plink version ${PUTTYVER} minor ${PUTTYMINORVER}"
+
+	# Re-enable ssh-rsa on older PuTTY versions since they don't do newer
+	# key types.
+	if [ "$PUTTYMINORVER" -lt "76" ]; then
+		echo "HostKeyAlgorithms +ssh-rsa" >> ${OBJ}/sshd_proxy
+		echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> ${OBJ}/sshd_proxy
+	fi
+
+	if [ "$PUTTYMINORVER" -le "64" ]; then
+		echo "KexAlgorithms +diffie-hellman-group14-sha1" \
+		    >>${OBJ}/sshd_proxy
+	fi
 	PUTTYDIR=${OBJ}/.putty
 	export PUTTYDIR
-fi
+}
 
 REGRESS_INTEROP_DROPBEAR=no
 if test -x "$DROPBEARKEY" -a -x "$DBCLIENT" -a -x "$DROPBEARCONVERT"; then
 	REGRESS_INTEROP_DROPBEAR=yes
 fi
 case "$SCRIPT" in
 *dropbear*)	;;
 *)		REGRESS_INTEROP_DROPBEAR=no ;;
 esac
 
 if test "$REGRESS_INTEROP_DROPBEAR" = "yes" ; then
 	trace Create dropbear keys and add to authorized_keys
 	mkdir -p $OBJ/.dropbear
 	for i in rsa ecdsa ed25519 dss; do
 		if [ ! -f "$OBJ/.dropbear/id_$i" ]; then
 			($DROPBEARKEY -t $i -f $OBJ/.dropbear/id_$i
 			$DROPBEARCONVERT dropbear openssh \
 			    $OBJ/.dropbear/id_$i $OBJ/.dropbear/ossh.id_$i
 			) > /dev/null 2>&1
 		fi
 		$SSHKEYGEN -y -f $OBJ/.dropbear/ossh.id_$i \
 		   >>$OBJ/authorized_keys_$USER
 	done
 fi
 
 # create a proxy version of the client config
 (
 	cat $OBJ/ssh_config
 	echo proxycommand ${SUDO} env SSH_SK_HELPER=\"$SSH_SK_HELPER\" ${OBJ}/sshd-log-wrapper.sh -i -f $OBJ/sshd_proxy
 ) > $OBJ/ssh_proxy
 
 # check proxy config
 ${SSHD} -t -f $OBJ/sshd_proxy	|| fatal "sshd_proxy broken"
 
 # extract proxycommand into separate shell script for use by Dropbear.
 echo '#!/bin/sh' >$OBJ/ssh_proxy.sh
 awk '/^proxycommand/' $OBJ/ssh_proxy | sed 's/^proxycommand//' \
    >>$OBJ/ssh_proxy.sh
 chmod a+x $OBJ/ssh_proxy.sh
 
 start_sshd ()
 {
 	# start sshd
 	logfile="${TEST_SSH_LOGDIR}/sshd.`$OBJ/timestamp`.$$.log"
 	$SUDO ${SSHD} -f $OBJ/sshd_config "$@" -t || fatal "sshd_config broken"
 	$SUDO env SSH_SK_HELPER="$SSH_SK_HELPER" \
 	    ${SSHD} -f $OBJ/sshd_config "$@" -E$TEST_SSHD_LOGFILE
 
 	trace "wait for sshd"
 	i=0;
 	while [ ! -f $PIDFILE -a $i -lt 10 ]; do
 		i=`expr $i + 1`
 		sleep $i
 	done
 
 	test -f $PIDFILE || fatal "no sshd running on port $PORT"
 }
 
 # Find a PKCS#11 library.
 p11_find_lib() {
 	TEST_SSH_PKCS11=""
 	for _lib in "$@" ; do
 		if test -f "$_lib" ; then
 			TEST_SSH_PKCS11="$_lib"
 			return
 		fi
 	done
 }
 
 # Perform PKCS#11 setup: prepares a softhsm2 token configuration, generated
 # keys and loads them into the virtual token.
 PKCS11_OK=
 export PKCS11_OK
 p11_setup() {
 	p11_find_lib \
 		/usr/local/lib/softhsm/libsofthsm2.so \
 		/usr/lib64/pkcs11/libsofthsm2.so \
 		/usr/lib/x86_64-linux-gnu/softhsm/libsofthsm2.so
 	test -z "$TEST_SSH_PKCS11" && return 1
 	verbose "using token library $TEST_SSH_PKCS11"
 	TEST_SSH_PIN=1234
 	TEST_SSH_SOPIN=12345678
 	if [ "x$TEST_SSH_SSHPKCS11HELPER" != "x" ]; then
 		SSH_PKCS11_HELPER="${TEST_SSH_SSHPKCS11HELPER}"
 		export SSH_PKCS11_HELPER
 	fi
 
 	# setup environment for softhsm2 token
 	SSH_SOFTHSM_DIR=$OBJ/SOFTHSM
 	export SSH_SOFTHSM_DIR
 	rm -rf $SSH_SOFTHSM_DIR
 	TOKEN=$SSH_SOFTHSM_DIR/tokendir
 	mkdir -p $TOKEN
 	SOFTHSM2_CONF=$SSH_SOFTHSM_DIR/softhsm2.conf
 	export SOFTHSM2_CONF
 	cat > $SOFTHSM2_CONF << EOF
 # SoftHSM v2 configuration file
 directories.tokendir = ${TOKEN}
 objectstore.backend = file
 # ERROR, WARNING, INFO, DEBUG
 log.level = DEBUG
 # If CKF_REMOVABLE_DEVICE flag should be set
 slots.removable = false
 EOF
 	out=$(softhsm2-util --init-token --free --label token-slot-0 --pin "$TEST_SSH_PIN" --so-pin "$TEST_SSH_SOPIN")
 	slot=$(echo -- $out | sed 's/.* //')
 	trace "generating keys"
 	# RSA key
 	RSA=${SSH_SOFTHSM_DIR}/RSA
 	RSAP8=${SSH_SOFTHSM_DIR}/RSAP8
 	$OPENSSL_BIN genpkey -algorithm rsa > $RSA 2>/dev/null || \
 	    fatal "genpkey RSA fail"
 	$OPENSSL_BIN pkcs8 -nocrypt -in $RSA > $RSAP8 || fatal "pkcs8 RSA fail"
 	softhsm2-util --slot "$slot" --label 01 --id 01 --pin "$TEST_SSH_PIN" \
 	    --import $RSAP8 >/dev/null || fatal "softhsm import RSA fail"
 	chmod 600 $RSA
 	ssh-keygen -y -f $RSA > ${RSA}.pub
 	# ECDSA key
 	ECPARAM=${SSH_SOFTHSM_DIR}/ECPARAM
 	EC=${SSH_SOFTHSM_DIR}/EC
 	ECP8=${SSH_SOFTHSM_DIR}/ECP8
 	$OPENSSL_BIN genpkey -genparam -algorithm ec \
 	    -pkeyopt ec_paramgen_curve:prime256v1 > $ECPARAM || \
 	    fatal "param EC fail"
 	$OPENSSL_BIN genpkey -paramfile $ECPARAM > $EC || \
 	    fatal "genpkey EC fail"
 	$OPENSSL_BIN pkcs8 -nocrypt -in $EC > $ECP8 || fatal "pkcs8 EC fail"
 	softhsm2-util --slot "$slot" --label 02 --id 02 --pin "$TEST_SSH_PIN" \
 	    --import $ECP8 >/dev/null || fatal "softhsm import EC fail"
 	chmod 600 $EC
 	ssh-keygen -y -f $EC > ${EC}.pub
 	# Prepare askpass script to load PIN.
 	PIN_SH=$SSH_SOFTHSM_DIR/pin.sh
 	cat > $PIN_SH << EOF
 #!/bin/sh
 echo "${TEST_SSH_PIN}"
 EOF
 	chmod 0700 "$PIN_SH"
 	PKCS11_OK=yes
 	return 0
 }
 
 # Peforms ssh-add with the right token PIN.
 p11_ssh_add() {
 	env SSH_ASKPASS="$PIN_SH" SSH_ASKPASS_REQUIRE=force ${SSHADD} "$@"
 }
 
 # source test body
 . $SCRIPT
 
 # kill sshd
 cleanup
 
 if [ "x$USE_VALGRIND" != "x" ]; then
 	# If there is an EXIT trap handler, invoke it now.
 	# Some tests set these to clean up processes such as ssh-agent.  We
 	# need to wait for all valgrind processes to complete so we can check
 	# their logs, but since the EXIT traps are not invoked until
 	# test-exec.sh exits, waiting here will deadlock.
 	# This is not very portable but then neither is valgrind itself.
 	# As a bonus, dash (as used on the runners) has a "trap" that doesn't
 	# work in a pipeline (hence the temp file) or a subshell.
 	exithandler=""
 	trap >/tmp/trap.$$ && exithandler=$(cat /tmp/trap.$$ | \
 	    awk -F "'" '/EXIT$/{print $2}')
 	rm -f /tmp/trap.$$
 	if [ "x${exithandler}" != "x" ]; then
 		verbose invoking EXIT trap handler early: ${exithandler}
 		eval "${exithandler}"
 		trap '' EXIT
 	fi
 
 	# wait for any running process to complete
 	wait; sleep 1
 	VG_RESULTS=$(find $OBJ/valgrind-out -type f -print)
 	VG_RESULT_COUNT=0
 	VG_FAIL_COUNT=0
 	for i in $VG_RESULTS; do
 		if grep "ERROR SUMMARY" $i >/dev/null; then
 			VG_RESULT_COUNT=$(($VG_RESULT_COUNT + 1))
 			if ! grep "ERROR SUMMARY: 0 errors" $i >/dev/null; then
 				VG_FAIL_COUNT=$(($VG_FAIL_COUNT + 1))
 				RESULT=1
 				verbose valgrind failure $i
 				cat $i
 			fi
 		fi
 	done
 	if [ x"$VG_SKIP" != "x" ]; then
 		verbose valgrind skipped
 	else
 		verbose valgrind results $VG_RESULT_COUNT failures $VG_FAIL_COUNT
 	fi
 fi
 
 if [ $RESULT -eq 0 ]; then
 	verbose ok $tid
 	if [ "x$CACHE" != "x" ]; then
 		touch "$CACHE"
 	fi
 else
 	echo failed $tid
 fi
 exit $RESULT
diff --git a/regress/unittests/Makefile.inc b/regress/unittests/Makefile.inc
index 623896ffa152..98e280486ab1 100644
--- a/regress/unittests/Makefile.inc
+++ b/regress/unittests/Makefile.inc
@@ -1,87 +1,92 @@
-#	$OpenBSD: Makefile.inc,v 1.15 2023/09/24 08:14:13 claudio Exp $
+#	$OpenBSD: Makefile.inc,v 1.16 2024/01/11 01:45:58 djm Exp $
 
 .include <bsd.own.mk>
 .include <bsd.obj.mk>
 
 # User-settable options
 UNITTEST_FAST?= no	# Skip slow tests (e.g. less intensive fuzzing).
 UNITTEST_SLOW?= no	# Include slower tests (e.g. more intensive fuzzing).
 UNITTEST_VERBOSE?= no	# Verbose test output (inc. per-test names).
 
 MALLOC_OPTIONS?=	CFGJRSUX
 TEST_ENV?=		MALLOC_OPTIONS=${MALLOC_OPTIONS}
 
 # XXX detect from ssh binary?
 OPENSSL?=	yes
+DSAKEY?=	yes
+
+.if (${DSAKEY:L} == "yes")
+CFLAGS+=	-DWITH_DSA
+.endif
 
 .if (${OPENSSL:L} == "yes")
 CFLAGS+=	-DWITH_OPENSSL
 .endif
 
 # enable warnings
 WARNINGS=Yes
 
 DEBUG=-g
 CFLAGS+=	-fstack-protector-all
 CDIAGFLAGS=	-Wall
 CDIAGFLAGS+=	-Wextra
 CDIAGFLAGS+=	-Werror
 CDIAGFLAGS+=	-Wchar-subscripts
 CDIAGFLAGS+=	-Wcomment
 CDIAGFLAGS+=	-Wformat
 CDIAGFLAGS+=	-Wformat-security
 CDIAGFLAGS+=	-Wimplicit
 CDIAGFLAGS+=	-Winline
 CDIAGFLAGS+=	-Wmissing-declarations
 CDIAGFLAGS+=	-Wmissing-prototypes
 CDIAGFLAGS+=	-Wparentheses
 CDIAGFLAGS+=	-Wpointer-arith
 CDIAGFLAGS+=	-Wreturn-type
 CDIAGFLAGS+=	-Wshadow
 CDIAGFLAGS+=	-Wsign-compare
 CDIAGFLAGS+=	-Wstrict-aliasing
 CDIAGFLAGS+=	-Wstrict-prototypes
 CDIAGFLAGS+=	-Wswitch
 CDIAGFLAGS+=	-Wtrigraphs
 CDIAGFLAGS+=	-Wuninitialized
 CDIAGFLAGS+=	-Wunused
 CDIAGFLAGS+=	-Wno-unused-parameter
 .if ${COMPILER_VERSION:L} != "gcc3"
 CDIAGFLAGS+=	-Wold-style-definition
 .endif
 
 SSHREL=../../../../../usr.bin/ssh
 
 CFLAGS+=-I${.CURDIR}/../test_helper -I${.CURDIR}/${SSHREL}
 
 .if exists(${.CURDIR}/../test_helper/${__objdir})
 LDADD+=-L${.CURDIR}/../test_helper/${__objdir} -ltest_helper
 DPADD+=${.CURDIR}/../test_helper/${__objdir}/libtest_helper.a
 .else
 LDADD+=-L${.CURDIR}/../test_helper -ltest_helper
 DPADD+=${.CURDIR}/../test_helper/libtest_helper.a
 .endif
 
 .PATH: ${.CURDIR}/${SSHREL}
 
 LDADD+= -lutil
 DPADD+= ${LIBUTIL}
 
 .if (${OPENSSL:L} == "yes")
 LDADD+= -lcrypto
 DPADD+= ${LIBCRYPTO}
 .endif
 
 LDADD+= -lfido2 -lcbor -lusbhid
 DPADD+= ${LIBFIDO2} ${LIBCBOR} ${LIBUSBHID}
 
 UNITTEST_ARGS?=
 
 .if (${UNITTEST_VERBOSE:L} != "no")
 UNITTEST_ARGS+= -v
 .endif
 .if (${UNITTEST_FAST:L} != "no")
 UNITTEST_ARGS+= -f
 .elif (${UNITTEST_SLOW:L} != "no")
 UNITTEST_ARGS+= -F
 .endif
diff --git a/regress/unittests/hostkeys/test_iterate.c b/regress/unittests/hostkeys/test_iterate.c
index 84f26b5c72f5..7efb8e1b9cc6 100644
--- a/regress/unittests/hostkeys/test_iterate.c
+++ b/regress/unittests/hostkeys/test_iterate.c
@@ -1,1117 +1,1126 @@
-/* 	$OpenBSD: test_iterate.c,v 1.8 2021/12/14 21:25:27 deraadt Exp $ */
+/* 	$OpenBSD: test_iterate.c,v 1.9 2024/01/11 01:45:58 djm Exp $ */
 /*
  * Regress test for hostfile.h hostkeys_foreach()
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 
 #include "../test_helper/test_helper.h"
 
 #include "sshkey.h"
 #include "authfile.h"
 #include "hostfile.h"
 
 struct expected {
 	const char *key_file;		/* Path for key, NULL for none */
 	int no_parse_status;		/* Expected status w/o key parsing */
 	int no_parse_keytype;		/* Expected keytype w/o key parsing */
 	int match_host_p;		/* Match 'prometheus.example.com' */
 	int match_host_s;		/* Match 'sisyphus.example.com' */
 	int match_ipv4;			/* Match '192.0.2.1' */
 	int match_ipv6;			/* Match '2001:db8::1' */
 	int match_flags;		/* Expected flags from match */
 	struct hostkey_foreach_line l;	/* Expected line contents */
 };
 
 struct cbctx {
 	const struct expected *expected;
 	size_t nexpected;
 	size_t i;
 	int flags;
 	int match_host_p;
 	int match_host_s;
 	int match_ipv4;
 	int match_ipv6;
 };
 
 /*
  * hostkeys_foreach() iterator callback that verifies the line passed
  * against an array of expected entries.
  */
 static int
 check(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct cbctx *ctx = (struct cbctx *)_ctx;
 	const struct expected *expected;
 	int parse_key = (ctx->flags & HKF_WANT_PARSE_KEY) != 0;
 	const int matching = (ctx->flags & HKF_WANT_MATCH) != 0;
 	u_int expected_status, expected_match;
 	int expected_keytype, skip = 0;
 
 	test_subtest_info("entry %zu/%zu, file line %ld",
 	    ctx->i + 1, ctx->nexpected, l->linenum);
 
 	for (;;) {
 		ASSERT_SIZE_T_LT(ctx->i, ctx->nexpected);
 		expected = ctx->expected + ctx->i++;
 		/* If we are matching host/IP then skip entries that don't */
 		if (!matching)
 			break;
 		if (ctx->match_host_p && expected->match_host_p)
 			break;
 		if (ctx->match_host_s && expected->match_host_s)
 			break;
 		if (ctx->match_ipv4 && expected->match_ipv4)
 			break;
 		if (ctx->match_ipv6 && expected->match_ipv6)
 			break;
 	}
 	expected_status = (parse_key || expected->no_parse_status < 0) ?
 	    expected->l.status : (u_int)expected->no_parse_status;
 	expected_match = expected->l.match;
 #define UPDATE_MATCH_STATUS(x) do { \
 		if (ctx->x && expected->x) { \
 			expected_match |= expected->x; \
 			if (expected_status == HKF_STATUS_OK) \
 				expected_status = HKF_STATUS_MATCHED; \
 		} \
 	} while (0)
 	expected_keytype = (parse_key || expected->no_parse_keytype < 0) ?
 	    expected->l.keytype : expected->no_parse_keytype;
 
 #ifndef OPENSSL_HAS_ECC
 	if (expected->l.keytype == KEY_ECDSA ||
 	    expected->no_parse_keytype == KEY_ECDSA)
 		skip = 1;
 #endif /* OPENSSL_HAS_ECC */
+#ifndef WITH_DSA
+	if (expected->l.keytype == KEY_DSA ||
+	    expected->no_parse_keytype == KEY_DSA)
+		skip = 1;
+#endif
 #ifndef WITH_OPENSSL
 	if (expected->l.keytype == KEY_DSA ||
 	    expected->no_parse_keytype == KEY_DSA ||
 	    expected->l.keytype == KEY_RSA ||
 	    expected->no_parse_keytype == KEY_RSA ||
 	    expected->l.keytype == KEY_ECDSA ||
 	    expected->no_parse_keytype == KEY_ECDSA)
 		skip = 1;
 #endif /* WITH_OPENSSL */
 	if (skip) {
 		expected_status = HKF_STATUS_INVALID;
 		expected_keytype = KEY_UNSPEC;
 		parse_key = 0;
 	}
 	UPDATE_MATCH_STATUS(match_host_p);
 	UPDATE_MATCH_STATUS(match_host_s);
 	UPDATE_MATCH_STATUS(match_ipv4);
 	UPDATE_MATCH_STATUS(match_ipv6);
 
 	ASSERT_PTR_NE(l->path, NULL); /* Don't care about path */
 	ASSERT_LONG_LONG_EQ(l->linenum, expected->l.linenum);
 	ASSERT_U_INT_EQ(l->status, expected_status);
 	ASSERT_U_INT_EQ(l->match, expected_match);
 	/* Not all test entries contain fulltext */
 	if (expected->l.line != NULL)
 		ASSERT_STRING_EQ(l->line, expected->l.line);
 	ASSERT_INT_EQ(l->marker, expected->l.marker);
 	/* XXX we skip hashed hostnames for now; implement checking */
 	if (expected->l.hosts != NULL)
 		ASSERT_STRING_EQ(l->hosts, expected->l.hosts);
 	/* Not all test entries contain raw keys */
 	if (expected->l.rawkey != NULL)
 		ASSERT_STRING_EQ(l->rawkey, expected->l.rawkey);
 	/* XXX synthesise raw key for cases lacking and compare */
 	ASSERT_INT_EQ(l->keytype, expected_keytype);
 	if (parse_key) {
 		if (expected->l.key == NULL)
 			ASSERT_PTR_EQ(l->key, NULL);
 		if (expected->l.key != NULL) {
 			ASSERT_PTR_NE(l->key, NULL);
 			ASSERT_INT_EQ(sshkey_equal(l->key, expected->l.key), 1);
 		}
 	}
 	if (parse_key && !(l->comment == NULL && expected->l.comment == NULL))
 		ASSERT_STRING_EQ(l->comment, expected->l.comment);
 	return 0;
 }
 
 /* Loads public keys for a set of expected results */
 static void
 prepare_expected(struct expected *expected, size_t n)
 {
 	size_t i;
 
 	for (i = 0; i < n; i++) {
 		if (expected[i].key_file == NULL)
 			continue;
 #ifndef OPENSSL_HAS_ECC
 		if (expected[i].l.keytype == KEY_ECDSA)
 			continue;
 #endif /* OPENSSL_HAS_ECC */
+#ifndef WITH_DSA
+		if (expected[i].l.keytype == KEY_DSA)
+			continue;
+#endif
 #ifndef WITH_OPENSSL
 		switch (expected[i].l.keytype) {
 		case KEY_RSA:
 		case KEY_DSA:
 		case KEY_ECDSA:
 			continue;
 		}
 #endif /* WITH_OPENSSL */
 		ASSERT_INT_EQ(sshkey_load_public(
 		    test_data_file(expected[i].key_file), &expected[i].l.key,
 		    NULL), 0);
 	}
 }
 
 static void
 cleanup_expected(struct expected *expected, size_t n)
 {
 	size_t i;
 
 	for (i = 0; i < n; i++) {
 		sshkey_free(expected[i].l.key);
 		expected[i].l.key = NULL;
 	}
 }
 
 struct expected expected_full[] = {
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,				/* path, don't care */
 		1,				/* line number */
 		HKF_STATUS_COMMENT,		/* status */
 		0,				/* match flags */
 		"# Plain host keys, plain host names", /* full line, optional */
 		MRK_NONE,			/* marker (CA / revoked) */
 		NULL,				/* hosts text */
 		NULL,				/* raw key, optional */
 		KEY_UNSPEC,			/* key type */
 		NULL,				/* deserialised key */
 		NULL,				/* comment */
 		0,				/* note */
 	} },
 	{ "dsa_1.pub" , -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		2,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #1",
 		0,
 	} },
 	{ "ecdsa_1.pub" , -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		3,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #1",
 		0,
 	} },
 	{ "ed25519_1.pub" , -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		4,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #1",
 		0,
 	} },
 	{ "rsa_1.pub" , -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		5,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #1",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		6,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		7,
 		HKF_STATUS_COMMENT,
 		0,
 		"# Plain host keys, hostnames + addresses",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ "dsa_2.pub" , -1, -1, HKF_MATCH_HOST, 0, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		8,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com,192.0.2.1,2001:db8::1",
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #2",
 		0,
 	} },
 	{ "ecdsa_2.pub" , -1, -1, HKF_MATCH_HOST, 0, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		9,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com,192.0.2.1,2001:db8::1",
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #2",
 		0,
 	} },
 	{ "ed25519_2.pub" , -1, -1, HKF_MATCH_HOST, 0, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		10,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com,192.0.2.1,2001:db8::1",
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #2",
 		0,
 	} },
 	{ "rsa_2.pub" , -1, -1, HKF_MATCH_HOST, 0, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		11,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com,192.0.2.1,2001:db8::1",
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #2",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		12,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		13,
 		HKF_STATUS_COMMENT,
 		0,
 		"# Some hosts with wildcard names / IPs",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ "dsa_3.pub" , -1, -1, HKF_MATCH_HOST, HKF_MATCH_HOST, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		14,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"*.example.com,192.0.2.*,2001:*",
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #3",
 		0,
 	} },
 	{ "ecdsa_3.pub" , -1, -1, HKF_MATCH_HOST, HKF_MATCH_HOST, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		15,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"*.example.com,192.0.2.*,2001:*",
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #3",
 		0,
 	} },
 	{ "ed25519_3.pub" , -1, -1, HKF_MATCH_HOST, HKF_MATCH_HOST, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		16,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"*.example.com,192.0.2.*,2001:*",
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #3",
 		0,
 	} },
 	{ "rsa_3.pub" , -1, -1, HKF_MATCH_HOST, HKF_MATCH_HOST, HKF_MATCH_IP, HKF_MATCH_IP, -1, {
 		NULL,
 		17,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		"*.example.com,192.0.2.*,2001:*",
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #3",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		18,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		19,
 		HKF_STATUS_COMMENT,
 		0,
 		"# Hashed hostname and address entries",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ "dsa_5.pub" , -1, -1, 0, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, -1, {
 		NULL,
 		20,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #5",
 		0,
 	} },
 	{ "ecdsa_5.pub" , -1, -1, 0, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, -1, {
 		NULL,
 		21,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #5",
 		0,
 	} },
 	{ "ed25519_5.pub" , -1, -1, 0, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, -1, {
 		NULL,
 		22,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #5",
 		0,
 	} },
 	{ "rsa_5.pub" , -1, -1, 0, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, -1, {
 		NULL,
 		23,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #5",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		24,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	/*
 	 * The next series have each key listed multiple times, as the
 	 * hostname and addresses in the pre-hashed known_hosts are split
 	 * to separate lines.
 	 */
 	{ "dsa_6.pub" , -1, -1, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, 0, -1, {
 		NULL,
 		25,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #6",
 		0,
 	} },
 	{ "dsa_6.pub" , -1, -1, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, 0, -1, {
 		NULL,
 		26,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #6",
 		0,
 	} },
 	{ "dsa_6.pub" , -1, -1, 0, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, -1, {
 		NULL,
 		27,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #6",
 		0,
 	} },
 	{ "ecdsa_6.pub" , -1, -1, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, 0, -1, {
 		NULL,
 		28,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #6",
 		0,
 	} },
 	{ "ecdsa_6.pub" , -1, -1, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, 0, -1, {
 		NULL,
 		29,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #6",
 		0,
 	} },
 	{ "ecdsa_6.pub" , -1, -1, 0, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, -1, {
 		NULL,
 		30,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #6",
 		0,
 	} },
 	{ "ed25519_6.pub" , -1, -1, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, 0, -1, {
 		NULL,
 		31,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #6",
 		0,
 	} },
 	{ "ed25519_6.pub" , -1, -1, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, 0, -1, {
 		NULL,
 		32,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #6",
 		0,
 	} },
 	{ "ed25519_6.pub" , -1, -1, 0, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, -1, {
 		NULL,
 		33,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #6",
 		0,
 	} },
 	{ "rsa_6.pub" , -1, -1, HKF_MATCH_HOST|HKF_MATCH_HOST_HASHED, 0, 0, 0, -1, {
 		NULL,
 		34,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #6",
 		0,
 	} },
 	{ "rsa_6.pub" , -1, -1, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, 0, -1, {
 		NULL,
 		35,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #6",
 		0,
 	} },
 	{ "rsa_6.pub" , -1, -1, 0, 0, 0, HKF_MATCH_IP|HKF_MATCH_IP_HASHED, -1, {
 		NULL,
 		36,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_RSA,
 		NULL,	/* filled at runtime */
 		"RSA #6",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		37,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		38,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		39,
 		HKF_STATUS_COMMENT,
 		0,
 		"# Revoked and CA keys",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ "ed25519_4.pub" , -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		40,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_REVOKE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_ED25519,
 		NULL,	/* filled at runtime */
 		"ED25519 #4",
 		0,
 	} },
 	{ "ecdsa_4.pub" , -1, -1, HKF_MATCH_HOST, 0, 0, 0, -1, {
 		NULL,
 		41,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_CA,
 		"prometheus.example.com",
 		NULL,
 		KEY_ECDSA,
 		NULL,	/* filled at runtime */
 		"ECDSA #4",
 		0,
 	} },
 	{ "dsa_4.pub" , -1, -1, HKF_MATCH_HOST, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		42,
 		HKF_STATUS_OK,
 		0,
 		NULL,
 		MRK_CA,
 		"*.example.com",
 		NULL,
 		KEY_DSA,
 		NULL,	/* filled at runtime */
 		"DSA #4",
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		43,
 		HKF_STATUS_COMMENT,
 		0,
 		"",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		44,
 		HKF_STATUS_COMMENT,
 		0,
 		"# Some invalid lines",
 		MRK_NONE,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, 0, 0, 0, -1, {
 		NULL,
 		45,
 		HKF_STATUS_INVALID,
 		0,
 		NULL,
 		MRK_ERROR,
 		NULL,
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		46,
 		HKF_STATUS_INVALID,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, HKF_MATCH_HOST, 0, 0, 0, -1, {
 		NULL,
 		47,
 		HKF_STATUS_INVALID,
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com",
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		48,
 		HKF_STATUS_INVALID,	/* Would be ok if key not parsed */
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_UNSPEC,
 		NULL,
 		NULL,
 		0,
 	} },
 	{ NULL, -1, -1, 0, HKF_MATCH_HOST, 0, 0, -1, {
 		NULL,
 		49,
 		HKF_STATUS_INVALID,
 		0,
 		NULL,
 		MRK_NONE,
 		"sisyphus.example.com",
 		NULL,
 		KEY_UNSPEC,
 		NULL,	/* filled at runtime */
 		NULL,
 		0,
 	} },
 	{ NULL, HKF_STATUS_OK, KEY_RSA, HKF_MATCH_HOST, 0, 0, 0, -1, {
 		NULL,
 		50,
 		HKF_STATUS_INVALID,	/* Would be ok if key not parsed */
 		0,
 		NULL,
 		MRK_NONE,
 		"prometheus.example.com",
 		NULL,
 		KEY_UNSPEC,
 		NULL,	/* filled at runtime */
 		NULL,
 		0,
 	} },
 };
 
 void test_iterate(void);
 
 void
 test_iterate(void)
 {
 	struct cbctx ctx;
 
 	TEST_START("hostkeys_iterate all with key parse");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_PARSE_KEY;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, NULL, NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate all without key parse");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, NULL, NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify host 1");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	ctx.match_host_p = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "prometheus.example.com", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify host 2");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	ctx.match_host_s = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "sisyphus.example.com", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match host 1");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	ctx.match_host_p = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "prometheus.example.com", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match host 2");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	ctx.match_host_s = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "sisyphus.example.com", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify host missing");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "actaeon.example.org", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match host missing");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "actaeon.example.org", NULL, ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify IPv4");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	ctx.match_ipv4 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "192.0.2.1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify IPv6");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	ctx.match_ipv6 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "2001:db8::1",
 	    ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match IPv4");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	ctx.match_ipv4 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "192.0.2.1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match IPv6");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	ctx.match_ipv6 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "2001:db8::1",
 	    ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify addr missing");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "192.168.0.1",
 	    ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match addr missing");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "tiresias.example.org", "::1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify host 2 and IPv4");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = 0;
 	ctx.match_host_s = 1;
 	ctx.match_ipv4 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "sisyphus.example.com", "192.0.2.1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match host 1 and IPv6");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH;
 	ctx.match_host_p = 1;
 	ctx.match_ipv6 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "prometheus.example.com",
 	    "2001:db8::1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate specify host 2 and IPv4 w/ key parse");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_PARSE_KEY;
 	ctx.match_host_s = 1;
 	ctx.match_ipv4 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "sisyphus.example.com", "192.0.2.1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 
 	TEST_START("hostkeys_iterate match host 1 and IPv6 w/ key parse");
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.expected = expected_full;
 	ctx.nexpected = sizeof(expected_full)/sizeof(*expected_full);
 	ctx.flags = HKF_WANT_MATCH|HKF_WANT_PARSE_KEY;
 	ctx.match_host_p = 1;
 	ctx.match_ipv6 = 1;
 	prepare_expected(expected_full, ctx.nexpected);
 	ASSERT_INT_EQ(hostkeys_foreach(test_data_file("known_hosts"),
 	    check, &ctx, "prometheus.example.com",
 	    "2001:db8::1", ctx.flags, 0), 0);
 	cleanup_expected(expected_full, ctx.nexpected);
 	TEST_DONE();
 }
 
diff --git a/regress/unittests/kex/test_kex.c b/regress/unittests/kex/test_kex.c
index c26761ee7c48..dc1014ea4492 100644
--- a/regress/unittests/kex/test_kex.c
+++ b/regress/unittests/kex/test_kex.c
@@ -1,208 +1,210 @@
-/* 	$OpenBSD: test_kex.c,v 1.6 2021/12/14 21:25:27 deraadt Exp $ */
+/* 	$OpenBSD: test_kex.c,v 1.7 2024/01/11 01:45:58 djm Exp $ */
 /*
  * Regress test KEX
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 
 #include "../test_helper/test_helper.h"
 
 #include "ssherr.h"
 #include "ssh_api.h"
 #include "sshbuf.h"
 #include "packet.h"
 #include "myproposal.h"
 
 void kex_tests(void);
 static int do_debug = 0;
 
 static int
 do_send_and_receive(struct ssh *from, struct ssh *to)
 {
 	u_char type;
 	size_t len;
 	const u_char *buf;
 	int r;
 
 	for (;;) {
 		if ((r = ssh_packet_next(from, &type)) != 0) {
 			fprintf(stderr, "ssh_packet_next: %s\n", ssh_err(r));
 			return r;
 		}
 		if (type != 0)
 			return 0;
 		buf = ssh_output_ptr(from, &len);
 		if (do_debug)
 			printf("%zu", len);
 		if (len == 0)
 			return 0;
 		if ((r = ssh_output_consume(from, len)) != 0 ||
 		    (r = ssh_input_append(to, buf, len)) != 0)
 			return r;
 	}
 }
 
 static void
 run_kex(struct ssh *client, struct ssh *server)
 {
 	int r = 0;
 
 	while (!server->kex->done || !client->kex->done) {
 		if (do_debug)
 			printf(" S:");
 		if ((r = do_send_and_receive(server, client)))
 			break;
 		if (do_debug)
 			printf(" C:");
 		if ((r = do_send_and_receive(client, server)))
 			break;
 	}
 	if (do_debug)
 		printf("done: %s\n", ssh_err(r));
 	ASSERT_INT_EQ(r, 0);
 	ASSERT_INT_EQ(server->kex->done, 1);
 	ASSERT_INT_EQ(client->kex->done, 1);
 }
 
 static void
 do_kex_with_key(char *kex, int keytype, int bits)
 {
 	struct ssh *client = NULL, *server = NULL, *server2 = NULL;
 	struct sshkey *private, *public;
 	struct sshbuf *state;
 	struct kex_params kex_params;
 	char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
 	char *keyname = NULL;
 
 	TEST_START("sshkey_generate");
 	ASSERT_INT_EQ(sshkey_generate(keytype, bits, &private), 0);
 	TEST_DONE();
 
 	TEST_START("sshkey_from_private");
 	ASSERT_INT_EQ(sshkey_from_private(private, &public), 0);
 	TEST_DONE();
 
 	TEST_START("ssh_init");
 	memcpy(kex_params.proposal, myproposal, sizeof(myproposal));
 	if (kex != NULL)
 		kex_params.proposal[PROPOSAL_KEX_ALGS] = kex;
 	keyname = strdup(sshkey_ssh_name(private));
 	ASSERT_PTR_NE(keyname, NULL);
 	kex_params.proposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = keyname;
 	ASSERT_INT_EQ(ssh_init(&client, 0, &kex_params), 0);
 	ASSERT_INT_EQ(ssh_init(&server, 1, &kex_params), 0);
 	ASSERT_PTR_NE(client, NULL);
 	ASSERT_PTR_NE(server, NULL);
 	TEST_DONE();
 
 	TEST_START("ssh_add_hostkey");
 	ASSERT_INT_EQ(ssh_add_hostkey(server, private), 0);
 	ASSERT_INT_EQ(ssh_add_hostkey(client, public), 0);
 	TEST_DONE();
 
 	TEST_START("kex");
 	run_kex(client, server);
 	TEST_DONE();
 
 	TEST_START("rekeying client");
 	ASSERT_INT_EQ(kex_send_kexinit(client), 0);
 	run_kex(client, server);
 	TEST_DONE();
 
 	TEST_START("rekeying server");
 	ASSERT_INT_EQ(kex_send_kexinit(server), 0);
 	run_kex(client, server);
 	TEST_DONE();
 
 	TEST_START("ssh_packet_get_state");
 	state = sshbuf_new();
 	ASSERT_PTR_NE(state, NULL);
 	ASSERT_INT_EQ(ssh_packet_get_state(server, state), 0);
 	ASSERT_INT_GE(sshbuf_len(state), 1);
 	TEST_DONE();
 
 	TEST_START("ssh_packet_set_state");
 	server2 = NULL;
 	ASSERT_INT_EQ(ssh_init(&server2, 1, NULL), 0);
 	ASSERT_PTR_NE(server2, NULL);
 	ASSERT_INT_EQ(ssh_add_hostkey(server2, private), 0);
 	ASSERT_INT_EQ(ssh_packet_set_state(server2, state), 0);
 	ASSERT_INT_EQ(sshbuf_len(state), 0);
 	sshbuf_free(state);
 	ASSERT_PTR_NE(server2->kex, NULL);
 	/* XXX we need to set the callbacks */
 #ifdef WITH_OPENSSL
 	server2->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server;
 	server2->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server;
 	server2->kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
 	server2->kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
 #ifdef OPENSSL_HAS_ECC
 	server2->kex->kex[KEX_ECDH_SHA2] = kex_gen_server;
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 	server2->kex->kex[KEX_C25519_SHA256] = kex_gen_server;
 	server2->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server;
 	server2->kex->load_host_public_key = server->kex->load_host_public_key;
 	server2->kex->load_host_private_key = server->kex->load_host_private_key;
 	server2->kex->sign = server->kex->sign;
 	TEST_DONE();
 
 	TEST_START("rekeying server2");
 	ASSERT_INT_EQ(kex_send_kexinit(server2), 0);
 	run_kex(client, server2);
 	ASSERT_INT_EQ(kex_send_kexinit(client), 0);
 	run_kex(client, server2);
 	TEST_DONE();
 
 	TEST_START("cleanup");
 	sshkey_free(private);
 	sshkey_free(public);
 	ssh_free(client);
 	ssh_free(server);
 	ssh_free(server2);
 	free(keyname);
 	TEST_DONE();
 }
 
 static void
 do_kex(char *kex)
 {
 #ifdef WITH_OPENSSL
 	do_kex_with_key(kex, KEY_RSA, 2048);
+#ifdef WITH_DSA
 	do_kex_with_key(kex, KEY_DSA, 1024);
+#endif
 #ifdef OPENSSL_HAS_ECC
 	do_kex_with_key(kex, KEY_ECDSA, 256);
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 	do_kex_with_key(kex, KEY_ED25519, 256);
 }
 
 void
 kex_tests(void)
 {
 	do_kex("curve25519-sha256@libssh.org");
 #ifdef WITH_OPENSSL
 #ifdef OPENSSL_HAS_ECC
 	do_kex("ecdh-sha2-nistp256");
 	do_kex("ecdh-sha2-nistp384");
 	do_kex("ecdh-sha2-nistp521");
 #endif /* OPENSSL_HAS_ECC */
 	do_kex("diffie-hellman-group-exchange-sha256");
 	do_kex("diffie-hellman-group-exchange-sha1");
 	do_kex("diffie-hellman-group14-sha1");
 	do_kex("diffie-hellman-group1-sha1");
 # ifdef USE_SNTRUP761X25519
 	do_kex("sntrup761x25519-sha512@openssh.com");
 # endif /* USE_SNTRUP761X25519 */
 #endif /* WITH_OPENSSL */
 }
diff --git a/regress/unittests/sshkey/test_file.c b/regress/unittests/sshkey/test_file.c
index 488944c3b76b..45284059657b 100644
--- a/regress/unittests/sshkey/test_file.c
+++ b/regress/unittests/sshkey/test_file.c
@@ -1,561 +1,563 @@
-/* 	$OpenBSD: test_file.c,v 1.10 2021/12/14 21:25:27 deraadt Exp $ */
+/* 	$OpenBSD: test_file.c,v 1.11 2024/01/11 01:45:58 djm Exp $ */
 /*
  * Regress test for sshkey.h key management API
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
 #include <openssl/objects.h>
 #ifdef OPENSSL_HAS_NISTP256
 # include <openssl/ec.h>
 #endif /* OPENSSL_HAS_NISTP256 */
 #endif /* WITH_OPENSSL */
 
 #include "../test_helper/test_helper.h"
 
 #include "ssherr.h"
 #include "authfile.h"
 #include "sshkey.h"
 #include "sshbuf.h"
 #include "digest.h"
 
 #include "common.h"
 
 void sshkey_file_tests(void);
 
 void
 sshkey_file_tests(void)
 {
 	struct sshkey *k1, *k2;
 	struct sshbuf *buf, *pw;
 #ifdef WITH_OPENSSL
 	BIGNUM *a, *b, *c;
 #endif
 	char *cp;
 
 	TEST_START("load passphrase");
 	pw = load_text_file("pw");
 	TEST_DONE();
 
 
 #ifdef WITH_OPENSSL
 	TEST_START("parse RSA from private");
 	buf = load_file("rsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	a = load_bignum("rsa_1.param.n");
 	b = load_bignum("rsa_1.param.p");
 	c = load_bignum("rsa_1.param.q");
 	ASSERT_BIGNUM_EQ(rsa_n(k1), a);
 	ASSERT_BIGNUM_EQ(rsa_p(k1), b);
 	ASSERT_BIGNUM_EQ(rsa_q(k1), c);
 	BN_free(a);
 	BN_free(b);
 	BN_free(c);
 	TEST_DONE();
 
 	TEST_START("parse RSA from private w/ passphrase");
 	buf = load_file("rsa_1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse RSA from new-format");
 	buf = load_file("rsa_n");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse RSA from new-format w/ passphrase");
 	buf = load_file("rsa_n_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load RSA from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_1.pub"), &k2,
 	    NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load RSA cert with SHA1 signature");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1_sha1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_RSA_CERT);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	ASSERT_STRING_EQ(k2->cert->signature_type, "ssh-rsa");
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load RSA cert with SHA512 signature");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1_sha512"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_RSA_CERT);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	ASSERT_STRING_EQ(k2->cert->signature_type, "rsa-sha2-512");
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load RSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_RSA_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("RSA key hex fingerprint");
 	buf = load_text_file("rsa_1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("RSA cert hex fingerprint");
 	buf = load_text_file("rsa_1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("RSA key bubblebabble fingerprint");
 	buf = load_text_file("rsa_1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
 
+#ifdef WITH_DSA
 	TEST_START("parse DSA from private");
 	buf = load_file("dsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	a = load_bignum("dsa_1.param.g");
 	b = load_bignum("dsa_1.param.priv");
 	c = load_bignum("dsa_1.param.pub");
 	ASSERT_BIGNUM_EQ(dsa_g(k1), a);
 	ASSERT_BIGNUM_EQ(dsa_priv_key(k1), b);
 	ASSERT_BIGNUM_EQ(dsa_pub_key(k1), c);
 	BN_free(a);
 	BN_free(b);
 	BN_free(c);
 	TEST_DONE();
 
 	TEST_START("parse DSA from private w/ passphrase");
 	buf = load_file("dsa_1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse DSA from new-format");
 	buf = load_file("dsa_n");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse DSA from new-format w/ passphrase");
 	buf = load_file("dsa_n_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load DSA from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("dsa_1.pub"), &k2,
 	    NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load DSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("dsa_1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_DSA_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("DSA key hex fingerprint");
 	buf = load_text_file("dsa_1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("DSA cert hex fingerprint");
 	buf = load_text_file("dsa_1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("DSA key bubblebabble fingerprint");
 	buf = load_text_file("dsa_1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("parse ECDSA from private");
 	buf = load_file("ecdsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	buf = load_text_file("ecdsa_1.param.curve");
 	ASSERT_STRING_EQ((const char *)sshbuf_ptr(buf),
 	    OBJ_nid2sn(k1->ecdsa_nid));
 	sshbuf_free(buf);
 #ifndef OPENSSL_IS_BORINGSSL /* lacks EC_POINT_point2bn() */
 	a = load_bignum("ecdsa_1.param.priv");
 	b = load_bignum("ecdsa_1.param.pub");
 	c = EC_POINT_point2bn(EC_KEY_get0_group(k1->ecdsa),
 	    EC_KEY_get0_public_key(k1->ecdsa), POINT_CONVERSION_UNCOMPRESSED,
 	    NULL, NULL);
 	ASSERT_PTR_NE(c, NULL);
 	ASSERT_BIGNUM_EQ(EC_KEY_get0_private_key(k1->ecdsa), a);
 	ASSERT_BIGNUM_EQ(b, c);
 	BN_free(a);
 	BN_free(b);
 	BN_free(c);
 #endif /* OPENSSL_IS_BORINGSSL */
 	TEST_DONE();
 
 	TEST_START("parse ECDSA from private w/ passphrase");
 	buf = load_file("ecdsa_1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse ECDSA from new-format");
 	buf = load_file("ecdsa_n");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("parse ECDSA from new-format w/ passphrase");
 	buf = load_file("ecdsa_n_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load ECDSA from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ecdsa_1.pub"), &k2,
 	    NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load ECDSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ecdsa_1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_ECDSA_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("ECDSA key hex fingerprint");
 	buf = load_text_file("ecdsa_1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("ECDSA cert hex fingerprint");
 	buf = load_text_file("ecdsa_1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("ECDSA key bubblebabble fingerprint");
 	buf = load_text_file("ecdsa_1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("parse Ed25519 from private");
 	buf = load_file("ed25519_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_INT_EQ(k1->type, KEY_ED25519);
 	/* XXX check key contents */
 	TEST_DONE();
 
 	TEST_START("parse Ed25519 from private w/ passphrase");
 	buf = load_file("ed25519_1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load Ed25519 from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ed25519_1.pub"), &k2,
 	    NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load Ed25519 cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ed25519_1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_ED25519_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("Ed25519 key hex fingerprint");
 	buf = load_text_file("ed25519_1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("Ed25519 cert hex fingerprint");
 	buf = load_text_file("ed25519_1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("Ed25519 key bubblebabble fingerprint");
 	buf = load_text_file("ed25519_1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
 
 #ifdef ENABLE_SK
 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
 	TEST_START("parse ECDSA-SK from private");
 	buf = load_file("ecdsa_sk1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_INT_EQ(k1->type, KEY_ECDSA_SK);
 	TEST_DONE();
 
 	TEST_START("parse ECDSA-SK from private w/ passphrase");
 	buf = load_file("ecdsa_sk1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load ECDSA-SK from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ecdsa_sk1.pub"), &k2,
 	    NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load ECDSA-SK cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ecdsa_sk1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_ECDSA_SK_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("ECDSA-SK key hex fingerprint");
 	buf = load_text_file("ecdsa_sk1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("ECDSA-SK cert hex fingerprint");
 	buf = load_text_file("ecdsa_sk1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("ECDSA-SK key bubblebabble fingerprint");
 	buf = load_text_file("ecdsa_sk1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
 #endif
 
 	TEST_START("parse Ed25519-SK from private");
 	buf = load_file("ed25519_sk1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_INT_EQ(k1->type, KEY_ED25519_SK);
 	/* XXX check key contents */
 	TEST_DONE();
 
 	TEST_START("parse Ed25519-SK from private w/ passphrase");
 	buf = load_file("ed25519_sk1_pw");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf,
 	    (const char *)sshbuf_ptr(pw), &k2, NULL), 0);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load Ed25519-SK from public");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ed25519_sk1.pub"),
 	    &k2, NULL), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("load Ed25519-SK cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ed25519_sk1"), &k2), 0);
 	ASSERT_PTR_NE(k2, NULL);
 	ASSERT_INT_EQ(k2->type, KEY_ED25519_SK_CERT);
 	ASSERT_INT_EQ(sshkey_equal(k1, k2), 0);
 	ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
 	TEST_DONE();
 
 	TEST_START("Ed25519-SK key hex fingerprint");
 	buf = load_text_file("ed25519_sk1.fp");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	TEST_START("Ed25519-SK cert hex fingerprint");
 	buf = load_text_file("ed25519_sk1-cert.fp");
 	cp = sshkey_fingerprint(k2, SSH_DIGEST_SHA256, SSH_FP_BASE64);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("Ed25519-SK key bubblebabble fingerprint");
 	buf = load_text_file("ed25519_sk1.fp.bb");
 	cp = sshkey_fingerprint(k1, SSH_DIGEST_SHA1, SSH_FP_BUBBLEBABBLE);
 	ASSERT_PTR_NE(cp, NULL);
 	ASSERT_STRING_EQ(cp, (const char *)sshbuf_ptr(buf));
 	sshbuf_free(buf);
 	free(cp);
 	TEST_DONE();
 
 	sshkey_free(k1);
 #endif /* ENABLE_SK */
 
 	sshbuf_free(pw);
 
 }
diff --git a/regress/unittests/sshkey/test_fuzz.c b/regress/unittests/sshkey/test_fuzz.c
index 2fae19dcfe08..0aff7c9bf4e4 100644
--- a/regress/unittests/sshkey/test_fuzz.c
+++ b/regress/unittests/sshkey/test_fuzz.c
@@ -1,391 +1,397 @@
-/* 	$OpenBSD: test_fuzz.c,v 1.13 2021/12/14 21:25:27 deraadt Exp $ */
+/* 	$OpenBSD: test_fuzz.c,v 1.14 2024/01/11 01:45:58 djm Exp $ */
 /*
  * Fuzz tests for key parsing
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
 #include <openssl/objects.h>
 #ifdef OPENSSL_HAS_NISTP256
 # include <openssl/ec.h>
 #endif
 #endif
 
 #include "../test_helper/test_helper.h"
 
 #include "ssherr.h"
 #include "authfile.h"
 #include "sshkey.h"
 #include "sshbuf.h"
 
 #include "common.h"
 
 void sshkey_fuzz_tests(void);
 
 static void
 onerror(void *fuzz)
 {
 	fprintf(stderr, "Failed during fuzz:\n");
 	fuzz_dump((struct fuzz *)fuzz);
 }
 
 static void
 public_fuzz(struct sshkey *k)
 {
 	struct sshkey *k1;
 	struct sshbuf *buf;
 	struct fuzz *fuzz;
 	u_int fuzzers = FUZZ_1_BIT_FLIP | FUZZ_1_BYTE_FLIP |
 	    FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END;
 
 	if (test_is_fast())
 		fuzzers &= ~FUZZ_1_BIT_FLIP;
 	if (test_is_slow())
 		fuzzers |= FUZZ_2_BIT_FLIP | FUZZ_2_BYTE_FLIP;
 	ASSERT_PTR_NE(buf = sshbuf_new(), NULL);
 	ASSERT_INT_EQ(sshkey_putb(k, buf), 0);
 	fuzz = fuzz_begin(fuzzers, sshbuf_mutable_ptr(buf), sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_from_blob(sshbuf_ptr(buf), sshbuf_len(buf),
 	    &k1), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	TEST_ONERROR(onerror, fuzz);
 	for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
 		if (sshkey_from_blob(fuzz_ptr(fuzz), fuzz_len(fuzz), &k1) == 0)
 			sshkey_free(k1);
 	}
 	fuzz_cleanup(fuzz);
 }
 
 static void
 sig_fuzz(struct sshkey *k, const char *sig_alg)
 {
 	struct fuzz *fuzz;
 	u_char *sig, c[] = "some junk to be signed";
 	size_t l;
 	u_int fuzzers = FUZZ_1_BIT_FLIP | FUZZ_1_BYTE_FLIP | FUZZ_2_BYTE_FLIP |
 	    FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END;
 
 	if (test_is_fast())
 		fuzzers &= ~FUZZ_2_BYTE_FLIP;
 	if (test_is_slow())
 		fuzzers |= FUZZ_2_BIT_FLIP;
 
 	ASSERT_INT_EQ(sshkey_sign(k, &sig, &l, c, sizeof(c),
 	    sig_alg, NULL, NULL, 0), 0);
 	ASSERT_SIZE_T_GT(l, 0);
 	fuzz = fuzz_begin(fuzzers, sig, l);
 	ASSERT_INT_EQ(sshkey_verify(k, sig, l, c, sizeof(c), NULL, 0, NULL), 0);
 	free(sig);
 	TEST_ONERROR(onerror, fuzz);
 	for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
 		/* Ensure 1-bit difference at least */
 		if (fuzz_matches_original(fuzz))
 			continue;
 		ASSERT_INT_NE(sshkey_verify(k, fuzz_ptr(fuzz), fuzz_len(fuzz),
 		    c, sizeof(c), NULL, 0, NULL), 0);
 	}
 	fuzz_cleanup(fuzz);
 }
 
 #define NUM_FAST_BASE64_TESTS	1024
 
 void
 sshkey_fuzz_tests(void)
 {
 	struct sshkey *k1;
 	struct sshbuf *buf, *fuzzed;
 	struct fuzz *fuzz;
 	int r, i;
 
 #ifdef WITH_OPENSSL
 	TEST_START("fuzz RSA private");
 	buf = load_file("rsa_1");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 
 	TEST_START("fuzz RSA new-format private");
 	buf = load_file("rsa_n");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("fuzz DSA private");
 	buf = load_file("dsa_1");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 
 	TEST_START("fuzz DSA new-format private");
 	buf = load_file("dsa_n");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("fuzz ECDSA private");
 	buf = load_file("ecdsa_1");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 
 	TEST_START("fuzz ECDSA new-format private");
 	buf = load_file("ecdsa_n");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("fuzz Ed25519 private");
 	buf = load_file("ed25519_1");
 	fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
 	    sshbuf_len(buf));
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshkey_free(k1);
 	sshbuf_free(buf);
 	ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
 	TEST_ONERROR(onerror, fuzz);
 	for(i = 0; !fuzz_done(fuzz); i++, fuzz_next(fuzz)) {
 		r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
 		ASSERT_INT_EQ(r, 0);
 		if (sshkey_parse_private_fileblob(fuzzed, "", &k1, NULL) == 0)
 			sshkey_free(k1);
 		sshbuf_reset(fuzzed);
 		if (test_is_fast() && i >= NUM_FAST_BASE64_TESTS)
 			break;
 	}
 	sshbuf_free(fuzzed);
 	fuzz_cleanup(fuzz);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("fuzz RSA public");
 	buf = load_file("rsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz RSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1"), &k1), 0);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("fuzz DSA public");
 	buf = load_file("dsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz DSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("dsa_1"), &k1), 0);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("fuzz ECDSA public");
 	buf = load_file("ecdsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz ECDSA cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ecdsa_1"), &k1), 0);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("fuzz Ed25519 public");
 	buf = load_file("ed25519_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz Ed25519 cert");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ed25519_1"), &k1), 0);
 	public_fuzz(k1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("fuzz RSA sig");
 	buf = load_file("rsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, "ssh-rsa");
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz RSA SHA256 sig");
 	buf = load_file("rsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, "rsa-sha2-256");
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("fuzz RSA SHA512 sig");
 	buf = load_file("rsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, "rsa-sha2-512");
 	sshkey_free(k1);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("fuzz DSA sig");
 	buf = load_file("dsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("fuzz ECDSA sig");
 	buf = load_file("ecdsa_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("fuzz Ed25519 sig");
 	buf = load_file("ed25519_1");
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
 	sshbuf_free(buf);
 	sig_fuzz(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 
 /* XXX fuzz decoded new-format blobs too */
 /* XXX fuzz XMSS too */
 
 }
diff --git a/regress/unittests/sshkey/test_sshkey.c b/regress/unittests/sshkey/test_sshkey.c
index cc359aea5063..c1cbb1128238 100644
--- a/regress/unittests/sshkey/test_sshkey.c
+++ b/regress/unittests/sshkey/test_sshkey.c
@@ -1,528 +1,535 @@
-/* 	$OpenBSD: test_sshkey.c,v 1.23 2023/01/04 22:48:57 tb Exp $ */
+/* 	$OpenBSD: test_sshkey.c,v 1.24 2024/01/11 01:45:58 djm Exp $ */
 /*
  * Regress test for sshkey.h key management API
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
 #if defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256)
 # include <openssl/ec.h>
 #endif
 #endif
 
 #include "../test_helper/test_helper.h"
 
 #include "ssherr.h"
 #include "sshbuf.h"
 #define SSHBUF_INTERNAL 1	/* access internals for testing */
 #include "sshkey.h"
 
 #include "authfile.h"
 #include "common.h"
 #include "ssh2.h"
 
 void sshkey_tests(void);
 
 static void
 put_opt(struct sshbuf *b, const char *name, const char *value)
 {
 	struct sshbuf *sect;
 
 	sect = sshbuf_new();
 	ASSERT_PTR_NE(sect, NULL);
 	ASSERT_INT_EQ(sshbuf_put_cstring(b, name), 0);
 	if (value != NULL)
 		ASSERT_INT_EQ(sshbuf_put_cstring(sect, value), 0);
 	ASSERT_INT_EQ(sshbuf_put_stringb(b, sect), 0);
 	sshbuf_free(sect);
 }
 
 #ifdef WITH_OPENSSL
 static void
 build_cert(struct sshbuf *b, struct sshkey *k, const char *type,
     struct sshkey *sign_key, struct sshkey *ca_key,
     const char *sig_alg)
 {
 	struct sshbuf *ca_buf, *pk, *principals, *critopts, *exts;
 	u_char *sigblob;
 	size_t siglen;
 
 	ca_buf = sshbuf_new();
 	ASSERT_PTR_NE(ca_buf, NULL);
 	ASSERT_INT_EQ(sshkey_putb(ca_key, ca_buf), 0);
 
 	/*
 	 * Get the public key serialisation by rendering the key and skipping
 	 * the type string. This is a bit of a hack :/
 	 */
 	pk = sshbuf_new();
 	ASSERT_PTR_NE(pk, NULL);
 	ASSERT_INT_EQ(sshkey_putb_plain(k, pk), 0);
 	ASSERT_INT_EQ(sshbuf_skip_string(pk), 0);
 
 	principals = sshbuf_new();
 	ASSERT_PTR_NE(principals, NULL);
 	ASSERT_INT_EQ(sshbuf_put_cstring(principals, "gsamsa"), 0);
 	ASSERT_INT_EQ(sshbuf_put_cstring(principals, "gregor"), 0);
 
 	critopts = sshbuf_new();
 	ASSERT_PTR_NE(critopts, NULL);
 	put_opt(critopts, "force-command", "/usr/local/bin/nethack");
 	put_opt(critopts, "source-address", "192.168.0.0/24,127.0.0.1,::1");
 
 	exts = sshbuf_new();
 	ASSERT_PTR_NE(exts, NULL);
 	put_opt(critopts, "permit-X11-forwarding", NULL);
 
 	ASSERT_INT_EQ(sshbuf_put_cstring(b, type), 0);
 	ASSERT_INT_EQ(sshbuf_put_cstring(b, "noncenoncenonce!"), 0); /* nonce */
 	ASSERT_INT_EQ(sshbuf_putb(b, pk), 0); /* public key serialisation */
 	ASSERT_INT_EQ(sshbuf_put_u64(b, 1234), 0); /* serial */
 	ASSERT_INT_EQ(sshbuf_put_u32(b, SSH2_CERT_TYPE_USER), 0); /* type */
 	ASSERT_INT_EQ(sshbuf_put_cstring(b, "gregor"), 0); /* key ID */
 	ASSERT_INT_EQ(sshbuf_put_stringb(b, principals), 0); /* principals */
 	ASSERT_INT_EQ(sshbuf_put_u64(b, 0), 0); /* start */
 	ASSERT_INT_EQ(sshbuf_put_u64(b, 0xffffffffffffffffULL), 0); /* end */
 	ASSERT_INT_EQ(sshbuf_put_stringb(b, critopts), 0); /* options */
 	ASSERT_INT_EQ(sshbuf_put_stringb(b, exts), 0); /* extensions */
 	ASSERT_INT_EQ(sshbuf_put_string(b, NULL, 0), 0); /* reserved */
 	ASSERT_INT_EQ(sshbuf_put_stringb(b, ca_buf), 0); /* signature key */
 	ASSERT_INT_EQ(sshkey_sign(sign_key, &sigblob, &siglen,
 	    sshbuf_ptr(b), sshbuf_len(b), sig_alg, NULL, NULL, 0), 0);
 	ASSERT_INT_EQ(sshbuf_put_string(b, sigblob, siglen), 0); /* signature */
 
 	free(sigblob);
 	sshbuf_free(ca_buf);
 	sshbuf_free(exts);
 	sshbuf_free(critopts);
 	sshbuf_free(principals);
 	sshbuf_free(pk);
 }
 #endif /* WITH_OPENSSL */
 
 static void
 signature_test(struct sshkey *k, struct sshkey *bad, const char *sig_alg,
     const u_char *d, size_t l)
 {
 	size_t len;
 	u_char *sig;
 
 	ASSERT_INT_EQ(sshkey_sign(k, &sig, &len, d, l, sig_alg,
 	    NULL, NULL, 0), 0);
 	ASSERT_SIZE_T_GT(len, 8);
 	ASSERT_PTR_NE(sig, NULL);
 	ASSERT_INT_EQ(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
 	ASSERT_INT_NE(sshkey_verify(bad, sig, len, d, l, NULL, 0, NULL), 0);
 	/* Fuzz test is more comprehensive, this is just a smoke test */
 	sig[len - 5] ^= 0x10;
 	ASSERT_INT_NE(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
 	free(sig);
 }
 
 static void
 banana(u_char *s, size_t l)
 {
 	size_t o;
 	const u_char the_banana[] = { 'b', 'a', 'n', 'a', 'n', 'a' };
 
 	for (o = 0; o < l; o += sizeof(the_banana)) {
 		if (l - o < sizeof(the_banana)) {
 			memcpy(s + o, "nanananana", l - o);
 			break;
 		}
 		memcpy(s + o, the_banana, sizeof(the_banana));
 	}
 }
 
 static void
 signature_tests(struct sshkey *k, struct sshkey *bad, const char *sig_alg)
 {
 	u_char i, buf[2049];
 	size_t lens[] = {
 		1, 2, 7, 8, 9, 15, 16, 17, 31, 32, 33, 127, 128, 129,
 		255, 256, 257, 1023, 1024, 1025, 2047, 2048, 2049
 	};
 
 	for (i = 0; i < (sizeof(lens)/sizeof(lens[0])); i++) {
 		test_subtest_info("%s key, banana length %zu",
 		    sshkey_type(k), lens[i]);
 		banana(buf, lens[i]);
 		signature_test(k, bad, sig_alg, buf, lens[i]);
 	}
 }
 
 static struct sshkey *
 get_private(const char *n)
 {
 	struct sshbuf *b;
 	struct sshkey *ret;
 
 	b = load_file(n);
 	ASSERT_INT_EQ(sshkey_parse_private_fileblob(b, "", &ret, NULL), 0);
 	sshbuf_free(b);
 	return ret;
 }
 
 void
 sshkey_tests(void)
 {
-	struct sshkey *k1, *k2, *k3, *kf;
+	struct sshkey *k1 = NULL, *k2 = NULL, *k3 = NULL, *kf = NULL;
 #ifdef WITH_OPENSSL
-	struct sshkey *k4, *kr, *kd;
+	struct sshkey *k4 = NULL, *kr = NULL, *kd = NULL;
 #ifdef OPENSSL_HAS_ECC
-	struct sshkey *ke;
+	struct sshkey *ke = NULL;
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
-	struct sshbuf *b;
+	struct sshbuf *b = NULL;
 
 	TEST_START("new invalid");
 	k1 = sshkey_new(-42);
 	ASSERT_PTR_EQ(k1, NULL);
 	TEST_DONE();
 
 	TEST_START("new/free KEY_UNSPEC");
 	k1 = sshkey_new(KEY_UNSPEC);
 	ASSERT_PTR_NE(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("new/free KEY_RSA");
 	k1 = sshkey_new(KEY_RSA);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(k1->rsa, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("new/free KEY_DSA");
 	k1 = sshkey_new(KEY_DSA);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(k1->dsa, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("new/free KEY_ECDSA");
 	k1 = sshkey_new(KEY_ECDSA);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_EQ(k1->ecdsa, NULL);  /* Can't allocate without NID */
 	sshkey_free(k1);
 	TEST_DONE();
 #endif
 
 	TEST_START("new/free KEY_ED25519");
 	k1 = sshkey_new(KEY_ED25519);
 	ASSERT_PTR_NE(k1, NULL);
 	/* These should be blank until key loaded or generated */
 	ASSERT_PTR_EQ(k1->ed25519_sk, NULL);
 	ASSERT_PTR_EQ(k1->ed25519_pk, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 
 	TEST_START("generate KEY_RSA too small modulus");
 	ASSERT_INT_EQ(sshkey_generate(KEY_RSA, 128, &k1),
 	    SSH_ERR_KEY_LENGTH);
 	ASSERT_PTR_EQ(k1, NULL);
 	TEST_DONE();
 
 	TEST_START("generate KEY_RSA too large modulus");
 	ASSERT_INT_EQ(sshkey_generate(KEY_RSA, 1 << 20, &k1),
 	    SSH_ERR_KEY_LENGTH);
 	ASSERT_PTR_EQ(k1, NULL);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("generate KEY_DSA wrong bits");
 	ASSERT_INT_EQ(sshkey_generate(KEY_DSA, 2048, &k1),
 	    SSH_ERR_KEY_LENGTH);
 	ASSERT_PTR_EQ(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("generate KEY_ECDSA wrong bits");
 	ASSERT_INT_EQ(sshkey_generate(KEY_ECDSA, 42, &k1),
 	    SSH_ERR_KEY_LENGTH);
 	ASSERT_PTR_EQ(k1, NULL);
 	sshkey_free(k1);
 	TEST_DONE();
 #endif
 
 	TEST_START("generate KEY_RSA");
 	ASSERT_INT_EQ(sshkey_generate(KEY_RSA, 767, &kr),
 	    SSH_ERR_KEY_LENGTH);
 	ASSERT_INT_EQ(sshkey_generate(KEY_RSA, 1024, &kr), 0);
 	ASSERT_PTR_NE(kr, NULL);
 	ASSERT_PTR_NE(kr->rsa, NULL);
 	ASSERT_PTR_NE(rsa_n(kr), NULL);
 	ASSERT_PTR_NE(rsa_e(kr), NULL);
 	ASSERT_PTR_NE(rsa_p(kr), NULL);
 	ASSERT_INT_EQ(BN_num_bits(rsa_n(kr)), 1024);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("generate KEY_DSA");
 	ASSERT_INT_EQ(sshkey_generate(KEY_DSA, 1024, &kd), 0);
 	ASSERT_PTR_NE(kd, NULL);
 	ASSERT_PTR_NE(kd->dsa, NULL);
 	ASSERT_PTR_NE(dsa_g(kd), NULL);
 	ASSERT_PTR_NE(dsa_priv_key(kd), NULL);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("generate KEY_ECDSA");
 	ASSERT_INT_EQ(sshkey_generate(KEY_ECDSA, 256, &ke), 0);
 	ASSERT_PTR_NE(ke, NULL);
 	ASSERT_PTR_NE(ke->ecdsa, NULL);
 	ASSERT_PTR_NE(EC_KEY_get0_public_key(ke->ecdsa), NULL);
 	ASSERT_PTR_NE(EC_KEY_get0_private_key(ke->ecdsa), NULL);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("generate KEY_ED25519");
 	ASSERT_INT_EQ(sshkey_generate(KEY_ED25519, 256, &kf), 0);
 	ASSERT_PTR_NE(kf, NULL);
 	ASSERT_INT_EQ(kf->type, KEY_ED25519);
 	ASSERT_PTR_NE(kf->ed25519_pk, NULL);
 	ASSERT_PTR_NE(kf->ed25519_sk, NULL);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("demote KEY_RSA");
 	ASSERT_INT_EQ(sshkey_from_private(kr, &k1), 0);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(kr, k1);
 	ASSERT_INT_EQ(k1->type, KEY_RSA);
 	ASSERT_PTR_NE(k1->rsa, NULL);
 	ASSERT_PTR_NE(rsa_n(k1), NULL);
 	ASSERT_PTR_NE(rsa_e(k1), NULL);
 	ASSERT_PTR_EQ(rsa_p(k1), NULL);
 	TEST_DONE();
 
 	TEST_START("equal KEY_RSA/demoted KEY_RSA");
 	ASSERT_INT_EQ(sshkey_equal(kr, k1), 1);
 	sshkey_free(k1);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("demote KEY_DSA");
 	ASSERT_INT_EQ(sshkey_from_private(kd, &k1), 0);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(kd, k1);
 	ASSERT_INT_EQ(k1->type, KEY_DSA);
 	ASSERT_PTR_NE(k1->dsa, NULL);
 	ASSERT_PTR_NE(dsa_g(k1), NULL);
 	ASSERT_PTR_EQ(dsa_priv_key(k1), NULL);
 	TEST_DONE();
 
 	TEST_START("equal KEY_DSA/demoted KEY_DSA");
 	ASSERT_INT_EQ(sshkey_equal(kd, k1), 1);
 	sshkey_free(k1);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("demote KEY_ECDSA");
 	ASSERT_INT_EQ(sshkey_from_private(ke, &k1), 0);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(ke, k1);
 	ASSERT_INT_EQ(k1->type, KEY_ECDSA);
 	ASSERT_PTR_NE(k1->ecdsa, NULL);
 	ASSERT_INT_EQ(k1->ecdsa_nid, ke->ecdsa_nid);
 	ASSERT_PTR_NE(EC_KEY_get0_public_key(ke->ecdsa), NULL);
 	ASSERT_PTR_EQ(EC_KEY_get0_private_key(k1->ecdsa), NULL);
 	TEST_DONE();
 
 	TEST_START("equal KEY_ECDSA/demoted KEY_ECDSA");
 	ASSERT_INT_EQ(sshkey_equal(ke, k1), 1);
 	sshkey_free(k1);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("demote KEY_ED25519");
 	ASSERT_INT_EQ(sshkey_from_private(kf, &k1), 0);
 	ASSERT_PTR_NE(k1, NULL);
 	ASSERT_PTR_NE(kf, k1);
 	ASSERT_INT_EQ(k1->type, KEY_ED25519);
 	ASSERT_PTR_NE(k1->ed25519_pk, NULL);
 	ASSERT_PTR_EQ(k1->ed25519_sk, NULL);
 	TEST_DONE();
 
 	TEST_START("equal KEY_ED25519/demoted KEY_ED25519");
 	ASSERT_INT_EQ(sshkey_equal(kf, k1), 1);
 	sshkey_free(k1);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("equal mismatched key types");
 	ASSERT_INT_EQ(sshkey_equal(kd, kr), 0);
 #ifdef OPENSSL_HAS_ECC
 	ASSERT_INT_EQ(sshkey_equal(kd, ke), 0);
 	ASSERT_INT_EQ(sshkey_equal(kr, ke), 0);
 	ASSERT_INT_EQ(sshkey_equal(ke, kf), 0);
 #endif /* OPENSSL_HAS_ECC */
 	ASSERT_INT_EQ(sshkey_equal(kd, kf), 0);
 	TEST_DONE();
 #endif /* WITH_OPENSSL */
 
 	TEST_START("equal different keys");
 #ifdef WITH_OPENSSL
 	ASSERT_INT_EQ(sshkey_generate(KEY_RSA, 1024, &k1), 0);
 	ASSERT_INT_EQ(sshkey_equal(kr, k1), 0);
 	sshkey_free(k1);
-	ASSERT_INT_EQ(sshkey_generate(KEY_DSA, 1024, &k1), 0);
-	ASSERT_INT_EQ(sshkey_equal(kd, k1), 0);
-	sshkey_free(k1);
 #ifdef OPENSSL_HAS_ECC
 	ASSERT_INT_EQ(sshkey_generate(KEY_ECDSA, 256, &k1), 0);
 	ASSERT_INT_EQ(sshkey_equal(ke, k1), 0);
 	sshkey_free(k1);
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 	ASSERT_INT_EQ(sshkey_generate(KEY_ED25519, 256, &k1), 0);
 	ASSERT_INT_EQ(sshkey_equal(kf, k1), 0);
 	sshkey_free(k1);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	sshkey_free(kr);
 	sshkey_free(kd);
 #ifdef OPENSSL_HAS_ECC
 	sshkey_free(ke);
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 	sshkey_free(kf);
 
 	TEST_START("certify key");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ed25519_1.pub"),
 	    &k1, NULL), 0);
 	k2 = get_private("ed25519_2");
 	ASSERT_INT_EQ(sshkey_to_certified(k1), 0);
 	ASSERT_PTR_NE(k1->cert, NULL);
 	k1->cert->type = SSH2_CERT_TYPE_USER;
 	k1->cert->serial = 1234;
 	k1->cert->key_id = strdup("estragon");
 	ASSERT_PTR_NE(k1->cert->key_id, NULL);
 	k1->cert->principals = calloc(4, sizeof(*k1->cert->principals));
 	ASSERT_PTR_NE(k1->cert->principals, NULL);
 	k1->cert->principals[0] = strdup("estragon");
 	k1->cert->principals[1] = strdup("vladimir");
 	k1->cert->principals[2] = strdup("pozzo");
 	k1->cert->principals[3] = strdup("lucky");
 	ASSERT_PTR_NE(k1->cert->principals[0], NULL);
 	ASSERT_PTR_NE(k1->cert->principals[1], NULL);
 	ASSERT_PTR_NE(k1->cert->principals[2], NULL);
 	ASSERT_PTR_NE(k1->cert->principals[3], NULL);
 	k1->cert->nprincipals = 4;
 	k1->cert->valid_after = 0;
 	k1->cert->valid_before = (u_int64_t)-1;
 	sshbuf_free(k1->cert->critical);
 	k1->cert->critical = sshbuf_new();
 	ASSERT_PTR_NE(k1->cert->critical, NULL);
 	sshbuf_free(k1->cert->extensions);
 	k1->cert->extensions = sshbuf_new();
 	ASSERT_PTR_NE(k1->cert->extensions, NULL);
 	put_opt(k1->cert->critical, "force-command", "/usr/bin/true");
 	put_opt(k1->cert->critical, "source-address", "127.0.0.1");
 	put_opt(k1->cert->extensions, "permit-X11-forwarding", NULL);
 	put_opt(k1->cert->extensions, "permit-agent-forwarding", NULL);
 	ASSERT_INT_EQ(sshkey_from_private(k2, &k1->cert->signature_key), 0);
 	ASSERT_INT_EQ(sshkey_certify(k1, k2, NULL, NULL, NULL), 0);
 	b = sshbuf_new();
 	ASSERT_PTR_NE(b, NULL);
 	ASSERT_INT_EQ(sshkey_putb(k1, b), 0);
 	ASSERT_INT_EQ(sshkey_from_blob(sshbuf_ptr(b), sshbuf_len(b), &k3), 0);
 
 	sshkey_free(k1);
 	sshkey_free(k2);
 	sshkey_free(k3);
 	sshbuf_reset(b);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("sign and verify RSA");
 	k1 = get_private("rsa_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, "ssh-rsa");
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("sign and verify RSA-SHA256");
 	k1 = get_private("rsa_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, "rsa-sha2-256");
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 	TEST_START("sign and verify RSA-SHA512");
 	k1 = get_private("rsa_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, "rsa-sha2-512");
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("sign and verify DSA");
 	k1 = get_private("dsa_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("dsa_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, NULL);
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("sign and verify ECDSA");
 	k1 = get_private("ecdsa_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ecdsa_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, NULL);
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 	TEST_START("sign and verify ED25519");
 	k1 = get_private("ed25519_1");
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("ed25519_2.pub"), &k2,
 	    NULL), 0);
 	signature_tests(k1, k2, NULL);
 	sshkey_free(k1);
 	sshkey_free(k2);
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("nested certificate");
 	ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1"), &k1), 0);
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_1.pub"), &k2,
 	    NULL), 0);
 	k3 = get_private("rsa_1");
 	build_cert(b, k2, "ssh-rsa-cert-v01@openssh.com", k3, k1, NULL);
 	ASSERT_INT_EQ(sshkey_from_blob(sshbuf_ptr(b), sshbuf_len(b), &k4),
 	    SSH_ERR_KEY_CERT_INVALID_SIGN_KEY);
 	ASSERT_PTR_EQ(k4, NULL);
 	sshkey_free(k1);
 	sshkey_free(k2);
 	sshkey_free(k3);
 	sshbuf_free(b);
 	TEST_DONE();
 #endif /* WITH_OPENSSL */
 }
diff --git a/regress/unittests/sshsig/tests.c b/regress/unittests/sshsig/tests.c
index 13cfcfde210d..80966bdd2c27 100644
--- a/regress/unittests/sshsig/tests.c
+++ b/regress/unittests/sshsig/tests.c
@@ -1,142 +1,144 @@
-/* 	$OpenBSD: tests.c,v 1.3 2021/12/14 21:25:27 deraadt Exp $ */
+/* 	$OpenBSD: tests.c,v 1.4 2024/01/11 01:45:59 djm Exp $ */
 /*
  * Regress test for sshbuf.h buffer API
  *
  * Placed in the public domain
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <stdio.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include <openssl/crypto.h>
 #endif
 
 #include "ssherr.h"
 #include "authfile.h"
 #include "sshkey.h"
 #include "sshbuf.h"
 #include "sshsig.h"
 #include "log.h"
 
 #include "../test_helper/test_helper.h"
 
 static struct sshbuf *
 load_file(const char *name)
 {
 	struct sshbuf *ret = NULL;
 
 	ASSERT_INT_EQ(sshbuf_load_file(test_data_file(name), &ret), 0);
 	ASSERT_PTR_NE(ret, NULL);
 	return ret;
 }
 
 static struct sshkey *
 load_key(const char *name)
 {
 	struct sshkey *ret = NULL;
 	ASSERT_INT_EQ(sshkey_load_public(test_data_file(name), &ret, NULL), 0);
 	ASSERT_PTR_NE(ret, NULL);
 	return ret;
 }
 
 static void
 check_sig(const char *keyname, const char *signame, const struct sshbuf *msg,
     const char *namespace)
 {
 	struct sshkey *k, *sign_key;
 	struct sshbuf *sig, *rawsig;
 	struct sshkey_sig_details *sig_details;
 
 	k = load_key(keyname);
 	sig = load_file(signame);
 	sign_key = NULL;
 	sig_details = NULL;
 	rawsig = NULL;
 	ASSERT_INT_EQ(sshsig_dearmor(sig, &rawsig), 0);
 	ASSERT_INT_EQ(sshsig_verifyb(rawsig, msg, namespace,
 	    &sign_key, &sig_details), 0);
 	ASSERT_INT_EQ(sshkey_equal(k, sign_key), 1);
 	sshkey_free(k);
 	sshkey_free(sign_key);
 	sshkey_sig_details_free(sig_details);
 	sshbuf_free(sig);
 	sshbuf_free(rawsig);
 }
 
 void
 tests(void)
 {
 	struct sshbuf *msg;
 	char *namespace;
 
 #if 0
         log_init("test_sshsig", SYSLOG_LEVEL_DEBUG3, SYSLOG_FACILITY_AUTH, 1);
 #endif
 
 #ifdef WITH_OPENSSL
 	OpenSSL_add_all_algorithms();
 	ERR_load_crypto_strings();
 #endif
 
 	TEST_START("load data");
 	msg = load_file("namespace");
 	namespace = sshbuf_dup_string(msg);
 	ASSERT_PTR_NE(namespace, NULL);
 	sshbuf_free(msg);
 	msg = load_file("signed-data");
 	TEST_DONE();
 
 #ifdef WITH_OPENSSL
 	TEST_START("check RSA signature");
 	check_sig("rsa.pub", "rsa.sig", msg, namespace);
 	TEST_DONE();
 
+#ifdef WITH_DSA
 	TEST_START("check DSA signature");
 	check_sig("dsa.pub", "dsa.sig", msg, namespace);
 	TEST_DONE();
+#endif
 
 #ifdef OPENSSL_HAS_ECC
 	TEST_START("check ECDSA signature");
 	check_sig("ecdsa.pub", "ecdsa.sig", msg, namespace);
 	TEST_DONE();
 #endif
 #endif
 
 	TEST_START("check ED25519 signature");
 	check_sig("ed25519.pub", "ed25519.sig", msg, namespace);
 	TEST_DONE();
 
 #ifdef ENABLE_SK
 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
 	TEST_START("check ECDSA-SK signature");
 	check_sig("ecdsa_sk.pub", "ecdsa_sk.sig", msg, namespace);
 	TEST_DONE();
 #endif
 
 	TEST_START("check ED25519-SK signature");
 	check_sig("ed25519_sk.pub", "ed25519_sk.sig", msg, namespace);
 	TEST_DONE();
 
 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
 	TEST_START("check ECDSA-SK webauthn signature");
 	check_sig("ecdsa_sk_webauthn.pub", "ecdsa_sk_webauthn.sig",
 	    msg, namespace);
  	TEST_DONE();
 #endif
 #endif /* ENABLE_SK */
 
 	sshbuf_free(msg);
 	free(namespace);
 }
diff --git a/scp.0 b/scp.0
index 8153dbc45cd5..e098ddf55fce 100644
--- a/scp.0
+++ b/scp.0
@@ -1,232 +1,232 @@
 SCP(1)                      General Commands Manual                     SCP(1)
 
 NAME
      scp M-bM-^@M-^S OpenSSH secure file copy
 
 SYNOPSIS
      scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]
          [-i identity_file] [-J destination] [-l limit] [-o ssh_option]
          [-P port] [-S program] [-X sftp_option] source ... target
 
 DESCRIPTION
      scp copies files between hosts on a network.
 
      scp uses the SFTP protocol over a ssh(1) connection for data transfer,
      and uses the same authentication and provides the same security as a
      login session.
 
      scp will ask for passwords or passphrases if they are needed for
      authentication.
 
      The source and target may be specified as a local pathname, a remote host
      with optional path in the form [user@]host:[path], or a URI in the form
      scp://[user@]host[:port][/path].  Local file names can be made explicit
      using absolute or relative pathnames to avoid scp treating file names
      containing M-bM-^@M-^X:M-bM-^@M-^Y as host specifiers.
 
      When copying between two remote hosts, if the URI format is used, a port
      cannot be specified on the target if the -R option is used.
 
      The options are as follows:
 
      -3      Copies between two remote hosts are transferred through the local
              host.  Without this option the data is copied directly between
              the two remote hosts.  Note that, when using the legacy SCP
              protocol (via the -O flag), this option selects batch mode for
              the second host as scp cannot ask for passwords or passphrases
              for both hosts.  This mode is the default.
 
      -4      Forces scp to use IPv4 addresses only.
 
      -6      Forces scp to use IPv6 addresses only.
 
      -A      Allows forwarding of ssh-agent(1) to the remote system.  The
              default is not to forward an authentication agent.
 
      -B      Selects batch mode (prevents asking for passwords or
              passphrases).
 
      -C      Compression enable.  Passes the -C flag to ssh(1) to enable
              compression.
 
      -c cipher
              Selects the cipher to use for encrypting the data transfer.  This
              option is directly passed to ssh(1).
 
      -D sftp_server_path
              Connect directly to a local SFTP server program rather than a
              remote one via ssh(1).  This option may be useful in debugging
              the client and server.
 
      -F ssh_config
              Specifies an alternative per-user configuration file for ssh.
              This option is directly passed to ssh(1).
 
      -i identity_file
              Selects the file from which the identity (private key) for public
              key authentication is read.  This option is directly passed to
              ssh(1).
 
      -J destination
              Connect to the target host by first making an scp connection to
              the jump host described by destination and then establishing a
              TCP forwarding to the ultimate destination from there.  Multiple
              jump hops may be specified separated by comma characters.  This
              is a shortcut to specify a ProxyJump configuration directive.
              This option is directly passed to ssh(1).
 
      -l limit
              Limits the used bandwidth, specified in Kbit/s.
 
      -O      Use the legacy SCP protocol for file transfers instead of the
              SFTP protocol.  Forcing the use of the SCP protocol may be
              necessary for servers that do not implement SFTP, for backwards-
              compatibility for particular filename wildcard patterns and for
              expanding paths with a M-bM-^@M-^X~M-bM-^@M-^Y prefix for older SFTP servers.
 
      -o ssh_option
              Can be used to pass options to ssh in the format used in
              ssh_config(5).  This is useful for specifying options for which
              there is no separate scp command-line flag.  For full details of
              the options listed below, and their possible values, see
              ssh_config(5).
 
                    AddressFamily
                    BatchMode
                    BindAddress
                    BindInterface
                    CanonicalDomains
                    CanonicalizeFallbackLocal
                    CanonicalizeHostname
                    CanonicalizeMaxDots
                    CanonicalizePermittedCNAMEs
                    CASignatureAlgorithms
                    CertificateFile
                    CheckHostIP
                    Ciphers
                    Compression
                    ConnectionAttempts
                    ConnectTimeout
                    ControlMaster
                    ControlPath
                    ControlPersist
                    GlobalKnownHostsFile
                    GSSAPIAuthentication
                    GSSAPIDelegateCredentials
                    HashKnownHosts
                    Host
                    HostbasedAcceptedAlgorithms
                    HostbasedAuthentication
                    HostKeyAlgorithms
                    HostKeyAlias
                    Hostname
                    IdentitiesOnly
                    IdentityAgent
                    IdentityFile
                    IPQoS
                    KbdInteractiveAuthentication
                    KbdInteractiveDevices
                    KexAlgorithms
                    KnownHostsCommand
                    LogLevel
                    MACs
                    NoHostAuthenticationForLocalhost
                    NumberOfPasswordPrompts
                    PasswordAuthentication
                    PKCS11Provider
                    Port
                    PreferredAuthentications
                    ProxyCommand
                    ProxyJump
                    PubkeyAcceptedAlgorithms
                    PubkeyAuthentication
                    RekeyLimit
                    RequiredRSASize
                    SendEnv
                    ServerAliveInterval
                    ServerAliveCountMax
                    SetEnv
                    StrictHostKeyChecking
                    TCPKeepAlive
                    UpdateHostKeys
                    User
                    UserKnownHostsFile
                    VerifyHostKeyDNS
 
      -P port
              Specifies the port to connect to on the remote host.  Note that
              this option is written with a capital M-bM-^@M-^XPM-bM-^@M-^Y, because -p is already
              reserved for preserving the times and mode bits of the file.
 
      -p      Preserves modification times, access times, and file mode bits
              from the source file.
 
      -q      Quiet mode: disables the progress meter as well as warning and
              diagnostic messages from ssh(1).
 
      -R      Copies between two remote hosts are performed by connecting to
              the origin host and executing scp there.  This requires that scp
              running on the origin host can authenticate to the destination
              host without requiring a password.
 
      -r      Recursively copy entire directories.  Note that scp follows
              symbolic links encountered in the tree traversal.
 
      -S program
              Name of program to use for the encrypted connection.  The program
              must understand ssh(1) options.
 
      -T      Disable strict filename checking.  By default when copying files
              from a remote host to a local directory scp checks that the
              received filenames match those requested on the command-line to
              prevent the remote end from sending unexpected or unwanted files.
              Because of differences in how various operating systems and
              shells interpret filename wildcards, these checks may cause
              wanted files to be rejected.  This option disables these checks
              at the expense of fully trusting that the server will not send
              unexpected filenames.
 
      -v      Verbose mode.  Causes scp and ssh(1) to print debugging messages
              about their progress.  This is helpful in debugging connection,
              authentication, and configuration problems.
 
      -X sftp_option
              Specify an option that controls aspects of SFTP protocol
              behaviour.  The valid options are:
 
              nrequests=value
                      Controls how many concurrent SFTP read or write requests
                      may be in progress at any point in time during a download
                      or upload.  By default 64 requests may be active
                      concurrently.
 
              buffer=value
                      Controls the maximum buffer size for a single SFTP
                      read/write operation used during download or upload.  By
                      default a 32KB buffer is used.
 
 EXIT STATUS
      The scp utility exitsM-BM- 0 on success, andM-BM- >0 if an error occurs.
 
 SEE ALSO
      sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1), ssh_config(5),
      sftp-server(8), sshd(8)
 
 HISTORY
      scp is based on the rcp program in BSD source code from the Regents of
      the University of California.
 
      Since OpenSSH 9.0, scp has used the SFTP protocol for transfers by
      default.
 
 AUTHORS
      Timo Rinne <tri@iki.fi>
      Tatu Ylonen <ylo@cs.hut.fi>
 
 CAVEATS
      The legacy SCP protocol (selected by the -O flag) requires execution of
      the remote user's shell to perform glob(3) pattern matching.  This
      requires careful quoting of any characters that have special meaning to
      the remote shell, such as quote characters.
 
-OpenBSD 7.3                    December 16, 2022                   OpenBSD 7.3
+OpenBSD 7.5                    December 16, 2022                   OpenBSD 7.5
diff --git a/servconf.c b/servconf.c
index 86c2979360c5..4b434909ab2f 100644
--- a/servconf.c
+++ b/servconf.c
@@ -1,3203 +1,3257 @@
-/* $OpenBSD: servconf.c,v 1.403 2023/10/11 22:42:26 djm Exp $ */
+/* $OpenBSD: servconf.c,v 1.405 2024/03/04 02:16:11 djm Exp $ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #ifdef __OpenBSD__
 #include <sys/sysctl.h>
 #endif
 
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #ifdef HAVE_NET_ROUTE_H
 #include <net/route.h>
 #endif
 
 #include <ctype.h>
 #include <netdb.h>
 #include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <signal.h>
 #include <unistd.h>
 #include <limits.h>
 #include <stdarg.h>
 #include <errno.h>
 #ifdef HAVE_UTIL_H
 #include <util.h>
 #endif
 #ifdef USE_SYSTEM_GLOB
 # include <glob.h>
 #else
 # include "openbsd-compat/glob.h"
 #endif
 
 #include "openbsd-compat/sys-queue.h"
 #include "xmalloc.h"
 #include "ssh.h"
 #include "log.h"
 #include "sshbuf.h"
 #include "misc.h"
 #include "servconf.h"
 #include "pathnames.h"
 #include "cipher.h"
 #include "sshkey.h"
 #include "kex.h"
 #include "mac.h"
 #include "match.h"
 #include "channels.h"
 #include "groupaccess.h"
 #include "canohost.h"
 #include "packet.h"
 #include "ssherr.h"
 #include "hostfile.h"
 #include "auth.h"
 #include "myproposal.h"
 #include "digest.h"
 
 static void add_listen_addr(ServerOptions *, const char *,
     const char *, int);
 static void add_one_listen_addr(ServerOptions *, const char *,
     const char *, int);
 static void parse_server_config_depth(ServerOptions *options,
     const char *filename, struct sshbuf *conf, struct include_list *includes,
     struct connection_info *connectinfo, int flags, int *activep, int depth);
 
 /* Use of privilege separation or not */
 extern int use_privsep;
 extern struct sshbuf *cfg;
 
 /* Initializes the server options to their default values. */
 
 void
 initialize_server_options(ServerOptions *options)
 {
 	memset(options, 0, sizeof(*options));
 
 	/* Portable-specific options */
 	options->use_pam = -1;
 
 	/* Standard Options */
 	options->num_ports = 0;
 	options->ports_from_cmdline = 0;
 	options->queued_listen_addrs = NULL;
 	options->num_queued_listens = 0;
 	options->listen_addrs = NULL;
 	options->num_listen_addrs = 0;
 	options->address_family = -1;
 	options->routing_domain = NULL;
 	options->num_host_key_files = 0;
 	options->num_host_cert_files = 0;
 	options->host_key_agent = NULL;
 	options->pid_file = NULL;
 	options->login_grace_time = -1;
 	options->permit_root_login = PERMIT_NOT_SET;
 	options->ignore_rhosts = -1;
 	options->ignore_user_known_hosts = -1;
 	options->print_motd = -1;
 	options->print_lastlog = -1;
 	options->x11_forwarding = -1;
 	options->x11_display_offset = -1;
 	options->x11_use_localhost = -1;
 	options->permit_tty = -1;
 	options->permit_user_rc = -1;
 	options->xauth_location = NULL;
 	options->strict_modes = -1;
 	options->tcp_keep_alive = -1;
 	options->log_facility = SYSLOG_FACILITY_NOT_SET;
 	options->log_level = SYSLOG_LEVEL_NOT_SET;
 	options->num_log_verbose = 0;
 	options->log_verbose = NULL;
 	options->hostbased_authentication = -1;
 	options->hostbased_uses_name_from_packet_only = -1;
 	options->hostbased_accepted_algos = NULL;
 	options->hostkeyalgorithms = NULL;
 	options->pubkey_authentication = -1;
 	options->pubkey_auth_options = -1;
 	options->pubkey_accepted_algos = NULL;
 	options->kerberos_authentication = -1;
 	options->kerberos_or_local_passwd = -1;
 	options->kerberos_ticket_cleanup = -1;
 	options->kerberos_get_afs_token = -1;
 	options->gss_authentication=-1;
 	options->gss_cleanup_creds = -1;
 	options->gss_strict_acceptor = -1;
 	options->password_authentication = -1;
 	options->kbd_interactive_authentication = -1;
 	options->permit_empty_passwd = -1;
 	options->permit_user_env = -1;
 	options->permit_user_env_allowlist = NULL;
 	options->compression = -1;
 	options->rekey_limit = -1;
 	options->rekey_interval = -1;
 	options->allow_tcp_forwarding = -1;
 	options->allow_streamlocal_forwarding = -1;
 	options->allow_agent_forwarding = -1;
 	options->num_allow_users = 0;
 	options->num_deny_users = 0;
 	options->num_allow_groups = 0;
 	options->num_deny_groups = 0;
 	options->ciphers = NULL;
 	options->macs = NULL;
 	options->kex_algorithms = NULL;
 	options->ca_sign_algorithms = NULL;
 	options->fwd_opts.gateway_ports = -1;
 	options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
 	options->fwd_opts.streamlocal_bind_unlink = -1;
 	options->num_subsystems = 0;
 	options->max_startups_begin = -1;
 	options->max_startups_rate = -1;
 	options->max_startups = -1;
 	options->per_source_max_startups = -1;
 	options->per_source_masklen_ipv4 = -1;
 	options->per_source_masklen_ipv6 = -1;
 	options->max_authtries = -1;
 	options->max_sessions = -1;
 	options->banner = NULL;
 	options->use_dns = -1;
 	options->client_alive_interval = -1;
 	options->client_alive_count_max = -1;
 	options->num_authkeys_files = 0;
 	options->num_accept_env = 0;
 	options->num_setenv = 0;
 	options->permit_tun = -1;
 	options->permitted_opens = NULL;
 	options->permitted_listens = NULL;
 	options->adm_forced_command = NULL;
 	options->chroot_directory = NULL;
 	options->authorized_keys_command = NULL;
 	options->authorized_keys_command_user = NULL;
 	options->revoked_keys_file = NULL;
 	options->sk_provider = NULL;
 	options->trusted_user_ca_keys = NULL;
 	options->authorized_principals_file = NULL;
 	options->authorized_principals_command = NULL;
 	options->authorized_principals_command_user = NULL;
 	options->ip_qos_interactive = -1;
 	options->ip_qos_bulk = -1;
 	options->version_addendum = NULL;
 	options->fingerprint_hash = -1;
 	options->disable_forwarding = -1;
 	options->expose_userauth_info = -1;
 	options->required_rsa_size = -1;
 	options->channel_timeouts = NULL;
 	options->num_channel_timeouts = 0;
 	options->unused_connection_timeout = -1;
 }
 
 /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
 static int
 option_clear_or_none(const char *o)
 {
 	return o == NULL || strcasecmp(o, "none") == 0;
 }
 
 static void
 assemble_algorithms(ServerOptions *o)
 {
 	char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
 	char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
 	int r;
 
 	all_cipher = cipher_alg_list(',', 0);
 	all_mac = mac_alg_list(',');
 	all_kex = kex_alg_list(',');
 	all_key = sshkey_alg_list(0, 0, 1, ',');
 	all_sig = sshkey_alg_list(0, 1, 1, ',');
 	/* remove unsupported algos from default lists */
 	def_cipher = match_filter_allowlist(KEX_SERVER_ENCRYPT, all_cipher);
 	def_mac = match_filter_allowlist(KEX_SERVER_MAC, all_mac);
 	def_kex = match_filter_allowlist(KEX_SERVER_KEX, all_kex);
 	def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
 	def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
 #define ASSEMBLE(what, defaults, all) \
 	do { \
 		if ((r = kex_assemble_names(&o->what, defaults, all)) != 0) \
 			fatal_fr(r, "%s", #what); \
 	} while (0)
 	ASSEMBLE(ciphers, def_cipher, all_cipher);
 	ASSEMBLE(macs, def_mac, all_mac);
 	ASSEMBLE(kex_algorithms, def_kex, all_kex);
 	ASSEMBLE(hostkeyalgorithms, def_key, all_key);
 	ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
 	ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
 	ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
 #undef ASSEMBLE
 	free(all_cipher);
 	free(all_mac);
 	free(all_kex);
 	free(all_key);
 	free(all_sig);
 	free(def_cipher);
 	free(def_mac);
 	free(def_kex);
 	free(def_key);
 	free(def_sig);
 }
 
 void
 servconf_add_hostkey(const char *file, const int line,
     ServerOptions *options, const char *path, int userprovided)
 {
 	char *apath = derelativise_path(path);
 
 	opt_array_append2(file, line, "HostKey",
 	    &options->host_key_files, &options->host_key_file_userprovided,
 	    &options->num_host_key_files, apath, userprovided);
 	free(apath);
 }
 
 void
 servconf_add_hostcert(const char *file, const int line,
     ServerOptions *options, const char *path)
 {
 	char *apath = derelativise_path(path);
 
 	opt_array_append(file, line, "HostCertificate",
 	    &options->host_cert_files, &options->num_host_cert_files, apath);
 	free(apath);
 }
 
 void
 fill_default_server_options(ServerOptions *options)
 {
 	u_int i;
 
 	/* Portable-specific options */
 	if (options->use_pam == -1)
 		options->use_pam = 0;
 
 	/* Standard Options */
 	if (options->num_host_key_files == 0) {
 		/* fill default hostkeys for protocols */
 		servconf_add_hostkey("[default]", 0, options,
 		    _PATH_HOST_RSA_KEY_FILE, 0);
 #ifdef OPENSSL_HAS_ECC
 		servconf_add_hostkey("[default]", 0, options,
 		    _PATH_HOST_ECDSA_KEY_FILE, 0);
 #endif
 		servconf_add_hostkey("[default]", 0, options,
 		    _PATH_HOST_ED25519_KEY_FILE, 0);
 #ifdef WITH_XMSS
 		servconf_add_hostkey("[default]", 0, options,
 		    _PATH_HOST_XMSS_KEY_FILE, 0);
 #endif /* WITH_XMSS */
 	}
 	/* No certificates by default */
 	if (options->num_ports == 0)
 		options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
 	if (options->address_family == -1)
 		options->address_family = AF_UNSPEC;
 	if (options->listen_addrs == NULL)
 		add_listen_addr(options, NULL, NULL, 0);
 	if (options->pid_file == NULL)
 		options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE);
 	if (options->moduli_file == NULL)
 		options->moduli_file = xstrdup(_PATH_DH_MODULI);
 	if (options->login_grace_time == -1)
 		options->login_grace_time = 120;
 	if (options->permit_root_login == PERMIT_NOT_SET)
 		options->permit_root_login = PERMIT_NO_PASSWD;
 	if (options->ignore_rhosts == -1)
 		options->ignore_rhosts = 1;
 	if (options->ignore_user_known_hosts == -1)
 		options->ignore_user_known_hosts = 0;
 	if (options->print_motd == -1)
 		options->print_motd = 1;
 	if (options->print_lastlog == -1)
 		options->print_lastlog = 1;
 	if (options->x11_forwarding == -1)
 		options->x11_forwarding = 0;
 	if (options->x11_display_offset == -1)
 		options->x11_display_offset = 10;
 	if (options->x11_use_localhost == -1)
 		options->x11_use_localhost = 1;
 	if (options->xauth_location == NULL)
 		options->xauth_location = xstrdup(_PATH_XAUTH);
 	if (options->permit_tty == -1)
 		options->permit_tty = 1;
 	if (options->permit_user_rc == -1)
 		options->permit_user_rc = 1;
 	if (options->strict_modes == -1)
 		options->strict_modes = 1;
 	if (options->tcp_keep_alive == -1)
 		options->tcp_keep_alive = 1;
 	if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
 		options->log_facility = SYSLOG_FACILITY_AUTH;
 	if (options->log_level == SYSLOG_LEVEL_NOT_SET)
 		options->log_level = SYSLOG_LEVEL_INFO;
 	if (options->hostbased_authentication == -1)
 		options->hostbased_authentication = 0;
 	if (options->hostbased_uses_name_from_packet_only == -1)
 		options->hostbased_uses_name_from_packet_only = 0;
 	if (options->pubkey_authentication == -1)
 		options->pubkey_authentication = 1;
 	if (options->pubkey_auth_options == -1)
 		options->pubkey_auth_options = 0;
 	if (options->kerberos_authentication == -1)
 		options->kerberos_authentication = 0;
 	if (options->kerberos_or_local_passwd == -1)
 		options->kerberos_or_local_passwd = 1;
 	if (options->kerberos_ticket_cleanup == -1)
 		options->kerberos_ticket_cleanup = 1;
 	if (options->kerberos_get_afs_token == -1)
 		options->kerberos_get_afs_token = 0;
 	if (options->gss_authentication == -1)
 		options->gss_authentication = 0;
 	if (options->gss_cleanup_creds == -1)
 		options->gss_cleanup_creds = 1;
 	if (options->gss_strict_acceptor == -1)
 		options->gss_strict_acceptor = 1;
 	if (options->password_authentication == -1)
 		options->password_authentication = 1;
 	if (options->kbd_interactive_authentication == -1)
 		options->kbd_interactive_authentication = 1;
 	if (options->permit_empty_passwd == -1)
 		options->permit_empty_passwd = 0;
 	if (options->permit_user_env == -1) {
 		options->permit_user_env = 0;
 		options->permit_user_env_allowlist = NULL;
 	}
 	if (options->compression == -1)
 #ifdef WITH_ZLIB
 		options->compression = COMP_DELAYED;
 #else
 		options->compression = COMP_NONE;
 #endif
 
 	if (options->rekey_limit == -1)
 		options->rekey_limit = 0;
 	if (options->rekey_interval == -1)
 		options->rekey_interval = 0;
 	if (options->allow_tcp_forwarding == -1)
 		options->allow_tcp_forwarding = FORWARD_ALLOW;
 	if (options->allow_streamlocal_forwarding == -1)
 		options->allow_streamlocal_forwarding = FORWARD_ALLOW;
 	if (options->allow_agent_forwarding == -1)
 		options->allow_agent_forwarding = 1;
 	if (options->fwd_opts.gateway_ports == -1)
 		options->fwd_opts.gateway_ports = 0;
 	if (options->max_startups == -1)
 		options->max_startups = 100;
 	if (options->max_startups_rate == -1)
 		options->max_startups_rate = 30;		/* 30% */
 	if (options->max_startups_begin == -1)
 		options->max_startups_begin = 10;
 	if (options->per_source_max_startups == -1)
 		options->per_source_max_startups = INT_MAX;
 	if (options->per_source_masklen_ipv4 == -1)
 		options->per_source_masklen_ipv4 = 32;
 	if (options->per_source_masklen_ipv6 == -1)
 		options->per_source_masklen_ipv6 = 128;
 	if (options->max_authtries == -1)
 		options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
 	if (options->max_sessions == -1)
 		options->max_sessions = DEFAULT_SESSIONS_MAX;
 	if (options->use_dns == -1)
 		options->use_dns = 0;
 	if (options->client_alive_interval == -1)
 		options->client_alive_interval = 0;
 	if (options->client_alive_count_max == -1)
 		options->client_alive_count_max = 3;
 	if (options->num_authkeys_files == 0) {
 		opt_array_append("[default]", 0, "AuthorizedKeysFiles",
 		    &options->authorized_keys_files,
 		    &options->num_authkeys_files,
 		    _PATH_SSH_USER_PERMITTED_KEYS);
 		opt_array_append("[default]", 0, "AuthorizedKeysFiles",
 		    &options->authorized_keys_files,
 		    &options->num_authkeys_files,
 		    _PATH_SSH_USER_PERMITTED_KEYS2);
 	}
 	if (options->permit_tun == -1)
 		options->permit_tun = SSH_TUNMODE_NO;
 	if (options->ip_qos_interactive == -1)
 		options->ip_qos_interactive = IPTOS_DSCP_AF21;
 	if (options->ip_qos_bulk == -1)
 		options->ip_qos_bulk = IPTOS_DSCP_CS1;
 	if (options->version_addendum == NULL)
 		options->version_addendum = xstrdup("");
 	if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
 		options->fwd_opts.streamlocal_bind_mask = 0177;
 	if (options->fwd_opts.streamlocal_bind_unlink == -1)
 		options->fwd_opts.streamlocal_bind_unlink = 0;
 	if (options->fingerprint_hash == -1)
 		options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
 	if (options->disable_forwarding == -1)
 		options->disable_forwarding = 0;
 	if (options->expose_userauth_info == -1)
 		options->expose_userauth_info = 0;
 	if (options->sk_provider == NULL)
 		options->sk_provider = xstrdup("internal");
 	if (options->required_rsa_size == -1)
 		options->required_rsa_size = SSH_RSA_MINIMUM_MODULUS_SIZE;
 	if (options->unused_connection_timeout == -1)
 		options->unused_connection_timeout = 0;
 
 	assemble_algorithms(options);
 
 	/* Turn privilege separation and sandboxing on by default */
 	if (use_privsep == -1)
 		use_privsep = PRIVSEP_ON;
 
 #define CLEAR_ON_NONE(v) \
 	do { \
 		if (option_clear_or_none(v)) { \
 			free(v); \
 			v = NULL; \
 		} \
 	} while(0)
 #define CLEAR_ON_NONE_ARRAY(v, nv, none) \
 	do { \
 		if (options->nv == 1 && \
 		    strcasecmp(options->v[0], none) == 0) { \
 			free(options->v[0]); \
 			free(options->v); \
 			options->v = NULL; \
 			options->nv = 0; \
 		} \
 	} while (0)
 	CLEAR_ON_NONE(options->pid_file);
 	CLEAR_ON_NONE(options->xauth_location);
 	CLEAR_ON_NONE(options->banner);
 	CLEAR_ON_NONE(options->trusted_user_ca_keys);
 	CLEAR_ON_NONE(options->revoked_keys_file);
 	CLEAR_ON_NONE(options->sk_provider);
 	CLEAR_ON_NONE(options->authorized_principals_file);
 	CLEAR_ON_NONE(options->adm_forced_command);
 	CLEAR_ON_NONE(options->chroot_directory);
 	CLEAR_ON_NONE(options->routing_domain);
 	CLEAR_ON_NONE(options->host_key_agent);
 
 	for (i = 0; i < options->num_host_key_files; i++)
 		CLEAR_ON_NONE(options->host_key_files[i]);
 	for (i = 0; i < options->num_host_cert_files; i++)
 		CLEAR_ON_NONE(options->host_cert_files[i]);
 
 	CLEAR_ON_NONE_ARRAY(channel_timeouts, num_channel_timeouts, "none");
 	CLEAR_ON_NONE_ARRAY(auth_methods, num_auth_methods, "any");
 #undef CLEAR_ON_NONE
 #undef CLEAR_ON_NONE_ARRAY
 }
 
 /* Keyword tokens. */
 typedef enum {
 	sBadOption,		/* == unknown option */
 	/* Portable-specific options */
 	sUsePAM,
 	/* Standard Options */
 	sPort, sHostKeyFile, sLoginGraceTime,
 	sPermitRootLogin, sLogFacility, sLogLevel, sLogVerbose,
 	sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
 	sKerberosGetAFSToken, sPasswordAuthentication,
 	sKbdInteractiveAuthentication, sListenAddress, sAddressFamily,
 	sPrintMotd, sPrintLastLog, sIgnoreRhosts,
 	sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
 	sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
 	sPermitUserEnvironment, sAllowTcpForwarding, sCompression,
 	sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
 	sIgnoreUserKnownHosts, sCiphers, sMacs, sPidFile, sModuliFile,
 	sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedAlgorithms,
 	sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions,
 	sBanner, sUseDNS, sHostbasedAuthentication,
 	sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedAlgorithms,
 	sHostKeyAlgorithms, sPerSourceMaxStartups, sPerSourceNetBlockSize,
 	sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
 	sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
 	sAcceptEnv, sSetEnv, sPermitTunnel,
 	sMatch, sPermitOpen, sPermitListen, sForceCommand, sChrootDirectory,
 	sUsePrivilegeSeparation, sAllowAgentForwarding,
 	sHostCertificate, sInclude,
 	sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
 	sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
 	sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
 	sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
 	sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
 	sStreamLocalBindMask, sStreamLocalBindUnlink,
 	sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding,
 	sExposeAuthInfo, sRDomain, sPubkeyAuthOptions, sSecurityKeyProvider,
 	sRequiredRSASize, sChannelTimeout, sUnusedConnectionTimeout,
 	sDeprecated, sIgnore, sUnsupported
 } ServerOpCodes;
 
 #define SSHCFG_GLOBAL		0x01	/* allowed in main section of config */
 #define SSHCFG_MATCH		0x02	/* allowed inside a Match section */
 #define SSHCFG_ALL		(SSHCFG_GLOBAL|SSHCFG_MATCH)
 #define SSHCFG_NEVERMATCH	0x04  /* Match never matches; internal only */
 #define SSHCFG_MATCH_ONLY	0x08  /* Match only in conditional blocks; internal only */
 
 /* Textual representation of the tokens. */
 static struct {
 	const char *name;
 	ServerOpCodes opcode;
 	u_int flags;
 } keywords[] = {
 	/* Portable-specific options */
 #ifdef USE_PAM
 	{ "usepam", sUsePAM, SSHCFG_GLOBAL },
 #else
 	{ "usepam", sUnsupported, SSHCFG_GLOBAL },
 #endif
 	{ "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL },
 	/* Standard Options */
 	{ "port", sPort, SSHCFG_GLOBAL },
 	{ "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
 	{ "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL },		/* alias */
 	{ "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL },
 	{ "pidfile", sPidFile, SSHCFG_GLOBAL },
 	{ "modulifile", sModuliFile, SSHCFG_GLOBAL },
 	{ "serverkeybits", sDeprecated, SSHCFG_GLOBAL },
 	{ "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
 	{ "keyregenerationinterval", sDeprecated, SSHCFG_GLOBAL },
 	{ "permitrootlogin", sPermitRootLogin, SSHCFG_ALL },
 	{ "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
 	{ "loglevel", sLogLevel, SSHCFG_ALL },
 	{ "logverbose", sLogVerbose, SSHCFG_ALL },
 	{ "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
 	{ "rhostsrsaauthentication", sDeprecated, SSHCFG_ALL },
 	{ "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL },
 	{ "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL },
 	{ "hostbasedacceptedalgorithms", sHostbasedAcceptedAlgorithms, SSHCFG_ALL },
 	{ "hostbasedacceptedkeytypes", sHostbasedAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
 	{ "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL },
 	{ "rsaauthentication", sDeprecated, SSHCFG_ALL },
 	{ "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL },
 	{ "pubkeyacceptedalgorithms", sPubkeyAcceptedAlgorithms, SSHCFG_ALL },
 	{ "pubkeyacceptedkeytypes", sPubkeyAcceptedAlgorithms, SSHCFG_ALL }, /* obsolete */
 	{ "pubkeyauthoptions", sPubkeyAuthOptions, SSHCFG_ALL },
 	{ "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
 #ifdef KRB5
 	{ "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL },
 	{ "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
 	{ "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
 #ifdef USE_AFS
 	{ "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
 #else
 	{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
 #endif
 #else
 	{ "kerberosauthentication", sUnsupported, SSHCFG_ALL },
 	{ "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
 	{ "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
 	{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
 #endif
 	{ "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
 	{ "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
 #ifdef GSSAPI
 	{ "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
 	{ "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
 	{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
 #else
 	{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
 	{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
 	{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
 #endif
 	{ "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
 	{ "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
 	{ "challengeresponseauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
 	{ "skeyauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, /* alias */
 	{ "checkmail", sDeprecated, SSHCFG_GLOBAL },
 	{ "listenaddress", sListenAddress, SSHCFG_GLOBAL },
 	{ "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
 	{ "printmotd", sPrintMotd, SSHCFG_GLOBAL },
 #ifdef DISABLE_LASTLOG
 	{ "printlastlog", sUnsupported, SSHCFG_GLOBAL },
 #else
 	{ "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
 #endif
 	{ "ignorerhosts", sIgnoreRhosts, SSHCFG_ALL },
 	{ "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
 	{ "x11forwarding", sX11Forwarding, SSHCFG_ALL },
 	{ "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
 	{ "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
 	{ "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
 	{ "strictmodes", sStrictModes, SSHCFG_GLOBAL },
 	{ "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL },
 	{ "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
 	{ "uselogin", sDeprecated, SSHCFG_GLOBAL },
 	{ "compression", sCompression, SSHCFG_GLOBAL },
 	{ "rekeylimit", sRekeyLimit, SSHCFG_ALL },
 	{ "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
 	{ "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL },	/* obsolete alias */
 	{ "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
 	{ "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL },
 	{ "allowusers", sAllowUsers, SSHCFG_ALL },
 	{ "denyusers", sDenyUsers, SSHCFG_ALL },
 	{ "allowgroups", sAllowGroups, SSHCFG_ALL },
 	{ "denygroups", sDenyGroups, SSHCFG_ALL },
 	{ "ciphers", sCiphers, SSHCFG_GLOBAL },
 	{ "macs", sMacs, SSHCFG_GLOBAL },
 	{ "protocol", sIgnore, SSHCFG_GLOBAL },
 	{ "gatewayports", sGatewayPorts, SSHCFG_ALL },
 	{ "subsystem", sSubsystem, SSHCFG_ALL },
 	{ "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
 	{ "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
 	{ "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
 	{ "maxauthtries", sMaxAuthTries, SSHCFG_ALL },
 	{ "maxsessions", sMaxSessions, SSHCFG_ALL },
 	{ "banner", sBanner, SSHCFG_ALL },
 	{ "usedns", sUseDNS, SSHCFG_GLOBAL },
 	{ "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
 	{ "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
 	{ "clientaliveinterval", sClientAliveInterval, SSHCFG_ALL },
 	{ "clientalivecountmax", sClientAliveCountMax, SSHCFG_ALL },
 	{ "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL },
 	{ "authorizedkeysfile2", sDeprecated, SSHCFG_ALL },
 	{ "useprivilegeseparation", sDeprecated, SSHCFG_GLOBAL},
 	{ "acceptenv", sAcceptEnv, SSHCFG_ALL },
 	{ "setenv", sSetEnv, SSHCFG_ALL },
 	{ "permittunnel", sPermitTunnel, SSHCFG_ALL },
 	{ "permittty", sPermitTTY, SSHCFG_ALL },
 	{ "permituserrc", sPermitUserRC, SSHCFG_ALL },
 	{ "match", sMatch, SSHCFG_ALL },
 	{ "permitopen", sPermitOpen, SSHCFG_ALL },
 	{ "permitlisten", sPermitListen, SSHCFG_ALL },
 	{ "forcecommand", sForceCommand, SSHCFG_ALL },
 	{ "chrootdirectory", sChrootDirectory, SSHCFG_ALL },
 	{ "hostcertificate", sHostCertificate, SSHCFG_GLOBAL },
 	{ "revokedkeys", sRevokedKeys, SSHCFG_ALL },
 	{ "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
 	{ "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
 	{ "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
 	{ "include", sInclude, SSHCFG_ALL },
 	{ "ipqos", sIPQoS, SSHCFG_ALL },
 	{ "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL },
 	{ "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL },
 	{ "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL },
 	{ "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL },
 	{ "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
 	{ "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL },
 	{ "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL },
 	{ "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
 	{ "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
 	{ "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
 	{ "disableforwarding", sDisableForwarding, SSHCFG_ALL },
 	{ "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL },
 	{ "rdomain", sRDomain, SSHCFG_ALL },
 	{ "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL },
 	{ "securitykeyprovider", sSecurityKeyProvider, SSHCFG_GLOBAL },
 	{ "requiredrsasize", sRequiredRSASize, SSHCFG_ALL },
 	{ "channeltimeout", sChannelTimeout, SSHCFG_ALL },
 	{ "unusedconnectiontimeout", sUnusedConnectionTimeout, SSHCFG_ALL },
 	{ NULL, sBadOption, 0 }
 };
 
 static struct {
 	int val;
 	char *text;
 } tunmode_desc[] = {
 	{ SSH_TUNMODE_NO, "no" },
 	{ SSH_TUNMODE_POINTOPOINT, "point-to-point" },
 	{ SSH_TUNMODE_ETHERNET, "ethernet" },
 	{ SSH_TUNMODE_YES, "yes" },
 	{ -1, NULL }
 };
 
 /* Returns an opcode name from its number */
 
 static const char *
 lookup_opcode_name(ServerOpCodes code)
 {
 	u_int i;
 
 	for (i = 0; keywords[i].name != NULL; i++)
 		if (keywords[i].opcode == code)
 			return(keywords[i].name);
 	return "UNKNOWN";
 }
 
 
 /*
  * Returns the number of the token pointed to by cp or sBadOption.
  */
 
 static ServerOpCodes
 parse_token(const char *cp, const char *filename,
 	    int linenum, u_int *flags)
 {
 	u_int i;
 
 	for (i = 0; keywords[i].name; i++)
 		if (strcasecmp(cp, keywords[i].name) == 0) {
 			*flags = keywords[i].flags;
 			return keywords[i].opcode;
 		}
 
 	error("%s: line %d: Bad configuration option: %s",
 	    filename, linenum, cp);
 	return sBadOption;
 }
 
 char *
 derelativise_path(const char *path)
 {
 	char *expanded, *ret, cwd[PATH_MAX];
 
 	if (strcasecmp(path, "none") == 0)
 		return xstrdup("none");
 	expanded = tilde_expand_filename(path, getuid());
 	if (path_absolute(expanded))
 		return expanded;
 	if (getcwd(cwd, sizeof(cwd)) == NULL)
 		fatal_f("getcwd: %s", strerror(errno));
 	xasprintf(&ret, "%s/%s", cwd, expanded);
 	free(expanded);
 	return ret;
 }
 
 static void
 add_listen_addr(ServerOptions *options, const char *addr,
     const char *rdomain, int port)
 {
 	u_int i;
 
 	if (port > 0)
 		add_one_listen_addr(options, addr, rdomain, port);
 	else {
 		for (i = 0; i < options->num_ports; i++) {
 			add_one_listen_addr(options, addr, rdomain,
 			    options->ports[i]);
 		}
 	}
 }
 
 static void
 add_one_listen_addr(ServerOptions *options, const char *addr,
     const char *rdomain, int port)
 {
 	struct addrinfo hints, *ai, *aitop;
 	char strport[NI_MAXSERV];
 	int gaierr;
 	u_int i;
 
 	/* Find listen_addrs entry for this rdomain */
 	for (i = 0; i < options->num_listen_addrs; i++) {
 		if (rdomain == NULL && options->listen_addrs[i].rdomain == NULL)
 			break;
 		if (rdomain == NULL || options->listen_addrs[i].rdomain == NULL)
 			continue;
 		if (strcmp(rdomain, options->listen_addrs[i].rdomain) == 0)
 			break;
 	}
 	if (i >= options->num_listen_addrs) {
 		/* No entry for this rdomain; allocate one */
 		if (i >= INT_MAX)
 			fatal_f("too many listen addresses");
 		options->listen_addrs = xrecallocarray(options->listen_addrs,
 		    options->num_listen_addrs, options->num_listen_addrs + 1,
 		    sizeof(*options->listen_addrs));
 		i = options->num_listen_addrs++;
 		if (rdomain != NULL)
 			options->listen_addrs[i].rdomain = xstrdup(rdomain);
 	}
 	/* options->listen_addrs[i] points to the addresses for this rdomain */
 
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = options->address_family;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
 	snprintf(strport, sizeof strport, "%d", port);
 	if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
 		fatal("bad addr or host: %s (%s)",
 		    addr ? addr : "<NULL>",
 		    ssh_gai_strerror(gaierr));
 	for (ai = aitop; ai->ai_next; ai = ai->ai_next)
 		;
 	ai->ai_next = options->listen_addrs[i].addrs;
 	options->listen_addrs[i].addrs = aitop;
 }
 
 /* Returns nonzero if the routing domain name is valid */
 static int
 valid_rdomain(const char *name)
 {
 #if defined(HAVE_SYS_VALID_RDOMAIN)
 	return sys_valid_rdomain(name);
 #elif defined(__OpenBSD__)
 	const char *errstr;
 	long long num;
 	struct rt_tableinfo info;
 	int mib[6];
 	size_t miblen = sizeof(mib);
 
 	if (name == NULL)
 		return 1;
 
 	num = strtonum(name, 0, 255, &errstr);
 	if (errstr != NULL)
 		return 0;
 
 	/* Check whether the table actually exists */
 	memset(mib, 0, sizeof(mib));
 	mib[0] = CTL_NET;
 	mib[1] = PF_ROUTE;
 	mib[4] = NET_RT_TABLE;
 	mib[5] = (int)num;
 	if (sysctl(mib, 6, &info, &miblen, NULL, 0) == -1)
 		return 0;
 
 	return 1;
 #else /* defined(__OpenBSD__) */
 	error("Routing domains are not supported on this platform");
 	return 0;
 #endif
 }
 
 /*
  * Queue a ListenAddress to be processed once we have all of the Ports
  * and AddressFamily options.
  */
 static void
 queue_listen_addr(ServerOptions *options, const char *addr,
     const char *rdomain, int port)
 {
 	struct queued_listenaddr *qla;
 
 	options->queued_listen_addrs = xrecallocarray(
 	    options->queued_listen_addrs,
 	    options->num_queued_listens, options->num_queued_listens + 1,
 	    sizeof(*options->queued_listen_addrs));
 	qla = &options->queued_listen_addrs[options->num_queued_listens++];
 	qla->addr = xstrdup(addr);
 	qla->port = port;
 	qla->rdomain = rdomain == NULL ? NULL : xstrdup(rdomain);
 }
 
 /*
  * Process queued (text) ListenAddress entries.
  */
 static void
 process_queued_listen_addrs(ServerOptions *options)
 {
 	u_int i;
 	struct queued_listenaddr *qla;
 
 	if (options->num_ports == 0)
 		options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
 	if (options->address_family == -1)
 		options->address_family = AF_UNSPEC;
 
 	for (i = 0; i < options->num_queued_listens; i++) {
 		qla = &options->queued_listen_addrs[i];
 		add_listen_addr(options, qla->addr, qla->rdomain, qla->port);
 		free(qla->addr);
 		free(qla->rdomain);
 	}
 	free(options->queued_listen_addrs);
 	options->queued_listen_addrs = NULL;
 	options->num_queued_listens = 0;
 }
 
 /*
  * Inform channels layer of permitopen options for a single forwarding
  * direction (local/remote).
  */
 static void
 process_permitopen_list(struct ssh *ssh, ServerOpCodes opcode,
     char **opens, u_int num_opens)
 {
 	u_int i;
 	int port;
 	char *host, *arg, *oarg;
 	int where = opcode == sPermitOpen ? FORWARD_LOCAL : FORWARD_REMOTE;
 	const char *what = lookup_opcode_name(opcode);
 
 	channel_clear_permission(ssh, FORWARD_ADM, where);
 	if (num_opens == 0)
 		return; /* permit any */
 
 	/* handle keywords: "any" / "none" */
 	if (num_opens == 1 && strcmp(opens[0], "any") == 0)
 		return;
 	if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
 		channel_disable_admin(ssh, where);
 		return;
 	}
 	/* Otherwise treat it as a list of permitted host:port */
 	for (i = 0; i < num_opens; i++) {
 		oarg = arg = xstrdup(opens[i]);
 		host = hpdelim(&arg);
 		if (host == NULL)
 			fatal_f("missing host in %s", what);
 		host = cleanhostname(host);
 		if (arg == NULL || ((port = permitopen_port(arg)) < 0))
 			fatal_f("bad port number in %s", what);
 		/* Send it to channels layer */
 		channel_add_permission(ssh, FORWARD_ADM,
 		    where, host, port);
 		free(oarg);
 	}
 }
 
 /*
  * Inform channels layer of permitopen options from configuration.
  */
 void
 process_permitopen(struct ssh *ssh, ServerOptions *options)
 {
 	process_permitopen_list(ssh, sPermitOpen,
 	    options->permitted_opens, options->num_permitted_opens);
 	process_permitopen_list(ssh, sPermitListen,
 	    options->permitted_listens,
 	    options->num_permitted_listens);
 }
 
 void
 process_channel_timeouts(struct ssh *ssh, ServerOptions *options)
 {
 	int secs;
 	u_int i;
 	char *type;
 
 	debug3_f("setting %u timeouts", options->num_channel_timeouts);
 	channel_clear_timeouts(ssh);
 	for (i = 0; i < options->num_channel_timeouts; i++) {
 		if (parse_pattern_interval(options->channel_timeouts[i],
 		    &type, &secs) != 0) {
 			fatal_f("internal error: bad timeout %s",
 			    options->channel_timeouts[i]);
 		}
 		channel_add_timeout(ssh, type, secs);
 		free(type);
 	}
 }
 
 struct connection_info *
 get_connection_info(struct ssh *ssh, int populate, int use_dns)
 {
 	static struct connection_info ci;
 
 	if (ssh == NULL || !populate)
 		return &ci;
 	ci.host = auth_get_canonical_hostname(ssh, use_dns);
 	ci.address = ssh_remote_ipaddr(ssh);
 	ci.laddress = ssh_local_ipaddr(ssh);
 	ci.lport = ssh_local_port(ssh);
 	ci.rdomain = ssh_packet_rdomain_in(ssh);
 	return &ci;
 }
 
 /*
  * The strategy for the Match blocks is that the config file is parsed twice.
  *
  * The first time is at startup.  activep is initialized to 1 and the
  * directives in the global context are processed and acted on.  Hitting a
  * Match directive unsets activep and the directives inside the block are
  * checked for syntax only.
  *
  * The second time is after a connection has been established but before
  * authentication.  activep is initialized to 2 and global config directives
  * are ignored since they have already been processed.  If the criteria in a
  * Match block is met, activep is set and the subsequent directives
  * processed and actioned until EOF or another Match block unsets it.  Any
  * options set are copied into the main server config.
  *
  * Potential additions/improvements:
  *  - Add Match support for pre-kex directives, eg. Ciphers.
  *
  *  - Add a Tag directive (idea from David Leonard) ala pf, eg:
  *	Match Address 192.168.0.*
  *		Tag trusted
  *	Match Group wheel
  *		Tag trusted
  *	Match Tag trusted
  *		AllowTcpForwarding yes
  *		GatewayPorts clientspecified
  *		[...]
  *
  *  - Add a PermittedChannelRequests directive
  *	Match Group shell
  *		PermittedChannelRequests session,forwarded-tcpip
  */
 
 static int
 match_cfg_line_group(const char *grps, int line, const char *user)
 {
 	int result = 0;
 	struct passwd *pw;
 
 	if (user == NULL)
 		goto out;
 
 	if ((pw = getpwnam(user)) == NULL) {
 		debug("Can't match group at line %d because user %.100s does "
 		    "not exist", line, user);
 	} else if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
 		debug("Can't Match group because user %.100s not in any group "
 		    "at line %d", user, line);
 	} else if (ga_match_pattern_list(grps) != 1) {
 		debug("user %.100s does not match group list %.100s at line %d",
 		    user, grps, line);
 	} else {
 		debug("user %.100s matched group list %.100s at line %d", user,
 		    grps, line);
 		result = 1;
 	}
 out:
 	ga_free();
 	return result;
 }
 
 static void
 match_test_missing_fatal(const char *criteria, const char *attrib)
 {
 	fatal("'Match %s' in configuration but '%s' not in connection "
 	    "test specification.", criteria, attrib);
 }
 
 /*
  * All of the attributes on a single Match line are ANDed together, so we need
  * to check every attribute and set the result to zero if any attribute does
  * not match.
  */
 static int
 match_cfg_line(char **condition, int line, struct connection_info *ci)
 {
 	int result = 1, attributes = 0, port;
 	char *arg, *attrib, *cp = *condition;
 
 	if (ci == NULL)
 		debug3("checking syntax for 'Match %s'", cp);
 	else
 		debug3("checking match for '%s' user %s host %s addr %s "
 		    "laddr %s lport %d", cp, ci->user ? ci->user : "(null)",
 		    ci->host ? ci->host : "(null)",
 		    ci->address ? ci->address : "(null)",
 		    ci->laddress ? ci->laddress : "(null)", ci->lport);
 
 	while ((attrib = strdelim(&cp)) && *attrib != '\0') {
 		/* Terminate on comment */
 		if (*attrib == '#') {
 			cp = NULL; /* mark all arguments consumed */
 			break;
 		}
 		arg = NULL;
 		attributes++;
 		/* Criterion "all" has no argument and must appear alone */
 		if (strcasecmp(attrib, "all") == 0) {
 			if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
 			    *arg != '\0' && *arg != '#')) {
 				error("'all' cannot be combined with other "
 				    "Match attributes");
 				return -1;
 			}
 			if (arg != NULL && *arg == '#')
 				cp = NULL; /* mark all arguments consumed */
 			*condition = cp;
 			return 1;
 		}
 		/* All other criteria require an argument */
 		if ((arg = strdelim(&cp)) == NULL ||
 		    *arg == '\0' || *arg == '#') {
 			error("Missing Match criteria for %s", attrib);
 			return -1;
 		}
 		if (strcasecmp(attrib, "user") == 0) {
 			if (ci == NULL || (ci->test && ci->user == NULL)) {
 				result = 0;
 				continue;
 			}
 			if (ci->user == NULL)
 				match_test_missing_fatal("User", "user");
 			if (match_usergroup_pattern_list(ci->user, arg) != 1)
 				result = 0;
 			else
 				debug("user %.100s matched 'User %.100s' at "
 				    "line %d", ci->user, arg, line);
 		} else if (strcasecmp(attrib, "group") == 0) {
 			if (ci == NULL || (ci->test && ci->user == NULL)) {
 				result = 0;
 				continue;
 			}
 			if (ci->user == NULL)
 				match_test_missing_fatal("Group", "user");
 			switch (match_cfg_line_group(arg, line, ci->user)) {
 			case -1:
 				return -1;
 			case 0:
 				result = 0;
 			}
 		} else if (strcasecmp(attrib, "host") == 0) {
 			if (ci == NULL || (ci->test && ci->host == NULL)) {
 				result = 0;
 				continue;
 			}
 			if (ci->host == NULL)
 				match_test_missing_fatal("Host", "host");
 			if (match_hostname(ci->host, arg) != 1)
 				result = 0;
 			else
 				debug("connection from %.100s matched 'Host "
 				    "%.100s' at line %d", ci->host, arg, line);
 		} else if (strcasecmp(attrib, "address") == 0) {
 			if (ci == NULL || (ci->test && ci->address == NULL)) {
 				if (addr_match_list(NULL, arg) != 0)
 					fatal("Invalid Match address argument "
 					    "'%s' at line %d", arg, line);
 				result = 0;
 				continue;
 			}
 			if (ci->address == NULL)
 				match_test_missing_fatal("Address", "addr");
 			switch (addr_match_list(ci->address, arg)) {
 			case 1:
 				debug("connection from %.100s matched 'Address "
 				    "%.100s' at line %d", ci->address, arg, line);
 				break;
 			case 0:
 			case -1:
 				result = 0;
 				break;
 			case -2:
 				return -1;
 			}
 		} else if (strcasecmp(attrib, "localaddress") == 0){
 			if (ci == NULL || (ci->test && ci->laddress == NULL)) {
 				if (addr_match_list(NULL, arg) != 0)
 					fatal("Invalid Match localaddress "
 					    "argument '%s' at line %d", arg,
 					    line);
 				result = 0;
 				continue;
 			}
 			if (ci->laddress == NULL)
 				match_test_missing_fatal("LocalAddress",
 				    "laddr");
 			switch (addr_match_list(ci->laddress, arg)) {
 			case 1:
 				debug("connection from %.100s matched "
 				    "'LocalAddress %.100s' at line %d",
 				    ci->laddress, arg, line);
 				break;
 			case 0:
 			case -1:
 				result = 0;
 				break;
 			case -2:
 				return -1;
 			}
 		} else if (strcasecmp(attrib, "localport") == 0) {
 			if ((port = a2port(arg)) == -1) {
 				error("Invalid LocalPort '%s' on Match line",
 				    arg);
 				return -1;
 			}
 			if (ci == NULL || (ci->test && ci->lport == -1)) {
 				result = 0;
 				continue;
 			}
 			if (ci->lport == 0)
 				match_test_missing_fatal("LocalPort", "lport");
 			/* TODO support port lists */
 			if (port == ci->lport)
 				debug("connection from %.100s matched "
 				    "'LocalPort %d' at line %d",
 				    ci->laddress, port, line);
 			else
 				result = 0;
 		} else if (strcasecmp(attrib, "rdomain") == 0) {
 			if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
 				result = 0;
 				continue;
 			}
 			if (ci->rdomain == NULL)
 				match_test_missing_fatal("RDomain", "rdomain");
 			if (match_pattern_list(ci->rdomain, arg, 0) != 1)
 				result = 0;
 			else
 				debug("user %.100s matched 'RDomain %.100s' at "
 				    "line %d", ci->rdomain, arg, line);
 		} else {
 			error("Unsupported Match attribute %s", attrib);
 			return -1;
 		}
 	}
 	if (attributes == 0) {
 		error("One or more attributes required for Match");
 		return -1;
 	}
 	if (ci != NULL)
 		debug3("match %sfound", result ? "" : "not ");
 	*condition = cp;
 	return result;
 }
 
 #define WHITESPACE " \t\r\n"
 
 /* Multistate option parsing */
 struct multistate {
 	char *key;
 	int value;
 };
 static const struct multistate multistate_flag[] = {
 	{ "yes",			1 },
 	{ "no",				0 },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_ignore_rhosts[] = {
 	{ "yes",			IGNORE_RHOSTS_YES },
 	{ "no",				IGNORE_RHOSTS_NO },
 	{ "shosts-only",		IGNORE_RHOSTS_SHOSTS },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_addressfamily[] = {
 	{ "inet",			AF_INET },
 	{ "inet6",			AF_INET6 },
 	{ "any",			AF_UNSPEC },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_permitrootlogin[] = {
 	{ "without-password",		PERMIT_NO_PASSWD },
 	{ "prohibit-password",		PERMIT_NO_PASSWD },
 	{ "forced-commands-only",	PERMIT_FORCED_ONLY },
 	{ "yes",			PERMIT_YES },
 	{ "no",				PERMIT_NO },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_compression[] = {
 #ifdef WITH_ZLIB
 	{ "yes",			COMP_DELAYED },
 	{ "delayed",			COMP_DELAYED },
 #endif
 	{ "no",				COMP_NONE },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_gatewayports[] = {
 	{ "clientspecified",		2 },
 	{ "yes",			1 },
 	{ "no",				0 },
 	{ NULL, -1 }
 };
 static const struct multistate multistate_tcpfwd[] = {
 	{ "yes",			FORWARD_ALLOW },
 	{ "all",			FORWARD_ALLOW },
 	{ "no",				FORWARD_DENY },
 	{ "remote",			FORWARD_REMOTE },
 	{ "local",			FORWARD_LOCAL },
 	{ NULL, -1 }
 };
 
 static int
 process_server_config_line_depth(ServerOptions *options, char *line,
     const char *filename, int linenum, int *activep,
     struct connection_info *connectinfo, int *inc_flags, int depth,
     struct include_list *includes)
 {
 	char *str, ***chararrayptr, **charptr, *arg, *arg2, *p, *keyword;
-	int cmdline = 0, *intptr, value, value2, n, port, oactive, r, found;
-	int ca_only = 0;
+	int cmdline = 0, *intptr, value, value2, n, port, oactive, r;
+	int ca_only = 0, found = 0;
 	SyslogFacility *log_facility_ptr;
 	LogLevel *log_level_ptr;
 	ServerOpCodes opcode;
-	u_int i, *uintptr, uvalue, flags = 0;
+	u_int i, *uintptr, flags = 0;
 	size_t len;
 	long long val64;
 	const struct multistate *multistate_ptr;
 	const char *errstr;
 	struct include_item *item;
 	glob_t gbuf;
 	char **oav = NULL, **av;
 	int oac = 0, ac;
 	int ret = -1;
+	char **strs = NULL; /* string array arguments; freed implicitly */
+	u_int nstrs = 0;
 
 	/* Strip trailing whitespace. Allow \f (form feed) at EOL only */
 	if ((len = strlen(line)) == 0)
 		return 0;
 	for (len--; len > 0; len--) {
 		if (strchr(WHITESPACE "\f", line[len]) == NULL)
 			break;
 		line[len] = '\0';
 	}
 
 	str = line;
 	if ((keyword = strdelim(&str)) == NULL)
 		return 0;
 	/* Ignore leading whitespace */
 	if (*keyword == '\0')
 		keyword = strdelim(&str);
 	if (!keyword || !*keyword || *keyword == '#')
 		return 0;
 	if (str == NULL || *str == '\0') {
 		error("%s line %d: no argument after keyword \"%s\"",
 		    filename, linenum, keyword);
 		return -1;
 	}
 	intptr = NULL;
 	charptr = NULL;
 	opcode = parse_token(keyword, filename, linenum, &flags);
 
 	if (argv_split(str, &oac, &oav, 1) != 0) {
 		error("%s line %d: invalid quotes", filename, linenum);
 		return -1;
 	}
 	ac = oac;
 	av = oav;
 
 	if (activep == NULL) { /* We are processing a command line directive */
 		cmdline = 1;
 		activep = &cmdline;
 	}
 	if (*activep && opcode != sMatch && opcode != sInclude)
 		debug3("%s:%d setting %s %s", filename, linenum, keyword, str);
 	if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
 		if (connectinfo == NULL) {
 			fatal("%s line %d: Directive '%s' is not allowed "
 			    "within a Match block", filename, linenum, keyword);
 		} else { /* this is a directive we have already processed */
 			ret = 0;
 			goto out;
 		}
 	}
 
 	switch (opcode) {
 	/* Portable-specific options */
 	case sUsePAM:
 		intptr = &options->use_pam;
 		goto parse_flag;
 
 	/* Standard Options */
 	case sBadOption:
 		goto out;
 	case sPort:
 		/* ignore ports from configfile if cmdline specifies ports */
 		if (options->ports_from_cmdline) {
 			argv_consume(&ac);
 			break;
 		}
 		if (options->num_ports >= MAX_PORTS)
 			fatal("%s line %d: too many ports.",
 			    filename, linenum);
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing port number.",
 			    filename, linenum);
 		options->ports[options->num_ports++] = a2port(arg);
 		if (options->ports[options->num_ports-1] <= 0)
 			fatal("%s line %d: Badly formatted port number.",
 			    filename, linenum);
 		break;
 
 	case sLoginGraceTime:
 		intptr = &options->login_grace_time;
  parse_time:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing time value.",
 			    filename, linenum);
 		if ((value = convtime(arg)) == -1)
 			fatal("%s line %d: invalid time value.",
 			    filename, linenum);
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case sListenAddress:
 		arg = argv_next(&ac, &av);
 		if (arg == NULL || *arg == '\0')
 			fatal("%s line %d: missing address",
 			    filename, linenum);
 		/* check for bare IPv6 address: no "[]" and 2 or more ":" */
 		if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
 		    && strchr(p+1, ':') != NULL) {
 			port = 0;
 			p = arg;
 		} else {
 			arg2 = NULL;
 			p = hpdelim(&arg);
 			if (p == NULL)
 				fatal("%s line %d: bad address:port usage",
 				    filename, linenum);
 			p = cleanhostname(p);
 			if (arg == NULL)
 				port = 0;
 			else if ((port = a2port(arg)) <= 0)
 				fatal("%s line %d: bad port number",
 				    filename, linenum);
 		}
 		/* Optional routing table */
 		arg2 = NULL;
 		if ((arg = argv_next(&ac, &av)) != NULL) {
 			if (strcmp(arg, "rdomain") != 0 ||
 			    (arg2 = argv_next(&ac, &av)) == NULL)
 				fatal("%s line %d: bad ListenAddress syntax",
 				    filename, linenum);
 			if (!valid_rdomain(arg2))
 				fatal("%s line %d: bad routing domain",
 				    filename, linenum);
 		}
 		queue_listen_addr(options, p, arg2, port);
 
 		break;
 
 	case sAddressFamily:
 		intptr = &options->address_family;
 		multistate_ptr = multistate_addressfamily;
  parse_multistate:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing argument.",
 			    filename, linenum);
 		value = -1;
 		for (i = 0; multistate_ptr[i].key != NULL; i++) {
 			if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
 				value = multistate_ptr[i].value;
 				break;
 			}
 		}
 		if (value == -1)
 			fatal("%s line %d: unsupported option \"%s\".",
 			    filename, linenum, arg);
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case sHostKeyFile:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing file name.",
 			    filename, linenum);
 		if (*activep) {
 			servconf_add_hostkey(filename, linenum,
 			    options, arg, 1);
 		}
 		break;
 
 	case sHostKeyAgent:
 		charptr = &options->host_key_agent;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing socket name.",
 			    filename, linenum);
 		if (*activep && *charptr == NULL)
 			*charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ?
 			    xstrdup(arg) : derelativise_path(arg);
 		break;
 
 	case sHostCertificate:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing file name.",
 			    filename, linenum);
 		if (*activep)
 			servconf_add_hostcert(filename, linenum, options, arg);
 		break;
 
 	case sPidFile:
 		charptr = &options->pid_file;
  parse_filename:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: missing file name.",
 			    filename, linenum);
 		if (*activep && *charptr == NULL) {
 			*charptr = derelativise_path(arg);
 			/* increase optional counter */
 			if (intptr != NULL)
 				*intptr = *intptr + 1;
 		}
 		break;
 
 	case sModuliFile:
 		charptr = &options->moduli_file;
 		goto parse_filename;
 
 	case sPermitRootLogin:
 		intptr = &options->permit_root_login;
 		multistate_ptr = multistate_permitrootlogin;
 		goto parse_multistate;
 
 	case sIgnoreRhosts:
 		intptr = &options->ignore_rhosts;
 		multistate_ptr = multistate_ignore_rhosts;
 		goto parse_multistate;
 
 	case sIgnoreUserKnownHosts:
 		intptr = &options->ignore_user_known_hosts;
  parse_flag:
 		multistate_ptr = multistate_flag;
 		goto parse_multistate;
 
 	case sHostbasedAuthentication:
 		intptr = &options->hostbased_authentication;
 		goto parse_flag;
 
 	case sHostbasedUsesNameFromPacketOnly:
 		intptr = &options->hostbased_uses_name_from_packet_only;
 		goto parse_flag;
 
 	case sHostbasedAcceptedAlgorithms:
 		charptr = &options->hostbased_accepted_algos;
 		ca_only = 0;
  parse_pubkey_algos:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: Missing argument.",
 			    filename, linenum);
 		if (*arg != '-' &&
 		    !sshkey_names_valid2(*arg == '+' || *arg == '^' ?
 		    arg + 1 : arg, 1, ca_only))
 			fatal("%s line %d: Bad key types '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case sHostKeyAlgorithms:
 		charptr = &options->hostkeyalgorithms;
 		ca_only = 0;
 		goto parse_pubkey_algos;
 
 	case sCASignatureAlgorithms:
 		charptr = &options->ca_sign_algorithms;
 		ca_only = 1;
 		goto parse_pubkey_algos;
 
 	case sPubkeyAuthentication:
 		intptr = &options->pubkey_authentication;
 		ca_only = 0;
 		goto parse_flag;
 
 	case sPubkeyAcceptedAlgorithms:
 		charptr = &options->pubkey_accepted_algos;
 		ca_only = 0;
 		goto parse_pubkey_algos;
 
 	case sPubkeyAuthOptions:
 		intptr = &options->pubkey_auth_options;
 		value = 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (strcasecmp(arg, "none") == 0)
 				continue;
 			if (strcasecmp(arg, "touch-required") == 0)
 				value |= PUBKEYAUTH_TOUCH_REQUIRED;
 			else if (strcasecmp(arg, "verify-required") == 0)
 				value |= PUBKEYAUTH_VERIFY_REQUIRED;
 			else {
 				error("%s line %d: unsupported %s option %s",
 				    filename, linenum, keyword, arg);
 				goto out;
 			}
 		}
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case sKerberosAuthentication:
 		intptr = &options->kerberos_authentication;
 		goto parse_flag;
 
 	case sKerberosOrLocalPasswd:
 		intptr = &options->kerberos_or_local_passwd;
 		goto parse_flag;
 
 	case sKerberosTicketCleanup:
 		intptr = &options->kerberos_ticket_cleanup;
 		goto parse_flag;
 
 	case sKerberosGetAFSToken:
 		intptr = &options->kerberos_get_afs_token;
 		goto parse_flag;
 
 	case sGssAuthentication:
 		intptr = &options->gss_authentication;
 		goto parse_flag;
 
 	case sGssCleanupCreds:
 		intptr = &options->gss_cleanup_creds;
 		goto parse_flag;
 
 	case sGssStrictAcceptor:
 		intptr = &options->gss_strict_acceptor;
 		goto parse_flag;
 
 	case sPasswordAuthentication:
 		intptr = &options->password_authentication;
 		goto parse_flag;
 
 	case sKbdInteractiveAuthentication:
 		intptr = &options->kbd_interactive_authentication;
 		goto parse_flag;
 
 	case sPrintMotd:
 		intptr = &options->print_motd;
 		goto parse_flag;
 
 	case sPrintLastLog:
 		intptr = &options->print_lastlog;
 		goto parse_flag;
 
 	case sX11Forwarding:
 		intptr = &options->x11_forwarding;
 		goto parse_flag;
 
 	case sX11DisplayOffset:
 		intptr = &options->x11_display_offset;
  parse_int:
 		arg = argv_next(&ac, &av);
 		if ((errstr = atoi_err(arg, &value)) != NULL)
 			fatal("%s line %d: %s integer value %s.",
 			    filename, linenum, keyword, errstr);
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case sX11UseLocalhost:
 		intptr = &options->x11_use_localhost;
 		goto parse_flag;
 
 	case sXAuthLocation:
 		charptr = &options->xauth_location;
 		goto parse_filename;
 
 	case sPermitTTY:
 		intptr = &options->permit_tty;
 		goto parse_flag;
 
 	case sPermitUserRC:
 		intptr = &options->permit_user_rc;
 		goto parse_flag;
 
 	case sStrictModes:
 		intptr = &options->strict_modes;
 		goto parse_flag;
 
 	case sTCPKeepAlive:
 		intptr = &options->tcp_keep_alive;
 		goto parse_flag;
 
 	case sEmptyPasswd:
 		intptr = &options->permit_empty_passwd;
 		goto parse_flag;
 
 	case sPermitUserEnvironment:
 		intptr = &options->permit_user_env;
 		charptr = &options->permit_user_env_allowlist;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		value = 0;
 		p = NULL;
 		if (strcmp(arg, "yes") == 0)
 			value = 1;
 		else if (strcmp(arg, "no") == 0)
 			value = 0;
 		else {
 			/* Pattern-list specified */
 			value = 1;
 			p = xstrdup(arg);
 		}
 		if (*activep && *intptr == -1) {
 			*intptr = value;
 			*charptr = p;
 			p = NULL;
 		}
 		free(p);
 		break;
 
 	case sCompression:
 		intptr = &options->compression;
 		multistate_ptr = multistate_compression;
 		goto parse_multistate;
 
 	case sRekeyLimit:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (strcmp(arg, "default") == 0) {
 			val64 = 0;
 		} else {
 			if (scan_scaled(arg, &val64) == -1)
 				fatal("%.200s line %d: Bad %s number '%s': %s",
 				    filename, linenum, keyword,
 				    arg, strerror(errno));
 			if (val64 != 0 && val64 < 16)
 				fatal("%.200s line %d: %s too small",
 				    filename, linenum, keyword);
 		}
 		if (*activep && options->rekey_limit == -1)
 			options->rekey_limit = val64;
 		if (ac != 0) { /* optional rekey interval present */
 			if (strcmp(av[0], "none") == 0) {
 				(void)argv_next(&ac, &av);	/* discard */
 				break;
 			}
 			intptr = &options->rekey_interval;
 			goto parse_time;
 		}
 		break;
 
 	case sGatewayPorts:
 		intptr = &options->fwd_opts.gateway_ports;
 		multistate_ptr = multistate_gatewayports;
 		goto parse_multistate;
 
 	case sUseDNS:
 		intptr = &options->use_dns;
 		goto parse_flag;
 
 	case sLogFacility:
 		log_facility_ptr = &options->log_facility;
 		arg = argv_next(&ac, &av);
 		value = log_facility_number(arg);
 		if (value == SYSLOG_FACILITY_NOT_SET)
 			fatal("%.200s line %d: unsupported log facility '%s'",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (*log_facility_ptr == -1)
 			*log_facility_ptr = (SyslogFacility) value;
 		break;
 
 	case sLogLevel:
 		log_level_ptr = &options->log_level;
 		arg = argv_next(&ac, &av);
 		value = log_level_number(arg);
 		if (value == SYSLOG_LEVEL_NOT_SET)
 			fatal("%.200s line %d: unsupported log level '%s'",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (*activep && *log_level_ptr == -1)
 			*log_level_ptr = (LogLevel) value;
 		break;
 
 	case sLogVerbose:
 		found = options->num_log_verbose == 0;
-		i = 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
-				if (i > 0 || ac > 0) {
+				if (nstrs > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			}
-			i++;
-			if (!found || !*activep)
-				continue;
 			opt_array_append(filename, linenum, keyword,
-			    &options->log_verbose, &options->num_log_verbose,
-			    arg);
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->log_verbose = strs;
+			options->num_log_verbose = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case sAllowTcpForwarding:
 		intptr = &options->allow_tcp_forwarding;
 		multistate_ptr = multistate_tcpfwd;
 		goto parse_multistate;
 
 	case sAllowStreamLocalForwarding:
 		intptr = &options->allow_streamlocal_forwarding;
 		multistate_ptr = multistate_tcpfwd;
 		goto parse_multistate;
 
 	case sAllowAgentForwarding:
 		intptr = &options->allow_agent_forwarding;
 		goto parse_flag;
 
 	case sDisableForwarding:
 		intptr = &options->disable_forwarding;
 		goto parse_flag;
 
 	case sAllowUsers:
 		chararrayptr = &options->allow_users;
 		uintptr = &options->num_allow_users;
  parse_allowdenyusers:
+		/* XXX appends to list; doesn't respect first-match-wins */
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0' ||
 			    match_user(NULL, NULL, NULL, arg) == -1)
 				fatal("%s line %d: invalid %s pattern: \"%s\"",
 				    filename, linenum, keyword, arg);
+			found = 1;
 			if (!*activep)
 				continue;
 			opt_array_append(filename, linenum, keyword,
 			    chararrayptr, uintptr, arg);
 		}
+		if (!found) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
 		break;
 
 	case sDenyUsers:
 		chararrayptr = &options->deny_users;
 		uintptr = &options->num_deny_users;
 		goto parse_allowdenyusers;
 
 	case sAllowGroups:
 		chararrayptr = &options->allow_groups;
 		uintptr = &options->num_allow_groups;
+		/* XXX appends to list; doesn't respect first-match-wins */
  parse_allowdenygroups:
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0')
 				fatal("%s line %d: empty %s pattern",
 				    filename, linenum, keyword);
+			found = 1;
 			if (!*activep)
 				continue;
 			opt_array_append(filename, linenum, keyword,
 			    chararrayptr, uintptr, arg);
 		}
+		if (!found) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
 		break;
 
 	case sDenyGroups:
 		chararrayptr = &options->deny_groups;
 		uintptr = &options->num_deny_groups;
 		goto parse_allowdenygroups;
 
 	case sCiphers:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*arg != '-' &&
 		    !ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
 			fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (options->ciphers == NULL)
 			options->ciphers = xstrdup(arg);
 		break;
 
 	case sMacs:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*arg != '-' &&
 		    !mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg))
 			fatal("%s line %d: Bad SSH2 mac spec '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (options->macs == NULL)
 			options->macs = xstrdup(arg);
 		break;
 
 	case sKexAlgorithms:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*arg != '-' &&
 		    !kex_names_valid(*arg == '+' || *arg == '^' ?
 		    arg + 1 : arg))
 			fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.",
 			    filename, linenum, arg ? arg : "<NONE>");
 		if (options->kex_algorithms == NULL)
 			options->kex_algorithms = xstrdup(arg);
 		break;
 
 	case sSubsystem:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (!*activep) {
 			argv_consume(&ac);
 			break;
 		}
 		found = 0;
 		for (i = 0; i < options->num_subsystems; i++) {
 			if (strcmp(arg, options->subsystem_name[i]) == 0) {
 				found = 1;
 				break;
 			}
 		}
 		if (found) {
 			debug("%s line %d: Subsystem '%s' already defined.",
 			    filename, linenum, arg);
 			argv_consume(&ac);
 			break;
 		}
 		options->subsystem_name = xrecallocarray(
 		    options->subsystem_name, options->num_subsystems,
 		    options->num_subsystems + 1,
 		    sizeof(*options->subsystem_name));
 		options->subsystem_command = xrecallocarray(
 		    options->subsystem_command, options->num_subsystems,
 		    options->num_subsystems + 1,
 		    sizeof(*options->subsystem_command));
 		options->subsystem_args = xrecallocarray(
 		    options->subsystem_args, options->num_subsystems,
 		    options->num_subsystems + 1,
 		    sizeof(*options->subsystem_args));
 		options->subsystem_name[options->num_subsystems] = xstrdup(arg);
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			fatal("%s line %d: Missing subsystem command.",
 			    filename, linenum);
 		}
 		options->subsystem_command[options->num_subsystems] =
 		    xstrdup(arg);
 		/* Collect arguments (separate to executable) */
 		arg = argv_assemble(1, &arg); /* quote command correctly */
 		arg2 = argv_assemble(ac, av); /* rest of command */
 		xasprintf(&options->subsystem_args[options->num_subsystems],
-		    "%s %s", arg, arg2);
+		    "%s%s%s", arg, *arg2 == '\0' ? "" : " ", arg2);
 		free(arg2);
 		argv_consume(&ac);
 		options->num_subsystems++;
 		break;
 
 	case sMaxStartups:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if ((n = sscanf(arg, "%d:%d:%d",
 		    &options->max_startups_begin,
 		    &options->max_startups_rate,
 		    &options->max_startups)) == 3) {
 			if (options->max_startups_begin >
 			    options->max_startups ||
 			    options->max_startups_rate > 100 ||
 			    options->max_startups_rate < 1)
 				fatal("%s line %d: Invalid %s spec.",
 				    filename, linenum, keyword);
 		} else if (n != 1)
 			fatal("%s line %d: Invalid %s spec.",
 			    filename, linenum, keyword);
 		else
 			options->max_startups = options->max_startups_begin;
 		if (options->max_startups <= 0 ||
 		    options->max_startups_begin <= 0)
 			fatal("%s line %d: Invalid %s spec.",
 			    filename, linenum, keyword);
 		break;
 
 	case sPerSourceNetBlockSize:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		switch (n = sscanf(arg, "%d:%d", &value, &value2)) {
 		case 2:
 			if (value2 < 0 || value2 > 128)
 				n = -1;
 			/* FALLTHROUGH */
 		case 1:
 			if (value < 0 || value > 32)
 				n = -1;
 		}
 		if (n != 1 && n != 2)
 			fatal("%s line %d: Invalid %s spec.",
 			    filename, linenum, keyword);
 		if (*activep) {
 			options->per_source_masklen_ipv4 = value;
 			options->per_source_masklen_ipv6 = value2;
 		}
 		break;
 
 	case sPerSourceMaxStartups:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (strcmp(arg, "none") == 0) { /* no limit */
 			value = INT_MAX;
 		} else {
 			if ((errstr = atoi_err(arg, &value)) != NULL)
 				fatal("%s line %d: %s integer value %s.",
 				    filename, linenum, keyword, errstr);
 		}
 		if (*activep && options->per_source_max_startups == -1)
 			options->per_source_max_startups = value;
 		break;
 
 	case sMaxAuthTries:
 		intptr = &options->max_authtries;
 		goto parse_int;
 
 	case sMaxSessions:
 		intptr = &options->max_sessions;
 		goto parse_int;
 
 	case sBanner:
 		charptr = &options->banner;
 		goto parse_filename;
 
 	/*
 	 * These options can contain %X options expanded at
 	 * connect time, so that you can specify paths like:
 	 *
 	 * AuthorizedKeysFile	/etc/ssh_keys/%u
 	 */
 	case sAuthorizedKeysFile:
-		uvalue = options->num_authkeys_files;
+		found = options->num_authkeys_files == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			arg2 = tilde_expand_filename(arg, getuid());
-			if (*activep && uvalue == 0) {
-				opt_array_append(filename, linenum, keyword,
-				    &options->authorized_keys_files,
-				    &options->num_authkeys_files, arg2);
-			}
+			opt_array_append(filename, linenum, keyword,
+			    &strs, &nstrs, arg2);
 			free(arg2);
 		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->authorized_keys_files = strs;
+			options->num_authkeys_files = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
+		}
 		break;
 
 	case sAuthorizedPrincipalsFile:
 		charptr = &options->authorized_principals_file;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*activep && *charptr == NULL) {
 			*charptr = tilde_expand_filename(arg, getuid());
 			/* increase optional counter */
 			if (intptr != NULL)
 				*intptr = *intptr + 1;
 		}
 		break;
 
 	case sClientAliveInterval:
 		intptr = &options->client_alive_interval;
 		goto parse_time;
 
 	case sClientAliveCountMax:
 		intptr = &options->client_alive_count_max;
 		goto parse_int;
 
 	case sAcceptEnv:
+		/* XXX appends to list; doesn't respect first-match-wins */
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0' || strchr(arg, '=') != NULL)
 				fatal("%s line %d: Invalid environment name.",
 				    filename, linenum);
+			found = 1;
 			if (!*activep)
 				continue;
 			opt_array_append(filename, linenum, keyword,
 			    &options->accept_env, &options->num_accept_env,
 			    arg);
 		}
+		if (!found) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
 		break;
 
 	case sSetEnv:
-		uvalue = options->num_setenv;
+		found = options->num_setenv == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (*arg == '\0' || strchr(arg, '=') == NULL)
 				fatal("%s line %d: Invalid environment.",
 				    filename, linenum);
-			if (!*activep || uvalue != 0)
-				continue;
-			if (lookup_setenv_in_list(arg, options->setenv,
-			    options->num_setenv) != NULL) {
+			if (lookup_setenv_in_list(arg, strs, nstrs) != NULL) {
 				debug2("%s line %d: ignoring duplicate env "
 				    "name \"%.64s\"", filename, linenum, arg);
 				continue;
 			}
 			opt_array_append(filename, linenum, keyword,
-			    &options->setenv, &options->num_setenv, arg);
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->setenv = strs;
+			options->num_setenv = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case sPermitTunnel:
 		intptr = &options->permit_tun;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		value = -1;
 		for (i = 0; tunmode_desc[i].val != -1; i++)
 			if (strcmp(tunmode_desc[i].text, arg) == 0) {
 				value = tunmode_desc[i].val;
 				break;
 			}
 		if (value == -1)
 			fatal("%s line %d: bad %s argument %s",
 			    filename, linenum, keyword, arg);
 		if (*activep && *intptr == -1)
 			*intptr = value;
 		break;
 
 	case sInclude:
 		if (cmdline) {
 			fatal("Include directive not supported as a "
 			    "command-line option");
 		}
 		value = 0;
 		while ((arg2 = argv_next(&ac, &av)) != NULL) {
 			if (*arg2 == '\0') {
 				error("%s line %d: keyword %s empty argument",
 				    filename, linenum, keyword);
 				goto out;
 			}
 			value++;
 			found = 0;
 			if (*arg2 != '/' && *arg2 != '~') {
 				xasprintf(&arg, "%s/%s", SSHDIR, arg2);
 			} else
 				arg = xstrdup(arg2);
 
 			/*
 			 * Don't let included files clobber the containing
 			 * file's Match state.
 			 */
 			oactive = *activep;
 
 			/* consult cache of include files */
 			TAILQ_FOREACH(item, includes, entry) {
 				if (strcmp(item->selector, arg) != 0)
 					continue;
 				if (item->filename != NULL) {
 					parse_server_config_depth(options,
 					    item->filename, item->contents,
 					    includes, connectinfo,
 					    (*inc_flags & SSHCFG_MATCH_ONLY
 					        ? SSHCFG_MATCH_ONLY : (oactive
 					            ? 0 : SSHCFG_NEVERMATCH)),
 					    activep, depth + 1);
 				}
 				found = 1;
 				*activep = oactive;
 			}
 			if (found != 0) {
 				free(arg);
 				continue;
 			}
 
 			/* requested glob was not in cache */
 			debug2("%s line %d: new include %s",
 			    filename, linenum, arg);
 			if ((r = glob(arg, 0, NULL, &gbuf)) != 0) {
 				if (r != GLOB_NOMATCH) {
 					fatal("%s line %d: include \"%s\" glob "
 					    "failed", filename, linenum, arg);
 				}
 				/*
 				 * If no entry matched then record a
 				 * placeholder to skip later glob calls.
 				 */
 				debug2("%s line %d: no match for %s",
 				    filename, linenum, arg);
 				item = xcalloc(1, sizeof(*item));
 				item->selector = strdup(arg);
 				TAILQ_INSERT_TAIL(includes,
 				    item, entry);
 			}
 			if (gbuf.gl_pathc > INT_MAX)
 				fatal_f("too many glob results");
 			for (n = 0; n < (int)gbuf.gl_pathc; n++) {
 				debug2("%s line %d: including %s",
 				    filename, linenum, gbuf.gl_pathv[n]);
 				item = xcalloc(1, sizeof(*item));
 				item->selector = strdup(arg);
 				item->filename = strdup(gbuf.gl_pathv[n]);
 				if ((item->contents = sshbuf_new()) == NULL)
 					fatal_f("sshbuf_new failed");
 				load_server_config(item->filename,
 				    item->contents);
 				parse_server_config_depth(options,
 				    item->filename, item->contents,
 				    includes, connectinfo,
 				    (*inc_flags & SSHCFG_MATCH_ONLY
 				        ? SSHCFG_MATCH_ONLY : (oactive
 				            ? 0 : SSHCFG_NEVERMATCH)),
 				    activep, depth + 1);
 				*activep = oactive;
 				TAILQ_INSERT_TAIL(includes, item, entry);
 			}
 			globfree(&gbuf);
 			free(arg);
 		}
 		if (value == 0) {
 			fatal("%s line %d: %s missing filename argument",
 			    filename, linenum, keyword);
 		}
 		break;
 
 	case sMatch:
 		if (cmdline)
 			fatal("Match directive not supported as a command-line "
 			    "option");
 		value = match_cfg_line(&str, linenum,
 		    (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
 		if (value < 0)
 			fatal("%s line %d: Bad Match condition", filename,
 			    linenum);
 		*activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
 		/*
 		 * The MATCH_ONLY flag is applicable only until the first
 		 * match block.
 		 */
 		*inc_flags &= ~SSHCFG_MATCH_ONLY;
 		/*
 		 * If match_cfg_line() didn't consume all its arguments then
 		 * arrange for the extra arguments check below to fail.
 		 */
 		if (str == NULL || *str == '\0')
 			argv_consume(&ac);
 		break;
 
 	case sPermitListen:
 	case sPermitOpen:
 		if (opcode == sPermitListen) {
 			uintptr = &options->num_permitted_listens;
 			chararrayptr = &options->permitted_listens;
 		} else {
 			uintptr = &options->num_permitted_opens;
 			chararrayptr = &options->permitted_opens;
 		}
-		arg = argv_next(&ac, &av);
-		if (!arg || *arg == '\0')
-			fatal("%s line %d: %s missing argument.",
-			    filename, linenum, keyword);
-		uvalue = *uintptr;	/* modified later */
-		if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
-			if (*activep && uvalue == 0) {
-				*uintptr = 1;
-				*chararrayptr = xcalloc(1,
-				    sizeof(**chararrayptr));
-				(*chararrayptr)[0] = xstrdup(arg);
+		found = *uintptr == 0;
+		while ((arg = argv_next(&ac, &av)) != NULL) {
+			if (strcmp(arg, "any") == 0 ||
+			    strcmp(arg, "none") == 0) {
+				if (nstrs != 0) {
+					fatal("%s line %d: %s must appear "
+					    "alone on a %s line.",
+					    filename, linenum, arg, keyword);
+				}
+				opt_array_append(filename, linenum, keyword,
+				    &strs, &nstrs, arg);
+				continue;
 			}
-			break;
-		}
-		for (; arg != NULL && *arg != '\0'; arg = argv_next(&ac, &av)) {
+
 			if (opcode == sPermitListen &&
 			    strchr(arg, ':') == NULL) {
 				/*
 				 * Allow bare port number for PermitListen
 				 * to indicate a wildcard listen host.
 				 */
 				xasprintf(&arg2, "*:%s", arg);
 			} else {
 				arg2 = xstrdup(arg);
 				p = hpdelim(&arg);
 				if (p == NULL) {
 					fatal("%s line %d: %s missing host",
 					    filename, linenum, keyword);
 				}
 				p = cleanhostname(p);
 			}
 			if (arg == NULL ||
 			    ((port = permitopen_port(arg)) < 0)) {
 				fatal("%s line %d: %s bad port number",
 				    filename, linenum, keyword);
 			}
-			if (*activep && uvalue == 0) {
-				opt_array_append(filename, linenum, keyword,
-				    chararrayptr, uintptr, arg2);
-			}
+			opt_array_append(filename, linenum, keyword,
+			    &strs, &nstrs, arg2);
 			free(arg2);
 		}
+		if (nstrs == 0) {
+			fatal("%s line %d: %s missing argument.",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			*chararrayptr = strs;
+			*uintptr = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
+		}
 		break;
 
 	case sForceCommand:
 		if (str == NULL || *str == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		len = strspn(str, WHITESPACE);
 		if (*activep && options->adm_forced_command == NULL)
 			options->adm_forced_command = xstrdup(str + len);
 		argv_consume(&ac);
 		break;
 
 	case sChrootDirectory:
 		charptr = &options->chroot_directory;
 
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case sTrustedUserCAKeys:
 		charptr = &options->trusted_user_ca_keys;
 		goto parse_filename;
 
 	case sRevokedKeys:
 		charptr = &options->revoked_keys_file;
 		goto parse_filename;
 
 	case sSecurityKeyProvider:
 		charptr = &options->sk_provider;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (*activep && *charptr == NULL) {
 			*charptr = strcasecmp(arg, "internal") == 0 ?
 			    xstrdup(arg) : derelativise_path(arg);
 			/* increase optional counter */
 			if (intptr != NULL)
 				*intptr = *intptr + 1;
 		}
 		break;
 
 	case sIPQoS:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if ((value = parse_ipqos(arg)) == -1)
 			fatal("%s line %d: Bad %s value: %s",
 			    filename, linenum, keyword, arg);
 		arg = argv_next(&ac, &av);
 		if (arg == NULL)
 			value2 = value;
 		else if ((value2 = parse_ipqos(arg)) == -1)
 			fatal("%s line %d: Bad %s value: %s",
 			    filename, linenum, keyword, arg);
 		if (*activep) {
 			options->ip_qos_interactive = value;
 			options->ip_qos_bulk = value2;
 		}
 		break;
 
 	case sVersionAddendum:
 		if (str == NULL || *str == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		len = strspn(str, WHITESPACE);
 		if (strchr(str + len, '\r') != NULL) {
 			fatal("%.200s line %d: Invalid %s argument",
 			    filename, linenum, keyword);
 		}
 		if ((arg = strchr(line, '#')) != NULL) {
 			*arg = '\0';
 			rtrim(line);
 		}
 		if (*activep && options->version_addendum == NULL) {
 			if (strcasecmp(str + len, "none") == 0)
 				options->version_addendum = xstrdup("");
 			else
 				options->version_addendum = xstrdup(str + len);
 		}
 		argv_consume(&ac);
 		break;
 
 	case sAuthorizedKeysCommand:
 		charptr = &options->authorized_keys_command;
  parse_command:
 		len = strspn(str, WHITESPACE);
 		if (str[len] != '/' && strcasecmp(str + len, "none") != 0) {
 			fatal("%.200s line %d: %s must be an absolute path",
 			    filename, linenum, keyword);
 		}
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(str + len);
 		argv_consume(&ac);
 		break;
 
 	case sAuthorizedKeysCommandUser:
 		charptr = &options->authorized_keys_command_user;
  parse_localuser:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0') {
 			fatal("%s line %d: missing %s argument.",
 			    filename, linenum, keyword);
 		}
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case sAuthorizedPrincipalsCommand:
 		charptr = &options->authorized_principals_command;
 		goto parse_command;
 
 	case sAuthorizedPrincipalsCommandUser:
 		charptr = &options->authorized_principals_command_user;
 		goto parse_localuser;
 
 	case sAuthenticationMethods:
 		found = options->num_auth_methods == 0;
 		value = 0; /* seen "any" pseudo-method */
-		value2 = 0; /* successfully parsed any method */
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			if (strcmp(arg, "any") == 0) {
-				if (options->num_auth_methods > 0) {
+				if (nstrs > 0) {
 					fatal("%s line %d: \"any\" must "
 					    "appear alone in %s",
 					    filename, linenum, keyword);
 				}
 				value = 1;
 			} else if (value) {
 				fatal("%s line %d: \"any\" must appear "
 				    "alone in %s", filename, linenum, keyword);
 			} else if (auth2_methods_valid(arg, 0) != 0) {
 				fatal("%s line %d: invalid %s method list.",
 				    filename, linenum, keyword);
 			}
-			value2 = 1;
-			if (!found || !*activep)
-				continue;
 			opt_array_append(filename, linenum, keyword,
-			    &options->auth_methods,
-			    &options->num_auth_methods, arg);
+			    &strs, &nstrs, arg);
 		}
-		if (value2 == 0) {
+		if (nstrs == 0) {
 			fatal("%s line %d: no %s specified",
 			    filename, linenum, keyword);
 		}
+		if (found && *activep) {
+			options->auth_methods = strs;
+			options->num_auth_methods = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
+		}
 		break;
 
 	case sStreamLocalBindMask:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		/* Parse mode in octal format */
 		value = strtol(arg, &p, 8);
 		if (arg == p || value < 0 || value > 0777)
 			fatal("%s line %d: Invalid %s.",
 			    filename, linenum, keyword);
 		if (*activep)
 			options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
 		break;
 
 	case sStreamLocalBindUnlink:
 		intptr = &options->fwd_opts.streamlocal_bind_unlink;
 		goto parse_flag;
 
 	case sFingerprintHash:
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if ((value = ssh_digest_alg_by_name(arg)) == -1)
 			fatal("%.200s line %d: Invalid %s algorithm \"%s\".",
 			    filename, linenum, keyword, arg);
 		if (*activep)
 			options->fingerprint_hash = value;
 		break;
 
 	case sExposeAuthInfo:
 		intptr = &options->expose_userauth_info;
 		goto parse_flag;
 
 	case sRDomain:
 #if !defined(__OpenBSD__) && !defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
 		fatal("%s line %d: setting RDomain not supported on this "
 		    "platform.", filename, linenum);
 #endif
 		charptr = &options->routing_domain;
 		arg = argv_next(&ac, &av);
 		if (!arg || *arg == '\0')
 			fatal("%s line %d: %s missing argument.",
 			    filename, linenum, keyword);
 		if (strcasecmp(arg, "none") != 0 && strcmp(arg, "%D") != 0 &&
 		    !valid_rdomain(arg))
 			fatal("%s line %d: invalid routing domain",
 			    filename, linenum);
 		if (*activep && *charptr == NULL)
 			*charptr = xstrdup(arg);
 		break;
 
 	case sRequiredRSASize:
 		intptr = &options->required_rsa_size;
 		goto parse_int;
 
 	case sChannelTimeout:
-		uvalue = options->num_channel_timeouts;
-		i = 0;
+		found = options->num_channel_timeouts == 0;
 		while ((arg = argv_next(&ac, &av)) != NULL) {
 			/* Allow "none" only in first position */
 			if (strcasecmp(arg, "none") == 0) {
-				if (i > 0 || ac > 0) {
+				if (nstrs > 0 || ac > 0) {
 					error("%s line %d: keyword %s \"none\" "
 					    "argument must appear alone.",
 					    filename, linenum, keyword);
 					goto out;
 				}
 			} else if (parse_pattern_interval(arg,
 			    NULL, NULL) != 0) {
 				fatal("%s line %d: invalid channel timeout %s",
 				    filename, linenum, arg);
 			}
-			if (!*activep || uvalue != 0)
-				continue;
 			opt_array_append(filename, linenum, keyword,
-			    &options->channel_timeouts,
-			    &options->num_channel_timeouts, arg);
+			    &strs, &nstrs, arg);
+		}
+		if (nstrs == 0) {
+			fatal("%s line %d: no %s specified",
+			    filename, linenum, keyword);
+		}
+		if (found && *activep) {
+			options->channel_timeouts = strs;
+			options->num_channel_timeouts = nstrs;
+			strs = NULL; /* transferred */
+			nstrs = 0;
 		}
 		break;
 
 	case sUnusedConnectionTimeout:
 		intptr = &options->unused_connection_timeout;
 		/* peek at first arg for "none" so we can reuse parse_time */
 		if (av[0] != NULL && strcasecmp(av[0], "none") == 0) {
 			(void)argv_next(&ac, &av); /* consume arg */
 			if (*activep)
 				*intptr = 0;
 			break;
 		}
 		goto parse_time;
 
 	case sDeprecated:
 	case sIgnore:
 	case sUnsupported:
 		do_log2(opcode == sIgnore ?
 		    SYSLOG_LEVEL_DEBUG2 : SYSLOG_LEVEL_INFO,
 		    "%s line %d: %s option %s", filename, linenum,
 		    opcode == sUnsupported ? "Unsupported" : "Deprecated",
 		    keyword);
 		argv_consume(&ac);
 		break;
 
 	default:
 		fatal("%s line %d: Missing handler for opcode %s (%d)",
 		    filename, linenum, keyword, opcode);
 	}
 	/* Check that there is no garbage at end of line. */
 	if (ac > 0) {
 		error("%.200s line %d: keyword %s extra arguments "
 		    "at end of line", filename, linenum, keyword);
 		goto out;
 	}
 
 	/* success */
 	ret = 0;
  out:
+	opt_array_free2(strs, NULL, nstrs);
 	argv_free(oav, oac);
 	return ret;
 }
 
 int
 process_server_config_line(ServerOptions *options, char *line,
     const char *filename, int linenum, int *activep,
     struct connection_info *connectinfo, struct include_list *includes)
 {
 	int inc_flags = 0;
 
 	return process_server_config_line_depth(options, line, filename,
 	    linenum, activep, connectinfo, &inc_flags, 0, includes);
 }
 
 
 /* Reads the server configuration file. */
 
 void
 load_server_config(const char *filename, struct sshbuf *conf)
 {
 	struct stat st;
 	char *line = NULL, *cp;
 	size_t linesize = 0;
 	FILE *f;
 	int r;
 
 	debug2_f("filename %s", filename);
 	if ((f = fopen(filename, "r")) == NULL) {
 		perror(filename);
 		exit(1);
 	}
 	sshbuf_reset(conf);
 	/* grow buffer, so realloc is avoided for large config files */
 	if (fstat(fileno(f), &st) == 0 && st.st_size > 0 &&
 	    (r = sshbuf_allocate(conf, st.st_size)) != 0)
 		fatal_fr(r, "allocate");
 	while (getline(&line, &linesize, f) != -1) {
 		/*
 		 * Strip whitespace
 		 * NB - preserve newlines, they are needed to reproduce
 		 * line numbers later for error messages
 		 */
 		cp = line + strspn(line, " \t\r");
 		if ((r = sshbuf_put(conf, cp, strlen(cp))) != 0)
 			fatal_fr(r, "sshbuf_put");
 	}
 	free(line);
 	if ((r = sshbuf_put_u8(conf, 0)) != 0)
 		fatal_fr(r, "sshbuf_put_u8");
 	fclose(f);
 	debug2_f("done config len = %zu", sshbuf_len(conf));
 }
 
 void
 parse_server_match_config(ServerOptions *options,
    struct include_list *includes, struct connection_info *connectinfo)
 {
 	ServerOptions mo;
 
 	initialize_server_options(&mo);
 	parse_server_config(&mo, "reprocess config", cfg, includes,
 	    connectinfo, 0);
 	copy_set_server_options(options, &mo, 0);
 }
 
 int parse_server_match_testspec(struct connection_info *ci, char *spec)
 {
 	char *p;
 
 	while ((p = strsep(&spec, ",")) && *p != '\0') {
 		if (strncmp(p, "addr=", 5) == 0) {
 			ci->address = xstrdup(p + 5);
 		} else if (strncmp(p, "host=", 5) == 0) {
 			ci->host = xstrdup(p + 5);
 		} else if (strncmp(p, "user=", 5) == 0) {
 			ci->user = xstrdup(p + 5);
 		} else if (strncmp(p, "laddr=", 6) == 0) {
 			ci->laddress = xstrdup(p + 6);
 		} else if (strncmp(p, "rdomain=", 8) == 0) {
 			ci->rdomain = xstrdup(p + 8);
 		} else if (strncmp(p, "lport=", 6) == 0) {
 			ci->lport = a2port(p + 6);
 			if (ci->lport == -1) {
 				fprintf(stderr, "Invalid port '%s' in test mode"
 				    " specification %s\n", p+6, p);
 				return -1;
 			}
 		} else {
 			fprintf(stderr, "Invalid test mode specification %s\n",
 			    p);
 			return -1;
 		}
 	}
 	return 0;
 }
 
 void
 servconf_merge_subsystems(ServerOptions *dst, ServerOptions *src)
 {
 	u_int i, j, found;
 
 	for (i = 0; i < src->num_subsystems; i++) {
 		found = 0;
 		for (j = 0; j < dst->num_subsystems; j++) {
 			if (strcmp(src->subsystem_name[i],
 			    dst->subsystem_name[j]) == 0) {
 				found = 1;
 				break;
 			}
 		}
 		if (found) {
 			debug_f("override \"%s\"", dst->subsystem_name[j]);
 			free(dst->subsystem_command[j]);
 			free(dst->subsystem_args[j]);
 			dst->subsystem_command[j] =
 			    xstrdup(src->subsystem_command[i]);
 			dst->subsystem_args[j] =
 			    xstrdup(src->subsystem_args[i]);
 			continue;
 		}
 		debug_f("add \"%s\"", src->subsystem_name[i]);
 		dst->subsystem_name = xrecallocarray(
 		    dst->subsystem_name, dst->num_subsystems,
 		    dst->num_subsystems + 1, sizeof(*dst->subsystem_name));
 		dst->subsystem_command = xrecallocarray(
 		    dst->subsystem_command, dst->num_subsystems,
 		    dst->num_subsystems + 1, sizeof(*dst->subsystem_command));
 		dst->subsystem_args = xrecallocarray(
 		    dst->subsystem_args, dst->num_subsystems,
 		    dst->num_subsystems + 1, sizeof(*dst->subsystem_args));
 		j = dst->num_subsystems++;
 		dst->subsystem_name[j] = xstrdup(src->subsystem_name[i]);
 		dst->subsystem_command[j] = xstrdup(src->subsystem_command[i]);
 		dst->subsystem_args[j] = xstrdup(src->subsystem_args[i]);
 	}
 }
 
 /*
  * Copy any supported values that are set.
  *
  * If the preauth flag is set, we do not bother copying the string or
  * array values that are not used pre-authentication, because any that we
  * do use must be explicitly sent in mm_getpwnamallow().
  */
 void
 copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
 {
 #define M_CP_INTOPT(n) do {\
 	if (src->n != -1) \
 		dst->n = src->n; \
 } while (0)
 
 	M_CP_INTOPT(password_authentication);
 	M_CP_INTOPT(gss_authentication);
 	M_CP_INTOPT(pubkey_authentication);
 	M_CP_INTOPT(pubkey_auth_options);
 	M_CP_INTOPT(kerberos_authentication);
 	M_CP_INTOPT(hostbased_authentication);
 	M_CP_INTOPT(hostbased_uses_name_from_packet_only);
 	M_CP_INTOPT(kbd_interactive_authentication);
 	M_CP_INTOPT(permit_root_login);
 	M_CP_INTOPT(permit_empty_passwd);
 	M_CP_INTOPT(ignore_rhosts);
 
 	M_CP_INTOPT(allow_tcp_forwarding);
 	M_CP_INTOPT(allow_streamlocal_forwarding);
 	M_CP_INTOPT(allow_agent_forwarding);
 	M_CP_INTOPT(disable_forwarding);
 	M_CP_INTOPT(expose_userauth_info);
 	M_CP_INTOPT(permit_tun);
 	M_CP_INTOPT(fwd_opts.gateway_ports);
 	M_CP_INTOPT(fwd_opts.streamlocal_bind_unlink);
 	M_CP_INTOPT(x11_display_offset);
 	M_CP_INTOPT(x11_forwarding);
 	M_CP_INTOPT(x11_use_localhost);
 	M_CP_INTOPT(permit_tty);
 	M_CP_INTOPT(permit_user_rc);
 	M_CP_INTOPT(max_sessions);
 	M_CP_INTOPT(max_authtries);
 	M_CP_INTOPT(client_alive_count_max);
 	M_CP_INTOPT(client_alive_interval);
 	M_CP_INTOPT(ip_qos_interactive);
 	M_CP_INTOPT(ip_qos_bulk);
 	M_CP_INTOPT(rekey_limit);
 	M_CP_INTOPT(rekey_interval);
 	M_CP_INTOPT(log_level);
 	M_CP_INTOPT(required_rsa_size);
 	M_CP_INTOPT(unused_connection_timeout);
 
 	/*
 	 * The bind_mask is a mode_t that may be unsigned, so we can't use
 	 * M_CP_INTOPT - it does a signed comparison that causes compiler
 	 * warnings.
 	 */
 	if (src->fwd_opts.streamlocal_bind_mask != (mode_t)-1) {
 		dst->fwd_opts.streamlocal_bind_mask =
 		    src->fwd_opts.streamlocal_bind_mask;
 	}
 
 	/* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */
 #define M_CP_STROPT(n) do {\
 	if (src->n != NULL && dst->n != src->n) { \
 		free(dst->n); \
 		dst->n = src->n; \
 	} \
 } while(0)
 #define M_CP_STRARRAYOPT(s, num_s) do {\
 	u_int i; \
 	if (src->num_s != 0) { \
 		for (i = 0; i < dst->num_s; i++) \
 			free(dst->s[i]); \
 		free(dst->s); \
 		dst->s = xcalloc(src->num_s, sizeof(*dst->s)); \
 		for (i = 0; i < src->num_s; i++) \
 			dst->s[i] = xstrdup(src->s[i]); \
 		dst->num_s = src->num_s; \
 	} \
 } while(0)
 
 	/* See comment in servconf.h */
 	COPY_MATCH_STRING_OPTS();
 
 	/* Arguments that accept '+...' need to be expanded */
 	assemble_algorithms(dst);
 
 	/*
 	 * The only things that should be below this point are string options
 	 * which are only used after authentication.
 	 */
 	if (preauth)
 		return;
 
 	/* These options may be "none" to clear a global setting */
 	M_CP_STROPT(adm_forced_command);
 	if (option_clear_or_none(dst->adm_forced_command)) {
 		free(dst->adm_forced_command);
 		dst->adm_forced_command = NULL;
 	}
 	M_CP_STROPT(chroot_directory);
 	if (option_clear_or_none(dst->chroot_directory)) {
 		free(dst->chroot_directory);
 		dst->chroot_directory = NULL;
 	}
 
 	/* Subsystems require merging. */
 	servconf_merge_subsystems(dst, src);
 }
 
 #undef M_CP_INTOPT
 #undef M_CP_STROPT
 #undef M_CP_STRARRAYOPT
 
 #define SERVCONF_MAX_DEPTH	16
 static void
 parse_server_config_depth(ServerOptions *options, const char *filename,
     struct sshbuf *conf, struct include_list *includes,
     struct connection_info *connectinfo, int flags, int *activep, int depth)
 {
 	int linenum, bad_options = 0;
 	char *cp, *obuf, *cbuf;
 
 	if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
 		fatal("Too many recursive configuration includes");
 
 	debug2_f("config %s len %zu%s", filename, sshbuf_len(conf),
 	    (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
 
 	if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
 		fatal_f("sshbuf_dup_string failed");
 	linenum = 1;
 	while ((cp = strsep(&cbuf, "\n")) != NULL) {
 		if (process_server_config_line_depth(options, cp,
 		    filename, linenum++, activep, connectinfo, &flags,
 		    depth, includes) != 0)
 			bad_options++;
 	}
 	free(obuf);
 	if (bad_options > 0)
 		fatal("%s: terminating, %d bad configuration options",
 		    filename, bad_options);
 }
 
 void
 parse_server_config(ServerOptions *options, const char *filename,
     struct sshbuf *conf, struct include_list *includes,
     struct connection_info *connectinfo, int reexec)
 {
 	int active = connectinfo ? 0 : 1;
 	parse_server_config_depth(options, filename, conf, includes,
 	    connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
 	if (!reexec)
 		process_queued_listen_addrs(options);
 }
 
 static const char *
 fmt_multistate_int(int val, const struct multistate *m)
 {
 	u_int i;
 
 	for (i = 0; m[i].key != NULL; i++) {
 		if (m[i].value == val)
 			return m[i].key;
 	}
 	return "UNKNOWN";
 }
 
 static const char *
 fmt_intarg(ServerOpCodes code, int val)
 {
 	if (val == -1)
 		return "unset";
 	switch (code) {
 	case sAddressFamily:
 		return fmt_multistate_int(val, multistate_addressfamily);
 	case sPermitRootLogin:
 		return fmt_multistate_int(val, multistate_permitrootlogin);
 	case sGatewayPorts:
 		return fmt_multistate_int(val, multistate_gatewayports);
 	case sCompression:
 		return fmt_multistate_int(val, multistate_compression);
 	case sAllowTcpForwarding:
 		return fmt_multistate_int(val, multistate_tcpfwd);
 	case sAllowStreamLocalForwarding:
 		return fmt_multistate_int(val, multistate_tcpfwd);
 	case sIgnoreRhosts:
 		return fmt_multistate_int(val, multistate_ignore_rhosts);
 	case sFingerprintHash:
 		return ssh_digest_alg_name(val);
 	default:
 		switch (val) {
 		case 0:
 			return "no";
 		case 1:
 			return "yes";
 		default:
 			return "UNKNOWN";
 		}
 	}
 }
 
 static void
 dump_cfg_int(ServerOpCodes code, int val)
 {
 	if (code == sUnusedConnectionTimeout && val == 0) {
 		printf("%s none\n", lookup_opcode_name(code));
 		return;
 	}
 	printf("%s %d\n", lookup_opcode_name(code), val);
 }
 
 static void
 dump_cfg_oct(ServerOpCodes code, int val)
 {
 	printf("%s 0%o\n", lookup_opcode_name(code), val);
 }
 
 static void
 dump_cfg_fmtint(ServerOpCodes code, int val)
 {
 	printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
 }
 
 static void
 dump_cfg_string(ServerOpCodes code, const char *val)
 {
 	printf("%s %s\n", lookup_opcode_name(code),
 	    val == NULL ? "none" : val);
 }
 
 static void
 dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals)
 {
 	u_int i;
 
 	for (i = 0; i < count; i++)
 		printf("%s %s\n", lookup_opcode_name(code), vals[i]);
 }
 
 static void
 dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals)
 {
 	u_int i;
 
 	switch (code) {
 	case sAuthenticationMethods:
 	case sChannelTimeout:
 		break;
 	default:
 		if (count <= 0)
 			return;
 		break;
 	}
 
 	printf("%s", lookup_opcode_name(code));
 	for (i = 0; i < count; i++)
 		printf(" %s",  vals[i]);
 	if (code == sAuthenticationMethods && count == 0)
 		printf(" any");
 	else if (code == sChannelTimeout && count == 0)
 		printf(" none");
 	printf("\n");
 }
 
 static char *
 format_listen_addrs(struct listenaddr *la)
 {
 	int r;
 	struct addrinfo *ai;
 	char addr[NI_MAXHOST], port[NI_MAXSERV];
 	char *laddr1 = xstrdup(""), *laddr2 = NULL;
 
 	/*
 	 * ListenAddress must be after Port.  add_one_listen_addr pushes
 	 * addresses onto a stack, so to maintain ordering we need to
 	 * print these in reverse order.
 	 */
 	for (ai = la->addrs; ai; ai = ai->ai_next) {
 		if ((r = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
 		    sizeof(addr), port, sizeof(port),
 		    NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
 			error("getnameinfo: %.100s", ssh_gai_strerror(r));
 			continue;
 		}
 		laddr2 = laddr1;
 		if (ai->ai_family == AF_INET6) {
 			xasprintf(&laddr1, "listenaddress [%s]:%s%s%s\n%s",
 			    addr, port,
 			    la->rdomain == NULL ? "" : " rdomain ",
 			    la->rdomain == NULL ? "" : la->rdomain,
 			    laddr2);
 		} else {
 			xasprintf(&laddr1, "listenaddress %s:%s%s%s\n%s",
 			    addr, port,
 			    la->rdomain == NULL ? "" : " rdomain ",
 			    la->rdomain == NULL ? "" : la->rdomain,
 			    laddr2);
 		}
 		free(laddr2);
 	}
 	return laddr1;
 }
 
 void
 dump_config(ServerOptions *o)
 {
 	char *s;
 	u_int i;
 
 	/* these are usually at the top of the config */
 	for (i = 0; i < o->num_ports; i++)
 		printf("port %d\n", o->ports[i]);
 	dump_cfg_fmtint(sAddressFamily, o->address_family);
 
 	for (i = 0; i < o->num_listen_addrs; i++) {
 		s = format_listen_addrs(&o->listen_addrs[i]);
 		printf("%s", s);
 		free(s);
 	}
 
 	/* integer arguments */
 #ifdef USE_PAM
 	dump_cfg_fmtint(sUsePAM, o->use_pam);
 #endif
 	dump_cfg_int(sLoginGraceTime, o->login_grace_time);
 	dump_cfg_int(sX11DisplayOffset, o->x11_display_offset);
 	dump_cfg_int(sMaxAuthTries, o->max_authtries);
 	dump_cfg_int(sMaxSessions, o->max_sessions);
 	dump_cfg_int(sClientAliveInterval, o->client_alive_interval);
 	dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max);
 	dump_cfg_int(sRequiredRSASize, o->required_rsa_size);
 	dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask);
 	dump_cfg_int(sUnusedConnectionTimeout, o->unused_connection_timeout);
 
 	/* formatted integer arguments */
 	dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login);
 	dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts);
 	dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts);
 	dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication);
 	dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly,
 	    o->hostbased_uses_name_from_packet_only);
 	dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication);
 #ifdef KRB5
 	dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication);
 	dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd);
 	dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup);
 # ifdef USE_AFS
 	dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token);
 # endif
 #endif
 #ifdef GSSAPI
 	dump_cfg_fmtint(sGssAuthentication, o->gss_authentication);
 	dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds);
 #endif
 	dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication);
 	dump_cfg_fmtint(sKbdInteractiveAuthentication,
 	    o->kbd_interactive_authentication);
 	dump_cfg_fmtint(sPrintMotd, o->print_motd);
 #ifndef DISABLE_LASTLOG
 	dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
 #endif
 	dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
 	dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
 	dump_cfg_fmtint(sPermitTTY, o->permit_tty);
 	dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc);
 	dump_cfg_fmtint(sStrictModes, o->strict_modes);
 	dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
 	dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
 	dump_cfg_fmtint(sCompression, o->compression);
 	dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports);
 	dump_cfg_fmtint(sUseDNS, o->use_dns);
 	dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
 	dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding);
 	dump_cfg_fmtint(sDisableForwarding, o->disable_forwarding);
 	dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding);
 	dump_cfg_fmtint(sStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
 	dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
 	dump_cfg_fmtint(sExposeAuthInfo, o->expose_userauth_info);
 
 	/* string arguments */
 	dump_cfg_string(sPidFile, o->pid_file);
 	dump_cfg_string(sModuliFile, o->moduli_file);
 	dump_cfg_string(sXAuthLocation, o->xauth_location);
 	dump_cfg_string(sCiphers, o->ciphers);
 	dump_cfg_string(sMacs, o->macs);
 	dump_cfg_string(sBanner, o->banner);
 	dump_cfg_string(sForceCommand, o->adm_forced_command);
 	dump_cfg_string(sChrootDirectory, o->chroot_directory);
 	dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys);
 	dump_cfg_string(sRevokedKeys, o->revoked_keys_file);
 	dump_cfg_string(sSecurityKeyProvider, o->sk_provider);
 	dump_cfg_string(sAuthorizedPrincipalsFile,
 	    o->authorized_principals_file);
 	dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0'
 	    ? "none" : o->version_addendum);
 	dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command);
 	dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user);
 	dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
 	dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
 	dump_cfg_string(sHostKeyAgent, o->host_key_agent);
 	dump_cfg_string(sKexAlgorithms, o->kex_algorithms);
 	dump_cfg_string(sCASignatureAlgorithms, o->ca_sign_algorithms);
 	dump_cfg_string(sHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
 	dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms);
 	dump_cfg_string(sPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
 #if defined(__OpenBSD__) || defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
 	dump_cfg_string(sRDomain, o->routing_domain);
 #endif
 
 	/* string arguments requiring a lookup */
 	dump_cfg_string(sLogLevel, log_level_name(o->log_level));
 	dump_cfg_string(sLogFacility, log_facility_name(o->log_facility));
 
 	/* string array arguments */
 	dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files,
 	    o->authorized_keys_files);
 	dump_cfg_strarray(sHostKeyFile, o->num_host_key_files,
 	    o->host_key_files);
 	dump_cfg_strarray(sHostCertificate, o->num_host_cert_files,
 	    o->host_cert_files);
 	dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users);
 	dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users);
 	dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups);
 	dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups);
 	dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env);
 	dump_cfg_strarray(sSetEnv, o->num_setenv, o->setenv);
 	dump_cfg_strarray_oneline(sAuthenticationMethods,
 	    o->num_auth_methods, o->auth_methods);
 	dump_cfg_strarray_oneline(sLogVerbose,
 	    o->num_log_verbose, o->log_verbose);
 	dump_cfg_strarray_oneline(sChannelTimeout,
 	    o->num_channel_timeouts, o->channel_timeouts);
 
 	/* other arguments */
 	for (i = 0; i < o->num_subsystems; i++)
 		printf("subsystem %s %s\n", o->subsystem_name[i],
 		    o->subsystem_args[i]);
 
 	printf("maxstartups %d:%d:%d\n", o->max_startups_begin,
 	    o->max_startups_rate, o->max_startups);
 	printf("persourcemaxstartups ");
 	if (o->per_source_max_startups == INT_MAX)
 		printf("none\n");
 	else
 		printf("%d\n", o->per_source_max_startups);
 	printf("persourcenetblocksize %d:%d\n", o->per_source_masklen_ipv4,
 	    o->per_source_masklen_ipv6);
 
 	s = NULL;
 	for (i = 0; tunmode_desc[i].val != -1; i++) {
 		if (tunmode_desc[i].val == o->permit_tun) {
 			s = tunmode_desc[i].text;
 			break;
 		}
 	}
 	dump_cfg_string(sPermitTunnel, s);
 
 	printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
 	printf("%s\n", iptos2str(o->ip_qos_bulk));
 
 	printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
 	    o->rekey_interval);
 
 	printf("permitopen");
 	if (o->num_permitted_opens == 0)
 		printf(" any");
 	else {
 		for (i = 0; i < o->num_permitted_opens; i++)
 			printf(" %s", o->permitted_opens[i]);
 	}
 	printf("\n");
 	printf("permitlisten");
 	if (o->num_permitted_listens == 0)
 		printf(" any");
 	else {
 		for (i = 0; i < o->num_permitted_listens; i++)
 			printf(" %s", o->permitted_listens[i]);
 	}
 	printf("\n");
 
 	if (o->permit_user_env_allowlist == NULL) {
 		dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env);
 	} else {
 		printf("permituserenvironment %s\n",
 		    o->permit_user_env_allowlist);
 	}
 
 	printf("pubkeyauthoptions");
 	if (o->pubkey_auth_options == 0)
 		printf(" none");
 	if (o->pubkey_auth_options & PUBKEYAUTH_TOUCH_REQUIRED)
 		printf(" touch-required");
 	if (o->pubkey_auth_options & PUBKEYAUTH_VERIFY_REQUIRED)
 		printf(" verify-required");
 	printf("\n");
 }
diff --git a/session.c b/session.c
index aa342e84de4c..c821dcd4462d 100644
--- a/session.c
+++ b/session.c
@@ -1,2732 +1,2732 @@
-/* $OpenBSD: session.c,v 1.336 2023/08/10 23:05:48 djm Exp $ */
+/* $OpenBSD: session.c,v 1.337 2024/02/01 02:37:33 djm Exp $ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * SSH2 support by Markus Friedl.
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/wait.h>
 
 #include <arpa/inet.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <grp.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #include <pwd.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <unistd.h>
 #include <limits.h>
 
 #include "openbsd-compat/sys-queue.h"
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "sshpty.h"
 #include "packet.h"
 #include "sshbuf.h"
 #include "ssherr.h"
 #include "match.h"
 #include "uidswap.h"
 #include "channels.h"
 #include "sshkey.h"
 #include "cipher.h"
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 #include "hostfile.h"
 #include "auth.h"
 #include "auth-options.h"
 #include "authfd.h"
 #include "pathnames.h"
 #include "log.h"
 #include "misc.h"
 #include "servconf.h"
 #include "sshlogin.h"
 #include "serverloop.h"
 #include "canohost.h"
 #include "session.h"
 #include "kex.h"
 #include "monitor_wrap.h"
 #include "sftp.h"
 #include "atomicio.h"
 
 #if defined(KRB5) && defined(USE_AFS)
 #include <kafs.h>
 #endif
 
 #ifdef WITH_SELINUX
 #include <selinux/selinux.h>
 #endif
 
 #define IS_INTERNAL_SFTP(c) \
 	(!strncmp(c, INTERNAL_SFTP_NAME, sizeof(INTERNAL_SFTP_NAME) - 1) && \
 	 (c[sizeof(INTERNAL_SFTP_NAME) - 1] == '\0' || \
 	  c[sizeof(INTERNAL_SFTP_NAME) - 1] == ' ' || \
 	  c[sizeof(INTERNAL_SFTP_NAME) - 1] == '\t'))
 
 /* func */
 
 Session *session_new(void);
 void	session_set_fds(struct ssh *, Session *, int, int, int, int, int);
 void	session_pty_cleanup(Session *);
 void	session_proctitle(Session *);
 int	session_setup_x11fwd(struct ssh *, Session *);
 int	do_exec_pty(struct ssh *, Session *, const char *);
 int	do_exec_no_pty(struct ssh *, Session *, const char *);
 int	do_exec(struct ssh *, Session *, const char *);
 void	do_login(struct ssh *, Session *, const char *);
 void	do_child(struct ssh *, Session *, const char *);
 void	do_motd(void);
 int	check_quietlogin(Session *, const char *);
 
 static void do_authenticated2(struct ssh *, Authctxt *);
 
 static int session_pty_req(struct ssh *, Session *);
 
 /* import */
 extern ServerOptions options;
 extern char *__progname;
 extern int debug_flag;
 extern u_int utmp_len;
 extern int startup_pipe;
 extern void destroy_sensitive_data(void);
 extern struct sshbuf *loginmsg;
 extern struct sshauthopt *auth_opts;
 extern char *tun_fwd_ifnames; /* serverloop.c */
 
 /* original command from peer. */
 const char *original_command = NULL;
 
 /* data */
 static int sessions_first_unused = -1;
 static int sessions_nalloc = 0;
 static Session *sessions = NULL;
 
 #define SUBSYSTEM_NONE			0
 #define SUBSYSTEM_EXT			1
 #define SUBSYSTEM_INT_SFTP		2
 #define SUBSYSTEM_INT_SFTP_ERROR	3
 
 #ifdef HAVE_LOGIN_CAP
 login_cap_t *lc;
 #endif
 
 static int is_child = 0;
 static int in_chroot = 0;
 
 /* File containing userauth info, if ExposeAuthInfo set */
 static char *auth_info_file = NULL;
 
 /* Name and directory of socket for authentication agent forwarding. */
 static char *auth_sock_name = NULL;
 static char *auth_sock_dir = NULL;
 
 /* removes the agent forwarding socket */
 
 static void
 auth_sock_cleanup_proc(struct passwd *pw)
 {
 	if (auth_sock_name != NULL) {
 		temporarily_use_uid(pw);
 		unlink(auth_sock_name);
 		rmdir(auth_sock_dir);
 		auth_sock_name = NULL;
 		restore_uid();
 	}
 }
 
 static int
 auth_input_request_forwarding(struct ssh *ssh, struct passwd * pw)
 {
 	Channel *nc;
 	int sock = -1;
 
 	if (auth_sock_name != NULL) {
 		error("authentication forwarding requested twice.");
 		return 0;
 	}
 
 	/* Temporarily drop privileged uid for mkdir/bind. */
 	temporarily_use_uid(pw);
 
 	/* Allocate a buffer for the socket name, and format the name. */
 	auth_sock_dir = xstrdup("/tmp/ssh-XXXXXXXXXX");
 
 	/* Create private directory for socket */
 	if (mkdtemp(auth_sock_dir) == NULL) {
 		ssh_packet_send_debug(ssh, "Agent forwarding disabled: "
 		    "mkdtemp() failed: %.100s", strerror(errno));
 		restore_uid();
 		free(auth_sock_dir);
 		auth_sock_dir = NULL;
 		goto authsock_err;
 	}
 
 	xasprintf(&auth_sock_name, "%s/agent.%ld",
 	    auth_sock_dir, (long) getpid());
 
 	/* Start a Unix listener on auth_sock_name. */
 	sock = unix_listener(auth_sock_name, SSH_LISTEN_BACKLOG, 0);
 
 	/* Restore the privileged uid. */
 	restore_uid();
 
 	/* Check for socket/bind/listen failure. */
 	if (sock < 0)
 		goto authsock_err;
 
 	/* Allocate a channel for the authentication agent socket. */
 	nc = channel_new(ssh, "auth-listener",
 	    SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1,
 	    CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
 	    0, "auth socket", 1);
 	nc->path = xstrdup(auth_sock_name);
 	return 1;
 
  authsock_err:
 	free(auth_sock_name);
 	if (auth_sock_dir != NULL) {
 		temporarily_use_uid(pw);
 		rmdir(auth_sock_dir);
 		restore_uid();
 		free(auth_sock_dir);
 	}
 	if (sock != -1)
 		close(sock);
 	auth_sock_name = NULL;
 	auth_sock_dir = NULL;
 	return 0;
 }
 
 static void
 display_loginmsg(void)
 {
 	int r;
 
 	if (sshbuf_len(loginmsg) == 0)
 		return;
 	if ((r = sshbuf_put_u8(loginmsg, 0)) != 0)
 		fatal_fr(r, "sshbuf_put_u8");
 	printf("%s", (char *)sshbuf_ptr(loginmsg));
 	sshbuf_reset(loginmsg);
 }
 
 static void
 prepare_auth_info_file(struct passwd *pw, struct sshbuf *info)
 {
 	int fd = -1, success = 0;
 
 	if (!options.expose_userauth_info || info == NULL)
 		return;
 
 	temporarily_use_uid(pw);
 	auth_info_file = xstrdup("/tmp/sshauth.XXXXXXXXXXXXXXX");
 	if ((fd = mkstemp(auth_info_file)) == -1) {
 		error_f("mkstemp: %s", strerror(errno));
 		goto out;
 	}
 	if (atomicio(vwrite, fd, sshbuf_mutable_ptr(info),
 	    sshbuf_len(info)) != sshbuf_len(info)) {
 		error_f("write: %s", strerror(errno));
 		goto out;
 	}
 	if (close(fd) != 0) {
 		error_f("close: %s", strerror(errno));
 		goto out;
 	}
 	success = 1;
  out:
 	if (!success) {
 		if (fd != -1)
 			close(fd);
 		free(auth_info_file);
 		auth_info_file = NULL;
 	}
 	restore_uid();
 }
 
 static void
 set_fwdpermit_from_authopts(struct ssh *ssh, const struct sshauthopt *opts)
 {
 	char *tmp, *cp, *host;
 	int port;
 	size_t i;
 
 	if ((options.allow_tcp_forwarding & FORWARD_LOCAL) != 0) {
 		channel_clear_permission(ssh, FORWARD_USER, FORWARD_LOCAL);
 		for (i = 0; i < auth_opts->npermitopen; i++) {
 			tmp = cp = xstrdup(auth_opts->permitopen[i]);
 			/* This shouldn't fail as it has already been checked */
 			if ((host = hpdelim2(&cp, NULL)) == NULL)
 				fatal_f("internal error: hpdelim");
 			host = cleanhostname(host);
 			if (cp == NULL || (port = permitopen_port(cp)) < 0)
 				fatal_f("internal error: permitopen port");
 			channel_add_permission(ssh,
 			    FORWARD_USER, FORWARD_LOCAL, host, port);
 			free(tmp);
 		}
 	}
 	if ((options.allow_tcp_forwarding & FORWARD_REMOTE) != 0) {
 		channel_clear_permission(ssh, FORWARD_USER, FORWARD_REMOTE);
 		for (i = 0; i < auth_opts->npermitlisten; i++) {
 			tmp = cp = xstrdup(auth_opts->permitlisten[i]);
 			/* This shouldn't fail as it has already been checked */
 			if ((host = hpdelim(&cp)) == NULL)
 				fatal_f("internal error: hpdelim");
 			host = cleanhostname(host);
 			if (cp == NULL || (port = permitopen_port(cp)) < 0)
 				fatal_f("internal error: permitlisten port");
 			channel_add_permission(ssh,
 			    FORWARD_USER, FORWARD_REMOTE, host, port);
 			free(tmp);
 		}
 	}
 }
 
 void
 do_authenticated(struct ssh *ssh, Authctxt *authctxt)
 {
 	setproctitle("%s", authctxt->pw->pw_name);
 
 	auth_log_authopts("active", auth_opts, 0);
 
 	/* setup the channel layer */
 	/* XXX - streamlocal? */
 	set_fwdpermit_from_authopts(ssh, auth_opts);
 
 	if (!auth_opts->permit_port_forwarding_flag ||
 	    options.disable_forwarding) {
 		channel_disable_admin(ssh, FORWARD_LOCAL);
 		channel_disable_admin(ssh, FORWARD_REMOTE);
 	} else {
 		if ((options.allow_tcp_forwarding & FORWARD_LOCAL) == 0)
 			channel_disable_admin(ssh, FORWARD_LOCAL);
 		else
 			channel_permit_all(ssh, FORWARD_LOCAL);
 		if ((options.allow_tcp_forwarding & FORWARD_REMOTE) == 0)
 			channel_disable_admin(ssh, FORWARD_REMOTE);
 		else
 			channel_permit_all(ssh, FORWARD_REMOTE);
 	}
 	auth_debug_send(ssh);
 
 	prepare_auth_info_file(authctxt->pw, authctxt->session_info);
 
 	do_authenticated2(ssh, authctxt);
 
 	do_cleanup(ssh, authctxt);
 }
 
 /* Check untrusted xauth strings for metacharacters */
 static int
 xauth_valid_string(const char *s)
 {
 	size_t i;
 
 	for (i = 0; s[i] != '\0'; i++) {
 		if (!isalnum((u_char)s[i]) &&
 		    s[i] != '.' && s[i] != ':' && s[i] != '/' &&
 		    s[i] != '-' && s[i] != '_')
 			return 0;
 	}
 	return 1;
 }
 
 #define USE_PIPES 1
 /*
  * This is called to fork and execute a command when we have no tty.  This
  * will call do_child from the child, and server_loop from the parent after
  * setting up file descriptors and such.
  */
 int
 do_exec_no_pty(struct ssh *ssh, Session *s, const char *command)
 {
 	pid_t pid;
 #ifdef USE_PIPES
 	int pin[2], pout[2], perr[2];
 
 	if (s == NULL)
 		fatal("do_exec_no_pty: no session");
 
 	/* Allocate pipes for communicating with the program. */
 	if (pipe(pin) == -1) {
 		error_f("pipe in: %.100s", strerror(errno));
 		return -1;
 	}
 	if (pipe(pout) == -1) {
 		error_f("pipe out: %.100s", strerror(errno));
 		close(pin[0]);
 		close(pin[1]);
 		return -1;
 	}
 	if (pipe(perr) == -1) {
 		error_f("pipe err: %.100s", strerror(errno));
 		close(pin[0]);
 		close(pin[1]);
 		close(pout[0]);
 		close(pout[1]);
 		return -1;
 	}
 #else
 	int inout[2], err[2];
 
 	if (s == NULL)
 		fatal("do_exec_no_pty: no session");
 
 	/* Uses socket pairs to communicate with the program. */
 	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) {
 		error_f("socketpair #1: %.100s", strerror(errno));
 		return -1;
 	}
 	if (socketpair(AF_UNIX, SOCK_STREAM, 0, err) == -1) {
 		error_f("socketpair #2: %.100s", strerror(errno));
 		close(inout[0]);
 		close(inout[1]);
 		return -1;
 	}
 #endif
 
 	session_proctitle(s);
 
 	/* Fork the child. */
 	switch ((pid = fork())) {
 	case -1:
 		error_f("fork: %.100s", strerror(errno));
 #ifdef USE_PIPES
 		close(pin[0]);
 		close(pin[1]);
 		close(pout[0]);
 		close(pout[1]);
 		close(perr[0]);
 		close(perr[1]);
 #else
 		close(inout[0]);
 		close(inout[1]);
 		close(err[0]);
 		close(err[1]);
 #endif
 		return -1;
 	case 0:
 		is_child = 1;
 
 		/*
 		 * Create a new session and process group since the 4.4BSD
 		 * setlogin() affects the entire process group.
 		 */
 		if (setsid() == -1)
 			error("setsid failed: %.100s", strerror(errno));
 
 #ifdef USE_PIPES
 		/*
 		 * Redirect stdin.  We close the parent side of the socket
 		 * pair, and make the child side the standard input.
 		 */
 		close(pin[1]);
 		if (dup2(pin[0], 0) == -1)
 			perror("dup2 stdin");
 		close(pin[0]);
 
 		/* Redirect stdout. */
 		close(pout[0]);
 		if (dup2(pout[1], 1) == -1)
 			perror("dup2 stdout");
 		close(pout[1]);
 
 		/* Redirect stderr. */
 		close(perr[0]);
 		if (dup2(perr[1], 2) == -1)
 			perror("dup2 stderr");
 		close(perr[1]);
 #else
 		/*
 		 * Redirect stdin, stdout, and stderr.  Stdin and stdout will
 		 * use the same socket, as some programs (particularly rdist)
 		 * seem to depend on it.
 		 */
 		close(inout[1]);
 		close(err[1]);
 		if (dup2(inout[0], 0) == -1)	/* stdin */
 			perror("dup2 stdin");
 		if (dup2(inout[0], 1) == -1)	/* stdout (same as stdin) */
 			perror("dup2 stdout");
 		close(inout[0]);
 		if (dup2(err[0], 2) == -1)	/* stderr */
 			perror("dup2 stderr");
 		close(err[0]);
 #endif
 
 		/* Do processing for the child (exec command etc). */
 		do_child(ssh, s, command);
 		/* NOTREACHED */
 	default:
 		break;
 	}
 
 #ifdef HAVE_CYGWIN
 	cygwin_set_impersonation_token(INVALID_HANDLE_VALUE);
 #endif
 
 	s->pid = pid;
 	/* Set interactive/non-interactive mode. */
 	ssh_packet_set_interactive(ssh, s->display != NULL,
 	    options.ip_qos_interactive, options.ip_qos_bulk);
 
 	/*
 	 * Clear loginmsg, since it's the child's responsibility to display
 	 * it to the user, otherwise multiple sessions may accumulate
 	 * multiple copies of the login messages.
 	 */
 	sshbuf_reset(loginmsg);
 
 #ifdef USE_PIPES
 	/* We are the parent.  Close the child sides of the pipes. */
 	close(pin[0]);
 	close(pout[1]);
 	close(perr[1]);
 
 	session_set_fds(ssh, s, pin[1], pout[0], perr[0],
 	    s->is_subsystem, 0);
 #else
 	/* We are the parent.  Close the child sides of the socket pairs. */
 	close(inout[0]);
 	close(err[0]);
 
 	/*
 	 * Enter the interactive session.  Note: server_loop must be able to
 	 * handle the case that fdin and fdout are the same.
 	 */
 	session_set_fds(ssh, s, inout[1], inout[1], err[1],
 	    s->is_subsystem, 0);
 #endif
 	return 0;
 }
 
 /*
  * This is called to fork and execute a command when we have a tty.  This
  * will call do_child from the child, and server_loop from the parent after
  * setting up file descriptors, controlling tty, updating wtmp, utmp,
  * lastlog, and other such operations.
  */
 int
 do_exec_pty(struct ssh *ssh, Session *s, const char *command)
 {
 	int fdout, ptyfd, ttyfd, ptymaster;
 	pid_t pid;
 
 	if (s == NULL)
 		fatal("do_exec_pty: no session");
 	ptyfd = s->ptyfd;
 	ttyfd = s->ttyfd;
 
 	/*
 	 * Create another descriptor of the pty master side for use as the
 	 * standard input.  We could use the original descriptor, but this
 	 * simplifies code in server_loop.  The descriptor is bidirectional.
 	 * Do this before forking (and cleanup in the child) so as to
 	 * detect and gracefully fail out-of-fd conditions.
 	 */
 	if ((fdout = dup(ptyfd)) == -1) {
 		error_f("dup #1: %s", strerror(errno));
 		close(ttyfd);
 		close(ptyfd);
 		return -1;
 	}
 	/* we keep a reference to the pty master */
 	if ((ptymaster = dup(ptyfd)) == -1) {
 		error_f("dup #2: %s", strerror(errno));
 		close(ttyfd);
 		close(ptyfd);
 		close(fdout);
 		return -1;
 	}
 
 	/* Fork the child. */
 	switch ((pid = fork())) {
 	case -1:
 		error_f("fork: %.100s", strerror(errno));
 		close(fdout);
 		close(ptymaster);
 		close(ttyfd);
 		close(ptyfd);
 		return -1;
 	case 0:
 		is_child = 1;
 
 		close(fdout);
 		close(ptymaster);
 
 		/* Close the master side of the pseudo tty. */
 		close(ptyfd);
 
 		/* Make the pseudo tty our controlling tty. */
 		pty_make_controlling_tty(&ttyfd, s->tty);
 
 		/* Redirect stdin/stdout/stderr from the pseudo tty. */
 		if (dup2(ttyfd, 0) == -1)
 			error("dup2 stdin: %s", strerror(errno));
 		if (dup2(ttyfd, 1) == -1)
 			error("dup2 stdout: %s", strerror(errno));
 		if (dup2(ttyfd, 2) == -1)
 			error("dup2 stderr: %s", strerror(errno));
 
 		/* Close the extra descriptor for the pseudo tty. */
 		close(ttyfd);
 
 		/* record login, etc. similar to login(1) */
 #ifndef HAVE_OSF_SIA
 		do_login(ssh, s, command);
 #endif
 		/*
 		 * Do common processing for the child, such as execing
 		 * the command.
 		 */
 		do_child(ssh, s, command);
 		/* NOTREACHED */
 	default:
 		break;
 	}
 
 #ifdef HAVE_CYGWIN
 	cygwin_set_impersonation_token(INVALID_HANDLE_VALUE);
 #endif
 
 	s->pid = pid;
 
 	/* Parent.  Close the slave side of the pseudo tty. */
 	close(ttyfd);
 
 	/* Enter interactive session. */
 	s->ptymaster = ptymaster;
 	ssh_packet_set_interactive(ssh, 1,
 	    options.ip_qos_interactive, options.ip_qos_bulk);
 	session_set_fds(ssh, s, ptyfd, fdout, -1, 1, 1);
 	return 0;
 }
 
 /*
  * This is called to fork and execute a command.  If another command is
  * to be forced, execute that instead.
  */
 int
 do_exec(struct ssh *ssh, Session *s, const char *command)
 {
 	int ret;
 	const char *forced = NULL, *tty = NULL;
 	char session_type[1024];
 
 	if (options.adm_forced_command) {
 		original_command = command;
 		command = options.adm_forced_command;
 		forced = "(config)";
 	} else if (auth_opts->force_command != NULL) {
 		original_command = command;
 		command = auth_opts->force_command;
 		forced = "(key-option)";
 	}
 	s->forced = 0;
 	if (forced != NULL) {
 		s->forced = 1;
 		if (IS_INTERNAL_SFTP(command)) {
 			s->is_subsystem = s->is_subsystem ?
 			    SUBSYSTEM_INT_SFTP : SUBSYSTEM_INT_SFTP_ERROR;
 		} else if (s->is_subsystem)
 			s->is_subsystem = SUBSYSTEM_EXT;
 		snprintf(session_type, sizeof(session_type),
 		    "forced-command %s '%.900s'", forced, command);
 	} else if (s->is_subsystem) {
 		snprintf(session_type, sizeof(session_type),
 		    "subsystem '%.900s'", s->subsys);
 	} else if (command == NULL) {
 		snprintf(session_type, sizeof(session_type), "shell");
 	} else {
 		/* NB. we don't log unforced commands to preserve privacy */
 		snprintf(session_type, sizeof(session_type), "command");
 	}
 
 	if (s->ttyfd != -1) {
 		tty = s->tty;
 		if (strncmp(tty, "/dev/", 5) == 0)
 			tty += 5;
 	}
 
 	verbose("Starting session: %s%s%s for %s from %.200s port %d id %d",
 	    session_type,
 	    tty == NULL ? "" : " on ",
 	    tty == NULL ? "" : tty,
 	    s->pw->pw_name,
 	    ssh_remote_ipaddr(ssh),
 	    ssh_remote_port(ssh),
 	    s->self);
 
 #ifdef SSH_AUDIT_EVENTS
 	if (command != NULL)
 		PRIVSEP(audit_run_command(command));
 	else if (s->ttyfd == -1) {
 		char *shell = s->pw->pw_shell;
 
 		if (shell[0] == '\0')	/* empty shell means /bin/sh */
 			shell =_PATH_BSHELL;
 		PRIVSEP(audit_run_command(shell));
 	}
 #endif
 	if (s->ttyfd != -1)
 		ret = do_exec_pty(ssh, s, command);
 	else
 		ret = do_exec_no_pty(ssh, s, command);
 
 	original_command = NULL;
 
 	/*
 	 * Clear loginmsg: it's the child's responsibility to display
 	 * it to the user, otherwise multiple sessions may accumulate
 	 * multiple copies of the login messages.
 	 */
 	sshbuf_reset(loginmsg);
 
 	return ret;
 }
 
 /* administrative, login(1)-like work */
 void
 do_login(struct ssh *ssh, Session *s, const char *command)
 {
 	socklen_t fromlen;
 	struct sockaddr_storage from;
 	struct passwd * pw = s->pw;
 	pid_t pid = getpid();
 
 	/*
 	 * Get IP address of client. If the connection is not a socket, let
 	 * the address be 0.0.0.0.
 	 */
 	memset(&from, 0, sizeof(from));
 	fromlen = sizeof(from);
 	if (ssh_packet_connection_is_on_socket(ssh)) {
 		if (getpeername(ssh_packet_get_connection_in(ssh),
 		    (struct sockaddr *)&from, &fromlen) == -1) {
 			debug("getpeername: %.100s", strerror(errno));
 			cleanup_exit(255);
 		}
 	}
 
 	/* Record that there was a login on that tty from the remote host. */
 	if (!use_privsep)
 		record_login(pid, s->tty, pw->pw_name, pw->pw_uid,
 		    session_get_remote_name_or_ip(ssh, utmp_len,
 		    options.use_dns),
 		    (struct sockaddr *)&from, fromlen);
 
 #ifdef USE_PAM
 	/*
 	 * If password change is needed, do it now.
 	 * This needs to occur before the ~/.hushlogin check.
 	 */
 	if (options.use_pam && !use_privsep && s->authctxt->force_pwchange) {
 		display_loginmsg();
 		do_pam_chauthtok();
 		s->authctxt->force_pwchange = 0;
 		/* XXX - signal [net] parent to enable forwardings */
 	}
 #endif
 
 	if (check_quietlogin(s, command))
 		return;
 
 	display_loginmsg();
 
 	do_motd();
 }
 
 /*
  * Display the message of the day.
  */
 void
 do_motd(void)
 {
 	FILE *f;
 	char buf[256];
 
 	if (options.print_motd) {
 #ifdef HAVE_LOGIN_CAP
 		f = fopen(login_getcapstr(lc, "welcome", "/etc/motd",
 		    "/etc/motd"), "r");
 #else
 		f = fopen("/etc/motd", "r");
 #endif
 		if (f) {
 			while (fgets(buf, sizeof(buf), f))
 				fputs(buf, stdout);
 			fclose(f);
 		}
 	}
 }
 
 
 /*
  * Check for quiet login, either .hushlogin or command given.
  */
 int
 check_quietlogin(Session *s, const char *command)
 {
 	char buf[256];
 	struct passwd *pw = s->pw;
 	struct stat st;
 
 	/* Return 1 if .hushlogin exists or a command given. */
 	if (command != NULL)
 		return 1;
 	snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir);
 #ifdef HAVE_LOGIN_CAP
 	if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0)
 		return 1;
 #else
 	if (stat(buf, &st) >= 0)
 		return 1;
 #endif
 	return 0;
 }
 
 /*
  * Reads environment variables from the given file and adds/overrides them
  * into the environment.  If the file does not exist, this does nothing.
  * Otherwise, it must consist of empty lines, comments (line starts with '#')
  * and assignments of the form name=value.  No other forms are allowed.
  * If allowlist is not NULL, then it is interpreted as a pattern list and
  * only variable names that match it will be accepted.
  */
 static void
 read_environment_file(char ***env, u_int *envsize,
 	const char *filename, const char *allowlist)
 {
 	FILE *f;
 	char *line = NULL, *cp, *value;
 	size_t linesize = 0;
 	u_int lineno = 0;
 
 	f = fopen(filename, "r");
 	if (!f)
 		return;
 
 	while (getline(&line, &linesize, f) != -1) {
 		if (++lineno > 1000)
 			fatal("Too many lines in environment file %s", filename);
 		for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
 			;
 		if (!*cp || *cp == '#' || *cp == '\n')
 			continue;
 
 		cp[strcspn(cp, "\n")] = '\0';
 
 		value = strchr(cp, '=');
 		if (value == NULL) {
 			fprintf(stderr, "Bad line %u in %.100s\n", lineno,
 			    filename);
 			continue;
 		}
 		/*
 		 * Replace the equals sign by nul, and advance value to
 		 * the value string.
 		 */
 		*value = '\0';
 		value++;
 		if (allowlist != NULL &&
 		    match_pattern_list(cp, allowlist, 0) != 1)
 			continue;
 		child_set_env(env, envsize, cp, value);
 	}
 	free(line);
 	fclose(f);
 }
 
 #ifdef HAVE_ETC_DEFAULT_LOGIN
 /*
  * Return named variable from specified environment, or NULL if not present.
  */
 static char *
 child_get_env(char **env, const char *name)
 {
 	int i;
 	size_t len;
 
 	len = strlen(name);
 	for (i=0; env[i] != NULL; i++)
 		if (strncmp(name, env[i], len) == 0 && env[i][len] == '=')
 			return(env[i] + len + 1);
 	return NULL;
 }
 
 /*
  * Read /etc/default/login.
  * We pick up the PATH (or SUPATH for root) and UMASK.
  */
 static void
 read_etc_default_login(char ***env, u_int *envsize, uid_t uid)
 {
 	char **tmpenv = NULL, *var;
 	u_int i, tmpenvsize = 0;
 	u_long mask;
 
 	/*
 	 * We don't want to copy the whole file to the child's environment,
 	 * so we use a temporary environment and copy the variables we're
 	 * interested in.
 	 */
 	read_environment_file(&tmpenv, &tmpenvsize, "/etc/default/login",
 	    options.permit_user_env_allowlist);
 
 	if (tmpenv == NULL)
 		return;
 
 	if (uid == 0)
 		var = child_get_env(tmpenv, "SUPATH");
 	else
 		var = child_get_env(tmpenv, "PATH");
 	if (var != NULL)
 		child_set_env(env, envsize, "PATH", var);
 
 	if ((var = child_get_env(tmpenv, "UMASK")) != NULL)
 		if (sscanf(var, "%5lo", &mask) == 1)
 			umask((mode_t)mask);
 
 	for (i = 0; tmpenv[i] != NULL; i++)
 		free(tmpenv[i]);
 	free(tmpenv);
 }
 #endif /* HAVE_ETC_DEFAULT_LOGIN */
 
 #if defined(USE_PAM) || defined(HAVE_CYGWIN)
 static void
 copy_environment_denylist(char **source, char ***env, u_int *envsize,
     const char *denylist)
 {
 	char *var_name, *var_val;
 	int i;
 
 	if (source == NULL)
 		return;
 
 	for(i = 0; source[i] != NULL; i++) {
 		var_name = xstrdup(source[i]);
 		if ((var_val = strstr(var_name, "=")) == NULL) {
 			free(var_name);
 			continue;
 		}
 		*var_val++ = '\0';
 
 		if (denylist == NULL ||
 		    match_pattern_list(var_name, denylist, 0) != 1) {
 			debug3("Copy environment: %s=%s", var_name, var_val);
 			child_set_env(env, envsize, var_name, var_val);
 		}
 
 		free(var_name);
 	}
 }
 #endif /* defined(USE_PAM) || defined(HAVE_CYGWIN) */
 
 #ifdef HAVE_CYGWIN
 static void
 copy_environment(char **source, char ***env, u_int *envsize)
 {
 	copy_environment_denylist(source, env, envsize, NULL);
 }
 #endif
 
 static char **
 do_setup_env(struct ssh *ssh, Session *s, const char *shell)
 {
 	char buf[256];
 	size_t n;
 	u_int i, envsize;
 	char *ocp, *cp, *value, **env, *laddr;
 	struct passwd *pw = s->pw;
 #if !defined (HAVE_LOGIN_CAP) && !defined (HAVE_CYGWIN)
 	char *path = NULL;
 #endif
 
 	/* Initialize the environment. */
 	envsize = 100;
 	env = xcalloc(envsize, sizeof(char *));
 	env[0] = NULL;
 
 #ifdef HAVE_CYGWIN
 	/*
 	 * The Windows environment contains some setting which are
 	 * important for a running system. They must not be dropped.
 	 */
 	{
 		char **p;
 
 		p = fetch_windows_environment();
 		copy_environment(p, &env, &envsize);
 		free_windows_environment(p);
 	}
 #endif
 
 #ifdef GSSAPI
 	/* Allow any GSSAPI methods that we've used to alter
 	 * the child's environment as they see fit
 	 */
 	ssh_gssapi_do_child(&env, &envsize);
 #endif
 
 	/* Set basic environment. */
 	for (i = 0; i < s->num_env; i++)
 		child_set_env(&env, &envsize, s->env[i].name, s->env[i].val);
 
 	child_set_env(&env, &envsize, "USER", pw->pw_name);
 	child_set_env(&env, &envsize, "LOGNAME", pw->pw_name);
 #ifdef _AIX
 	child_set_env(&env, &envsize, "LOGIN", pw->pw_name);
 #endif
 	child_set_env(&env, &envsize, "HOME", pw->pw_dir);
 #ifdef HAVE_LOGIN_CAP
 	if (setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH) < 0)
 		child_set_env(&env, &envsize, "PATH", _PATH_STDPATH);
 	else
 		child_set_env(&env, &envsize, "PATH", getenv("PATH"));
 #else /* HAVE_LOGIN_CAP */
 # ifndef HAVE_CYGWIN
 	/*
 	 * There's no standard path on Windows. The path contains
 	 * important components pointing to the system directories,
 	 * needed for loading shared libraries. So the path better
 	 * remains intact here.
 	 */
 #  ifdef HAVE_ETC_DEFAULT_LOGIN
 	read_etc_default_login(&env, &envsize, pw->pw_uid);
 	path = child_get_env(env, "PATH");
 #  endif /* HAVE_ETC_DEFAULT_LOGIN */
 	if (path == NULL || *path == '\0') {
 		child_set_env(&env, &envsize, "PATH",
 		    s->pw->pw_uid == 0 ?  SUPERUSER_PATH : _PATH_STDPATH);
 	}
 # endif /* HAVE_CYGWIN */
 #endif /* HAVE_LOGIN_CAP */
 
 	if (!options.use_pam) {
 		snprintf(buf, sizeof buf, "%.200s/%.50s",
 		    _PATH_MAILDIR, pw->pw_name);
 		child_set_env(&env, &envsize, "MAIL", buf);
 	}
 
 	/* Normal systems set SHELL by default. */
 	child_set_env(&env, &envsize, "SHELL", shell);
 
 	if (getenv("TZ"))
 		child_set_env(&env, &envsize, "TZ", getenv("TZ"));
 	if (s->term)
 		child_set_env(&env, &envsize, "TERM", s->term);
 	if (s->display)
 		child_set_env(&env, &envsize, "DISPLAY", s->display);
 
 	/*
 	 * Since we clear KRB5CCNAME at startup, if it's set now then it
 	 * must have been set by a native authentication method (eg AIX or
 	 * SIA), so copy it to the child.
 	 */
 	{
 		char *cp;
 
 		if ((cp = getenv("KRB5CCNAME")) != NULL)
 			child_set_env(&env, &envsize, "KRB5CCNAME", cp);
 	}
 
 #ifdef _AIX
 	{
 		char *cp;
 
 		if ((cp = getenv("AUTHSTATE")) != NULL)
 			child_set_env(&env, &envsize, "AUTHSTATE", cp);
 		read_environment_file(&env, &envsize, "/etc/environment",
 		    options.permit_user_env_allowlist);
 	}
 #endif
 #ifdef KRB5
 	if (s->authctxt->krb5_ccname)
 		child_set_env(&env, &envsize, "KRB5CCNAME",
 		    s->authctxt->krb5_ccname);
 #endif
 	if (auth_sock_name != NULL)
 		child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME,
 		    auth_sock_name);
 
 
 	/* Set custom environment options from pubkey authentication. */
 	if (options.permit_user_env) {
 		for (n = 0 ; n < auth_opts->nenv; n++) {
 			ocp = xstrdup(auth_opts->env[n]);
 			cp = strchr(ocp, '=');
 			if (cp != NULL) {
 				*cp = '\0';
 				/* Apply PermitUserEnvironment allowlist */
 				if (options.permit_user_env_allowlist == NULL ||
 				    match_pattern_list(ocp,
 				    options.permit_user_env_allowlist, 0) == 1)
 					child_set_env(&env, &envsize,
 					    ocp, cp + 1);
 			}
 			free(ocp);
 		}
 	}
 
 	/* read $HOME/.ssh/environment. */
 	if (options.permit_user_env) {
 		snprintf(buf, sizeof buf, "%.200s/%s/environment",
 		    pw->pw_dir, _PATH_SSH_USER_DIR);
 		read_environment_file(&env, &envsize, buf,
 		    options.permit_user_env_allowlist);
 	}
 
 #ifdef USE_PAM
 	/*
 	 * Pull in any environment variables that may have
 	 * been set by PAM.
 	 */
 	if (options.use_pam) {
 		char **p;
 
 		/*
 		 * Don't allow PAM-internal env vars to leak
 		 * back into the session environment.
 		 */
 #define PAM_ENV_DENYLIST  "SSH_AUTH_INFO*,SSH_CONNECTION*"
 		p = fetch_pam_child_environment();
 		copy_environment_denylist(p, &env, &envsize,
 		    PAM_ENV_DENYLIST);
 		free_pam_environment(p);
 
 		p = fetch_pam_environment();
 		copy_environment_denylist(p, &env, &envsize,
 		    PAM_ENV_DENYLIST);
 		free_pam_environment(p);
 	}
 #endif /* USE_PAM */
 
 	/* Environment specified by admin */
 	for (i = 0; i < options.num_setenv; i++) {
 		cp = xstrdup(options.setenv[i]);
 		if ((value = strchr(cp, '=')) == NULL) {
 			/* shouldn't happen; vars are checked in servconf.c */
 			fatal("Invalid config SetEnv: %s", options.setenv[i]);
 		}
 		*value++ = '\0';
 		child_set_env(&env, &envsize, cp, value);
 		free(cp);
 	}
 
 	/* SSH_CLIENT deprecated */
 	snprintf(buf, sizeof buf, "%.50s %d %d",
 	    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 	    ssh_local_port(ssh));
 	child_set_env(&env, &envsize, "SSH_CLIENT", buf);
 
 	laddr = get_local_ipaddr(ssh_packet_get_connection_in(ssh));
 	snprintf(buf, sizeof buf, "%.50s %d %.50s %d",
 	    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 	    laddr, ssh_local_port(ssh));
 	free(laddr);
 	child_set_env(&env, &envsize, "SSH_CONNECTION", buf);
 
 	if (tun_fwd_ifnames != NULL)
 		child_set_env(&env, &envsize, "SSH_TUNNEL", tun_fwd_ifnames);
 	if (auth_info_file != NULL)
 		child_set_env(&env, &envsize, "SSH_USER_AUTH", auth_info_file);
 	if (s->ttyfd != -1)
 		child_set_env(&env, &envsize, "SSH_TTY", s->tty);
 	if (original_command)
 		child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND",
 		    original_command);
 
 	if (debug_flag) {
 		/* dump the environment */
 		fprintf(stderr, "Environment:\n");
 		for (i = 0; env[i]; i++)
 			fprintf(stderr, "  %.200s\n", env[i]);
 	}
 	return env;
 }
 
 /*
  * Run $HOME/.ssh/rc, /etc/ssh/sshrc, or xauth (whichever is found
  * first in this order).
  */
 static void
 do_rc_files(struct ssh *ssh, Session *s, const char *shell)
 {
 	FILE *f = NULL;
 	char *cmd = NULL, *user_rc = NULL;
 	int do_xauth;
 	struct stat st;
 
 	do_xauth =
 	    s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL;
 	xasprintf(&user_rc, "%s/%s", s->pw->pw_dir, _PATH_SSH_USER_RC);
 
 	/* ignore _PATH_SSH_USER_RC for subsystems and admin forced commands */
 	if (!s->is_subsystem && options.adm_forced_command == NULL &&
 	    auth_opts->permit_user_rc && options.permit_user_rc &&
 	    stat(user_rc, &st) >= 0) {
 		if (xasprintf(&cmd, "%s -c '%s %s'", shell, _PATH_BSHELL,
 		    user_rc) == -1)
 			fatal_f("xasprintf: %s", strerror(errno));
 		if (debug_flag)
 			fprintf(stderr, "Running %s\n", cmd);
 		f = popen(cmd, "w");
 		if (f) {
 			if (do_xauth)
 				fprintf(f, "%s %s\n", s->auth_proto,
 				    s->auth_data);
 			pclose(f);
 		} else
 			fprintf(stderr, "Could not run %s\n",
 			    user_rc);
 	} else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) {
 		if (debug_flag)
 			fprintf(stderr, "Running %s %s\n", _PATH_BSHELL,
 			    _PATH_SSH_SYSTEM_RC);
 		f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w");
 		if (f) {
 			if (do_xauth)
 				fprintf(f, "%s %s\n", s->auth_proto,
 				    s->auth_data);
 			pclose(f);
 		} else
 			fprintf(stderr, "Could not run %s\n",
 			    _PATH_SSH_SYSTEM_RC);
 	} else if (do_xauth && options.xauth_location != NULL) {
 		/* Add authority data to .Xauthority if appropriate. */
 		if (debug_flag) {
 			fprintf(stderr,
 			    "Running %.500s remove %.100s\n",
 			    options.xauth_location, s->auth_display);
 			fprintf(stderr,
 			    "%.500s add %.100s %.100s %.100s\n",
 			    options.xauth_location, s->auth_display,
 			    s->auth_proto, s->auth_data);
 		}
 		if (xasprintf(&cmd, "%s -q -", options.xauth_location) == -1)
 			fatal_f("xasprintf: %s", strerror(errno));
 		f = popen(cmd, "w");
 		if (f) {
 			fprintf(f, "remove %s\n",
 			    s->auth_display);
 			fprintf(f, "add %s %s %s\n",
 			    s->auth_display, s->auth_proto,
 			    s->auth_data);
 			pclose(f);
 		} else {
 			fprintf(stderr, "Could not run %s\n",
 			    cmd);
 		}
 	}
 	free(cmd);
 	free(user_rc);
 }
 
 static void
 do_nologin(struct passwd *pw)
 {
 	FILE *f = NULL;
 	char buf[1024], *nl, *def_nl = _PATH_NOLOGIN;
 	struct stat sb;
 
 #ifdef HAVE_LOGIN_CAP
 	if (login_getcapbool(lc, "ignorenologin", 0) || pw->pw_uid == 0)
 		return;
 	nl = login_getcapstr(lc, "nologin", def_nl, def_nl);
 #else
 	if (pw->pw_uid == 0)
 		return;
 	nl = def_nl;
 #endif
 	if (stat(nl, &sb) == -1)
 		return;
 
 	/* /etc/nologin exists.  Print its contents if we can and exit. */
 	logit("User %.100s not allowed because %s exists", pw->pw_name, nl);
 	if ((f = fopen(nl, "r")) != NULL) {
 		while (fgets(buf, sizeof(buf), f))
 			fputs(buf, stderr);
 		fclose(f);
 	}
 	exit(254);
 }
 
 /*
  * Chroot into a directory after checking it for safety: all path components
  * must be root-owned directories with strict permissions.
  */
 static void
 safely_chroot(const char *path, uid_t uid)
 {
 	const char *cp;
 	char component[PATH_MAX];
 	struct stat st;
 
 	if (!path_absolute(path))
 		fatal("chroot path does not begin at root");
 	if (strlen(path) >= sizeof(component))
 		fatal("chroot path too long");
 
 	/*
 	 * Descend the path, checking that each component is a
 	 * root-owned directory with strict permissions.
 	 */
 	for (cp = path; cp != NULL;) {
 		if ((cp = strchr(cp, '/')) == NULL)
 			strlcpy(component, path, sizeof(component));
 		else {
 			cp++;
 			memcpy(component, path, cp - path);
 			component[cp - path] = '\0';
 		}
-	
+
 		debug3_f("checking '%s'", component);
 
 		if (stat(component, &st) != 0)
 			fatal_f("stat(\"%s\"): %s",
 			    component, strerror(errno));
 		if (st.st_uid != 0 || (st.st_mode & 022) != 0)
 			fatal("bad ownership or modes for chroot "
 			    "directory %s\"%s\"",
 			    cp == NULL ? "" : "component ", component);
 		if (!S_ISDIR(st.st_mode))
 			fatal("chroot path %s\"%s\" is not a directory",
 			    cp == NULL ? "" : "component ", component);
 
 	}
 
 	if (chdir(path) == -1)
 		fatal("Unable to chdir to chroot path \"%s\": "
 		    "%s", path, strerror(errno));
 	if (chroot(path) == -1)
 		fatal("chroot(\"%s\"): %s", path, strerror(errno));
 	if (chdir("/") == -1)
 		fatal_f("chdir(/) after chroot: %s", strerror(errno));
 	verbose("Changed root directory to \"%s\"", path);
 }
 
 /* Set login name, uid, gid, and groups. */
 void
 do_setusercontext(struct passwd *pw)
 {
 	char uidstr[32], *chroot_path, *tmp;
 
 	platform_setusercontext(pw);
 
 	if (platform_privileged_uidswap()) {
 #ifdef HAVE_LOGIN_CAP
 		if (setusercontext(lc, pw, pw->pw_uid,
 		    (LOGIN_SETALL & ~(LOGIN_SETPATH|LOGIN_SETUSER))) < 0) {
 			perror("unable to set user context");
 			exit(1);
 		}
 #else
 		if (setlogin(pw->pw_name) < 0)
 			error("setlogin failed: %s", strerror(errno));
 		if (setgid(pw->pw_gid) < 0) {
 			perror("setgid");
 			exit(1);
 		}
 		/* Initialize the group list. */
 		if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
 			perror("initgroups");
 			exit(1);
 		}
 		endgrent();
 #endif
 
 		platform_setusercontext_post_groups(pw);
 
 		if (!in_chroot && options.chroot_directory != NULL &&
 		    strcasecmp(options.chroot_directory, "none") != 0) {
 			tmp = tilde_expand_filename(options.chroot_directory,
 			    pw->pw_uid);
 			snprintf(uidstr, sizeof(uidstr), "%llu",
 			    (unsigned long long)pw->pw_uid);
 			chroot_path = percent_expand(tmp, "h", pw->pw_dir,
 			    "u", pw->pw_name, "U", uidstr, (char *)NULL);
 			safely_chroot(chroot_path, pw->pw_uid);
 			free(tmp);
 			free(chroot_path);
 			/* Make sure we don't attempt to chroot again */
 			free(options.chroot_directory);
 			options.chroot_directory = NULL;
 			in_chroot = 1;
 		}
 
 #ifdef HAVE_LOGIN_CAP
 		if (setusercontext(lc, pw, pw->pw_uid, LOGIN_SETUSER) < 0) {
 			perror("unable to set user context (setuser)");
 			exit(1);
 		}
 		/* 
 		 * FreeBSD's setusercontext() will not apply the user's
 		 * own umask setting unless running with the user's UID.
 		 */
 		(void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETUMASK);
 #else
 # ifdef USE_LIBIAF
 		/*
 		 * In a chroot environment, the set_id() will always fail;
 		 * typically because of the lack of necessary authentication
 		 * services and runtime such as ./usr/lib/libiaf.so,
 		 * ./usr/lib/libpam.so.1, and ./etc/passwd We skip it in the
 		 * internal sftp chroot case.  We'll lose auditing and ACLs but
 		 * permanently_set_uid will take care of the rest.
 		 */
 		if (!in_chroot && set_id(pw->pw_name) != 0)
 			fatal("set_id(%s) Failed", pw->pw_name);
 # endif /* USE_LIBIAF */
 		/* Permanently switch to the desired uid. */
 		permanently_set_uid(pw);
 #endif
 	} else if (options.chroot_directory != NULL &&
 	    strcasecmp(options.chroot_directory, "none") != 0) {
 		fatal("server lacks privileges to chroot to ChrootDirectory");
 	}
 
 	if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
 		fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
 }
 
 static void
 do_pwchange(Session *s)
 {
 	fflush(NULL);
 	fprintf(stderr, "WARNING: Your password has expired.\n");
 	if (s->ttyfd != -1) {
 		fprintf(stderr,
 		    "You must change your password now and login again!\n");
 #ifdef WITH_SELINUX
 		setexeccon(NULL);
 #endif
 #ifdef PASSWD_NEEDS_USERNAME
 		execl(_PATH_PASSWD_PROG, "passwd", s->pw->pw_name,
 		    (char *)NULL);
 #else
 		execl(_PATH_PASSWD_PROG, "passwd", (char *)NULL);
 #endif
 		perror("passwd");
 	} else {
 		fprintf(stderr,
 		    "Password change required but no TTY available.\n");
 	}
 	exit(1);
 }
 
 static void
 child_close_fds(struct ssh *ssh)
 {
 	extern int auth_sock;
 
 	if (auth_sock != -1) {
 		close(auth_sock);
 		auth_sock = -1;
 	}
 
 	if (ssh_packet_get_connection_in(ssh) ==
 	    ssh_packet_get_connection_out(ssh))
 		close(ssh_packet_get_connection_in(ssh));
 	else {
 		close(ssh_packet_get_connection_in(ssh));
 		close(ssh_packet_get_connection_out(ssh));
 	}
 	/*
 	 * Close all descriptors related to channels.  They will still remain
 	 * open in the parent.
 	 */
 	/* XXX better use close-on-exec? -markus */
 	channel_close_all(ssh);
 
 	/*
 	 * Close any extra file descriptors.  Note that there may still be
 	 * descriptors left by system functions.  They will be closed later.
 	 */
 	endpwent();
 
 	/* Stop directing logs to a high-numbered fd before we close it */
 	log_redirect_stderr_to(NULL);
 
 	/*
 	 * Close any extra open file descriptors so that we don't have them
 	 * hanging around in clients.  Note that we want to do this after
 	 * initgroups, because at least on Solaris 2.3 it leaves file
 	 * descriptors open.
 	 */
 	closefrom(STDERR_FILENO + 1);
 }
 
 /*
  * Performs common processing for the child, such as setting up the
  * environment, closing extra file descriptors, setting the user and group
  * ids, and executing the command or shell.
  */
 #define ARGV_MAX 10
 void
 do_child(struct ssh *ssh, Session *s, const char *command)
 {
 	extern char **environ;
 	char **env, *argv[ARGV_MAX], remote_id[512];
 	const char *shell, *shell0;
 	struct passwd *pw = s->pw;
 	int r = 0;
 
 	sshpkt_fmt_connection_id(ssh, remote_id, sizeof(remote_id));
 
 	/* remove hostkey from the child's memory */
 	destroy_sensitive_data();
 	ssh_packet_clear_keys(ssh);
 
 	/* Force a password change */
 	if (s->authctxt->force_pwchange) {
 		do_setusercontext(pw);
 		child_close_fds(ssh);
 		do_pwchange(s);
 		exit(1);
 	}
 
 	/*
 	 * Login(1) does this as well, and it needs uid 0 for the "-h"
 	 * switch, so we let login(1) to this for us.
 	 */
 #ifdef HAVE_OSF_SIA
 	session_setup_sia(pw, s->ttyfd == -1 ? NULL : s->tty);
 	if (!check_quietlogin(s, command))
 		do_motd();
 #else /* HAVE_OSF_SIA */
 	/* When PAM is enabled we rely on it to do the nologin check */
 	if (!options.use_pam)
 		do_nologin(pw);
 	do_setusercontext(pw);
 	/*
 	 * PAM session modules in do_setusercontext may have
 	 * generated messages, so if this in an interactive
 	 * login then display them too.
 	 */
 	if (!check_quietlogin(s, command))
 		display_loginmsg();
 #endif /* HAVE_OSF_SIA */
 
 #ifdef USE_PAM
 	if (options.use_pam && !is_pam_session_open()) {
 		debug3("PAM session not opened, exiting");
 		display_loginmsg();
 		exit(254);
 	}
 #endif
 
 	/*
 	 * Get the shell from the password data.  An empty shell field is
 	 * legal, and means /bin/sh.
 	 */
 	shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
 
 	/*
 	 * Make sure $SHELL points to the shell from the password file,
 	 * even if shell is overridden from login.conf
 	 */
 	env = do_setup_env(ssh, s, shell);
 
 #ifdef HAVE_LOGIN_CAP
 	shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
 #endif
 
 	/*
 	 * Close the connection descriptors; note that this is the child, and
 	 * the server will still have the socket open, and it is important
 	 * that we do not shutdown it.  Note that the descriptors cannot be
 	 * closed before building the environment, as we call
 	 * ssh_remote_ipaddr there.
 	 */
 	child_close_fds(ssh);
 
 	/*
 	 * Must take new environment into use so that .ssh/rc,
 	 * /etc/ssh/sshrc and xauth are run in the proper environment.
 	 */
 	environ = env;
 
 #if defined(KRB5) && defined(USE_AFS)
 	/*
 	 * At this point, we check to see if AFS is active and if we have
 	 * a valid Kerberos 5 TGT. If so, it seems like a good idea to see
 	 * if we can (and need to) extend the ticket into an AFS token. If
 	 * we don't do this, we run into potential problems if the user's
 	 * home directory is in AFS and it's not world-readable.
 	 */
 
 	if (options.kerberos_get_afs_token && k_hasafs() &&
 	    (s->authctxt->krb5_ctx != NULL)) {
 		char cell[64];
 
 		debug("Getting AFS token");
 
 		k_setpag();
 
 		if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0)
 			krb5_afslog(s->authctxt->krb5_ctx,
 			    s->authctxt->krb5_fwd_ccache, cell, NULL);
 
 		krb5_afslog_home(s->authctxt->krb5_ctx,
 		    s->authctxt->krb5_fwd_ccache, NULL, NULL, pw->pw_dir);
 	}
 #endif
 
 	/* Change current directory to the user's home directory. */
 	if (chdir(pw->pw_dir) == -1) {
 		/* Suppress missing homedir warning for chroot case */
 #ifdef HAVE_LOGIN_CAP
 		r = login_getcapbool(lc, "requirehome", 0);
 #endif
 		if (r || !in_chroot) {
 			fprintf(stderr, "Could not chdir to home "
 			    "directory %s: %s\n", pw->pw_dir,
 			    strerror(errno));
 		}
 		if (r)
 			exit(1);
 	}
 
 	closefrom(STDERR_FILENO + 1);
 
 	do_rc_files(ssh, s, shell);
 
 	/* restore SIGPIPE for child */
 	ssh_signal(SIGPIPE, SIG_DFL);
 
 	if (s->is_subsystem == SUBSYSTEM_INT_SFTP_ERROR) {
 		error("Connection from %s: refusing non-sftp session",
 		    remote_id);
 		printf("This service allows sftp connections only.\n");
 		fflush(NULL);
 		exit(1);
 	} else if (s->is_subsystem == SUBSYSTEM_INT_SFTP) {
 		extern int optind, optreset;
 		int i;
 		char *p, *args;
 
 		setproctitle("%s@%s", s->pw->pw_name, INTERNAL_SFTP_NAME);
 		args = xstrdup(command ? command : "sftp-server");
 		for (i = 0, (p = strtok(args, " ")); p; (p = strtok(NULL, " ")))
 			if (i < ARGV_MAX - 1)
 				argv[i++] = p;
 		argv[i] = NULL;
 		optind = optreset = 1;
 		__progname = argv[0];
 #ifdef WITH_SELINUX
 		ssh_selinux_change_context("sftpd_t");
 #endif
 		exit(sftp_server_main(i, argv, s->pw));
 	}
 
 	fflush(NULL);
 
 	/* Get the last component of the shell name. */
 	if ((shell0 = strrchr(shell, '/')) != NULL)
 		shell0++;
 	else
 		shell0 = shell;
 
 	/*
 	 * If we have no command, execute the shell.  In this case, the shell
 	 * name to be passed in argv[0] is preceded by '-' to indicate that
 	 * this is a login shell.
 	 */
 	if (!command) {
 		char argv0[256];
 
 		/* Start the shell.  Set initial character to '-'. */
 		argv0[0] = '-';
 
 		if (strlcpy(argv0 + 1, shell0, sizeof(argv0) - 1)
 		    >= sizeof(argv0) - 1) {
 			errno = EINVAL;
 			perror(shell);
 			exit(1);
 		}
 
 		/* Execute the shell. */
 		argv[0] = argv0;
 		argv[1] = NULL;
 		execve(shell, argv, env);
 
 		/* Executing the shell failed. */
 		perror(shell);
 		exit(1);
 	}
 	/*
 	 * Execute the command using the user's shell.  This uses the -c
 	 * option to execute the command.
 	 */
 	argv[0] = (char *) shell0;
 	argv[1] = "-c";
 	argv[2] = (char *) command;
 	argv[3] = NULL;
 	execve(shell, argv, env);
 	perror(shell);
 	exit(1);
 }
 
 void
 session_unused(int id)
 {
 	debug3_f("session id %d unused", id);
 	if (id >= options.max_sessions ||
 	    id >= sessions_nalloc) {
 		fatal_f("insane session id %d (max %d nalloc %d)",
 		    id, options.max_sessions, sessions_nalloc);
 	}
 	memset(&sessions[id], 0, sizeof(*sessions));
 	sessions[id].self = id;
 	sessions[id].used = 0;
 	sessions[id].chanid = -1;
 	sessions[id].ptyfd = -1;
 	sessions[id].ttyfd = -1;
 	sessions[id].ptymaster = -1;
 	sessions[id].x11_chanids = NULL;
 	sessions[id].next_unused = sessions_first_unused;
 	sessions_first_unused = id;
 }
 
 Session *
 session_new(void)
 {
 	Session *s, *tmp;
 
 	if (sessions_first_unused == -1) {
 		if (sessions_nalloc >= options.max_sessions)
 			return NULL;
 		debug2_f("allocate (allocated %d max %d)",
 		    sessions_nalloc, options.max_sessions);
 		tmp = xrecallocarray(sessions, sessions_nalloc,
 		    sessions_nalloc + 1, sizeof(*sessions));
 		if (tmp == NULL) {
 			error_f("cannot allocate %d sessions",
 			    sessions_nalloc + 1);
 			return NULL;
 		}
 		sessions = tmp;
 		session_unused(sessions_nalloc++);
 	}
 
 	if (sessions_first_unused >= sessions_nalloc ||
 	    sessions_first_unused < 0) {
 		fatal_f("insane first_unused %d max %d nalloc %d",
 		    sessions_first_unused, options.max_sessions,
 		    sessions_nalloc);
 	}
 
 	s = &sessions[sessions_first_unused];
 	if (s->used)
 		fatal_f("session %d already used", sessions_first_unused);
 	sessions_first_unused = s->next_unused;
 	s->used = 1;
 	s->next_unused = -1;
 	debug("session_new: session %d", s->self);
 
 	return s;
 }
 
 static void
 session_dump(void)
 {
 	int i;
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 
 		debug("dump: used %d next_unused %d session %d "
 		    "channel %d pid %ld",
 		    s->used,
 		    s->next_unused,
 		    s->self,
 		    s->chanid,
 		    (long)s->pid);
 	}
 }
 
 int
 session_open(Authctxt *authctxt, int chanid)
 {
 	Session *s = session_new();
 	debug("session_open: channel %d", chanid);
 	if (s == NULL) {
 		error("no more sessions");
 		return 0;
 	}
 	s->authctxt = authctxt;
 	s->pw = authctxt->pw;
 	if (s->pw == NULL || !authctxt->valid)
 		fatal("no user for session %d", s->self);
 	debug("session_open: session %d: link with channel %d", s->self, chanid);
 	s->chanid = chanid;
 	return 1;
 }
 
 Session *
 session_by_tty(char *tty)
 {
 	int i;
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used && s->ttyfd != -1 && strcmp(s->tty, tty) == 0) {
 			debug("session_by_tty: session %d tty %s", i, tty);
 			return s;
 		}
 	}
 	debug("session_by_tty: unknown tty %.100s", tty);
 	session_dump();
 	return NULL;
 }
 
 static Session *
 session_by_channel(int id)
 {
 	int i;
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used && s->chanid == id) {
 			debug("session_by_channel: session %d channel %d",
 			    i, id);
 			return s;
 		}
 	}
 	debug("session_by_channel: unknown channel %d", id);
 	session_dump();
 	return NULL;
 }
 
 static Session *
 session_by_x11_channel(int id)
 {
 	int i, j;
 
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 
 		if (s->x11_chanids == NULL || !s->used)
 			continue;
 		for (j = 0; s->x11_chanids[j] != -1; j++) {
 			if (s->x11_chanids[j] == id) {
 				debug("session_by_x11_channel: session %d "
 				    "channel %d", s->self, id);
 				return s;
 			}
 		}
 	}
 	debug("session_by_x11_channel: unknown channel %d", id);
 	session_dump();
 	return NULL;
 }
 
 static Session *
 session_by_pid(pid_t pid)
 {
 	int i;
 	debug("session_by_pid: pid %ld", (long)pid);
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used && s->pid == pid)
 			return s;
 	}
 	error("session_by_pid: unknown pid %ld", (long)pid);
 	session_dump();
 	return NULL;
 }
 
 static int
 session_window_change_req(struct ssh *ssh, Session *s)
 {
 	int r;
 
 	if ((r = sshpkt_get_u32(ssh, &s->col)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->row)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->xpixel)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->ypixel)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 	pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel);
 	return 1;
 }
 
 static int
 session_pty_req(struct ssh *ssh, Session *s)
 {
 	int r;
 
 	if (!auth_opts->permit_pty_flag || !options.permit_tty) {
 		debug("Allocating a pty not permitted for this connection.");
 		return 0;
 	}
 	if (s->ttyfd != -1) {
 		ssh_packet_disconnect(ssh, "Protocol error: you already have a pty.");
 		return 0;
 	}
 
 	if ((r = sshpkt_get_cstring(ssh, &s->term, NULL)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->col)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->row)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->xpixel)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->ypixel)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	if (strcmp(s->term, "") == 0) {
 		free(s->term);
 		s->term = NULL;
 	}
 
 	/* Allocate a pty and open it. */
 	debug("Allocating pty.");
 	if (!PRIVSEP(pty_allocate(&s->ptyfd, &s->ttyfd, s->tty,
 	    sizeof(s->tty)))) {
 		free(s->term);
 		s->term = NULL;
 		s->ptyfd = -1;
 		s->ttyfd = -1;
 		error("session_pty_req: session %d alloc failed", s->self);
 		return 0;
 	}
 	debug("session_pty_req: session %d alloc %s", s->self, s->tty);
 
 	ssh_tty_parse_modes(ssh, s->ttyfd);
 
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	if (!use_privsep)
 		pty_setowner(s->pw, s->tty);
 
 	/* Set window size from the packet. */
 	pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel);
 
 	session_proctitle(s);
 	return 1;
 }
 
 static int
 session_subsystem_req(struct ssh *ssh, Session *s)
 {
 	struct stat st;
 	int r, success = 0;
 	char *prog, *cmd, *type;
 	u_int i;
 
 	if ((r = sshpkt_get_cstring(ssh, &s->subsys, NULL)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 	debug2("subsystem request for %.100s by user %s", s->subsys,
 	    s->pw->pw_name);
 
 	for (i = 0; i < options.num_subsystems; i++) {
 		if (strcmp(s->subsys, options.subsystem_name[i]) == 0) {
 			prog = options.subsystem_command[i];
 			cmd = options.subsystem_args[i];
 			if (strcmp(INTERNAL_SFTP_NAME, prog) == 0) {
 				s->is_subsystem = SUBSYSTEM_INT_SFTP;
 				debug("subsystem: %s", prog);
 			} else {
 				if (stat(prog, &st) == -1)
 					debug("subsystem: cannot stat %s: %s",
 					    prog, strerror(errno));
 				s->is_subsystem = SUBSYSTEM_EXT;
 				debug("subsystem: exec() %s", cmd);
 			}
 			xasprintf(&type, "session:subsystem:%s",
 			    options.subsystem_name[i]);
 			channel_set_xtype(ssh, s->chanid, type);
 			free(type);
 			success = do_exec(ssh, s, cmd) == 0;
 			break;
 		}
 	}
 
 	if (!success)
 		logit("subsystem request for %.100s by user %s failed, "
 		    "subsystem not found", s->subsys, s->pw->pw_name);
 
 	return success;
 }
 
 static int
 session_x11_req(struct ssh *ssh, Session *s)
 {
 	int r, success;
 	u_char single_connection = 0;
 
 	if (s->auth_proto != NULL || s->auth_data != NULL) {
 		error("session_x11_req: session %d: "
 		    "x11 forwarding already active", s->self);
 		return 0;
 	}
 	if ((r = sshpkt_get_u8(ssh, &single_connection)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &s->auth_proto, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &s->auth_data, NULL)) != 0 ||
 	    (r = sshpkt_get_u32(ssh, &s->screen)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	s->single_connection = single_connection;
 
 	if (xauth_valid_string(s->auth_proto) &&
 	    xauth_valid_string(s->auth_data))
 		success = session_setup_x11fwd(ssh, s);
 	else {
 		success = 0;
 		error("Invalid X11 forwarding data");
 	}
 	if (!success) {
 		free(s->auth_proto);
 		free(s->auth_data);
 		s->auth_proto = NULL;
 		s->auth_data = NULL;
 	}
 	return success;
 }
 
 static int
 session_shell_req(struct ssh *ssh, Session *s)
 {
 	int r;
 
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	channel_set_xtype(ssh, s->chanid, "session:shell");
 
 	return do_exec(ssh, s, NULL) == 0;
 }
 
 static int
 session_exec_req(struct ssh *ssh, Session *s)
 {
 	u_int success;
 	int r;
 	char *command = NULL;
 
 	if ((r = sshpkt_get_cstring(ssh, &command, NULL)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	channel_set_xtype(ssh, s->chanid, "session:command");
 
 	success = do_exec(ssh, s, command) == 0;
 	free(command);
 	return success;
 }
 
 static int
 session_break_req(struct ssh *ssh, Session *s)
 {
 	int r;
 
 	if ((r = sshpkt_get_u32(ssh, NULL)) != 0 || /* ignore */
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	if (s->ptymaster == -1 || tcsendbreak(s->ptymaster, 0) == -1)
 		return 0;
 	return 1;
 }
 
 static int
 session_env_req(struct ssh *ssh, Session *s)
 {
 	char *name, *val;
 	u_int i;
 	int r;
 
 	if ((r = sshpkt_get_cstring(ssh, &name, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &val, NULL)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 
 	/* Don't set too many environment variables */
 	if (s->num_env > 128) {
 		debug2("Ignoring env request %s: too many env vars", name);
 		goto fail;
 	}
 
 	for (i = 0; i < options.num_accept_env; i++) {
 		if (match_pattern(name, options.accept_env[i])) {
 			debug2("Setting env %d: %s=%s", s->num_env, name, val);
 			s->env = xrecallocarray(s->env, s->num_env,
 			    s->num_env + 1, sizeof(*s->env));
 			s->env[s->num_env].name = name;
 			s->env[s->num_env].val = val;
 			s->num_env++;
 			return (1);
 		}
 	}
 	debug2("Ignoring env request %s: disallowed name", name);
 
  fail:
 	free(name);
 	free(val);
 	return (0);
 }
 
 /*
  * Conversion of signals from ssh channel request names.
  * Subset of signals from RFC 4254 section 6.10C, with SIGINFO as
  * local extension.
  */
 static int
 name2sig(char *name)
 {
 #define SSH_SIG(x) if (strcmp(name, #x) == 0) return SIG ## x
 	SSH_SIG(HUP);
 	SSH_SIG(INT);
 	SSH_SIG(KILL);
 	SSH_SIG(QUIT);
 	SSH_SIG(TERM);
 	SSH_SIG(USR1);
 	SSH_SIG(USR2);
 #undef	SSH_SIG
 #ifdef SIGINFO
 	if (strcmp(name, "INFO@openssh.com") == 0)
 		return SIGINFO;
 #endif
 	return -1;
 }
 
 static int
 session_signal_req(struct ssh *ssh, Session *s)
 {
 	char *signame = NULL;
 	int r, sig, success = 0;
 
 	if ((r = sshpkt_get_cstring(ssh, &signame, NULL)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0) {
 		error_fr(r, "parse");
 		goto out;
 	}
 	if ((sig = name2sig(signame)) == -1) {
 		error_f("unsupported signal \"%s\"", signame);
 		goto out;
 	}
 	if (s->pid <= 0) {
 		error_f("no pid for session %d", s->self);
 		goto out;
 	}
 	if (s->forced || s->is_subsystem) {
 		error_f("refusing to send signal %s to %s session",
 		    signame, s->forced ? "forced-command" : "subsystem");
 		goto out;
 	}
 	if (!use_privsep || mm_is_monitor()) {
 		error_f("session signalling requires privilege separation");
 		goto out;
 	}
 
 	debug_f("signal %s, killpg(%ld, %d)", signame, (long)s->pid, sig);
 	temporarily_use_uid(s->pw);
 	r = killpg(s->pid, sig);
 	restore_uid();
 	if (r != 0) {
 		error_f("killpg(%ld, %d): %s", (long)s->pid,
 		    sig, strerror(errno));
 		goto out;
 	}
 
 	/* success */
 	success = 1;
  out:
 	free(signame);
 	return success;
 }
 
 static int
 session_auth_agent_req(struct ssh *ssh, Session *s)
 {
 	static int called = 0;
 	int r;
 
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: parse packet", __func__);
 	if (!auth_opts->permit_agent_forwarding_flag ||
 	    !options.allow_agent_forwarding) {
 		debug_f("agent forwarding disabled");
 		return 0;
 	}
 	if (called) {
 		return 0;
 	} else {
 		called = 1;
 		return auth_input_request_forwarding(ssh, s->pw);
 	}
 }
 
 int
 session_input_channel_req(struct ssh *ssh, Channel *c, const char *rtype)
 {
 	int success = 0;
 	Session *s;
 
 	if ((s = session_by_channel(c->self)) == NULL) {
 		logit_f("no session %d req %.100s", c->self, rtype);
 		return 0;
 	}
 	debug_f("session %d req %s", s->self, rtype);
 
 	/*
 	 * a session is in LARVAL state until a shell, a command
 	 * or a subsystem is executed
 	 */
 	if (c->type == SSH_CHANNEL_LARVAL) {
 		if (strcmp(rtype, "shell") == 0) {
 			success = session_shell_req(ssh, s);
 		} else if (strcmp(rtype, "exec") == 0) {
 			success = session_exec_req(ssh, s);
 		} else if (strcmp(rtype, "pty-req") == 0) {
 			success = session_pty_req(ssh, s);
 		} else if (strcmp(rtype, "x11-req") == 0) {
 			success = session_x11_req(ssh, s);
 		} else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) {
 			success = session_auth_agent_req(ssh, s);
 		} else if (strcmp(rtype, "subsystem") == 0) {
 			success = session_subsystem_req(ssh, s);
 		} else if (strcmp(rtype, "env") == 0) {
 			success = session_env_req(ssh, s);
 		}
 	}
 	if (strcmp(rtype, "window-change") == 0) {
 		success = session_window_change_req(ssh, s);
 	} else if (strcmp(rtype, "break") == 0) {
 		success = session_break_req(ssh, s);
 	} else if (strcmp(rtype, "signal") == 0) {
 		success = session_signal_req(ssh, s);
 	}
 
 	return success;
 }
 
 void
 session_set_fds(struct ssh *ssh, Session *s,
     int fdin, int fdout, int fderr, int ignore_fderr, int is_tty)
 {
 	/*
 	 * now that have a child and a pipe to the child,
 	 * we can activate our channel and register the fd's
 	 */
 	if (s->chanid == -1)
 		fatal("no channel for session %d", s->self);
 	channel_set_fds(ssh, s->chanid,
 	    fdout, fdin, fderr,
 	    ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
 	    1, is_tty, CHAN_SES_WINDOW_DEFAULT);
 }
 
 /*
  * Function to perform pty cleanup. Also called if we get aborted abnormally
  * (e.g., due to a dropped connection).
  */
 void
 session_pty_cleanup2(Session *s)
 {
 	if (s == NULL) {
 		error_f("no session");
 		return;
 	}
 	if (s->ttyfd == -1)
 		return;
 
 	debug_f("session %d release %s", s->self, s->tty);
 
 	/* Record that the user has logged out. */
 	if (s->pid != 0)
 		record_logout(s->pid, s->tty, s->pw->pw_name);
 
 	/* Release the pseudo-tty. */
 	if (getuid() == 0)
 		pty_release(s->tty);
 
 	/*
 	 * Close the server side of the socket pairs.  We must do this after
 	 * the pty cleanup, so that another process doesn't get this pty
 	 * while we're still cleaning up.
 	 */
 	if (s->ptymaster != -1 && close(s->ptymaster) == -1)
 		error("close(s->ptymaster/%d): %s",
 		    s->ptymaster, strerror(errno));
 
 	/* unlink pty from session */
 	s->ttyfd = -1;
 }
 
 void
 session_pty_cleanup(Session *s)
 {
 	PRIVSEP(session_pty_cleanup2(s));
 }
 
 static char *
 sig2name(int sig)
 {
 #define SSH_SIG(x) if (sig == SIG ## x) return #x
 	SSH_SIG(ABRT);
 	SSH_SIG(ALRM);
 	SSH_SIG(FPE);
 	SSH_SIG(HUP);
 	SSH_SIG(ILL);
 	SSH_SIG(INT);
 	SSH_SIG(KILL);
 	SSH_SIG(PIPE);
 	SSH_SIG(QUIT);
 	SSH_SIG(SEGV);
 	SSH_SIG(TERM);
 	SSH_SIG(USR1);
 	SSH_SIG(USR2);
 #undef	SSH_SIG
 	return "SIG@openssh.com";
 }
 
 static void
 session_close_x11(struct ssh *ssh, int id)
 {
 	Channel *c;
 
 	if ((c = channel_by_id(ssh, id)) == NULL) {
 		debug_f("x11 channel %d missing", id);
 	} else {
 		/* Detach X11 listener */
 		debug_f("detach x11 channel %d", id);
 		channel_cancel_cleanup(ssh, id);
 		if (c->ostate != CHAN_OUTPUT_CLOSED)
 			chan_mark_dead(ssh, c);
 	}
 }
 
 static void
 session_close_single_x11(struct ssh *ssh, int id, int force, void *arg)
 {
 	Session *s;
 	u_int i;
 
 	debug3_f("channel %d", id);
 	channel_cancel_cleanup(ssh, id);
 	if ((s = session_by_x11_channel(id)) == NULL)
 		fatal_f("no x11 channel %d", id);
 	for (i = 0; s->x11_chanids[i] != -1; i++) {
 		debug_f("session %d: closing channel %d",
 		    s->self, s->x11_chanids[i]);
 		/*
 		 * The channel "id" is already closing, but make sure we
 		 * close all of its siblings.
 		 */
 		if (s->x11_chanids[i] != id)
 			session_close_x11(ssh, s->x11_chanids[i]);
 	}
 	free(s->x11_chanids);
 	s->x11_chanids = NULL;
 	free(s->display);
 	s->display = NULL;
 	free(s->auth_proto);
 	s->auth_proto = NULL;
 	free(s->auth_data);
 	s->auth_data = NULL;
 	free(s->auth_display);
 	s->auth_display = NULL;
 }
 
 static void
 session_exit_message(struct ssh *ssh, Session *s, int status)
 {
 	Channel *c;
 	int r;
 	char *note = NULL;
 
 	if ((c = channel_lookup(ssh, s->chanid)) == NULL)
 		fatal_f("session %d: no channel %d", s->self, s->chanid);
 
 	if (WIFEXITED(status)) {
 		channel_request_start(ssh, s->chanid, "exit-status", 0);
 		if ((r = sshpkt_put_u32(ssh, WEXITSTATUS(status))) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			sshpkt_fatal(ssh, r, "%s: exit reply", __func__);
 		xasprintf(&note, "exit %d", WEXITSTATUS(status));
 	} else if (WIFSIGNALED(status)) {
 		channel_request_start(ssh, s->chanid, "exit-signal", 0);
 #ifndef WCOREDUMP
 # define WCOREDUMP(x) (0)
 #endif
 		if ((r = sshpkt_put_cstring(ssh, sig2name(WTERMSIG(status)))) != 0 ||
 		    (r = sshpkt_put_u8(ssh, WCOREDUMP(status)? 1 : 0)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh, "")) != 0 ||
 		    (r = sshpkt_put_cstring(ssh, "")) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			sshpkt_fatal(ssh, r, "%s: exit reply", __func__);
 		xasprintf(&note, "signal %d%s", WTERMSIG(status),
 		    WCOREDUMP(status) ? " core dumped" : "");
 	} else {
 		/* Some weird exit cause.  Just exit. */
 		ssh_packet_disconnect(ssh, "wait returned status %04x.",
 		    status);
 	}
 
 	debug_f("session %d channel %d pid %ld %s", s->self, s->chanid,
 	    (long)s->pid, note == NULL ? "UNKNOWN" : note);
 	free(note);
 
 	/* disconnect channel */
 	debug_f("release channel %d", s->chanid);
 
 	/*
 	 * Adjust cleanup callback attachment to send close messages when
 	 * the channel gets EOF. The session will be then be closed
 	 * by session_close_by_channel when the child sessions close their fds.
 	 */
 	channel_register_cleanup(ssh, c->self, session_close_by_channel, 1);
 
 	/*
 	 * emulate a write failure with 'chan_write_failed', nobody will be
 	 * interested in data we write.
 	 * Note that we must not call 'chan_read_failed', since there could
 	 * be some more data waiting in the pipe.
 	 */
 	if (c->ostate != CHAN_OUTPUT_CLOSED)
 		chan_write_failed(ssh, c);
 }
 
 void
 session_close(struct ssh *ssh, Session *s)
 {
 	u_int i;
 
 	verbose("Close session: user %s from %.200s port %d id %d",
 	    s->pw->pw_name,
 	    ssh_remote_ipaddr(ssh),
 	    ssh_remote_port(ssh),
 	    s->self);
 
 	if (s->ttyfd != -1)
 		session_pty_cleanup(s);
 	free(s->term);
 	free(s->display);
 	free(s->x11_chanids);
 	free(s->auth_display);
 	free(s->auth_data);
 	free(s->auth_proto);
 	free(s->subsys);
 	if (s->env != NULL) {
 		for (i = 0; i < s->num_env; i++) {
 			free(s->env[i].name);
 			free(s->env[i].val);
 		}
 		free(s->env);
 	}
 	session_proctitle(s);
 	session_unused(s->self);
 }
 
 void
 session_close_by_pid(struct ssh *ssh, pid_t pid, int status)
 {
 	Session *s = session_by_pid(pid);
 	if (s == NULL) {
 		debug_f("no session for pid %ld", (long)pid);
 		return;
 	}
 	if (s->chanid != -1)
 		session_exit_message(ssh, s, status);
 	if (s->ttyfd != -1)
 		session_pty_cleanup(s);
 	s->pid = 0;
 }
 
 /*
  * this is called when a channel dies before
  * the session 'child' itself dies
  */
 void
 session_close_by_channel(struct ssh *ssh, int id, int force, void *arg)
 {
 	Session *s = session_by_channel(id);
 	u_int i;
 
 	if (s == NULL) {
 		debug_f("no session for id %d", id);
 		return;
 	}
 	debug_f("channel %d child %ld", id, (long)s->pid);
 	if (s->pid != 0) {
 		debug_f("channel %d: has child, ttyfd %d", id, s->ttyfd);
 		/*
 		 * delay detach of session (unless this is a forced close),
 		 * but release pty, since the fd's to the child are already
 		 * closed
 		 */
 		if (s->ttyfd != -1)
 			session_pty_cleanup(s);
 		if (!force)
 			return;
 	}
 	/* detach by removing callback */
 	channel_cancel_cleanup(ssh, s->chanid);
 
 	/* Close any X11 listeners associated with this session */
 	if (s->x11_chanids != NULL) {
 		for (i = 0; s->x11_chanids[i] != -1; i++) {
 			session_close_x11(ssh, s->x11_chanids[i]);
 			s->x11_chanids[i] = -1;
 		}
 	}
 
 	s->chanid = -1;
 	session_close(ssh, s);
 }
 
 void
 session_destroy_all(struct ssh *ssh, void (*closefunc)(Session *))
 {
 	int i;
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used) {
 			if (closefunc != NULL)
 				closefunc(s);
 			else
 				session_close(ssh, s);
 		}
 	}
 }
 
 static char *
 session_tty_list(void)
 {
 	static char buf[1024];
 	int i;
 	char *cp;
 
 	buf[0] = '\0';
 	for (i = 0; i < sessions_nalloc; i++) {
 		Session *s = &sessions[i];
 		if (s->used && s->ttyfd != -1) {
 
 			if (strncmp(s->tty, "/dev/", 5) != 0) {
 				cp = strrchr(s->tty, '/');
 				cp = (cp == NULL) ? s->tty : cp + 1;
 			} else
 				cp = s->tty + 5;
 
 			if (buf[0] != '\0')
 				strlcat(buf, ",", sizeof buf);
 			strlcat(buf, cp, sizeof buf);
 		}
 	}
 	if (buf[0] == '\0')
 		strlcpy(buf, "notty", sizeof buf);
 	return buf;
 }
 
 void
 session_proctitle(Session *s)
 {
 	if (s->pw == NULL)
 		error("no user for session %d", s->self);
 	else
 		setproctitle("%s@%s", s->pw->pw_name, session_tty_list());
 }
 
 int
 session_setup_x11fwd(struct ssh *ssh, Session *s)
 {
 	struct stat st;
 	char display[512], auth_display[512];
 	char hostname[NI_MAXHOST];
 	u_int i;
 
 	if (!auth_opts->permit_x11_forwarding_flag) {
 		ssh_packet_send_debug(ssh, "X11 forwarding disabled by key options.");
 		return 0;
 	}
 	if (!options.x11_forwarding) {
 		debug("X11 forwarding disabled in server configuration file.");
 		return 0;
 	}
 	if (options.xauth_location == NULL ||
 	    (stat(options.xauth_location, &st) == -1)) {
 		ssh_packet_send_debug(ssh, "No xauth program; cannot forward X11.");
 		return 0;
 	}
 	if (s->display != NULL) {
 		debug("X11 display already set.");
 		return 0;
 	}
 	if (x11_create_display_inet(ssh, options.x11_display_offset,
 	    options.x11_use_localhost, s->single_connection,
 	    &s->display_number, &s->x11_chanids) == -1) {
 		debug("x11_create_display_inet failed.");
 		return 0;
 	}
 	for (i = 0; s->x11_chanids[i] != -1; i++) {
 		channel_register_cleanup(ssh, s->x11_chanids[i],
 		    session_close_single_x11, 0);
 	}
 
 	/* Set up a suitable value for the DISPLAY variable. */
 	if (gethostname(hostname, sizeof(hostname)) == -1)
 		fatal("gethostname: %.100s", strerror(errno));
 	/*
 	 * auth_display must be used as the displayname when the
 	 * authorization entry is added with xauth(1).  This will be
 	 * different than the DISPLAY string for localhost displays.
 	 */
 	if (options.x11_use_localhost) {
 		snprintf(display, sizeof display, "localhost:%u.%u",
 		    s->display_number, s->screen);
 		snprintf(auth_display, sizeof auth_display, "unix:%u.%u",
 		    s->display_number, s->screen);
 		s->display = xstrdup(display);
 		s->auth_display = xstrdup(auth_display);
 	} else {
 #ifdef IPADDR_IN_DISPLAY
 		struct hostent *he;
 		struct in_addr my_addr;
 
 		he = gethostbyname(hostname);
 		if (he == NULL) {
 			error("Can't get IP address for X11 DISPLAY.");
 			ssh_packet_send_debug(ssh, "Can't get IP address for X11 DISPLAY.");
 			return 0;
 		}
 		memcpy(&my_addr, he->h_addr_list[0], sizeof(struct in_addr));
 		snprintf(display, sizeof display, "%.50s:%u.%u", inet_ntoa(my_addr),
 		    s->display_number, s->screen);
 #else
 		snprintf(display, sizeof display, "%.400s:%u.%u", hostname,
 		    s->display_number, s->screen);
 #endif
 		s->display = xstrdup(display);
 		s->auth_display = xstrdup(display);
 	}
 
 	return 1;
 }
 
 static void
 do_authenticated2(struct ssh *ssh, Authctxt *authctxt)
 {
 	server_loop2(ssh, authctxt);
 }
 
 void
 do_cleanup(struct ssh *ssh, Authctxt *authctxt)
 {
 	static int called = 0;
 
 	debug("do_cleanup");
 
 	/* no cleanup if we're in the child for login shell */
 	if (is_child)
 		return;
 
 	/* avoid double cleanup */
 	if (called)
 		return;
 	called = 1;
 
 	if (authctxt == NULL)
 		return;
 
 #ifdef USE_PAM
 	if (options.use_pam) {
 		sshpam_cleanup();
 		sshpam_thread_cleanup();
 	}
 #endif
 
 	if (!authctxt->authenticated)
 		return;
 
 #ifdef KRB5
 	if (options.kerberos_ticket_cleanup &&
 	    authctxt->krb5_ctx)
 		krb5_cleanup_proc(authctxt);
 #endif
 
 #ifdef GSSAPI
 	if (options.gss_cleanup_creds)
 		ssh_gssapi_cleanup_creds();
 #endif
 
 	/* remove agent socket */
 	auth_sock_cleanup_proc(authctxt->pw);
 
 	/* remove userauth info */
 	if (auth_info_file != NULL) {
 		temporarily_use_uid(authctxt->pw);
 		unlink(auth_info_file);
 		restore_uid();
 		free(auth_info_file);
 		auth_info_file = NULL;
 	}
 
 	/*
 	 * Cleanup ptys/utmp only if privsep is disabled,
 	 * or if running in monitor.
 	 */
 	if (!use_privsep || mm_is_monitor())
 		session_destroy_all(ssh, session_pty_cleanup2);
 }
 
 /* Return a name for the remote host that fits inside utmp_size */
 
 const char *
 session_get_remote_name_or_ip(struct ssh *ssh, u_int utmp_size, int use_dns)
 {
 	const char *remote = "";
 
 	if (utmp_size > 0)
 		remote = auth_get_canonical_hostname(ssh, use_dns);
 	if (utmp_size == 0 || strlen(remote) > utmp_size)
 		remote = ssh_remote_ipaddr(ssh);
 	return remote;
 }
 
diff --git a/sftp-server.0 b/sftp-server.0
index 22c307f7980b..23fdda399806 100644
--- a/sftp-server.0
+++ b/sftp-server.0
@@ -1,98 +1,98 @@
 SFTP-SERVER(8)              System Manager's Manual             SFTP-SERVER(8)
 
 NAME
      sftp-server M-bM-^@M-^S OpenSSH SFTP server subsystem
 
 SYNOPSIS
      sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level]
                  [-P denied_requests] [-p allowed_requests] [-u umask]
      sftp-server -Q protocol_feature
 
 DESCRIPTION
      sftp-server is a program that speaks the server side of SFTP protocol to
      stdout and expects client requests from stdin.  sftp-server is not
      intended to be called directly, but from sshd(8) using the Subsystem
      option.
 
      Command-line flags to sftp-server should be specified in the Subsystem
      declaration.  See sshd_config(5) for more information.
 
      Valid options are:
 
      -d start_directory
              Specifies an alternate starting directory for users.  The
              pathname may contain the following tokens that are expanded at
              runtime: %% is replaced by a literal '%', %d is replaced by the
              home directory of the user being authenticated, and %u is
              replaced by the username of that user.  The default is to use the
              user's home directory.  This option is useful in conjunction with
              the sshd_config(5) ChrootDirectory option.
 
      -e      Causes sftp-server to print logging information to stderr instead
              of syslog for debugging.
 
      -f log_facility
              Specifies the facility code that is used when logging messages
              from sftp-server.  The possible values are: DAEMON, USER, AUTH,
              LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
              The default is AUTH.
 
      -h      Displays sftp-server usage information.
 
      -l log_level
              Specifies which messages will be logged by sftp-server.  The
              possible values are: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG,
              DEBUG1, DEBUG2, and DEBUG3.  INFO and VERBOSE log transactions
              that sftp-server performs on behalf of the client.  DEBUG and
              DEBUG1 are equivalent.  DEBUG2 and DEBUG3 each specify higher
              levels of debugging output.  The default is ERROR.
 
      -P denied_requests
              Specifies a comma-separated list of SFTP protocol requests that
              are banned by the server.  sftp-server will reply to any denied
              request with a failure.  The -Q flag can be used to determine the
              supported request types.  If both denied and allowed lists are
              specified, then the denied list is applied before the allowed
              list.
 
      -p allowed_requests
              Specifies a comma-separated list of SFTP protocol requests that
              are permitted by the server.  All request types that are not on
              the allowed list will be logged and replied to with a failure
              message.
 
              Care must be taken when using this feature to ensure that
              requests made implicitly by SFTP clients are permitted.
 
      -Q protocol_feature
              Queries protocol features supported by sftp-server.  At present
              the only feature that may be queried is M-bM-^@M-^\requestsM-bM-^@M-^], which may be
              used to deny or allow specific requests (flags -P and -p
              respectively).
 
      -R      Places this instance of sftp-server into a read-only mode.
              Attempts to open files for writing, as well as other operations
              that change the state of the filesystem, will be denied.
 
      -u umask
              Sets an explicit umask(2) to be applied to newly-created files
              and directories, instead of the user's default mask.
 
      On some systems, sftp-server must be able to access /dev/log for logging
      to work, and use of sftp-server in a chroot configuration therefore
      requires that syslogd(8) establish a logging socket inside the chroot
      directory.
 
 SEE ALSO
      sftp(1), ssh(1), sshd_config(5), sshd(8)
 
      T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-
      filexfer-02.txt, October 2001, work in progress material.
 
 HISTORY
      sftp-server first appeared in OpenBSD 2.8.
 
 AUTHORS
      Markus Friedl <markus@openbsd.org>
 
-OpenBSD 7.3                      July 27, 2021                     OpenBSD 7.3
+OpenBSD 7.5                      July 27, 2021                     OpenBSD 7.5
diff --git a/sftp.0 b/sftp.0
index 0183da34eac1..c6a9e60c40e7 100644
--- a/sftp.0
+++ b/sftp.0
@@ -1,438 +1,438 @@
 SFTP(1)                     General Commands Manual                    SFTP(1)
 
 NAME
      sftp M-bM-^@M-^S OpenSSH secure file transfer
 
 SYNOPSIS
      sftp [-46AaCfNpqrv] [-B buffer_size] [-b batchfile] [-c cipher]
           [-D sftp_server_command] [-F ssh_config] [-i identity_file]
           [-J destination] [-l limit] [-o ssh_option] [-P port]
           [-R num_requests] [-S program] [-s subsystem | sftp_server]
           [-X sftp_option] destination
 
 DESCRIPTION
      sftp is a file transfer program, similar to ftp(1), which performs all
      operations over an encrypted ssh(1) transport.  It may also use many
      features of ssh, such as public key authentication and compression.
 
      The destination may be specified either as [user@]host[:path] or as a URI
      in the form sftp://[user@]host[:port][/path].
 
      If the destination includes a path and it is not a directory, sftp will
      retrieve files automatically if a non-interactive authentication method
      is used; otherwise it will do so after successful interactive
      authentication.
 
      If no path is specified, or if the path is a directory, sftp will log in
      to the specified host and enter interactive command mode, changing to the
      remote directory if one was specified.  An optional trailing slash can be
      used to force the path to be interpreted as a directory.
 
      Since the destination formats use colon characters to delimit host names
      from path names or port numbers, IPv6 addresses must be enclosed in
      square brackets to avoid ambiguity.
 
      The options are as follows:
 
      -4      Forces sftp to use IPv4 addresses only.
 
      -6      Forces sftp to use IPv6 addresses only.
 
      -A      Allows forwarding of ssh-agent(1) to the remote system.  The
              default is not to forward an authentication agent.
 
      -a      Attempt to continue interrupted transfers rather than overwriting
              existing partial or complete copies of files.  If the partial
              contents differ from those being transferred, then the resultant
              file is likely to be corrupt.
 
      -B buffer_size
              Specify the size of the buffer that sftp uses when transferring
              files.  Larger buffers require fewer round trips at the cost of
              higher memory consumption.  The default is 32768 bytes.
 
      -b batchfile
              Batch mode reads a series of commands from an input batchfile
              instead of stdin.  Since it lacks user interaction, it should be
              used in conjunction with non-interactive authentication to
              obviate the need to enter a password at connection time (see
              sshd(8) and ssh-keygen(1) for details).
 
              A batchfile of M-bM-^@M-^X-M-bM-^@M-^Y may be used to indicate standard input.  sftp
              will abort if any of the following commands fail: get, put,
              reget, reput, rename, ln, rm, mkdir, chdir, ls, lchdir, copy, cp,
              chmod, chown, chgrp, lpwd, df, symlink, and lmkdir.
 
              Termination on error can be suppressed on a command by command
              basis by prefixing the command with a M-bM-^@M-^X-M-bM-^@M-^Y character (for example,
              -rm /tmp/blah*).  Echo of the command may be suppressed by
              prefixing the command with a M-bM-^@M-^X@M-bM-^@M-^Y character.  These two prefixes
              may be combined in any order, for example -@ls /bsd.
 
      -C      Enables compression (via ssh's -C flag).
 
      -c cipher
              Selects the cipher to use for encrypting the data transfers.
              This option is directly passed to ssh(1).
 
      -D sftp_server_command
              Connect directly to a local sftp server (rather than via ssh(1)).
              A command and arguments may be specified, for example
              "/path/sftp-server -el debug3".  This option may be useful in
              debugging the client and server.
 
      -F ssh_config
              Specifies an alternative per-user configuration file for ssh(1).
              This option is directly passed to ssh(1).
 
      -f      Requests that files be flushed to disk immediately after
              transfer.  When uploading files, this feature is only enabled if
              the server implements the "fsync@openssh.com" extension.
 
      -i identity_file
              Selects the file from which the identity (private key) for public
              key authentication is read.  This option is directly passed to
              ssh(1).
 
      -J destination
              Connect to the target host by first making an sftp connection to
              the jump host described by destination and then establishing a
              TCP forwarding to the ultimate destination from there.  Multiple
              jump hops may be specified separated by comma characters.  This
              is a shortcut to specify a ProxyJump configuration directive.
              This option is directly passed to ssh(1).
 
      -l limit
              Limits the used bandwidth, specified in Kbit/s.
 
      -N      Disables quiet mode, e.g. to override the implicit quiet mode set
              by the -b flag.
 
      -o ssh_option
              Can be used to pass options to ssh in the format used in
              ssh_config(5).  This is useful for specifying options for which
              there is no separate sftp command-line flag.  For example, to
              specify an alternate port use: sftp -oPort=24.  For full details
              of the options listed below, and their possible values, see
              ssh_config(5).
 
                    AddressFamily
                    BatchMode
                    BindAddress
                    BindInterface
                    CanonicalDomains
                    CanonicalizeFallbackLocal
                    CanonicalizeHostname
                    CanonicalizeMaxDots
                    CanonicalizePermittedCNAMEs
                    CASignatureAlgorithms
                    CertificateFile
                    CheckHostIP
                    Ciphers
                    Compression
                    ConnectionAttempts
                    ConnectTimeout
                    ControlMaster
                    ControlPath
                    ControlPersist
                    GlobalKnownHostsFile
                    GSSAPIAuthentication
                    GSSAPIDelegateCredentials
                    HashKnownHosts
                    Host
                    HostbasedAcceptedAlgorithms
                    HostbasedAuthentication
                    HostKeyAlgorithms
                    HostKeyAlias
                    Hostname
                    IdentitiesOnly
                    IdentityAgent
                    IdentityFile
                    IPQoS
                    KbdInteractiveAuthentication
                    KbdInteractiveDevices
                    KexAlgorithms
                    KnownHostsCommand
                    LogLevel
                    MACs
                    NoHostAuthenticationForLocalhost
                    NumberOfPasswordPrompts
                    PasswordAuthentication
                    PKCS11Provider
                    Port
                    PreferredAuthentications
                    ProxyCommand
                    ProxyJump
                    PubkeyAcceptedAlgorithms
                    PubkeyAuthentication
                    RekeyLimit
                    RequiredRSASize
                    SendEnv
                    ServerAliveInterval
                    ServerAliveCountMax
                    SetEnv
                    StrictHostKeyChecking
                    TCPKeepAlive
                    UpdateHostKeys
                    User
                    UserKnownHostsFile
                    VerifyHostKeyDNS
 
      -P port
              Specifies the port to connect to on the remote host.
 
      -p      Preserves modification times, access times, and modes from the
              original files transferred.
 
      -q      Quiet mode: disables the progress meter as well as warning and
              diagnostic messages from ssh(1).
 
      -R num_requests
              Specify how many requests may be outstanding at any one time.
              Increasing this may slightly improve file transfer speed but will
              increase memory usage.  The default is 64 outstanding requests.
 
      -r      Recursively copy entire directories when uploading and
              downloading.  Note that sftp does not follow symbolic links
              encountered in the tree traversal.
 
      -S program
              Name of the program to use for the encrypted connection.  The
              program must understand ssh(1) options.
 
      -s subsystem | sftp_server
              Specifies the SSH2 subsystem or the path for an sftp server on
              the remote host.  A path is useful when the remote sshd(8) does
              not have an sftp subsystem configured.
 
      -v      Raise logging level.  This option is also passed to ssh.
 
      -X sftp_option
              Specify an option that controls aspects of SFTP protocol
              behaviour.  The valid options are:
 
              nrequests=value
                      Controls how many concurrent SFTP read or write requests
                      may be in progress at any point in time during a download
                      or upload.  By default 64 requests may be active
                      concurrently.
 
              buffer=value
                      Controls the maximum buffer size for a single SFTP
                      read/write operation used during download or upload.  By
                      default a 32KB buffer is used.
 
 INTERACTIVE COMMANDS
      Once in interactive mode, sftp understands a set of commands similar to
      those of ftp(1).  Commands are case insensitive.  Pathnames that contain
      spaces must be enclosed in quotes.  Any special characters contained
      within pathnames that are recognized by glob(3) must be escaped with
      backslashes (M-bM-^@M-^X\M-bM-^@M-^Y).
 
      bye     Quit sftp.
 
      cd [path]
              Change remote directory to path.  If path is not specified, then
              change directory to the one the session started in.
 
      chgrp [-h] grp path
              Change group of file path to grp.  path may contain glob(7)
              characters and may match multiple files.  grp must be a numeric
              GID.
 
              If the -h flag is specified, then symlinks will not be followed.
              Note that this is only supported by servers that implement the
              "lsetstat@openssh.com" extension.
 
      chmod [-h] mode path
              Change permissions of file path to mode.  path may contain
              glob(7) characters and may match multiple files.
 
              If the -h flag is specified, then symlinks will not be followed.
              Note that this is only supported by servers that implement the
              "lsetstat@openssh.com" extension.
 
      chown [-h] own path
              Change owner of file path to own.  path may contain glob(7)
              characters and may match multiple files.  own must be a numeric
              UID.
 
              If the -h flag is specified, then symlinks will not be followed.
              Note that this is only supported by servers that implement the
              "lsetstat@openssh.com" extension.
 
      copy oldpath newpath
              Copy remote file from oldpath to newpath.
 
              Note that this is only supported by servers that implement the
              "copy-data" extension.
 
      cp oldpath newpath
              Alias to copy command.
 
      df [-hi] [path]
              Display usage information for the filesystem holding the current
              directory (or path if specified).  If the -h flag is specified,
              the capacity information will be displayed using "human-readable"
              suffixes.  The -i flag requests display of inode information in
              addition to capacity information.  This command is only supported
              on servers that implement the M-bM-^@M-^\statvfs@openssh.comM-bM-^@M-^] extension.
 
      exit    Quit sftp.
 
      get [-afpR] remote-path [local-path]
              Retrieve the remote-path and store it on the local machine.  If
              the local path name is not specified, it is given the same name
              it has on the remote machine.  remote-path may contain glob(7)
              characters and may match multiple files.  If it does and
              local-path is specified, then local-path must specify a
              directory.
 
              If the -a flag is specified, then attempt to resume partial
              transfers of existing files.  Note that resumption assumes that
              any partial copy of the local file matches the remote copy.  If
              the remote file contents differ from the partial local copy then
              the resultant file is likely to be corrupt.
 
              If the -f flag is specified, then fsync(2) will be called after
              the file transfer has completed to flush the file to disk.
 
              If the -p flag is specified, then full file permissions and
              access times are copied too.
 
              If the -R flag is specified then directories will be copied
              recursively.  Note that sftp does not follow symbolic links when
              performing recursive transfers.
 
      help    Display help text.
 
      lcd [path]
              Change local directory to path.  If path is not specified, then
              change directory to the local user's home directory.
 
      lls [ls-options [path]]
              Display local directory listing of either path or current
              directory if path is not specified.  ls-options may contain any
              flags supported by the local system's ls(1) command.  path may
              contain glob(7) characters and may match multiple files.
 
      lmkdir path
              Create local directory specified by path.
 
      ln [-s] oldpath newpath
              Create a link from oldpath to newpath.  If the -s flag is
              specified the created link is a symbolic link, otherwise it is a
              hard link.
 
      lpwd    Print local working directory.
 
      ls [-1afhlnrSt] [path]
              Display a remote directory listing of either path or the current
              directory if path is not specified.  path may contain glob(7)
              characters and may match multiple files.
 
              The following flags are recognized and alter the behaviour of ls
              accordingly:
 
              -1      Produce single columnar output.
 
              -a      List files beginning with a dot (M-bM-^@M-^X.M-bM-^@M-^Y).
 
              -f      Do not sort the listing.  The default sort order is
                      lexicographical.
 
              -h      When used with a long format option, use unit suffixes:
                      Byte, Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte,
                      and Exabyte in order to reduce the number of digits to
                      four or fewer using powers of 2 for sizes (K=1024,
                      M=1048576, etc.).
 
              -l      Display additional details including permissions and
                      ownership information.
 
              -n      Produce a long listing with user and group information
                      presented numerically.
 
              -r      Reverse the sort order of the listing.
 
              -S      Sort the listing by file size.
 
              -t      Sort the listing by last modification time.
 
      lumask umask
              Set local umask to umask.
 
      mkdir path
              Create remote directory specified by path.
 
      progress
              Toggle display of progress meter.
 
      put [-afpR] local-path [remote-path]
              Upload local-path and store it on the remote machine.  If the
              remote path name is not specified, it is given the same name it
              has on the local machine.  local-path may contain glob(7)
              characters and may match multiple files.  If it does and
              remote-path is specified, then remote-path must specify a
              directory.
 
              If the -a flag is specified, then attempt to resume partial
              transfers of existing files.  Note that resumption assumes that
              any partial copy of the remote file matches the local copy.  If
              the local file contents differ from the remote local copy then
              the resultant file is likely to be corrupt.
 
              If the -f flag is specified, then a request will be sent to the
              server to call fsync(2) after the file has been transferred.
              Note that this is only supported by servers that implement the
              "fsync@openssh.com" extension.
 
              If the -p flag is specified, then full file permissions and
              access times are copied too.
 
              If the -R flag is specified then directories will be copied
              recursively.  Note that sftp does not follow symbolic links when
              performing recursive transfers.
 
      pwd     Display remote working directory.
 
      quit    Quit sftp.
 
      reget [-fpR] remote-path [local-path]
              Resume download of remote-path.  Equivalent to get with the -a
              flag set.
 
      reput [-fpR] local-path [remote-path]
              Resume upload of local-path.  Equivalent to put with the -a flag
              set.
 
      rename oldpath newpath
              Rename remote file from oldpath to newpath.
 
      rm path
              Delete remote file specified by path.
 
      rmdir path
              Remove remote directory specified by path.
 
      symlink oldpath newpath
              Create a symbolic link from oldpath to newpath.
 
      version
              Display the sftp protocol version.
 
      !command
              Execute command in local shell.
 
      !       Escape to local shell.
 
      ?       Synonym for help.
 
 SEE ALSO
      ftp(1), ls(1), scp(1), ssh(1), ssh-add(1), ssh-keygen(1), ssh_config(5),
      glob(7), sftp-server(8), sshd(8)
 
      T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-
      filexfer-00.txt, January 2001, work in progress material.
 
-OpenBSD 7.3                    December 16, 2022                   OpenBSD 7.3
+OpenBSD 7.5                    December 16, 2022                   OpenBSD 7.5
diff --git a/sftp.c b/sftp.c
index c609b4153d79..76ba4de373cb 100644
--- a/sftp.c
+++ b/sftp.c
@@ -1,2696 +1,2696 @@
-/* $OpenBSD: sftp.c,v 1.236 2023/09/10 23:12:32 djm Exp $ */
+/* $OpenBSD: sftp.c,v 1.237 2024/02/01 02:37:33 djm Exp $ */
 /*
  * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #include <sys/socket.h>
 #include <sys/wait.h>
 #ifdef HAVE_SYS_STATVFS_H
 #include <sys/statvfs.h>
 #endif
 
 #include <ctype.h>
 #include <errno.h>
 
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #ifdef HAVE_LIBGEN_H
 #include <libgen.h>
 #endif
 #ifdef HAVE_LOCALE_H
 # include <locale.h>
 #endif
 #ifdef USE_LIBEDIT
 #include <histedit.h>
 #else
 typedef void EditLine;
 #endif
 #include <limits.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
 #ifdef HAVE_UTIL_H
 # include <util.h>
 #endif
 
 #include "xmalloc.h"
 #include "log.h"
 #include "pathnames.h"
 #include "misc.h"
 #include "utf8.h"
 
 #include "sftp.h"
 #include "ssherr.h"
 #include "sshbuf.h"
 #include "sftp-common.h"
 #include "sftp-client.h"
 #include "sftp-usergroup.h"
 
 /* File to read commands from */
 FILE* infile;
 
 /* Are we in batchfile mode? */
 int batchmode = 0;
 
 /* PID of ssh transport process */
 static volatile pid_t sshpid = -1;
 
 /* Suppress diagnostic messages */
 int quiet = 0;
 
 /* This is set to 0 if the progressmeter is not desired. */
 int showprogress = 1;
 
 /* When this option is set, we always recursively download/upload directories */
 int global_rflag = 0;
 
 /* When this option is set, we resume download or upload if possible */
 int global_aflag = 0;
 
 /* When this option is set, the file transfers will always preserve times */
 int global_pflag = 0;
 
 /* When this option is set, transfers will have fsync() called on each file */
 int global_fflag = 0;
 
 /* SIGINT received during command processing */
 volatile sig_atomic_t interrupted = 0;
 
 /* I wish qsort() took a separate ctx for the comparison function...*/
 int sort_flag;
 glob_t *sort_glob;
 
 /* Context used for commandline completion */
 struct complete_ctx {
 	struct sftp_conn *conn;
 	char **remote_pathp;
 };
 
 int sftp_glob(struct sftp_conn *, const char *, int,
     int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
 
 extern char *__progname;
 
 /* Separators for interactive commands */
 #define WHITESPACE " \t\r\n"
 
 /* ls flags */
 #define LS_LONG_VIEW	0x0001	/* Full view ala ls -l */
 #define LS_SHORT_VIEW	0x0002	/* Single row view ala ls -1 */
 #define LS_NUMERIC_VIEW	0x0004	/* Long view with numeric uid/gid */
 #define LS_NAME_SORT	0x0008	/* Sort by name (default) */
 #define LS_TIME_SORT	0x0010	/* Sort by mtime */
 #define LS_SIZE_SORT	0x0020	/* Sort by file size */
 #define LS_REVERSE_SORT	0x0040	/* Reverse sort order */
 #define LS_SHOW_ALL	0x0080	/* Don't skip filenames starting with '.' */
 #define LS_SI_UNITS	0x0100	/* Display sizes as K, M, G, etc. */
 
 #define VIEW_FLAGS	(LS_LONG_VIEW|LS_SHORT_VIEW|LS_NUMERIC_VIEW|LS_SI_UNITS)
 #define SORT_FLAGS	(LS_NAME_SORT|LS_TIME_SORT|LS_SIZE_SORT)
 
 /* Commands for interactive mode */
 enum sftp_command {
 	I_CHDIR = 1,
 	I_CHGRP,
 	I_CHMOD,
 	I_CHOWN,
 	I_COPY,
 	I_DF,
 	I_GET,
 	I_HELP,
 	I_LCHDIR,
 	I_LINK,
 	I_LLS,
 	I_LMKDIR,
 	I_LPWD,
 	I_LS,
 	I_LUMASK,
 	I_MKDIR,
 	I_PUT,
 	I_PWD,
 	I_QUIT,
 	I_REGET,
 	I_RENAME,
 	I_REPUT,
 	I_RM,
 	I_RMDIR,
 	I_SHELL,
 	I_SYMLINK,
 	I_VERSION,
 	I_PROGRESS,
 };
 
 struct CMD {
 	const char *c;
 	const int n;
 	const int t;	/* Completion type for the first argument */
 	const int t2;	/* completion type for the optional second argument */
 };
 
 /* Type of completion */
 #define NOARGS	0
 #define REMOTE	1
 #define LOCAL	2
 
 static const struct CMD cmds[] = {
-	{ "bye",	I_QUIT,		NOARGS, 	NOARGS	},
-	{ "cd",		I_CHDIR,	REMOTE, 	NOARGS	},
-	{ "chdir",	I_CHDIR,	REMOTE, 	NOARGS	},
-	{ "chgrp",	I_CHGRP,	REMOTE, 	NOARGS	},
-	{ "chmod",	I_CHMOD,	REMOTE, 	NOARGS	},
-	{ "chown",	I_CHOWN,	REMOTE, 	NOARGS	},
-	{ "copy",	I_COPY,		REMOTE, 	LOCAL	},
-	{ "cp",		I_COPY,		REMOTE, 	LOCAL	},
-	{ "df",		I_DF,		REMOTE, 	NOARGS	},
-	{ "dir",	I_LS,		REMOTE, 	NOARGS	},
-	{ "exit",	I_QUIT,		NOARGS, 	NOARGS	},
-	{ "get",	I_GET,		REMOTE, 	LOCAL	},
-	{ "help",	I_HELP,		NOARGS, 	NOARGS	},
+	{ "bye",	I_QUIT,		NOARGS,		NOARGS	},
+	{ "cd",		I_CHDIR,	REMOTE,		NOARGS	},
+	{ "chdir",	I_CHDIR,	REMOTE,		NOARGS	},
+	{ "chgrp",	I_CHGRP,	REMOTE,		NOARGS	},
+	{ "chmod",	I_CHMOD,	REMOTE,		NOARGS	},
+	{ "chown",	I_CHOWN,	REMOTE,		NOARGS	},
+	{ "copy",	I_COPY,		REMOTE,		LOCAL	},
+	{ "cp",		I_COPY,		REMOTE,		LOCAL	},
+	{ "df",		I_DF,		REMOTE,		NOARGS	},
+	{ "dir",	I_LS,		REMOTE,		NOARGS	},
+	{ "exit",	I_QUIT,		NOARGS,		NOARGS	},
+	{ "get",	I_GET,		REMOTE,		LOCAL	},
+	{ "help",	I_HELP,		NOARGS,		NOARGS	},
 	{ "lcd",	I_LCHDIR,	LOCAL,		NOARGS	},
 	{ "lchdir",	I_LCHDIR,	LOCAL,		NOARGS	},
 	{ "lls",	I_LLS,		LOCAL,		NOARGS	},
 	{ "lmkdir",	I_LMKDIR,	LOCAL,		NOARGS	},
-	{ "ln",		I_LINK,		REMOTE, 	REMOTE	},
+	{ "ln",		I_LINK,		REMOTE,		REMOTE	},
 	{ "lpwd",	I_LPWD,		LOCAL,		NOARGS	},
 	{ "ls",		I_LS,		REMOTE,		NOARGS	},
 	{ "lumask",	I_LUMASK,	NOARGS,		NOARGS	},
 	{ "mkdir",	I_MKDIR,	REMOTE,		NOARGS	},
 	{ "mget",	I_GET,		REMOTE,		LOCAL	},
 	{ "mput",	I_PUT,		LOCAL,		REMOTE	},
 	{ "progress",	I_PROGRESS,	NOARGS,		NOARGS	},
 	{ "put",	I_PUT,		LOCAL,		REMOTE	},
-	{ "pwd",	I_PWD,		REMOTE, 	NOARGS	},
-	{ "quit",	I_QUIT,		NOARGS, 	NOARGS	},
-	{ "reget",	I_REGET,	REMOTE, 	LOCAL	},
-	{ "rename",	I_RENAME,	REMOTE, 	REMOTE	},
+	{ "pwd",	I_PWD,		REMOTE,		NOARGS	},
+	{ "quit",	I_QUIT,		NOARGS,		NOARGS	},
+	{ "reget",	I_REGET,	REMOTE,		LOCAL	},
+	{ "rename",	I_RENAME,	REMOTE,		REMOTE	},
 	{ "reput",	I_REPUT,	LOCAL,		REMOTE	},
 	{ "rm",		I_RM,		REMOTE,		NOARGS	},
 	{ "rmdir",	I_RMDIR,	REMOTE,		NOARGS	},
 	{ "symlink",	I_SYMLINK,	REMOTE,		REMOTE	},
-	{ "version",	I_VERSION,	NOARGS, 	NOARGS	},
-	{ "!",		I_SHELL,	NOARGS, 	NOARGS	},
-	{ "?",		I_HELP,		NOARGS, 	NOARGS	},
+	{ "version",	I_VERSION,	NOARGS,		NOARGS	},
+	{ "!",		I_SHELL,	NOARGS,		NOARGS	},
+	{ "?",		I_HELP,		NOARGS,		NOARGS	},
 	{ NULL,		-1,		-1,		-1	}
 };
 
 static void
 killchild(int signo)
 {
 	pid_t pid;
 
 	pid = sshpid;
 	if (pid > 1) {
 		kill(pid, SIGTERM);
 		(void)waitpid(pid, NULL, 0);
 	}
 
 	_exit(1);
 }
 
 static void
 suspchild(int signo)
 {
 	if (sshpid > 1) {
 		kill(sshpid, signo);
 		while (waitpid(sshpid, NULL, WUNTRACED) == -1 && errno == EINTR)
 			continue;
 	}
 	kill(getpid(), SIGSTOP);
 }
 
 static void
 cmd_interrupt(int signo)
 {
 	const char msg[] = "\rInterrupt  \n";
 	int olderrno = errno;
 
 	(void)write(STDERR_FILENO, msg, sizeof(msg) - 1);
 	interrupted = 1;
 	errno = olderrno;
 }
 
 static void
 read_interrupt(int signo)
 {
 	interrupted = 1;
 }
 
 static void
 sigchld_handler(int sig)
 {
 	int save_errno = errno;
 	pid_t pid;
 	const char msg[] = "\rConnection closed.  \n";
 
 	/* Report if ssh transport process dies. */
 	while ((pid = waitpid(sshpid, NULL, WNOHANG)) == -1 && errno == EINTR)
 		continue;
 	if (pid == sshpid) {
 		if (!quiet)
 		    (void)write(STDERR_FILENO, msg, sizeof(msg) - 1);
 		sshpid = -1;
 	}
 
 	errno = save_errno;
 }
 
 static void
 help(void)
 {
 	printf("Available commands:\n"
 	    "bye                                Quit sftp\n"
 	    "cd path                            Change remote directory to 'path'\n"
 	    "chgrp [-h] grp path                Change group of file 'path' to 'grp'\n"
 	    "chmod [-h] mode path               Change permissions of file 'path' to 'mode'\n"
 	    "chown [-h] own path                Change owner of file 'path' to 'own'\n"
 	    "copy oldpath newpath               Copy remote file\n"
 	    "cp oldpath newpath                 Copy remote file\n"
 	    "df [-hi] [path]                    Display statistics for current directory or\n"
 	    "                                   filesystem containing 'path'\n"
 	    "exit                               Quit sftp\n"
 	    "get [-afpR] remote [local]         Download file\n"
 	    "help                               Display this help text\n"
 	    "lcd path                           Change local directory to 'path'\n"
 	    "lls [ls-options [path]]            Display local directory listing\n"
 	    "lmkdir path                        Create local directory\n"
 	    "ln [-s] oldpath newpath            Link remote file (-s for symlink)\n"
 	    "lpwd                               Print local working directory\n"
 	    "ls [-1afhlnrSt] [path]             Display remote directory listing\n"
 	    "lumask umask                       Set local umask to 'umask'\n"
 	    "mkdir path                         Create remote directory\n"
 	    "progress                           Toggle display of progress meter\n"
 	    "put [-afpR] local [remote]         Upload file\n"
 	    "pwd                                Display remote working directory\n"
 	    "quit                               Quit sftp\n"
 	    "reget [-fpR] remote [local]        Resume download file\n"
 	    "rename oldpath newpath             Rename remote file\n"
 	    "reput [-fpR] local [remote]        Resume upload file\n"
 	    "rm path                            Delete remote file\n"
 	    "rmdir path                         Remove remote directory\n"
 	    "symlink oldpath newpath            Symlink remote file\n"
 	    "version                            Show SFTP version\n"
 	    "!command                           Execute 'command' in local shell\n"
 	    "!                                  Escape to local shell\n"
 	    "?                                  Synonym for help\n");
 }
 
 static void
 local_do_shell(const char *args)
 {
 	int status;
 	char *shell;
 	pid_t pid;
 
 	if (!*args)
 		args = NULL;
 
 	if ((shell = getenv("SHELL")) == NULL || *shell == '\0')
 		shell = _PATH_BSHELL;
 
 	if ((pid = fork()) == -1)
 		fatal("Couldn't fork: %s", strerror(errno));
 
 	if (pid == 0) {
 		/* XXX: child has pipe fds to ssh subproc open - issue? */
 		if (args) {
 			debug3("Executing %s -c \"%s\"", shell, args);
 			execl(shell, shell, "-c", args, (char *)NULL);
 		} else {
 			debug3("Executing %s", shell);
 			execl(shell, shell, (char *)NULL);
 		}
 		fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
 		    strerror(errno));
 		_exit(1);
 	}
 	while (waitpid(pid, &status, 0) == -1)
 		if (errno != EINTR)
 			fatal("Couldn't wait for child: %s", strerror(errno));
 	if (!WIFEXITED(status))
 		error("Shell exited abnormally");
 	else if (WEXITSTATUS(status))
 		error("Shell exited with status %d", WEXITSTATUS(status));
 }
 
 static void
 local_do_ls(const char *args)
 {
 	if (!args || !*args)
 		local_do_shell(_PATH_LS);
 	else {
 		int len = strlen(_PATH_LS " ") + strlen(args) + 1;
 		char *buf = xmalloc(len);
 
 		/* XXX: quoting - rip quoting code from ftp? */
 		snprintf(buf, len, _PATH_LS " %s", args);
 		local_do_shell(buf);
 		free(buf);
 	}
 }
 
 /* Strip one path (usually the pwd) from the start of another */
 static char *
 path_strip(const char *path, const char *strip)
 {
 	size_t len;
 
 	if (strip == NULL)
 		return (xstrdup(path));
 
 	len = strlen(strip);
 	if (strncmp(path, strip, len) == 0) {
 		if (strip[len - 1] != '/' && path[len] == '/')
 			len++;
 		return (xstrdup(path + len));
 	}
 
 	return (xstrdup(path));
 }
 
 static int
 parse_getput_flags(const char *cmd, char **argv, int argc,
     int *aflag, int *fflag, int *pflag, int *rflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*aflag = *fflag = *rflag = *pflag = 0;
 	while ((ch = getopt(argc, argv, "afPpRr")) != -1) {
 		switch (ch) {
 		case 'a':
 			*aflag = 1;
 			break;
 		case 'f':
 			*fflag = 1;
 			break;
 		case 'p':
 		case 'P':
 			*pflag = 1;
 			break;
 		case 'r':
 		case 'R':
 			*rflag = 1;
 			break;
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_link_flags(const char *cmd, char **argv, int argc, int *sflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*sflag = 0;
 	while ((ch = getopt(argc, argv, "s")) != -1) {
 		switch (ch) {
 		case 's':
 			*sflag = 1;
 			break;
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_rename_flags(const char *cmd, char **argv, int argc, int *lflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*lflag = 0;
 	while ((ch = getopt(argc, argv, "l")) != -1) {
 		switch (ch) {
 		case 'l':
 			*lflag = 1;
 			break;
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_ls_flags(char **argv, int argc, int *lflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*lflag = LS_NAME_SORT;
 	while ((ch = getopt(argc, argv, "1Safhlnrt")) != -1) {
 		switch (ch) {
 		case '1':
 			*lflag &= ~VIEW_FLAGS;
 			*lflag |= LS_SHORT_VIEW;
 			break;
 		case 'S':
 			*lflag &= ~SORT_FLAGS;
 			*lflag |= LS_SIZE_SORT;
 			break;
 		case 'a':
 			*lflag |= LS_SHOW_ALL;
 			break;
 		case 'f':
 			*lflag &= ~SORT_FLAGS;
 			break;
 		case 'h':
 			*lflag |= LS_SI_UNITS;
 			break;
 		case 'l':
 			*lflag &= ~LS_SHORT_VIEW;
 			*lflag |= LS_LONG_VIEW;
 			break;
 		case 'n':
 			*lflag &= ~LS_SHORT_VIEW;
 			*lflag |= LS_NUMERIC_VIEW|LS_LONG_VIEW;
 			break;
 		case 'r':
 			*lflag |= LS_REVERSE_SORT;
 			break;
 		case 't':
 			*lflag &= ~SORT_FLAGS;
 			*lflag |= LS_TIME_SORT;
 			break;
 		default:
 			error("ls: Invalid flag -%c", optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_df_flags(const char *cmd, char **argv, int argc, int *hflag, int *iflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*hflag = *iflag = 0;
 	while ((ch = getopt(argc, argv, "hi")) != -1) {
 		switch (ch) {
 		case 'h':
 			*hflag = 1;
 			break;
 		case 'i':
 			*iflag = 1;
 			break;
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_ch_flags(const char *cmd, char **argv, int argc, int *hflag)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	*hflag = 0;
 	while ((ch = getopt(argc, argv, "h")) != -1) {
 		switch (ch) {
 		case 'h':
 			*hflag = 1;
 			break;
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static int
 parse_no_flags(const char *cmd, char **argv, int argc)
 {
 	extern int opterr, optind, optopt, optreset;
 	int ch;
 
 	optind = optreset = 1;
 	opterr = 0;
 
 	while ((ch = getopt(argc, argv, "")) != -1) {
 		switch (ch) {
 		default:
 			error("%s: Invalid flag -%c", cmd, optopt);
 			return -1;
 		}
 	}
 
 	return optind;
 }
 
 static char *
 escape_glob(const char *s)
 {
 	size_t i, o, len;
 	char *ret;
 
 	len = strlen(s);
 	ret = xcalloc(2, len + 1);
 	for (i = o = 0; i < len; i++) {
 		if (strchr("[]?*\\", s[i]) != NULL)
 			ret[o++] = '\\';
 		ret[o++] = s[i];
 	}
 	ret[o++] = '\0';
 	return ret;
 }
 
 /*
  * Arg p must be dynamically allocated.  make_absolute will either return it
  * or free it and allocate a new one.  Caller must free returned string.
  */
 static char *
 make_absolute_pwd_glob(char *p, const char *pwd)
 {
 	char *ret, *escpwd;
 
 	escpwd = escape_glob(pwd);
 	if (p == NULL)
 		return escpwd;
 	ret = sftp_make_absolute(p, escpwd);
 	free(escpwd);
 	return ret;
 }
 
 static int
 local_is_dir(const char *path)
 {
 	struct stat sb;
 
 	if (stat(path, &sb) == -1)
 		return 0;
 	return S_ISDIR(sb.st_mode);
 }
 
 static int
 process_get(struct sftp_conn *conn, const char *src, const char *dst,
     const char *pwd, int pflag, int rflag, int resume, int fflag)
 {
 	char *filename, *abs_src = NULL, *abs_dst = NULL, *tmp = NULL;
 	glob_t g;
 	int i, r, err = 0;
 
 	abs_src = make_absolute_pwd_glob(xstrdup(src), pwd);
 	memset(&g, 0, sizeof(g));
 
 	debug3("Looking up %s", abs_src);
 	if ((r = sftp_glob(conn, abs_src, GLOB_MARK, NULL, &g)) != 0) {
 		if (r == GLOB_NOSPACE) {
 			error("Too many matches for \"%s\".", abs_src);
 		} else {
 			error("File \"%s\" not found.", abs_src);
 		}
 		err = -1;
 		goto out;
 	}
 
 	/*
 	 * If multiple matches then dst must be a directory or
 	 * unspecified.
 	 */
 	if (g.gl_matchc > 1 && dst != NULL && !local_is_dir(dst)) {
 		error("Multiple source paths, but destination "
 		    "\"%s\" is not a directory", dst);
 		err = -1;
 		goto out;
 	}
 
 	for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 		tmp = xstrdup(g.gl_pathv[i]);
 		if ((filename = basename(tmp)) == NULL) {
 			error("basename %s: %s", tmp, strerror(errno));
 			free(tmp);
 			err = -1;
 			goto out;
 		}
 
 		if (g.gl_matchc == 1 && dst) {
 			if (local_is_dir(dst)) {
 				abs_dst = sftp_path_append(dst, filename);
 			} else {
 				abs_dst = xstrdup(dst);
 			}
 		} else if (dst) {
 			abs_dst = sftp_path_append(dst, filename);
 		} else {
 			abs_dst = xstrdup(filename);
 		}
 		free(tmp);
 
 		resume |= global_aflag;
 		if (!quiet && resume)
 			mprintf("Resuming %s to %s\n",
 			    g.gl_pathv[i], abs_dst);
 		else if (!quiet && !resume)
 			mprintf("Fetching %s to %s\n",
 			    g.gl_pathv[i], abs_dst);
 		/* XXX follow link flag */
 		if (sftp_globpath_is_dir(g.gl_pathv[i]) &&
 		    (rflag || global_rflag)) {
 			if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst,
 			    NULL, pflag || global_pflag, 1, resume,
 			    fflag || global_fflag, 0, 0) == -1)
 				err = -1;
 		} else {
 			if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL,
 			    pflag || global_pflag, resume,
 			    fflag || global_fflag, 0) == -1)
 				err = -1;
 		}
 		free(abs_dst);
 		abs_dst = NULL;
 	}
 
 out:
 	free(abs_src);
 	globfree(&g);
 	return(err);
 }
 
 static int
 process_put(struct sftp_conn *conn, const char *src, const char *dst,
     const char *pwd, int pflag, int rflag, int resume, int fflag)
 {
 	char *tmp_dst = NULL;
 	char *abs_dst = NULL;
 	char *tmp = NULL, *filename = NULL;
 	glob_t g;
 	int err = 0;
 	int i, dst_is_dir = 1;
 	struct stat sb;
 
 	if (dst) {
 		tmp_dst = xstrdup(dst);
 		tmp_dst = sftp_make_absolute(tmp_dst, pwd);
 	}
 
 	memset(&g, 0, sizeof(g));
 	debug3("Looking up %s", src);
 	if (glob(src, GLOB_NOCHECK | GLOB_MARK, NULL, &g)) {
 		error("File \"%s\" not found.", src);
 		err = -1;
 		goto out;
 	}
 
 	/* If we aren't fetching to pwd then stash this status for later */
 	if (tmp_dst != NULL)
 		dst_is_dir = sftp_remote_is_dir(conn, tmp_dst);
 
 	/* If multiple matches, dst may be directory or unspecified */
 	if (g.gl_matchc > 1 && tmp_dst && !dst_is_dir) {
 		error("Multiple paths match, but destination "
 		    "\"%s\" is not a directory", tmp_dst);
 		err = -1;
 		goto out;
 	}
 
 	for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 		if (stat(g.gl_pathv[i], &sb) == -1) {
 			err = -1;
 			error("stat %s: %s", g.gl_pathv[i], strerror(errno));
 			continue;
 		}
 
 		tmp = xstrdup(g.gl_pathv[i]);
 		if ((filename = basename(tmp)) == NULL) {
 			error("basename %s: %s", tmp, strerror(errno));
 			free(tmp);
 			err = -1;
 			goto out;
 		}
 
 		free(abs_dst);
 		abs_dst = NULL;
 		if (g.gl_matchc == 1 && tmp_dst) {
 			/* If directory specified, append filename */
 			if (dst_is_dir)
 				abs_dst = sftp_path_append(tmp_dst, filename);
 			else
 				abs_dst = xstrdup(tmp_dst);
 		} else if (tmp_dst) {
 			abs_dst = sftp_path_append(tmp_dst, filename);
 		} else {
 			abs_dst = sftp_make_absolute(xstrdup(filename), pwd);
 		}
 		free(tmp);
 
 		resume |= global_aflag;
 		if (!quiet && resume)
 			mprintf("Resuming upload of %s to %s\n",
 			    g.gl_pathv[i], abs_dst);
 		else if (!quiet && !resume)
 			mprintf("Uploading %s to %s\n",
 			    g.gl_pathv[i], abs_dst);
 		/* XXX follow_link_flag */
 		if (sftp_globpath_is_dir(g.gl_pathv[i]) &&
 		    (rflag || global_rflag)) {
 			if (sftp_upload_dir(conn, g.gl_pathv[i], abs_dst,
 			    pflag || global_pflag, 1, resume,
 			    fflag || global_fflag, 0, 0) == -1)
 				err = -1;
 		} else {
 			if (sftp_upload(conn, g.gl_pathv[i], abs_dst,
 			    pflag || global_pflag, resume,
 			    fflag || global_fflag, 0) == -1)
 				err = -1;
 		}
 	}
 
 out:
 	free(abs_dst);
 	free(tmp_dst);
 	globfree(&g);
 	return(err);
 }
 
 static int
 sdirent_comp(const void *aa, const void *bb)
 {
 	SFTP_DIRENT *a = *(SFTP_DIRENT **)aa;
 	SFTP_DIRENT *b = *(SFTP_DIRENT **)bb;
 	int rmul = sort_flag & LS_REVERSE_SORT ? -1 : 1;
 
 #define NCMP(a,b) (a == b ? 0 : (a < b ? 1 : -1))
 	if (sort_flag & LS_NAME_SORT)
 		return (rmul * strcmp(a->filename, b->filename));
 	else if (sort_flag & LS_TIME_SORT)
 		return (rmul * NCMP(a->a.mtime, b->a.mtime));
 	else if (sort_flag & LS_SIZE_SORT)
 		return (rmul * NCMP(a->a.size, b->a.size));
 
 	fatal("Unknown ls sort type");
 }
 
 /* sftp ls.1 replacement for directories */
 static int
 do_ls_dir(struct sftp_conn *conn, const char *path,
     const char *strip_path, int lflag)
 {
 	int n;
 	u_int c = 1, colspace = 0, columns = 1;
 	SFTP_DIRENT **d;
 
 	if ((n = sftp_readdir(conn, path, &d)) != 0)
 		return (n);
 
 	if (!(lflag & LS_SHORT_VIEW)) {
 		u_int m = 0, width = 80;
 		struct winsize ws;
 		char *tmp;
 
 		/* Count entries for sort and find longest filename */
 		for (n = 0; d[n] != NULL; n++) {
 			if (d[n]->filename[0] != '.' || (lflag & LS_SHOW_ALL))
 				m = MAXIMUM(m, strlen(d[n]->filename));
 		}
 
 		/* Add any subpath that also needs to be counted */
 		tmp = path_strip(path, strip_path);
 		m += strlen(tmp);
 		free(tmp);
 
 		if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
 			width = ws.ws_col;
 
 		columns = width / (m + 2);
 		columns = MAXIMUM(columns, 1);
 		colspace = width / columns;
 		colspace = MINIMUM(colspace, width);
 	}
 
 	if (lflag & SORT_FLAGS) {
 		for (n = 0; d[n] != NULL; n++)
 			;	/* count entries */
 		sort_flag = lflag & (SORT_FLAGS|LS_REVERSE_SORT);
 		qsort(d, n, sizeof(*d), sdirent_comp);
 	}
 
 	get_remote_user_groups_from_dirents(conn, d);
 	for (n = 0; d[n] != NULL && !interrupted; n++) {
 		char *tmp, *fname;
 
 		if (d[n]->filename[0] == '.' && !(lflag & LS_SHOW_ALL))
 			continue;
 
 		tmp = sftp_path_append(path, d[n]->filename);
 		fname = path_strip(tmp, strip_path);
 		free(tmp);
 
 		if (lflag & LS_LONG_VIEW) {
 			if ((lflag & (LS_NUMERIC_VIEW|LS_SI_UNITS)) != 0 ||
 			    sftp_can_get_users_groups_by_id(conn)) {
 				char *lname;
 				struct stat sb;
 
 				memset(&sb, 0, sizeof(sb));
 				attrib_to_stat(&d[n]->a, &sb);
 				lname = ls_file(fname, &sb, 1,
 				    (lflag & LS_SI_UNITS),
 				    ruser_name(sb.st_uid),
 				    rgroup_name(sb.st_gid));
 				mprintf("%s\n", lname);
 				free(lname);
 			} else
 				mprintf("%s\n", d[n]->longname);
 		} else {
 			mprintf("%-*s", colspace, fname);
 			if (c >= columns) {
 				printf("\n");
 				c = 1;
 			} else
 				c++;
 		}
 
 		free(fname);
 	}
 
 	if (!(lflag & LS_LONG_VIEW) && (c != 1))
 		printf("\n");
 
 	sftp_free_dirents(d);
 	return (0);
 }
 
 static int
 sglob_comp(const void *aa, const void *bb)
 {
 	u_int a = *(const u_int *)aa;
 	u_int b = *(const u_int *)bb;
 	const char *ap = sort_glob->gl_pathv[a];
 	const char *bp = sort_glob->gl_pathv[b];
 	const struct stat *as = sort_glob->gl_statv[a];
 	const struct stat *bs = sort_glob->gl_statv[b];
 	int rmul = sort_flag & LS_REVERSE_SORT ? -1 : 1;
 
 #define NCMP(a,b) (a == b ? 0 : (a < b ? 1 : -1))
 	if (sort_flag & LS_NAME_SORT)
 		return (rmul * strcmp(ap, bp));
 	else if (sort_flag & LS_TIME_SORT) {
 #if defined(HAVE_STRUCT_STAT_ST_MTIM)
 		if (timespeccmp(&as->st_mtim, &bs->st_mtim, ==))
 			return 0;
 		return timespeccmp(&as->st_mtim, &bs->st_mtim, <) ?
 		    rmul : -rmul;
 #elif defined(HAVE_STRUCT_STAT_ST_MTIME)
 		return (rmul * NCMP(as->st_mtime, bs->st_mtime));
 #else
 	return rmul * 1;
 #endif
 	} else if (sort_flag & LS_SIZE_SORT)
 		return (rmul * NCMP(as->st_size, bs->st_size));
 
 	fatal("Unknown ls sort type");
 }
 
 /* sftp ls.1 replacement which handles path globs */
 static int
 do_globbed_ls(struct sftp_conn *conn, const char *path,
     const char *strip_path, int lflag)
 {
 	char *fname, *lname;
 	glob_t g;
 	int err, r;
 	struct winsize ws;
 	u_int i, j, nentries, *indices = NULL, c = 1;
 	u_int colspace = 0, columns = 1, m = 0, width = 80;
 
 	memset(&g, 0, sizeof(g));
 
 	if ((r = sftp_glob(conn, path,
 	    GLOB_MARK|GLOB_NOCHECK|GLOB_BRACE|GLOB_KEEPSTAT|GLOB_NOSORT,
 	    NULL, &g)) != 0 ||
 	    (g.gl_pathc && !g.gl_matchc)) {
 		if (g.gl_pathc)
 			globfree(&g);
 		if (r == GLOB_NOSPACE) {
 			error("Can't ls: Too many matches for \"%s\"", path);
 		} else {
 			error("Can't ls: \"%s\" not found", path);
 		}
 		return -1;
 	}
 
 	if (interrupted)
 		goto out;
 
 	/*
 	 * If the glob returns a single match and it is a directory,
 	 * then just list its contents.
 	 */
 	if (g.gl_matchc == 1 && g.gl_statv[0] != NULL &&
 	    S_ISDIR(g.gl_statv[0]->st_mode)) {
 		err = do_ls_dir(conn, g.gl_pathv[0], strip_path, lflag);
 		globfree(&g);
 		return err;
 	}
 
 	if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
 		width = ws.ws_col;
 
 	if (!(lflag & LS_SHORT_VIEW)) {
 		/* Count entries for sort and find longest filename */
 		for (i = 0; g.gl_pathv[i]; i++)
 			m = MAXIMUM(m, strlen(g.gl_pathv[i]));
 
 		columns = width / (m + 2);
 		columns = MAXIMUM(columns, 1);
 		colspace = width / columns;
 	}
 
 	/*
 	 * Sorting: rather than mess with the contents of glob_t, prepare
 	 * an array of indices into it and sort that. For the usual
 	 * unsorted case, the indices are just the identity 1=1, 2=2, etc.
 	 */
 	for (nentries = 0; g.gl_pathv[nentries] != NULL; nentries++)
 		;	/* count entries */
 	indices = xcalloc(nentries, sizeof(*indices));
 	for (i = 0; i < nentries; i++)
 		indices[i] = i;
 
 	if (lflag & SORT_FLAGS) {
 		sort_glob = &g;
 		sort_flag = lflag & (SORT_FLAGS|LS_REVERSE_SORT);
 		qsort(indices, nentries, sizeof(*indices), sglob_comp);
 		sort_glob = NULL;
 	}
 
 	get_remote_user_groups_from_glob(conn, &g);
 	for (j = 0; j < nentries && !interrupted; j++) {
 		i = indices[j];
 		fname = path_strip(g.gl_pathv[i], strip_path);
 		if (lflag & LS_LONG_VIEW) {
 			if (g.gl_statv[i] == NULL) {
 				error("no stat information for %s", fname);
 				free(fname);
 				continue;
 			}
 			lname = ls_file(fname, g.gl_statv[i], 1,
 			    (lflag & LS_SI_UNITS),
 			    ruser_name(g.gl_statv[i]->st_uid),
 			    rgroup_name(g.gl_statv[i]->st_gid));
 			mprintf("%s\n", lname);
 			free(lname);
 		} else {
 			mprintf("%-*s", colspace, fname);
 			if (c >= columns) {
 				printf("\n");
 				c = 1;
 			} else
 				c++;
 		}
 		free(fname);
 	}
 
 	if (!(lflag & LS_LONG_VIEW) && (c != 1))
 		printf("\n");
 
  out:
 	if (g.gl_pathc)
 		globfree(&g);
 	free(indices);
 
 	return 0;
 }
 
 static int
 do_df(struct sftp_conn *conn, const char *path, int hflag, int iflag)
 {
 	struct sftp_statvfs st;
 	char s_used[FMT_SCALED_STRSIZE], s_avail[FMT_SCALED_STRSIZE];
 	char s_root[FMT_SCALED_STRSIZE], s_total[FMT_SCALED_STRSIZE];
 	char s_icapacity[16], s_dcapacity[16];
 
 	if (sftp_statvfs(conn, path, &st, 1) == -1)
 		return -1;
 	if (st.f_files == 0)
 		strlcpy(s_icapacity, "ERR", sizeof(s_icapacity));
 	else {
 		snprintf(s_icapacity, sizeof(s_icapacity), "%3llu%%",
 		    (unsigned long long)(100 * (st.f_files - st.f_ffree) /
 		    st.f_files));
 	}
 	if (st.f_blocks == 0)
 		strlcpy(s_dcapacity, "ERR", sizeof(s_dcapacity));
 	else {
 		snprintf(s_dcapacity, sizeof(s_dcapacity), "%3llu%%",
 		    (unsigned long long)(100 * (st.f_blocks - st.f_bfree) /
 		    st.f_blocks));
 	}
 	if (iflag) {
 		printf("     Inodes        Used       Avail      "
 		    "(root)    %%Capacity\n");
 		printf("%11llu %11llu %11llu %11llu         %s\n",
 		    (unsigned long long)st.f_files,
 		    (unsigned long long)(st.f_files - st.f_ffree),
 		    (unsigned long long)st.f_favail,
 		    (unsigned long long)st.f_ffree, s_icapacity);
 	} else if (hflag) {
 		strlcpy(s_used, "error", sizeof(s_used));
 		strlcpy(s_avail, "error", sizeof(s_avail));
 		strlcpy(s_root, "error", sizeof(s_root));
 		strlcpy(s_total, "error", sizeof(s_total));
 		fmt_scaled((st.f_blocks - st.f_bfree) * st.f_frsize, s_used);
 		fmt_scaled(st.f_bavail * st.f_frsize, s_avail);
 		fmt_scaled(st.f_bfree * st.f_frsize, s_root);
 		fmt_scaled(st.f_blocks * st.f_frsize, s_total);
 		printf("    Size     Used    Avail   (root)    %%Capacity\n");
 		printf("%7sB %7sB %7sB %7sB         %s\n",
 		    s_total, s_used, s_avail, s_root, s_dcapacity);
 	} else {
 		printf("        Size         Used        Avail       "
 		    "(root)    %%Capacity\n");
 		printf("%12llu %12llu %12llu %12llu         %s\n",
 		    (unsigned long long)(st.f_frsize * st.f_blocks / 1024),
 		    (unsigned long long)(st.f_frsize *
 		    (st.f_blocks - st.f_bfree) / 1024),
 		    (unsigned long long)(st.f_frsize * st.f_bavail / 1024),
 		    (unsigned long long)(st.f_frsize * st.f_bfree / 1024),
 		    s_dcapacity);
 	}
 	return 0;
 }
 
 /*
  * Undo escaping of glob sequences in place. Used to undo extra escaping
  * applied in makeargv() when the string is destined for a function that
  * does not glob it.
  */
 static void
 undo_glob_escape(char *s)
 {
 	size_t i, j;
 
 	for (i = j = 0;;) {
 		if (s[i] == '\0') {
 			s[j] = '\0';
 			return;
 		}
 		if (s[i] != '\\') {
 			s[j++] = s[i++];
 			continue;
 		}
 		/* s[i] == '\\' */
 		++i;
 		switch (s[i]) {
 		case '?':
 		case '[':
 		case '*':
 		case '\\':
 			s[j++] = s[i++];
 			break;
 		case '\0':
 			s[j++] = '\\';
 			s[j] = '\0';
 			return;
 		default:
 			s[j++] = '\\';
 			s[j++] = s[i++];
 			break;
 		}
 	}
 }
 
 /*
  * Split a string into an argument vector using sh(1)-style quoting,
  * comment and escaping rules, but with some tweaks to handle glob(3)
  * wildcards.
  * The "sloppy" flag allows for recovery from missing terminating quote, for
  * use in parsing incomplete commandlines during tab autocompletion.
  *
  * Returns NULL on error or a NULL-terminated array of arguments.
  *
  * If "lastquote" is not NULL, the quoting character used for the last
  * argument is placed in *lastquote ("\0", "'" or "\"").
  *
  * If "terminated" is not NULL, *terminated will be set to 1 when the
  * last argument's quote has been properly terminated or 0 otherwise.
  * This parameter is only of use if "sloppy" is set.
  */
 #define MAXARGS		128
 #define MAXARGLEN	8192
 static char **
 makeargv(const char *arg, int *argcp, int sloppy, char *lastquote,
     u_int *terminated)
 {
 	int argc, quot;
 	size_t i, j;
 	static char argvs[MAXARGLEN];
 	static char *argv[MAXARGS + 1];
 	enum { MA_START, MA_SQUOTE, MA_DQUOTE, MA_UNQUOTED } state, q;
 
 	*argcp = argc = 0;
 	if (strlen(arg) > sizeof(argvs) - 1) {
  args_too_longs:
 		error("string too long");
 		return NULL;
 	}
 	if (terminated != NULL)
 		*terminated = 1;
 	if (lastquote != NULL)
 		*lastquote = '\0';
 	state = MA_START;
 	i = j = 0;
 	for (;;) {
 		if ((size_t)argc >= sizeof(argv) / sizeof(*argv)){
 			error("Too many arguments.");
 			return NULL;
 		}
 		if (isspace((unsigned char)arg[i])) {
 			if (state == MA_UNQUOTED) {
 				/* Terminate current argument */
 				argvs[j++] = '\0';
 				argc++;
 				state = MA_START;
 			} else if (state != MA_START)
 				argvs[j++] = arg[i];
 		} else if (arg[i] == '"' || arg[i] == '\'') {
 			q = arg[i] == '"' ? MA_DQUOTE : MA_SQUOTE;
 			if (state == MA_START) {
 				argv[argc] = argvs + j;
 				state = q;
 				if (lastquote != NULL)
 					*lastquote = arg[i];
 			} else if (state == MA_UNQUOTED)
 				state = q;
 			else if (state == q)
 				state = MA_UNQUOTED;
 			else
 				argvs[j++] = arg[i];
 		} else if (arg[i] == '\\') {
 			if (state == MA_SQUOTE || state == MA_DQUOTE) {
 				quot = state == MA_SQUOTE ? '\'' : '"';
 				/* Unescape quote we are in */
 				/* XXX support \n and friends? */
 				if (arg[i + 1] == quot) {
 					i++;
 					argvs[j++] = arg[i];
 				} else if (arg[i + 1] == '?' ||
 				    arg[i + 1] == '[' || arg[i + 1] == '*') {
 					/*
 					 * Special case for sftp: append
 					 * double-escaped glob sequence -
 					 * glob will undo one level of
 					 * escaping. NB. string can grow here.
 					 */
 					if (j >= sizeof(argvs) - 5)
 						goto args_too_longs;
 					argvs[j++] = '\\';
 					argvs[j++] = arg[i++];
 					argvs[j++] = '\\';
 					argvs[j++] = arg[i];
 				} else {
 					argvs[j++] = arg[i++];
 					argvs[j++] = arg[i];
 				}
 			} else {
 				if (state == MA_START) {
 					argv[argc] = argvs + j;
 					state = MA_UNQUOTED;
 					if (lastquote != NULL)
 						*lastquote = '\0';
 				}
 				if (arg[i + 1] == '?' || arg[i + 1] == '[' ||
 				    arg[i + 1] == '*' || arg[i + 1] == '\\') {
 					/*
 					 * Special case for sftp: append
 					 * escaped glob sequence -
 					 * glob will undo one level of
 					 * escaping.
 					 */
 					argvs[j++] = arg[i++];
 					argvs[j++] = arg[i];
 				} else {
 					/* Unescape everything */
 					/* XXX support \n and friends? */
 					i++;
 					argvs[j++] = arg[i];
 				}
 			}
 		} else if (arg[i] == '#') {
 			if (state == MA_SQUOTE || state == MA_DQUOTE)
 				argvs[j++] = arg[i];
 			else
 				goto string_done;
 		} else if (arg[i] == '\0') {
 			if (state == MA_SQUOTE || state == MA_DQUOTE) {
 				if (sloppy) {
 					state = MA_UNQUOTED;
 					if (terminated != NULL)
 						*terminated = 0;
 					goto string_done;
 				}
 				error("Unterminated quoted argument");
 				return NULL;
 			}
  string_done:
 			if (state == MA_UNQUOTED) {
 				argvs[j++] = '\0';
 				argc++;
 			}
 			break;
 		} else {
 			if (state == MA_START) {
 				argv[argc] = argvs + j;
 				state = MA_UNQUOTED;
 				if (lastquote != NULL)
 					*lastquote = '\0';
 			}
 			if ((state == MA_SQUOTE || state == MA_DQUOTE) &&
 			    (arg[i] == '?' || arg[i] == '[' || arg[i] == '*')) {
 				/*
 				 * Special case for sftp: escape quoted
 				 * glob(3) wildcards. NB. string can grow
 				 * here.
 				 */
 				if (j >= sizeof(argvs) - 3)
 					goto args_too_longs;
 				argvs[j++] = '\\';
 				argvs[j++] = arg[i];
 			} else
 				argvs[j++] = arg[i];
 		}
 		i++;
 	}
 	*argcp = argc;
 	return argv;
 }
 
 static int
 parse_args(const char **cpp, int *ignore_errors, int *disable_echo, int *aflag,
 	  int *fflag, int *hflag, int *iflag, int *lflag, int *pflag,
 	  int *rflag, int *sflag,
     unsigned long *n_arg, char **path1, char **path2)
 {
 	const char *cmd, *cp = *cpp;
 	char *cp2, **argv;
 	int base = 0;
 	long long ll;
 	int path1_mandatory = 0, i, cmdnum, optidx, argc;
 
 	/* Skip leading whitespace */
 	cp = cp + strspn(cp, WHITESPACE);
 
 	/*
 	 * Check for leading '-' (disable error processing) and '@' (suppress
 	 * command echo)
 	 */
 	*ignore_errors = 0;
 	*disable_echo = 0;
 	for (;*cp != '\0'; cp++) {
 		if (*cp == '-') {
 			*ignore_errors = 1;
 		} else if (*cp == '@') {
 			*disable_echo = 1;
 		} else {
 			/* all other characters terminate prefix processing */
 			break;
 		}
 	}
 	cp = cp + strspn(cp, WHITESPACE);
 
 	/* Ignore blank lines and lines which begin with comment '#' char */
 	if (*cp == '\0' || *cp == '#')
 		return (0);
 
 	if ((argv = makeargv(cp, &argc, 0, NULL, NULL)) == NULL)
 		return -1;
 
 	/* Figure out which command we have */
 	for (i = 0; cmds[i].c != NULL; i++) {
 		if (argv[0] != NULL && strcasecmp(cmds[i].c, argv[0]) == 0)
 			break;
 	}
 	cmdnum = cmds[i].n;
 	cmd = cmds[i].c;
 
 	/* Special case */
 	if (*cp == '!') {
 		cp++;
 		cmdnum = I_SHELL;
 	} else if (cmdnum == -1) {
 		error("Invalid command.");
 		return -1;
 	}
 
 	/* Get arguments and parse flags */
 	*aflag = *fflag = *hflag = *iflag = *lflag = *pflag = 0;
 	*rflag = *sflag = 0;
 	*path1 = *path2 = NULL;
 	optidx = 1;
 	switch (cmdnum) {
 	case I_GET:
 	case I_REGET:
 	case I_REPUT:
 	case I_PUT:
 		if ((optidx = parse_getput_flags(cmd, argv, argc,
 		    aflag, fflag, pflag, rflag)) == -1)
 			return -1;
 		/* Get first pathname (mandatory) */
 		if (argc - optidx < 1) {
 			error("You must specify at least one path after a "
 			    "%s command.", cmd);
 			return -1;
 		}
 		*path1 = xstrdup(argv[optidx]);
 		/* Get second pathname (optional) */
 		if (argc - optidx > 1) {
 			*path2 = xstrdup(argv[optidx + 1]);
 			/* Destination is not globbed */
 			undo_glob_escape(*path2);
 		}
 		break;
 	case I_LINK:
 		if ((optidx = parse_link_flags(cmd, argv, argc, sflag)) == -1)
 			return -1;
 		goto parse_two_paths;
 	case I_COPY:
 		if ((optidx = parse_no_flags(cmd, argv, argc)) == -1)
 			return -1;
 		goto parse_two_paths;
 	case I_RENAME:
 		if ((optidx = parse_rename_flags(cmd, argv, argc, lflag)) == -1)
 			return -1;
 		goto parse_two_paths;
 	case I_SYMLINK:
 		if ((optidx = parse_no_flags(cmd, argv, argc)) == -1)
 			return -1;
  parse_two_paths:
 		if (argc - optidx < 2) {
 			error("You must specify two paths after a %s "
 			    "command.", cmd);
 			return -1;
 		}
 		*path1 = xstrdup(argv[optidx]);
 		*path2 = xstrdup(argv[optidx + 1]);
 		/* Paths are not globbed */
 		undo_glob_escape(*path1);
 		undo_glob_escape(*path2);
 		break;
 	case I_RM:
 	case I_MKDIR:
 	case I_RMDIR:
 	case I_LMKDIR:
 		path1_mandatory = 1;
 		/* FALLTHROUGH */
 	case I_CHDIR:
 	case I_LCHDIR:
 		if ((optidx = parse_no_flags(cmd, argv, argc)) == -1)
 			return -1;
 		/* Get pathname (mandatory) */
 		if (argc - optidx < 1) {
 			if (!path1_mandatory)
 				break; /* return a NULL path1 */
 			error("You must specify a path after a %s command.",
 			    cmd);
 			return -1;
 		}
 		*path1 = xstrdup(argv[optidx]);
 		/* Only "rm" globs */
 		if (cmdnum != I_RM)
 			undo_glob_escape(*path1);
 		break;
 	case I_DF:
 		if ((optidx = parse_df_flags(cmd, argv, argc, hflag,
 		    iflag)) == -1)
 			return -1;
 		/* Default to current directory if no path specified */
 		if (argc - optidx < 1)
 			*path1 = NULL;
 		else {
 			*path1 = xstrdup(argv[optidx]);
 			undo_glob_escape(*path1);
 		}
 		break;
 	case I_LS:
 		if ((optidx = parse_ls_flags(argv, argc, lflag)) == -1)
 			return(-1);
 		/* Path is optional */
 		if (argc - optidx > 0)
 			*path1 = xstrdup(argv[optidx]);
 		break;
 	case I_LLS:
 		/* Skip ls command and following whitespace */
 		cp = cp + strlen(cmd) + strspn(cp, WHITESPACE);
 	case I_SHELL:
 		/* Uses the rest of the line */
 		break;
 	case I_LUMASK:
 	case I_CHMOD:
 		base = 8;
 		/* FALLTHROUGH */
 	case I_CHOWN:
 	case I_CHGRP:
 		if ((optidx = parse_ch_flags(cmd, argv, argc, hflag)) == -1)
 			return -1;
 		/* Get numeric arg (mandatory) */
 		if (argc - optidx < 1)
 			goto need_num_arg;
 		errno = 0;
 		ll = strtoll(argv[optidx], &cp2, base);
 		if (cp2 == argv[optidx] || *cp2 != '\0' ||
 		    ((ll == LLONG_MIN || ll == LLONG_MAX) && errno == ERANGE) ||
 		    ll < 0 || ll > UINT32_MAX) {
  need_num_arg:
 			error("You must supply a numeric argument "
 			    "to the %s command.", cmd);
 			return -1;
 		}
 		*n_arg = ll;
 		if (cmdnum == I_LUMASK)
 			break;
 		/* Get pathname (mandatory) */
 		if (argc - optidx < 2) {
 			error("You must specify a path after a %s command.",
 			    cmd);
 			return -1;
 		}
 		*path1 = xstrdup(argv[optidx + 1]);
 		break;
 	case I_QUIT:
 	case I_PWD:
 	case I_LPWD:
 	case I_HELP:
 	case I_VERSION:
 	case I_PROGRESS:
 		if ((optidx = parse_no_flags(cmd, argv, argc)) == -1)
 			return -1;
 		break;
 	default:
 		fatal("Command not implemented");
 	}
 
 	*cpp = cp;
 	return(cmdnum);
 }
 
 static int
 parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
     const char *startdir, int err_abort, int echo_command)
 {
 	const char *ocmd = cmd;
 	char *path1, *path2, *tmp;
 	int ignore_errors = 0, disable_echo = 1;
 	int aflag = 0, fflag = 0, hflag = 0, iflag = 0;
 	int lflag = 0, pflag = 0, rflag = 0, sflag = 0;
 	int cmdnum, i;
 	unsigned long n_arg = 0;
 	Attrib a, aa;
 	char path_buf[PATH_MAX];
 	int err = 0;
 	glob_t g;
 
 	path1 = path2 = NULL;
 	cmdnum = parse_args(&cmd, &ignore_errors, &disable_echo, &aflag, &fflag,
 	    &hflag, &iflag, &lflag, &pflag, &rflag, &sflag, &n_arg,
 	    &path1, &path2);
 	if (ignore_errors != 0)
 		err_abort = 0;
 
 	if (echo_command && !disable_echo)
 		mprintf("sftp> %s\n", ocmd);
 
 	memset(&g, 0, sizeof(g));
 
 	/* Perform command */
 	switch (cmdnum) {
 	case 0:
 		/* Blank line */
 		break;
 	case -1:
 		/* Unrecognized command */
 		err = -1;
 		break;
 	case I_REGET:
 		aflag = 1;
 		/* FALLTHROUGH */
 	case I_GET:
 		err = process_get(conn, path1, path2, *pwd, pflag,
 		    rflag, aflag, fflag);
 		break;
 	case I_REPUT:
 		aflag = 1;
 		/* FALLTHROUGH */
 	case I_PUT:
 		err = process_put(conn, path1, path2, *pwd, pflag,
 		    rflag, aflag, fflag);
 		break;
 	case I_COPY:
 		path1 = sftp_make_absolute(path1, *pwd);
 		path2 = sftp_make_absolute(path2, *pwd);
 		err = sftp_copy(conn, path1, path2);
 		break;
 	case I_RENAME:
 		path1 = sftp_make_absolute(path1, *pwd);
 		path2 = sftp_make_absolute(path2, *pwd);
 		err = sftp_rename(conn, path1, path2, lflag);
 		break;
 	case I_SYMLINK:
 		sflag = 1;
 		/* FALLTHROUGH */
 	case I_LINK:
 		if (!sflag)
 			path1 = sftp_make_absolute(path1, *pwd);
 		path2 = sftp_make_absolute(path2, *pwd);
 		err = (sflag ? sftp_symlink : sftp_hardlink)(conn,
 		    path1, path2);
 		break;
 	case I_RM:
 		path1 = make_absolute_pwd_glob(path1, *pwd);
 		sftp_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
 		for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 			if (!quiet)
 				mprintf("Removing %s\n", g.gl_pathv[i]);
 			err = sftp_rm(conn, g.gl_pathv[i]);
 			if (err != 0 && err_abort)
 				break;
 		}
 		break;
 	case I_MKDIR:
 		path1 = sftp_make_absolute(path1, *pwd);
 		attrib_clear(&a);
 		a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
 		a.perm = 0777;
 		err = sftp_mkdir(conn, path1, &a, 1);
 		break;
 	case I_RMDIR:
 		path1 = sftp_make_absolute(path1, *pwd);
 		err = sftp_rmdir(conn, path1);
 		break;
 	case I_CHDIR:
 		if (path1 == NULL || *path1 == '\0')
 			path1 = xstrdup(startdir);
 		path1 = sftp_make_absolute(path1, *pwd);
 		if ((tmp = sftp_realpath(conn, path1)) == NULL) {
 			err = 1;
 			break;
 		}
 		if (sftp_stat(conn, tmp, 0, &aa) != 0) {
 			free(tmp);
 			err = 1;
 			break;
 		}
 		if (!(aa.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
 			error("Can't change directory: Can't check target");
 			free(tmp);
 			err = 1;
 			break;
 		}
 		if (!S_ISDIR(aa.perm)) {
 			error("Can't change directory: \"%s\" is not "
 			    "a directory", tmp);
 			free(tmp);
 			err = 1;
 			break;
 		}
 		free(*pwd);
 		*pwd = tmp;
 		break;
 	case I_LS:
 		if (!path1) {
 			do_ls_dir(conn, *pwd, *pwd, lflag);
 			break;
 		}
 
 		/* Strip pwd off beginning of non-absolute paths */
 		tmp = NULL;
 		if (!path_absolute(path1))
 			tmp = *pwd;
 
 		path1 = make_absolute_pwd_glob(path1, *pwd);
 		err = do_globbed_ls(conn, path1, tmp, lflag);
 		break;
 	case I_DF:
 		/* Default to current directory if no path specified */
 		if (path1 == NULL)
 			path1 = xstrdup(*pwd);
 		path1 = sftp_make_absolute(path1, *pwd);
 		err = do_df(conn, path1, hflag, iflag);
 		break;
 	case I_LCHDIR:
 		if (path1 == NULL || *path1 == '\0')
 			path1 = xstrdup("~");
 		tmp = tilde_expand_filename(path1, getuid());
 		free(path1);
 		path1 = tmp;
 		if (chdir(path1) == -1) {
 			error("Couldn't change local directory to "
 			    "\"%s\": %s", path1, strerror(errno));
 			err = 1;
 		}
 		break;
 	case I_LMKDIR:
 		if (mkdir(path1, 0777) == -1) {
 			error("Couldn't create local directory "
 			    "\"%s\": %s", path1, strerror(errno));
 			err = 1;
 		}
 		break;
 	case I_LLS:
 		local_do_ls(cmd);
 		break;
 	case I_SHELL:
 		local_do_shell(cmd);
 		break;
 	case I_LUMASK:
 		umask(n_arg);
 		printf("Local umask: %03lo\n", n_arg);
 		break;
 	case I_CHMOD:
 		path1 = make_absolute_pwd_glob(path1, *pwd);
 		attrib_clear(&a);
 		a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
 		a.perm = n_arg;
 		sftp_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
 		for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 			if (!quiet)
 				mprintf("Changing mode on %s\n",
 				    g.gl_pathv[i]);
 			err = (hflag ? sftp_lsetstat : sftp_setstat)(conn,
 			    g.gl_pathv[i], &a);
 			if (err != 0 && err_abort)
 				break;
 		}
 		break;
 	case I_CHOWN:
 	case I_CHGRP:
 		path1 = make_absolute_pwd_glob(path1, *pwd);
 		sftp_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
 		for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 			if ((hflag ? sftp_lstat : sftp_stat)(conn,
 			    g.gl_pathv[i], 0, &aa) != 0) {
 				if (err_abort) {
 					err = -1;
 					break;
 				} else
 					continue;
 			}
 			if (!(aa.flags & SSH2_FILEXFER_ATTR_UIDGID)) {
 				error("Can't get current ownership of "
 				    "remote file \"%s\"", g.gl_pathv[i]);
 				if (err_abort) {
 					err = -1;
 					break;
 				} else
 					continue;
 			}
 			aa.flags &= SSH2_FILEXFER_ATTR_UIDGID;
 			if (cmdnum == I_CHOWN) {
 				if (!quiet)
 					mprintf("Changing owner on %s\n",
 					    g.gl_pathv[i]);
 				aa.uid = n_arg;
 			} else {
 				if (!quiet)
 					mprintf("Changing group on %s\n",
 					    g.gl_pathv[i]);
 				aa.gid = n_arg;
 			}
 			err = (hflag ? sftp_lsetstat : sftp_setstat)(conn,
 			    g.gl_pathv[i], &aa);
 			if (err != 0 && err_abort)
 				break;
 		}
 		break;
 	case I_PWD:
 		mprintf("Remote working directory: %s\n", *pwd);
 		break;
 	case I_LPWD:
 		if (!getcwd(path_buf, sizeof(path_buf))) {
 			error("Couldn't get local cwd: %s", strerror(errno));
 			err = -1;
 			break;
 		}
 		mprintf("Local working directory: %s\n", path_buf);
 		break;
 	case I_QUIT:
 		/* Processed below */
 		break;
 	case I_HELP:
 		help();
 		break;
 	case I_VERSION:
 		printf("SFTP protocol version %u\n", sftp_proto_version(conn));
 		break;
 	case I_PROGRESS:
 		showprogress = !showprogress;
 		if (showprogress)
 			printf("Progress meter enabled\n");
 		else
 			printf("Progress meter disabled\n");
 		break;
 	default:
 		fatal("%d is not implemented", cmdnum);
 	}
 
 	if (g.gl_pathc)
 		globfree(&g);
 	free(path1);
 	free(path2);
 
 	/* If an unignored error occurs in batch mode we should abort. */
 	if (err_abort && err != 0)
 		return (-1);
 	else if (cmdnum == I_QUIT)
 		return (1);
 
 	return (0);
 }
 
 #ifdef USE_LIBEDIT
 static char *
 prompt(EditLine *el)
 {
 	return ("sftp> ");
 }
 
 /* Display entries in 'list' after skipping the first 'len' chars */
 static void
 complete_display(char **list, u_int len)
 {
 	u_int y, m = 0, width = 80, columns = 1, colspace = 0, llen;
 	struct winsize ws;
 	char *tmp;
 
 	/* Count entries for sort and find longest */
 	for (y = 0; list[y]; y++)
 		m = MAXIMUM(m, strlen(list[y]));
 
 	if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
 		width = ws.ws_col;
 
 	m = m > len ? m - len : 0;
 	columns = width / (m + 2);
 	columns = MAXIMUM(columns, 1);
 	colspace = width / columns;
 	colspace = MINIMUM(colspace, width);
 
 	printf("\n");
 	m = 1;
 	for (y = 0; list[y]; y++) {
 		llen = strlen(list[y]);
 		tmp = llen > len ? list[y] + len : "";
 		mprintf("%-*s", colspace, tmp);
 		if (m >= columns) {
 			printf("\n");
 			m = 1;
 		} else
 			m++;
 	}
 	printf("\n");
 }
 
 /*
  * Given a "list" of words that begin with a common prefix of "word",
  * attempt to find an autocompletion to extends "word" by the next
  * characters common to all entries in "list".
  */
 static char *
 complete_ambiguous(const char *word, char **list, size_t count)
 {
 	if (word == NULL)
 		return NULL;
 
 	if (count > 0) {
 		u_int y, matchlen = strlen(list[0]);
 
 		/* Find length of common stem */
 		for (y = 1; list[y]; y++) {
 			u_int x;
 
 			for (x = 0; x < matchlen; x++)
 				if (list[0][x] != list[y][x])
 					break;
 
 			matchlen = x;
 		}
 
 		if (matchlen > strlen(word)) {
 			char *tmp = xstrdup(list[0]);
 
 			tmp[matchlen] = '\0';
 			return tmp;
 		}
 	}
 
 	return xstrdup(word);
 }
 
 /* Autocomplete a sftp command */
 static int
 complete_cmd_parse(EditLine *el, char *cmd, int lastarg, char quote,
     int terminated)
 {
 	u_int y, count = 0, cmdlen, tmplen;
 	char *tmp, **list, argterm[3];
 	const LineInfo *lf;
 
 	list = xcalloc((sizeof(cmds) / sizeof(*cmds)) + 1, sizeof(char *));
 
 	/* No command specified: display all available commands */
 	if (cmd == NULL) {
 		for (y = 0; cmds[y].c; y++)
 			list[count++] = xstrdup(cmds[y].c);
 
 		list[count] = NULL;
 		complete_display(list, 0);
 
 		for (y = 0; list[y] != NULL; y++)
 			free(list[y]);
 		free(list);
 		return count;
 	}
 
 	/* Prepare subset of commands that start with "cmd" */
 	cmdlen = strlen(cmd);
 	for (y = 0; cmds[y].c; y++)  {
 		if (!strncasecmp(cmd, cmds[y].c, cmdlen))
 			list[count++] = xstrdup(cmds[y].c);
 	}
 	list[count] = NULL;
 
 	if (count == 0) {
 		free(list);
 		return 0;
 	}
 
 	/* Complete ambiguous command */
 	tmp = complete_ambiguous(cmd, list, count);
 	if (count > 1)
 		complete_display(list, 0);
 
 	for (y = 0; list[y]; y++)
 		free(list[y]);
 	free(list);
 
 	if (tmp != NULL) {
 		tmplen = strlen(tmp);
 		cmdlen = strlen(cmd);
 		/* If cmd may be extended then do so */
 		if (tmplen > cmdlen)
 			if (el_insertstr(el, tmp + cmdlen) == -1)
 				fatal("el_insertstr failed.");
 		lf = el_line(el);
 		/* Terminate argument cleanly */
 		if (count == 1) {
 			y = 0;
 			if (!terminated)
 				argterm[y++] = quote;
 			if (lastarg || *(lf->cursor) != ' ')
 				argterm[y++] = ' ';
 			argterm[y] = '\0';
 			if (y > 0 && el_insertstr(el, argterm) == -1)
 				fatal("el_insertstr failed.");
 		}
 		free(tmp);
 	}
 
 	return count;
 }
 
 /*
  * Determine whether a particular sftp command's arguments (if any) represent
  * local or remote files. The "cmdarg" argument specifies the actual argument
  * and accepts values 1 or 2.
  */
 static int
 complete_is_remote(char *cmd, int cmdarg) {
 	int i;
 
 	if (cmd == NULL)
 		return -1;
 
 	for (i = 0; cmds[i].c; i++) {
 		if (!strncasecmp(cmd, cmds[i].c, strlen(cmds[i].c))) {
 			if (cmdarg == 1)
 				return cmds[i].t;
 			else if (cmdarg == 2)
 				return cmds[i].t2;
 			break;
 		}
 	}
 
 	return -1;
 }
 
 /* Autocomplete a filename "file" */
 static int
 complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path,
     char *file, int remote, int lastarg, char quote, int terminated)
 {
 	glob_t g;
 	char *tmp, *tmp2, ins[8];
 	u_int i, hadglob, pwdlen, len, tmplen, filelen, cesc, isesc, isabs;
 	int clen;
 	const LineInfo *lf;
 
 	/* Glob from "file" location */
 	if (file == NULL)
 		tmp = xstrdup("*");
 	else
 		xasprintf(&tmp, "%s*", file);
 
 	/* Check if the path is absolute. */
 	isabs = path_absolute(tmp);
 
 	memset(&g, 0, sizeof(g));
 	if (remote != LOCAL) {
 		tmp = make_absolute_pwd_glob(tmp, remote_path);
 		sftp_glob(conn, tmp, GLOB_DOOFFS|GLOB_MARK, NULL, &g);
 	} else
 		(void)glob(tmp, GLOB_DOOFFS|GLOB_MARK, NULL, &g);
 
 	/* Determine length of pwd so we can trim completion display */
 	for (hadglob = tmplen = pwdlen = 0; tmp[tmplen] != 0; tmplen++) {
 		/* Terminate counting on first unescaped glob metacharacter */
 		if (tmp[tmplen] == '*' || tmp[tmplen] == '?') {
 			if (tmp[tmplen] != '*' || tmp[tmplen + 1] != '\0')
 				hadglob = 1;
 			break;
 		}
 		if (tmp[tmplen] == '\\' && tmp[tmplen + 1] != '\0')
 			tmplen++;
 		if (tmp[tmplen] == '/')
 			pwdlen = tmplen + 1;	/* track last seen '/' */
 	}
 	free(tmp);
 	tmp = NULL;
 
 	if (g.gl_matchc == 0)
 		goto out;
 
 	if (g.gl_matchc > 1)
 		complete_display(g.gl_pathv, pwdlen);
 
 	/* Don't try to extend globs */
 	if (file == NULL || hadglob)
 		goto out;
 
 	tmp2 = complete_ambiguous(file, g.gl_pathv, g.gl_matchc);
 	tmp = path_strip(tmp2, isabs ? NULL : remote_path);
 	free(tmp2);
 
 	if (tmp == NULL)
 		goto out;
 
 	tmplen = strlen(tmp);
 	filelen = strlen(file);
 
 	/* Count the number of escaped characters in the input string. */
 	cesc = isesc = 0;
 	for (i = 0; i < filelen; i++) {
 		if (!isesc && file[i] == '\\' && i + 1 < filelen){
 			isesc = 1;
 			cesc++;
 		} else
 			isesc = 0;
 	}
 
 	if (tmplen > (filelen - cesc)) {
 		tmp2 = tmp + filelen - cesc;
 		len = strlen(tmp2);
 		/* quote argument on way out */
 		for (i = 0; i < len; i += clen) {
 			if ((clen = mblen(tmp2 + i, len - i)) < 0 ||
 			    (size_t)clen > sizeof(ins) - 2)
 				fatal("invalid multibyte character");
 			ins[0] = '\\';
 			memcpy(ins + 1, tmp2 + i, clen);
 			ins[clen + 1] = '\0';
 			switch (tmp2[i]) {
 			case '\'':
 			case '"':
 			case '\\':
 			case '\t':
 			case '[':
 			case ' ':
 			case '#':
 			case '*':
 				if (quote == '\0' || tmp2[i] == quote) {
 					if (el_insertstr(el, ins) == -1)
 						fatal("el_insertstr "
 						    "failed.");
 					break;
 				}
 				/* FALLTHROUGH */
 			default:
 				if (el_insertstr(el, ins + 1) == -1)
 					fatal("el_insertstr failed.");
 				break;
 			}
 		}
 	}
 
 	lf = el_line(el);
 	if (g.gl_matchc == 1) {
 		i = 0;
 		if (!terminated && quote != '\0')
 			ins[i++] = quote;
 		if (*(lf->cursor - 1) != '/' &&
 		    (lastarg || *(lf->cursor) != ' '))
 			ins[i++] = ' ';
 		ins[i] = '\0';
 		if (i > 0 && el_insertstr(el, ins) == -1)
 			fatal("el_insertstr failed.");
 	}
 	free(tmp);
 
  out:
 	globfree(&g);
 	return g.gl_matchc;
 }
 
 /* tab-completion hook function, called via libedit */
 static unsigned char
 complete(EditLine *el, int ch)
 {
 	char **argv, *line, quote;
 	int argc, carg;
 	u_int cursor, len, terminated, ret = CC_ERROR;
 	const LineInfo *lf;
 	struct complete_ctx *complete_ctx;
 
 	lf = el_line(el);
 	if (el_get(el, EL_CLIENTDATA, (void**)&complete_ctx) != 0)
 		fatal_f("el_get failed");
 
 	/* Figure out which argument the cursor points to */
 	cursor = lf->cursor - lf->buffer;
 	line = xmalloc(cursor + 1);
 	memcpy(line, lf->buffer, cursor);
 	line[cursor] = '\0';
 	argv = makeargv(line, &carg, 1, &quote, &terminated);
 	free(line);
 
 	/* Get all the arguments on the line */
 	len = lf->lastchar - lf->buffer;
 	line = xmalloc(len + 1);
 	memcpy(line, lf->buffer, len);
 	line[len] = '\0';
 	argv = makeargv(line, &argc, 1, NULL, NULL);
 
 	/* Ensure cursor is at EOL or a argument boundary */
 	if (line[cursor] != ' ' && line[cursor] != '\0' &&
 	    line[cursor] != '\n') {
 		free(line);
 		return ret;
 	}
 
 	if (carg == 0) {
 		/* Show all available commands */
 		complete_cmd_parse(el, NULL, argc == carg, '\0', 1);
 		ret = CC_REDISPLAY;
 	} else if (carg == 1 && cursor > 0 && line[cursor - 1] != ' ')  {
 		/* Handle the command parsing */
 		if (complete_cmd_parse(el, argv[0], argc == carg,
 		    quote, terminated) != 0)
 			ret = CC_REDISPLAY;
 	} else if (carg >= 1) {
 		/* Handle file parsing */
 		int remote = 0;
 		int i = 0, cmdarg = 0;
 		char *filematch = NULL;
 
 		if (carg > 1 && line[cursor-1] != ' ')
 			filematch = argv[carg - 1];
 
 		for (i = 1; i < carg; i++) {
 			/* Skip flags */
 			if (argv[i][0] != '-')
 				cmdarg++;
 		}
 
 		/*
 		 * If previous argument is complete, then offer completion
 		 * on the next one.
 		 */
 		if (line[cursor - 1] == ' ')
 			cmdarg++;
 
 		remote = complete_is_remote(argv[0], cmdarg);
 
 		if ((remote == REMOTE || remote == LOCAL) &&
 		    complete_match(el, complete_ctx->conn,
 		    *complete_ctx->remote_pathp, filematch,
 		    remote, carg == argc, quote, terminated) != 0)
 			ret = CC_REDISPLAY;
 	}
 
 	free(line);
 	return ret;
 }
 #endif /* USE_LIBEDIT */
 
 static int
 interactive_loop(struct sftp_conn *conn, char *file1, char *file2)
 {
 	char *remote_path;
 	char *dir = NULL, *startdir = NULL;
 	char cmd[2048];
 	int err, interactive;
 	EditLine *el = NULL;
 #ifdef USE_LIBEDIT
 	History *hl = NULL;
 	HistEvent hev;
 	extern char *__progname;
 	struct complete_ctx complete_ctx;
 
 	if (!batchmode && isatty(STDIN_FILENO)) {
 		if ((el = el_init(__progname, stdin, stdout, stderr)) == NULL)
 			fatal("Couldn't initialise editline");
 		if ((hl = history_init()) == NULL)
 			fatal("Couldn't initialise editline history");
 		history(hl, &hev, H_SETSIZE, 100);
 		el_set(el, EL_HIST, history, hl);
 
 		el_set(el, EL_PROMPT, prompt);
 		el_set(el, EL_EDITOR, "emacs");
 		el_set(el, EL_TERMINAL, NULL);
 		el_set(el, EL_SIGNAL, 1);
 		el_source(el, NULL);
 
 		/* Tab Completion */
 		el_set(el, EL_ADDFN, "ftp-complete",
 		    "Context sensitive argument completion", complete);
 		complete_ctx.conn = conn;
 		complete_ctx.remote_pathp = &remote_path;
 		el_set(el, EL_CLIENTDATA, (void*)&complete_ctx);
 		el_set(el, EL_BIND, "^I", "ftp-complete", NULL);
 		/* enable ctrl-left-arrow and ctrl-right-arrow */
 		el_set(el, EL_BIND, "\\e[1;5C", "em-next-word", NULL);
 		el_set(el, EL_BIND, "\\e\\e[C", "em-next-word", NULL);
 		el_set(el, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL);
 		el_set(el, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL);
 		/* make ^w match ksh behaviour */
 		el_set(el, EL_BIND, "^w", "ed-delete-prev-word", NULL);
 	}
 #endif /* USE_LIBEDIT */
 
 	if ((remote_path = sftp_realpath(conn, ".")) == NULL)
 		fatal("Need cwd");
 	startdir = xstrdup(remote_path);
 
 	if (file1 != NULL) {
 		dir = xstrdup(file1);
 		dir = sftp_make_absolute(dir, remote_path);
 
 		if (sftp_remote_is_dir(conn, dir) && file2 == NULL) {
 			if (!quiet)
 				mprintf("Changing to: %s\n", dir);
 			snprintf(cmd, sizeof cmd, "cd \"%s\"", dir);
 			if (parse_dispatch_command(conn, cmd,
 			    &remote_path, startdir, 1, 0) != 0) {
 				free(dir);
 				free(startdir);
 				free(remote_path);
 				free(conn);
 				return (-1);
 			}
 		} else {
 			/* XXX this is wrong wrt quoting */
 			snprintf(cmd, sizeof cmd, "get%s %s%s%s",
 			    global_aflag ? " -a" : "", dir,
 			    file2 == NULL ? "" : " ",
 			    file2 == NULL ? "" : file2);
 			err = parse_dispatch_command(conn, cmd,
 			    &remote_path, startdir, 1, 0);
 			free(dir);
 			free(startdir);
 			free(remote_path);
 			free(conn);
 			return (err);
 		}
 		free(dir);
 	}
 
 	setvbuf(stdout, NULL, _IOLBF, 0);
 	setvbuf(infile, NULL, _IOLBF, 0);
 
 	interactive = !batchmode && isatty(STDIN_FILENO);
 	err = 0;
 	for (;;) {
 		struct sigaction sa;
 
 		interrupted = 0;
 		memset(&sa, 0, sizeof(sa));
 		sa.sa_handler = interactive ? read_interrupt : killchild;
 		if (sigaction(SIGINT, &sa, NULL) == -1) {
 			debug3("sigaction(%s): %s", strsignal(SIGINT),
 			    strerror(errno));
 			break;
 		}
 		if (el == NULL) {
 			if (interactive)
 				printf("sftp> ");
 			if (fgets(cmd, sizeof(cmd), infile) == NULL) {
 				if (interactive)
 					printf("\n");
 				if (interrupted)
 					continue;
 				break;
 			}
 		} else {
 #ifdef USE_LIBEDIT
 			const char *line;
 			int count = 0;
 
 			if ((line = el_gets(el, &count)) == NULL ||
 			    count <= 0) {
 				printf("\n");
 				if (interrupted)
 					continue;
 				break;
 			}
 			history(hl, &hev, H_ENTER, line);
 			if (strlcpy(cmd, line, sizeof(cmd)) >= sizeof(cmd)) {
 				fprintf(stderr, "Error: input line too long\n");
 				continue;
 			}
 #endif /* USE_LIBEDIT */
 		}
 
 		cmd[strcspn(cmd, "\n")] = '\0';
 
 		/* Handle user interrupts gracefully during commands */
 		interrupted = 0;
 		ssh_signal(SIGINT, cmd_interrupt);
 
 		err = parse_dispatch_command(conn, cmd, &remote_path,
 		    startdir, batchmode, !interactive && el == NULL);
 		if (err != 0)
 			break;
 	}
 	ssh_signal(SIGCHLD, SIG_DFL);
 	free(remote_path);
 	free(startdir);
 	free(conn);
 
 #ifdef USE_LIBEDIT
 	if (el != NULL)
 		el_end(el);
 #endif /* USE_LIBEDIT */
 
 	/* err == 1 signifies normal "quit" exit */
 	return (err >= 0 ? 0 : -1);
 }
 
 static void
 connect_to_server(char *path, char **args, int *in, int *out)
 {
 	int c_in, c_out;
 #ifdef USE_PIPES
 	int pin[2], pout[2];
 
 	if ((pipe(pin) == -1) || (pipe(pout) == -1))
 		fatal("pipe: %s", strerror(errno));
 	*in = pin[0];
 	*out = pout[1];
 	c_in = pout[0];
 	c_out = pin[1];
 #else /* USE_PIPES */
 	int inout[2];
 
 	if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
 		fatal("socketpair: %s", strerror(errno));
 	*in = *out = inout[0];
 	c_in = c_out = inout[1];
 #endif /* USE_PIPES */
 
 	if ((sshpid = fork()) == -1)
 		fatal("fork: %s", strerror(errno));
 	else if (sshpid == 0) {
 		if ((dup2(c_in, STDIN_FILENO) == -1) ||
 		    (dup2(c_out, STDOUT_FILENO) == -1)) {
 			fprintf(stderr, "dup2: %s\n", strerror(errno));
 			_exit(1);
 		}
 		close(*in);
 		close(*out);
 		close(c_in);
 		close(c_out);
 
 		/*
 		 * The underlying ssh is in the same process group, so we must
 		 * ignore SIGINT if we want to gracefully abort commands,
 		 * otherwise the signal will make it to the ssh process and
 		 * kill it too.  Contrawise, since sftp sends SIGTERMs to the
 		 * underlying ssh, it must *not* ignore that signal.
 		 */
 		ssh_signal(SIGINT, SIG_IGN);
 		ssh_signal(SIGTERM, SIG_DFL);
 		execvp(path, args);
 		fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
 		_exit(1);
 	}
 
 	ssh_signal(SIGTERM, killchild);
 	ssh_signal(SIGINT, killchild);
 	ssh_signal(SIGHUP, killchild);
 	ssh_signal(SIGTSTP, suspchild);
 	ssh_signal(SIGTTIN, suspchild);
 	ssh_signal(SIGTTOU, suspchild);
 	ssh_signal(SIGCHLD, sigchld_handler);
 	close(c_in);
 	close(c_out);
 }
 
 static void
 usage(void)
 {
 	extern char *__progname;
 
 	fprintf(stderr,
 	    "usage: %s [-46AaCfNpqrv] [-B buffer_size] [-b batchfile] [-c cipher]\n"
 	    "          [-D sftp_server_command] [-F ssh_config] [-i identity_file]\n"
 	    "          [-J destination] [-l limit] [-o ssh_option] [-P port]\n"
 	    "          [-R num_requests] [-S program] [-s subsystem | sftp_server]\n"
 	    "          [-X sftp_option] destination\n",
 	    __progname);
 	exit(1);
 }
 
 int
 main(int argc, char **argv)
 {
 	int r, in, out, ch, err, tmp, port = -1, noisy = 0;
 	char *host = NULL, *user, *cp, **cpp, *file2 = NULL;
 	int debug_level = 0;
 	char *file1 = NULL, *sftp_server = NULL;
 	char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL;
 	const char *errstr;
 	LogLevel ll = SYSLOG_LEVEL_INFO;
 	arglist args;
 	extern int optind;
 	extern char *optarg;
 	struct sftp_conn *conn;
 	size_t copy_buffer_len = 0;
 	size_t num_requests = 0;
 	long long llv, limit_kbps = 0;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 	msetlocale();
 
 	__progname = ssh_get_progname(argv[0]);
 	memset(&args, '\0', sizeof(args));
 	args.list = NULL;
 	addargs(&args, "%s", ssh_program);
 	addargs(&args, "-oForwardX11 no");
 	addargs(&args, "-oPermitLocalCommand no");
 	addargs(&args, "-oClearAllForwardings yes");
 
 	ll = SYSLOG_LEVEL_INFO;
 	infile = stdin;
 
 	while ((ch = getopt(argc, argv,
 	    "1246AafhNpqrvCc:D:i:l:o:s:S:b:B:F:J:P:R:X:")) != -1) {
 		switch (ch) {
 		/* Passed through to ssh(1) */
 		case 'A':
 		case '4':
 		case '6':
 		case 'C':
 			addargs(&args, "-%c", ch);
 			break;
 		/* Passed through to ssh(1) with argument */
 		case 'F':
 		case 'J':
 		case 'c':
 		case 'i':
 		case 'o':
 			addargs(&args, "-%c", ch);
 			addargs(&args, "%s", optarg);
 			break;
 		case 'q':
 			ll = SYSLOG_LEVEL_ERROR;
 			quiet = 1;
 			showprogress = 0;
 			addargs(&args, "-%c", ch);
 			break;
 		case 'P':
 			port = a2port(optarg);
 			if (port <= 0)
 				fatal("Bad port \"%s\"\n", optarg);
 			break;
 		case 'v':
 			if (debug_level < 3) {
 				addargs(&args, "-v");
 				ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
 			}
 			debug_level++;
 			break;
 		case '1':
 			fatal("SSH protocol v.1 is no longer supported");
 			break;
 		case '2':
 			/* accept silently */
 			break;
 		case 'a':
 			global_aflag = 1;
 			break;
 		case 'B':
 			copy_buffer_len = strtol(optarg, &cp, 10);
 			if (copy_buffer_len == 0 || *cp != '\0')
 				fatal("Invalid buffer size \"%s\"", optarg);
 			break;
 		case 'b':
 			if (batchmode)
 				fatal("Batch file already specified.");
 
 			/* Allow "-" as stdin */
 			if (strcmp(optarg, "-") != 0 &&
 			    (infile = fopen(optarg, "r")) == NULL)
 				fatal("%s (%s).", strerror(errno), optarg);
 			showprogress = 0;
 			quiet = batchmode = 1;
 			addargs(&args, "-obatchmode yes");
 			break;
 		case 'f':
 			global_fflag = 1;
 			break;
 		case 'N':
 			noisy = 1; /* Used to clear quiet mode after getopt */
 			break;
 		case 'p':
 			global_pflag = 1;
 			break;
 		case 'D':
 			sftp_direct = optarg;
 			break;
 		case 'l':
 			limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
 			    &errstr);
 			if (errstr != NULL)
 				usage();
 			limit_kbps *= 1024; /* kbps */
 			break;
 		case 'r':
 			global_rflag = 1;
 			break;
 		case 'R':
 			num_requests = strtol(optarg, &cp, 10);
 			if (num_requests == 0 || *cp != '\0')
 				fatal("Invalid number of requests \"%s\"",
 				    optarg);
 			break;
 		case 's':
 			sftp_server = optarg;
 			break;
 		case 'S':
 			ssh_program = optarg;
 			replacearg(&args, 0, "%s", ssh_program);
 			break;
 		case 'X':
 			/* Please keep in sync with ssh.c -X */
 			if (strncmp(optarg, "buffer=", 7) == 0) {
 				r = scan_scaled(optarg + 7, &llv);
 				if (r == 0 && (llv <= 0 || llv > 256 * 1024)) {
 					r = -1;
 					errno = EINVAL;
 				}
 				if (r == -1) {
 					fatal("Invalid buffer size \"%s\": %s",
 					     optarg + 7, strerror(errno));
 				}
 				copy_buffer_len = (size_t)llv;
 			} else if (strncmp(optarg, "nrequests=", 10) == 0) {
 				llv = strtonum(optarg + 10, 1, 256 * 1024,
 				    &errstr);
 				if (errstr != NULL) {
 					fatal("Invalid number of requests "
 					    "\"%s\": %s", optarg + 10, errstr);
 				}
 				num_requests = (size_t)llv;
 			} else {
 				fatal("Invalid -X option");
 			}
 			break;
 		case 'h':
 		default:
 			usage();
 		}
 	}
 
 	/* Do this last because we want the user to be able to override it */
 	addargs(&args, "-oForwardAgent no");
 
 	if (!isatty(STDERR_FILENO))
 		showprogress = 0;
 
 	if (noisy)
 		quiet = 0;
 
 	log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
 
 	if (sftp_direct == NULL) {
 		if (optind == argc || argc > (optind + 2))
 			usage();
 		argv += optind;
 
 		switch (parse_uri("sftp", *argv, &user, &host, &tmp, &file1)) {
 		case -1:
 			usage();
 			break;
 		case 0:
 			if (tmp != -1)
 				port = tmp;
 			break;
 		default:
 			/* Try with user, host and path. */
 			if (parse_user_host_path(*argv, &user, &host,
 			    &file1) == 0)
 				break;
 			/* Try with user and host. */
 			if (parse_user_host_port(*argv, &user, &host, NULL)
 			    == 0)
 				break;
 			/* Treat as a plain hostname. */
 			host = xstrdup(*argv);
 			host = cleanhostname(host);
 			break;
 		}
 		file2 = *(argv + 1);
 
 		if (!*host) {
 			fprintf(stderr, "Missing hostname\n");
 			usage();
 		}
 
 		if (port != -1)
 			addargs(&args, "-oPort %d", port);
 		if (user != NULL) {
 			addargs(&args, "-l");
 			addargs(&args, "%s", user);
 		}
 
 		/* no subsystem if the server-spec contains a '/' */
 		if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
 			addargs(&args, "-s");
 
 		addargs(&args, "--");
 		addargs(&args, "%s", host);
 		addargs(&args, "%s", (sftp_server != NULL ?
 		    sftp_server : "sftp"));
 
 		connect_to_server(ssh_program, args.list, &in, &out);
 	} else {
 		if ((r = argv_split(sftp_direct, &tmp, &cpp, 1)) != 0)
 			fatal_r(r, "Parse -D arguments");
 		if (cpp[0] == 0)
 			fatal("No sftp server specified via -D");
 		connect_to_server(cpp[0], cpp, &in, &out);
 		argv_free(cpp, tmp);
 	}
 	freeargs(&args);
 
 	conn = sftp_init(in, out, copy_buffer_len, num_requests, limit_kbps);
 	if (conn == NULL)
 		fatal("Couldn't initialise connection to server");
 
 	if (!quiet) {
 		if (sftp_direct == NULL)
 			fprintf(stderr, "Connected to %s.\n", host);
 		else
 			fprintf(stderr, "Attached to %s.\n", sftp_direct);
 	}
 
 	err = interactive_loop(conn, file1, file2);
 
 #if !defined(USE_PIPES)
 	shutdown(in, SHUT_RDWR);
 	shutdown(out, SHUT_RDWR);
 #endif
 
 	close(in);
 	close(out);
 	if (batchmode)
 		fclose(infile);
 
 	while (waitpid(sshpid, NULL, 0) == -1 && sshpid > 1)
 		if (errno != EINTR)
 			fatal("Couldn't wait for ssh process: %s",
 			    strerror(errno));
 
 	exit(err == 0 ? 0 : 1);
 }
diff --git a/ssh-add.0 b/ssh-add.0
index fed996938d88..6ce88e040f92 100644
--- a/ssh-add.0
+++ b/ssh-add.0
@@ -1,210 +1,210 @@
 SSH-ADD(1)                  General Commands Manual                 SSH-ADD(1)
 
 NAME
      ssh-add M-bM-^@M-^S adds private key identities to the OpenSSH authentication agent
 
 SYNOPSIS
-     ssh-add [-cCDdKkLlqvXx] [-E fingerprint_hash] [-H hostkey_file]
+     ssh-add [-CcDdKkLlqvXx] [-E fingerprint_hash] [-H hostkey_file]
              [-h destination_constraint] [-S provider] [-t life] [file ...]
-     ssh-add -s pkcs11 [-vC] [certificate ...]
+     ssh-add -s pkcs11 [-Cv] [certificate ...]
      ssh-add -e pkcs11
      ssh-add -T pubkey ...
 
 DESCRIPTION
      ssh-add adds private key identities to the authentication agent,
      ssh-agent(1).  When run without arguments, it adds the files
      ~/.ssh/id_rsa, ~/.ssh/id_ecdsa, ~/.ssh/id_ecdsa_sk, ~/.ssh/id_ed25519,
      ~/.ssh/id_ed25519_sk, and ~/.ssh/id_dsa.  After loading a private key,
      ssh-add will try to load corresponding certificate information from the
      filename obtained by appending -cert.pub to the name of the private key
      file.  Alternative file names can be given on the command line.
 
      If any file requires a passphrase, ssh-add asks for the passphrase from
      the user.  The passphrase is read from the user's tty.  ssh-add retries
      the last passphrase if multiple identity files are given.
 
      The authentication agent must be running and the SSH_AUTH_SOCK
      environment variable must contain the name of its socket for ssh-add to
      work.
 
      The options are as follows:
 
+     -C      When loading keys into or deleting keys from the agent, process
+             certificates only and skip plain keys.
+
      -c      Indicates that added identities should be subject to confirmation
              before being used for authentication.  Confirmation is performed
              by ssh-askpass(1).  Successful confirmation is signaled by a zero
              exit status from ssh-askpass(1), rather than text entered into
              the requester.
 
-     -C      When loading keys into or deleting keys from the agent, process
-             certificates only and skip plain keys.
-
      -D      Deletes all identities from the agent.
 
      -d      Instead of adding identities, removes identities from the agent.
              If ssh-add has been run without arguments, the keys for the
              default identities and their corresponding certificates will be
              removed.  Otherwise, the argument list will be interpreted as a
              list of paths to public key files to specify keys and
              certificates to be removed from the agent.  If no public key is
              found at a given path, ssh-add will append .pub and retry.  If
              the argument list consists of M-bM-^@M-^\-M-bM-^@M-^] then ssh-add will read public
              keys to be removed from standard input.
 
      -E fingerprint_hash
              Specifies the hash algorithm used when displaying key
              fingerprints.  Valid options are: M-bM-^@M-^\md5M-bM-^@M-^] and M-bM-^@M-^\sha256M-bM-^@M-^].  The
              default is M-bM-^@M-^\sha256M-bM-^@M-^].
 
      -e pkcs11
              Remove keys provided by the PKCS#11 shared library pkcs11.
 
      -H hostkey_file
              Specifies a known hosts file to look up hostkeys when using
              destination-constrained keys via the -h flag.  This option may be
              specified multiple times to allow multiple files to be searched.
              If no files are specified, ssh-add will use the default
              ssh_config(5) known hosts files: ~/.ssh/known_hosts,
              ~/.ssh/known_hosts2, /etc/ssh/ssh_known_hosts, and
              /etc/ssh/ssh_known_hosts2.
 
      -h destination_constraint
              When adding keys, constrain them to be usable only through
              specific hosts or to specific destinations.
 
              Destination constraints of the form M-bM-^@M-^X[user@]dest-hostnameM-bM-^@M-^Y permit
              use of the key only from the origin host (the one running
              ssh-agent(1)) to the listed destination host, with optional user
              name.
 
              Constraints of the form M-bM-^@M-^Xsrc-hostname>[user@]dst-hostnameM-bM-^@M-^Y allow
              a key available on a forwarded ssh-agent(1) to be used through a
              particular host (as specified by M-bM-^@M-^Xsrc-hostnameM-bM-^@M-^Y) to authenticate
              to a further host, specified by M-bM-^@M-^Xdst-hostnameM-bM-^@M-^Y.
 
              Multiple destination constraints may be added when loading keys.
              When attempting authentication with a key that has destination
              constraints, the whole connection path, including ssh-agent(1)
              forwarding, is tested against those constraints and each hop must
              be permitted for the attempt to succeed.  For example, if key is
              forwarded to a remote host, M-bM-^@M-^Xhost-bM-bM-^@M-^Y, and is attempting
              authentication to another host, M-bM-^@M-^Xhost-cM-bM-^@M-^Y, then the operation will
              be successful only if M-bM-^@M-^Xhost-bM-bM-^@M-^Y was permitted from the origin host
              and the subsequent M-bM-^@M-^Xhost-b>host-cM-bM-^@M-^Y hop is also permitted by
              destination constraints.
 
              Hosts are identified by their host keys, and are looked up from
              known hosts files by ssh-add.  Wildcards patterns may be used for
              hostnames and certificate host keys are supported.  By default,
              keys added by ssh-add are not destination constrained.
 
              Destination constraints were added in OpenSSH release 8.9.
              Support in both the remote SSH client and server is required when
              using destination-constrained keys over a forwarded ssh-agent(1)
              channel.
 
              It is also important to note that destination constraints can
              only be enforced by ssh-agent(1) when a key is used, or when it
              is forwarded by a cooperating ssh(1).  Specifically, it does not
              prevent an attacker with access to a remote SSH_AUTH_SOCK from
              forwarding it again and using it on a different host (but only to
              a permitted destination).
 
      -K      Load resident keys from a FIDO authenticator.
 
      -k      When loading keys into or deleting keys from the agent, process
              plain private keys only and skip certificates.
 
      -L      Lists public key parameters of all identities currently
              represented by the agent.
 
      -l      Lists fingerprints of all identities currently represented by the
              agent.
 
      -q      Be quiet after a successful operation.
 
      -S provider
              Specifies a path to a library that will be used when adding FIDO
              authenticator-hosted keys, overriding the default of using the
              internal USB HID support.
 
      -s pkcs11
              Add keys provided by the PKCS#11 shared library pkcs11.
              Certificate files may optionally be listed as command-line
              arguments.  If these are present, then they will be loaded into
              the agent using any corresponding private keys loaded from the
              PKCS#11 token.
 
      -T pubkey ...
              Tests whether the private keys that correspond to the specified
              pubkey files are usable by performing sign and verify operations
              on each.
 
      -t life
              Set a maximum lifetime when adding identities to an agent.  The
              lifetime may be specified in seconds or in a time format
              specified in sshd_config(5).
 
      -v      Verbose mode.  Causes ssh-add to print debugging messages about
              its progress.  This is helpful in debugging problems.  Multiple
              -v options increase the verbosity.  The maximum is 3.
 
      -X      Unlock the agent.
 
      -x      Lock the agent with a password.
 
 ENVIRONMENT
      DISPLAY, SSH_ASKPASS and SSH_ASKPASS_REQUIRE
              If ssh-add needs a passphrase, it will read the passphrase from
              the current terminal if it was run from a terminal.  If ssh-add
              does not have a terminal associated with it but DISPLAY and
              SSH_ASKPASS are set, it will execute the program specified by
              SSH_ASKPASS (by default M-bM-^@M-^\ssh-askpassM-bM-^@M-^]) and open an X11 window to
              read the passphrase.  This is particularly useful when calling
              ssh-add from a .xsession or related script.
 
              SSH_ASKPASS_REQUIRE allows further control over the use of an
              askpass program.  If this variable is set to M-bM-^@M-^\neverM-bM-^@M-^] then ssh-add
              will never attempt to use one.  If it is set to M-bM-^@M-^\preferM-bM-^@M-^], then
              ssh-add will prefer to use the askpass program instead of the TTY
              when requesting passwords.  Finally, if the variable is set to
              M-bM-^@M-^\forceM-bM-^@M-^], then the askpass program will be used for all passphrase
              input regardless of whether DISPLAY is set.
 
      SSH_AUTH_SOCK
              Identifies the path of a UNIX-domain socket used to communicate
              with the agent.
 
      SSH_SK_PROVIDER
              Specifies a path to a library that will be used when loading any
              FIDO authenticator-hosted keys, overriding the default of using
              the built-in USB HID support.
 
 FILES
      ~/.ssh/id_dsa
      ~/.ssh/id_ecdsa
      ~/.ssh/id_ecdsa_sk
      ~/.ssh/id_ed25519
      ~/.ssh/id_ed25519_sk
      ~/.ssh/id_rsa
              Contains the DSA, ECDSA, authenticator-hosted ECDSA, Ed25519,
              authenticator-hosted Ed25519 or RSA authentication identity of
              the user.
 
      Identity files should not be readable by anyone but the user.  Note that
      ssh-add ignores identity files if they are accessible by others.
 
 EXIT STATUS
      Exit status is 0 on success, 1 if the specified command fails, and 2 if
      ssh-add is unable to contact the authentication agent.
 
 SEE ALSO
      ssh(1), ssh-agent(1), ssh-askpass(1), ssh-keygen(1), sshd(8)
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.
 
-OpenBSD 7.3                    December 18, 2023                   OpenBSD 7.3
+OpenBSD 7.5                    December 19, 2023                   OpenBSD 7.5
diff --git a/ssh-add.1 b/ssh-add.1
index f0186cd5fd71..290ba91d3d92 100644
--- a/ssh-add.1
+++ b/ssh-add.1
@@ -1,350 +1,350 @@
-.\"	$OpenBSD: ssh-add.1,v 1.85 2023/12/18 14:46:56 djm Exp $
+.\"	$OpenBSD: ssh-add.1,v 1.86 2023/12/19 06:57:34 jmc Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 .\"                    All rights reserved
 .\"
 .\" As far as I am concerned, the code I have written for this software
 .\" can be used freely for any purpose.  Any derived versions of this
 .\" software must be clearly marked as such, and if the derived work is
 .\" incompatible with the protocol description in the RFC file, it must be
 .\" called by a name other than "ssh" or "Secure Shell".
 .\"
 .\"
 .\" Copyright (c) 1999,2000 Markus Friedl.  All rights reserved.
 .\" Copyright (c) 1999 Aaron Campbell.  All rights reserved.
 .\" Copyright (c) 1999 Theo de Raadt.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: December 18 2023 $
+.Dd $Mdocdate: December 19 2023 $
 .Dt SSH-ADD 1
 .Os
 .Sh NAME
 .Nm ssh-add
 .Nd adds private key identities to the OpenSSH authentication agent
 .Sh SYNOPSIS
 .Nm ssh-add
-.Op Fl cCDdKkLlqvXx
+.Op Fl CcDdKkLlqvXx
 .Op Fl E Ar fingerprint_hash
 .Op Fl H Ar hostkey_file
 .Op Fl h Ar destination_constraint
 .Op Fl S Ar provider
 .Op Fl t Ar life
 .Op Ar
 .Nm ssh-add
 .Fl s Ar pkcs11
-.Op Fl vC
+.Op Fl Cv
 .Op Ar certificate ...
 .Nm ssh-add
 .Fl e Ar pkcs11
 .Nm ssh-add
 .Fl T
 .Ar pubkey ...
 .Sh DESCRIPTION
 .Nm
 adds private key identities to the authentication agent,
 .Xr ssh-agent 1 .
 When run without arguments, it adds the files
 .Pa ~/.ssh/id_rsa ,
 .Pa ~/.ssh/id_ecdsa ,
 .Pa ~/.ssh/id_ecdsa_sk ,
 .Pa ~/.ssh/id_ed25519 ,
 .Pa ~/.ssh/id_ed25519_sk ,
 and
 .Pa ~/.ssh/id_dsa .
 After loading a private key,
 .Nm
 will try to load corresponding certificate information from the
 filename obtained by appending
 .Pa -cert.pub
 to the name of the private key file.
 Alternative file names can be given on the command line.
 .Pp
 If any file requires a passphrase,
 .Nm
 asks for the passphrase from the user.
 The passphrase is read from the user's tty.
 .Nm
 retries the last passphrase if multiple identity files are given.
 .Pp
 The authentication agent must be running and the
 .Ev SSH_AUTH_SOCK
 environment variable must contain the name of its socket for
 .Nm
 to work.
 .Pp
 The options are as follows:
 .Bl -tag -width Ds
+.It Fl C
+When loading keys into or deleting keys from the agent, process
+certificates only and skip plain keys.
 .It Fl c
 Indicates that added identities should be subject to confirmation before
 being used for authentication.
 Confirmation is performed by
 .Xr ssh-askpass 1 .
 Successful confirmation is signaled by a zero exit status from
 .Xr ssh-askpass 1 ,
 rather than text entered into the requester.
-.It Fl C
-When loading keys into or deleting keys from the agent, process
-certificates only and skip plain keys.
 .It Fl D
 Deletes all identities from the agent.
 .It Fl d
 Instead of adding identities, removes identities from the agent.
 If
 .Nm
 has been run without arguments, the keys for the default identities and
 their corresponding certificates will be removed.
 Otherwise, the argument list will be interpreted as a list of paths to
 public key files to specify keys and certificates to be removed from the agent.
 If no public key is found at a given path,
 .Nm
 will append
 .Pa .pub
 and retry.
 If the argument list consists of
 .Dq -
 then
 .Nm
 will read public keys to be removed from standard input.
 .It Fl E Ar fingerprint_hash
 Specifies the hash algorithm used when displaying key fingerprints.
 Valid options are:
 .Dq md5
 and
 .Dq sha256 .
 The default is
 .Dq sha256 .
 .It Fl e Ar pkcs11
 Remove keys provided by the PKCS#11 shared library
 .Ar pkcs11 .
 .It Fl H Ar hostkey_file
 Specifies a known hosts file to look up hostkeys when using
 destination-constrained keys via the
 .Fl h
 flag.
 This option may be specified multiple times to allow multiple files to be
 searched.
 If no files are specified,
 .Nm
 will use the default
 .Xr ssh_config 5
 known hosts files:
 .Pa ~/.ssh/known_hosts ,
 .Pa ~/.ssh/known_hosts2 ,
 .Pa /etc/ssh/ssh_known_hosts ,
 and
 .Pa /etc/ssh/ssh_known_hosts2 .
 .It Fl h Ar destination_constraint
 When adding keys, constrain them to be usable only through specific hosts or to
 specific destinations.
 .Pp
 Destination constraints of the form
 .Sq [user@]dest-hostname
 permit use of the key only from the origin host (the one running
 .Xr ssh-agent 1 )
 to the listed destination host, with optional user name.
 .Pp
 Constraints of the form
 .Sq src-hostname>[user@]dst-hostname
 allow a key available on a forwarded
 .Xr ssh-agent 1
 to be used through a particular host (as specified by
 .Sq src-hostname )
 to authenticate to a further host,
 specified by
 .Sq dst-hostname .
 .Pp
 Multiple destination constraints may be added when loading keys.
 When attempting authentication with a key that has destination constraints,
 the whole connection path, including
 .Xr ssh-agent 1
 forwarding, is tested against those constraints and each
 hop must be permitted for the attempt to succeed.
 For example, if key is forwarded to a remote host,
 .Sq host-b ,
 and is attempting authentication to another host,
 .Sq host-c ,
 then the operation will be successful only if
 .Sq host-b
 was permitted from the origin host and the subsequent
 .Sq host-b>host-c
 hop is also permitted by destination constraints.
 .Pp
 Hosts are identified by their host keys, and are looked up from known hosts
 files by
 .Nm .
 Wildcards patterns may be used for hostnames and certificate host
 keys are supported.
 By default, keys added by
 .Nm
 are not destination constrained.
 .Pp
 Destination constraints were added in OpenSSH release 8.9.
 Support in both the remote SSH client and server is required when using
 destination-constrained keys over a forwarded
 .Xr ssh-agent 1
 channel.
 .Pp
 It is also important to note that destination constraints can only be
 enforced by
 .Xr ssh-agent 1
 when a key is used, or when it is forwarded by a
 .Sy cooperating
 .Xr ssh 1 .
 Specifically, it does not prevent an attacker with access to a remote
 .Ev SSH_AUTH_SOCK
 from forwarding it again and using it on a different host (but only to
 a permitted destination).
 .It Fl K
 Load resident keys from a FIDO authenticator.
 .It Fl k
 When loading keys into or deleting keys from the agent, process plain private
 keys only and skip certificates.
 .It Fl L
 Lists public key parameters of all identities currently represented
 by the agent.
 .It Fl l
 Lists fingerprints of all identities currently represented by the agent.
 .It Fl q
 Be quiet after a successful operation.
 .It Fl S Ar provider
 Specifies a path to a library that will be used when adding
 FIDO authenticator-hosted keys, overriding the default of using the
 internal USB HID support.
 .It Fl s Ar pkcs11
 Add keys provided by the PKCS#11 shared library
 .Ar pkcs11 .
 Certificate files may optionally be listed as command-line arguments.
 If these are present, then they will be loaded into the agent using any
 corresponding private keys loaded from the PKCS#11 token.
 .It Fl T Ar pubkey ...
 Tests whether the private keys that correspond to the specified
 .Ar pubkey
 files are usable by performing sign and verify operations on each.
 .It Fl t Ar life
 Set a maximum lifetime when adding identities to an agent.
 The lifetime may be specified in seconds or in a time format
 specified in
 .Xr sshd_config 5 .
 .It Fl v
 Verbose mode.
 Causes
 .Nm
 to print debugging messages about its progress.
 This is helpful in debugging problems.
 Multiple
 .Fl v
 options increase the verbosity.
 The maximum is 3.
 .It Fl X
 Unlock the agent.
 .It Fl x
 Lock the agent with a password.
 .El
 .Sh ENVIRONMENT
 .Bl -tag -width Ds
 .It Ev "DISPLAY", "SSH_ASKPASS" and "SSH_ASKPASS_REQUIRE"
 If
 .Nm
 needs a passphrase, it will read the passphrase from the current
 terminal if it was run from a terminal.
 If
 .Nm
 does not have a terminal associated with it but
 .Ev DISPLAY
 and
 .Ev SSH_ASKPASS
 are set, it will execute the program specified by
 .Ev SSH_ASKPASS
 (by default
 .Dq ssh-askpass )
 and open an X11 window to read the passphrase.
 This is particularly useful when calling
 .Nm
 from a
 .Pa .xsession
 or related script.
 .Pp
 .Ev SSH_ASKPASS_REQUIRE
 allows further control over the use of an askpass program.
 If this variable is set to
 .Dq never
 then
 .Nm
 will never attempt to use one.
 If it is set to
 .Dq prefer ,
 then
 .Nm
 will prefer to use the askpass program instead of the TTY when requesting
 passwords.
 Finally, if the variable is set to
 .Dq force ,
 then the askpass program will be used for all passphrase input regardless
 of whether
 .Ev DISPLAY
 is set.
 .It Ev SSH_AUTH_SOCK
 Identifies the path of a
 .Ux Ns -domain
 socket used to communicate with the agent.
 .It Ev SSH_SK_PROVIDER
 Specifies a path to a library that will be used when loading any
 FIDO authenticator-hosted keys, overriding the default of using
 the built-in USB HID support.
 .El
 .Sh FILES
 .Bl -tag -width Ds -compact
 .It Pa ~/.ssh/id_dsa
 .It Pa ~/.ssh/id_ecdsa
 .It Pa ~/.ssh/id_ecdsa_sk
 .It Pa ~/.ssh/id_ed25519
 .It Pa ~/.ssh/id_ed25519_sk
 .It Pa ~/.ssh/id_rsa
 Contains the DSA, ECDSA, authenticator-hosted ECDSA, Ed25519,
 authenticator-hosted Ed25519 or RSA authentication identity of the user.
 .El
 .Pp
 Identity files should not be readable by anyone but the user.
 Note that
 .Nm
 ignores identity files if they are accessible by others.
 .Sh EXIT STATUS
 Exit status is 0 on success, 1 if the specified command fails,
 and 2 if
 .Nm
 is unable to contact the authentication agent.
 .Sh SEE ALSO
 .Xr ssh 1 ,
 .Xr ssh-agent 1 ,
 .Xr ssh-askpass 1 ,
 .Xr ssh-keygen 1 ,
 .Xr sshd 8
 .Sh AUTHORS
 OpenSSH is a derivative of the original and free
 ssh 1.2.12 release by Tatu Ylonen.
 Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
 Theo de Raadt and Dug Song
 removed many bugs, re-added newer features and
 created OpenSSH.
 Markus Friedl contributed the support for SSH
 protocol versions 1.5 and 2.0.
diff --git a/ssh-add.c b/ssh-add.c
index 99ba23b525e5..e532d5ce1f64 100644
--- a/ssh-add.c
+++ b/ssh-add.c
@@ -1,1053 +1,1055 @@
-/* $OpenBSD: ssh-add.c,v 1.169 2023/12/18 14:46:56 djm Exp $ */
+/* $OpenBSD: ssh-add.c,v 1.172 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Adds an identity to the authentication server, or removes an identity.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * SSH2 implementation,
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 
 #ifdef WITH_OPENSSL
 # include <openssl/evp.h>
 # include "openbsd-compat/openssl-compat.h"
 #endif
 
 #include <errno.h>
 #include <fcntl.h>
 #include <pwd.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "log.h"
 #include "sshkey.h"
 #include "sshbuf.h"
 #include "authfd.h"
 #include "authfile.h"
 #include "pathnames.h"
 #include "misc.h"
 #include "ssherr.h"
 #include "digest.h"
 #include "ssh-sk.h"
 #include "sk-api.h"
 #include "hostfile.h"
 
 /* argv0 */
 extern char *__progname;
 
 /* Default files to add */
 static char *default_files[] = {
 #ifdef WITH_OPENSSL
 	_PATH_SSH_CLIENT_ID_RSA,
 #ifdef OPENSSL_HAS_ECC
 	_PATH_SSH_CLIENT_ID_ECDSA,
 	_PATH_SSH_CLIENT_ID_ECDSA_SK,
 #endif
 #endif /* WITH_OPENSSL */
 	_PATH_SSH_CLIENT_ID_ED25519,
 	_PATH_SSH_CLIENT_ID_ED25519_SK,
 	_PATH_SSH_CLIENT_ID_XMSS,
+#ifdef WITH_DSA
 	_PATH_SSH_CLIENT_ID_DSA,
+#endif
 	NULL
 };
 
 static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
 
 /* Default lifetime (0 == forever) */
 static int lifetime = 0;
 
 /* User has to confirm key use */
 static int confirm = 0;
 
 /* Maximum number of signatures (XMSS) */
 static u_int maxsign = 0;
 static u_int minleft = 0;
 
 /* we keep a cache of one passphrase */
 static char *pass = NULL;
 static void
 clear_pass(void)
 {
 	if (pass) {
 		freezero(pass, strlen(pass));
 		pass = NULL;
 	}
 }
 
 static int
 delete_one(int agent_fd, const struct sshkey *key, const char *comment,
     const char *path, int qflag)
 {
 	int r;
 
 	if ((r = ssh_remove_identity(agent_fd, key)) != 0) {
 		fprintf(stderr, "Could not remove identity \"%s\": %s\n",
 		    path, ssh_err(r));
 		return r;
 	}
 	if (!qflag) {
 		fprintf(stderr, "Identity removed: %s %s (%s)\n", path,
 		    sshkey_type(key), comment ? comment : "no comment");
 	}
 	return 0;
 }
 
 static int
 delete_stdin(int agent_fd, int qflag, int key_only, int cert_only)
 {
 	char *line = NULL, *cp;
 	size_t linesize = 0;
 	struct sshkey *key = NULL;
 	int lnum = 0, r, ret = -1;
 
 	while (getline(&line, &linesize, stdin) != -1) {
 		lnum++;
 		sshkey_free(key);
 		key = NULL;
 		line[strcspn(line, "\n")] = '\0';
 		cp = line + strspn(line, " \t");
 		if (*cp == '#' || *cp == '\0')
 			continue;
 		if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal_f("sshkey_new");
 		if ((r = sshkey_read(key, &cp)) != 0) {
 			error_r(r, "(stdin):%d: invalid key", lnum);
 			continue;
 		}
 		if ((!key_only && !cert_only) ||
 		    (key_only && !sshkey_is_cert(key)) ||
 		    (cert_only && sshkey_is_cert(key))) {
 			if (delete_one(agent_fd, key, cp,
 			    "(stdin)", qflag) == 0)
 				ret = 0;
 		}
 	}
 	sshkey_free(key);
 	free(line);
 	return ret;
 }
 
 static int
 delete_file(int agent_fd, const char *filename, int key_only,
     int cert_only, int qflag)
 {
 	struct sshkey *public, *cert = NULL;
 	char *certpath = NULL, *comment = NULL;
 	int r, ret = -1;
 
 	if (strcmp(filename, "-") == 0)
 		return delete_stdin(agent_fd, qflag, key_only, cert_only);
 
 	if ((r = sshkey_load_public(filename, &public,  &comment)) != 0) {
 		printf("Bad key file %s: %s\n", filename, ssh_err(r));
 		return -1;
 	}
 	if ((!key_only && !cert_only) ||
 	    (key_only && !sshkey_is_cert(public)) ||
 	    (cert_only && sshkey_is_cert(public))) {
 		if (delete_one(agent_fd, public, comment, filename, qflag) == 0)
 			ret = 0;
 	}
 
 	if (key_only)
 		goto out;
 
 	/* Now try to delete the corresponding certificate too */
 	free(comment);
 	comment = NULL;
 	xasprintf(&certpath, "%s-cert.pub", filename);
 	if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) {
 		if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
 			error_r(r, "Failed to load certificate \"%s\"", certpath);
 		goto out;
 	}
 
 	if (!sshkey_equal_public(cert, public))
 		fatal("Certificate %s does not match private key %s",
 		    certpath, filename);
 
 	if (delete_one(agent_fd, cert, comment, certpath, qflag) == 0)
 		ret = 0;
 
  out:
 	sshkey_free(cert);
 	sshkey_free(public);
 	free(certpath);
 	free(comment);
 
 	return ret;
 }
 
 /* Send a request to remove all identities. */
 static int
 delete_all(int agent_fd, int qflag)
 {
 	int ret = -1;
 
 	/*
 	 * Since the agent might be forwarded, old or non-OpenSSH, when asked
 	 * to remove all keys, attempt to remove both protocol v.1 and v.2
 	 * keys.
 	 */
 	if (ssh_remove_all_identities(agent_fd, 2) == 0)
 		ret = 0;
 	/* ignore error-code for ssh1 */
 	ssh_remove_all_identities(agent_fd, 1);
 
 	if (ret != 0)
 		fprintf(stderr, "Failed to remove all identities.\n");
 	else if (!qflag)
 		fprintf(stderr, "All identities removed.\n");
 
 	return ret;
 }
 
 static int
 add_file(int agent_fd, const char *filename, int key_only, int cert_only,
     int qflag, const char *skprovider,
     struct dest_constraint **dest_constraints,
     size_t ndest_constraints)
 {
 	struct sshkey *private, *cert;
 	char *comment = NULL;
 	char msg[1024], *certpath = NULL;
 	int r, fd, ret = -1;
 	size_t i;
 	u_int32_t left;
 	struct sshbuf *keyblob;
 	struct ssh_identitylist *idlist;
 
 	if (strcmp(filename, "-") == 0) {
 		fd = STDIN_FILENO;
 		filename = "(stdin)";
 	} else if ((fd = open(filename, O_RDONLY)) == -1) {
 		perror(filename);
 		return -1;
 	}
 
 	/*
 	 * Since we'll try to load a keyfile multiple times, permission errors
 	 * will occur multiple times, so check perms first and bail if wrong.
 	 */
 	if (fd != STDIN_FILENO) {
 		if (sshkey_perm_ok(fd, filename) != 0) {
 			close(fd);
 			return -1;
 		}
 	}
 	if ((r = sshbuf_load_fd(fd, &keyblob)) != 0) {
 		fprintf(stderr, "Error loading key \"%s\": %s\n",
 		    filename, ssh_err(r));
 		sshbuf_free(keyblob);
 		close(fd);
 		return -1;
 	}
 	close(fd);
 
 	/* At first, try empty passphrase */
 	if ((r = sshkey_parse_private_fileblob(keyblob, "", &private,
 	    &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
 		fprintf(stderr, "Error loading key \"%s\": %s\n",
 		    filename, ssh_err(r));
 		goto fail_load;
 	}
 	/* try last */
 	if (private == NULL && pass != NULL) {
 		if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private,
 		    &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
 			fprintf(stderr, "Error loading key \"%s\": %s\n",
 			    filename, ssh_err(r));
 			goto fail_load;
 		}
 	}
 	if (private == NULL) {
 		/* clear passphrase since it did not work */
 		clear_pass();
 		snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ",
 		    filename, confirm ? " (will confirm each use)" : "");
 		for (;;) {
 			pass = read_passphrase(msg, RP_ALLOW_STDIN);
 			if (strcmp(pass, "") == 0)
 				goto fail_load;
 			if ((r = sshkey_parse_private_fileblob(keyblob, pass,
 			    &private, &comment)) == 0)
 				break;
 			else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
 				fprintf(stderr,
 				    "Error loading key \"%s\": %s\n",
 				    filename, ssh_err(r));
  fail_load:
 				clear_pass();
 				sshbuf_free(keyblob);
 				return -1;
 			}
 			clear_pass();
 			snprintf(msg, sizeof msg,
 			    "Bad passphrase, try again for %s%s: ", filename,
 			    confirm ? " (will confirm each use)" : "");
 		}
 	}
 	if (comment == NULL || *comment == '\0')
 		comment = xstrdup(filename);
 	sshbuf_free(keyblob);
 
 	/* For XMSS */
 	if ((r = sshkey_set_filename(private, filename)) != 0) {
 		fprintf(stderr, "Could not add filename to private key: %s (%s)\n",
 		    filename, comment);
 		goto out;
 	}
 	if (maxsign && minleft &&
 	    (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) {
 		for (i = 0; i < idlist->nkeys; i++) {
 			if (!sshkey_equal_public(idlist->keys[i], private))
 				continue;
 			left = sshkey_signatures_left(idlist->keys[i]);
 			if (left < minleft) {
 				fprintf(stderr,
 				    "Only %d signatures left.\n", left);
 				break;
 			}
 			fprintf(stderr, "Skipping update: ");
 			if (left == minleft) {
 				fprintf(stderr,
 				    "required signatures left (%d).\n", left);
 			} else {
 				fprintf(stderr,
 				    "more signatures left (%d) than"
 				    " required (%d).\n", left, minleft);
 			}
 			ssh_free_identitylist(idlist);
 			goto out;
 		}
 		ssh_free_identitylist(idlist);
 	}
 
 	if (sshkey_is_sk(private)) {
 		if (skprovider == NULL) {
 			fprintf(stderr, "Cannot load FIDO key %s "
 			    "without provider\n", filename);
 			goto out;
 		}
 	} else {
 		/* Don't send provider constraint for other keys */
 		skprovider = NULL;
 	}
 
 	if (!cert_only &&
 	    (r = ssh_add_identity_constrained(agent_fd, private, comment,
 	    lifetime, confirm, maxsign, skprovider,
 	    dest_constraints, ndest_constraints)) == 0) {
 		ret = 0;
 		if (!qflag) {
 			fprintf(stderr, "Identity added: %s (%s)\n",
 			    filename, comment);
 			if (lifetime != 0) {
 				fprintf(stderr,
 				    "Lifetime set to %d seconds\n", lifetime);
 			}
 			if (confirm != 0) {
 				fprintf(stderr, "The user must confirm "
 				    "each use of the key\n");
 			}
 		}
 	} else {
 		fprintf(stderr, "Could not add identity \"%s\": %s\n",
 		    filename, ssh_err(r));
 	}
 
 	/* Skip trying to load the cert if requested */
 	if (key_only)
 		goto out;
 
 	/* Now try to add the certificate flavour too */
 	xasprintf(&certpath, "%s-cert.pub", filename);
 	if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) {
 		if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
 			error_r(r, "Failed to load certificate \"%s\"",
 			    certpath);
 		goto out;
 	}
 
 	if (!sshkey_equal_public(cert, private)) {
 		error("Certificate %s does not match private key %s",
 		    certpath, filename);
 		sshkey_free(cert);
 		goto out;
 	}
 
 	/* Graft with private bits */
 	if ((r = sshkey_to_certified(private)) != 0) {
 		error_fr(r, "sshkey_to_certified");
 		sshkey_free(cert);
 		goto out;
 	}
 	if ((r = sshkey_cert_copy(cert, private)) != 0) {
 		error_fr(r, "sshkey_cert_copy");
 		sshkey_free(cert);
 		goto out;
 	}
 	sshkey_free(cert);
 
 	if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
 	    lifetime, confirm, maxsign, skprovider,
 	    dest_constraints, ndest_constraints)) != 0) {
 		error_r(r, "Certificate %s (%s) add failed", certpath,
 		    private->cert->key_id);
 		goto out;
 	}
 	/* success */
 	if (!qflag) {
 		fprintf(stderr, "Certificate added: %s (%s)\n", certpath,
 		    private->cert->key_id);
 		if (lifetime != 0) {
 			fprintf(stderr, "Lifetime set to %d seconds\n",
 			    lifetime);
 		}
 		if (confirm != 0) {
 			fprintf(stderr, "The user must confirm each use "
 			    "of the key\n");
 		}
 	}
 
  out:
 	free(certpath);
 	free(comment);
 	sshkey_free(private);
 
 	return ret;
 }
 
 static int
 update_card(int agent_fd, int add, const char *id, int qflag,
     int key_only, int cert_only,
     struct dest_constraint **dest_constraints, size_t ndest_constraints,
     struct sshkey **certs, size_t ncerts)
 {
 	char *pin = NULL;
 	int r, ret = -1;
 
 	if (key_only)
 		ncerts = 0;
 
 	if (add) {
 		if ((pin = read_passphrase("Enter passphrase for PKCS#11: ",
 		    RP_ALLOW_STDIN)) == NULL)
 			return -1;
 	}
 
 	if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin,
 	    lifetime, confirm, dest_constraints, ndest_constraints,
 	    cert_only, certs, ncerts)) == 0) {
 		ret = 0;
 		if (!qflag) {
 			fprintf(stderr, "Card %s: %s\n",
 			    add ? "added" : "removed", id);
 		}
 	} else {
 		fprintf(stderr, "Could not %s card \"%s\": %s\n",
 		    add ? "add" : "remove", id, ssh_err(r));
 		ret = -1;
 	}
 	free(pin);
 	return ret;
 }
 
 static int
 test_key(int agent_fd, const char *filename)
 {
 	struct sshkey *key = NULL;
 	u_char *sig = NULL;
 	const char *alg = NULL;
 	size_t slen = 0;
 	int r, ret = -1;
 	char data[1024];
 
 	if ((r = sshkey_load_public(filename, &key, NULL)) != 0) {
 		error_r(r, "Couldn't read public key %s", filename);
 		return -1;
 	}
 	if (sshkey_type_plain(key->type) == KEY_RSA)
 		alg = "rsa-sha2-256";
 	arc4random_buf(data, sizeof(data));
 	if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data),
 	    alg, 0)) != 0) {
 		error_r(r, "Agent signature failed for %s", filename);
 		goto done;
 	}
 	if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
 	    alg, 0, NULL)) != 0) {
 		error_r(r, "Signature verification failed for %s", filename);
 		goto done;
 	}
 	/* success */
 	ret = 0;
  done:
 	free(sig);
 	sshkey_free(key);
 	return ret;
 }
 
 static int
 list_identities(int agent_fd, int do_fp)
 {
 	char *fp;
 	int r;
 	struct ssh_identitylist *idlist;
 	u_int32_t left;
 	size_t i;
 
 	if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
 		if (r != SSH_ERR_AGENT_NO_IDENTITIES)
 			fprintf(stderr, "error fetching identities: %s\n",
 			    ssh_err(r));
 		else
 			printf("The agent has no identities.\n");
 		return -1;
 	}
 	for (i = 0; i < idlist->nkeys; i++) {
 		if (do_fp) {
 			fp = sshkey_fingerprint(idlist->keys[i],
 			    fingerprint_hash, SSH_FP_DEFAULT);
 			printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]),
 			    fp == NULL ? "(null)" : fp, idlist->comments[i],
 			    sshkey_type(idlist->keys[i]));
 			free(fp);
 		} else {
 			if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) {
 				fprintf(stderr, "sshkey_write: %s\n",
 				    ssh_err(r));
 				continue;
 			}
 			fprintf(stdout, " %s", idlist->comments[i]);
 			left = sshkey_signatures_left(idlist->keys[i]);
 			if (left > 0)
 				fprintf(stdout,
 				    " [signatures left %d]", left);
 			fprintf(stdout, "\n");
 		}
 	}
 	ssh_free_identitylist(idlist);
 	return 0;
 }
 
 static int
 lock_agent(int agent_fd, int lock)
 {
 	char prompt[100], *p1, *p2;
 	int r, passok = 1, ret = -1;
 
 	strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
 	p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
 	if (lock) {
 		strlcpy(prompt, "Again: ", sizeof prompt);
 		p2 = read_passphrase(prompt, RP_ALLOW_STDIN);
 		if (strcmp(p1, p2) != 0) {
 			fprintf(stderr, "Passwords do not match.\n");
 			passok = 0;
 		}
 		freezero(p2, strlen(p2));
 	}
 	if (passok) {
 		if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) {
 			fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
 			ret = 0;
 		} else {
 			fprintf(stderr, "Failed to %slock agent: %s\n",
 			    lock ? "" : "un", ssh_err(r));
 		}
 	}
 	freezero(p1, strlen(p1));
 	return (ret);
 }
 
 static int
 load_resident_keys(int agent_fd, const char *skprovider, int qflag,
     struct dest_constraint **dest_constraints, size_t ndest_constraints)
 {
 	struct sshsk_resident_key **srks;
 	size_t nsrks, i;
 	struct sshkey *key;
 	int r, ok = 0;
 	char *fp;
 
 	pass = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
 	if ((r = sshsk_load_resident(skprovider, NULL, pass, 0,
 	    &srks, &nsrks)) != 0) {
 		error_r(r, "Unable to load resident keys");
 		return r;
 	}
 	for (i = 0; i < nsrks; i++) {
 		key = srks[i]->key;
 		if ((fp = sshkey_fingerprint(key,
 		    fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("sshkey_fingerprint failed");
 		if ((r = ssh_add_identity_constrained(agent_fd, key, "",
 		    lifetime, confirm, maxsign, skprovider,
 		    dest_constraints, ndest_constraints)) != 0) {
 			error("Unable to add key %s %s",
 			    sshkey_type(key), fp);
 			free(fp);
 			ok = r;
 			continue;
 		}
 		if (ok == 0)
 			ok = 1;
 		if (!qflag) {
 			fprintf(stderr, "Resident identity added: %s %s\n",
 			    sshkey_type(key), fp);
 			if (lifetime != 0) {
 				fprintf(stderr,
 				    "Lifetime set to %d seconds\n", lifetime);
 			}
 			if (confirm != 0) {
 				fprintf(stderr, "The user must confirm "
 				    "each use of the key\n");
 			}
 		}
 		free(fp);
 	}
 	sshsk_free_resident_keys(srks, nsrks);
 	if (nsrks == 0)
 		return SSH_ERR_KEY_NOT_FOUND;
 	return ok == 1 ? 0 : ok;
 }
 
 static int
 do_file(int agent_fd, int deleting, int key_only, int cert_only,
     char *file, int qflag, const char *skprovider,
     struct dest_constraint **dest_constraints, size_t ndest_constraints)
 {
 	if (deleting) {
 		if (delete_file(agent_fd, file, key_only,
 		    cert_only, qflag) == -1)
 			return -1;
 	} else {
 		if (add_file(agent_fd, file, key_only, cert_only, qflag,
 		    skprovider, dest_constraints, ndest_constraints) == -1)
 			return -1;
 	}
 	return 0;
 }
 
 /* Append string 's' to a NULL-terminated array of strings */
 static void
 stringlist_append(char ***listp, const char *s)
 {
 	size_t i = 0;
 
 	if (*listp == NULL)
 		*listp = xcalloc(2, sizeof(**listp));
 	else {
 		for (i = 0; (*listp)[i] != NULL; i++)
 			; /* count */
 		*listp = xrecallocarray(*listp, i + 1, i + 2, sizeof(**listp));
 	}
 	(*listp)[i] = xstrdup(s);
 }
 
 static void
 parse_dest_constraint_hop(const char *s, struct dest_constraint_hop *dch,
     char **hostkey_files)
 {
 	char *user = NULL, *host, *os, *path;
 	size_t i;
 	struct hostkeys *hostkeys;
 	const struct hostkey_entry *hke;
 	int r, want_ca;
 
 	memset(dch, '\0', sizeof(*dch));
 	os = xstrdup(s);
 	if ((host = strchr(os, '@')) == NULL)
 		host = os;
 	else {
 		*host++ = '\0';
 		user = os;
 	}
 	cleanhostname(host);
 	/* Trivial case: username@ (all hosts) */
 	if (*host == '\0') {
 		if (user == NULL) {
 			fatal("Invalid key destination constraint \"%s\": "
 			    "does not specify user or host", s);
 		}
 		dch->user = xstrdup(user);
 		/* other fields left blank */
 		free(os);
 		return;
 	}
 	if (hostkey_files == NULL)
 		fatal_f("no hostkey files");
 	/* Otherwise we need to look up the keys for this hostname */
 	hostkeys = init_hostkeys();
 	for (i = 0; hostkey_files[i]; i++) {
 		path = tilde_expand_filename(hostkey_files[i], getuid());
 		debug2_f("looking up host keys for \"%s\" in %s", host, path);
                 load_hostkeys(hostkeys, host, path, 0);
 		free(path);
 	}
 	dch->user = user == NULL ? NULL : xstrdup(user);
 	dch->hostname = xstrdup(host);
 	for (i = 0; i < hostkeys->num_entries; i++) {
 		hke = hostkeys->entries + i;
 		want_ca = hke->marker == MRK_CA;
 		if (hke->marker != MRK_NONE && !want_ca)
 			continue;
 		debug3_f("%s%s%s: adding %s %skey from %s:%lu as key %u",
 		    user == NULL ? "": user, user == NULL ? "" : "@",
 		    host, sshkey_type(hke->key), want_ca ? "CA " : "",
 		    hke->file, hke->line, dch->nkeys);
 		dch->keys = xrecallocarray(dch->keys, dch->nkeys,
 		    dch->nkeys + 1, sizeof(*dch->keys));
 		dch->key_is_ca = xrecallocarray(dch->key_is_ca, dch->nkeys,
 		    dch->nkeys + 1, sizeof(*dch->key_is_ca));
 		if ((r = sshkey_from_private(hke->key,
 		    &(dch->keys[dch->nkeys]))) != 0)
 			fatal_fr(r, "sshkey_from_private");
 		dch->key_is_ca[dch->nkeys] = want_ca;
 		dch->nkeys++;
 	}
 	if (dch->nkeys == 0)
 		fatal("No host keys found for destination \"%s\"", host);
 	free_hostkeys(hostkeys);
 	free(os);
 	return;
 }
 
 static void
 parse_dest_constraint(const char *s, struct dest_constraint ***dcp,
     size_t *ndcp, char **hostkey_files)
 {
 	struct dest_constraint *dc;
 	char *os, *cp;
 
 	dc = xcalloc(1, sizeof(*dc));
 	os = xstrdup(s);
 	if ((cp = strchr(os, '>')) == NULL) {
 		/* initial hop; no 'from' hop specified */
 		parse_dest_constraint_hop(os, &dc->to, hostkey_files);
 	} else {
 		/* two hops specified */
 		*(cp++) = '\0';
 		parse_dest_constraint_hop(os, &dc->from, hostkey_files);
 		parse_dest_constraint_hop(cp, &dc->to, hostkey_files);
 		if (dc->from.user != NULL) {
 			fatal("Invalid key constraint %s: cannot specify "
 			    "user on 'from' host", os);
 		}
 	}
 	/* XXX eliminate or error on duplicates */
 	debug2_f("constraint %zu: %s%s%s (%u keys) > %s%s%s (%u keys)", *ndcp,
 	    dc->from.user ? dc->from.user : "", dc->from.user ? "@" : "",
 	    dc->from.hostname ? dc->from.hostname : "(ORIGIN)", dc->from.nkeys,
 	    dc->to.user ? dc->to.user : "", dc->to.user ? "@" : "",
 	    dc->to.hostname ? dc->to.hostname : "(ANY)", dc->to.nkeys);
 	*dcp = xrecallocarray(*dcp, *ndcp, *ndcp + 1, sizeof(**dcp));
 	(*dcp)[(*ndcp)++] = dc;
 	free(os);
 }
 
 
 static void
 usage(void)
 {
 	fprintf(stderr,
-"usage: ssh-add [-cDdKkLlqvXx] [-E fingerprint_hash] [-H hostkey_file]\n"
+"usage: ssh-add [-CcDdKkLlqvXx] [-E fingerprint_hash] [-H hostkey_file]\n"
 "               [-h destination_constraint] [-S provider] [-t life]\n"
 #ifdef WITH_XMSS
 "               [-M maxsign] [-m minleft]\n"
 #endif
 "               [file ...]\n"
-"       ssh-add -s pkcs11\n"
+"       ssh-add -s pkcs11 [-Cv] [certificate ...]\n"
 "       ssh-add -e pkcs11\n"
 "       ssh-add -T pubkey ...\n"
 	);
 }
 
 int
 main(int argc, char **argv)
 {
 	extern char *optarg;
 	extern int optind;
 	int agent_fd;
 	char *pkcs11provider = NULL, *skprovider = NULL;
 	char **dest_constraint_strings = NULL, **hostkey_files = NULL;
 	int r, i, ch, deleting = 0, ret = 0, key_only = 0, cert_only = 0;
 	int do_download = 0, xflag = 0, lflag = 0, Dflag = 0;
 	int qflag = 0, Tflag = 0;
 	SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
 	LogLevel log_level = SYSLOG_LEVEL_INFO;
 	struct sshkey *k, **certs = NULL;
 	struct dest_constraint **dest_constraints = NULL;
-	size_t ndest_constraints = 0i, ncerts = 0;
+	size_t ndest_constraints = 0, ncerts = 0;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	__progname = ssh_get_progname(argv[0]);
 	seed_rng();
 
 	log_init(__progname, log_level, log_facility, 1);
 
 	setvbuf(stdout, NULL, _IOLBF, 0);
 
 	/* First, get a connection to the authentication agent. */
 	switch (r = ssh_get_authentication_socket(&agent_fd)) {
 	case 0:
 		break;
 	case SSH_ERR_AGENT_NOT_PRESENT:
 		fprintf(stderr, "Could not open a connection to your "
 		    "authentication agent.\n");
 		exit(2);
 	default:
 		fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r));
 		exit(2);
 	}
 
 	skprovider = getenv("SSH_SK_PROVIDER");
 
 	while ((ch = getopt(argc, argv, "vkKlLCcdDTxXE:e:h:H:M:m:qs:S:t:")) != -1) {
 		switch (ch) {
 		case 'v':
 			if (log_level == SYSLOG_LEVEL_INFO)
 				log_level = SYSLOG_LEVEL_DEBUG1;
 			else if (log_level < SYSLOG_LEVEL_DEBUG3)
 				log_level++;
 			break;
 		case 'E':
 			fingerprint_hash = ssh_digest_alg_by_name(optarg);
 			if (fingerprint_hash == -1)
 				fatal("Invalid hash algorithm \"%s\"", optarg);
 			break;
 		case 'H':
 			stringlist_append(&hostkey_files, optarg);
 			break;
 		case 'h':
 			stringlist_append(&dest_constraint_strings, optarg);
 			break;
 		case 'k':
 			key_only = 1;
 			break;
 		case 'C':
 			cert_only = 1;
 			break;
 		case 'K':
 			do_download = 1;
 			break;
 		case 'l':
 		case 'L':
 			if (lflag != 0)
 				fatal("-%c flag already specified", lflag);
 			lflag = ch;
 			break;
 		case 'x':
 		case 'X':
 			if (xflag != 0)
 				fatal("-%c flag already specified", xflag);
 			xflag = ch;
 			break;
 		case 'c':
 			confirm = 1;
 			break;
 		case 'm':
 			minleft = (u_int)strtonum(optarg, 1, UINT_MAX, NULL);
 			if (minleft == 0) {
 				usage();
 				ret = 1;
 				goto done;
 			}
 			break;
 		case 'M':
 			maxsign = (u_int)strtonum(optarg, 1, UINT_MAX, NULL);
 			if (maxsign == 0) {
 				usage();
 				ret = 1;
 				goto done;
 			}
 			break;
 		case 'd':
 			deleting = 1;
 			break;
 		case 'D':
 			Dflag = 1;
 			break;
 		case 's':
 			pkcs11provider = optarg;
 			break;
 		case 'S':
 			skprovider = optarg;
 			break;
 		case 'e':
 			deleting = 1;
 			pkcs11provider = optarg;
 			break;
 		case 't':
 			if ((lifetime = convtime(optarg)) == -1 ||
 			    lifetime < 0 || (u_long)lifetime > UINT32_MAX) {
 				fprintf(stderr, "Invalid lifetime\n");
 				ret = 1;
 				goto done;
 			}
 			break;
 		case 'q':
 			qflag = 1;
 			break;
 		case 'T':
 			Tflag = 1;
 			break;
 		default:
 			usage();
 			ret = 1;
 			goto done;
 		}
 	}
 	log_init(__progname, log_level, log_facility, 1);
 
 	if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1)
 		fatal("Invalid combination of actions");
 	else if (xflag) {
 		if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1)
 			ret = 1;
 		goto done;
 	} else if (lflag) {
 		if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1)
 			ret = 1;
 		goto done;
 	} else if (Dflag) {
 		if (delete_all(agent_fd, qflag) == -1)
 			ret = 1;
 		goto done;
 	}
 
 #ifdef ENABLE_SK_INTERNAL
 	if (skprovider == NULL)
 		skprovider = "internal";
 #endif
 
 	if (hostkey_files == NULL) {
 		/* use defaults from readconf.c */
 		stringlist_append(&hostkey_files, _PATH_SSH_USER_HOSTFILE);
 		stringlist_append(&hostkey_files, _PATH_SSH_USER_HOSTFILE2);
 		stringlist_append(&hostkey_files, _PATH_SSH_SYSTEM_HOSTFILE);
 		stringlist_append(&hostkey_files, _PATH_SSH_SYSTEM_HOSTFILE2);
 	}
 	if (dest_constraint_strings != NULL) {
 		for (i = 0; dest_constraint_strings[i] != NULL; i++) {
 			parse_dest_constraint(dest_constraint_strings[i],
 			  &dest_constraints, &ndest_constraints, hostkey_files);
 		}
 	}
 
 	argc -= optind;
 	argv += optind;
 	if (Tflag) {
 		if (argc <= 0)
 			fatal("no keys to test");
 		for (r = i = 0; i < argc; i++)
 			r |= test_key(agent_fd, argv[i]);
 		ret = r == 0 ? 0 : 1;
 		goto done;
 	}
 	if (pkcs11provider != NULL) {
 		for (i = 0; i < argc; i++) {
 			if ((r = sshkey_load_public(argv[i], &k, NULL)) != 0)
 				fatal_fr(r, "load certificate %s", argv[i]);
 			certs = xrecallocarray(certs, ncerts, ncerts + 1,
 			    sizeof(*certs));
 			debug2("%s: %s", argv[i], sshkey_ssh_name(k));
 			certs[ncerts++] = k;
 		}
 		debug2_f("loaded %zu certificates", ncerts);
 		if (update_card(agent_fd, !deleting, pkcs11provider,
 		    qflag, key_only, cert_only,
 		    dest_constraints, ndest_constraints,
 		    certs, ncerts) == -1)
 			ret = 1;
 		goto done;
 	}
 	if (do_download) {
 		if (skprovider == NULL)
 			fatal("Cannot download keys without provider");
 		if (load_resident_keys(agent_fd, skprovider, qflag,
 		    dest_constraints, ndest_constraints) != 0)
 			ret = 1;
 		goto done;
 	}
 	if (argc == 0) {
 		char buf[PATH_MAX];
 		struct passwd *pw;
 		struct stat st;
 		int count = 0;
 
 		if ((pw = getpwuid(getuid())) == NULL) {
 			fprintf(stderr, "No user found with uid %u\n",
 			    (u_int)getuid());
 			ret = 1;
 			goto done;
 		}
 
 		for (i = 0; default_files[i]; i++) {
 			snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
 			    default_files[i]);
 			if (stat(buf, &st) == -1)
 				continue;
 			if (do_file(agent_fd, deleting, key_only, cert_only,
 			    buf, qflag, skprovider,
 			    dest_constraints, ndest_constraints) == -1)
 				ret = 1;
 			else
 				count++;
 		}
 		if (count == 0)
 			ret = 1;
 	} else {
 		for (i = 0; i < argc; i++) {
 			if (do_file(agent_fd, deleting, key_only, cert_only,
 			    argv[i], qflag, skprovider,
 			    dest_constraints, ndest_constraints) == -1)
 				ret = 1;
 		}
 	}
 done:
 	clear_pass();
 	ssh_close_authentication_socket(agent_fd);
 	return ret;
 }
diff --git a/ssh-agent.0 b/ssh-agent.0
index 9be740d30e63..2e4ef7b6e382 100644
--- a/ssh-agent.0
+++ b/ssh-agent.0
@@ -1,140 +1,140 @@
 SSH-AGENT(1)                General Commands Manual               SSH-AGENT(1)
 
 NAME
      ssh-agent M-bM-^@M-^S OpenSSH authentication agent
 
 SYNOPSIS
      ssh-agent [-c | -s] [-Dd] [-a bind_address] [-E fingerprint_hash]
                [-O option] [-P allowed_providers] [-t life]
      ssh-agent [-a bind_address] [-E fingerprint_hash] [-O option]
                [-P allowed_providers] [-t life] command [arg ...]
      ssh-agent [-c | -s] -k
 
 DESCRIPTION
      ssh-agent is a program to hold private keys used for public key
      authentication.  Through use of environment variables the agent can be
      located and automatically used for authentication when logging in to
      other machines using ssh(1).
 
      The options are as follows:
 
      -a bind_address
              Bind the agent to the UNIX-domain socket bind_address.  The
              default is $TMPDIR/ssh-XXXXXXXXXX/agent.<ppid>.
 
      -c      Generate C-shell commands on stdout.  This is the default if
              SHELL looks like it's a csh style of shell.
 
      -D      Foreground mode.  When this option is specified, ssh-agent will
              not fork.
 
      -d      Debug mode.  When this option is specified, ssh-agent will not
              fork and will write debug information to standard error.
 
      -E fingerprint_hash
              Specifies the hash algorithm used when displaying key
              fingerprints.  Valid options are: M-bM-^@M-^\md5M-bM-^@M-^] and M-bM-^@M-^\sha256M-bM-^@M-^].  The
              default is M-bM-^@M-^\sha256M-bM-^@M-^].
 
      -k      Kill the current agent (given by the SSH_AGENT_PID environment
              variable).
 
      -O option
              Specify an option when starting ssh-agent.  Currently two options
              are supported: allow-remote-pkcs11 and no-restrict-websafe.
 
              The allow-remote-pkcs11 option allows clients of a forwarded
              ssh-agent to load PKCS#11 or FIDO provider libraries.  By default
              only local clients may perform this operation.  Note that
              signalling that an ssh-agent client is remote is performed by
              ssh(1), and use of other tools to forward access to the agent
              socket may circumvent this restriction.
 
              The no-restrict-websafe option instructs ssh-agent to permit
              signatures using FIDO keys that might be web authentication
              requests.  By default, ssh-agent refuses signature requests for
              FIDO keys where the key application string does not start with
              M-bM-^@M-^\ssh:M-bM-^@M-^] and when the data to be signed does not appear to be a
              ssh(1) user authentication request or a ssh-keygen(1) signature.
              The default behaviour prevents forwarded access to a FIDO key
              from also implicitly forwarding the ability to authenticate to
              websites.
 
      -P allowed_providers
              Specify a pattern-list of acceptable paths for PKCS#11 provider
              and FIDO authenticator middleware shared libraries that may be
              used with the -S or -s options to ssh-add(1).  Libraries that do
              not match the pattern list will be refused.  See PATTERNS in
              ssh_config(5) for a description of pattern-list syntax.  The
              default list is M-bM-^@M-^\usr/lib*/*,/usr/local/lib*/*M-bM-^@M-^].
 
      -s      Generate Bourne shell commands on stdout.  This is the default if
              SHELL does not look like it's a csh style of shell.
 
      -t life
              Set a default value for the maximum lifetime of identities added
              to the agent.  The lifetime may be specified in seconds or in a
              time format specified in sshd_config(5).  A lifetime specified
              for an identity with ssh-add(1) overrides this value.  Without
              this option the default maximum lifetime is forever.
 
      command [arg ...]
              If a command (and optional arguments) is given, this is executed
              as a subprocess of the agent.  The agent exits automatically when
              the command given on the command line terminates.
 
      There are two main ways to get an agent set up.  The first is at the
      start of an X session, where all other windows or programs are started as
      children of the ssh-agent program.  The agent starts a command under
      which its environment variables are exported, for example ssh-agent xterm
      &.  When the command terminates, so does the agent.
 
      The second method is used for a login session.  When ssh-agent is
      started, it prints the shell commands required to set its environment
      variables, which in turn can be evaluated in the calling shell, for
      example eval `ssh-agent -s`.
 
      In both cases, ssh(1) looks at these environment variables and uses them
      to establish a connection to the agent.
 
      The agent initially does not have any private keys.  Keys are added using
      ssh-add(1) or by ssh(1) when AddKeysToAgent is set in ssh_config(5).
      Multiple identities may be stored in ssh-agent concurrently and ssh(1)
      will automatically use them if present.  ssh-add(1) is also used to
      remove keys from ssh-agent and to query the keys that are held in one.
 
      Connections to ssh-agent may be forwarded from further remote hosts using
      the -A option to ssh(1) (but see the caveats documented therein),
      avoiding the need for authentication data to be stored on other machines.
      Authentication passphrases and private keys never go over the network:
      the connection to the agent is forwarded over SSH remote connections and
      the result is returned to the requester, allowing the user access to
      their identities anywhere in the network in a secure fashion.
 
 ENVIRONMENT
      SSH_AGENT_PID  When ssh-agent starts, it stores the name of the agent's
                     process ID (PID) in this variable.
 
      SSH_AUTH_SOCK  When ssh-agent starts, it creates a UNIX-domain socket and
                     stores its pathname in this variable.  It is accessible
                     only to the current user, but is easily abused by root or
                     another instance of the same user.
 
 FILES
      $TMPDIR/ssh-XXXXXXXXXX/agent.<ppid>
              UNIX-domain sockets used to contain the connection to the
              authentication agent.  These sockets should only be readable by
              the owner.  The sockets should get automatically removed when the
              agent exits.
 
 SEE ALSO
      ssh(1), ssh-add(1), ssh-keygen(1), ssh_config(5), sshd(8)
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.
 
-OpenBSD 7.3                     August 10, 2023                    OpenBSD 7.3
+OpenBSD 7.5                     August 10, 2023                    OpenBSD 7.5
diff --git a/ssh-agent.c b/ssh-agent.c
index b6a3f48105ef..d35741a8660f 100644
--- a/ssh-agent.c
+++ b/ssh-agent.c
@@ -1,2468 +1,2478 @@
-/* $OpenBSD: ssh-agent.c,v 1.303 2023/12/18 14:48:08 djm Exp $ */
+/* $OpenBSD: ssh-agent.c,v 1.306 2024/03/09 05:12:13 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * The authentication agent program.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #ifdef HAVE_SYS_UN_H
 # include <sys/un.h>
 #endif
 #include "openbsd-compat/sys-queue.h"
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include "openbsd-compat/openssl-compat.h"
 #endif
 
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #ifdef HAVE_POLL_H
 # include <poll.h>
 #endif
 #include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>
 #include <unistd.h>
 #ifdef HAVE_UTIL_H
 # include <util.h>
 #endif
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "sshbuf.h"
 #include "sshkey.h"
 #include "authfd.h"
 #include "log.h"
 #include "misc.h"
 #include "digest.h"
 #include "ssherr.h"
 #include "match.h"
 #include "msg.h"
 #include "pathnames.h"
 #include "ssh-pkcs11.h"
 #include "sk-api.h"
 #include "myproposal.h"
 
 #ifndef DEFAULT_ALLOWED_PROVIDERS
 # define DEFAULT_ALLOWED_PROVIDERS "/usr/lib*/*,/usr/local/lib*/*"
 #endif
 
 /* Maximum accepted message length */
 #define AGENT_MAX_LEN		(256*1024)
 /* Maximum bytes to read from client socket */
 #define AGENT_RBUF_LEN		(4096)
 /* Maximum number of recorded session IDs/hostkeys per connection */
 #define AGENT_MAX_SESSION_IDS		16
 /* Maximum size of session ID */
 #define AGENT_MAX_SID_LEN		128
 /* Maximum number of destination constraints to accept on a key */
 #define AGENT_MAX_DEST_CONSTRAINTS	1024
 /* Maximum number of associated certificate constraints to accept on a key */
 #define AGENT_MAX_EXT_CERTS		1024
 
 /* XXX store hostkey_sid in a refcounted tree */
 
 typedef enum {
 	AUTH_UNUSED = 0,
 	AUTH_SOCKET = 1,
 	AUTH_CONNECTION = 2,
 } sock_type;
 
 struct hostkey_sid {
 	struct sshkey *key;
 	struct sshbuf *sid;
 	int forwarded;
 };
 
 typedef struct socket_entry {
 	int fd;
 	sock_type type;
 	struct sshbuf *input;
 	struct sshbuf *output;
 	struct sshbuf *request;
 	size_t nsession_ids;
 	struct hostkey_sid *session_ids;
 	int session_bind_attempted;
 } SocketEntry;
 
 u_int sockets_alloc = 0;
 SocketEntry *sockets = NULL;
 
 typedef struct identity {
 	TAILQ_ENTRY(identity) next;
 	struct sshkey *key;
 	char *comment;
 	char *provider;
 	time_t death;
 	u_int confirm;
 	char *sk_provider;
 	struct dest_constraint *dest_constraints;
 	size_t ndest_constraints;
 } Identity;
 
 struct idtable {
 	int nentries;
 	TAILQ_HEAD(idqueue, identity) idlist;
 };
 
 /* private key table */
 struct idtable *idtab;
 
 int max_fd = 0;
 
 /* pid of shell == parent of agent */
 pid_t parent_pid = -1;
 time_t parent_alive_interval = 0;
 
+sig_atomic_t signalled = 0;
+
 /* pid of process for which cleanup_socket is applicable */
 pid_t cleanup_pid = 0;
 
 /* pathname and directory for AUTH_SOCKET */
 char socket_name[PATH_MAX];
 char socket_dir[PATH_MAX];
 
 /* Pattern-list of allowed PKCS#11/Security key paths */
 static char *allowed_providers;
 
 /*
  * Allows PKCS11 providers or SK keys that use non-internal providers to
  * be added over a remote connection (identified by session-bind@openssh.com).
  */
 static int remote_add_provider;
 
 /* locking */
 #define LOCK_SIZE	32
 #define LOCK_SALT_SIZE	16
 #define LOCK_ROUNDS	1
 int locked = 0;
 u_char lock_pwhash[LOCK_SIZE];
 u_char lock_salt[LOCK_SALT_SIZE];
 
 extern char *__progname;
 
 /* Default lifetime in seconds (0 == forever) */
 static int lifetime = 0;
 
 static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
 
 /* Refuse signing of non-SSH messages for web-origin FIDO keys */
 static int restrict_websafe = 1;
 
 static void
 close_socket(SocketEntry *e)
 {
 	size_t i;
 
 	close(e->fd);
 	sshbuf_free(e->input);
 	sshbuf_free(e->output);
 	sshbuf_free(e->request);
 	for (i = 0; i < e->nsession_ids; i++) {
 		sshkey_free(e->session_ids[i].key);
 		sshbuf_free(e->session_ids[i].sid);
 	}
 	free(e->session_ids);
 	memset(e, '\0', sizeof(*e));
 	e->fd = -1;
 	e->type = AUTH_UNUSED;
 }
 
 static void
 idtab_init(void)
 {
 	idtab = xcalloc(1, sizeof(*idtab));
 	TAILQ_INIT(&idtab->idlist);
 	idtab->nentries = 0;
 }
 
 static void
 free_dest_constraint_hop(struct dest_constraint_hop *dch)
 {
 	u_int i;
 
 	if (dch == NULL)
 		return;
 	free(dch->user);
 	free(dch->hostname);
 	for (i = 0; i < dch->nkeys; i++)
 		sshkey_free(dch->keys[i]);
 	free(dch->keys);
 	free(dch->key_is_ca);
 }
 
 static void
 free_dest_constraints(struct dest_constraint *dcs, size_t ndcs)
 {
 	size_t i;
 
 	for (i = 0; i < ndcs; i++) {
 		free_dest_constraint_hop(&dcs[i].from);
 		free_dest_constraint_hop(&dcs[i].to);
 	}
 	free(dcs);
 }
 
+#ifdef ENABLE_PKCS11
 static void
 dup_dest_constraint_hop(const struct dest_constraint_hop *dch,
     struct dest_constraint_hop *out)
 {
 	u_int i;
 	int r;
 
 	out->user = dch->user == NULL ? NULL : xstrdup(dch->user);
 	out->hostname = dch->hostname == NULL ? NULL : xstrdup(dch->hostname);
 	out->is_ca = dch->is_ca;
 	out->nkeys = dch->nkeys;
 	out->keys = out->nkeys == 0 ? NULL :
 	    xcalloc(out->nkeys, sizeof(*out->keys));
 	out->key_is_ca = out->nkeys == 0 ? NULL :
 	    xcalloc(out->nkeys, sizeof(*out->key_is_ca));
 	for (i = 0; i < dch->nkeys; i++) {
 		if (dch->keys[i] != NULL &&
 		    (r = sshkey_from_private(dch->keys[i],
 		    &(out->keys[i]))) != 0)
 			fatal_fr(r, "copy key");
 		out->key_is_ca[i] = dch->key_is_ca[i];
 	}
 }
 
 static struct dest_constraint *
 dup_dest_constraints(const struct dest_constraint *dcs, size_t ndcs)
 {
 	size_t i;
 	struct dest_constraint *ret;
 
 	if (ndcs == 0)
 		return NULL;
 	ret = xcalloc(ndcs, sizeof(*ret));
 	for (i = 0; i < ndcs; i++) {
 		dup_dest_constraint_hop(&dcs[i].from, &ret[i].from);
 		dup_dest_constraint_hop(&dcs[i].to, &ret[i].to);
 	}
 	return ret;
 }
+#endif /* ENABLE_PKCS11 */
 
 #ifdef DEBUG_CONSTRAINTS
 static void
 dump_dest_constraint_hop(const struct dest_constraint_hop *dch)
 {
 	u_int i;
 	char *fp;
 
 	debug_f("user %s hostname %s is_ca %d nkeys %u",
 	    dch->user == NULL ? "(null)" : dch->user,
 	    dch->hostname == NULL ? "(null)" : dch->hostname,
 	    dch->is_ca, dch->nkeys);
 	for (i = 0; i < dch->nkeys; i++) {
 		fp = NULL;
 		if (dch->keys[i] != NULL &&
 		    (fp = sshkey_fingerprint(dch->keys[i],
 		    SSH_FP_HASH_DEFAULT, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		debug_f("key %u/%u: %s%s%s key_is_ca %d", i, dch->nkeys,
 		    dch->keys[i] == NULL ? "" : sshkey_ssh_name(dch->keys[i]),
 		    dch->keys[i] == NULL ? "" : " ",
 		    dch->keys[i] == NULL ? "none" : fp,
 		    dch->key_is_ca[i]);
 		free(fp);
 	}
 }
 #endif /* DEBUG_CONSTRAINTS */
 
 static void
 dump_dest_constraints(const char *context,
     const struct dest_constraint *dcs, size_t ndcs)
 {
 #ifdef DEBUG_CONSTRAINTS
 	size_t i;
 
 	debug_f("%s: %zu constraints", context, ndcs);
 	for (i = 0; i < ndcs; i++) {
 		debug_f("constraint %zu / %zu: from: ", i, ndcs);
 		dump_dest_constraint_hop(&dcs[i].from);
 		debug_f("constraint %zu / %zu: to: ", i, ndcs);
 		dump_dest_constraint_hop(&dcs[i].to);
 	}
 	debug_f("done for %s", context);
 #endif /* DEBUG_CONSTRAINTS */
 }
 
 static void
 free_identity(Identity *id)
 {
 	sshkey_free(id->key);
 	free(id->provider);
 	free(id->comment);
 	free(id->sk_provider);
 	free_dest_constraints(id->dest_constraints, id->ndest_constraints);
 	free(id);
 }
 
 /*
  * Match 'key' against the key/CA list in a destination constraint hop
  * Returns 0 on success or -1 otherwise.
  */
 static int
 match_key_hop(const char *tag, const struct sshkey *key,
     const struct dest_constraint_hop *dch)
 {
 	const char *reason = NULL;
 	const char *hostname = dch->hostname ? dch->hostname : "(ORIGIN)";
 	u_int i;
 	char *fp;
 
 	if (key == NULL)
 		return -1;
 	/* XXX logspam */
 	if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
 	    SSH_FP_DEFAULT)) == NULL)
 		fatal_f("fingerprint failed");
 	debug3_f("%s: entering hostname %s, requested key %s %s, %u keys avail",
 	    tag, hostname, sshkey_type(key), fp, dch->nkeys);
 	free(fp);
 	for (i = 0; i < dch->nkeys; i++) {
 		if (dch->keys[i] == NULL)
 			return -1;
 		/* XXX logspam */
 		if ((fp = sshkey_fingerprint(dch->keys[i], SSH_FP_HASH_DEFAULT,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		debug3_f("%s: key %u: %s%s %s", tag, i,
 		    dch->key_is_ca[i] ? "CA " : "",
 		    sshkey_type(dch->keys[i]), fp);
 		free(fp);
 		if (!sshkey_is_cert(key)) {
 			/* plain key */
 			if (dch->key_is_ca[i] ||
 			    !sshkey_equal(key, dch->keys[i]))
 				continue;
 			return 0;
 		}
 		/* certificate */
 		if (!dch->key_is_ca[i])
 			continue;
 		if (key->cert == NULL || key->cert->signature_key == NULL)
 			return -1; /* shouldn't happen */
 		if (!sshkey_equal(key->cert->signature_key, dch->keys[i]))
 			continue;
 		if (sshkey_cert_check_host(key, hostname, 1,
 		    SSH_ALLOWED_CA_SIGALGS, &reason) != 0) {
 			debug_f("cert %s / hostname %s rejected: %s",
 			    key->cert->key_id, hostname, reason);
 			continue;
 		}
 		return 0;
 	}
 	return -1;
 }
 
 /* Check destination constraints on an identity against the hostkey/user */
 static int
 permitted_by_dest_constraints(const struct sshkey *fromkey,
     const struct sshkey *tokey, Identity *id, const char *user,
     const char **hostnamep)
 {
 	size_t i;
 	struct dest_constraint *d;
 
 	if (hostnamep != NULL)
 		*hostnamep = NULL;
 	for (i = 0; i < id->ndest_constraints; i++) {
 		d = id->dest_constraints + i;
 		/* XXX remove logspam */
 		debug2_f("constraint %zu %s%s%s (%u keys) > %s%s%s (%u keys)",
 		    i, d->from.user ? d->from.user : "",
 		    d->from.user ? "@" : "",
 		    d->from.hostname ? d->from.hostname : "(ORIGIN)",
 		    d->from.nkeys,
 		    d->to.user ? d->to.user : "", d->to.user ? "@" : "",
 		    d->to.hostname ? d->to.hostname : "(ANY)", d->to.nkeys);
 
 		/* Match 'from' key */
 		if (fromkey == NULL) {
 			/* We are matching the first hop */
 			if (d->from.hostname != NULL || d->from.nkeys != 0)
 				continue;
 		} else if (match_key_hop("from", fromkey, &d->from) != 0)
 			continue;
 
 		/* Match 'to' key */
 		if (tokey != NULL && match_key_hop("to", tokey, &d->to) != 0)
 			continue;
 
 		/* Match user if specified */
 		if (d->to.user != NULL && user != NULL &&
 		    !match_pattern(user, d->to.user))
 			continue;
 
 		/* successfully matched this constraint */
 		if (hostnamep != NULL)
 			*hostnamep = d->to.hostname;
 		debug2_f("allowed for hostname %s",
 		    d->to.hostname == NULL ? "*" : d->to.hostname);
 		return 0;
 	}
 	/* no match */
 	debug2_f("%s identity \"%s\" not permitted for this destination",
 	    sshkey_type(id->key), id->comment);
 	return -1;
 }
 
 /*
  * Check whether hostkeys on a SocketEntry and the optionally specified user
  * are permitted by the destination constraints on the Identity.
  * Returns 0 on success or -1 otherwise.
  */
 static int
 identity_permitted(Identity *id, SocketEntry *e, char *user,
     const char **forward_hostnamep, const char **last_hostnamep)
 {
 	size_t i;
 	const char **hp;
 	struct hostkey_sid *hks;
 	const struct sshkey *fromkey = NULL;
 	const char *test_user;
 	char *fp1, *fp2;
 
 	/* XXX remove logspam */
 	debug3_f("entering: key %s comment \"%s\", %zu socket bindings, "
 	    "%zu constraints", sshkey_type(id->key), id->comment,
 	    e->nsession_ids, id->ndest_constraints);
 	if (id->ndest_constraints == 0)
 		return 0; /* unconstrained */
 	if (e->session_bind_attempted && e->nsession_ids == 0) {
 		error_f("previous session bind failed on socket");
 		return -1;
 	}
 	if (e->nsession_ids == 0)
 		return 0; /* local use */
 	/*
 	 * Walk through the hops recorded by session_id and try to find a
 	 * constraint that satisfies each.
 	 */
 	for (i = 0; i < e->nsession_ids; i++) {
 		hks = e->session_ids + i;
 		if (hks->key == NULL)
 			fatal_f("internal error: no bound key");
 		/* XXX remove logspam */
 		fp1 = fp2 = NULL;
 		if (fromkey != NULL &&
 		    (fp1 = sshkey_fingerprint(fromkey, SSH_FP_HASH_DEFAULT,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		if ((fp2 = sshkey_fingerprint(hks->key, SSH_FP_HASH_DEFAULT,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		debug3_f("socketentry fd=%d, entry %zu %s, "
 		    "from hostkey %s %s to user %s hostkey %s %s",
 		    e->fd, i, hks->forwarded ? "FORWARD" : "AUTH",
 		    fromkey ? sshkey_type(fromkey) : "(ORIGIN)",
 		    fromkey ? fp1 : "", user ? user : "(ANY)",
 		    sshkey_type(hks->key), fp2);
 		free(fp1);
 		free(fp2);
 		/*
 		 * Record the hostnames for the initial forwarding and
 		 * the final destination.
 		 */
 		hp = NULL;
 		if (i == e->nsession_ids - 1)
 			hp = last_hostnamep;
 		else if (i == 0)
 			hp = forward_hostnamep;
 		/* Special handling for final recorded binding */
 		test_user = NULL;
 		if (i == e->nsession_ids - 1) {
 			/* Can only check user at final hop */
 			test_user = user;
 			/*
 			 * user is only presented for signature requests.
 			 * If this is the case, make sure last binding is not
 			 * for a forwarding.
 			 */
 			if (hks->forwarded && user != NULL) {
 				error_f("tried to sign on forwarding hop");
 				return -1;
 			}
 		} else if (!hks->forwarded) {
 			error_f("tried to forward though signing bind");
 			return -1;
 		}
 		if (permitted_by_dest_constraints(fromkey, hks->key, id,
 		    test_user, hp) != 0)
 			return -1;
 		fromkey = hks->key;
 	}
 	/*
 	 * Another special case: if the last bound session ID was for a
 	 * forwarding, and this function is not being called to check a sign
 	 * request (i.e. no 'user' supplied), then only permit the key if
 	 * there is a permission that would allow it to be used at another
 	 * destination. This hides keys that are allowed to be used to
 	 * authenticate *to* a host but not permitted for *use* beyond it.
 	 */
 	hks = &e->session_ids[e->nsession_ids - 1];
 	if (hks->forwarded && user == NULL &&
 	    permitted_by_dest_constraints(hks->key, NULL, id,
 	    NULL, NULL) != 0) {
 		debug3_f("key permitted at host but not after");
 		return -1;
 	}
 
 	/* success */
 	return 0;
 }
 
 static int
 socket_is_remote(SocketEntry *e)
 {
 	return e->session_bind_attempted || (e->nsession_ids != 0);
 }
 
 /* return matching private key for given public key */
 static Identity *
 lookup_identity(struct sshkey *key)
 {
 	Identity *id;
 
 	TAILQ_FOREACH(id, &idtab->idlist, next) {
 		if (sshkey_equal(key, id->key))
 			return (id);
 	}
 	return (NULL);
 }
 
 /* Check confirmation of keysign request */
 static int
 confirm_key(Identity *id, const char *extra)
 {
 	char *p;
 	int ret = -1;
 
 	p = sshkey_fingerprint(id->key, fingerprint_hash, SSH_FP_DEFAULT);
 	if (p != NULL &&
 	    ask_permission("Allow use of key %s?\nKey fingerprint %s.%s%s",
 	    id->comment, p,
 	    extra == NULL ? "" : "\n", extra == NULL ? "" : extra))
 		ret = 0;
 	free(p);
 
 	return (ret);
 }
 
 static void
 send_status(SocketEntry *e, int success)
 {
 	int r;
 
 	if ((r = sshbuf_put_u32(e->output, 1)) != 0 ||
 	    (r = sshbuf_put_u8(e->output, success ?
 	    SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE)) != 0)
 		fatal_fr(r, "compose");
 }
 
 /* send list of supported public keys to 'client' */
 static void
 process_request_identities(SocketEntry *e)
 {
 	Identity *id;
 	struct sshbuf *msg, *keys;
 	int r;
 	u_int i = 0, nentries = 0;
 	char *fp;
 
 	debug2_f("entering");
 
 	if ((msg = sshbuf_new()) == NULL || (keys = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	TAILQ_FOREACH(id, &idtab->idlist, next) {
 		if ((fp = sshkey_fingerprint(id->key, SSH_FP_HASH_DEFAULT,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		debug_f("key %u / %u: %s %s", i++, idtab->nentries,
 		    sshkey_ssh_name(id->key), fp);
 		dump_dest_constraints(__func__,
 		    id->dest_constraints, id->ndest_constraints);
 		free(fp);
 		/* identity not visible, don't include in response */
 		if (identity_permitted(id, e, NULL, NULL, NULL) != 0)
 			continue;
 		if ((r = sshkey_puts_opts(id->key, keys,
 		    SSHKEY_SERIALIZE_INFO)) != 0 ||
 		    (r = sshbuf_put_cstring(keys, id->comment)) != 0) {
 			error_fr(r, "compose key/comment");
 			continue;
 		}
 		nentries++;
 	}
 	debug2_f("replying with %u allowed of %u available keys",
 	    nentries, idtab->nentries);
 	if ((r = sshbuf_put_u8(msg, SSH2_AGENT_IDENTITIES_ANSWER)) != 0 ||
 	    (r = sshbuf_put_u32(msg, nentries)) != 0 ||
 	    (r = sshbuf_putb(msg, keys)) != 0)
 		fatal_fr(r, "compose");
 	if ((r = sshbuf_put_stringb(e->output, msg)) != 0)
 		fatal_fr(r, "enqueue");
 	sshbuf_free(msg);
 	sshbuf_free(keys);
 }
 
 
 static char *
 agent_decode_alg(struct sshkey *key, u_int flags)
 {
 	if (key->type == KEY_RSA) {
 		if (flags & SSH_AGENT_RSA_SHA2_256)
 			return "rsa-sha2-256";
 		else if (flags & SSH_AGENT_RSA_SHA2_512)
 			return "rsa-sha2-512";
 	} else if (key->type == KEY_RSA_CERT) {
 		if (flags & SSH_AGENT_RSA_SHA2_256)
 			return "rsa-sha2-256-cert-v01@openssh.com";
 		else if (flags & SSH_AGENT_RSA_SHA2_512)
 			return "rsa-sha2-512-cert-v01@openssh.com";
 	}
 	return NULL;
 }
 
 /*
  * Attempt to parse the contents of a buffer as a SSH publickey userauth
  * request, checking its contents for consistency and matching the embedded
  * key against the one that is being used for signing.
  * Note: does not modify msg buffer.
  * Optionally extract the username, session ID and/or hostkey from the request.
  */
 static int
 parse_userauth_request(struct sshbuf *msg, const struct sshkey *expected_key,
     char **userp, struct sshbuf **sess_idp, struct sshkey **hostkeyp)
 {
 	struct sshbuf *b = NULL, *sess_id = NULL;
 	char *user = NULL, *service = NULL, *method = NULL, *pkalg = NULL;
 	int r;
 	u_char t, sig_follows;
 	struct sshkey *mkey = NULL, *hostkey = NULL;
 
 	if (userp != NULL)
 		*userp = NULL;
 	if (sess_idp != NULL)
 		*sess_idp = NULL;
 	if (hostkeyp != NULL)
 		*hostkeyp = NULL;
 	if ((b = sshbuf_fromb(msg)) == NULL)
 		fatal_f("sshbuf_fromb");
 
 	/* SSH userauth request */
 	if ((r = sshbuf_froms(b, &sess_id)) != 0)
 		goto out;
 	if (sshbuf_len(sess_id) == 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if ((r = sshbuf_get_u8(b, &t)) != 0 || /* SSH2_MSG_USERAUTH_REQUEST */
 	    (r = sshbuf_get_cstring(b, &user, NULL)) != 0 || /* server user */
 	    (r = sshbuf_get_cstring(b, &service, NULL)) != 0 || /* service */
 	    (r = sshbuf_get_cstring(b, &method, NULL)) != 0 || /* method */
 	    (r = sshbuf_get_u8(b, &sig_follows)) != 0 || /* sig-follows */
 	    (r = sshbuf_get_cstring(b, &pkalg, NULL)) != 0 || /* alg */
 	    (r = sshkey_froms(b, &mkey)) != 0) /* key */
 		goto out;
 	if (t != SSH2_MSG_USERAUTH_REQUEST ||
 	    sig_follows != 1 ||
 	    strcmp(service, "ssh-connection") != 0 ||
 	    !sshkey_equal(expected_key, mkey) ||
 	    sshkey_type_from_name(pkalg) != expected_key->type) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if (strcmp(method, "publickey-hostbound-v00@openssh.com") == 0) {
 		if ((r = sshkey_froms(b, &hostkey)) != 0)
 			goto out;
 	} else if (strcmp(method, "publickey") != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if (sshbuf_len(b) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	/* success */
 	r = 0;
 	debug3_f("well formed userauth");
 	if (userp != NULL) {
 		*userp = user;
 		user = NULL;
 	}
 	if (sess_idp != NULL) {
 		*sess_idp = sess_id;
 		sess_id = NULL;
 	}
 	if (hostkeyp != NULL) {
 		*hostkeyp = hostkey;
 		hostkey = NULL;
 	}
  out:
 	sshbuf_free(b);
 	sshbuf_free(sess_id);
 	free(user);
 	free(service);
 	free(method);
 	free(pkalg);
 	sshkey_free(mkey);
 	sshkey_free(hostkey);
 	return r;
 }
 
 /*
  * Attempt to parse the contents of a buffer as a SSHSIG signature request.
  * Note: does not modify buffer.
  */
 static int
 parse_sshsig_request(struct sshbuf *msg)
 {
 	int r;
 	struct sshbuf *b;
 
 	if ((b = sshbuf_fromb(msg)) == NULL)
 		fatal_f("sshbuf_fromb");
 
 	if ((r = sshbuf_cmp(b, 0, "SSHSIG", 6)) != 0 ||
 	    (r = sshbuf_consume(b, 6)) != 0 ||
 	    (r = sshbuf_get_cstring(b, NULL, NULL)) != 0 || /* namespace */
 	    (r = sshbuf_get_string_direct(b, NULL, NULL)) != 0 || /* reserved */
 	    (r = sshbuf_get_cstring(b, NULL, NULL)) != 0 || /* hashalg */
 	    (r = sshbuf_get_string_direct(b, NULL, NULL)) != 0) /* H(msg) */
 		goto out;
 	if (sshbuf_len(b) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	return r;
 }
 
 /*
  * This function inspects a message to be signed by a FIDO key that has a
  * web-like application string (i.e. one that does not begin with "ssh:".
  * It checks that the message is one of those expected for SSH operations
  * (pubkey userauth, sshsig, CA key signing) to exclude signing challenges
  * for the web.
  */
 static int
 check_websafe_message_contents(struct sshkey *key, struct sshbuf *data)
 {
 	if (parse_userauth_request(data, key, NULL, NULL, NULL) == 0) {
 		debug_f("signed data matches public key userauth request");
 		return 1;
 	}
 	if (parse_sshsig_request(data) == 0) {
 		debug_f("signed data matches SSHSIG signature request");
 		return 1;
 	}
 
 	/* XXX check CA signature operation */
 
 	error("web-origin key attempting to sign non-SSH message");
 	return 0;
 }
 
 static int
 buf_equal(const struct sshbuf *a, const struct sshbuf *b)
 {
 	if (sshbuf_ptr(a) == NULL || sshbuf_ptr(b) == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (sshbuf_len(a) != sshbuf_len(b))
 		return SSH_ERR_INVALID_FORMAT;
 	if (timingsafe_bcmp(sshbuf_ptr(a), sshbuf_ptr(b), sshbuf_len(a)) != 0)
 		return SSH_ERR_INVALID_FORMAT;
 	return 0;
 }
 
 /* ssh2 only */
 static void
 process_sign_request2(SocketEntry *e)
 {
 	u_char *signature = NULL;
 	size_t slen = 0;
 	u_int compat = 0, flags;
 	int r, ok = -1, retried = 0;
 	char *fp = NULL, *pin = NULL, *prompt = NULL;
 	char *user = NULL, *sig_dest = NULL;
 	const char *fwd_host = NULL, *dest_host = NULL;
 	struct sshbuf *msg = NULL, *data = NULL, *sid = NULL;
 	struct sshkey *key = NULL, *hostkey = NULL;
 	struct identity *id;
 	struct notifier_ctx *notifier = NULL;
 
 	debug_f("entering");
 
 	if ((msg = sshbuf_new()) == NULL || (data = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshkey_froms(e->request, &key)) != 0 ||
 	    (r = sshbuf_get_stringb(e->request, data)) != 0 ||
 	    (r = sshbuf_get_u32(e->request, &flags)) != 0) {
 		error_fr(r, "parse");
 		goto send;
 	}
 
 	if ((id = lookup_identity(key)) == NULL) {
 		verbose_f("%s key not found", sshkey_type(key));
 		goto send;
 	}
 	if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
 	    SSH_FP_DEFAULT)) == NULL)
 		fatal_f("fingerprint failed");
 
 	if (id->ndest_constraints != 0) {
 		if (e->nsession_ids == 0) {
 			logit_f("refusing use of destination-constrained key "
 			    "to sign on unbound connection");
 			goto send;
 		}
 		if (parse_userauth_request(data, key, &user, &sid,
 		    &hostkey) != 0) {
 			logit_f("refusing use of destination-constrained key "
 			   "to sign an unidentified signature");
 			goto send;
 		}
 		/* XXX logspam */
 		debug_f("user=%s", user);
 		if (identity_permitted(id, e, user, &fwd_host, &dest_host) != 0)
 			goto send;
 		/* XXX display fwd_host/dest_host in askpass UI */
 		/*
 		 * Ensure that the session ID is the most recent one
 		 * registered on the socket - it should have been bound by
 		 * ssh immediately before userauth.
 		 */
 		if (buf_equal(sid,
 		    e->session_ids[e->nsession_ids - 1].sid) != 0) {
 			error_f("unexpected session ID (%zu listed) on "
 			    "signature request for target user %s with "
 			    "key %s %s", e->nsession_ids, user,
 			    sshkey_type(id->key), fp);
 			goto send;
 		}
 		/*
 		 * Ensure that the hostkey embedded in the signature matches
 		 * the one most recently bound to the socket. An exception is
 		 * made for the initial forwarding hop.
 		 */
 		if (e->nsession_ids > 1 && hostkey == NULL) {
 			error_f("refusing use of destination-constrained key: "
 			    "no hostkey recorded in signature for forwarded "
 			    "connection");
 			goto send;
 		}
 		if (hostkey != NULL && !sshkey_equal(hostkey,
 		    e->session_ids[e->nsession_ids - 1].key)) {
 			error_f("refusing use of destination-constrained key: "
 			    "mismatch between hostkey in request and most "
 			    "recently bound session");
 			goto send;
 		}
 		xasprintf(&sig_dest, "public key authentication request for "
 		    "user \"%s\" to listed host", user);
 	}
 	if (id->confirm && confirm_key(id, sig_dest) != 0) {
 		verbose_f("user refused key");
 		goto send;
 	}
 	if (sshkey_is_sk(id->key)) {
 		if (restrict_websafe &&
 		    strncmp(id->key->sk_application, "ssh:", 4) != 0 &&
 		    !check_websafe_message_contents(key, data)) {
 			/* error already logged */
 			goto send;
 		}
 		if (id->key->sk_flags & SSH_SK_USER_PRESENCE_REQD) {
 			notifier = notify_start(0,
 			    "Confirm user presence for key %s %s%s%s",
 			    sshkey_type(id->key), fp,
 			    sig_dest == NULL ? "" : "\n",
 			    sig_dest == NULL ? "" : sig_dest);
 		}
 	}
  retry_pin:
 	if ((r = sshkey_sign(id->key, &signature, &slen,
 	    sshbuf_ptr(data), sshbuf_len(data), agent_decode_alg(key, flags),
 	    id->sk_provider, pin, compat)) != 0) {
 		debug_fr(r, "sshkey_sign");
 		if (pin == NULL && !retried && sshkey_is_sk(id->key) &&
 		    r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
 			notify_complete(notifier, NULL);
 			notifier = NULL;
 			/* XXX include sig_dest */
 			xasprintf(&prompt, "Enter PIN%sfor %s key %s: ",
 			    (id->key->sk_flags & SSH_SK_USER_PRESENCE_REQD) ?
 			    " and confirm user presence " : " ",
 			    sshkey_type(id->key), fp);
 			pin = read_passphrase(prompt, RP_USE_ASKPASS);
 			retried = 1;
 			goto retry_pin;
 		}
 		error_fr(r, "sshkey_sign");
 		goto send;
 	}
 	/* Success */
 	ok = 0;
 	debug_f("good signature");
  send:
 	notify_complete(notifier, "User presence confirmed");
 
 	if (ok == 0) {
 		if ((r = sshbuf_put_u8(msg, SSH2_AGENT_SIGN_RESPONSE)) != 0 ||
 		    (r = sshbuf_put_string(msg, signature, slen)) != 0)
 			fatal_fr(r, "compose");
 	} else if ((r = sshbuf_put_u8(msg, SSH_AGENT_FAILURE)) != 0)
 		fatal_fr(r, "compose failure");
 
 	if ((r = sshbuf_put_stringb(e->output, msg)) != 0)
 		fatal_fr(r, "enqueue");
 
 	sshbuf_free(sid);
 	sshbuf_free(data);
 	sshbuf_free(msg);
 	sshkey_free(key);
 	sshkey_free(hostkey);
 	free(fp);
 	free(signature);
 	free(sig_dest);
 	free(user);
 	free(prompt);
 	if (pin != NULL)
 		freezero(pin, strlen(pin));
 }
 
 /* shared */
 static void
 process_remove_identity(SocketEntry *e)
 {
 	int r, success = 0;
 	struct sshkey *key = NULL;
 	Identity *id;
 
 	debug2_f("entering");
 	if ((r = sshkey_froms(e->request, &key)) != 0) {
 		error_fr(r, "parse key");
 		goto done;
 	}
 	if ((id = lookup_identity(key)) == NULL) {
 		debug_f("key not found");
 		goto done;
 	}
 	/* identity not visible, cannot be removed */
 	if (identity_permitted(id, e, NULL, NULL, NULL) != 0)
 		goto done; /* error already logged */
 	/* We have this key, free it. */
 	if (idtab->nentries < 1)
 		fatal_f("internal error: nentries %d", idtab->nentries);
 	TAILQ_REMOVE(&idtab->idlist, id, next);
 	free_identity(id);
 	idtab->nentries--;
 	success = 1;
  done:
 	sshkey_free(key);
 	send_status(e, success);
 }
 
 static void
 process_remove_all_identities(SocketEntry *e)
 {
 	Identity *id;
 
 	debug2_f("entering");
 	/* Loop over all identities and clear the keys. */
 	for (id = TAILQ_FIRST(&idtab->idlist); id;
 	    id = TAILQ_FIRST(&idtab->idlist)) {
 		TAILQ_REMOVE(&idtab->idlist, id, next);
 		free_identity(id);
 	}
 
 	/* Mark that there are no identities. */
 	idtab->nentries = 0;
 
 	/* Send success. */
 	send_status(e, 1);
 }
 
 /* removes expired keys and returns number of seconds until the next expiry */
 static time_t
 reaper(void)
 {
 	time_t deadline = 0, now = monotime();
 	Identity *id, *nxt;
 
 	for (id = TAILQ_FIRST(&idtab->idlist); id; id = nxt) {
 		nxt = TAILQ_NEXT(id, next);
 		if (id->death == 0)
 			continue;
 		if (now >= id->death) {
 			debug("expiring key '%s'", id->comment);
 			TAILQ_REMOVE(&idtab->idlist, id, next);
 			free_identity(id);
 			idtab->nentries--;
 		} else
 			deadline = (deadline == 0) ? id->death :
 			    MINIMUM(deadline, id->death);
 	}
 	if (deadline == 0 || deadline <= now)
 		return 0;
 	else
 		return (deadline - now);
 }
 
 static int
 parse_dest_constraint_hop(struct sshbuf *b, struct dest_constraint_hop *dch)
 {
 	u_char key_is_ca;
 	size_t elen = 0;
 	int r;
 	struct sshkey *k = NULL;
 	char *fp;
 
 	memset(dch, '\0', sizeof(*dch));
 	if ((r = sshbuf_get_cstring(b, &dch->user, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(b, &dch->hostname, NULL)) != 0 ||
 	    (r = sshbuf_get_string_direct(b, NULL, &elen)) != 0) {
 		error_fr(r, "parse");
 		goto out;
 	}
 	if (elen != 0) {
 		error_f("unsupported extensions (len %zu)", elen);
 		r = SSH_ERR_FEATURE_UNSUPPORTED;
 		goto out;
 	}
 	if (*dch->hostname == '\0') {
 		free(dch->hostname);
 		dch->hostname = NULL;
 	}
 	if (*dch->user == '\0') {
 		free(dch->user);
 		dch->user = NULL;
 	}
 	while (sshbuf_len(b) != 0) {
 		dch->keys = xrecallocarray(dch->keys, dch->nkeys,
 		    dch->nkeys + 1, sizeof(*dch->keys));
 		dch->key_is_ca = xrecallocarray(dch->key_is_ca, dch->nkeys,
 		    dch->nkeys + 1, sizeof(*dch->key_is_ca));
 		if ((r = sshkey_froms(b, &k)) != 0 ||
 		    (r = sshbuf_get_u8(b, &key_is_ca)) != 0)
 			goto out;
 		if ((fp = sshkey_fingerprint(k, SSH_FP_HASH_DEFAULT,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		debug3_f("%s%s%s: adding %skey %s %s",
 		    dch->user == NULL ? "" : dch->user,
 		    dch->user == NULL ? "" : "@",
 		    dch->hostname, key_is_ca ? "CA " : "", sshkey_type(k), fp);
 		free(fp);
 		dch->keys[dch->nkeys] = k;
 		dch->key_is_ca[dch->nkeys] = key_is_ca != 0;
 		dch->nkeys++;
 		k = NULL; /* transferred */
 	}
 	/* success */
 	r = 0;
  out:
 	sshkey_free(k);
 	return r;
 }
 
 static int
 parse_dest_constraint(struct sshbuf *m, struct dest_constraint *dc)
 {
 	struct sshbuf *b = NULL, *frombuf = NULL, *tobuf = NULL;
 	int r;
 	size_t elen = 0;
 
 	debug3_f("entering");
 
 	memset(dc, '\0', sizeof(*dc));
 	if ((r = sshbuf_froms(m, &b)) != 0 ||
 	    (r = sshbuf_froms(b, &frombuf)) != 0 ||
 	    (r = sshbuf_froms(b, &tobuf)) != 0 ||
 	    (r = sshbuf_get_string_direct(b, NULL, &elen)) != 0) {
 		error_fr(r, "parse");
 		goto out;
 	}
 	if ((r = parse_dest_constraint_hop(frombuf, &dc->from)) != 0 ||
 	    (r = parse_dest_constraint_hop(tobuf, &dc->to)) != 0)
 		goto out; /* already logged */
 	if (elen != 0) {
 		error_f("unsupported extensions (len %zu)", elen);
 		r = SSH_ERR_FEATURE_UNSUPPORTED;
 		goto out;
 	}
 	debug2_f("parsed %s (%u keys) > %s%s%s (%u keys)",
 	    dc->from.hostname ? dc->from.hostname : "(ORIGIN)", dc->from.nkeys,
 	    dc->to.user ? dc->to.user : "", dc->to.user ? "@" : "",
 	    dc->to.hostname ? dc->to.hostname : "(ANY)", dc->to.nkeys);
 	/* check consistency */
 	if ((dc->from.hostname == NULL) != (dc->from.nkeys == 0) ||
 	    dc->from.user != NULL) {
 		error_f("inconsistent \"from\" specification");
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if (dc->to.hostname == NULL || dc->to.nkeys == 0) {
 		error_f("incomplete \"to\" specification");
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	sshbuf_free(frombuf);
 	sshbuf_free(tobuf);
 	return r;
 }
 
 static int
 parse_key_constraint_extension(struct sshbuf *m, char **sk_providerp,
     struct dest_constraint **dcsp, size_t *ndcsp, int *cert_onlyp,
     struct sshkey ***certs, size_t *ncerts)
 {
 	char *ext_name = NULL;
 	int r;
 	struct sshbuf *b = NULL;
 	u_char v;
 	struct sshkey *k;
 
 	if ((r = sshbuf_get_cstring(m, &ext_name, NULL)) != 0) {
 		error_fr(r, "parse constraint extension");
 		goto out;
 	}
 	debug_f("constraint ext %s", ext_name);
 	if (strcmp(ext_name, "sk-provider@openssh.com") == 0) {
 		if (sk_providerp == NULL) {
 			error_f("%s not valid here", ext_name);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		if (*sk_providerp != NULL) {
 			error_f("%s already set", ext_name);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		if ((r = sshbuf_get_cstring(m, sk_providerp, NULL)) != 0) {
 			error_fr(r, "parse %s", ext_name);
 			goto out;
 		}
 	} else if (strcmp(ext_name,
 	    "restrict-destination-v00@openssh.com") == 0) {
 		if (*dcsp != NULL) {
 			error_f("%s already set", ext_name);
 			goto out;
 		}
 		if ((r = sshbuf_froms(m, &b)) != 0) {
 			error_fr(r, "parse %s outer", ext_name);
 			goto out;
 		}
 		while (sshbuf_len(b) != 0) {
 			if (*ndcsp >= AGENT_MAX_DEST_CONSTRAINTS) {
 				error_f("too many %s constraints", ext_name);
 				goto out;
 			}
 			*dcsp = xrecallocarray(*dcsp, *ndcsp, *ndcsp + 1,
 			    sizeof(**dcsp));
 			if ((r = parse_dest_constraint(b,
 			    *dcsp + (*ndcsp)++)) != 0)
 				goto out; /* error already logged */
 		}
 	} else if (strcmp(ext_name,
 	    "associated-certs-v00@openssh.com") == 0) {
 		if (certs == NULL || ncerts == NULL || cert_onlyp == NULL) {
 			error_f("%s not valid here", ext_name);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		if (*certs != NULL) {
 			error_f("%s already set", ext_name);
 			goto out;
 		}
 		if ((r = sshbuf_get_u8(m, &v)) != 0 ||
 		    (r = sshbuf_froms(m, &b)) != 0) {
 			error_fr(r, "parse %s", ext_name);
 			goto out;
 		}
 		*cert_onlyp = v != 0;
 		while (sshbuf_len(b) != 0) {
 			if (*ncerts >= AGENT_MAX_EXT_CERTS) {
 				error_f("too many %s constraints", ext_name);
 				goto out;
 			}
 			*certs = xrecallocarray(*certs, *ncerts, *ncerts + 1,
 			    sizeof(**certs));
 			if ((r = sshkey_froms(b, &k)) != 0) {
 				error_fr(r, "parse key");
 				goto out;
 			}
 			(*certs)[(*ncerts)++] = k;
 		}
 	} else {
 		error_f("unsupported constraint \"%s\"", ext_name);
 		r = SSH_ERR_FEATURE_UNSUPPORTED;
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	free(ext_name);
 	sshbuf_free(b);
 	return r;
 }
 
 static int
 parse_key_constraints(struct sshbuf *m, struct sshkey *k, time_t *deathp,
     u_int *secondsp, int *confirmp, char **sk_providerp,
     struct dest_constraint **dcsp, size_t *ndcsp,
     int *cert_onlyp, size_t *ncerts, struct sshkey ***certs)
 {
 	u_char ctype;
 	int r;
 	u_int seconds, maxsign = 0;
 
 	while (sshbuf_len(m)) {
 		if ((r = sshbuf_get_u8(m, &ctype)) != 0) {
 			error_fr(r, "parse constraint type");
 			goto out;
 		}
 		switch (ctype) {
 		case SSH_AGENT_CONSTRAIN_LIFETIME:
 			if (*deathp != 0) {
 				error_f("lifetime already set");
 				r = SSH_ERR_INVALID_FORMAT;
 				goto out;
 			}
 			if ((r = sshbuf_get_u32(m, &seconds)) != 0) {
 				error_fr(r, "parse lifetime constraint");
 				goto out;
 			}
 			*deathp = monotime() + seconds;
 			*secondsp = seconds;
 			break;
 		case SSH_AGENT_CONSTRAIN_CONFIRM:
 			if (*confirmp != 0) {
 				error_f("confirm already set");
 				r = SSH_ERR_INVALID_FORMAT;
 				goto out;
 			}
 			*confirmp = 1;
 			break;
 		case SSH_AGENT_CONSTRAIN_MAXSIGN:
 			if (k == NULL) {
 				error_f("maxsign not valid here");
 				r = SSH_ERR_INVALID_FORMAT;
 				goto out;
 			}
 			if (maxsign != 0) {
 				error_f("maxsign already set");
 				r = SSH_ERR_INVALID_FORMAT;
 				goto out;
 			}
 			if ((r = sshbuf_get_u32(m, &maxsign)) != 0) {
 				error_fr(r, "parse maxsign constraint");
 				goto out;
 			}
 			if ((r = sshkey_enable_maxsign(k, maxsign)) != 0) {
 				error_fr(r, "enable maxsign");
 				goto out;
 			}
 			break;
 		case SSH_AGENT_CONSTRAIN_EXTENSION:
 			if ((r = parse_key_constraint_extension(m,
 			    sk_providerp, dcsp, ndcsp,
 			    cert_onlyp, certs, ncerts)) != 0)
 				goto out; /* error already logged */
 			break;
 		default:
 			error_f("Unknown constraint %d", ctype);
 			r = SSH_ERR_FEATURE_UNSUPPORTED;
 			goto out;
 		}
 	}
 	/* success */
 	r = 0;
  out:
 	return r;
 }
 
 static void
 process_add_identity(SocketEntry *e)
 {
 	Identity *id;
 	int success = 0, confirm = 0;
 	char *fp, *comment = NULL, *sk_provider = NULL;
 	char canonical_provider[PATH_MAX];
 	time_t death = 0;
 	u_int seconds = 0;
 	struct dest_constraint *dest_constraints = NULL;
 	size_t ndest_constraints = 0;
 	struct sshkey *k = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	debug2_f("entering");
 	if ((r = sshkey_private_deserialize(e->request, &k)) != 0 ||
 	    k == NULL ||
 	    (r = sshbuf_get_cstring(e->request, &comment, NULL)) != 0) {
 		error_fr(r, "parse");
 		goto out;
 	}
 	if (parse_key_constraints(e->request, k, &death, &seconds, &confirm,
 	    &sk_provider, &dest_constraints, &ndest_constraints,
 	    NULL, NULL, NULL) != 0) {
 		error_f("failed to parse constraints");
 		sshbuf_reset(e->request);
 		goto out;
 	}
 	dump_dest_constraints(__func__, dest_constraints, ndest_constraints);
 
 	if (sk_provider != NULL) {
 		if (!sshkey_is_sk(k)) {
 			error("Cannot add provider: %s is not an "
 			    "authenticator-hosted key", sshkey_type(k));
 			goto out;
 		}
 		if (strcasecmp(sk_provider, "internal") == 0) {
 			debug_f("internal provider");
 		} else {
 			if (socket_is_remote(e) && !remote_add_provider) {
 				verbose("failed add of SK provider \"%.100s\": "
 				    "remote addition of providers is disabled",
 				    sk_provider);
 				goto out;
 			}
 			if (realpath(sk_provider, canonical_provider) == NULL) {
 				verbose("failed provider \"%.100s\": "
 				    "realpath: %s", sk_provider,
 				    strerror(errno));
 				goto out;
 			}
 			free(sk_provider);
 			sk_provider = xstrdup(canonical_provider);
 			if (match_pattern_list(sk_provider,
 			    allowed_providers, 0) != 1) {
 				error("Refusing add key: "
 				    "provider %s not allowed", sk_provider);
 				goto out;
 			}
 		}
 	}
 	if ((r = sshkey_shield_private(k)) != 0) {
 		error_fr(r, "shield private");
 		goto out;
 	}
 	if (lifetime && !death)
 		death = monotime() + lifetime;
 	if ((id = lookup_identity(k)) == NULL) {
 		id = xcalloc(1, sizeof(Identity));
 		TAILQ_INSERT_TAIL(&idtab->idlist, id, next);
 		/* Increment the number of identities. */
 		idtab->nentries++;
 	} else {
 		/* identity not visible, do not update */
 		if (identity_permitted(id, e, NULL, NULL, NULL) != 0)
 			goto out; /* error already logged */
 		/* key state might have been updated */
 		sshkey_free(id->key);
 		free(id->comment);
 		free(id->sk_provider);
 		free_dest_constraints(id->dest_constraints,
 		    id->ndest_constraints);
 	}
 	/* success */
 	id->key = k;
 	id->comment = comment;
 	id->death = death;
 	id->confirm = confirm;
 	id->sk_provider = sk_provider;
 	id->dest_constraints = dest_constraints;
 	id->ndest_constraints = ndest_constraints;
 
 	if ((fp = sshkey_fingerprint(k, SSH_FP_HASH_DEFAULT,
 	    SSH_FP_DEFAULT)) == NULL)
 		fatal_f("sshkey_fingerprint failed");
 	debug_f("add %s %s \"%.100s\" (life: %u) (confirm: %u) "
 	    "(provider: %s) (destination constraints: %zu)",
 	    sshkey_ssh_name(k), fp, comment, seconds, confirm,
 	    sk_provider == NULL ? "none" : sk_provider, ndest_constraints);
 	free(fp);
 	/* transferred */
 	k = NULL;
 	comment = NULL;
 	sk_provider = NULL;
 	dest_constraints = NULL;
 	ndest_constraints = 0;
 	success = 1;
  out:
 	free(sk_provider);
 	free(comment);
 	sshkey_free(k);
 	free_dest_constraints(dest_constraints, ndest_constraints);
 	send_status(e, success);
 }
 
 /* XXX todo: encrypt sensitive data with passphrase */
 static void
 process_lock_agent(SocketEntry *e, int lock)
 {
 	int r, success = 0, delay;
 	char *passwd;
 	u_char passwdhash[LOCK_SIZE];
 	static u_int fail_count = 0;
 	size_t pwlen;
 
 	debug2_f("entering");
 	/*
 	 * This is deliberately fatal: the user has requested that we lock,
 	 * but we can't parse their request properly. The only safe thing to
 	 * do is abort.
 	 */
 	if ((r = sshbuf_get_cstring(e->request, &passwd, &pwlen)) != 0)
 		fatal_fr(r, "parse");
 	if (pwlen == 0) {
 		debug("empty password not supported");
 	} else if (locked && !lock) {
 		if (bcrypt_pbkdf(passwd, pwlen, lock_salt, sizeof(lock_salt),
 		    passwdhash, sizeof(passwdhash), LOCK_ROUNDS) < 0)
 			fatal("bcrypt_pbkdf");
 		if (timingsafe_bcmp(passwdhash, lock_pwhash, LOCK_SIZE) == 0) {
 			debug("agent unlocked");
 			locked = 0;
 			fail_count = 0;
 			explicit_bzero(lock_pwhash, sizeof(lock_pwhash));
 			success = 1;
 		} else {
 			/* delay in 0.1s increments up to 10s */
 			if (fail_count < 100)
 				fail_count++;
 			delay = 100000 * fail_count;
 			debug("unlock failed, delaying %0.1lf seconds",
 			    (double)delay/1000000);
 			usleep(delay);
 		}
 		explicit_bzero(passwdhash, sizeof(passwdhash));
 	} else if (!locked && lock) {
 		debug("agent locked");
 		locked = 1;
 		arc4random_buf(lock_salt, sizeof(lock_salt));
 		if (bcrypt_pbkdf(passwd, pwlen, lock_salt, sizeof(lock_salt),
 		    lock_pwhash, sizeof(lock_pwhash), LOCK_ROUNDS) < 0)
 			fatal("bcrypt_pbkdf");
 		success = 1;
 	}
 	freezero(passwd, pwlen);
 	send_status(e, success);
 }
 
 static void
 no_identities(SocketEntry *e)
 {
 	struct sshbuf *msg;
 	int r;
 
 	if ((msg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_put_u8(msg, SSH2_AGENT_IDENTITIES_ANSWER)) != 0 ||
 	    (r = sshbuf_put_u32(msg, 0)) != 0 ||
 	    (r = sshbuf_put_stringb(e->output, msg)) != 0)
 		fatal_fr(r, "compose");
 	sshbuf_free(msg);
 }
 
+#ifdef ENABLE_PKCS11
 /* Add an identity to idlist; takes ownership of 'key' and 'comment' */
 static void
 add_p11_identity(struct sshkey *key, char *comment, const char *provider,
-    time_t death, int confirm, struct dest_constraint *dest_constraints,
+    time_t death, u_int confirm, struct dest_constraint *dest_constraints,
     size_t ndest_constraints)
 {
 	Identity *id;
 
 	if (lookup_identity(key) != NULL) {
 		sshkey_free(key);
 		free(comment);
 		return;
 	}
 	id = xcalloc(1, sizeof(Identity));
 	id->key = key;
 	id->comment = comment;
 	id->provider = xstrdup(provider);
 	id->death = death;
 	id->confirm = confirm;
 	id->dest_constraints = dup_dest_constraints(dest_constraints,
 	    ndest_constraints);
 	id->ndest_constraints = ndest_constraints;
 	TAILQ_INSERT_TAIL(&idtab->idlist, id, next);
 	idtab->nentries++;
 }
 
-#ifdef ENABLE_PKCS11
 static void
 process_add_smartcard_key(SocketEntry *e)
 {
 	char *provider = NULL, *pin = NULL, canonical_provider[PATH_MAX];
 	char **comments = NULL;
 	int r, i, count = 0, success = 0, confirm = 0;
 	u_int seconds = 0;
 	time_t death = 0;
 	struct sshkey **keys = NULL, *k;
 	struct dest_constraint *dest_constraints = NULL;
 	size_t j, ndest_constraints = 0, ncerts = 0;
 	struct sshkey **certs = NULL;
 	int cert_only = 0;
 
 	debug2_f("entering");
 	if ((r = sshbuf_get_cstring(e->request, &provider, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(e->request, &pin, NULL)) != 0) {
 		error_fr(r, "parse");
 		goto send;
 	}
 	if (parse_key_constraints(e->request, NULL, &death, &seconds, &confirm,
 	    NULL, &dest_constraints, &ndest_constraints, &cert_only,
 	    &ncerts, &certs) != 0) {
 		error_f("failed to parse constraints");
 		goto send;
 	}
 	dump_dest_constraints(__func__, dest_constraints, ndest_constraints);
 	if (socket_is_remote(e) && !remote_add_provider) {
 		verbose("failed PKCS#11 add of \"%.100s\": remote addition of "
 		    "providers is disabled", provider);
 		goto send;
 	}
 	if (realpath(provider, canonical_provider) == NULL) {
 		verbose("failed PKCS#11 add of \"%.100s\": realpath: %s",
 		    provider, strerror(errno));
 		goto send;
 	}
 	if (match_pattern_list(canonical_provider, allowed_providers, 0) != 1) {
 		verbose("refusing PKCS#11 add of \"%.100s\": "
 		    "provider not allowed", canonical_provider);
 		goto send;
 	}
 	debug_f("add %.100s", canonical_provider);
 	if (lifetime && !death)
 		death = monotime() + lifetime;
 
 	count = pkcs11_add_provider(canonical_provider, pin, &keys, &comments);
 	for (i = 0; i < count; i++) {
 		if (comments[i] == NULL || comments[i][0] == '\0') {
 			free(comments[i]);
 			comments[i] = xstrdup(canonical_provider);
 		}
 		for (j = 0; j < ncerts; j++) {
 			if (!sshkey_is_cert(certs[j]))
 				continue;
 			if (!sshkey_equal_public(keys[i], certs[j]))
 				continue;
 			if (pkcs11_make_cert(keys[i], certs[j], &k) != 0)
 				continue;
 			add_p11_identity(k, xstrdup(comments[i]),
 			    canonical_provider, death, confirm,
 			    dest_constraints, ndest_constraints);
 			success = 1;
 		}
 		if (!cert_only && lookup_identity(keys[i]) == NULL) {
 			add_p11_identity(keys[i], comments[i],
 			    canonical_provider, death, confirm,
 			    dest_constraints, ndest_constraints);
 			keys[i] = NULL;		/* transferred */
 			comments[i] = NULL;	/* transferred */
 			success = 1;
 		}
 		/* XXX update constraints for existing keys */
 		sshkey_free(keys[i]);
 		free(comments[i]);
 	}
 send:
 	free(pin);
 	free(provider);
 	free(keys);
 	free(comments);
 	free_dest_constraints(dest_constraints, ndest_constraints);
 	for (j = 0; j < ncerts; j++)
 		sshkey_free(certs[j]);
 	free(certs);
 	send_status(e, success);
 }
 
 static void
 process_remove_smartcard_key(SocketEntry *e)
 {
 	char *provider = NULL, *pin = NULL, canonical_provider[PATH_MAX];
 	int r, success = 0;
 	Identity *id, *nxt;
 
 	debug2_f("entering");
 	if ((r = sshbuf_get_cstring(e->request, &provider, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(e->request, &pin, NULL)) != 0) {
 		error_fr(r, "parse");
 		goto send;
 	}
 	free(pin);
 
 	if (realpath(provider, canonical_provider) == NULL) {
 		verbose("failed PKCS#11 add of \"%.100s\": realpath: %s",
 		    provider, strerror(errno));
 		goto send;
 	}
 
 	debug_f("remove %.100s", canonical_provider);
 	for (id = TAILQ_FIRST(&idtab->idlist); id; id = nxt) {
 		nxt = TAILQ_NEXT(id, next);
 		/* Skip file--based keys */
 		if (id->provider == NULL)
 			continue;
 		if (!strcmp(canonical_provider, id->provider)) {
 			TAILQ_REMOVE(&idtab->idlist, id, next);
 			free_identity(id);
 			idtab->nentries--;
 		}
 	}
 	if (pkcs11_del_provider(canonical_provider) == 0)
 		success = 1;
 	else
 		error_f("pkcs11_del_provider failed");
 send:
 	free(provider);
 	send_status(e, success);
 }
 #endif /* ENABLE_PKCS11 */
 
 static int
 process_ext_session_bind(SocketEntry *e)
 {
 	int r, sid_match, key_match;
 	struct sshkey *key = NULL;
 	struct sshbuf *sid = NULL, *sig = NULL;
 	char *fp = NULL;
 	size_t i;
 	u_char fwd = 0;
 
 	debug2_f("entering");
 	e->session_bind_attempted = 1;
 	if ((r = sshkey_froms(e->request, &key)) != 0 ||
 	    (r = sshbuf_froms(e->request, &sid)) != 0 ||
 	    (r = sshbuf_froms(e->request, &sig)) != 0 ||
 	    (r = sshbuf_get_u8(e->request, &fwd)) != 0) {
 		error_fr(r, "parse");
 		goto out;
 	}
 	if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
 	    SSH_FP_DEFAULT)) == NULL)
 		fatal_f("fingerprint failed");
 	/* check signature with hostkey on session ID */
 	if ((r = sshkey_verify(key, sshbuf_ptr(sig), sshbuf_len(sig),
 	    sshbuf_ptr(sid), sshbuf_len(sid), NULL, 0, NULL)) != 0) {
 		error_fr(r, "sshkey_verify for %s %s", sshkey_type(key), fp);
 		goto out;
 	}
 	/* check whether sid/key already recorded */
 	for (i = 0; i < e->nsession_ids; i++) {
 		if (!e->session_ids[i].forwarded) {
 			error_f("attempt to bind session ID to socket "
 			    "previously bound for authentication attempt");
 			r = -1;
 			goto out;
 		}
 		sid_match = buf_equal(sid, e->session_ids[i].sid) == 0;
 		key_match = sshkey_equal(key, e->session_ids[i].key);
 		if (sid_match && key_match) {
 			debug_f("session ID already recorded for %s %s",
 			    sshkey_type(key), fp);
 			r = 0;
 			goto out;
 		} else if (sid_match) {
 			error_f("session ID recorded against different key "
 			    "for %s %s", sshkey_type(key), fp);
 			r = -1;
 			goto out;
 		}
 		/*
 		 * new sid with previously-seen key can happen, e.g. multiple
 		 * connections to the same host.
 		 */
 	}
 	/* record new key/sid */
 	if (e->nsession_ids >= AGENT_MAX_SESSION_IDS) {
 		error_f("too many session IDs recorded");
 		goto out;
 	}
 	e->session_ids = xrecallocarray(e->session_ids, e->nsession_ids,
 	    e->nsession_ids + 1, sizeof(*e->session_ids));
 	i = e->nsession_ids++;
 	debug_f("recorded %s %s (slot %zu of %d)", sshkey_type(key), fp, i,
 	    AGENT_MAX_SESSION_IDS);
 	e->session_ids[i].key = key;
 	e->session_ids[i].forwarded = fwd != 0;
 	key = NULL; /* transferred */
 	/* can't transfer sid; it's refcounted and scoped to request's life */
 	if ((e->session_ids[i].sid = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new");
 	if ((r = sshbuf_putb(e->session_ids[i].sid, sid)) != 0)
 		fatal_fr(r, "sshbuf_putb session ID");
 	/* success */
 	r = 0;
  out:
 	free(fp);
 	sshkey_free(key);
 	sshbuf_free(sid);
 	sshbuf_free(sig);
 	return r == 0 ? 1 : 0;
 }
 
 static void
 process_extension(SocketEntry *e)
 {
 	int r, success = 0;
 	char *name;
 
 	debug2_f("entering");
 	if ((r = sshbuf_get_cstring(e->request, &name, NULL)) != 0) {
 		error_fr(r, "parse");
 		goto send;
 	}
 	if (strcmp(name, "session-bind@openssh.com") == 0)
 		success = process_ext_session_bind(e);
 	else
 		debug_f("unsupported extension \"%s\"", name);
 	free(name);
 send:
 	send_status(e, success);
 }
 /*
  * dispatch incoming message.
  * returns 1 on success, 0 for incomplete messages or -1 on error.
  */
 static int
 process_message(u_int socknum)
 {
 	u_int msg_len;
 	u_char type;
 	const u_char *cp;
 	int r;
 	SocketEntry *e;
 
 	if (socknum >= sockets_alloc)
 		fatal_f("sock %u >= allocated %u", socknum, sockets_alloc);
 	e = &sockets[socknum];
 
 	if (sshbuf_len(e->input) < 5)
 		return 0;		/* Incomplete message header. */
 	cp = sshbuf_ptr(e->input);
 	msg_len = PEEK_U32(cp);
 	if (msg_len > AGENT_MAX_LEN) {
 		debug_f("socket %u (fd=%d) message too long %u > %u",
 		    socknum, e->fd, msg_len, AGENT_MAX_LEN);
 		return -1;
 	}
 	if (sshbuf_len(e->input) < msg_len + 4)
 		return 0;		/* Incomplete message body. */
 
 	/* move the current input to e->request */
 	sshbuf_reset(e->request);
 	if ((r = sshbuf_get_stringb(e->input, e->request)) != 0 ||
 	    (r = sshbuf_get_u8(e->request, &type)) != 0) {
 		if (r == SSH_ERR_MESSAGE_INCOMPLETE ||
 		    r == SSH_ERR_STRING_TOO_LARGE) {
 			error_fr(r, "parse");
 			return -1;
 		}
 		fatal_fr(r, "parse");
 	}
 
 	debug_f("socket %u (fd=%d) type %d", socknum, e->fd, type);
 
 	/* check whether agent is locked */
 	if (locked && type != SSH_AGENTC_UNLOCK) {
 		sshbuf_reset(e->request);
 		switch (type) {
 		case SSH2_AGENTC_REQUEST_IDENTITIES:
 			/* send empty lists */
 			no_identities(e);
 			break;
 		default:
 			/* send a fail message for all other request types */
 			send_status(e, 0);
 		}
 		return 1;
 	}
 
 	switch (type) {
 	case SSH_AGENTC_LOCK:
 	case SSH_AGENTC_UNLOCK:
 		process_lock_agent(e, type == SSH_AGENTC_LOCK);
 		break;
 	case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES:
 		process_remove_all_identities(e); /* safe for !WITH_SSH1 */
 		break;
 	/* ssh2 */
 	case SSH2_AGENTC_SIGN_REQUEST:
 		process_sign_request2(e);
 		break;
 	case SSH2_AGENTC_REQUEST_IDENTITIES:
 		process_request_identities(e);
 		break;
 	case SSH2_AGENTC_ADD_IDENTITY:
 	case SSH2_AGENTC_ADD_ID_CONSTRAINED:
 		process_add_identity(e);
 		break;
 	case SSH2_AGENTC_REMOVE_IDENTITY:
 		process_remove_identity(e);
 		break;
 	case SSH2_AGENTC_REMOVE_ALL_IDENTITIES:
 		process_remove_all_identities(e);
 		break;
 #ifdef ENABLE_PKCS11
 	case SSH_AGENTC_ADD_SMARTCARD_KEY:
 	case SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED:
 		process_add_smartcard_key(e);
 		break;
 	case SSH_AGENTC_REMOVE_SMARTCARD_KEY:
 		process_remove_smartcard_key(e);
 		break;
 #endif /* ENABLE_PKCS11 */
 	case SSH_AGENTC_EXTENSION:
 		process_extension(e);
 		break;
 	default:
 		/* Unknown message.  Respond with failure. */
 		error("Unknown message %d", type);
 		sshbuf_reset(e->request);
 		send_status(e, 0);
 		break;
 	}
 	return 1;
 }
 
 static void
 new_socket(sock_type type, int fd)
 {
 	u_int i, old_alloc, new_alloc;
 
 	debug_f("type = %s", type == AUTH_CONNECTION ? "CONNECTION" :
 	    (type == AUTH_SOCKET ? "SOCKET" : "UNKNOWN"));
 	set_nonblock(fd);
 
 	if (fd > max_fd)
 		max_fd = fd;
 
 	for (i = 0; i < sockets_alloc; i++)
 		if (sockets[i].type == AUTH_UNUSED) {
 			sockets[i].fd = fd;
 			if ((sockets[i].input = sshbuf_new()) == NULL ||
 			    (sockets[i].output = sshbuf_new()) == NULL ||
 			    (sockets[i].request = sshbuf_new()) == NULL)
 				fatal_f("sshbuf_new failed");
 			sockets[i].type = type;
 			return;
 		}
 	old_alloc = sockets_alloc;
 	new_alloc = sockets_alloc + 10;
 	sockets = xrecallocarray(sockets, old_alloc, new_alloc,
 	    sizeof(sockets[0]));
 	for (i = old_alloc; i < new_alloc; i++)
 		sockets[i].type = AUTH_UNUSED;
 	sockets_alloc = new_alloc;
 	sockets[old_alloc].fd = fd;
 	if ((sockets[old_alloc].input = sshbuf_new()) == NULL ||
 	    (sockets[old_alloc].output = sshbuf_new()) == NULL ||
 	    (sockets[old_alloc].request = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	sockets[old_alloc].type = type;
 }
 
 static int
 handle_socket_read(u_int socknum)
 {
 	struct sockaddr_un sunaddr;
 	socklen_t slen;
 	uid_t euid;
 	gid_t egid;
 	int fd;
 
 	slen = sizeof(sunaddr);
 	fd = accept(sockets[socknum].fd, (struct sockaddr *)&sunaddr, &slen);
 	if (fd == -1) {
 		error("accept from AUTH_SOCKET: %s", strerror(errno));
 		return -1;
 	}
 	if (getpeereid(fd, &euid, &egid) == -1) {
 		error("getpeereid %d failed: %s", fd, strerror(errno));
 		close(fd);
 		return -1;
 	}
 	if ((euid != 0) && (getuid() != euid)) {
 		error("uid mismatch: peer euid %u != uid %u",
 		    (u_int) euid, (u_int) getuid());
 		close(fd);
 		return -1;
 	}
 	new_socket(AUTH_CONNECTION, fd);
 	return 0;
 }
 
 static int
 handle_conn_read(u_int socknum)
 {
 	char buf[AGENT_RBUF_LEN];
 	ssize_t len;
 	int r;
 
 	if ((len = read(sockets[socknum].fd, buf, sizeof(buf))) <= 0) {
 		if (len == -1) {
 			if (errno == EAGAIN || errno == EINTR)
 				return 0;
 			error_f("read error on socket %u (fd %d): %s",
 			    socknum, sockets[socknum].fd, strerror(errno));
 		}
 		return -1;
 	}
 	if ((r = sshbuf_put(sockets[socknum].input, buf, len)) != 0)
 		fatal_fr(r, "compose");
 	explicit_bzero(buf, sizeof(buf));
 	for (;;) {
 		if ((r = process_message(socknum)) == -1)
 			return -1;
 		else if (r == 0)
 			break;
 	}
 	return 0;
 }
 
 static int
 handle_conn_write(u_int socknum)
 {
 	ssize_t len;
 	int r;
 
 	if (sshbuf_len(sockets[socknum].output) == 0)
 		return 0; /* shouldn't happen */
 	if ((len = write(sockets[socknum].fd,
 	    sshbuf_ptr(sockets[socknum].output),
 	    sshbuf_len(sockets[socknum].output))) <= 0) {
 		if (len == -1) {
 			if (errno == EAGAIN || errno == EINTR)
 				return 0;
 			error_f("read error on socket %u (fd %d): %s",
 			    socknum, sockets[socknum].fd, strerror(errno));
 		}
 		return -1;
 	}
 	if ((r = sshbuf_consume(sockets[socknum].output, len)) != 0)
 		fatal_fr(r, "consume");
 	return 0;
 }
 
 static void
 after_poll(struct pollfd *pfd, size_t npfd, u_int maxfds)
 {
 	size_t i;
 	u_int socknum, activefds = npfd;
 
 	for (i = 0; i < npfd; i++) {
 		if (pfd[i].revents == 0)
 			continue;
 		/* Find sockets entry */
 		for (socknum = 0; socknum < sockets_alloc; socknum++) {
 			if (sockets[socknum].type != AUTH_SOCKET &&
 			    sockets[socknum].type != AUTH_CONNECTION)
 				continue;
 			if (pfd[i].fd == sockets[socknum].fd)
 				break;
 		}
 		if (socknum >= sockets_alloc) {
 			error_f("no socket for fd %d", pfd[i].fd);
 			continue;
 		}
 		/* Process events */
 		switch (sockets[socknum].type) {
 		case AUTH_SOCKET:
 			if ((pfd[i].revents & (POLLIN|POLLERR)) == 0)
 				break;
 			if (npfd > maxfds) {
 				debug3("out of fds (active %u >= limit %u); "
 				    "skipping accept", activefds, maxfds);
 				break;
 			}
 			if (handle_socket_read(socknum) == 0)
 				activefds++;
 			break;
 		case AUTH_CONNECTION:
 			if ((pfd[i].revents & (POLLIN|POLLHUP|POLLERR)) != 0 &&
 			    handle_conn_read(socknum) != 0)
 				goto close_sock;
 			if ((pfd[i].revents & (POLLOUT|POLLHUP)) != 0 &&
 			    handle_conn_write(socknum) != 0) {
  close_sock:
 				if (activefds == 0)
 					fatal("activefds == 0 at close_sock");
 				close_socket(&sockets[socknum]);
 				activefds--;
 				break;
 			}
 			break;
 		default:
 			break;
 		}
 	}
 }
 
 static int
-prepare_poll(struct pollfd **pfdp, size_t *npfdp, int *timeoutp, u_int maxfds)
+prepare_poll(struct pollfd **pfdp, size_t *npfdp, struct timespec *timeoutp, u_int maxfds)
 {
 	struct pollfd *pfd = *pfdp;
 	size_t i, j, npfd = 0;
 	time_t deadline;
 	int r;
 
 	/* Count active sockets */
 	for (i = 0; i < sockets_alloc; i++) {
 		switch (sockets[i].type) {
 		case AUTH_SOCKET:
 		case AUTH_CONNECTION:
 			npfd++;
 			break;
 		case AUTH_UNUSED:
 			break;
 		default:
 			fatal("Unknown socket type %d", sockets[i].type);
 			break;
 		}
 	}
 	if (npfd != *npfdp &&
 	    (pfd = recallocarray(pfd, *npfdp, npfd, sizeof(*pfd))) == NULL)
 		fatal_f("recallocarray failed");
 	*pfdp = pfd;
 	*npfdp = npfd;
 
 	for (i = j = 0; i < sockets_alloc; i++) {
 		switch (sockets[i].type) {
 		case AUTH_SOCKET:
 			if (npfd > maxfds) {
 				debug3("out of fds (active %zu >= limit %u); "
 				    "skipping arming listener", npfd, maxfds);
 				break;
 			}
 			pfd[j].fd = sockets[i].fd;
 			pfd[j].revents = 0;
 			pfd[j].events = POLLIN;
 			j++;
 			break;
 		case AUTH_CONNECTION:
 			pfd[j].fd = sockets[i].fd;
 			pfd[j].revents = 0;
 			/*
 			 * Only prepare to read if we can handle a full-size
 			 * input read buffer and enqueue a max size reply..
 			 */
 			if ((r = sshbuf_check_reserve(sockets[i].input,
 			    AGENT_RBUF_LEN)) == 0 &&
 			    (r = sshbuf_check_reserve(sockets[i].output,
 			    AGENT_MAX_LEN)) == 0)
 				pfd[j].events = POLLIN;
 			else if (r != SSH_ERR_NO_BUFFER_SPACE)
 				fatal_fr(r, "reserve");
 			if (sshbuf_len(sockets[i].output) > 0)
 				pfd[j].events |= POLLOUT;
 			j++;
 			break;
 		default:
 			break;
 		}
 	}
 	deadline = reaper();
 	if (parent_alive_interval != 0)
 		deadline = (deadline == 0) ? parent_alive_interval :
 		    MINIMUM(deadline, parent_alive_interval);
-	if (deadline == 0) {
-		*timeoutp = -1; /* INFTIM */
-	} else {
-		if (deadline > INT_MAX / 1000)
-			*timeoutp = INT_MAX / 1000;
-		else
-			*timeoutp = deadline * 1000;
-	}
+	if (deadline != 0)
+		ptimeout_deadline_sec(timeoutp, deadline);
 	return (1);
 }
 
 static void
 cleanup_socket(void)
 {
 	if (cleanup_pid != 0 && getpid() != cleanup_pid)
 		return;
 	debug_f("cleanup");
 	if (socket_name[0])
 		unlink(socket_name);
 	if (socket_dir[0])
 		rmdir(socket_dir);
 }
 
 void
 cleanup_exit(int i)
 {
 	cleanup_socket();
+#ifdef ENABLE_PKCS11
+	pkcs11_terminate();
+#endif
 	_exit(i);
 }
 
 static void
 cleanup_handler(int sig)
 {
-	cleanup_socket();
-#ifdef ENABLE_PKCS11
-	pkcs11_terminate();
-#endif
-	_exit(2);
+	signalled = sig;
 }
 
 static void
 check_parent_exists(void)
 {
 	/*
 	 * If our parent has exited then getppid() will return (pid_t)1,
 	 * so testing for that should be safe.
 	 */
 	if (parent_pid != -1 && getppid() != parent_pid) {
 		/* printf("Parent has died - Authentication agent exiting.\n"); */
 		cleanup_socket();
 		_exit(2);
 	}
 }
 
 static void
 usage(void)
 {
 	fprintf(stderr,
 	    "usage: ssh-agent [-c | -s] [-Dd] [-a bind_address] [-E fingerprint_hash]\n"
 	    "                 [-O option] [-P allowed_providers] [-t life]\n"
 	    "       ssh-agent [-a bind_address] [-E fingerprint_hash] [-O option]\n"
 	    "                 [-P allowed_providers] [-t life] command [arg ...]\n"
 	    "       ssh-agent [-c | -s] -k\n");
 	exit(1);
 }
 
 int
 main(int ac, char **av)
 {
 	int c_flag = 0, d_flag = 0, D_flag = 0, k_flag = 0, s_flag = 0;
 	int sock, ch, result, saved_errno;
 	char *shell, *format, *pidstr, *agentsocket = NULL;
 #ifdef HAVE_SETRLIMIT
 	struct rlimit rlim;
 #endif
 	extern int optind;
 	extern char *optarg;
 	pid_t pid;
 	char pidstrbuf[1 + 3 * sizeof pid];
 	size_t len;
 	mode_t prev_mask;
-	int timeout = -1; /* INFTIM */
+	struct timespec timeout;
 	struct pollfd *pfd = NULL;
 	size_t npfd = 0;
 	u_int maxfds;
+	sigset_t nsigset, osigset;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	/* drop */
 	(void)setegid(getgid());
 	(void)setgid(getgid());
 
 	platform_disable_tracing(0);	/* strict=no */
 
 #ifdef RLIMIT_NOFILE
 	if (getrlimit(RLIMIT_NOFILE, &rlim) == -1)
 		fatal("%s: getrlimit: %s", __progname, strerror(errno));
 #endif
 
 	__progname = ssh_get_progname(av[0]);
 	seed_rng();
 
 	while ((ch = getopt(ac, av, "cDdksE:a:O:P:t:")) != -1) {
 		switch (ch) {
 		case 'E':
 			fingerprint_hash = ssh_digest_alg_by_name(optarg);
 			if (fingerprint_hash == -1)
 				fatal("Invalid hash algorithm \"%s\"", optarg);
 			break;
 		case 'c':
 			if (s_flag)
 				usage();
 			c_flag++;
 			break;
 		case 'k':
 			k_flag++;
 			break;
 		case 'O':
 			if (strcmp(optarg, "no-restrict-websafe") == 0)
 				restrict_websafe = 0;
 			else if (strcmp(optarg, "allow-remote-pkcs11") == 0)
 				remote_add_provider = 1;
 			else
 				fatal("Unknown -O option");
 			break;
 		case 'P':
 			if (allowed_providers != NULL)
 				fatal("-P option already specified");
 			allowed_providers = xstrdup(optarg);
 			break;
 		case 's':
 			if (c_flag)
 				usage();
 			s_flag++;
 			break;
 		case 'd':
 			if (d_flag || D_flag)
 				usage();
 			d_flag++;
 			break;
 		case 'D':
 			if (d_flag || D_flag)
 				usage();
 			D_flag++;
 			break;
 		case 'a':
 			agentsocket = optarg;
 			break;
 		case 't':
 			if ((lifetime = convtime(optarg)) == -1) {
 				fprintf(stderr, "Invalid lifetime\n");
 				usage();
 			}
 			break;
 		default:
 			usage();
 		}
 	}
 	ac -= optind;
 	av += optind;
 
 	if (ac > 0 && (c_flag || k_flag || s_flag || d_flag || D_flag))
 		usage();
 
 	if (allowed_providers == NULL)
 		allowed_providers = xstrdup(DEFAULT_ALLOWED_PROVIDERS);
 
 	if (ac == 0 && !c_flag && !s_flag) {
 		shell = getenv("SHELL");
 		if (shell != NULL && (len = strlen(shell)) > 2 &&
 		    strncmp(shell + len - 3, "csh", 3) == 0)
 			c_flag = 1;
 	}
 	if (k_flag) {
 		const char *errstr = NULL;
 
 		pidstr = getenv(SSH_AGENTPID_ENV_NAME);
 		if (pidstr == NULL) {
 			fprintf(stderr, "%s not set, cannot kill agent\n",
 			    SSH_AGENTPID_ENV_NAME);
 			exit(1);
 		}
 		pid = (int)strtonum(pidstr, 2, INT_MAX, &errstr);
 		if (errstr) {
 			fprintf(stderr,
 			    "%s=\"%s\", which is not a good PID: %s\n",
 			    SSH_AGENTPID_ENV_NAME, pidstr, errstr);
 			exit(1);
 		}
 		if (kill(pid, SIGTERM) == -1) {
 			perror("kill");
 			exit(1);
 		}
 		format = c_flag ? "unsetenv %s;\n" : "unset %s;\n";
 		printf(format, SSH_AUTHSOCKET_ENV_NAME);
 		printf(format, SSH_AGENTPID_ENV_NAME);
 		printf("echo Agent pid %ld killed;\n", (long)pid);
 		exit(0);
 	}
 
 	/*
 	 * Minimum file descriptors:
 	 * stdio (3) + listener (1) + syslog (1 maybe) + connection (1) +
 	 * a few spare for libc / stack protectors / sanitisers, etc.
 	 */
 #define SSH_AGENT_MIN_FDS (3+1+1+1+4)
 	if (rlim.rlim_cur < SSH_AGENT_MIN_FDS)
 		fatal("%s: file descriptor rlimit %lld too low (minimum %u)",
 		    __progname, (long long)rlim.rlim_cur, SSH_AGENT_MIN_FDS);
 	maxfds = rlim.rlim_cur - SSH_AGENT_MIN_FDS;
 
 	parent_pid = getpid();
 
 	if (agentsocket == NULL) {
 		/* Create private directory for agent socket */
 		mktemp_proto(socket_dir, sizeof(socket_dir));
 		if (mkdtemp(socket_dir) == NULL) {
 			perror("mkdtemp: private socket dir");
 			exit(1);
 		}
 		snprintf(socket_name, sizeof socket_name, "%s/agent.%ld", socket_dir,
 		    (long)parent_pid);
 	} else {
 		/* Try to use specified agent socket */
 		socket_dir[0] = '\0';
 		strlcpy(socket_name, agentsocket, sizeof socket_name);
 	}
 
 	/*
 	 * Create socket early so it will exist before command gets run from
 	 * the parent.
 	 */
 	prev_mask = umask(0177);
 	sock = unix_listener(socket_name, SSH_LISTEN_BACKLOG, 0);
 	if (sock < 0) {
 		/* XXX - unix_listener() calls error() not perror() */
 		*socket_name = '\0'; /* Don't unlink any existing file */
 		cleanup_exit(1);
 	}
 	umask(prev_mask);
 
 	/*
 	 * Fork, and have the parent execute the command, if any, or present
 	 * the socket data.  The child continues as the authentication agent.
 	 */
 	if (D_flag || d_flag) {
 		log_init(__progname,
 		    d_flag ? SYSLOG_LEVEL_DEBUG3 : SYSLOG_LEVEL_INFO,
 		    SYSLOG_FACILITY_AUTH, 1);
 		format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n";
 		printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name,
 		    SSH_AUTHSOCKET_ENV_NAME);
 		printf("echo Agent pid %ld;\n", (long)parent_pid);
 		fflush(stdout);
 		goto skip;
 	}
 	pid = fork();
 	if (pid == -1) {
 		perror("fork");
 		cleanup_exit(1);
 	}
 	if (pid != 0) {		/* Parent - execute the given command. */
 		close(sock);
 		snprintf(pidstrbuf, sizeof pidstrbuf, "%ld", (long)pid);
 		if (ac == 0) {
 			format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n";
 			printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name,
 			    SSH_AUTHSOCKET_ENV_NAME);
 			printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf,
 			    SSH_AGENTPID_ENV_NAME);
 			printf("echo Agent pid %ld;\n", (long)pid);
 			exit(0);
 		}
 		if (setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1) == -1 ||
 		    setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1) == -1) {
 			perror("setenv");
 			exit(1);
 		}
 		execvp(av[0], av);
 		perror(av[0]);
 		exit(1);
 	}
 	/* child */
 	log_init(__progname, SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_AUTH, 0);
 
 	if (setsid() == -1) {
 		error("setsid: %s", strerror(errno));
 		cleanup_exit(1);
 	}
 
 	(void)chdir("/");
 	if (stdfd_devnull(1, 1, 1) == -1)
 		error_f("stdfd_devnull failed");
 
 #ifdef HAVE_SETRLIMIT
 	/* deny core dumps, since memory contains unencrypted private keys */
 	rlim.rlim_cur = rlim.rlim_max = 0;
 	if (setrlimit(RLIMIT_CORE, &rlim) == -1) {
 		error("setrlimit RLIMIT_CORE: %s", strerror(errno));
 		cleanup_exit(1);
 	}
 #endif
 
 skip:
 
 	cleanup_pid = getpid();
 
 #ifdef ENABLE_PKCS11
 	pkcs11_init(0);
 #endif
 	new_socket(AUTH_SOCKET, sock);
 	if (ac > 0)
 		parent_alive_interval = 10;
 	idtab_init();
 	ssh_signal(SIGPIPE, SIG_IGN);
 	ssh_signal(SIGINT, (d_flag | D_flag) ? cleanup_handler : SIG_IGN);
 	ssh_signal(SIGHUP, cleanup_handler);
 	ssh_signal(SIGTERM, cleanup_handler);
 
+	sigemptyset(&nsigset);
+	sigaddset(&nsigset, SIGINT);
+	sigaddset(&nsigset, SIGHUP);
+	sigaddset(&nsigset, SIGTERM);
+
 	if (pledge("stdio rpath cpath unix id proc exec", NULL) == -1)
 		fatal("%s: pledge: %s", __progname, strerror(errno));
 	platform_pledge_agent();
 
 	while (1) {
+		sigprocmask(SIG_BLOCK, &nsigset, &osigset);
+		if (signalled != 0) {
+			logit("exiting on signal %d", (int)signalled);
+			cleanup_exit(2);
+		}
+		ptimeout_init(&timeout);
 		prepare_poll(&pfd, &npfd, &timeout, maxfds);
-		result = poll(pfd, npfd, timeout);
+		result = ppoll(pfd, npfd, ptimeout_get_tsp(&timeout), &osigset);
+		sigprocmask(SIG_SETMASK, &osigset, NULL);
 		saved_errno = errno;
 		if (parent_alive_interval != 0)
 			check_parent_exists();
 		(void) reaper();	/* remove expired keys */
 		if (result == -1) {
 			if (saved_errno == EINTR)
 				continue;
 			fatal("poll: %s", strerror(saved_errno));
 		} else if (result > 0)
 			after_poll(pfd, npfd, maxfds);
 	}
 	/* NOTREACHED */
 }
diff --git a/ssh-dss.c b/ssh-dss.c
index 3174ef146dc3..aea661377f5c 100644
--- a/ssh-dss.c
+++ b/ssh-dss.c
@@ -1,456 +1,457 @@
-/* $OpenBSD: ssh-dss.c,v 1.49 2023/03/05 05:34:09 dtucker Exp $ */
+/* $OpenBSD: ssh-dss.c,v 1.50 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
-#ifdef WITH_OPENSSL
+#if defined(WITH_OPENSSL) && defined(WITH_DSA)
 
 #include <sys/types.h>
 
 #include <openssl/bn.h>
 #include <openssl/dsa.h>
 #include <openssl/evp.h>
 
 #include <stdarg.h>
 #include <string.h>
 
 #include "sshbuf.h"
 #include "ssherr.h"
 #include "digest.h"
 #define SSHKEY_INTERNAL
 #include "sshkey.h"
 
 #include "openbsd-compat/openssl-compat.h"
 
 #define INTBLOB_LEN	20
 #define SIGBLOB_LEN	(2*INTBLOB_LEN)
 
 static u_int
 ssh_dss_size(const struct sshkey *key)
 {
 	const BIGNUM *dsa_p;
 
 	if (key->dsa == NULL)
 		return 0;
 	DSA_get0_pqg(key->dsa, &dsa_p, NULL, NULL);
 	return BN_num_bits(dsa_p);
 }
 
 static int
 ssh_dss_alloc(struct sshkey *k)
 {
 	if ((k->dsa = DSA_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	return 0;
 }
 
 static void
 ssh_dss_cleanup(struct sshkey *k)
 {
 	DSA_free(k->dsa);
 	k->dsa = NULL;
 }
 
 static int
 ssh_dss_equal(const struct sshkey *a, const struct sshkey *b)
 {
 	const BIGNUM *dsa_p_a, *dsa_q_a, *dsa_g_a, *dsa_pub_key_a;
 	const BIGNUM *dsa_p_b, *dsa_q_b, *dsa_g_b, *dsa_pub_key_b;
 
 	if (a->dsa == NULL || b->dsa == NULL)
 		return 0;
 	DSA_get0_pqg(a->dsa, &dsa_p_a, &dsa_q_a, &dsa_g_a);
 	DSA_get0_pqg(b->dsa, &dsa_p_b, &dsa_q_b, &dsa_g_b);
 	DSA_get0_key(a->dsa, &dsa_pub_key_a, NULL);
 	DSA_get0_key(b->dsa, &dsa_pub_key_b, NULL);
 	if (dsa_p_a == NULL || dsa_p_b == NULL ||
 	    dsa_q_a == NULL || dsa_q_b == NULL ||
 	    dsa_g_a == NULL || dsa_g_b == NULL ||
 	    dsa_pub_key_a == NULL || dsa_pub_key_b == NULL)
 		return 0;
 	if (BN_cmp(dsa_p_a, dsa_p_b) != 0)
 		return 0;
 	if (BN_cmp(dsa_q_a, dsa_q_b) != 0)
 		return 0;
 	if (BN_cmp(dsa_g_a, dsa_g_b) != 0)
 		return 0;
 	if (BN_cmp(dsa_pub_key_a, dsa_pub_key_b) != 0)
 		return 0;
 	return 1;
 }
 
 static int
 ssh_dss_serialize_public(const struct sshkey *key, struct sshbuf *b,
     enum sshkey_serialize_rep opts)
 {
 	int r;
 	const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
 
 	if (key->dsa == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
 	DSA_get0_key(key->dsa, &dsa_pub_key, NULL);
 	if (dsa_p == NULL || dsa_q == NULL ||
 	    dsa_g == NULL || dsa_pub_key == NULL)
 		return SSH_ERR_INTERNAL_ERROR;
 	if ((r = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
 	    (r = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
 	    (r = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
 	    (r = sshbuf_put_bignum2(b, dsa_pub_key)) != 0)
 		return r;
 
 	return 0;
 }
 
 static int
 ssh_dss_serialize_private(const struct sshkey *key, struct sshbuf *b,
     enum sshkey_serialize_rep opts)
 {
 	int r;
 	const BIGNUM *dsa_priv_key;
 
 	DSA_get0_key(key->dsa, NULL, &dsa_priv_key);
 	if (!sshkey_is_cert(key)) {
 		if ((r = ssh_dss_serialize_public(key, b, opts)) != 0)
 			return r;
 	}
 	if ((r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
 		return r;
 
 	return 0;
 }
 
 static int
 ssh_dss_generate(struct sshkey *k, int bits)
 {
 	DSA *private;
 
 	if (bits != 1024)
 		return SSH_ERR_KEY_LENGTH;
 	if ((private = DSA_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if (!DSA_generate_parameters_ex(private, bits, NULL, 0, NULL,
 	    NULL, NULL) || !DSA_generate_key(private)) {
 		DSA_free(private);
 		return SSH_ERR_LIBCRYPTO_ERROR;
 	}
 	k->dsa = private;
 	return 0;
 }
 
 static int
 ssh_dss_copy_public(const struct sshkey *from, struct sshkey *to)
 {
 	const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
 	BIGNUM *dsa_p_dup = NULL, *dsa_q_dup = NULL, *dsa_g_dup = NULL;
 	BIGNUM *dsa_pub_key_dup = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	DSA_get0_pqg(from->dsa, &dsa_p, &dsa_q, &dsa_g);
 	DSA_get0_key(from->dsa, &dsa_pub_key, NULL);
 	if ((dsa_p_dup = BN_dup(dsa_p)) == NULL ||
 	    (dsa_q_dup = BN_dup(dsa_q)) == NULL ||
 	    (dsa_g_dup = BN_dup(dsa_g)) == NULL ||
 	    (dsa_pub_key_dup = BN_dup(dsa_pub_key)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (!DSA_set0_pqg(to->dsa, dsa_p_dup, dsa_q_dup, dsa_g_dup)) {
 		r = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	dsa_p_dup = dsa_q_dup = dsa_g_dup = NULL; /* transferred */
 	if (!DSA_set0_key(to->dsa, dsa_pub_key_dup, NULL)) {
 		r = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	dsa_pub_key_dup = NULL; /* transferred */
 	/* success */
 	r = 0;
  out:
 	BN_clear_free(dsa_p_dup);
 	BN_clear_free(dsa_q_dup);
 	BN_clear_free(dsa_g_dup);
 	BN_clear_free(dsa_pub_key_dup);
 	return r;
 }
 
 static int
 ssh_dss_deserialize_public(const char *ktype, struct sshbuf *b,
     struct sshkey *key)
 {
 	int ret = SSH_ERR_INTERNAL_ERROR;
 	BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL, *dsa_pub_key = NULL;
 
 	if (sshbuf_get_bignum2(b, &dsa_p) != 0 ||
 	    sshbuf_get_bignum2(b, &dsa_q) != 0 ||
 	    sshbuf_get_bignum2(b, &dsa_g) != 0 ||
 	    sshbuf_get_bignum2(b, &dsa_pub_key) != 0) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	dsa_p = dsa_q = dsa_g = NULL; /* transferred */
 	if (!DSA_set0_key(key->dsa, dsa_pub_key, NULL)) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	dsa_pub_key = NULL; /* transferred */
 #ifdef DEBUG_PK
 	DSA_print_fp(stderr, key->dsa, 8);
 #endif
 	/* success */
 	ret = 0;
  out:
 	BN_clear_free(dsa_p);
 	BN_clear_free(dsa_q);
 	BN_clear_free(dsa_g);
 	BN_clear_free(dsa_pub_key);
 	return ret;
 }
 
 static int
 ssh_dss_deserialize_private(const char *ktype, struct sshbuf *b,
     struct sshkey *key)
 {
 	int r;
 	BIGNUM *dsa_priv_key = NULL;
 
 	if (!sshkey_is_cert(key)) {
 		if ((r = ssh_dss_deserialize_public(ktype, b, key)) != 0)
 			return r;
 	}
 
 	if ((r = sshbuf_get_bignum2(b, &dsa_priv_key)) != 0)
 		return r;
 	if (!DSA_set0_key(key->dsa, NULL, dsa_priv_key)) {
 		BN_clear_free(dsa_priv_key);
 		return SSH_ERR_LIBCRYPTO_ERROR;
 	}
 	return 0;
 }
 
 static int
 ssh_dss_sign(struct sshkey *key,
     u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen,
     const char *alg, const char *sk_provider, const char *sk_pin, u_int compat)
 {
 	DSA_SIG *sig = NULL;
 	const BIGNUM *sig_r, *sig_s;
 	u_char digest[SSH_DIGEST_MAX_LENGTH], sigblob[SIGBLOB_LEN];
 	size_t rlen, slen, len, dlen = ssh_digest_bytes(SSH_DIGEST_SHA1);
 	struct sshbuf *b = NULL;
 	int ret = SSH_ERR_INVALID_ARGUMENT;
 
 	if (lenp != NULL)
 		*lenp = 0;
 	if (sigp != NULL)
 		*sigp = NULL;
 
 	if (key == NULL || key->dsa == NULL ||
 	    sshkey_type_plain(key->type) != KEY_DSA)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (dlen == 0)
 		return SSH_ERR_INTERNAL_ERROR;
 
 	if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen,
 	    digest, sizeof(digest))) != 0)
 		goto out;
 
 	if ((sig = DSA_do_sign(digest, dlen, key->dsa)) == NULL) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 
 	DSA_SIG_get0(sig, &sig_r, &sig_s);
 	rlen = BN_num_bytes(sig_r);
 	slen = BN_num_bytes(sig_s);
 	if (rlen > INTBLOB_LEN || slen > INTBLOB_LEN) {
 		ret = SSH_ERR_INTERNAL_ERROR;
 		goto out;
 	}
 	explicit_bzero(sigblob, SIGBLOB_LEN);
 	BN_bn2bin(sig_r, sigblob + SIGBLOB_LEN - INTBLOB_LEN - rlen);
 	BN_bn2bin(sig_s, sigblob + SIGBLOB_LEN - slen);
 
 	if ((b = sshbuf_new()) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((ret = sshbuf_put_cstring(b, "ssh-dss")) != 0 ||
 	    (ret = sshbuf_put_string(b, sigblob, SIGBLOB_LEN)) != 0)
 		goto out;
 
 	len = sshbuf_len(b);
 	if (sigp != NULL) {
 		if ((*sigp = malloc(len)) == NULL) {
 			ret = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		memcpy(*sigp, sshbuf_ptr(b), len);
 	}
 	if (lenp != NULL)
 		*lenp = len;
 	ret = 0;
  out:
 	explicit_bzero(digest, sizeof(digest));
 	DSA_SIG_free(sig);
 	sshbuf_free(b);
 	return ret;
 }
 
 static int
 ssh_dss_verify(const struct sshkey *key,
     const u_char *sig, size_t siglen,
     const u_char *data, size_t dlen, const char *alg, u_int compat,
     struct sshkey_sig_details **detailsp)
 {
 	DSA_SIG *dsig = NULL;
 	BIGNUM *sig_r = NULL, *sig_s = NULL;
 	u_char digest[SSH_DIGEST_MAX_LENGTH], *sigblob = NULL;
 	size_t len, hlen = ssh_digest_bytes(SSH_DIGEST_SHA1);
 	int ret = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *b = NULL;
 	char *ktype = NULL;
 
 	if (key == NULL || key->dsa == NULL ||
 	    sshkey_type_plain(key->type) != KEY_DSA ||
 	    sig == NULL || siglen == 0)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (hlen == 0)
 		return SSH_ERR_INTERNAL_ERROR;
 
 	/* fetch signature */
 	if ((b = sshbuf_from(sig, siglen)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if (sshbuf_get_cstring(b, &ktype, NULL) != 0 ||
 	    sshbuf_get_string(b, &sigblob, &len) != 0) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if (strcmp("ssh-dss", ktype) != 0) {
 		ret = SSH_ERR_KEY_TYPE_MISMATCH;
 		goto out;
 	}
 	if (sshbuf_len(b) != 0) {
 		ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
 		goto out;
 	}
 
 	if (len != SIGBLOB_LEN) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* parse signature */
 	if ((dsig = DSA_SIG_new()) == NULL ||
 	    (sig_r = BN_new()) == NULL ||
 	    (sig_s = BN_new()) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((BN_bin2bn(sigblob, INTBLOB_LEN, sig_r) == NULL) ||
 	    (BN_bin2bn(sigblob + INTBLOB_LEN, INTBLOB_LEN, sig_s) == NULL)) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (!DSA_SIG_set0(dsig, sig_r, sig_s)) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	sig_r = sig_s = NULL; /* transferred */
 
 	/* sha1 the data */
 	if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, dlen,
 	    digest, sizeof(digest))) != 0)
 		goto out;
 
 	switch (DSA_do_verify(digest, hlen, dsig, key->dsa)) {
 	case 1:
 		ret = 0;
 		break;
 	case 0:
 		ret = SSH_ERR_SIGNATURE_INVALID;
 		goto out;
 	default:
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 
  out:
 	explicit_bzero(digest, sizeof(digest));
 	DSA_SIG_free(dsig);
 	BN_clear_free(sig_r);
 	BN_clear_free(sig_s);
 	sshbuf_free(b);
 	free(ktype);
 	if (sigblob != NULL)
 		freezero(sigblob, len);
 	return ret;
 }
 
 static const struct sshkey_impl_funcs sshkey_dss_funcs = {
 	/* .size = */		ssh_dss_size,
 	/* .alloc = */		ssh_dss_alloc,
 	/* .cleanup = */	ssh_dss_cleanup,
 	/* .equal = */		ssh_dss_equal,
 	/* .ssh_serialize_public = */ ssh_dss_serialize_public,
 	/* .ssh_deserialize_public = */ ssh_dss_deserialize_public,
 	/* .ssh_serialize_private = */ ssh_dss_serialize_private,
 	/* .ssh_deserialize_private = */ ssh_dss_deserialize_private,
 	/* .generate = */	ssh_dss_generate,
 	/* .copy_public = */	ssh_dss_copy_public,
 	/* .sign = */		ssh_dss_sign,
 	/* .verify = */		ssh_dss_verify,
 };
 
 const struct sshkey_impl sshkey_dss_impl = {
 	/* .name = */		"ssh-dss",
 	/* .shortname = */	"DSA",
 	/* .sigalg = */		NULL,
 	/* .type = */		KEY_DSA,
 	/* .nid = */		0,
 	/* .cert = */		0,
 	/* .sigonly = */	0,
 	/* .keybits = */	0,
 	/* .funcs = */		&sshkey_dss_funcs,
 };
 
 const struct sshkey_impl sshkey_dsa_cert_impl = {
 	/* .name = */		"ssh-dss-cert-v01@openssh.com",
 	/* .shortname = */	"DSA-CERT",
 	/* .sigalg = */		NULL,
 	/* .type = */		KEY_DSA_CERT,
 	/* .nid = */		0,
 	/* .cert = */		1,
 	/* .sigonly = */	0,
 	/* .keybits = */	0,
 	/* .funcs = */		&sshkey_dss_funcs,
 };
-#endif /* WITH_OPENSSL */
+
+#endif /* WITH_OPENSSL && WITH_DSA */
diff --git a/ssh-keygen.0 b/ssh-keygen.0
index 95e4aa364ad1..b0c22f7cc575 100644
--- a/ssh-keygen.0
+++ b/ssh-keygen.0
@@ -1,910 +1,910 @@
 SSH-KEYGEN(1)               General Commands Manual              SSH-KEYGEN(1)
 
 NAME
      ssh-keygen M-bM-^@M-^S OpenSSH authentication key utility
 
 SYNOPSIS
      ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]
                 [-m format] [-N new_passphrase] [-O option]
                 [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]
                 [-w provider] [-Z cipher]
      ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]
                 [-P old_passphrase] [-Z cipher]
      ssh-keygen -i [-f input_keyfile] [-m key_format]
      ssh-keygen -e [-f input_keyfile] [-m key_format]
      ssh-keygen -y [-f input_keyfile]
      ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]
      ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]
      ssh-keygen -B [-f input_keyfile]
      ssh-keygen -D pkcs11
      ssh-keygen -F hostname [-lv] [-f known_hosts_file]
      ssh-keygen -H [-f known_hosts_file]
      ssh-keygen -K [-a rounds] [-w provider]
      ssh-keygen -R hostname [-f known_hosts_file]
      ssh-keygen -r hostname [-g] [-f input_keyfile]
      ssh-keygen -M generate [-O option] output_file
      ssh-keygen -M screen [-f input_file] [-O option] output_file
      ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]
                 [-n principals] [-O option] [-V validity_interval]
                 [-z serial_number] file ...
      ssh-keygen -L [-f input_keyfile]
      ssh-keygen -A [-a rounds] [-f prefix_path]
      ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]
                 file ...
      ssh-keygen -Q [-l] -f krl_file file ...
      ssh-keygen -Y find-principals [-O option] -s signature_file
                 -f allowed_signers_file
      ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file
      ssh-keygen -Y check-novalidate [-O option] -n namespace -s signature_file
      ssh-keygen -Y sign [-O option] -f key_file -n namespace file ...
      ssh-keygen -Y verify [-O option] -f allowed_signers_file
                 -I signer_identity -n namespace -s signature_file
                 [-r revocation_file]
 
 DESCRIPTION
      ssh-keygen generates, manages and converts authentication keys for
      ssh(1).  ssh-keygen can create keys for use by SSH protocol version 2.
 
      The type of key to be generated is specified with the -t option.  If
      invoked without any arguments, ssh-keygen will generate an Ed25519 key.
 
      ssh-keygen is also used to generate groups for use in Diffie-Hellman
      group exchange (DH-GEX).  See the MODULI GENERATION section for details.
 
      Finally, ssh-keygen can be used to generate and update Key Revocation
      Lists, and to test whether given keys have been revoked by one.  See the
      KEY REVOCATION LISTS section for details.
 
      Normally each user wishing to use SSH with public key authentication runs
      this once to create the authentication key in ~/.ssh/id_dsa,
      ~/.ssh/id_ecdsa, ~/.ssh/id_ecdsa_sk, ~/.ssh/id_ed25519,
      ~/.ssh/id_ed25519_sk or ~/.ssh/id_rsa.  Additionally, the system
      administrator may use this to generate host keys, as seen in /etc/rc.
 
      Normally this program generates the key and asks for a file in which to
      store the private key.  The public key is stored in a file with the same
      name but M-bM-^@M-^\.pubM-bM-^@M-^] appended.  The program also asks for a passphrase.  The
      passphrase may be empty to indicate no passphrase (host keys must have an
      empty passphrase), or it may be a string of arbitrary length.  A
      passphrase is similar to a password, except it can be a phrase with a
      series of words, punctuation, numbers, whitespace, or any string of
      characters you want.  Good passphrases are 10-30 characters long, are not
      simple sentences or otherwise easily guessable (English prose has only
      1-2 bits of entropy per character, and provides very bad passphrases),
      and contain a mix of upper and lowercase letters, numbers, and non-
      alphanumeric characters.  The passphrase can be changed later by using
      the -p option.
 
      There is no way to recover a lost passphrase.  If the passphrase is lost
      or forgotten, a new key must be generated and the corresponding public
      key copied to other machines.
 
      ssh-keygen will by default write keys in an OpenSSH-specific format.
      This format is preferred as it offers better protection for keys at rest
      as well as allowing storage of key comments within the private key file
      itself.  The key comment may be useful to help identify the key.  The
      comment is initialized to M-bM-^@M-^\user@hostM-bM-^@M-^] when the key is created, but can be
      changed using the -c option.
 
      It is still possible for ssh-keygen to write the previously-used PEM
      format private keys using the -m flag.  This may be used when generating
      new keys, and existing new-format keys may be converted using this option
      in conjunction with the -p (change passphrase) flag.
 
      After a key is generated, ssh-keygen will ask where the keys should be
      placed to be activated.
 
      The options are as follows:
 
      -A      Generate host keys of all default key types (rsa, ecdsa, and
              ed25519) if they do not already exist.  The host keys are
              generated with the default key file path, an empty passphrase,
              default bits for the key type, and default comment.  If -f has
              also been specified, its argument is used as a prefix to the
              default path for the resulting host key files.  This is used by
              /etc/rc to generate new host keys.
 
      -a rounds
              When saving a private key, this option specifies the number of
              KDF (key derivation function, currently bcrypt_pbkdf(3)) rounds
              used.  Higher numbers result in slower passphrase verification
              and increased resistance to brute-force password cracking (should
              the keys be stolen).  The default is 16 rounds.
 
      -B      Show the bubblebabble digest of specified private or public key
              file.
 
      -b bits
              Specifies the number of bits in the key to create.  For RSA keys,
              the minimum size is 1024 bits and the default is 3072 bits.
              Generally, 3072 bits is considered sufficient.  DSA keys must be
              exactly 1024 bits as specified by FIPS 186-2.  For ECDSA keys,
              the -b flag determines the key length by selecting from one of
              three elliptic curve sizes: 256, 384 or 521 bits.  Attempting to
              use bit lengths other than these three values for ECDSA keys will
              fail.  ECDSA-SK, Ed25519 and Ed25519-SK keys have a fixed length
              and the -b flag will be ignored.
 
      -C comment
              Provides a new comment.
 
      -c      Requests changing the comment in the private and public key
              files.  The program will prompt for the file containing the
              private keys, for the passphrase if the key has one, and for the
              new comment.
 
      -D pkcs11
              Download the public keys provided by the PKCS#11 shared library
              pkcs11.  When used in combination with -s, this option indicates
              that a CA key resides in a PKCS#11 token (see the CERTIFICATES
              section for details).
 
      -E fingerprint_hash
              Specifies the hash algorithm used when displaying key
              fingerprints.  Valid options are: M-bM-^@M-^\md5M-bM-^@M-^] and M-bM-^@M-^\sha256M-bM-^@M-^].  The
              default is M-bM-^@M-^\sha256M-bM-^@M-^].
 
      -e      This option will read a private or public OpenSSH key file and
              print to stdout a public key in one of the formats specified by
              the -m option.  The default export format is M-bM-^@M-^\RFC4716M-bM-^@M-^].  This
              option allows exporting OpenSSH keys for use by other programs,
              including several commercial SSH implementations.
 
      -F hostname | [hostname]:port
              Search for the specified hostname (with optional port number) in
              a known_hosts file, listing any occurrences found.  This option
              is useful to find hashed host names or addresses and may also be
              used in conjunction with the -H option to print found keys in a
              hashed format.
 
      -f filename
              Specifies the filename of the key file.
 
      -g      Use generic DNS format when printing fingerprint resource records
              using the -r command.
 
      -H      Hash a known_hosts file.  This replaces all hostnames and
              addresses with hashed representations within the specified file;
              the original content is moved to a file with a .old suffix.
              These hashes may be used normally by ssh and sshd, but they do
              not reveal identifying information should the file's contents be
              disclosed.  This option will not modify existing hashed hostnames
              and is therefore safe to use on files that mix hashed and non-
              hashed names.
 
      -h      When signing a key, create a host certificate instead of a user
              certificate.  See the CERTIFICATES section for details.
 
      -I certificate_identity
              Specify the key identity when signing a public key.  See the
              CERTIFICATES section for details.
 
      -i      This option will read an unencrypted private (or public) key file
              in the format specified by the -m option and print an OpenSSH
              compatible private (or public) key to stdout.  This option allows
              importing keys from other software, including several commercial
              SSH implementations.  The default import format is M-bM-^@M-^\RFC4716M-bM-^@M-^].
 
      -K      Download resident keys from a FIDO authenticator.  Public and
              private key files will be written to the current directory for
              each downloaded key.  If multiple FIDO authenticators are
              attached, keys will be downloaded from the first touched
              authenticator.  See the FIDO AUTHENTICATOR section for more
              information.
 
      -k      Generate a KRL file.  In this mode, ssh-keygen will generate a
              KRL file at the location specified via the -f flag that revokes
              every key or certificate presented on the command line.
              Keys/certificates to be revoked may be specified by public key
              file or using the format described in the KEY REVOCATION LISTS
              section.
 
      -L      Prints the contents of one or more certificates.
 
      -l      Show fingerprint of specified public key file.  For RSA and DSA
              keys ssh-keygen tries to find the matching public key file and
              prints its fingerprint.  If combined with -v, a visual ASCII art
              representation of the key is supplied with the fingerprint.
 
      -M generate
              Generate candidate Diffie-Hellman Group Exchange (DH-GEX)
              parameters for eventual use by the
              M-bM-^@M-^Xdiffie-hellman-group-exchange-*M-bM-^@M-^Y key exchange methods.  The
              numbers generated by this operation must be further screened
              before use.  See the MODULI GENERATION section for more
              information.
 
      -M screen
              Screen candidate parameters for Diffie-Hellman Group Exchange.
              This will accept a list of candidate numbers and test that they
              are safe (Sophie Germain) primes with acceptable group
              generators.  The results of this operation may be added to the
              /etc/moduli file.  See the MODULI GENERATION section for more
              information.
 
      -m key_format
              Specify a key format for key generation, the -i (import), -e
              (export) conversion options, and the -p change passphrase
              operation.  The latter may be used to convert between OpenSSH
              private key and PEM private key formats.  The supported key
              formats are: M-bM-^@M-^\RFC4716M-bM-^@M-^] (RFC 4716/SSH2 public or private key),
              M-bM-^@M-^\PKCS8M-bM-^@M-^] (PKCS8 public or private key) or M-bM-^@M-^\PEMM-bM-^@M-^] (PEM public key).
              By default OpenSSH will write newly-generated private keys in its
              own format, but when converting public keys for export the
              default format is M-bM-^@M-^\RFC4716M-bM-^@M-^].  Setting a format of M-bM-^@M-^\PEMM-bM-^@M-^] when
              generating or updating a supported private key type will cause
              the key to be stored in the legacy PEM private key format.
 
      -N new_passphrase
              Provides the new passphrase.
 
      -n principals
              Specify one or more principals (user or host names) to be
              included in a certificate when signing a key.  Multiple
              principals may be specified, separated by commas.  See the
              CERTIFICATES section for details.
 
      -O option
              Specify a key/value option.  These are specific to the operation
              that ssh-keygen has been requested to perform.
 
              When signing certificates, one of the options listed in the
              CERTIFICATES section may be specified here.
 
              When performing moduli generation or screening, one of the
              options listed in the MODULI GENERATION section may be specified.
 
              When generating FIDO authenticator-backed keys, the options
              listed in the FIDO AUTHENTICATOR section may be specified.
 
              When performing signature-related options using the -Y flag, the
              following options are accepted:
 
              hashalg=algorithm
                      Selects the hash algorithm to use for hashing the message
                      to be signed.  Valid algorithms are M-bM-^@M-^\sha256M-bM-^@M-^] and
                      M-bM-^@M-^\sha512.M-bM-^@M-^] The default is M-bM-^@M-^\sha512.M-bM-^@M-^]
 
              print-pubkey
                      Print the full public key to standard output after
                      signature verification.
 
              verify-time=timestamp
                      Specifies a time to use when validating signatures
                      instead of the current time.  The time may be specified
                      as a date or time in the YYYYMMDD[Z] or in
                      YYYYMMDDHHMM[SS][Z] formats.  Dates and times will be
                      interpreted in the current system time zone unless
                      suffixed with a Z character, which causes them to be
                      interpreted in the UTC time zone.
 
              When generating SSHFP DNS records from public keys using the -r
              flag, the following options are accepted:
 
              hashalg=algorithm
                      Selects a hash algorithm to use when printing SSHFP
                      records using the -D flag.  Valid algorithms are M-bM-^@M-^\sha1M-bM-^@M-^]
                      and M-bM-^@M-^\sha256M-bM-^@M-^].  The default is to print both.
 
              The -O option may be specified multiple times.
 
      -P passphrase
              Provides the (old) passphrase.
 
      -p      Requests changing the passphrase of a private key file instead of
              creating a new private key.  The program will prompt for the file
              containing the private key, for the old passphrase, and twice for
              the new passphrase.
 
      -Q      Test whether keys have been revoked in a KRL.  If the -l option
              is also specified then the contents of the KRL will be printed.
 
      -q      Silence ssh-keygen.
 
      -R hostname | [hostname]:port
              Removes all keys belonging to the specified hostname (with
              optional port number) from a known_hosts file.  This option is
              useful to delete hashed hosts (see the -H option above).
 
      -r hostname
              Print the SSHFP fingerprint resource record named hostname for
              the specified public key file.
 
      -s ca_key
              Certify (sign) a public key using the specified CA key.  See the
              CERTIFICATES section for details.
 
              When generating a KRL, -s specifies a path to a CA public key
              file used to revoke certificates directly by key ID or serial
              number.  See the KEY REVOCATION LISTS section for details.
 
      -t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa
              Specifies the type of key to create.  The possible values are
              M-bM-^@M-^\dsaM-bM-^@M-^], M-bM-^@M-^\ecdsaM-bM-^@M-^], M-bM-^@M-^\ecdsa-skM-bM-^@M-^], M-bM-^@M-^\ed25519M-bM-^@M-^], M-bM-^@M-^\ed25519-skM-bM-^@M-^], or M-bM-^@M-^\rsaM-bM-^@M-^].
 
              This flag may also be used to specify the desired signature type
              when signing certificates using an RSA CA key.  The available RSA
              signature variants are M-bM-^@M-^\ssh-rsaM-bM-^@M-^] (SHA1 signatures, not
              recommended), M-bM-^@M-^\rsa-sha2-256M-bM-^@M-^], and M-bM-^@M-^\rsa-sha2-512M-bM-^@M-^] (the default).
 
      -U      When used in combination with -s or -Y sign, this option
              indicates that a CA key resides in a ssh-agent(1).  See the
              CERTIFICATES section for more information.
 
      -u      Update a KRL.  When specified with -k, keys listed via the
              command line are added to the existing KRL rather than a new KRL
              being created.
 
      -V validity_interval
              Specify a validity interval when signing a certificate.  A
              validity interval may consist of a single time, indicating that
              the certificate is valid beginning now and expiring at that time,
              or may consist of two times separated by a colon to indicate an
              explicit time interval.
 
              The start time may be specified as:
              M-bM-^@M-M-bM-^@M-"   The string M-bM-^@M-^\alwaysM-bM-^@M-^] to indicate the certificate has no
                  specified start time.
              M-bM-^@M-M-bM-^@M-"   A date or time in the system time zone formatted as YYYYMMDD
                  or YYYYMMDDHHMM[SS].
              M-bM-^@M-M-bM-^@M-"   A date or time in the UTC time zone as YYYYMMDDZ or
                  YYYYMMDDHHMM[SS]Z.
              M-bM-^@M-M-bM-^@M-"   A relative time before the current system time consisting of
                  a minus sign followed by an interval in the format described
                  in the TIME FORMATS section of sshd_config(5).
              M-bM-^@M-M-bM-^@M-"   A raw seconds since epoch (Jan 1 1970 00:00:00 UTC) as a
                  hexadecimal number beginning with M-bM-^@M-^\0xM-bM-^@M-^].
 
              The end time may be specified similarly to the start time:
              M-bM-^@M-M-bM-^@M-"   The string M-bM-^@M-^\foreverM-bM-^@M-^] to indicate the certificate has no
                  specified end time.
              M-bM-^@M-M-bM-^@M-"   A date or time in the system time zone formatted as YYYYMMDD
                  or YYYYMMDDHHMM[SS].
              M-bM-^@M-M-bM-^@M-"   A date or time in the UTC time zone as YYYYMMDDZ or
                  YYYYMMDDHHMM[SS]Z.
              M-bM-^@M-M-bM-^@M-"   A relative time after the current system time consisting of a
                  plus sign followed by an interval in the format described in
                  the TIME FORMATS section of sshd_config(5).
              M-bM-^@M-M-bM-^@M-"   A raw seconds since epoch (Jan 1 1970 00:00:00 UTC) as a
                  hexadecimal number beginning with M-bM-^@M-^\0xM-bM-^@M-^].
 
              For example:
 
              +52w1d  Valid from now to 52 weeks and one day from now.
 
              -4w:+4w
                      Valid from four weeks ago to four weeks from now.
 
              20100101123000:20110101123000
                      Valid from 12:30 PM, January 1st, 2010 to 12:30 PM,
                      January 1st, 2011.
 
              20100101123000Z:20110101123000Z
                      Similar, but interpreted in the UTC time zone rather than
                      the system time zone.
 
              -1d:20110101
                      Valid from yesterday to midnight, January 1st, 2011.
 
              0x1:0x2000000000
                      Valid from roughly early 1970 to May 2033.
 
              -1m:forever
                      Valid from one minute ago and never expiring.
 
      -v      Verbose mode.  Causes ssh-keygen to print debugging messages
              about its progress.  This is helpful for debugging moduli
              generation.  Multiple -v options increase the verbosity.  The
              maximum is 3.
 
      -w provider
              Specifies a path to a library that will be used when creating
              FIDO authenticator-hosted keys, overriding the default of using
              the internal USB HID support.
 
      -Y find-principals
              Find the principal(s) associated with the public key of a
              signature, provided using the -s flag in an authorized signers
              file provided using the -f flag.  The format of the allowed
              signers file is documented in the ALLOWED SIGNERS section below.
              If one or more matching principals are found, they are returned
              on standard output.
 
      -Y match-principals
              Find principal matching the principal name provided using the -I
              flag in the authorized signers file specified using the -f flag.
              If one or more matching principals are found, they are returned
              on standard output.
 
      -Y check-novalidate
              Checks that a signature generated using ssh-keygen -Y sign has a
              valid structure.  This does not validate if a signature comes
              from an authorized signer.  When testing a signature, ssh-keygen
              accepts a message on standard input and a signature namespace
              using -n.  A file containing the corresponding signature must
              also be supplied using the -s flag.  Successful testing of the
              signature is signalled by ssh-keygen returning a zero exit
              status.
 
      -Y sign
              Cryptographically sign a file or some data using an SSH key.
              When signing, ssh-keygen accepts zero or more files to sign on
              the command-line - if no files are specified then ssh-keygen will
              sign data presented on standard input.  Signatures are written to
              the path of the input file with M-bM-^@M-^\.sigM-bM-^@M-^] appended, or to standard
              output if the message to be signed was read from standard input.
 
              The key used for signing is specified using the -f option and may
              refer to either a private key, or a public key with the private
              half available via ssh-agent(1).  An additional signature
              namespace, used to prevent signature confusion across different
              domains of use (e.g. file signing vs email signing) must be
              provided via the -n flag.  Namespaces are arbitrary strings, and
              may include: M-bM-^@M-^\fileM-bM-^@M-^] for file signing, M-bM-^@M-^\emailM-bM-^@M-^] for email signing.
              For custom uses, it is recommended to use names following a
              NAMESPACE@YOUR.DOMAIN pattern to generate unambiguous namespaces.
 
      -Y verify
              Request to verify a signature generated using ssh-keygen -Y sign
              as described above.  When verifying a signature, ssh-keygen
              accepts a message on standard input and a signature namespace
              using -n.  A file containing the corresponding signature must
              also be supplied using the -s flag, along with the identity of
              the signer using -I and a list of allowed signers via the -f
              flag.  The format of the allowed signers file is documented in
              the ALLOWED SIGNERS section below.  A file containing revoked
              keys can be passed using the -r flag.  The revocation file may be
              a KRL or a one-per-line list of public keys.  Successful
              verification by an authorized signer is signalled by ssh-keygen
              returning a zero exit status.
 
      -y      This option will read a private OpenSSH format file and print an
              OpenSSH public key to stdout.
 
      -Z cipher
              Specifies the cipher to use for encryption when writing an
              OpenSSH-format private key file.  The list of available ciphers
              may be obtained using "ssh -Q cipher".  The default is
              M-bM-^@M-^\aes256-ctrM-bM-^@M-^].
 
      -z serial_number
              Specifies a serial number to be embedded in the certificate to
              distinguish this certificate from others from the same CA.  If
              the serial_number is prefixed with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the
              serial number will be incremented for each certificate signed on
              a single command-line.  The default serial number is zero.
 
              When generating a KRL, the -z flag is used to specify a KRL
              version number.
 
 MODULI GENERATION
      ssh-keygen may be used to generate groups for the Diffie-Hellman Group
      Exchange (DH-GEX) protocol.  Generating these groups is a two-step
      process: first, candidate primes are generated using a fast, but memory
      intensive process.  These candidate primes are then tested for
      suitability (a CPU-intensive process).
 
      Generation of primes is performed using the -M generate option.  The
      desired length of the primes may be specified by the -O bits option.  For
      example:
 
            # ssh-keygen -M generate -O bits=2048 moduli-2048.candidates
 
      By default, the search for primes begins at a random point in the desired
      length range.  This may be overridden using the -O start option, which
      specifies a different start point (in hex).
 
      Once a set of candidates have been generated, they must be screened for
      suitability.  This may be performed using the -M screen option.  In this
      mode ssh-keygen will read candidates from standard input (or a file
      specified using the -f option).  For example:
 
            # ssh-keygen -M screen -f moduli-2048.candidates moduli-2048
 
      By default, each candidate will be subjected to 100 primality tests.
      This may be overridden using the -O prime-tests option.  The DH generator
      value will be chosen automatically for the prime under consideration.  If
      a specific generator is desired, it may be requested using the -O
      generator option.  Valid generator values are 2, 3, and 5.
 
      Screened DH groups may be installed in /etc/moduli.  It is important that
      this file contains moduli of a range of bit lengths.
 
      A number of options are available for moduli generation and screening via
      the -O flag:
 
      lines=number
              Exit after screening the specified number of lines while
              performing DH candidate screening.
 
      start-line=line-number
              Start screening at the specified line number while performing DH
              candidate screening.
 
      checkpoint=filename
              Write the last line processed to the specified file while
              performing DH candidate screening.  This will be used to skip
              lines in the input file that have already been processed if the
              job is restarted.
 
      memory=mbytes
              Specify the amount of memory to use (in megabytes) when
              generating candidate moduli for DH-GEX.
 
      start=hex-value
              Specify start point (in hex) when generating candidate moduli for
              DH-GEX.
 
      generator=value
              Specify desired generator (in decimal) when testing candidate
              moduli for DH-GEX.
 
 CERTIFICATES
      ssh-keygen supports signing of keys to produce certificates that may be
      used for user or host authentication.  Certificates consist of a public
      key, some identity information, zero or more principal (user or host)
      names and a set of options that are signed by a Certification Authority
      (CA) key.  Clients or servers may then trust only the CA key and verify
      its signature on a certificate rather than trusting many user/host keys.
      Note that OpenSSH certificates are a different, and much simpler, format
      to the X.509 certificates used in ssl(8).
 
      ssh-keygen supports two types of certificates: user and host.  User
      certificates authenticate users to servers, whereas host certificates
      authenticate server hosts to users.  To generate a user certificate:
 
            $ ssh-keygen -s /path/to/ca_key -I key_id /path/to/user_key.pub
 
      The resultant certificate will be placed in /path/to/user_key-cert.pub.
      A host certificate requires the -h option:
 
            $ ssh-keygen -s /path/to/ca_key -I key_id -h /path/to/host_key.pub
 
      The host certificate will be output to /path/to/host_key-cert.pub.
 
      It is possible to sign using a CA key stored in a PKCS#11 token by
      providing the token library using -D and identifying the CA key by
      providing its public half as an argument to -s:
 
            $ ssh-keygen -s ca_key.pub -D libpkcs11.so -I key_id user_key.pub
 
      Similarly, it is possible for the CA key to be hosted in a ssh-agent(1).
      This is indicated by the -U flag and, again, the CA key must be
      identified by its public half.
 
            $ ssh-keygen -Us ca_key.pub -I key_id user_key.pub
 
      In all cases, key_id is a "key identifier" that is logged by the server
      when the certificate is used for authentication.
 
      Certificates may be limited to be valid for a set of principal
      (user/host) names.  By default, generated certificates are valid for all
      users or hosts.  To generate a certificate for a specified set of
      principals:
 
            $ ssh-keygen -s ca_key -I key_id -n user1,user2 user_key.pub
            $ ssh-keygen -s ca_key -I key_id -h -n host.domain host_key.pub
 
      Additional limitations on the validity and use of user certificates may
      be specified through certificate options.  A certificate option may
      disable features of the SSH session, may be valid only when presented
      from particular source addresses or may force the use of a specific
      command.
 
      The options that are valid for user certificates are:
 
      clear   Clear all enabled permissions.  This is useful for clearing the
              default set of permissions so permissions may be added
              individually.
 
      critical:name[=contents]
      extension:name[=contents]
              Includes an arbitrary certificate critical option or extension.
              The specified name should include a domain suffix, e.g.
              M-bM-^@M-^\name@example.comM-bM-^@M-^].  If contents is specified then it is included
              as the contents of the extension/option encoded as a string,
              otherwise the extension/option is created with no contents
              (usually indicating a flag).  Extensions may be ignored by a
              client or server that does not recognise them, whereas unknown
              critical options will cause the certificate to be refused.
 
      force-command=command
              Forces the execution of command instead of any shell or command
              specified by the user when the certificate is used for
              authentication.
 
      no-agent-forwarding
              Disable ssh-agent(1) forwarding (permitted by default).
 
      no-port-forwarding
              Disable port forwarding (permitted by default).
 
      no-pty  Disable PTY allocation (permitted by default).
 
      no-user-rc
              Disable execution of ~/.ssh/rc by sshd(8) (permitted by default).
 
      no-x11-forwarding
              Disable X11 forwarding (permitted by default).
 
      permit-agent-forwarding
              Allows ssh-agent(1) forwarding.
 
      permit-port-forwarding
              Allows port forwarding.
 
      permit-pty
              Allows PTY allocation.
 
      permit-user-rc
              Allows execution of ~/.ssh/rc by sshd(8).
 
      permit-X11-forwarding
              Allows X11 forwarding.
 
      no-touch-required
              Do not require signatures made using this key include
              demonstration of user presence (e.g. by having the user touch the
              authenticator).  This option only makes sense for the FIDO
              authenticator algorithms ecdsa-sk and ed25519-sk.
 
      source-address=address_list
              Restrict the source addresses from which the certificate is
              considered valid.  The address_list is a comma-separated list of
              one or more address/netmask pairs in CIDR format.
 
      verify-required
              Require signatures made using this key indicate that the user was
              first verified.  This option only makes sense for the FIDO
              authenticator algorithms ecdsa-sk and ed25519-sk.  Currently PIN
              authentication is the only supported verification method, but
              other methods may be supported in the future.
 
      At present, no standard options are valid for host keys.
 
      Finally, certificates may be defined with a validity lifetime.  The -V
      option allows specification of certificate start and end times.  A
      certificate that is presented at a time outside this range will not be
      considered valid.  By default, certificates are valid from the UNIX Epoch
      to the distant future.
 
      For certificates to be used for user or host authentication, the CA
      public key must be trusted by sshd(8) or ssh(1).  Refer to those manual
      pages for details.
 
 FIDO AUTHENTICATOR
      ssh-keygen is able to generate FIDO authenticator-backed keys, after
      which they may be used much like any other key type supported by OpenSSH,
      so long as the hardware authenticator is attached when the keys are used.
      FIDO authenticators generally require the user to explicitly authorise
      operations by touching or tapping them.  FIDO keys consist of two parts:
      a key handle part stored in the private key file on disk, and a per-
      device private key that is unique to each FIDO authenticator and that
      cannot be exported from the authenticator hardware.  These are combined
      by the hardware at authentication time to derive the real key that is
      used to sign authentication challenges.  Supported key types are ecdsa-sk
      and ed25519-sk.
 
      The options that are valid for FIDO keys are:
 
      application
              Override the default FIDO application/origin string of M-bM-^@M-^\ssh:M-bM-^@M-^].
              This may be useful when generating host or domain-specific
              resident keys.  The specified application string must begin with
              M-bM-^@M-^\ssh:M-bM-^@M-^].
 
      challenge=path
              Specifies a path to a challenge string that will be passed to the
              FIDO authenticator during key generation.  The challenge string
              may be used as part of an out-of-band protocol for key enrollment
              (a random challenge is used by default).
 
      device  Explicitly specify a fido(4) device to use, rather than letting
              the authenticator middleware select one.
 
      no-touch-required
              Indicate that the generated private key should not require touch
              events (user presence) when making signatures.  Note that sshd(8)
              will refuse such signatures by default, unless overridden via an
              authorized_keys option.
 
      resident
              Indicate that the key handle should be stored on the FIDO
              authenticator itself.  This makes it easier to use the
              authenticator on multiple computers.  Resident keys may be
              supported on FIDO2 authenticators and typically require that a
              PIN be set on the authenticator prior to generation.  Resident
              keys may be loaded off the authenticator using ssh-add(1).
              Storing both parts of a key on a FIDO authenticator increases the
              likelihood of an attacker being able to use a stolen
              authenticator device.
 
      user    A username to be associated with a resident key, overriding the
              empty default username.  Specifying a username may be useful when
              generating multiple resident keys for the same application name.
 
      verify-required
              Indicate that this private key should require user verification
              for each signature.  Not all FIDO authenticators support this
              option.  Currently PIN authentication is the only supported
              verification method, but other methods may be supported in the
              future.
 
      write-attestation=path
              May be used at key generation time to record the attestation data
              returned from FIDO authenticators during key generation.  This
              information is potentially sensitive.  By default, this
              information is discarded.
 
 KEY REVOCATION LISTS
      ssh-keygen is able to manage OpenSSH format Key Revocation Lists (KRLs).
      These binary files specify keys or certificates to be revoked using a
      compact format, taking as little as one bit per certificate if they are
      being revoked by serial number.
 
      KRLs may be generated using the -k flag.  This option reads one or more
      files from the command line and generates a new KRL.  The files may
      either contain a KRL specification (see below) or public keys, listed one
      per line.  Plain public keys are revoked by listing their hash or
      contents in the KRL and certificates revoked by serial number or key ID
      (if the serial is zero or not available).
 
      Revoking keys using a KRL specification offers explicit control over the
      types of record used to revoke keys and may be used to directly revoke
      certificates by serial number or key ID without having the complete
      original certificate on hand.  A KRL specification consists of lines
      containing one of the following directives followed by a colon and some
      directive-specific information.
 
      serial: serial_number[-serial_number]
              Revokes a certificate with the specified serial number.  Serial
              numbers are 64-bit values, not including zero and may be
              expressed in decimal, hex or octal.  If two serial numbers are
              specified separated by a hyphen, then the range of serial numbers
              including and between each is revoked.  The CA key must have been
              specified on the ssh-keygen command line using the -s option.
 
      id: key_id
              Revokes a certificate with the specified key ID string.  The CA
              key must have been specified on the ssh-keygen command line using
              the -s option.
 
      key: public_key
              Revokes the specified key.  If a certificate is listed, then it
              is revoked as a plain public key.
 
      sha1: public_key
              Revokes the specified key by including its SHA1 hash in the KRL.
 
      sha256: public_key
              Revokes the specified key by including its SHA256 hash in the
              KRL.  KRLs that revoke keys by SHA256 hash are not supported by
              OpenSSH versions prior to 7.9.
 
      hash: fingerprint
              Revokes a key using a fingerprint hash, as obtained from a
              sshd(8) authentication log message or the ssh-keygen -l flag.
              Only SHA256 fingerprints are supported here and resultant KRLs
              are not supported by OpenSSH versions prior to 7.9.
 
      KRLs may be updated using the -u flag in addition to -k.  When this
      option is specified, keys listed via the command line are merged into the
      KRL, adding to those already there.
 
      It is also possible, given a KRL, to test whether it revokes a particular
      key (or keys).  The -Q flag will query an existing KRL, testing each key
      specified on the command line.  If any key listed on the command line has
      been revoked (or an error encountered) then ssh-keygen will exit with a
      non-zero exit status.  A zero exit status will only be returned if no key
      was revoked.
 
 ALLOWED SIGNERS
      When verifying signatures, ssh-keygen uses a simple list of identities
      and keys to determine whether a signature comes from an authorized
      source.  This "allowed signers" file uses a format patterned after the
      AUTHORIZED_KEYS FILE FORMAT described in sshd(8).  Each line of the file
      contains the following space-separated fields: principals, options,
      keytype, base64-encoded key.  Empty lines and lines starting with a M-bM-^@M-^X#M-bM-^@M-^Y
      are ignored as comments.
 
      The principals field is a pattern-list (see PATTERNS in ssh_config(5))
      consisting of one or more comma-separated USER@DOMAIN identity patterns
      that are accepted for signing.  When verifying, the identity presented
      via the -I option must match a principals pattern in order for the
      corresponding key to be considered acceptable for verification.
 
      The options (if present) consist of comma-separated option
      specifications.  No spaces are permitted, except within double quotes.
      The following option specifications are supported (note that option
      keywords are case-insensitive):
 
      cert-authority
              Indicates that this key is accepted as a certificate authority
              (CA) and that certificates signed by this CA may be accepted for
              verification.
 
      namespaces=namespace-list
              Specifies a pattern-list of namespaces that are accepted for this
              key.  If this option is present, the signature namespace embedded
              in the signature object and presented on the verification
              command-line must match the specified list before the key will be
              considered acceptable.
 
      valid-after=timestamp
              Indicates that the key is valid for use at or after the specified
              timestamp, which may be a date or time in the YYYYMMDD[Z] or
              YYYYMMDDHHMM[SS][Z] formats.  Dates and times will be interpreted
              in the current system time zone unless suffixed with a Z
              character, which causes them to be interpreted in the UTC time
              zone.
 
      valid-before=timestamp
              Indicates that the key is valid for use at or before the
              specified timestamp.
 
      When verifying signatures made by certificates, the expected principal
      name must match both the principals pattern in the allowed signers file
      and the principals embedded in the certificate itself.
 
      An example allowed signers file:
 
         # Comments allowed at start of line
         user1@example.com,user2@example.com ssh-rsa AAAAX1...
         # A certificate authority, trusted for all principals in a domain.
         *@example.com cert-authority ssh-ed25519 AAAB4...
         # A key that is accepted only for file signing.
         user2@example.com namespaces="file" ssh-ed25519 AAA41...
 
 ENVIRONMENT
      SSH_SK_PROVIDER
              Specifies a path to a library that will be used when loading any
              FIDO authenticator-hosted keys, overriding the default of using
              the built-in USB HID support.
 
 FILES
      ~/.ssh/id_dsa
      ~/.ssh/id_ecdsa
      ~/.ssh/id_ecdsa_sk
      ~/.ssh/id_ed25519
      ~/.ssh/id_ed25519_sk
      ~/.ssh/id_rsa
              Contains the DSA, ECDSA, authenticator-hosted ECDSA, Ed25519,
              authenticator-hosted Ed25519 or RSA authentication identity of
              the user.  This file should not be readable by anyone but the
              user.  It is possible to specify a passphrase when generating the
              key; that passphrase will be used to encrypt the private part of
              this file using 128-bit AES.  This file is not automatically
              accessed by ssh-keygen but it is offered as the default file for
              the private key.  ssh(1) will read this file when a login attempt
              is made.
 
      ~/.ssh/id_dsa.pub
      ~/.ssh/id_ecdsa.pub
      ~/.ssh/id_ecdsa_sk.pub
      ~/.ssh/id_ed25519.pub
      ~/.ssh/id_ed25519_sk.pub
      ~/.ssh/id_rsa.pub
              Contains the DSA, ECDSA, authenticator-hosted ECDSA, Ed25519,
              authenticator-hosted Ed25519 or RSA public key for
              authentication.  The contents of this file should be added to
              ~/.ssh/authorized_keys on all machines where the user wishes to
              log in using public key authentication.  There is no need to keep
              the contents of this file secret.
 
      /etc/moduli
              Contains Diffie-Hellman groups used for DH-GEX.  The file format
              is described in moduli(5).
 
 SEE ALSO
      ssh(1), ssh-add(1), ssh-agent(1), moduli(5), sshd(8)
 
      The Secure Shell (SSH) Public Key File Format, RFC 4716, 2006.
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.
 
-OpenBSD 7.3                    September 4, 2023                   OpenBSD 7.3
+OpenBSD 7.5                    September 4, 2023                   OpenBSD 7.5
diff --git a/ssh-keygen.c b/ssh-keygen.c
index 5b945a849202..97c6d134a16f 100644
--- a/ssh-keygen.c
+++ b/ssh-keygen.c
@@ -1,3949 +1,3967 @@
-/* $OpenBSD: ssh-keygen.c,v 1.471 2023/09/04 10:29:58 job Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.472 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Identity and host key generation and maintenance.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include <openssl/pem.h>
 #include "openbsd-compat/openssl-compat.h"
 #endif
 
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
 #include <pwd.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
 #include <locale.h>
 #include <time.h>
 
 #include "xmalloc.h"
 #include "sshkey.h"
 #include "authfile.h"
 #include "sshbuf.h"
 #include "pathnames.h"
 #include "log.h"
 #include "misc.h"
 #include "match.h"
 #include "hostfile.h"
 #include "dns.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "ssherr.h"
 #include "ssh-pkcs11.h"
 #include "atomicio.h"
 #include "krl.h"
 #include "digest.h"
 #include "utf8.h"
 #include "authfd.h"
 #include "sshsig.h"
 #include "ssh-sk.h"
 #include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */
 #include "cipher.h"
 
 #define DEFAULT_KEY_TYPE_NAME "ed25519"
 
 /*
  * Default number of bits in the RSA, DSA and ECDSA keys.  These value can be
  * overridden on the command line.
  *
  * These values, with the exception of DSA, provide security equivalent to at
  * least 128 bits of security according to NIST Special Publication 800-57:
  * Recommendation for Key Management Part 1 rev 4 section 5.6.1.
  * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
  * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
  * SHA1 we limit the DSA key size 1k bits.
  */
 #define DEFAULT_BITS		3072
 #define DEFAULT_BITS_DSA	1024
 #define DEFAULT_BITS_ECDSA	256
 
 static int quiet = 0;
 
 /* Flag indicating that we just want to see the key fingerprint */
 static int print_fingerprint = 0;
 static int print_bubblebabble = 0;
 
 /* Hash algorithm to use for fingerprints. */
 static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
 
 /* The identity file name, given on the command line or entered by the user. */
 static char identity_file[PATH_MAX];
 static int have_identity = 0;
 
 /* This is set to the passphrase if given on the command line. */
 static char *identity_passphrase = NULL;
 
 /* This is set to the new passphrase if given on the command line. */
 static char *identity_new_passphrase = NULL;
 
 /* Key type when certifying */
 static u_int cert_key_type = SSH2_CERT_TYPE_USER;
 
 /* "key ID" of signed key */
 static char *cert_key_id = NULL;
 
 /* Comma-separated list of principal names for certifying keys */
 static char *cert_principals = NULL;
 
 /* Validity period for certificates */
 static u_int64_t cert_valid_from = 0;
 static u_int64_t cert_valid_to = ~0ULL;
 
 /* Certificate options */
 #define CERTOPT_X_FWD				(1)
 #define CERTOPT_AGENT_FWD			(1<<1)
 #define CERTOPT_PORT_FWD			(1<<2)
 #define CERTOPT_PTY				(1<<3)
 #define CERTOPT_USER_RC				(1<<4)
 #define CERTOPT_NO_REQUIRE_USER_PRESENCE	(1<<5)
 #define CERTOPT_REQUIRE_VERIFY			(1<<6)
 #define CERTOPT_DEFAULT	(CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
 			 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
 static u_int32_t certflags_flags = CERTOPT_DEFAULT;
 static char *certflags_command = NULL;
 static char *certflags_src_addr = NULL;
 
 /* Arbitrary extensions specified by user */
 struct cert_ext {
 	char *key;
 	char *val;
 	int crit;
 };
 static struct cert_ext *cert_ext;
 static size_t ncert_ext;
 
 /* Conversion to/from various formats */
 enum {
 	FMT_RFC4716,
 	FMT_PKCS8,
 	FMT_PEM
 } convert_format = FMT_RFC4716;
 
 static char *key_type_name = NULL;
 
 /* Load key from this PKCS#11 provider */
 static char *pkcs11provider = NULL;
 
 /* FIDO/U2F provider to use */
 static char *sk_provider = NULL;
 
 /* Format for writing private keys */
 static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
 
 /* Cipher for new-format private keys */
 static char *openssh_format_cipher = NULL;
 
 /* Number of KDF rounds to derive new format keys. */
 static int rounds = 0;
 
 /* argv0 */
 extern char *__progname;
 
 static char hostname[NI_MAXHOST];
 
 #ifdef WITH_OPENSSL
 /* moduli.c */
 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
     unsigned long);
 #endif
 
 static void
 type_bits_valid(int type, const char *name, u_int32_t *bitsp)
 {
 	if (type == KEY_UNSPEC)
 		fatal("unknown key type %s", key_type_name);
 	if (*bitsp == 0) {
 #ifdef WITH_OPENSSL
 		int nid;
 
 		switch(type) {
 		case KEY_DSA:
 			*bitsp = DEFAULT_BITS_DSA;
 			break;
 		case KEY_ECDSA:
 			if (name != NULL &&
 			    (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
 				*bitsp = sshkey_curve_nid_to_bits(nid);
 			if (*bitsp == 0)
 				*bitsp = DEFAULT_BITS_ECDSA;
 			break;
 		case KEY_RSA:
 			*bitsp = DEFAULT_BITS;
 			break;
 		}
 #endif
 	}
 #ifdef WITH_OPENSSL
 	switch (type) {
 	case KEY_DSA:
 		if (*bitsp != 1024)
 			fatal("Invalid DSA key length: must be 1024 bits");
 		break;
 	case KEY_RSA:
 		if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
 			fatal("Invalid RSA key length: minimum is %d bits",
 			    SSH_RSA_MINIMUM_MODULUS_SIZE);
 		else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
 			fatal("Invalid RSA key length: maximum is %d bits",
 			    OPENSSL_RSA_MAX_MODULUS_BITS);
 		break;
 	case KEY_ECDSA:
 		if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
 #ifdef OPENSSL_HAS_NISTP521
 			fatal("Invalid ECDSA key length: valid lengths are "
 			    "256, 384 or 521 bits");
 #else
 			fatal("Invalid ECDSA key length: valid lengths are "
 			    "256 or 384 bits");
 #endif
 	}
 #endif
 }
 
 /*
  * Checks whether a file exists and, if so, asks the user whether they wish
  * to overwrite it.
  * Returns nonzero if the file does not already exist or if the user agrees to
  * overwrite, or zero otherwise.
  */
 static int
 confirm_overwrite(const char *filename)
 {
 	char yesno[3];
 	struct stat st;
 
 	if (stat(filename, &st) != 0)
 		return 1;
 	printf("%s already exists.\n", filename);
 	printf("Overwrite (y/n)? ");
 	fflush(stdout);
 	if (fgets(yesno, sizeof(yesno), stdin) == NULL)
 		return 0;
 	if (yesno[0] != 'y' && yesno[0] != 'Y')
 		return 0;
 	return 1;
 }
 
 static void
 ask_filename(struct passwd *pw, const char *prompt)
 {
 	char buf[1024];
 	char *name = NULL;
 
 	if (key_type_name == NULL)
 		name = _PATH_SSH_CLIENT_ID_ED25519;
 	else {
 		switch (sshkey_type_from_name(key_type_name)) {
+#ifdef WITH_DSA
 		case KEY_DSA_CERT:
 		case KEY_DSA:
 			name = _PATH_SSH_CLIENT_ID_DSA;
 			break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 		case KEY_ECDSA_CERT:
 		case KEY_ECDSA:
 			name = _PATH_SSH_CLIENT_ID_ECDSA;
 			break;
 		case KEY_ECDSA_SK_CERT:
 		case KEY_ECDSA_SK:
 			name = _PATH_SSH_CLIENT_ID_ECDSA_SK;
 			break;
 #endif
 		case KEY_RSA_CERT:
 		case KEY_RSA:
 			name = _PATH_SSH_CLIENT_ID_RSA;
 			break;
 		case KEY_ED25519:
 		case KEY_ED25519_CERT:
 			name = _PATH_SSH_CLIENT_ID_ED25519;
 			break;
 		case KEY_ED25519_SK:
 		case KEY_ED25519_SK_CERT:
 			name = _PATH_SSH_CLIENT_ID_ED25519_SK;
 			break;
 		case KEY_XMSS:
 		case KEY_XMSS_CERT:
 			name = _PATH_SSH_CLIENT_ID_XMSS;
 			break;
 		default:
 			fatal("bad key type");
 		}
 	}
 	snprintf(identity_file, sizeof(identity_file),
 	    "%s/%s", pw->pw_dir, name);
 	printf("%s (%s): ", prompt, identity_file);
 	fflush(stdout);
 	if (fgets(buf, sizeof(buf), stdin) == NULL)
 		exit(1);
 	buf[strcspn(buf, "\n")] = '\0';
 	if (strcmp(buf, "") != 0)
 		strlcpy(identity_file, buf, sizeof(identity_file));
 	have_identity = 1;
 }
 
 static struct sshkey *
 load_identity(const char *filename, char **commentp)
 {
 	char *pass;
 	struct sshkey *prv;
 	int r;
 
 	if (commentp != NULL)
 		*commentp = NULL;
 	if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
 		return prv;
 	if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
 		fatal_r(r, "Load key \"%s\"", filename);
 	if (identity_passphrase)
 		pass = xstrdup(identity_passphrase);
 	else
 		pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
 	r = sshkey_load_private(filename, pass, &prv, commentp);
 	freezero(pass, strlen(pass));
 	if (r != 0)
 		fatal_r(r, "Load key \"%s\"", filename);
 	return prv;
 }
 
 #define SSH_COM_PUBLIC_BEGIN		"---- BEGIN SSH2 PUBLIC KEY ----"
 #define SSH_COM_PUBLIC_END		"---- END SSH2 PUBLIC KEY ----"
 #define SSH_COM_PRIVATE_BEGIN		"---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
 #define	SSH_COM_PRIVATE_KEY_MAGIC	0x3f6ff9eb
 
 #ifdef WITH_OPENSSL
 static void
 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
 {
 	struct sshbuf *b;
 	char comment[61], *b64;
 	int r;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshkey_putb(k, b)) != 0)
 		fatal_fr(r, "put key");
 	if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
 		fatal_f("sshbuf_dtob64_string failed");
 
 	/* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
 	snprintf(comment, sizeof(comment),
 	    "%u-bit %s, converted by %s@%s from OpenSSH",
 	    sshkey_size(k), sshkey_type(k),
 	    pw->pw_name, hostname);
 
 	sshkey_free(k);
 	sshbuf_free(b);
 
 	fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
 	fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
 	fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
 	free(b64);
 	exit(0);
 }
 
 static void
 do_convert_to_pkcs8(struct sshkey *k)
 {
 	switch (sshkey_type_plain(k->type)) {
 	case KEY_RSA:
 		if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
 			fatal("PEM_write_RSA_PUBKEY failed");
 		break;
+#ifdef WITH_DSA
 	case KEY_DSA:
 		if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
 			fatal("PEM_write_DSA_PUBKEY failed");
 		break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 	case KEY_ECDSA:
 		if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
 			fatal("PEM_write_EC_PUBKEY failed");
 		break;
 #endif
 	default:
 		fatal_f("unsupported key type %s", sshkey_type(k));
 	}
 	exit(0);
 }
 
 static void
 do_convert_to_pem(struct sshkey *k)
 {
 	switch (sshkey_type_plain(k->type)) {
 	case KEY_RSA:
 		if (!PEM_write_RSAPublicKey(stdout, k->rsa))
 			fatal("PEM_write_RSAPublicKey failed");
 		break;
+#ifdef WITH_DSA
 	case KEY_DSA:
 		if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
 			fatal("PEM_write_DSA_PUBKEY failed");
 		break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 	case KEY_ECDSA:
 		if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
 			fatal("PEM_write_EC_PUBKEY failed");
 		break;
 #endif
 	default:
 		fatal_f("unsupported key type %s", sshkey_type(k));
 	}
 	exit(0);
 }
 
 static void
 do_convert_to(struct passwd *pw)
 {
 	struct sshkey *k;
 	struct stat st;
 	int r;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 	if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
 		k = load_identity(identity_file, NULL);
 	switch (convert_format) {
 	case FMT_RFC4716:
 		do_convert_to_ssh2(pw, k);
 		break;
 	case FMT_PKCS8:
 		do_convert_to_pkcs8(k);
 		break;
 	case FMT_PEM:
 		do_convert_to_pem(k);
 		break;
 	default:
 		fatal_f("unknown key format %d", convert_format);
 	}
 	exit(0);
 }
 
 /*
  * This is almost exactly the bignum1 encoding, but with 32 bit for length
  * instead of 16.
  */
 static void
 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
 {
 	u_int bytes, bignum_bits;
 	int r;
 
 	if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
 		fatal_fr(r, "parse");
 	bytes = (bignum_bits + 7) / 8;
 	if (sshbuf_len(b) < bytes)
 		fatal_f("input buffer too small: need %d have %zu",
 		    bytes, sshbuf_len(b));
 	if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
 		fatal_f("BN_bin2bn failed");
 	if ((r = sshbuf_consume(b, bytes)) != 0)
 		fatal_fr(r, "consume");
 }
 
 static struct sshkey *
 do_convert_private_ssh2(struct sshbuf *b)
 {
 	struct sshkey *key = NULL;
 	char *type, *cipher;
 	const char *alg = NULL;
 	u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
 	int r, rlen, ktype;
 	u_int magic, i1, i2, i3, i4;
 	size_t slen;
 	u_long e;
+#ifdef WITH_DSA
 	BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
 	BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
+#endif
 	BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
 	BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
 
 	if ((r = sshbuf_get_u32(b, &magic)) != 0)
 		fatal_fr(r, "parse magic");
 
 	if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
 		error("bad magic 0x%x != 0x%x", magic,
 		    SSH_COM_PRIVATE_KEY_MAGIC);
 		return NULL;
 	}
 	if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
 	    (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
 	    (r = sshbuf_get_u32(b, &i2)) != 0 ||
 	    (r = sshbuf_get_u32(b, &i3)) != 0 ||
 	    (r = sshbuf_get_u32(b, &i4)) != 0)
 		fatal_fr(r, "parse");
 	debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
 	if (strcmp(cipher, "none") != 0) {
 		error("unsupported cipher %s", cipher);
 		free(cipher);
 		free(type);
 		return NULL;
 	}
 	free(cipher);
 
-	if (strstr(type, "dsa")) {
-		ktype = KEY_DSA;
-	} else if (strstr(type, "rsa")) {
+	if (strstr(type, "rsa")) {
 		ktype = KEY_RSA;
+#ifdef WITH_DSA
+	} else if (strstr(type, "dsa")) {
+		ktype = KEY_DSA;
+#endif
 	} else {
 		free(type);
 		return NULL;
 	}
 	if ((key = sshkey_new(ktype)) == NULL)
 		fatal("sshkey_new failed");
 	free(type);
 
 	switch (key->type) {
+#ifdef WITH_DSA
 	case KEY_DSA:
 		if ((dsa_p = BN_new()) == NULL ||
 		    (dsa_q = BN_new()) == NULL ||
 		    (dsa_g = BN_new()) == NULL ||
 		    (dsa_pub_key = BN_new()) == NULL ||
 		    (dsa_priv_key = BN_new()) == NULL)
 			fatal_f("BN_new");
 		buffer_get_bignum_bits(b, dsa_p);
 		buffer_get_bignum_bits(b, dsa_g);
 		buffer_get_bignum_bits(b, dsa_q);
 		buffer_get_bignum_bits(b, dsa_pub_key);
 		buffer_get_bignum_bits(b, dsa_priv_key);
 		if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
 			fatal_f("DSA_set0_pqg failed");
 		dsa_p = dsa_q = dsa_g = NULL; /* transferred */
 		if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
 			fatal_f("DSA_set0_key failed");
 		dsa_pub_key = dsa_priv_key = NULL; /* transferred */
 		break;
+#endif
 	case KEY_RSA:
 		if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
 		    (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
 		    (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
 			fatal_fr(r, "parse RSA");
 		e = e1;
 		debug("e %lx", e);
 		if (e < 30) {
 			e <<= 8;
 			e += e2;
 			debug("e %lx", e);
 			e <<= 8;
 			e += e3;
 			debug("e %lx", e);
 		}
 		if ((rsa_e = BN_new()) == NULL)
 			fatal_f("BN_new");
 		if (!BN_set_word(rsa_e, e)) {
 			BN_clear_free(rsa_e);
 			sshkey_free(key);
 			return NULL;
 		}
 		if ((rsa_n = BN_new()) == NULL ||
 		    (rsa_d = BN_new()) == NULL ||
 		    (rsa_p = BN_new()) == NULL ||
 		    (rsa_q = BN_new()) == NULL ||
 		    (rsa_iqmp = BN_new()) == NULL)
 			fatal_f("BN_new");
 		buffer_get_bignum_bits(b, rsa_d);
 		buffer_get_bignum_bits(b, rsa_n);
 		buffer_get_bignum_bits(b, rsa_iqmp);
 		buffer_get_bignum_bits(b, rsa_q);
 		buffer_get_bignum_bits(b, rsa_p);
 		if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
 			fatal_f("RSA_set0_key failed");
 		rsa_n = rsa_e = rsa_d = NULL; /* transferred */
 		if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
 			fatal_f("RSA_set0_factors failed");
 		rsa_p = rsa_q = NULL; /* transferred */
 		if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
 			fatal_fr(r, "generate RSA parameters");
 		BN_clear_free(rsa_iqmp);
 		alg = "rsa-sha2-256";
 		break;
 	}
 	rlen = sshbuf_len(b);
 	if (rlen != 0)
 		error_f("remaining bytes in key blob %d", rlen);
 
 	/* try the key */
 	if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data),
 	    alg, NULL, NULL, 0)) != 0)
 		error_fr(r, "signing with converted key failed");
 	else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
 	    alg, 0, NULL)) != 0)
 		error_fr(r, "verification with converted key failed");
 	if (r != 0) {
 		sshkey_free(key);
 		free(sig);
 		return NULL;
 	}
 	free(sig);
 	return key;
 }
 
 static int
 get_line(FILE *fp, char *line, size_t len)
 {
 	int c;
 	size_t pos = 0;
 
 	line[0] = '\0';
 	while ((c = fgetc(fp)) != EOF) {
 		if (pos >= len - 1)
 			fatal("input line too long.");
 		switch (c) {
 		case '\r':
 			c = fgetc(fp);
 			if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
 				fatal("unget: %s", strerror(errno));
 			return pos;
 		case '\n':
 			return pos;
 		}
 		line[pos++] = c;
 		line[pos] = '\0';
 	}
 	/* We reached EOF */
 	return -1;
 }
 
 static void
 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
 {
 	int r, blen, escaped = 0;
 	u_int len;
 	char line[1024];
 	struct sshbuf *buf;
 	char encoded[8096];
 	FILE *fp;
 
 	if ((buf = sshbuf_new()) == NULL)
 		fatal("sshbuf_new failed");
 	if ((fp = fopen(identity_file, "r")) == NULL)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 	encoded[0] = '\0';
 	while ((blen = get_line(fp, line, sizeof(line))) != -1) {
 		if (blen > 0 && line[blen - 1] == '\\')
 			escaped++;
 		if (strncmp(line, "----", 4) == 0 ||
 		    strstr(line, ": ") != NULL) {
 			if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
 				*private = 1;
 			if (strstr(line, " END ") != NULL) {
 				break;
 			}
 			/* fprintf(stderr, "ignore: %s", line); */
 			continue;
 		}
 		if (escaped) {
 			escaped--;
 			/* fprintf(stderr, "escaped: %s", line); */
 			continue;
 		}
 		strlcat(encoded, line, sizeof(encoded));
 	}
 	len = strlen(encoded);
 	if (((len % 4) == 3) &&
 	    (encoded[len-1] == '=') &&
 	    (encoded[len-2] == '=') &&
 	    (encoded[len-3] == '='))
 		encoded[len-3] = '\0';
 	if ((r = sshbuf_b64tod(buf, encoded)) != 0)
 		fatal_fr(r, "base64 decode");
 	if (*private) {
 		if ((*k = do_convert_private_ssh2(buf)) == NULL)
 			fatal_f("private key conversion failed");
 	} else if ((r = sshkey_fromb(buf, k)) != 0)
 		fatal_fr(r, "parse key");
 	sshbuf_free(buf);
 	fclose(fp);
 }
 
 static void
 do_convert_from_pkcs8(struct sshkey **k, int *private)
 {
 	EVP_PKEY *pubkey;
 	FILE *fp;
 
 	if ((fp = fopen(identity_file, "r")) == NULL)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 	if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
 		fatal_f("%s is not a recognised public key format",
 		    identity_file);
 	}
 	fclose(fp);
 	switch (EVP_PKEY_base_id(pubkey)) {
 	case EVP_PKEY_RSA:
 		if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal("sshkey_new failed");
 		(*k)->type = KEY_RSA;
 		(*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
 		break;
+#ifdef WITH_DSA
 	case EVP_PKEY_DSA:
 		if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal("sshkey_new failed");
 		(*k)->type = KEY_DSA;
 		(*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
 		break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 	case EVP_PKEY_EC:
 		if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal("sshkey_new failed");
 		(*k)->type = KEY_ECDSA;
 		(*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
 		(*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
 		break;
 #endif
 	default:
 		fatal_f("unsupported pubkey type %d",
 		    EVP_PKEY_base_id(pubkey));
 	}
 	EVP_PKEY_free(pubkey);
 	return;
 }
 
 static void
 do_convert_from_pem(struct sshkey **k, int *private)
 {
 	FILE *fp;
 	RSA *rsa;
 
 	if ((fp = fopen(identity_file, "r")) == NULL)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 	if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
 		if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal("sshkey_new failed");
 		(*k)->type = KEY_RSA;
 		(*k)->rsa = rsa;
 		fclose(fp);
 		return;
 	}
 	fatal_f("unrecognised raw private key format");
 }
 
 static void
 do_convert_from(struct passwd *pw)
 {
 	struct sshkey *k = NULL;
 	int r, private = 0, ok = 0;
 	struct stat st;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 
 	switch (convert_format) {
 	case FMT_RFC4716:
 		do_convert_from_ssh2(pw, &k, &private);
 		break;
 	case FMT_PKCS8:
 		do_convert_from_pkcs8(&k, &private);
 		break;
 	case FMT_PEM:
 		do_convert_from_pem(&k, &private);
 		break;
 	default:
 		fatal_f("unknown key format %d", convert_format);
 	}
 
 	if (!private) {
 		if ((r = sshkey_write(k, stdout)) == 0)
 			ok = 1;
 		if (ok)
 			fprintf(stdout, "\n");
 	} else {
 		switch (k->type) {
+#ifdef WITH_DSA
 		case KEY_DSA:
 			ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
 			    NULL, 0, NULL, NULL);
 			break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 		case KEY_ECDSA:
 			ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
 			    NULL, 0, NULL, NULL);
 			break;
 #endif
 		case KEY_RSA:
 			ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
 			    NULL, 0, NULL, NULL);
 			break;
 		default:
 			fatal_f("unsupported key type %s", sshkey_type(k));
 		}
 	}
 
 	if (!ok)
 		fatal("key write failed");
 	sshkey_free(k);
 	exit(0);
 }
 #endif
 
 static void
 do_print_public(struct passwd *pw)
 {
 	struct sshkey *prv;
 	struct stat st;
 	int r;
 	char *comment = NULL;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s", identity_file, strerror(errno));
 	prv = load_identity(identity_file, &comment);
 	if ((r = sshkey_write(prv, stdout)) != 0)
 		fatal_fr(r, "write key");
 	if (comment != NULL && *comment != '\0')
 		fprintf(stdout, " %s", comment);
 	fprintf(stdout, "\n");
 	if (sshkey_is_sk(prv)) {
 		debug("sk_application: \"%s\", sk_flags 0x%02x",
 			prv->sk_application, prv->sk_flags);
 	}
 	sshkey_free(prv);
 	free(comment);
 	exit(0);
 }
 
 static void
 do_download(struct passwd *pw)
 {
 #ifdef ENABLE_PKCS11
 	struct sshkey **keys = NULL;
 	int i, nkeys;
 	enum sshkey_fp_rep rep;
 	int fptype;
 	char *fp, *ra, **comments = NULL;
 
 	fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
 	rep =    print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
 
 	pkcs11_init(1);
 	nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);
 	if (nkeys <= 0)
 		fatal("cannot read public key from pkcs11");
 	for (i = 0; i < nkeys; i++) {
 		if (print_fingerprint) {
 			fp = sshkey_fingerprint(keys[i], fptype, rep);
 			ra = sshkey_fingerprint(keys[i], fingerprint_hash,
 			    SSH_FP_RANDOMART);
 			if (fp == NULL || ra == NULL)
 				fatal_f("sshkey_fingerprint fail");
 			printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
 			    fp, sshkey_type(keys[i]));
 			if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
 				printf("%s\n", ra);
 			free(ra);
 			free(fp);
 		} else {
 			(void) sshkey_write(keys[i], stdout); /* XXX check */
 			fprintf(stdout, "%s%s\n",
 			    *(comments[i]) == '\0' ? "" : " ", comments[i]);
 		}
 		free(comments[i]);
 		sshkey_free(keys[i]);
 	}
 	free(comments);
 	free(keys);
 	pkcs11_terminate();
 	exit(0);
 #else
 	fatal("no pkcs11 support");
 #endif /* ENABLE_PKCS11 */
 }
 
 static struct sshkey *
 try_read_key(char **cpp)
 {
 	struct sshkey *ret;
 	int r;
 
 	if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
 		fatal("sshkey_new failed");
 	if ((r = sshkey_read(ret, cpp)) == 0)
 		return ret;
 	/* Not a key */
 	sshkey_free(ret);
 	return NULL;
 }
 
 static void
 fingerprint_one_key(const struct sshkey *public, const char *comment)
 {
 	char *fp = NULL, *ra = NULL;
 	enum sshkey_fp_rep rep;
 	int fptype;
 
 	fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
 	rep =    print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
 	fp = sshkey_fingerprint(public, fptype, rep);
 	ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
 	if (fp == NULL || ra == NULL)
 		fatal_f("sshkey_fingerprint failed");
 	mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
 	    comment ? comment : "no comment", sshkey_type(public));
 	if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
 		printf("%s\n", ra);
 	free(ra);
 	free(fp);
 }
 
 static void
 fingerprint_private(const char *path)
 {
 	struct stat st;
 	char *comment = NULL;
 	struct sshkey *privkey = NULL, *pubkey = NULL;
 	int r;
 
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s", path, strerror(errno));
 	if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)
 		debug_r(r, "load public \"%s\"", path);
 	if (pubkey == NULL || comment == NULL || *comment == '\0') {
 		free(comment);
 		if ((r = sshkey_load_private(path, NULL,
 		    &privkey, &comment)) != 0)
 			debug_r(r, "load private \"%s\"", path);
 	}
 	if (pubkey == NULL && privkey == NULL)
 		fatal("%s is not a key file.", path);
 
 	fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);
 	sshkey_free(pubkey);
 	sshkey_free(privkey);
 	free(comment);
 }
 
 static void
 do_fingerprint(struct passwd *pw)
 {
 	FILE *f;
 	struct sshkey *public = NULL;
 	char *comment = NULL, *cp, *ep, *line = NULL;
 	size_t linesize = 0;
 	int i, invalid = 1;
 	const char *path;
 	u_long lnum = 0;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	path = identity_file;
 
 	if (strcmp(identity_file, "-") == 0) {
 		f = stdin;
 		path = "(stdin)";
 	} else if ((f = fopen(path, "r")) == NULL)
 		fatal("%s: %s: %s", __progname, path, strerror(errno));
 
 	while (getline(&line, &linesize, f) != -1) {
 		lnum++;
 		cp = line;
 		cp[strcspn(cp, "\n")] = '\0';
 		/* Trim leading space and comments */
 		cp = line + strspn(line, " \t");
 		if (*cp == '#' || *cp == '\0')
 			continue;
 
 		/*
 		 * Input may be plain keys, private keys, authorized_keys
 		 * or known_hosts.
 		 */
 
 		/*
 		 * Try private keys first. Assume a key is private if
 		 * "SSH PRIVATE KEY" appears on the first line and we're
 		 * not reading from stdin (XXX support private keys on stdin).
 		 */
 		if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
 		    strstr(cp, "PRIVATE KEY") != NULL) {
 			free(line);
 			fclose(f);
 			fingerprint_private(path);
 			exit(0);
 		}
 
 		/*
 		 * If it's not a private key, then this must be prepared to
 		 * accept a public key prefixed with a hostname or options.
 		 * Try a bare key first, otherwise skip the leading stuff.
 		 */
 		comment = NULL;
 		if ((public = try_read_key(&cp)) == NULL) {
 			i = strtol(cp, &ep, 10);
 			if (i == 0 || ep == NULL ||
 			    (*ep != ' ' && *ep != '\t')) {
 				int quoted = 0;
 
 				comment = cp;
 				for (; *cp && (quoted || (*cp != ' ' &&
 				    *cp != '\t')); cp++) {
 					if (*cp == '\\' && cp[1] == '"')
 						cp++;	/* Skip both */
 					else if (*cp == '"')
 						quoted = !quoted;
 				}
 				if (!*cp)
 					continue;
 				*cp++ = '\0';
 			}
 		}
 		/* Retry after parsing leading hostname/key options */
 		if (public == NULL && (public = try_read_key(&cp)) == NULL) {
 			debug("%s:%lu: not a public key", path, lnum);
 			continue;
 		}
 
 		/* Find trailing comment, if any */
 		for (; *cp == ' ' || *cp == '\t'; cp++)
 			;
 		if (*cp != '\0' && *cp != '#')
 			comment = cp;
 
 		fingerprint_one_key(public, comment);
 		sshkey_free(public);
 		invalid = 0; /* One good key in the file is sufficient */
 	}
 	fclose(f);
 	free(line);
 
 	if (invalid)
 		fatal("%s is not a public key file.", path);
 	exit(0);
 }
 
 static void
 do_gen_all_hostkeys(struct passwd *pw)
 {
 	struct {
 		char *key_type;
 		char *key_type_display;
 		char *path;
 	} key_types[] = {
 #ifdef WITH_OPENSSL
 		{ "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
 #ifdef OPENSSL_HAS_ECC
 		{ "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 		{ "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
 #ifdef WITH_XMSS
 		{ "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
 #endif /* WITH_XMSS */
 		{ NULL, NULL, NULL }
 	};
 
 	u_int32_t bits = 0;
 	int first = 0;
 	struct stat st;
 	struct sshkey *private, *public;
 	char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
 	int i, type, fd, r;
 
 	for (i = 0; key_types[i].key_type; i++) {
 		public = private = NULL;
 		prv_tmp = pub_tmp = prv_file = pub_file = NULL;
 
 		xasprintf(&prv_file, "%s%s",
 		    identity_file, key_types[i].path);
 
 		/* Check whether private key exists and is not zero-length */
 		if (stat(prv_file, &st) == 0) {
 			if (st.st_size != 0)
 				goto next;
 		} else if (errno != ENOENT) {
 			error("Could not stat %s: %s", key_types[i].path,
 			    strerror(errno));
 			goto failnext;
 		}
 
 		/*
 		 * Private key doesn't exist or is invalid; proceed with
 		 * key generation.
 		 */
 		xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
 		    identity_file, key_types[i].path);
 		xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
 		    identity_file, key_types[i].path);
 		xasprintf(&pub_file, "%s%s.pub",
 		    identity_file, key_types[i].path);
 
 		if (first == 0) {
 			first = 1;
 			printf("%s: generating new host keys: ", __progname);
 		}
 		printf("%s ", key_types[i].key_type_display);
 		fflush(stdout);
 		type = sshkey_type_from_name(key_types[i].key_type);
 		if ((fd = mkstemp(prv_tmp)) == -1) {
 			error("Could not save your private key in %s: %s",
 			    prv_tmp, strerror(errno));
 			goto failnext;
 		}
 		(void)close(fd); /* just using mkstemp() to reserve a name */
 		bits = 0;
 		type_bits_valid(type, NULL, &bits);
 		if ((r = sshkey_generate(type, bits, &private)) != 0) {
 			error_r(r, "sshkey_generate failed");
 			goto failnext;
 		}
 		if ((r = sshkey_from_private(private, &public)) != 0)
 			fatal_fr(r, "sshkey_from_private");
 		snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
 		    hostname);
 		if ((r = sshkey_save_private(private, prv_tmp, "",
 		    comment, private_key_format, openssh_format_cipher,
 		    rounds)) != 0) {
 			error_r(r, "Saving key \"%s\" failed", prv_tmp);
 			goto failnext;
 		}
 		if ((fd = mkstemp(pub_tmp)) == -1) {
 			error("Could not save your public key in %s: %s",
 			    pub_tmp, strerror(errno));
 			goto failnext;
 		}
 		(void)fchmod(fd, 0644);
 		(void)close(fd);
 		if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {
 			error_r(r, "Unable to save public key to %s",
 			    identity_file);
 			goto failnext;
 		}
 
 		/* Rename temporary files to their permanent locations. */
 		if (rename(pub_tmp, pub_file) != 0) {
 			error("Unable to move %s into position: %s",
 			    pub_file, strerror(errno));
 			goto failnext;
 		}
 		if (rename(prv_tmp, prv_file) != 0) {
 			error("Unable to move %s into position: %s",
 			    key_types[i].path, strerror(errno));
  failnext:
 			first = 0;
 			goto next;
 		}
  next:
 		sshkey_free(private);
 		sshkey_free(public);
 		free(prv_tmp);
 		free(pub_tmp);
 		free(prv_file);
 		free(pub_file);
 	}
 	if (first != 0)
 		printf("\n");
 }
 
 struct known_hosts_ctx {
 	const char *host;	/* Hostname searched for in find/delete case */
 	FILE *out;		/* Output file, stdout for find_hosts case */
 	int has_unhashed;	/* When hashing, original had unhashed hosts */
 	int found_key;		/* For find/delete, host was found */
 	int invalid;		/* File contained invalid items; don't delete */
 	int hash_hosts;		/* Hash hostnames as we go */
 	int find_host;		/* Search for specific hostname */
 	int delete_host;	/* Delete host from known_hosts */
 };
 
 static int
 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
 	char *hashed, *cp, *hosts, *ohosts;
 	int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
 	int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
 
 	switch (l->status) {
 	case HKF_STATUS_OK:
 	case HKF_STATUS_MATCHED:
 		/*
 		 * Don't hash hosts already hashed, with wildcard
 		 * characters or a CA/revocation marker.
 		 */
 		if (was_hashed || has_wild || l->marker != MRK_NONE) {
 			fprintf(ctx->out, "%s\n", l->line);
 			if (has_wild && !ctx->find_host) {
 				logit("%s:%lu: ignoring host name "
 				    "with wildcard: %.64s", l->path,
 				    l->linenum, l->hosts);
 			}
 			return 0;
 		}
 		/*
 		 * Split any comma-separated hostnames from the host list,
 		 * hash and store separately.
 		 */
 		ohosts = hosts = xstrdup(l->hosts);
 		while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
 			lowercase(cp);
 			if ((hashed = host_hash(cp, NULL, 0)) == NULL)
 				fatal("hash_host failed");
 			fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
 			free(hashed);
 			ctx->has_unhashed = 1;
 		}
 		free(ohosts);
 		return 0;
 	case HKF_STATUS_INVALID:
 		/* Retain invalid lines, but mark file as invalid. */
 		ctx->invalid = 1;
 		logit("%s:%lu: invalid line", l->path, l->linenum);
 		/* FALLTHROUGH */
 	default:
 		fprintf(ctx->out, "%s\n", l->line);
 		return 0;
 	}
 	/* NOTREACHED */
 	return -1;
 }
 
 static int
 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
 	enum sshkey_fp_rep rep;
 	int fptype;
 	char *fp = NULL, *ra = NULL;
 
 	fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
 	rep =    print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
 
 	if (l->status == HKF_STATUS_MATCHED) {
 		if (ctx->delete_host) {
 			if (l->marker != MRK_NONE) {
 				/* Don't remove CA and revocation lines */
 				fprintf(ctx->out, "%s\n", l->line);
 			} else {
 				/*
 				 * Hostname matches and has no CA/revoke
 				 * marker, delete it by *not* writing the
 				 * line to ctx->out.
 				 */
 				ctx->found_key = 1;
 				if (!quiet)
 					printf("# Host %s found: line %lu\n",
 					    ctx->host, l->linenum);
 			}
 			return 0;
 		} else if (ctx->find_host) {
 			ctx->found_key = 1;
 			if (!quiet) {
 				printf("# Host %s found: line %lu %s\n",
 				    ctx->host,
 				    l->linenum, l->marker == MRK_CA ? "CA" :
 				    (l->marker == MRK_REVOKE ? "REVOKED" : ""));
 			}
 			if (ctx->hash_hosts)
 				known_hosts_hash(l, ctx);
 			else if (print_fingerprint) {
 				fp = sshkey_fingerprint(l->key, fptype, rep);
 				ra = sshkey_fingerprint(l->key,
 				    fingerprint_hash, SSH_FP_RANDOMART);
 				if (fp == NULL || ra == NULL)
 					fatal_f("sshkey_fingerprint failed");
 				mprintf("%s %s %s%s%s\n", ctx->host,
 				    sshkey_type(l->key), fp,
 				    l->comment[0] ? " " : "",
 				    l->comment);
 				if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
 					printf("%s\n", ra);
 				free(ra);
 				free(fp);
 			} else
 				fprintf(ctx->out, "%s\n", l->line);
 			return 0;
 		}
 	} else if (ctx->delete_host) {
 		/* Retain non-matching hosts when deleting */
 		if (l->status == HKF_STATUS_INVALID) {
 			ctx->invalid = 1;
 			logit("%s:%lu: invalid line", l->path, l->linenum);
 		}
 		fprintf(ctx->out, "%s\n", l->line);
 	}
 	return 0;
 }
 
 static void
 do_known_hosts(struct passwd *pw, const char *name, int find_host,
     int delete_host, int hash_hosts)
 {
 	char *cp, tmp[PATH_MAX], old[PATH_MAX];
 	int r, fd, oerrno, inplace = 0;
 	struct known_hosts_ctx ctx;
 	u_int foreach_options;
 	struct stat sb;
 
 	if (!have_identity) {
 		cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
 		if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
 		    sizeof(identity_file))
 			fatal("Specified known hosts path too long");
 		free(cp);
 		have_identity = 1;
 	}
 	if (stat(identity_file, &sb) != 0)
 		fatal("Cannot stat %s: %s", identity_file, strerror(errno));
 
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.out = stdout;
 	ctx.host = name;
 	ctx.hash_hosts = hash_hosts;
 	ctx.find_host = find_host;
 	ctx.delete_host = delete_host;
 
 	/*
 	 * Find hosts goes to stdout, hash and deletions happen in-place
 	 * A corner case is ssh-keygen -HF foo, which should go to stdout
 	 */
 	if (!find_host && (hash_hosts || delete_host)) {
 		if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
 		    strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
 		    strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
 		    strlcat(old, ".old", sizeof(old)) >= sizeof(old))
 			fatal("known_hosts path too long");
 		umask(077);
 		if ((fd = mkstemp(tmp)) == -1)
 			fatal("mkstemp: %s", strerror(errno));
 		if ((ctx.out = fdopen(fd, "w")) == NULL) {
 			oerrno = errno;
 			unlink(tmp);
 			fatal("fdopen: %s", strerror(oerrno));
 		}
 		(void)fchmod(fd, sb.st_mode & 0644);
 		inplace = 1;
 	}
 	/* XXX support identity_file == "-" for stdin */
 	foreach_options = find_host ? HKF_WANT_MATCH : 0;
 	foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
 	if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
 	    known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
 	    foreach_options, 0)) != 0) {
 		if (inplace)
 			unlink(tmp);
 		fatal_fr(r, "hostkeys_foreach");
 	}
 
 	if (inplace)
 		fclose(ctx.out);
 
 	if (ctx.invalid) {
 		error("%s is not a valid known_hosts file.", identity_file);
 		if (inplace) {
 			error("Not replacing existing known_hosts "
 			    "file because of errors");
 			unlink(tmp);
 		}
 		exit(1);
 	} else if (delete_host && !ctx.found_key) {
 		logit("Host %s not found in %s", name, identity_file);
 		if (inplace)
 			unlink(tmp);
 	} else if (inplace) {
 		/* Backup existing file */
 		if (unlink(old) == -1 && errno != ENOENT)
 			fatal("unlink %.100s: %s", old, strerror(errno));
 		if (link(identity_file, old) == -1)
 			fatal("link %.100s to %.100s: %s", identity_file, old,
 			    strerror(errno));
 		/* Move new one into place */
 		if (rename(tmp, identity_file) == -1) {
 			error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
 			    strerror(errno));
 			unlink(tmp);
 			unlink(old);
 			exit(1);
 		}
 
 		printf("%s updated.\n", identity_file);
 		printf("Original contents retained as %s\n", old);
 		if (ctx.has_unhashed) {
 			logit("WARNING: %s contains unhashed entries", old);
 			logit("Delete this file to ensure privacy "
 			    "of hostnames");
 		}
 	}
 
 	exit (find_host && !ctx.found_key);
 }
 
 /*
  * Perform changing a passphrase.  The argument is the passwd structure
  * for the current user.
  */
 static void
 do_change_passphrase(struct passwd *pw)
 {
 	char *comment;
 	char *old_passphrase, *passphrase1, *passphrase2;
 	struct stat st;
 	struct sshkey *private;
 	int r;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s", identity_file, strerror(errno));
 	/* Try to load the file with empty passphrase. */
 	r = sshkey_load_private(identity_file, "", &private, &comment);
 	if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
 		if (identity_passphrase)
 			old_passphrase = xstrdup(identity_passphrase);
 		else
 			old_passphrase =
 			    read_passphrase("Enter old passphrase: ",
 			    RP_ALLOW_STDIN);
 		r = sshkey_load_private(identity_file, old_passphrase,
 		    &private, &comment);
 		freezero(old_passphrase, strlen(old_passphrase));
 		if (r != 0)
 			goto badkey;
 	} else if (r != 0) {
  badkey:
 		fatal_r(r, "Failed to load key %s", identity_file);
 	}
 	if (comment)
 		mprintf("Key has comment '%s'\n", comment);
 
 	/* Ask the new passphrase (twice). */
 	if (identity_new_passphrase) {
 		passphrase1 = xstrdup(identity_new_passphrase);
 		passphrase2 = NULL;
 	} else {
 		passphrase1 =
 			read_passphrase("Enter new passphrase (empty for no "
 			    "passphrase): ", RP_ALLOW_STDIN);
 		passphrase2 = read_passphrase("Enter same passphrase again: ",
 		    RP_ALLOW_STDIN);
 
 		/* Verify that they are the same. */
 		if (strcmp(passphrase1, passphrase2) != 0) {
 			explicit_bzero(passphrase1, strlen(passphrase1));
 			explicit_bzero(passphrase2, strlen(passphrase2));
 			free(passphrase1);
 			free(passphrase2);
 			printf("Pass phrases do not match.  Try again.\n");
 			exit(1);
 		}
 		/* Destroy the other copy. */
 		freezero(passphrase2, strlen(passphrase2));
 	}
 
 	/* Save the file using the new passphrase. */
 	if ((r = sshkey_save_private(private, identity_file, passphrase1,
 	    comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
 		error_r(r, "Saving key \"%s\" failed", identity_file);
 		freezero(passphrase1, strlen(passphrase1));
 		sshkey_free(private);
 		free(comment);
 		exit(1);
 	}
 	/* Destroy the passphrase and the copy of the key in memory. */
 	freezero(passphrase1, strlen(passphrase1));
 	sshkey_free(private);		 /* Destroys contents */
 	free(comment);
 
 	printf("Your identification has been saved with the new passphrase.\n");
 	exit(0);
 }
 
 /*
  * Print the SSHFP RR.
  */
 static int
 do_print_resource_record(struct passwd *pw, char *fname, char *hname,
     int print_generic, char * const *opts, size_t nopts)
 {
 	struct sshkey *public;
 	char *comment = NULL;
 	struct stat st;
 	int r, hash = -1;
 	size_t i;
 
 	for (i = 0; i < nopts; i++) {
 		if (strncasecmp(opts[i], "hashalg=", 8) == 0) {
 			if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1)
 				fatal("Unsupported hash algorithm");
 		} else {
 			error("Invalid option \"%s\"", opts[i]);
 			return SSH_ERR_INVALID_ARGUMENT;
 		}
 	}
 	if (fname == NULL)
 		fatal_f("no filename");
 	if (stat(fname, &st) == -1) {
 		if (errno == ENOENT)
 			return 0;
 		fatal("%s: %s", fname, strerror(errno));
 	}
 	if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
 		fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);
 	export_dns_rr(hname, public, stdout, print_generic, hash);
 	sshkey_free(public);
 	free(comment);
 	return 1;
 }
 
 /*
  * Change the comment of a private key file.
  */
 static void
 do_change_comment(struct passwd *pw, const char *identity_comment)
 {
 	char new_comment[1024], *comment, *passphrase;
 	struct sshkey *private;
 	struct sshkey *public;
 	struct stat st;
 	int r;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (stat(identity_file, &st) == -1)
 		fatal("%s: %s", identity_file, strerror(errno));
 	if ((r = sshkey_load_private(identity_file, "",
 	    &private, &comment)) == 0)
 		passphrase = xstrdup("");
 	else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
 		fatal_r(r, "Cannot load private key \"%s\"", identity_file);
 	else {
 		if (identity_passphrase)
 			passphrase = xstrdup(identity_passphrase);
 		else if (identity_new_passphrase)
 			passphrase = xstrdup(identity_new_passphrase);
 		else
 			passphrase = read_passphrase("Enter passphrase: ",
 			    RP_ALLOW_STDIN);
 		/* Try to load using the passphrase. */
 		if ((r = sshkey_load_private(identity_file, passphrase,
 		    &private, &comment)) != 0) {
 			freezero(passphrase, strlen(passphrase));
 			fatal_r(r, "Cannot load private key \"%s\"",
 			    identity_file);
 		}
 	}
 
 	if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
 	    private_key_format != SSHKEY_PRIVATE_OPENSSH) {
 		error("Comments are only supported for keys stored in "
 		    "the new format (-o).");
 		explicit_bzero(passphrase, strlen(passphrase));
 		sshkey_free(private);
 		exit(1);
 	}
 	if (comment)
 		printf("Old comment: %s\n", comment);
 	else
 		printf("No existing comment\n");
 
 	if (identity_comment) {
 		strlcpy(new_comment, identity_comment, sizeof(new_comment));
 	} else {
 		printf("New comment: ");
 		fflush(stdout);
 		if (!fgets(new_comment, sizeof(new_comment), stdin)) {
 			explicit_bzero(passphrase, strlen(passphrase));
 			sshkey_free(private);
 			exit(1);
 		}
 		new_comment[strcspn(new_comment, "\n")] = '\0';
 	}
 	if (comment != NULL && strcmp(comment, new_comment) == 0) {
 		printf("No change to comment\n");
 		free(passphrase);
 		sshkey_free(private);
 		free(comment);
 		exit(0);
 	}
 
 	/* Save the file using the new passphrase. */
 	if ((r = sshkey_save_private(private, identity_file, passphrase,
 	    new_comment, private_key_format, openssh_format_cipher,
 	    rounds)) != 0) {
 		error_r(r, "Saving key \"%s\" failed", identity_file);
 		freezero(passphrase, strlen(passphrase));
 		sshkey_free(private);
 		free(comment);
 		exit(1);
 	}
 	freezero(passphrase, strlen(passphrase));
 	if ((r = sshkey_from_private(private, &public)) != 0)
 		fatal_fr(r, "sshkey_from_private");
 	sshkey_free(private);
 
 	strlcat(identity_file, ".pub", sizeof(identity_file));
 	if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)
 		fatal_r(r, "Unable to save public key to %s", identity_file);
 	sshkey_free(public);
 	free(comment);
 
 	if (strlen(new_comment) > 0)
 		printf("Comment '%s' applied\n", new_comment);
 	else
 		printf("Comment removed\n");
 
 	exit(0);
 }
 
 static void
 cert_ext_add(const char *key, const char *value, int iscrit)
 {
 	cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));
 	cert_ext[ncert_ext].key = xstrdup(key);
 	cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);
 	cert_ext[ncert_ext].crit = iscrit;
 	ncert_ext++;
 }
 
 /* qsort(3) comparison function for certificate extensions */
 static int
 cert_ext_cmp(const void *_a, const void *_b)
 {
 	const struct cert_ext *a = (const struct cert_ext *)_a;
 	const struct cert_ext *b = (const struct cert_ext *)_b;
 	int r;
 
 	if (a->crit != b->crit)
 		return (a->crit < b->crit) ? -1 : 1;
 	if ((r = strcmp(a->key, b->key)) != 0)
 		return r;
 	if ((a->val == NULL) != (b->val == NULL))
 		return (a->val == NULL) ? -1 : 1;
 	if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)
 		return r;
 	return 0;
 }
 
 #define OPTIONS_CRITICAL	1
 #define OPTIONS_EXTENSIONS	2
 static void
 prepare_options_buf(struct sshbuf *c, int which)
 {
 	struct sshbuf *b;
 	size_t i;
 	int r;
 	const struct cert_ext *ext;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	sshbuf_reset(c);
 	for (i = 0; i < ncert_ext; i++) {
 		ext = &cert_ext[i];
 		if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||
 		    (!ext->crit && (which & OPTIONS_CRITICAL)))
 			continue;
 		if (ext->val == NULL) {
 			/* flag option */
 			debug3_f("%s", ext->key);
 			if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
 			    (r = sshbuf_put_string(c, NULL, 0)) != 0)
 				fatal_fr(r, "prepare flag");
 		} else {
 			/* key/value option */
 			debug3_f("%s=%s", ext->key, ext->val);
 			sshbuf_reset(b);
 			if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
 			    (r = sshbuf_put_cstring(b, ext->val)) != 0 ||
 			    (r = sshbuf_put_stringb(c, b)) != 0)
 				fatal_fr(r, "prepare k/v");
 		}
 	}
 	sshbuf_free(b);
 }
 
 static void
 finalise_cert_exts(void)
 {
 	/* critical options */
 	if (certflags_command != NULL)
 		cert_ext_add("force-command", certflags_command, 1);
 	if (certflags_src_addr != NULL)
 		cert_ext_add("source-address", certflags_src_addr, 1);
 	if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0)
 		cert_ext_add("verify-required", NULL, 1);
 	/* extensions */
 	if ((certflags_flags & CERTOPT_X_FWD) != 0)
 		cert_ext_add("permit-X11-forwarding", NULL, 0);
 	if ((certflags_flags & CERTOPT_AGENT_FWD) != 0)
 		cert_ext_add("permit-agent-forwarding", NULL, 0);
 	if ((certflags_flags & CERTOPT_PORT_FWD) != 0)
 		cert_ext_add("permit-port-forwarding", NULL, 0);
 	if ((certflags_flags & CERTOPT_PTY) != 0)
 		cert_ext_add("permit-pty", NULL, 0);
 	if ((certflags_flags & CERTOPT_USER_RC) != 0)
 		cert_ext_add("permit-user-rc", NULL, 0);
 	if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
 		cert_ext_add("no-touch-required", NULL, 0);
 	/* order lexically by key */
 	if (ncert_ext > 0)
 		qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp);
 }
 
 static struct sshkey *
 load_pkcs11_key(char *path)
 {
 #ifdef ENABLE_PKCS11
 	struct sshkey **keys = NULL, *public, *private = NULL;
 	int r, i, nkeys;
 
 	if ((r = sshkey_load_public(path, &public, NULL)) != 0)
 		fatal_r(r, "Couldn't load CA public key \"%s\"", path);
 
 	nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,
 	    &keys, NULL);
 	debug3_f("%d keys", nkeys);
 	if (nkeys <= 0)
 		fatal("cannot read public key from pkcs11");
 	for (i = 0; i < nkeys; i++) {
 		if (sshkey_equal_public(public, keys[i])) {
 			private = keys[i];
 			continue;
 		}
 		sshkey_free(keys[i]);
 	}
 	free(keys);
 	sshkey_free(public);
 	return private;
 #else
 	fatal("no pkcs11 support");
 #endif /* ENABLE_PKCS11 */
 }
 
 /* Signer for sshkey_certify_custom that uses the agent */
 static int
 agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen,
     const char *alg, const char *provider, const char *pin,
     u_int compat, void *ctx)
 {
 	int *agent_fdp = (int *)ctx;
 
 	return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
 	    data, datalen, alg, compat);
 }
 
 static void
 do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
     unsigned long long cert_serial, int cert_serial_autoinc,
     int argc, char **argv)
 {
 	int r, i, found, agent_fd = -1;
 	u_int n;
 	struct sshkey *ca, *public;
 	char valid[64], *otmp, *tmp, *cp, *out, *comment;
 	char *ca_fp = NULL, **plist = NULL, *pin = NULL;
 	struct ssh_identitylist *agent_ids;
 	size_t j;
 	struct notifier_ctx *notifier = NULL;
 
 #ifdef ENABLE_PKCS11
 	pkcs11_init(1);
 #endif
 	tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
 	if (pkcs11provider != NULL) {
 		/* If a PKCS#11 token was specified then try to use it */
 		if ((ca = load_pkcs11_key(tmp)) == NULL)
 			fatal("No PKCS#11 key matching %s found", ca_key_path);
 	} else if (prefer_agent) {
 		/*
 		 * Agent signature requested. Try to use agent after making
 		 * sure the public key specified is actually present in the
 		 * agent.
 		 */
 		if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
 			fatal_r(r, "Cannot load CA public key %s", tmp);
 		if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
 			fatal_r(r, "Cannot use public key for CA signature");
 		if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
 			fatal_r(r, "Retrieve agent key list");
 		found = 0;
 		for (j = 0; j < agent_ids->nkeys; j++) {
 			if (sshkey_equal(ca, agent_ids->keys[j])) {
 				found = 1;
 				break;
 			}
 		}
 		if (!found)
 			fatal("CA key %s not found in agent", tmp);
 		ssh_free_identitylist(agent_ids);
 		ca->flags |= SSHKEY_FLAG_EXT;
 	} else {
 		/* CA key is assumed to be a private key on the filesystem */
 		ca = load_identity(tmp, NULL);
 		if (sshkey_is_sk(ca) &&
 		    (ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
 			if ((pin = read_passphrase("Enter PIN for CA key: ",
 			    RP_ALLOW_STDIN)) == NULL)
 				fatal_f("couldn't read PIN");
 		}
 	}
 	free(tmp);
 
 	if (key_type_name != NULL) {
 		if (sshkey_type_from_name(key_type_name) != ca->type) {
 			fatal("CA key type %s doesn't match specified %s",
 			    sshkey_ssh_name(ca), key_type_name);
 		}
 	} else if (ca->type == KEY_RSA) {
 		/* Default to a good signature algorithm */
 		key_type_name = "rsa-sha2-512";
 	}
 	ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
 
 	finalise_cert_exts();
 	for (i = 0; i < argc; i++) {
 		/* Split list of principals */
 		n = 0;
 		if (cert_principals != NULL) {
 			otmp = tmp = xstrdup(cert_principals);
 			plist = NULL;
 			for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
 				plist = xreallocarray(plist, n + 1, sizeof(*plist));
 				if (*(plist[n] = xstrdup(cp)) == '\0')
 					fatal("Empty principal name");
 			}
 			free(otmp);
 		}
 		if (n > SSHKEY_CERT_MAX_PRINCIPALS)
 			fatal("Too many certificate principals specified");
 
 		tmp = tilde_expand_filename(argv[i], pw->pw_uid);
 		if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
 			fatal_r(r, "load pubkey \"%s\"", tmp);
 		if (sshkey_is_cert(public))
 			fatal_f("key \"%s\" type %s cannot be certified",
 			    tmp, sshkey_type(public));
 
 		/* Prepare certificate to sign */
 		if ((r = sshkey_to_certified(public)) != 0)
 			fatal_r(r, "Could not upgrade key %s to certificate", tmp);
 		public->cert->type = cert_key_type;
 		public->cert->serial = (u_int64_t)cert_serial;
 		public->cert->key_id = xstrdup(cert_key_id);
 		public->cert->nprincipals = n;
 		public->cert->principals = plist;
 		public->cert->valid_after = cert_valid_from;
 		public->cert->valid_before = cert_valid_to;
 		prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
 		prepare_options_buf(public->cert->extensions,
 		    OPTIONS_EXTENSIONS);
 		if ((r = sshkey_from_private(ca,
 		    &public->cert->signature_key)) != 0)
 			fatal_r(r, "sshkey_from_private (ca key)");
 
 		if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
 			if ((r = sshkey_certify_custom(public, ca,
 			    key_type_name, sk_provider, NULL, agent_signer,
 			    &agent_fd)) != 0)
 				fatal_r(r, "Couldn't certify %s via agent", tmp);
 		} else {
 			if (sshkey_is_sk(ca) &&
 			    (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
 				notifier = notify_start(0,
 				    "Confirm user presence for key %s %s",
 				    sshkey_type(ca), ca_fp);
 			}
 			r = sshkey_certify(public, ca, key_type_name,
 			    sk_provider, pin);
 			notify_complete(notifier, "User presence confirmed");
 			if (r != 0)
 				fatal_r(r, "Couldn't certify key %s", tmp);
 		}
 
 		if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
 			*cp = '\0';
 		xasprintf(&out, "%s-cert.pub", tmp);
 		free(tmp);
 
 		if ((r = sshkey_save_public(public, out, comment)) != 0) {
 			fatal_r(r, "Unable to save public key to %s",
 			    identity_file);
 		}
 
 		if (!quiet) {
 			sshkey_format_cert_validity(public->cert,
 			    valid, sizeof(valid));
 			logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
 			    "valid %s", sshkey_cert_type(public),
 			    out, public->cert->key_id,
 			    (unsigned long long)public->cert->serial,
 			    cert_principals != NULL ? " for " : "",
 			    cert_principals != NULL ? cert_principals : "",
 			    valid);
 		}
 
 		sshkey_free(public);
 		free(out);
 		if (cert_serial_autoinc)
 			cert_serial++;
 	}
 	if (pin != NULL)
 		freezero(pin, strlen(pin));
 	free(ca_fp);
 #ifdef ENABLE_PKCS11
 	pkcs11_terminate();
 #endif
 	exit(0);
 }
 
 static u_int64_t
 parse_relative_time(const char *s, time_t now)
 {
 	int64_t mul, secs;
 
 	mul = *s == '-' ? -1 : 1;
 
 	if ((secs = convtime(s + 1)) == -1)
 		fatal("Invalid relative certificate time %s", s);
 	if (mul == -1 && secs > now)
 		fatal("Certificate time %s cannot be represented", s);
 	return now + (u_int64_t)(secs * mul);
 }
 
 static void
 parse_hex_u64(const char *s, uint64_t *up)
 {
 	char *ep;
 	unsigned long long ull;
 
 	errno = 0;
 	ull = strtoull(s, &ep, 16);
 	if (*s == '\0' || *ep != '\0')
 		fatal("Invalid certificate time: not a number");
 	if (errno == ERANGE && ull == ULONG_MAX)
 		fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time");
 	*up = (uint64_t)ull;
 }
 
 static void
 parse_cert_times(char *timespec)
 {
 	char *from, *to;
 	time_t now = time(NULL);
 	int64_t secs;
 
 	/* +timespec relative to now */
 	if (*timespec == '+' && strchr(timespec, ':') == NULL) {
 		if ((secs = convtime(timespec + 1)) == -1)
 			fatal("Invalid relative certificate life %s", timespec);
 		cert_valid_to = now + secs;
 		/*
 		 * Backdate certificate one minute to avoid problems on hosts
 		 * with poorly-synchronised clocks.
 		 */
 		cert_valid_from = ((now - 59)/ 60) * 60;
 		return;
 	}
 
 	/*
 	 * from:to, where
 	 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always"
 	 *   to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever"
 	 */
 	from = xstrdup(timespec);
 	to = strchr(from, ':');
 	if (to == NULL || from == to || *(to + 1) == '\0')
 		fatal("Invalid certificate life specification %s", timespec);
 	*to++ = '\0';
 
 	if (*from == '-' || *from == '+')
 		cert_valid_from = parse_relative_time(from, now);
 	else if (strcmp(from, "always") == 0)
 		cert_valid_from = 0;
 	else if (strncmp(from, "0x", 2) == 0)
 		parse_hex_u64(from, &cert_valid_from);
 	else if (parse_absolute_time(from, &cert_valid_from) != 0)
 		fatal("Invalid from time \"%s\"", from);
 
 	if (*to == '-' || *to == '+')
 		cert_valid_to = parse_relative_time(to, now);
 	else if (strcmp(to, "forever") == 0)
 		cert_valid_to = ~(u_int64_t)0;
 	else if (strncmp(to, "0x", 2) == 0)
 		parse_hex_u64(to, &cert_valid_to);
 	else if (parse_absolute_time(to, &cert_valid_to) != 0)
 		fatal("Invalid to time \"%s\"", to);
 
 	if (cert_valid_to <= cert_valid_from)
 		fatal("Empty certificate validity interval");
 	free(from);
 }
 
 static void
 add_cert_option(char *opt)
 {
 	char *val, *cp;
 	int iscrit = 0;
 
 	if (strcasecmp(opt, "clear") == 0)
 		certflags_flags = 0;
 	else if (strcasecmp(opt, "no-x11-forwarding") == 0)
 		certflags_flags &= ~CERTOPT_X_FWD;
 	else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
 		certflags_flags |= CERTOPT_X_FWD;
 	else if (strcasecmp(opt, "no-agent-forwarding") == 0)
 		certflags_flags &= ~CERTOPT_AGENT_FWD;
 	else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
 		certflags_flags |= CERTOPT_AGENT_FWD;
 	else if (strcasecmp(opt, "no-port-forwarding") == 0)
 		certflags_flags &= ~CERTOPT_PORT_FWD;
 	else if (strcasecmp(opt, "permit-port-forwarding") == 0)
 		certflags_flags |= CERTOPT_PORT_FWD;
 	else if (strcasecmp(opt, "no-pty") == 0)
 		certflags_flags &= ~CERTOPT_PTY;
 	else if (strcasecmp(opt, "permit-pty") == 0)
 		certflags_flags |= CERTOPT_PTY;
 	else if (strcasecmp(opt, "no-user-rc") == 0)
 		certflags_flags &= ~CERTOPT_USER_RC;
 	else if (strcasecmp(opt, "permit-user-rc") == 0)
 		certflags_flags |= CERTOPT_USER_RC;
 	else if (strcasecmp(opt, "touch-required") == 0)
 		certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
 	else if (strcasecmp(opt, "no-touch-required") == 0)
 		certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
 	else if (strcasecmp(opt, "no-verify-required") == 0)
 		certflags_flags &= ~CERTOPT_REQUIRE_VERIFY;
 	else if (strcasecmp(opt, "verify-required") == 0)
 		certflags_flags |= CERTOPT_REQUIRE_VERIFY;
 	else if (strncasecmp(opt, "force-command=", 14) == 0) {
 		val = opt + 14;
 		if (*val == '\0')
 			fatal("Empty force-command option");
 		if (certflags_command != NULL)
 			fatal("force-command already specified");
 		certflags_command = xstrdup(val);
 	} else if (strncasecmp(opt, "source-address=", 15) == 0) {
 		val = opt + 15;
 		if (*val == '\0')
 			fatal("Empty source-address option");
 		if (certflags_src_addr != NULL)
 			fatal("source-address already specified");
 		if (addr_match_cidr_list(NULL, val) != 0)
 			fatal("Invalid source-address list");
 		certflags_src_addr = xstrdup(val);
 	} else if (strncasecmp(opt, "extension:", 10) == 0 ||
 		    (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
 		val = xstrdup(strchr(opt, ':') + 1);
 		if ((cp = strchr(val, '=')) != NULL)
 			*cp++ = '\0';
 		cert_ext_add(val, cp, iscrit);
 		free(val);
 	} else
 		fatal("Unsupported certificate option \"%s\"", opt);
 }
 
 static void
 show_options(struct sshbuf *optbuf, int in_critical)
 {
 	char *name, *arg, *hex;
 	struct sshbuf *options, *option = NULL;
 	int r;
 
 	if ((options = sshbuf_fromb(optbuf)) == NULL)
 		fatal_f("sshbuf_fromb failed");
 	while (sshbuf_len(options) != 0) {
 		sshbuf_free(option);
 		option = NULL;
 		if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
 		    (r = sshbuf_froms(options, &option)) != 0)
 			fatal_fr(r, "parse option");
 		printf("                %s", name);
 		if (!in_critical &&
 		    (strcmp(name, "permit-X11-forwarding") == 0 ||
 		    strcmp(name, "permit-agent-forwarding") == 0 ||
 		    strcmp(name, "permit-port-forwarding") == 0 ||
 		    strcmp(name, "permit-pty") == 0 ||
 		    strcmp(name, "permit-user-rc") == 0 ||
 		    strcmp(name, "no-touch-required") == 0)) {
 			printf("\n");
 		} else if (in_critical &&
 		    (strcmp(name, "force-command") == 0 ||
 		    strcmp(name, "source-address") == 0)) {
 			if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
 				fatal_fr(r, "parse critical");
 			printf(" %s\n", arg);
 			free(arg);
 		} else if (in_critical &&
 		    strcmp(name, "verify-required") == 0) {
 			printf("\n");
 		} else if (sshbuf_len(option) > 0) {
 			hex = sshbuf_dtob16(option);
 			printf(" UNKNOWN OPTION: %s (len %zu)\n",
 			    hex, sshbuf_len(option));
 			sshbuf_reset(option);
 			free(hex);
 		} else
 			printf(" UNKNOWN FLAG OPTION\n");
 		free(name);
 		if (sshbuf_len(option) != 0)
 			fatal("Option corrupt: extra data at end");
 	}
 	sshbuf_free(option);
 	sshbuf_free(options);
 }
 
 static void
 print_cert(struct sshkey *key)
 {
 	char valid[64], *key_fp, *ca_fp;
 	u_int i;
 
 	key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
 	ca_fp = sshkey_fingerprint(key->cert->signature_key,
 	    fingerprint_hash, SSH_FP_DEFAULT);
 	if (key_fp == NULL || ca_fp == NULL)
 		fatal_f("sshkey_fingerprint fail");
 	sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
 
 	printf("        Type: %s %s certificate\n", sshkey_ssh_name(key),
 	    sshkey_cert_type(key));
 	printf("        Public key: %s %s\n", sshkey_type(key), key_fp);
 	printf("        Signing CA: %s %s (using %s)\n",
 	    sshkey_type(key->cert->signature_key), ca_fp,
 	    key->cert->signature_type);
 	printf("        Key ID: \"%s\"\n", key->cert->key_id);
 	printf("        Serial: %llu\n", (unsigned long long)key->cert->serial);
 	printf("        Valid: %s\n", valid);
 	printf("        Principals: ");
 	if (key->cert->nprincipals == 0)
 		printf("(none)\n");
 	else {
 		for (i = 0; i < key->cert->nprincipals; i++)
 			printf("\n                %s",
 			    key->cert->principals[i]);
 		printf("\n");
 	}
 	printf("        Critical Options: ");
 	if (sshbuf_len(key->cert->critical) == 0)
 		printf("(none)\n");
 	else {
 		printf("\n");
 		show_options(key->cert->critical, 1);
 	}
 	printf("        Extensions: ");
 	if (sshbuf_len(key->cert->extensions) == 0)
 		printf("(none)\n");
 	else {
 		printf("\n");
 		show_options(key->cert->extensions, 0);
 	}
 }
 
 static void
 do_show_cert(struct passwd *pw)
 {
 	struct sshkey *key = NULL;
 	struct stat st;
 	int r, is_stdin = 0, ok = 0;
 	FILE *f;
 	char *cp, *line = NULL;
 	const char *path;
 	size_t linesize = 0;
 	u_long lnum = 0;
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which the key is");
 	if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
 		fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
 
 	path = identity_file;
 	if (strcmp(path, "-") == 0) {
 		f = stdin;
 		path = "(stdin)";
 		is_stdin = 1;
 	} else if ((f = fopen(identity_file, "r")) == NULL)
 		fatal("fopen %s: %s", identity_file, strerror(errno));
 
 	while (getline(&line, &linesize, f) != -1) {
 		lnum++;
 		sshkey_free(key);
 		key = NULL;
 		/* Trim leading space and comments */
 		cp = line + strspn(line, " \t");
 		if (*cp == '#' || *cp == '\0')
 			continue;
 		if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
 			fatal("sshkey_new");
 		if ((r = sshkey_read(key, &cp)) != 0) {
 			error_r(r, "%s:%lu: invalid key", path, lnum);
 			continue;
 		}
 		if (!sshkey_is_cert(key)) {
 			error("%s:%lu is not a certificate", path, lnum);
 			continue;
 		}
 		ok = 1;
 		if (!is_stdin && lnum == 1)
 			printf("%s:\n", path);
 		else
 			printf("%s:%lu:\n", path, lnum);
 		print_cert(key);
 	}
 	free(line);
 	sshkey_free(key);
 	fclose(f);
 	exit(ok ? 0 : 1);
 }
 
 static void
 load_krl(const char *path, struct ssh_krl **krlp)
 {
 	struct sshbuf *krlbuf;
 	int r;
 
 	if ((r = sshbuf_load_file(path, &krlbuf)) != 0)
 		fatal_r(r, "Unable to load KRL %s", path);
 	/* XXX check sigs */
 	if ((r = ssh_krl_from_blob(krlbuf, krlp)) != 0 ||
 	    *krlp == NULL)
 		fatal_r(r, "Invalid KRL file %s", path);
 	sshbuf_free(krlbuf);
 }
 
 static void
 hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
     const char *file, u_long lnum)
 {
 	char *tmp;
 	size_t tlen;
 	struct sshbuf *b;
 	int r;
 
 	if (strncmp(cp, "SHA256:", 7) != 0)
 		fatal("%s:%lu: unsupported hash algorithm", file, lnum);
 	cp += 7;
 
 	/*
 	 * OpenSSH base64 hashes omit trailing '='
 	 * characters; put them back for decode.
 	 */
 	if ((tlen = strlen(cp)) >= SIZE_MAX - 5)
 		fatal_f("hash too long: %zu bytes", tlen);
 	tmp = xmalloc(tlen + 4 + 1);
 	strlcpy(tmp, cp, tlen + 1);
 	while ((tlen % 4) != 0) {
 		tmp[tlen++] = '=';
 		tmp[tlen] = '\0';
 	}
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_b64tod(b, tmp)) != 0)
 		fatal_r(r, "%s:%lu: decode hash failed", file, lnum);
 	free(tmp);
 	*lenp = sshbuf_len(b);
 	*blobp = xmalloc(*lenp);
 	memcpy(*blobp, sshbuf_ptr(b), *lenp);
 	sshbuf_free(b);
 }
 
 static void
 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
     const struct sshkey *ca, struct ssh_krl *krl)
 {
 	struct sshkey *key = NULL;
 	u_long lnum = 0;
 	char *path, *cp, *ep, *line = NULL;
 	u_char *blob = NULL;
 	size_t blen = 0, linesize = 0;
 	unsigned long long serial, serial2;
 	int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
 	FILE *krl_spec;
 
 	path = tilde_expand_filename(file, pw->pw_uid);
 	if (strcmp(path, "-") == 0) {
 		krl_spec = stdin;
 		free(path);
 		path = xstrdup("(standard input)");
 	} else if ((krl_spec = fopen(path, "r")) == NULL)
 		fatal("fopen %s: %s", path, strerror(errno));
 
 	if (!quiet)
 		printf("Revoking from %s\n", path);
 	while (getline(&line, &linesize, krl_spec) != -1) {
 		if (linesize >= INT_MAX) {
 			fatal_f("%s contains unparsable line, len=%zu",
 			    path, linesize);
 		}
 		lnum++;
 		was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
 		cp = line + strspn(line, " \t");
 		/* Trim trailing space, comments and strip \n */
 		for (i = 0, r = -1; cp[i] != '\0'; i++) {
 			if (cp[i] == '#' || cp[i] == '\n') {
 				cp[i] = '\0';
 				break;
 			}
 			if (cp[i] == ' ' || cp[i] == '\t') {
 				/* Remember the start of a span of whitespace */
 				if (r == -1)
 					r = i;
 			} else
 				r = -1;
 		}
 		if (r != -1)
 			cp[r] = '\0';
 		if (*cp == '\0')
 			continue;
 		if (strncasecmp(cp, "serial:", 7) == 0) {
 			if (ca == NULL && !wild_ca) {
 				fatal("revoking certificates by serial number "
 				    "requires specification of a CA key");
 			}
 			cp += 7;
 			cp = cp + strspn(cp, " \t");
 			errno = 0;
 			serial = strtoull(cp, &ep, 0);
 			if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
 				fatal("%s:%lu: invalid serial \"%s\"",
 				    path, lnum, cp);
 			if (errno == ERANGE && serial == ULLONG_MAX)
 				fatal("%s:%lu: serial out of range",
 				    path, lnum);
 			serial2 = serial;
 			if (*ep == '-') {
 				cp = ep + 1;
 				errno = 0;
 				serial2 = strtoull(cp, &ep, 0);
 				if (*cp == '\0' || *ep != '\0')
 					fatal("%s:%lu: invalid serial \"%s\"",
 					    path, lnum, cp);
 				if (errno == ERANGE && serial2 == ULLONG_MAX)
 					fatal("%s:%lu: serial out of range",
 					    path, lnum);
 				if (serial2 <= serial)
 					fatal("%s:%lu: invalid serial range "
 					    "%llu:%llu", path, lnum,
 					    (unsigned long long)serial,
 					    (unsigned long long)serial2);
 			}
 			if (ssh_krl_revoke_cert_by_serial_range(krl,
 			    ca, serial, serial2) != 0) {
 				fatal_f("revoke serial failed");
 			}
 		} else if (strncasecmp(cp, "id:", 3) == 0) {
 			if (ca == NULL && !wild_ca) {
 				fatal("revoking certificates by key ID "
 				    "requires specification of a CA key");
 			}
 			cp += 3;
 			cp = cp + strspn(cp, " \t");
 			if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
 				fatal_f("revoke key ID failed");
 		} else if (strncasecmp(cp, "hash:", 5) == 0) {
 			cp += 5;
 			cp = cp + strspn(cp, " \t");
 			hash_to_blob(cp, &blob, &blen, file, lnum);
 			r = ssh_krl_revoke_key_sha256(krl, blob, blen);
 			if (r != 0)
 				fatal_fr(r, "revoke key failed");
 		} else {
 			if (strncasecmp(cp, "key:", 4) == 0) {
 				cp += 4;
 				cp = cp + strspn(cp, " \t");
 				was_explicit_key = 1;
 			} else if (strncasecmp(cp, "sha1:", 5) == 0) {
 				cp += 5;
 				cp = cp + strspn(cp, " \t");
 				was_sha1 = 1;
 			} else if (strncasecmp(cp, "sha256:", 7) == 0) {
 				cp += 7;
 				cp = cp + strspn(cp, " \t");
 				was_sha256 = 1;
 				/*
 				 * Just try to process the line as a key.
 				 * Parsing will fail if it isn't.
 				 */
 			}
 			if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
 				fatal("sshkey_new");
 			if ((r = sshkey_read(key, &cp)) != 0)
 				fatal_r(r, "%s:%lu: invalid key", path, lnum);
 			if (was_explicit_key)
 				r = ssh_krl_revoke_key_explicit(krl, key);
 			else if (was_sha1) {
 				if (sshkey_fingerprint_raw(key,
 				    SSH_DIGEST_SHA1, &blob, &blen) != 0) {
 					fatal("%s:%lu: fingerprint failed",
 					    file, lnum);
 				}
 				r = ssh_krl_revoke_key_sha1(krl, blob, blen);
 			} else if (was_sha256) {
 				if (sshkey_fingerprint_raw(key,
 				    SSH_DIGEST_SHA256, &blob, &blen) != 0) {
 					fatal("%s:%lu: fingerprint failed",
 					    file, lnum);
 				}
 				r = ssh_krl_revoke_key_sha256(krl, blob, blen);
 			} else
 				r = ssh_krl_revoke_key(krl, key);
 			if (r != 0)
 				fatal_fr(r, "revoke key failed");
 			freezero(blob, blen);
 			blob = NULL;
 			blen = 0;
 			sshkey_free(key);
 		}
 	}
 	if (strcmp(path, "-") != 0)
 		fclose(krl_spec);
 	free(line);
 	free(path);
 }
 
 static void
 do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
     unsigned long long krl_version, const char *krl_comment,
     int argc, char **argv)
 {
 	struct ssh_krl *krl;
 	struct stat sb;
 	struct sshkey *ca = NULL;
 	int i, r, wild_ca = 0;
 	char *tmp;
 	struct sshbuf *kbuf;
 
 	if (*identity_file == '\0')
 		fatal("KRL generation requires an output file");
 	if (stat(identity_file, &sb) == -1) {
 		if (errno != ENOENT)
 			fatal("Cannot access KRL \"%s\": %s",
 			    identity_file, strerror(errno));
 		if (updating)
 			fatal("KRL \"%s\" does not exist", identity_file);
 	}
 	if (ca_key_path != NULL) {
 		if (strcasecmp(ca_key_path, "none") == 0)
 			wild_ca = 1;
 		else {
 			tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
 			if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
 				fatal_r(r, "Cannot load CA public key %s", tmp);
 			free(tmp);
 		}
 	}
 
 	if (updating)
 		load_krl(identity_file, &krl);
 	else if ((krl = ssh_krl_init()) == NULL)
 		fatal("couldn't create KRL");
 
 	if (krl_version != 0)
 		ssh_krl_set_version(krl, krl_version);
 	if (krl_comment != NULL)
 		ssh_krl_set_comment(krl, krl_comment);
 
 	for (i = 0; i < argc; i++)
 		update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
 
 	if ((kbuf = sshbuf_new()) == NULL)
 		fatal("sshbuf_new failed");
 	if (ssh_krl_to_blob(krl, kbuf) != 0)
 		fatal("Couldn't generate KRL");
 	if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)
 		fatal("write %s: %s", identity_file, strerror(errno));
 	sshbuf_free(kbuf);
 	ssh_krl_free(krl);
 	sshkey_free(ca);
 }
 
 static void
 do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)
 {
 	int i, r, ret = 0;
 	char *comment;
 	struct ssh_krl *krl;
 	struct sshkey *k;
 
 	if (*identity_file == '\0')
 		fatal("KRL checking requires an input file");
 	load_krl(identity_file, &krl);
 	if (print_krl)
 		krl_dump(krl, stdout);
 	for (i = 0; i < argc; i++) {
 		if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
 			fatal_r(r, "Cannot load public key %s", argv[i]);
 		r = ssh_krl_check_key(krl, k);
 		printf("%s%s%s%s: %s\n", argv[i],
 		    *comment ? " (" : "", comment, *comment ? ")" : "",
 		    r == 0 ? "ok" : "REVOKED");
 		if (r != 0)
 			ret = 1;
 		sshkey_free(k);
 		free(comment);
 	}
 	ssh_krl_free(krl);
 	exit(ret);
 }
 
 static struct sshkey *
 load_sign_key(const char *keypath, const struct sshkey *pubkey)
 {
 	size_t i, slen, plen = strlen(keypath);
 	char *privpath = xstrdup(keypath);
 	static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
 	struct sshkey *ret = NULL, *privkey = NULL;
 	int r, waspub = 0;
 	struct stat st;
 
 	/*
 	 * If passed a public key filename, then try to locate the corresponding
 	 * private key. This lets us specify certificates on the command-line
 	 * and have ssh-keygen find the appropriate private key.
 	 */
 	for (i = 0; suffixes[i]; i++) {
 		slen = strlen(suffixes[i]);
 		if (plen <= slen ||
 		    strcmp(privpath + plen - slen, suffixes[i]) != 0)
 			continue;
 		privpath[plen - slen] = '\0';
 		debug_f("%s looks like a public key, using private key "
 		    "path %s instead", keypath, privpath);
 		waspub = 1;
 	}
 	if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
 		fatal("No private key found for public key \"%s\"", keypath);
 	if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
 	    (r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
 		debug_fr(r, "load private key \"%s\"", privpath);
 		fatal("No private key found for \"%s\"", privpath);
 	} else if (privkey == NULL)
 		privkey = load_identity(privpath, NULL);
 
 	if (!sshkey_equal_public(pubkey, privkey)) {
 		error("Public key %s doesn't match private %s",
 		    keypath, privpath);
 		goto done;
 	}
 	if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
 		/*
 		 * Graft the certificate onto the private key to make
 		 * it capable of signing.
 		 */
 		if ((r = sshkey_to_certified(privkey)) != 0) {
 			error_fr(r, "sshkey_to_certified");
 			goto done;
 		}
 		if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
 			error_fr(r, "sshkey_cert_copy");
 			goto done;
 		}
 	}
 	/* success */
 	ret = privkey;
 	privkey = NULL;
  done:
 	sshkey_free(privkey);
 	free(privpath);
 	return ret;
 }
 
 static int
 sign_one(struct sshkey *signkey, const char *filename, int fd,
     const char *sig_namespace, const char *hashalg, sshsig_signer *signer,
     void *signer_ctx)
 {
 	struct sshbuf *sigbuf = NULL, *abuf = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
 	char *wfile = NULL, *asig = NULL, *fp = NULL;
 	char *pin = NULL, *prompt = NULL;
 
 	if (!quiet) {
 		if (fd == STDIN_FILENO)
 			fprintf(stderr, "Signing data on standard input\n");
 		else
 			fprintf(stderr, "Signing file %s\n", filename);
 	}
 	if (signer == NULL && sshkey_is_sk(signkey)) {
 		if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
 			xasprintf(&prompt, "Enter PIN for %s key: ",
 			    sshkey_type(signkey));
 			if ((pin = read_passphrase(prompt,
 			    RP_ALLOW_STDIN)) == NULL)
 				fatal_f("couldn't read PIN");
 		}
 		if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
 			if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
 			    SSH_FP_DEFAULT)) == NULL)
 				fatal_f("fingerprint failed");
 			fprintf(stderr, "Confirm user presence for key %s %s\n",
 			    sshkey_type(signkey), fp);
 			free(fp);
 		}
 	}
 	if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin,
 	    fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) {
 		error_r(r, "Signing %s failed", filename);
 		goto out;
 	}
 	if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
 		error_fr(r, "sshsig_armor");
 		goto out;
 	}
 	if ((asig = sshbuf_dup_string(abuf)) == NULL) {
 		error_f("buffer error");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	if (fd == STDIN_FILENO) {
 		fputs(asig, stdout);
 		fflush(stdout);
 	} else {
 		xasprintf(&wfile, "%s.sig", filename);
 		if (confirm_overwrite(wfile)) {
 			if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
 			    0666)) == -1) {
 				oerrno = errno;
 				error("Cannot open %s: %s",
 				    wfile, strerror(errno));
 				errno = oerrno;
 				r = SSH_ERR_SYSTEM_ERROR;
 				goto out;
 			}
 			if (atomicio(vwrite, wfd, asig,
 			    strlen(asig)) != strlen(asig)) {
 				oerrno = errno;
 				error("Cannot write to %s: %s",
 				    wfile, strerror(errno));
 				errno = oerrno;
 				r = SSH_ERR_SYSTEM_ERROR;
 				goto out;
 			}
 			if (!quiet) {
 				fprintf(stderr, "Write signature to %s\n",
 				    wfile);
 			}
 		}
 	}
 	/* success */
 	r = 0;
  out:
 	free(wfile);
 	free(prompt);
 	free(asig);
 	if (pin != NULL)
 		freezero(pin, strlen(pin));
 	sshbuf_free(abuf);
 	sshbuf_free(sigbuf);
 	if (wfd != -1)
 		close(wfd);
 	return r;
 }
 
 static int
 sig_process_opts(char * const *opts, size_t nopts, char **hashalgp,
     uint64_t *verify_timep, int *print_pubkey)
 {
 	size_t i;
 	time_t now;
 
 	if (verify_timep != NULL)
 		*verify_timep = 0;
 	if (print_pubkey != NULL)
 		*print_pubkey = 0;
 	if (hashalgp != NULL)
 		*hashalgp = NULL;
 	for (i = 0; i < nopts; i++) {
 		if (hashalgp != NULL &&
 		    strncasecmp(opts[i], "hashalg=", 8) == 0) {
 			*hashalgp = xstrdup(opts[i] + 8);
 		} else if (verify_timep &&
 		    strncasecmp(opts[i], "verify-time=", 12) == 0) {
 			if (parse_absolute_time(opts[i] + 12,
 			    verify_timep) != 0 || *verify_timep == 0) {
 				error("Invalid \"verify-time\" option");
 				return SSH_ERR_INVALID_ARGUMENT;
 			}
 		} else if (print_pubkey &&
 		    strcasecmp(opts[i], "print-pubkey") == 0) {
 			*print_pubkey = 1;
 		} else {
 			error("Invalid option \"%s\"", opts[i]);
 			return SSH_ERR_INVALID_ARGUMENT;
 		}
 	}
 	if (verify_timep && *verify_timep == 0) {
 		if ((now = time(NULL)) < 0) {
 			error("Time is before epoch");
 			return SSH_ERR_INVALID_ARGUMENT;
 		}
 		*verify_timep = (uint64_t)now;
 	}
 	return 0;
 }
 
 
 static int
 sig_sign(const char *keypath, const char *sig_namespace, int require_agent,
     int argc, char **argv, char * const *opts, size_t nopts)
 {
 	int i, fd = -1, r, ret = -1;
 	int agent_fd = -1;
 	struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
 	sshsig_signer *signer = NULL;
 	char *hashalg = NULL;
 
 	/* Check file arguments. */
 	for (i = 0; i < argc; i++) {
 		if (strcmp(argv[i], "-") != 0)
 			continue;
 		if (i > 0 || argc > 1)
 			fatal("Cannot sign mix of paths and standard input");
 	}
 
 	if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0)
 		goto done; /* error already logged */
 
 	if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
 		error_r(r, "Couldn't load public key %s", keypath);
 		goto done;
 	}
 
 	if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
 		if (require_agent)
 			fatal("Couldn't get agent socket");
 		debug_r(r, "Couldn't get agent socket");
 	} else {
 		if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
 			signer = agent_signer;
 		else {
 			if (require_agent)
 				fatal("Couldn't find key in agent");
 			debug_r(r, "Couldn't find key in agent");
 		}
 	}
 
 	if (signer == NULL) {
 		/* Not using agent - try to load private key */
 		if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
 			goto done;
 		signkey = privkey;
 	} else {
 		/* Will use key in agent */
 		signkey = pubkey;
 	}
 
 	if (argc == 0) {
 		if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
 		    sig_namespace, hashalg, signer, &agent_fd)) != 0)
 			goto done;
 	} else {
 		for (i = 0; i < argc; i++) {
 			if (strcmp(argv[i], "-") == 0)
 				fd = STDIN_FILENO;
 			else if ((fd = open(argv[i], O_RDONLY)) == -1) {
 				error("Cannot open %s for signing: %s",
 				    argv[i], strerror(errno));
 				goto done;
 			}
 			if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
 			    hashalg, signer, &agent_fd)) != 0)
 				goto done;
 			if (fd != STDIN_FILENO)
 				close(fd);
 			fd = -1;
 		}
 	}
 
 	ret = 0;
 done:
 	if (fd != -1 && fd != STDIN_FILENO)
 		close(fd);
 	sshkey_free(pubkey);
 	sshkey_free(privkey);
 	free(hashalg);
 	return ret;
 }
 
 static int
 sig_verify(const char *signature, const char *sig_namespace,
     const char *principal, const char *allowed_keys, const char *revoked_keys,
     char * const *opts, size_t nopts)
 {
 	int r, ret = -1;
 	int print_pubkey = 0;
 	struct sshbuf *sigbuf = NULL, *abuf = NULL;
 	struct sshkey *sign_key = NULL;
 	char *fp = NULL;
 	struct sshkey_sig_details *sig_details = NULL;
 	uint64_t verify_time = 0;
 
 	if (sig_process_opts(opts, nopts, NULL, &verify_time,
 	    &print_pubkey) != 0)
 		goto done; /* error already logged */
 
 	memset(&sig_details, 0, sizeof(sig_details));
 	if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
 		error_r(r, "Couldn't read signature file");
 		goto done;
 	}
 
 	if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
 		error_fr(r, "sshsig_armor");
 		goto done;
 	}
 	if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
 	    &sign_key, &sig_details)) != 0)
 		goto done; /* sshsig_verify() prints error */
 
 	if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
 	    SSH_FP_DEFAULT)) == NULL)
 		fatal_f("sshkey_fingerprint failed");
 	debug("Valid (unverified) signature from key %s", fp);
 	if (sig_details != NULL) {
 		debug2_f("signature details: counter = %u, flags = 0x%02x",
 		    sig_details->sk_counter, sig_details->sk_flags);
 	}
 	free(fp);
 	fp = NULL;
 
 	if (revoked_keys != NULL) {
 		if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
 			debug3_fr(r, "sshkey_check_revoked");
 			goto done;
 		}
 	}
 
 	if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,
 	    sign_key, principal, sig_namespace, verify_time)) != 0) {
 		debug3_fr(r, "sshsig_check_allowed_keys");
 		goto done;
 	}
 	/* success */
 	ret = 0;
 done:
 	if (!quiet) {
 		if (ret == 0) {
 			if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
 			    SSH_FP_DEFAULT)) == NULL)
 				fatal_f("sshkey_fingerprint failed");
 			if (principal == NULL) {
 				printf("Good \"%s\" signature with %s key %s\n",
 				    sig_namespace, sshkey_type(sign_key), fp);
 
 			} else {
 				printf("Good \"%s\" signature for %s with %s key %s\n",
 				    sig_namespace, principal,
 				    sshkey_type(sign_key), fp);
 			}
 		} else {
 			printf("Could not verify signature.\n");
 		}
 	}
 	/* Print the signature key if requested */
 	if (ret == 0 && print_pubkey && sign_key != NULL) {
 		if ((r = sshkey_write(sign_key, stdout)) == 0)
 			fputc('\n', stdout);
 		else {
 			error_r(r, "Could not print public key.\n");
 			ret = -1;
 		}
 	}
 	sshbuf_free(sigbuf);
 	sshbuf_free(abuf);
 	sshkey_free(sign_key);
 	sshkey_sig_details_free(sig_details);
 	free(fp);
 	return ret;
 }
 
 static int
 sig_find_principals(const char *signature, const char *allowed_keys,
     char * const *opts, size_t nopts)
 {
 	int r, ret = -1;
 	struct sshbuf *sigbuf = NULL, *abuf = NULL;
 	struct sshkey *sign_key = NULL;
 	char *principals = NULL, *cp, *tmp;
 	uint64_t verify_time = 0;
 
 	if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0)
 		goto done; /* error already logged */
 
 	if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
 		error_r(r, "Couldn't read signature file");
 		goto done;
 	}
 	if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
 		error_fr(r, "sshsig_armor");
 		goto done;
 	}
 	if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
 		error_fr(r, "sshsig_get_pubkey");
 		goto done;
 	}
 	if ((r = sshsig_find_principals(allowed_keys, sign_key,
 	    verify_time, &principals)) != 0) {
 		if (r != SSH_ERR_KEY_NOT_FOUND)
 			error_fr(r, "sshsig_find_principal");
 		goto done;
 	}
 	ret = 0;
 done:
 	if (ret == 0 ) {
 		/* Emit matching principals one per line */
 		tmp = principals;
 		while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0')
 			puts(cp);
 	} else {
 		fprintf(stderr, "No principal matched.\n");
 	}
 	sshbuf_free(sigbuf);
 	sshbuf_free(abuf);
 	sshkey_free(sign_key);
 	free(principals);
 	return ret;
 }
 
 static int
 sig_match_principals(const char *allowed_keys, char *principal,
 	char * const *opts, size_t nopts)
 {
 	int r;
 	char **principals = NULL;
 	size_t i, nprincipals = 0;
 
 	if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0)
 		return r; /* error already logged */
 
 	if ((r = sshsig_match_principals(allowed_keys, principal,
 	    &principals, &nprincipals)) != 0) {
 		debug_f("match: %s", ssh_err(r));
 		fprintf(stderr, "No principal matched.\n");
 		return r;
 	}
 	for (i = 0; i < nprincipals; i++) {
 		printf("%s\n", principals[i]);
 		free(principals[i]);
 	}
 	free(principals);
 
 	return 0;
 }
 
 static void
 do_moduli_gen(const char *out_file, char **opts, size_t nopts)
 {
 #ifdef WITH_OPENSSL
 	/* Moduli generation/screening */
 	u_int32_t memory = 0;
 	BIGNUM *start = NULL;
 	int moduli_bits = 0;
 	FILE *out;
 	size_t i;
 	const char *errstr;
 
 	/* Parse options */
 	for (i = 0; i < nopts; i++) {
 		if (strncmp(opts[i], "memory=", 7) == 0) {
 			memory = (u_int32_t)strtonum(opts[i]+7, 1,
 			    UINT_MAX, &errstr);
 			if (errstr) {
 				fatal("Memory limit is %s: %s",
 				    errstr, opts[i]+7);
 			}
 		} else if (strncmp(opts[i], "start=", 6) == 0) {
 			/* XXX - also compare length against bits */
 			if (BN_hex2bn(&start, opts[i]+6) == 0)
 				fatal("Invalid start point.");
 		} else if (strncmp(opts[i], "bits=", 5) == 0) {
 			moduli_bits = (int)strtonum(opts[i]+5, 1,
 			    INT_MAX, &errstr);
 			if (errstr) {
 				fatal("Invalid number: %s (%s)",
 					opts[i]+12, errstr);
 			}
 		} else {
 			fatal("Option \"%s\" is unsupported for moduli "
 			    "generation", opts[i]);
 		}
 	}
 
 	if ((out = fopen(out_file, "w")) == NULL) {
 		fatal("Couldn't open modulus candidate file \"%s\": %s",
 		    out_file, strerror(errno));
 	}
 	setvbuf(out, NULL, _IOLBF, 0);
 
 	if (moduli_bits == 0)
 		moduli_bits = DEFAULT_BITS;
 	if (gen_candidates(out, memory, moduli_bits, start) != 0)
 		fatal("modulus candidate generation failed");
 #else /* WITH_OPENSSL */
 	fatal("Moduli generation is not supported");
 #endif /* WITH_OPENSSL */
 }
 
 static void
 do_moduli_screen(const char *out_file, char **opts, size_t nopts)
 {
 #ifdef WITH_OPENSSL
 	/* Moduli generation/screening */
 	char *checkpoint = NULL;
 	u_int32_t generator_wanted = 0;
 	unsigned long start_lineno = 0, lines_to_process = 0;
 	int prime_tests = 0;
 	FILE *out, *in = stdin;
 	size_t i;
 	const char *errstr;
 
 	/* Parse options */
 	for (i = 0; i < nopts; i++) {
 		if (strncmp(opts[i], "lines=", 6) == 0) {
 			lines_to_process = strtoul(opts[i]+6, NULL, 10);
 		} else if (strncmp(opts[i], "start-line=", 11) == 0) {
 			start_lineno = strtoul(opts[i]+11, NULL, 10);
 		} else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
 			free(checkpoint);
 			checkpoint = xstrdup(opts[i]+11);
 		} else if (strncmp(opts[i], "generator=", 10) == 0) {
 			generator_wanted = (u_int32_t)strtonum(
 			    opts[i]+10, 1, UINT_MAX, &errstr);
 			if (errstr != NULL) {
 				fatal("Generator invalid: %s (%s)",
 				    opts[i]+10, errstr);
 			}
 		} else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
 			prime_tests = (int)strtonum(opts[i]+12, 1,
 			    INT_MAX, &errstr);
 			if (errstr) {
 				fatal("Invalid number: %s (%s)",
 					opts[i]+12, errstr);
 			}
 		} else {
 			fatal("Option \"%s\" is unsupported for moduli "
 			    "screening", opts[i]);
 		}
 	}
 
 	if (have_identity && strcmp(identity_file, "-") != 0) {
 		if ((in = fopen(identity_file, "r")) == NULL) {
 			fatal("Couldn't open modulus candidate "
 			    "file \"%s\": %s", identity_file,
 			    strerror(errno));
 		}
 	}
 
 	if ((out = fopen(out_file, "a")) == NULL) {
 		fatal("Couldn't open moduli file \"%s\": %s",
 		    out_file, strerror(errno));
 	}
 	setvbuf(out, NULL, _IOLBF, 0);
 	if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
 	    generator_wanted, checkpoint,
 	    start_lineno, lines_to_process) != 0)
 		fatal("modulus screening failed");
 	if (in != stdin)
 		(void)fclose(in);
 	free(checkpoint);
 #else /* WITH_OPENSSL */
 	fatal("Moduli screening is not supported");
 #endif /* WITH_OPENSSL */
 }
 
 /* Read and confirm a passphrase */
 static char *
 read_check_passphrase(const char *prompt1, const char *prompt2,
     const char *retry_prompt)
 {
 	char *passphrase1, *passphrase2;
 
 	for (;;) {
 		passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN);
 		passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN);
 		if (strcmp(passphrase1, passphrase2) == 0) {
 			freezero(passphrase2, strlen(passphrase2));
 			return passphrase1;
 		}
 		/* The passphrases do not match. Clear them and retry. */
 		freezero(passphrase1, strlen(passphrase1));
 		freezero(passphrase2, strlen(passphrase2));
 		fputs(retry_prompt, stdout);
 		fputc('\n', stdout);
 		fflush(stdout);
 	}
 	/* NOTREACHED */
 	return NULL;
 }
 
 static char *
 private_key_passphrase(void)
 {
 	if (identity_passphrase)
 		return xstrdup(identity_passphrase);
 	if (identity_new_passphrase)
 		return xstrdup(identity_new_passphrase);
 
 	return read_check_passphrase(
 	    "Enter passphrase (empty for no passphrase): ",
 	    "Enter same passphrase again: ",
 	    "Passphrases do not match.  Try again.");
 }
 
 static char *
 sk_suffix(const char *application, const uint8_t *user, size_t userlen)
 {
 	char *ret, *cp;
 	size_t slen, i;
 
 	/* Trim off URL-like preamble */
 	if (strncmp(application, "ssh://", 6) == 0)
 		ret =  xstrdup(application + 6);
 	else if (strncmp(application, "ssh:", 4) == 0)
 		ret =  xstrdup(application + 4);
 	else
 		ret = xstrdup(application);
 
 	/* Count trailing zeros in user */
 	for (i = 0; i < userlen; i++) {
 		if (user[userlen - i - 1] != 0)
 			break;
 	}
 	if (i >= userlen)
 		return ret; /* user-id was default all-zeros */
 
 	/* Append user-id, escaping non-UTF-8 characters */
 	slen = userlen - i;
 	if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)
 		fatal_f("asmprintf failed");
 	/* Don't emit a user-id that contains path or control characters */
 	if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||
 	    strchr(cp, '\\') != NULL) {
 		free(cp);
 		cp = tohex(user, slen);
 	}
 	xextendf(&ret, "_", "%s", cp);
 	free(cp);
 	return ret;
 }
 
 static int
 do_download_sk(const char *skprovider, const char *device)
 {
 	struct sshsk_resident_key **srks;
 	size_t nsrks, i;
 	int r, ret = -1;
 	char *fp, *pin = NULL, *pass = NULL, *path, *pubpath;
 	const char *ext;
 	struct sshkey *key;
 
 	if (skprovider == NULL)
 		fatal("Cannot download keys without provider");
 
 	pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
 	if (!quiet) {
 		printf("You may need to touch your authenticator "
 		    "to authorize key download.\n");
 	}
 	if ((r = sshsk_load_resident(skprovider, device, pin, 0,
 	    &srks, &nsrks)) != 0) {
 		if (pin != NULL)
 			freezero(pin, strlen(pin));
 		error_r(r, "Unable to load resident keys");
 		return -1;
 	}
 	if (nsrks == 0)
 		logit("No keys to download");
 	if (pin != NULL)
 		freezero(pin, strlen(pin));
 
 	for (i = 0; i < nsrks; i++) {
 		key = srks[i]->key;
 		if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) {
 			error("Unsupported key type %s (%d)",
 			    sshkey_type(key), key->type);
 			continue;
 		}
 		if ((fp = sshkey_fingerprint(key, fingerprint_hash,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal_f("sshkey_fingerprint failed");
 		debug_f("key %zu: %s %s %s (flags 0x%02x)", i,
 		    sshkey_type(key), fp, key->sk_application, key->sk_flags);
 		ext = sk_suffix(key->sk_application,
 		    srks[i]->user_id, srks[i]->user_id_len);
 		xasprintf(&path, "id_%s_rk%s%s",
 		    key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
 		    *ext == '\0' ? "" : "_", ext);
 
 		/* If the file already exists, ask the user to confirm. */
 		if (!confirm_overwrite(path)) {
 			free(path);
 			break;
 		}
 
 		/* Save the key with the application string as the comment */
 		if (pass == NULL)
 			pass = private_key_passphrase();
 		if ((r = sshkey_save_private(key, path, pass,
 		    key->sk_application, private_key_format,
 		    openssh_format_cipher, rounds)) != 0) {
 			error_r(r, "Saving key \"%s\" failed", path);
 			free(path);
 			break;
 		}
 		if (!quiet) {
 			printf("Saved %s key%s%s to %s\n", sshkey_type(key),
 			    *ext != '\0' ? " " : "",
 			    *ext != '\0' ? key->sk_application : "",
 			    path);
 		}
 
 		/* Save public key too */
 		xasprintf(&pubpath, "%s.pub", path);
 		free(path);
 		if ((r = sshkey_save_public(key, pubpath,
 		    key->sk_application)) != 0) {
 			error_r(r, "Saving public key \"%s\" failed", pubpath);
 			free(pubpath);
 			break;
 		}
 		free(pubpath);
 	}
 
 	if (i >= nsrks)
 		ret = 0; /* success */
 	if (pass != NULL)
 		freezero(pass, strlen(pass));
 	sshsk_free_resident_keys(srks, nsrks);
 	return ret;
 }
 
 static void
 save_attestation(struct sshbuf *attest, const char *path)
 {
 	mode_t omask;
 	int r;
 
 	if (path == NULL)
 		return; /* nothing to do */
 	if (attest == NULL || sshbuf_len(attest) == 0)
 		fatal("Enrollment did not return attestation data");
 	omask = umask(077);
 	r = sshbuf_write_file(path, attest);
 	umask(omask);
 	if (r != 0)
 		fatal_r(r, "Unable to write attestation data \"%s\"", path);
 	if (!quiet)
 		printf("Your FIDO attestation certificate has been saved in "
 		    "%s\n", path);
 }
 
 static int
 confirm_sk_overwrite(const char *application, const char *user)
 {
 	char yesno[3];
 
 	printf("A resident key scoped to '%s' with user id '%s' already "
 	    "exists.\n", application == NULL ? "ssh:" : application,
 	    user == NULL ? "null" : user);
 	printf("Overwrite key in token (y/n)? ");
 	fflush(stdout);
 	if (fgets(yesno, sizeof(yesno), stdin) == NULL)
 		return 0;
 	if (yesno[0] != 'y' && yesno[0] != 'Y')
 		return 0;
 	return 1;
 }
 
 static void
 usage(void)
 {
 	fprintf(stderr,
 	    "usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"
 	    "                  [-m format] [-N new_passphrase] [-O option]\n"
 	    "                  [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
 	    "                  [-w provider] [-Z cipher]\n"
 	    "       ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n"
 	    "                   [-P old_passphrase] [-Z cipher]\n"
 #ifdef WITH_OPENSSL
 	    "       ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
 	    "       ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
 #endif
 	    "       ssh-keygen -y [-f input_keyfile]\n"
 	    "       ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n"
 	    "       ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
 	    "       ssh-keygen -B [-f input_keyfile]\n");
 #ifdef ENABLE_PKCS11
 	fprintf(stderr,
 	    "       ssh-keygen -D pkcs11\n");
 #endif
 	fprintf(stderr,
 	    "       ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
 	    "       ssh-keygen -H [-f known_hosts_file]\n"
 	    "       ssh-keygen -K [-a rounds] [-w provider]\n"
 	    "       ssh-keygen -R hostname [-f known_hosts_file]\n"
 	    "       ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
 #ifdef WITH_OPENSSL
 	    "       ssh-keygen -M generate [-O option] output_file\n"
 	    "       ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
 #endif
 	    "       ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
 	    "                  [-n principals] [-O option] [-V validity_interval]\n"
 	    "                  [-z serial_number] file ...\n"
 	    "       ssh-keygen -L [-f input_keyfile]\n"
 	    "       ssh-keygen -A [-a rounds] [-f prefix_path]\n"
 	    "       ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
 	    "                  file ...\n"
 	    "       ssh-keygen -Q [-l] -f krl_file [file ...]\n"
 	    "       ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
 	    "       ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n"
 	    "       ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
 	    "       ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n"
 	    "       ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
 	    "                  -n namespace -s signature_file [-r krl_file] [-O option]\n");
 	exit(1);
 }
 
 /*
  * Main program for key management.
  */
 int
 main(int argc, char **argv)
 {
 	char comment[1024], *passphrase = NULL;
 	char *rr_hostname = NULL, *ep, *fp, *ra;
 	struct sshkey *private, *public;
 	struct passwd *pw;
 	int r, opt, type;
 	int change_passphrase = 0, change_comment = 0, show_cert = 0;
 	int find_host = 0, delete_host = 0, hash_hosts = 0;
 	int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
 	int prefer_agent = 0, convert_to = 0, convert_from = 0;
 	int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
 	int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
 	unsigned long long cert_serial = 0;
 	char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
 	char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
 	char *sk_attestation_path = NULL;
 	struct sshbuf *challenge = NULL, *attest = NULL;
 	size_t i, nopts = 0;
 	u_int32_t bits = 0;
 	uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
 	const char *errstr;
 	int log_level = SYSLOG_LEVEL_INFO;
 	char *sign_op = NULL;
 
 	extern int optind;
 	extern char *optarg;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	__progname = ssh_get_progname(argv[0]);
 
 	seed_rng();
 
 	log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
 
 	msetlocale();
 
 	/* we need this for the home * directory.  */
 	pw = getpwuid(getuid());
 	if (!pw)
 		fatal("No user exists for uid %lu", (u_long)getuid());
 	pw = pwcopy(pw);
 	if (gethostname(hostname, sizeof(hostname)) == -1)
 		fatal("gethostname: %s", strerror(errno));
 
 	sk_provider = getenv("SSH_SK_PROVIDER");
 
 	/* Remaining characters: dGjJSTWx */
 	while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
 	    "C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
 	    "a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
 		switch (opt) {
 		case 'A':
 			gen_all_hostkeys = 1;
 			break;
 		case 'b':
 			bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
 			    &errstr);
 			if (errstr)
 				fatal("Bits has bad value %s (%s)",
 					optarg, errstr);
 			break;
 		case 'E':
 			fingerprint_hash = ssh_digest_alg_by_name(optarg);
 			if (fingerprint_hash == -1)
 				fatal("Invalid hash algorithm \"%s\"", optarg);
 			break;
 		case 'F':
 			find_host = 1;
 			rr_hostname = optarg;
 			break;
 		case 'H':
 			hash_hosts = 1;
 			break;
 		case 'I':
 			cert_key_id = optarg;
 			break;
 		case 'R':
 			delete_host = 1;
 			rr_hostname = optarg;
 			break;
 		case 'L':
 			show_cert = 1;
 			break;
 		case 'l':
 			print_fingerprint = 1;
 			break;
 		case 'B':
 			print_bubblebabble = 1;
 			break;
 		case 'm':
 			if (strcasecmp(optarg, "RFC4716") == 0 ||
 			    strcasecmp(optarg, "ssh2") == 0) {
 				convert_format = FMT_RFC4716;
 				break;
 			}
 			if (strcasecmp(optarg, "PKCS8") == 0) {
 				convert_format = FMT_PKCS8;
 				private_key_format = SSHKEY_PRIVATE_PKCS8;
 				break;
 			}
 			if (strcasecmp(optarg, "PEM") == 0) {
 				convert_format = FMT_PEM;
 				private_key_format = SSHKEY_PRIVATE_PEM;
 				break;
 			}
 			fatal("Unsupported conversion format \"%s\"", optarg);
 		case 'n':
 			cert_principals = optarg;
 			break;
 		case 'o':
 			/* no-op; new format is already the default */
 			break;
 		case 'p':
 			change_passphrase = 1;
 			break;
 		case 'c':
 			change_comment = 1;
 			break;
 		case 'f':
 			if (strlcpy(identity_file, optarg,
 			    sizeof(identity_file)) >= sizeof(identity_file))
 				fatal("Identity filename too long");
 			have_identity = 1;
 			break;
 		case 'g':
 			print_generic = 1;
 			break;
 		case 'K':
 			download_sk = 1;
 			break;
 		case 'P':
 			identity_passphrase = optarg;
 			break;
 		case 'N':
 			identity_new_passphrase = optarg;
 			break;
 		case 'Q':
 			check_krl = 1;
 			break;
 		case 'O':
 			opts = xrecallocarray(opts, nopts, nopts + 1,
 			    sizeof(*opts));
 			opts[nopts++] = xstrdup(optarg);
 			break;
 		case 'Z':
 			openssh_format_cipher = optarg;
 			if (cipher_by_name(openssh_format_cipher) == NULL)
 				fatal("Invalid OpenSSH-format cipher '%s'",
 				    openssh_format_cipher);
 			break;
 		case 'C':
 			identity_comment = optarg;
 			break;
 		case 'q':
 			quiet = 1;
 			break;
 		case 'e':
 			/* export key */
 			convert_to = 1;
 			break;
 		case 'h':
 			cert_key_type = SSH2_CERT_TYPE_HOST;
 			certflags_flags = 0;
 			break;
 		case 'k':
 			gen_krl = 1;
 			break;
 		case 'i':
 		case 'X':
 			/* import key */
 			convert_from = 1;
 			break;
 		case 'y':
 			print_public = 1;
 			break;
 		case 's':
 			ca_key_path = optarg;
 			break;
 		case 't':
 			key_type_name = optarg;
 			break;
 		case 'D':
 			pkcs11provider = optarg;
 			break;
 		case 'U':
 			prefer_agent = 1;
 			break;
 		case 'u':
 			update_krl = 1;
 			break;
 		case 'v':
 			if (log_level == SYSLOG_LEVEL_INFO)
 				log_level = SYSLOG_LEVEL_DEBUG1;
 			else {
 				if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
 				    log_level < SYSLOG_LEVEL_DEBUG3)
 					log_level++;
 			}
 			break;
 		case 'r':
 			rr_hostname = optarg;
 			break;
 		case 'a':
 			rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
 			if (errstr)
 				fatal("Invalid number: %s (%s)",
 					optarg, errstr);
 			break;
 		case 'V':
 			parse_cert_times(optarg);
 			break;
 		case 'Y':
 			sign_op = optarg;
 			break;
 		case 'w':
 			sk_provider = optarg;
 			break;
 		case 'z':
 			errno = 0;
 			if (*optarg == '+') {
 				cert_serial_autoinc = 1;
 				optarg++;
 			}
 			cert_serial = strtoull(optarg, &ep, 10);
 			if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
 			    (errno == ERANGE && cert_serial == ULLONG_MAX))
 				fatal("Invalid serial number \"%s\"", optarg);
 			break;
 		case 'M':
 			if (strcmp(optarg, "generate") == 0)
 				do_gen_candidates = 1;
 			else if (strcmp(optarg, "screen") == 0)
 				do_screen_candidates = 1;
 			else
 				fatal("Unsupported moduli option %s", optarg);
 			break;
 		default:
 			usage();
 		}
 	}
 
 #ifdef ENABLE_SK_INTERNAL
 	if (sk_provider == NULL)
 		sk_provider = "internal";
 #endif
 
 	/* reinit */
 	log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
 
 	argv += optind;
 	argc -= optind;
 
 	if (sign_op != NULL) {
 		if (strncmp(sign_op, "find-principals", 15) == 0) {
 			if (ca_key_path == NULL) {
 				error("Too few arguments for find-principals:"
 				    "missing signature file");
 				exit(1);
 			}
 			if (!have_identity) {
 				error("Too few arguments for find-principals:"
 				    "missing allowed keys file");
 				exit(1);
 			}
 			return sig_find_principals(ca_key_path, identity_file,
 			    opts, nopts);
 		} else if (strncmp(sign_op, "match-principals", 16) == 0) {
 			if (!have_identity) {
 				error("Too few arguments for match-principals:"
 				    "missing allowed keys file");
 				exit(1);
 			}
 			if (cert_key_id == NULL) {
 				error("Too few arguments for match-principals: "
 				    "missing principal ID");
 				exit(1);
 			}
 			return sig_match_principals(identity_file, cert_key_id,
 			    opts, nopts);
 		} else if (strncmp(sign_op, "sign", 4) == 0) {
 			/* NB. cert_principals is actually namespace, via -n */
 			if (cert_principals == NULL ||
 			    *cert_principals == '\0') {
 				error("Too few arguments for sign: "
 				    "missing namespace");
 				exit(1);
 			}
 			if (!have_identity) {
 				error("Too few arguments for sign: "
 				    "missing key");
 				exit(1);
 			}
 			return sig_sign(identity_file, cert_principals,
 			    prefer_agent, argc, argv, opts, nopts);
 		} else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
 			/* NB. cert_principals is actually namespace, via -n */
 			if (cert_principals == NULL ||
 			    *cert_principals == '\0') {
 				error("Too few arguments for check-novalidate: "
 				    "missing namespace");
 				exit(1);
 			}
 			if (ca_key_path == NULL) {
 				error("Too few arguments for check-novalidate: "
 				    "missing signature file");
 				exit(1);
 			}
 			return sig_verify(ca_key_path, cert_principals,
 			    NULL, NULL, NULL, opts, nopts);
 		} else if (strncmp(sign_op, "verify", 6) == 0) {
 			/* NB. cert_principals is actually namespace, via -n */
 			if (cert_principals == NULL ||
 			    *cert_principals == '\0') {
 				error("Too few arguments for verify: "
 				    "missing namespace");
 				exit(1);
 			}
 			if (ca_key_path == NULL) {
 				error("Too few arguments for verify: "
 				    "missing signature file");
 				exit(1);
 			}
 			if (!have_identity) {
 				error("Too few arguments for sign: "
 				    "missing allowed keys file");
 				exit(1);
 			}
 			if (cert_key_id == NULL) {
 				error("Too few arguments for verify: "
 				    "missing principal identity");
 				exit(1);
 			}
 			return sig_verify(ca_key_path, cert_principals,
 			    cert_key_id, identity_file, rr_hostname,
 			    opts, nopts);
 		}
 		error("Unsupported operation for -Y: \"%s\"", sign_op);
 		usage();
 		/* NOTREACHED */
 	}
 
 	if (ca_key_path != NULL) {
 		if (argc < 1 && !gen_krl) {
 			error("Too few arguments.");
 			usage();
 		}
 	} else if (argc > 0 && !gen_krl && !check_krl &&
 	    !do_gen_candidates && !do_screen_candidates) {
 		error("Too many arguments.");
 		usage();
 	}
 	if (change_passphrase && change_comment) {
 		error("Can only have one of -p and -c.");
 		usage();
 	}
 	if (print_fingerprint && (delete_host || hash_hosts)) {
 		error("Cannot use -l with -H or -R.");
 		usage();
 	}
 	if (gen_krl) {
 		do_gen_krl(pw, update_krl, ca_key_path,
 		    cert_serial, identity_comment, argc, argv);
 		return (0);
 	}
 	if (check_krl) {
 		do_check_krl(pw, print_fingerprint, argc, argv);
 		return (0);
 	}
 	if (ca_key_path != NULL) {
 		if (cert_key_id == NULL)
 			fatal("Must specify key id (-I) when certifying");
 		for (i = 0; i < nopts; i++)
 			add_cert_option(opts[i]);
 		do_ca_sign(pw, ca_key_path, prefer_agent,
 		    cert_serial, cert_serial_autoinc, argc, argv);
 	}
 	if (show_cert)
 		do_show_cert(pw);
 	if (delete_host || hash_hosts || find_host) {
 		do_known_hosts(pw, rr_hostname, find_host,
 		    delete_host, hash_hosts);
 	}
 	if (pkcs11provider != NULL)
 		do_download(pw);
 	if (download_sk) {
 		for (i = 0; i < nopts; i++) {
 			if (strncasecmp(opts[i], "device=", 7) == 0) {
 				sk_device = xstrdup(opts[i] + 7);
 			} else {
 				fatal("Option \"%s\" is unsupported for "
 				    "FIDO authenticator download", opts[i]);
 			}
 		}
 		return do_download_sk(sk_provider, sk_device);
 	}
 	if (print_fingerprint || print_bubblebabble)
 		do_fingerprint(pw);
 	if (change_passphrase)
 		do_change_passphrase(pw);
 	if (change_comment)
 		do_change_comment(pw, identity_comment);
 #ifdef WITH_OPENSSL
 	if (convert_to)
 		do_convert_to(pw);
 	if (convert_from)
 		do_convert_from(pw);
 #else /* WITH_OPENSSL */
 	if (convert_to || convert_from)
 		fatal("key conversion disabled at compile time");
 #endif /* WITH_OPENSSL */
 	if (print_public)
 		do_print_public(pw);
 	if (rr_hostname != NULL) {
 		unsigned int n = 0;
 
 		if (have_identity) {
 			n = do_print_resource_record(pw, identity_file,
 			    rr_hostname, print_generic, opts, nopts);
 			if (n == 0)
 				fatal("%s: %s", identity_file, strerror(errno));
 			exit(0);
 		} else {
 
 			n += do_print_resource_record(pw,
 			    _PATH_HOST_RSA_KEY_FILE, rr_hostname,
 			    print_generic, opts, nopts);
+#ifdef WITH_DSA
 			n += do_print_resource_record(pw,
 			    _PATH_HOST_DSA_KEY_FILE, rr_hostname,
 			    print_generic, opts, nopts);
+#endif
 			n += do_print_resource_record(pw,
 			    _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
 			    print_generic, opts, nopts);
 			n += do_print_resource_record(pw,
 			    _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
 			    print_generic, opts, nopts);
 			n += do_print_resource_record(pw,
 			    _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
 			    print_generic, opts, nopts);
 			if (n == 0)
 				fatal("no keys found.");
 			exit(0);
 		}
 	}
 
 	if (do_gen_candidates || do_screen_candidates) {
 		if (argc <= 0)
 			fatal("No output file specified");
 		else if (argc > 1)
 			fatal("Too many output files specified");
 	}
 	if (do_gen_candidates) {
 		do_moduli_gen(argv[0], opts, nopts);
 		return 0;
 	}
 	if (do_screen_candidates) {
 		do_moduli_screen(argv[0], opts, nopts);
 		return 0;
 	}
 
 	if (gen_all_hostkeys) {
 		do_gen_all_hostkeys(pw);
 		return (0);
 	}
 
 	if (key_type_name == NULL)
 		key_type_name = DEFAULT_KEY_TYPE_NAME;
 
 	type = sshkey_type_from_name(key_type_name);
 	type_bits_valid(type, key_type_name, &bits);
 
 	if (!quiet)
 		printf("Generating public/private %s key pair.\n",
 		    key_type_name);
 	switch (type) {
 	case KEY_ECDSA_SK:
 	case KEY_ED25519_SK:
 		for (i = 0; i < nopts; i++) {
 			if (strcasecmp(opts[i], "no-touch-required") == 0) {
 				sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
 			} else if (strcasecmp(opts[i], "verify-required") == 0) {
 				sk_flags |= SSH_SK_USER_VERIFICATION_REQD;
 			} else if (strcasecmp(opts[i], "resident") == 0) {
 				sk_flags |= SSH_SK_RESIDENT_KEY;
 			} else if (strncasecmp(opts[i], "device=", 7) == 0) {
 				sk_device = xstrdup(opts[i] + 7);
 			} else if (strncasecmp(opts[i], "user=", 5) == 0) {
 				sk_user = xstrdup(opts[i] + 5);
 			} else if (strncasecmp(opts[i], "challenge=", 10) == 0) {
 				if ((r = sshbuf_load_file(opts[i] + 10,
 				    &challenge)) != 0) {
 					fatal_r(r, "Unable to load FIDO "
 					    "enrollment challenge \"%s\"",
 					    opts[i] + 10);
 				}
 			} else if (strncasecmp(opts[i],
 			    "write-attestation=", 18) == 0) {
 				sk_attestation_path = opts[i] + 18;
 			} else if (strncasecmp(opts[i],
 			    "application=", 12) == 0) {
 				sk_application = xstrdup(opts[i] + 12);
 				if (strncmp(sk_application, "ssh:", 4) != 0) {
 					fatal("FIDO application string must "
 					    "begin with \"ssh:\"");
 				}
 			} else {
 				fatal("Option \"%s\" is unsupported for "
 				    "FIDO authenticator enrollment", opts[i]);
 			}
 		}
 		if ((attest = sshbuf_new()) == NULL)
 			fatal("sshbuf_new failed");
 		r = 0;
 		for (i = 0 ;;) {
 			if (!quiet) {
 				printf("You may need to touch your "
 				    "authenticator%s to authorize key "
 				    "generation.\n",
 				    r == 0 ? "" : " again");
 			}
 			fflush(stdout);
 			r = sshsk_enroll(type, sk_provider, sk_device,
 			    sk_application == NULL ? "ssh:" : sk_application,
 			    sk_user, sk_flags, passphrase, challenge,
 			    &private, attest);
 			if (r == 0)
 				break;
 			if (r == SSH_ERR_KEY_BAD_PERMISSIONS &&
 			    (sk_flags & SSH_SK_RESIDENT_KEY) != 0 &&
 			    (sk_flags & SSH_SK_FORCE_OPERATION) == 0 &&
 			    confirm_sk_overwrite(sk_application, sk_user)) {
 				sk_flags |= SSH_SK_FORCE_OPERATION;
 				continue;
 			}
 			if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
 				fatal_r(r, "Key enrollment failed");
 			else if (passphrase != NULL) {
 				error("PIN incorrect");
 				freezero(passphrase, strlen(passphrase));
 				passphrase = NULL;
 			}
 			if (++i >= 3)
 				fatal("Too many incorrect PINs");
 			passphrase = read_passphrase("Enter PIN for "
 			    "authenticator: ", RP_ALLOW_STDIN);
 		}
 		if (passphrase != NULL) {
 			freezero(passphrase, strlen(passphrase));
 			passphrase = NULL;
 		}
 		break;
 	default:
 		if ((r = sshkey_generate(type, bits, &private)) != 0)
 			fatal("sshkey_generate failed");
 		break;
 	}
 	if ((r = sshkey_from_private(private, &public)) != 0)
 		fatal_r(r, "sshkey_from_private");
 
 	if (!have_identity)
 		ask_filename(pw, "Enter file in which to save the key");
 
 	/* Create ~/.ssh directory if it doesn't already exist. */
 	hostfile_create_user_ssh_dir(identity_file, !quiet);
 
 	/* If the file already exists, ask the user to confirm. */
 	if (!confirm_overwrite(identity_file))
 		exit(1);
 
 	/* Determine the passphrase for the private key */
 	passphrase = private_key_passphrase();
 	if (identity_comment) {
 		strlcpy(comment, identity_comment, sizeof(comment));
 	} else {
 		/* Create default comment field for the passphrase. */
 		snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
 	}
 
 	/* Save the key with the given passphrase and comment. */
 	if ((r = sshkey_save_private(private, identity_file, passphrase,
 	    comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
 		error_r(r, "Saving key \"%s\" failed", identity_file);
 		freezero(passphrase, strlen(passphrase));
 		exit(1);
 	}
 	freezero(passphrase, strlen(passphrase));
 	sshkey_free(private);
 
 	if (!quiet) {
 		printf("Your identification has been saved in %s\n",
 		    identity_file);
 	}
 
 	strlcat(identity_file, ".pub", sizeof(identity_file));
 	if ((r = sshkey_save_public(public, identity_file, comment)) != 0)
 		fatal_r(r, "Unable to save public key to %s", identity_file);
 
 	if (!quiet) {
 		fp = sshkey_fingerprint(public, fingerprint_hash,
 		    SSH_FP_DEFAULT);
 		ra = sshkey_fingerprint(public, fingerprint_hash,
 		    SSH_FP_RANDOMART);
 		if (fp == NULL || ra == NULL)
 			fatal("sshkey_fingerprint failed");
 		printf("Your public key has been saved in %s\n",
 		    identity_file);
 		printf("The key fingerprint is:\n");
 		printf("%s %s\n", fp, comment);
 		printf("The key's randomart image is:\n");
 		printf("%s\n", ra);
 		free(ra);
 		free(fp);
 	}
 
 	if (sk_attestation_path != NULL)
 		save_attestation(attest, sk_attestation_path);
 
 	sshbuf_free(attest);
 	sshkey_free(public);
 
 	exit(0);
 }
diff --git a/ssh-keyscan.0 b/ssh-keyscan.0
index ee737884eda7..e2055e7c06ee 100644
--- a/ssh-keyscan.0
+++ b/ssh-keyscan.0
@@ -1,121 +1,121 @@
 SSH-KEYSCAN(1)              General Commands Manual             SSH-KEYSCAN(1)
 
 NAME
      ssh-keyscan M-bM-^@M-^S gather SSH public keys from servers
 
 SYNOPSIS
      ssh-keyscan [-46cDHv] [-f file] [-O option] [-p port] [-T timeout]
                  [-t type] [host | addrlist namelist]
 
 DESCRIPTION
      ssh-keyscan is a utility for gathering the public SSH host keys of a
      number of hosts.  It was designed to aid in building and verifying
      ssh_known_hosts files, the format of which is documented in sshd(8).
      ssh-keyscan provides a minimal interface suitable for use by shell and
      perl scripts.
 
      ssh-keyscan uses non-blocking socket I/O to contact as many hosts as
      possible in parallel, so it is very efficient.  The keys from a domain of
      1,000 hosts can be collected in tens of seconds, even when some of those
      hosts are down or do not run sshd(8).  For scanning, one does not need
      login access to the machines that are being scanned, nor does the
      scanning process involve any encryption.
 
      Hosts to be scanned may be specified by hostname, address or by CIDR
      network range (e.g. 192.168.16/28).  If a network range is specified,
      then all addresses in that range will be scanned.
 
      The options are as follows:
 
      -4      Force ssh-keyscan to use IPv4 addresses only.
 
      -6      Force ssh-keyscan to use IPv6 addresses only.
 
      -c      Request certificates from target hosts instead of plain keys.
 
      -D      Print keys found as SSHFP DNS records.  The default is to print
              keys in a format usable as a ssh(1) known_hosts file.
 
      -f file
              Read hosts or M-bM-^@M-^\addrlist namelistM-bM-^@M-^] pairs from file, one per line.
              If M-bM-^@M-^X-M-bM-^@M-^Y is supplied instead of a filename, ssh-keyscan will read
              from the standard input.  Names read from a file must start with
              an address, hostname or CIDR network range to be scanned.
              Addresses and hostnames may optionally be followed by comma-
              separated name or address aliases that will be copied to the
              output.  For example:
 
              192.168.11.0/24
              10.20.1.1
              happy.example.org
              10.0.0.1,sad.example.org
 
      -H      Hash all hostnames and addresses in the output.  Hashed names may
              be used normally by ssh(1) and sshd(8), but they do not reveal
              identifying information should the file's contents be disclosed.
 
      -O option
              Specify a key/value option.  At present, only a single option is
              supported:
 
              hashalg=algorithm
                      Selects a hash algorithm to use when printing SSHFP
                      records using the -D flag.  Valid algorithms are M-bM-^@M-^\sha1M-bM-^@M-^]
                      and M-bM-^@M-^\sha256M-bM-^@M-^].  The default is to print both.
 
      -p port
              Connect to port on the remote host.
 
      -T timeout
              Set the timeout for connection attempts.  If timeout seconds have
              elapsed since a connection was initiated to a host or since the
              last time anything was read from that host, the connection is
              closed and the host in question considered unavailable.  The
              default is 5 seconds.
 
      -t type
              Specify the type of the key to fetch from the scanned hosts.  The
              possible values are M-bM-^@M-^\dsaM-bM-^@M-^], M-bM-^@M-^\ecdsaM-bM-^@M-^], M-bM-^@M-^\ed25519M-bM-^@M-^], M-bM-^@M-^\ecdsa-skM-bM-^@M-^],
              M-bM-^@M-^\ed25519-skM-bM-^@M-^], or M-bM-^@M-^\rsaM-bM-^@M-^].  Multiple values may be specified by
              separating them with commas.  The default is to fetch M-bM-^@M-^\rsaM-bM-^@M-^],
              M-bM-^@M-^\ecdsaM-bM-^@M-^], M-bM-^@M-^\ed25519M-bM-^@M-^], M-bM-^@M-^\ecdsa-skM-bM-^@M-^], and M-bM-^@M-^\ed25519-skM-bM-^@M-^] keys.
 
      -v      Verbose mode: print debugging messages about progress.
 
      If an ssh_known_hosts file is constructed using ssh-keyscan without
      verifying the keys, users will be vulnerable to man in the middle
      attacks.  On the other hand, if the security model allows such a risk,
      ssh-keyscan can help in the detection of tampered keyfiles or man in the
      middle attacks which have begun after the ssh_known_hosts file was
      created.
 
 FILES
      /etc/ssh/ssh_known_hosts
 
 EXAMPLES
      Print the RSA host key for machine hostname:
 
            $ ssh-keyscan -t rsa hostname
 
      Search a network range, printing all supported key types:
 
            $ ssh-keyscan 192.168.0.64/25
 
      Find all hosts from the file ssh_hosts which have new or different keys
      from those in the sorted file ssh_known_hosts:
 
            $ ssh-keyscan -t rsa,dsa,ecdsa,ed25519 -f ssh_hosts | \
                    sort -u - ssh_known_hosts | diff ssh_known_hosts -
 
 SEE ALSO
      ssh(1), sshd(8)
 
      Using DNS to Securely Publish Secure Shell (SSH) Key Fingerprints, RFC
      4255, 2006.
 
 AUTHORS
      David Mazieres <dm@lcs.mit.edu> wrote the initial version, and Wayne
      Davison <wayned@users.sourceforge.net> added support for protocol version
      2.
 
-OpenBSD 7.3                    February 10, 2023                   OpenBSD 7.3
+OpenBSD 7.5                    February 10, 2023                   OpenBSD 7.5
diff --git a/ssh-keyscan.c b/ssh-keyscan.c
index 1d2df709b70d..f2e6b59e38fd 100644
--- a/ssh-keyscan.c
+++ b/ssh-keyscan.c
@@ -1,890 +1,892 @@
-/* $OpenBSD: ssh-keyscan.c,v 1.153 2023/06/21 05:06:04 djm Exp $ */
+/* $OpenBSD: ssh-keyscan.c,v 1.155 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
  *
  * Modification and redistribution in source and binary forms is
  * permitted provided that due credit is given to the author and the
  * OpenBSD project by leaving this copyright notice intact.
  */
 
 #include "includes.h"
  
 #include <sys/types.h>
 #include "openbsd-compat/sys-queue.h"
 #include <sys/resource.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/bn.h>
 #endif
 
 #include <limits.h>
 #include <netdb.h>
 #include <errno.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "sshbuf.h"
 #include "sshkey.h"
 #include "cipher.h"
 #include "digest.h"
 #include "kex.h"
 #include "compat.h"
 #include "myproposal.h"
 #include "packet.h"
 #include "dispatch.h"
 #include "log.h"
 #include "atomicio.h"
 #include "misc.h"
 #include "hostfile.h"
 #include "ssherr.h"
 #include "ssh_api.h"
 #include "dns.h"
 #include "addr.h"
 
 /* Flag indicating whether IPv4 or IPv6.  This can be set on the command line.
    Default value is AF_UNSPEC means both IPv4 and IPv6. */
 int IPv4or6 = AF_UNSPEC;
 
 int ssh_port = SSH_DEFAULT_PORT;
 
 #define KT_DSA		(1)
 #define KT_RSA		(1<<1)
 #define KT_ECDSA	(1<<2)
 #define KT_ED25519	(1<<3)
 #define KT_XMSS		(1<<4)
 #define KT_ECDSA_SK	(1<<5)
 #define KT_ED25519_SK	(1<<6)
 
 #define KT_MIN		KT_DSA
 #define KT_MAX		KT_ED25519_SK
 
 int get_cert = 0;
 int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519|KT_ECDSA_SK|KT_ED25519_SK;
 
 int hash_hosts = 0;		/* Hash hostname on output */
 
 int print_sshfp = 0;		/* Print SSHFP records instead of known_hosts */
 
 int found_one = 0;		/* Successfully found a key */
 
 int hashalg = -1;		/* Hash for SSHFP records or -1 for all */
 
 #define MAXMAXFD 256
 
 /* The number of seconds after which to give up on a TCP connection */
 int timeout = 5;
 
 int maxfd;
 #define MAXCON (maxfd - 10)
 
 extern char *__progname;
 struct pollfd *read_wait;
 int ncon;
 
 /*
  * Keep a connection structure for each file descriptor.  The state
  * associated with file descriptor n is held in fdcon[n].
  */
 typedef struct Connection {
 	u_char c_status;	/* State of connection on this file desc. */
 #define CS_UNUSED 0		/* File descriptor unused */
 #define CS_CON 1		/* Waiting to connect/read greeting */
 #define CS_SIZE 2		/* Waiting to read initial packet size */
 #define CS_KEYS 3		/* Waiting to read public key packet */
 	int c_fd;		/* Quick lookup: c->c_fd == c - fdcon */
 	int c_plen;		/* Packet length field for ssh packet */
 	int c_len;		/* Total bytes which must be read. */
 	int c_off;		/* Length of data read so far. */
 	int c_keytype;		/* Only one of KT_* */
 	sig_atomic_t c_done;	/* SSH2 done */
 	char *c_namebase;	/* Address to free for c_name and c_namelist */
 	char *c_name;		/* Hostname of connection for errors */
 	char *c_namelist;	/* Pointer to other possible addresses */
 	char *c_output_name;	/* Hostname of connection for output */
 	char *c_data;		/* Data read from this fd */
 	struct ssh *c_ssh;	/* SSH-connection */
 	struct timespec c_ts;	/* Time at which connection gets aborted */
 	TAILQ_ENTRY(Connection) c_link;	/* List of connections in timeout order. */
 } con;
 
 TAILQ_HEAD(conlist, Connection) tq;	/* Timeout Queue */
 con *fdcon;
 
 static void keyprint(con *c, struct sshkey *key);
 
 static int
 fdlim_get(int hard)
 {
 #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
 	struct rlimit rlfd;
 	rlim_t lim;
 
 	if (getrlimit(RLIMIT_NOFILE, &rlfd) == -1)
 		return -1;
 	lim = hard ? rlfd.rlim_max : rlfd.rlim_cur;
 	if (lim <= 0)
 		return -1;
 	if (lim == RLIM_INFINITY)
 		lim = SSH_SYSFDMAX;
 	if (lim >= INT_MAX)
 		lim = INT_MAX;
 	return lim;
 #else
 	return (SSH_SYSFDMAX <= 0) ? -1 :
 	    ((SSH_SYSFDMAX >= INT_MAX) ? INT_MAX : SSH_SYSFDMAX);
 #endif
 }
 
 static int
 fdlim_set(int lim)
 {
 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
 	struct rlimit rlfd;
 #endif
 
 	if (lim <= 0)
 		return (-1);
 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
 	if (getrlimit(RLIMIT_NOFILE, &rlfd) == -1)
 		return (-1);
 	rlfd.rlim_cur = lim;
 	if (setrlimit(RLIMIT_NOFILE, &rlfd) == -1)
 		return (-1);
 #elif defined (HAVE_SETDTABLESIZE)
 	setdtablesize(lim);
 #endif
 	return (0);
 }
 
 /*
  * This is an strsep function that returns a null field for adjacent
  * separators.  This is the same as the 4.4BSD strsep, but different from the
  * one in the GNU libc.
  */
 static char *
 xstrsep(char **str, const char *delim)
 {
 	char *s, *e;
 
 	if (!**str)
 		return (NULL);
 
 	s = *str;
 	e = s + strcspn(s, delim);
 
 	if (*e != '\0')
 		*e++ = '\0';
 	*str = e;
 
 	return (s);
 }
 
 /*
  * Get the next non-null token (like GNU strsep).  Strsep() will return a
  * null token for two adjacent separators, so we may have to loop.
  */
 static char *
 strnnsep(char **stringp, char *delim)
 {
 	char *tok;
 
 	do {
 		tok = xstrsep(stringp, delim);
 	} while (tok && *tok == '\0');
 	return (tok);
 }
 
 
 static int
 key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh)
 {
 	con *c;
 
 	if ((c = ssh_get_app_data(ssh)) != NULL)
 		keyprint(c, hostkey);
 	/* always abort key exchange */
 	return -1;
 }
 
 static int
 ssh2_capable(int remote_major, int remote_minor)
 {
 	switch (remote_major) {
 	case 1:
 		if (remote_minor == 99)
 			return 1;
 		break;
 	case 2:
 		return 1;
 	default:
 		break;
 	}
 	return 0;
 }
 
 static void
 keygrab_ssh2(con *c)
 {
 	char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
 	int r;
 
 	switch (c->c_keytype) {
 	case KT_DSA:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "ssh-dss-cert-v01@openssh.com" : "ssh-dss";
 		break;
 	case KT_RSA:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "rsa-sha2-512-cert-v01@openssh.com,"
 		    "rsa-sha2-256-cert-v01@openssh.com,"
 		    "ssh-rsa-cert-v01@openssh.com" :
 		    "rsa-sha2-512,"
 		    "rsa-sha2-256,"
 		    "ssh-rsa";
 		break;
 	case KT_ED25519:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "ssh-ed25519-cert-v01@openssh.com" : "ssh-ed25519";
 		break;
 	case KT_XMSS:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "ssh-xmss-cert-v01@openssh.com" : "ssh-xmss@openssh.com";
 		break;
 	case KT_ECDSA:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "ecdsa-sha2-nistp256-cert-v01@openssh.com,"
 		    "ecdsa-sha2-nistp384-cert-v01@openssh.com,"
 		    "ecdsa-sha2-nistp521-cert-v01@openssh.com" :
 		    "ecdsa-sha2-nistp256,"
 		    "ecdsa-sha2-nistp384,"
 		    "ecdsa-sha2-nistp521";
 		break;
 	case KT_ECDSA_SK:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" :
 		    "sk-ecdsa-sha2-nistp256@openssh.com";
 		break;
 	case KT_ED25519_SK:
 		myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
 		    "sk-ssh-ed25519-cert-v01@openssh.com" :
 		    "sk-ssh-ed25519@openssh.com";
 		break;
 	default:
 		fatal("unknown key type %d", c->c_keytype);
 		break;
 	}
 	if ((r = kex_setup(c->c_ssh, myproposal)) != 0) {
 		free(c->c_ssh);
 		fprintf(stderr, "kex_setup: %s\n", ssh_err(r));
 		exit(1);
 	}
 #ifdef WITH_OPENSSL
 	c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
 	c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
 # ifdef OPENSSL_HAS_ECC
 	c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kex_gen_client;
 # endif
 #endif
 	c->c_ssh->kex->kex[KEX_C25519_SHA256] = kex_gen_client;
 	c->c_ssh->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_client;
 	ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper);
 	/*
 	 * do the key-exchange until an error occurs or until
 	 * the key_print_wrapper() callback sets c_done.
 	 */
 	ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done);
 }
 
 static void
 keyprint_one(const char *host, struct sshkey *key)
 {
 	char *hostport = NULL, *hashed = NULL;
 	const char *known_host;
 	int r = 0;
 
 	found_one = 1;
 
 	if (print_sshfp) {
 		export_dns_rr(host, key, stdout, 0, hashalg);
 		return;
 	}
 
 	hostport = put_host_port(host, ssh_port);
 	lowercase(hostport);
 	if (hash_hosts && (hashed = host_hash(hostport, NULL, 0)) == NULL)
 		fatal("host_hash failed");
 	known_host = hash_hosts ? hashed : hostport;
 	if (!get_cert)
 		r = fprintf(stdout, "%s ", known_host);
 	if (r >= 0 && sshkey_write(key, stdout) == 0)
 		(void)fputs("\n", stdout);
 	free(hashed);
 	free(hostport);
 }
 
 static void
 keyprint(con *c, struct sshkey *key)
 {
 	char *hosts = c->c_output_name ? c->c_output_name : c->c_name;
 	char *host, *ohosts;
 
 	if (key == NULL)
 		return;
 	if (get_cert || (!hash_hosts && ssh_port == SSH_DEFAULT_PORT)) {
 		keyprint_one(hosts, key);
 		return;
 	}
 	ohosts = hosts = xstrdup(hosts);
 	while ((host = strsep(&hosts, ",")) != NULL)
 		keyprint_one(host, key);
 	free(ohosts);
 }
 
 static int
 tcpconnect(char *host)
 {
 	struct addrinfo hints, *ai, *aitop;
 	char strport[NI_MAXSERV];
 	int gaierr, s = -1;
 
 	snprintf(strport, sizeof strport, "%d", ssh_port);
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = IPv4or6;
 	hints.ai_socktype = SOCK_STREAM;
 	if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) {
 		error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
 		return -1;
 	}
 	for (ai = aitop; ai; ai = ai->ai_next) {
 		s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 		if (s == -1) {
 			error("socket: %s", strerror(errno));
 			continue;
 		}
 		if (set_nonblock(s) == -1)
 			fatal_f("set_nonblock(%d)", s);
 		if (connect(s, ai->ai_addr, ai->ai_addrlen) == -1 &&
 		    errno != EINPROGRESS)
 			error("connect (`%s'): %s", host, strerror(errno));
 		else
 			break;
 		close(s);
 		s = -1;
 	}
 	freeaddrinfo(aitop);
 	return s;
 }
 
 static int
 conalloc(const char *iname, const char *oname, int keytype)
 {
 	char *namebase, *name, *namelist;
 	int s;
 
 	namebase = namelist = xstrdup(iname);
 
 	do {
 		name = xstrsep(&namelist, ",");
 		if (!name) {
 			free(namebase);
 			return (-1);
 		}
 	} while ((s = tcpconnect(name)) < 0);
 
 	if (s >= maxfd)
 		fatal("conalloc: fdno %d too high", s);
 	if (fdcon[s].c_status)
 		fatal("conalloc: attempt to reuse fdno %d", s);
 
 	debug3_f("oname %s kt %d", oname, keytype);
 	fdcon[s].c_fd = s;
 	fdcon[s].c_status = CS_CON;
 	fdcon[s].c_namebase = namebase;
 	fdcon[s].c_name = name;
 	fdcon[s].c_namelist = namelist;
 	fdcon[s].c_output_name = xstrdup(oname);
 	fdcon[s].c_data = (char *) &fdcon[s].c_plen;
 	fdcon[s].c_len = 4;
 	fdcon[s].c_off = 0;
 	fdcon[s].c_keytype = keytype;
 	monotime_ts(&fdcon[s].c_ts);
 	fdcon[s].c_ts.tv_sec += timeout;
 	TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
 	read_wait[s].fd = s;
 	read_wait[s].events = POLLIN;
 	ncon++;
 	return (s);
 }
 
 static void
 confree(int s)
 {
 	if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
 		fatal("confree: attempt to free bad fdno %d", s);
 	free(fdcon[s].c_namebase);
 	free(fdcon[s].c_output_name);
 	if (fdcon[s].c_status == CS_KEYS)
 		free(fdcon[s].c_data);
 	fdcon[s].c_status = CS_UNUSED;
 	fdcon[s].c_keytype = 0;
 	if (fdcon[s].c_ssh) {
 		ssh_packet_close(fdcon[s].c_ssh);
 		free(fdcon[s].c_ssh);
 		fdcon[s].c_ssh = NULL;
 	} else
 		close(s);
 	TAILQ_REMOVE(&tq, &fdcon[s], c_link);
 	read_wait[s].fd = -1;
 	read_wait[s].events = 0;
 	ncon--;
 }
 
 static void
 contouch(int s)
 {
 	TAILQ_REMOVE(&tq, &fdcon[s], c_link);
 	monotime_ts(&fdcon[s].c_ts);
 	fdcon[s].c_ts.tv_sec += timeout;
 	TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
 }
 
 static int
 conrecycle(int s)
 {
 	con *c = &fdcon[s];
 	int ret;
 
 	ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
 	confree(s);
 	return (ret);
 }
 
 static void
 congreet(int s)
 {
 	int n = 0, remote_major = 0, remote_minor = 0;
 	char buf[256], *cp;
 	char remote_version[sizeof buf];
 	size_t bufsiz;
 	con *c = &fdcon[s];
 
 	/* send client banner */
 	n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
 	    PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2);
 	if (n < 0 || (size_t)n >= sizeof(buf)) {
 		error("snprintf: buffer too small");
 		confree(s);
 		return;
 	}
 	if (atomicio(vwrite, s, buf, n) != (size_t)n) {
 		error("write (%s): %s", c->c_name, strerror(errno));
 		confree(s);
 		return;
 	}
 
 	/*
 	 * Read the server banner as per RFC4253 section 4.2.  The "SSH-"
-	 * protocol identification string may be preceeded by an arbitrarily
+	 * protocol identification string may be preceded by an arbitrarily
 	 * large banner which we must read and ignore.  Loop while reading
 	 * newline-terminated lines until we have one starting with "SSH-".
 	 * The ID string cannot be longer than 255 characters although the
-	 * preceeding banner lines may (in which case they'll be discarded
+	 * preceding banner lines may (in which case they'll be discarded
 	 * in multiple iterations of the outer loop).
 	 */
 	for (;;) {
 		memset(buf, '\0', sizeof(buf));
 		bufsiz = sizeof(buf);
 		cp = buf;
 		while (bufsiz-- &&
 		    (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
 			if (*cp == '\r')
 				*cp = '\n';
 			cp++;
 		}
 		if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
 			break;
 	}
 	if (n == 0) {
 		switch (errno) {
 		case EPIPE:
 			error("%s: Connection closed by remote host", c->c_name);
 			break;
 		case ECONNREFUSED:
 			break;
 		default:
 			error("read (%s): %s", c->c_name, strerror(errno));
 			break;
 		}
 		conrecycle(s);
 		return;
 	}
 	if (cp >= buf + sizeof(buf)) {
 		error("%s: greeting exceeds allowable length", c->c_name);
 		confree(s);
 		return;
 	}
 	if (*cp != '\n' && *cp != '\r') {
 		error("%s: bad greeting", c->c_name);
 		confree(s);
 		return;
 	}
 	*cp = '\0';
 	if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL)
 		fatal("ssh_packet_set_connection failed");
 	ssh_packet_set_timeout(c->c_ssh, timeout, 1);
 	ssh_set_app_data(c->c_ssh, c);	/* back link */
 	c->c_ssh->compat = 0;
 	if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
 	    &remote_major, &remote_minor, remote_version) == 3)
 		compat_banner(c->c_ssh, remote_version);
 	if (!ssh2_capable(remote_major, remote_minor)) {
 		debug("%s doesn't support ssh2", c->c_name);
 		confree(s);
 		return;
 	}
 	fprintf(stderr, "%c %s:%d %s\n", print_sshfp ? ';' : '#',
 	    c->c_name, ssh_port, chop(buf));
 	keygrab_ssh2(c);
 	confree(s);
 }
 
 static void
 conread(int s)
 {
 	con *c = &fdcon[s];
 	size_t n;
 
 	if (c->c_status == CS_CON) {
 		congreet(s);
 		return;
 	}
 	n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
 	if (n == 0) {
 		error("read (%s): %s", c->c_name, strerror(errno));
 		confree(s);
 		return;
 	}
 	c->c_off += n;
 
 	if (c->c_off == c->c_len)
 		switch (c->c_status) {
 		case CS_SIZE:
 			c->c_plen = htonl(c->c_plen);
 			c->c_len = c->c_plen + 8 - (c->c_plen & 7);
 			c->c_off = 0;
 			c->c_data = xmalloc(c->c_len);
 			c->c_status = CS_KEYS;
 			break;
 		default:
 			fatal("conread: invalid status %d", c->c_status);
 			break;
 		}
 
 	contouch(s);
 }
 
 static void
 conloop(void)
 {
 	struct timespec seltime, now;
 	con *c;
 	int i;
 
 	monotime_ts(&now);
 	c = TAILQ_FIRST(&tq);
 
 	if (c && timespeccmp(&c->c_ts, &now, >))
 		timespecsub(&c->c_ts, &now, &seltime);
 	else
 		timespecclear(&seltime);
 
 	while (ppoll(read_wait, maxfd, &seltime, NULL) == -1) {
 		if (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)
 			continue;
 		error("poll error");
 	}
 
 	for (i = 0; i < maxfd; i++) {
 		if (read_wait[i].revents & (POLLHUP|POLLERR|POLLNVAL))
 			confree(i);
 		else if (read_wait[i].revents & (POLLIN|POLLHUP))
 			conread(i);
 	}
 
 	c = TAILQ_FIRST(&tq);
 	while (c && timespeccmp(&c->c_ts, &now, <)) {
 		int s = c->c_fd;
 
 		c = TAILQ_NEXT(c, c_link);
 		conrecycle(s);
 	}
 }
 
 static void
 do_one_host(char *host)
 {
 	char *name = strnnsep(&host, " \t\n");
 	int j;
 
 	if (name == NULL)
 		return;
 	for (j = KT_MIN; j <= KT_MAX; j *= 2) {
 		if (get_keytypes & j) {
 			while (ncon >= MAXCON)
 				conloop();
 			conalloc(name, *host ? host : name, j);
 		}
 	}
 }
 
 static void
 do_host(char *host)
 {
 	char daddr[128];
 	struct xaddr addr, end_addr;
 	u_int masklen;
 
 	if (host == NULL)
 		return;
 	if (addr_pton_cidr(host, &addr, &masklen) != 0) {
 		/* Assume argument is a hostname */
 		do_one_host(host);
 	} else {
 		/* Argument is a CIDR range */
 		debug("CIDR range %s", host);
 		end_addr = addr;
 		if (addr_host_to_all1s(&end_addr, masklen) != 0)
 			goto badaddr;
 		/*
 		 * Note: we deliberately include the all-zero/ones addresses.
 		 */
 		for (;;) {
 			if (addr_ntop(&addr, daddr, sizeof(daddr)) != 0) {
  badaddr:
 				error("Invalid address %s", host);
 				return;
 			}
 			debug("CIDR expand: address %s", daddr);
 			do_one_host(daddr);
 			if (addr_cmp(&addr, &end_addr) == 0)
 				break;
 			addr_increment(&addr);
 		};
 	}
 }
 
 void
 sshfatal(const char *file, const char *func, int line, int showfunc,
     LogLevel level, const char *suffix, const char *fmt, ...)
 {
 	va_list args;
 
 	va_start(args, fmt);
 	sshlogv(file, func, line, showfunc, level, suffix, fmt, args);
 	va_end(args);
 	cleanup_exit(255);
 }
 
 static void
 usage(void)
 {
 	fprintf(stderr,
 	    "usage: ssh-keyscan [-46cDHv] [-f file] [-O option] [-p port] [-T timeout]\n"
 	    "                   [-t type] [host | addrlist namelist]\n");
 	exit(1);
 }
 
 int
 main(int argc, char **argv)
 {
 	int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
 	int opt, fopt_count = 0, j;
 	char *tname, *cp, *line = NULL;
 	size_t linesize = 0;
 	FILE *fp;
 
 	extern int optind;
 	extern char *optarg;
 
 	__progname = ssh_get_progname(argv[0]);
 	seed_rng();
 	TAILQ_INIT(&tq);
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	if (argc <= 1)
 		usage();
 
 	while ((opt = getopt(argc, argv, "cDHv46O:p:T:t:f:")) != -1) {
 		switch (opt) {
 		case 'H':
 			hash_hosts = 1;
 			break;
 		case 'c':
 			get_cert = 1;
 			break;
 		case 'D':
 			print_sshfp = 1;
 			break;
 		case 'p':
 			ssh_port = a2port(optarg);
 			if (ssh_port <= 0) {
 				fprintf(stderr, "Bad port '%s'\n", optarg);
 				exit(1);
 			}
 			break;
 		case 'T':
 			timeout = convtime(optarg);
 			if (timeout == -1 || timeout == 0) {
 				fprintf(stderr, "Bad timeout '%s'\n", optarg);
 				usage();
 			}
 			break;
 		case 'v':
 			if (!debug_flag) {
 				debug_flag = 1;
 				log_level = SYSLOG_LEVEL_DEBUG1;
 			}
 			else if (log_level < SYSLOG_LEVEL_DEBUG3)
 				log_level++;
 			else
 				fatal("Too high debugging level.");
 			break;
 		case 'f':
 			if (strcmp(optarg, "-") == 0)
 				optarg = NULL;
 			argv[fopt_count++] = optarg;
 			break;
 		case 'O':
 			/* Maybe other misc options in the future too */
 			if (strncmp(optarg, "hashalg=", 8) != 0)
 				fatal("Unsupported -O option");
 			if ((hashalg = ssh_digest_alg_by_name(
 			    optarg + 8)) == -1)
 				fatal("Unsupported hash algorithm");
 			break;
 		case 't':
 			get_keytypes = 0;
 			tname = strtok(optarg, ",");
 			while (tname) {
 				int type = sshkey_type_from_name(tname);
 
 				switch (type) {
+#ifdef WITH_DSA
 				case KEY_DSA:
 					get_keytypes |= KT_DSA;
 					break;
+#endif
 				case KEY_ECDSA:
 					get_keytypes |= KT_ECDSA;
 					break;
 				case KEY_RSA:
 					get_keytypes |= KT_RSA;
 					break;
 				case KEY_ED25519:
 					get_keytypes |= KT_ED25519;
 					break;
 				case KEY_XMSS:
 					get_keytypes |= KT_XMSS;
 					break;
 				case KEY_ED25519_SK:
 					get_keytypes |= KT_ED25519_SK;
 					break;
 				case KEY_ECDSA_SK:
 					get_keytypes |= KT_ECDSA_SK;
 					break;
 				case KEY_UNSPEC:
 				default:
 					fatal("Unknown key type \"%s\"", tname);
 				}
 				tname = strtok(NULL, ",");
 			}
 			break;
 		case '4':
 			IPv4or6 = AF_INET;
 			break;
 		case '6':
 			IPv4or6 = AF_INET6;
 			break;
 		default:
 			usage();
 		}
 	}
 	if (optind == argc && !fopt_count)
 		usage();
 
 	log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
 
 	maxfd = fdlim_get(1);
 	if (maxfd < 0)
 		fatal("%s: fdlim_get: bad value", __progname);
 	if (maxfd > MAXMAXFD)
 		maxfd = MAXMAXFD;
 	if (MAXCON <= 0)
 		fatal("%s: not enough file descriptors", __progname);
 	if (maxfd > fdlim_get(0))
 		fdlim_set(maxfd);
 	fdcon = xcalloc(maxfd, sizeof(con));
 	read_wait = xcalloc(maxfd, sizeof(struct pollfd));
 	for (j = 0; j < maxfd; j++)
 		read_wait[j].fd = -1;
 
 	for (j = 0; j < fopt_count; j++) {
 		if (argv[j] == NULL)
 			fp = stdin;
 		else if ((fp = fopen(argv[j], "r")) == NULL)
 			fatal("%s: %s: %s", __progname, argv[j], strerror(errno));
 
 		while (getline(&line, &linesize, fp) != -1) {
 			/* Chomp off trailing whitespace and comments */
 			if ((cp = strchr(line, '#')) == NULL)
 				cp = line + strlen(line) - 1;
 			while (cp >= line) {
 				if (*cp == ' ' || *cp == '\t' ||
 				    *cp == '\n' || *cp == '#')
 					*cp-- = '\0';
 				else
 					break;
 			}
 
 			/* Skip empty lines */
 			if (*line == '\0')
 				continue;
 
 			do_host(line);
 		}
 
 		if (ferror(fp))
 			fatal("%s: %s: %s", __progname, argv[j], strerror(errno));
 
 		fclose(fp);
 	}
 	free(line);
 
 	while (optind < argc)
 		do_host(argv[optind++]);
 
 	while (ncon > 0)
 		conloop();
 
 	return found_one ? 0 : 1;
 }
diff --git a/ssh-keysign.0 b/ssh-keysign.0
index 71fa63b729a6..c7fe6c8a34d2 100644
--- a/ssh-keysign.0
+++ b/ssh-keysign.0
@@ -1,52 +1,52 @@
 SSH-KEYSIGN(8)              System Manager's Manual             SSH-KEYSIGN(8)
 
 NAME
      ssh-keysign M-bM-^@M-^S OpenSSH helper for host-based authentication
 
 SYNOPSIS
      ssh-keysign
 
 DESCRIPTION
      ssh-keysign is used by ssh(1) to access the local host keys and generate
      the digital signature required during host-based authentication.
 
      ssh-keysign is disabled by default and can only be enabled in the global
      client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign
      to M-bM-^@M-^\yesM-bM-^@M-^].
 
      ssh-keysign is not intended to be invoked by the user, but from ssh(1).
      See ssh(1) and sshd(8) for more information about host-based
      authentication.
 
 FILES
      /etc/ssh/ssh_config
              Controls whether ssh-keysign is enabled.
 
      /etc/ssh/ssh_host_dsa_key
      /etc/ssh/ssh_host_ecdsa_key
      /etc/ssh/ssh_host_ed25519_key
      /etc/ssh/ssh_host_rsa_key
              These files contain the private parts of the host keys used to
              generate the digital signature.  They should be owned by root,
              readable only by root, and not accessible to others.  Since they
              are readable only by root, ssh-keysign must be set-uid root if
              host-based authentication is used.
 
      /etc/ssh/ssh_host_dsa_key-cert.pub
      /etc/ssh/ssh_host_ecdsa_key-cert.pub
      /etc/ssh/ssh_host_ed25519_key-cert.pub
      /etc/ssh/ssh_host_rsa_key-cert.pub
              If these files exist, they are assumed to contain public
              certificate information corresponding with the private keys
              above.
 
 SEE ALSO
      ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)
 
 HISTORY
      ssh-keysign first appeared in OpenBSD 3.2.
 
 AUTHORS
      Markus Friedl <markus@openbsd.org>
 
-OpenBSD 7.3                     March 31, 2022                     OpenBSD 7.3
+OpenBSD 7.5                     March 31, 2022                     OpenBSD 7.5
diff --git a/ssh-keysign.c b/ssh-keysign.c
index b989f5e941ad..c54a4bbb7983 100644
--- a/ssh-keysign.c
+++ b/ssh-keysign.c
@@ -1,306 +1,311 @@
-/* $OpenBSD: ssh-keysign.c,v 1.71 2022/08/01 11:09:26 djm Exp $ */
+/* $OpenBSD: ssh-keysign.c,v 1.73 2024/01/11 01:51:16 djm Exp $ */
 /*
  * Copyright (c) 2002 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <fcntl.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #include <pwd.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include <openssl/rand.h>
 #include <openssl/rsa.h>
 #include "openbsd-compat/openssl-compat.h"
 #endif
 
 #include "xmalloc.h"
 #include "log.h"
 #include "sshkey.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "misc.h"
 #include "sshbuf.h"
 #include "authfile.h"
 #include "msg.h"
 #include "canohost.h"
 #include "pathnames.h"
 #include "readconf.h"
 #include "uidswap.h"
 #include "ssherr.h"
 
 extern char *__progname;
 
 static int
 valid_request(struct passwd *pw, char *host, struct sshkey **ret, char **pkalgp,
     u_char *data, size_t datalen)
 {
 	struct sshbuf *b;
 	struct sshkey *key = NULL;
 	u_char type, *pkblob;
 	char *p;
 	size_t blen, len;
 	char *pkalg, *luser;
 	int r, pktype, fail;
 
 	if (ret != NULL)
 		*ret = NULL;
 	if (pkalgp != NULL)
 		*pkalgp = NULL;
 	fail = 0;
 
 	if ((b = sshbuf_from(data, datalen)) == NULL)
 		fatal_f("sshbuf_from failed");
 
 	/* session id */
 	if ((r = sshbuf_get_string(b, NULL, &len)) != 0)
 		fatal_fr(r, "parse session ID");
 	if (len != 20 && /* SHA1 */
 	    len != 32 && /* SHA256 */
 	    len != 48 && /* SHA384 */
 	    len != 64)   /* SHA512 */
 		fail++;
 
 	if ((r = sshbuf_get_u8(b, &type)) != 0)
 		fatal_fr(r, "parse type");
 	if (type != SSH2_MSG_USERAUTH_REQUEST)
 		fail++;
 
 	/* server user */
 	if ((r = sshbuf_skip_string(b)) != 0)
 		fatal_fr(r, "parse user");
 
 	/* service */
 	if ((r = sshbuf_get_cstring(b, &p, NULL)) != 0)
 		fatal_fr(r, "parse service");
 	if (strcmp("ssh-connection", p) != 0)
 		fail++;
 	free(p);
 
 	/* method */
 	if ((r = sshbuf_get_cstring(b, &p, NULL)) != 0)
 		fatal_fr(r, "parse method");
 	if (strcmp("hostbased", p) != 0)
 		fail++;
 	free(p);
 
 	/* pubkey */
 	if ((r = sshbuf_get_cstring(b, &pkalg, NULL)) != 0 ||
 	    (r = sshbuf_get_string(b, &pkblob, &blen)) != 0)
 		fatal_fr(r, "parse pk");
 
 	pktype = sshkey_type_from_name(pkalg);
 	if (pktype == KEY_UNSPEC)
 		fail++;
 	else if ((r = sshkey_from_blob(pkblob, blen, &key)) != 0) {
 		error_fr(r, "decode key");
 		fail++;
 	} else if (key->type != pktype)
 		fail++;
 
 	/* client host name, handle trailing dot */
 	if ((r = sshbuf_get_cstring(b, &p, &len)) != 0)
 		fatal_fr(r, "parse hostname");
 	debug2_f("check expect chost %s got %s", host, p);
 	if (strlen(host) != len - 1)
 		fail++;
 	else if (p[len - 1] != '.')
 		fail++;
 	else if (strncasecmp(host, p, len - 1) != 0)
 		fail++;
 	free(p);
 
 	/* local user */
 	if ((r = sshbuf_get_cstring(b, &luser, NULL)) != 0)
 		fatal_fr(r, "parse luser");
 
 	if (strcmp(pw->pw_name, luser) != 0)
 		fail++;
 	free(luser);
 
 	/* end of message */
 	if (sshbuf_len(b) != 0)
 		fail++;
 	sshbuf_free(b);
 
 	debug3_f("fail %d", fail);
 
 	if (!fail) {
 		if (ret != NULL) {
 			*ret = key;
 			key = NULL;
 		}
 		if (pkalgp != NULL) {
 			*pkalgp = pkalg;
 			pkalg = NULL;
 		}
 	}
 	sshkey_free(key);
 	free(pkalg);
 	free(pkblob);
 
 	return (fail ? -1 : 0);
 }
 
 int
 main(int argc, char **argv)
 {
 	struct sshbuf *b;
 	Options options;
 #define NUM_KEYTYPES 5
 	struct sshkey *keys[NUM_KEYTYPES], *key = NULL;
 	struct passwd *pw;
 	int r, key_fd[NUM_KEYTYPES], i, found, version = 2, fd;
 	u_char *signature, *data, rver;
 	char *host, *fp, *pkalg;
 	size_t slen, dlen;
 
 	if (pledge("stdio rpath getpw dns id", NULL) != 0)
 		fatal("%s: pledge: %s", __progname, strerror(errno));
 
 	/* Ensure that stdin and stdout are connected */
 	if ((fd = open(_PATH_DEVNULL, O_RDWR)) < 2)
 		exit(1);
 	/* Leave /dev/null fd iff it is attached to stderr */
 	if (fd > 2)
 		close(fd);
 
+	for (i = 0; i < NUM_KEYTYPES; i++)
+		key_fd[i] = -1;
+
 	i = 0;
 	/* XXX This really needs to read sshd_config for the paths */
+#ifdef WITH_DSA
 	key_fd[i++] = open(_PATH_HOST_DSA_KEY_FILE, O_RDONLY);
+#endif
 	key_fd[i++] = open(_PATH_HOST_ECDSA_KEY_FILE, O_RDONLY);
 	key_fd[i++] = open(_PATH_HOST_ED25519_KEY_FILE, O_RDONLY);
 	key_fd[i++] = open(_PATH_HOST_XMSS_KEY_FILE, O_RDONLY);
 	key_fd[i++] = open(_PATH_HOST_RSA_KEY_FILE, O_RDONLY);
 
 	if ((pw = getpwuid(getuid())) == NULL)
 		fatal("getpwuid failed");
 	pw = pwcopy(pw);
 
 	permanently_set_uid(pw);
 
 	seed_rng();
 
 #ifdef DEBUG_SSH_KEYSIGN
 	log_init("ssh-keysign", SYSLOG_LEVEL_DEBUG3, SYSLOG_FACILITY_AUTH, 0);
 #endif
 
 	/* verify that ssh-keysign is enabled by the admin */
 	initialize_options(&options);
 	(void)read_config_file(_PATH_HOST_CONFIG_FILE, pw, "", "",
 	    &options, 0, NULL);
 	(void)fill_default_options(&options);
 	if (options.enable_ssh_keysign != 1)
 		fatal("ssh-keysign not enabled in %s",
 		    _PATH_HOST_CONFIG_FILE);
 
 	if (pledge("stdio dns", NULL) != 0)
 		fatal("%s: pledge: %s", __progname, strerror(errno));
 
 	for (i = found = 0; i < NUM_KEYTYPES; i++) {
 		if (key_fd[i] != -1)
 			found = 1;
 	}
 	if (found == 0)
 		fatal("could not open any host key");
 
 	found = 0;
 	for (i = 0; i < NUM_KEYTYPES; i++) {
 		keys[i] = NULL;
 		if (key_fd[i] == -1)
 			continue;
 		r = sshkey_load_private_type_fd(key_fd[i], KEY_UNSPEC,
 		    NULL, &key, NULL);
 		close(key_fd[i]);
 		if (r != 0)
 			debug_r(r, "parse key %d", i);
 		else if (key != NULL) {
 			keys[i] = key;
 			found = 1;
 		}
 	}
 	if (!found)
 		fatal("no hostkey found");
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal("%s: sshbuf_new failed", __progname);
 	if (ssh_msg_recv(STDIN_FILENO, b) < 0)
 		fatal("%s: ssh_msg_recv failed", __progname);
 	if ((r = sshbuf_get_u8(b, &rver)) != 0)
 		fatal_r(r, "%s: buffer error", __progname);
 	if (rver != version)
 		fatal("%s: bad version: received %d, expected %d",
 		    __progname, rver, version);
 	if ((r = sshbuf_get_u32(b, (u_int *)&fd)) != 0)
 		fatal_r(r, "%s: buffer error", __progname);
 	if (fd < 0 || fd == STDIN_FILENO || fd == STDOUT_FILENO)
 		fatal("%s: bad fd = %d", __progname, fd);
 	if ((host = get_local_name(fd)) == NULL)
 		fatal("%s: cannot get local name for fd", __progname);
 
 	if ((r = sshbuf_get_string(b, &data, &dlen)) != 0)
 		fatal_r(r, "%s: buffer error", __progname);
 	if (valid_request(pw, host, &key, &pkalg, data, dlen) < 0)
 		fatal("%s: not a valid request", __progname);
 	free(host);
 
 	found = 0;
 	for (i = 0; i < NUM_KEYTYPES; i++) {
 		if (keys[i] != NULL &&
 		    sshkey_equal_public(key, keys[i])) {
 			found = 1;
 			break;
 		}
 	}
 	if (!found) {
 		if ((fp = sshkey_fingerprint(key, options.fingerprint_hash,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal("%s: sshkey_fingerprint failed", __progname);
 		fatal("%s: no matching hostkey found for key %s %s", __progname,
 		    sshkey_type(key), fp ? fp : "");
 	}
 
 	if ((r = sshkey_sign(keys[i], &signature, &slen, data, dlen,
 	    pkalg, NULL, NULL, 0)) != 0)
 		fatal_r(r, "%s: sshkey_sign failed", __progname);
 	free(data);
 
 	/* send reply */
 	sshbuf_reset(b);
 	if ((r = sshbuf_put_string(b, signature, slen)) != 0)
 		fatal_r(r, "%s: buffer error", __progname);
 	if (ssh_msg_send(STDOUT_FILENO, version, b) == -1)
 		fatal("%s: ssh_msg_send failed", __progname);
 
 	return (0);
 }
diff --git a/ssh-pkcs11-client.c b/ssh-pkcs11-client.c
index 82e86a518443..5fa8bf02b3da 100644
--- a/ssh-pkcs11-client.c
+++ b/ssh-pkcs11-client.c
@@ -1,654 +1,656 @@
 /* $OpenBSD: ssh-pkcs11-client.c,v 1.19 2023/12/18 14:46:56 djm Exp $ */
 /*
  * Copyright (c) 2010 Markus Friedl.  All rights reserved.
  * Copyright (c) 2014 Pedro Martelletto. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include "includes.h"
 
 #ifdef ENABLE_PKCS11
 
 #include <sys/types.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include <sys/socket.h>
 
 #include <stdarg.h>
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 #include <limits.h>
 
 #include <openssl/ecdsa.h>
 #include <openssl/rsa.h>
 
 #include "pathnames.h"
 #include "xmalloc.h"
 #include "sshbuf.h"
 #include "log.h"
 #include "misc.h"
 #include "sshkey.h"
 #include "authfd.h"
 #include "atomicio.h"
 #include "ssh-pkcs11.h"
 #include "ssherr.h"
 
 #include "openbsd-compat/openssl-compat.h"
 
 #if !defined(OPENSSL_HAS_ECC) || !defined(HAVE_EC_KEY_METHOD_NEW)
 #define EC_KEY_METHOD void
 #define EC_KEY void
 #endif
 
 /* borrows code from sftp-server and ssh-agent */
 
 /*
  * Maintain a list of ssh-pkcs11-helper subprocesses. These may be looked up
  * by provider path or their unique EC/RSA METHOD pointers.
  */
 struct helper {
 	char *path;
 	pid_t pid;
 	int fd;
 	RSA_METHOD *rsa_meth;
 	EC_KEY_METHOD *ec_meth;
 	int (*rsa_finish)(RSA *rsa);
 	void (*ec_finish)(EC_KEY *key);
 	size_t nrsa, nec; /* number of active keys of each type */
 };
 static struct helper **helpers;
 static size_t nhelpers;
 
 static struct helper *
 helper_by_provider(const char *path)
 {
 	size_t i;
 
 	for (i = 0; i < nhelpers; i++) {
 		if (helpers[i] == NULL || helpers[i]->path == NULL ||
 		    helpers[i]->fd == -1)
 			continue;
 		if (strcmp(helpers[i]->path, path) == 0)
 			return helpers[i];
 	}
 	return NULL;
 }
 
 static struct helper *
 helper_by_rsa(const RSA *rsa)
 {
 	size_t i;
 	const RSA_METHOD *meth;
 
 	if ((meth = RSA_get_method(rsa)) == NULL)
 		return NULL;
 	for (i = 0; i < nhelpers; i++) {
 		if (helpers[i] != NULL && helpers[i]->rsa_meth == meth)
 			return helpers[i];
 	}
 	return NULL;
 
 }
 
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 static struct helper *
 helper_by_ec(const EC_KEY *ec)
 {
 	size_t i;
 	const EC_KEY_METHOD *meth;
 
 	if ((meth = EC_KEY_get_method(ec)) == NULL)
 		return NULL;
 	for (i = 0; i < nhelpers; i++) {
 		if (helpers[i] != NULL && helpers[i]->ec_meth == meth)
 			return helpers[i];
 	}
 	return NULL;
 
 }
 #endif /* defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW) */
 
 static void
 helper_free(struct helper *helper)
 {
 	size_t i;
 	int found = 0;
 
 	if (helper == NULL)
 		return;
 	if (helper->path == NULL || helper->ec_meth == NULL ||
 	    helper->rsa_meth == NULL)
 		fatal_f("inconsistent helper");
 	debug3_f("free helper for provider %s", helper->path);
 	for (i = 0; i < nhelpers; i++) {
 		if (helpers[i] == helper) {
 			if (found)
 				fatal_f("helper recorded more than once");
 			found = 1;
 		}
 		else if (found)
 			helpers[i - 1] = helpers[i];
 	}
 	if (found) {
 		helpers = xrecallocarray(helpers, nhelpers,
 		    nhelpers - 1, sizeof(*helpers));
 		nhelpers--;
 	}
 	free(helper->path);
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 	EC_KEY_METHOD_free(helper->ec_meth);
 #endif
 	RSA_meth_free(helper->rsa_meth);
 	free(helper);
 }
 
 static void
 helper_terminate(struct helper *helper)
 {
 	if (helper == NULL) {
 		return;
 	} else if (helper->fd == -1) {
 		debug3_f("already terminated");
 	} else {
 		debug3_f("terminating helper for %s; "
 		    "remaining %zu RSA %zu ECDSA",
 		    helper->path, helper->nrsa, helper->nec);
 		close(helper->fd);
 		/* XXX waitpid() */
 		helper->fd = -1;
 		helper->pid = -1;
 	}
 	/*
 	 * Don't delete the helper entry until there are no remaining keys
 	 * that reference it. Otherwise, any signing operation would call
 	 * a free'd METHOD pointer and that would be bad.
 	 */
 	if (helper->nrsa == 0 && helper->nec == 0)
 		helper_free(helper);
 }
 
 static void
 send_msg(int fd, struct sshbuf *m)
 {
 	u_char buf[4];
 	size_t mlen = sshbuf_len(m);
 	int r;
 
 	if (fd == -1)
 		return;
 	POKE_U32(buf, mlen);
 	if (atomicio(vwrite, fd, buf, 4) != 4 ||
 	    atomicio(vwrite, fd, sshbuf_mutable_ptr(m),
 	    sshbuf_len(m)) != sshbuf_len(m))
 		error("write to helper failed");
 	if ((r = sshbuf_consume(m, mlen)) != 0)
 		fatal_fr(r, "consume");
 }
 
 static int
 recv_msg(int fd, struct sshbuf *m)
 {
 	u_int l, len;
 	u_char c, buf[1024];
 	int r;
 
 	sshbuf_reset(m);
 	if (fd == -1)
 		return 0; /* XXX */
 	if ((len = atomicio(read, fd, buf, 4)) != 4) {
 		error("read from helper failed: %u", len);
 		return (0); /* XXX */
 	}
 	len = PEEK_U32(buf);
 	if (len > 256 * 1024)
 		fatal("response too long: %u", len);
 	/* read len bytes into m */
 	while (len > 0) {
 		l = len;
 		if (l > sizeof(buf))
 			l = sizeof(buf);
 		if (atomicio(read, fd, buf, l) != l) {
 			error("response from helper failed.");
 			return (0); /* XXX */
 		}
 		if ((r = sshbuf_put(m, buf, l)) != 0)
 			fatal_fr(r, "sshbuf_put");
 		len -= l;
 	}
 	if ((r = sshbuf_get_u8(m, &c)) != 0)
 		fatal_fr(r, "parse type");
 	return c;
 }
 
 int
 pkcs11_init(int interactive)
 {
 	return 0;
 }
 
 void
 pkcs11_terminate(void)
 {
 	size_t i;
 
 	debug3_f("terminating %zu helpers", nhelpers);
 	for (i = 0; i < nhelpers; i++)
 		helper_terminate(helpers[i]);
 }
 
 static int
 rsa_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, int padding)
 {
 	struct sshkey *key = NULL;
 	struct sshbuf *msg = NULL;
 	u_char *blob = NULL, *signature = NULL;
 	size_t blen, slen = 0;
 	int r, ret = -1;
 	struct helper *helper;
 
 	if ((helper = helper_by_rsa(rsa)) == NULL || helper->fd == -1)
 		fatal_f("no helper for PKCS11 key");
 	debug3_f("signing with PKCS11 provider %s", helper->path);
 	if (padding != RSA_PKCS1_PADDING)
 		goto fail;
 	key = sshkey_new(KEY_UNSPEC);
 	if (key == NULL) {
 		error_f("sshkey_new failed");
 		goto fail;
 	}
 	key->type = KEY_RSA;
 	RSA_up_ref(rsa);
 	key->rsa = rsa;
 	if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) {
 		error_fr(r, "encode key");
 		goto fail;
 	}
 	if ((msg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
 	    (r = sshbuf_put_string(msg, blob, blen)) != 0 ||
 	    (r = sshbuf_put_string(msg, from, flen)) != 0 ||
 	    (r = sshbuf_put_u32(msg, 0)) != 0)
 		fatal_fr(r, "compose");
 	send_msg(helper->fd, msg);
 	sshbuf_reset(msg);
 
 	if (recv_msg(helper->fd, msg) == SSH2_AGENT_SIGN_RESPONSE) {
 		if ((r = sshbuf_get_string(msg, &signature, &slen)) != 0)
 			fatal_fr(r, "parse");
 		if (slen <= (size_t)RSA_size(rsa)) {
 			memcpy(to, signature, slen);
 			ret = slen;
 		}
 		free(signature);
 	}
  fail:
 	free(blob);
 	sshkey_free(key);
 	sshbuf_free(msg);
 	return (ret);
 }
 
 static int
 rsa_finish(RSA *rsa)
 {
 	struct helper *helper;
 
 	if ((helper = helper_by_rsa(rsa)) == NULL)
 		fatal_f("no helper for PKCS11 key");
 	debug3_f("free PKCS11 RSA key for provider %s", helper->path);
 	if (helper->rsa_finish != NULL)
 		helper->rsa_finish(rsa);
 	if (helper->nrsa == 0)
 		fatal_f("RSA refcount error");
 	helper->nrsa--;
 	debug3_f("provider %s remaining keys: %zu RSA %zu ECDSA",
 	    helper->path, helper->nrsa, helper->nec);
 	if (helper->nrsa == 0 && helper->nec == 0)
 		helper_terminate(helper);
 	return 1;
 }
 
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 static ECDSA_SIG *
 ecdsa_do_sign(const unsigned char *dgst, int dgst_len, const BIGNUM *inv,
     const BIGNUM *rp, EC_KEY *ec)
 {
 	struct sshkey *key = NULL;
 	struct sshbuf *msg = NULL;
 	ECDSA_SIG *ret = NULL;
 	const u_char *cp;
 	u_char *blob = NULL, *signature = NULL;
 	size_t blen, slen = 0;
 	int r, nid;
 	struct helper *helper;
 
 	if ((helper = helper_by_ec(ec)) == NULL || helper->fd == -1)
 		fatal_f("no helper for PKCS11 key");
 	debug3_f("signing with PKCS11 provider %s", helper->path);
 	nid = sshkey_ecdsa_key_to_nid(ec);
 	if (nid < 0) {
 		error_f("couldn't get curve nid");
 		goto fail;
 	}
 
 	key = sshkey_new(KEY_UNSPEC);
 	if (key == NULL) {
 		error_f("sshkey_new failed");
 		goto fail;
 	}
 	key->ecdsa = ec;
 	key->ecdsa_nid = nid;
 	key->type = KEY_ECDSA;
 	EC_KEY_up_ref(ec);
 
 	if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) {
 		error_fr(r, "encode key");
 		goto fail;
 	}
 	if ((msg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
 	    (r = sshbuf_put_string(msg, blob, blen)) != 0 ||
 	    (r = sshbuf_put_string(msg, dgst, dgst_len)) != 0 ||
 	    (r = sshbuf_put_u32(msg, 0)) != 0)
 		fatal_fr(r, "compose");
 	send_msg(helper->fd, msg);
 	sshbuf_reset(msg);
 
 	if (recv_msg(helper->fd, msg) == SSH2_AGENT_SIGN_RESPONSE) {
 		if ((r = sshbuf_get_string(msg, &signature, &slen)) != 0)
 			fatal_fr(r, "parse");
 		cp = signature;
 		ret = d2i_ECDSA_SIG(NULL, &cp, slen);
 		free(signature);
 	}
 
  fail:
 	free(blob);
 	sshkey_free(key);
 	sshbuf_free(msg);
 	return (ret);
 }
 
 static void
 ecdsa_do_finish(EC_KEY *ec)
 {
 	struct helper *helper;
 
 	if ((helper = helper_by_ec(ec)) == NULL)
 		fatal_f("no helper for PKCS11 key");
 	debug3_f("free PKCS11 ECDSA key for provider %s", helper->path);
 	if (helper->ec_finish != NULL)
 		helper->ec_finish(ec);
 	if (helper->nec == 0)
 		fatal_f("ECDSA refcount error");
 	helper->nec--;
 	debug3_f("provider %s remaining keys: %zu RSA %zu ECDSA",
 	    helper->path, helper->nrsa, helper->nec);
 	if (helper->nrsa == 0 && helper->nec == 0)
 		helper_terminate(helper);
 }
 #endif /* defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW) */
 
 /* redirect private key crypto operations to the ssh-pkcs11-helper */
 static void
 wrap_key(struct helper *helper, struct sshkey *k)
 {
 	debug3_f("wrap %s for provider %s", sshkey_type(k), helper->path);
 	if (k->type == KEY_RSA) {
 		RSA_set_method(k->rsa, helper->rsa_meth);
 		if (helper->nrsa++ >= INT_MAX)
 			fatal_f("RSA refcount error");
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 	} else if (k->type == KEY_ECDSA) {
 		EC_KEY_set_method(k->ecdsa, helper->ec_meth);
 		if (helper->nec++ >= INT_MAX)
 			fatal_f("EC refcount error");
 #endif
 	} else
 		fatal_f("unknown key type");
 	k->flags |= SSHKEY_FLAG_EXT;
 	debug3_f("provider %s remaining keys: %zu RSA %zu ECDSA",
 	    helper->path, helper->nrsa, helper->nec);
 }
 
 /*
  * Make a private PKCS#11-backed certificate by grafting a previously-loaded
  * PKCS#11 private key and a public certificate key.
  */
 int
 pkcs11_make_cert(const struct sshkey *priv,
     const struct sshkey *certpub, struct sshkey **certprivp)
 {
 	struct helper *helper = NULL;
 	struct sshkey *ret;
 	int r;
 
 	debug3_f("private key type %s cert type %s", sshkey_type(priv),
 	    sshkey_type(certpub));
 	*certprivp = NULL;
 	if (!sshkey_is_cert(certpub) || sshkey_is_cert(priv) ||
 	    !sshkey_equal_public(priv, certpub)) {
 		error_f("private key %s doesn't match cert %s",
 		    sshkey_type(priv), sshkey_type(certpub));
 		return SSH_ERR_INVALID_ARGUMENT;
 	}
 	*certprivp = NULL;
 	if (priv->type == KEY_RSA) {
 		if ((helper = helper_by_rsa(priv->rsa)) == NULL ||
 		    helper->fd == -1)
 			fatal_f("no helper for PKCS11 RSA key");
 		if ((r = sshkey_from_private(priv, &ret)) != 0)
 			fatal_fr(r, "copy key");
 		RSA_set_method(ret->rsa, helper->rsa_meth);
 		if (helper->nrsa++ >= INT_MAX)
 			fatal_f("RSA refcount error");
+#if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 	} else if (priv->type == KEY_ECDSA) {
 		if ((helper = helper_by_ec(priv->ecdsa)) == NULL ||
 		    helper->fd == -1)
 			fatal_f("no helper for PKCS11 EC key");
 		if ((r = sshkey_from_private(priv, &ret)) != 0)
 			fatal_fr(r, "copy key");
 		EC_KEY_set_method(ret->ecdsa, helper->ec_meth);
 		if (helper->nec++ >= INT_MAX)
 			fatal_f("EC refcount error");
+#endif
 	} else
 		fatal_f("unknown key type %s", sshkey_type(priv));
 
 	ret->flags |= SSHKEY_FLAG_EXT;
 	if ((r = sshkey_to_certified(ret)) != 0 ||
 	    (r = sshkey_cert_copy(certpub, ret)) != 0)
 		fatal_fr(r, "graft certificate");
 	debug3_f("provider %s remaining keys: %zu RSA %zu ECDSA",
 	    helper->path, helper->nrsa, helper->nec);
 	/* success */
 	*certprivp = ret;
 	return 0;
 }
 
 static int
 pkcs11_start_helper_methods(struct helper *helper)
 {
 	RSA_METHOD *rsa_meth;
 	EC_KEY_METHOD *ec_meth = NULL;
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 	int (*ec_init)(EC_KEY *key);
 	int (*ec_copy)(EC_KEY *dest, const EC_KEY *src);
 	int (*ec_set_group)(EC_KEY *key, const EC_GROUP *grp);
 	int (*ec_set_private)(EC_KEY *key, const BIGNUM *priv_key);
 	int (*ec_set_public)(EC_KEY *key, const EC_POINT *pub_key);
 	int (*ec_sign)(int, const unsigned char *, int, unsigned char *,
 	    unsigned int *, const BIGNUM *, const BIGNUM *, EC_KEY *) = NULL;
 
 	if ((ec_meth = EC_KEY_METHOD_new(EC_KEY_OpenSSL())) == NULL)
 		return -1;
 	EC_KEY_METHOD_get_sign(ec_meth, &ec_sign, NULL, NULL);
 	EC_KEY_METHOD_set_sign(ec_meth, ec_sign, NULL, ecdsa_do_sign);
 	EC_KEY_METHOD_get_init(ec_meth, &ec_init, &helper->ec_finish,
 	    &ec_copy, &ec_set_group, &ec_set_private, &ec_set_public);
 	EC_KEY_METHOD_set_init(ec_meth, ec_init, ecdsa_do_finish,
 	    ec_copy, ec_set_group, ec_set_private, ec_set_public);
 #endif /* defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW) */
 
 	if ((rsa_meth = RSA_meth_dup(RSA_get_default_method())) == NULL)
 		fatal_f("RSA_meth_dup failed");
 	helper->rsa_finish = RSA_meth_get_finish(rsa_meth);
 	if (!RSA_meth_set1_name(rsa_meth, "ssh-pkcs11-helper") ||
 	    !RSA_meth_set_priv_enc(rsa_meth, rsa_encrypt) ||
 	    !RSA_meth_set_finish(rsa_meth, rsa_finish))
 		fatal_f("failed to prepare method");
 
 	helper->ec_meth = ec_meth;
 	helper->rsa_meth = rsa_meth;
 	return 0;
 }
 
 static struct helper *
 pkcs11_start_helper(const char *path)
 {
 	int pair[2];
 	char *prog, *verbosity = NULL;
 	struct helper *helper;
 	pid_t pid;
 
 	if (nhelpers >= INT_MAX)
 		fatal_f("too many helpers");
 	debug3_f("start helper for %s", path);
 	if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) {
 		error_f("socketpair: %s", strerror(errno));
 		return NULL;
 	}
 	helper = xcalloc(1, sizeof(*helper));
 	if (pkcs11_start_helper_methods(helper) == -1) {
 		error_f("pkcs11_start_helper_methods failed");
 		goto fail;
 	}
 	if ((pid = fork()) == -1) {
 		error_f("fork: %s", strerror(errno));
  fail:
 		close(pair[0]);
 		close(pair[1]);
 		RSA_meth_free(helper->rsa_meth);
 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
 		EC_KEY_METHOD_free(helper->ec_meth);
 #endif
 		free(helper);
 		return NULL;
 	} else if (pid == 0) {
 		if ((dup2(pair[1], STDIN_FILENO) == -1) ||
 		    (dup2(pair[1], STDOUT_FILENO) == -1)) {
 			fprintf(stderr, "dup2: %s\n", strerror(errno));
 			_exit(1);
 		}
 		close(pair[0]);
 		close(pair[1]);
 		prog = getenv("SSH_PKCS11_HELPER");
 		if (prog == NULL || strlen(prog) == 0)
 			prog = _PATH_SSH_PKCS11_HELPER;
 		if (log_level_get() >= SYSLOG_LEVEL_DEBUG1)
 			verbosity = "-vvv";
 		debug_f("starting %s %s", prog,
 		    verbosity == NULL ? "" : verbosity);
 		execlp(prog, prog, verbosity, (char *)NULL);
 		fprintf(stderr, "exec: %s: %s\n", prog, strerror(errno));
 		_exit(1);
 	}
 	close(pair[1]);
 	helper->fd = pair[0];
 	helper->path = xstrdup(path);
 	helper->pid = pid;
 	debug3_f("helper %zu for \"%s\" on fd %d pid %ld", nhelpers,
 	    helper->path, helper->fd, (long)helper->pid);
 	helpers = xrecallocarray(helpers, nhelpers,
 	    nhelpers + 1, sizeof(*helpers));
 	helpers[nhelpers++] = helper;
 	return helper;
 }
 
 int
 pkcs11_add_provider(char *name, char *pin, struct sshkey ***keysp,
     char ***labelsp)
 {
 	struct sshkey *k;
 	int r, type;
 	u_char *blob;
 	char *label;
 	size_t blen;
 	u_int nkeys, i;
 	struct sshbuf *msg;
 	struct helper *helper;
 
 	if ((helper = helper_by_provider(name)) == NULL &&
 	    (helper = pkcs11_start_helper(name)) == NULL)
 		return -1;
 
 	if ((msg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if ((r = sshbuf_put_u8(msg, SSH_AGENTC_ADD_SMARTCARD_KEY)) != 0 ||
 	    (r = sshbuf_put_cstring(msg, name)) != 0 ||
 	    (r = sshbuf_put_cstring(msg, pin)) != 0)
 		fatal_fr(r, "compose");
 	send_msg(helper->fd, msg);
 	sshbuf_reset(msg);
 
 	type = recv_msg(helper->fd, msg);
 	if (type == SSH2_AGENT_IDENTITIES_ANSWER) {
 		if ((r = sshbuf_get_u32(msg, &nkeys)) != 0)
 			fatal_fr(r, "parse nkeys");
 		*keysp = xcalloc(nkeys, sizeof(struct sshkey *));
 		if (labelsp)
 			*labelsp = xcalloc(nkeys, sizeof(char *));
 		for (i = 0; i < nkeys; i++) {
 			/* XXX clean up properly instead of fatal() */
 			if ((r = sshbuf_get_string(msg, &blob, &blen)) != 0 ||
 			    (r = sshbuf_get_cstring(msg, &label, NULL)) != 0)
 				fatal_fr(r, "parse key");
 			if ((r = sshkey_from_blob(blob, blen, &k)) != 0)
 				fatal_fr(r, "decode key");
 			wrap_key(helper, k);
 			(*keysp)[i] = k;
 			if (labelsp)
 				(*labelsp)[i] = label;
 			else
 				free(label);
 			free(blob);
 		}
 	} else if (type == SSH2_AGENT_FAILURE) {
 		if ((r = sshbuf_get_u32(msg, &nkeys)) != 0)
 			nkeys = -1;
 	} else {
 		nkeys = -1;
 	}
 	sshbuf_free(msg);
 	return (nkeys);
 }
 
 int
 pkcs11_del_provider(char *name)
 {
 	struct helper *helper;
 
 	/*
 	 * ssh-agent deletes keys before calling this, so the helper entry
 	 * should be gone before we get here.
 	 */
 	debug3_f("delete %s", name);
 	if ((helper = helper_by_provider(name)) != NULL)
 		helper_terminate(helper);
 	return 0;
 }
 #endif /* ENABLE_PKCS11 */
diff --git a/ssh-pkcs11-helper.0 b/ssh-pkcs11-helper.0
index 07f7d666146f..5645872592b8 100644
--- a/ssh-pkcs11-helper.0
+++ b/ssh-pkcs11-helper.0
@@ -1,35 +1,35 @@
 SSH-PKCS11-HELPER(8)        System Manager's Manual       SSH-PKCS11-HELPER(8)
 
 NAME
      ssh-pkcs11-helper M-bM-^@M-^S OpenSSH helper for PKCS#11 support
 
 SYNOPSIS
      ssh-pkcs11-helper [-v]
 
 DESCRIPTION
      ssh-pkcs11-helper is used by ssh(1), ssh-agent(1), and ssh-keygen(1) to
      access keys provided by a PKCS#11 token.
 
      ssh-pkcs11-helper is not intended to be invoked directly by the user.
 
      A single option is supported:
 
      -v      Verbose mode.  Causes ssh-pkcs11-helper to print debugging
              messages about its progress.  This is helpful in debugging
              problems.  Multiple -v options increase the verbosity.  The
              maximum is 3.
 
              Note that ssh(1), ssh-agent(1), and ssh-keygen(1) will
              automatically pass the -v flag to ssh-pkcs11-helper when they
              have themselves been placed in debug mode.
 
 SEE ALSO
      ssh(1), ssh-agent(1), ssh-keygen(1)
 
 HISTORY
      ssh-pkcs11-helper first appeared in OpenBSD 4.7.
 
 AUTHORS
      Markus Friedl <markus@openbsd.org>
 
-OpenBSD 7.3                     April 29, 2022                     OpenBSD 7.3
+OpenBSD 7.5                     April 29, 2022                     OpenBSD 7.5
diff --git a/ssh.0 b/ssh.0
index 5b5e2ad64257..f2c32afa4c31 100644
--- a/ssh.0
+++ b/ssh.0
@@ -1,1023 +1,1023 @@
 SSH(1)                      General Commands Manual                     SSH(1)
 
 NAME
      ssh M-bM-^@M-^S OpenSSH remote login client
 
 SYNOPSIS
      ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface] [-b bind_address]
          [-c cipher_spec] [-D [bind_address:]port] [-E log_file]
          [-e escape_char] [-F configfile] [-I pkcs11] [-i identity_file]
          [-J destination] [-L address] [-l login_name] [-m mac_spec]
          [-O ctl_cmd] [-o option] [-P tag] [-p port] [-R address]
          [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]] destination
          [command [argument ...]]
      ssh [-Q query_option]
 
 DESCRIPTION
      ssh (SSH client) is a program for logging into a remote machine and for
      executing commands on a remote machine.  It is intended to provide secure
      encrypted communications between two untrusted hosts over an insecure
      network.  X11 connections, arbitrary TCP ports and UNIX-domain sockets
      can also be forwarded over the secure channel.
 
      ssh connects and logs into the specified destination, which may be
      specified as either [user@]hostname or a URI of the form
      ssh://[user@]hostname[:port].  The user must prove their identity to the
      remote machine using one of several methods (see below).
 
      If a command is specified, it will be executed on the remote host instead
      of a login shell.  A complete command line may be specified as command,
      or it may have additional arguments.  If supplied, the arguments will be
      appended to the command, separated by spaces, before it is sent to the
      server to be executed.
 
      The options are as follows:
 
      -4      Forces ssh to use IPv4 addresses only.
 
      -6      Forces ssh to use IPv6 addresses only.
 
      -A      Enables forwarding of connections from an authentication agent
              such as ssh-agent(1).  This can also be specified on a per-host
              basis in a configuration file.
 
              Agent forwarding should be enabled with caution.  Users with the
              ability to bypass file permissions on the remote host (for the
              agent's UNIX-domain socket) can access the local agent through
              the forwarded connection.  An attacker cannot obtain key material
              from the agent, however they can perform operations on the keys
              that enable them to authenticate using the identities loaded into
              the agent.  A safer alternative may be to use a jump host (see
              -J).
 
      -a      Disables forwarding of the authentication agent connection.
 
      -B bind_interface
              Bind to the address of bind_interface before attempting to
              connect to the destination host.  This is only useful on systems
              with more than one address.
 
      -b bind_address
              Use bind_address on the local machine as the source address of
              the connection.  Only useful on systems with more than one
              address.
 
      -C      Requests compression of all data (including stdin, stdout,
              stderr, and data for forwarded X11, TCP and UNIX-domain
              connections).  The compression algorithm is the same used by
              gzip(1).  Compression is desirable on modem lines and other slow
              connections, but will only slow down things on fast networks.
              The default value can be set on a host-by-host basis in the
              configuration files; see the Compression option in ssh_config(5).
 
      -c cipher_spec
              Selects the cipher specification for encrypting the session.
              cipher_spec is a comma-separated list of ciphers listed in order
              of preference.  See the Ciphers keyword in ssh_config(5) for more
              information.
 
      -D [bind_address:]port
              Specifies a local M-bM-^@M-^\dynamicM-bM-^@M-^] application-level port forwarding.
              This works by allocating a socket to listen to port on the local
              side, optionally bound to the specified bind_address.  Whenever a
              connection is made to this port, the connection is forwarded over
              the secure channel, and the application protocol is then used to
              determine where to connect to from the remote machine.  Currently
              the SOCKS4 and SOCKS5 protocols are supported, and ssh will act
              as a SOCKS server.  Only root can forward privileged ports.
              Dynamic port forwardings can also be specified in the
              configuration file.
 
              IPv6 addresses can be specified by enclosing the address in
              square brackets.  Only the superuser can forward privileged
              ports.  By default, the local port is bound in accordance with
              the GatewayPorts setting.  However, an explicit bind_address may
              be used to bind the connection to a specific address.  The
              bind_address of M-bM-^@M-^\localhostM-bM-^@M-^] indicates that the listening port be
              bound for local use only, while an empty address or M-bM-^@M-^X*M-bM-^@M-^Y indicates
              that the port should be available from all interfaces.
 
      -E log_file
              Append debug logs to log_file instead of standard error.
 
      -e escape_char
              Sets the escape character for sessions with a pty (default: M-bM-^@M-^X~M-bM-^@M-^Y).
              The escape character is only recognized at the beginning of a
              line.  The escape character followed by a dot (M-bM-^@M-^X.M-bM-^@M-^Y) closes the
              connection; followed by control-Z suspends the connection; and
              followed by itself sends the escape character once.  Setting the
              character to M-bM-^@M-^\noneM-bM-^@M-^] disables any escapes and makes the session
              fully transparent.
 
      -F configfile
              Specifies an alternative per-user configuration file.  If a
              configuration file is given on the command line, the system-wide
              configuration file (/etc/ssh/ssh_config) will be ignored.  The
              default for the per-user configuration file is ~/.ssh/config.  If
              set to M-bM-^@M-^\noneM-bM-^@M-^], no configuration files will be read.
 
      -f      Requests ssh to go to background just before command execution.
              This is useful if ssh is going to ask for passwords or
              passphrases, but the user wants it in the background.  This
              implies -n.  The recommended way to start X11 programs at a
              remote site is with something like ssh -f host xterm.
 
              If the ExitOnForwardFailure configuration option is set to M-bM-^@M-^\yesM-bM-^@M-^],
              then a client started with -f will wait for all remote port
              forwards to be successfully established before placing itself in
              the background.  Refer to the description of
              ForkAfterAuthentication in ssh_config(5) for details.
 
      -G      Causes ssh to print its configuration after evaluating Host and
              Match blocks and exit.
 
      -g      Allows remote hosts to connect to local forwarded ports.  If used
              on a multiplexed connection, then this option must be specified
              on the master process.
 
      -I pkcs11
              Specify the PKCS#11 shared library ssh should use to communicate
              with a PKCS#11 token providing keys for user authentication.
 
      -i identity_file
              Selects a file from which the identity (private key) for public
              key authentication is read.  You can also specify a public key
              file to use the corresponding private key that is loaded in
              ssh-agent(1) when the private key file is not present locally.
              The default is ~/.ssh/id_rsa, ~/.ssh/id_ecdsa,
              ~/.ssh/id_ecdsa_sk, ~/.ssh/id_ed25519, ~/.ssh/id_ed25519_sk and
              ~/.ssh/id_dsa.  Identity files may also be specified on a per-
              host basis in the configuration file.  It is possible to have
              multiple -i options (and multiple identities specified in
              configuration files).  If no certificates have been explicitly
              specified by the CertificateFile directive, ssh will also try to
              load certificate information from the filename obtained by
              appending -cert.pub to identity filenames.
 
      -J destination
              Connect to the target host by first making an ssh connection to
              the jump host described by destination and then establishing a
              TCP forwarding to the ultimate destination from there.  Multiple
              jump hops may be specified separated by comma characters.  This
              is a shortcut to specify a ProxyJump configuration directive.
              Note that configuration directives supplied on the command-line
              generally apply to the destination host and not any specified
              jump hosts.  Use ~/.ssh/config to specify configuration for jump
              hosts.
 
      -K      Enables GSSAPI-based authentication and forwarding (delegation)
              of GSSAPI credentials to the server.
 
      -k      Disables forwarding (delegation) of GSSAPI credentials to the
              server.
 
      -L [bind_address:]port:host:hostport
      -L [bind_address:]port:remote_socket
      -L local_socket:host:hostport
      -L local_socket:remote_socket
              Specifies that connections to the given TCP port or Unix socket
              on the local (client) host are to be forwarded to the given host
              and port, or Unix socket, on the remote side.  This works by
              allocating a socket to listen to either a TCP port on the local
              side, optionally bound to the specified bind_address, or to a
              Unix socket.  Whenever a connection is made to the local port or
              socket, the connection is forwarded over the secure channel, and
              a connection is made to either host port hostport, or the Unix
              socket remote_socket, from the remote machine.
 
              Port forwardings can also be specified in the configuration file.
              Only the superuser can forward privileged ports.  IPv6 addresses
              can be specified by enclosing the address in square brackets.
 
              By default, the local port is bound in accordance with the
              GatewayPorts setting.  However, an explicit bind_address may be
              used to bind the connection to a specific address.  The
              bind_address of M-bM-^@M-^\localhostM-bM-^@M-^] indicates that the listening port be
              bound for local use only, while an empty address or M-bM-^@M-^X*M-bM-^@M-^Y indicates
              that the port should be available from all interfaces.
 
      -l login_name
              Specifies the user to log in as on the remote machine.  This also
              may be specified on a per-host basis in the configuration file.
 
      -M      Places the ssh client into M-bM-^@M-^\masterM-bM-^@M-^] mode for connection sharing.
              Multiple -M options places ssh into M-bM-^@M-^\masterM-bM-^@M-^] mode but with
              confirmation required using ssh-askpass(1) before each operation
              that changes the multiplexing state (e.g. opening a new session).
              Refer to the description of ControlMaster in ssh_config(5) for
              details.
 
      -m mac_spec
              A comma-separated list of MAC (message authentication code)
              algorithms, specified in order of preference.  See the MACs
              keyword in ssh_config(5) for more information.
 
      -N      Do not execute a remote command.  This is useful for just
              forwarding ports.  Refer to the description of SessionType in
              ssh_config(5) for details.
 
      -n      Redirects stdin from /dev/null (actually, prevents reading from
              stdin).  This must be used when ssh is run in the background.  A
              common trick is to use this to run X11 programs on a remote
              machine.  For example, ssh -n shadows.cs.hut.fi emacs & will
              start an emacs on shadows.cs.hut.fi, and the X11 connection will
              be automatically forwarded over an encrypted channel.  The ssh
              program will be put in the background.  (This does not work if
              ssh needs to ask for a password or passphrase; see also the -f
              option.)  Refer to the description of StdinNull in ssh_config(5)
              for details.
 
      -O ctl_cmd
              Control an active connection multiplexing master process.  When
              the -O option is specified, the ctl_cmd argument is interpreted
              and passed to the master process.  Valid commands are: M-bM-^@M-^\checkM-bM-^@M-^]
              (check that the master process is running), M-bM-^@M-^\forwardM-bM-^@M-^] (request
              forwardings without command execution), M-bM-^@M-^\cancelM-bM-^@M-^] (cancel
              forwardings), M-bM-^@M-^\exitM-bM-^@M-^] (request the master to exit), and M-bM-^@M-^\stopM-bM-^@M-^]
              (request the master to stop accepting further multiplexing
              requests).
 
      -o option
              Can be used to give options in the format used in the
              configuration file.  This is useful for specifying options for
              which there is no separate command-line flag.  For full details
              of the options listed below, and their possible values, see
              ssh_config(5).
 
                    AddKeysToAgent
                    AddressFamily
                    BatchMode
                    BindAddress
                    CanonicalDomains
                    CanonicalizeFallbackLocal
                    CanonicalizeHostname
                    CanonicalizeMaxDots
                    CanonicalizePermittedCNAMEs
                    CASignatureAlgorithms
                    CertificateFile
                    CheckHostIP
                    Ciphers
                    ClearAllForwardings
                    Compression
                    ConnectionAttempts
                    ConnectTimeout
                    ControlMaster
                    ControlPath
                    ControlPersist
                    DynamicForward
                    EnableEscapeCommandline
                    EscapeChar
                    ExitOnForwardFailure
                    FingerprintHash
                    ForkAfterAuthentication
                    ForwardAgent
                    ForwardX11
                    ForwardX11Timeout
                    ForwardX11Trusted
                    GatewayPorts
                    GlobalKnownHostsFile
                    GSSAPIAuthentication
                    GSSAPIDelegateCredentials
                    HashKnownHosts
                    Host
                    HostbasedAcceptedAlgorithms
                    HostbasedAuthentication
                    HostKeyAlgorithms
                    HostKeyAlias
                    Hostname
                    IdentitiesOnly
                    IdentityAgent
                    IdentityFile
                    IPQoS
                    KbdInteractiveAuthentication
                    KbdInteractiveDevices
                    KexAlgorithms
                    KnownHostsCommand
                    LocalCommand
                    LocalForward
                    LogLevel
                    MACs
                    Match
                    NoHostAuthenticationForLocalhost
                    NumberOfPasswordPrompts
                    PasswordAuthentication
                    PermitLocalCommand
                    PermitRemoteOpen
                    PKCS11Provider
                    Port
                    PreferredAuthentications
                    ProxyCommand
                    ProxyJump
                    ProxyUseFdpass
                    PubkeyAcceptedAlgorithms
                    PubkeyAuthentication
                    RekeyLimit
                    RemoteCommand
                    RemoteForward
                    RequestTTY
                    RequiredRSASize
                    SendEnv
                    ServerAliveInterval
                    ServerAliveCountMax
                    SessionType
                    SetEnv
                    StdinNull
                    StreamLocalBindMask
                    StreamLocalBindUnlink
                    StrictHostKeyChecking
                    TCPKeepAlive
                    Tunnel
                    TunnelDevice
                    UpdateHostKeys
                    User
                    UserKnownHostsFile
                    VerifyHostKeyDNS
                    VisualHostKey
                    XAuthLocation
 
      -P tag  Specify a tag name that may be used to select configuration in
              ssh_config(5).  Refer to the Tag and Match keywords in
              ssh_config(5) for more information.
      -p port
              Port to connect to on the remote host.  This can be specified on
              a per-host basis in the configuration file.
 
      -Q query_option
              Queries for the algorithms supported by one of the following
              features: cipher (supported symmetric ciphers), cipher-auth
              (supported symmetric ciphers that support authenticated
              encryption), help (supported query terms for use with the -Q
              flag), mac (supported message integrity codes), kex (key exchange
              algorithms), key (key types), key-ca-sign (valid CA signature
              algorithms for certificates), key-cert (certificate key types),
              key-plain (non-certificate key types), key-sig (all key types and
              signature algorithms), protocol-version (supported SSH protocol
              versions), and sig (supported signature algorithms).
              Alternatively, any keyword from ssh_config(5) or sshd_config(5)
              that takes an algorithm list may be used as an alias for the
              corresponding query_option.
 
      -q      Quiet mode.  Causes most warning and diagnostic messages to be
              suppressed.
 
      -R [bind_address:]port:host:hostport
      -R [bind_address:]port:local_socket
      -R remote_socket:host:hostport
      -R remote_socket:local_socket
      -R [bind_address:]port
              Specifies that connections to the given TCP port or Unix socket
              on the remote (server) host are to be forwarded to the local
              side.
 
              This works by allocating a socket to listen to either a TCP port
              or to a Unix socket on the remote side.  Whenever a connection is
              made to this port or Unix socket, the connection is forwarded
              over the secure channel, and a connection is made from the local
              machine to either an explicit destination specified by host port
              hostport, or local_socket, or, if no explicit destination was
              specified, ssh will act as a SOCKS 4/5 proxy and forward
              connections to the destinations requested by the remote SOCKS
              client.
 
              Port forwardings can also be specified in the configuration file.
              Privileged ports can be forwarded only when logging in as root on
              the remote machine.  IPv6 addresses can be specified by enclosing
              the address in square brackets.
 
              By default, TCP listening sockets on the server will be bound to
              the loopback interface only.  This may be overridden by
              specifying a bind_address.  An empty bind_address, or the address
              M-bM-^@M-^X*M-bM-^@M-^Y, indicates that the remote socket should listen on all
              interfaces.  Specifying a remote bind_address will only succeed
              if the server's GatewayPorts option is enabled (see
              sshd_config(5)).
 
              If the port argument is M-bM-^@M-^X0M-bM-^@M-^Y, the listen port will be dynamically
              allocated on the server and reported to the client at run time.
              When used together with -O forward, the allocated port will be
              printed to the standard output.
 
      -S ctl_path
              Specifies the location of a control socket for connection
              sharing, or the string M-bM-^@M-^\noneM-bM-^@M-^] to disable connection sharing.
              Refer to the description of ControlPath and ControlMaster in
              ssh_config(5) for details.
 
      -s      May be used to request invocation of a subsystem on the remote
              system.  Subsystems facilitate the use of SSH as a secure
              transport for other applications (e.g. sftp(1)).  The subsystem
              is specified as the remote command.  Refer to the description of
              SessionType in ssh_config(5) for details.
 
      -T      Disable pseudo-terminal allocation.
 
      -t      Force pseudo-terminal allocation.  This can be used to execute
              arbitrary screen-based programs on a remote machine, which can be
              very useful, e.g. when implementing menu services.  Multiple -t
              options force tty allocation, even if ssh has no local tty.
 
      -V      Display the version number and exit.
 
      -v      Verbose mode.  Causes ssh to print debugging messages about its
              progress.  This is helpful in debugging connection,
              authentication, and configuration problems.  Multiple -v options
              increase the verbosity.  The maximum is 3.
 
      -W host:port
              Requests that standard input and output on the client be
              forwarded to host on port over the secure channel.  Implies -N,
              -T, ExitOnForwardFailure and ClearAllForwardings, though these
              can be overridden in the configuration file or using -o command
              line options.
 
      -w local_tun[:remote_tun]
              Requests tunnel device forwarding with the specified tun(4)
              devices between the client (local_tun) and the server
              (remote_tun).
 
              The devices may be specified by numerical ID or the keyword
              M-bM-^@M-^\anyM-bM-^@M-^], which uses the next available tunnel device.  If
              remote_tun is not specified, it defaults to M-bM-^@M-^\anyM-bM-^@M-^].  See also the
              Tunnel and TunnelDevice directives in ssh_config(5).
 
              If the Tunnel directive is unset, it will be set to the default
              tunnel mode, which is M-bM-^@M-^\point-to-pointM-bM-^@M-^].  If a different Tunnel
              forwarding mode it desired, then it should be specified before
              -w.
 
      -X      Enables X11 forwarding.  This can also be specified on a per-host
              basis in a configuration file.
 
              X11 forwarding should be enabled with caution.  Users with the
              ability to bypass file permissions on the remote host (for the
              user's X authorization database) can access the local X11 display
              through the forwarded connection.  An attacker may then be able
              to perform activities such as keystroke monitoring.
 
              For this reason, X11 forwarding is subjected to X11 SECURITY
              extension restrictions by default.  Refer to the ssh -Y option
              and the ForwardX11Trusted directive in ssh_config(5) for more
              information.
 
      -x      Disables X11 forwarding.
 
      -Y      Enables trusted X11 forwarding.  Trusted X11 forwardings are not
              subjected to the X11 SECURITY extension controls.
 
      -y      Send log information using the syslog(3) system module.  By
              default this information is sent to stderr.
 
      ssh may additionally obtain configuration data from a per-user
      configuration file and a system-wide configuration file.  The file format
      and configuration options are described in ssh_config(5).
 
 AUTHENTICATION
      The OpenSSH SSH client supports SSH protocol 2.
 
      The methods available for authentication are: GSSAPI-based
      authentication, host-based authentication, public key authentication,
      keyboard-interactive authentication, and password authentication.
      Authentication methods are tried in the order specified above, though
      PreferredAuthentications can be used to change the default order.
 
      Host-based authentication works as follows: If the machine the user logs
      in from is listed in /etc/hosts.equiv or /etc/shosts.equiv on the remote
      machine, the user is non-root and the user names are the same on both
      sides, or if the files ~/.rhosts or ~/.shosts exist in the user's home
      directory on the remote machine and contain a line containing the name of
      the client machine and the name of the user on that machine, the user is
      considered for login.  Additionally, the server must be able to verify
      the client's host key (see the description of /etc/ssh/ssh_known_hosts
      and ~/.ssh/known_hosts, below) for login to be permitted.  This
      authentication method closes security holes due to IP spoofing, DNS
      spoofing, and routing spoofing.  [Note to the administrator:
      /etc/hosts.equiv, ~/.rhosts, and the rlogin/rsh protocol in general, are
      inherently insecure and should be disabled if security is desired.]
 
      Public key authentication works as follows: The scheme is based on
      public-key cryptography, using cryptosystems where encryption and
      decryption are done using separate keys, and it is unfeasible to derive
      the decryption key from the encryption key.  The idea is that each user
      creates a public/private key pair for authentication purposes.  The
      server knows the public key, and only the user knows the private key.
      ssh implements public key authentication protocol automatically, using
      one of the DSA, ECDSA, Ed25519 or RSA algorithms.  The HISTORY section of
      ssl(8) contains a brief discussion of the DSA and RSA algorithms.
 
      The file ~/.ssh/authorized_keys lists the public keys that are permitted
      for logging in.  When the user logs in, the ssh program tells the server
      which key pair it would like to use for authentication.  The client
      proves that it has access to the private key and the server checks that
      the corresponding public key is authorized to accept the account.
 
      The server may inform the client of errors that prevented public key
      authentication from succeeding after authentication completes using a
      different method.  These may be viewed by increasing the LogLevel to
      DEBUG or higher (e.g. by using the -v flag).
 
      The user creates their key pair by running ssh-keygen(1).  This stores
      the private key in ~/.ssh/id_dsa (DSA), ~/.ssh/id_ecdsa (ECDSA),
      ~/.ssh/id_ecdsa_sk (authenticator-hosted ECDSA), ~/.ssh/id_ed25519
      (Ed25519), ~/.ssh/id_ed25519_sk (authenticator-hosted Ed25519), or
      ~/.ssh/id_rsa (RSA) and stores the public key in ~/.ssh/id_dsa.pub (DSA),
      ~/.ssh/id_ecdsa.pub (ECDSA), ~/.ssh/id_ecdsa_sk.pub (authenticator-hosted
      ECDSA), ~/.ssh/id_ed25519.pub (Ed25519), ~/.ssh/id_ed25519_sk.pub
      (authenticator-hosted Ed25519), or ~/.ssh/id_rsa.pub (RSA) in the user's
      home directory.  The user should then copy the public key to
      ~/.ssh/authorized_keys in their home directory on the remote machine.
      The authorized_keys file corresponds to the conventional ~/.rhosts file,
      and has one key per line, though the lines can be very long.  After this,
      the user can log in without giving the password.
 
      A variation on public key authentication is available in the form of
      certificate authentication: instead of a set of public/private keys,
      signed certificates are used.  This has the advantage that a single
      trusted certification authority can be used in place of many
      public/private keys.  See the CERTIFICATES section of ssh-keygen(1) for
      more information.
 
      The most convenient way to use public key or certificate authentication
      may be with an authentication agent.  See ssh-agent(1) and (optionally)
      the AddKeysToAgent directive in ssh_config(5) for more information.
 
      Keyboard-interactive authentication works as follows: The server sends an
      arbitrary "challenge" text and prompts for a response, possibly multiple
      times.  Examples of keyboard-interactive authentication include BSD
      Authentication (see login.conf(5)) and PAM (some non-OpenBSD systems).
 
      Finally, if other authentication methods fail, ssh prompts the user for a
      password.  The password is sent to the remote host for checking; however,
      since all communications are encrypted, the password cannot be seen by
      someone listening on the network.
 
      ssh automatically maintains and checks a database containing
      identification for all hosts it has ever been used with.  Host keys are
      stored in ~/.ssh/known_hosts in the user's home directory.  Additionally,
      the file /etc/ssh/ssh_known_hosts is automatically checked for known
      hosts.  Any new hosts are automatically added to the user's file.  If a
      host's identification ever changes, ssh warns about this and disables
      password authentication to prevent server spoofing or man-in-the-middle
      attacks, which could otherwise be used to circumvent the encryption.  The
      StrictHostKeyChecking option can be used to control logins to machines
      whose host key is not known or has changed.
 
      When the user's identity has been accepted by the server, the server
      either executes the given command in a non-interactive session or, if no
      command has been specified, logs into the machine and gives the user a
      normal shell as an interactive session.  All communication with the
      remote command or shell will be automatically encrypted.
 
      If an interactive session is requested, ssh by default will only request
      a pseudo-terminal (pty) for interactive sessions when the client has one.
      The flags -T and -t can be used to override this behaviour.
 
      If a pseudo-terminal has been allocated, the user may use the escape
      characters noted below.
 
      If no pseudo-terminal has been allocated, the session is transparent and
      can be used to reliably transfer binary data.  On most systems, setting
      the escape character to M-bM-^@M-^\noneM-bM-^@M-^] will also make the session transparent
      even if a tty is used.
 
      The session terminates when the command or shell on the remote machine
      exits and all X11 and TCP connections have been closed.
 
 ESCAPE CHARACTERS
      When a pseudo-terminal has been requested, ssh supports a number of
      functions through the use of an escape character.
 
      A single tilde character can be sent as ~~ or by following the tilde by a
      character other than those described below.  The escape character must
      always follow a newline to be interpreted as special.  The escape
      character can be changed in configuration files using the EscapeChar
      configuration directive or on the command line by the -e option.
 
      The supported escapes (assuming the default M-bM-^@M-^X~M-bM-^@M-^Y) are:
 
      ~.      Disconnect.
 
      ~^Z     Background ssh.
 
      ~#      List forwarded connections.
 
      ~&      Background ssh at logout when waiting for forwarded connection /
              X11 sessions to terminate.
 
      ~?      Display a list of escape characters.
 
      ~B      Send a BREAK to the remote system (only useful if the peer
              supports it).
 
      ~C      Open command line.  Currently this allows the addition of port
              forwardings using the -L, -R and -D options (see above).  It also
              allows the cancellation of existing port-forwardings with
              -KL[bind_address:]port for local, -KR[bind_address:]port for
              remote and -KD[bind_address:]port for dynamic port-forwardings.
              !command allows the user to execute a local command if the
              PermitLocalCommand option is enabled in ssh_config(5).  Basic
              help is available, using the -h option.
 
      ~R      Request rekeying of the connection (only useful if the peer
              supports it).
 
      ~V      Decrease the verbosity (LogLevel) when errors are being written
              to stderr.
 
      ~v      Increase the verbosity (LogLevel) when errors are being written
              to stderr.
 
 TCP FORWARDING
      Forwarding of arbitrary TCP connections over a secure channel can be
      specified either on the command line or in a configuration file.  One
      possible application of TCP forwarding is a secure connection to a mail
      server; another is going through firewalls.
 
      In the example below, we look at encrypting communication for an IRC
      client, even though the IRC server it connects to does not directly
      support encrypted communication.  This works as follows: the user
      connects to the remote host using ssh, specifying the ports to be used to
      forward the connection.  After that it is possible to start the program
      locally, and ssh will encrypt and forward the connection to the remote
      server.
 
      The following example tunnels an IRC session from the client to an IRC
      server at M-bM-^@M-^\server.example.comM-bM-^@M-^], joining channel M-bM-^@M-^\#usersM-bM-^@M-^], nickname
      M-bM-^@M-^\pinkyM-bM-^@M-^], using the standard IRC port, 6667:
 
          $ ssh -f -L 6667:localhost:6667 server.example.com sleep 10
          $ irc -c '#users' pinky IRC/127.0.0.1
 
      The -f option backgrounds ssh and the remote command M-bM-^@M-^\sleep 10M-bM-^@M-^] is
      specified to allow an amount of time (10 seconds, in the example) to
      start the program which is going to use the tunnel.  If no connections
      are made within the time specified, ssh will exit.
 
 X11 FORWARDING
      If the ForwardX11 variable is set to M-bM-^@M-^\yesM-bM-^@M-^] (or see the description of the
      -X, -x, and -Y options above) and the user is using X11 (the DISPLAY
      environment variable is set), the connection to the X11 display is
      automatically forwarded to the remote side in such a way that any X11
      programs started from the shell (or command) will go through the
      encrypted channel, and the connection to the real X server will be made
      from the local machine.  The user should not manually set DISPLAY.
      Forwarding of X11 connections can be configured on the command line or in
      configuration files.
 
      The DISPLAY value set by ssh will point to the server machine, but with a
      display number greater than zero.  This is normal, and happens because
      ssh creates a M-bM-^@M-^\proxyM-bM-^@M-^] X server on the server machine for forwarding the
      connections over the encrypted channel.
 
      ssh will also automatically set up Xauthority data on the server machine.
      For this purpose, it will generate a random authorization cookie, store
      it in Xauthority on the server, and verify that any forwarded connections
      carry this cookie and replace it by the real cookie when the connection
      is opened.  The real authentication cookie is never sent to the server
      machine (and no cookies are sent in the plain).
 
      If the ForwardAgent variable is set to M-bM-^@M-^\yesM-bM-^@M-^] (or see the description of
      the -A and -a options above) and the user is using an authentication
      agent, the connection to the agent is automatically forwarded to the
      remote side.
 
 VERIFYING HOST KEYS
      When connecting to a server for the first time, a fingerprint of the
      server's public key is presented to the user (unless the option
      StrictHostKeyChecking has been disabled).  Fingerprints can be determined
      using ssh-keygen(1):
 
            $ ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key
 
      If the fingerprint is already known, it can be matched and the key can be
      accepted or rejected.  If only legacy (MD5) fingerprints for the server
      are available, the ssh-keygen(1) -E option may be used to downgrade the
      fingerprint algorithm to match.
 
      Because of the difficulty of comparing host keys just by looking at
      fingerprint strings, there is also support to compare host keys visually,
      using random art.  By setting the VisualHostKey option to M-bM-^@M-^\yesM-bM-^@M-^], a small
      ASCII graphic gets displayed on every login to a server, no matter if the
      session itself is interactive or not.  By learning the pattern a known
      server produces, a user can easily find out that the host key has changed
      when a completely different pattern is displayed.  Because these patterns
      are not unambiguous however, a pattern that looks similar to the pattern
      remembered only gives a good probability that the host key is the same,
      not guaranteed proof.
 
      To get a listing of the fingerprints along with their random art for all
      known hosts, the following command line can be used:
 
            $ ssh-keygen -lv -f ~/.ssh/known_hosts
 
      If the fingerprint is unknown, an alternative method of verification is
      available: SSH fingerprints verified by DNS.  An additional resource
      record (RR), SSHFP, is added to a zonefile and the connecting client is
      able to match the fingerprint with that of the key presented.
 
      In this example, we are connecting a client to a server,
      M-bM-^@M-^\host.example.comM-bM-^@M-^].  The SSHFP resource records should first be added to
      the zonefile for host.example.com:
 
            $ ssh-keygen -r host.example.com.
 
      The output lines will have to be added to the zonefile.  To check that
      the zone is answering fingerprint queries:
 
            $ dig -t SSHFP host.example.com
 
      Finally the client connects:
 
            $ ssh -o "VerifyHostKeyDNS ask" host.example.com
            [...]
            Matching host key fingerprint found in DNS.
            Are you sure you want to continue connecting (yes/no)?
 
      See the VerifyHostKeyDNS option in ssh_config(5) for more information.
 
 SSH-BASED VIRTUAL PRIVATE NETWORKS
      ssh contains support for Virtual Private Network (VPN) tunnelling using
      the tun(4) network pseudo-device, allowing two networks to be joined
      securely.  The sshd_config(5) configuration option PermitTunnel controls
      whether the server supports this, and at what level (layer 2 or 3
      traffic).
 
      The following example would connect client network 10.0.50.0/24 with
      remote network 10.0.99.0/24 using a point-to-point connection from
      10.1.1.1 to 10.1.1.2, provided that the SSH server running on the gateway
      to the remote network, at 192.168.1.15, allows it.
 
      On the client:
 
            # ssh -f -w 0:1 192.168.1.15 true
            # ifconfig tun0 10.1.1.1 10.1.1.2 netmask 255.255.255.252
            # route add 10.0.99.0/24 10.1.1.2
 
      On the server:
 
            # ifconfig tun1 10.1.1.2 10.1.1.1 netmask 255.255.255.252
            # route add 10.0.50.0/24 10.1.1.1
 
      Client access may be more finely tuned via the /root/.ssh/authorized_keys
      file (see below) and the PermitRootLogin server option.  The following
      entry would permit connections on tun(4) device 1 from user M-bM-^@M-^\janeM-bM-^@M-^] and on
      tun device 2 from user M-bM-^@M-^\johnM-bM-^@M-^], if PermitRootLogin is set to
      M-bM-^@M-^\forced-commands-onlyM-bM-^@M-^]:
 
        tunnel="1",command="sh /etc/netstart tun1" ssh-rsa ... jane
        tunnel="2",command="sh /etc/netstart tun2" ssh-rsa ... john
 
      Since an SSH-based setup entails a fair amount of overhead, it may be
      more suited to temporary setups, such as for wireless VPNs.  More
      permanent VPNs are better provided by tools such as ipsecctl(8) and
      isakmpd(8).
 
 ENVIRONMENT
      ssh will normally set the following environment variables:
 
      DISPLAY               The DISPLAY variable indicates the location of the
                            X11 server.  It is automatically set by ssh to
                            point to a value of the form M-bM-^@M-^\hostname:nM-bM-^@M-^], where
                            M-bM-^@M-^\hostnameM-bM-^@M-^] indicates the host where the shell runs,
                            and M-bM-^@M-^XnM-bM-^@M-^Y is an integer M-bM-^IM-% 1.  ssh uses this special
                            value to forward X11 connections over the secure
                            channel.  The user should normally not set DISPLAY
                            explicitly, as that will render the X11 connection
                            insecure (and will require the user to manually
                            copy any required authorization cookies).
 
      HOME                  Set to the path of the user's home directory.
 
      LOGNAME               Synonym for USER; set for compatibility with
                            systems that use this variable.
 
      MAIL                  Set to the path of the user's mailbox.
 
      PATH                  Set to the default PATH, as specified when
                            compiling ssh.
 
      SSH_ASKPASS           If ssh needs a passphrase, it will read the
                            passphrase from the current terminal if it was run
                            from a terminal.  If ssh does not have a terminal
                            associated with it but DISPLAY and SSH_ASKPASS are
                            set, it will execute the program specified by
                            SSH_ASKPASS and open an X11 window to read the
                            passphrase.  This is particularly useful when
                            calling ssh from a .xsession or related script.
                            (Note that on some machines it may be necessary to
                            redirect the input from /dev/null to make this
                            work.)
 
      SSH_ASKPASS_REQUIRE   Allows further control over the use of an askpass
                            program.  If this variable is set to M-bM-^@M-^\neverM-bM-^@M-^] then
                            ssh will never attempt to use one.  If it is set to
                            M-bM-^@M-^\preferM-bM-^@M-^], then ssh will prefer to use the askpass
                            program instead of the TTY when requesting
                            passwords.  Finally, if the variable is set to
                            M-bM-^@M-^\forceM-bM-^@M-^], then the askpass program will be used for
                            all passphrase input regardless of whether DISPLAY
                            is set.
 
      SSH_AUTH_SOCK         Identifies the path of a UNIX-domain socket used to
                            communicate with the agent.
 
      SSH_CONNECTION        Identifies the client and server ends of the
                            connection.  The variable contains four space-
                            separated values: client IP address, client port
                            number, server IP address, and server port number.
 
      SSH_ORIGINAL_COMMAND  This variable contains the original command line if
                            a forced command is executed.  It can be used to
                            extract the original arguments.
 
      SSH_TTY               This is set to the name of the tty (path to the
                            device) associated with the current shell or
                            command.  If the current session has no tty, this
                            variable is not set.
 
      SSH_TUNNEL            Optionally set by sshd(8) to contain the interface
                            names assigned if tunnel forwarding was requested
                            by the client.
 
      SSH_USER_AUTH         Optionally set by sshd(8), this variable may
                            contain a pathname to a file that lists the
                            authentication methods successfully used when the
                            session was established, including any public keys
                            that were used.
 
      TZ                    This variable is set to indicate the present time
                            zone if it was set when the daemon was started
                            (i.e. the daemon passes the value on to new
                            connections).
 
      USER                  Set to the name of the user logging in.
 
      Additionally, ssh reads ~/.ssh/environment, and adds lines of the format
      M-bM-^@M-^\VARNAME=valueM-bM-^@M-^] to the environment if the file exists and users are
      allowed to change their environment.  For more information, see the
      PermitUserEnvironment option in sshd_config(5).
 
 FILES
      ~/.rhosts
              This file is used for host-based authentication (see above).  On
              some machines this file may need to be world-readable if the
              user's home directory is on an NFS partition, because sshd(8)
              reads it as root.  Additionally, this file must be owned by the
              user, and must not have write permissions for anyone else.  The
              recommended permission for most machines is read/write for the
              user, and not accessible by others.
 
      ~/.shosts
              This file is used in exactly the same way as .rhosts, but allows
              host-based authentication without permitting login with
              rlogin/rsh.
 
      ~/.ssh/
              This directory is the default location for all user-specific
              configuration and authentication information.  There is no
              general requirement to keep the entire contents of this directory
              secret, but the recommended permissions are read/write/execute
              for the user, and not accessible by others.
 
      ~/.ssh/authorized_keys
              Lists the public keys (DSA, ECDSA, Ed25519, RSA) that can be used
              for logging in as this user.  The format of this file is
              described in the sshd(8) manual page.  This file is not highly
              sensitive, but the recommended permissions are read/write for the
              user, and not accessible by others.
 
      ~/.ssh/config
              This is the per-user configuration file.  The file format and
              configuration options are described in ssh_config(5).  Because of
              the potential for abuse, this file must have strict permissions:
              read/write for the user, and not writable by others.
 
      ~/.ssh/environment
              Contains additional definitions for environment variables; see
              ENVIRONMENT, above.
 
      ~/.ssh/id_dsa
      ~/.ssh/id_ecdsa
      ~/.ssh/id_ecdsa_sk
      ~/.ssh/id_ed25519
      ~/.ssh/id_ed25519_sk
      ~/.ssh/id_rsa
              Contains the private key for authentication.  These files contain
              sensitive data and should be readable by the user but not
              accessible by others (read/write/execute).  ssh will simply
              ignore a private key file if it is accessible by others.  It is
              possible to specify a passphrase when generating the key which
              will be used to encrypt the sensitive part of this file using
              AES-128.
 
      ~/.ssh/id_dsa.pub
      ~/.ssh/id_ecdsa.pub
      ~/.ssh/id_ecdsa_sk.pub
      ~/.ssh/id_ed25519.pub
      ~/.ssh/id_ed25519_sk.pub
      ~/.ssh/id_rsa.pub
              Contains the public key for authentication.  These files are not
              sensitive and can (but need not) be readable by anyone.
 
      ~/.ssh/known_hosts
              Contains a list of host keys for all hosts the user has logged
              into that are not already in the systemwide list of known host
              keys.  See sshd(8) for further details of the format of this
              file.
 
      ~/.ssh/rc
              Commands in this file are executed by ssh when the user logs in,
              just before the user's shell (or command) is started.  See the
              sshd(8) manual page for more information.
 
      /etc/hosts.equiv
              This file is for host-based authentication (see above).  It
              should only be writable by root.
 
      /etc/shosts.equiv
              This file is used in exactly the same way as hosts.equiv, but
              allows host-based authentication without permitting login with
              rlogin/rsh.
 
      /etc/ssh/ssh_config
              Systemwide configuration file.  The file format and configuration
              options are described in ssh_config(5).
 
      /etc/ssh/ssh_host_key
      /etc/ssh/ssh_host_dsa_key
      /etc/ssh/ssh_host_ecdsa_key
      /etc/ssh/ssh_host_ed25519_key
      /etc/ssh/ssh_host_rsa_key
              These files contain the private parts of the host keys and are
              used for host-based authentication.
 
      /etc/ssh/ssh_known_hosts
              Systemwide list of known host keys.  This file should be prepared
              by the system administrator to contain the public host keys of
              all machines in the organization.  It should be world-readable.
              See sshd(8) for further details of the format of this file.
 
      /etc/ssh/sshrc
              Commands in this file are executed by ssh when the user logs in,
              just before the user's shell (or command) is started.  See the
              sshd(8) manual page for more information.
 
 EXIT STATUS
      ssh exits with the exit status of the remote command or with 255 if an
      error occurred.
 
 SEE ALSO
      scp(1), sftp(1), ssh-add(1), ssh-agent(1), ssh-keygen(1), ssh-keyscan(1),
      tun(4), ssh_config(5), ssh-keysign(8), sshd(8)
 
 STANDARDS
      S. Lehtinen and C. Lonvick, The Secure Shell (SSH) Protocol Assigned
      Numbers, RFC 4250, January 2006.
 
      T. Ylonen and C. Lonvick, The Secure Shell (SSH) Protocol Architecture,
      RFC 4251, January 2006.
 
      T. Ylonen and C. Lonvick, The Secure Shell (SSH) Authentication Protocol,
      RFC 4252, January 2006.
 
      T. Ylonen and C. Lonvick, The Secure Shell (SSH) Transport Layer
      Protocol, RFC 4253, January 2006.
 
      T. Ylonen and C. Lonvick, The Secure Shell (SSH) Connection Protocol, RFC
      4254, January 2006.
 
      J. Schlyter and W. Griffin, Using DNS to Securely Publish Secure Shell
      (SSH) Key Fingerprints, RFC 4255, January 2006.
 
      F. Cusack and M. Forssen, Generic Message Exchange Authentication for the
      Secure Shell Protocol (SSH), RFC 4256, January 2006.
 
      J. Galbraith and P. Remaker, The Secure Shell (SSH) Session Channel Break
      Extension, RFC 4335, January 2006.
 
      M. Bellare, T. Kohno, and C. Namprempre, The Secure Shell (SSH) Transport
      Layer Encryption Modes, RFC 4344, January 2006.
 
      B. Harris, Improved Arcfour Modes for the Secure Shell (SSH) Transport
      Layer Protocol, RFC 4345, January 2006.
 
      M. Friedl, N. Provos, and W. Simpson, Diffie-Hellman Group Exchange for
      the Secure Shell (SSH) Transport Layer Protocol, RFC 4419, March 2006.
 
      J. Galbraith and R. Thayer, The Secure Shell (SSH) Public Key File
      Format, RFC 4716, November 2006.
 
      D. Stebila and J. Green, Elliptic Curve Algorithm Integration in the
      Secure Shell Transport Layer, RFC 5656, December 2009.
 
      A. Perrig and D. Song, Hash Visualization: a New Technique to improve
      Real-World Security, 1999, International Workshop on Cryptographic
      Techniques and E-Commerce (CrypTEC '99).
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.
 
-OpenBSD 7.3                    October 11, 2023                    OpenBSD 7.3
+OpenBSD 7.5                    October 11, 2023                    OpenBSD 7.5
diff --git a/ssh.c b/ssh.c
index 48d93ddf2a9a..0019281f4ad3 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1,2468 +1,2472 @@
-/* $OpenBSD: ssh.c,v 1.599 2023/12/18 14:47:44 djm Exp $ */
+/* $OpenBSD: ssh.c,v 1.600 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Ssh client program.  This program can be used to log into a remote machine.
  * The software supports strong authentication, encryption, and forwarding
  * of X11, TCP/IP, and authentication connections.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * Copyright (c) 1999 Niels Provos.  All rights reserved.
  * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl.  All rights reserved.
  *
  * Modified to work with SSLeay by Niels Provos <provos@citi.umich.edu>
  * in Canada (German citizen).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #include <sys/resource.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #include <pwd.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <unistd.h>
 #include <limits.h>
 #include <locale.h>
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include <openssl/err.h>
 #endif
 #include "openbsd-compat/openssl-compat.h"
 #include "openbsd-compat/sys-queue.h"
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "canohost.h"
 #include "compat.h"
 #include "cipher.h"
 #include "packet.h"
 #include "sshbuf.h"
 #include "channels.h"
 #include "sshkey.h"
 #include "authfd.h"
 #include "authfile.h"
 #include "pathnames.h"
 #include "dispatch.h"
 #include "clientloop.h"
 #include "log.h"
 #include "misc.h"
 #include "readconf.h"
 #include "sshconnect.h"
 #include "kex.h"
 #include "mac.h"
 #include "sshpty.h"
 #include "match.h"
 #include "msg.h"
 #include "version.h"
 #include "ssherr.h"
 #include "myproposal.h"
 #include "utf8.h"
 
 #ifdef ENABLE_PKCS11
 #include "ssh-pkcs11.h"
 #endif
 
 extern char *__progname;
 
 /* Saves a copy of argv for setproctitle emulation */
 #ifndef HAVE_SETPROCTITLE
 static char **saved_av;
 #endif
 
 /* Flag indicating whether debug mode is on.  May be set on the command line. */
 int debug_flag = 0;
 
 /* Flag indicating whether a tty should be requested */
 int tty_flag = 0;
 
 /*
  * Flag indicating that the current process should be backgrounded and
  * a new mux-client launched in the foreground for ControlPersist.
  */
 static int need_controlpersist_detach = 0;
 
 /* Copies of flags for ControlPersist foreground mux-client */
 static int ostdin_null_flag, osession_type, otty_flag, orequest_tty;
 static int ofork_after_authentication;
 
 /*
  * General data structure for command line options and options configurable
  * in configuration files.  See readconf.h.
  */
 Options options;
 
 /* optional user configfile */
 char *config = NULL;
 
 /*
  * Name of the host we are connecting to.  This is the name given on the
  * command line, or the Hostname specified for the user-supplied name in a
  * configuration file.
  */
 char *host;
 
 /*
  * A config can specify a path to forward, overriding SSH_AUTH_SOCK. If this is
  * not NULL, forward the socket at this path instead.
  */
 char *forward_agent_sock_path = NULL;
 
 /* socket address the host resolves to */
 struct sockaddr_storage hostaddr;
 
 /* Private host keys. */
 Sensitive sensitive_data;
 
 /* command to be executed */
 struct sshbuf *command;
 
 /* # of replies received for global requests */
 static int forward_confirms_pending = -1;
 
 /* mux.c */
 extern int muxserver_sock;
 extern u_int muxclient_command;
 
 /* Prints a help message to the user.  This function never returns. */
 
 static void
 usage(void)
 {
 	fprintf(stderr,
 "usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface] [-b bind_address]\n"
 "           [-c cipher_spec] [-D [bind_address:]port] [-E log_file]\n"
 "           [-e escape_char] [-F configfile] [-I pkcs11] [-i identity_file]\n"
 "           [-J destination] [-L address] [-l login_name] [-m mac_spec]\n"
 "           [-O ctl_cmd] [-o option] [-P tag] [-p port] [-R address]\n"
 "           [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]]\n"
 "           destination [command [argument ...]]\n"
 "       ssh [-Q query_option]\n"
 	);
 	exit(255);
 }
 
 static int ssh_session2(struct ssh *, const struct ssh_conn_info *);
 static void load_public_identity_files(const struct ssh_conn_info *);
 static void main_sigchld_handler(int);
 
 /* ~/ expand a list of paths. NB. assumes path[n] is heap-allocated. */
 static void
 tilde_expand_paths(char **paths, u_int num_paths)
 {
 	u_int i;
 	char *cp;
 
 	for (i = 0; i < num_paths; i++) {
 		cp = tilde_expand_filename(paths[i], getuid());
 		free(paths[i]);
 		paths[i] = cp;
 	}
 }
 
 /*
  * Expands the set of percent_expand options used by the majority of keywords
  * in the client that support percent expansion.
  * Caller must free returned string.
  */
 static char *
 default_client_percent_expand(const char *str,
     const struct ssh_conn_info *cinfo)
 {
 	return percent_expand(str,
 	    DEFAULT_CLIENT_PERCENT_EXPAND_ARGS(cinfo),
 	    (char *)NULL);
 }
 
 /*
  * Expands the set of percent_expand options used by the majority of keywords
  * AND perform environment variable substitution.
  * Caller must free returned string.
  */
 static char *
 default_client_percent_dollar_expand(const char *str,
     const struct ssh_conn_info *cinfo)
 {
 	char *ret;
 
 	ret = percent_dollar_expand(str,
 	    DEFAULT_CLIENT_PERCENT_EXPAND_ARGS(cinfo),
 	    (char *)NULL);
 	if (ret == NULL)
 		fatal("invalid environment variable expansion");
 	return ret;
 }
 
 /*
  * Attempt to resolve a host name / port to a set of addresses and
  * optionally return any CNAMEs encountered along the way.
  * Returns NULL on failure.
  * NB. this function must operate with a options having undefined members.
  */
 static struct addrinfo *
 resolve_host(const char *name, int port, int logerr, char *cname, size_t clen)
 {
 	char strport[NI_MAXSERV];
 	const char *errstr = NULL;
 	struct addrinfo hints, *res;
 	int gaierr;
 	LogLevel loglevel = SYSLOG_LEVEL_DEBUG1;
 
 	if (port <= 0)
 		port = default_ssh_port();
 	if (cname != NULL)
 		*cname = '\0';
 	debug3_f("lookup %s:%d", name, port);
 
 	snprintf(strport, sizeof strport, "%d", port);
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = options.address_family == -1 ?
 	    AF_UNSPEC : options.address_family;
 	hints.ai_socktype = SOCK_STREAM;
 	if (cname != NULL)
 		hints.ai_flags = AI_CANONNAME;
 	if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) {
 		if (logerr || (gaierr != EAI_NONAME && gaierr != EAI_NODATA))
 			loglevel = SYSLOG_LEVEL_ERROR;
 		do_log2(loglevel, "%s: Could not resolve hostname %.100s: %s",
 		    __progname, name, ssh_gai_strerror(gaierr));
 		return NULL;
 	}
 	if (cname != NULL && res->ai_canonname != NULL) {
 		if (!valid_domain(res->ai_canonname, 0, &errstr)) {
 			error("ignoring bad CNAME \"%s\" for host \"%s\": %s",
 			    res->ai_canonname, name, errstr);
 		} else if (strlcpy(cname, res->ai_canonname, clen) >= clen) {
 			error_f("host \"%s\" cname \"%s\" too long (max %lu)",
 			    name,  res->ai_canonname, (u_long)clen);
 			if (clen > 0)
 				*cname = '\0';
 		}
 	}
 	return res;
 }
 
 /* Returns non-zero if name can only be an address and not a hostname */
 static int
 is_addr_fast(const char *name)
 {
 	return (strchr(name, '%') != NULL || strchr(name, ':') != NULL ||
 	    strspn(name, "0123456789.") == strlen(name));
 }
 
 /* Returns non-zero if name represents a valid, single address */
 static int
 is_addr(const char *name)
 {
 	char strport[NI_MAXSERV];
 	struct addrinfo hints, *res;
 
 	if (is_addr_fast(name))
 		return 1;
 
 	snprintf(strport, sizeof strport, "%u", default_ssh_port());
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = options.address_family == -1 ?
 	    AF_UNSPEC : options.address_family;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_NUMERICHOST|AI_NUMERICSERV;
 	if (getaddrinfo(name, strport, &hints, &res) != 0)
 		return 0;
 	if (res == NULL || res->ai_next != NULL) {
 		freeaddrinfo(res);
 		return 0;
 	}
 	freeaddrinfo(res);
 	return 1;
 }
 
 /*
  * Attempt to resolve a numeric host address / port to a single address.
  * Returns a canonical address string.
  * Returns NULL on failure.
  * NB. this function must operate with a options having undefined members.
  */
 static struct addrinfo *
 resolve_addr(const char *name, int port, char *caddr, size_t clen)
 {
 	char addr[NI_MAXHOST], strport[NI_MAXSERV];
 	struct addrinfo hints, *res;
 	int gaierr;
 
 	if (port <= 0)
 		port = default_ssh_port();
 	snprintf(strport, sizeof strport, "%u", port);
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = options.address_family == -1 ?
 	    AF_UNSPEC : options.address_family;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_NUMERICHOST|AI_NUMERICSERV;
 	if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) {
 		debug2_f("could not resolve name %.100s as address: %s",
 		    name, ssh_gai_strerror(gaierr));
 		return NULL;
 	}
 	if (res == NULL) {
 		debug_f("getaddrinfo %.100s returned no addresses", name);
 		return NULL;
 	}
 	if (res->ai_next != NULL) {
 		debug_f("getaddrinfo %.100s returned multiple addresses", name);
 		goto fail;
 	}
 	if ((gaierr = getnameinfo(res->ai_addr, res->ai_addrlen,
 	    addr, sizeof(addr), NULL, 0, NI_NUMERICHOST)) != 0) {
 		debug_f("Could not format address for name %.100s: %s",
 		    name, ssh_gai_strerror(gaierr));
 		goto fail;
 	}
 	if (strlcpy(caddr, addr, clen) >= clen) {
 		error_f("host \"%s\" addr \"%s\" too long (max %lu)",
 		    name,  addr, (u_long)clen);
 		if (clen > 0)
 			*caddr = '\0';
  fail:
 		freeaddrinfo(res);
 		return NULL;
 	}
 	return res;
 }
 
 /*
  * Check whether the cname is a permitted replacement for the hostname
  * and perform the replacement if it is.
  * NB. this function must operate with a options having undefined members.
  */
 static int
 check_follow_cname(int direct, char **namep, const char *cname)
 {
 	int i;
 	struct allowed_cname *rule;
 
 	if (*cname == '\0' || !config_has_permitted_cnames(&options) ||
 	    strcmp(*namep, cname) == 0)
 		return 0;
 	if (options.canonicalize_hostname == SSH_CANONICALISE_NO)
 		return 0;
 	/*
 	 * Don't attempt to canonicalize names that will be interpreted by
 	 * a proxy or jump host unless the user specifically requests so.
 	 */
 	if (!direct &&
 	    options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS)
 		return 0;
 	debug3_f("check \"%s\" CNAME \"%s\"", *namep, cname);
 	for (i = 0; i < options.num_permitted_cnames; i++) {
 		rule = options.permitted_cnames + i;
 		if (match_pattern_list(*namep, rule->source_list, 1) != 1 ||
 		    match_pattern_list(cname, rule->target_list, 1) != 1)
 			continue;
 		verbose("Canonicalized DNS aliased hostname "
 		    "\"%s\" => \"%s\"", *namep, cname);
 		free(*namep);
 		*namep = xstrdup(cname);
 		return 1;
 	}
 	return 0;
 }
 
 /*
  * Attempt to resolve the supplied hostname after applying the user's
  * canonicalization rules. Returns the address list for the host or NULL
  * if no name was found after canonicalization.
  * NB. this function must operate with a options having undefined members.
  */
 static struct addrinfo *
 resolve_canonicalize(char **hostp, int port)
 {
 	int i, direct, ndots;
 	char *cp, *fullhost, newname[NI_MAXHOST];
 	struct addrinfo *addrs;
 
 	/*
 	 * Attempt to canonicalise addresses, regardless of
 	 * whether hostname canonicalisation was requested
 	 */
 	if ((addrs = resolve_addr(*hostp, port,
 	    newname, sizeof(newname))) != NULL) {
 		debug2_f("hostname %.100s is address", *hostp);
 		if (strcasecmp(*hostp, newname) != 0) {
 			debug2_f("canonicalised address \"%s\" => \"%s\"",
 			    *hostp, newname);
 			free(*hostp);
 			*hostp = xstrdup(newname);
 		}
 		return addrs;
 	}
 
 	/*
 	 * If this looks like an address but didn't parse as one, it might
 	 * be an address with an invalid interface scope. Skip further
 	 * attempts at canonicalisation.
 	 */
 	if (is_addr_fast(*hostp)) {
 		debug_f("hostname %.100s is an unrecognised address", *hostp);
 		return NULL;
 	}
 
 	if (options.canonicalize_hostname == SSH_CANONICALISE_NO)
 		return NULL;
 
 	/*
 	 * Don't attempt to canonicalize names that will be interpreted by
 	 * a proxy unless the user specifically requests so.
 	 */
 	direct = option_clear_or_none(options.proxy_command) &&
 	    option_clear_or_none(options.jump_host);
 	if (!direct &&
 	    options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS)
 		return NULL;
 
 	/* If domain name is anchored, then resolve it now */
 	if ((*hostp)[strlen(*hostp) - 1] == '.') {
 		debug3_f("name is fully qualified");
 		fullhost = xstrdup(*hostp);
 		if ((addrs = resolve_host(fullhost, port, 0,
 		    newname, sizeof(newname))) != NULL)
 			goto found;
 		free(fullhost);
 		goto notfound;
 	}
 
 	/* Don't apply canonicalization to sufficiently-qualified hostnames */
 	ndots = 0;
 	for (cp = *hostp; *cp != '\0'; cp++) {
 		if (*cp == '.')
 			ndots++;
 	}
 	if (ndots > options.canonicalize_max_dots) {
 		debug3_f("not canonicalizing hostname \"%s\" (max dots %d)",
 		    *hostp, options.canonicalize_max_dots);
 		return NULL;
 	}
 	/* Attempt each supplied suffix */
 	for (i = 0; i < options.num_canonical_domains; i++) {
 		if (strcasecmp(options.canonical_domains[i], "none") == 0)
 			break;
 		xasprintf(&fullhost, "%s.%s.", *hostp,
 		    options.canonical_domains[i]);
 		debug3_f("attempting \"%s\" => \"%s\"", *hostp, fullhost);
 		if ((addrs = resolve_host(fullhost, port, 0,
 		    newname, sizeof(newname))) == NULL) {
 			free(fullhost);
 			continue;
 		}
  found:
 		/* Remove trailing '.' */
 		fullhost[strlen(fullhost) - 1] = '\0';
 		/* Follow CNAME if requested */
 		if (!check_follow_cname(direct, &fullhost, newname)) {
 			debug("Canonicalized hostname \"%s\" => \"%s\"",
 			    *hostp, fullhost);
 		}
 		free(*hostp);
 		*hostp = fullhost;
 		return addrs;
 	}
  notfound:
 	if (!options.canonicalize_fallback_local)
 		fatal("%s: Could not resolve host \"%s\"", __progname, *hostp);
 	debug2_f("host %s not found in any suffix", *hostp);
 	return NULL;
 }
 
 /*
  * Check the result of hostkey loading, ignoring some errors and either
  * discarding the key or fatal()ing for others.
  */
 static void
 check_load(int r, struct sshkey **k, const char *path, const char *message)
 {
 	switch (r) {
 	case 0:
 		/* Check RSA keys size and discard if undersized */
 		if (k != NULL && *k != NULL &&
 		    (r = sshkey_check_rsa_length(*k,
 		    options.required_rsa_size)) != 0) {
 			error_r(r, "load %s \"%s\"", message, path);
 			free(*k);
 			*k = NULL;
 		}
 		break;
 	case SSH_ERR_INTERNAL_ERROR:
 	case SSH_ERR_ALLOC_FAIL:
 		fatal_r(r, "load %s \"%s\"", message, path);
 	case SSH_ERR_SYSTEM_ERROR:
 		/* Ignore missing files */
 		if (errno == ENOENT)
 			break;
 		/* FALLTHROUGH */
 	default:
 		error_r(r, "load %s \"%s\"", message, path);
 		break;
 	}
 }
 
 /*
  * Read per-user configuration file.  Ignore the system wide config
  * file if the user specifies a config file on the command line.
  */
 static void
 process_config_files(const char *host_name, struct passwd *pw, int final_pass,
     int *want_final_pass)
 {
 	char buf[PATH_MAX];
 	int r;
 
 	if (config != NULL) {
 		if (strcasecmp(config, "none") != 0 &&
 		    !read_config_file(config, pw, host, host_name, &options,
 		    SSHCONF_USERCONF | (final_pass ? SSHCONF_FINAL : 0),
 		    want_final_pass))
 			fatal("Can't open user config file %.100s: "
 			    "%.100s", config, strerror(errno));
 	} else {
 		r = snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir,
 		    _PATH_SSH_USER_CONFFILE);
 		if (r > 0 && (size_t)r < sizeof(buf))
 			(void)read_config_file(buf, pw, host, host_name,
 			    &options, SSHCONF_CHECKPERM | SSHCONF_USERCONF |
 			    (final_pass ? SSHCONF_FINAL : 0), want_final_pass);
 
 		/* Read systemwide configuration file after user config. */
 		(void)read_config_file(_PATH_HOST_CONFIG_FILE, pw,
 		    host, host_name, &options,
 		    final_pass ? SSHCONF_FINAL : 0, want_final_pass);
 	}
 }
 
 /* Rewrite the port number in an addrinfo list of addresses */
 static void
 set_addrinfo_port(struct addrinfo *addrs, int port)
 {
 	struct addrinfo *addr;
 
 	for (addr = addrs; addr != NULL; addr = addr->ai_next) {
 		switch (addr->ai_family) {
 		case AF_INET:
 			((struct sockaddr_in *)addr->ai_addr)->
 			    sin_port = htons(port);
 			break;
 		case AF_INET6:
 			((struct sockaddr_in6 *)addr->ai_addr)->
 			    sin6_port = htons(port);
 			break;
 		}
 	}
 }
 
 static void
 ssh_conn_info_free(struct ssh_conn_info *cinfo)
 {
 	if (cinfo == NULL)
 		return;
 	free(cinfo->conn_hash_hex);
 	free(cinfo->shorthost);
 	free(cinfo->uidstr);
 	free(cinfo->keyalias);
 	free(cinfo->thishost);
 	free(cinfo->host_arg);
 	free(cinfo->portstr);
 	free(cinfo->remhost);
 	free(cinfo->remuser);
 	free(cinfo->homedir);
 	free(cinfo->locuser);
 	free(cinfo->jmphost);
 	free(cinfo);
 }
 
 static int
 valid_hostname(const char *s)
 {
 	size_t i;
 
 	if (*s == '-')
 		return 0;
 	for (i = 0; s[i] != 0; i++) {
 		if (strchr("'`\"$\\;&<>|(){}", s[i]) != NULL ||
 		    isspace((u_char)s[i]) || iscntrl((u_char)s[i]))
 			return 0;
 	}
 	return 1;
 }
 
 static int
 valid_ruser(const char *s)
 {
 	size_t i;
 
 	if (*s == '-')
 		return 0;
 	for (i = 0; s[i] != 0; i++) {
 		if (strchr("'`\";&<>|(){}", s[i]) != NULL)
 			return 0;
 		/* Disallow '-' after whitespace */
 		if (isspace((u_char)s[i]) && s[i + 1] == '-')
 			return 0;
 		/* Disallow \ in last position */
 		if (s[i] == '\\' && s[i + 1] == '\0')
 			return 0;
 	}
 	return 1;
 }
 
 /*
  * Main program for the ssh client.
  */
 int
 main(int ac, char **av)
 {
 	struct ssh *ssh = NULL;
 	int i, r, opt, exit_status, use_syslog, direct, timeout_ms;
 	int was_addr, config_test = 0, opt_terminated = 0, want_final_pass = 0;
 	char *p, *cp, *line, *argv0, *logfile;
 	char cname[NI_MAXHOST], thishost[NI_MAXHOST];
 	struct stat st;
 	struct passwd *pw;
 	extern int optind, optreset;
 	extern char *optarg;
 	struct Forward fwd;
 	struct addrinfo *addrs = NULL;
 	size_t n, len;
 	u_int j;
 	struct ssh_conn_info *cinfo = NULL;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	/*
 	 * Discard other fds that are hanging around. These can cause problem
 	 * with backgrounded ssh processes started by ControlPersist.
 	 */
 	closefrom(STDERR_FILENO + 1);
 
 	__progname = ssh_get_progname(av[0]);
 
 #ifndef HAVE_SETPROCTITLE
 	/* Prepare for later setproctitle emulation */
 	/* Save argv so it isn't clobbered by setproctitle() emulation */
 	saved_av = xcalloc(ac + 1, sizeof(*saved_av));
 	for (i = 0; i < ac; i++)
 		saved_av[i] = xstrdup(av[i]);
 	saved_av[i] = NULL;
 	compat_init_setproctitle(ac, av);
 	av = saved_av;
 #endif
 
 	seed_rng();
 
 	/* Get user data. */
 	pw = getpwuid(getuid());
 	if (!pw) {
 		logit("No user exists for uid %lu", (u_long)getuid());
 		exit(255);
 	}
 	/* Take a copy of the returned structure. */
 	pw = pwcopy(pw);
 
 	/*
 	 * Set our umask to something reasonable, as some files are created
 	 * with the default umask.  This will make them world-readable but
 	 * writable only by the owner, which is ok for all files for which we
 	 * don't set the modes explicitly.
 	 */
 	umask(022 | umask(077));
 
 	msetlocale();
 
 	/*
 	 * Initialize option structure to indicate that no values have been
 	 * set.
 	 */
 	initialize_options(&options);
 
 	/*
 	 * Prepare main ssh transport/connection structures
 	 */
 	if ((ssh = ssh_alloc_session_state()) == NULL)
 		fatal("Couldn't allocate session state");
 	channel_init_channels(ssh);
 
 	/* Parse command-line arguments. */
 	host = NULL;
 	use_syslog = 0;
 	logfile = NULL;
 	argv0 = av[0];
 
  again:
 	while ((opt = getopt(ac, av, "1246ab:c:e:fgi:kl:m:no:p:qstvx"
 	    "AB:CD:E:F:GI:J:KL:MNO:P:Q:R:S:TVw:W:XYy")) != -1) { /* HUZdhjruz */
 		switch (opt) {
 		case '1':
 			fatal("SSH protocol v.1 is no longer supported");
 			break;
 		case '2':
 			/* Ignored */
 			break;
 		case '4':
 			options.address_family = AF_INET;
 			break;
 		case '6':
 			options.address_family = AF_INET6;
 			break;
 		case 'n':
 			options.stdin_null = 1;
 			break;
 		case 'f':
 			options.fork_after_authentication = 1;
 			options.stdin_null = 1;
 			break;
 		case 'x':
 			options.forward_x11 = 0;
 			break;
 		case 'X':
 			options.forward_x11 = 1;
 			break;
 		case 'y':
 			use_syslog = 1;
 			break;
 		case 'E':
 			logfile = optarg;
 			break;
 		case 'G':
 			config_test = 1;
 			break;
 		case 'Y':
 			options.forward_x11 = 1;
 			options.forward_x11_trusted = 1;
 			break;
 		case 'g':
 			options.fwd_opts.gateway_ports = 1;
 			break;
 		case 'O':
 			if (options.stdio_forward_host != NULL)
 				fatal("Cannot specify multiplexing "
 				    "command with -W");
 			else if (muxclient_command != 0)
 				fatal("Multiplexing command already specified");
 			if (strcmp(optarg, "check") == 0)
 				muxclient_command = SSHMUX_COMMAND_ALIVE_CHECK;
 			else if (strcmp(optarg, "forward") == 0)
 				muxclient_command = SSHMUX_COMMAND_FORWARD;
 			else if (strcmp(optarg, "exit") == 0)
 				muxclient_command = SSHMUX_COMMAND_TERMINATE;
 			else if (strcmp(optarg, "stop") == 0)
 				muxclient_command = SSHMUX_COMMAND_STOP;
 			else if (strcmp(optarg, "cancel") == 0)
 				muxclient_command = SSHMUX_COMMAND_CANCEL_FWD;
 			else if (strcmp(optarg, "proxy") == 0)
 				muxclient_command = SSHMUX_COMMAND_PROXY;
 			else
 				fatal("Invalid multiplex command.");
 			break;
 		case 'P':
 			if (options.tag == NULL)
 				options.tag = xstrdup(optarg);
 			break;
 		case 'Q':
 			cp = NULL;
 			if (strcmp(optarg, "cipher") == 0 ||
 			    strcasecmp(optarg, "Ciphers") == 0)
 				cp = cipher_alg_list('\n', 0);
 			else if (strcmp(optarg, "cipher-auth") == 0)
 				cp = cipher_alg_list('\n', 1);
 			else if (strcmp(optarg, "mac") == 0 ||
 			    strcasecmp(optarg, "MACs") == 0)
 				cp = mac_alg_list('\n');
 			else if (strcmp(optarg, "kex") == 0 ||
 			    strcasecmp(optarg, "KexAlgorithms") == 0)
 				cp = kex_alg_list('\n');
 			else if (strcmp(optarg, "key") == 0)
 				cp = sshkey_alg_list(0, 0, 0, '\n');
 			else if (strcmp(optarg, "key-cert") == 0)
 				cp = sshkey_alg_list(1, 0, 0, '\n');
 			else if (strcmp(optarg, "key-plain") == 0)
 				cp = sshkey_alg_list(0, 1, 0, '\n');
 			else if (strcmp(optarg, "key-ca-sign") == 0 ||
 			    strcasecmp(optarg, "CASignatureAlgorithms") == 0)
 				cp = sshkey_alg_list(0, 1, 1, '\n');
 			else if (strcmp(optarg, "key-sig") == 0 ||
 			    strcasecmp(optarg, "PubkeyAcceptedKeyTypes") == 0 || /* deprecated name */
 			    strcasecmp(optarg, "PubkeyAcceptedAlgorithms") == 0 ||
 			    strcasecmp(optarg, "HostKeyAlgorithms") == 0 ||
 			    strcasecmp(optarg, "HostbasedKeyTypes") == 0 || /* deprecated name */
 			    strcasecmp(optarg, "HostbasedAcceptedKeyTypes") == 0 || /* deprecated name */
 			    strcasecmp(optarg, "HostbasedAcceptedAlgorithms") == 0)
 				cp = sshkey_alg_list(0, 0, 1, '\n');
 			else if (strcmp(optarg, "sig") == 0)
 				cp = sshkey_alg_list(0, 1, 1, '\n');
 			else if (strcmp(optarg, "protocol-version") == 0)
 				cp = xstrdup("2");
 			else if (strcmp(optarg, "compression") == 0) {
 				cp = xstrdup(compression_alg_list(0));
 				len = strlen(cp);
 				for (n = 0; n < len; n++)
 					if (cp[n] == ',')
 						cp[n] = '\n';
 			} else if (strcmp(optarg, "help") == 0) {
 				cp = xstrdup(
 				    "cipher\ncipher-auth\ncompression\nkex\n"
 				    "key\nkey-cert\nkey-plain\nkey-sig\nmac\n"
 				    "protocol-version\nsig");
 			}
 			if (cp == NULL)
 				fatal("Unsupported query \"%s\"", optarg);
 			printf("%s\n", cp);
 			free(cp);
 			exit(0);
 			break;
 		case 'a':
 			options.forward_agent = 0;
 			break;
 		case 'A':
 			options.forward_agent = 1;
 			break;
 		case 'k':
 			options.gss_deleg_creds = 0;
 			break;
 		case 'K':
 			options.gss_authentication = 1;
 			options.gss_deleg_creds = 1;
 			break;
 		case 'i':
 			p = tilde_expand_filename(optarg, getuid());
 			if (stat(p, &st) == -1)
 				fprintf(stderr, "Warning: Identity file %s "
 				    "not accessible: %s.\n", p,
 				    strerror(errno));
 			else
 				add_identity_file(&options, NULL, p, 1);
 			free(p);
 			break;
 		case 'I':
 #ifdef ENABLE_PKCS11
 			free(options.pkcs11_provider);
 			options.pkcs11_provider = xstrdup(optarg);
 #else
 			fprintf(stderr, "no support for PKCS#11.\n");
 #endif
 			break;
 		case 'J':
 			if (options.jump_host != NULL) {
 				fatal("Only a single -J option is permitted "
 				    "(use commas to separate multiple "
 				    "jump hops)");
 			}
 			if (options.proxy_command != NULL)
 				fatal("Cannot specify -J with ProxyCommand");
 			if (parse_jump(optarg, &options, 1) == -1)
 				fatal("Invalid -J argument");
 			options.proxy_command = xstrdup("none");
 			break;
 		case 't':
 			if (options.request_tty == REQUEST_TTY_YES)
 				options.request_tty = REQUEST_TTY_FORCE;
 			else
 				options.request_tty = REQUEST_TTY_YES;
 			break;
 		case 'v':
 			if (debug_flag == 0) {
 				debug_flag = 1;
 				options.log_level = SYSLOG_LEVEL_DEBUG1;
 			} else {
 				if (options.log_level < SYSLOG_LEVEL_DEBUG3) {
 					debug_flag++;
 					options.log_level++;
 				}
 			}
 			break;
 		case 'V':
 			fprintf(stderr, "%s, %s\n",
 			    SSH_RELEASE, SSH_OPENSSL_VERSION);
 			exit(0);
 			break;
 		case 'w':
 			if (options.tun_open == -1)
 				options.tun_open = SSH_TUNMODE_DEFAULT;
 			options.tun_local = a2tun(optarg, &options.tun_remote);
 			if (options.tun_local == SSH_TUNID_ERR) {
 				fprintf(stderr,
 				    "Bad tun device '%s'\n", optarg);
 				exit(255);
 			}
 			break;
 		case 'W':
 			if (options.stdio_forward_host != NULL)
 				fatal("stdio forward already specified");
 			if (muxclient_command != 0)
 				fatal("Cannot specify stdio forward with -O");
 			if (parse_forward(&fwd, optarg, 1, 0)) {
 				options.stdio_forward_host =
 				    fwd.listen_port == PORT_STREAMLOCAL ?
 				    fwd.listen_path : fwd.listen_host;
 				options.stdio_forward_port = fwd.listen_port;
 				free(fwd.connect_host);
 			} else {
 				fprintf(stderr,
 				    "Bad stdio forwarding specification '%s'\n",
 				    optarg);
 				exit(255);
 			}
 			options.request_tty = REQUEST_TTY_NO;
 			options.session_type = SESSION_TYPE_NONE;
 			break;
 		case 'q':
 			options.log_level = SYSLOG_LEVEL_QUIET;
 			break;
 		case 'e':
 			if (optarg[0] == '^' && optarg[2] == 0 &&
 			    (u_char) optarg[1] >= 64 &&
 			    (u_char) optarg[1] < 128)
 				options.escape_char = (u_char) optarg[1] & 31;
 			else if (strlen(optarg) == 1)
 				options.escape_char = (u_char) optarg[0];
 			else if (strcmp(optarg, "none") == 0)
 				options.escape_char = SSH_ESCAPECHAR_NONE;
 			else {
 				fprintf(stderr, "Bad escape character '%s'.\n",
 				    optarg);
 				exit(255);
 			}
 			break;
 		case 'c':
 			if (!ciphers_valid(*optarg == '+' || *optarg == '^' ?
 			    optarg + 1 : optarg)) {
 				fprintf(stderr, "Unknown cipher type '%s'\n",
 				    optarg);
 				exit(255);
 			}
 			free(options.ciphers);
 			options.ciphers = xstrdup(optarg);
 			break;
 		case 'm':
 			if (mac_valid(optarg)) {
 				free(options.macs);
 				options.macs = xstrdup(optarg);
 			} else {
 				fprintf(stderr, "Unknown mac type '%s'\n",
 				    optarg);
 				exit(255);
 			}
 			break;
 		case 'M':
 			if (options.control_master == SSHCTL_MASTER_YES)
 				options.control_master = SSHCTL_MASTER_ASK;
 			else
 				options.control_master = SSHCTL_MASTER_YES;
 			break;
 		case 'p':
 			if (options.port == -1) {
 				options.port = a2port(optarg);
 				if (options.port <= 0) {
 					fprintf(stderr, "Bad port '%s'\n",
 					    optarg);
 					exit(255);
 				}
 			}
 			break;
 		case 'l':
 			if (options.user == NULL)
 				options.user = optarg;
 			break;
 
 		case 'L':
 			if (parse_forward(&fwd, optarg, 0, 0))
 				add_local_forward(&options, &fwd);
 			else {
 				fprintf(stderr,
 				    "Bad local forwarding specification '%s'\n",
 				    optarg);
 				exit(255);
 			}
 			break;
 
 		case 'R':
 			if (parse_forward(&fwd, optarg, 0, 1) ||
 			    parse_forward(&fwd, optarg, 1, 1)) {
 				add_remote_forward(&options, &fwd);
 			} else {
 				fprintf(stderr,
 				    "Bad remote forwarding specification "
 				    "'%s'\n", optarg);
 				exit(255);
 			}
 			break;
 
 		case 'D':
 			if (parse_forward(&fwd, optarg, 1, 0)) {
 				add_local_forward(&options, &fwd);
 			} else {
 				fprintf(stderr,
 				    "Bad dynamic forwarding specification "
 				    "'%s'\n", optarg);
 				exit(255);
 			}
 			break;
 
 		case 'C':
 #ifdef WITH_ZLIB
 			options.compression = 1;
 #else
 			error("Compression not supported, disabling.");
 #endif
 			break;
 		case 'N':
 			if (options.session_type != -1 &&
 			    options.session_type != SESSION_TYPE_NONE)
 				fatal("Cannot specify -N with -s/SessionType");
 			options.session_type = SESSION_TYPE_NONE;
 			options.request_tty = REQUEST_TTY_NO;
 			break;
 		case 'T':
 			options.request_tty = REQUEST_TTY_NO;
 			break;
 		case 'o':
 			line = xstrdup(optarg);
 			if (process_config_line(&options, pw,
 			    host ? host : "", host ? host : "", line,
 			    "command-line", 0, NULL, SSHCONF_USERCONF) != 0)
 				exit(255);
 			free(line);
 			break;
 		case 's':
 			if (options.session_type != -1 &&
 			    options.session_type != SESSION_TYPE_SUBSYSTEM)
 				fatal("Cannot specify -s with -N/SessionType");
 			options.session_type = SESSION_TYPE_SUBSYSTEM;
 			break;
 		case 'S':
 			free(options.control_path);
 			options.control_path = xstrdup(optarg);
 			break;
 		case 'b':
 			options.bind_address = optarg;
 			break;
 		case 'B':
 			options.bind_interface = optarg;
 			break;
 		case 'F':
 			config = optarg;
 			break;
 		default:
 			usage();
 		}
 	}
 
 	if (optind > 1 && strcmp(av[optind - 1], "--") == 0)
 		opt_terminated = 1;
 
 	ac -= optind;
 	av += optind;
 
 	if (ac > 0 && !host) {
 		int tport;
 		char *tuser;
 		switch (parse_ssh_uri(*av, &tuser, &host, &tport)) {
 		case -1:
 			usage();
 			break;
 		case 0:
 			if (options.user == NULL) {
 				options.user = tuser;
 				tuser = NULL;
 			}
 			free(tuser);
 			if (options.port == -1 && tport != -1)
 				options.port = tport;
 			break;
 		default:
 			p = xstrdup(*av);
 			cp = strrchr(p, '@');
 			if (cp != NULL) {
 				if (cp == p)
 					usage();
 				if (options.user == NULL) {
 					options.user = p;
 					p = NULL;
 				}
 				*cp++ = '\0';
 				host = xstrdup(cp);
 				free(p);
 			} else
 				host = p;
 			break;
 		}
 		if (ac > 1 && !opt_terminated) {
 			optind = optreset = 1;
 			goto again;
 		}
 		ac--, av++;
 	}
 
 	/* Check that we got a host name. */
 	if (!host)
 		usage();
 
 	if (!valid_hostname(host))
 		fatal("hostname contains invalid characters");
 	if (options.user != NULL && !valid_ruser(options.user))
 		fatal("remote username contains invalid characters");
 	options.host_arg = xstrdup(host);
 
 	/* Initialize the command to execute on remote host. */
 	if ((command = sshbuf_new()) == NULL)
 		fatal("sshbuf_new failed");
 
 	/*
 	 * Save the command to execute on the remote host in a buffer. There
 	 * is no limit on the length of the command, except by the maximum
 	 * packet size.  Also sets the tty flag if there is no command.
 	 */
 	if (!ac) {
 		/* No command specified - execute shell on a tty. */
 		if (options.session_type == SESSION_TYPE_SUBSYSTEM) {
 			fprintf(stderr,
 			    "You must specify a subsystem to invoke.\n");
 			usage();
 		}
 	} else {
 		/* A command has been specified.  Store it into the buffer. */
 		for (i = 0; i < ac; i++) {
 			if ((r = sshbuf_putf(command, "%s%s",
 			    i ? " " : "", av[i])) != 0)
 				fatal_fr(r, "buffer error");
 		}
 	}
 
 	ssh_signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */
 
 	/*
 	 * Initialize "log" output.  Since we are the client all output
 	 * goes to stderr unless otherwise specified by -y or -E.
 	 */
 	if (use_syslog && logfile != NULL)
 		fatal("Can't specify both -y and -E");
 	if (logfile != NULL)
 		log_redirect_stderr_to(logfile);
 	log_init(argv0,
 	    options.log_level == SYSLOG_LEVEL_NOT_SET ?
 	    SYSLOG_LEVEL_INFO : options.log_level,
 	    options.log_facility == SYSLOG_FACILITY_NOT_SET ?
 	    SYSLOG_FACILITY_USER : options.log_facility,
 	    !use_syslog);
 
 	if (debug_flag)
 		logit("%s, %s", SSH_RELEASE, SSH_OPENSSL_VERSION);
 
 	/* Parse the configuration files */
 	process_config_files(options.host_arg, pw, 0, &want_final_pass);
 	if (want_final_pass)
 		debug("configuration requests final Match pass");
 
 	/* Hostname canonicalisation needs a few options filled. */
 	fill_default_options_for_canonicalization(&options);
 
 	/* If the user has replaced the hostname then take it into use now */
 	if (options.hostname != NULL) {
 		/* NB. Please keep in sync with readconf.c:match_cfg_line() */
 		cp = percent_expand(options.hostname,
 		    "h", host, (char *)NULL);
 		free(host);
 		host = cp;
 		free(options.hostname);
 		options.hostname = xstrdup(host);
 	}
 
 	/* Don't lowercase addresses, they will be explicitly canonicalised */
 	if ((was_addr = is_addr(host)) == 0)
 		lowercase(host);
 
 	/*
 	 * Try to canonicalize if requested by configuration or the
 	 * hostname is an address.
 	 */
 	if (options.canonicalize_hostname != SSH_CANONICALISE_NO || was_addr)
 		addrs = resolve_canonicalize(&host, options.port);
 
 	/*
 	 * If CanonicalizePermittedCNAMEs have been specified but
 	 * other canonicalization did not happen (by not being requested
 	 * or by failing with fallback) then the hostname may still be changed
 	 * as a result of CNAME following.
 	 *
 	 * Try to resolve the bare hostname name using the system resolver's
 	 * usual search rules and then apply the CNAME follow rules.
 	 *
 	 * Skip the lookup if a ProxyCommand is being used unless the user
 	 * has specifically requested canonicalisation for this case via
 	 * CanonicalizeHostname=always
 	 */
 	direct = option_clear_or_none(options.proxy_command) &&
 	    option_clear_or_none(options.jump_host);
 	if (addrs == NULL && config_has_permitted_cnames(&options) && (direct ||
 	    options.canonicalize_hostname == SSH_CANONICALISE_ALWAYS)) {
 		if ((addrs = resolve_host(host, options.port,
 		    direct, cname, sizeof(cname))) == NULL) {
 			/* Don't fatal proxied host names not in the DNS */
 			if (direct)
 				cleanup_exit(255); /* logged in resolve_host */
 		} else
 			check_follow_cname(direct, &host, cname);
 	}
 
 	/*
 	 * If canonicalisation is enabled then re-parse the configuration
 	 * files as new stanzas may match.
 	 */
 	if (options.canonicalize_hostname != 0 && !want_final_pass) {
 		debug("hostname canonicalisation enabled, "
 		    "will re-parse configuration");
 		want_final_pass = 1;
 	}
 
 	if (want_final_pass) {
 		debug("re-parsing configuration");
 		free(options.hostname);
 		options.hostname = xstrdup(host);
 		process_config_files(options.host_arg, pw, 1, NULL);
 		/*
 		 * Address resolution happens early with canonicalisation
 		 * enabled and the port number may have changed since, so
 		 * reset it in address list
 		 */
 		if (addrs != NULL && options.port > 0)
 			set_addrinfo_port(addrs, options.port);
 	}
 
 	/* Fill configuration defaults. */
 	if (fill_default_options(&options) != 0)
 		cleanup_exit(255);
 
 	if (options.user == NULL)
 		options.user = xstrdup(pw->pw_name);
 
 	/*
 	 * If ProxyJump option specified, then construct a ProxyCommand now.
 	 */
 	if (options.jump_host != NULL) {
 		char port_s[8];
 		const char *jumpuser = options.jump_user, *sshbin = argv0;
 		int port = options.port, jumpport = options.jump_port;
 
 		if (port <= 0)
 			port = default_ssh_port();
 		if (jumpport <= 0)
 			jumpport = default_ssh_port();
 		if (jumpuser == NULL)
 			jumpuser = options.user;
 		if (strcmp(options.jump_host, host) == 0 && port == jumpport &&
 		    strcmp(options.user, jumpuser) == 0)
 			fatal("jumphost loop via %s", options.jump_host);
 
 		/*
 		 * Try to use SSH indicated by argv[0], but fall back to
 		 * "ssh" if it appears unavailable.
 		 */
 		if (strchr(argv0, '/') != NULL && access(argv0, X_OK) != 0)
 			sshbin = "ssh";
 
 		/* Consistency check */
 		if (options.proxy_command != NULL)
 			fatal("inconsistent options: ProxyCommand+ProxyJump");
 		/* Never use FD passing for ProxyJump */
 		options.proxy_use_fdpass = 0;
 		snprintf(port_s, sizeof(port_s), "%d", options.jump_port);
 		xasprintf(&options.proxy_command,
 		    "%s%s%s%s%s%s%s%s%s%s%.*s -W '[%%h]:%%p' %s",
 		    sshbin,
 		    /* Optional "-l user" argument if jump_user set */
 		    options.jump_user == NULL ? "" : " -l ",
 		    options.jump_user == NULL ? "" : options.jump_user,
 		    /* Optional "-p port" argument if jump_port set */
 		    options.jump_port <= 0 ? "" : " -p ",
 		    options.jump_port <= 0 ? "" : port_s,
 		    /* Optional additional jump hosts ",..." */
 		    options.jump_extra == NULL ? "" : " -J ",
 		    options.jump_extra == NULL ? "" : options.jump_extra,
 		    /* Optional "-F" argument if -F specified */
 		    config == NULL ? "" : " -F ",
 		    config == NULL ? "" : config,
 		    /* Optional "-v" arguments if -v set */
 		    debug_flag ? " -" : "",
 		    debug_flag, "vvv",
 		    /* Mandatory hostname */
 		    options.jump_host);
 		debug("Setting implicit ProxyCommand from ProxyJump: %s",
 		    options.proxy_command);
 	}
 
 	if (options.port == 0)
 		options.port = default_ssh_port();
 	channel_set_af(ssh, options.address_family);
 
 	/* Tidy and check options */
 	if (options.host_key_alias != NULL)
 		lowercase(options.host_key_alias);
 	if (options.proxy_command != NULL &&
 	    strcmp(options.proxy_command, "-") == 0 &&
 	    options.proxy_use_fdpass)
 		fatal("ProxyCommand=- and ProxyUseFDPass are incompatible");
 	if (options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK) {
 		if (options.control_persist && options.control_path != NULL) {
 			debug("UpdateHostKeys=ask is incompatible with "
 			    "ControlPersist; disabling");
 			options.update_hostkeys = 0;
 		} else if (sshbuf_len(command) != 0 ||
 		    options.remote_command != NULL ||
 		    options.request_tty == REQUEST_TTY_NO) {
 			debug("UpdateHostKeys=ask is incompatible with "
 			    "remote command execution; disabling");
 			options.update_hostkeys = 0;
 		} else if (options.log_level < SYSLOG_LEVEL_INFO) {
 			/* no point logging anything; user won't see it */
 			options.update_hostkeys = 0;
 		}
 	}
 	if (options.connection_attempts <= 0)
 		fatal("Invalid number of ConnectionAttempts");
 
 	if (sshbuf_len(command) != 0 && options.remote_command != NULL)
 		fatal("Cannot execute command-line and remote command.");
 
 	/* Cannot fork to background if no command. */
 	if (options.fork_after_authentication && sshbuf_len(command) == 0 &&
 	    options.remote_command == NULL &&
 	    options.session_type != SESSION_TYPE_NONE)
 		fatal("Cannot fork into background without a command "
 		    "to execute.");
 
 	/* reinit */
 	log_init(argv0, options.log_level, options.log_facility, !use_syslog);
 	for (j = 0; j < options.num_log_verbose; j++) {
 		if (strcasecmp(options.log_verbose[j], "none") == 0)
 			break;
 		log_verbose_add(options.log_verbose[j]);
 	}
 
 	if (options.request_tty == REQUEST_TTY_YES ||
 	    options.request_tty == REQUEST_TTY_FORCE)
 		tty_flag = 1;
 
 	/* Allocate a tty by default if no command specified. */
 	if (sshbuf_len(command) == 0 && options.remote_command == NULL)
 		tty_flag = options.request_tty != REQUEST_TTY_NO;
 
 	/* Force no tty */
 	if (options.request_tty == REQUEST_TTY_NO ||
 	    (muxclient_command && muxclient_command != SSHMUX_COMMAND_PROXY) ||
 	    options.session_type == SESSION_TYPE_NONE)
 		tty_flag = 0;
 	/* Do not allocate a tty if stdin is not a tty. */
 	if ((!isatty(fileno(stdin)) || options.stdin_null) &&
 	    options.request_tty != REQUEST_TTY_FORCE) {
 		if (tty_flag)
 			logit("Pseudo-terminal will not be allocated because "
 			    "stdin is not a terminal.");
 		tty_flag = 0;
 	}
 
 	/* Set up strings used to percent_expand() arguments */
 	cinfo = xcalloc(1, sizeof(*cinfo));
 	if (gethostname(thishost, sizeof(thishost)) == -1)
 		fatal("gethostname: %s", strerror(errno));
 	cinfo->thishost = xstrdup(thishost);
 	thishost[strcspn(thishost, ".")] = '\0';
 	cinfo->shorthost = xstrdup(thishost);
 	xasprintf(&cinfo->portstr, "%d", options.port);
 	xasprintf(&cinfo->uidstr, "%llu",
 	    (unsigned long long)pw->pw_uid);
 	cinfo->keyalias = xstrdup(options.host_key_alias ?
 	    options.host_key_alias : options.host_arg);
 	cinfo->host_arg = xstrdup(options.host_arg);
 	cinfo->remhost = xstrdup(host);
 	cinfo->remuser = xstrdup(options.user);
 	cinfo->homedir = xstrdup(pw->pw_dir);
 	cinfo->locuser = xstrdup(pw->pw_name);
 	cinfo->jmphost = xstrdup(options.jump_host == NULL ?
 	    "" : options.jump_host);
 	cinfo->conn_hash_hex = ssh_connection_hash(cinfo->thishost,
 	    cinfo->remhost, cinfo->portstr, cinfo->remuser, cinfo->jmphost);
 
 	/*
 	 * Expand tokens in arguments. NB. LocalCommand is expanded later,
 	 * after port-forwarding is set up, so it may pick up any local
 	 * tunnel interface name allocated.
 	 */
 	if (options.remote_command != NULL) {
 		debug3("expanding RemoteCommand: %s", options.remote_command);
 		cp = options.remote_command;
 		options.remote_command = default_client_percent_expand(cp,
 		    cinfo);
 		debug3("expanded RemoteCommand: %s", options.remote_command);
 		free(cp);
 		if ((r = sshbuf_put(command, options.remote_command,
 		    strlen(options.remote_command))) != 0)
 			fatal_fr(r, "buffer error");
 	}
 
 	if (options.control_path != NULL) {
 		cp = tilde_expand_filename(options.control_path, getuid());
 		free(options.control_path);
 		options.control_path = default_client_percent_dollar_expand(cp,
 		    cinfo);
 		free(cp);
 	}
 
 	if (options.identity_agent != NULL) {
 		p = tilde_expand_filename(options.identity_agent, getuid());
 		cp = default_client_percent_dollar_expand(p, cinfo);
 		free(p);
 		free(options.identity_agent);
 		options.identity_agent = cp;
 	}
 
 	if (options.revoked_host_keys != NULL) {
 		p = tilde_expand_filename(options.revoked_host_keys, getuid());
 		cp = default_client_percent_dollar_expand(p, cinfo);
 		free(p);
 		free(options.revoked_host_keys);
 		options.revoked_host_keys = cp;
 	}
 
 	if (options.forward_agent_sock_path != NULL) {
 		p = tilde_expand_filename(options.forward_agent_sock_path,
 		    getuid());
 		cp = default_client_percent_dollar_expand(p, cinfo);
 		free(p);
 		free(options.forward_agent_sock_path);
 		options.forward_agent_sock_path = cp;
 		if (stat(options.forward_agent_sock_path, &st) != 0) {
 			error("Cannot forward agent socket path \"%s\": %s",
 			    options.forward_agent_sock_path, strerror(errno));
 			if (options.exit_on_forward_failure)
 				cleanup_exit(255);
 		}
 	}
 
 	if (options.num_system_hostfiles > 0 &&
 	    strcasecmp(options.system_hostfiles[0], "none") == 0) {
 		if (options.num_system_hostfiles > 1)
 			fatal("Invalid GlobalKnownHostsFiles: \"none\" "
 			    "appears with other entries");
 		free(options.system_hostfiles[0]);
 		options.system_hostfiles[0] = NULL;
 		options.num_system_hostfiles = 0;
 	}
 
 	if (options.num_user_hostfiles > 0 &&
 	    strcasecmp(options.user_hostfiles[0], "none") == 0) {
 		if (options.num_user_hostfiles > 1)
 			fatal("Invalid UserKnownHostsFiles: \"none\" "
 			    "appears with other entries");
 		free(options.user_hostfiles[0]);
 		options.user_hostfiles[0] = NULL;
 		options.num_user_hostfiles = 0;
 	}
 	for (j = 0; j < options.num_user_hostfiles; j++) {
 		if (options.user_hostfiles[j] == NULL)
 			continue;
 		cp = tilde_expand_filename(options.user_hostfiles[j], getuid());
 		p = default_client_percent_dollar_expand(cp, cinfo);
 		if (strcmp(options.user_hostfiles[j], p) != 0)
 			debug3("expanded UserKnownHostsFile '%s' -> "
 			    "'%s'", options.user_hostfiles[j], p);
 		free(options.user_hostfiles[j]);
 		free(cp);
 		options.user_hostfiles[j] = p;
 	}
 
 	for (i = 0; i < options.num_local_forwards; i++) {
 		if (options.local_forwards[i].listen_path != NULL) {
 			cp = options.local_forwards[i].listen_path;
 			p = options.local_forwards[i].listen_path =
 			    default_client_percent_expand(cp, cinfo);
 			if (strcmp(cp, p) != 0)
 				debug3("expanded LocalForward listen path "
 				    "'%s' -> '%s'", cp, p);
 			free(cp);
 		}
 		if (options.local_forwards[i].connect_path != NULL) {
 			cp = options.local_forwards[i].connect_path;
 			p = options.local_forwards[i].connect_path =
 			    default_client_percent_expand(cp, cinfo);
 			if (strcmp(cp, p) != 0)
 				debug3("expanded LocalForward connect path "
 				    "'%s' -> '%s'", cp, p);
 			free(cp);
 		}
 	}
 
 	for (i = 0; i < options.num_remote_forwards; i++) {
 		if (options.remote_forwards[i].listen_path != NULL) {
 			cp = options.remote_forwards[i].listen_path;
 			p = options.remote_forwards[i].listen_path =
 			    default_client_percent_expand(cp, cinfo);
 			if (strcmp(cp, p) != 0)
 				debug3("expanded RemoteForward listen path "
 				    "'%s' -> '%s'", cp, p);
 			free(cp);
 		}
 		if (options.remote_forwards[i].connect_path != NULL) {
 			cp = options.remote_forwards[i].connect_path;
 			p = options.remote_forwards[i].connect_path =
 			    default_client_percent_expand(cp, cinfo);
 			if (strcmp(cp, p) != 0)
 				debug3("expanded RemoteForward connect path "
 				    "'%s' -> '%s'", cp, p);
 			free(cp);
 		}
 	}
 
 	if (config_test) {
 		dump_client_config(&options, host);
 		exit(0);
 	}
 
 	/* Expand SecurityKeyProvider if it refers to an environment variable */
 	if (options.sk_provider != NULL && *options.sk_provider == '$' &&
 	    strlen(options.sk_provider) > 1) {
 		if ((cp = getenv(options.sk_provider + 1)) == NULL) {
 			debug("Authenticator provider %s did not resolve; "
 			    "disabling", options.sk_provider);
 			free(options.sk_provider);
 			options.sk_provider = NULL;
 		} else {
 			debug2("resolved SecurityKeyProvider %s => %s",
 			    options.sk_provider, cp);
 			free(options.sk_provider);
 			options.sk_provider = xstrdup(cp);
 		}
 	}
 
 	if (muxclient_command != 0 && options.control_path == NULL)
 		fatal("No ControlPath specified for \"-O\" command");
 	if (options.control_path != NULL) {
 		int sock;
 		if ((sock = muxclient(options.control_path)) >= 0) {
 			ssh_packet_set_connection(ssh, sock, sock);
 			ssh_packet_set_mux(ssh);
 			goto skip_connect;
 		}
 	}
 
 	/*
 	 * If hostname canonicalisation was not enabled, then we may not
 	 * have yet resolved the hostname. Do so now.
 	 */
 	if (addrs == NULL && options.proxy_command == NULL) {
 		debug2("resolving \"%s\" port %d", host, options.port);
 		if ((addrs = resolve_host(host, options.port, 1,
 		    cname, sizeof(cname))) == NULL)
 			cleanup_exit(255); /* resolve_host logs the error */
 	}
 
 	if (options.connection_timeout >= INT_MAX/1000)
 		timeout_ms = INT_MAX;
 	else
 		timeout_ms = options.connection_timeout * 1000;
 
 	/* Apply channels timeouts, if set */
 	channel_clear_timeouts(ssh);
 	for (j = 0; j < options.num_channel_timeouts; j++) {
 		debug3("applying channel timeout %s",
 		    options.channel_timeouts[j]);
 		if (parse_pattern_interval(options.channel_timeouts[j],
 		    &cp, &i) != 0) {
 			fatal_f("internal error: bad timeout %s",
 			    options.channel_timeouts[j]);
 		}
 		channel_add_timeout(ssh, cp, i);
 		free(cp);
 	}
 
 	/* Open a connection to the remote host. */
 	if (ssh_connect(ssh, host, options.host_arg, addrs, &hostaddr,
 	    options.port, options.connection_attempts,
 	    &timeout_ms, options.tcp_keep_alive) != 0)
 		exit(255);
 
 	if (addrs != NULL)
 		freeaddrinfo(addrs);
 
 	ssh_packet_set_timeout(ssh, options.server_alive_interval,
 	    options.server_alive_count_max);
 
 	if (timeout_ms > 0)
 		debug3("timeout: %d ms remain after connect", timeout_ms);
 
 	/*
 	 * If we successfully made the connection and we have hostbased auth
 	 * enabled, load the public keys so we can later use the ssh-keysign
 	 * helper to sign challenges.
 	 */
 	sensitive_data.nkeys = 0;
 	sensitive_data.keys = NULL;
 	if (options.hostbased_authentication) {
 		int loaded = 0;
 
 		sensitive_data.nkeys = 10;
 		sensitive_data.keys = xcalloc(sensitive_data.nkeys,
 		    sizeof(*sensitive_data.keys));
 
 		/* XXX check errors? */
 #define L_PUBKEY(p,o) do { \
 	if ((o) >= sensitive_data.nkeys) \
 		fatal_f("pubkey out of array bounds"); \
 	check_load(sshkey_load_public(p, &(sensitive_data.keys[o]), NULL), \
 	    &(sensitive_data.keys[o]), p, "pubkey"); \
 	if (sensitive_data.keys[o] != NULL) { \
 		debug2("hostbased key %d: %s key from \"%s\"", o, \
 		    sshkey_ssh_name(sensitive_data.keys[o]), p); \
 		loaded++; \
 	} \
 } while (0)
 #define L_CERT(p,o) do { \
 	if ((o) >= sensitive_data.nkeys) \
 		fatal_f("cert out of array bounds"); \
 	check_load(sshkey_load_cert(p, &(sensitive_data.keys[o])), \
 	    &(sensitive_data.keys[o]), p, "cert"); \
 	if (sensitive_data.keys[o] != NULL) { \
 		debug2("hostbased key %d: %s cert from \"%s\"", o, \
 		    sshkey_ssh_name(sensitive_data.keys[o]), p); \
 		loaded++; \
 	} \
 } while (0)
 
 		if (options.hostbased_authentication == 1) {
 			L_CERT(_PATH_HOST_ECDSA_KEY_FILE, 0);
 			L_CERT(_PATH_HOST_ED25519_KEY_FILE, 1);
 			L_CERT(_PATH_HOST_RSA_KEY_FILE, 2);
+#ifdef WITH_DSA
 			L_CERT(_PATH_HOST_DSA_KEY_FILE, 3);
+#endif
 			L_PUBKEY(_PATH_HOST_ECDSA_KEY_FILE, 4);
 			L_PUBKEY(_PATH_HOST_ED25519_KEY_FILE, 5);
 			L_PUBKEY(_PATH_HOST_RSA_KEY_FILE, 6);
+#ifdef WITH_DSA
 			L_PUBKEY(_PATH_HOST_DSA_KEY_FILE, 7);
+#endif
 			L_CERT(_PATH_HOST_XMSS_KEY_FILE, 8);
 			L_PUBKEY(_PATH_HOST_XMSS_KEY_FILE, 9);
 			if (loaded == 0)
 				debug("HostbasedAuthentication enabled but no "
 				   "local public host keys could be loaded.");
 		}
 	}
 
 	/* load options.identity_files */
 	load_public_identity_files(cinfo);
 
 	/* optionally set the SSH_AUTHSOCKET_ENV_NAME variable */
 	if (options.identity_agent &&
 	    strcmp(options.identity_agent, SSH_AUTHSOCKET_ENV_NAME) != 0) {
 		if (strcmp(options.identity_agent, "none") == 0) {
 			unsetenv(SSH_AUTHSOCKET_ENV_NAME);
 		} else {
 			cp = options.identity_agent;
 			/* legacy (limited) format */
 			if (cp[0] == '$' && cp[1] != '{') {
 				if (!valid_env_name(cp + 1)) {
 					fatal("Invalid IdentityAgent "
 					    "environment variable name %s", cp);
 				}
 				if ((p = getenv(cp + 1)) == NULL)
 					unsetenv(SSH_AUTHSOCKET_ENV_NAME);
 				else
 					setenv(SSH_AUTHSOCKET_ENV_NAME, p, 1);
 			} else {
 				/* identity_agent specifies a path directly */
 				setenv(SSH_AUTHSOCKET_ENV_NAME, cp, 1);
 			}
 		}
 	}
 
 	if (options.forward_agent && options.forward_agent_sock_path != NULL) {
 		cp = options.forward_agent_sock_path;
 		if (cp[0] == '$') {
 			if (!valid_env_name(cp + 1)) {
 				fatal("Invalid ForwardAgent environment variable name %s", cp);
 			}
 			if ((p = getenv(cp + 1)) != NULL)
 				forward_agent_sock_path = xstrdup(p);
 			else
 				options.forward_agent = 0;
 			free(cp);
 		} else {
 			forward_agent_sock_path = cp;
 		}
 	}
 
 	/* Expand ~ in known host file names. */
 	tilde_expand_paths(options.system_hostfiles,
 	    options.num_system_hostfiles);
 	tilde_expand_paths(options.user_hostfiles, options.num_user_hostfiles);
 
 	ssh_signal(SIGCHLD, main_sigchld_handler);
 
 	/* Log into the remote system.  Never returns if the login fails. */
 	ssh_login(ssh, &sensitive_data, host, (struct sockaddr *)&hostaddr,
 	    options.port, pw, timeout_ms, cinfo);
 
 	/* We no longer need the private host keys.  Clear them now. */
 	if (sensitive_data.nkeys != 0) {
 		for (i = 0; i < sensitive_data.nkeys; i++) {
 			if (sensitive_data.keys[i] != NULL) {
 				/* Destroys contents safely */
 				debug3("clear hostkey %d", i);
 				sshkey_free(sensitive_data.keys[i]);
 				sensitive_data.keys[i] = NULL;
 			}
 		}
 		free(sensitive_data.keys);
 	}
 	for (i = 0; i < options.num_identity_files; i++) {
 		free(options.identity_files[i]);
 		options.identity_files[i] = NULL;
 		if (options.identity_keys[i]) {
 			sshkey_free(options.identity_keys[i]);
 			options.identity_keys[i] = NULL;
 		}
 	}
 	for (i = 0; i < options.num_certificate_files; i++) {
 		free(options.certificate_files[i]);
 		options.certificate_files[i] = NULL;
 	}
 
 #ifdef ENABLE_PKCS11
 	(void)pkcs11_del_provider(options.pkcs11_provider);
 #endif
 
  skip_connect:
 	exit_status = ssh_session2(ssh, cinfo);
 	ssh_conn_info_free(cinfo);
 	ssh_packet_close(ssh);
 
 	if (options.control_path != NULL && muxserver_sock != -1)
 		unlink(options.control_path);
 
 	/* Kill ProxyCommand if it is running. */
 	ssh_kill_proxy_command();
 
 	return exit_status;
 }
 
 static void
 control_persist_detach(void)
 {
 	pid_t pid;
 
 	debug_f("backgrounding master process");
 
 	/*
 	 * master (current process) into the background, and make the
 	 * foreground process a client of the backgrounded master.
 	 */
 	switch ((pid = fork())) {
 	case -1:
 		fatal_f("fork: %s", strerror(errno));
 	case 0:
 		/* Child: master process continues mainloop */
 		break;
 	default:
 		/*
 		 * Parent: set up mux client to connect to backgrounded
 		 * master.
 		 */
 		debug2_f("background process is %ld", (long)pid);
 		options.stdin_null = ostdin_null_flag;
 		options.request_tty = orequest_tty;
 		tty_flag = otty_flag;
 		options.fork_after_authentication = ofork_after_authentication;
 		options.session_type = osession_type;
 		close(muxserver_sock);
 		muxserver_sock = -1;
 		options.control_master = SSHCTL_MASTER_NO;
 		(void)muxclient(options.control_path);
 		/* muxclient() doesn't return on success. */
 		fatal("Failed to connect to new control master");
 	}
 	if (stdfd_devnull(1, 1, !(log_is_on_stderr() && debug_flag)) == -1)
 		error_f("stdfd_devnull failed");
 	daemon(1, 1);
 	setproctitle("%s [mux]", options.control_path);
 }
 
 /* Do fork() after authentication. Used by "ssh -f" */
 static void
 fork_postauth(void)
 {
 	if (need_controlpersist_detach)
 		control_persist_detach();
 	debug("forking to background");
 	options.fork_after_authentication = 0;
 	if (daemon(1, 1) == -1)
 		fatal("daemon() failed: %.200s", strerror(errno));
 	if (stdfd_devnull(1, 1, !(log_is_on_stderr() && debug_flag)) == -1)
 		error_f("stdfd_devnull failed");
 }
 
 static void
 forwarding_success(void)
 {
 	if (forward_confirms_pending == -1)
 		return;
 	if (--forward_confirms_pending == 0) {
 		debug_f("all expected forwarding replies received");
 		if (options.fork_after_authentication)
 			fork_postauth();
 	} else {
 		debug2_f("%d expected forwarding replies remaining",
 		    forward_confirms_pending);
 	}
 }
 
 /* Callback for remote forward global requests */
 static void
 ssh_confirm_remote_forward(struct ssh *ssh, int type, u_int32_t seq, void *ctxt)
 {
 	struct Forward *rfwd = (struct Forward *)ctxt;
 	u_int port;
 	int r;
 
 	/* XXX verbose() on failure? */
 	debug("remote forward %s for: listen %s%s%d, connect %s:%d",
 	    type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
 	    rfwd->listen_path ? rfwd->listen_path :
 	    rfwd->listen_host ? rfwd->listen_host : "",
 	    (rfwd->listen_path || rfwd->listen_host) ? ":" : "",
 	    rfwd->listen_port, rfwd->connect_path ? rfwd->connect_path :
 	    rfwd->connect_host, rfwd->connect_port);
 	if (rfwd->listen_path == NULL && rfwd->listen_port == 0) {
 		if (type == SSH2_MSG_REQUEST_SUCCESS) {
 			if ((r = sshpkt_get_u32(ssh, &port)) != 0)
 				fatal_fr(r, "parse packet");
 			if (port > 65535) {
 				error("Invalid allocated port %u for remote "
 				    "forward to %s:%d", port,
 				    rfwd->connect_host, rfwd->connect_port);
 				/* Ensure failure processing runs below */
 				type = SSH2_MSG_REQUEST_FAILURE;
 				channel_update_permission(ssh,
 				    rfwd->handle, -1);
 			} else {
 				rfwd->allocated_port = (int)port;
 				logit("Allocated port %u for remote "
 				    "forward to %s:%d",
 				    rfwd->allocated_port, rfwd->connect_path ?
 				    rfwd->connect_path : rfwd->connect_host,
 				    rfwd->connect_port);
 				channel_update_permission(ssh,
 				    rfwd->handle, rfwd->allocated_port);
 			}
 		} else {
 			channel_update_permission(ssh, rfwd->handle, -1);
 		}
 	}
 
 	if (type == SSH2_MSG_REQUEST_FAILURE) {
 		if (options.exit_on_forward_failure) {
 			if (rfwd->listen_path != NULL)
 				fatal("Error: remote port forwarding failed "
 				    "for listen path %s", rfwd->listen_path);
 			else
 				fatal("Error: remote port forwarding failed "
 				    "for listen port %d", rfwd->listen_port);
 		} else {
 			if (rfwd->listen_path != NULL)
 				logit("Warning: remote port forwarding failed "
 				    "for listen path %s", rfwd->listen_path);
 			else
 				logit("Warning: remote port forwarding failed "
 				    "for listen port %d", rfwd->listen_port);
 		}
 	}
 	forwarding_success();
 }
 
 static void
 client_cleanup_stdio_fwd(struct ssh *ssh, int id, int force, void *arg)
 {
 	debug("stdio forwarding: done");
 	cleanup_exit(0);
 }
 
 static void
 ssh_stdio_confirm(struct ssh *ssh, int id, int success, void *arg)
 {
 	if (!success)
 		fatal("stdio forwarding failed");
 }
 
 static void
 ssh_tun_confirm(struct ssh *ssh, int id, int success, void *arg)
 {
 	if (!success) {
 		error("Tunnel forwarding failed");
 		if (options.exit_on_forward_failure)
 			cleanup_exit(255);
 	}
 
 	debug_f("tunnel forward established, id=%d", id);
 	forwarding_success();
 }
 
 static void
 ssh_init_stdio_forwarding(struct ssh *ssh)
 {
 	Channel *c;
 	int in, out;
 
 	if (options.stdio_forward_host == NULL)
 		return;
 
 	debug3_f("%s:%d", options.stdio_forward_host,
 	    options.stdio_forward_port);
 
 	if ((in = dup(STDIN_FILENO)) == -1 ||
 	    (out = dup(STDOUT_FILENO)) == -1)
 		fatal_f("dup() in/out failed");
 	if ((c = channel_connect_stdio_fwd(ssh, options.stdio_forward_host,
 	    options.stdio_forward_port, in, out,
 	    CHANNEL_NONBLOCK_STDIO)) == NULL)
 		fatal_f("channel_connect_stdio_fwd failed");
 	channel_register_cleanup(ssh, c->self, client_cleanup_stdio_fwd, 0);
 	channel_register_open_confirm(ssh, c->self, ssh_stdio_confirm, NULL);
 }
 
 static void
 ssh_init_forward_permissions(struct ssh *ssh, const char *what, char **opens,
     u_int num_opens)
 {
 	u_int i;
 	int port;
 	char *addr, *arg, *oarg;
 	int where = FORWARD_LOCAL;
 
 	channel_clear_permission(ssh, FORWARD_ADM, where);
 	if (num_opens == 0)
 		return; /* permit any */
 
 	/* handle keywords: "any" / "none" */
 	if (num_opens == 1 && strcmp(opens[0], "any") == 0)
 		return;
 	if (num_opens == 1 && strcmp(opens[0], "none") == 0) {
 		channel_disable_admin(ssh, where);
 		return;
 	}
 	/* Otherwise treat it as a list of permitted host:port */
 	for (i = 0; i < num_opens; i++) {
 		oarg = arg = xstrdup(opens[i]);
 		addr = hpdelim(&arg);
 		if (addr == NULL)
 			fatal_f("missing host in %s", what);
 		addr = cleanhostname(addr);
 		if (arg == NULL || ((port = permitopen_port(arg)) < 0))
 			fatal_f("bad port number in %s", what);
 		/* Send it to channels layer */
 		channel_add_permission(ssh, FORWARD_ADM,
 		    where, addr, port);
 		free(oarg);
 	}
 }
 
 static void
 ssh_init_forwarding(struct ssh *ssh, char **ifname)
 {
 	int success = 0;
 	int i;
 
 	ssh_init_forward_permissions(ssh, "permitremoteopen",
 	    options.permitted_remote_opens,
 	    options.num_permitted_remote_opens);
 
 	if (options.exit_on_forward_failure)
 		forward_confirms_pending = 0; /* track pending requests */
 	/* Initiate local TCP/IP port forwardings. */
 	for (i = 0; i < options.num_local_forwards; i++) {
 		debug("Local connections to %.200s:%d forwarded to remote "
 		    "address %.200s:%d",
 		    (options.local_forwards[i].listen_path != NULL) ?
 		    options.local_forwards[i].listen_path :
 		    (options.local_forwards[i].listen_host == NULL) ?
 		    (options.fwd_opts.gateway_ports ? "*" : "LOCALHOST") :
 		    options.local_forwards[i].listen_host,
 		    options.local_forwards[i].listen_port,
 		    (options.local_forwards[i].connect_path != NULL) ?
 		    options.local_forwards[i].connect_path :
 		    options.local_forwards[i].connect_host,
 		    options.local_forwards[i].connect_port);
 		success += channel_setup_local_fwd_listener(ssh,
 		    &options.local_forwards[i], &options.fwd_opts);
 	}
 	if (i > 0 && success != i && options.exit_on_forward_failure)
 		fatal("Could not request local forwarding.");
 	if (i > 0 && success == 0)
 		error("Could not request local forwarding.");
 
 	/* Initiate remote TCP/IP port forwardings. */
 	for (i = 0; i < options.num_remote_forwards; i++) {
 		debug("Remote connections from %.200s:%d forwarded to "
 		    "local address %.200s:%d",
 		    (options.remote_forwards[i].listen_path != NULL) ?
 		    options.remote_forwards[i].listen_path :
 		    (options.remote_forwards[i].listen_host == NULL) ?
 		    "LOCALHOST" : options.remote_forwards[i].listen_host,
 		    options.remote_forwards[i].listen_port,
 		    (options.remote_forwards[i].connect_path != NULL) ?
 		    options.remote_forwards[i].connect_path :
 		    options.remote_forwards[i].connect_host,
 		    options.remote_forwards[i].connect_port);
 		if ((options.remote_forwards[i].handle =
 		    channel_request_remote_forwarding(ssh,
 		    &options.remote_forwards[i])) >= 0) {
 			client_register_global_confirm(
 			    ssh_confirm_remote_forward,
 			    &options.remote_forwards[i]);
 			forward_confirms_pending++;
 		} else if (options.exit_on_forward_failure)
 			fatal("Could not request remote forwarding.");
 		else
 			logit("Warning: Could not request remote forwarding.");
 	}
 
 	/* Initiate tunnel forwarding. */
 	if (options.tun_open != SSH_TUNMODE_NO) {
 		if ((*ifname = client_request_tun_fwd(ssh,
 		    options.tun_open, options.tun_local,
 		    options.tun_remote, ssh_tun_confirm, NULL)) != NULL)
 			forward_confirms_pending++;
 		else if (options.exit_on_forward_failure)
 			fatal("Could not request tunnel forwarding.");
 		else
 			error("Could not request tunnel forwarding.");
 	}
 	if (forward_confirms_pending > 0) {
 		debug_f("expecting replies for %d forwards",
 		    forward_confirms_pending);
 	}
 }
 
 static void
 check_agent_present(void)
 {
 	int r;
 
 	if (options.forward_agent) {
 		/* Clear agent forwarding if we don't have an agent. */
 		if ((r = ssh_get_authentication_socket(NULL)) != 0) {
 			options.forward_agent = 0;
 			if (r != SSH_ERR_AGENT_NOT_PRESENT)
 				debug_r(r, "ssh_get_authentication_socket");
 		}
 	}
 }
 
 static void
 ssh_session2_setup(struct ssh *ssh, int id, int success, void *arg)
 {
 	extern char **environ;
 	const char *display, *term;
 	int r, interactive = tty_flag;
 	char *proto = NULL, *data = NULL;
 
 	if (!success)
 		return; /* No need for error message, channels code sends one */
 
 	display = getenv("DISPLAY");
 	if (display == NULL && options.forward_x11)
 		debug("X11 forwarding requested but DISPLAY not set");
 	if (options.forward_x11 && client_x11_get_proto(ssh, display,
 	    options.xauth_location, options.forward_x11_trusted,
 	    options.forward_x11_timeout, &proto, &data) == 0) {
 		/* Request forwarding with authentication spoofing. */
 		debug("Requesting X11 forwarding with authentication "
 		    "spoofing.");
 		x11_request_forwarding_with_spoofing(ssh, id, display, proto,
 		    data, 1);
 		client_expect_confirm(ssh, id, "X11 forwarding", CONFIRM_WARN);
 		/* XXX exit_on_forward_failure */
 		interactive = 1;
 	}
 
 	check_agent_present();
 	if (options.forward_agent) {
 		debug("Requesting authentication agent forwarding.");
 		channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0);
 		if ((r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send packet");
 	}
 
 	/* Tell the packet module whether this is an interactive session. */
 	ssh_packet_set_interactive(ssh, interactive,
 	    options.ip_qos_interactive, options.ip_qos_bulk);
 
 	if ((term = lookup_env_in_list("TERM", options.setenv,
 	    options.num_setenv)) == NULL || *term == '\0')
 		term = getenv("TERM");
 	client_session2_setup(ssh, id, tty_flag,
 	    options.session_type == SESSION_TYPE_SUBSYSTEM, term,
 	    NULL, fileno(stdin), command, environ);
 }
 
 /* open new channel for a session */
 static int
 ssh_session2_open(struct ssh *ssh)
 {
 	Channel *c;
 	int window, packetmax, in, out, err;
 
 	if (options.stdin_null) {
 		in = open(_PATH_DEVNULL, O_RDONLY);
 	} else {
 		in = dup(STDIN_FILENO);
 	}
 	out = dup(STDOUT_FILENO);
 	err = dup(STDERR_FILENO);
 
 	if (in == -1 || out == -1 || err == -1)
 		fatal("dup() in/out/err failed");
 
 	window = CHAN_SES_WINDOW_DEFAULT;
 	packetmax = CHAN_SES_PACKET_DEFAULT;
 	if (tty_flag) {
 		window >>= 1;
 		packetmax >>= 1;
 	}
 	c = channel_new(ssh,
 	    "session", SSH_CHANNEL_OPENING, in, out, err,
 	    window, packetmax, CHAN_EXTENDED_WRITE,
 	    "client-session", CHANNEL_NONBLOCK_STDIO);
 
 	debug3_f("channel_new: %d", c->self);
 
 	channel_send_open(ssh, c->self);
 	if (options.session_type != SESSION_TYPE_NONE)
 		channel_register_open_confirm(ssh, c->self,
 		    ssh_session2_setup, NULL);
 
 	return c->self;
 }
 
 static int
 ssh_session2(struct ssh *ssh, const struct ssh_conn_info *cinfo)
 {
 	int r, interactive, id = -1;
 	char *cp, *tun_fwd_ifname = NULL;
 
 	/* XXX should be pre-session */
 	if (!options.control_persist)
 		ssh_init_stdio_forwarding(ssh);
 
 	ssh_init_forwarding(ssh, &tun_fwd_ifname);
 
 	if (options.local_command != NULL) {
 		debug3("expanding LocalCommand: %s", options.local_command);
 		cp = options.local_command;
 		options.local_command = percent_expand(cp,
 		    DEFAULT_CLIENT_PERCENT_EXPAND_ARGS(cinfo),
 		    "T", tun_fwd_ifname == NULL ? "NONE" : tun_fwd_ifname,
 		    (char *)NULL);
 		debug3("expanded LocalCommand: %s", options.local_command);
 		free(cp);
 	}
 
 	/* Start listening for multiplex clients */
 	if (!ssh_packet_get_mux(ssh))
 		muxserver_listen(ssh);
 
 	/*
 	 * If we are in control persist mode and have a working mux listen
 	 * socket, then prepare to background ourselves and have a foreground
 	 * client attach as a control client.
 	 * NB. we must save copies of the flags that we override for
 	 * the backgrounding, since we defer attachment of the client until
 	 * after the connection is fully established (in particular,
 	 * async rfwd replies have been received for ExitOnForwardFailure).
 	 */
 	if (options.control_persist && muxserver_sock != -1) {
 		ostdin_null_flag = options.stdin_null;
 		osession_type = options.session_type;
 		orequest_tty = options.request_tty;
 		otty_flag = tty_flag;
 		ofork_after_authentication = options.fork_after_authentication;
 		options.stdin_null = 1;
 		options.session_type = SESSION_TYPE_NONE;
 		tty_flag = 0;
 		if ((osession_type != SESSION_TYPE_NONE ||
 		    options.stdio_forward_host != NULL))
 			need_controlpersist_detach = 1;
 		options.fork_after_authentication = 1;
 	}
 	/*
 	 * ControlPersist mux listen socket setup failed, attempt the
 	 * stdio forward setup that we skipped earlier.
 	 */
 	if (options.control_persist && muxserver_sock == -1)
 		ssh_init_stdio_forwarding(ssh);
 
 	if (options.session_type != SESSION_TYPE_NONE)
 		id = ssh_session2_open(ssh);
 	else {
 		interactive = options.control_master == SSHCTL_MASTER_NO;
 		/* ControlPersist may have clobbered ControlMaster, so check */
 		if (need_controlpersist_detach)
 			interactive = otty_flag != 0;
 		ssh_packet_set_interactive(ssh, interactive,
 		    options.ip_qos_interactive, options.ip_qos_bulk);
 	}
 
 	/* If we don't expect to open a new session, then disallow it */
 	if (options.control_master == SSHCTL_MASTER_NO &&
 	    (ssh->compat & SSH_NEW_OPENSSH)) {
 		debug("Requesting no-more-sessions@openssh.com");
 		if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 		    (r = sshpkt_put_cstring(ssh,
 		    "no-more-sessions@openssh.com")) != 0 ||
 		    (r = sshpkt_put_u8(ssh, 0)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send packet");
 	}
 
 	/* Execute a local command */
 	if (options.local_command != NULL &&
 	    options.permit_local_command)
 		ssh_local_cmd(options.local_command);
 
 	/*
 	 * stdout is now owned by the session channel; clobber it here
 	 * so future channel closes are propagated to the local fd.
 	 * NB. this can only happen after LocalCommand has completed,
 	 * as it may want to write to stdout.
 	 */
 	if (!need_controlpersist_detach && stdfd_devnull(0, 1, 0) == -1)
 		error_f("stdfd_devnull failed");
 
 	/*
 	 * If requested and we are not interested in replies to remote
 	 * forwarding requests, then let ssh continue in the background.
 	 */
 	if (options.fork_after_authentication) {
 		if (options.exit_on_forward_failure &&
 		    options.num_remote_forwards > 0) {
 			debug("deferring postauth fork until remote forward "
 			    "confirmation received");
 		} else
 			fork_postauth();
 	}
 
 	return client_loop(ssh, tty_flag, tty_flag ?
 	    options.escape_char : SSH_ESCAPECHAR_NONE, id);
 }
 
 /* Loads all IdentityFile and CertificateFile keys */
 static void
 load_public_identity_files(const struct ssh_conn_info *cinfo)
 {
 	char *filename, *cp;
 	struct sshkey *public;
 	int i;
 	u_int n_ids, n_certs;
 	char *identity_files[SSH_MAX_IDENTITY_FILES];
 	struct sshkey *identity_keys[SSH_MAX_IDENTITY_FILES];
 	int identity_file_userprovided[SSH_MAX_IDENTITY_FILES];
 	char *certificate_files[SSH_MAX_CERTIFICATE_FILES];
 	struct sshkey *certificates[SSH_MAX_CERTIFICATE_FILES];
 	int certificate_file_userprovided[SSH_MAX_CERTIFICATE_FILES];
 #ifdef ENABLE_PKCS11
 	struct sshkey **keys = NULL;
 	char **comments = NULL;
 	int nkeys;
 #endif /* PKCS11 */
 
 	n_ids = n_certs = 0;
 	memset(identity_files, 0, sizeof(identity_files));
 	memset(identity_keys, 0, sizeof(identity_keys));
 	memset(identity_file_userprovided, 0,
 	    sizeof(identity_file_userprovided));
 	memset(certificate_files, 0, sizeof(certificate_files));
 	memset(certificates, 0, sizeof(certificates));
 	memset(certificate_file_userprovided, 0,
 	    sizeof(certificate_file_userprovided));
 
 #ifdef ENABLE_PKCS11
 	if (options.pkcs11_provider != NULL &&
 	    options.num_identity_files < SSH_MAX_IDENTITY_FILES &&
 	    (pkcs11_init(!options.batch_mode) == 0) &&
 	    (nkeys = pkcs11_add_provider(options.pkcs11_provider, NULL,
 	    &keys, &comments)) > 0) {
 		for (i = 0; i < nkeys; i++) {
 			if (n_ids >= SSH_MAX_IDENTITY_FILES) {
 				sshkey_free(keys[i]);
 				free(comments[i]);
 				continue;
 			}
 			identity_keys[n_ids] = keys[i];
 			identity_files[n_ids] = comments[i]; /* transferred */
 			n_ids++;
 		}
 		free(keys);
 		free(comments);
 	}
 #endif /* ENABLE_PKCS11 */
 	for (i = 0; i < options.num_identity_files; i++) {
 		if (n_ids >= SSH_MAX_IDENTITY_FILES ||
 		    strcasecmp(options.identity_files[i], "none") == 0) {
 			free(options.identity_files[i]);
 			options.identity_files[i] = NULL;
 			continue;
 		}
 		cp = tilde_expand_filename(options.identity_files[i], getuid());
 		filename = default_client_percent_dollar_expand(cp, cinfo);
 		free(cp);
 		check_load(sshkey_load_public(filename, &public, NULL),
 		    &public, filename, "pubkey");
 		debug("identity file %s type %d", filename,
 		    public ? public->type : -1);
 		free(options.identity_files[i]);
 		identity_files[n_ids] = filename;
 		identity_keys[n_ids] = public;
 		identity_file_userprovided[n_ids] =
 		    options.identity_file_userprovided[i];
 		if (++n_ids >= SSH_MAX_IDENTITY_FILES)
 			continue;
 
 		/*
 		 * If no certificates have been explicitly listed then try
 		 * to add the default certificate variant too.
 		 */
 		if (options.num_certificate_files != 0)
 			continue;
 		xasprintf(&cp, "%s-cert", filename);
 		check_load(sshkey_load_public(cp, &public, NULL),
 		    &public, filename, "pubkey");
 		debug("identity file %s type %d", cp,
 		    public ? public->type : -1);
 		if (public == NULL) {
 			free(cp);
 			continue;
 		}
 		if (!sshkey_is_cert(public)) {
 			debug_f("key %s type %s is not a certificate",
 			    cp, sshkey_type(public));
 			sshkey_free(public);
 			free(cp);
 			continue;
 		}
 		/* NB. leave filename pointing to private key */
 		identity_files[n_ids] = xstrdup(filename);
 		identity_keys[n_ids] = public;
 		identity_file_userprovided[n_ids] =
 		    options.identity_file_userprovided[i];
 		n_ids++;
 	}
 
 	if (options.num_certificate_files > SSH_MAX_CERTIFICATE_FILES)
 		fatal_f("too many certificates");
 	for (i = 0; i < options.num_certificate_files; i++) {
 		cp = tilde_expand_filename(options.certificate_files[i],
 		    getuid());
 		filename = default_client_percent_dollar_expand(cp, cinfo);
 		free(cp);
 
 		check_load(sshkey_load_public(filename, &public, NULL),
 		    &public, filename, "certificate");
 		debug("certificate file %s type %d", filename,
 		    public ? public->type : -1);
 		free(options.certificate_files[i]);
 		options.certificate_files[i] = NULL;
 		if (public == NULL) {
 			free(filename);
 			continue;
 		}
 		if (!sshkey_is_cert(public)) {
 			debug_f("key %s type %s is not a certificate",
 			    filename, sshkey_type(public));
 			sshkey_free(public);
 			free(filename);
 			continue;
 		}
 		certificate_files[n_certs] = filename;
 		certificates[n_certs] = public;
 		certificate_file_userprovided[n_certs] =
 		    options.certificate_file_userprovided[i];
 		++n_certs;
 	}
 
 	options.num_identity_files = n_ids;
 	memcpy(options.identity_files, identity_files, sizeof(identity_files));
 	memcpy(options.identity_keys, identity_keys, sizeof(identity_keys));
 	memcpy(options.identity_file_userprovided,
 	    identity_file_userprovided, sizeof(identity_file_userprovided));
 
 	options.num_certificate_files = n_certs;
 	memcpy(options.certificate_files,
 	    certificate_files, sizeof(certificate_files));
 	memcpy(options.certificates, certificates, sizeof(certificates));
 	memcpy(options.certificate_file_userprovided,
 	    certificate_file_userprovided,
 	    sizeof(certificate_file_userprovided));
 }
 
 static void
 main_sigchld_handler(int sig)
 {
 	int save_errno = errno;
 	pid_t pid;
 	int status;
 
 	while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
 	    (pid == -1 && errno == EINTR))
 		;
 	errno = save_errno;
 }
diff --git a/ssh_api.c b/ssh_api.c
index d3c6617616bd..fadf2f4b10d9 100644
--- a/ssh_api.c
+++ b/ssh_api.c
@@ -1,570 +1,580 @@
-/* $OpenBSD: ssh_api.c,v 1.27 2021/04/03 06:18:41 djm Exp $ */
+/* $OpenBSD: ssh_api.c,v 1.28 2024/01/09 21:39:14 djm Exp $ */
 /*
  * Copyright (c) 2012 Markus Friedl.  All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "ssh_api.h"
 #include "compat.h"
 #include "log.h"
 #include "authfile.h"
 #include "sshkey.h"
 #include "misc.h"
 #include "ssh2.h"
 #include "version.h"
 #include "myproposal.h"
 #include "ssherr.h"
 #include "sshbuf.h"
 
 #include "openbsd-compat/openssl-compat.h"
 
 #include <string.h>
 
 int	_ssh_exchange_banner(struct ssh *);
 int	_ssh_send_banner(struct ssh *, struct sshbuf *);
 int	_ssh_read_banner(struct ssh *, struct sshbuf *);
 int	_ssh_order_hostkeyalgs(struct ssh *);
 int	_ssh_verify_host_key(struct sshkey *, struct ssh *);
 struct sshkey *_ssh_host_public_key(int, int, struct ssh *);
 struct sshkey *_ssh_host_private_key(int, int, struct ssh *);
 int	_ssh_host_key_sign(struct ssh *, struct sshkey *, struct sshkey *,
     u_char **, size_t *, const u_char *, size_t, const char *);
 
 /*
  * stubs for the server side implementation of kex.
  * disable privsep so our stubs will never be called.
  */
 int	use_privsep = 0;
 int	mm_sshkey_sign(struct sshkey *, u_char **, u_int *,
     const u_char *, u_int, const char *, const char *, const char *, u_int);
 
 #ifdef WITH_OPENSSL
 DH	*mm_choose_dh(int, int, int);
 #endif
 
 int
 mm_sshkey_sign(struct sshkey *key, u_char **sigp, u_int *lenp,
     const u_char *data, u_int datalen, const char *alg,
     const char *sk_provider, const char *sk_pin, u_int compat)
 {
 	return (-1);
 }
 
 #ifdef WITH_OPENSSL
 DH *
 mm_choose_dh(int min, int nbits, int max)
 {
 	return (NULL);
 }
 #endif
 
 /* API */
 
 int
 ssh_init(struct ssh **sshp, int is_server, struct kex_params *kex_params)
 {
 	char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
+	char *populated[PROPOSAL_MAX];
 	struct ssh *ssh;
 	char **proposal;
 	static int called;
 	int r;
 
 	if (!called) {
 		seed_rng();
 		called = 1;
 	}
 
 	if ((ssh = ssh_packet_set_connection(NULL, -1, -1)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if (is_server)
 		ssh_packet_set_server(ssh);
 
 	/* Initialize key exchange */
 	proposal = kex_params ? kex_params->proposal : myproposal;
-	if ((r = kex_ready(ssh, proposal)) != 0) {
+	kex_proposal_populate_entries(ssh, populated,
+	    proposal[PROPOSAL_KEX_ALGS],
+	    proposal[PROPOSAL_ENC_ALGS_CTOS],
+	    proposal[PROPOSAL_MAC_ALGS_CTOS],
+	    proposal[PROPOSAL_COMP_ALGS_CTOS],
+	    proposal[PROPOSAL_SERVER_HOST_KEY_ALGS]);
+	r = kex_ready(ssh, populated);
+	kex_proposal_free_entries(populated);
+	if (r != 0) {
 		ssh_free(ssh);
 		return r;
 	}
+
 	ssh->kex->server = is_server;
 	if (is_server) {
 #ifdef WITH_OPENSSL
 		ssh->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server;
 		ssh->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server;
 		ssh->kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_server;
 		ssh->kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_server;
 		ssh->kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_server;
 		ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
 		ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
 # ifdef OPENSSL_HAS_ECC
 		ssh->kex->kex[KEX_ECDH_SHA2] = kex_gen_server;
 # endif
 #endif /* WITH_OPENSSL */
 		ssh->kex->kex[KEX_C25519_SHA256] = kex_gen_server;
 		ssh->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server;
 		ssh->kex->load_host_public_key=&_ssh_host_public_key;
 		ssh->kex->load_host_private_key=&_ssh_host_private_key;
 		ssh->kex->sign=&_ssh_host_key_sign;
 	} else {
 #ifdef WITH_OPENSSL
 		ssh->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_client;
 		ssh->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_client;
 		ssh->kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_client;
 		ssh->kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_client;
 		ssh->kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_client;
 		ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
 		ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
 # ifdef OPENSSL_HAS_ECC
 		ssh->kex->kex[KEX_ECDH_SHA2] = kex_gen_client;
 # endif
 #endif /* WITH_OPENSSL */
 		ssh->kex->kex[KEX_C25519_SHA256] = kex_gen_client;
 		ssh->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_client;
 		ssh->kex->verify_host_key =&_ssh_verify_host_key;
 	}
 	*sshp = ssh;
 	return 0;
 }
 
 void
 ssh_free(struct ssh *ssh)
 {
 	struct key_entry *k;
 
 	if (ssh == NULL)
 		return;
 
 	/*
 	 * we've only created the public keys variants in case we
 	 * are a acting as a server.
 	 */
 	while ((k = TAILQ_FIRST(&ssh->public_keys)) != NULL) {
 		TAILQ_REMOVE(&ssh->public_keys, k, next);
 		if (ssh->kex && ssh->kex->server)
 			sshkey_free(k->key);
 		free(k);
 	}
 	while ((k = TAILQ_FIRST(&ssh->private_keys)) != NULL) {
 		TAILQ_REMOVE(&ssh->private_keys, k, next);
 		free(k);
 	}
 	ssh_packet_close(ssh);
 	free(ssh);
 }
 
 void
 ssh_set_app_data(struct ssh *ssh, void *app_data)
 {
 	ssh->app_data = app_data;
 }
 
 void *
 ssh_get_app_data(struct ssh *ssh)
 {
 	return ssh->app_data;
 }
 
 /* Returns < 0 on error, 0 otherwise */
 int
 ssh_add_hostkey(struct ssh *ssh, struct sshkey *key)
 {
 	struct sshkey *pubkey = NULL;
 	struct key_entry *k = NULL, *k_prv = NULL;
 	int r;
 
 	if (ssh->kex->server) {
 		if ((r = sshkey_from_private(key, &pubkey)) != 0)
 			return r;
 		if ((k = malloc(sizeof(*k))) == NULL ||
 		    (k_prv = malloc(sizeof(*k_prv))) == NULL) {
 			free(k);
 			sshkey_free(pubkey);
 			return SSH_ERR_ALLOC_FAIL;
 		}
 		k_prv->key = key;
 		TAILQ_INSERT_TAIL(&ssh->private_keys, k_prv, next);
 
 		/* add the public key, too */
 		k->key = pubkey;
 		TAILQ_INSERT_TAIL(&ssh->public_keys, k, next);
 		r = 0;
 	} else {
 		if ((k = malloc(sizeof(*k))) == NULL)
 			return SSH_ERR_ALLOC_FAIL;
 		k->key = key;
 		TAILQ_INSERT_TAIL(&ssh->public_keys, k, next);
 		r = 0;
 	}
 
 	return r;
 }
 
 int
 ssh_set_verify_host_key_callback(struct ssh *ssh,
     int (*cb)(struct sshkey *, struct ssh *))
 {
 	if (cb == NULL || ssh->kex == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	ssh->kex->verify_host_key = cb;
 
 	return 0;
 }
 
 int
 ssh_input_append(struct ssh *ssh, const u_char *data, size_t len)
 {
 	return sshbuf_put(ssh_packet_get_input(ssh), data, len);
 }
 
 int
 ssh_packet_next(struct ssh *ssh, u_char *typep)
 {
 	int r;
 	u_int32_t seqnr;
 	u_char type;
 
 	/*
 	 * Try to read a packet. Return SSH_MSG_NONE if no packet or not
 	 * enough data.
 	 */
 	*typep = SSH_MSG_NONE;
 	if (sshbuf_len(ssh->kex->client_version) == 0 ||
 	    sshbuf_len(ssh->kex->server_version) == 0)
 		return _ssh_exchange_banner(ssh);
 	/*
 	 * If we enough data and a dispatch function then
 	 * call the function and get the next packet.
 	 * Otherwise return the packet type to the caller so it
 	 * can decide how to go on.
 	 *
 	 * We will only call the dispatch function for:
 	 *     20-29    Algorithm negotiation
 	 *     30-49    Key exchange method specific (numbers can be reused for
 	 *              different authentication methods)
 	 */
 	for (;;) {
 		if ((r = ssh_packet_read_poll2(ssh, &type, &seqnr)) != 0)
 			return r;
 		if (type > 0 && type < DISPATCH_MAX &&
 		    type >= SSH2_MSG_KEXINIT && type <= SSH2_MSG_TRANSPORT_MAX &&
 		    ssh->dispatch[type] != NULL) {
 			if ((r = (*ssh->dispatch[type])(type, seqnr, ssh)) != 0)
 				return r;
 		} else {
 			*typep = type;
 			return 0;
 		}
 	}
 }
 
 const u_char *
 ssh_packet_payload(struct ssh *ssh, size_t *lenp)
 {
 	return sshpkt_ptr(ssh, lenp);
 }
 
 int
 ssh_packet_put(struct ssh *ssh, int type, const u_char *data, size_t len)
 {
 	int r;
 
 	if ((r = sshpkt_start(ssh, type)) != 0 ||
 	    (r = sshpkt_put(ssh, data, len)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		return r;
 	return 0;
 }
 
 const u_char *
 ssh_output_ptr(struct ssh *ssh, size_t *len)
 {
 	struct sshbuf *output = ssh_packet_get_output(ssh);
 
 	*len = sshbuf_len(output);
 	return sshbuf_ptr(output);
 }
 
 int
 ssh_output_consume(struct ssh *ssh, size_t len)
 {
 	return sshbuf_consume(ssh_packet_get_output(ssh), len);
 }
 
 int
 ssh_output_space(struct ssh *ssh, size_t len)
 {
 	return (0 == sshbuf_check_reserve(ssh_packet_get_output(ssh), len));
 }
 
 int
 ssh_input_space(struct ssh *ssh, size_t len)
 {
 	return (0 == sshbuf_check_reserve(ssh_packet_get_input(ssh), len));
 }
 
 /* Read other side's version identification. */
 int
 _ssh_read_banner(struct ssh *ssh, struct sshbuf *banner)
 {
 	struct sshbuf *input = ssh_packet_get_input(ssh);
 	const char *mismatch = "Protocol mismatch.\r\n";
 	const u_char *s = sshbuf_ptr(input);
 	u_char c;
 	char *cp = NULL, *remote_version = NULL;
 	int r = 0, remote_major, remote_minor, expect_nl;
 	size_t n, j;
 
 	for (j = n = 0;;) {
 		sshbuf_reset(banner);
 		expect_nl = 0;
 		for (;;) {
 			if (j >= sshbuf_len(input))
 				return 0; /* insufficient data in input buf */
 			c = s[j++];
 			if (c == '\r') {
 				expect_nl = 1;
 				continue;
 			}
 			if (c == '\n')
 				break;
 			if (expect_nl)
 				goto bad;
 			if ((r = sshbuf_put_u8(banner, c)) != 0)
 				return r;
 			if (sshbuf_len(banner) > SSH_MAX_BANNER_LEN)
 				goto bad;
 		}
 		if (sshbuf_len(banner) >= 4 &&
 		    memcmp(sshbuf_ptr(banner), "SSH-", 4) == 0)
 			break;
 		debug_f("%.*s", (int)sshbuf_len(banner),
 		    sshbuf_ptr(banner));
 		/* Accept lines before banner only on client */
 		if (ssh->kex->server || ++n > SSH_MAX_PRE_BANNER_LINES) {
   bad:
 			if ((r = sshbuf_put(ssh_packet_get_output(ssh),
 			    mismatch, strlen(mismatch))) != 0)
 				return r;
 			return SSH_ERR_NO_PROTOCOL_VERSION;
 		}
 	}
 	if ((r = sshbuf_consume(input, j)) != 0)
 		return r;
 
 	/* XXX remote version must be the same size as banner for sscanf */
 	if ((cp = sshbuf_dup_string(banner)) == NULL ||
 	    (remote_version = calloc(1, sshbuf_len(banner))) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/*
 	 * Check that the versions match.  In future this might accept
 	 * several versions and set appropriate flags to handle them.
 	 */
 	if (sscanf(cp, "SSH-%d.%d-%[^\n]\n",
 	    &remote_major, &remote_minor, remote_version) != 3) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	debug("Remote protocol version %d.%d, remote software version %.100s",
 	    remote_major, remote_minor, remote_version);
 
 	compat_banner(ssh, remote_version);
 	if  (remote_major == 1 && remote_minor == 99) {
 		remote_major = 2;
 		remote_minor = 0;
 	}
 	if (remote_major != 2)
 		r = SSH_ERR_PROTOCOL_MISMATCH;
 
 	debug("Remote version string %.100s", cp);
  out:
 	free(cp);
 	free(remote_version);
 	return r;
 }
 
 /* Send our own protocol version identification. */
 int
 _ssh_send_banner(struct ssh *ssh, struct sshbuf *banner)
 {
 	char *cp;
 	int r;
 
 	if ((r = sshbuf_putf(banner, "SSH-2.0-%.100s\r\n", SSH_VERSION)) != 0)
 		return r;
 	if ((r = sshbuf_putb(ssh_packet_get_output(ssh), banner)) != 0)
 		return r;
 	/* Remove trailing \r\n */
 	if ((r = sshbuf_consume_end(banner, 2)) != 0)
 		return r;
 	if ((cp = sshbuf_dup_string(banner)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	debug("Local version string %.100s", cp);
 	free(cp);
 	return 0;
 }
 
 int
 _ssh_exchange_banner(struct ssh *ssh)
 {
 	struct kex *kex = ssh->kex;
 	int r;
 
 	/*
 	 * if _ssh_read_banner() cannot parse a full version string
 	 * it will return NULL and we end up calling it again.
 	 */
 
 	r = 0;
 	if (kex->server) {
 		if (sshbuf_len(ssh->kex->server_version) == 0)
 			r = _ssh_send_banner(ssh, ssh->kex->server_version);
 		if (r == 0 &&
 		    sshbuf_len(ssh->kex->server_version) != 0 &&
 		    sshbuf_len(ssh->kex->client_version) == 0)
 			r = _ssh_read_banner(ssh, ssh->kex->client_version);
 	} else {
 		if (sshbuf_len(ssh->kex->server_version) == 0)
 			r = _ssh_read_banner(ssh, ssh->kex->server_version);
 		if (r == 0 &&
 		    sshbuf_len(ssh->kex->server_version) != 0 &&
 		    sshbuf_len(ssh->kex->client_version) == 0)
 			r = _ssh_send_banner(ssh, ssh->kex->client_version);
 	}
 	if (r != 0)
 		return r;
 	/* start initial kex as soon as we have exchanged the banners */
 	if (sshbuf_len(ssh->kex->server_version) != 0 &&
 	    sshbuf_len(ssh->kex->client_version) != 0) {
 		if ((r = _ssh_order_hostkeyalgs(ssh)) != 0 ||
 		    (r = kex_send_kexinit(ssh)) != 0)
 			return r;
 	}
 	return 0;
 }
 
 struct sshkey *
 _ssh_host_public_key(int type, int nid, struct ssh *ssh)
 {
 	struct key_entry *k;
 
 	debug3_f("need %d", type);
 	TAILQ_FOREACH(k, &ssh->public_keys, next) {
 		debug3_f("check %s", sshkey_type(k->key));
 		if (k->key->type == type &&
 		    (type != KEY_ECDSA || k->key->ecdsa_nid == nid))
 			return (k->key);
 	}
 	return (NULL);
 }
 
 struct sshkey *
 _ssh_host_private_key(int type, int nid, struct ssh *ssh)
 {
 	struct key_entry *k;
 
 	debug3_f("need %d", type);
 	TAILQ_FOREACH(k, &ssh->private_keys, next) {
 		debug3_f("check %s", sshkey_type(k->key));
 		if (k->key->type == type &&
 		    (type != KEY_ECDSA || k->key->ecdsa_nid == nid))
 			return (k->key);
 	}
 	return (NULL);
 }
 
 int
 _ssh_verify_host_key(struct sshkey *hostkey, struct ssh *ssh)
 {
 	struct key_entry *k;
 
 	debug3_f("need %s", sshkey_type(hostkey));
 	TAILQ_FOREACH(k, &ssh->public_keys, next) {
 		debug3_f("check %s", sshkey_type(k->key));
 		if (sshkey_equal_public(hostkey, k->key))
 			return (0);	/* ok */
 	}
 	return (-1);	/* failed */
 }
 
 /* offer hostkey algorithms in kexinit depending on registered keys */
 int
 _ssh_order_hostkeyalgs(struct ssh *ssh)
 {
 	struct key_entry *k;
 	char *orig, *avail, *oavail = NULL, *alg, *replace = NULL;
 	char **proposal;
 	size_t maxlen;
 	int ktype, r;
 
 	/* XXX we de-serialize ssh->kex->my, modify it, and change it */
 	if ((r = kex_buf2prop(ssh->kex->my, NULL, &proposal)) != 0)
 		return r;
 	orig = proposal[PROPOSAL_SERVER_HOST_KEY_ALGS];
 	if ((oavail = avail = strdup(orig)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	maxlen = strlen(avail) + 1;
 	if ((replace = calloc(1, maxlen)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	*replace = '\0';
 	while ((alg = strsep(&avail, ",")) && *alg != '\0') {
 		if ((ktype = sshkey_type_from_name(alg)) == KEY_UNSPEC)
 			continue;
 		TAILQ_FOREACH(k, &ssh->public_keys, next) {
 			if (k->key->type == ktype ||
 			    (sshkey_is_cert(k->key) && k->key->type ==
 			    sshkey_type_plain(ktype))) {
 				if (*replace != '\0')
 					strlcat(replace, ",", maxlen);
 				strlcat(replace, alg, maxlen);
 				break;
 			}
 		}
 	}
 	if (*replace != '\0') {
 		debug2_f("orig/%d    %s", ssh->kex->server, orig);
 		debug2_f("replace/%d %s", ssh->kex->server, replace);
 		free(orig);
 		proposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = replace;
 		replace = NULL;	/* owned by proposal */
 		r = kex_prop2buf(ssh->kex->my, proposal);
 	}
  out:
 	free(oavail);
 	free(replace);
 	kex_prop_free(proposal);
 	return r;
 }
 
 int
 _ssh_host_key_sign(struct ssh *ssh, struct sshkey *privkey,
     struct sshkey *pubkey, u_char **signature, size_t *slen,
     const u_char *data, size_t dlen, const char *alg)
 {
 	return sshkey_sign(privkey, signature, slen, data, dlen,
 	    alg, NULL, NULL, ssh->compat);
 }
diff --git a/ssh_config.0 b/ssh_config.0
index 053cabc49314..aaf8b1482ad5 100644
--- a/ssh_config.0
+++ b/ssh_config.0
@@ -1,1418 +1,1425 @@
 SSH_CONFIG(5)                 File Formats Manual                SSH_CONFIG(5)
 
 NAME
      ssh_config M-bM-^@M-^S OpenSSH client configuration file
 
 DESCRIPTION
      ssh(1) obtains configuration data from the following sources in the
      following order:
 
            1.   command-line options
            2.   user's configuration file (~/.ssh/config)
            3.   system-wide configuration file (/etc/ssh/ssh_config)
 
      Unless noted otherwise, for each parameter, the first obtained value will
      be used.  The configuration files contain sections separated by Host
      specifications, and that section is only applied for hosts that match one
      of the patterns given in the specification.  The matched host name is
      usually the one given on the command line (see the CanonicalizeHostname
      option for exceptions).
 
      Since the first obtained value for each parameter is used, more host-
      specific declarations should be given near the beginning of the file, and
      general defaults at the end.
 
      The file contains keyword-argument pairs, one per line.  Lines starting
      with M-bM-^@M-^X#M-bM-^@M-^Y and empty lines are interpreted as comments.  Arguments may
      optionally be enclosed in double quotes (") in order to represent
      arguments containing spaces.  Configuration options may be separated by
      whitespace or optional whitespace and exactly one M-bM-^@M-^X=M-bM-^@M-^Y; the latter format
      is useful to avoid the need to quote whitespace when specifying
      configuration options using the ssh, scp, and sftp -o option.
 
      The possible keywords and their meanings are as follows (note that
      keywords are case-insensitive and arguments are case-sensitive):
 
      Host    Restricts the following declarations (up to the next Host or
              Match keyword) to be only for those hosts that match one of the
              patterns given after the keyword.  If more than one pattern is
              provided, they should be separated by whitespace.  A single M-bM-^@M-^X*M-bM-^@M-^Y
              as a pattern can be used to provide global defaults for all
              hosts.  The host is usually the hostname argument given on the
              command line (see the CanonicalizeHostname keyword for
              exceptions).
 
              A pattern entry may be negated by prefixing it with an
              exclamation mark (M-bM-^@M-^X!M-bM-^@M-^Y).  If a negated entry is matched, then the
              Host entry is ignored, regardless of whether any other patterns
              on the line match.  Negated matches are therefore useful to
              provide exceptions for wildcard matches.
 
              See PATTERNS for more information on patterns.
 
      Match   Restricts the following declarations (up to the next Host or
              Match keyword) to be used only when the conditions following the
              Match keyword are satisfied.  Match conditions are specified
              using one or more criteria or the single token all which always
              matches.  The available criteria keywords are: canonical, final,
-             exec, localnetwork, host, originalhost, Tag, user, and localuser.
-             The all criteria must appear alone or immediately after canonical
-             or final.  Other criteria may be combined arbitrarily.  All
-             criteria but all, canonical, and final require an argument.
-             Criteria may be negated by prepending an exclamation mark (M-bM-^@M-^X!M-bM-^@M-^Y).
+             exec, localnetwork, host, originalhost, tagged, user, and
+             localuser.  The all criteria must appear alone or immediately
+             after canonical or final.  Other criteria may be combined
+             arbitrarily.  All criteria but all, canonical, and final require
+             an argument.  Criteria may be negated by prepending an
+             exclamation mark (M-bM-^@M-^X!M-bM-^@M-^Y).
 
              The canonical keyword matches only when the configuration file is
              being re-parsed after hostname canonicalization (see the
              CanonicalizeHostname option).  This may be useful to specify
              conditions that work with canonical host names only.
 
              The final keyword requests that the configuration be re-parsed
              (regardless of whether CanonicalizeHostname is enabled), and
              matches only during this final pass.  If CanonicalizeHostname is
              enabled, then canonical and final match during the same pass.
 
              The exec keyword executes the specified command under the user's
              shell.  If the command returns a zero exit status then the
              condition is considered true.  Commands containing whitespace
              characters must be quoted.  Arguments to exec accept the tokens
              described in the TOKENS section.
 
              The localnetwork keyword matches the addresses of active local
              network interfaces against the supplied list of networks in CIDR
              format.  This may be convenient for varying the effective
              configuration on devices that roam between networks.  Note that
              network address is not a trustworthy criteria in many situations
              (e.g. when the network is automatically configured using DHCP)
              and so caution should be applied if using it to control security-
              sensitive configuration.
 
              The other keywords' criteria must be single entries or comma-
              separated lists and may use the wildcard and negation operators
              described in the PATTERNS section.  The criteria for the host
              keyword are matched against the target hostname, after any
              substitution by the Hostname or CanonicalizeHostname options.
              The originalhost keyword matches against the hostname as it was
              specified on the command-line.  The tagged keyword matches a tag
              name specified by a prior Tag directive or on the ssh(1) command-
              line using the -P flag.  The user keyword matches against the
              target username on the remote host.  The localuser keyword
              matches against the name of the local user running ssh(1) (this
              keyword may be useful in system-wide ssh_config files).
 
      AddKeysToAgent
              Specifies whether keys should be automatically added to a running
              ssh-agent(1).  If this option is set to yes and a key is loaded
              from a file, the key and its passphrase are added to the agent
              with the default lifetime, as if by ssh-add(1).  If this option
              is set to ask, ssh(1) will require confirmation using the
              SSH_ASKPASS program before adding a key (see ssh-add(1) for
              details).  If this option is set to confirm, each use of the key
              must be confirmed, as if the -c option was specified to
              ssh-add(1).  If this option is set to no, no keys are added to
              the agent.  Alternately, this option may be specified as a time
              interval using the format described in the TIME FORMATS section
              of sshd_config(5) to specify the key's lifetime in ssh-agent(1),
              after which it will automatically be removed.  The argument must
              be no (the default), yes, confirm (optionally followed by a time
              interval), ask or a time interval.
 
      AddressFamily
              Specifies which address family to use when connecting.  Valid
              arguments are any (the default), inet (use IPv4 only), or inet6
              (use IPv6 only).
 
      BatchMode
              If set to yes, user interaction such as password prompts and host
              key confirmation requests will be disabled.  This option is
              useful in scripts and other batch jobs where no user is present
              to interact with ssh(1).  The argument must be yes or no (the
              default).
 
      BindAddress
              Use the specified address on the local machine as the source
              address of the connection.  Only useful on systems with more than
              one address.
 
      BindInterface
              Use the address of the specified interface on the local machine
              as the source address of the connection.
 
      CanonicalDomains
              When CanonicalizeHostname is enabled, this option specifies the
              list of domain suffixes in which to search for the specified
              destination host.
 
      CanonicalizeFallbackLocal
              Specifies whether to fail with an error when hostname
              canonicalization fails.  The default, yes, will attempt to look
              up the unqualified hostname using the system resolver's search
              rules.  A value of no will cause ssh(1) to fail instantly if
              CanonicalizeHostname is enabled and the target hostname cannot be
              found in any of the domains specified by CanonicalDomains.
 
      CanonicalizeHostname
              Controls whether explicit hostname canonicalization is performed.
              The default, no, is not to perform any name rewriting and let the
              system resolver handle all hostname lookups.  If set to yes then,
              for connections that do not use a ProxyCommand or ProxyJump,
              ssh(1) will attempt to canonicalize the hostname specified on the
              command line using the CanonicalDomains suffixes and
              CanonicalizePermittedCNAMEs rules.  If CanonicalizeHostname is
              set to always, then canonicalization is applied to proxied
              connections too.
 
              If this option is enabled, then the configuration files are
              processed again using the new target name to pick up any new
              configuration in matching Host and Match stanzas.  A value of
              none disables the use of a ProxyJump host.
 
      CanonicalizeMaxDots
              Specifies the maximum number of dot characters in a hostname
              before canonicalization is disabled.  The default, 1, allows a
              single dot (i.e. hostname.subdomain).
 
      CanonicalizePermittedCNAMEs
              Specifies rules to determine whether CNAMEs should be followed
              when canonicalizing hostnames.  The rules consist of one or more
              arguments of source_domain_list:target_domain_list, where
              source_domain_list is a pattern-list of domains that may follow
              CNAMEs in canonicalization, and target_domain_list is a pattern-
              list of domains that they may resolve to.
 
              For example, "*.a.example.com:*.b.example.com,*.c.example.com"
              will allow hostnames matching "*.a.example.com" to be
              canonicalized to names in the "*.b.example.com" or
              "*.c.example.com" domains.
 
              A single argument of "none" causes no CNAMEs to be considered for
              canonicalization.  This is the default behaviour.
 
      CASignatureAlgorithms
              Specifies which algorithms are allowed for signing of
              certificates by certificate authorities (CAs).  The default is:
 
                    ssh-ed25519,ecdsa-sha2-nistp256,
                    ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                    sk-ssh-ed25519@openssh.com,
                    sk-ecdsa-sha2-nistp256@openssh.com,
                    rsa-sha2-512,rsa-sha2-256
 
              If the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the
              specified algorithms will be appended to the default set instead
              of replacing them.  If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y
              character, then the specified algorithms (including wildcards)
              will be removed from the default set instead of replacing them.
 
              ssh(1) will not accept host certificates signed using algorithms
              other than those specified.
 
      CertificateFile
              Specifies a file from which the user's certificate is read.  A
              corresponding private key must be provided separately in order to
              use this certificate either from an IdentityFile directive or -i
              flag to ssh(1), via ssh-agent(1), or via a PKCS11Provider or
              SecurityKeyProvider.
 
              Arguments to CertificateFile may use the tilde syntax to refer to
              a user's home directory, the tokens described in the TOKENS
              section and environment variables as described in the ENVIRONMENT
              VARIABLES section.
 
              It is possible to have multiple certificate files specified in
              configuration files; these certificates will be tried in
              sequence.  Multiple CertificateFile directives will add to the
              list of certificates used for authentication.
 
      ChannelTimeout
              Specifies whether and how quickly ssh(1) should close inactive
              channels.  Timeouts are specified as one or more M-bM-^@M-^\type=intervalM-bM-^@M-^]
-             pairs separated by whitespace, where the M-bM-^@M-^\typeM-bM-^@M-^] must be a channel
-             type name (as described in the table below), optionally
-             containing wildcard characters.
+             pairs separated by whitespace, where the M-bM-^@M-^\typeM-bM-^@M-^] must be the
+             special keyword M-bM-^@M-^\globalM-bM-^@M-^] or a channel type name from the list
+             below, optionally containing wildcard characters.
 
              The timeout value M-bM-^@M-^\intervalM-bM-^@M-^] is specified in seconds or may use
              any of the units documented in the TIME FORMATS section.  For
-             example, M-bM-^@M-^\session=5mM-bM-^@M-^] would cause the interactive session to
+             example, M-bM-^@M-^\session=5mM-bM-^@M-^] would cause interactive sessions to
              terminate after five minutes of inactivity.  Specifying a zero
              value disables the inactivity timeout.
 
-             The available channel types include:
+             The special timeout M-bM-^@M-^\globalM-bM-^@M-^] applies to all active channels,
+             taken together.  Traffic on any active channel will reset the
+             timeout, but when the timeout expires then all open channels will
+             be closed.  Note that this global timeout is not matched by
+             wildcards and must be specified explicitly.
+
+             The available channel type names include:
 
              agent-connection
                      Open connections to ssh-agent(1).
 
              direct-tcpip, direct-streamlocal@openssh.com
                      Open TCP or Unix socket (respectively) connections that
                      have been established from a ssh(1) local forwarding,
                      i.e. LocalForward or DynamicForward.
 
              forwarded-tcpip, forwarded-streamlocal@openssh.com
                      Open TCP or Unix socket (respectively) connections that
                      have been established to a sshd(8) listening on behalf of
                      a ssh(1) remote forwarding, i.e. RemoteForward.
 
              session
                      The interactive main session, including shell session,
                      command execution, scp(1), sftp(1), etc.
 
              tun-connection
                      Open TunnelForward connections.
 
              x11-connection
                      Open X11 forwarding sessions.
 
              Note that in all the above cases, terminating an inactive session
              does not guarantee to remove all resources associated with the
              session, e.g. shell processes or X11 clients relating to the
              session may continue to execute.
 
              Moreover, terminating an inactive channel or session does not
              necessarily close the SSH connection, nor does it prevent a
              client from requesting another channel of the same type.  In
              particular, expiring an inactive forwarding session does not
              prevent another identical forwarding from being subsequently
              created.
 
              The default is not to expire channels of any type for inactivity.
 
      CheckHostIP
              If set to yes, ssh(1) will additionally check the host IP address
              in the known_hosts file.  This allows it to detect if a host key
              changed due to DNS spoofing and will add addresses of destination
              hosts to ~/.ssh/known_hosts in the process, regardless of the
              setting of StrictHostKeyChecking.  If the option is set to no
              (the default), the check will not be executed.
 
      Ciphers
              Specifies the ciphers allowed and their order of preference.
              Multiple ciphers must be comma-separated.  If the specified list
              begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the specified ciphers will be
              appended to the default set instead of replacing them.  If the
              specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified
              ciphers (including wildcards) will be removed from the default
              set instead of replacing them.  If the specified list begins with
              a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified ciphers will be placed at the
              head of the default set.
 
              The supported ciphers are:
 
                    3des-cbc
                    aes128-cbc
                    aes192-cbc
                    aes256-cbc
                    aes128-ctr
                    aes192-ctr
                    aes256-ctr
                    aes128-gcm@openssh.com
                    aes256-gcm@openssh.com
                    chacha20-poly1305@openssh.com
 
              The default is:
 
                    chacha20-poly1305@openssh.com,
                    aes128-ctr,aes192-ctr,aes256-ctr,
                    aes128-gcm@openssh.com,aes256-gcm@openssh.com
 
              The list of available ciphers may also be obtained using "ssh -Q
              cipher".
 
      ClearAllForwardings
              Specifies that all local, remote, and dynamic port forwardings
              specified in the configuration files or on the command line be
              cleared.  This option is primarily useful when used from the
              ssh(1) command line to clear port forwardings set in
              configuration files, and is automatically set by scp(1) and
              sftp(1).  The argument must be yes or no (the default).
 
      Compression
              Specifies whether to use compression.  The argument must be yes
              or no (the default).
 
      ConnectionAttempts
              Specifies the number of tries (one per second) to make before
              exiting.  The argument must be an integer.  This may be useful in
              scripts if the connection sometimes fails.  The default is 1.
 
      ConnectTimeout
              Specifies the timeout (in seconds) used when connecting to the
              SSH server, instead of using the default system TCP timeout.
              This timeout is applied both to establishing the connection and
              to performing the initial SSH protocol handshake and key
              exchange.
 
      ControlMaster
              Enables the sharing of multiple sessions over a single network
              connection.  When set to yes, ssh(1) will listen for connections
              on a control socket specified using the ControlPath argument.
              Additional sessions can connect to this socket using the same
              ControlPath with ControlMaster set to no (the default).  These
              sessions will try to reuse the master instance's network
              connection rather than initiating new ones, but will fall back to
              connecting normally if the control socket does not exist, or is
              not listening.
 
              Setting this to ask will cause ssh(1) to listen for control
              connections, but require confirmation using ssh-askpass(1).  If
              the ControlPath cannot be opened, ssh(1) will continue without
              connecting to a master instance.
 
              X11 and ssh-agent(1) forwarding is supported over these
              multiplexed connections, however the display and agent forwarded
              will be the one belonging to the master connection i.e. it is not
              possible to forward multiple displays or agents.
 
              Two additional options allow for opportunistic multiplexing: try
              to use a master connection but fall back to creating a new one if
              one does not already exist.  These options are: auto and autoask.
              The latter requires confirmation like the ask option.
 
      ControlPath
              Specify the path to the control socket used for connection
              sharing as described in the ControlMaster section above or the
              string none to disable connection sharing.  Arguments to
              ControlPath may use the tilde syntax to refer to a user's home
              directory, the tokens described in the TOKENS section and
              environment variables as described in the ENVIRONMENT VARIABLES
              section.  It is recommended that any ControlPath used for
              opportunistic connection sharing include at least %h, %p, and %r
              (or alternatively %C) and be placed in a directory that is not
              writable by other users.  This ensures that shared connections
              are uniquely identified.
 
      ControlPersist
              When used in conjunction with ControlMaster, specifies that the
              master connection should remain open in the background (waiting
              for future client connections) after the initial client
              connection has been closed.  If set to no (the default), then the
              master connection will not be placed into the background, and
              will close as soon as the initial client connection is closed.
              If set to yes or 0, then the master connection will remain in the
              background indefinitely (until killed or closed via a mechanism
              such as the "ssh -O exit").  If set to a time in seconds, or a
              time in any of the formats documented in sshd_config(5), then the
              backgrounded master connection will automatically terminate after
              it has remained idle (with no client connections) for the
              specified time.
 
      DynamicForward
              Specifies that a TCP port on the local machine be forwarded over
              the secure channel, and the application protocol is then used to
              determine where to connect to from the remote machine.
 
              The argument must be [bind_address:]port.  IPv6 addresses can be
              specified by enclosing addresses in square brackets.  By default,
              the local port is bound in accordance with the GatewayPorts
              setting.  However, an explicit bind_address may be used to bind
              the connection to a specific address.  The bind_address of
              localhost indicates that the listening port be bound for local
              use only, while an empty address or M-bM-^@M-^X*M-bM-^@M-^Y indicates that the port
              should be available from all interfaces.
 
              Currently the SOCKS4 and SOCKS5 protocols are supported, and
              ssh(1) will act as a SOCKS server.  Multiple forwardings may be
              specified, and additional forwardings can be given on the command
              line.  Only the superuser can forward privileged ports.
 
      EnableEscapeCommandline
              Enables the command line option in the EscapeChar menu for
              interactive sessions (default M-bM-^@M-^X~CM-bM-^@M-^Y).  By default, the command
              line is disabled.
 
      EnableSSHKeysign
              Setting this option to yes in the global client configuration
              file /etc/ssh/ssh_config enables the use of the helper program
              ssh-keysign(8) during HostbasedAuthentication.  The argument must
              be yes or no (the default).  This option should be placed in the
              non-hostspecific section.  See ssh-keysign(8) for more
              information.
 
      EscapeChar
              Sets the escape character (default: M-bM-^@M-^X~M-bM-^@M-^Y).  The escape character
              can also be set on the command line.  The argument should be a
              single character, M-bM-^@M-^X^M-bM-^@M-^Y followed by a letter, or none to disable
              the escape character entirely (making the connection transparent
              for binary data).
 
      ExitOnForwardFailure
              Specifies whether ssh(1) should terminate the connection if it
              cannot set up all requested dynamic, tunnel, local, and remote
              port forwardings, (e.g. if either end is unable to bind and
              listen on a specified port).  Note that ExitOnForwardFailure does
              not apply to connections made over port forwardings and will not,
              for example, cause ssh(1) to exit if TCP connections to the
              ultimate forwarding destination fail.  The argument must be yes
              or no (the default).
 
      FingerprintHash
              Specifies the hash algorithm used when displaying key
              fingerprints.  Valid options are: md5 and sha256 (the default).
 
      ForkAfterAuthentication
              Requests ssh to go to background just before command execution.
              This is useful if ssh is going to ask for passwords or
              passphrases, but the user wants it in the background.  This
              implies the StdinNull configuration option being set to M-bM-^@M-^\yesM-bM-^@M-^].
              The recommended way to start X11 programs at a remote site is
              with something like ssh -f host xterm, which is the same as ssh
              host xterm if the ForkAfterAuthentication configuration option is
              set to M-bM-^@M-^\yesM-bM-^@M-^].
 
              If the ExitOnForwardFailure configuration option is set to M-bM-^@M-^\yesM-bM-^@M-^],
              then a client started with the ForkAfterAuthentication
              configuration option being set to M-bM-^@M-^\yesM-bM-^@M-^] will wait for all remote
              port forwards to be successfully established before placing
              itself in the background.  The argument to this keyword must be
              yes (same as the -f option) or no (the default).
 
      ForwardAgent
              Specifies whether the connection to the authentication agent (if
              any) will be forwarded to the remote machine.  The argument may
              be yes, no (the default), an explicit path to an agent socket or
              the name of an environment variable (beginning with M-bM-^@M-^X$M-bM-^@M-^Y) in which
              to find the path.
 
              Agent forwarding should be enabled with caution.  Users with the
              ability to bypass file permissions on the remote host (for the
              agent's Unix-domain socket) can access the local agent through
              the forwarded connection.  An attacker cannot obtain key material
              from the agent, however they can perform operations on the keys
              that enable them to authenticate using the identities loaded into
              the agent.
 
      ForwardX11
              Specifies whether X11 connections will be automatically
              redirected over the secure channel and DISPLAY set.  The argument
              must be yes or no (the default).
 
              X11 forwarding should be enabled with caution.  Users with the
              ability to bypass file permissions on the remote host (for the
              user's X11 authorization database) can access the local X11
              display through the forwarded connection.  An attacker may then
              be able to perform activities such as keystroke monitoring if the
              ForwardX11Trusted option is also enabled.
 
      ForwardX11Timeout
              Specify a timeout for untrusted X11 forwarding using the format
              described in the TIME FORMATS section of sshd_config(5).  X11
              connections received by ssh(1) after this time will be refused.
              Setting ForwardX11Timeout to zero will disable the timeout and
              permit X11 forwarding for the life of the connection.  The
              default is to disable untrusted X11 forwarding after twenty
              minutes has elapsed.
 
      ForwardX11Trusted
              If this option is set to yes, remote X11 clients will have full
              access to the original X11 display.
 
              If this option is set to no (the default), remote X11 clients
              will be considered untrusted and prevented from stealing or
              tampering with data belonging to trusted X11 clients.
              Furthermore, the xauth(1) token used for the session will be set
              to expire after 20 minutes.  Remote clients will be refused
              access after this time.
 
              See the X11 SECURITY extension specification for full details on
              the restrictions imposed on untrusted clients.
 
      GatewayPorts
              Specifies whether remote hosts are allowed to connect to local
              forwarded ports.  By default, ssh(1) binds local port forwardings
              to the loopback address.  This prevents other remote hosts from
              connecting to forwarded ports.  GatewayPorts can be used to
              specify that ssh should bind local port forwardings to the
              wildcard address, thus allowing remote hosts to connect to
              forwarded ports.  The argument must be yes or no (the default).
 
      GlobalKnownHostsFile
              Specifies one or more files to use for the global host key
              database, separated by whitespace.  The default is
              /etc/ssh/ssh_known_hosts, /etc/ssh/ssh_known_hosts2.
 
      GSSAPIAuthentication
              Specifies whether user authentication based on GSSAPI is allowed.
              The default is no.
 
      GSSAPIDelegateCredentials
              Forward (delegate) credentials to the server.  The default is no.
 
      HashKnownHosts
              Indicates that ssh(1) should hash host names and addresses when
              they are added to ~/.ssh/known_hosts.  These hashed names may be
              used normally by ssh(1) and sshd(8), but they do not visually
              reveal identifying information if the file's contents are
              disclosed.  The default is no.  Note that existing names and
              addresses in known hosts files will not be converted
              automatically, but may be manually hashed using ssh-keygen(1).
 
      HostbasedAcceptedAlgorithms
              Specifies the signature algorithms that will be used for
              hostbased authentication as a comma-separated list of patterns.
              Alternately if the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character,
              then the specified signature algorithms will be appended to the
              default set instead of replacing them.  If the specified list
              begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified signature
              algorithms (including wildcards) will be removed from the default
              set instead of replacing them.  If the specified list begins with
              a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified signature algorithms will be
              placed at the head of the default set.  The default for this
              option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ssh-ed25519@openssh.com,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              The -Q option of ssh(1) may be used to list supported signature
              algorithms.  This was formerly named HostbasedKeyTypes.
 
      HostbasedAuthentication
              Specifies whether to try rhosts based authentication with public
              key authentication.  The argument must be yes or no (the
              default).
 
      HostKeyAlgorithms
              Specifies the host key signature algorithms that the client wants
              to use in order of preference.  Alternately if the specified list
              begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the specified signature
              algorithms will be appended to the default set instead of
              replacing them.  If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y
              character, then the specified signature algorithms (including
              wildcards) will be removed from the default set instead of
              replacing them.  If the specified list begins with a M-bM-^@M-^X^M-bM-^@M-^Y
              character, then the specified signature algorithms will be placed
              at the head of the default set.  The default for this option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 sk-ssh-ed25519@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              If hostkeys are known for the destination host then this default
              is modified to prefer their algorithms.
 
              The list of available signature algorithms may also be obtained
              using "ssh -Q HostKeyAlgorithms".
 
      HostKeyAlias
              Specifies an alias that should be used instead of the real host
              name when looking up or saving the host key in the host key
              database files and when validating host certificates.  This
              option is useful for tunneling SSH connections or for multiple
              servers running on a single host.
 
      Hostname
              Specifies the real host name to log into.  This can be used to
              specify nicknames or abbreviations for hosts.  Arguments to
              Hostname accept the tokens described in the TOKENS section.
              Numeric IP addresses are also permitted (both on the command line
              and in Hostname specifications).  The default is the name given
              on the command line.
 
      IdentitiesOnly
              Specifies that ssh(1) should only use the configured
              authentication identity and certificate files (either the default
              files, or those explicitly configured in the ssh_config files or
              passed on the ssh(1) command-line), even if ssh-agent(1) or a
              PKCS11Provider or SecurityKeyProvider offers more identities.
              The argument to this keyword must be yes or no (the default).
              This option is intended for situations where ssh-agent offers
              many different identities.
 
      IdentityAgent
              Specifies the UNIX-domain socket used to communicate with the
              authentication agent.
 
              This option overrides the SSH_AUTH_SOCK environment variable and
              can be used to select a specific agent.  Setting the socket name
              to none disables the use of an authentication agent.  If the
              string "SSH_AUTH_SOCK" is specified, the location of the socket
              will be read from the SSH_AUTH_SOCK environment variable.
              Otherwise if the specified value begins with a M-bM-^@M-^X$M-bM-^@M-^Y character,
              then it will be treated as an environment variable containing the
              location of the socket.
 
              Arguments to IdentityAgent may use the tilde syntax to refer to a
              user's home directory, the tokens described in the TOKENS section
              and environment variables as described in the ENVIRONMENT
              VARIABLES section.
 
      IdentityFile
              Specifies a file from which the user's DSA, ECDSA, authenticator-
              hosted ECDSA, Ed25519, authenticator-hosted Ed25519 or RSA
              authentication identity is read.  You can also specify a public
              key file to use the corresponding private key that is loaded in
              ssh-agent(1) when the private key file is not present locally.
              The default is ~/.ssh/id_rsa, ~/.ssh/id_ecdsa,
              ~/.ssh/id_ecdsa_sk, ~/.ssh/id_ed25519, ~/.ssh/id_ed25519_sk and
              ~/.ssh/id_dsa.  Additionally, any identities represented by the
              authentication agent will be used for authentication unless
              IdentitiesOnly is set.  If no certificates have been explicitly
              specified by CertificateFile, ssh(1) will try to load certificate
              information from the filename obtained by appending -cert.pub to
              the path of a specified IdentityFile.
 
              Arguments to IdentityFile may use the tilde syntax to refer to a
              user's home directory or the tokens described in the TOKENS
              section.  Alternately an argument of none may be used to indicate
              no identity files should be loaded.
 
              It is possible to have multiple identity files specified in
              configuration files; all these identities will be tried in
              sequence.  Multiple IdentityFile directives will add to the list
              of identities tried (this behaviour differs from that of other
              configuration directives).
 
              IdentityFile may be used in conjunction with IdentitiesOnly to
              select which identities in an agent are offered during
              authentication.  IdentityFile may also be used in conjunction
              with CertificateFile in order to provide any certificate also
              needed for authentication with the identity.
 
      IgnoreUnknown
              Specifies a pattern-list of unknown options to be ignored if they
              are encountered in configuration parsing.  This may be used to
              suppress errors if ssh_config contains options that are
              unrecognised by ssh(1).  It is recommended that IgnoreUnknown be
              listed early in the configuration file as it will not be applied
              to unknown options that appear before it.
 
      Include
              Include the specified configuration file(s).  Multiple pathnames
              may be specified and each pathname may contain glob(7) wildcards
              and, for user configurations, shell-like M-bM-^@M-^X~M-bM-^@M-^Y references to user
              home directories.  Wildcards will be expanded and processed in
              lexical order.  Files without absolute paths are assumed to be in
              ~/.ssh if included in a user configuration file or /etc/ssh if
              included from the system configuration file.  Include directive
              may appear inside a Match or Host block to perform conditional
              inclusion.
 
      IPQoS   Specifies the IPv4 type-of-service or DSCP class for connections.
              Accepted values are af11, af12, af13, af21, af22, af23, af31,
              af32, af33, af41, af42, af43, cs0, cs1, cs2, cs3, cs4, cs5, cs6,
              cs7, ef, le, lowdelay, throughput, reliability, a numeric value,
              or none to use the operating system default.  This option may
              take one or two arguments, separated by whitespace.  If one
              argument is specified, it is used as the packet class
              unconditionally.  If two values are specified, the first is
              automatically selected for interactive sessions and the second
              for non-interactive sessions.  The default is af21 (Low-Latency
              Data) for interactive sessions and cs1 (Lower Effort) for non-
              interactive sessions.
 
      KbdInteractiveAuthentication
              Specifies whether to use keyboard-interactive authentication.
              The argument to this keyword must be yes (the default) or no.
              ChallengeResponseAuthentication is a deprecated alias for this.
 
      KbdInteractiveDevices
              Specifies the list of methods to use in keyboard-interactive
              authentication.  Multiple method names must be comma-separated.
              The default is to use the server specified list.  The methods
              available vary depending on what the server supports.  For an
              OpenSSH server, it may be zero or more of: bsdauth and pam.
 
      KexAlgorithms
              Specifies the available KEX (Key Exchange) algorithms.  Multiple
              algorithms must be comma-separated.  If the specified list begins
              with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the specified algorithms will be
              appended to the default set instead of replacing them.  If the
              specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified
              algorithms (including wildcards) will be removed from the default
              set instead of replacing them.  If the specified list begins with
              a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified algorithms will be placed at
              the head of the default set.  The default is:
 
                    sntrup761x25519-sha512@openssh.com,
                    curve25519-sha256,curve25519-sha256@libssh.org,
                    ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,
                    diffie-hellman-group-exchange-sha256,
                    diffie-hellman-group16-sha512,
                    diffie-hellman-group18-sha512,
                    diffie-hellman-group14-sha256
 
              The list of available key exchange algorithms may also be
              obtained using "ssh -Q kex".
 
      KnownHostsCommand
              Specifies a command to use to obtain a list of host keys, in
              addition to those listed in UserKnownHostsFile and
              GlobalKnownHostsFile.  This command is executed after the files
              have been read.  It may write host key lines to standard output
              in identical format to the usual files (described in the
              VERIFYING HOST KEYS section in ssh(1)).  Arguments to
              KnownHostsCommand accept the tokens described in the TOKENS
              section.  The command may be invoked multiple times per
              connection: once when preparing the preference list of host key
              algorithms to use, again to obtain the host key for the requested
              host name and, if CheckHostIP is enabled, one more time to obtain
              the host key matching the server's address.  If the command exits
              abnormally or returns a non-zero exit status then the connection
              is terminated.
 
      LocalCommand
              Specifies a command to execute on the local machine after
              successfully connecting to the server.  The command string
              extends to the end of the line, and is executed with the user's
              shell.  Arguments to LocalCommand accept the tokens described in
              the TOKENS section.
 
              The command is run synchronously and does not have access to the
              session of the ssh(1) that spawned it.  It should not be used for
              interactive commands.
 
              This directive is ignored unless PermitLocalCommand has been
              enabled.
 
      LocalForward
              Specifies that a TCP port on the local machine be forwarded over
              the secure channel to the specified host and port from the remote
              machine.  The first argument specifies the listener and may be
              [bind_address:]port or a Unix domain socket path.  The second
              argument is the destination and may be host:hostport or a Unix
              domain socket path if the remote host supports it.
 
              IPv6 addresses can be specified by enclosing addresses in square
              brackets.  Multiple forwardings may be specified, and additional
              forwardings can be given on the command line.  Only the superuser
              can forward privileged ports.  By default, the local port is
              bound in accordance with the GatewayPorts setting.  However, an
              explicit bind_address may be used to bind the connection to a
              specific address.  The bind_address of localhost indicates that
              the listening port be bound for local use only, while an empty
              address or M-bM-^@M-^X*M-bM-^@M-^Y indicates that the port should be available from
              all interfaces.  Unix domain socket paths may use the tokens
              described in the TOKENS section and environment variables as
              described in the ENVIRONMENT VARIABLES section.
 
      LogLevel
              Gives the verbosity level that is used when logging messages from
              ssh(1).  The possible values are: QUIET, FATAL, ERROR, INFO,
              VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.  The default is INFO.
              DEBUG and DEBUG1 are equivalent.  DEBUG2 and DEBUG3 each specify
              higher levels of verbose output.
 
      LogVerbose
              Specify one or more overrides to LogLevel.  An override consists
              of a pattern lists that matches the source file, function and
              line number to force detailed logging for.  For example, an
              override pattern of:
 
                    kex.c:*:1000,*:kex_exchange_identification():*,packet.c:*
 
              would enable detailed logging for line 1000 of kex.c, everything
              in the kex_exchange_identification() function, and all code in
              the packet.c file.  This option is intended for debugging and no
              overrides are enabled by default.
 
      MACs    Specifies the MAC (message authentication code) algorithms in
              order of preference.  The MAC algorithm is used for data
              integrity protection.  Multiple algorithms must be comma-
              separated.  If the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character,
              then the specified algorithms will be appended to the default set
              instead of replacing them.  If the specified list begins with a
              M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified algorithms (including
              wildcards) will be removed from the default set instead of
              replacing them.  If the specified list begins with a M-bM-^@M-^X^M-bM-^@M-^Y
              character, then the specified algorithms will be placed at the
              head of the default set.
 
              The algorithms that contain "-etm" calculate the MAC after
              encryption (encrypt-then-mac).  These are considered safer and
              their use recommended.
 
              The default is:
 
                    umac-64-etm@openssh.com,umac-128-etm@openssh.com,
                    hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,
                    hmac-sha1-etm@openssh.com,
                    umac-64@openssh.com,umac-128@openssh.com,
                    hmac-sha2-256,hmac-sha2-512,hmac-sha1
 
              The list of available MAC algorithms may also be obtained using
              "ssh -Q mac".
 
      NoHostAuthenticationForLocalhost
              Disable host authentication for localhost (loopback addresses).
              The argument to this keyword must be yes or no (the default).
 
      NumberOfPasswordPrompts
              Specifies the number of password prompts before giving up.  The
              argument to this keyword must be an integer.  The default is 3.
 
      ObscureKeystrokeTiming
              Specifies whether ssh(1) should try to obscure inter-keystroke
              timings from passive observers of network traffic.  If enabled,
              then for interactive sessions, ssh(1) will send keystrokes at
              fixed intervals of a few tens of milliseconds and will send fake
              keystroke packets for some time after typing ceases.  The
              argument to this keyword must be yes, no or an interval specifier
              of the form interval:milliseconds (e.g. interval:80 for 80
              milliseconds).  The default is to obscure keystrokes using a 20ms
              packet interval.  Note that smaller intervals will result in
              higher fake keystroke packet rates.
 
      PasswordAuthentication
              Specifies whether to use password authentication.  The argument
              to this keyword must be yes (the default) or no.
 
      PermitLocalCommand
              Allow local command execution via the LocalCommand option or
              using the !command escape sequence in ssh(1).  The argument must
              be yes or no (the default).
 
      PermitRemoteOpen
              Specifies the destinations to which remote TCP port forwarding is
              permitted when RemoteForward is used as a SOCKS proxy.  The
              forwarding specification must be one of the following forms:
 
                    PermitRemoteOpen host:port
                    PermitRemoteOpen IPv4_addr:port
                    PermitRemoteOpen [IPv6_addr]:port
 
              Multiple forwards may be specified by separating them with
              whitespace.  An argument of any can be used to remove all
              restrictions and permit any forwarding requests.  An argument of
              none can be used to prohibit all forwarding requests.  The
              wildcard M-bM-^@M-^X*M-bM-^@M-^Y can be used for host or port to allow all hosts or
              ports respectively.  Otherwise, no pattern matching or address
              lookups are performed on supplied names.
 
      PKCS11Provider
              Specifies which PKCS#11 provider to use or none to indicate that
              no provider should be used (the default).  The argument to this
              keyword is a path to the PKCS#11 shared library ssh(1) should use
              to communicate with a PKCS#11 token providing keys for user
              authentication.
 
      Port    Specifies the port number to connect on the remote host.  The
              default is 22.
 
      PreferredAuthentications
              Specifies the order in which the client should try authentication
              methods.  This allows a client to prefer one method (e.g.
              keyboard-interactive) over another method (e.g. password).  The
              default is:
 
                    gssapi-with-mic,hostbased,publickey,
                    keyboard-interactive,password
 
      ProxyCommand
              Specifies the command to use to connect to the server.  The
              command string extends to the end of the line, and is executed
              using the user's shell M-bM-^@M-^XexecM-bM-^@M-^Y directive to avoid a lingering
              shell process.
 
              Arguments to ProxyCommand accept the tokens described in the
              TOKENS section.  The command can be basically anything, and
              should read from its standard input and write to its standard
              output.  It should eventually connect an sshd(8) server running
              on some machine, or execute sshd -i somewhere.  Host key
              management will be done using the Hostname of the host being
              connected (defaulting to the name typed by the user).  Setting
              the command to none disables this option entirely.  Note that
              CheckHostIP is not available for connects with a proxy command.
 
              This directive is useful in conjunction with nc(1) and its proxy
              support.  For example, the following directive would connect via
              an HTTP proxy at 192.0.2.0:
 
                 ProxyCommand /usr/bin/nc -X connect -x 192.0.2.0:8080 %h %p
 
      ProxyJump
              Specifies one or more jump proxies as either [user@]host[:port]
              or an ssh URI.  Multiple proxies may be separated by comma
              characters and will be visited sequentially.  Setting this option
              will cause ssh(1) to connect to the target host by first making a
              ssh(1) connection to the specified ProxyJump host and then
              establishing a TCP forwarding to the ultimate target from there.
              Setting the host to none disables this option entirely.
 
              Note that this option will compete with the ProxyCommand option -
              whichever is specified first will prevent later instances of the
              other from taking effect.
 
              Note also that the configuration for the destination host (either
              supplied via the command-line or the configuration file) is not
              generally applied to jump hosts.  ~/.ssh/config should be used if
              specific configuration is required for jump hosts.
 
      ProxyUseFdpass
              Specifies that ProxyCommand will pass a connected file descriptor
              back to ssh(1) instead of continuing to execute and pass data.
              The default is no.
 
      PubkeyAcceptedAlgorithms
              Specifies the signature algorithms that will be used for public
              key authentication as a comma-separated list of patterns.  If the
              specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the algorithms
              after it will be appended to the default instead of replacing it.
              If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the
              specified algorithms (including wildcards) will be removed from
              the default set instead of replacing them.  If the specified list
              begins with a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified algorithms will
              be placed at the head of the default set.  The default for this
              option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ssh-ed25519@openssh.com,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              The list of available signature algorithms may also be obtained
              using "ssh -Q PubkeyAcceptedAlgorithms".
 
      PubkeyAuthentication
              Specifies whether to try public key authentication.  The argument
              to this keyword must be yes (the default), no, unbound or
              host-bound.  The final two options enable public key
              authentication while respectively disabling or enabling the
              OpenSSH host-bound authentication protocol extension required for
              restricted ssh-agent(1) forwarding.
 
      RekeyLimit
              Specifies the maximum amount of data that may be transmitted or
              received before the session key is renegotiated, optionally
              followed by a maximum amount of time that may pass before the
              session key is renegotiated.  The first argument is specified in
              bytes and may have a suffix of M-bM-^@M-^XKM-bM-^@M-^Y, M-bM-^@M-^XMM-bM-^@M-^Y, or M-bM-^@M-^XGM-bM-^@M-^Y to indicate
              Kilobytes, Megabytes, or Gigabytes, respectively.  The default is
              between M-bM-^@M-^X1GM-bM-^@M-^Y and M-bM-^@M-^X4GM-bM-^@M-^Y, depending on the cipher.  The optional
              second value is specified in seconds and may use any of the units
              documented in the TIME FORMATS section of sshd_config(5).  The
              default value for RekeyLimit is default none, which means that
              rekeying is performed after the cipher's default amount of data
              has been sent or received and no time based rekeying is done.
 
      RemoteCommand
              Specifies a command to execute on the remote machine after
              successfully connecting to the server.  The command string
              extends to the end of the line, and is executed with the user's
              shell.  Arguments to RemoteCommand accept the tokens described in
              the TOKENS section.
 
      RemoteForward
              Specifies that a TCP port on the remote machine be forwarded over
              the secure channel.  The remote port may either be forwarded to a
              specified host and port from the local machine, or may act as a
              SOCKS 4/5 proxy that allows a remote client to connect to
              arbitrary destinations from the local machine.  The first
              argument is the listening specification and may be
              [bind_address:]port or, if the remote host supports it, a Unix
              domain socket path.  If forwarding to a specific destination then
              the second argument must be host:hostport or a Unix domain socket
              path, otherwise if no destination argument is specified then the
              remote forwarding will be established as a SOCKS proxy.  When
              acting as a SOCKS proxy, the destination of the connection can be
              restricted by PermitRemoteOpen.
 
              IPv6 addresses can be specified by enclosing addresses in square
              brackets.  Multiple forwardings may be specified, and additional
              forwardings can be given on the command line.  Privileged ports
              can be forwarded only when logging in as root on the remote
              machine.  Unix domain socket paths may use the tokens described
              in the TOKENS section and environment variables as described in
              the ENVIRONMENT VARIABLES section.
 
              If the port argument is 0, the listen port will be dynamically
              allocated on the server and reported to the client at run time.
 
              If the bind_address is not specified, the default is to only bind
              to loopback addresses.  If the bind_address is M-bM-^@M-^X*M-bM-^@M-^Y or an empty
              string, then the forwarding is requested to listen on all
              interfaces.  Specifying a remote bind_address will only succeed
              if the server's GatewayPorts option is enabled (see
              sshd_config(5)).
 
      RequestTTY
              Specifies whether to request a pseudo-tty for the session.  The
              argument may be one of: no (never request a TTY), yes (always
              request a TTY when standard input is a TTY), force (always
              request a TTY) or auto (request a TTY when opening a login
              session).  This option mirrors the -t and -T flags for ssh(1).
 
      RequiredRSASize
              Specifies the minimum RSA key size (in bits) that ssh(1) will
              accept.  User authentication keys smaller than this limit will be
              ignored.  Servers that present host keys smaller than this limit
              will cause the connection to be terminated.  The default is 1024
              bits.  Note that this limit may only be raised from the default.
 
      RevokedHostKeys
              Specifies revoked host public keys.  Keys listed in this file
              will be refused for host authentication.  Note that if this file
              does not exist or is not readable, then host authentication will
              be refused for all hosts.  Keys may be specified as a text file,
              listing one public key per line, or as an OpenSSH Key Revocation
              List (KRL) as generated by ssh-keygen(1).  For more information
              on KRLs, see the KEY REVOCATION LISTS section in ssh-keygen(1).
              Arguments to RevokedHostKeys may use the tilde syntax to refer to
              a user's home directory, the tokens described in the TOKENS
              section and environment variables as described in the ENVIRONMENT
              VARIABLES section.
 
      SecurityKeyProvider
              Specifies a path to a library that will be used when loading any
              FIDO authenticator-hosted keys, overriding the default of using
              the built-in USB HID support.
 
              If the specified value begins with a M-bM-^@M-^X$M-bM-^@M-^Y character, then it will
              be treated as an environment variable containing the path to the
              library.
 
      SendEnv
              Specifies what variables from the local environ(7) should be sent
              to the server.  The server must also support it, and the server
              must be configured to accept these environment variables.  Note
              that the TERM environment variable is always sent whenever a
              pseudo-terminal is requested as it is required by the protocol.
              Refer to AcceptEnv in sshd_config(5) for how to configure the
              server.  Variables are specified by name, which may contain
              wildcard characters.  Multiple environment variables may be
              separated by whitespace or spread across multiple SendEnv
              directives.
 
              See PATTERNS for more information on patterns.
 
              It is possible to clear previously set SendEnv variable names by
              prefixing patterns with -.  The default is not to send any
              environment variables.
 
      ServerAliveCountMax
              Sets the number of server alive messages (see below) which may be
              sent without ssh(1) receiving any messages back from the server.
              If this threshold is reached while server alive messages are
              being sent, ssh will disconnect from the server, terminating the
              session.  It is important to note that the use of server alive
              messages is very different from TCPKeepAlive (below).  The server
              alive messages are sent through the encrypted channel and
              therefore will not be spoofable.  The TCP keepalive option
              enabled by TCPKeepAlive is spoofable.  The server alive mechanism
              is valuable when the client or server depend on knowing when a
              connection has become unresponsive.
 
              The default value is 3.  If, for example, ServerAliveInterval
              (see below) is set to 15 and ServerAliveCountMax is left at the
              default, if the server becomes unresponsive, ssh will disconnect
              after approximately 45 seconds.
 
      ServerAliveInterval
              Sets a timeout interval in seconds after which if no data has
              been received from the server, ssh(1) will send a message through
              the encrypted channel to request a response from the server.  The
              default is 0, indicating that these messages will not be sent to
              the server.
 
      SessionType
              May be used to either request invocation of a subsystem on the
              remote system, or to prevent the execution of a remote command at
              all.  The latter is useful for just forwarding ports.  The
              argument to this keyword must be none (same as the -N option),
              subsystem (same as the -s option) or default (shell or command
              execution).
 
      SetEnv  Directly specify one or more environment variables and their
              contents to be sent to the server.  Similarly to SendEnv, with
              the exception of the TERM variable, the server must be prepared
              to accept the environment variable.
 
      StdinNull
              Redirects stdin from /dev/null (actually, prevents reading from
              stdin).  Either this or the equivalent -n option must be used
              when ssh is run in the background.  The argument to this keyword
              must be yes (same as the -n option) or no (the default).
 
      StreamLocalBindMask
              Sets the octal file creation mode mask (umask) used when creating
              a Unix-domain socket file for local or remote port forwarding.
              This option is only used for port forwarding to a Unix-domain
              socket file.
 
              The default value is 0177, which creates a Unix-domain socket
              file that is readable and writable only by the owner.  Note that
              not all operating systems honor the file mode on Unix-domain
              socket files.
 
      StreamLocalBindUnlink
              Specifies whether to remove an existing Unix-domain socket file
              for local or remote port forwarding before creating a new one.
              If the socket file already exists and StreamLocalBindUnlink is
              not enabled, ssh will be unable to forward the port to the Unix-
              domain socket file.  This option is only used for port forwarding
              to a Unix-domain socket file.
 
              The argument must be yes or no (the default).
 
      StrictHostKeyChecking
              If this flag is set to yes, ssh(1) will never automatically add
              host keys to the ~/.ssh/known_hosts file, and refuses to connect
              to hosts whose host key has changed.  This provides maximum
              protection against man-in-the-middle (MITM) attacks, though it
              can be annoying when the /etc/ssh/ssh_known_hosts file is poorly
              maintained or when connections to new hosts are frequently made.
              This option forces the user to manually add all new hosts.
 
              If this flag is set to accept-new then ssh will automatically add
              new host keys to the user's known_hosts file, but will not permit
              connections to hosts with changed host keys.  If this flag is set
              to no or off, ssh will automatically add new host keys to the
              user known hosts files and allow connections to hosts with
              changed hostkeys to proceed, subject to some restrictions.  If
              this flag is set to ask (the default), new host keys will be
              added to the user known host files only after the user has
              confirmed that is what they really want to do, and ssh will
              refuse to connect to hosts whose host key has changed.  The host
              keys of known hosts will be verified automatically in all cases.
 
      SyslogFacility
              Gives the facility code that is used when logging messages from
              ssh(1).  The possible values are: DAEMON, USER, AUTH, LOCAL0,
              LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.  The
              default is USER.
 
      TCPKeepAlive
              Specifies whether the system should send TCP keepalive messages
              to the other side.  If they are sent, death of the connection or
              crash of one of the machines will be properly noticed.  However,
              this means that connections will die if the route is down
              temporarily, and some people find it annoying.
 
              The default is yes (to send TCP keepalive messages), and the
              client will notice if the network goes down or the remote host
              dies.  This is important in scripts, and many users want it too.
 
              To disable TCP keepalive messages, the value should be set to no.
              See also ServerAliveInterval for protocol-level keepalives.
 
      Tag     Specify a configuration tag name that may be later used by a
              Match directive to select a block of configuration.
 
      Tunnel  Request tun(4) device forwarding between the client and the
              server.  The argument must be yes, point-to-point (layer 3),
              ethernet (layer 2), or no (the default).  Specifying yes requests
              the default tunnel mode, which is point-to-point.
 
      TunnelDevice
              Specifies the tun(4) devices to open on the client (local_tun)
              and the server (remote_tun).
 
              The argument must be local_tun[:remote_tun].  The devices may be
              specified by numerical ID or the keyword any, which uses the next
              available tunnel device.  If remote_tun is not specified, it
              defaults to any.  The default is any:any.
 
      UpdateHostKeys
              Specifies whether ssh(1) should accept notifications of
              additional hostkeys from the server sent after authentication has
              completed and add them to UserKnownHostsFile.  The argument must
              be yes, no or ask.  This option allows learning alternate
              hostkeys for a server and supports graceful key rotation by
              allowing a server to send replacement public keys before old ones
              are removed.
 
              Additional hostkeys are only accepted if the key used to
              authenticate the host was already trusted or explicitly accepted
              by the user, the host was authenticated via UserKnownHostsFile
              (i.e. not GlobalKnownHostsFile) and the host was authenticated
              using a plain key and not a certificate.
 
              UpdateHostKeys is enabled by default if the user has not
              overridden the default UserKnownHostsFile setting and has not
              enabled VerifyHostKeyDNS, otherwise UpdateHostKeys will be set to
              no.
 
              If UpdateHostKeys is set to ask, then the user is asked to
              confirm the modifications to the known_hosts file.  Confirmation
              is currently incompatible with ControlPersist, and will be
              disabled if it is enabled.
 
              Presently, only sshd(8) from OpenSSH 6.8 and greater support the
              "hostkeys@openssh.com" protocol extension used to inform the
              client of all the server's hostkeys.
 
      User    Specifies the user to log in as.  This can be useful when a
              different user name is used on different machines.  This saves
              the trouble of having to remember to give the user name on the
              command line.
 
      UserKnownHostsFile
              Specifies one or more files to use for the user host key
              database, separated by whitespace.  Each filename may use tilde
              notation to refer to the user's home directory, the tokens
              described in the TOKENS section and environment variables as
              described in the ENVIRONMENT VARIABLES section.  A value of none
              causes ssh(1) to ignore any user-specific known hosts files.  The
              default is ~/.ssh/known_hosts, ~/.ssh/known_hosts2.
 
      VerifyHostKeyDNS
              Specifies whether to verify the remote key using DNS and SSHFP
              resource records.  If this option is set to yes, the client will
              implicitly trust keys that match a secure fingerprint from DNS.
              Insecure fingerprints will be handled as if this option was set
              to ask.  If this option is set to ask, information on fingerprint
              match will be displayed, but the user will still need to confirm
              new host keys according to the StrictHostKeyChecking option.  The
              default is no.
 
              See also VERIFYING HOST KEYS in ssh(1).
 
      VisualHostKey
              If this flag is set to yes, an ASCII art representation of the
              remote host key fingerprint is printed in addition to the
              fingerprint string at login and for unknown host keys.  If this
              flag is set to no (the default), no fingerprint strings are
              printed at login and only the fingerprint string will be printed
              for unknown host keys.
 
      XAuthLocation
              Specifies the full pathname of the xauth(1) program.  The default
              is /usr/X11R6/bin/xauth.
 
 PATTERNS
      A pattern consists of zero or more non-whitespace characters, M-bM-^@M-^X*M-bM-^@M-^Y (a
      wildcard that matches zero or more characters), or M-bM-^@M-^X?M-bM-^@M-^Y (a wildcard that
      matches exactly one character).  For example, to specify a set of
      declarations for any host in the ".co.uk" set of domains, the following
      pattern could be used:
 
            Host *.co.uk
 
      The following pattern would match any host in the 192.168.0.[0-9] network
      range:
 
            Host 192.168.0.?
 
      A pattern-list is a comma-separated list of patterns.  Patterns within
      pattern-lists may be negated by preceding them with an exclamation mark
      (M-bM-^@M-^X!M-bM-^@M-^Y).  For example, to allow a key to be used from anywhere within an
      organization except from the "dialup" pool, the following entry (in
      authorized_keys) could be used:
 
            from="!*.dialup.example.com,*.example.com"
 
      Note that a negated match will never produce a positive result by itself.
      For example, attempting to match "host3" against the following pattern-
      list will fail:
 
            from="!host1,!host2"
 
      The solution here is to include a term that will yield a positive match,
      such as a wildcard:
 
            from="!host1,!host2,*"
 
 TOKENS
      Arguments to some keywords can make use of tokens, which are expanded at
      runtime:
 
            %%    A literal M-bM-^@M-^X%M-bM-^@M-^Y.
            %C    Hash of %l%h%p%r%j.
            %d    Local user's home directory.
            %f    The fingerprint of the server's host key.
            %H    The known_hosts hostname or address that is being searched
                  for.
            %h    The remote hostname.
            %I    A string describing the reason for a KnownHostsCommand
                  execution: either ADDRESS when looking up a host by address
                  (only when CheckHostIP is enabled), HOSTNAME when searching
                  by hostname, or ORDER when preparing the host key algorithm
                  preference list to use for the destination host.
            %i    The local user ID.
            %j    The contents of the ProxyJump option, or the empty string if
                  this option is unset.
            %K    The base64 encoded host key.
            %k    The host key alias if specified, otherwise the original
                  remote hostname given on the command line.
            %L    The local hostname.
            %l    The local hostname, including the domain name.
            %n    The original remote hostname, as given on the command line.
            %p    The remote port.
            %r    The remote username.
            %T    The local tun(4) or tap(4) network interface assigned if
                  tunnel forwarding was requested, or "NONE" otherwise.
            %t    The type of the server host key, e.g.  ssh-ed25519.
            %u    The local username.
 
      CertificateFile, ControlPath, IdentityAgent, IdentityFile,
      KnownHostsCommand, LocalForward, Match exec, RemoteCommand,
      RemoteForward, RevokedHostKeys, and UserKnownHostsFile accept the tokens
      %%, %C, %d, %h, %i, %j, %k, %L, %l, %n, %p, %r, and %u.
 
      KnownHostsCommand additionally accepts the tokens %f, %H, %I, %K and %t.
 
      Hostname accepts the tokens %% and %h.
 
      LocalCommand accepts all tokens.
 
      ProxyCommand and ProxyJump accept the tokens %%, %h, %n, %p, and %r.
 
      Note that some of these directives build commands for execution via the
      shell.  Because ssh(1) performs no filtering or escaping of characters
      that have special meaning in shell commands (e.g. quotes), it is the
      user's responsibility to ensure that the arguments passed to ssh(1) do
      not contain such characters and that tokens are appropriately quoted when
      used.
 
 ENVIRONMENT VARIABLES
      Arguments to some keywords can be expanded at runtime from environment
      variables on the client by enclosing them in ${}, for example
      ${HOME}/.ssh would refer to the user's .ssh directory.  If a specified
      environment variable does not exist then an error will be returned and
      the setting for that keyword will be ignored.
 
      The keywords CertificateFile, ControlPath, IdentityAgent, IdentityFile,
      KnownHostsCommand, and UserKnownHostsFile support environment variables.
      The keywords LocalForward and RemoteForward support environment variables
      only for Unix domain socket paths.
 
 FILES
      ~/.ssh/config
              This is the per-user configuration file.  The format of this file
              is described above.  This file is used by the SSH client.
              Because of the potential for abuse, this file must have strict
              permissions: read/write for the user, and not writable by others.
 
      /etc/ssh/ssh_config
              Systemwide configuration file.  This file provides defaults for
              those values that are not specified in the user's configuration
              file, and for those users who do not have a configuration file.
              This file must be world-readable.
 
 SEE ALSO
      ssh(1)
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.
 
-OpenBSD 7.3                    October 12, 2023                    OpenBSD 7.3
+OpenBSD 7.5                    February 21, 2024                   OpenBSD 7.5
diff --git a/ssh_config.5 b/ssh_config.5
index 4bbdfefd12aa..2931d807ebdd 100644
--- a/ssh_config.5
+++ b/ssh_config.5
@@ -1,2345 +1,2355 @@
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 .\"                    All rights reserved
 .\"
 .\" As far as I am concerned, the code I have written for this software
 .\" can be used freely for any purpose.  Any derived versions of this
 .\" software must be clearly marked as such, and if the derived work is
 .\" incompatible with the protocol description in the RFC file, it must be
 .\" called by a name other than "ssh" or "Secure Shell".
 .\"
 .\" Copyright (c) 1999,2000 Markus Friedl.  All rights reserved.
 .\" Copyright (c) 1999 Aaron Campbell.  All rights reserved.
 .\" Copyright (c) 1999 Theo de Raadt.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh_config.5,v 1.391 2023/10/12 02:18:18 djm Exp $
-.Dd $Mdocdate: October 12 2023 $
+.\" $OpenBSD: ssh_config.5,v 1.394 2024/02/21 06:01:13 djm Exp $
+.Dd $Mdocdate: February 21 2024 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
 .Nm ssh_config
 .Nd OpenSSH client configuration file
 .Sh DESCRIPTION
 .Xr ssh 1
 obtains configuration data from the following sources in
 the following order:
 .Pp
 .Bl -enum -offset indent -compact
 .It
 command-line options
 .It
 user's configuration file
 .Pq Pa ~/.ssh/config
 .It
 system-wide configuration file
 .Pq Pa /etc/ssh/ssh_config
 .El
 .Pp
 Unless noted otherwise, for each parameter, the first obtained value
 will be used.
 The configuration files contain sections separated by
 .Cm Host
 specifications, and that section is only applied for hosts that
 match one of the patterns given in the specification.
 The matched host name is usually the one given on the command line
 (see the
 .Cm CanonicalizeHostname
 option for exceptions).
 .Pp
 Since the first obtained value for each parameter is used, more
 host-specific declarations should be given near the beginning of the
 file, and general defaults at the end.
 .Pp
 The file contains keyword-argument pairs, one per line.
 Lines starting with
 .Ql #
 and empty lines are interpreted as comments.
 Arguments may optionally be enclosed in double quotes
 .Pq \&"
 in order to represent arguments containing spaces.
 Configuration options may be separated by whitespace or
 optional whitespace and exactly one
 .Ql = ;
 the latter format is useful to avoid the need to quote whitespace
 when specifying configuration options using the
 .Nm ssh ,
 .Nm scp ,
 and
 .Nm sftp
 .Fl o
 option.
 .Pp
 The possible
 keywords and their meanings are as follows (note that
 keywords are case-insensitive and arguments are case-sensitive):
 .Bl -tag -width Ds
 .It Cm Host
 Restricts the following declarations (up to the next
 .Cm Host
 or
 .Cm Match
 keyword) to be only for those hosts that match one of the patterns
 given after the keyword.
 If more than one pattern is provided, they should be separated by whitespace.
 A single
 .Ql *
 as a pattern can be used to provide global
 defaults for all hosts.
 The host is usually the
 .Ar hostname
 argument given on the command line
 (see the
 .Cm CanonicalizeHostname
 keyword for exceptions).
 .Pp
 A pattern entry may be negated by prefixing it with an exclamation mark
 .Pq Sq !\& .
 If a negated entry is matched, then the
 .Cm Host
 entry is ignored, regardless of whether any other patterns on the line
 match.
 Negated matches are therefore useful to provide exceptions for wildcard
 matches.
 .Pp
 See
 .Sx PATTERNS
 for more information on patterns.
 .It Cm Match
 Restricts the following declarations (up to the next
 .Cm Host
 or
 .Cm Match
 keyword) to be used only when the conditions following the
 .Cm Match
 keyword are satisfied.
 Match conditions are specified using one or more criteria
 or the single token
 .Cm all
 which always matches.
 The available criteria keywords are:
 .Cm canonical ,
 .Cm final ,
 .Cm exec ,
 .Cm localnetwork ,
 .Cm host ,
 .Cm originalhost ,
-.Cm Tag ,
+.Cm tagged ,
 .Cm user ,
 and
 .Cm localuser .
 The
 .Cm all
 criteria must appear alone or immediately after
 .Cm canonical
 or
 .Cm final .
 Other criteria may be combined arbitrarily.
 All criteria but
 .Cm all ,
 .Cm canonical ,
 and
 .Cm final
 require an argument.
 Criteria may be negated by prepending an exclamation mark
 .Pq Sq !\& .
 .Pp
 The
 .Cm canonical
 keyword matches only when the configuration file is being re-parsed
 after hostname canonicalization (see the
 .Cm CanonicalizeHostname
 option).
 This may be useful to specify conditions that work with canonical host
 names only.
 .Pp
 The
 .Cm final
 keyword requests that the configuration be re-parsed (regardless of whether
 .Cm CanonicalizeHostname
 is enabled), and matches only during this final pass.
 If
 .Cm CanonicalizeHostname
 is enabled, then
 .Cm canonical
 and
 .Cm final
 match during the same pass.
 .Pp
 The
 .Cm exec
 keyword executes the specified command under the user's shell.
 If the command returns a zero exit status then the condition is considered true.
 Commands containing whitespace characters must be quoted.
 Arguments to
 .Cm exec
 accept the tokens described in the
 .Sx TOKENS
 section.
 .Pp
 The
 .Cm localnetwork
 keyword matches the addresses of active local network interfaces against the
 supplied list of networks in CIDR format.
 This may be convenient for varying the effective configuration on devices that
 roam between networks.
 Note that network address is not a trustworthy criteria in many
 situations (e.g. when the network is automatically configured using DHCP)
 and so caution should be applied if using it to control security-sensitive
 configuration.
 .Pp
 The other keywords' criteria must be single entries or comma-separated
 lists and may use the wildcard and negation operators described in the
 .Sx PATTERNS
 section.
 The criteria for the
 .Cm host
 keyword are matched against the target hostname, after any substitution
 by the
 .Cm Hostname
 or
 .Cm CanonicalizeHostname
 options.
 The
 .Cm originalhost
 keyword matches against the hostname as it was specified on the command-line.
 The
 .Cm tagged
 keyword matches a tag name specified by a prior
 .Cm Tag
 directive or on the
 .Xr ssh 1
 command-line using the
 .Fl P
 flag.
 The
 .Cm user
 keyword matches against the target username on the remote host.
 The
 .Cm localuser
 keyword matches against the name of the local user running
 .Xr ssh 1
 (this keyword may be useful in system-wide
 .Nm
 files).
 .It Cm AddKeysToAgent
 Specifies whether keys should be automatically added to a running
 .Xr ssh-agent 1 .
 If this option is set to
 .Cm yes
 and a key is loaded from a file, the key and its passphrase are added to
 the agent with the default lifetime, as if by
 .Xr ssh-add 1 .
 If this option is set to
 .Cm ask ,
 .Xr ssh 1
 will require confirmation using the
 .Ev SSH_ASKPASS
 program before adding a key (see
 .Xr ssh-add 1
 for details).
 If this option is set to
 .Cm confirm ,
 each use of the key must be confirmed, as if the
 .Fl c
 option was specified to
 .Xr ssh-add 1 .
 If this option is set to
 .Cm no ,
 no keys are added to the agent.
 Alternately, this option may be specified as a time interval
 using the format described in the
 .Sx TIME FORMATS
 section of
 .Xr sshd_config 5
 to specify the key's lifetime in
 .Xr ssh-agent 1 ,
 after which it will automatically be removed.
 The argument must be
 .Cm no
 (the default),
 .Cm yes ,
 .Cm confirm
 (optionally followed by a time interval),
 .Cm ask
 or a time interval.
 .It Cm AddressFamily
 Specifies which address family to use when connecting.
 Valid arguments are
 .Cm any
 (the default),
 .Cm inet
 (use IPv4 only), or
 .Cm inet6
 (use IPv6 only).
 .It Cm BatchMode
 If set to
 .Cm yes ,
 user interaction such as password prompts and host key confirmation requests
 will be disabled.
 This option is useful in scripts and other batch jobs where no user
 is present to interact with
 .Xr ssh 1 .
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm BindAddress
 Use the specified address on the local machine as the source address of
 the connection.
 Only useful on systems with more than one address.
 .It Cm BindInterface
 Use the address of the specified interface on the local machine as the
 source address of the connection.
 .It Cm CanonicalDomains
 When
 .Cm CanonicalizeHostname
 is enabled, this option specifies the list of domain suffixes in which to
 search for the specified destination host.
 .It Cm CanonicalizeFallbackLocal
 Specifies whether to fail with an error when hostname canonicalization fails.
 The default,
 .Cm yes ,
 will attempt to look up the unqualified hostname using the system resolver's
 search rules.
 A value of
 .Cm no
 will cause
 .Xr ssh 1
 to fail instantly if
 .Cm CanonicalizeHostname
 is enabled and the target hostname cannot be found in any of the domains
 specified by
 .Cm CanonicalDomains .
 .It Cm CanonicalizeHostname
 Controls whether explicit hostname canonicalization is performed.
 The default,
 .Cm no ,
 is not to perform any name rewriting and let the system resolver handle all
 hostname lookups.
 If set to
 .Cm yes
 then, for connections that do not use a
 .Cm ProxyCommand
 or
 .Cm ProxyJump ,
 .Xr ssh 1
 will attempt to canonicalize the hostname specified on the command line
 using the
 .Cm CanonicalDomains
 suffixes and
 .Cm CanonicalizePermittedCNAMEs
 rules.
 If
 .Cm CanonicalizeHostname
 is set to
 .Cm always ,
 then canonicalization is applied to proxied connections too.
 .Pp
 If this option is enabled, then the configuration files are processed
 again using the new target name to pick up any new configuration in matching
 .Cm Host
 and
 .Cm Match
 stanzas.
 A value of
 .Cm none
 disables the use of a
 .Cm ProxyJump
 host.
 .It Cm CanonicalizeMaxDots
 Specifies the maximum number of dot characters in a hostname before
 canonicalization is disabled.
 The default, 1,
 allows a single dot (i.e. hostname.subdomain).
 .It Cm CanonicalizePermittedCNAMEs
 Specifies rules to determine whether CNAMEs should be followed when
 canonicalizing hostnames.
 The rules consist of one or more arguments of
 .Ar source_domain_list : Ns Ar target_domain_list ,
 where
 .Ar source_domain_list
 is a pattern-list of domains that may follow CNAMEs in canonicalization,
 and
 .Ar target_domain_list
 is a pattern-list of domains that they may resolve to.
 .Pp
 For example,
 .Qq *.a.example.com:*.b.example.com,*.c.example.com
 will allow hostnames matching
 .Qq *.a.example.com
 to be canonicalized to names in the
 .Qq *.b.example.com
 or
 .Qq *.c.example.com
 domains.
 .Pp
 A single argument of
 .Qq none
 causes no CNAMEs to be considered for canonicalization.
 This is the default behaviour.
 .It Cm CASignatureAlgorithms
 Specifies which algorithms are allowed for signing of certificates
 by certificate authorities (CAs).
 The default is:
 .Bd -literal -offset indent
 ssh-ed25519,ecdsa-sha2-nistp256,
 ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 If the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 .Pp
 .Xr ssh 1
 will not accept host certificates signed using algorithms other than those
 specified.
 .It Cm CertificateFile
 Specifies a file from which the user's certificate is read.
 A corresponding private key must be provided separately in order
 to use this certificate either
 from an
 .Cm IdentityFile
 directive or
 .Fl i
 flag to
 .Xr ssh 1 ,
 via
 .Xr ssh-agent 1 ,
 or via a
 .Cm PKCS11Provider
 or
 .Cm SecurityKeyProvider .
 .Pp
 Arguments to
 .Cm CertificateFile
 may use the tilde syntax to refer to a user's home directory,
 the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 .Pp
 It is possible to have multiple certificate files specified in
 configuration files; these certificates will be tried in sequence.
 Multiple
 .Cm CertificateFile
 directives will add to the list of certificates used for
 authentication.
 .It Cm ChannelTimeout
 Specifies whether and how quickly
 .Xr ssh 1
 should close inactive channels.
 Timeouts are specified as one or more
 .Dq type=interval
 pairs separated by whitespace, where the
 .Dq type
-must be a channel type name (as described in the table below), optionally
-containing wildcard characters.
+must be the special keyword
+.Dq global
+or a channel type name from the list below, optionally containing
+wildcard characters.
 .Pp
 The timeout value
 .Dq interval
 is specified in seconds or may use any of the units documented in the
 .Sx TIME FORMATS
 section.
 For example,
 .Dq session=5m
-would cause the interactive session to terminate after five minutes of
+would cause interactive sessions to terminate after five minutes of
 inactivity.
 Specifying a zero value disables the inactivity timeout.
 .Pp
-The available channel types include:
+The special timeout
+.Dq global
+applies to all active channels, taken together.
+Traffic on any active channel will reset the timeout, but when the timeout
+expires then all open channels will be closed.
+Note that this global timeout is not matched by wildcards and must be
+specified explicitly.
+.Pp
+The available channel type names include:
 .Bl -tag -width Ds
 .It Cm agent-connection
 Open connections to
 .Xr ssh-agent 1 .
 .It Cm direct-tcpip , Cm direct-streamlocal@openssh.com
 Open TCP or Unix socket (respectively) connections that have
 been established from a
 .Xr ssh 1
 local forwarding, i.e.\&
 .Cm LocalForward
 or
 .Cm DynamicForward .
 .It Cm forwarded-tcpip , Cm forwarded-streamlocal@openssh.com
 Open TCP or Unix socket (respectively) connections that have been
 established to a
 .Xr sshd 8
 listening on behalf of a
 .Xr ssh 1
 remote forwarding, i.e.\&
 .Cm RemoteForward .
 .It Cm session
 The interactive main session, including shell session, command execution,
 .Xr scp 1 ,
 .Xr sftp 1 ,
 etc.
 .It Cm tun-connection
 Open
 .Cm TunnelForward
 connections.
 .It Cm x11-connection
 Open X11 forwarding sessions.
 .El
 .Pp
 Note that in all the above cases, terminating an inactive session does not
 guarantee to remove all resources associated with the session, e.g. shell
 processes or X11 clients relating to the session may continue to execute.
 .Pp
 Moreover, terminating an inactive channel or session does not necessarily
 close the SSH connection, nor does it prevent a client from
 requesting another channel of the same type.
 In particular, expiring an inactive forwarding session does not prevent
 another identical forwarding from being subsequently created.
 .Pp
 The default is not to expire channels of any type for inactivity.
 .It Cm CheckHostIP
 If set to
 .Cm yes ,
 .Xr ssh 1
 will additionally check the host IP address in the
 .Pa known_hosts
 file.
 This allows it to detect if a host key changed due to DNS spoofing
 and will add addresses of destination hosts to
 .Pa ~/.ssh/known_hosts
 in the process, regardless of the setting of
 .Cm StrictHostKeyChecking .
 If the option is set to
 .Cm no
 (the default),
 the check will not be executed.
 .It Cm Ciphers
 Specifies the ciphers allowed and their order of preference.
 Multiple ciphers must be comma-separated.
 If the specified list begins with a
 .Sq +
 character, then the specified ciphers will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified ciphers (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified ciphers will be placed at the head of the
 default set.
 .Pp
 The supported ciphers are:
 .Bd -literal -offset indent
 3des-cbc
 aes128-cbc
 aes192-cbc
 aes256-cbc
 aes128-ctr
 aes192-ctr
 aes256-ctr
 aes128-gcm@openssh.com
 aes256-gcm@openssh.com
 chacha20-poly1305@openssh.com
 .Ed
 .Pp
 The default is:
 .Bd -literal -offset indent
 chacha20-poly1305@openssh.com,
 aes128-ctr,aes192-ctr,aes256-ctr,
 aes128-gcm@openssh.com,aes256-gcm@openssh.com
 .Ed
 .Pp
 The list of available ciphers may also be obtained using
 .Qq ssh -Q cipher .
 .It Cm ClearAllForwardings
 Specifies that all local, remote, and dynamic port forwardings
 specified in the configuration files or on the command line be
 cleared.
 This option is primarily useful when used from the
 .Xr ssh 1
 command line to clear port forwardings set in
 configuration files, and is automatically set by
 .Xr scp 1
 and
 .Xr sftp 1 .
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm Compression
 Specifies whether to use compression.
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm ConnectionAttempts
 Specifies the number of tries (one per second) to make before exiting.
 The argument must be an integer.
 This may be useful in scripts if the connection sometimes fails.
 The default is 1.
 .It Cm ConnectTimeout
 Specifies the timeout (in seconds) used when connecting to the
 SSH server, instead of using the default system TCP timeout.
 This timeout is applied both to establishing the connection and to performing
 the initial SSH protocol handshake and key exchange.
 .It Cm ControlMaster
 Enables the sharing of multiple sessions over a single network connection.
 When set to
 .Cm yes ,
 .Xr ssh 1
 will listen for connections on a control socket specified using the
 .Cm ControlPath
 argument.
 Additional sessions can connect to this socket using the same
 .Cm ControlPath
 with
 .Cm ControlMaster
 set to
 .Cm no
 (the default).
 These sessions will try to reuse the master instance's network connection
 rather than initiating new ones, but will fall back to connecting normally
 if the control socket does not exist, or is not listening.
 .Pp
 Setting this to
 .Cm ask
 will cause
 .Xr ssh 1
 to listen for control connections, but require confirmation using
 .Xr ssh-askpass 1 .
 If the
 .Cm ControlPath
 cannot be opened,
 .Xr ssh 1
 will continue without connecting to a master instance.
 .Pp
 X11 and
 .Xr ssh-agent 1
 forwarding is supported over these multiplexed connections, however the
 display and agent forwarded will be the one belonging to the master
 connection i.e. it is not possible to forward multiple displays or agents.
 .Pp
 Two additional options allow for opportunistic multiplexing: try to use a
 master connection but fall back to creating a new one if one does not already
 exist.
 These options are:
 .Cm auto
 and
 .Cm autoask .
 The latter requires confirmation like the
 .Cm ask
 option.
 .It Cm ControlPath
 Specify the path to the control socket used for connection sharing as described
 in the
 .Cm ControlMaster
 section above or the string
 .Cm none
 to disable connection sharing.
 Arguments to
 .Cm ControlPath
 may use the tilde syntax to refer to a user's home directory,
 the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 It is recommended that any
 .Cm ControlPath
 used for opportunistic connection sharing include
 at least %h, %p, and %r (or alternatively %C) and be placed in a directory
 that is not writable by other users.
 This ensures that shared connections are uniquely identified.
 .It Cm ControlPersist
 When used in conjunction with
 .Cm ControlMaster ,
 specifies that the master connection should remain open
 in the background (waiting for future client connections)
 after the initial client connection has been closed.
 If set to
 .Cm no
 (the default),
 then the master connection will not be placed into the background,
 and will close as soon as the initial client connection is closed.
 If set to
 .Cm yes
 or 0,
 then the master connection will remain in the background indefinitely
 (until killed or closed via a mechanism such as the
 .Qq ssh -O exit ) .
 If set to a time in seconds, or a time in any of the formats documented in
 .Xr sshd_config 5 ,
 then the backgrounded master connection will automatically terminate
 after it has remained idle (with no client connections) for the
 specified time.
 .It Cm DynamicForward
 Specifies that a TCP port on the local machine be forwarded
 over the secure channel, and the application
 protocol is then used to determine where to connect to from the
 remote machine.
 .Pp
 The argument must be
 .Sm off
 .Oo Ar bind_address : Oc Ar port .
 .Sm on
 IPv6 addresses can be specified by enclosing addresses in square brackets.
 By default, the local port is bound in accordance with the
 .Cm GatewayPorts
 setting.
 However, an explicit
 .Ar bind_address
 may be used to bind the connection to a specific address.
 The
 .Ar bind_address
 of
 .Cm localhost
 indicates that the listening port be bound for local use only, while an
 empty address or
 .Sq *
 indicates that the port should be available from all interfaces.
 .Pp
 Currently the SOCKS4 and SOCKS5 protocols are supported, and
 .Xr ssh 1
 will act as a SOCKS server.
 Multiple forwardings may be specified, and
 additional forwardings can be given on the command line.
 Only the superuser can forward privileged ports.
 .It Cm EnableEscapeCommandline
 Enables the command line option in the
 .Cm EscapeChar
 menu for interactive sessions (default
 .Ql ~C ) .
 By default, the command line is disabled.
 .It Cm EnableSSHKeysign
 Setting this option to
 .Cm yes
 in the global client configuration file
 .Pa /etc/ssh/ssh_config
 enables the use of the helper program
 .Xr ssh-keysign 8
 during
 .Cm HostbasedAuthentication .
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 This option should be placed in the non-hostspecific section.
 See
 .Xr ssh-keysign 8
 for more information.
 .It Cm EscapeChar
 Sets the escape character (default:
 .Ql ~ ) .
 The escape character can also
 be set on the command line.
 The argument should be a single character,
 .Ql ^
 followed by a letter, or
 .Cm none
 to disable the escape
 character entirely (making the connection transparent for binary
 data).
 .It Cm ExitOnForwardFailure
 Specifies whether
 .Xr ssh 1
 should terminate the connection if it cannot set up all requested
 dynamic, tunnel, local, and remote port forwardings, (e.g.\&
 if either end is unable to bind and listen on a specified port).
 Note that
 .Cm ExitOnForwardFailure
 does not apply to connections made over port forwardings and will not,
 for example, cause
 .Xr ssh 1
 to exit if TCP connections to the ultimate forwarding destination fail.
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm FingerprintHash
 Specifies the hash algorithm used when displaying key fingerprints.
 Valid options are:
 .Cm md5
 and
 .Cm sha256
 (the default).
 .It Cm ForkAfterAuthentication
 Requests
 .Nm ssh
 to go to background just before command execution.
 This is useful if
 .Nm ssh
 is going to ask for passwords or passphrases, but the user
 wants it in the background.
 This implies the
 .Cm StdinNull
 configuration option being set to
 .Dq yes .
 The recommended way to start X11 programs at a remote site is with
 something like
 .Ic ssh -f host xterm ,
 which is the same as
 .Ic ssh host xterm
 if the
 .Cm ForkAfterAuthentication
 configuration option is set to
 .Dq yes .
 .Pp
 If the
 .Cm ExitOnForwardFailure
 configuration option is set to
 .Dq yes ,
 then a client started with the
 .Cm ForkAfterAuthentication
 configuration option being set to
 .Dq yes
 will wait for all remote port forwards to be successfully established
 before placing itself in the background.
 The argument to this keyword must be
 .Cm yes
 (same as the
 .Fl f
 option) or
 .Cm no
 (the default).
 .It Cm ForwardAgent
 Specifies whether the connection to the authentication agent (if any)
 will be forwarded to the remote machine.
 The argument may be
 .Cm yes ,
 .Cm no
 (the default),
 an explicit path to an agent socket or the name of an environment variable
 (beginning with
 .Sq $ )
 in which to find the path.
 .Pp
 Agent forwarding should be enabled with caution.
 Users with the ability to bypass file permissions on the remote host
 (for the agent's Unix-domain socket)
 can access the local agent through the forwarded connection.
 An attacker cannot obtain key material from the agent,
 however they can perform operations on the keys that enable them to
 authenticate using the identities loaded into the agent.
 .It Cm ForwardX11
 Specifies whether X11 connections will be automatically redirected
 over the secure channel and
 .Ev DISPLAY
 set.
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .Pp
 X11 forwarding should be enabled with caution.
 Users with the ability to bypass file permissions on the remote host
 (for the user's X11 authorization database)
 can access the local X11 display through the forwarded connection.
 An attacker may then be able to perform activities such as keystroke monitoring
 if the
 .Cm ForwardX11Trusted
 option is also enabled.
 .It Cm ForwardX11Timeout
 Specify a timeout for untrusted X11 forwarding
 using the format described in the
 .Sx TIME FORMATS
 section of
 .Xr sshd_config 5 .
 X11 connections received by
 .Xr ssh 1
 after this time will be refused.
 Setting
 .Cm ForwardX11Timeout
 to zero will disable the timeout and permit X11 forwarding for the life
 of the connection.
 The default is to disable untrusted X11 forwarding after twenty minutes has
 elapsed.
 .It Cm ForwardX11Trusted
 If this option is set to
 .Cm yes ,
 remote X11 clients will have full access to the original X11 display.
 .Pp
 If this option is set to
 .Cm no
 (the default),
 remote X11 clients will be considered untrusted and prevented
 from stealing or tampering with data belonging to trusted X11
 clients.
 Furthermore, the
 .Xr xauth 1
 token used for the session will be set to expire after 20 minutes.
 Remote clients will be refused access after this time.
 .Pp
 See the X11 SECURITY extension specification for full details on
 the restrictions imposed on untrusted clients.
 .It Cm GatewayPorts
 Specifies whether remote hosts are allowed to connect to local
 forwarded ports.
 By default,
 .Xr ssh 1
 binds local port forwardings to the loopback address.
 This prevents other remote hosts from connecting to forwarded ports.
 .Cm GatewayPorts
 can be used to specify that ssh
 should bind local port forwardings to the wildcard address,
 thus allowing remote hosts to connect to forwarded ports.
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm GlobalKnownHostsFile
 Specifies one or more files to use for the global
 host key database, separated by whitespace.
 The default is
 .Pa /etc/ssh/ssh_known_hosts ,
 .Pa /etc/ssh/ssh_known_hosts2 .
 .It Cm GSSAPIAuthentication
 Specifies whether user authentication based on GSSAPI is allowed.
 The default is
 .Cm no .
 .It Cm GSSAPIDelegateCredentials
 Forward (delegate) credentials to the server.
 The default is
 .Cm no .
 .It Cm HashKnownHosts
 Indicates that
 .Xr ssh 1
 should hash host names and addresses when they are added to
 .Pa ~/.ssh/known_hosts .
 These hashed names may be used normally by
 .Xr ssh 1
 and
 .Xr sshd 8 ,
 but they do not visually reveal identifying information if the
 file's contents are disclosed.
 The default is
 .Cm no .
 Note that existing names and addresses in known hosts files
 will not be converted automatically,
 but may be manually hashed using
 .Xr ssh-keygen 1 .
 .It Cm HostbasedAcceptedAlgorithms
 Specifies the signature algorithms that will be used for hostbased
 authentication as a comma-separated list of patterns.
 Alternately if the specified list begins with a
 .Sq +
 character, then the specified signature algorithms will be appended
 to the default set instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified signature algorithms (including wildcards)
 will be removed from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified signature algorithms will be placed
 at the head of the default set.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 The
 .Fl Q
 option of
 .Xr ssh 1
 may be used to list supported signature algorithms.
 This was formerly named HostbasedKeyTypes.
 .It Cm HostbasedAuthentication
 Specifies whether to try rhosts based authentication with public key
 authentication.
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm HostKeyAlgorithms
 Specifies the host key signature algorithms
 that the client wants to use in order of preference.
 Alternately if the specified list begins with a
 .Sq +
 character, then the specified signature algorithms will be appended to
 the default set instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified signature algorithms (including wildcards)
 will be removed from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified signature algorithms will be placed
 at the head of the default set.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ecdsa-sha2-nistp256@openssh.com,
 sk-ssh-ed25519@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 If hostkeys are known for the destination host then this default is modified
 to prefer their algorithms.
 .Pp
 The list of available signature algorithms may also be obtained using
 .Qq ssh -Q HostKeyAlgorithms .
 .It Cm HostKeyAlias
 Specifies an alias that should be used instead of the
 real host name when looking up or saving the host key
 in the host key database files and when validating host certificates.
 This option is useful for tunneling SSH connections
 or for multiple servers running on a single host.
 .It Cm Hostname
 Specifies the real host name to log into.
 This can be used to specify nicknames or abbreviations for hosts.
 Arguments to
 .Cm Hostname
 accept the tokens described in the
 .Sx TOKENS
 section.
 Numeric IP addresses are also permitted (both on the command line and in
 .Cm Hostname
 specifications).
 The default is the name given on the command line.
 .It Cm IdentitiesOnly
 Specifies that
 .Xr ssh 1
 should only use the configured authentication identity and certificate files
 (either the default files, or those explicitly configured in the
 .Nm
 files
 or passed on the
 .Xr ssh 1
 command-line),
 even if
 .Xr ssh-agent 1
 or a
 .Cm PKCS11Provider
 or
 .Cm SecurityKeyProvider
 offers more identities.
 The argument to this keyword must be
 .Cm yes
 or
 .Cm no
 (the default).
 This option is intended for situations where ssh-agent
 offers many different identities.
 .It Cm IdentityAgent
 Specifies the
 .Ux Ns -domain
 socket used to communicate with the authentication agent.
 .Pp
 This option overrides the
 .Ev SSH_AUTH_SOCK
 environment variable and can be used to select a specific agent.
 Setting the socket name to
 .Cm none
 disables the use of an authentication agent.
 If the string
 .Qq SSH_AUTH_SOCK
 is specified, the location of the socket will be read from the
 .Ev SSH_AUTH_SOCK
 environment variable.
 Otherwise if the specified value begins with a
 .Sq $
 character, then it will be treated as an environment variable containing
 the location of the socket.
 .Pp
 Arguments to
 .Cm IdentityAgent
 may use the tilde syntax to refer to a user's home directory,
 the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 .It Cm IdentityFile
 Specifies a file from which the user's DSA, ECDSA, authenticator-hosted ECDSA,
 Ed25519, authenticator-hosted Ed25519 or RSA authentication identity is read.
 You can also specify a public key file to use the corresponding
 private key that is loaded in
 .Xr ssh-agent 1
 when the private key file is not present locally.
 The default is
 .Pa ~/.ssh/id_rsa ,
 .Pa ~/.ssh/id_ecdsa ,
 .Pa ~/.ssh/id_ecdsa_sk ,
 .Pa ~/.ssh/id_ed25519 ,
 .Pa ~/.ssh/id_ed25519_sk
 and
 .Pa ~/.ssh/id_dsa .
 Additionally, any identities represented by the authentication agent
 will be used for authentication unless
 .Cm IdentitiesOnly
 is set.
 If no certificates have been explicitly specified by
 .Cm CertificateFile ,
 .Xr ssh 1
 will try to load certificate information from the filename obtained by
 appending
 .Pa -cert.pub
 to the path of a specified
 .Cm IdentityFile .
 .Pp
 Arguments to
 .Cm IdentityFile
 may use the tilde syntax to refer to a user's home directory
 or the tokens described in the
 .Sx TOKENS
 section.
 Alternately an argument of
 .Cm none
 may be used to indicate no identity files should be loaded.
 .Pp
 It is possible to have
 multiple identity files specified in configuration files; all these
 identities will be tried in sequence.
 Multiple
 .Cm IdentityFile
 directives will add to the list of identities tried (this behaviour
 differs from that of other configuration directives).
 .Pp
 .Cm IdentityFile
 may be used in conjunction with
 .Cm IdentitiesOnly
 to select which identities in an agent are offered during authentication.
 .Cm IdentityFile
 may also be used in conjunction with
 .Cm CertificateFile
 in order to provide any certificate also needed for authentication with
 the identity.
 .It Cm IgnoreUnknown
 Specifies a pattern-list of unknown options to be ignored if they are
 encountered in configuration parsing.
 This may be used to suppress errors if
 .Nm
 contains options that are unrecognised by
 .Xr ssh 1 .
 It is recommended that
 .Cm IgnoreUnknown
 be listed early in the configuration file as it will not be applied
 to unknown options that appear before it.
 .It Cm Include
 Include the specified configuration file(s).
 Multiple pathnames may be specified and each pathname may contain
 .Xr glob 7
 wildcards and, for user configurations, shell-like
 .Sq ~
 references to user home directories.
 Wildcards will be expanded and processed in lexical order.
 Files without absolute paths are assumed to be in
 .Pa ~/.ssh
 if included in a user configuration file or
 .Pa /etc/ssh
 if included from the system configuration file.
 .Cm Include
 directive may appear inside a
 .Cm Match
 or
 .Cm Host
 block
 to perform conditional inclusion.
 .It Cm IPQoS
 Specifies the IPv4 type-of-service or DSCP class for connections.
 Accepted values are
 .Cm af11 ,
 .Cm af12 ,
 .Cm af13 ,
 .Cm af21 ,
 .Cm af22 ,
 .Cm af23 ,
 .Cm af31 ,
 .Cm af32 ,
 .Cm af33 ,
 .Cm af41 ,
 .Cm af42 ,
 .Cm af43 ,
 .Cm cs0 ,
 .Cm cs1 ,
 .Cm cs2 ,
 .Cm cs3 ,
 .Cm cs4 ,
 .Cm cs5 ,
 .Cm cs6 ,
 .Cm cs7 ,
 .Cm ef ,
 .Cm le ,
 .Cm lowdelay ,
 .Cm throughput ,
 .Cm reliability ,
 a numeric value, or
 .Cm none
 to use the operating system default.
 This option may take one or two arguments, separated by whitespace.
 If one argument is specified, it is used as the packet class unconditionally.
 If two values are specified, the first is automatically selected for
 interactive sessions and the second for non-interactive sessions.
 The default is
 .Cm af21
 (Low-Latency Data)
 for interactive sessions and
 .Cm cs1
 (Lower Effort)
 for non-interactive sessions.
 .It Cm KbdInteractiveAuthentication
 Specifies whether to use keyboard-interactive authentication.
 The argument to this keyword must be
 .Cm yes
 (the default)
 or
 .Cm no .
 .Cm ChallengeResponseAuthentication
 is a deprecated alias for this.
 .It Cm KbdInteractiveDevices
 Specifies the list of methods to use in keyboard-interactive authentication.
 Multiple method names must be comma-separated.
 The default is to use the server specified list.
 The methods available vary depending on what the server supports.
 For an OpenSSH server,
 it may be zero or more of:
 .Cm bsdauth
 and
 .Cm pam .
 .It Cm KexAlgorithms
 Specifies the available KEX (Key Exchange) algorithms.
 Multiple algorithms must be comma-separated.
 If the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 The default is:
 .Bd -literal -offset indent
 sntrup761x25519-sha512@openssh.com,
 curve25519-sha256,curve25519-sha256@libssh.org,
 ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,
 diffie-hellman-group-exchange-sha256,
 diffie-hellman-group16-sha512,
 diffie-hellman-group18-sha512,
 diffie-hellman-group14-sha256
 .Ed
 .Pp
 The list of available key exchange algorithms may also be obtained using
 .Qq ssh -Q kex .
 .It Cm KnownHostsCommand
 Specifies a command to use to obtain a list of host keys, in addition to
 those listed in
 .Cm UserKnownHostsFile
 and
 .Cm GlobalKnownHostsFile .
 This command is executed after the files have been read.
 It may write host key lines to standard output in identical format to the
 usual files (described in the
 .Sx VERIFYING HOST KEYS
 section in
 .Xr ssh 1 ) .
 Arguments to
 .Cm KnownHostsCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 The command may be invoked multiple times per connection: once when preparing
 the preference list of host key algorithms to use, again to obtain the
 host key for the requested host name and, if
 .Cm CheckHostIP
 is enabled, one more time to obtain the host key matching the server's
 address.
 If the command exits abnormally or returns a non-zero exit status then the
 connection is terminated.
 .It Cm LocalCommand
 Specifies a command to execute on the local machine after successfully
 connecting to the server.
 The command string extends to the end of the line, and is executed with
 the user's shell.
 Arguments to
 .Cm LocalCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 .Pp
 The command is run synchronously and does not have access to the
 session of the
 .Xr ssh 1
 that spawned it.
 It should not be used for interactive commands.
 .Pp
 This directive is ignored unless
 .Cm PermitLocalCommand
 has been enabled.
 .It Cm LocalForward
 Specifies that a TCP port on the local machine be forwarded over
 the secure channel to the specified host and port from the remote machine.
 The first argument specifies the listener and may be
 .Sm off
 .Oo Ar bind_address : Oc Ar port
 .Sm on
 or a Unix domain socket path.
 The second argument is the destination and may be
 .Ar host : Ns Ar hostport
 or a Unix domain socket path if the remote host supports it.
 .Pp
 IPv6 addresses can be specified by enclosing addresses in square brackets.
 Multiple forwardings may be specified, and additional forwardings can be
 given on the command line.
 Only the superuser can forward privileged ports.
 By default, the local port is bound in accordance with the
 .Cm GatewayPorts
 setting.
 However, an explicit
 .Ar bind_address
 may be used to bind the connection to a specific address.
 The
 .Ar bind_address
 of
 .Cm localhost
 indicates that the listening port be bound for local use only, while an
 empty address or
 .Sq *
 indicates that the port should be available from all interfaces.
 Unix domain socket paths may use the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 .It Cm LogLevel
 Gives the verbosity level that is used when logging messages from
 .Xr ssh 1 .
 The possible values are:
 QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.
 The default is INFO.
 DEBUG and DEBUG1 are equivalent.
 DEBUG2 and DEBUG3 each specify higher levels of verbose output.
 .It Cm LogVerbose
 Specify one or more overrides to LogLevel.
 An override consists of a pattern lists that matches the source file, function
 and line number to force detailed logging for.
 For example, an override pattern of:
 .Bd -literal -offset indent
 kex.c:*:1000,*:kex_exchange_identification():*,packet.c:*
 .Ed
 .Pp
 would enable detailed logging for line 1000 of
 .Pa kex.c ,
 everything in the
 .Fn kex_exchange_identification
 function, and all code in the
 .Pa packet.c
 file.
 This option is intended for debugging and no overrides are enabled by default.
 .It Cm MACs
 Specifies the MAC (message authentication code) algorithms
 in order of preference.
 The MAC algorithm is used for data integrity protection.
 Multiple algorithms must be comma-separated.
 If the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 .Pp
 The algorithms that contain
 .Qq -etm
 calculate the MAC after encryption (encrypt-then-mac).
 These are considered safer and their use recommended.
 .Pp
 The default is:
 .Bd -literal -offset indent
 umac-64-etm@openssh.com,umac-128-etm@openssh.com,
 hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,
 hmac-sha1-etm@openssh.com,
 umac-64@openssh.com,umac-128@openssh.com,
 hmac-sha2-256,hmac-sha2-512,hmac-sha1
 .Ed
 .Pp
 The list of available MAC algorithms may also be obtained using
 .Qq ssh -Q mac .
 .It Cm NoHostAuthenticationForLocalhost
 Disable host authentication for localhost (loopback addresses).
 The argument to this keyword must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm NumberOfPasswordPrompts
 Specifies the number of password prompts before giving up.
 The argument to this keyword must be an integer.
 The default is 3.
 .It Cm ObscureKeystrokeTiming
 Specifies whether
 .Xr ssh 1
 should try to obscure inter-keystroke timings from passive observers of
 network traffic.
 If enabled, then for interactive sessions,
 .Xr ssh 1
 will send keystrokes at fixed intervals of a few tens of milliseconds
 and will send fake keystroke packets for some time after typing ceases.
 The argument to this keyword must be
 .Cm yes ,
 .Cm no
 or an interval specifier of the form
 .Cm interval:milliseconds
 (e.g.\&
 .Cm interval:80
 for 80 milliseconds).
 The default is to obscure keystrokes using a 20ms packet interval.
 Note that smaller intervals will result in higher fake keystroke packet rates.
 .It Cm PasswordAuthentication
 Specifies whether to use password authentication.
 The argument to this keyword must be
 .Cm yes
 (the default)
 or
 .Cm no .
 .It Cm PermitLocalCommand
 Allow local command execution via the
 .Ic LocalCommand
 option or using the
 .Ic !\& Ns Ar command
 escape sequence in
 .Xr ssh 1 .
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm PermitRemoteOpen
 Specifies the destinations to which remote TCP port forwarding is permitted when
 .Cm RemoteForward
 is used as a SOCKS proxy.
 The forwarding specification must be one of the following forms:
 .Pp
 .Bl -item -offset indent -compact
 .It
 .Cm PermitRemoteOpen
 .Sm off
 .Ar host : port
 .Sm on
 .It
 .Cm PermitRemoteOpen
 .Sm off
 .Ar IPv4_addr : port
 .Sm on
 .It
 .Cm PermitRemoteOpen
 .Sm off
 .Ar \&[ IPv6_addr \&] : port
 .Sm on
 .El
 .Pp
 Multiple forwards may be specified by separating them with whitespace.
 An argument of
 .Cm any
 can be used to remove all restrictions and permit any forwarding requests.
 An argument of
 .Cm none
 can be used to prohibit all forwarding requests.
 The wildcard
 .Sq *
 can be used for host or port to allow all hosts or ports respectively.
 Otherwise, no pattern matching or address lookups are performed on supplied
 names.
 .It Cm PKCS11Provider
 Specifies which PKCS#11 provider to use or
 .Cm none
 to indicate that no provider should be used (the default).
 The argument to this keyword is a path to the PKCS#11 shared library
 .Xr ssh 1
 should use to communicate with a PKCS#11 token providing keys for user
 authentication.
 .It Cm Port
 Specifies the port number to connect on the remote host.
 The default is 22.
 .It Cm PreferredAuthentications
 Specifies the order in which the client should try authentication methods.
 This allows a client to prefer one method (e.g.\&
 .Cm keyboard-interactive )
 over another method (e.g.\&
 .Cm password ) .
 The default is:
 .Bd -literal -offset indent
 gssapi-with-mic,hostbased,publickey,
 keyboard-interactive,password
 .Ed
 .It Cm ProxyCommand
 Specifies the command to use to connect to the server.
 The command
 string extends to the end of the line, and is executed
 using the user's shell
 .Ql exec
 directive to avoid a lingering shell process.
 .Pp
 Arguments to
 .Cm ProxyCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 The command can be basically anything,
 and should read from its standard input and write to its standard output.
 It should eventually connect an
 .Xr sshd 8
 server running on some machine, or execute
 .Ic sshd -i
 somewhere.
 Host key management will be done using the
 .Cm Hostname
 of the host being connected (defaulting to the name typed by the user).
 Setting the command to
 .Cm none
 disables this option entirely.
 Note that
 .Cm CheckHostIP
 is not available for connects with a proxy command.
 .Pp
 This directive is useful in conjunction with
 .Xr nc 1
 and its proxy support.
 For example, the following directive would connect via an HTTP proxy at
 192.0.2.0:
 .Bd -literal -offset 3n
 ProxyCommand /usr/bin/nc -X connect -x 192.0.2.0:8080 %h %p
 .Ed
 .It Cm ProxyJump
 Specifies one or more jump proxies as either
 .Xo
 .Sm off
 .Op Ar user No @
 .Ar host
 .Op : Ns Ar port
 .Sm on
 or an ssh URI
 .Xc .
 Multiple proxies may be separated by comma characters and will be visited
 sequentially.
 Setting this option will cause
 .Xr ssh 1
 to connect to the target host by first making a
 .Xr ssh 1
 connection to the specified
 .Cm ProxyJump
 host and then establishing a
 TCP forwarding to the ultimate target from there.
 Setting the host to
 .Cm none
 disables this option entirely.
 .Pp
 Note that this option will compete with the
 .Cm ProxyCommand
 option - whichever is specified first will prevent later instances of the
 other from taking effect.
 .Pp
 Note also that the configuration for the destination host (either supplied
 via the command-line or the configuration file) is not generally applied
 to jump hosts.
 .Pa ~/.ssh/config
 should be used if specific configuration is required for jump hosts.
 .It Cm ProxyUseFdpass
 Specifies that
 .Cm ProxyCommand
 will pass a connected file descriptor back to
 .Xr ssh 1
 instead of continuing to execute and pass data.
 The default is
 .Cm no .
 .It Cm PubkeyAcceptedAlgorithms
 Specifies the signature algorithms that will be used for public key
 authentication as a comma-separated list of patterns.
 If the specified list begins with a
 .Sq +
 character, then the algorithms after it will be appended to the default
 instead of replacing it.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 The list of available signature algorithms may also be obtained using
 .Qq ssh -Q PubkeyAcceptedAlgorithms .
 .It Cm PubkeyAuthentication
 Specifies whether to try public key authentication.
 The argument to this keyword must be
 .Cm yes
 (the default),
 .Cm no ,
 .Cm unbound
 or
 .Cm host-bound .
 The final two options enable public key authentication while respectively
 disabling or enabling the OpenSSH host-bound authentication protocol
 extension required for restricted
 .Xr ssh-agent 1
 forwarding.
 .It Cm RekeyLimit
 Specifies the maximum amount of data that may be transmitted or received
 before the session key is renegotiated, optionally followed by a maximum
 amount of time that may pass before the session key is renegotiated.
 The first argument is specified in bytes and may have a suffix of
 .Sq K ,
 .Sq M ,
 or
 .Sq G
 to indicate Kilobytes, Megabytes, or Gigabytes, respectively.
 The default is between
 .Sq 1G
 and
 .Sq 4G ,
 depending on the cipher.
 The optional second value is specified in seconds and may use any of the
 units documented in the TIME FORMATS section of
 .Xr sshd_config 5 .
 The default value for
 .Cm RekeyLimit
 is
 .Cm default none ,
 which means that rekeying is performed after the cipher's default amount
 of data has been sent or received and no time based rekeying is done.
 .It Cm RemoteCommand
 Specifies a command to execute on the remote machine after successfully
 connecting to the server.
 The command string extends to the end of the line, and is executed with
 the user's shell.
 Arguments to
 .Cm RemoteCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 .It Cm RemoteForward
 Specifies that a TCP port on the remote machine be forwarded over
 the secure channel.
 The remote port may either be forwarded to a specified host and port
 from the local machine, or may act as a SOCKS 4/5 proxy that allows a remote
 client to connect to arbitrary destinations from the local machine.
 The first argument is the listening specification and may be
 .Sm off
 .Oo Ar bind_address : Oc Ar port
 .Sm on
 or, if the remote host supports it, a Unix domain socket path.
 If forwarding to a specific destination then the second argument must be
 .Ar host : Ns Ar hostport
 or a Unix domain socket path,
 otherwise if no destination argument is specified then the remote forwarding
 will be established as a SOCKS proxy.
 When acting as a SOCKS proxy, the destination of the connection can be
 restricted by
 .Cm PermitRemoteOpen .
 .Pp
 IPv6 addresses can be specified by enclosing addresses in square brackets.
 Multiple forwardings may be specified, and additional
 forwardings can be given on the command line.
 Privileged ports can be forwarded only when
 logging in as root on the remote machine.
 Unix domain socket paths may use the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 .Pp
 If the
 .Ar port
 argument is 0,
 the listen port will be dynamically allocated on the server and reported
 to the client at run time.
 .Pp
 If the
 .Ar bind_address
 is not specified, the default is to only bind to loopback addresses.
 If the
 .Ar bind_address
 is
 .Ql *
 or an empty string, then the forwarding is requested to listen on all
 interfaces.
 Specifying a remote
 .Ar bind_address
 will only succeed if the server's
 .Cm GatewayPorts
 option is enabled (see
 .Xr sshd_config 5 ) .
 .It Cm RequestTTY
 Specifies whether to request a pseudo-tty for the session.
 The argument may be one of:
 .Cm no
 (never request a TTY),
 .Cm yes
 (always request a TTY when standard input is a TTY),
 .Cm force
 (always request a TTY) or
 .Cm auto
 (request a TTY when opening a login session).
 This option mirrors the
 .Fl t
 and
 .Fl T
 flags for
 .Xr ssh 1 .
 .It Cm RequiredRSASize
 Specifies the minimum RSA key size (in bits) that
 .Xr ssh 1
 will accept.
 User authentication keys smaller than this limit will be ignored.
 Servers that present host keys smaller than this limit will cause the
 connection to be terminated.
 The default is
 .Cm 1024
 bits.
 Note that this limit may only be raised from the default.
 .It Cm RevokedHostKeys
 Specifies revoked host public keys.
 Keys listed in this file will be refused for host authentication.
 Note that if this file does not exist or is not readable,
 then host authentication will be refused for all hosts.
 Keys may be specified as a text file, listing one public key per line, or as
 an OpenSSH Key Revocation List (KRL) as generated by
 .Xr ssh-keygen 1 .
 For more information on KRLs, see the KEY REVOCATION LISTS section in
 .Xr ssh-keygen 1 .
 Arguments to
 .Cm RevokedHostKeys
 may use the tilde syntax to refer to a user's home directory,
 the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 .It Cm SecurityKeyProvider
 Specifies a path to a library that will be used when loading any
 FIDO authenticator-hosted keys, overriding the default of using
 the built-in USB HID support.
 .Pp
 If the specified value begins with a
 .Sq $
 character, then it will be treated as an environment variable containing
 the path to the library.
 .It Cm SendEnv
 Specifies what variables from the local
 .Xr environ 7
 should be sent to the server.
 The server must also support it, and the server must be configured to
 accept these environment variables.
 Note that the
 .Ev TERM
 environment variable is always sent whenever a
 pseudo-terminal is requested as it is required by the protocol.
 Refer to
 .Cm AcceptEnv
 in
 .Xr sshd_config 5
 for how to configure the server.
 Variables are specified by name, which may contain wildcard characters.
 Multiple environment variables may be separated by whitespace or spread
 across multiple
 .Cm SendEnv
 directives.
 .Pp
 See
 .Sx PATTERNS
 for more information on patterns.
 .Pp
 It is possible to clear previously set
 .Cm SendEnv
 variable names by prefixing patterns with
 .Pa - .
 The default is not to send any environment variables.
 .It Cm ServerAliveCountMax
 Sets the number of server alive messages (see below) which may be
 sent without
 .Xr ssh 1
 receiving any messages back from the server.
 If this threshold is reached while server alive messages are being sent,
 ssh will disconnect from the server, terminating the session.
 It is important to note that the use of server alive messages is very
 different from
 .Cm TCPKeepAlive
 (below).
 The server alive messages are sent through the encrypted channel
 and therefore will not be spoofable.
 The TCP keepalive option enabled by
 .Cm TCPKeepAlive
 is spoofable.
 The server alive mechanism is valuable when the client or
 server depend on knowing when a connection has become unresponsive.
 .Pp
 The default value is 3.
 If, for example,
 .Cm ServerAliveInterval
 (see below) is set to 15 and
 .Cm ServerAliveCountMax
 is left at the default, if the server becomes unresponsive,
 ssh will disconnect after approximately 45 seconds.
 .It Cm ServerAliveInterval
 Sets a timeout interval in seconds after which if no data has been received
 from the server,
 .Xr ssh 1
 will send a message through the encrypted
 channel to request a response from the server.
 The default
 is 0, indicating that these messages will not be sent to the server.
 .It Cm SessionType
 May be used to either request invocation of a subsystem on the remote system,
 or to prevent the execution of a remote command at all.
 The latter is useful for just forwarding ports.
 The argument to this keyword must be
 .Cm none
 (same as the
 .Fl N
 option),
 .Cm subsystem
 (same as the
 .Fl s
 option) or
 .Cm default
 (shell or command execution).
 .It Cm SetEnv
 Directly specify one or more environment variables and their contents to
 be sent to the server.
 Similarly to
 .Cm SendEnv ,
 with the exception of the
 .Ev TERM
 variable, the server must be prepared to accept the environment variable.
 .It Cm StdinNull
 Redirects stdin from
 .Pa /dev/null
 (actually, prevents reading from stdin).
 Either this or the equivalent
 .Fl n
 option must be used when
 .Nm ssh
 is run in the background.
 The argument to this keyword must be
 .Cm yes
 (same as the
 .Fl n
 option) or
 .Cm no
 (the default).
 .It Cm StreamLocalBindMask
 Sets the octal file creation mode mask
 .Pq umask
 used when creating a Unix-domain socket file for local or remote
 port forwarding.
 This option is only used for port forwarding to a Unix-domain socket file.
 .Pp
 The default value is 0177, which creates a Unix-domain socket file that is
 readable and writable only by the owner.
 Note that not all operating systems honor the file mode on Unix-domain
 socket files.
 .It Cm StreamLocalBindUnlink
 Specifies whether to remove an existing Unix-domain socket file for local
 or remote port forwarding before creating a new one.
 If the socket file already exists and
 .Cm StreamLocalBindUnlink
 is not enabled,
 .Nm ssh
 will be unable to forward the port to the Unix-domain socket file.
 This option is only used for port forwarding to a Unix-domain socket file.
 .Pp
 The argument must be
 .Cm yes
 or
 .Cm no
 (the default).
 .It Cm StrictHostKeyChecking
 If this flag is set to
 .Cm yes ,
 .Xr ssh 1
 will never automatically add host keys to the
 .Pa ~/.ssh/known_hosts
 file, and refuses to connect to hosts whose host key has changed.
 This provides maximum protection against man-in-the-middle (MITM) attacks,
 though it can be annoying when the
 .Pa /etc/ssh/ssh_known_hosts
 file is poorly maintained or when connections to new hosts are
 frequently made.
 This option forces the user to manually
 add all new hosts.
 .Pp
 If this flag is set to
 .Cm accept-new
 then ssh will automatically add new host keys to the user's
 .Pa known_hosts
 file, but will not permit connections to hosts with
 changed host keys.
 If this flag is set to
 .Cm no
 or
 .Cm off ,
 ssh will automatically add new host keys to the user known hosts files
 and allow connections to hosts with changed hostkeys to proceed,
 subject to some restrictions.
 If this flag is set to
 .Cm ask
 (the default),
 new host keys
 will be added to the user known host files only after the user
 has confirmed that is what they really want to do, and
 ssh will refuse to connect to hosts whose host key has changed.
 The host keys of
 known hosts will be verified automatically in all cases.
 .It Cm SyslogFacility
 Gives the facility code that is used when logging messages from
 .Xr ssh 1 .
 The possible values are: DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2,
 LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
 The default is USER.
 .It Cm TCPKeepAlive
 Specifies whether the system should send TCP keepalive messages to the
 other side.
 If they are sent, death of the connection or crash of one
 of the machines will be properly noticed.
 However, this means that
 connections will die if the route is down temporarily, and some people
 find it annoying.
 .Pp
 The default is
 .Cm yes
 (to send TCP keepalive messages), and the client will notice
 if the network goes down or the remote host dies.
 This is important in scripts, and many users want it too.
 .Pp
 To disable TCP keepalive messages, the value should be set to
 .Cm no .
 See also
 .Cm ServerAliveInterval
 for protocol-level keepalives.
 .It Cm Tag
 Specify a configuration tag name that may be later used by a
 .Cm Match
 directive to select a block of configuration.
 .It Cm Tunnel
 Request
 .Xr tun 4
 device forwarding between the client and the server.
 The argument must be
 .Cm yes ,
 .Cm point-to-point
 (layer 3),
 .Cm ethernet
 (layer 2),
 or
 .Cm no
 (the default).
 Specifying
 .Cm yes
 requests the default tunnel mode, which is
 .Cm point-to-point .
 .It Cm TunnelDevice
 Specifies the
 .Xr tun 4
 devices to open on the client
 .Pq Ar local_tun
 and the server
 .Pq Ar remote_tun .
 .Pp
 The argument must be
 .Sm off
 .Ar local_tun Op : Ar remote_tun .
 .Sm on
 The devices may be specified by numerical ID or the keyword
 .Cm any ,
 which uses the next available tunnel device.
 If
 .Ar remote_tun
 is not specified, it defaults to
 .Cm any .
 The default is
 .Cm any:any .
 .It Cm UpdateHostKeys
 Specifies whether
 .Xr ssh 1
 should accept notifications of additional hostkeys from the server sent
 after authentication has completed and add them to
 .Cm UserKnownHostsFile .
 The argument must be
 .Cm yes ,
 .Cm no
 or
 .Cm ask .
 This option allows learning alternate hostkeys for a server
 and supports graceful key rotation by allowing a server to send replacement
 public keys before old ones are removed.
 .Pp
 Additional hostkeys are only accepted if the key used to authenticate the
 host was already trusted or explicitly accepted by the user, the host was
 authenticated via
 .Cm UserKnownHostsFile
 (i.e. not
 .Cm GlobalKnownHostsFile )
 and the host was authenticated using a plain key and not a certificate.
 .Pp
 .Cm UpdateHostKeys
 is enabled by default if the user has not overridden the default
 .Cm UserKnownHostsFile
 setting and has not enabled
 .Cm VerifyHostKeyDNS ,
 otherwise
 .Cm UpdateHostKeys
 will be set to
 .Cm no .
 .Pp
 If
 .Cm UpdateHostKeys
 is set to
 .Cm ask ,
 then the user is asked to confirm the modifications to the known_hosts file.
 Confirmation is currently incompatible with
 .Cm ControlPersist ,
 and will be disabled if it is enabled.
 .Pp
 Presently, only
 .Xr sshd 8
 from OpenSSH 6.8 and greater support the
 .Qq hostkeys@openssh.com
 protocol extension used to inform the client of all the server's hostkeys.
 .It Cm User
 Specifies the user to log in as.
 This can be useful when a different user name is used on different machines.
 This saves the trouble of
 having to remember to give the user name on the command line.
 .It Cm UserKnownHostsFile
 Specifies one or more files to use for the user
 host key database, separated by whitespace.
 Each filename may use tilde notation to refer to the user's home directory,
 the tokens described in the
 .Sx TOKENS
 section and environment variables as described in the
 .Sx ENVIRONMENT VARIABLES
 section.
 A value of
 .Cm none
 causes
 .Xr ssh 1
 to ignore any user-specific known hosts files.
 The default is
 .Pa ~/.ssh/known_hosts ,
 .Pa ~/.ssh/known_hosts2 .
 .It Cm VerifyHostKeyDNS
 Specifies whether to verify the remote key using DNS and SSHFP resource
 records.
 If this option is set to
 .Cm yes ,
 the client will implicitly trust keys that match a secure fingerprint
 from DNS.
 Insecure fingerprints will be handled as if this option was set to
 .Cm ask .
 If this option is set to
 .Cm ask ,
 information on fingerprint match will be displayed, but the user will still
 need to confirm new host keys according to the
 .Cm StrictHostKeyChecking
 option.
 The default is
 .Cm no .
 .Pp
 See also
 .Sx VERIFYING HOST KEYS
 in
 .Xr ssh 1 .
 .It Cm VisualHostKey
 If this flag is set to
 .Cm yes ,
 an ASCII art representation of the remote host key fingerprint is
 printed in addition to the fingerprint string at login and
 for unknown host keys.
 If this flag is set to
 .Cm no
 (the default),
 no fingerprint strings are printed at login and
 only the fingerprint string will be printed for unknown host keys.
 .It Cm XAuthLocation
 Specifies the full pathname of the
 .Xr xauth 1
 program.
 The default is
 .Pa /usr/X11R6/bin/xauth .
 .El
 .Sh PATTERNS
 A
 .Em pattern
 consists of zero or more non-whitespace characters,
 .Sq *
 (a wildcard that matches zero or more characters),
 or
 .Sq ?\&
 (a wildcard that matches exactly one character).
 For example, to specify a set of declarations for any host in the
 .Qq .co.uk
 set of domains,
 the following pattern could be used:
 .Pp
 .Dl Host *.co.uk
 .Pp
 The following pattern
 would match any host in the 192.168.0.[0-9] network range:
 .Pp
 .Dl Host 192.168.0.?
 .Pp
 A
 .Em pattern-list
 is a comma-separated list of patterns.
 Patterns within pattern-lists may be negated
 by preceding them with an exclamation mark
 .Pq Sq !\& .
 For example,
 to allow a key to be used from anywhere within an organization
 except from the
 .Qq dialup
 pool,
 the following entry (in authorized_keys) could be used:
 .Pp
 .Dl from=\&"!*.dialup.example.com,*.example.com\&"
 .Pp
 Note that a negated match will never produce a positive result by itself.
 For example, attempting to match
 .Qq host3
 against the following pattern-list will fail:
 .Pp
 .Dl from=\&"!host1,!host2\&"
 .Pp
 The solution here is to include a term that will yield a positive match,
 such as a wildcard:
 .Pp
 .Dl from=\&"!host1,!host2,*\&"
 .Sh TOKENS
 Arguments to some keywords can make use of tokens,
 which are expanded at runtime:
 .Pp
 .Bl -tag -width XXXX -offset indent -compact
 .It %%
 A literal
 .Sq % .
 .It \&%C
 Hash of %l%h%p%r%j.
 .It %d
 Local user's home directory.
 .It %f
 The fingerprint of the server's host key.
 .It %H
 The
 .Pa known_hosts
 hostname or address that is being searched for.
 .It %h
 The remote hostname.
 .It \%%I
 A string describing the reason for a
 .Cm KnownHostsCommand
 execution: either
 .Cm ADDRESS
 when looking up a host by address (only when
 .Cm CheckHostIP
 is enabled),
 .Cm HOSTNAME
 when searching by hostname, or
 .Cm ORDER
 when preparing the host key algorithm preference list to use for the
 destination host.
 .It %i
 The local user ID.
 .It %j
 The contents of the ProxyJump option, or the empty string if this
 option is unset.
 .It %K
 The base64 encoded host key.
 .It %k
 The host key alias if specified, otherwise the original remote hostname given
 on the command line.
 .It %L
 The local hostname.
 .It %l
 The local hostname, including the domain name.
 .It %n
 The original remote hostname, as given on the command line.
 .It %p
 The remote port.
 .It %r
 The remote username.
 .It \&%T
 The local
 .Xr tun 4
 or
 .Xr tap 4
 network interface assigned if
 tunnel forwarding was requested, or
 .Qq NONE
 otherwise.
 .It %t
 The type of the server host key, e.g.
 .Cm ssh-ed25519 .
 .It %u
 The local username.
 .El
 .Pp
 .Cm CertificateFile ,
 .Cm ControlPath ,
 .Cm IdentityAgent ,
 .Cm IdentityFile ,
 .Cm KnownHostsCommand ,
 .Cm LocalForward ,
 .Cm Match exec ,
 .Cm RemoteCommand ,
 .Cm RemoteForward ,
 .Cm RevokedHostKeys ,
 and
 .Cm UserKnownHostsFile
 accept the tokens %%, %C, %d, %h, %i, %j, %k, %L, %l, %n, %p, %r, and %u.
 .Pp
 .Cm KnownHostsCommand
 additionally accepts the tokens %f, %H, %I, %K and %t.
 .Pp
 .Cm Hostname
 accepts the tokens %% and %h.
 .Pp
 .Cm LocalCommand
 accepts all tokens.
 .Pp
 .Cm ProxyCommand
 and
 .Cm ProxyJump
 accept the tokens %%, %h, %n, %p, and %r.
 .Pp
 Note that some of these directives build commands for execution via the shell.
 Because
 .Xr ssh 1
 performs no filtering or escaping of characters that have special meaning in
 shell commands (e.g. quotes), it is the user's responsibility to ensure that
 the arguments passed to
 .Xr ssh 1
 do not contain such characters and that tokens are appropriately quoted
 when used.
 .Sh ENVIRONMENT VARIABLES
 Arguments to some keywords can be expanded at runtime from environment
 variables on the client by enclosing them in
 .Ic ${} ,
 for example
 .Ic ${HOME}/.ssh
 would refer to the user's .ssh directory.
 If a specified environment variable does not exist then an error will be
 returned and the setting for that keyword will be ignored.
 .Pp
 The keywords
 .Cm CertificateFile ,
 .Cm ControlPath ,
 .Cm IdentityAgent ,
 .Cm IdentityFile ,
 .Cm KnownHostsCommand ,
 and
 .Cm UserKnownHostsFile
 support environment variables.
 The keywords
 .Cm LocalForward
 and
 .Cm RemoteForward
 support environment variables only for Unix domain socket paths.
 .Sh FILES
 .Bl -tag -width Ds
 .It Pa ~/.ssh/config
 This is the per-user configuration file.
 The format of this file is described above.
 This file is used by the SSH client.
 Because of the potential for abuse, this file must have strict permissions:
 read/write for the user, and not writable by others.
 .It Pa /etc/ssh/ssh_config
 Systemwide configuration file.
 This file provides defaults for those
 values that are not specified in the user's configuration file, and
 for those users who do not have a configuration file.
 This file must be world-readable.
 .El
 .Sh SEE ALSO
 .Xr ssh 1
 .Sh AUTHORS
 .An -nosplit
 OpenSSH is a derivative of the original and free
 ssh 1.2.12 release by
 .An Tatu Ylonen .
 .An Aaron Campbell , Bob Beck , Markus Friedl ,
 .An Niels Provos , Theo de Raadt
 and
 .An Dug Song
 removed many bugs, re-added newer features and
 created OpenSSH.
 .An Markus Friedl
 contributed the support for SSH protocol versions 1.5 and 2.0.
diff --git a/sshbuf-getput-crypto.c b/sshbuf-getput-crypto.c
index 56ffdd86156a..af3f39795d6b 100644
--- a/sshbuf-getput-crypto.c
+++ b/sshbuf-getput-crypto.c
@@ -1,180 +1,180 @@
-/*	$OpenBSD: sshbuf-getput-crypto.c,v 1.10 2022/05/25 06:03:44 djm Exp $	*/
+/*	$OpenBSD: sshbuf-getput-crypto.c,v 1.11 2024/02/01 02:37:33 djm Exp $	*/
 /*
  * Copyright (c) 2011 Damien Miller
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #define SSHBUF_INTERNAL
 #include "includes.h"
 
 #include <sys/types.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/bn.h>
 #ifdef OPENSSL_HAS_ECC
 # include <openssl/ec.h>
 #endif /* OPENSSL_HAS_ECC */
 
 #include "ssherr.h"
 #include "sshbuf.h"
 
 int
 sshbuf_get_bignum2(struct sshbuf *buf, BIGNUM **valp)
 {
 	BIGNUM *v;
 	const u_char *d;
 	size_t len;
 	int r;
 
 	if (valp != NULL)
 		*valp = NULL;
 	if ((r = sshbuf_get_bignum2_bytes_direct(buf, &d, &len)) != 0)
 		return r;
 	if (valp != NULL) {
 		if ((v = BN_new()) == NULL ||
 		    BN_bin2bn(d, len, v) == NULL) {
 			BN_clear_free(v);
 			return SSH_ERR_ALLOC_FAIL;
 		}
 		*valp = v;
 	}
 	return 0;
 }
 
 #ifdef OPENSSL_HAS_ECC
 static int
 get_ec(const u_char *d, size_t len, EC_POINT *v, const EC_GROUP *g)
 {
 	/* Refuse overlong bignums */
 	if (len == 0 || len > SSHBUF_MAX_ECPOINT)
 		return SSH_ERR_ECPOINT_TOO_LARGE;
 	/* Only handle uncompressed points */
 	if (*d != POINT_CONVERSION_UNCOMPRESSED)
 		return SSH_ERR_INVALID_FORMAT;
 	if (v != NULL && EC_POINT_oct2point(g, v, d, len, NULL) != 1)
 		return SSH_ERR_INVALID_FORMAT; /* XXX assumption */
 	return 0;
 }
 
 int
 sshbuf_get_ec(struct sshbuf *buf, EC_POINT *v, const EC_GROUP *g)
 {
 	const u_char *d;
 	size_t len;
 	int r;
 
 	if ((r = sshbuf_peek_string_direct(buf, &d, &len)) < 0)
 		return r;
 	if ((r = get_ec(d, len, v, g)) != 0)
 		return r;
 	/* Skip string */
 	if (sshbuf_get_string_direct(buf, NULL, NULL) != 0) {
 		/* Shouldn't happen */
 		SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR"));
 		SSHBUF_ABORT();
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	return 0;
 }
 
 int
 sshbuf_get_eckey(struct sshbuf *buf, EC_KEY *v)
 {
 	EC_POINT *pt = EC_POINT_new(EC_KEY_get0_group(v));
 	int r;
 	const u_char *d;
 	size_t len;
 
 	if (pt == NULL) {
 		SSHBUF_DBG(("SSH_ERR_ALLOC_FAIL"));
 		return SSH_ERR_ALLOC_FAIL;
 	}
 	if ((r = sshbuf_peek_string_direct(buf, &d, &len)) < 0) {
 		EC_POINT_free(pt);
 		return r;
 	}
 	if ((r = get_ec(d, len, pt, EC_KEY_get0_group(v))) != 0) {
 		EC_POINT_free(pt);
 		return r;
 	}
 	if (EC_KEY_set_public_key(v, pt) != 1) {
 		EC_POINT_free(pt);
 		return SSH_ERR_ALLOC_FAIL; /* XXX assumption */
 	}
 	EC_POINT_free(pt);
 	/* Skip string */
 	if (sshbuf_get_string_direct(buf, NULL, NULL) != 0) {
 		/* Shouldn't happen */
 		SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR"));
 		SSHBUF_ABORT();
 		return SSH_ERR_INTERNAL_ERROR;
 	}
-	return 0;	
+	return 0;
 }
 #endif /* OPENSSL_HAS_ECC */
 
 int
 sshbuf_put_bignum2(struct sshbuf *buf, const BIGNUM *v)
 {
 	u_char d[SSHBUF_MAX_BIGNUM + 1];
 	int len = BN_num_bytes(v), prepend = 0, r;
 
 	if (len < 0 || len > SSHBUF_MAX_BIGNUM)
 		return SSH_ERR_INVALID_ARGUMENT;
 	*d = '\0';
 	if (BN_bn2bin(v, d + 1) != len)
 		return SSH_ERR_INTERNAL_ERROR; /* Shouldn't happen */
 	/* If MSB is set, prepend a \0 */
 	if (len > 0 && (d[1] & 0x80) != 0)
 		prepend = 1;
 	if ((r = sshbuf_put_string(buf, d + 1 - prepend, len + prepend)) < 0) {
 		explicit_bzero(d, sizeof(d));
 		return r;
 	}
 	explicit_bzero(d, sizeof(d));
 	return 0;
 }
 
 #ifdef OPENSSL_HAS_ECC
 int
 sshbuf_put_ec(struct sshbuf *buf, const EC_POINT *v, const EC_GROUP *g)
 {
 	u_char d[SSHBUF_MAX_ECPOINT];
 	size_t len;
 	int ret;
 
 	if ((len = EC_POINT_point2oct(g, v, POINT_CONVERSION_UNCOMPRESSED,
 	    NULL, 0, NULL)) > SSHBUF_MAX_ECPOINT) {
 		return SSH_ERR_INVALID_ARGUMENT;
 	}
 	if (EC_POINT_point2oct(g, v, POINT_CONVERSION_UNCOMPRESSED,
 	    d, len, NULL) != len) {
 		return SSH_ERR_INTERNAL_ERROR; /* Shouldn't happen */
 	}
 	ret = sshbuf_put_string(buf, d, len);
 	explicit_bzero(d, len);
 	return ret;
 }
 
 int
 sshbuf_put_eckey(struct sshbuf *buf, const EC_KEY *v)
 {
 	return sshbuf_put_ec(buf, EC_KEY_get0_public_key(v),
 	    EC_KEY_get0_group(v));
 }
 #endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
diff --git a/sshconnect.c b/sshconnect.c
index bd077c75c137..d8efc50ce395 100644
--- a/sshconnect.c
+++ b/sshconnect.c
@@ -1,1729 +1,1731 @@
-/* $OpenBSD: sshconnect.c,v 1.365 2023/11/20 02:50:00 djm Exp $ */
+/* $OpenBSD: sshconnect.c,v 1.366 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * Code to connect to a remote host, and to perform the client side of the
  * login (authentication) dialog.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 
 #include <net/if.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #include <pwd.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
 #include <unistd.h>
 #ifdef HAVE_IFADDRS_H
 # include <ifaddrs.h>
 #endif
 
 #include "xmalloc.h"
 #include "hostfile.h"
 #include "ssh.h"
 #include "sshbuf.h"
 #include "packet.h"
 #include "sshkey.h"
 #include "sshconnect.h"
 #include "log.h"
 #include "misc.h"
 #include "readconf.h"
 #include "atomicio.h"
 #include "dns.h"
 #include "monitor_fdpass.h"
 #include "ssh2.h"
 #include "version.h"
 #include "authfile.h"
 #include "ssherr.h"
 #include "authfd.h"
 #include "kex.h"
 
 struct sshkey *previous_host_key = NULL;
 
 static int matching_host_key_dns = 0;
 
 static pid_t proxy_command_pid = 0;
 
 /* import */
 extern int debug_flag;
 extern Options options;
 extern char *__progname;
 
 static int show_other_keys(struct hostkeys *, struct sshkey *);
 static void warn_changed_key(struct sshkey *);
 
 /* Expand a proxy command */
 static char *
 expand_proxy_command(const char *proxy_command, const char *user,
     const char *host, const char *host_arg, int port)
 {
 	char *tmp, *ret, strport[NI_MAXSERV];
 	const char *keyalias = options.host_key_alias ?
 	    options.host_key_alias : host_arg;
 
 	snprintf(strport, sizeof strport, "%d", port);
 	xasprintf(&tmp, "exec %s", proxy_command);
 	ret = percent_expand(tmp,
 	    "h", host,
 	    "k", keyalias,
 	    "n", host_arg,
 	    "p", strport,
 	    "r", options.user,
 	    (char *)NULL);
 	free(tmp);
 	return ret;
 }
 
 /*
  * Connect to the given ssh server using a proxy command that passes a
  * a connected fd back to us.
  */
 static int
 ssh_proxy_fdpass_connect(struct ssh *ssh, const char *host,
     const char *host_arg, u_short port, const char *proxy_command)
 {
 	char *command_string;
 	int sp[2], sock;
 	pid_t pid;
 	char *shell;
 
 	if ((shell = getenv("SHELL")) == NULL)
 		shell = _PATH_BSHELL;
 
 	if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) == -1)
 		fatal("Could not create socketpair to communicate with "
 		    "proxy dialer: %.100s", strerror(errno));
 
 	command_string = expand_proxy_command(proxy_command, options.user,
 	    host, host_arg, port);
 	debug("Executing proxy dialer command: %.500s", command_string);
 
 	/* Fork and execute the proxy command. */
 	if ((pid = fork()) == 0) {
 		char *argv[10];
 
 		close(sp[1]);
 		/* Redirect stdin and stdout. */
 		if (sp[0] != 0) {
 			if (dup2(sp[0], 0) == -1)
 				perror("dup2 stdin");
 		}
 		if (sp[0] != 1) {
 			if (dup2(sp[0], 1) == -1)
 				perror("dup2 stdout");
 		}
 		if (sp[0] >= 2)
 			close(sp[0]);
 
 		/*
 		 * Stderr is left for non-ControlPersist connections is so
 		 * error messages may be printed on the user's terminal.
 		 */
 		if (!debug_flag && options.control_path != NULL &&
 		    options.control_persist && stdfd_devnull(0, 0, 1) == -1)
 			error_f("stdfd_devnull failed");
 
 		argv[0] = shell;
 		argv[1] = "-c";
 		argv[2] = command_string;
 		argv[3] = NULL;
 
 		/*
 		 * Execute the proxy command.
 		 * Note that we gave up any extra privileges above.
 		 */
 		execv(argv[0], argv);
 		perror(argv[0]);
 		exit(1);
 	}
 	/* Parent. */
 	if (pid == -1)
 		fatal("fork failed: %.100s", strerror(errno));
 	close(sp[0]);
 	free(command_string);
 
 	if ((sock = mm_receive_fd(sp[1])) == -1)
 		fatal("proxy dialer did not pass back a connection");
 	close(sp[1]);
 
 	while (waitpid(pid, NULL, 0) == -1)
 		if (errno != EINTR)
 			fatal("Couldn't wait for child: %s", strerror(errno));
 
 	/* Set the connection file descriptors. */
 	if (ssh_packet_set_connection(ssh, sock, sock) == NULL)
 		return -1; /* ssh_packet_set_connection logs error */
 
 	return 0;
 }
 
 /*
  * Connect to the given ssh server using a proxy command.
  */
 static int
 ssh_proxy_connect(struct ssh *ssh, const char *host, const char *host_arg,
     u_short port, const char *proxy_command)
 {
 	char *command_string;
 	int pin[2], pout[2];
 	pid_t pid;
 	char *shell;
 
 	if ((shell = getenv("SHELL")) == NULL || *shell == '\0')
 		shell = _PATH_BSHELL;
 
 	/* Create pipes for communicating with the proxy. */
 	if (pipe(pin) == -1 || pipe(pout) == -1)
 		fatal("Could not create pipes to communicate with the proxy: %.100s",
 		    strerror(errno));
 
 	command_string = expand_proxy_command(proxy_command, options.user,
 	    host, host_arg, port);
 	debug("Executing proxy command: %.500s", command_string);
 
 	/* Fork and execute the proxy command. */
 	if ((pid = fork()) == 0) {
 		char *argv[10];
 
 		/* Redirect stdin and stdout. */
 		close(pin[1]);
 		if (pin[0] != 0) {
 			if (dup2(pin[0], 0) == -1)
 				perror("dup2 stdin");
 			close(pin[0]);
 		}
 		close(pout[0]);
 		if (dup2(pout[1], 1) == -1)
 			perror("dup2 stdout");
 		/* Cannot be 1 because pin allocated two descriptors. */
 		close(pout[1]);
 
 		/*
 		 * Stderr is left for non-ControlPersist connections is so
 		 * error messages may be printed on the user's terminal.
 		 */
 		if (!debug_flag && options.control_path != NULL &&
 		    options.control_persist && stdfd_devnull(0, 0, 1) == -1)
 			error_f("stdfd_devnull failed");
 
 		argv[0] = shell;
 		argv[1] = "-c";
 		argv[2] = command_string;
 		argv[3] = NULL;
 
 		/*
 		 * Execute the proxy command.  Note that we gave up any
 		 * extra privileges above.
 		 */
 		ssh_signal(SIGPIPE, SIG_DFL);
 		execv(argv[0], argv);
 		perror(argv[0]);
 		exit(1);
 	}
 	/* Parent. */
 	if (pid == -1)
 		fatal("fork failed: %.100s", strerror(errno));
 	else
 		proxy_command_pid = pid; /* save pid to clean up later */
 
 	/* Close child side of the descriptors. */
 	close(pin[0]);
 	close(pout[1]);
 
 	/* Free the command name. */
 	free(command_string);
 
 	/* Set the connection file descriptors. */
 	if (ssh_packet_set_connection(ssh, pout[0], pin[1]) == NULL)
 		return -1; /* ssh_packet_set_connection logs error */
 
 	return 0;
 }
 
 void
 ssh_kill_proxy_command(void)
 {
 	/*
 	 * Send SIGHUP to proxy command if used. We don't wait() in
 	 * case it hangs and instead rely on init to reap the child
 	 */
 	if (proxy_command_pid > 1)
 		kill(proxy_command_pid, SIGHUP);
 }
 
 #ifdef HAVE_IFADDRS_H
 /*
  * Search a interface address list (returned from getifaddrs(3)) for an
  * address that matches the desired address family on the specified interface.
  * Returns 0 and fills in *resultp and *rlenp on success. Returns -1 on failure.
  */
 static int
 check_ifaddrs(const char *ifname, int af, const struct ifaddrs *ifaddrs,
     struct sockaddr_storage *resultp, socklen_t *rlenp)
 {
 	struct sockaddr_in6 *sa6;
 	struct sockaddr_in *sa;
 	struct in6_addr *v6addr;
 	const struct ifaddrs *ifa;
 	int allow_local;
 
 	/*
 	 * Prefer addresses that are not loopback or linklocal, but use them
 	 * if nothing else matches.
 	 */
 	for (allow_local = 0; allow_local < 2; allow_local++) {
 		for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
 			if (ifa->ifa_addr == NULL || ifa->ifa_name == NULL ||
 			    (ifa->ifa_flags & IFF_UP) == 0 ||
 			    ifa->ifa_addr->sa_family != af ||
 			    strcmp(ifa->ifa_name, options.bind_interface) != 0)
 				continue;
 			switch (ifa->ifa_addr->sa_family) {
 			case AF_INET:
 				sa = (struct sockaddr_in *)ifa->ifa_addr;
 				if (!allow_local && sa->sin_addr.s_addr ==
 				    htonl(INADDR_LOOPBACK))
 					continue;
 				if (*rlenp < sizeof(struct sockaddr_in)) {
 					error_f("v4 addr doesn't fit");
 					return -1;
 				}
 				*rlenp = sizeof(struct sockaddr_in);
 				memcpy(resultp, sa, *rlenp);
 				return 0;
 			case AF_INET6:
 				sa6 = (struct sockaddr_in6 *)ifa->ifa_addr;
 				v6addr = &sa6->sin6_addr;
 				if (!allow_local &&
 				    (IN6_IS_ADDR_LINKLOCAL(v6addr) ||
 				    IN6_IS_ADDR_LOOPBACK(v6addr)))
 					continue;
 				if (*rlenp < sizeof(struct sockaddr_in6)) {
 					error_f("v6 addr doesn't fit");
 					return -1;
 				}
 				*rlenp = sizeof(struct sockaddr_in6);
 				memcpy(resultp, sa6, *rlenp);
 				return 0;
 			}
 		}
 	}
 	return -1;
 }
 #endif
 
 /*
  * Creates a socket for use as the ssh connection.
  */
 static int
 ssh_create_socket(struct addrinfo *ai)
 {
 	int sock, r;
 	struct sockaddr_storage bindaddr;
 	socklen_t bindaddrlen = 0;
 	struct addrinfo hints, *res = NULL;
 #ifdef HAVE_IFADDRS_H
 	struct ifaddrs *ifaddrs = NULL;
 #endif
 	char ntop[NI_MAXHOST];
 
 	sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 	if (sock == -1) {
 		error("socket: %s", strerror(errno));
 		return -1;
 	}
 	(void)fcntl(sock, F_SETFD, FD_CLOEXEC);
 
 	/* Use interactive QOS (if specified) until authentication completed */
 	if (options.ip_qos_interactive != INT_MAX)
 		set_sock_tos(sock, options.ip_qos_interactive);
 
 	/* Bind the socket to an alternative local IP address */
 	if (options.bind_address == NULL && options.bind_interface == NULL)
 		return sock;
 
 	if (options.bind_address != NULL) {
 		memset(&hints, 0, sizeof(hints));
 		hints.ai_family = ai->ai_family;
 		hints.ai_socktype = ai->ai_socktype;
 		hints.ai_protocol = ai->ai_protocol;
 		hints.ai_flags = AI_PASSIVE;
 		if ((r = getaddrinfo(options.bind_address, NULL,
 		    &hints, &res)) != 0) {
 			error("getaddrinfo: %s: %s", options.bind_address,
 			    ssh_gai_strerror(r));
 			goto fail;
 		}
 		if (res == NULL) {
 			error("getaddrinfo: no addrs");
 			goto fail;
 		}
 		memcpy(&bindaddr, res->ai_addr, res->ai_addrlen);
 		bindaddrlen = res->ai_addrlen;
 	} else if (options.bind_interface != NULL) {
 #ifdef HAVE_IFADDRS_H
 		if ((r = getifaddrs(&ifaddrs)) != 0) {
 			error("getifaddrs: %s: %s", options.bind_interface,
 			    strerror(errno));
 			goto fail;
 		}
 		bindaddrlen = sizeof(bindaddr);
 		if (check_ifaddrs(options.bind_interface, ai->ai_family,
 		    ifaddrs, &bindaddr, &bindaddrlen) != 0) {
 			logit("getifaddrs: %s: no suitable addresses",
 			    options.bind_interface);
 			goto fail;
 		}
 #else
 		error("BindInterface not supported on this platform.");
 #endif
 	}
 	if ((r = getnameinfo((struct sockaddr *)&bindaddr, bindaddrlen,
 	    ntop, sizeof(ntop), NULL, 0, NI_NUMERICHOST)) != 0) {
 		error_f("getnameinfo failed: %s", ssh_gai_strerror(r));
 		goto fail;
 	}
 	if (bind(sock, (struct sockaddr *)&bindaddr, bindaddrlen) != 0) {
 		error("bind %s: %s", ntop, strerror(errno));
 		goto fail;
 	}
 	debug_f("bound to %s", ntop);
 	/* success */
 	goto out;
 fail:
 	close(sock);
 	sock = -1;
  out:
 	if (res != NULL)
 		freeaddrinfo(res);
 #ifdef HAVE_IFADDRS_H
 	if (ifaddrs != NULL)
 		freeifaddrs(ifaddrs);
 #endif
 	return sock;
 }
 
 /*
  * Opens a TCP/IP connection to the remote server on the given host.
  * The address of the remote host will be returned in hostaddr.
  * If port is 0, the default port will be used.
  * Connection_attempts specifies the maximum number of tries (one per
  * second).  If proxy_command is non-NULL, it specifies the command (with %h
  * and %p substituted for host and port, respectively) to use to contact
  * the daemon.
  */
 static int
 ssh_connect_direct(struct ssh *ssh, const char *host, struct addrinfo *aitop,
     struct sockaddr_storage *hostaddr, u_short port, int connection_attempts,
     int *timeout_ms, int want_keepalive)
 {
 	int on = 1, saved_timeout_ms = *timeout_ms;
 	int oerrno, sock = -1, attempt;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
 	struct addrinfo *ai;
 
 	debug3_f("entering");
 	memset(ntop, 0, sizeof(ntop));
 	memset(strport, 0, sizeof(strport));
 
 	for (attempt = 0; attempt < connection_attempts; attempt++) {
 		if (attempt > 0) {
 			/* Sleep a moment before retrying. */
 			sleep(1);
 			debug("Trying again...");
 		}
 		/*
 		 * Loop through addresses for this host, and try each one in
 		 * sequence until the connection succeeds.
 		 */
 		for (ai = aitop; ai; ai = ai->ai_next) {
 			if (ai->ai_family != AF_INET &&
 			    ai->ai_family != AF_INET6) {
 				errno = EAFNOSUPPORT;
 				continue;
 			}
 			if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
 			    ntop, sizeof(ntop), strport, sizeof(strport),
 			    NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
 				oerrno = errno;
 				error_f("getnameinfo failed");
 				errno = oerrno;
 				continue;
 			}
 			if (options.address_family != AF_UNSPEC &&
 			    ai->ai_family != options.address_family) {
 				debug2_f("skipping address [%s]:%s: "
 				    "wrong address family", ntop, strport);
 				errno = EAFNOSUPPORT;
 				continue;
 			}
 
 			debug("Connecting to %.200s [%.100s] port %s.",
 				host, ntop, strport);
 
 			/* Create a socket for connecting. */
 			sock = ssh_create_socket(ai);
 			if (sock < 0) {
 				/* Any error is already output */
 				errno = 0;
 				continue;
 			}
 
 			*timeout_ms = saved_timeout_ms;
 			if (timeout_connect(sock, ai->ai_addr, ai->ai_addrlen,
 			    timeout_ms) >= 0) {
 				/* Successful connection. */
 				memcpy(hostaddr, ai->ai_addr, ai->ai_addrlen);
 				break;
 			} else {
 				oerrno = errno;
 				debug("connect to address %s port %s: %s",
 				    ntop, strport, strerror(errno));
 				close(sock);
 				sock = -1;
 				errno = oerrno;
 			}
 		}
 		if (sock != -1)
 			break;	/* Successful connection. */
 	}
 
 	/* Return failure if we didn't get a successful connection. */
 	if (sock == -1) {
 		error("ssh: connect to host %s port %s: %s",
 		    host, strport, errno == 0 ? "failure" : strerror(errno));
 		return -1;
 	}
 
 	debug("Connection established.");
 
 	/* Set SO_KEEPALIVE if requested. */
 	if (want_keepalive &&
 	    setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
 	    sizeof(on)) == -1)
 		error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
 
 	/* Set the connection. */
 	if (ssh_packet_set_connection(ssh, sock, sock) == NULL)
 		return -1; /* ssh_packet_set_connection logs error */
 
 	return 0;
 }
 
 int
 ssh_connect(struct ssh *ssh, const char *host, const char *host_arg,
     struct addrinfo *addrs, struct sockaddr_storage *hostaddr, u_short port,
     int connection_attempts, int *timeout_ms, int want_keepalive)
 {
 	int in, out;
 
 	if (options.proxy_command == NULL) {
 		return ssh_connect_direct(ssh, host, addrs, hostaddr, port,
 		    connection_attempts, timeout_ms, want_keepalive);
 	} else if (strcmp(options.proxy_command, "-") == 0) {
 		if ((in = dup(STDIN_FILENO)) == -1 ||
 		    (out = dup(STDOUT_FILENO)) == -1) {
 			if (in >= 0)
 				close(in);
 			error_f("dup() in/out failed");
 			return -1; /* ssh_packet_set_connection logs error */
 		}
 		if ((ssh_packet_set_connection(ssh, in, out)) == NULL)
 			return -1; /* ssh_packet_set_connection logs error */
 		return 0;
 	} else if (options.proxy_use_fdpass) {
 		return ssh_proxy_fdpass_connect(ssh, host, host_arg, port,
 		    options.proxy_command);
 	}
 	return ssh_proxy_connect(ssh, host, host_arg, port,
 	    options.proxy_command);
 }
 
 /* defaults to 'no' */
 static int
 confirm(const char *prompt, const char *fingerprint)
 {
 	const char *msg, *again = "Please type 'yes' or 'no': ";
 	const char *again_fp = "Please type 'yes', 'no' or the fingerprint: ";
 	char *p, *cp;
 	int ret = -1;
 
 	if (options.batch_mode)
 		return 0;
 	for (msg = prompt;;msg = fingerprint ? again_fp : again) {
 		cp = p = read_passphrase(msg, RP_ECHO);
 		if (p == NULL)
 			return 0;
 		p += strspn(p, " \t"); /* skip leading whitespace */
 		p[strcspn(p, " \t\n")] = '\0'; /* remove trailing whitespace */
 		if (p[0] == '\0' || strcasecmp(p, "no") == 0)
 			ret = 0;
 		else if (strcasecmp(p, "yes") == 0 || (fingerprint != NULL &&
 		    strcmp(p, fingerprint) == 0))
 			ret = 1;
 		free(cp);
 		if (ret != -1)
 			return ret;
 	}
 }
 
 static int
 sockaddr_is_local(struct sockaddr *hostaddr)
 {
 	switch (hostaddr->sa_family) {
 	case AF_INET:
 		return (ntohl(((struct sockaddr_in *)hostaddr)->
 		    sin_addr.s_addr) >> 24) == IN_LOOPBACKNET;
 	case AF_INET6:
 		return IN6_IS_ADDR_LOOPBACK(
 		    &(((struct sockaddr_in6 *)hostaddr)->sin6_addr));
 	default:
 		return 0;
 	}
 }
 
 /*
  * Prepare the hostname and ip address strings that are used to lookup
  * host keys in known_hosts files. These may have a port number appended.
  */
 void
 get_hostfile_hostname_ipaddr(char *hostname, struct sockaddr *hostaddr,
     u_short port, char **hostfile_hostname, char **hostfile_ipaddr)
 {
 	char ntop[NI_MAXHOST];
 	socklen_t addrlen;
 
 	switch (hostaddr == NULL ? -1 : hostaddr->sa_family) {
 	case -1:
 		addrlen = 0;
 		break;
 	case AF_INET:
 		addrlen = sizeof(struct sockaddr_in);
 		break;
 	case AF_INET6:
 		addrlen = sizeof(struct sockaddr_in6);
 		break;
 	default:
 		addrlen = sizeof(struct sockaddr);
 		break;
 	}
 
 	/*
 	 * We don't have the remote ip-address for connections
 	 * using a proxy command
 	 */
 	if (hostfile_ipaddr != NULL) {
 		if (options.proxy_command == NULL) {
 			if (getnameinfo(hostaddr, addrlen,
 			    ntop, sizeof(ntop), NULL, 0, NI_NUMERICHOST) != 0)
 			fatal_f("getnameinfo failed");
 			*hostfile_ipaddr = put_host_port(ntop, port);
 		} else {
 			*hostfile_ipaddr = xstrdup("<no hostip for proxy "
 			    "command>");
 		}
 	}
 
 	/*
 	 * Allow the user to record the key under a different name or
 	 * differentiate a non-standard port.  This is useful for ssh
 	 * tunneling over forwarded connections or if you run multiple
 	 * sshd's on different ports on the same machine.
 	 */
 	if (hostfile_hostname != NULL) {
 		if (options.host_key_alias != NULL) {
 			*hostfile_hostname = xstrdup(options.host_key_alias);
 			debug("using hostkeyalias: %s", *hostfile_hostname);
 		} else {
 			*hostfile_hostname = put_host_port(hostname, port);
 		}
 	}
 }
 
 /* returns non-zero if path appears in hostfiles, or 0 if not. */
 static int
 path_in_hostfiles(const char *path, char **hostfiles, u_int num_hostfiles)
 {
 	u_int i;
 
 	for (i = 0; i < num_hostfiles; i++) {
 		if (strcmp(path, hostfiles[i]) == 0)
 			return 1;
 	}
 	return 0;
 }
 
 struct find_by_key_ctx {
 	const char *host, *ip;
 	const struct sshkey *key;
 	char **names;
 	u_int nnames;
 };
 
 /* Try to replace home directory prefix (per $HOME) with a ~/ sequence */
 static char *
 try_tilde_unexpand(const char *path)
 {
 	char *home, *ret = NULL;
 	size_t l;
 
 	if (*path != '/')
 		return xstrdup(path);
 	if ((home = getenv("HOME")) == NULL || (l = strlen(home)) == 0)
 		return xstrdup(path);
 	if (strncmp(path, home, l) != 0)
 		return xstrdup(path);
 	/*
 	 * ensure we have matched on a path boundary: either the $HOME that
 	 * we just compared ends with a '/' or the next character of the path
 	 * must be a '/'.
 	 */
 	if (home[l - 1] != '/' && path[l] != '/')
 		return xstrdup(path);
 	if (path[l] == '/')
 		l++;
 	xasprintf(&ret, "~/%s", path + l);
 	return ret;
 }
 
 static int
 hostkeys_find_by_key_cb(struct hostkey_foreach_line *l, void *_ctx)
 {
 	struct find_by_key_ctx *ctx = (struct find_by_key_ctx *)_ctx;
 	char *path;
 
 	/* we are looking for keys with names that *do not* match */
 	if ((l->match & HKF_MATCH_HOST) != 0)
 		return 0;
 	/* not interested in marker lines */
 	if (l->marker != MRK_NONE)
 		return 0;
 	/* we are only interested in exact key matches */
 	if (l->key == NULL || !sshkey_equal(ctx->key, l->key))
 		return 0;
 	path = try_tilde_unexpand(l->path);
 	debug_f("found matching key in %s:%lu", path, l->linenum);
 	ctx->names = xrecallocarray(ctx->names,
 	    ctx->nnames, ctx->nnames + 1, sizeof(*ctx->names));
 	xasprintf(&ctx->names[ctx->nnames], "%s:%lu: %s", path, l->linenum,
 	    strncmp(l->hosts, HASH_MAGIC, strlen(HASH_MAGIC)) == 0 ?
 	    "[hashed name]" : l->hosts);
 	ctx->nnames++;
 	free(path);
 	return 0;
 }
 
 static int
 hostkeys_find_by_key_hostfile(const char *file, const char *which,
     struct find_by_key_ctx *ctx)
 {
 	int r;
 
 	debug3_f("trying %s hostfile \"%s\"", which, file);
 	if ((r = hostkeys_foreach(file, hostkeys_find_by_key_cb, ctx,
 	    ctx->host, ctx->ip, HKF_WANT_PARSE_KEY, 0)) != 0) {
 		if (r == SSH_ERR_SYSTEM_ERROR && errno == ENOENT) {
 			debug_f("hostkeys file %s does not exist", file);
 			return 0;
 		}
 		error_fr(r, "hostkeys_foreach failed for %s", file);
 		return r;
 	}
 	return 0;
 }
 
 /*
  * Find 'key' in known hosts file(s) that do not match host/ip.
  * Used to display also-known-as information for previously-unseen hostkeys.
  */
 static void
 hostkeys_find_by_key(const char *host, const char *ip, const struct sshkey *key,
     char **user_hostfiles, u_int num_user_hostfiles,
     char **system_hostfiles, u_int num_system_hostfiles,
     char ***names, u_int *nnames)
 {
 	struct find_by_key_ctx ctx = {0, 0, 0, 0, 0};
 	u_int i;
 
 	*names = NULL;
 	*nnames = 0;
 
 	if (key == NULL || sshkey_is_cert(key))
 		return;
 
 	ctx.host = host;
 	ctx.ip = ip;
 	ctx.key = key;
 
 	for (i = 0; i < num_user_hostfiles; i++) {
 		if (hostkeys_find_by_key_hostfile(user_hostfiles[i],
 		    "user", &ctx) != 0)
 			goto fail;
 	}
 	for (i = 0; i < num_system_hostfiles; i++) {
 		if (hostkeys_find_by_key_hostfile(system_hostfiles[i],
 		    "system", &ctx) != 0)
 			goto fail;
 	}
 	/* success */
 	*names = ctx.names;
 	*nnames = ctx.nnames;
 	ctx.names = NULL;
 	ctx.nnames = 0;
 	return;
  fail:
 	for (i = 0; i < ctx.nnames; i++)
 		free(ctx.names[i]);
 	free(ctx.names);
 }
 
 #define MAX_OTHER_NAMES	8 /* Maximum number of names to list */
 static char *
 other_hostkeys_message(const char *host, const char *ip,
     const struct sshkey *key,
     char **user_hostfiles, u_int num_user_hostfiles,
     char **system_hostfiles, u_int num_system_hostfiles)
 {
 	char *ret = NULL, **othernames = NULL;
 	u_int i, n, num_othernames = 0;
 
 	hostkeys_find_by_key(host, ip, key,
 	    user_hostfiles, num_user_hostfiles,
 	    system_hostfiles, num_system_hostfiles,
 	    &othernames, &num_othernames);
 	if (num_othernames == 0)
 		return xstrdup("This key is not known by any other names.");
 
 	xasprintf(&ret, "This host key is known by the following other "
 	    "names/addresses:");
 
 	n = num_othernames;
 	if (n > MAX_OTHER_NAMES)
 		n = MAX_OTHER_NAMES;
 	for (i = 0; i < n; i++) {
 		xextendf(&ret, "\n", "    %s", othernames[i]);
 	}
 	if (n < num_othernames) {
 		xextendf(&ret, "\n", "    (%d additional names omitted)",
 		    num_othernames - n);
 	}
 	for (i = 0; i < num_othernames; i++)
 		free(othernames[i]);
 	free(othernames);
 	return ret;
 }
 
 void
 load_hostkeys_command(struct hostkeys *hostkeys, const char *command_template,
     const char *invocation, const struct ssh_conn_info *cinfo,
     const struct sshkey *host_key, const char *hostfile_hostname)
 {
 	int r, i, ac = 0;
 	char *key_fp = NULL, *keytext = NULL, *tmp;
 	char *command = NULL, *tag = NULL, **av = NULL;
 	FILE *f = NULL;
 	pid_t pid;
 	void (*osigchld)(int);
 
 	xasprintf(&tag, "KnownHostsCommand-%s", invocation);
 
 	if (host_key != NULL) {
 		if ((key_fp = sshkey_fingerprint(host_key,
 		    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("sshkey_fingerprint failed");
 		if ((r = sshkey_to_base64(host_key, &keytext)) != 0)
 			fatal_fr(r, "sshkey_to_base64 failed");
 	}
 	/*
 	 * NB. all returns later this function should go via "out" to
 	 * ensure the original SIGCHLD handler is restored properly.
 	 */
 	osigchld = ssh_signal(SIGCHLD, SIG_DFL);
 
 	/* Turn the command into an argument vector */
 	if (argv_split(command_template, &ac, &av, 0) != 0) {
 		error("%s \"%s\" contains invalid quotes", tag,
 		    command_template);
 		goto out;
 	}
 	if (ac == 0) {
 		error("%s \"%s\" yielded no arguments", tag,
 		    command_template);
 		goto out;
 	}
 	for (i = 1; i < ac; i++) {
 		tmp = percent_dollar_expand(av[i],
 		    DEFAULT_CLIENT_PERCENT_EXPAND_ARGS(cinfo),
 		    "H", hostfile_hostname,
 		    "I", invocation,
 		    "t", host_key == NULL ? "NONE" : sshkey_ssh_name(host_key),
 		    "f", key_fp == NULL ? "NONE" : key_fp,
 		    "K", keytext == NULL ? "NONE" : keytext,
 		    (char *)NULL);
 		if (tmp == NULL)
 			fatal_f("percent_expand failed");
 		free(av[i]);
 		av[i] = tmp;
 	}
 	/* Prepare a printable command for logs, etc. */
 	command = argv_assemble(ac, av);
 
 	if ((pid = subprocess(tag, command, ac, av, &f,
 	    SSH_SUBPROCESS_STDOUT_CAPTURE|SSH_SUBPROCESS_UNSAFE_PATH|
 	    SSH_SUBPROCESS_PRESERVE_ENV, NULL, NULL, NULL)) == 0)
 		goto out;
 
 	load_hostkeys_file(hostkeys, hostfile_hostname, tag, f, 1);
 
 	if (exited_cleanly(pid, tag, command, 0) != 0)
 		fatal("KnownHostsCommand failed");
 
  out:
 	if (f != NULL)
 		fclose(f);
 	ssh_signal(SIGCHLD, osigchld);
 	for (i = 0; i < ac; i++)
 		free(av[i]);
 	free(av);
 	free(tag);
 	free(command);
 	free(key_fp);
 	free(keytext);
 }
 
 /*
  * check whether the supplied host key is valid, return -1 if the key
  * is not valid. user_hostfile[0] will not be updated if 'readonly' is true.
  */
 #define RDRW	0
 #define RDONLY	1
 #define ROQUIET	2
 static int
 check_host_key(char *hostname, const struct ssh_conn_info *cinfo,
     struct sockaddr *hostaddr, u_short port,
     struct sshkey *host_key, int readonly, int clobber_port,
     char **user_hostfiles, u_int num_user_hostfiles,
     char **system_hostfiles, u_int num_system_hostfiles,
     const char *hostfile_command)
 {
 	HostStatus host_status = -1, ip_status = -1;
 	struct sshkey *raw_key = NULL;
 	char *ip = NULL, *host = NULL;
 	char hostline[1000], *hostp, *fp, *ra;
 	char msg[1024];
 	const char *type, *fail_reason = NULL;
 	const struct hostkey_entry *host_found = NULL, *ip_found = NULL;
 	int len, cancelled_forwarding = 0, confirmed;
 	int local = sockaddr_is_local(hostaddr);
 	int r, want_cert = sshkey_is_cert(host_key), host_ip_differ = 0;
 	int hostkey_trusted = 0; /* Known or explicitly accepted by user */
 	struct hostkeys *host_hostkeys, *ip_hostkeys;
 	u_int i;
 
 	/*
 	 * Force accepting of the host key for loopback/localhost. The
 	 * problem is that if the home directory is NFS-mounted to multiple
 	 * machines, localhost will refer to a different machine in each of
 	 * them, and the user will get bogus HOST_CHANGED warnings.  This
 	 * essentially disables host authentication for localhost; however,
 	 * this is probably not a real problem.
 	 */
 	if (options.no_host_authentication_for_localhost == 1 && local &&
 	    options.host_key_alias == NULL) {
 		debug("Forcing accepting of host key for "
 		    "loopback/localhost.");
 		options.update_hostkeys = 0;
 		return 0;
 	}
 
 	/*
 	 * Don't ever try to write an invalid name to a known hosts file.
 	 * Note: do this before get_hostfile_hostname_ipaddr() to catch
 	 * '[' or ']' in the name before they are added.
 	 */
 	if (strcspn(hostname, "@?*#[]|'\'\"\\") != strlen(hostname)) {
 		debug_f("invalid hostname \"%s\"; will not record: %s",
 		    hostname, fail_reason);
 		readonly = RDONLY;
 	}
 
 	/*
 	 * Prepare the hostname and address strings used for hostkey lookup.
 	 * In some cases, these will have a port number appended.
 	 */
 	get_hostfile_hostname_ipaddr(hostname, hostaddr,
 	    clobber_port ? 0 : port, &host, &ip);
 
 	/*
 	 * Turn off check_host_ip if the connection is to localhost, via proxy
 	 * command or if we don't have a hostname to compare with
 	 */
 	if (options.check_host_ip && (local ||
 	    strcmp(hostname, ip) == 0 || options.proxy_command != NULL))
 		options.check_host_ip = 0;
 
 	host_hostkeys = init_hostkeys();
 	for (i = 0; i < num_user_hostfiles; i++)
 		load_hostkeys(host_hostkeys, host, user_hostfiles[i], 0);
 	for (i = 0; i < num_system_hostfiles; i++)
 		load_hostkeys(host_hostkeys, host, system_hostfiles[i], 0);
 	if (hostfile_command != NULL && !clobber_port) {
 		load_hostkeys_command(host_hostkeys, hostfile_command,
 		    "HOSTNAME", cinfo, host_key, host);
 	}
 
 	ip_hostkeys = NULL;
 	if (!want_cert && options.check_host_ip) {
 		ip_hostkeys = init_hostkeys();
 		for (i = 0; i < num_user_hostfiles; i++)
 			load_hostkeys(ip_hostkeys, ip, user_hostfiles[i], 0);
 		for (i = 0; i < num_system_hostfiles; i++)
 			load_hostkeys(ip_hostkeys, ip, system_hostfiles[i], 0);
 		if (hostfile_command != NULL && !clobber_port) {
 			load_hostkeys_command(ip_hostkeys, hostfile_command,
 			    "ADDRESS", cinfo, host_key, ip);
 		}
 	}
 
  retry:
 	/* Reload these as they may have changed on cert->key downgrade */
 	want_cert = sshkey_is_cert(host_key);
 	type = sshkey_type(host_key);
 
 	/*
 	 * Check if the host key is present in the user's list of known
 	 * hosts or in the systemwide list.
 	 */
 	host_status = check_key_in_hostkeys(host_hostkeys, host_key,
 	    &host_found);
 
 	/*
 	 * If there are no hostfiles, or if the hostkey was found via
 	 * KnownHostsCommand, then don't try to touch the disk.
 	 */
 	if (!readonly && (num_user_hostfiles == 0 ||
 	    (host_found != NULL && host_found->note != 0)))
 		readonly = RDONLY;
 
 	/*
 	 * Also perform check for the ip address, skip the check if we are
 	 * localhost, looking for a certificate, or the hostname was an ip
 	 * address to begin with.
 	 */
 	if (!want_cert && ip_hostkeys != NULL) {
 		ip_status = check_key_in_hostkeys(ip_hostkeys, host_key,
 		    &ip_found);
 		if (host_status == HOST_CHANGED &&
 		    (ip_status != HOST_CHANGED ||
 		    (ip_found != NULL &&
 		    !sshkey_equal(ip_found->key, host_found->key))))
 			host_ip_differ = 1;
 	} else
 		ip_status = host_status;
 
 	switch (host_status) {
 	case HOST_OK:
 		/* The host is known and the key matches. */
 		debug("Host '%.200s' is known and matches the %s host %s.",
 		    host, type, want_cert ? "certificate" : "key");
 		debug("Found %s in %s:%lu", want_cert ? "CA key" : "key",
 		    host_found->file, host_found->line);
 		if (want_cert) {
 			if (sshkey_cert_check_host(host_key,
 			    options.host_key_alias == NULL ?
 			    hostname : options.host_key_alias, 0,
 			    options.ca_sign_algorithms, &fail_reason) != 0) {
 				error("%s", fail_reason);
 				goto fail;
 			}
 			/*
 			 * Do not attempt hostkey update if a certificate was
 			 * successfully matched.
 			 */
 			if (options.update_hostkeys != 0) {
 				options.update_hostkeys = 0;
 				debug3_f("certificate host key in use; "
 				    "disabling UpdateHostkeys");
 			}
 		}
 		/* Turn off UpdateHostkeys if key was in system known_hosts */
 		if (options.update_hostkeys != 0 &&
 		    (path_in_hostfiles(host_found->file,
 		    system_hostfiles, num_system_hostfiles) ||
 		    (ip_status == HOST_OK && ip_found != NULL &&
 		    path_in_hostfiles(ip_found->file,
 		    system_hostfiles, num_system_hostfiles)))) {
 			options.update_hostkeys = 0;
 			debug3_f("host key found in GlobalKnownHostsFile; "
 			    "disabling UpdateHostkeys");
 		}
 		if (options.update_hostkeys != 0 && host_found->note) {
 			options.update_hostkeys = 0;
 			debug3_f("host key found via KnownHostsCommand; "
 			    "disabling UpdateHostkeys");
 		}
 		if (options.check_host_ip && ip_status == HOST_NEW) {
 			if (readonly || want_cert)
 				logit("%s host key for IP address "
 				    "'%.128s' not in list of known hosts.",
 				    type, ip);
 			else if (!add_host_to_hostfile(user_hostfiles[0], ip,
 			    host_key, options.hash_known_hosts))
 				logit("Failed to add the %s host key for IP "
 				    "address '%.128s' to the list of known "
 				    "hosts (%.500s).", type, ip,
 				    user_hostfiles[0]);
 			else
 				logit("Warning: Permanently added the %s host "
 				    "key for IP address '%.128s' to the list "
 				    "of known hosts.", type, ip);
 		} else if (options.visual_host_key) {
 			fp = sshkey_fingerprint(host_key,
 			    options.fingerprint_hash, SSH_FP_DEFAULT);
 			ra = sshkey_fingerprint(host_key,
 			    options.fingerprint_hash, SSH_FP_RANDOMART);
 			if (fp == NULL || ra == NULL)
 				fatal_f("sshkey_fingerprint failed");
 			logit("Host key fingerprint is %s\n%s", fp, ra);
 			free(ra);
 			free(fp);
 		}
 		hostkey_trusted = 1;
 		break;
 	case HOST_NEW:
 		if (options.host_key_alias == NULL && port != 0 &&
 		    port != SSH_DEFAULT_PORT && !clobber_port) {
 			debug("checking without port identifier");
 			if (check_host_key(hostname, cinfo, hostaddr, 0,
 			    host_key, ROQUIET, 1,
 			    user_hostfiles, num_user_hostfiles,
 			    system_hostfiles, num_system_hostfiles,
 			    hostfile_command) == 0) {
 				debug("found matching key w/out port");
 				break;
 			}
 		}
 		if (readonly || want_cert)
 			goto fail;
 		/* The host is new. */
 		if (options.strict_host_key_checking ==
 		    SSH_STRICT_HOSTKEY_YES) {
 			/*
 			 * User has requested strict host key checking.  We
 			 * will not add the host key automatically.  The only
 			 * alternative left is to abort.
 			 */
 			error("No %s host key is known for %.200s and you "
 			    "have requested strict checking.", type, host);
 			goto fail;
 		} else if (options.strict_host_key_checking ==
 		    SSH_STRICT_HOSTKEY_ASK) {
 			char *msg1 = NULL, *msg2 = NULL;
 
 			xasprintf(&msg1, "The authenticity of host "
 			    "'%.200s (%s)' can't be established", host, ip);
 
 			if (show_other_keys(host_hostkeys, host_key)) {
 				xextendf(&msg1, "\n", "but keys of different "
 				    "type are already known for this host.");
 			} else
 				xextendf(&msg1, "", ".");
 
 			fp = sshkey_fingerprint(host_key,
 			    options.fingerprint_hash, SSH_FP_DEFAULT);
 			ra = sshkey_fingerprint(host_key,
 			    options.fingerprint_hash, SSH_FP_RANDOMART);
 			if (fp == NULL || ra == NULL)
 				fatal_f("sshkey_fingerprint failed");
 			xextendf(&msg1, "\n", "%s key fingerprint is %s.",
 			    type, fp);
 			if (options.visual_host_key)
 				xextendf(&msg1, "\n", "%s", ra);
 			if (options.verify_host_key_dns) {
 				xextendf(&msg1, "\n",
 				    "%s host key fingerprint found in DNS.",
 				    matching_host_key_dns ?
 				    "Matching" : "No matching");
 			}
 			/* msg2 informs for other names matching this key */
 			if ((msg2 = other_hostkeys_message(host, ip, host_key,
 			    user_hostfiles, num_user_hostfiles,
 			    system_hostfiles, num_system_hostfiles)) != NULL)
 				xextendf(&msg1, "\n", "%s", msg2);
 
 			xextendf(&msg1, "\n",
 			    "Are you sure you want to continue connecting "
 			    "(yes/no/[fingerprint])? ");
 
 			confirmed = confirm(msg1, fp);
 			free(ra);
 			free(fp);
 			free(msg1);
 			free(msg2);
 			if (!confirmed)
 				goto fail;
 			hostkey_trusted = 1; /* user explicitly confirmed */
 		}
 		/*
 		 * If in "new" or "off" strict mode, add the key automatically
 		 * to the local known_hosts file.
 		 */
 		if (options.check_host_ip && ip_status == HOST_NEW) {
 			snprintf(hostline, sizeof(hostline), "%s,%s", host, ip);
 			hostp = hostline;
 			if (options.hash_known_hosts) {
 				/* Add hash of host and IP separately */
 				r = add_host_to_hostfile(user_hostfiles[0],
 				    host, host_key, options.hash_known_hosts) &&
 				    add_host_to_hostfile(user_hostfiles[0], ip,
 				    host_key, options.hash_known_hosts);
 			} else {
 				/* Add unhashed "host,ip" */
 				r = add_host_to_hostfile(user_hostfiles[0],
 				    hostline, host_key,
 				    options.hash_known_hosts);
 			}
 		} else {
 			r = add_host_to_hostfile(user_hostfiles[0], host,
 			    host_key, options.hash_known_hosts);
 			hostp = host;
 		}
 
 		if (!r)
 			logit("Failed to add the host to the list of known "
 			    "hosts (%.500s).", user_hostfiles[0]);
 		else
 			logit("Warning: Permanently added '%.200s' (%s) to the "
 			    "list of known hosts.", hostp, type);
 		break;
 	case HOST_REVOKED:
 		error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 		error("@       WARNING: REVOKED HOST KEY DETECTED!               @");
 		error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 		error("The %s host key for %s is marked as revoked.", type, host);
 		error("This could mean that a stolen key is being used to");
 		error("impersonate this host.");
 
 		/*
 		 * If strict host key checking is in use, the user will have
 		 * to edit the key manually and we can only abort.
 		 */
 		if (options.strict_host_key_checking !=
 		    SSH_STRICT_HOSTKEY_OFF) {
 			error("%s host key for %.200s was revoked and you have "
 			    "requested strict checking.", type, host);
 			goto fail;
 		}
 		goto continue_unsafe;
 
 	case HOST_CHANGED:
 		if (want_cert) {
 			/*
 			 * This is only a debug() since it is valid to have
 			 * CAs with wildcard DNS matches that don't match
 			 * all hosts that one might visit.
 			 */
 			debug("Host certificate authority does not "
 			    "match %s in %s:%lu", CA_MARKER,
 			    host_found->file, host_found->line);
 			goto fail;
 		}
 		if (readonly == ROQUIET)
 			goto fail;
 		if (options.check_host_ip && host_ip_differ) {
 			char *key_msg;
 			if (ip_status == HOST_NEW)
 				key_msg = "is unknown";
 			else if (ip_status == HOST_OK)
 				key_msg = "is unchanged";
 			else
 				key_msg = "has a different value";
 			error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 			error("@       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @");
 			error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 			error("The %s host key for %s has changed,", type, host);
 			error("and the key for the corresponding IP address %s", ip);
 			error("%s. This could either mean that", key_msg);
 			error("DNS SPOOFING is happening or the IP address for the host");
 			error("and its host key have changed at the same time.");
 			if (ip_status != HOST_NEW)
 				error("Offending key for IP in %s:%lu",
 				    ip_found->file, ip_found->line);
 		}
 		/* The host key has changed. */
 		warn_changed_key(host_key);
 		if (num_user_hostfiles > 0 || num_system_hostfiles > 0) {
 			error("Add correct host key in %.100s to get rid "
 			    "of this message.", num_user_hostfiles > 0 ?
 			    user_hostfiles[0] : system_hostfiles[0]);
 		}
 		error("Offending %s key in %s:%lu",
 		    sshkey_type(host_found->key),
 		    host_found->file, host_found->line);
 
 		/*
 		 * If strict host key checking is in use, the user will have
 		 * to edit the key manually and we can only abort.
 		 */
 		if (options.strict_host_key_checking !=
 		    SSH_STRICT_HOSTKEY_OFF) {
 			error("Host key for %.200s has changed and you have "
 			    "requested strict checking.", host);
 			goto fail;
 		}
 
  continue_unsafe:
 		/*
 		 * If strict host key checking has not been requested, allow
 		 * the connection but without MITM-able authentication or
 		 * forwarding.
 		 */
 		if (options.password_authentication) {
 			error("Password authentication is disabled to avoid "
 			    "man-in-the-middle attacks.");
 			options.password_authentication = 0;
 			cancelled_forwarding = 1;
 		}
 		if (options.kbd_interactive_authentication) {
 			error("Keyboard-interactive authentication is disabled"
 			    " to avoid man-in-the-middle attacks.");
 			options.kbd_interactive_authentication = 0;
 			cancelled_forwarding = 1;
 		}
 		if (options.forward_agent) {
 			error("Agent forwarding is disabled to avoid "
 			    "man-in-the-middle attacks.");
 			options.forward_agent = 0;
 			cancelled_forwarding = 1;
 		}
 		if (options.forward_x11) {
 			error("X11 forwarding is disabled to avoid "
 			    "man-in-the-middle attacks.");
 			options.forward_x11 = 0;
 			cancelled_forwarding = 1;
 		}
 		if (options.num_local_forwards > 0 ||
 		    options.num_remote_forwards > 0) {
 			error("Port forwarding is disabled to avoid "
 			    "man-in-the-middle attacks.");
 			options.num_local_forwards =
 			    options.num_remote_forwards = 0;
 			cancelled_forwarding = 1;
 		}
 		if (options.tun_open != SSH_TUNMODE_NO) {
 			error("Tunnel forwarding is disabled to avoid "
 			    "man-in-the-middle attacks.");
 			options.tun_open = SSH_TUNMODE_NO;
 			cancelled_forwarding = 1;
 		}
 		if (options.update_hostkeys != 0) {
 			error("UpdateHostkeys is disabled because the host "
 			    "key is not trusted.");
 			options.update_hostkeys = 0;
 		}
 		if (options.exit_on_forward_failure && cancelled_forwarding)
 			fatal("Error: forwarding disabled due to host key "
 			    "check failure");
 
 		/*
 		 * XXX Should permit the user to change to use the new id.
 		 * This could be done by converting the host key to an
 		 * identifying sentence, tell that the host identifies itself
 		 * by that sentence, and ask the user if they wish to
 		 * accept the authentication.
 		 */
 		break;
 	case HOST_FOUND:
 		fatal("internal error");
 		break;
 	}
 
 	if (options.check_host_ip && host_status != HOST_CHANGED &&
 	    ip_status == HOST_CHANGED) {
 		snprintf(msg, sizeof(msg),
 		    "Warning: the %s host key for '%.200s' "
 		    "differs from the key for the IP address '%.128s'"
 		    "\nOffending key for IP in %s:%lu",
 		    type, host, ip, ip_found->file, ip_found->line);
 		if (host_status == HOST_OK) {
 			len = strlen(msg);
 			snprintf(msg + len, sizeof(msg) - len,
 			    "\nMatching host key in %s:%lu",
 			    host_found->file, host_found->line);
 		}
 		if (options.strict_host_key_checking ==
 		    SSH_STRICT_HOSTKEY_ASK) {
 			strlcat(msg, "\nAre you sure you want "
 			    "to continue connecting (yes/no)? ", sizeof(msg));
 			if (!confirm(msg, NULL))
 				goto fail;
 		} else if (options.strict_host_key_checking !=
 		    SSH_STRICT_HOSTKEY_OFF) {
 			logit("%s", msg);
 			error("Exiting, you have requested strict checking.");
 			goto fail;
 		} else {
 			logit("%s", msg);
 		}
 	}
 
 	if (!hostkey_trusted && options.update_hostkeys) {
 		debug_f("hostkey not known or explicitly trusted: "
 		    "disabling UpdateHostkeys");
 		options.update_hostkeys = 0;
 	}
 
 	free(ip);
 	free(host);
 	if (host_hostkeys != NULL)
 		free_hostkeys(host_hostkeys);
 	if (ip_hostkeys != NULL)
 		free_hostkeys(ip_hostkeys);
 	return 0;
 
 fail:
 	if (want_cert && host_status != HOST_REVOKED) {
 		/*
 		 * No matching certificate. Downgrade cert to raw key and
 		 * search normally.
 		 */
 		debug("No matching CA found. Retry with plain key");
 		if ((r = sshkey_from_private(host_key, &raw_key)) != 0)
 			fatal_fr(r, "decode key");
 		if ((r = sshkey_drop_cert(raw_key)) != 0)
 			fatal_r(r, "Couldn't drop certificate");
 		host_key = raw_key;
 		goto retry;
 	}
 	sshkey_free(raw_key);
 	free(ip);
 	free(host);
 	if (host_hostkeys != NULL)
 		free_hostkeys(host_hostkeys);
 	if (ip_hostkeys != NULL)
 		free_hostkeys(ip_hostkeys);
 	return -1;
 }
 
 /* returns 0 if key verifies or -1 if key does NOT verify */
 int
 verify_host_key(char *host, struct sockaddr *hostaddr, struct sshkey *host_key,
     const struct ssh_conn_info *cinfo)
 {
 	u_int i;
 	int r = -1, flags = 0;
 	char valid[64], *fp = NULL, *cafp = NULL;
 	struct sshkey *plain = NULL;
 
 	if ((fp = sshkey_fingerprint(host_key,
 	    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) {
 		error_fr(r, "fingerprint host key");
 		r = -1;
 		goto out;
 	}
 
 	if (sshkey_is_cert(host_key)) {
 		if ((cafp = sshkey_fingerprint(host_key->cert->signature_key,
 		    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) {
 			error_fr(r, "fingerprint CA key");
 			r = -1;
 			goto out;
 		}
 		sshkey_format_cert_validity(host_key->cert,
 		    valid, sizeof(valid));
 		debug("Server host certificate: %s %s, serial %llu "
 		    "ID \"%s\" CA %s %s valid %s",
 		    sshkey_ssh_name(host_key), fp,
 		    (unsigned long long)host_key->cert->serial,
 		    host_key->cert->key_id,
 		    sshkey_ssh_name(host_key->cert->signature_key), cafp,
 		    valid);
 		for (i = 0; i < host_key->cert->nprincipals; i++) {
 			debug2("Server host certificate hostname: %s",
 			    host_key->cert->principals[i]);
 		}
 	} else {
 		debug("Server host key: %s %s", sshkey_ssh_name(host_key), fp);
 	}
 
 	if (sshkey_equal(previous_host_key, host_key)) {
 		debug2_f("server host key %s %s matches cached key",
 		    sshkey_type(host_key), fp);
 		r = 0;
 		goto out;
 	}
 
 	/* Check in RevokedHostKeys file if specified */
 	if (options.revoked_host_keys != NULL) {
 		r = sshkey_check_revoked(host_key, options.revoked_host_keys);
 		switch (r) {
 		case 0:
 			break; /* not revoked */
 		case SSH_ERR_KEY_REVOKED:
 			error("Host key %s %s revoked by file %s",
 			    sshkey_type(host_key), fp,
 			    options.revoked_host_keys);
 			r = -1;
 			goto out;
 		default:
 			error_r(r, "Error checking host key %s %s in "
 			    "revoked keys file %s", sshkey_type(host_key),
 			    fp, options.revoked_host_keys);
 			r = -1;
 			goto out;
 		}
 	}
 
 	if (options.verify_host_key_dns) {
 		/*
 		 * XXX certs are not yet supported for DNS, so downgrade
 		 * them and try the plain key.
 		 */
 		if ((r = sshkey_from_private(host_key, &plain)) != 0)
 			goto out;
 		if (sshkey_is_cert(plain))
 			sshkey_drop_cert(plain);
 		if (verify_host_key_dns(host, hostaddr, plain, &flags) == 0) {
 			if (flags & DNS_VERIFY_FOUND) {
 				if (options.verify_host_key_dns == 1 &&
 				    flags & DNS_VERIFY_MATCH &&
 				    flags & DNS_VERIFY_SECURE) {
 					r = 0;
 					goto out;
 				}
 				if (flags & DNS_VERIFY_MATCH) {
 					matching_host_key_dns = 1;
 				} else {
 					warn_changed_key(plain);
 					error("Update the SSHFP RR in DNS "
 					    "with the new host key to get rid "
 					    "of this message.");
 				}
 			}
 		}
 	}
 	r = check_host_key(host, cinfo, hostaddr, options.port, host_key,
 	    RDRW, 0, options.user_hostfiles, options.num_user_hostfiles,
 	    options.system_hostfiles, options.num_system_hostfiles,
 	    options.known_hosts_command);
 
 out:
 	sshkey_free(plain);
 	free(fp);
 	free(cafp);
 	if (r == 0 && host_key != NULL) {
 		sshkey_free(previous_host_key);
 		r = sshkey_from_private(host_key, &previous_host_key);
 	}
 
 	return r;
 }
 
 /*
  * Starts a dialog with the server, and authenticates the current user on the
  * server.  This does not need any extra privileges.  The basic connection
  * to the server must already have been established before this is called.
  * If login fails, this function prints an error and never returns.
  * This function does not require super-user privileges.
  */
 void
 ssh_login(struct ssh *ssh, Sensitive *sensitive, const char *orighost,
     struct sockaddr *hostaddr, u_short port, struct passwd *pw, int timeout_ms,
     const struct ssh_conn_info *cinfo)
 {
 	char *host;
 	char *server_user, *local_user;
 	int r;
 
 	local_user = xstrdup(pw->pw_name);
 	server_user = options.user ? options.user : local_user;
 
 	/* Convert the user-supplied hostname into all lowercase. */
 	host = xstrdup(orighost);
 	lowercase(host);
 
 	/* Exchange protocol version identification strings with the server. */
 	if ((r = kex_exchange_identification(ssh, timeout_ms, NULL)) != 0)
 		sshpkt_fatal(ssh, r, "banner exchange");
 
 	/* Put the connection into non-blocking mode. */
 	ssh_packet_set_nonblocking(ssh);
 
 	/* key exchange */
 	/* authenticate user */
 	debug("Authenticating to %s:%d as '%s'", host, port, server_user);
 	ssh_kex2(ssh, host, hostaddr, port, cinfo);
 	ssh_userauth2(ssh, local_user, server_user, host, sensitive);
 	free(local_user);
 	free(host);
 }
 
 /* print all known host keys for a given host, but skip keys of given type */
 static int
 show_other_keys(struct hostkeys *hostkeys, struct sshkey *key)
 {
 	int type[] = {
 		KEY_RSA,
+#ifdef WITH_DSA
 		KEY_DSA,
+#endif
 		KEY_ECDSA,
 		KEY_ED25519,
 		KEY_XMSS,
 		-1
 	};
 	int i, ret = 0;
 	char *fp, *ra;
 	const struct hostkey_entry *found;
 
 	for (i = 0; type[i] != -1; i++) {
 		if (type[i] == key->type)
 			continue;
 		if (!lookup_key_in_hostkeys_by_type(hostkeys, type[i],
 		    -1, &found))
 			continue;
 		fp = sshkey_fingerprint(found->key,
 		    options.fingerprint_hash, SSH_FP_DEFAULT);
 		ra = sshkey_fingerprint(found->key,
 		    options.fingerprint_hash, SSH_FP_RANDOMART);
 		if (fp == NULL || ra == NULL)
 			fatal_f("sshkey_fingerprint fail");
 		logit("WARNING: %s key found for host %s\n"
 		    "in %s:%lu\n"
 		    "%s key fingerprint %s.",
 		    sshkey_type(found->key),
 		    found->host, found->file, found->line,
 		    sshkey_type(found->key), fp);
 		if (options.visual_host_key)
 			logit("%s", ra);
 		free(ra);
 		free(fp);
 		ret = 1;
 	}
 	return ret;
 }
 
 static void
 warn_changed_key(struct sshkey *host_key)
 {
 	char *fp;
 
 	fp = sshkey_fingerprint(host_key, options.fingerprint_hash,
 	    SSH_FP_DEFAULT);
 	if (fp == NULL)
 		fatal_f("sshkey_fingerprint fail");
 
 	error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 	error("@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @");
 	error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
 	error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!");
 	error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!");
 	error("It is also possible that a host key has just been changed.");
 	error("The fingerprint for the %s key sent by the remote host is\n%s.",
 	    sshkey_type(host_key), fp);
 	error("Please contact your system administrator.");
 
 	free(fp);
 }
 
 /*
  * Execute a local command
  */
 int
 ssh_local_cmd(const char *args)
 {
 	char *shell;
 	pid_t pid;
 	int status;
 	void (*osighand)(int);
 
 	if (!options.permit_local_command ||
 	    args == NULL || !*args)
 		return (1);
 
 	if ((shell = getenv("SHELL")) == NULL || *shell == '\0')
 		shell = _PATH_BSHELL;
 
 	osighand = ssh_signal(SIGCHLD, SIG_DFL);
 	pid = fork();
 	if (pid == 0) {
 		ssh_signal(SIGPIPE, SIG_DFL);
 		debug3("Executing %s -c \"%s\"", shell, args);
 		execl(shell, shell, "-c", args, (char *)NULL);
 		error("Couldn't execute %s -c \"%s\": %s",
 		    shell, args, strerror(errno));
 		_exit(1);
 	} else if (pid == -1)
 		fatal("fork failed: %.100s", strerror(errno));
 	while (waitpid(pid, &status, 0) == -1)
 		if (errno != EINTR)
 			fatal("Couldn't wait for child: %s", strerror(errno));
 	ssh_signal(SIGCHLD, osighand);
 
 	if (!WIFEXITED(status))
 		return (1);
 
 	return (WEXITSTATUS(status));
 }
 
 void
 maybe_add_key_to_agent(const char *authfile, struct sshkey *private,
     const char *comment, const char *passphrase)
 {
 	int auth_sock = -1, r;
 	const char *skprovider = NULL;
 
 	if (options.add_keys_to_agent == 0)
 		return;
 
 	if ((r = ssh_get_authentication_socket(&auth_sock)) != 0) {
 		debug3("no authentication agent, not adding key");
 		return;
 	}
 
 	if (options.add_keys_to_agent == 2 &&
 	    !ask_permission("Add key %s (%s) to agent?", authfile, comment)) {
 		debug3("user denied adding this key");
 		close(auth_sock);
 		return;
 	}
 	if (sshkey_is_sk(private))
 		skprovider = options.sk_provider;
 	if ((r = ssh_add_identity_constrained(auth_sock, private,
 	    comment == NULL ? authfile : comment,
 	    options.add_keys_to_agent_lifespan,
 	    (options.add_keys_to_agent == 3), 0, skprovider, NULL, 0)) == 0)
 		debug("identity added to agent: %s", authfile);
 	else
 		debug("could not add identity to agent: %s (%d)", authfile, r);
 	close(auth_sock);
 }
diff --git a/sshconnect2.c b/sshconnect2.c
index fab1e36bea03..745c2a0517f3 100644
--- a/sshconnect2.c
+++ b/sshconnect2.c
@@ -1,2374 +1,2365 @@
-/* $OpenBSD: sshconnect2.c,v 1.371 2023/12/18 14:45:49 djm Exp $ */
+/* $OpenBSD: sshconnect2.c,v 1.372 2024/01/08 00:34:34 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2008 Damien Miller.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <netdb.h>
 #include <pwd.h>
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdarg.h>
 #include <unistd.h>
 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
 #include <vis.h>
 #endif
 
 #include "openbsd-compat/sys-queue.h"
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "sshbuf.h"
 #include "packet.h"
 #include "compat.h"
 #include "cipher.h"
 #include "sshkey.h"
 #include "kex.h"
 #include "sshconnect.h"
 #include "authfile.h"
 #include "dh.h"
 #include "authfd.h"
 #include "log.h"
 #include "misc.h"
 #include "readconf.h"
 #include "match.h"
 #include "dispatch.h"
 #include "canohost.h"
 #include "msg.h"
 #include "pathnames.h"
 #include "uidswap.h"
 #include "hostfile.h"
 #include "ssherr.h"
 #include "utf8.h"
 #include "ssh-sk.h"
 #include "sk-api.h"
 
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 
 /* import */
 extern char *client_version_string;
 extern char *server_version_string;
 extern Options options;
 
 /*
  * SSH2 key exchange
  */
 
 static char *xxx_host;
 static struct sockaddr *xxx_hostaddr;
 static const struct ssh_conn_info *xxx_conn_info;
 
 static int
 verify_host_key_callback(struct sshkey *hostkey, struct ssh *ssh)
 {
 	int r;
 
 	if ((r = sshkey_check_rsa_length(hostkey,
 	    options.required_rsa_size)) != 0)
 		fatal_r(r, "Bad server host key");
 	if (verify_host_key(xxx_host, xxx_hostaddr, hostkey,
 	    xxx_conn_info) == -1)
 		fatal("Host key verification failed.");
 	return 0;
 }
 
 /* Returns the first item from a comma-separated algorithm list */
 static char *
 first_alg(const char *algs)
 {
 	char *ret, *cp;
 
 	ret = xstrdup(algs);
 	if ((cp = strchr(ret, ',')) != NULL)
 		*cp = '\0';
 	return ret;
 }
 
 static char *
 order_hostkeyalgs(char *host, struct sockaddr *hostaddr, u_short port,
     const struct ssh_conn_info *cinfo)
 {
 	char *oavail = NULL, *avail = NULL, *first = NULL, *last = NULL;
 	char *alg = NULL, *hostname = NULL, *ret = NULL, *best = NULL;
 	size_t maxlen;
 	struct hostkeys *hostkeys = NULL;
 	int ktype;
 	u_int i;
 
 	/* Find all hostkeys for this hostname */
 	get_hostfile_hostname_ipaddr(host, hostaddr, port, &hostname, NULL);
 	hostkeys = init_hostkeys();
 	for (i = 0; i < options.num_user_hostfiles; i++)
 		load_hostkeys(hostkeys, hostname, options.user_hostfiles[i], 0);
 	for (i = 0; i < options.num_system_hostfiles; i++) {
 		load_hostkeys(hostkeys, hostname,
 		    options.system_hostfiles[i], 0);
 	}
 	if (options.known_hosts_command != NULL) {
 		load_hostkeys_command(hostkeys, options.known_hosts_command,
 		    "ORDER", cinfo, NULL, hostname);
 	}
 	/*
 	 * If a plain public key exists that matches the type of the best
 	 * preference HostkeyAlgorithms, then use the whole list as is.
 	 * Note that we ignore whether the best preference algorithm is a
 	 * certificate type, as sshconnect.c will downgrade certs to
 	 * plain keys if necessary.
 	 */
 	best = first_alg(options.hostkeyalgorithms);
 	if (lookup_key_in_hostkeys_by_type(hostkeys,
 	    sshkey_type_plain(sshkey_type_from_name(best)),
 	    sshkey_ecdsa_nid_from_name(best), NULL)) {
 		debug3_f("have matching best-preference key type %s, "
 		    "using HostkeyAlgorithms verbatim", best);
 		ret = xstrdup(options.hostkeyalgorithms);
 		goto out;
 	}
 
 	/*
 	 * Otherwise, prefer the host key algorithms that match known keys
 	 * while keeping the ordering of HostkeyAlgorithms as much as possible.
 	 */
 	oavail = avail = xstrdup(options.hostkeyalgorithms);
 	maxlen = strlen(avail) + 1;
 	first = xmalloc(maxlen);
 	last = xmalloc(maxlen);
 	*first = *last = '\0';
 
 #define ALG_APPEND(to, from) \
 	do { \
 		if (*to != '\0') \
 			strlcat(to, ",", maxlen); \
 		strlcat(to, from, maxlen); \
 	} while (0)
 
 	while ((alg = strsep(&avail, ",")) && *alg != '\0') {
 		if ((ktype = sshkey_type_from_name(alg)) == KEY_UNSPEC)
 			fatal_f("unknown alg %s", alg);
 		/*
 		 * If we have a @cert-authority marker in known_hosts then
 		 * prefer all certificate algorithms.
 		 */
 		if (sshkey_type_is_cert(ktype) &&
 		    lookup_marker_in_hostkeys(hostkeys, MRK_CA)) {
 			ALG_APPEND(first, alg);
 			continue;
 		}
 		/* If the key appears in known_hosts then prefer it */
 		if (lookup_key_in_hostkeys_by_type(hostkeys,
 		    sshkey_type_plain(ktype),
 		    sshkey_ecdsa_nid_from_name(alg), NULL)) {
 			ALG_APPEND(first, alg);
 			continue;
 		}
 		/* Otherwise, put it last */
 		ALG_APPEND(last, alg);
 	}
 #undef ALG_APPEND
 	xasprintf(&ret, "%s%s%s", first,
 	    (*first == '\0' || *last == '\0') ? "" : ",", last);
 	if (*first != '\0')
 		debug3_f("prefer hostkeyalgs: %s", first);
 	else
 		debug3_f("no algorithms matched; accept original");
  out:
 	free(best);
 	free(first);
 	free(last);
 	free(hostname);
 	free(oavail);
 	free_hostkeys(hostkeys);
 
 	return ret;
 }
 
 void
 ssh_kex2(struct ssh *ssh, char *host, struct sockaddr *hostaddr, u_short port,
     const struct ssh_conn_info *cinfo)
 {
 	char *myproposal[PROPOSAL_MAX];
-	char *s, *all_key, *hkalgs = NULL;
+	char *all_key, *hkalgs = NULL;
 	int r, use_known_hosts_order = 0;
 
 	xxx_host = host;
 	xxx_hostaddr = hostaddr;
 	xxx_conn_info = cinfo;
 
 	if (options.rekey_limit || options.rekey_interval)
 		ssh_packet_set_rekey_limits(ssh, options.rekey_limit,
 		    options.rekey_interval);
 
 	/*
 	 * If the user has not specified HostkeyAlgorithms, or has only
 	 * appended or removed algorithms from that list then prefer algorithms
 	 * that are in the list that are supported by known_hosts keys.
 	 */
 	if (options.hostkeyalgorithms == NULL ||
 	    options.hostkeyalgorithms[0] == '-' ||
 	    options.hostkeyalgorithms[0] == '+')
 		use_known_hosts_order = 1;
 
 	/* Expand or fill in HostkeyAlgorithms */
 	all_key = sshkey_alg_list(0, 0, 1, ',');
 	if ((r = kex_assemble_names(&options.hostkeyalgorithms,
 	    kex_default_pk_alg(), all_key)) != 0)
 		fatal_fr(r, "kex_assemble_namelist");
 	free(all_key);
 
-	if ((s = kex_names_cat(options.kex_algorithms, "ext-info-c")) == NULL)
-		fatal_f("kex_names_cat");
-
 	if (use_known_hosts_order)
 		hkalgs = order_hostkeyalgs(host, hostaddr, port, cinfo);
 
-	kex_proposal_populate_entries(ssh, myproposal, s, options.ciphers,
-	    options.macs, compression_alg_list(options.compression),
+	kex_proposal_populate_entries(ssh, myproposal,
+	    options.kex_algorithms, options.ciphers, options.macs,
+	    compression_alg_list(options.compression),
 	    hkalgs ? hkalgs : options.hostkeyalgorithms);
 
 	free(hkalgs);
 
 	/* start key exchange */
 	if ((r = kex_setup(ssh, myproposal)) != 0)
 		fatal_r(r, "kex_setup");
 #ifdef WITH_OPENSSL
 	ssh->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_client;
 	ssh->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_client;
 	ssh->kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_client;
 	ssh->kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_client;
 	ssh->kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_client;
 	ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
 	ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
 # ifdef OPENSSL_HAS_ECC
 	ssh->kex->kex[KEX_ECDH_SHA2] = kex_gen_client;
 # endif
 #endif
 	ssh->kex->kex[KEX_C25519_SHA256] = kex_gen_client;
 	ssh->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_client;
 	ssh->kex->verify_host_key=&verify_host_key_callback;
 
 	ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &ssh->kex->done);
-
-	/* remove ext-info from the KEX proposals for rekeying */
-	free(myproposal[PROPOSAL_KEX_ALGS]);
-	myproposal[PROPOSAL_KEX_ALGS] =
-	    compat_kex_proposal(ssh, options.kex_algorithms);
-	if ((r = kex_prop2buf(ssh->kex->my, myproposal)) != 0)
-		fatal_r(r, "kex_prop2buf");
+	kex_proposal_free_entries(myproposal);
 
 #ifdef DEBUG_KEXDH
 	/* send 1st encrypted/maced/compressed message */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "markus")) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0 ||
 	    (r = ssh_packet_write_wait(ssh)) != 0)
 		fatal_fr(r, "send packet");
 #endif
-	kex_proposal_free_entries(myproposal);
 }
 
 /*
  * Authenticate user
  */
 
 typedef struct cauthctxt Authctxt;
 typedef struct cauthmethod Authmethod;
 typedef struct identity Identity;
 typedef struct idlist Idlist;
 
 struct identity {
 	TAILQ_ENTRY(identity) next;
 	int	agent_fd;		/* >=0 if agent supports key */
 	struct sshkey	*key;		/* public/private key */
 	char	*filename;		/* comment for agent-only keys */
 	int	tried;
 	int	isprivate;		/* key points to the private key */
 	int	userprovided;
 };
 TAILQ_HEAD(idlist, identity);
 
 struct cauthctxt {
 	const char *server_user;
 	const char *local_user;
 	const char *host;
 	const char *service;
 	struct cauthmethod *method;
 	sig_atomic_t success;
 	char *authlist;
 #ifdef GSSAPI
 	/* gssapi */
 	gss_OID_set gss_supported_mechs;
 	u_int mech_tried;
 #endif
 	/* pubkey */
 	struct idlist keys;
 	int agent_fd;
 	/* hostbased */
 	Sensitive *sensitive;
 	char *oktypes, *ktypes;
 	const char *active_ktype;
 	/* kbd-interactive */
 	int info_req_seen;
 	int attempt_kbdint;
 	/* password */
 	int attempt_passwd;
 	/* generic */
 	void *methoddata;
 };
 
 struct cauthmethod {
 	char	*name;		/* string to compare against server's list */
 	int	(*userauth)(struct ssh *ssh);
 	void	(*cleanup)(struct ssh *ssh);
 	int	*enabled;	/* flag in option struct that enables method */
 	int	*batch_flag;	/* flag in option struct that disables method */
 };
 
 static int input_userauth_service_accept(int, u_int32_t, struct ssh *);
 static int input_userauth_success(int, u_int32_t, struct ssh *);
 static int input_userauth_failure(int, u_int32_t, struct ssh *);
 static int input_userauth_banner(int, u_int32_t, struct ssh *);
 static int input_userauth_error(int, u_int32_t, struct ssh *);
 static int input_userauth_info_req(int, u_int32_t, struct ssh *);
 static int input_userauth_pk_ok(int, u_int32_t, struct ssh *);
 static int input_userauth_passwd_changereq(int, u_int32_t, struct ssh *);
 
 static int userauth_none(struct ssh *);
 static int userauth_pubkey(struct ssh *);
 static int userauth_passwd(struct ssh *);
 static int userauth_kbdint(struct ssh *);
 static int userauth_hostbased(struct ssh *);
 
 #ifdef GSSAPI
 static int userauth_gssapi(struct ssh *);
 static void userauth_gssapi_cleanup(struct ssh *);
 static int input_gssapi_response(int type, u_int32_t, struct ssh *);
 static int input_gssapi_token(int type, u_int32_t, struct ssh *);
 static int input_gssapi_error(int, u_int32_t, struct ssh *);
 static int input_gssapi_errtok(int, u_int32_t, struct ssh *);
 #endif
 
 void	userauth(struct ssh *, char *);
 
 static void pubkey_cleanup(struct ssh *);
 static int sign_and_send_pubkey(struct ssh *ssh, Identity *);
 static void pubkey_prepare(struct ssh *, Authctxt *);
 static void pubkey_reset(Authctxt *);
 static struct sshkey *load_identity_file(Identity *);
 
 static Authmethod *authmethod_get(char *authlist);
 static Authmethod *authmethod_lookup(const char *name);
 static char *authmethods_get(void);
 
 Authmethod authmethods[] = {
 #ifdef GSSAPI
 	{"gssapi-with-mic",
 		userauth_gssapi,
 		userauth_gssapi_cleanup,
 		&options.gss_authentication,
 		NULL},
 #endif
 	{"hostbased",
 		userauth_hostbased,
 		NULL,
 		&options.hostbased_authentication,
 		NULL},
 	{"publickey",
 		userauth_pubkey,
 		NULL,
 		&options.pubkey_authentication,
 		NULL},
 	{"keyboard-interactive",
 		userauth_kbdint,
 		NULL,
 		&options.kbd_interactive_authentication,
 		&options.batch_mode},
 	{"password",
 		userauth_passwd,
 		NULL,
 		&options.password_authentication,
 		&options.batch_mode},
 	{"none",
 		userauth_none,
 		NULL,
 		NULL,
 		NULL},
 	{NULL, NULL, NULL, NULL, NULL}
 };
 
 void
 ssh_userauth2(struct ssh *ssh, const char *local_user,
     const char *server_user, char *host, Sensitive *sensitive)
 {
 	Authctxt authctxt;
 	int r;
 
 	if (options.preferred_authentications == NULL)
 		options.preferred_authentications = authmethods_get();
 
 	/* setup authentication context */
 	memset(&authctxt, 0, sizeof(authctxt));
 	authctxt.server_user = server_user;
 	authctxt.local_user = local_user;
 	authctxt.host = host;
 	authctxt.service = "ssh-connection";		/* service name */
 	authctxt.success = 0;
 	authctxt.method = authmethod_lookup("none");
 	authctxt.authlist = NULL;
 	authctxt.methoddata = NULL;
 	authctxt.sensitive = sensitive;
 	authctxt.active_ktype = authctxt.oktypes = authctxt.ktypes = NULL;
 	authctxt.info_req_seen = 0;
 	authctxt.attempt_kbdint = 0;
 	authctxt.attempt_passwd = 0;
 #if GSSAPI
 	authctxt.gss_supported_mechs = NULL;
 	authctxt.mech_tried = 0;
 #endif
 	authctxt.agent_fd = -1;
 	if (authctxt.method == NULL)
 		fatal_f("internal error: cannot send userauth none request");
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_SERVICE_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "ssh-userauth")) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 
 	ssh->authctxt = &authctxt;
 	ssh_dispatch_init(ssh, &input_userauth_error);
 	ssh_dispatch_set(ssh, SSH2_MSG_EXT_INFO, kex_input_ext_info);
 	ssh_dispatch_set(ssh, SSH2_MSG_SERVICE_ACCEPT, &input_userauth_service_accept);
 	ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &authctxt.success);	/* loop until success */
 	pubkey_cleanup(ssh);
 #ifdef GSSAPI
 	if (authctxt.gss_supported_mechs != NULL) {
 		u_int ms;
 
 		gss_release_oid_set(&ms, &authctxt.gss_supported_mechs);
 		authctxt.gss_supported_mechs = NULL;
 	}
 #endif
 	ssh->authctxt = NULL;
 
 	ssh_dispatch_range(ssh, SSH2_MSG_USERAUTH_MIN, SSH2_MSG_USERAUTH_MAX, NULL);
 
 	if (!authctxt.success)
 		fatal("Authentication failed.");
 	if (ssh_packet_connection_is_on_socket(ssh)) {
 		verbose("Authenticated to %s ([%s]:%d) using \"%s\".", host,
 		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
 		    authctxt.method->name);
 	} else {
 		verbose("Authenticated to %s (via proxy) using \"%s\".", host,
 		    authctxt.method->name);
 	}
 }
 
 static int
 input_userauth_service_accept(int type, u_int32_t seq, struct ssh *ssh)
 {
 	int r;
 
 	if (ssh_packet_remaining(ssh) > 0) {
 		char *reply;
 
 		if ((r = sshpkt_get_cstring(ssh, &reply, NULL)) != 0)
 			goto out;
 		debug2("service_accept: %s", reply);
 		free(reply);
 	} else {
 		debug2("buggy server: service_accept w/o service");
 	}
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		goto out;
 	debug("SSH2_MSG_SERVICE_ACCEPT received");
 
 	/* initial userauth request */
 	userauth_none(ssh);
 
 	/* accept EXT_INFO at any time during userauth */
 	ssh_dispatch_set(ssh, SSH2_MSG_EXT_INFO, ssh->kex->ext_info_s ?
 	    &kex_input_ext_info : &input_userauth_error);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_SUCCESS, &input_userauth_success);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_FAILURE, &input_userauth_failure);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_BANNER, &input_userauth_banner);
 	r = 0;
  out:
 	return r;
 }
 
 void
 userauth(struct ssh *ssh, char *authlist)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 
 	if (authctxt->method != NULL && authctxt->method->cleanup != NULL)
 		authctxt->method->cleanup(ssh);
 
 	free(authctxt->methoddata);
 	authctxt->methoddata = NULL;
 	if (authlist == NULL) {
 		authlist = authctxt->authlist;
 	} else {
 		free(authctxt->authlist);
 		authctxt->authlist = authlist;
 	}
 	for (;;) {
 		Authmethod *method = authmethod_get(authlist);
 		if (method == NULL)
 			fatal("%s@%s: Permission denied (%s).",
 			    authctxt->server_user, authctxt->host, authlist);
 		authctxt->method = method;
 
 		/* reset the per method handler */
 		ssh_dispatch_range(ssh, SSH2_MSG_USERAUTH_PER_METHOD_MIN,
 		    SSH2_MSG_USERAUTH_PER_METHOD_MAX, NULL);
 
 		/* and try new method */
 		if (method->userauth(ssh) != 0) {
 			debug2("we sent a %s packet, wait for reply", method->name);
 			break;
 		} else {
 			debug2("we did not send a packet, disable method");
 			method->enabled = NULL;
 		}
 	}
 }
 
 static int
 input_userauth_error(int type, u_int32_t seq, struct ssh *ssh)
 {
 	fatal_f("bad message during authentication: type %d", type);
 	return 0;
 }
 
 static int
 input_userauth_banner(int type, u_int32_t seq, struct ssh *ssh)
 {
 	char *msg = NULL;
 	size_t len;
 	int r;
 
 	debug3_f("entering");
 	if ((r = sshpkt_get_cstring(ssh, &msg, &len)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0)
 		goto out;
 	if (len > 0 && options.log_level >= SYSLOG_LEVEL_INFO)
 		fmprintf(stderr, "%s", msg);
 	r = 0;
  out:
 	free(msg);
 	return r;
 }
 
 static int
 input_userauth_success(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 
 	if (authctxt == NULL)
 		fatal_f("no authentication context");
 	free(authctxt->authlist);
 	authctxt->authlist = NULL;
 	if (authctxt->method != NULL && authctxt->method->cleanup != NULL)
 		authctxt->method->cleanup(ssh);
 	free(authctxt->methoddata);
 	authctxt->methoddata = NULL;
 	authctxt->success = 1;			/* break out */
 	ssh_dispatch_set(ssh, SSH2_MSG_EXT_INFO, dispatch_protocol_error);
 	return 0;
 }
 
 #if 0
 static int
 input_userauth_success_unexpected(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 
 	if (authctxt == NULL)
 		fatal_f("no authentication context");
 
 	fatal("Unexpected authentication success during %s.",
 	    authctxt->method->name);
 	return 0;
 }
 #endif
 
 static int
 input_userauth_failure(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	char *authlist = NULL;
 	u_char partial;
 
 	if (authctxt == NULL)
 		fatal("input_userauth_failure: no authentication context");
 
 	if (sshpkt_get_cstring(ssh, &authlist, NULL) != 0 ||
 	    sshpkt_get_u8(ssh, &partial) != 0 ||
 	    sshpkt_get_end(ssh) != 0)
 		goto out;
 
 	if (partial != 0) {
 		verbose("Authenticated using \"%s\" with partial success.",
 		    authctxt->method->name);
 		/* reset state */
 		pubkey_reset(authctxt);
 	}
 	debug("Authentications that can continue: %s", authlist);
 
 	userauth(ssh, authlist);
 	authlist = NULL;
  out:
 	free(authlist);
 	return 0;
 }
 
 /*
  * Format an identity for logging including filename, key type, fingerprint
  * and location (agent, etc.). Caller must free.
  */
 static char *
 format_identity(Identity *id)
 {
 	char *fp = NULL, *ret = NULL;
 	const char *note = "";
 
 	if (id->key != NULL) {
 		fp = sshkey_fingerprint(id->key, options.fingerprint_hash,
 		    SSH_FP_DEFAULT);
 	}
 	if (id->key) {
 		if ((id->key->flags & SSHKEY_FLAG_EXT) != 0)
 			note = " token";
 		else if (sshkey_is_sk(id->key))
 			note = " authenticator";
 	}
 	xasprintf(&ret, "%s %s%s%s%s%s%s",
 	    id->filename,
 	    id->key ? sshkey_type(id->key) : "", id->key ? " " : "",
 	    fp ? fp : "",
 	    id->userprovided ? " explicit" : "", note,
 	    id->agent_fd != -1 ? " agent" : "");
 	free(fp);
 	return ret;
 }
 
 static int
 input_userauth_pk_ok(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	struct sshkey *key = NULL;
 	Identity *id = NULL;
 	int pktype, found = 0, sent = 0;
 	size_t blen;
 	char *pkalg = NULL, *fp = NULL, *ident = NULL;
 	u_char *pkblob = NULL;
 	int r;
 
 	if (authctxt == NULL)
 		fatal("input_userauth_pk_ok: no authentication context");
 
 	if ((r = sshpkt_get_cstring(ssh, &pkalg, NULL)) != 0 ||
 	    (r = sshpkt_get_string(ssh, &pkblob, &blen)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		goto done;
 
 	if ((pktype = sshkey_type_from_name(pkalg)) == KEY_UNSPEC) {
 		debug_f("server sent unknown pkalg %s", pkalg);
 		goto done;
 	}
 	if ((r = sshkey_from_blob(pkblob, blen, &key)) != 0) {
 		debug_r(r, "no key from blob. pkalg %s", pkalg);
 		goto done;
 	}
 	if (key->type != pktype) {
 		error("input_userauth_pk_ok: type mismatch "
 		    "for decoded key (received %d, expected %d)",
 		    key->type, pktype);
 		goto done;
 	}
 
 	/*
 	 * search keys in the reverse order, because last candidate has been
 	 * moved to the end of the queue.  this also avoids confusion by
 	 * duplicate keys
 	 */
 	TAILQ_FOREACH_REVERSE(id, &authctxt->keys, idlist, next) {
 		if (sshkey_equal(key, id->key)) {
 			found = 1;
 			break;
 		}
 	}
 	if (!found || id == NULL) {
 		fp = sshkey_fingerprint(key, options.fingerprint_hash,
 		    SSH_FP_DEFAULT);
 		error_f("server replied with unknown key: %s %s",
 		    sshkey_type(key), fp == NULL ? "<ERROR>" : fp);
 		goto done;
 	}
 	ident = format_identity(id);
 	debug("Server accepts key: %s", ident);
 	sent = sign_and_send_pubkey(ssh, id);
 	r = 0;
  done:
 	sshkey_free(key);
 	free(ident);
 	free(fp);
 	free(pkalg);
 	free(pkblob);
 
 	/* try another method if we did not send a packet */
 	if (r == 0 && sent == 0)
 		userauth(ssh, NULL);
 	return r;
 }
 
 #ifdef GSSAPI
 static int
 userauth_gssapi(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	Gssctxt *gssctxt = NULL;
 	OM_uint32 min;
 	int r, ok = 0;
 	gss_OID mech = NULL;
 
 	/* Try one GSSAPI method at a time, rather than sending them all at
 	 * once. */
 
 	if (authctxt->gss_supported_mechs == NULL)
 		gss_indicate_mechs(&min, &authctxt->gss_supported_mechs);
 
 	/* Check to see whether the mechanism is usable before we offer it */
 	while (authctxt->mech_tried < authctxt->gss_supported_mechs->count &&
 	    !ok) {
 		mech = &authctxt->gss_supported_mechs->
 		    elements[authctxt->mech_tried];
 		/* My DER encoding requires length<128 */
 		if (mech->length < 128 && ssh_gssapi_check_mechanism(&gssctxt,
 		    mech, authctxt->host)) {
 			ok = 1; /* Mechanism works */
 		} else {
 			authctxt->mech_tried++;
 		}
 	}
 
 	if (!ok || mech == NULL)
 		return 0;
 
 	authctxt->methoddata=(void *)gssctxt;
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, 1)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, (mech->length) + 2)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, SSH_GSS_OIDTYPE)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, mech->length)) != 0 ||
 	    (r = sshpkt_put(ssh, mech->elements, mech->length)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_RESPONSE, &input_gssapi_response);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_TOKEN, &input_gssapi_token);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_ERROR, &input_gssapi_error);
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, &input_gssapi_errtok);
 
 	authctxt->mech_tried++; /* Move along to next candidate */
 
 	return 1;
 }
 
 static void
 userauth_gssapi_cleanup(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	Gssctxt *gssctxt = (Gssctxt *)authctxt->methoddata;
 
 	ssh_gssapi_delete_ctx(&gssctxt);
 	authctxt->methoddata = NULL;
 }
 
 static OM_uint32
 process_gssapi_token(struct ssh *ssh, gss_buffer_t recv_tok)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	Gssctxt *gssctxt = authctxt->methoddata;
 	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
 	gss_buffer_desc mic = GSS_C_EMPTY_BUFFER;
 	gss_buffer_desc gssbuf;
 	OM_uint32 status, ms, flags;
 	int r;
 
 	status = ssh_gssapi_init_ctx(gssctxt, options.gss_deleg_creds,
 	    recv_tok, &send_tok, &flags);
 
 	if (send_tok.length > 0) {
 		u_char type = GSS_ERROR(status) ?
 		    SSH2_MSG_USERAUTH_GSSAPI_ERRTOK :
 		    SSH2_MSG_USERAUTH_GSSAPI_TOKEN;
 
 		if ((r = sshpkt_start(ssh, type)) != 0 ||
 		    (r = sshpkt_put_string(ssh, send_tok.value,
 		    send_tok.length)) != 0 ||
 		    (r = sshpkt_send(ssh)) != 0)
 			fatal_fr(r, "send %u packet", type);
 
 		gss_release_buffer(&ms, &send_tok);
 	}
 
 	if (status == GSS_S_COMPLETE) {
 		/* send either complete or MIC, depending on mechanism */
 		if (!(flags & GSS_C_INTEG_FLAG)) {
 			if ((r = sshpkt_start(ssh,
 			    SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE)) != 0 ||
 			    (r = sshpkt_send(ssh)) != 0)
 				fatal_fr(r, "send completion");
 		} else {
 			struct sshbuf *b;
 
 			if ((b = sshbuf_new()) == NULL)
 				fatal_f("sshbuf_new failed");
 			ssh_gssapi_buildmic(b, authctxt->server_user,
 			    authctxt->service, "gssapi-with-mic",
 			    ssh->kex->session_id);
 
 			if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL)
 				fatal_f("sshbuf_mutable_ptr failed");
 			gssbuf.length = sshbuf_len(b);
 
 			status = ssh_gssapi_sign(gssctxt, &gssbuf, &mic);
 
 			if (!GSS_ERROR(status)) {
 				if ((r = sshpkt_start(ssh,
 				    SSH2_MSG_USERAUTH_GSSAPI_MIC)) != 0 ||
 				    (r = sshpkt_put_string(ssh, mic.value,
 				    mic.length)) != 0 ||
 				    (r = sshpkt_send(ssh)) != 0)
 					fatal_fr(r, "send MIC");
 			}
 
 			sshbuf_free(b);
 			gss_release_buffer(&ms, &mic);
 		}
 	}
 
 	return status;
 }
 
 static int
 input_gssapi_response(int type, u_int32_t plen, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	Gssctxt *gssctxt;
 	size_t oidlen;
 	u_char *oidv = NULL;
 	int r;
 
 	if (authctxt == NULL)
 		fatal("input_gssapi_response: no authentication context");
 	gssctxt = authctxt->methoddata;
 
 	/* Setup our OID */
 	if ((r = sshpkt_get_string(ssh, &oidv, &oidlen)) != 0)
 		goto done;
 
 	if (oidlen <= 2 ||
 	    oidv[0] != SSH_GSS_OIDTYPE ||
 	    oidv[1] != oidlen - 2) {
 		debug("Badly encoded mechanism OID received");
 		userauth(ssh, NULL);
 		goto ok;
 	}
 
 	if (!ssh_gssapi_check_oid(gssctxt, oidv + 2, oidlen - 2))
 		fatal("Server returned different OID than expected");
 
 	if ((r = sshpkt_get_end(ssh)) != 0)
 		goto done;
 
 	if (GSS_ERROR(process_gssapi_token(ssh, GSS_C_NO_BUFFER))) {
 		/* Start again with next method on list */
 		debug("Trying to start again");
 		userauth(ssh, NULL);
 		goto ok;
 	}
  ok:
 	r = 0;
  done:
 	free(oidv);
 	return r;
 }
 
 static int
 input_gssapi_token(int type, u_int32_t plen, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	gss_buffer_desc recv_tok;
 	u_char *p = NULL;
 	size_t len;
 	OM_uint32 status;
 	int r;
 
 	if (authctxt == NULL)
 		fatal("input_gssapi_response: no authentication context");
 
 	if ((r = sshpkt_get_string(ssh, &p, &len)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0)
 		goto out;
 
 	recv_tok.value = p;
 	recv_tok.length = len;
 	status = process_gssapi_token(ssh, &recv_tok);
 
 	/* Start again with the next method in the list */
 	if (GSS_ERROR(status)) {
 		userauth(ssh, NULL);
 		/* ok */
 	}
 	r = 0;
  out:
 	free(p);
 	return r;
 }
 
 static int
 input_gssapi_errtok(int type, u_int32_t plen, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	Gssctxt *gssctxt;
 	gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER;
 	gss_buffer_desc recv_tok;
 	OM_uint32 ms;
 	u_char *p = NULL;
 	size_t len;
 	int r;
 
 	if (authctxt == NULL)
 		fatal("input_gssapi_response: no authentication context");
 	gssctxt = authctxt->methoddata;
 
 	if ((r = sshpkt_get_string(ssh, &p, &len)) != 0 ||
 	    (r = sshpkt_get_end(ssh)) != 0) {
 		free(p);
 		return r;
 	}
 
 	/* Stick it into GSSAPI and see what it says */
 	recv_tok.value = p;
 	recv_tok.length = len;
 	(void)ssh_gssapi_init_ctx(gssctxt, options.gss_deleg_creds,
 	    &recv_tok, &send_tok, NULL);
 	free(p);
 	gss_release_buffer(&ms, &send_tok);
 
 	/* Server will be returning a failed packet after this one */
 	return 0;
 }
 
 static int
 input_gssapi_error(int type, u_int32_t plen, struct ssh *ssh)
 {
 	char *msg = NULL;
 	char *lang = NULL;
 	int r;
 
 	if ((r = sshpkt_get_u32(ssh, NULL)) != 0 ||	/* maj */
 	    (r = sshpkt_get_u32(ssh, NULL)) != 0 ||	/* min */
 	    (r = sshpkt_get_cstring(ssh, &msg, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0)
 		goto out;
 	r = sshpkt_get_end(ssh);
 	debug("Server GSSAPI Error:\n%s", msg);
  out:
 	free(msg);
 	free(lang);
 	return r;
 }
 #endif /* GSSAPI */
 
 static int
 userauth_none(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	int r;
 
 	/* initial userauth request */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 	return 1;
 }
 
 static int
 userauth_passwd(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	char *password, *prompt = NULL;
 	const char *host = options.host_key_alias ?  options.host_key_alias :
 	    authctxt->host;
 	int r;
 
 	if (authctxt->attempt_passwd++ >= options.number_of_password_prompts)
 		return 0;
 
 	if (authctxt->attempt_passwd != 1)
 		error("Permission denied, please try again.");
 
 	xasprintf(&prompt, "%s@%s's password: ", authctxt->server_user, host);
 	password = read_passphrase(prompt, 0);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 0)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, password)) != 0 ||
 	    (r = sshpkt_add_padding(ssh, 64)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 
 	free(prompt);
 	if (password != NULL)
 		freezero(password, strlen(password));
 
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ,
 	    &input_userauth_passwd_changereq);
 
 	return 1;
 }
 
 /*
  * parse PASSWD_CHANGEREQ, prompt user and send SSH2_MSG_USERAUTH_REQUEST
  */
 static int
 input_userauth_passwd_changereq(int type, u_int32_t seqnr, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	char *info = NULL, *lang = NULL, *password = NULL, *retype = NULL;
 	char prompt[256];
 	const char *host;
 	int r;
 
 	debug2("input_userauth_passwd_changereq");
 
 	if (authctxt == NULL)
 		fatal("input_userauth_passwd_changereq: "
 		    "no authentication context");
 	host = options.host_key_alias ? options.host_key_alias : authctxt->host;
 
 	if ((r = sshpkt_get_cstring(ssh, &info, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0)
 		goto out;
 	if (strlen(info) > 0)
 		logit("%s", info);
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, 1)) != 0)	/* additional info */
 		goto out;
 
 	snprintf(prompt, sizeof(prompt),
 	    "Enter %.30s@%.128s's old password: ",
 	    authctxt->server_user, host);
 	password = read_passphrase(prompt, 0);
 	if ((r = sshpkt_put_cstring(ssh, password)) != 0)
 		goto out;
 
 	freezero(password, strlen(password));
 	password = NULL;
 	while (password == NULL) {
 		snprintf(prompt, sizeof(prompt),
 		    "Enter %.30s@%.128s's new password: ",
 		    authctxt->server_user, host);
 		password = read_passphrase(prompt, RP_ALLOW_EOF);
 		if (password == NULL) {
 			/* bail out */
 			r = 0;
 			goto out;
 		}
 		snprintf(prompt, sizeof(prompt),
 		    "Retype %.30s@%.128s's new password: ",
 		    authctxt->server_user, host);
 		retype = read_passphrase(prompt, 0);
 		if (strcmp(password, retype) != 0) {
 			freezero(password, strlen(password));
 			logit("Mismatch; try again, EOF to quit.");
 			password = NULL;
 		}
 		freezero(retype, strlen(retype));
 	}
 	if ((r = sshpkt_put_cstring(ssh, password)) != 0 ||
 	    (r = sshpkt_add_padding(ssh, 64)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		goto out;
 
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ,
 	    &input_userauth_passwd_changereq);
 	r = 0;
  out:
 	if (password)
 		freezero(password, strlen(password));
 	free(info);
 	free(lang);
 	return r;
 }
 
 /*
  * Select an algorithm for publickey signatures.
  * Returns algorithm (caller must free) or NULL if no mutual algorithm found.
  *
  * Call with ssh==NULL to ignore server-sig-algs extension list and
  * only attempt with the key's base signature type.
  */
 static char *
 key_sig_algorithm(struct ssh *ssh, const struct sshkey *key)
 {
 	char *allowed, *oallowed, *cp, *tmp, *alg = NULL;
 	const char *server_sig_algs;
 
 	/*
 	 * The signature algorithm will only differ from the key algorithm
 	 * for RSA keys/certs and when the server advertises support for
 	 * newer (SHA2) algorithms.
 	 */
 	if (ssh == NULL || ssh->kex->server_sig_algs == NULL ||
 	    (key->type != KEY_RSA && key->type != KEY_RSA_CERT) ||
 	    (key->type == KEY_RSA_CERT && (ssh->compat & SSH_BUG_SIGTYPE))) {
 		/* Filter base key signature alg against our configuration */
 		return match_list(sshkey_ssh_name(key),
 		    options.pubkey_accepted_algos, NULL);
 	}
 
 	/*
 	 * Workaround OpenSSH 7.4 bug: this version supports RSA/SHA-2 but
 	 * fails to advertise it via SSH2_MSG_EXT_INFO.
 	 */
 	server_sig_algs = ssh->kex->server_sig_algs;
 	if (key->type == KEY_RSA && (ssh->compat & SSH_BUG_SIGTYPE74))
 		server_sig_algs = "rsa-sha2-256,rsa-sha2-512";
 
 	/*
 	 * For RSA keys/certs, since these might have a different sig type:
 	 * find the first entry in PubkeyAcceptedAlgorithms of the right type
 	 * that also appears in the supported signature algorithms list from
 	 * the server.
 	 */
 	oallowed = allowed = xstrdup(options.pubkey_accepted_algos);
 	while ((cp = strsep(&allowed, ",")) != NULL) {
 		if (sshkey_type_from_name(cp) != key->type)
 			continue;
 		tmp = match_list(sshkey_sigalg_by_name(cp),
 		    server_sig_algs, NULL);
 		if (tmp != NULL)
 			alg = xstrdup(cp);
 		free(tmp);
 		if (alg != NULL)
 			break;
 	}
 	free(oallowed);
 	return alg;
 }
 
 static int
 identity_sign(struct identity *id, u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen, u_int compat, const char *alg)
 {
 	struct sshkey *sign_key = NULL, *prv = NULL;
 	int is_agent = 0, retried = 0, r = SSH_ERR_INTERNAL_ERROR;
 	struct notifier_ctx *notifier = NULL;
 	char *fp = NULL, *pin = NULL, *prompt = NULL;
 
 	*sigp = NULL;
 	*lenp = 0;
 
 	/* The agent supports this key. */
 	if (id->key != NULL && id->agent_fd != -1) {
 		return ssh_agent_sign(id->agent_fd, id->key, sigp, lenp,
 		    data, datalen, alg, compat);
 	}
 
 	/*
 	 * We have already loaded the private key or the private key is
 	 * stored in external hardware.
 	 */
 	if (id->key != NULL &&
 	    (id->isprivate || (id->key->flags & SSHKEY_FLAG_EXT))) {
 		sign_key = id->key;
 		is_agent = 1;
 	} else {
 		/* Load the private key from the file. */
 		if ((prv = load_identity_file(id)) == NULL)
 			return SSH_ERR_KEY_NOT_FOUND;
 		if (id->key != NULL && !sshkey_equal_public(prv, id->key)) {
 			error_f("private key %s contents do not match public",
 			    id->filename);
 			r = SSH_ERR_KEY_NOT_FOUND;
 			goto out;
 		}
 		sign_key = prv;
 	}
  retry_pin:
 	/* Prompt for touch for non-agent FIDO keys that request UP */
 	if (!is_agent && sshkey_is_sk(sign_key) &&
 	    (sign_key->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
 		/* XXX should batch mode just skip these? */
 		if ((fp = sshkey_fingerprint(sign_key,
 		    options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
 			fatal_f("fingerprint failed");
 		notifier = notify_start(options.batch_mode,
 		    "Confirm user presence for key %s %s",
 		    sshkey_type(sign_key), fp);
 		free(fp);
 	}
 	if ((r = sshkey_sign(sign_key, sigp, lenp, data, datalen,
 	    alg, options.sk_provider, pin, compat)) != 0) {
 		debug_fr(r, "sshkey_sign");
 		if (!retried && pin == NULL && !is_agent &&
 		    sshkey_is_sk(sign_key) &&
 		    r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
 			notify_complete(notifier, NULL);
 			notifier = NULL;
 			xasprintf(&prompt, "Enter PIN for %s key %s: ",
 			    sshkey_type(sign_key), id->filename);
 			pin = read_passphrase(prompt, 0);
 			retried = 1;
 			goto retry_pin;
 		}
 		goto out;
 	}
 
 	/*
 	 * PKCS#11 tokens may not support all signature algorithms,
 	 * so check what we get back.
 	 */
 	if ((r = sshkey_check_sigtype(*sigp, *lenp, alg)) != 0) {
 		debug_fr(r, "sshkey_check_sigtype");
 		goto out;
 	}
 	/* success */
 	r = 0;
  out:
 	free(prompt);
 	if (pin != NULL)
 		freezero(pin, strlen(pin));
 	notify_complete(notifier, r == 0 ? "User presence confirmed" : NULL);
 	sshkey_free(prv);
 	return r;
 }
 
 static int
 id_filename_matches(Identity *id, Identity *private_id)
 {
 	static const char * const suffixes[] = { ".pub", "-cert.pub", NULL };
 	size_t len = strlen(id->filename), plen = strlen(private_id->filename);
 	size_t i, slen;
 
 	if (strcmp(id->filename, private_id->filename) == 0)
 		return 1;
 	for (i = 0; suffixes[i]; i++) {
 		slen = strlen(suffixes[i]);
 		if (len > slen && plen == len - slen &&
 		    strcmp(id->filename + (len - slen), suffixes[i]) == 0 &&
 		    memcmp(id->filename, private_id->filename, plen) == 0)
 			return 1;
 	}
 	return 0;
 }
 
 static int
 sign_and_send_pubkey(struct ssh *ssh, Identity *id)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	struct sshbuf *b = NULL;
 	Identity *private_id, *sign_id = NULL;
 	u_char *signature = NULL;
 	size_t slen = 0, skip = 0;
 	int r, fallback_sigtype, sent = 0;
 	char *alg = NULL, *fp = NULL;
 	const char *loc = "", *method = "publickey";
 	int hostbound = 0;
 
 	/* prefer host-bound pubkey signatures if supported by server */
 	if ((ssh->kex->flags & KEX_HAS_PUBKEY_HOSTBOUND) != 0 &&
 	    (options.pubkey_authentication & SSH_PUBKEY_AUTH_HBOUND) != 0) {
 		hostbound = 1;
 		method = "publickey-hostbound-v00@openssh.com";
 	}
 
 	if ((fp = sshkey_fingerprint(id->key, options.fingerprint_hash,
 	    SSH_FP_DEFAULT)) == NULL)
 		return 0;
 
 	debug3_f("using %s with %s %s", method, sshkey_type(id->key), fp);
 
 	/*
 	 * If the key is an certificate, try to find a matching private key
 	 * and use it to complete the signature.
 	 * If no such private key exists, fall back to trying the certificate
 	 * key itself in case it has a private half already loaded.
 	 * This will try to set sign_id to the private key that will perform
 	 * the signature.
 	 */
 	if (sshkey_is_cert(id->key)) {
 		TAILQ_FOREACH(private_id, &authctxt->keys, next) {
 			if (sshkey_equal_public(id->key, private_id->key) &&
 			    id->key->type != private_id->key->type) {
 				sign_id = private_id;
 				break;
 			}
 		}
 		/*
 		 * Exact key matches are preferred, but also allow
 		 * filename matches for non-PKCS#11/agent keys that
 		 * didn't load public keys. This supports the case
 		 * of keeping just a private key file and public
 		 * certificate on disk.
 		 */
 		if (sign_id == NULL &&
 		    !id->isprivate && id->agent_fd == -1 &&
 		    (id->key->flags & SSHKEY_FLAG_EXT) == 0) {
 			TAILQ_FOREACH(private_id, &authctxt->keys, next) {
 				if (private_id->key == NULL &&
 				    id_filename_matches(id, private_id)) {
 					sign_id = private_id;
 					break;
 				}
 			}
 		}
 		if (sign_id != NULL) {
 			debug2_f("using private key \"%s\"%s for "
 			    "certificate", sign_id->filename,
 			    sign_id->agent_fd != -1 ? " from agent" : "");
 		} else {
 			debug_f("no separate private key for certificate "
 			    "\"%s\"", id->filename);
 		}
 	}
 
 	/*
 	 * If the above didn't select another identity to do the signing
 	 * then default to the one we started with.
 	 */
 	if (sign_id == NULL)
 		sign_id = id;
 
 	/* assemble and sign data */
 	for (fallback_sigtype = 0; fallback_sigtype <= 1; fallback_sigtype++) {
 		free(alg);
 		slen = 0;
 		signature = NULL;
 		if ((alg = key_sig_algorithm(fallback_sigtype ? NULL : ssh,
 		    id->key)) == NULL) {
 			error_f("no mutual signature supported");
 			goto out;
 		}
 		debug3_f("signing using %s %s", alg, fp);
 
 		sshbuf_free(b);
 		if ((b = sshbuf_new()) == NULL)
 			fatal_f("sshbuf_new failed");
 		if (ssh->compat & SSH_OLD_SESSIONID) {
 			if ((r = sshbuf_putb(b, ssh->kex->session_id)) != 0)
 				fatal_fr(r, "sshbuf_putb");
 		} else {
 			if ((r = sshbuf_put_stringb(b,
 			    ssh->kex->session_id)) != 0)
 				fatal_fr(r, "sshbuf_put_stringb");
 		}
 		skip = sshbuf_len(b);
 		if ((r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 		    (r = sshbuf_put_cstring(b, authctxt->server_user)) != 0 ||
 		    (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||
 		    (r = sshbuf_put_cstring(b, method)) != 0 ||
 		    (r = sshbuf_put_u8(b, 1)) != 0 ||
 		    (r = sshbuf_put_cstring(b, alg)) != 0 ||
 		    (r = sshkey_puts(id->key, b)) != 0) {
 			fatal_fr(r, "assemble signed data");
 		}
 		if (hostbound) {
 			if (ssh->kex->initial_hostkey == NULL) {
 				fatal_f("internal error: initial hostkey "
 				    "not recorded");
 			}
 			if ((r = sshkey_puts(ssh->kex->initial_hostkey, b)) != 0)
 				fatal_fr(r, "assemble %s hostkey", method);
 		}
 		/* generate signature */
 		r = identity_sign(sign_id, &signature, &slen,
 		    sshbuf_ptr(b), sshbuf_len(b), ssh->compat, alg);
 		if (r == 0)
 			break;
 		else if (r == SSH_ERR_KEY_NOT_FOUND)
 			goto out; /* soft failure */
 		else if (r == SSH_ERR_SIGN_ALG_UNSUPPORTED &&
 		    !fallback_sigtype) {
 			if (sign_id->agent_fd != -1)
 				loc = "agent ";
 			else if ((sign_id->key->flags & SSHKEY_FLAG_EXT) != 0)
 				loc = "token ";
 			logit("%skey %s %s returned incorrect signature type",
 			    loc, sshkey_type(id->key), fp);
 			continue;
 		}
 		error_fr(r, "signing failed for %s \"%s\"%s",
 		    sshkey_type(sign_id->key), sign_id->filename,
 		    id->agent_fd != -1 ? " from agent" : "");
 		goto out;
 	}
 	if (slen == 0 || signature == NULL) /* shouldn't happen */
 		fatal_f("no signature");
 
 	/* append signature */
 	if ((r = sshbuf_put_string(b, signature, slen)) != 0)
 		fatal_fr(r, "append signature");
 
 #ifdef DEBUG_PK
 	sshbuf_dump(b, stderr);
 #endif
 	/* skip session id and packet type */
 	if ((r = sshbuf_consume(b, skip + 1)) != 0)
 		fatal_fr(r, "consume");
 
 	/* put remaining data from buffer into packet */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_putb(ssh, b)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "enqueue request");
 
 	/* success */
 	sent = 1;
 
  out:
 	free(fp);
 	free(alg);
 	sshbuf_free(b);
 	freezero(signature, slen);
 	return sent;
 }
 
 static int
 send_pubkey_test(struct ssh *ssh, Identity *id)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	u_char *blob = NULL;
 	char *alg = NULL;
 	size_t bloblen;
 	u_int have_sig = 0;
 	int sent = 0, r;
 
 	if ((alg = key_sig_algorithm(ssh, id->key)) == NULL) {
 		debug_f("no mutual signature algorithm");
 		goto out;
 	}
 
 	if ((r = sshkey_to_blob(id->key, &blob, &bloblen)) != 0) {
 		/* we cannot handle this key */
 		debug3_f("cannot handle key");
 		goto out;
 	}
 	/* register callback for USERAUTH_PK_OK message */
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_PK_OK, &input_userauth_pk_ok);
 
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_u8(ssh, have_sig)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, alg)) != 0 ||
 	    (r = sshpkt_put_string(ssh, blob, bloblen)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 	sent = 1;
 
  out:
 	free(alg);
 	free(blob);
 	return sent;
 }
 
 static struct sshkey *
 load_identity_file(Identity *id)
 {
 	struct sshkey *private = NULL;
 	char prompt[300], *passphrase, *comment;
 	int r, quit = 0, i;
 	struct stat st;
 
 	if (stat(id->filename, &st) == -1) {
 		do_log2(id->userprovided ?
 		    SYSLOG_LEVEL_INFO : SYSLOG_LEVEL_DEBUG3,
 		    "no such identity: %s: %s", id->filename, strerror(errno));
 		return NULL;
 	}
 	snprintf(prompt, sizeof prompt,
 	    "Enter passphrase for key '%.100s': ", id->filename);
 	for (i = 0; i <= options.number_of_password_prompts; i++) {
 		if (i == 0)
 			passphrase = "";
 		else {
 			passphrase = read_passphrase(prompt, 0);
 			if (*passphrase == '\0') {
 				debug2("no passphrase given, try next key");
 				free(passphrase);
 				break;
 			}
 		}
 		switch ((r = sshkey_load_private_type(KEY_UNSPEC, id->filename,
 		    passphrase, &private, &comment))) {
 		case 0:
 			break;
 		case SSH_ERR_KEY_WRONG_PASSPHRASE:
 			if (options.batch_mode) {
 				quit = 1;
 				break;
 			}
 			if (i != 0)
 				debug2("bad passphrase given, try again...");
 			break;
 		case SSH_ERR_SYSTEM_ERROR:
 			if (errno == ENOENT) {
 				debug2_r(r, "Load key \"%s\"", id->filename);
 				quit = 1;
 				break;
 			}
 			/* FALLTHROUGH */
 		default:
 			error_r(r, "Load key \"%s\"", id->filename);
 			quit = 1;
 			break;
 		}
 		if (private != NULL && sshkey_is_sk(private) &&
 		    options.sk_provider == NULL) {
 			debug("key \"%s\" is an authenticator-hosted key, "
 			    "but no provider specified", id->filename);
 			sshkey_free(private);
 			private = NULL;
 			quit = 1;
 		}
 		if (!quit && (r = sshkey_check_rsa_length(private,
 		    options.required_rsa_size)) != 0) {
 			debug_fr(r, "Skipping key %s", id->filename);
 			sshkey_free(private);
 			private = NULL;
 			quit = 1;
 		}
 		if (!quit && private != NULL && id->agent_fd == -1 &&
 		    !(id->key && id->isprivate))
 			maybe_add_key_to_agent(id->filename, private, comment,
 			    passphrase);
 		if (i > 0)
 			freezero(passphrase, strlen(passphrase));
 		free(comment);
 		if (private != NULL || quit)
 			break;
 	}
 	return private;
 }
 
 static int
 key_type_allowed_by_config(struct sshkey *key)
 {
 	if (match_pattern_list(sshkey_ssh_name(key),
 	    options.pubkey_accepted_algos, 0) == 1)
 		return 1;
 
 	/* RSA keys/certs might be allowed by alternate signature types */
 	switch (key->type) {
 	case KEY_RSA:
 		if (match_pattern_list("rsa-sha2-512",
 		    options.pubkey_accepted_algos, 0) == 1)
 			return 1;
 		if (match_pattern_list("rsa-sha2-256",
 		    options.pubkey_accepted_algos, 0) == 1)
 			return 1;
 		break;
 	case KEY_RSA_CERT:
 		if (match_pattern_list("rsa-sha2-512-cert-v01@openssh.com",
 		    options.pubkey_accepted_algos, 0) == 1)
 			return 1;
 		if (match_pattern_list("rsa-sha2-256-cert-v01@openssh.com",
 		    options.pubkey_accepted_algos, 0) == 1)
 			return 1;
 		break;
 	}
 	return 0;
 }
 
 /* obtain a list of keys from the agent */
 static int
 get_agent_identities(struct ssh *ssh, int *agent_fdp,
     struct ssh_identitylist **idlistp)
 {
 	int r, agent_fd;
 	struct ssh_identitylist *idlist;
 
 	if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
 		if (r != SSH_ERR_AGENT_NOT_PRESENT)
 			debug_fr(r, "ssh_get_authentication_socket");
 		return r;
 	}
 	if ((r = ssh_agent_bind_hostkey(agent_fd, ssh->kex->initial_hostkey,
 	    ssh->kex->session_id, ssh->kex->initial_sig, 0)) == 0)
 		debug_f("bound agent to hostkey");
 	else
 		debug2_fr(r, "ssh_agent_bind_hostkey");
 
 	if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
 		debug_fr(r, "ssh_fetch_identitylist");
 		close(agent_fd);
 		return r;
 	}
 	/* success */
 	*agent_fdp = agent_fd;
 	*idlistp = idlist;
 	debug_f("agent returned %zu keys", idlist->nkeys);
 	return 0;
 }
 
 /*
  * try keys in the following order:
  *	1. certificates listed in the config file
  *	2. other input certificates
  *	3. agent keys that are found in the config file
  *	4. other agent keys
  *	5. keys that are only listed in the config file
  */
 static void
 pubkey_prepare(struct ssh *ssh, Authctxt *authctxt)
 {
 	struct identity *id, *id2, *tmp;
 	struct idlist agent, files, *preferred;
 	struct sshkey *key;
 	int disallowed, agent_fd = -1, i, r, found;
 	size_t j;
 	struct ssh_identitylist *idlist;
 	char *cp, *ident;
 
 	TAILQ_INIT(&agent);	/* keys from the agent */
 	TAILQ_INIT(&files);	/* keys from the config file */
 	preferred = &authctxt->keys;
 	TAILQ_INIT(preferred);	/* preferred order of keys */
 
 	/* list of keys stored in the filesystem and PKCS#11 */
 	for (i = 0; i < options.num_identity_files; i++) {
 		key = options.identity_keys[i];
 		if (key && key->cert &&
 		    key->cert->type != SSH2_CERT_TYPE_USER) {
 			debug_f("ignoring certificate %s: not a user "
 			    "certificate", options.identity_files[i]);
 			continue;
 		}
 		if (key && sshkey_is_sk(key) && options.sk_provider == NULL) {
 			debug_f("ignoring authenticator-hosted key %s as no "
 			    "SecurityKeyProvider has been specified",
 			    options.identity_files[i]);
 			continue;
 		}
 		options.identity_keys[i] = NULL;
 		id = xcalloc(1, sizeof(*id));
 		id->agent_fd = -1;
 		id->key = key;
 		id->filename = xstrdup(options.identity_files[i]);
 		id->userprovided = options.identity_file_userprovided[i];
 		TAILQ_INSERT_TAIL(&files, id, next);
 	}
 	/* list of certificates specified by user */
 	for (i = 0; i < options.num_certificate_files; i++) {
 		key = options.certificates[i];
 		if (!sshkey_is_cert(key) || key->cert == NULL ||
 		    key->cert->type != SSH2_CERT_TYPE_USER) {
 			debug_f("ignoring certificate %s: not a user "
 			    "certificate", options.identity_files[i]);
 			continue;
 		}
 		if (key && sshkey_is_sk(key) && options.sk_provider == NULL) {
 			debug_f("ignoring authenticator-hosted key "
 			    "certificate %s as no "
 			    "SecurityKeyProvider has been specified",
 			    options.identity_files[i]);
 			continue;
 		}
 		id = xcalloc(1, sizeof(*id));
 		id->agent_fd = -1;
 		id->key = key;
 		id->filename = xstrdup(options.certificate_files[i]);
 		id->userprovided = options.certificate_file_userprovided[i];
 		TAILQ_INSERT_TAIL(preferred, id, next);
 	}
 	/* list of keys supported by the agent */
 	if ((r = get_agent_identities(ssh, &agent_fd, &idlist)) == 0) {
 		for (j = 0; j < idlist->nkeys; j++) {
 			if ((r = sshkey_check_rsa_length(idlist->keys[j],
 			    options.required_rsa_size)) != 0) {
 				debug_fr(r, "ignoring %s agent key",
 				    sshkey_ssh_name(idlist->keys[j]));
 				continue;
 			}
 			found = 0;
 			TAILQ_FOREACH(id, &files, next) {
 				/*
 				 * agent keys from the config file are
 				 * preferred
 				 */
 				if (sshkey_equal(idlist->keys[j], id->key)) {
 					TAILQ_REMOVE(&files, id, next);
 					TAILQ_INSERT_TAIL(preferred, id, next);
 					id->agent_fd = agent_fd;
 					found = 1;
 					break;
 				}
 			}
 			if (!found && !options.identities_only) {
 				id = xcalloc(1, sizeof(*id));
 				/* XXX "steals" key/comment from idlist */
 				id->key = idlist->keys[j];
 				id->filename = idlist->comments[j];
 				idlist->keys[j] = NULL;
 				idlist->comments[j] = NULL;
 				id->agent_fd = agent_fd;
 				TAILQ_INSERT_TAIL(&agent, id, next);
 			}
 		}
 		ssh_free_identitylist(idlist);
 		/* append remaining agent keys */
 		TAILQ_CONCAT(preferred, &agent, next);
 		authctxt->agent_fd = agent_fd;
 	}
 	/* Prefer PKCS11 keys that are explicitly listed */
 	TAILQ_FOREACH_SAFE(id, &files, next, tmp) {
 		if (id->key == NULL || (id->key->flags & SSHKEY_FLAG_EXT) == 0)
 			continue;
 		found = 0;
 		TAILQ_FOREACH(id2, &files, next) {
 			if (id2->key == NULL ||
 			    (id2->key->flags & SSHKEY_FLAG_EXT) != 0)
 				continue;
 			if (sshkey_equal(id->key, id2->key)) {
 				TAILQ_REMOVE(&files, id, next);
 				TAILQ_INSERT_TAIL(preferred, id, next);
 				found = 1;
 				break;
 			}
 		}
 		/* If IdentitiesOnly set and key not found then don't use it */
 		if (!found && options.identities_only) {
 			TAILQ_REMOVE(&files, id, next);
 			freezero(id, sizeof(*id));
 		}
 	}
 	/* append remaining keys from the config file */
 	TAILQ_CONCAT(preferred, &files, next);
 	/* finally, filter by PubkeyAcceptedAlgorithms */
 	TAILQ_FOREACH_SAFE(id, preferred, next, id2) {
 		disallowed = 0;
 		cp = NULL;
 		if (id->key == NULL)
 			continue;
 		if (!key_type_allowed_by_config(id->key)) {
 			debug("Skipping %s key %s - corresponding algorithm "
 			    "not in PubkeyAcceptedAlgorithms",
 			    sshkey_ssh_name(id->key), id->filename);
 			disallowed = 1;
 		} else if (ssh->kex->server_sig_algs != NULL &&
 		    (cp = key_sig_algorithm(ssh, id->key)) == NULL) {
 			debug("Skipping %s key %s - corresponding algorithm "
 			    "not supported by server",
 			    sshkey_ssh_name(id->key), id->filename);
 			disallowed = 1;
 		}
 		free(cp);
 		if (!disallowed)
 			continue;
 		/* remove key */
 		TAILQ_REMOVE(preferred, id, next);
 		sshkey_free(id->key);
 		free(id->filename);
 		memset(id, 0, sizeof(*id));
 	}
 	/* List the keys we plan on using */
 	TAILQ_FOREACH_SAFE(id, preferred, next, id2) {
 		ident = format_identity(id);
 		debug("Will attempt key: %s", ident);
 		free(ident);
 	}
 	debug2_f("done");
 }
 
 static void
 pubkey_cleanup(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	Identity *id;
 
 	if (authctxt->agent_fd != -1) {
 		ssh_close_authentication_socket(authctxt->agent_fd);
 		authctxt->agent_fd = -1;
 	}
 	for (id = TAILQ_FIRST(&authctxt->keys); id;
 	    id = TAILQ_FIRST(&authctxt->keys)) {
 		TAILQ_REMOVE(&authctxt->keys, id, next);
 		sshkey_free(id->key);
 		free(id->filename);
 		free(id);
 	}
 }
 
 static void
 pubkey_reset(Authctxt *authctxt)
 {
 	Identity *id;
 
 	TAILQ_FOREACH(id, &authctxt->keys, next)
 		id->tried = 0;
 }
 
 static int
 userauth_pubkey(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	Identity *id;
 	int sent = 0;
 	char *ident;
 	static int prepared;
 
 	if (!prepared) {
 		pubkey_prepare(ssh, authctxt);
 		prepared = 1;
 	}
 
 	while ((id = TAILQ_FIRST(&authctxt->keys))) {
 		if (id->tried++)
 			return (0);
 		/* move key to the end of the queue */
 		TAILQ_REMOVE(&authctxt->keys, id, next);
 		TAILQ_INSERT_TAIL(&authctxt->keys, id, next);
 		/*
 		 * send a test message if we have the public key. for
 		 * encrypted keys we cannot do this and have to load the
 		 * private key instead
 		 */
 		if (id->key != NULL) {
 			ident = format_identity(id);
 			debug("Offering public key: %s", ident);
 			free(ident);
 			sent = send_pubkey_test(ssh, id);
 		} else {
 			debug("Trying private key: %s", id->filename);
 			id->key = load_identity_file(id);
 			if (id->key != NULL) {
 				if (id->key != NULL) {
 					id->isprivate = 1;
 					sent = sign_and_send_pubkey(ssh, id);
 				}
 				sshkey_free(id->key);
 				id->key = NULL;
 				id->isprivate = 0;
 			}
 		}
 		if (sent)
 			return (sent);
 	}
 	return (0);
 }
 
 /*
  * Send userauth request message specifying keyboard-interactive method.
  */
 static int
 userauth_kbdint(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	int r;
 
 	if (authctxt->attempt_kbdint++ >= options.number_of_password_prompts)
 		return 0;
 	/* disable if no SSH2_MSG_USERAUTH_INFO_REQUEST has been seen */
 	if (authctxt->attempt_kbdint > 1 && !authctxt->info_req_seen) {
 		debug3("userauth_kbdint: disable: no info_req_seen");
 		ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_INFO_REQUEST, NULL);
 		return 0;
 	}
 
 	debug2("userauth_kbdint");
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "")) != 0 ||		/* lang */
 	    (r = sshpkt_put_cstring(ssh, options.kbd_interactive_devices ?
 	    options.kbd_interactive_devices : "")) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 
 	ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_INFO_REQUEST, &input_userauth_info_req);
 	return 1;
 }
 
 /*
  * parse INFO_REQUEST, prompt user and send INFO_RESPONSE
  */
 static int
 input_userauth_info_req(int type, u_int32_t seq, struct ssh *ssh)
 {
 	Authctxt *authctxt = ssh->authctxt;
 	char *name = NULL, *inst = NULL, *lang = NULL, *prompt = NULL;
 	char *display_prompt = NULL, *response = NULL;
 	u_char echo = 0;
 	u_int num_prompts, i;
 	int r;
 
 	debug2_f("entering");
 
 	if (authctxt == NULL)
 		fatal_f("no authentication context");
 
 	authctxt->info_req_seen = 1;
 
 	if ((r = sshpkt_get_cstring(ssh, &name, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &inst, NULL)) != 0 ||
 	    (r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0)
 		goto out;
 	if (strlen(name) > 0)
 		logit("%s", name);
 	if (strlen(inst) > 0)
 		logit("%s", inst);
 
 	if ((r = sshpkt_get_u32(ssh, &num_prompts)) != 0)
 		goto out;
 	/*
 	 * Begin to build info response packet based on prompts requested.
 	 * We commit to providing the correct number of responses, so if
 	 * further on we run into a problem that prevents this, we have to
 	 * be sure and clean this up and send a correct error response.
 	 */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_INFO_RESPONSE)) != 0 ||
 	    (r = sshpkt_put_u32(ssh, num_prompts)) != 0)
 		goto out;
 
 	debug2_f("num_prompts %d", num_prompts);
 	for (i = 0; i < num_prompts; i++) {
 		if ((r = sshpkt_get_cstring(ssh, &prompt, NULL)) != 0 ||
 		    (r = sshpkt_get_u8(ssh, &echo)) != 0)
 			goto out;
 		if (asmprintf(&display_prompt, INT_MAX, NULL, "(%s@%s) %s",
 		    authctxt->server_user, options.host_key_alias ?
 		    options.host_key_alias : authctxt->host, prompt) == -1)
 			fatal_f("asmprintf failed");
 		response = read_passphrase(display_prompt, echo ? RP_ECHO : 0);
 		if ((r = sshpkt_put_cstring(ssh, response)) != 0)
 			goto out;
 		freezero(response, strlen(response));
 		free(prompt);
 		free(display_prompt);
 		display_prompt = response = prompt = NULL;
 	}
 	/* done with parsing incoming message. */
 	if ((r = sshpkt_get_end(ssh)) != 0 ||
 	    (r = sshpkt_add_padding(ssh, 64)) != 0)
 		goto out;
 	r = sshpkt_send(ssh);
  out:
 	if (response)
 		freezero(response, strlen(response));
 	free(prompt);
 	free(display_prompt);
 	free(name);
 	free(inst);
 	free(lang);
 	return r;
 }
 
 static int
 ssh_keysign(struct ssh *ssh, struct sshkey *key, u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen)
 {
 	struct sshbuf *b;
 	struct stat st;
 	pid_t pid;
 	int r, to[2], from[2], status;
 	int sock = ssh_packet_get_connection_in(ssh);
 	u_char rversion = 0, version = 2;
 	void (*osigchld)(int);
 
 	*sigp = NULL;
 	*lenp = 0;
 
 	if (stat(_PATH_SSH_KEY_SIGN, &st) == -1) {
 		error_f("not installed: %s", strerror(errno));
 		return -1;
 	}
 	if (fflush(stdout) != 0) {
 		error_f("fflush: %s", strerror(errno));
 		return -1;
 	}
 	if (pipe(to) == -1) {
 		error_f("pipe: %s", strerror(errno));
 		return -1;
 	}
 	if (pipe(from) == -1) {
 		error_f("pipe: %s", strerror(errno));
 		return -1;
 	}
 	if ((pid = fork()) == -1) {
 		error_f("fork: %s", strerror(errno));
 		return -1;
 	}
 	osigchld = ssh_signal(SIGCHLD, SIG_DFL);
 	if (pid == 0) {
 		close(from[0]);
 		if (dup2(from[1], STDOUT_FILENO) == -1)
 			fatal_f("dup2: %s", strerror(errno));
 		close(to[1]);
 		if (dup2(to[0], STDIN_FILENO) == -1)
 			fatal_f("dup2: %s", strerror(errno));
 		close(from[1]);
 		close(to[0]);
 
 		if (dup2(sock, STDERR_FILENO + 1) == -1)
 			fatal_f("dup2: %s", strerror(errno));
 		sock = STDERR_FILENO + 1;
 		if (fcntl(sock, F_SETFD, 0) == -1) /* keep the socket on exec */
 			debug3_f("fcntl F_SETFD: %s", strerror(errno));
 		closefrom(sock + 1);
 
 		debug3_f("[child] pid=%ld, exec %s",
 		    (long)getpid(), _PATH_SSH_KEY_SIGN);
 		execl(_PATH_SSH_KEY_SIGN, _PATH_SSH_KEY_SIGN, (char *)NULL);
 		fatal_f("exec(%s): %s", _PATH_SSH_KEY_SIGN,
 		    strerror(errno));
 	}
 	close(from[1]);
 	close(to[0]);
 	sock = STDERR_FILENO + 1;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	/* send # of sock, data to be signed */
 	if ((r = sshbuf_put_u32(b, sock)) != 0 ||
 	    (r = sshbuf_put_string(b, data, datalen)) != 0)
 		fatal_fr(r, "buffer error");
 	if (ssh_msg_send(to[1], version, b) == -1)
 		fatal_f("couldn't send request");
 	sshbuf_reset(b);
 	r = ssh_msg_recv(from[0], b);
 	close(from[0]);
 	close(to[1]);
 	if (r < 0) {
 		error_f("no reply");
 		goto fail;
 	}
 
 	errno = 0;
 	while (waitpid(pid, &status, 0) == -1) {
 		if (errno != EINTR) {
 			error_f("waitpid %ld: %s", (long)pid, strerror(errno));
 			goto fail;
 		}
 	}
 	if (!WIFEXITED(status)) {
 		error_f("exited abnormally");
 		goto fail;
 	}
 	if (WEXITSTATUS(status) != 0) {
 		error_f("exited with status %d", WEXITSTATUS(status));
 		goto fail;
 	}
 	if ((r = sshbuf_get_u8(b, &rversion)) != 0) {
 		error_fr(r, "buffer error");
 		goto fail;
 	}
 	if (rversion != version) {
 		error_f("bad version");
 		goto fail;
 	}
 	if ((r = sshbuf_get_string(b, sigp, lenp)) != 0) {
 		error_fr(r, "buffer error");
  fail:
 		ssh_signal(SIGCHLD, osigchld);
 		sshbuf_free(b);
 		return -1;
 	}
 	ssh_signal(SIGCHLD, osigchld);
 	sshbuf_free(b);
 
 	return 0;
 }
 
 static int
 userauth_hostbased(struct ssh *ssh)
 {
 	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	struct sshkey *private = NULL;
 	struct sshbuf *b = NULL;
 	u_char *sig = NULL, *keyblob = NULL;
 	char *fp = NULL, *chost = NULL, *lname = NULL;
 	size_t siglen = 0, keylen = 0;
 	int i, r, success = 0;
 
 	if (authctxt->ktypes == NULL) {
 		authctxt->oktypes = xstrdup(options.hostbased_accepted_algos);
 		authctxt->ktypes = authctxt->oktypes;
 	}
 
 	/*
 	 * Work through each listed type pattern in HostbasedAcceptedAlgorithms,
 	 * trying each hostkey that matches the type in turn.
 	 */
 	for (;;) {
 		if (authctxt->active_ktype == NULL)
 			authctxt->active_ktype = strsep(&authctxt->ktypes, ",");
 		if (authctxt->active_ktype == NULL ||
 		    *authctxt->active_ktype == '\0')
 			break;
 		debug3_f("trying key type %s", authctxt->active_ktype);
 
 		/* check for a useful key */
 		private = NULL;
 		for (i = 0; i < authctxt->sensitive->nkeys; i++) {
 			if (authctxt->sensitive->keys[i] == NULL ||
 			    authctxt->sensitive->keys[i]->type == KEY_UNSPEC)
 				continue;
 			if (!sshkey_match_keyname_to_sigalgs(
 			    sshkey_ssh_name(authctxt->sensitive->keys[i]),
 			    authctxt->active_ktype))
 				continue;
 			/* we take and free the key */
 			private = authctxt->sensitive->keys[i];
 			authctxt->sensitive->keys[i] = NULL;
 			break;
 		}
 		/* Found one */
 		if (private != NULL)
 			break;
 		/* No more keys of this type; advance */
 		authctxt->active_ktype = NULL;
 	}
 	if (private == NULL) {
 		free(authctxt->oktypes);
 		authctxt->oktypes = authctxt->ktypes = NULL;
 		authctxt->active_ktype = NULL;
 		debug("No more client hostkeys for hostbased authentication.");
 		goto out;
 	}
 
 	if ((fp = sshkey_fingerprint(private, options.fingerprint_hash,
 	    SSH_FP_DEFAULT)) == NULL) {
 		error_f("sshkey_fingerprint failed");
 		goto out;
 	}
 	debug_f("trying hostkey %s %s using sigalg %s",
 	    sshkey_ssh_name(private), fp, authctxt->active_ktype);
 
 	/* figure out a name for the client host */
 	lname = get_local_name(ssh_packet_get_connection_in(ssh));
 	if (lname == NULL) {
 		error_f("cannot get local ipaddr/name");
 		goto out;
 	}
 
 	/* XXX sshbuf_put_stringf? */
 	xasprintf(&chost, "%s.", lname);
 	debug2_f("chost %s", chost);
 
 	/* construct data */
 	if ((b = sshbuf_new()) == NULL) {
 		error_f("sshbuf_new failed");
 		goto out;
 	}
 	if ((r = sshkey_to_blob(private, &keyblob, &keylen)) != 0) {
 		error_fr(r, "sshkey_to_blob");
 		goto out;
 	}
 	if ((r = sshbuf_put_stringb(b, ssh->kex->session_id)) != 0 ||
 	    (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshbuf_put_cstring(b, authctxt->server_user)) != 0 ||
 	    (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||
 	    (r = sshbuf_put_cstring(b, authctxt->method->name)) != 0 ||
 	    (r = sshbuf_put_cstring(b, authctxt->active_ktype)) != 0 ||
 	    (r = sshbuf_put_string(b, keyblob, keylen)) != 0 ||
 	    (r = sshbuf_put_cstring(b, chost)) != 0 ||
 	    (r = sshbuf_put_cstring(b, authctxt->local_user)) != 0) {
 		error_fr(r, "buffer error");
 		goto out;
 	}
 
 #ifdef DEBUG_PK
 	sshbuf_dump(b, stderr);
 #endif
 	if ((r = ssh_keysign(ssh, private, &sig, &siglen,
 	    sshbuf_ptr(b), sshbuf_len(b))) != 0) {
 		error("sign using hostkey %s %s failed",
 		    sshkey_ssh_name(private), fp);
 		goto out;
 	}
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->active_ktype)) != 0 ||
 	    (r = sshpkt_put_string(ssh, keyblob, keylen)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, chost)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, authctxt->local_user)) != 0 ||
 	    (r = sshpkt_put_string(ssh, sig, siglen)) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0) {
 		error_fr(r, "packet error");
 		goto out;
 	}
 	success = 1;
 
  out:
 	if (sig != NULL)
 		freezero(sig, siglen);
 	free(keyblob);
 	free(lname);
 	free(fp);
 	free(chost);
 	sshkey_free(private);
 	sshbuf_free(b);
 
 	return success;
 }
 
 /* find auth method */
 
 /*
  * given auth method name, if configurable options permit this method fill
  * in auth_ident field and return true, otherwise return false.
  */
 static int
 authmethod_is_enabled(Authmethod *method)
 {
 	if (method == NULL)
 		return 0;
 	/* return false if options indicate this method is disabled */
 	if  (method->enabled == NULL || *method->enabled == 0)
 		return 0;
 	/* return false if batch mode is enabled but method needs interactive mode */
 	if  (method->batch_flag != NULL && *method->batch_flag != 0)
 		return 0;
 	return 1;
 }
 
 static Authmethod *
 authmethod_lookup(const char *name)
 {
 	Authmethod *method = NULL;
 	if (name != NULL)
 		for (method = authmethods; method->name != NULL; method++)
 			if (strcmp(name, method->name) == 0)
 				return method;
 	debug2("Unrecognized authentication method name: %s", name ? name : "NULL");
 	return NULL;
 }
 
 /* XXX internal state */
 static Authmethod *current = NULL;
 static char *supported = NULL;
 static char *preferred = NULL;
 
 /*
  * Given the authentication method list sent by the server, return the
  * next method we should try.  If the server initially sends a nil list,
  * use a built-in default list.
  */
 static Authmethod *
 authmethod_get(char *authlist)
 {
 	char *name = NULL;
 	u_int next;
 
 	/* Use a suitable default if we're passed a nil list.  */
 	if (authlist == NULL || strlen(authlist) == 0)
 		authlist = options.preferred_authentications;
 
 	if (supported == NULL || strcmp(authlist, supported) != 0) {
 		debug3("start over, passed a different list %s", authlist);
 		free(supported);
 		supported = xstrdup(authlist);
 		preferred = options.preferred_authentications;
 		debug3("preferred %s", preferred);
 		current = NULL;
 	} else if (current != NULL && authmethod_is_enabled(current))
 		return current;
 
 	for (;;) {
 		if ((name = match_list(preferred, supported, &next)) == NULL) {
 			debug("No more authentication methods to try.");
 			current = NULL;
 			return NULL;
 		}
 		preferred += next;
 		debug3("authmethod_lookup %s", name);
 		debug3("remaining preferred: %s", preferred);
 		if ((current = authmethod_lookup(name)) != NULL &&
 		    authmethod_is_enabled(current)) {
 			debug3("authmethod_is_enabled %s", name);
 			debug("Next authentication method: %s", name);
 			free(name);
 			return current;
 		}
 		free(name);
 	}
 }
 
 static char *
 authmethods_get(void)
 {
 	Authmethod *method = NULL;
 	struct sshbuf *b;
 	char *list;
 	int r;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	for (method = authmethods; method->name != NULL; method++) {
 		if (authmethod_is_enabled(method)) {
 			if ((r = sshbuf_putf(b, "%s%s",
 			    sshbuf_len(b) ? "," : "", method->name)) != 0)
 				fatal_fr(r, "buffer error");
 		}
 	}
 	if ((list = sshbuf_dup_string(b)) == NULL)
 		fatal_f("sshbuf_dup_string failed");
 	sshbuf_free(b);
 	return list;
 }
diff --git a/sshd.0 b/sshd.0
index 98855e8d129d..ef26622d5b9c 100644
--- a/sshd.0
+++ b/sshd.0
@@ -1,686 +1,686 @@
 SSHD(8)                     System Manager's Manual                    SSHD(8)
 
 NAME
      sshd M-bM-^@M-^S OpenSSH daemon
 
 SYNOPSIS
      sshd [-46DdeGiqTtV] [-C connection_spec] [-c host_certificate_file]
           [-E log_file] [-f config_file] [-g login_grace_time]
           [-h host_key_file] [-o option] [-p port] [-u len]
 
 DESCRIPTION
      sshd (OpenSSH Daemon) is the daemon program for ssh(1).  It provides
      secure encrypted communications between two untrusted hosts over an
      insecure network.
 
      sshd listens for connections from clients.  It is normally started at
      boot from /etc/rc.  It forks a new daemon for each incoming connection.
      The forked daemons handle key exchange, encryption, authentication,
      command execution, and data exchange.
 
      sshd can be configured using command-line options or a configuration file
      (by default sshd_config(5)); command-line options override values
      specified in the configuration file.  sshd rereads its configuration file
      when it receives a hangup signal, SIGHUP, by executing itself with the
      name and options it was started with, e.g. /usr/sbin/sshd.
 
      The options are as follows:
 
      -4      Forces sshd to use IPv4 addresses only.
 
      -6      Forces sshd to use IPv6 addresses only.
 
      -C connection_spec
              Specify the connection parameters to use for the -T extended test
              mode.  If provided, any Match directives in the configuration
              file that would apply are applied before the configuration is
              written to standard output.  The connection parameters are
              supplied as keyword=value pairs and may be supplied in any order,
              either with multiple -C options or as a comma-separated list.
              The keywords are M-bM-^@M-^\addrM-bM-^@M-^], M-bM-^@M-^\userM-bM-^@M-^], M-bM-^@M-^\hostM-bM-^@M-^], M-bM-^@M-^\laddrM-bM-^@M-^], M-bM-^@M-^\lportM-bM-^@M-^], and
              M-bM-^@M-^\rdomainM-bM-^@M-^] and correspond to source address, user, resolved source
              host name, local address, local port number and routing domain
              respectively.
 
      -c host_certificate_file
              Specifies a path to a certificate file to identify sshd during
              key exchange.  The certificate file must match a host key file
              specified using the -h option or the HostKey configuration
              directive.
 
      -D      When this option is specified, sshd will not detach and does not
              become a daemon.  This allows easy monitoring of sshd.
 
      -d      Debug mode.  The server sends verbose debug output to standard
              error, and does not put itself in the background.  The server
              also will not fork(2) and will only process one connection.  This
              option is only intended for debugging for the server.  Multiple
              -d options increase the debugging level.  Maximum is 3.
 
      -E log_file
              Append debug logs to log_file instead of the system log.
 
      -e      Write debug logs to standard error instead of the system log.
 
      -f config_file
              Specifies the name of the configuration file.  The default is
              /etc/ssh/sshd_config.  sshd refuses to start if there is no
              configuration file.
 
      -G      Parse and print configuration file.  Check the validity of the
              configuration file, output the effective configuration to stdout
              and then exit.  Optionally, Match rules may be applied by
              specifying the connection parameters using one or more -C
              options.
 
      -g login_grace_time
              Gives the grace time for clients to authenticate themselves
              (default 120 seconds).  If the client fails to authenticate the
              user within this many seconds, the server disconnects and exits.
              A value of zero indicates no limit.
 
      -h host_key_file
              Specifies a file from which a host key is read.  This option must
              be given if sshd is not run as root (as the normal host key files
              are normally not readable by anyone but root).  The default is
              /etc/ssh/ssh_host_ecdsa_key, /etc/ssh/ssh_host_ed25519_key and
              /etc/ssh/ssh_host_rsa_key.  It is possible to have multiple host
              key files for the different host key algorithms.
 
      -i      Specifies that sshd is being run from inetd(8).
 
      -o option
              Can be used to give options in the format used in the
              configuration file.  This is useful for specifying options for
              which there is no separate command-line flag.  For full details
              of the options, and their values, see sshd_config(5).
 
      -p port
              Specifies the port on which the server listens for connections
              (default 22).  Multiple port options are permitted.  Ports
              specified in the configuration file with the Port option are
              ignored when a command-line port is specified.  Ports specified
              using the ListenAddress option override command-line ports.
 
      -q      Quiet mode.  Nothing is sent to the system log.  Normally the
              beginning, authentication, and termination of each connection is
              logged.
 
      -T      Extended test mode.  Check the validity of the configuration
              file, output the effective configuration to stdout and then exit.
              Optionally, Match rules may be applied by specifying the
              connection parameters using one or more -C options.  This is
              similar to the -G flag, but it includes the additional testing
              performed by the -t flag.
 
      -t      Test mode.  Only check the validity of the configuration file and
              sanity of the keys.  This is useful for updating sshd reliably as
              configuration options may change.
 
      -u len  This option is used to specify the size of the field in the utmp
              structure that holds the remote host name.  If the resolved host
              name is longer than len, the dotted decimal value will be used
              instead.  This allows hosts with very long host names that
              overflow this field to still be uniquely identified.  Specifying
              -u0 indicates that only dotted decimal addresses should be put
              into the utmp file.  -u0 may also be used to prevent sshd from
              making DNS requests unless the authentication mechanism or
              configuration requires it.  Authentication mechanisms that may
              require DNS include HostbasedAuthentication and using a
              from="pattern-list" option in a key file.  Configuration options
              that require DNS include using a USER@HOST pattern in AllowUsers
              or DenyUsers.
 
      -V      Display the version number and exit.
 
 AUTHENTICATION
      The OpenSSH SSH daemon supports SSH protocol 2 only.  Each host has a
      host-specific key, used to identify the host.  Whenever a client
      connects, the daemon responds with its public host key.  The client
      compares the host key against its own database to verify that it has not
      changed.  Forward secrecy is provided through a Diffie-Hellman key
      agreement.  This key agreement results in a shared session key.  The rest
      of the session is encrypted using a symmetric cipher.  The client selects
      the encryption algorithm to use from those offered by the server.
      Additionally, session integrity is provided through a cryptographic
      message authentication code (MAC).
 
      Finally, the server and the client enter an authentication dialog.  The
      client tries to authenticate itself using host-based authentication,
      public key authentication, challenge-response authentication, or password
      authentication.
 
      Regardless of the authentication type, the account is checked to ensure
      that it is accessible.  An account is not accessible if it is locked,
      listed in DenyUsers or its group is listed in DenyGroups .  The
      definition of a locked account is system dependent. Some platforms have
      their own account database (eg AIX) and some modify the passwd field (
      M-bM-^@M-^X*LK*M-bM-^@M-^Y on Solaris and UnixWare, M-bM-^@M-^X*M-bM-^@M-^Y on HP-UX, containing M-bM-^@M-^XNologinM-bM-^@M-^Y on
      Tru64, a leading M-bM-^@M-^X*LOCKED*M-bM-^@M-^Y on FreeBSD and a leading M-bM-^@M-^X!M-bM-^@M-^Y on most
      Linuxes).  If there is a requirement to disable password authentication
      for the account while allowing still public-key, then the passwd field
      should be set to something other than these values (eg M-bM-^@M-^XNPM-bM-^@M-^Y or M-bM-^@M-^X*NP*M-bM-^@M-^Y ).
 
      If the client successfully authenticates itself, a dialog for preparing
      the session is entered.  At this time the client may request things like
      allocating a pseudo-tty, forwarding X11 connections, forwarding TCP
      connections, or forwarding the authentication agent connection over the
      secure channel.
 
      After this, the client either requests an interactive shell or execution
      of a non-interactive command, which sshd will execute via the user's
      shell using its -c option.  The sides then enter session mode.  In this
      mode, either side may send data at any time, and such data is forwarded
      to/from the shell or command on the server side, and the user terminal in
      the client side.
 
      When the user program terminates and all forwarded X11 and other
      connections have been closed, the server sends command exit status to the
      client, and both sides exit.
 
 LOGIN PROCESS
      When a user successfully logs in, sshd does the following:
 
            1.   If the login is on a tty, and no command has been specified,
                 prints last login time and /etc/motd (unless prevented in the
                 configuration file or by ~/.hushlogin; see the FILES section).
 
            2.   If the login is on a tty, records login time.
 
            3.   Checks /etc/nologin; if it exists, prints contents and quits
                 (unless root).
 
            4.   Changes to run with normal user privileges.
 
            5.   Sets up basic environment.
 
            6.   Reads the file ~/.ssh/environment, if it exists, and users are
                 allowed to change their environment.  See the
                 PermitUserEnvironment option in sshd_config(5).
 
            7.   Changes to user's home directory.
 
            8.   If ~/.ssh/rc exists and the sshd_config(5) PermitUserRC option
                 is set, runs it; else if /etc/ssh/sshrc exists, runs it;
                 otherwise runs xauth(1).  The M-bM-^@M-^\rcM-bM-^@M-^] files are given the X11
                 authentication protocol and cookie in standard input.  See
                 SSHRC, below.
 
            9.   Runs user's shell or command.  All commands are run under the
                 user's login shell as specified in the system password
                 database.
 
 SSHRC
      If the file ~/.ssh/rc exists, sh(1) runs it after reading the environment
      files but before starting the user's shell or command.  It must not
      produce any output on stdout; stderr must be used instead.  If X11
      forwarding is in use, it will receive the "proto cookie" pair in its
      standard input (and DISPLAY in its environment).  The script must call
      xauth(1) because sshd will not run xauth automatically to add X11
      cookies.
 
      The primary purpose of this file is to run any initialization routines
      which may be needed before the user's home directory becomes accessible;
      AFS is a particular example of such an environment.
 
      This file will probably contain some initialization code followed by
      something similar to:
 
         if read proto cookie && [ -n "$DISPLAY" ]; then
                 if [ `echo $DISPLAY | cut -c1-10` = 'localhost:' ]; then
                         # X11UseLocalhost=yes
                         echo add unix:`echo $DISPLAY |
                             cut -c11-` $proto $cookie
                 else
                         # X11UseLocalhost=no
                         echo add $DISPLAY $proto $cookie
                 fi | xauth -q -
         fi
 
      If this file does not exist, /etc/ssh/sshrc is run, and if that does not
      exist either, xauth is used to add the cookie.
 
 AUTHORIZED_KEYS FILE FORMAT
      AuthorizedKeysFile specifies the files containing public keys for public
      key authentication; if this option is not specified, the default is
      ~/.ssh/authorized_keys and ~/.ssh/authorized_keys2.  Each line of the
      file contains one key (empty lines and lines starting with a M-bM-^@M-^X#M-bM-^@M-^Y are
      ignored as comments).  Public keys consist of the following space-
      separated fields: options, keytype, base64-encoded key, comment.  The
      options field is optional.  The supported key types are:
 
            sk-ecdsa-sha2-nistp256@openssh.com
            ecdsa-sha2-nistp256
            ecdsa-sha2-nistp384
            ecdsa-sha2-nistp521
            sk-ssh-ed25519@openssh.com
            ssh-ed25519
            ssh-dss
            ssh-rsa
 
      The comment field is not used for anything (but may be convenient for the
      user to identify the key).
 
      Note that lines in this file can be several hundred bytes long (because
      of the size of the public key encoding) up to a limit of 8 kilobytes,
      which permits RSA keys up to 16 kilobits.  You don't want to type them
      in; instead, copy the id_dsa.pub, id_ecdsa.pub, id_ecdsa_sk.pub,
      id_ed25519.pub, id_ed25519_sk.pub, or the id_rsa.pub file and edit it.
 
      sshd enforces a minimum RSA key modulus size of 1024 bits.
 
      The options (if present) consist of comma-separated option
      specifications.  No spaces are permitted, except within double quotes.
      The following option specifications are supported (note that option
      keywords are case-insensitive):
 
      agent-forwarding
              Enable authentication agent forwarding previously disabled by the
              restrict option.
 
      cert-authority
              Specifies that the listed key is a certification authority (CA)
              that is trusted to validate signed certificates for user
              authentication.
 
              Certificates may encode access restrictions similar to these key
              options.  If both certificate restrictions and key options are
              present, the most restrictive union of the two is applied.
 
      command="command"
              Specifies that the command is executed whenever this key is used
              for authentication.  The command supplied by the user (if any) is
              ignored.  The command is run on a pty if the client requests a
              pty; otherwise it is run without a tty.  If an 8-bit clean
              channel is required, one must not request a pty or should specify
              no-pty.  A quote may be included in the command by quoting it
              with a backslash.
 
              This option might be useful to restrict certain public keys to
              perform just a specific operation.  An example might be a key
              that permits remote backups but nothing else.  Note that the
              client may specify TCP and/or X11 forwarding unless they are
              explicitly prohibited, e.g. using the restrict key option.
 
              The command originally supplied by the client is available in the
              SSH_ORIGINAL_COMMAND environment variable.  Note that this option
              applies to shell, command or subsystem execution.  Also note that
              this command may be superseded by a sshd_config(5) ForceCommand
              directive.
 
              If a command is specified and a forced-command is embedded in a
              certificate used for authentication, then the certificate will be
              accepted only if the two commands are identical.
 
      environment="NAME=value"
              Specifies that the string is to be added to the environment when
              logging in using this key.  Environment variables set this way
              override other default environment values.  Multiple options of
              this type are permitted.  Environment processing is disabled by
              default and is controlled via the PermitUserEnvironment option.
 
      expiry-time="timespec"
              Specifies a time after which the key will not be accepted.  The
              time may be specified as a YYYYMMDD[Z] date or a
              YYYYMMDDHHMM[SS][Z] time.  Dates and times will be interpreted in
              the system time zone unless suffixed by a Z character, in which
              case they will be interpreted in the UTC time zone.
 
      from="pattern-list"
              Specifies that in addition to public key authentication, either
              the canonical name of the remote host or its IP address must be
              present in the comma-separated list of patterns.  See PATTERNS in
              ssh_config(5) for more information on patterns.
 
              In addition to the wildcard matching that may be applied to
              hostnames or addresses, a from stanza may match IP addresses
              using CIDR address/masklen notation.
 
              The purpose of this option is to optionally increase security:
              public key authentication by itself does not trust the network or
              name servers or anything (but the key); however, if somebody
              somehow steals the key, the key permits an intruder to log in
              from anywhere in the world.  This additional option makes using a
              stolen key more difficult (name servers and/or routers would have
              to be compromised in addition to just the key).
 
      no-agent-forwarding
              Forbids authentication agent forwarding when this key is used for
              authentication.
 
      no-port-forwarding
              Forbids TCP forwarding when this key is used for authentication.
              Any port forward requests by the client will return an error.
              This might be used, e.g. in connection with the command option.
 
      no-pty  Prevents tty allocation (a request to allocate a pty will fail).
 
      no-user-rc
              Disables execution of ~/.ssh/rc.
 
      no-X11-forwarding
              Forbids X11 forwarding when this key is used for authentication.
              Any X11 forward requests by the client will return an error.
 
      permitlisten="[host:]port"
              Limit remote port forwarding with the ssh(1) -R option such that
              it may only listen on the specified host (optional) and port.
              IPv6 addresses can be specified by enclosing the address in
              square brackets.  Multiple permitlisten options may be applied
              separated by commas.  Hostnames may include wildcards as
              described in the PATTERNS section in ssh_config(5).  A port
              specification of * matches any port.  Note that the setting of
              GatewayPorts may further restrict listen addresses.  Note that
              ssh(1) will send a hostname of M-bM-^@M-^\localhostM-bM-^@M-^] if a listen host was
              not specified when the forwarding was requested, and that this
              name is treated differently to the explicit localhost addresses
              M-bM-^@M-^\127.0.0.1M-bM-^@M-^] and M-bM-^@M-^\::1M-bM-^@M-^].
 
      permitopen="host:port"
              Limit local port forwarding with the ssh(1) -L option such that
              it may only connect to the specified host and port.  IPv6
              addresses can be specified by enclosing the address in square
              brackets.  Multiple permitopen options may be applied separated
              by commas.  No pattern matching or name lookup is performed on
              the specified hostnames, they must be literal host names and/or
              addresses.  A port specification of * matches any port.
 
      port-forwarding
              Enable port forwarding previously disabled by the restrict
              option.
 
      principals="principals"
              On a cert-authority line, specifies allowed principals for
              certificate authentication as a comma-separated list.  At least
              one name from the list must appear in the certificate's list of
              principals for the certificate to be accepted.  This option is
              ignored for keys that are not marked as trusted certificate
              signers using the cert-authority option.
 
      pty     Permits tty allocation previously disabled by the restrict
              option.
 
      no-touch-required
              Do not require demonstration of user presence for signatures made
              using this key.  This option only makes sense for the FIDO
              authenticator algorithms ecdsa-sk and ed25519-sk.
 
      verify-required
              Require that signatures made using this key attest that they
              verified the user, e.g. via a PIN.  This option only makes sense
              for the FIDO authenticator algorithms ecdsa-sk and ed25519-sk.
 
      restrict
              Enable all restrictions, i.e. disable port, agent and X11
              forwarding, as well as disabling PTY allocation and execution of
              ~/.ssh/rc.  If any future restriction capabilities are added to
              authorized_keys files, they will be included in this set.
 
      tunnel="n"
              Force a tun(4) device on the server.  Without this option, the
              next available device will be used if the client requests a
              tunnel.
 
      user-rc
              Enables execution of ~/.ssh/rc previously disabled by the
              restrict option.
 
      X11-forwarding
              Permits X11 forwarding previously disabled by the restrict
              option.
 
      An example authorized_keys file:
 
         # Comments are allowed at start of line. Blank lines are allowed.
         # Plain key, no restrictions
         ssh-rsa ...
         # Forced command, disable PTY and all forwarding
         restrict,command="dump /home" ssh-rsa ...
         # Restriction of ssh -L forwarding destinations
         permitopen="192.0.2.1:80",permitopen="192.0.2.2:25" ssh-rsa ...
         # Restriction of ssh -R forwarding listeners
         permitlisten="localhost:8080",permitlisten="[::1]:22000" ssh-rsa ...
         # Configuration for tunnel forwarding
         tunnel="0",command="sh /etc/netstart tun0" ssh-rsa ...
         # Override of restriction to allow PTY allocation
         restrict,pty,command="nethack" ssh-rsa ...
         # Allow FIDO key without requiring touch
         no-touch-required sk-ecdsa-sha2-nistp256@openssh.com ...
         # Require user-verification (e.g. PIN or biometric) for FIDO key
         verify-required sk-ecdsa-sha2-nistp256@openssh.com ...
         # Trust CA key, allow touch-less FIDO if requested in certificate
         cert-authority,no-touch-required,principals="user_a" ssh-rsa ...
 
 SSH_KNOWN_HOSTS FILE FORMAT
      The /etc/ssh/ssh_known_hosts and ~/.ssh/known_hosts files contain host
      public keys for all known hosts.  The global file should be prepared by
      the administrator (optional), and the per-user file is maintained
      automatically: whenever the user connects to an unknown host, its key is
      added to the per-user file.
 
      Each line in these files contains the following fields: marker
      (optional), hostnames, keytype, base64-encoded key, comment.  The fields
      are separated by spaces.
 
      The marker is optional, but if it is present then it must be one of
      M-bM-^@M-^\@cert-authorityM-bM-^@M-^], to indicate that the line contains a certification
      authority (CA) key, or M-bM-^@M-^\@revokedM-bM-^@M-^], to indicate that the key contained on
      the line is revoked and must not ever be accepted.  Only one marker
      should be used on a key line.
 
      Hostnames is a comma-separated list of patterns (M-bM-^@M-^X*M-bM-^@M-^Y and M-bM-^@M-^X?M-bM-^@M-^Y act as
      wildcards); each pattern in turn is matched against the host name.  When
      sshd is authenticating a client, such as when using
      HostbasedAuthentication, this will be the canonical client host name.
      When ssh(1) is authenticating a server, this will be the host name given
      by the user, the value of the ssh(1) HostkeyAlias if it was specified, or
      the canonical server hostname if the ssh(1) CanonicalizeHostname option
      was used.
 
      A pattern may also be preceded by M-bM-^@M-^X!M-bM-^@M-^Y to indicate negation: if the host
      name matches a negated pattern, it is not accepted (by that line) even if
      it matched another pattern on the line.  A hostname or address may
      optionally be enclosed within M-bM-^@M-^X[M-bM-^@M-^Y and M-bM-^@M-^X]M-bM-^@M-^Y brackets then followed by M-bM-^@M-^X:M-bM-^@M-^Y
      and a non-standard port number.
 
      Alternately, hostnames may be stored in a hashed form which hides host
      names and addresses should the file's contents be disclosed.  Hashed
      hostnames start with a M-bM-^@M-^X|M-bM-^@M-^Y character.  Only one hashed hostname may
      appear on a single line and none of the above negation or wildcard
      operators may be applied.
 
      The keytype and base64-encoded key are taken directly from the host key;
      they can be obtained, for example, from /etc/ssh/ssh_host_rsa_key.pub.
      The optional comment field continues to the end of the line, and is not
      used.
 
      Lines starting with M-bM-^@M-^X#M-bM-^@M-^Y and empty lines are ignored as comments.
 
      When performing host authentication, authentication is accepted if any
      matching line has the proper key; either one that matches exactly or, if
      the server has presented a certificate for authentication, the key of the
      certification authority that signed the certificate.  For a key to be
      trusted as a certification authority, it must use the M-bM-^@M-^\@cert-authorityM-bM-^@M-^]
      marker described above.
 
      The known hosts file also provides a facility to mark keys as revoked,
      for example when it is known that the associated private key has been
      stolen.  Revoked keys are specified by including the M-bM-^@M-^\@revokedM-bM-^@M-^] marker at
      the beginning of the key line, and are never accepted for authentication
      or as certification authorities, but instead will produce a warning from
      ssh(1) when they are encountered.
 
      It is permissible (but not recommended) to have several lines or
      different host keys for the same names.  This will inevitably happen when
      short forms of host names from different domains are put in the file.  It
      is possible that the files contain conflicting information;
      authentication is accepted if valid information can be found from either
      file.
 
      Note that the lines in these files are typically hundreds of characters
      long, and you definitely don't want to type in the host keys by hand.
      Rather, generate them by a script, ssh-keyscan(1) or by taking, for
      example, /etc/ssh/ssh_host_rsa_key.pub and adding the host names at the
      front.  ssh-keygen(1) also offers some basic automated editing for
      ~/.ssh/known_hosts including removing hosts matching a host name and
      converting all host names to their hashed representations.
 
      An example ssh_known_hosts file:
 
         # Comments allowed at start of line
         cvs.example.net,192.0.2.10 ssh-rsa AAAA1234.....=
         # A hashed hostname
         |1|JfKTdBh7rNbXkVAQCRp4OQoPfmI=|USECr3SWf1JUPsms5AqfD5QfxkM= ssh-rsa
         AAAA1234.....=
         # A revoked key
         @revoked * ssh-rsa AAAAB5W...
         # A CA key, accepted for any host in *.mydomain.com or *.mydomain.org
         @cert-authority *.mydomain.org,*.mydomain.com ssh-rsa AAAAB5W...
 
 FILES
      ~/.hushlogin
              This file is used to suppress printing the last login time and
              /etc/motd, if PrintLastLog and PrintMotd, respectively, are
              enabled.  It does not suppress printing of the banner specified
              by Banner.
 
      ~/.rhosts
              This file is used for host-based authentication (see ssh(1) for
              more information).  On some machines this file may need to be
              world-readable if the user's home directory is on an NFS
              partition, because sshd reads it as root.  Additionally, this
              file must be owned by the user, and must not have write
              permissions for anyone else.  The recommended permission for most
              machines is read/write for the user, and not accessible by
              others.
 
      ~/.shosts
              This file is used in exactly the same way as .rhosts, but allows
              host-based authentication without permitting login with
              rlogin/rsh.
 
      ~/.ssh/
              This directory is the default location for all user-specific
              configuration and authentication information.  There is no
              general requirement to keep the entire contents of this directory
              secret, but the recommended permissions are read/write/execute
              for the user, and not accessible by others.
 
      ~/.ssh/authorized_keys
              Lists the public keys (DSA, ECDSA, Ed25519, RSA) that can be used
              for logging in as this user.  The format of this file is
              described above.  The content of the file is not highly
              sensitive, but the recommended permissions are read/write for the
              user, and not accessible by others.
 
              If this file, the ~/.ssh directory, or the user's home directory
              are writable by other users, then the file could be modified or
              replaced by unauthorized users.  In this case, sshd will not
              allow it to be used unless the StrictModes option has been set to
              M-bM-^@M-^\noM-bM-^@M-^].
 
      ~/.ssh/environment
              This file is read into the environment at login (if it exists).
              It can only contain empty lines, comment lines (that start with
              M-bM-^@M-^X#M-bM-^@M-^Y), and assignment lines of the form name=value.  The file
              should be writable only by the user; it need not be readable by
              anyone else.  Environment processing is disabled by default and
              is controlled via the PermitUserEnvironment option.
 
      ~/.ssh/known_hosts
              Contains a list of host keys for all hosts the user has logged
              into that are not already in the systemwide list of known host
              keys.  The format of this file is described above.  This file
              should be writable only by root/the owner and can, but need not
              be, world-readable.
 
      ~/.ssh/rc
              Contains initialization routines to be run before the user's home
              directory becomes accessible.  This file should be writable only
              by the user, and need not be readable by anyone else.
 
      /etc/hosts.equiv
              This file is for host-based authentication (see ssh(1)).  It
              should only be writable by root.
 
      /etc/moduli
              Contains Diffie-Hellman groups used for the "Diffie-Hellman Group
              Exchange" key exchange method.  The file format is described in
              moduli(5).  If no usable groups are found in this file then fixed
              internal groups will be used.
 
      /etc/motd
              See motd(5).
 
      /etc/nologin
              If this file exists, sshd refuses to let anyone except root log
              in.  The contents of the file are displayed to anyone trying to
              log in, and non-root connections are refused.  The file should be
              world-readable.
 
      /etc/shosts.equiv
              This file is used in exactly the same way as hosts.equiv, but
              allows host-based authentication without permitting login with
              rlogin/rsh.
 
      /etc/ssh/ssh_host_ecdsa_key
      /etc/ssh/ssh_host_ed25519_key
      /etc/ssh/ssh_host_rsa_key
              These files contain the private parts of the host keys.  These
              files should only be owned by root, readable only by root, and
              not accessible to others.  Note that sshd does not start if these
              files are group/world-accessible.
 
      /etc/ssh/ssh_host_ecdsa_key.pub
      /etc/ssh/ssh_host_ed25519_key.pub
      /etc/ssh/ssh_host_rsa_key.pub
              These files contain the public parts of the host keys.  These
              files should be world-readable but writable only by root.  Their
              contents should match the respective private parts.  These files
              are not really used for anything; they are provided for the
              convenience of the user so their contents can be copied to known
              hosts files.  These files are created using ssh-keygen(1).
 
      /etc/ssh/ssh_known_hosts
              Systemwide list of known host keys.  This file should be prepared
              by the system administrator to contain the public host keys of
              all machines in the organization.  The format of this file is
              described above.  This file should be writable only by root/the
              owner and should be world-readable.
 
      /etc/ssh/sshd_config
              Contains configuration data for sshd.  The file format and
              configuration options are described in sshd_config(5).
 
      /etc/ssh/sshrc
              Similar to ~/.ssh/rc, it can be used to specify machine-specific
              login-time initializations globally.  This file should be
              writable only by root, and should be world-readable.
 
      /var/empty
              chroot(2) directory used by sshd during privilege separation in
              the pre-authentication phase.  The directory should not contain
              any files and must be owned by root and not group or world-
              writable.
 
      /var/run/sshd.pid
              Contains the process ID of the sshd listening for connections (if
              there are several daemons running concurrently for different
              ports, this contains the process ID of the one started last).
              The content of this file is not sensitive; it can be world-
              readable.
 
 SEE ALSO
      scp(1), sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1),
      ssh-keyscan(1), chroot(2), login.conf(5), moduli(5), sshd_config(5),
      inetd(8), sftp-server(8)
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.  Niels Provos and Markus Friedl contributed support
      for privilege separation.
 
-OpenBSD 7.3                   September 19, 2023                   OpenBSD 7.3
+OpenBSD 7.5                   September 19, 2023                   OpenBSD 7.5
diff --git a/sshd.c b/sshd.c
index 9cbe92293371..b4f2b9742f39 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,2466 +1,2466 @@
-/* $OpenBSD: sshd.c,v 1.601 2023/12/18 14:45:49 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.602 2024/01/08 00:34:34 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
  * This program is the ssh daemon.  It listens for connections from clients,
  * and performs authentication, executes use commands or shell, and forwards
  * information to/from the application to the user client over an encrypted
  * connection.  This can also handle forwarding of X11, TCP/IP, and
  * authentication agent connections.
  *
  * As far as I am concerned, the code I have written for this software
  * can be used freely for any purpose.  Any derived versions of this
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
  *
  * SSH2 implementation:
  * Privilege Separation:
  *
  * Copyright (c) 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  * Copyright (c) 2002 Niels Provos.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>
 #endif
 #include "openbsd-compat/sys-tree.h"
 #include "openbsd-compat/sys-queue.h"
 #include <sys/wait.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #ifdef HAVE_PATHS_H
 #include <paths.h>
 #endif
 #include <grp.h>
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <pwd.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/dh.h>
 #include <openssl/bn.h>
 #include <openssl/rand.h>
 #include "openbsd-compat/openssl-compat.h"
 #endif
 
 #ifdef HAVE_SECUREWARE
 #include <sys/security.h>
 #include <prot.h>
 #endif
 
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
 #include "sshpty.h"
 #include "packet.h"
 #include "log.h"
 #include "sshbuf.h"
 #include "misc.h"
 #include "match.h"
 #include "servconf.h"
 #include "uidswap.h"
 #include "compat.h"
 #include "cipher.h"
 #include "digest.h"
 #include "sshkey.h"
 #include "kex.h"
 #include "authfile.h"
 #include "pathnames.h"
 #include "atomicio.h"
 #include "canohost.h"
 #include "hostfile.h"
 #include "auth.h"
 #include "authfd.h"
 #include "msg.h"
 #include "dispatch.h"
 #include "channels.h"
 #include "session.h"
 #include "monitor.h"
 #ifdef GSSAPI
 #include "ssh-gss.h"
 #endif
 #include "monitor_wrap.h"
 #include "ssh-sandbox.h"
 #include "auth-options.h"
 #include "version.h"
 #include "ssherr.h"
 #include "sk-api.h"
 #include "srclimit.h"
 #include "dh.h"
 
 /* Re-exec fds */
 #define REEXEC_DEVCRYPTO_RESERVED_FD	(STDERR_FILENO + 1)
 #define REEXEC_STARTUP_PIPE_FD		(STDERR_FILENO + 2)
 #define REEXEC_CONFIG_PASS_FD		(STDERR_FILENO + 3)
 #define REEXEC_MIN_FREE_FD		(STDERR_FILENO + 4)
 
 extern char *__progname;
 
 /* Server configuration options. */
 ServerOptions options;
 
 /* Name of the server configuration file. */
 char *config_file_name = _PATH_SERVER_CONFIG_FILE;
 
 /*
  * Debug mode flag.  This can be set on the command line.  If debug
  * mode is enabled, extra debugging output will be sent to the system
  * log, the daemon will not go to background, and will exit after processing
  * the first connection.
  */
 int debug_flag = 0;
 
 /*
  * Indicating that the daemon should only test the configuration and keys.
  * If test_flag > 1 ("-T" flag), then sshd will also dump the effective
  * configuration, optionally using connection information provided by the
  * "-C" flag.
  */
 static int test_flag = 0;
 
 /* Flag indicating that the daemon is being started from inetd. */
 static int inetd_flag = 0;
 
 /* Flag indicating that sshd should not detach and become a daemon. */
 static int no_daemon_flag = 0;
 
 /* debug goes to stderr unless inetd_flag is set */
 static int log_stderr = 0;
 
 /* Saved arguments to main(). */
 static char **saved_argv;
 static int saved_argc;
 
 /* re-exec */
 static int rexeced_flag = 0;
 static int rexec_flag = 1;
 static int rexec_argc = 0;
 static char **rexec_argv;
 
 /*
  * The sockets that the server is listening; this is used in the SIGHUP
  * signal handler.
  */
 #define	MAX_LISTEN_SOCKS	16
 static int listen_socks[MAX_LISTEN_SOCKS];
 static int num_listen_socks = 0;
 
 /* Daemon's agent connection */
 int auth_sock = -1;
 static int have_agent = 0;
 
 /*
  * Any really sensitive data in the application is contained in this
  * structure. The idea is that this structure could be locked into memory so
  * that the pages do not get written into swap.  However, there are some
  * problems. The private key contains BIGNUMs, and we do not (in principle)
  * have access to the internals of them, and locking just the structure is
  * not very useful.  Currently, memory locking is not implemented.
  */
 struct {
 	struct sshkey	**host_keys;		/* all private host keys */
 	struct sshkey	**host_pubkeys;		/* all public host keys */
 	struct sshkey	**host_certificates;	/* all public host certificates */
 	int		have_ssh2_key;
 } sensitive_data;
 
 /* This is set to true when a signal is received. */
 static volatile sig_atomic_t received_sighup = 0;
 static volatile sig_atomic_t received_sigterm = 0;
 
 /* record remote hostname or ip */
 u_int utmp_len = HOST_NAME_MAX+1;
 
 /*
  * startup_pipes/flags are used for tracking children of the listening sshd
  * process early in their lifespans. This tracking is needed for three things:
  *
  * 1) Implementing the MaxStartups limit of concurrent unauthenticated
  *    connections.
  * 2) Avoiding a race condition for SIGHUP processing, where child processes
  *    may have listen_socks open that could collide with main listener process
  *    after it restarts.
  * 3) Ensuring that rexec'd sshd processes have received their initial state
  *    from the parent listen process before handling SIGHUP.
  *
  * Child processes signal that they have completed closure of the listen_socks
  * and (if applicable) received their rexec state by sending a char over their
  * sock. Child processes signal that authentication has completed by closing
  * the sock (or by exiting).
  */
 static int *startup_pipes = NULL;
 static int *startup_flags = NULL;	/* Indicates child closed listener */
 static int startup_pipe = -1;		/* in child */
 
 /* variables used for privilege separation */
 int use_privsep = -1;
 struct monitor *pmonitor = NULL;
 int privsep_is_preauth = 1;
 static int privsep_chroot = 1;
 
 /* global connection state and authentication contexts */
 Authctxt *the_authctxt = NULL;
 struct ssh *the_active_state;
 
 /* global key/cert auth options. XXX move to permanent ssh->authctxt? */
 struct sshauthopt *auth_opts = NULL;
 
 /* sshd_config buffer */
 struct sshbuf *cfg;
 
 /* Included files from the configuration file */
 struct include_list includes = TAILQ_HEAD_INITIALIZER(includes);
 
 /* message to be displayed after login */
 struct sshbuf *loginmsg;
 
 /* Unprivileged user */
 struct passwd *privsep_pw = NULL;
 
 /* Prototypes for various functions defined later in this file. */
 void destroy_sensitive_data(void);
 void demote_sensitive_data(void);
 static void do_ssh2_kex(struct ssh *);
 
 static char *listener_proctitle;
 
 /*
  * Close all listening sockets
  */
 static void
 close_listen_socks(void)
 {
 	int i;
 
 	for (i = 0; i < num_listen_socks; i++)
 		close(listen_socks[i]);
 	num_listen_socks = 0;
 }
 
 static void
 close_startup_pipes(void)
 {
 	int i;
 
 	if (startup_pipes)
 		for (i = 0; i < options.max_startups; i++)
 			if (startup_pipes[i] != -1)
 				close(startup_pipes[i]);
 }
 
 /*
  * Signal handler for SIGHUP.  Sshd execs itself when it receives SIGHUP;
  * the effect is to reread the configuration file (and to regenerate
  * the server key).
  */
 
 static void
 sighup_handler(int sig)
 {
 	received_sighup = 1;
 }
 
 /*
  * Called from the main program after receiving SIGHUP.
  * Restarts the server.
  */
 static void
 sighup_restart(void)
 {
 	logit("Received SIGHUP; restarting.");
 	if (options.pid_file != NULL)
 		unlink(options.pid_file);
 	platform_pre_restart();
 	close_listen_socks();
 	close_startup_pipes();
 	ssh_signal(SIGHUP, SIG_IGN); /* will be restored after exec */
 	execv(saved_argv[0], saved_argv);
 	logit("RESTART FAILED: av[0]='%.100s', error: %.100s.", saved_argv[0],
 	    strerror(errno));
 	exit(1);
 }
 
 /*
  * Generic signal handler for terminating signals in the master daemon.
  */
 static void
 sigterm_handler(int sig)
 {
 	received_sigterm = sig;
 }
 
 /*
  * SIGCHLD handler.  This is called whenever a child dies.  This will then
  * reap any zombies left by exited children.
  */
 static void
 main_sigchld_handler(int sig)
 {
 	int save_errno = errno;
 	pid_t pid;
 	int status;
 
 	while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
 	    (pid == -1 && errno == EINTR))
 		;
 	errno = save_errno;
 }
 
 /*
  * Signal handler for the alarm after the login grace period has expired.
  */
 static void
 grace_alarm_handler(int sig)
 {
 	/*
 	 * Try to kill any processes that we have spawned, E.g. authorized
 	 * keys command helpers or privsep children.
 	 */
 	if (getpgid(0) == getpid()) {
 		ssh_signal(SIGTERM, SIG_IGN);
 		kill(0, SIGTERM);
 	}
 
 	/* Log error and exit. */
 	sigdie("Timeout before authentication for %s port %d",
 	    ssh_remote_ipaddr(the_active_state),
 	    ssh_remote_port(the_active_state));
 }
 
 /* Destroy the host and server keys.  They will no longer be needed. */
 void
 destroy_sensitive_data(void)
 {
 	u_int i;
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		if (sensitive_data.host_keys[i]) {
 			sshkey_free(sensitive_data.host_keys[i]);
 			sensitive_data.host_keys[i] = NULL;
 		}
 		if (sensitive_data.host_certificates[i]) {
 			sshkey_free(sensitive_data.host_certificates[i]);
 			sensitive_data.host_certificates[i] = NULL;
 		}
 	}
 }
 
 /* Demote private to public keys for network child */
 void
 demote_sensitive_data(void)
 {
 	struct sshkey *tmp;
 	u_int i;
 	int r;
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		if (sensitive_data.host_keys[i]) {
 			if ((r = sshkey_from_private(
 			    sensitive_data.host_keys[i], &tmp)) != 0)
 				fatal_r(r, "could not demote host %s key",
 				    sshkey_type(sensitive_data.host_keys[i]));
 			sshkey_free(sensitive_data.host_keys[i]);
 			sensitive_data.host_keys[i] = tmp;
 		}
 		/* Certs do not need demotion */
 	}
 }
 
 static void
 reseed_prngs(void)
 {
 	u_int32_t rnd[256];
 
 #ifdef WITH_OPENSSL
 	RAND_poll();
 #endif
 	arc4random_stir(); /* noop on recent arc4random() implementations */
 	arc4random_buf(rnd, sizeof(rnd)); /* let arc4random notice PID change */
 
 #ifdef WITH_OPENSSL
 	RAND_seed(rnd, sizeof(rnd));
 	/* give libcrypto a chance to notice the PID change */
 	if ((RAND_bytes((u_char *)rnd, 1)) != 1)
 		fatal("%s: RAND_bytes failed", __func__);
 #endif
 
 	explicit_bzero(rnd, sizeof(rnd));
 }
 
 static void
 privsep_preauth_child(void)
 {
 	gid_t gidset[1];
 
 	/* Enable challenge-response authentication for privilege separation */
 	privsep_challenge_enable();
 
 #ifdef GSSAPI
 	/* Cache supported mechanism OIDs for later use */
 	ssh_gssapi_prepare_supported_oids();
 #endif
 
 	reseed_prngs();
 
 	/* Demote the private keys to public keys. */
 	demote_sensitive_data();
 
 	/* Demote the child */
 	if (privsep_chroot) {
 		/* Change our root directory */
 		if (chroot(_PATH_PRIVSEP_CHROOT_DIR) == -1)
 			fatal("chroot(\"%s\"): %s", _PATH_PRIVSEP_CHROOT_DIR,
 			    strerror(errno));
 		if (chdir("/") == -1)
 			fatal("chdir(\"/\"): %s", strerror(errno));
 
 		/* Drop our privileges */
 		debug3("privsep user:group %u:%u", (u_int)privsep_pw->pw_uid,
 		    (u_int)privsep_pw->pw_gid);
 		gidset[0] = privsep_pw->pw_gid;
 		if (setgroups(1, gidset) == -1)
 			fatal("setgroups: %.100s", strerror(errno));
 		permanently_set_uid(privsep_pw);
 	}
 }
 
 static int
 privsep_preauth(struct ssh *ssh)
 {
 	int status, r;
 	pid_t pid;
 	struct ssh_sandbox *box = NULL;
 
 	/* Set up unprivileged child process to deal with network data */
 	pmonitor = monitor_init();
 	/* Store a pointer to the kex for later rekeying */
 	pmonitor->m_pkex = &ssh->kex;
 
 	if (use_privsep == PRIVSEP_ON)
 		box = ssh_sandbox_init(pmonitor);
 	pid = fork();
 	if (pid == -1) {
 		fatal("fork of unprivileged child failed");
 	} else if (pid != 0) {
 		debug2("Network child is on pid %ld", (long)pid);
 
 		pmonitor->m_pid = pid;
 		if (have_agent) {
 			r = ssh_get_authentication_socket(&auth_sock);
 			if (r != 0) {
 				error_r(r, "Could not get agent socket");
 				have_agent = 0;
 			}
 		}
 		if (box != NULL)
 			ssh_sandbox_parent_preauth(box, pid);
 		monitor_child_preauth(ssh, pmonitor);
 
 		/* Wait for the child's exit status */
 		while (waitpid(pid, &status, 0) == -1) {
 			if (errno == EINTR)
 				continue;
 			pmonitor->m_pid = -1;
 			fatal_f("waitpid: %s", strerror(errno));
 		}
 		privsep_is_preauth = 0;
 		pmonitor->m_pid = -1;
 		if (WIFEXITED(status)) {
 			if (WEXITSTATUS(status) != 0)
 				fatal_f("preauth child exited with status %d",
 				    WEXITSTATUS(status));
 		} else if (WIFSIGNALED(status))
 			fatal_f("preauth child terminated by signal %d",
 			    WTERMSIG(status));
 		if (box != NULL)
 			ssh_sandbox_parent_finish(box);
 		return 1;
 	} else {
 		/* child */
 		close(pmonitor->m_sendfd);
 		close(pmonitor->m_log_recvfd);
 
 		/* Arrange for logging to be sent to the monitor */
 		set_log_handler(mm_log_handler, pmonitor);
 
 		privsep_preauth_child();
 		setproctitle("%s", "[net]");
 		if (box != NULL)
 			ssh_sandbox_child(box);
 
 		return 0;
 	}
 }
 
 static void
 privsep_postauth(struct ssh *ssh, Authctxt *authctxt)
 {
 #ifdef DISABLE_FD_PASSING
 	if (1) {
 #else
 	if (authctxt->pw->pw_uid == 0) {
 #endif
 		/* File descriptor passing is broken or root login */
 		use_privsep = 0;
 		goto skip;
 	}
 
 	/* New socket pair */
 	monitor_reinit(pmonitor);
 
 	pmonitor->m_pid = fork();
 	if (pmonitor->m_pid == -1)
 		fatal("fork of unprivileged child failed");
 	else if (pmonitor->m_pid != 0) {
 		verbose("User child is on pid %ld", (long)pmonitor->m_pid);
 		sshbuf_reset(loginmsg);
 		monitor_clear_keystate(ssh, pmonitor);
 		monitor_child_postauth(ssh, pmonitor);
 
 		/* NEVERREACHED */
 		exit(0);
 	}
 
 	/* child */
 
 	close(pmonitor->m_sendfd);
 	pmonitor->m_sendfd = -1;
 
 	/* Demote the private keys to public keys. */
 	demote_sensitive_data();
 
 	reseed_prngs();
 
 	/* Drop privileges */
 	do_setusercontext(authctxt->pw);
 
  skip:
 	/* It is safe now to apply the key state */
 	monitor_apply_keystate(ssh, pmonitor);
 
 	/*
 	 * Tell the packet layer that authentication was successful, since
 	 * this information is not part of the key state.
 	 */
 	ssh_packet_set_authenticated(ssh);
 }
 
 static void
 append_hostkey_type(struct sshbuf *b, const char *s)
 {
 	int r;
 
 	if (match_pattern_list(s, options.hostkeyalgorithms, 0) != 1) {
 		debug3_f("%s key not permitted by HostkeyAlgorithms", s);
 		return;
 	}
 	if ((r = sshbuf_putf(b, "%s%s", sshbuf_len(b) > 0 ? "," : "", s)) != 0)
 		fatal_fr(r, "sshbuf_putf");
 }
 
 static char *
 list_hostkey_types(void)
 {
 	struct sshbuf *b;
 	struct sshkey *key;
 	char *ret;
 	u_int i;
 
 	if ((b = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	for (i = 0; i < options.num_host_key_files; i++) {
 		key = sensitive_data.host_keys[i];
 		if (key == NULL)
 			key = sensitive_data.host_pubkeys[i];
 		if (key == NULL)
 			continue;
 		switch (key->type) {
 		case KEY_RSA:
 			/* for RSA we also support SHA2 signatures */
 			append_hostkey_type(b, "rsa-sha2-512");
 			append_hostkey_type(b, "rsa-sha2-256");
 			/* FALLTHROUGH */
 		case KEY_DSA:
 		case KEY_ECDSA:
 		case KEY_ED25519:
 		case KEY_ECDSA_SK:
 		case KEY_ED25519_SK:
 		case KEY_XMSS:
 			append_hostkey_type(b, sshkey_ssh_name(key));
 			break;
 		}
 		/* If the private key has a cert peer, then list that too */
 		key = sensitive_data.host_certificates[i];
 		if (key == NULL)
 			continue;
 		switch (key->type) {
 		case KEY_RSA_CERT:
 			/* for RSA we also support SHA2 signatures */
 			append_hostkey_type(b,
 			    "rsa-sha2-512-cert-v01@openssh.com");
 			append_hostkey_type(b,
 			    "rsa-sha2-256-cert-v01@openssh.com");
 			/* FALLTHROUGH */
 		case KEY_DSA_CERT:
 		case KEY_ECDSA_CERT:
 		case KEY_ED25519_CERT:
 		case KEY_ECDSA_SK_CERT:
 		case KEY_ED25519_SK_CERT:
 		case KEY_XMSS_CERT:
 			append_hostkey_type(b, sshkey_ssh_name(key));
 			break;
 		}
 	}
 	if ((ret = sshbuf_dup_string(b)) == NULL)
 		fatal_f("sshbuf_dup_string failed");
 	sshbuf_free(b);
 	debug_f("%s", ret);
 	return ret;
 }
 
 static struct sshkey *
 get_hostkey_by_type(int type, int nid, int need_private, struct ssh *ssh)
 {
 	u_int i;
 	struct sshkey *key;
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		switch (type) {
 		case KEY_RSA_CERT:
 		case KEY_DSA_CERT:
 		case KEY_ECDSA_CERT:
 		case KEY_ED25519_CERT:
 		case KEY_ECDSA_SK_CERT:
 		case KEY_ED25519_SK_CERT:
 		case KEY_XMSS_CERT:
 			key = sensitive_data.host_certificates[i];
 			break;
 		default:
 			key = sensitive_data.host_keys[i];
 			if (key == NULL && !need_private)
 				key = sensitive_data.host_pubkeys[i];
 			break;
 		}
 		if (key == NULL || key->type != type)
 			continue;
 		switch (type) {
 		case KEY_ECDSA:
 		case KEY_ECDSA_SK:
 		case KEY_ECDSA_CERT:
 		case KEY_ECDSA_SK_CERT:
 			if (key->ecdsa_nid != nid)
 				continue;
 			/* FALLTHROUGH */
 		default:
 			return need_private ?
 			    sensitive_data.host_keys[i] : key;
 		}
 	}
 	return NULL;
 }
 
 struct sshkey *
 get_hostkey_public_by_type(int type, int nid, struct ssh *ssh)
 {
 	return get_hostkey_by_type(type, nid, 0, ssh);
 }
 
 struct sshkey *
 get_hostkey_private_by_type(int type, int nid, struct ssh *ssh)
 {
 	return get_hostkey_by_type(type, nid, 1, ssh);
 }
 
 struct sshkey *
 get_hostkey_by_index(int ind)
 {
 	if (ind < 0 || (u_int)ind >= options.num_host_key_files)
 		return (NULL);
 	return (sensitive_data.host_keys[ind]);
 }
 
 struct sshkey *
 get_hostkey_public_by_index(int ind, struct ssh *ssh)
 {
 	if (ind < 0 || (u_int)ind >= options.num_host_key_files)
 		return (NULL);
 	return (sensitive_data.host_pubkeys[ind]);
 }
 
 int
 get_hostkey_index(struct sshkey *key, int compare, struct ssh *ssh)
 {
 	u_int i;
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		if (sshkey_is_cert(key)) {
 			if (key == sensitive_data.host_certificates[i] ||
 			    (compare && sensitive_data.host_certificates[i] &&
 			    sshkey_equal(key,
 			    sensitive_data.host_certificates[i])))
 				return (i);
 		} else {
 			if (key == sensitive_data.host_keys[i] ||
 			    (compare && sensitive_data.host_keys[i] &&
 			    sshkey_equal(key, sensitive_data.host_keys[i])))
 				return (i);
 			if (key == sensitive_data.host_pubkeys[i] ||
 			    (compare && sensitive_data.host_pubkeys[i] &&
 			    sshkey_equal(key, sensitive_data.host_pubkeys[i])))
 				return (i);
 		}
 	}
 	return (-1);
 }
 
 /* Inform the client of all hostkeys */
 static void
 notify_hostkeys(struct ssh *ssh)
 {
 	struct sshbuf *buf;
 	struct sshkey *key;
 	u_int i, nkeys;
 	int r;
 	char *fp;
 
 	/* Some clients cannot cope with the hostkeys message, skip those. */
 	if (ssh->compat & SSH_BUG_HOSTKEYS)
 		return;
 
 	if ((buf = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new");
 	for (i = nkeys = 0; i < options.num_host_key_files; i++) {
 		key = get_hostkey_public_by_index(i, ssh);
 		if (key == NULL || key->type == KEY_UNSPEC ||
 		    sshkey_is_cert(key))
 			continue;
 		fp = sshkey_fingerprint(key, options.fingerprint_hash,
 		    SSH_FP_DEFAULT);
 		debug3_f("key %d: %s %s", i, sshkey_ssh_name(key), fp);
 		free(fp);
 		if (nkeys == 0) {
 			/*
 			 * Start building the request when we find the
 			 * first usable key.
 			 */
 			if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
 			    (r = sshpkt_put_cstring(ssh, "hostkeys-00@openssh.com")) != 0 ||
 			    (r = sshpkt_put_u8(ssh, 0)) != 0) /* want reply */
 				sshpkt_fatal(ssh, r, "%s: start request", __func__);
 		}
 		/* Append the key to the request */
 		sshbuf_reset(buf);
 		if ((r = sshkey_putb(key, buf)) != 0)
 			fatal_fr(r, "couldn't put hostkey %d", i);
 		if ((r = sshpkt_put_stringb(ssh, buf)) != 0)
 			sshpkt_fatal(ssh, r, "%s: append key", __func__);
 		nkeys++;
 	}
 	debug3_f("sent %u hostkeys", nkeys);
 	if (nkeys == 0)
 		fatal_f("no hostkeys");
 	if ((r = sshpkt_send(ssh)) != 0)
 		sshpkt_fatal(ssh, r, "%s: send", __func__);
 	sshbuf_free(buf);
 }
 
 /*
  * returns 1 if connection should be dropped, 0 otherwise.
  * dropping starts at connection #max_startups_begin with a probability
  * of (max_startups_rate/100). the probability increases linearly until
  * all connections are dropped for startups > max_startups
  */
 static int
 should_drop_connection(int startups)
 {
 	int p, r;
 
 	if (startups < options.max_startups_begin)
 		return 0;
 	if (startups >= options.max_startups)
 		return 1;
 	if (options.max_startups_rate == 100)
 		return 1;
 
 	p  = 100 - options.max_startups_rate;
 	p *= startups - options.max_startups_begin;
 	p /= options.max_startups - options.max_startups_begin;
 	p += options.max_startups_rate;
 	r = arc4random_uniform(100);
 
 	debug_f("p %d, r %d", p, r);
 	return (r < p) ? 1 : 0;
 }
 
 /*
  * Check whether connection should be accepted by MaxStartups.
  * Returns 0 if the connection is accepted. If the connection is refused,
  * returns 1 and attempts to send notification to client.
  * Logs when the MaxStartups condition is entered or exited, and periodically
  * while in that state.
  */
 static int
 drop_connection(int sock, int startups, int notify_pipe)
 {
 	char *laddr, *raddr;
 	const char msg[] = "Exceeded MaxStartups\r\n";
 	static time_t last_drop, first_drop;
 	static u_int ndropped;
 	LogLevel drop_level = SYSLOG_LEVEL_VERBOSE;
 	time_t now;
 
 	now = monotime();
 	if (!should_drop_connection(startups) &&
 	    srclimit_check_allow(sock, notify_pipe) == 1) {
 		if (last_drop != 0 &&
 		    startups < options.max_startups_begin - 1) {
 			/* XXX maybe need better hysteresis here */
 			logit("exited MaxStartups throttling after %s, "
 			    "%u connections dropped",
 			    fmt_timeframe(now - first_drop), ndropped);
 			last_drop = 0;
 		}
 		return 0;
 	}
 
 #define SSHD_MAXSTARTUPS_LOG_INTERVAL	(5 * 60)
 	if (last_drop == 0) {
 		error("beginning MaxStartups throttling");
 		drop_level = SYSLOG_LEVEL_INFO;
 		first_drop = now;
 		ndropped = 0;
 	} else if (last_drop + SSHD_MAXSTARTUPS_LOG_INTERVAL < now) {
 		/* Periodic logs */
 		error("in MaxStartups throttling for %s, "
 		    "%u connections dropped",
 		    fmt_timeframe(now - first_drop), ndropped + 1);
 		drop_level = SYSLOG_LEVEL_INFO;
 	}
 	last_drop = now;
 	ndropped++;
 
 	laddr = get_local_ipaddr(sock);
 	raddr = get_peer_ipaddr(sock);
 	do_log2(drop_level, "drop connection #%d from [%s]:%d on [%s]:%d "
 	    "past MaxStartups", startups, raddr, get_peer_port(sock),
 	    laddr, get_local_port(sock));
 	free(laddr);
 	free(raddr);
 	/* best-effort notification to client */
 	(void)write(sock, msg, sizeof(msg) - 1);
 	return 1;
 }
 
 static void
 usage(void)
 {
 	fprintf(stderr, "%s, %s\n", SSH_RELEASE, SSH_OPENSSL_VERSION);
 	fprintf(stderr,
 "usage: sshd [-46DdeGiqTtV] [-C connection_spec] [-c host_cert_file]\n"
 "            [-E log_file] [-f config_file] [-g login_grace_time]\n"
 "            [-h host_key_file] [-o option] [-p port] [-u len]\n"
 	);
 	exit(1);
 }
 
 static void
 send_rexec_state(int fd, struct sshbuf *conf)
 {
 	struct sshbuf *m = NULL, *inc = NULL;
 	struct include_item *item = NULL;
 	int r;
 
 	debug3_f("entering fd = %d config len %zu", fd,
 	    sshbuf_len(conf));
 
 	if ((m = sshbuf_new()) == NULL || (inc = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 
 	/* pack includes into a string */
 	TAILQ_FOREACH(item, &includes, entry) {
 		if ((r = sshbuf_put_cstring(inc, item->selector)) != 0 ||
 		    (r = sshbuf_put_cstring(inc, item->filename)) != 0 ||
 		    (r = sshbuf_put_stringb(inc, item->contents)) != 0)
 			fatal_fr(r, "compose includes");
 	}
 
 	/*
 	 * Protocol from reexec master to child:
 	 *	string	configuration
 	 *	string	included_files[] {
 	 *		string	selector
 	 *		string	filename
 	 *		string	contents
 	 *	}
 	 */
 	if ((r = sshbuf_put_stringb(m, conf)) != 0 ||
 	    (r = sshbuf_put_stringb(m, inc)) != 0)
 		fatal_fr(r, "compose config");
 	if (ssh_msg_send(fd, 0, m) == -1)
 		error_f("ssh_msg_send failed");
 
 	sshbuf_free(m);
 	sshbuf_free(inc);
 
 	debug3_f("done");
 }
 
 static void
 recv_rexec_state(int fd, struct sshbuf *conf)
 {
 	struct sshbuf *m, *inc;
 	u_char *cp, ver;
 	size_t len;
 	int r;
 	struct include_item *item;
 
 	debug3_f("entering fd = %d", fd);
 
 	if ((m = sshbuf_new()) == NULL || (inc = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if (ssh_msg_recv(fd, m) == -1)
 		fatal_f("ssh_msg_recv failed");
 	if ((r = sshbuf_get_u8(m, &ver)) != 0)
 		fatal_fr(r, "parse version");
 	if (ver != 0)
 		fatal_f("rexec version mismatch");
 	if ((r = sshbuf_get_string(m, &cp, &len)) != 0 ||
 	    (r = sshbuf_get_stringb(m, inc)) != 0)
 		fatal_fr(r, "parse config");
 
 	if (conf != NULL && (r = sshbuf_put(conf, cp, len)))
 		fatal_fr(r, "sshbuf_put");
 
 	while (sshbuf_len(inc) != 0) {
 		item = xcalloc(1, sizeof(*item));
 		if ((item->contents = sshbuf_new()) == NULL)
 			fatal_f("sshbuf_new failed");
 		if ((r = sshbuf_get_cstring(inc, &item->selector, NULL)) != 0 ||
 		    (r = sshbuf_get_cstring(inc, &item->filename, NULL)) != 0 ||
 		    (r = sshbuf_get_stringb(inc, item->contents)) != 0)
 			fatal_fr(r, "parse includes");
 		TAILQ_INSERT_TAIL(&includes, item, entry);
 	}
 
 	free(cp);
 	sshbuf_free(m);
 
 	debug3_f("done");
 }
 
 /* Accept a connection from inetd */
 static void
 server_accept_inetd(int *sock_in, int *sock_out)
 {
 	if (rexeced_flag) {
 		close(REEXEC_CONFIG_PASS_FD);
 		*sock_in = *sock_out = dup(STDIN_FILENO);
 	} else {
 		*sock_in = dup(STDIN_FILENO);
 		*sock_out = dup(STDOUT_FILENO);
 	}
 	/*
 	 * We intentionally do not close the descriptors 0, 1, and 2
 	 * as our code for setting the descriptors won't work if
 	 * ttyfd happens to be one of those.
 	 */
 	if (stdfd_devnull(1, 1, !log_stderr) == -1)
 		error_f("stdfd_devnull failed");
 	debug("inetd sockets after dupping: %d, %d", *sock_in, *sock_out);
 }
 
 /*
  * Listen for TCP connections
  */
 static void
 listen_on_addrs(struct listenaddr *la)
 {
 	int ret, listen_sock;
 	struct addrinfo *ai;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
 
 	for (ai = la->addrs; ai; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
 			continue;
 		if (num_listen_socks >= MAX_LISTEN_SOCKS)
 			fatal("Too many listen sockets. "
 			    "Enlarge MAX_LISTEN_SOCKS");
 		if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen,
 		    ntop, sizeof(ntop), strport, sizeof(strport),
 		    NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
 			error("getnameinfo failed: %.100s",
 			    ssh_gai_strerror(ret));
 			continue;
 		}
 		/* Create socket for listening. */
 		listen_sock = socket(ai->ai_family, ai->ai_socktype,
 		    ai->ai_protocol);
 		if (listen_sock == -1) {
 			/* kernel may not support ipv6 */
 			verbose("socket: %.100s", strerror(errno));
 			continue;
 		}
 		if (set_nonblock(listen_sock) == -1) {
 			close(listen_sock);
 			continue;
 		}
 		if (fcntl(listen_sock, F_SETFD, FD_CLOEXEC) == -1) {
 			verbose("socket: CLOEXEC: %s", strerror(errno));
 			close(listen_sock);
 			continue;
 		}
 		/* Socket options */
 		set_reuseaddr(listen_sock);
 		if (la->rdomain != NULL &&
 		    set_rdomain(listen_sock, la->rdomain) == -1) {
 			close(listen_sock);
 			continue;
 		}
 
 		/* Only communicate in IPv6 over AF_INET6 sockets. */
 		if (ai->ai_family == AF_INET6)
 			sock_set_v6only(listen_sock);
 
 		debug("Bind to port %s on %s.", strport, ntop);
 
 		/* Bind the socket to the desired port. */
 		if (bind(listen_sock, ai->ai_addr, ai->ai_addrlen) == -1) {
 			error("Bind to port %s on %s failed: %.200s.",
 			    strport, ntop, strerror(errno));
 			close(listen_sock);
 			continue;
 		}
 		listen_socks[num_listen_socks] = listen_sock;
 		num_listen_socks++;
 
 		/* Start listening on the port. */
 		if (listen(listen_sock, SSH_LISTEN_BACKLOG) == -1)
 			fatal("listen on [%s]:%s: %.100s",
 			    ntop, strport, strerror(errno));
 		logit("Server listening on %s port %s%s%s.",
 		    ntop, strport,
 		    la->rdomain == NULL ? "" : " rdomain ",
 		    la->rdomain == NULL ? "" : la->rdomain);
 	}
 }
 
 static void
 server_listen(void)
 {
 	u_int i;
 
 	/* Initialise per-source limit tracking. */
 	srclimit_init(options.max_startups, options.per_source_max_startups,
 	    options.per_source_masklen_ipv4, options.per_source_masklen_ipv6);
 
 	for (i = 0; i < options.num_listen_addrs; i++) {
 		listen_on_addrs(&options.listen_addrs[i]);
 		freeaddrinfo(options.listen_addrs[i].addrs);
 		free(options.listen_addrs[i].rdomain);
 		memset(&options.listen_addrs[i], 0,
 		    sizeof(options.listen_addrs[i]));
 	}
 	free(options.listen_addrs);
 	options.listen_addrs = NULL;
 	options.num_listen_addrs = 0;
 
 	if (!num_listen_socks)
 		fatal("Cannot bind any address.");
 }
 
 /*
  * The main TCP accept loop. Note that, for the non-debug case, returns
  * from this function are in a forked subprocess.
  */
 static void
 server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s)
 {
 	struct pollfd *pfd = NULL;
 	int i, j, ret, npfd;
 	int ostartups = -1, startups = 0, listening = 0, lameduck = 0;
 	int startup_p[2] = { -1 , -1 }, *startup_pollfd;
 	char c = 0;
 	struct sockaddr_storage from;
 	socklen_t fromlen;
 	pid_t pid;
 	u_char rnd[256];
 	sigset_t nsigset, osigset;
 
 	/* pipes connected to unauthenticated child sshd processes */
 	startup_pipes = xcalloc(options.max_startups, sizeof(int));
 	startup_flags = xcalloc(options.max_startups, sizeof(int));
 	startup_pollfd = xcalloc(options.max_startups, sizeof(int));
 	for (i = 0; i < options.max_startups; i++)
 		startup_pipes[i] = -1;
 
 	/*
 	 * Prepare signal mask that we use to block signals that might set
 	 * received_sigterm or received_sighup, so that we are guaranteed
 	 * to immediately wake up the ppoll if a signal is received after
 	 * the flag is checked.
 	 */
 	sigemptyset(&nsigset);
 	sigaddset(&nsigset, SIGHUP);
 	sigaddset(&nsigset, SIGCHLD);
 	sigaddset(&nsigset, SIGTERM);
 	sigaddset(&nsigset, SIGQUIT);
 
 	/* sized for worst-case */
 	pfd = xcalloc(num_listen_socks + options.max_startups,
 	    sizeof(struct pollfd));
 
 	/*
 	 * Stay listening for connections until the system crashes or
 	 * the daemon is killed with a signal.
 	 */
 	for (;;) {
 		sigprocmask(SIG_BLOCK, &nsigset, &osigset);
 		if (received_sigterm) {
 			logit("Received signal %d; terminating.",
 			    (int) received_sigterm);
 			close_listen_socks();
 			if (options.pid_file != NULL)
 				unlink(options.pid_file);
 			exit(received_sigterm == SIGTERM ? 0 : 255);
 		}
 		if (ostartups != startups) {
 			setproctitle("%s [listener] %d of %d-%d startups",
 			    listener_proctitle, startups,
 			    options.max_startups_begin, options.max_startups);
 			ostartups = startups;
 		}
 		if (received_sighup) {
 			if (!lameduck) {
 				debug("Received SIGHUP; waiting for children");
 				close_listen_socks();
 				lameduck = 1;
 			}
 			if (listening <= 0) {
 				sigprocmask(SIG_SETMASK, &osigset, NULL);
 				sighup_restart();
 			}
 		}
 
 		for (i = 0; i < num_listen_socks; i++) {
 			pfd[i].fd = listen_socks[i];
 			pfd[i].events = POLLIN;
 		}
 		npfd = num_listen_socks;
 		for (i = 0; i < options.max_startups; i++) {
 			startup_pollfd[i] = -1;
 			if (startup_pipes[i] != -1) {
 				pfd[npfd].fd = startup_pipes[i];
 				pfd[npfd].events = POLLIN;
 				startup_pollfd[i] = npfd++;
 			}
 		}
 
 		/* Wait until a connection arrives or a child exits. */
 		ret = ppoll(pfd, npfd, NULL, &osigset);
 		if (ret == -1 && errno != EINTR) {
 			error("ppoll: %.100s", strerror(errno));
 			if (errno == EINVAL)
 				cleanup_exit(1); /* can't recover */
 		}
 		sigprocmask(SIG_SETMASK, &osigset, NULL);
 		if (ret == -1)
 			continue;
 
 		for (i = 0; i < options.max_startups; i++) {
 			if (startup_pipes[i] == -1 ||
 			    startup_pollfd[i] == -1 ||
 			    !(pfd[startup_pollfd[i]].revents & (POLLIN|POLLHUP)))
 				continue;
 			switch (read(startup_pipes[i], &c, sizeof(c))) {
 			case -1:
 				if (errno == EINTR || errno == EAGAIN)
 					continue;
 				if (errno != EPIPE) {
 					error_f("startup pipe %d (fd=%d): "
 					    "read %s", i, startup_pipes[i],
 					    strerror(errno));
 				}
 				/* FALLTHROUGH */
 			case 0:
 				/* child exited or completed auth */
 				close(startup_pipes[i]);
 				srclimit_done(startup_pipes[i]);
 				startup_pipes[i] = -1;
 				startups--;
 				if (startup_flags[i])
 					listening--;
 				break;
 			case 1:
 				/* child has finished preliminaries */
 				if (startup_flags[i]) {
 					listening--;
 					startup_flags[i] = 0;
 				}
 				break;
 			}
 		}
 		for (i = 0; i < num_listen_socks; i++) {
 			if (!(pfd[i].revents & POLLIN))
 				continue;
 			fromlen = sizeof(from);
 			*newsock = accept(listen_socks[i],
 			    (struct sockaddr *)&from, &fromlen);
 			if (*newsock == -1) {
 				if (errno != EINTR && errno != EWOULDBLOCK &&
 				    errno != ECONNABORTED && errno != EAGAIN)
 					error("accept: %.100s",
 					    strerror(errno));
 				if (errno == EMFILE || errno == ENFILE)
 					usleep(100 * 1000);
 				continue;
 			}
 			if (unset_nonblock(*newsock) == -1) {
 				close(*newsock);
 				continue;
 			}
 			if (pipe(startup_p) == -1) {
 				error_f("pipe(startup_p): %s", strerror(errno));
 				close(*newsock);
 				continue;
 			}
 			if (drop_connection(*newsock, startups, startup_p[0])) {
 				close(*newsock);
 				close(startup_p[0]);
 				close(startup_p[1]);
 				continue;
 			}
 
 			if (rexec_flag && socketpair(AF_UNIX,
 			    SOCK_STREAM, 0, config_s) == -1) {
 				error("reexec socketpair: %s",
 				    strerror(errno));
 				close(*newsock);
 				close(startup_p[0]);
 				close(startup_p[1]);
 				continue;
 			}
 
 			for (j = 0; j < options.max_startups; j++)
 				if (startup_pipes[j] == -1) {
 					startup_pipes[j] = startup_p[0];
 					startups++;
 					startup_flags[j] = 1;
 					break;
 				}
 
 			/*
 			 * Got connection.  Fork a child to handle it, unless
 			 * we are in debugging mode.
 			 */
 			if (debug_flag) {
 				/*
 				 * In debugging mode.  Close the listening
 				 * socket, and start processing the
 				 * connection without forking.
 				 */
 				debug("Server will not fork when running in debugging mode.");
 				close_listen_socks();
 				*sock_in = *newsock;
 				*sock_out = *newsock;
 				close(startup_p[0]);
 				close(startup_p[1]);
 				startup_pipe = -1;
 				pid = getpid();
 				if (rexec_flag) {
 					send_rexec_state(config_s[0], cfg);
 					close(config_s[0]);
 				}
 				free(pfd);
 				return;
 			}
 
 			/*
 			 * Normal production daemon.  Fork, and have
 			 * the child process the connection. The
 			 * parent continues listening.
 			 */
 			platform_pre_fork();
 			listening++;
 			if ((pid = fork()) == 0) {
 				/*
 				 * Child.  Close the listening and
 				 * max_startup sockets.  Start using
 				 * the accepted socket. Reinitialize
 				 * logging (since our pid has changed).
 				 * We return from this function to handle
 				 * the connection.
 				 */
 				platform_post_fork_child();
 				startup_pipe = startup_p[1];
 				close_startup_pipes();
 				close_listen_socks();
 				*sock_in = *newsock;
 				*sock_out = *newsock;
 				log_init(__progname,
 				    options.log_level,
 				    options.log_facility,
 				    log_stderr);
 				if (rexec_flag)
 					close(config_s[0]);
 				else {
 					/*
 					 * Signal parent that the preliminaries
 					 * for this child are complete. For the
 					 * re-exec case, this happens after the
 					 * child has received the rexec state
 					 * from the server.
 					 */
 					(void)atomicio(vwrite, startup_pipe,
 					    "\0", 1);
 				}
 				free(pfd);
 				return;
 			}
 
 			/* Parent.  Stay in the loop. */
 			platform_post_fork_parent(pid);
 			if (pid == -1)
 				error("fork: %.100s", strerror(errno));
 			else
 				debug("Forked child %ld.", (long)pid);
 
 			close(startup_p[1]);
 
 			if (rexec_flag) {
 				close(config_s[1]);
 				send_rexec_state(config_s[0], cfg);
 				close(config_s[0]);
 			}
 			close(*newsock);
 
 			/*
 			 * Ensure that our random state differs
 			 * from that of the child
 			 */
 			arc4random_stir();
 			arc4random_buf(rnd, sizeof(rnd));
 #ifdef WITH_OPENSSL
 			RAND_seed(rnd, sizeof(rnd));
 			if ((RAND_bytes((u_char *)rnd, 1)) != 1)
 				fatal("%s: RAND_bytes failed", __func__);
 #endif
 			explicit_bzero(rnd, sizeof(rnd));
 		}
 	}
 }
 
 /*
  * If IP options are supported, make sure there are none (log and
  * return an error if any are found).  Basically we are worried about
  * source routing; it can be used to pretend you are somebody
  * (ip-address) you are not. That itself may be "almost acceptable"
  * under certain circumstances, but rhosts authentication is useless
  * if source routing is accepted. Notice also that if we just dropped
  * source routing here, the other side could use IP spoofing to do
  * rest of the interaction and could still bypass security.  So we
  * exit here if we detect any IP options.
  */
 static void
 check_ip_options(struct ssh *ssh)
 {
 #ifdef IP_OPTIONS
 	int sock_in = ssh_packet_get_connection_in(ssh);
 	struct sockaddr_storage from;
 	u_char opts[200];
 	socklen_t i, option_size = sizeof(opts), fromlen = sizeof(from);
 	char text[sizeof(opts) * 3 + 1];
 
 	memset(&from, 0, sizeof(from));
 	if (getpeername(sock_in, (struct sockaddr *)&from,
 	    &fromlen) == -1)
 		return;
 	if (from.ss_family != AF_INET)
 		return;
 	/* XXX IPv6 options? */
 
 	if (getsockopt(sock_in, IPPROTO_IP, IP_OPTIONS, opts,
 	    &option_size) >= 0 && option_size != 0) {
 		text[0] = '\0';
 		for (i = 0; i < option_size; i++)
 			snprintf(text + i*3, sizeof(text) - i*3,
 			    " %2.2x", opts[i]);
 		fatal("Connection from %.100s port %d with IP opts: %.800s",
 		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
 	}
 	return;
 #endif /* IP_OPTIONS */
 }
 
 /* Set the routing domain for this process */
 static void
 set_process_rdomain(struct ssh *ssh, const char *name)
 {
 #if defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
 	if (name == NULL)
 		return; /* default */
 
 	if (strcmp(name, "%D") == 0) {
 		/* "expands" to routing domain of connection */
 		if ((name = ssh_packet_rdomain_in(ssh)) == NULL)
 			return;
 	}
 	/* NB. We don't pass 'ssh' to sys_set_process_rdomain() */
 	return sys_set_process_rdomain(name);
 #elif defined(__OpenBSD__)
 	int rtable, ortable = getrtable();
 	const char *errstr;
 
 	if (name == NULL)
 		return; /* default */
 
 	if (strcmp(name, "%D") == 0) {
 		/* "expands" to routing domain of connection */
 		if ((name = ssh_packet_rdomain_in(ssh)) == NULL)
 			return;
 	}
 
 	rtable = (int)strtonum(name, 0, 255, &errstr);
 	if (errstr != NULL) /* Shouldn't happen */
 		fatal("Invalid routing domain \"%s\": %s", name, errstr);
 	if (rtable != ortable && setrtable(rtable) != 0)
 		fatal("Unable to set routing domain %d: %s",
 		    rtable, strerror(errno));
 	debug_f("set routing domain %d (was %d)", rtable, ortable);
 #else /* defined(__OpenBSD__) */
 	fatal("Unable to set routing domain: not supported in this platform");
 #endif
 }
 
 static void
 accumulate_host_timing_secret(struct sshbuf *server_cfg,
     struct sshkey *key)
 {
 	static struct ssh_digest_ctx *ctx;
 	u_char *hash;
 	size_t len;
 	struct sshbuf *buf;
 	int r;
 
 	if (ctx == NULL && (ctx = ssh_digest_start(SSH_DIGEST_SHA512)) == NULL)
 		fatal_f("ssh_digest_start");
 	if (key == NULL) { /* finalize */
 		/* add server config in case we are using agent for host keys */
 		if (ssh_digest_update(ctx, sshbuf_ptr(server_cfg),
 		    sshbuf_len(server_cfg)) != 0)
 			fatal_f("ssh_digest_update");
 		len = ssh_digest_bytes(SSH_DIGEST_SHA512);
 		hash = xmalloc(len);
 		if (ssh_digest_final(ctx, hash, len) != 0)
 			fatal_f("ssh_digest_final");
 		options.timing_secret = PEEK_U64(hash);
 		freezero(hash, len);
 		ssh_digest_free(ctx);
 		ctx = NULL;
 		return;
 	}
 	if ((buf = sshbuf_new()) == NULL)
 		fatal_f("could not allocate buffer");
 	if ((r = sshkey_private_serialize(key, buf)) != 0)
 		fatal_fr(r, "encode %s key", sshkey_ssh_name(key));
 	if (ssh_digest_update(ctx, sshbuf_ptr(buf), sshbuf_len(buf)) != 0)
 		fatal_f("ssh_digest_update");
 	sshbuf_reset(buf);
 	sshbuf_free(buf);
 }
 
 static char *
 prepare_proctitle(int ac, char **av)
 {
 	char *ret = NULL;
 	int i;
 
 	for (i = 0; i < ac; i++)
 		xextendf(&ret, " ", "%s", av[i]);
 	return ret;
 }
 
 static void
 print_config(struct ssh *ssh, struct connection_info *connection_info)
 {
 	/*
 	 * If no connection info was provided by -C then use
 	 * use a blank one that will cause no predicate to match.
 	 */
 	if (connection_info == NULL)
 		connection_info = get_connection_info(ssh, 0, 0);
 	connection_info->test = 1;
 	parse_server_match_config(&options, &includes, connection_info);
 	dump_config(&options);
 	exit(0);
 }
 
 /*
  * Main program for the daemon.
  */
 int
 main(int ac, char **av)
 {
 	struct ssh *ssh = NULL;
 	extern char *optarg;
 	extern int optind;
 	int r, opt, on = 1, do_dump_cfg = 0, already_daemon, remote_port;
 	int sock_in = -1, sock_out = -1, newsock = -1;
 	const char *remote_ip, *rdomain;
 	char *fp, *line, *laddr, *logfile = NULL;
 	int config_s[2] = { -1 , -1 };
 	u_int i, j;
 	u_int64_t ibytes, obytes;
 	mode_t new_umask;
 	struct sshkey *key;
 	struct sshkey *pubkey;
 	int keytype;
 	Authctxt *authctxt;
 	struct connection_info *connection_info = NULL;
 	sigset_t sigmask;
 
 #ifdef HAVE_SECUREWARE
 	(void)set_auth_parameters(ac, av);
 #endif
 	__progname = ssh_get_progname(av[0]);
 
 	sigemptyset(&sigmask);
 	sigprocmask(SIG_SETMASK, &sigmask, NULL);
 
 	/* Save argv. Duplicate so setproctitle emulation doesn't clobber it */
 	saved_argc = ac;
 	rexec_argc = ac;
 	saved_argv = xcalloc(ac + 1, sizeof(*saved_argv));
 	for (i = 0; (int)i < ac; i++)
 		saved_argv[i] = xstrdup(av[i]);
 	saved_argv[i] = NULL;
 
 #ifndef HAVE_SETPROCTITLE
 	/* Prepare for later setproctitle emulation */
 	compat_init_setproctitle(ac, av);
 	av = saved_argv;
 #endif
 
 	if (geteuid() == 0 && setgroups(0, NULL) == -1)
 		debug("setgroups(): %.200s", strerror(errno));
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
 
 	/* Initialize configuration options to their default values. */
 	initialize_server_options(&options);
 
 	/* Parse command-line arguments. */
 	while ((opt = getopt(ac, av,
 	    "C:E:b:c:f:g:h:k:o:p:u:46DGQRTdeiqrtV")) != -1) {
 		switch (opt) {
 		case '4':
 			options.address_family = AF_INET;
 			break;
 		case '6':
 			options.address_family = AF_INET6;
 			break;
 		case 'f':
 			config_file_name = optarg;
 			break;
 		case 'c':
 			servconf_add_hostcert("[command-line]", 0,
 			    &options, optarg);
 			break;
 		case 'd':
 			if (debug_flag == 0) {
 				debug_flag = 1;
 				options.log_level = SYSLOG_LEVEL_DEBUG1;
 			} else if (options.log_level < SYSLOG_LEVEL_DEBUG3)
 				options.log_level++;
 			break;
 		case 'D':
 			no_daemon_flag = 1;
 			break;
 		case 'G':
 			do_dump_cfg = 1;
 			break;
 		case 'E':
 			logfile = optarg;
 			/* FALLTHROUGH */
 		case 'e':
 			log_stderr = 1;
 			break;
 		case 'i':
 			inetd_flag = 1;
 			break;
 		case 'r':
 			rexec_flag = 0;
 			break;
 		case 'R':
 			rexeced_flag = 1;
 			inetd_flag = 1;
 			break;
 		case 'Q':
 			/* ignored */
 			break;
 		case 'q':
 			options.log_level = SYSLOG_LEVEL_QUIET;
 			break;
 		case 'b':
 			/* protocol 1, ignored */
 			break;
 		case 'p':
 			options.ports_from_cmdline = 1;
 			if (options.num_ports >= MAX_PORTS) {
 				fprintf(stderr, "too many ports.\n");
 				exit(1);
 			}
 			options.ports[options.num_ports++] = a2port(optarg);
 			if (options.ports[options.num_ports-1] <= 0) {
 				fprintf(stderr, "Bad port number.\n");
 				exit(1);
 			}
 			break;
 		case 'g':
 			if ((options.login_grace_time = convtime(optarg)) == -1) {
 				fprintf(stderr, "Invalid login grace time.\n");
 				exit(1);
 			}
 			break;
 		case 'k':
 			/* protocol 1, ignored */
 			break;
 		case 'h':
 			servconf_add_hostkey("[command-line]", 0,
 			    &options, optarg, 1);
 			break;
 		case 't':
 			test_flag = 1;
 			break;
 		case 'T':
 			test_flag = 2;
 			break;
 		case 'C':
 			connection_info = get_connection_info(ssh, 0, 0);
 			if (parse_server_match_testspec(connection_info,
 			    optarg) == -1)
 				exit(1);
 			break;
 		case 'u':
 			utmp_len = (u_int)strtonum(optarg, 0, HOST_NAME_MAX+1+1, NULL);
 			if (utmp_len > HOST_NAME_MAX+1) {
 				fprintf(stderr, "Invalid utmp length.\n");
 				exit(1);
 			}
 			break;
 		case 'o':
 			line = xstrdup(optarg);
 			if (process_server_config_line(&options, line,
 			    "command-line", 0, NULL, NULL, &includes) != 0)
 				exit(1);
 			free(line);
 			break;
 		case 'V':
 			fprintf(stderr, "%s, %s\n",
 			    SSH_RELEASE, SSH_OPENSSL_VERSION);
 			exit(0);
 		default:
 			usage();
 			break;
 		}
 	}
 	if (rexeced_flag || inetd_flag)
 		rexec_flag = 0;
 	if (!test_flag && !do_dump_cfg && rexec_flag && !path_absolute(av[0]))
 		fatal("sshd re-exec requires execution with an absolute path");
 	if (rexeced_flag)
 		closefrom(REEXEC_MIN_FREE_FD);
 	else
 		closefrom(REEXEC_DEVCRYPTO_RESERVED_FD);
 
 	seed_rng();
 
 	/* If requested, redirect the logs to the specified logfile. */
 	if (logfile != NULL)
 		log_redirect_stderr_to(logfile);
 	/*
 	 * Force logging to stderr until we have loaded the private host
 	 * key (unless started from inetd)
 	 */
 	log_init(__progname,
 	    options.log_level == SYSLOG_LEVEL_NOT_SET ?
 	    SYSLOG_LEVEL_INFO : options.log_level,
 	    options.log_facility == SYSLOG_FACILITY_NOT_SET ?
 	    SYSLOG_FACILITY_AUTH : options.log_facility,
 	    log_stderr || !inetd_flag || debug_flag);
 
 	/*
 	 * Unset KRB5CCNAME, otherwise the user's session may inherit it from
 	 * root's environment
 	 */
 	if (getenv("KRB5CCNAME") != NULL)
 		(void) unsetenv("KRB5CCNAME");
 
 	sensitive_data.have_ssh2_key = 0;
 
 	/*
 	 * If we're not doing an extended test do not silently ignore connection
 	 * test params.
 	 */
 	if (test_flag < 2 && connection_info != NULL)
 		fatal("Config test connection parameter (-C) provided without "
 		    "test mode (-T)");
 
 	/* Fetch our configuration */
 	if ((cfg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	if (rexeced_flag) {
 		setproctitle("%s", "[rexeced]");
 		recv_rexec_state(REEXEC_CONFIG_PASS_FD, cfg);
 		if (!debug_flag) {
 			startup_pipe = dup(REEXEC_STARTUP_PIPE_FD);
 			close(REEXEC_STARTUP_PIPE_FD);
 			/*
 			 * Signal parent that this child is at a point where
 			 * they can go away if they have a SIGHUP pending.
 			 */
 			(void)atomicio(vwrite, startup_pipe, "\0", 1);
 		}
 	} else if (strcasecmp(config_file_name, "none") != 0)
 		load_server_config(config_file_name, cfg);
 
 	parse_server_config(&options, rexeced_flag ? "rexec" : config_file_name,
 	    cfg, &includes, NULL, rexeced_flag);
 
 #ifdef WITH_OPENSSL
 	if (options.moduli_file != NULL)
 		dh_set_moduli_file(options.moduli_file);
 #endif
 
 	/* Fill in default values for those options not explicitly set. */
 	fill_default_server_options(&options);
 
 	/* Check that options are sensible */
 	if (options.authorized_keys_command_user == NULL &&
 	    (options.authorized_keys_command != NULL &&
 	    strcasecmp(options.authorized_keys_command, "none") != 0))
 		fatal("AuthorizedKeysCommand set without "
 		    "AuthorizedKeysCommandUser");
 	if (options.authorized_principals_command_user == NULL &&
 	    (options.authorized_principals_command != NULL &&
 	    strcasecmp(options.authorized_principals_command, "none") != 0))
 		fatal("AuthorizedPrincipalsCommand set without "
 		    "AuthorizedPrincipalsCommandUser");
 
 	/*
 	 * Check whether there is any path through configured auth methods.
 	 * Unfortunately it is not possible to verify this generally before
 	 * daemonisation in the presence of Match block, but this catches
 	 * and warns for trivial misconfigurations that could break login.
 	 */
 	if (options.num_auth_methods != 0) {
 		for (i = 0; i < options.num_auth_methods; i++) {
 			if (auth2_methods_valid(options.auth_methods[i],
 			    1) == 0)
 				break;
 		}
 		if (i >= options.num_auth_methods)
 			fatal("AuthenticationMethods cannot be satisfied by "
 			    "enabled authentication methods");
 	}
 
 	/* Check that there are no remaining arguments. */
 	if (optind < ac) {
 		fprintf(stderr, "Extra argument %s.\n", av[optind]);
 		exit(1);
 	}
 
 	debug("sshd version %s, %s", SSH_VERSION, SSH_OPENSSL_VERSION);
 
 	if (do_dump_cfg)
 		print_config(ssh, connection_info);
 
 	/* Store privilege separation user for later use if required. */
 	privsep_chroot = use_privsep && (getuid() == 0 || geteuid() == 0);
 	if ((privsep_pw = getpwnam(SSH_PRIVSEP_USER)) == NULL) {
 		if (privsep_chroot || options.kerberos_authentication)
 			fatal("Privilege separation user %s does not exist",
 			    SSH_PRIVSEP_USER);
 	} else {
 		privsep_pw = pwcopy(privsep_pw);
 		freezero(privsep_pw->pw_passwd, strlen(privsep_pw->pw_passwd));
 		privsep_pw->pw_passwd = xstrdup("*");
 	}
 	endpwent();
 
 	/* load host keys */
 	sensitive_data.host_keys = xcalloc(options.num_host_key_files,
 	    sizeof(struct sshkey *));
 	sensitive_data.host_pubkeys = xcalloc(options.num_host_key_files,
 	    sizeof(struct sshkey *));
 
 	if (options.host_key_agent) {
 		if (strcmp(options.host_key_agent, SSH_AUTHSOCKET_ENV_NAME))
 			setenv(SSH_AUTHSOCKET_ENV_NAME,
 			    options.host_key_agent, 1);
 		if ((r = ssh_get_authentication_socket(NULL)) == 0)
 			have_agent = 1;
 		else
 			error_r(r, "Could not connect to agent \"%s\"",
 			    options.host_key_agent);
 	}
 
 	for (i = 0; i < options.num_host_key_files; i++) {
 		int ll = options.host_key_file_userprovided[i] ?
 		    SYSLOG_LEVEL_ERROR : SYSLOG_LEVEL_DEBUG1;
 
 		if (options.host_key_files[i] == NULL)
 			continue;
 		if ((r = sshkey_load_private(options.host_key_files[i], "",
 		    &key, NULL)) != 0 && r != SSH_ERR_SYSTEM_ERROR)
 			do_log2_r(r, ll, "Unable to load host key \"%s\"",
 			    options.host_key_files[i]);
 		if (sshkey_is_sk(key) &&
 		    key->sk_flags & SSH_SK_USER_PRESENCE_REQD) {
 			debug("host key %s requires user presence, ignoring",
 			    options.host_key_files[i]);
 			key->sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
 		}
 		if (r == 0 && key != NULL &&
 		    (r = sshkey_shield_private(key)) != 0) {
 			do_log2_r(r, ll, "Unable to shield host key \"%s\"",
 			    options.host_key_files[i]);
 			sshkey_free(key);
 			key = NULL;
 		}
 		if ((r = sshkey_load_public(options.host_key_files[i],
 		    &pubkey, NULL)) != 0 && r != SSH_ERR_SYSTEM_ERROR)
 			do_log2_r(r, ll, "Unable to load host key \"%s\"",
 			    options.host_key_files[i]);
 		if (pubkey != NULL && key != NULL) {
 			if (!sshkey_equal(pubkey, key)) {
 				error("Public key for %s does not match "
 				    "private key", options.host_key_files[i]);
 				sshkey_free(pubkey);
 				pubkey = NULL;
 			}
 		}
 		if (pubkey == NULL && key != NULL) {
 			if ((r = sshkey_from_private(key, &pubkey)) != 0)
 				fatal_r(r, "Could not demote key: \"%s\"",
 				    options.host_key_files[i]);
 		}
 		if (pubkey != NULL && (r = sshkey_check_rsa_length(pubkey,
 		    options.required_rsa_size)) != 0) {
 			error_fr(r, "Host key %s", options.host_key_files[i]);
 			sshkey_free(pubkey);
 			sshkey_free(key);
 			continue;
 		}
 		sensitive_data.host_keys[i] = key;
 		sensitive_data.host_pubkeys[i] = pubkey;
 
 		if (key == NULL && pubkey != NULL && have_agent) {
 			debug("will rely on agent for hostkey %s",
 			    options.host_key_files[i]);
 			keytype = pubkey->type;
 		} else if (key != NULL) {
 			keytype = key->type;
 			accumulate_host_timing_secret(cfg, key);
 		} else {
 			do_log2(ll, "Unable to load host key: %s",
 			    options.host_key_files[i]);
 			sensitive_data.host_keys[i] = NULL;
 			sensitive_data.host_pubkeys[i] = NULL;
 			continue;
 		}
 
 		switch (keytype) {
 		case KEY_RSA:
 		case KEY_DSA:
 		case KEY_ECDSA:
 		case KEY_ED25519:
 		case KEY_ECDSA_SK:
 		case KEY_ED25519_SK:
 		case KEY_XMSS:
 			if (have_agent || key != NULL)
 				sensitive_data.have_ssh2_key = 1;
 			break;
 		}
 		if ((fp = sshkey_fingerprint(pubkey, options.fingerprint_hash,
 		    SSH_FP_DEFAULT)) == NULL)
 			fatal("sshkey_fingerprint failed");
 		debug("%s host key #%d: %s %s",
 		    key ? "private" : "agent", i, sshkey_ssh_name(pubkey), fp);
 		free(fp);
 	}
 	accumulate_host_timing_secret(cfg, NULL);
 	if (!sensitive_data.have_ssh2_key) {
 		logit("sshd: no hostkeys available -- exiting.");
 		exit(1);
 	}
 
 	/*
 	 * Load certificates. They are stored in an array at identical
 	 * indices to the public keys that they relate to.
 	 */
 	sensitive_data.host_certificates = xcalloc(options.num_host_key_files,
 	    sizeof(struct sshkey *));
 	for (i = 0; i < options.num_host_key_files; i++)
 		sensitive_data.host_certificates[i] = NULL;
 
 	for (i = 0; i < options.num_host_cert_files; i++) {
 		if (options.host_cert_files[i] == NULL)
 			continue;
 		if ((r = sshkey_load_public(options.host_cert_files[i],
 		    &key, NULL)) != 0) {
 			error_r(r, "Could not load host certificate \"%s\"",
 			    options.host_cert_files[i]);
 			continue;
 		}
 		if (!sshkey_is_cert(key)) {
 			error("Certificate file is not a certificate: %s",
 			    options.host_cert_files[i]);
 			sshkey_free(key);
 			continue;
 		}
 		/* Find matching private key */
 		for (j = 0; j < options.num_host_key_files; j++) {
 			if (sshkey_equal_public(key,
 			    sensitive_data.host_pubkeys[j])) {
 				sensitive_data.host_certificates[j] = key;
 				break;
 			}
 		}
 		if (j >= options.num_host_key_files) {
 			error("No matching private key for certificate: %s",
 			    options.host_cert_files[i]);
 			sshkey_free(key);
 			continue;
 		}
 		sensitive_data.host_certificates[j] = key;
 		debug("host certificate: #%u type %d %s", j, key->type,
 		    sshkey_type(key));
 	}
 
 	if (privsep_chroot) {
 		struct stat st;
 
 		if ((stat(_PATH_PRIVSEP_CHROOT_DIR, &st) == -1) ||
 		    (S_ISDIR(st.st_mode) == 0))
 			fatal("Missing privilege separation directory: %s",
 			    _PATH_PRIVSEP_CHROOT_DIR);
 
 #ifdef HAVE_CYGWIN
 		if (check_ntsec(_PATH_PRIVSEP_CHROOT_DIR) &&
 		    (st.st_uid != getuid () ||
 		    (st.st_mode & (S_IWGRP|S_IWOTH)) != 0))
 #else
 		if (st.st_uid != 0 || (st.st_mode & (S_IWGRP|S_IWOTH)) != 0)
 #endif
 			fatal("%s must be owned by root and not group or "
 			    "world-writable.", _PATH_PRIVSEP_CHROOT_DIR);
 	}
 
 	if (test_flag > 1)
 		print_config(ssh, connection_info);
 
 	/* Configuration looks good, so exit if in test mode. */
 	if (test_flag)
 		exit(0);
 
 	/*
 	 * Clear out any supplemental groups we may have inherited.  This
 	 * prevents inadvertent creation of files with bad modes (in the
 	 * portable version at least, it's certainly possible for PAM
 	 * to create a file, and we can't control the code in every
 	 * module which might be used).
 	 */
 	if (setgroups(0, NULL) < 0)
 		debug("setgroups() failed: %.200s", strerror(errno));
 
 	if (rexec_flag) {
 		if (rexec_argc < 0)
 			fatal("rexec_argc %d < 0", rexec_argc);
 		rexec_argv = xcalloc(rexec_argc + 2, sizeof(char *));
 		for (i = 0; i < (u_int)rexec_argc; i++) {
 			debug("rexec_argv[%d]='%s'", i, saved_argv[i]);
 			rexec_argv[i] = saved_argv[i];
 		}
 		rexec_argv[rexec_argc] = "-R";
 		rexec_argv[rexec_argc + 1] = NULL;
 	}
 	listener_proctitle = prepare_proctitle(ac, av);
 
 	/* Ensure that umask disallows at least group and world write */
 	new_umask = umask(0077) | 0022;
 	(void) umask(new_umask);
 
 	/* Initialize the log (it is reinitialized below in case we forked). */
 	if (debug_flag && (!inetd_flag || rexeced_flag))
 		log_stderr = 1;
 	log_init(__progname, options.log_level,
 	    options.log_facility, log_stderr);
 	for (i = 0; i < options.num_log_verbose; i++)
 		log_verbose_add(options.log_verbose[i]);
 
 	/*
 	 * If not in debugging mode, not started from inetd and not already
 	 * daemonized (eg re-exec via SIGHUP), disconnect from the controlling
 	 * terminal, and fork.  The original process exits.
 	 */
 	already_daemon = daemonized();
 	if (!(debug_flag || inetd_flag || no_daemon_flag || already_daemon)) {
 
 		if (daemon(0, 0) == -1)
 			fatal("daemon() failed: %.200s", strerror(errno));
 
 		disconnect_controlling_tty();
 	}
 	/* Reinitialize the log (because of the fork above). */
 	log_init(__progname, options.log_level, options.log_facility, log_stderr);
 
 	/*
 	 * Chdir to the root directory so that the current disk can be
 	 * unmounted if desired.
 	 */
 	if (chdir("/") == -1)
 		error("chdir(\"/\"): %s", strerror(errno));
 
 	/* ignore SIGPIPE */
 	ssh_signal(SIGPIPE, SIG_IGN);
 
 	/* Get a connection, either from inetd or a listening TCP socket */
 	if (inetd_flag) {
 		server_accept_inetd(&sock_in, &sock_out);
 	} else {
 		platform_pre_listen();
 		server_listen();
 
 		ssh_signal(SIGHUP, sighup_handler);
 		ssh_signal(SIGCHLD, main_sigchld_handler);
 		ssh_signal(SIGTERM, sigterm_handler);
 		ssh_signal(SIGQUIT, sigterm_handler);
 
 		/*
 		 * Write out the pid file after the sigterm handler
 		 * is setup and the listen sockets are bound
 		 */
 		if (options.pid_file != NULL && !debug_flag) {
 			FILE *f = fopen(options.pid_file, "w");
 
 			if (f == NULL) {
 				error("Couldn't create pid file \"%s\": %s",
 				    options.pid_file, strerror(errno));
 			} else {
 				fprintf(f, "%ld\n", (long) getpid());
 				fclose(f);
 			}
 		}
 
 		/* Accept a connection and return in a forked child */
 		server_accept_loop(&sock_in, &sock_out,
 		    &newsock, config_s);
 	}
 
 	/* This is the child processing a new connection. */
 	setproctitle("%s", "[accepted]");
 
 	/*
 	 * Create a new session and process group since the 4.4BSD
 	 * setlogin() affects the entire process group.  We don't
 	 * want the child to be able to affect the parent.
 	 */
 	if (!debug_flag && !inetd_flag && setsid() == -1)
 		error("setsid: %.100s", strerror(errno));
 
 	if (rexec_flag) {
 		debug("rexec start in %d out %d newsock %d pipe %d sock %d",
 		    sock_in, sock_out, newsock, startup_pipe, config_s[0]);
 		if (dup2(newsock, STDIN_FILENO) == -1)
 			debug3_f("dup2 stdin: %s", strerror(errno));
 		if (dup2(STDIN_FILENO, STDOUT_FILENO) == -1)
 			debug3_f("dup2 stdout: %s", strerror(errno));
 		if (startup_pipe == -1)
 			close(REEXEC_STARTUP_PIPE_FD);
 		else if (startup_pipe != REEXEC_STARTUP_PIPE_FD) {
 			if (dup2(startup_pipe, REEXEC_STARTUP_PIPE_FD) == -1)
 				debug3_f("dup2 startup_p: %s", strerror(errno));
 			close(startup_pipe);
 			startup_pipe = REEXEC_STARTUP_PIPE_FD;
 		}
 
 		if (dup2(config_s[1], REEXEC_CONFIG_PASS_FD) == -1)
 			debug3_f("dup2 config_s: %s", strerror(errno));
 		close(config_s[1]);
 
 		ssh_signal(SIGHUP, SIG_IGN); /* avoid reset to SIG_DFL */
 		execv(rexec_argv[0], rexec_argv);
 
 		/* Reexec has failed, fall back and continue */
 		error("rexec of %s failed: %s", rexec_argv[0], strerror(errno));
 		recv_rexec_state(REEXEC_CONFIG_PASS_FD, NULL);
 		log_init(__progname, options.log_level,
 		    options.log_facility, log_stderr);
 
 		/* Clean up fds */
 		close(REEXEC_CONFIG_PASS_FD);
 		newsock = sock_out = sock_in = dup(STDIN_FILENO);
 		if (stdfd_devnull(1, 1, 0) == -1)
 			error_f("stdfd_devnull failed");
 		debug("rexec cleanup in %d out %d newsock %d pipe %d sock %d",
 		    sock_in, sock_out, newsock, startup_pipe, config_s[0]);
 	}
 
 	/* Executed child processes don't need these. */
 	fcntl(sock_out, F_SETFD, FD_CLOEXEC);
 	fcntl(sock_in, F_SETFD, FD_CLOEXEC);
 
 	/* We will not restart on SIGHUP since it no longer makes sense. */
 	ssh_signal(SIGALRM, SIG_DFL);
 	ssh_signal(SIGHUP, SIG_DFL);
 	ssh_signal(SIGTERM, SIG_DFL);
 	ssh_signal(SIGQUIT, SIG_DFL);
 	ssh_signal(SIGCHLD, SIG_DFL);
 	ssh_signal(SIGINT, SIG_DFL);
 
 	/*
 	 * Register our connection.  This turns encryption off because we do
 	 * not have a key.
 	 */
 	if ((ssh = ssh_packet_set_connection(NULL, sock_in, sock_out)) == NULL)
 		fatal("Unable to create connection");
 	the_active_state = ssh;
 	ssh_packet_set_server(ssh);
 
 	check_ip_options(ssh);
 
 	/* Prepare the channels layer */
 	channel_init_channels(ssh);
 	channel_set_af(ssh, options.address_family);
 	process_channel_timeouts(ssh, &options);
 	process_permitopen(ssh, &options);
 
 	/* Set SO_KEEPALIVE if requested. */
 	if (options.tcp_keep_alive && ssh_packet_connection_is_on_socket(ssh) &&
 	    setsockopt(sock_in, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) == -1)
 		error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
 
 	if ((remote_port = ssh_remote_port(ssh)) < 0) {
 		debug("ssh_remote_port failed");
 		cleanup_exit(255);
 	}
 
 	if (options.routing_domain != NULL)
 		set_process_rdomain(ssh, options.routing_domain);
 
 	/*
 	 * The rest of the code depends on the fact that
 	 * ssh_remote_ipaddr() caches the remote ip, even if
 	 * the socket goes away.
 	 */
 	remote_ip = ssh_remote_ipaddr(ssh);
 
 #ifdef SSH_AUDIT_EVENTS
 	audit_connection_from(remote_ip, remote_port);
 #endif
 
 	rdomain = ssh_packet_rdomain_in(ssh);
 
 	/* Log the connection. */
 	laddr = get_local_ipaddr(sock_in);
 	verbose("Connection from %s port %d on %s port %d%s%s%s",
 	    remote_ip, remote_port, laddr,  ssh_local_port(ssh),
 	    rdomain == NULL ? "" : " rdomain \"",
 	    rdomain == NULL ? "" : rdomain,
 	    rdomain == NULL ? "" : "\"");
 	free(laddr);
 
 	/*
 	 * We don't want to listen forever unless the other side
 	 * successfully authenticates itself.  So we set up an alarm which is
 	 * cleared after successful authentication.  A limit of zero
 	 * indicates no limit. Note that we don't set the alarm in debugging
 	 * mode; it is just annoying to have the server exit just when you
 	 * are about to discover the bug.
 	 */
 	ssh_signal(SIGALRM, grace_alarm_handler);
 	if (!debug_flag)
 		alarm(options.login_grace_time);
 
 	if ((r = kex_exchange_identification(ssh, -1,
 	    options.version_addendum)) != 0)
 		sshpkt_fatal(ssh, r, "banner exchange");
 
 	ssh_packet_set_nonblocking(ssh);
 
 	/* allocate authentication context */
 	authctxt = xcalloc(1, sizeof(*authctxt));
 	ssh->authctxt = authctxt;
 
 	authctxt->loginmsg = loginmsg;
 
 	/* XXX global for cleanup, access from other modules */
 	the_authctxt = authctxt;
 
 	/* Set default key authentication options */
 	if ((auth_opts = sshauthopt_new_with_keys_defaults()) == NULL)
 		fatal("allocation failed");
 
 	/* prepare buffer to collect messages to display to user after login */
 	if ((loginmsg = sshbuf_new()) == NULL)
 		fatal_f("sshbuf_new failed");
 	auth_debug_reset();
 
 	if (use_privsep) {
 		if (privsep_preauth(ssh) == 1)
 			goto authenticated;
 	} else if (have_agent) {
 		if ((r = ssh_get_authentication_socket(&auth_sock)) != 0) {
 			error_r(r, "Unable to get agent socket");
 			have_agent = 0;
 		}
 	}
 
 	/* perform the key exchange */
 	/* authenticate user and start session */
 	do_ssh2_kex(ssh);
 	do_authentication2(ssh);
 
 	/*
 	 * If we use privilege separation, the unprivileged child transfers
 	 * the current keystate and exits
 	 */
 	if (use_privsep) {
 		mm_send_keystate(ssh, pmonitor);
 		ssh_packet_clear_keys(ssh);
 		exit(0);
 	}
 
  authenticated:
 	/*
 	 * Cancel the alarm we set to limit the time taken for
 	 * authentication.
 	 */
 	alarm(0);
 	ssh_signal(SIGALRM, SIG_DFL);
 	authctxt->authenticated = 1;
 	if (startup_pipe != -1) {
 		close(startup_pipe);
 		startup_pipe = -1;
 	}
 
 #ifdef SSH_AUDIT_EVENTS
 	audit_event(ssh, SSH_AUTH_SUCCESS);
 #endif
 
 #ifdef GSSAPI
 	if (options.gss_authentication) {
 		temporarily_use_uid(authctxt->pw);
 		ssh_gssapi_storecreds();
 		restore_uid();
 	}
 #endif
 #ifdef USE_PAM
 	if (options.use_pam) {
 		do_pam_setcred(1);
 		do_pam_session(ssh);
 	}
 #endif
 
 	/*
 	 * In privilege separation, we fork another child and prepare
 	 * file descriptor passing.
 	 */
 	if (use_privsep) {
 		privsep_postauth(ssh, authctxt);
 		/* the monitor process [priv] will not return */
 	}
 
 	ssh_packet_set_timeout(ssh, options.client_alive_interval,
 	    options.client_alive_count_max);
 
 	/* Try to send all our hostkeys to the client */
 	notify_hostkeys(ssh);
 
 	/* Start session. */
 	do_authenticated(ssh, authctxt);
 
 	/* The connection has been terminated. */
 	ssh_packet_get_bytes(ssh, &ibytes, &obytes);
 	verbose("Transferred: sent %llu, received %llu bytes",
 	    (unsigned long long)obytes, (unsigned long long)ibytes);
 
 	verbose("Closing connection to %.500s port %d", remote_ip, remote_port);
 
 #ifdef USE_PAM
 	if (options.use_pam)
 		finish_pam();
 #endif /* USE_PAM */
 
 #ifdef SSH_AUDIT_EVENTS
 	PRIVSEP(audit_event(ssh, SSH_CONNECTION_CLOSE));
 #endif
 
 	ssh_packet_close(ssh);
 
 	if (use_privsep)
 		mm_terminate();
 
 	exit(0);
 }
 
 int
 sshd_hostkey_sign(struct ssh *ssh, struct sshkey *privkey,
     struct sshkey *pubkey, u_char **signature, size_t *slenp,
     const u_char *data, size_t dlen, const char *alg)
 {
 	int r;
 
 	if (use_privsep) {
 		if (privkey) {
 			if (mm_sshkey_sign(ssh, privkey, signature, slenp,
 			    data, dlen, alg, options.sk_provider, NULL,
 			    ssh->compat) < 0)
 				fatal_f("privkey sign failed");
 		} else {
 			if (mm_sshkey_sign(ssh, pubkey, signature, slenp,
 			    data, dlen, alg, options.sk_provider, NULL,
 			    ssh->compat) < 0)
 				fatal_f("pubkey sign failed");
 		}
 	} else {
 		if (privkey) {
 			if (sshkey_sign(privkey, signature, slenp, data, dlen,
 			    alg, options.sk_provider, NULL, ssh->compat) < 0)
 				fatal_f("privkey sign failed");
 		} else {
 			if ((r = ssh_agent_sign(auth_sock, pubkey,
 			    signature, slenp, data, dlen, alg,
 			    ssh->compat)) != 0) {
 				fatal_fr(r, "agent sign failed");
 			}
 		}
 	}
 	return 0;
 }
 
 /* SSH2 key exchange */
 static void
 do_ssh2_kex(struct ssh *ssh)
 {
 	char *hkalgs = NULL, *myproposal[PROPOSAL_MAX];
 	const char *compression = NULL;
 	struct kex *kex;
 	int r;
 
 	if (options.rekey_limit || options.rekey_interval)
 		ssh_packet_set_rekey_limits(ssh, options.rekey_limit,
 		    options.rekey_interval);
 
 	if (options.compression == COMP_NONE)
 		compression = "none";
 	hkalgs = list_hostkey_types();
 
 	kex_proposal_populate_entries(ssh, myproposal, options.kex_algorithms,
 	    options.ciphers, options.macs, compression, hkalgs);
 
 	free(hkalgs);
 
 	/* start key exchange */
 	if ((r = kex_setup(ssh, myproposal)) != 0)
 		fatal_r(r, "kex_setup");
 	kex_set_server_sig_algs(ssh, options.pubkey_accepted_algos);
 	kex = ssh->kex;
 
 #ifdef WITH_OPENSSL
 	kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server;
 	kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server;
 	kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_server;
 	kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_server;
 	kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_server;
 	kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
 	kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
 # ifdef OPENSSL_HAS_ECC
 	kex->kex[KEX_ECDH_SHA2] = kex_gen_server;
 # endif
 #endif
 	kex->kex[KEX_C25519_SHA256] = kex_gen_server;
 	kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server;
 	kex->load_host_public_key=&get_hostkey_public_by_type;
 	kex->load_host_private_key=&get_hostkey_private_by_type;
 	kex->host_key_index=&get_hostkey_index;
 	kex->sign = sshd_hostkey_sign;
 
 	ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &kex->done);
+	kex_proposal_free_entries(myproposal);
 
 #ifdef DEBUG_KEXDH
 	/* send 1st encrypted/maced/compressed message */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
 	    (r = sshpkt_put_cstring(ssh, "markus")) != 0 ||
 	    (r = sshpkt_send(ssh)) != 0 ||
 	    (r = ssh_packet_write_wait(ssh)) != 0)
 		fatal_fr(r, "send test");
 #endif
-	kex_proposal_free_entries(myproposal);
 	debug("KEX done");
 }
 
 /* server specific fatal cleanup */
 void
 cleanup_exit(int i)
 {
 	if (the_active_state != NULL && the_authctxt != NULL) {
 		do_cleanup(the_active_state, the_authctxt);
 		if (use_privsep && privsep_is_preauth &&
 		    pmonitor != NULL && pmonitor->m_pid > 1) {
 			debug("Killing privsep child %d", pmonitor->m_pid);
 			if (kill(pmonitor->m_pid, SIGKILL) != 0 &&
 			    errno != ESRCH) {
 				error_f("kill(%d): %s", pmonitor->m_pid,
 				    strerror(errno));
 			}
 		}
 	}
 #ifdef SSH_AUDIT_EVENTS
 	/* done after do_cleanup so it can cancel the PAM auth 'thread' */
 	if (the_active_state != NULL && (!use_privsep || mm_is_monitor()))
 		audit_event(the_active_state, SSH_CONNECTION_ABANDON);
 #endif
 	_exit(i);
 }
diff --git a/sshd_config.0 b/sshd_config.0
index 94c0ac893e86..8b397396c237 100644
--- a/sshd_config.0
+++ b/sshd_config.0
@@ -1,1290 +1,1296 @@
 SSHD_CONFIG(5)                File Formats Manual               SSHD_CONFIG(5)
 
 NAME
      sshd_config M-bM-^@M-^S OpenSSH daemon configuration file
 
 DESCRIPTION
      sshd(8) reads configuration data from /etc/ssh/sshd_config (or the file
      specified with -f on the command line).  The file contains keyword-
      argument pairs, one per line.  Unless noted otherwise, for each keyword,
      the first obtained value will be used.  Lines starting with M-bM-^@M-^X#M-bM-^@M-^Y and empty
      lines are interpreted as comments.  Arguments may optionally be enclosed
      in double quotes (") in order to represent arguments containing spaces.
 
      The possible keywords and their meanings are as follows (note that
      keywords are case-insensitive and arguments are case-sensitive):
 
      AcceptEnv
              Specifies what environment variables sent by the client will be
              copied into the session's environ(7).  See SendEnv and SetEnv in
              ssh_config(5) for how to configure the client.  The TERM
              environment variable is always accepted whenever the client
              requests a pseudo-terminal as it is required by the protocol.
              Variables are specified by name, which may contain the wildcard
              characters M-bM-^@M-^X*M-bM-^@M-^Y and M-bM-^@M-^X?M-bM-^@M-^Y.  Multiple environment variables may be
              separated by whitespace or spread across multiple AcceptEnv
              directives.  Be warned that some environment variables could be
              used to bypass restricted user environments.  For this reason,
              care should be taken in the use of this directive.  The default
              is not to accept any environment variables.
 
      AddressFamily
              Specifies which address family should be used by sshd(8).  Valid
              arguments are any (the default), inet (use IPv4 only), or inet6
              (use IPv6 only).
 
      AllowAgentForwarding
              Specifies whether ssh-agent(1) forwarding is permitted.  The
              default is yes.  Note that disabling agent forwarding does not
              improve security unless users are also denied shell access, as
              they can always install their own forwarders.
 
      AllowGroups
              This keyword can be followed by a list of group name patterns,
              separated by spaces.  If specified, login is allowed only for
              users whose primary group or supplementary group list matches one
              of the patterns.  Only group names are valid; a numerical group
              ID is not recognized.  By default, login is allowed for all
              groups.  The allow/deny groups directives are processed in the
              following order: DenyGroups, AllowGroups.
 
              See PATTERNS in ssh_config(5) for more information on patterns.
              This keyword may appear multiple times in sshd_config with each
              instance appending to the list.
 
      AllowStreamLocalForwarding
              Specifies whether StreamLocal (Unix-domain socket) forwarding is
              permitted.  The available options are yes (the default) or all to
              allow StreamLocal forwarding, no to prevent all StreamLocal
              forwarding, local to allow local (from the perspective of ssh(1))
              forwarding only or remote to allow remote forwarding only.  Note
              that disabling StreamLocal forwarding does not improve security
              unless users are also denied shell access, as they can always
              install their own forwarders.
 
      AllowTcpForwarding
              Specifies whether TCP forwarding is permitted.  The available
              options are yes (the default) or all to allow TCP forwarding, no
              to prevent all TCP forwarding, local to allow local (from the
              perspective of ssh(1)) forwarding only or remote to allow remote
              forwarding only.  Note that disabling TCP forwarding does not
              improve security unless users are also denied shell access, as
              they can always install their own forwarders.
 
      AllowUsers
              This keyword can be followed by a list of user name patterns,
              separated by spaces.  If specified, login is allowed only for
              user names that match one of the patterns.  Only user names are
              valid; a numerical user ID is not recognized.  By default, login
              is allowed for all users.  If the pattern takes the form
              USER@HOST then USER and HOST are separately checked, restricting
              logins to particular users from particular hosts.  HOST criteria
              may additionally contain addresses to match in CIDR
              address/masklen format.  The allow/deny users directives are
              processed in the following order: DenyUsers, AllowUsers.
 
              See PATTERNS in ssh_config(5) for more information on patterns.
              This keyword may appear multiple times in sshd_config with each
              instance appending to the list.
 
      AuthenticationMethods
              Specifies the authentication methods that must be successfully
              completed for a user to be granted access.  This option must be
              followed by one or more lists of comma-separated authentication
              method names, or by the single string any to indicate the default
              behaviour of accepting any single authentication method.  If the
              default is overridden, then successful authentication requires
              completion of every method in at least one of these lists.
 
              For example, "publickey,password publickey,keyboard-interactive"
              would require the user to complete public key authentication,
              followed by either password or keyboard interactive
              authentication.  Only methods that are next in one or more lists
              are offered at each stage, so for this example it would not be
              possible to attempt password or keyboard-interactive
              authentication before public key.
 
              For keyboard interactive authentication it is also possible to
              restrict authentication to a specific device by appending a colon
              followed by the device identifier bsdauth or pam.  depending on
              the server configuration.  For example,
              "keyboard-interactive:bsdauth" would restrict keyboard
              interactive authentication to the bsdauth device.
 
              If the publickey method is listed more than once, sshd(8)
              verifies that keys that have been used successfully are not
              reused for subsequent authentications.  For example,
              "publickey,publickey" requires successful authentication using
              two different public keys.
 
              Note that each authentication method listed should also be
              explicitly enabled in the configuration.
 
              The available authentication methods are: "gssapi-with-mic",
              "hostbased", "keyboard-interactive", "none" (used for access to
              password-less accounts when PermitEmptyPasswords is enabled),
              "password" and "publickey".
 
      AuthorizedKeysCommand
              Specifies a program to be used to look up the user's public keys.
              The program must be owned by root, not writable by group or
              others and specified by an absolute path.  Arguments to
              AuthorizedKeysCommand accept the tokens described in the TOKENS
              section.  If no arguments are specified then the username of the
              target user is used.
 
              The program should produce on standard output zero or more lines
              of authorized_keys output (see AUTHORIZED_KEYS in sshd(8)).
              AuthorizedKeysCommand is tried after the usual AuthorizedKeysFile
              files and will not be executed if a matching key is found there.
              By default, no AuthorizedKeysCommand is run.
 
      AuthorizedKeysCommandUser
              Specifies the user under whose account the AuthorizedKeysCommand
              is run.  It is recommended to use a dedicated user that has no
              other role on the host than running authorized keys commands.  If
              AuthorizedKeysCommand is specified but AuthorizedKeysCommandUser
              is not, then sshd(8) will refuse to start.
 
      AuthorizedKeysFile
              Specifies the file that contains the public keys used for user
              authentication.  The format is described in the AUTHORIZED_KEYS
              FILE FORMAT section of sshd(8).  Arguments to AuthorizedKeysFile
              accept the tokens described in the TOKENS section.  After
              expansion, AuthorizedKeysFile is taken to be an absolute path or
              one relative to the user's home directory.  Multiple files may be
              listed, separated by whitespace.  Alternately this option may be
              set to none to skip checking for user keys in files.  The default
              is ".ssh/authorized_keys .ssh/authorized_keys2".
 
      AuthorizedPrincipalsCommand
              Specifies a program to be used to generate the list of allowed
              certificate principals as per AuthorizedPrincipalsFile.  The
              program must be owned by root, not writable by group or others
              and specified by an absolute path.  Arguments to
              AuthorizedPrincipalsCommand accept the tokens described in the
              TOKENS section.  If no arguments are specified then the username
              of the target user is used.
 
              The program should produce on standard output zero or more lines
              of AuthorizedPrincipalsFile output.  If either
              AuthorizedPrincipalsCommand or AuthorizedPrincipalsFile is
              specified, then certificates offered by the client for
              authentication must contain a principal that is listed.  By
              default, no AuthorizedPrincipalsCommand is run.
 
      AuthorizedPrincipalsCommandUser
              Specifies the user under whose account the
              AuthorizedPrincipalsCommand is run.  It is recommended to use a
              dedicated user that has no other role on the host than running
              authorized principals commands.  If AuthorizedPrincipalsCommand
              is specified but AuthorizedPrincipalsCommandUser is not, then
              sshd(8) will refuse to start.
 
      AuthorizedPrincipalsFile
              Specifies a file that lists principal names that are accepted for
              certificate authentication.  When using certificates signed by a
              key listed in TrustedUserCAKeys, this file lists names, one of
              which must appear in the certificate for it to be accepted for
              authentication.  Names are listed one per line preceded by key
              options (as described in AUTHORIZED_KEYS FILE FORMAT in sshd(8)).
              Empty lines and comments starting with M-bM-^@M-^X#M-bM-^@M-^Y are ignored.
 
              Arguments to AuthorizedPrincipalsFile accept the tokens described
              in the TOKENS section.  After expansion, AuthorizedPrincipalsFile
              is taken to be an absolute path or one relative to the user's
              home directory.  The default is none, i.e. not to use a
              principals file M-bM-^@M-^S in this case, the username of the user must
              appear in a certificate's principals list for it to be accepted.
 
              Note that AuthorizedPrincipalsFile is only used when
              authentication proceeds using a CA listed in TrustedUserCAKeys
              and is not consulted for certification authorities trusted via
              ~/.ssh/authorized_keys, though the principals= key option offers
              a similar facility (see sshd(8) for details).
 
      Banner  The contents of the specified file are sent to the remote user
              before authentication is allowed.  If the argument is none then
              no banner is displayed.  By default, no banner is displayed.
 
      CASignatureAlgorithms
              Specifies which algorithms are allowed for signing of
              certificates by certificate authorities (CAs).  The default is:
 
                    ssh-ed25519,ecdsa-sha2-nistp256,
                    ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                    sk-ssh-ed25519@openssh.com,
                    sk-ecdsa-sha2-nistp256@openssh.com,
                    rsa-sha2-512,rsa-sha2-256
 
              If the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the
              specified algorithms will be appended to the default set instead
              of replacing them.  If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y
              character, then the specified algorithms (including wildcards)
              will be removed from the default set instead of replacing them.
 
              Certificates signed using other algorithms will not be accepted
              for public key or host-based authentication.
 
      ChannelTimeout
              Specifies whether and how quickly sshd(8) should close inactive
              channels.  Timeouts are specified as one or more M-bM-^@M-^\type=intervalM-bM-^@M-^]
-             pairs separated by whitespace, where the M-bM-^@M-^\typeM-bM-^@M-^] must be a channel
-             type name (as described in the table below), optionally
-             containing wildcard characters.
+             pairs separated by whitespace, where the M-bM-^@M-^\typeM-bM-^@M-^] must be the
+             special keyword M-bM-^@M-^\globalM-bM-^@M-^] or a channel type name from the list
+             below, optionally containing wildcard characters.
 
              The timeout value M-bM-^@M-^\intervalM-bM-^@M-^] is specified in seconds or may use
              any of the units documented in the TIME FORMATS section.  For
-             example, M-bM-^@M-^\session:*=5mM-bM-^@M-^] would cause all sessions to terminate
-             after five minutes of inactivity.  Specifying a zero value
-             disables the inactivity timeout.
+             example, M-bM-^@M-^\session=5mM-bM-^@M-^] would cause interactive sessions to
+             terminate after five minutes of inactivity.  Specifying a zero
+             value disables the inactivity timeout.
 
-             The available channel types include:
+             The special timeout M-bM-^@M-^\globalM-bM-^@M-^] applies to all active channels,
+             taken together.  Traffic on any active channel will reset the
+             timeout, but when the timeout expires then all open channels will
+             be closed.  Note that this global timeout is not matched by
+             wildcards and must be specified explicitly.
+
+             The available channel type names include:
 
              agent-connection
                      Open connections to ssh-agent(1).
 
              direct-tcpip, direct-streamlocal@openssh.com
                      Open TCP or Unix socket (respectively) connections that
                      have been established from a ssh(1) local forwarding,
                      i.e. LocalForward or DynamicForward.
 
              forwarded-tcpip, forwarded-streamlocal@openssh.com
                      Open TCP or Unix socket (respectively) connections that
                      have been established to a sshd(8) listening on behalf of
                      a ssh(1) remote forwarding, i.e. RemoteForward.
 
-             session:command
-                     Command execution sessions.
-
-             session:shell
-                     Interactive shell sessions.
+             session
+                     The interactive main session, including shell session,
+                     command execution, scp(1), sftp(1), etc.
 
-             session:subsystem:...
-                     Subsystem sessions, e.g. for sftp(1), which could be
-                     identified as session:subsystem:sftp.
+             tun-connection
+                     Open TunnelForward connections.
 
              x11-connection
                      Open X11 forwarding sessions.
 
              Note that in all the above cases, terminating an inactive session
              does not guarantee to remove all resources associated with the
              session, e.g. shell processes or X11 clients relating to the
              session may continue to execute.
 
              Moreover, terminating an inactive channel or session does not
              necessarily close the SSH connection, nor does it prevent a
              client from requesting another channel of the same type.  In
              particular, expiring an inactive forwarding session does not
              prevent another identical forwarding from being subsequently
-             created.  See also UnusedConnectionTimeout, which may be used in
-             conjunction with this option.
+             created.
 
              The default is not to expire channels of any type for inactivity.
 
      ChrootDirectory
              Specifies the pathname of a directory to chroot(2) to after
              authentication.  At session startup sshd(8) checks that all
              components of the pathname are root-owned directories which are
-             not writable by any other user or group.  After the chroot,
-             sshd(8) changes the working directory to the user's home
-             directory.  Arguments to ChrootDirectory accept the tokens
-             described in the TOKENS section.
+             not writable by group or others.  After the chroot, sshd(8)
+             changes the working directory to the user's home directory.
+             Arguments to ChrootDirectory accept the tokens described in the
+             TOKENS section.
 
              The ChrootDirectory must contain the necessary files and
              directories to support the user's session.  For an interactive
              session this requires at least a shell, typically sh(1), and
              basic /dev nodes such as null(4), zero(4), stdin(4), stdout(4),
              stderr(4), and tty(4) devices.  For file transfer sessions using
              SFTP no additional configuration of the environment is necessary
              if the in-process sftp-server is used, though sessions which use
              logging may require /dev/log inside the chroot directory on some
              operating systems (see sftp-server(8) for details).
 
              For safety, it is very important that the directory hierarchy be
              prevented from modification by other processes on the system
              (especially those outside the jail).  Misconfiguration can lead
              to unsafe environments which sshd(8) cannot detect.
 
              The default is none, indicating not to chroot(2).
 
      Ciphers
              Specifies the ciphers allowed.  Multiple ciphers must be comma-
              separated.  If the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character,
              then the specified ciphers will be appended to the default set
              instead of replacing them.  If the specified list begins with a
              M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified ciphers (including wildcards)
              will be removed from the default set instead of replacing them.
              If the specified list begins with a M-bM-^@M-^X^M-bM-^@M-^Y character, then the
              specified ciphers will be placed at the head of the default set.
 
              The supported ciphers are:
 
                    3des-cbc
                    aes128-cbc
                    aes192-cbc
                    aes256-cbc
                    aes128-ctr
                    aes192-ctr
                    aes256-ctr
                    aes128-gcm@openssh.com
                    aes256-gcm@openssh.com
                    chacha20-poly1305@openssh.com
 
              The default is:
 
                    chacha20-poly1305@openssh.com,
                    aes128-ctr,aes192-ctr,aes256-ctr,
                    aes128-gcm@openssh.com,aes256-gcm@openssh.com
 
              The list of available ciphers may also be obtained using "ssh -Q
              cipher".
 
      ClientAliveCountMax
              Sets the number of client alive messages which may be sent
              without sshd(8) receiving any messages back from the client.  If
              this threshold is reached while client alive messages are being
              sent, sshd will disconnect the client, terminating the session.
              It is important to note that the use of client alive messages is
              very different from TCPKeepAlive.  The client alive messages are
              sent through the encrypted channel and therefore will not be
              spoofable.  The TCP keepalive option enabled by TCPKeepAlive is
              spoofable.  The client alive mechanism is valuable when the
              client or server depend on knowing when a connection has become
              unresponsive.
 
              The default value is 3.  If ClientAliveInterval is set to 15, and
              ClientAliveCountMax is left at the default, unresponsive SSH
              clients will be disconnected after approximately 45 seconds.
              Setting a zero ClientAliveCountMax disables connection
              termination.
 
      ClientAliveInterval
              Sets a timeout interval in seconds after which if no data has
              been received from the client, sshd(8) will send a message
              through the encrypted channel to request a response from the
              client.  The default is 0, indicating that these messages will
              not be sent to the client.
 
      Compression
              Specifies whether compression is enabled after the user has
              authenticated successfully.  The argument must be yes, delayed (a
              legacy synonym for yes) or no.  The default is yes.
 
      DenyGroups
              This keyword can be followed by a list of group name patterns,
              separated by spaces.  Login is disallowed for users whose primary
              group or supplementary group list matches one of the patterns.
              Only group names are valid; a numerical group ID is not
              recognized.  By default, login is allowed for all groups.  The
              allow/deny groups directives are processed in the following
              order: DenyGroups, AllowGroups.
 
              See PATTERNS in ssh_config(5) for more information on patterns.
              This keyword may appear multiple times in sshd_config with each
              instance appending to the list.
 
      DenyUsers
              This keyword can be followed by a list of user name patterns,
              separated by spaces.  Login is disallowed for user names that
              match one of the patterns.  Only user names are valid; a
              numerical user ID is not recognized.  By default, login is
              allowed for all users.  If the pattern takes the form USER@HOST
              then USER and HOST are separately checked, restricting logins to
              particular users from particular hosts.  HOST criteria may
              additionally contain addresses to match in CIDR address/masklen
              format.  The allow/deny users directives are processed in the
              following order: DenyUsers, AllowUsers.
 
              See PATTERNS in ssh_config(5) for more information on patterns.
              This keyword may appear multiple times in sshd_config with each
              instance appending to the list.
 
      DisableForwarding
              Disables all forwarding features, including X11, ssh-agent(1),
              TCP and StreamLocal.  This option overrides all other forwarding-
              related options and may simplify restricted configurations.
 
      ExposeAuthInfo
              Writes a temporary file containing a list of authentication
              methods and public credentials (e.g. keys) used to authenticate
              the user.  The location of the file is exposed to the user
              session through the SSH_USER_AUTH environment variable.  The
              default is no.
 
      FingerprintHash
              Specifies the hash algorithm used when logging key fingerprints.
              Valid options are: md5 and sha256.  The default is sha256.
 
      ForceCommand
              Forces the execution of the command specified by ForceCommand,
              ignoring any command supplied by the client and ~/.ssh/rc if
              present.  The command is invoked by using the user's login shell
              with the -c option.  This applies to shell, command, or subsystem
              execution.  It is most useful inside a Match block.  The command
              originally supplied by the client is available in the
              SSH_ORIGINAL_COMMAND environment variable.  Specifying a command
              of internal-sftp will force the use of an in-process SFTP server
              that requires no support files when used with ChrootDirectory.
              The default is none.
 
      GatewayPorts
              Specifies whether remote hosts are allowed to connect to ports
              forwarded for the client.  By default, sshd(8) binds remote port
              forwardings to the loopback address.  This prevents other remote
              hosts from connecting to forwarded ports.  GatewayPorts can be
              used to specify that sshd should allow remote port forwardings to
              bind to non-loopback addresses, thus allowing other hosts to
              connect.  The argument may be no to force remote port forwardings
              to be available to the local host only, yes to force remote port
              forwardings to bind to the wildcard address, or clientspecified
              to allow the client to select the address to which the forwarding
              is bound.  The default is no.
 
      GSSAPIAuthentication
              Specifies whether user authentication based on GSSAPI is allowed.
              The default is no.
 
      GSSAPICleanupCredentials
              Specifies whether to automatically destroy the user's credentials
              cache on logout.  The default is yes.
 
      GSSAPIStrictAcceptorCheck
              Determines whether to be strict about the identity of the GSSAPI
              acceptor a client authenticates against.  If set to yes then the
              client must authenticate against the host service on the current
              hostname.  If set to no then the client may authenticate against
              any service key stored in the machine's default store.  This
              facility is provided to assist with operation on multi homed
              machines.  The default is yes.
 
      HostbasedAcceptedAlgorithms
              Specifies the signature algorithms that will be accepted for
              hostbased authentication as a list of comma-separated patterns.
              Alternately if the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character,
              then the specified signature algorithms will be appended to the
              default set instead of replacing them.  If the specified list
              begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified signature
              algorithms (including wildcards) will be removed from the default
              set instead of replacing them.  If the specified list begins with
              a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified signature algorithms will be
              placed at the head of the default set.  The default for this
              option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ssh-ed25519@openssh.com,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              The list of available signature algorithms may also be obtained
              using "ssh -Q HostbasedAcceptedAlgorithms".  This was formerly
              named HostbasedAcceptedKeyTypes.
 
      HostbasedAuthentication
              Specifies whether rhosts or /etc/hosts.equiv authentication
              together with successful public key client host authentication is
              allowed (host-based authentication).  The default is no.
 
      HostbasedUsesNameFromPacketOnly
              Specifies whether or not the server will attempt to perform a
              reverse name lookup when matching the name in the ~/.shosts,
              ~/.rhosts, and /etc/hosts.equiv files during
              HostbasedAuthentication.  A setting of yes means that sshd(8)
              uses the name supplied by the client rather than attempting to
              resolve the name from the TCP connection itself.  The default is
              no.
 
      HostCertificate
              Specifies a file containing a public host certificate.  The
              certificate's public key must match a private host key already
              specified by HostKey.  The default behaviour of sshd(8) is not to
              load any certificates.
 
      HostKey
              Specifies a file containing a private host key used by SSH.  The
              defaults are /etc/ssh/ssh_host_ecdsa_key,
              /etc/ssh/ssh_host_ed25519_key and /etc/ssh/ssh_host_rsa_key.
 
              Note that sshd(8) will refuse to use a file if it is group/world-
              accessible and that the HostKeyAlgorithms option restricts which
              of the keys are actually used by sshd(8).
 
              It is possible to have multiple host key files.  It is also
              possible to specify public host key files instead.  In this case
              operations on the private key will be delegated to an
              ssh-agent(1).
 
      HostKeyAgent
              Identifies the UNIX-domain socket used to communicate with an
              agent that has access to the private host keys.  If the string
              "SSH_AUTH_SOCK" is specified, the location of the socket will be
              read from the SSH_AUTH_SOCK environment variable.
 
      HostKeyAlgorithms
              Specifies the host key signature algorithms that the server
              offers.  The default for this option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ssh-ed25519@openssh.com,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              The list of available signature algorithms may also be obtained
              using "ssh -Q HostKeyAlgorithms".
 
      IgnoreRhosts
              Specifies whether to ignore per-user .rhosts and .shosts files
              during HostbasedAuthentication.  The system-wide /etc/hosts.equiv
              and /etc/shosts.equiv are still used regardless of this setting.
 
              Accepted values are yes (the default) to ignore all per-user
              files, shosts-only to allow the use of .shosts but to ignore
              .rhosts or no to allow both .shosts and rhosts.
 
      IgnoreUserKnownHosts
              Specifies whether sshd(8) should ignore the user's
              ~/.ssh/known_hosts during HostbasedAuthentication and use only
              the system-wide known hosts file /etc/ssh/ssh_known_hosts.  The
              default is M-bM-^@M-^\noM-bM-^@M-^].
 
      Include
              Include the specified configuration file(s).  Multiple pathnames
              may be specified and each pathname may contain glob(7) wildcards
              that will be expanded and processed in lexical order.  Files
              without absolute paths are assumed to be in /etc/ssh.  An Include
              directive may appear inside a Match block to perform conditional
              inclusion.
 
      IPQoS   Specifies the IPv4 type-of-service or DSCP class for the
              connection.  Accepted values are af11, af12, af13, af21, af22,
              af23, af31, af32, af33, af41, af42, af43, cs0, cs1, cs2, cs3,
              cs4, cs5, cs6, cs7, ef, le, lowdelay, throughput, reliability, a
              numeric value, or none to use the operating system default.  This
              option may take one or two arguments, separated by whitespace.
              If one argument is specified, it is used as the packet class
              unconditionally.  If two values are specified, the first is
              automatically selected for interactive sessions and the second
              for non-interactive sessions.  The default is af21 (Low-Latency
              Data) for interactive sessions and cs1 (Lower Effort) for non-
              interactive sessions.
 
      KbdInteractiveAuthentication
              Specifies whether to allow keyboard-interactive authentication.
              All authentication styles from login.conf(5) are supported.  The
              default is yes.  The argument to this keyword must be yes or no.
              ChallengeResponseAuthentication is a deprecated alias for this.
 
      KerberosAuthentication
              Specifies whether the password provided by the user for
              PasswordAuthentication will be validated through the Kerberos
              KDC.  To use this option, the server needs a Kerberos servtab
              which allows the verification of the KDC's identity.  The default
              is no.
 
      KerberosGetAFSToken
              If AFS is active and the user has a Kerberos 5 TGT, attempt to
              acquire an AFS token before accessing the user's home directory.
              The default is no.
 
      KerberosOrLocalPasswd
              If password authentication through Kerberos fails then the
              password will be validated via any additional local mechanism
              such as /etc/passwd.  The default is yes.
 
      KerberosTicketCleanup
              Specifies whether to automatically destroy the user's ticket
              cache file on logout.  The default is yes.
 
      KexAlgorithms
              Specifies the available KEX (Key Exchange) algorithms.  Multiple
              algorithms must be comma-separated.  Alternately if the specified
              list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the specified algorithms
              will be appended to the default set instead of replacing them.
              If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y character, then the
              specified algorithms (including wildcards) will be removed from
              the default set instead of replacing them.  If the specified list
              begins with a M-bM-^@M-^X^M-bM-^@M-^Y character, then the specified algorithms will
              be placed at the head of the default set.  The supported
              algorithms are:
 
                    curve25519-sha256
                    curve25519-sha256@libssh.org
                    diffie-hellman-group1-sha1
                    diffie-hellman-group14-sha1
                    diffie-hellman-group14-sha256
                    diffie-hellman-group16-sha512
                    diffie-hellman-group18-sha512
                    diffie-hellman-group-exchange-sha1
                    diffie-hellman-group-exchange-sha256
                    ecdh-sha2-nistp256
                    ecdh-sha2-nistp384
                    ecdh-sha2-nistp521
                    sntrup761x25519-sha512@openssh.com
 
              The default is:
 
                    sntrup761x25519-sha512@openssh.com,
                    curve25519-sha256,curve25519-sha256@libssh.org,
                    ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,
                    diffie-hellman-group-exchange-sha256,
                    diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,
                    diffie-hellman-group14-sha256
 
              The list of available key exchange algorithms may also be
              obtained using "ssh -Q KexAlgorithms".
 
      ListenAddress
              Specifies the local addresses sshd(8) should listen on.  The
              following forms may be used:
 
                    ListenAddress hostname|address [rdomain domain]
                    ListenAddress hostname:port [rdomain domain]
                    ListenAddress IPv4_address:port [rdomain domain]
                    ListenAddress [hostname|address]:port [rdomain domain]
 
              The optional rdomain qualifier requests sshd(8) listen in an
              explicit routing domain.  If port is not specified, sshd will
              listen on the address and all Port options specified.  The
              default is to listen on all local addresses on the current
              default routing domain.  Multiple ListenAddress options are
              permitted.  For more information on routing domains, see
              rdomain(4).
 
      LoginGraceTime
              The server disconnects after this time if the user has not
              successfully logged in.  If the value is 0, there is no time
              limit.  The default is 120 seconds.
 
      LogLevel
              Gives the verbosity level that is used when logging messages from
              sshd(8).  The possible values are: QUIET, FATAL, ERROR, INFO,
              VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.  The default is INFO.
              DEBUG and DEBUG1 are equivalent.  DEBUG2 and DEBUG3 each specify
              higher levels of debugging output.  Logging with a DEBUG level
              violates the privacy of users and is not recommended.
 
      LogVerbose
              Specify one or more overrides to LogLevel.  An override consists
              of a pattern lists that matches the source file, function and
              line number to force detailed logging for.  For example, an
              override pattern of:
 
                    kex.c:*:1000,*:kex_exchange_identification():*,packet.c:*
 
              would enable detailed logging for line 1000 of kex.c, everything
              in the kex_exchange_identification() function, and all code in
              the packet.c file.  This option is intended for debugging and no
              overrides are enabled by default.
 
      MACs    Specifies the available MAC (message authentication code)
              algorithms.  The MAC algorithm is used for data integrity
              protection.  Multiple algorithms must be comma-separated.  If the
              specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character, then the specified
              algorithms will be appended to the default set instead of
              replacing them.  If the specified list begins with a M-bM-^@M-^X-M-bM-^@M-^Y
              character, then the specified algorithms (including wildcards)
              will be removed from the default set instead of replacing them.
              If the specified list begins with a M-bM-^@M-^X^M-bM-^@M-^Y character, then the
              specified algorithms will be placed at the head of the default
              set.
 
              The algorithms that contain "-etm" calculate the MAC after
              encryption (encrypt-then-mac).  These are considered safer and
              their use recommended.  The supported MACs are:
 
                    hmac-md5
                    hmac-md5-96
                    hmac-sha1
                    hmac-sha1-96
                    hmac-sha2-256
                    hmac-sha2-512
                    umac-64@openssh.com
                    umac-128@openssh.com
                    hmac-md5-etm@openssh.com
                    hmac-md5-96-etm@openssh.com
                    hmac-sha1-etm@openssh.com
                    hmac-sha1-96-etm@openssh.com
                    hmac-sha2-256-etm@openssh.com
                    hmac-sha2-512-etm@openssh.com
                    umac-64-etm@openssh.com
                    umac-128-etm@openssh.com
 
              The default is:
 
                    umac-64-etm@openssh.com,umac-128-etm@openssh.com,
                    hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,
                    hmac-sha1-etm@openssh.com,
                    umac-64@openssh.com,umac-128@openssh.com,
                    hmac-sha2-256,hmac-sha2-512,hmac-sha1
 
              The list of available MAC algorithms may also be obtained using
              "ssh -Q mac".
 
      Match   Introduces a conditional block.  If all of the criteria on the
              Match line are satisfied, the keywords on the following lines
              override those set in the global section of the config file,
              until either another Match line or the end of the file.  If a
              keyword appears in multiple Match blocks that are satisfied, only
              the first instance of the keyword is applied.
 
              The arguments to Match are one or more criteria-pattern pairs or
              the single token All which matches all criteria.  The available
              criteria are User, Group, Host, LocalAddress, LocalPort, RDomain,
              and Address (with RDomain representing the rdomain(4) on which
              the connection was received).
 
              The match patterns may consist of single entries or comma-
              separated lists and may use the wildcard and negation operators
              described in the PATTERNS section of ssh_config(5).
 
              The patterns in an Address criteria may additionally contain
              addresses to match in CIDR address/masklen format, such as
              192.0.2.0/24 or 2001:db8::/32.  Note that the mask length
              provided must be consistent with the address - it is an error to
              specify a mask length that is too long for the address or one
              with bits set in this host portion of the address.  For example,
              192.0.2.0/33 and 192.0.2.0/8, respectively.
 
              Only a subset of keywords may be used on the lines following a
              Match keyword.  Available keywords are AcceptEnv,
              AllowAgentForwarding, AllowGroups, AllowStreamLocalForwarding,
              AllowTcpForwarding, AllowUsers, AuthenticationMethods,
              AuthorizedKeysCommand, AuthorizedKeysCommandUser,
              AuthorizedKeysFile, AuthorizedPrincipalsCommand,
              AuthorizedPrincipalsCommandUser, AuthorizedPrincipalsFile,
              Banner, CASignatureAlgorithms, ChannelTimeout, ChrootDirectory,
              ClientAliveCountMax, ClientAliveInterval, DenyGroups, DenyUsers,
              DisableForwarding, ExposeAuthInfo, ForceCommand, GatewayPorts,
              GSSAPIAuthentication, HostbasedAcceptedAlgorithms,
              HostbasedAuthentication, HostbasedUsesNameFromPacketOnly,
              IgnoreRhosts, Include, IPQoS, KbdInteractiveAuthentication,
              KerberosAuthentication, LogLevel, MaxAuthTries, MaxSessions,
              PasswordAuthentication, PermitEmptyPasswords, PermitListen,
              PermitOpen, PermitRootLogin, PermitTTY, PermitTunnel,
              PermitUserRC, PubkeyAcceptedAlgorithms, PubkeyAuthentication,
              PubkeyAuthOptions, RekeyLimit, RevokedKeys, RDomain, SetEnv,
              StreamLocalBindMask, StreamLocalBindUnlink, TrustedUserCAKeys,
              UnusedConnectionTimeout, X11DisplayOffset, X11Forwarding and
              X11UseLocalhost.
 
      MaxAuthTries
              Specifies the maximum number of authentication attempts permitted
              per connection.  Once the number of failures reaches half this
              value, additional failures are logged.  The default is 6.
 
      MaxSessions
              Specifies the maximum number of open shell, login or subsystem
              (e.g. sftp) sessions permitted per network connection.  Multiple
              sessions may be established by clients that support connection
              multiplexing.  Setting MaxSessions to 1 will effectively disable
              session multiplexing, whereas setting it to 0 will prevent all
              shell, login and subsystem sessions while still permitting
              forwarding.  The default is 10.
 
      MaxStartups
              Specifies the maximum number of concurrent unauthenticated
              connections to the SSH daemon.  Additional connections will be
              dropped until authentication succeeds or the LoginGraceTime
              expires for a connection.  The default is 10:30:100.
 
              Alternatively, random early drop can be enabled by specifying the
              three colon separated values start:rate:full (e.g. "10:30:60").
              sshd(8) will refuse connection attempts with a probability of
              rate/100 (30%) if there are currently start (10) unauthenticated
              connections.  The probability increases linearly and all
              connection attempts are refused if the number of unauthenticated
              connections reaches full (60).
 
      ModuliFile
              Specifies the moduli(5) file that contains the Diffie-Hellman
              groups used for the M-bM-^@M-^\diffie-hellman-group-exchange-sha1M-bM-^@M-^] and
              M-bM-^@M-^\diffie-hellman-group-exchange-sha256M-bM-^@M-^] key exchange methods.  The
              default is /etc/moduli.
 
      PasswordAuthentication
              Specifies whether password authentication is allowed.  The
              default is yes.
 
      PermitEmptyPasswords
              When password authentication is allowed, it specifies whether the
              server allows login to accounts with empty password strings.  The
              default is no.
 
      PermitListen
              Specifies the addresses/ports on which a remote TCP port
              forwarding may listen.  The listen specification must be one of
              the following forms:
 
                    PermitListen port
                    PermitListen host:port
 
              Multiple permissions may be specified by separating them with
              whitespace.  An argument of any can be used to remove all
              restrictions and permit any listen requests.  An argument of none
              can be used to prohibit all listen requests.  The host name may
              contain wildcards as described in the PATTERNS section in
              ssh_config(5).  The wildcard M-bM-^@M-^X*M-bM-^@M-^Y can also be used in place of a
              port number to allow all ports.  By default all port forwarding
              listen requests are permitted.  Note that the GatewayPorts option
              may further restrict which addresses may be listened on.  Note
              also that ssh(1) will request a listen host of M-bM-^@M-^\localhostM-bM-^@M-^] if no
              listen host was specifically requested, and this name is treated
              differently to explicit localhost addresses of M-bM-^@M-^\127.0.0.1M-bM-^@M-^] and
              M-bM-^@M-^\::1M-bM-^@M-^].
 
      PermitOpen
              Specifies the destinations to which TCP port forwarding is
              permitted.  The forwarding specification must be one of the
              following forms:
 
                    PermitOpen host:port
                    PermitOpen IPv4_addr:port
                    PermitOpen [IPv6_addr]:port
 
              Multiple forwards may be specified by separating them with
              whitespace.  An argument of any can be used to remove all
              restrictions and permit any forwarding requests.  An argument of
              none can be used to prohibit all forwarding requests.  The
              wildcard M-bM-^@M-^X*M-bM-^@M-^Y can be used for host or port to allow all hosts or
              ports respectively.  Otherwise, no pattern matching or address
              lookups are performed on supplied names.  By default all port
              forwarding requests are permitted.
 
      PermitRootLogin
              Specifies whether root can log in using ssh(1).  The argument
              must be yes, prohibit-password, forced-commands-only, or no.  The
              default is prohibit-password.
 
              If this option is set to prohibit-password (or its deprecated
              alias, without-password), password and keyboard-interactive
              authentication are disabled for root.
 
              If this option is set to forced-commands-only, root login with
              public key authentication will be allowed, but only if the
              command option has been specified (which may be useful for taking
              remote backups even if root login is normally not allowed).  All
              other authentication methods are disabled for root.
 
              If this option is set to no, root is not allowed to log in.
 
      PermitTTY
              Specifies whether pty(4) allocation is permitted.  The default is
              yes.
 
      PermitTunnel
              Specifies whether tun(4) device forwarding is allowed.  The
              argument must be yes, point-to-point (layer 3), ethernet (layer
              2), or no.  Specifying yes permits both point-to-point and
              ethernet.  The default is no.
 
              Independent of this setting, the permissions of the selected
              tun(4) device must allow access to the user.
 
      PermitUserEnvironment
              Specifies whether ~/.ssh/environment and environment= options in
              ~/.ssh/authorized_keys are processed by sshd(8).  Valid options
              are yes, no or a pattern-list specifying which environment
              variable names to accept (for example "LANG,LC_*").  The default
              is no.  Enabling environment processing may enable users to
              bypass access restrictions in some configurations using
              mechanisms such as LD_PRELOAD.
 
      PermitUserRC
              Specifies whether any ~/.ssh/rc file is executed.  The default is
              yes.
 
      PerSourceMaxStartups
              Specifies the number of unauthenticated connections allowed from
              a given source address, or M-bM-^@M-^\noneM-bM-^@M-^] if there is no limit.  This
              limit is applied in addition to MaxStartups, whichever is lower.
              The default is none.
 
      PerSourceNetBlockSize
              Specifies the number of bits of source address that are grouped
              together for the purposes of applying PerSourceMaxStartups
              limits.  Values for IPv4 and optionally IPv6 may be specified,
              separated by a colon.  The default is 32:128, which means each
              address is considered individually.
 
      PidFile
              Specifies the file that contains the process ID of the SSH
              daemon, or none to not write one.  The default is
              /var/run/sshd.pid.
 
      Port    Specifies the port number that sshd(8) listens on.  The default
              is 22.  Multiple options of this type are permitted.  See also
              ListenAddress.
 
      PrintLastLog
              Specifies whether sshd(8) should print the date and time of the
              last user login when a user logs in interactively.  The default
              is yes.
 
      PrintMotd
              Specifies whether sshd(8) should print /etc/motd when a user logs
              in interactively.  (On some systems it is also printed by the
              shell, /etc/profile, or equivalent.)  The default is yes.
 
      PubkeyAcceptedAlgorithms
              Specifies the signature algorithms that will be accepted for
              public key authentication as a list of comma-separated patterns.
              Alternately if the specified list begins with a M-bM-^@M-^X+M-bM-^@M-^Y character,
              then the specified algorithms will be appended to the default set
              instead of replacing them.  If the specified list begins with a
              M-bM-^@M-^X-M-bM-^@M-^Y character, then the specified algorithms (including
              wildcards) will be removed from the default set instead of
              replacing them.  If the specified list begins with a M-bM-^@M-^X^M-bM-^@M-^Y
              character, then the specified algorithms will be placed at the
              head of the default set.  The default for this option is:
 
                 ssh-ed25519-cert-v01@openssh.com,
                 ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 ecdsa-sha2-nistp384-cert-v01@openssh.com,
                 ecdsa-sha2-nistp521-cert-v01@openssh.com,
                 sk-ssh-ed25519-cert-v01@openssh.com,
                 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
                 rsa-sha2-512-cert-v01@openssh.com,
                 rsa-sha2-256-cert-v01@openssh.com,
                 ssh-ed25519,
                 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
                 sk-ssh-ed25519@openssh.com,
                 sk-ecdsa-sha2-nistp256@openssh.com,
                 rsa-sha2-512,rsa-sha2-256
 
              The list of available signature algorithms may also be obtained
              using "ssh -Q PubkeyAcceptedAlgorithms".
 
      PubkeyAuthOptions
              Sets one or more public key authentication options.  The
              supported keywords are: none (the default; indicating no
              additional options are enabled), touch-required and
              verify-required.
 
              The touch-required option causes public key authentication using
              a FIDO authenticator algorithm (i.e. ecdsa-sk or ed25519-sk) to
              always require the signature to attest that a physically present
              user explicitly confirmed the authentication (usually by touching
              the authenticator).  By default, sshd(8) requires user presence
              unless overridden with an authorized_keys option.  The
              touch-required flag disables this override.
 
              The verify-required option requires a FIDO key signature attest
              that the user was verified, e.g. via a PIN.
 
              Neither the touch-required or verify-required options have any
              effect for other, non-FIDO, public key types.
 
      PubkeyAuthentication
              Specifies whether public key authentication is allowed.  The
              default is yes.
 
      RekeyLimit
              Specifies the maximum amount of data that may be transmitted or
              received before the session key is renegotiated, optionally
              followed by a maximum amount of time that may pass before the
              session key is renegotiated.  The first argument is specified in
              bytes and may have a suffix of M-bM-^@M-^XKM-bM-^@M-^Y, M-bM-^@M-^XMM-bM-^@M-^Y, or M-bM-^@M-^XGM-bM-^@M-^Y to indicate
              Kilobytes, Megabytes, or Gigabytes, respectively.  The default is
              between M-bM-^@M-^X1GM-bM-^@M-^Y and M-bM-^@M-^X4GM-bM-^@M-^Y, depending on the cipher.  The optional
              second value is specified in seconds and may use any of the units
              documented in the TIME FORMATS section.  The default value for
              RekeyLimit is default none, which means that rekeying is
              performed after the cipher's default amount of data has been sent
              or received and no time based rekeying is done.
 
      RequiredRSASize
              Specifies the minimum RSA key size (in bits) that sshd(8) will
              accept.  User and host-based authentication keys smaller than
              this limit will be refused.  The default is 1024 bits.  Note that
              this limit may only be raised from the default.
 
      RevokedKeys
              Specifies revoked public keys file, or none to not use one.  Keys
              listed in this file will be refused for public key
              authentication.  Note that if this file is not readable, then
              public key authentication will be refused for all users.  Keys
              may be specified as a text file, listing one public key per line,
              or as an OpenSSH Key Revocation List (KRL) as generated by
              ssh-keygen(1).  For more information on KRLs, see the KEY
              REVOCATION LISTS section in ssh-keygen(1).
 
      RDomain
              Specifies an explicit routing domain that is applied after
              authentication has completed.  The user session, as well as any
              forwarded or listening IP sockets, will be bound to this
              rdomain(4).  If the routing domain is set to %D, then the domain
              in which the incoming connection was received will be applied.
 
      SecurityKeyProvider
              Specifies a path to a library that will be used when loading FIDO
              authenticator-hosted keys, overriding the default of using the
              built-in USB HID support.
 
      SetEnv  Specifies one or more environment variables to set in child
              sessions started by sshd(8) as M-bM-^@M-^\NAME=VALUEM-bM-^@M-^].  The environment
              value may be quoted (e.g. if it contains whitespace characters).
              Environment variables set by SetEnv override the default
              environment and any variables specified by the user via AcceptEnv
              or PermitUserEnvironment.
 
      StreamLocalBindMask
              Sets the octal file creation mode mask (umask) used when creating
              a Unix-domain socket file for local or remote port forwarding.
              This option is only used for port forwarding to a Unix-domain
              socket file.
 
              The default value is 0177, which creates a Unix-domain socket
              file that is readable and writable only by the owner.  Note that
              not all operating systems honor the file mode on Unix-domain
              socket files.
 
      StreamLocalBindUnlink
              Specifies whether to remove an existing Unix-domain socket file
              for local or remote port forwarding before creating a new one.
              If the socket file already exists and StreamLocalBindUnlink is
              not enabled, sshd will be unable to forward the port to the Unix-
              domain socket file.  This option is only used for port forwarding
              to a Unix-domain socket file.
 
              The argument must be yes or no.  The default is no.
 
      StrictModes
              Specifies whether sshd(8) should check file modes and ownership
              of the user's files and home directory before accepting login.
              This is normally desirable because novices sometimes accidentally
              leave their directory or files world-writable.  The default is
              yes.  Note that this does not apply to ChrootDirectory, whose
              permissions and ownership are checked unconditionally.
 
      Subsystem
              Configures an external subsystem (e.g. file transfer daemon).
              Arguments should be a subsystem name and a command (with optional
              arguments) to execute upon subsystem request.
 
              The command sftp-server implements the SFTP file transfer
              subsystem.
 
              Alternately the name internal-sftp implements an in-process SFTP
              server.  This may simplify configurations using ChrootDirectory
-             to force a different filesystem root on clients.
+             to force a different filesystem root on clients.  It accepts the
+             same command line arguments as sftp-server and even though it is
+             in-process, settings such as LogLevel or SyslogFacility do not
+             apply to it and must be set explicitly via command line
+             arguments.
 
              By default no subsystems are defined.
 
      SyslogFacility
              Gives the facility code that is used when logging messages from
              sshd(8).  The possible values are: DAEMON, USER, AUTH, LOCAL0,
              LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.  The
              default is AUTH.
 
      TCPKeepAlive
              Specifies whether the system should send TCP keepalive messages
              to the other side.  If they are sent, death of the connection or
              crash of one of the machines will be properly noticed.  However,
              this means that connections will die if the route is down
              temporarily, and some people find it annoying.  On the other
              hand, if TCP keepalives are not sent, sessions may hang
              indefinitely on the server, leaving "ghost" users and consuming
              server resources.
 
              The default is yes (to send TCP keepalive messages), and the
              server will notice if the network goes down or the client host
              crashes.  This avoids infinitely hanging sessions.
 
              To disable TCP keepalive messages, the value should be set to no.
 
      TrustedUserCAKeys
              Specifies a file containing public keys of certificate
              authorities that are trusted to sign user certificates for
              authentication, or none to not use one.  Keys are listed one per
              line; empty lines and comments starting with M-bM-^@M-^X#M-bM-^@M-^Y are allowed.  If
              a certificate is presented for authentication and has its signing
              CA key listed in this file, then it may be used for
              authentication for any user listed in the certificate's
              principals list.  Note that certificates that lack a list of
              principals will not be permitted for authentication using
              TrustedUserCAKeys.  For more details on certificates, see the
              CERTIFICATES section in ssh-keygen(1).
 
      UnusedConnectionTimeout
              Specifies whether and how quickly sshd(8) should close client
              connections with no open channels.  Open channels include active
              shell, command execution or subsystem sessions, connected
              network, socket, agent or X11 forwardings.  Forwarding listeners,
              such as those from the ssh(1) -R flag, are not considered as open
              channels and do not prevent the timeout.  The timeout value is
              specified in seconds or may use any of the units documented in
              the TIME FORMATS section.
 
              Note that this timeout starts when the client connection
              completes user authentication but before the client has an
              opportunity to open any channels.  Caution should be used when
              using short timeout values, as they may not provide sufficient
              time for the client to request and open its channels before
              terminating the connection.
 
              The default none is to never expire connections for having no
              open channels.  This option may be useful in conjunction with
              ChannelTimeout.
 
      UseDNS  Specifies whether sshd(8) should look up the remote host name,
              and to check that the resolved host name for the remote IP
              address maps back to the very same IP address.
 
              If this option is set to no (the default) then only addresses and
              not host names may be used in ~/.ssh/authorized_keys from and
              sshd_config Match Host directives.
 
      UsePAM  Enables the Pluggable Authentication Module interface.  If set to
              yes this will enable PAM authentication using
              KbdInteractiveAuthentication and PasswordAuthentication in
              addition to PAM account and session module processing for all
              authentication types.
 
              Because PAM keyboard-interactive authentication usually serves an
              equivalent role to password authentication, you should disable
              either PasswordAuthentication or KbdInteractiveAuthentication.
 
              If UsePAM is enabled, you will not be able to run sshd(8) as a
              non-root user.  The default is no.
 
      VersionAddendum
              Optionally specifies additional text to append to the SSH
              protocol banner sent by the server upon connection.  The default
              is none.
 
      X11DisplayOffset
              Specifies the first display number available for sshd(8)'s X11
              forwarding.  This prevents sshd from interfering with real X11
              servers.  The default is 10.
 
      X11Forwarding
              Specifies whether X11 forwarding is permitted.  The argument must
              be yes or no.  The default is no.
 
              When X11 forwarding is enabled, there may be additional exposure
              to the server and to client displays if the sshd(8) proxy display
              is configured to listen on the wildcard address (see
              X11UseLocalhost), though this is not the default.  Additionally,
              the authentication spoofing and authentication data verification
              and substitution occur on the client side.  The security risk of
              using X11 forwarding is that the client's X11 display server may
              be exposed to attack when the SSH client requests forwarding (see
              the warnings for ForwardX11 in ssh_config(5)).  A system
              administrator may have a stance in which they want to protect
              clients that may expose themselves to attack by unwittingly
              requesting X11 forwarding, which can warrant a no setting.
 
              Note that disabling X11 forwarding does not prevent users from
              forwarding X11 traffic, as users can always install their own
              forwarders.
 
      X11UseLocalhost
              Specifies whether sshd(8) should bind the X11 forwarding server
              to the loopback address or to the wildcard address.  By default,
              sshd binds the forwarding server to the loopback address and sets
              the hostname part of the DISPLAY environment variable to
              localhost.  This prevents remote hosts from connecting to the
              proxy display.  However, some older X11 clients may not function
              with this configuration.  X11UseLocalhost may be set to no to
              specify that the forwarding server should be bound to the
              wildcard address.  The argument must be yes or no.  The default
              is yes.
 
      XAuthLocation
              Specifies the full pathname of the xauth(1) program, or none to
              not use one.  The default is /usr/X11R6/bin/xauth.
 
 TIME FORMATS
      sshd(8) command-line arguments and configuration file options that
      specify time may be expressed using a sequence of the form:
      time[qualifier], where time is a positive integer value and qualifier is
      one of the following:
 
            M-bM-^_M-(noneM-bM-^_M-)  seconds
            s | S   seconds
            m | M   minutes
            h | H   hours
            d | D   days
            w | W   weeks
 
      Each member of the sequence is added together to calculate the total time
      value.
 
      Time format examples:
 
            600     600 seconds (10 minutes)
            10m     10 minutes
            1h30m   1 hour 30 minutes (90 minutes)
 
 TOKENS
      Arguments to some keywords can make use of tokens, which are expanded at
      runtime:
 
            %%    A literal M-bM-^@M-^X%M-bM-^@M-^Y.
            %C    Identifies the connection endpoints, containing four space-
                  separated values: client address, client port number, server
                  address, and server port number.
            %D    The routing domain in which the incoming connection was
                  received.
            %F    The fingerprint of the CA key.
            %f    The fingerprint of the key or certificate.
            %h    The home directory of the user.
            %i    The key ID in the certificate.
            %K    The base64-encoded CA key.
            %k    The base64-encoded key or certificate for authentication.
            %s    The serial number of the certificate.
            %T    The type of the CA key.
            %t    The key or certificate type.
            %U    The numeric user ID of the target user.
            %u    The username.
 
      AuthorizedKeysCommand accepts the tokens %%, %C, %D, %f, %h, %k, %t, %U,
      and %u.
 
      AuthorizedKeysFile accepts the tokens %%, %h, %U, and %u.
 
      AuthorizedPrincipalsCommand accepts the tokens %%, %C, %D, %F, %f, %h,
      %i, %K, %k, %s, %T, %t, %U, and %u.
 
      AuthorizedPrincipalsFile accepts the tokens %%, %h, %U, and %u.
 
      ChrootDirectory accepts the tokens %%, %h, %U, and %u.
 
      RoutingDomain accepts the token %D.
 
 FILES
      /etc/ssh/sshd_config
              Contains configuration data for sshd(8).  This file should be
              writable by root only, but it is recommended (though not
              necessary) that it be world-readable.
 
 SEE ALSO
      sftp-server(8), sshd(8)
 
 AUTHORS
      OpenSSH is a derivative of the original and free ssh 1.2.12 release by
      Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
      de Raadt and Dug Song removed many bugs, re-added newer features and
      created OpenSSH.  Markus Friedl contributed the support for SSH protocol
      versions 1.5 and 2.0.  Niels Provos and Markus Friedl contributed support
      for privilege separation.
 
-OpenBSD 7.3                      July 28, 2023                     OpenBSD 7.3
+OpenBSD 7.5                    February 21, 2024                   OpenBSD 7.5
diff --git a/sshd_config.5 b/sshd_config.5
index 7e1a56cd0e64..a0f16874f065 100644
--- a/sshd_config.5
+++ b/sshd_config.5
@@ -1,2098 +1,2115 @@
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 .\"                    All rights reserved
 .\"
 .\" As far as I am concerned, the code I have written for this software
 .\" can be used freely for any purpose.  Any derived versions of this
 .\" software must be clearly marked as such, and if the derived work is
 .\" incompatible with the protocol description in the RFC file, it must be
 .\" called by a name other than "ssh" or "Secure Shell".
 .\"
 .\" Copyright (c) 1999,2000 Markus Friedl.  All rights reserved.
 .\" Copyright (c) 1999 Aaron Campbell.  All rights reserved.
 .\" Copyright (c) 1999 Theo de Raadt.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd_config.5,v 1.350 2023/07/28 05:42:36 jmc Exp $
-.Dd $Mdocdate: July 28 2023 $
+.\" $OpenBSD: sshd_config.5,v 1.355 2024/02/21 06:17:29 djm Exp $
+.Dd $Mdocdate: February 21 2024 $
 .Dt SSHD_CONFIG 5
 .Os
 .Sh NAME
 .Nm sshd_config
 .Nd OpenSSH daemon configuration file
 .Sh DESCRIPTION
 .Xr sshd 8
 reads configuration data from
 .Pa /etc/ssh/sshd_config
 (or the file specified with
 .Fl f
 on the command line).
 The file contains keyword-argument pairs, one per line.
 Unless noted otherwise, for each keyword, the first obtained value will be used.
 Lines starting with
 .Ql #
 and empty lines are interpreted as comments.
 Arguments may optionally be enclosed in double quotes
 .Pq \&"
 in order to represent arguments containing spaces.
 .Pp
 The possible
 keywords and their meanings are as follows (note that
 keywords are case-insensitive and arguments are case-sensitive):
 .Bl -tag -width Ds
 .It Cm AcceptEnv
 Specifies what environment variables sent by the client will be copied into
 the session's
 .Xr environ 7 .
 See
 .Cm SendEnv
 and
 .Cm SetEnv
 in
 .Xr ssh_config 5
 for how to configure the client.
 The
 .Ev TERM
 environment variable is always accepted whenever the client
 requests a pseudo-terminal as it is required by the protocol.
 Variables are specified by name, which may contain the wildcard characters
 .Ql *
 and
 .Ql \&? .
 Multiple environment variables may be separated by whitespace or spread
 across multiple
 .Cm AcceptEnv
 directives.
 Be warned that some environment variables could be used to bypass restricted
 user environments.
 For this reason, care should be taken in the use of this directive.
 The default is not to accept any environment variables.
 .It Cm AddressFamily
 Specifies which address family should be used by
 .Xr sshd 8 .
 Valid arguments are
 .Cm any
 (the default),
 .Cm inet
 (use IPv4 only), or
 .Cm inet6
 (use IPv6 only).
 .It Cm AllowAgentForwarding
 Specifies whether
 .Xr ssh-agent 1
 forwarding is permitted.
 The default is
 .Cm yes .
 Note that disabling agent forwarding does not improve security
 unless users are also denied shell access, as they can always install
 their own forwarders.
 .It Cm AllowGroups
 This keyword can be followed by a list of group name patterns, separated
 by spaces.
 If specified, login is allowed only for users whose primary
 group or supplementary group list matches one of the patterns.
 Only group names are valid; a numerical group ID is not recognized.
 By default, login is allowed for all groups.
 The allow/deny groups directives are processed in the following order:
 .Cm DenyGroups ,
 .Cm AllowGroups .
 .Pp
 See PATTERNS in
 .Xr ssh_config 5
 for more information on patterns.
 This keyword may appear multiple times in
 .Nm
 with each instance appending to the list.
 .It Cm AllowStreamLocalForwarding
 Specifies whether StreamLocal (Unix-domain socket) forwarding is permitted.
 The available options are
 .Cm yes
 (the default)
 or
 .Cm all
 to allow StreamLocal forwarding,
 .Cm no
 to prevent all StreamLocal forwarding,
 .Cm local
 to allow local (from the perspective of
 .Xr ssh 1 )
 forwarding only or
 .Cm remote
 to allow remote forwarding only.
 Note that disabling StreamLocal forwarding does not improve security unless
 users are also denied shell access, as they can always install their
 own forwarders.
 .It Cm AllowTcpForwarding
 Specifies whether TCP forwarding is permitted.
 The available options are
 .Cm yes
 (the default)
 or
 .Cm all
 to allow TCP forwarding,
 .Cm no
 to prevent all TCP forwarding,
 .Cm local
 to allow local (from the perspective of
 .Xr ssh 1 )
 forwarding only or
 .Cm remote
 to allow remote forwarding only.
 Note that disabling TCP forwarding does not improve security unless
 users are also denied shell access, as they can always install their
 own forwarders.
 .It Cm AllowUsers
 This keyword can be followed by a list of user name patterns, separated
 by spaces.
 If specified, login is allowed only for user names that
 match one of the patterns.
 Only user names are valid; a numerical user ID is not recognized.
 By default, login is allowed for all users.
 If the pattern takes the form USER@HOST then USER and HOST
 are separately checked, restricting logins to particular
 users from particular hosts.
 HOST criteria may additionally contain addresses to match in CIDR
 address/masklen format.
 The allow/deny users directives are processed in the following order:
 .Cm DenyUsers ,
 .Cm AllowUsers .
 .Pp
 See PATTERNS in
 .Xr ssh_config 5
 for more information on patterns.
 This keyword may appear multiple times in
 .Nm
 with each instance appending to the list.
 .It Cm AuthenticationMethods
 Specifies the authentication methods that must be successfully completed
 for a user to be granted access.
 This option must be followed by one or more lists of comma-separated
 authentication method names, or by the single string
 .Cm any
 to indicate the default behaviour of accepting any single authentication
 method.
 If the default is overridden, then successful authentication requires
 completion of every method in at least one of these lists.
 .Pp
 For example,
 .Qq publickey,password publickey,keyboard-interactive
 would require the user to complete public key authentication, followed by
 either password or keyboard interactive authentication.
 Only methods that are next in one or more lists are offered at each stage,
 so for this example it would not be possible to attempt password or
 keyboard-interactive authentication before public key.
 .Pp
 For keyboard interactive authentication it is also possible to
 restrict authentication to a specific device by appending a
 colon followed by the device identifier
 .Cm bsdauth
 or
 .Cm pam .
 depending on the server configuration.
 For example,
 .Qq keyboard-interactive:bsdauth
 would restrict keyboard interactive authentication to the
 .Cm bsdauth
 device.
 .Pp
 If the publickey method is listed more than once,
 .Xr sshd 8
 verifies that keys that have been used successfully are not reused for
 subsequent authentications.
 For example,
 .Qq publickey,publickey
 requires successful authentication using two different public keys.
 .Pp
 Note that each authentication method listed should also be explicitly enabled
 in the configuration.
 .Pp
 The available authentication methods are:
 .Qq gssapi-with-mic ,
 .Qq hostbased ,
 .Qq keyboard-interactive ,
 .Qq none
 (used for access to password-less accounts when
 .Cm PermitEmptyPasswords
 is enabled),
 .Qq password
 and
 .Qq publickey .
 .It Cm AuthorizedKeysCommand
 Specifies a program to be used to look up the user's public keys.
 The program must be owned by root, not writable by group or others and
 specified by an absolute path.
 Arguments to
 .Cm AuthorizedKeysCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 If no arguments are specified then the username of the target user is used.
 .Pp
 The program should produce on standard output zero or
 more lines of authorized_keys output (see
 .Sx AUTHORIZED_KEYS
 in
 .Xr sshd 8 ) .
 .Cm AuthorizedKeysCommand
 is tried after the usual
 .Cm AuthorizedKeysFile
 files and will not be executed if a matching key is found there.
 By default, no
 .Cm AuthorizedKeysCommand
 is run.
 .It Cm AuthorizedKeysCommandUser
 Specifies the user under whose account the
 .Cm AuthorizedKeysCommand
 is run.
 It is recommended to use a dedicated user that has no other role on the host
 than running authorized keys commands.
 If
 .Cm AuthorizedKeysCommand
 is specified but
 .Cm AuthorizedKeysCommandUser
 is not, then
 .Xr sshd 8
 will refuse to start.
 .It Cm AuthorizedKeysFile
 Specifies the file that contains the public keys used for user authentication.
 The format is described in the AUTHORIZED_KEYS FILE FORMAT section of
 .Xr sshd 8 .
 Arguments to
 .Cm AuthorizedKeysFile
 accept the tokens described in the
 .Sx TOKENS
 section.
 After expansion,
 .Cm AuthorizedKeysFile
 is taken to be an absolute path or one relative to the user's home
 directory.
 Multiple files may be listed, separated by whitespace.
 Alternately this option may be set to
 .Cm none
 to skip checking for user keys in files.
 The default is
 .Qq .ssh/authorized_keys .ssh/authorized_keys2 .
 .It Cm AuthorizedPrincipalsCommand
 Specifies a program to be used to generate the list of allowed
 certificate principals as per
 .Cm AuthorizedPrincipalsFile .
 The program must be owned by root, not writable by group or others and
 specified by an absolute path.
 Arguments to
 .Cm AuthorizedPrincipalsCommand
 accept the tokens described in the
 .Sx TOKENS
 section.
 If no arguments are specified then the username of the target user is used.
 .Pp
 The program should produce on standard output zero or
 more lines of
 .Cm AuthorizedPrincipalsFile
 output.
 If either
 .Cm AuthorizedPrincipalsCommand
 or
 .Cm AuthorizedPrincipalsFile
 is specified, then certificates offered by the client for authentication
 must contain a principal that is listed.
 By default, no
 .Cm AuthorizedPrincipalsCommand
 is run.
 .It Cm AuthorizedPrincipalsCommandUser
 Specifies the user under whose account the
 .Cm AuthorizedPrincipalsCommand
 is run.
 It is recommended to use a dedicated user that has no other role on the host
 than running authorized principals commands.
 If
 .Cm AuthorizedPrincipalsCommand
 is specified but
 .Cm AuthorizedPrincipalsCommandUser
 is not, then
 .Xr sshd 8
 will refuse to start.
 .It Cm AuthorizedPrincipalsFile
 Specifies a file that lists principal names that are accepted for
 certificate authentication.
 When using certificates signed by a key listed in
 .Cm TrustedUserCAKeys ,
 this file lists names, one of which must appear in the certificate for it
 to be accepted for authentication.
 Names are listed one per line preceded by key options (as described in
 .Sx AUTHORIZED_KEYS FILE FORMAT
 in
 .Xr sshd 8 ) .
 Empty lines and comments starting with
 .Ql #
 are ignored.
 .Pp
 Arguments to
 .Cm AuthorizedPrincipalsFile
 accept the tokens described in the
 .Sx TOKENS
 section.
 After expansion,
 .Cm AuthorizedPrincipalsFile
 is taken to be an absolute path or one relative to the user's home directory.
 The default is
 .Cm none ,
 i.e. not to use a principals file \(en in this case, the username
 of the user must appear in a certificate's principals list for it to be
 accepted.
 .Pp
 Note that
 .Cm AuthorizedPrincipalsFile
 is only used when authentication proceeds using a CA listed in
 .Cm TrustedUserCAKeys
 and is not consulted for certification authorities trusted via
 .Pa ~/.ssh/authorized_keys ,
 though the
 .Cm principals=
 key option offers a similar facility (see
 .Xr sshd 8
 for details).
 .It Cm Banner
 The contents of the specified file are sent to the remote user before
 authentication is allowed.
 If the argument is
 .Cm none
 then no banner is displayed.
 By default, no banner is displayed.
 .It Cm CASignatureAlgorithms
 Specifies which algorithms are allowed for signing of certificates
 by certificate authorities (CAs).
 The default is:
 .Bd -literal -offset indent
 ssh-ed25519,ecdsa-sha2-nistp256,
 ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 If the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 .Pp
 Certificates signed using other algorithms will not be accepted for
 public key or host-based authentication.
 .It Cm ChannelTimeout
 Specifies whether and how quickly
 .Xr sshd 8
 should close inactive channels.
 Timeouts are specified as one or more
 .Dq type=interval
 pairs separated by whitespace, where the
 .Dq type
-must be a channel type name (as described in the table below), optionally
-containing wildcard characters.
+must be the special keyword
+.Dq global
+or a channel type name from the list below, optionally containing
+wildcard characters.
 .Pp
 The timeout value
 .Dq interval
 is specified in seconds or may use any of the units documented in the
 .Sx TIME FORMATS
 section.
 For example,
-.Dq session:*=5m
-would cause all sessions to terminate after five minutes of inactivity.
+.Dq session=5m
+would cause interactive sessions to terminate after five minutes of
+inactivity.
 Specifying a zero value disables the inactivity timeout.
 .Pp
-The available channel types include:
+The special timeout
+.Dq global
+applies to all active channels, taken together.
+Traffic on any active channel will reset the timeout, but when the timeout
+expires then all open channels will be closed.
+Note that this global timeout is not matched by wildcards and must be
+specified explicitly.
+.Pp
+The available channel type names include:
 .Bl -tag -width Ds
 .It Cm agent-connection
 Open connections to
 .Xr ssh-agent 1 .
 .It Cm direct-tcpip , Cm direct-streamlocal@openssh.com
 Open TCP or Unix socket (respectively) connections that have
 been established from a
 .Xr ssh 1
 local forwarding, i.e.\&
 .Cm LocalForward
 or
 .Cm DynamicForward .
 .It Cm forwarded-tcpip , Cm forwarded-streamlocal@openssh.com
 Open TCP or Unix socket (respectively) connections that have been
 established to a
 .Xr sshd 8
 listening on behalf of a
 .Xr ssh 1
 remote forwarding, i.e.\&
 .Cm RemoteForward .
-.It Cm session:command
-Command execution sessions.
-.It Cm session:shell
-Interactive shell sessions.
-.It Cm session:subsystem:...
-Subsystem sessions, e.g. for
+.It Cm session
+The interactive main session, including shell session, command execution,
+.Xr scp 1 ,
 .Xr sftp 1 ,
-which could be identified as
-.Cm session:subsystem:sftp .
+etc.
+.It Cm tun-connection
+Open
+.Cm TunnelForward
+connections.
 .It Cm x11-connection
 Open X11 forwarding sessions.
 .El
 .Pp
 Note that in all the above cases, terminating an inactive session does not
 guarantee to remove all resources associated with the session, e.g. shell
 processes or X11 clients relating to the session may continue to execute.
 .Pp
 Moreover, terminating an inactive channel or session does not necessarily
 close the SSH connection, nor does it prevent a client from
 requesting another channel of the same type.
 In particular, expiring an inactive forwarding session does not prevent
 another identical forwarding from being subsequently created.
-See also
-.Cm UnusedConnectionTimeout ,
-which may be used in conjunction with this option.
 .Pp
 The default is not to expire channels of any type for inactivity.
 .It Cm ChrootDirectory
 Specifies the pathname of a directory to
 .Xr chroot 2
 to after authentication.
 At session startup
 .Xr sshd 8
 checks that all components of the pathname are root-owned directories
-which are not writable by any other user or group.
+which are not writable by group or others.
 After the chroot,
 .Xr sshd 8
 changes the working directory to the user's home directory.
 Arguments to
 .Cm ChrootDirectory
 accept the tokens described in the
 .Sx TOKENS
 section.
 .Pp
 The
 .Cm ChrootDirectory
 must contain the necessary files and directories to support the
 user's session.
 For an interactive session this requires at least a shell, typically
 .Xr sh 1 ,
 and basic
 .Pa /dev
 nodes such as
 .Xr null 4 ,
 .Xr zero 4 ,
 .Xr stdin 4 ,
 .Xr stdout 4 ,
 .Xr stderr 4 ,
 and
 .Xr tty 4
 devices.
 For file transfer sessions using SFTP
 no additional configuration of the environment is necessary if the in-process
 sftp-server is used,
 though sessions which use logging may require
 .Pa /dev/log
 inside the chroot directory on some operating systems (see
 .Xr sftp-server 8
 for details).
 .Pp
 For safety, it is very important that the directory hierarchy be
 prevented from modification by other processes on the system (especially
 those outside the jail).
 Misconfiguration can lead to unsafe environments which
 .Xr sshd 8
 cannot detect.
 .Pp
 The default is
 .Cm none ,
 indicating not to
 .Xr chroot 2 .
 .It Cm Ciphers
 Specifies the ciphers allowed.
 Multiple ciphers must be comma-separated.
 If the specified list begins with a
 .Sq +
 character, then the specified ciphers will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified ciphers (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified ciphers will be placed at the head of the
 default set.
 .Pp
 The supported ciphers are:
 .Pp
 .Bl -item -compact -offset indent
 .It
 3des-cbc
 .It
 aes128-cbc
 .It
 aes192-cbc
 .It
 aes256-cbc
 .It
 aes128-ctr
 .It
 aes192-ctr
 .It
 aes256-ctr
 .It
 aes128-gcm@openssh.com
 .It
 aes256-gcm@openssh.com
 .It
 chacha20-poly1305@openssh.com
 .El
 .Pp
 The default is:
 .Bd -literal -offset indent
 chacha20-poly1305@openssh.com,
 aes128-ctr,aes192-ctr,aes256-ctr,
 aes128-gcm@openssh.com,aes256-gcm@openssh.com
 .Ed
 .Pp
 The list of available ciphers may also be obtained using
 .Qq ssh -Q cipher .
 .It Cm ClientAliveCountMax
 Sets the number of client alive messages which may be sent without
 .Xr sshd 8
 receiving any messages back from the client.
 If this threshold is reached while client alive messages are being sent,
 sshd will disconnect the client, terminating the session.
 It is important to note that the use of client alive messages is very
 different from
 .Cm TCPKeepAlive .
 The client alive messages are sent through the encrypted channel
 and therefore will not be spoofable.
 The TCP keepalive option enabled by
 .Cm TCPKeepAlive
 is spoofable.
 The client alive mechanism is valuable when the client or
 server depend on knowing when a connection has become unresponsive.
 .Pp
 The default value is 3.
 If
 .Cm ClientAliveInterval
 is set to 15, and
 .Cm ClientAliveCountMax
 is left at the default, unresponsive SSH clients
 will be disconnected after approximately 45 seconds.
 Setting a zero
 .Cm ClientAliveCountMax
 disables connection termination.
 .It Cm ClientAliveInterval
 Sets a timeout interval in seconds after which if no data has been received
 from the client,
 .Xr sshd 8
 will send a message through the encrypted
 channel to request a response from the client.
 The default
 is 0, indicating that these messages will not be sent to the client.
 .It Cm Compression
 Specifies whether compression is enabled after
 the user has authenticated successfully.
 The argument must be
 .Cm yes ,
 .Cm delayed
 (a legacy synonym for
 .Cm yes )
 or
 .Cm no .
 The default is
 .Cm yes .
 .It Cm DenyGroups
 This keyword can be followed by a list of group name patterns, separated
 by spaces.
 Login is disallowed for users whose primary group or supplementary
 group list matches one of the patterns.
 Only group names are valid; a numerical group ID is not recognized.
 By default, login is allowed for all groups.
 The allow/deny groups directives are processed in the following order:
 .Cm DenyGroups ,
 .Cm AllowGroups .
 .Pp
 See PATTERNS in
 .Xr ssh_config 5
 for more information on patterns.
 This keyword may appear multiple times in
 .Nm
 with each instance appending to the list.
 .It Cm DenyUsers
 This keyword can be followed by a list of user name patterns, separated
 by spaces.
 Login is disallowed for user names that match one of the patterns.
 Only user names are valid; a numerical user ID is not recognized.
 By default, login is allowed for all users.
 If the pattern takes the form USER@HOST then USER and HOST
 are separately checked, restricting logins to particular
 users from particular hosts.
 HOST criteria may additionally contain addresses to match in CIDR
 address/masklen format.
 The allow/deny users directives are processed in the following order:
 .Cm DenyUsers ,
 .Cm AllowUsers .
 .Pp
 See PATTERNS in
 .Xr ssh_config 5
 for more information on patterns.
 This keyword may appear multiple times in
 .Nm
 with each instance appending to the list.
 .It Cm DisableForwarding
 Disables all forwarding features, including X11,
 .Xr ssh-agent 1 ,
 TCP and StreamLocal.
 This option overrides all other forwarding-related options and may
 simplify restricted configurations.
 .It Cm ExposeAuthInfo
 Writes a temporary file containing a list of authentication methods and
 public credentials (e.g. keys) used to authenticate the user.
 The location of the file is exposed to the user session through the
 .Ev SSH_USER_AUTH
 environment variable.
 The default is
 .Cm no .
 .It Cm FingerprintHash
 Specifies the hash algorithm used when logging key fingerprints.
 Valid options are:
 .Cm md5
 and
 .Cm sha256 .
 The default is
 .Cm sha256 .
 .It Cm ForceCommand
 Forces the execution of the command specified by
 .Cm ForceCommand ,
 ignoring any command supplied by the client and
 .Pa ~/.ssh/rc
 if present.
 The command is invoked by using the user's login shell with the -c option.
 This applies to shell, command, or subsystem execution.
 It is most useful inside a
 .Cm Match
 block.
 The command originally supplied by the client is available in the
 .Ev SSH_ORIGINAL_COMMAND
 environment variable.
 Specifying a command of
 .Cm internal-sftp
 will force the use of an in-process SFTP server that requires no support
 files when used with
 .Cm ChrootDirectory .
 The default is
 .Cm none .
 .It Cm GatewayPorts
 Specifies whether remote hosts are allowed to connect to ports
 forwarded for the client.
 By default,
 .Xr sshd 8
 binds remote port forwardings to the loopback address.
 This prevents other remote hosts from connecting to forwarded ports.
 .Cm GatewayPorts
 can be used to specify that sshd
 should allow remote port forwardings to bind to non-loopback addresses, thus
 allowing other hosts to connect.
 The argument may be
 .Cm no
 to force remote port forwardings to be available to the local host only,
 .Cm yes
 to force remote port forwardings to bind to the wildcard address, or
 .Cm clientspecified
 to allow the client to select the address to which the forwarding is bound.
 The default is
 .Cm no .
 .It Cm GSSAPIAuthentication
 Specifies whether user authentication based on GSSAPI is allowed.
 The default is
 .Cm no .
 .It Cm GSSAPICleanupCredentials
 Specifies whether to automatically destroy the user's credentials cache
 on logout.
 The default is
 .Cm yes .
 .It Cm GSSAPIStrictAcceptorCheck
 Determines whether to be strict about the identity of the GSSAPI acceptor
 a client authenticates against.
 If set to
 .Cm yes
 then the client must authenticate against the host
 service on the current hostname.
 If set to
 .Cm no
 then the client may authenticate against any service key stored in the
 machine's default store.
 This facility is provided to assist with operation on multi homed machines.
 The default is
 .Cm yes .
 .It Cm HostbasedAcceptedAlgorithms
 Specifies the signature algorithms that will be accepted for hostbased
 authentication as a list of comma-separated patterns.
 Alternately if the specified list begins with a
 .Sq +
 character, then the specified signature algorithms will be appended to
 the default set instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified signature algorithms (including wildcards)
 will be removed from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified signature algorithms will be placed at
 the head of the default set.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 The list of available signature algorithms may also be obtained using
 .Qq ssh -Q HostbasedAcceptedAlgorithms .
 This was formerly named HostbasedAcceptedKeyTypes.
 .It Cm HostbasedAuthentication
 Specifies whether rhosts or /etc/hosts.equiv authentication together
 with successful public key client host authentication is allowed
 (host-based authentication).
 The default is
 .Cm no .
 .It Cm HostbasedUsesNameFromPacketOnly
 Specifies whether or not the server will attempt to perform a reverse
 name lookup when matching the name in the
 .Pa ~/.shosts ,
 .Pa ~/.rhosts ,
 and
 .Pa /etc/hosts.equiv
 files during
 .Cm HostbasedAuthentication .
 A setting of
 .Cm yes
 means that
 .Xr sshd 8
 uses the name supplied by the client rather than
 attempting to resolve the name from the TCP connection itself.
 The default is
 .Cm no .
 .It Cm HostCertificate
 Specifies a file containing a public host certificate.
 The certificate's public key must match a private host key already specified
 by
 .Cm HostKey .
 The default behaviour of
 .Xr sshd 8
 is not to load any certificates.
 .It Cm HostKey
 Specifies a file containing a private host key
 used by SSH.
 The defaults are
 .Pa /etc/ssh/ssh_host_ecdsa_key ,
 .Pa /etc/ssh/ssh_host_ed25519_key
 and
 .Pa /etc/ssh/ssh_host_rsa_key .
 .Pp
 Note that
 .Xr sshd 8
 will refuse to use a file if it is group/world-accessible
 and that the
 .Cm HostKeyAlgorithms
 option restricts which of the keys are actually used by
 .Xr sshd 8 .
 .Pp
 It is possible to have multiple host key files.
 It is also possible to specify public host key files instead.
 In this case operations on the private key will be delegated
 to an
 .Xr ssh-agent 1 .
 .It Cm HostKeyAgent
 Identifies the UNIX-domain socket used to communicate
 with an agent that has access to the private host keys.
 If the string
 .Qq SSH_AUTH_SOCK
 is specified, the location of the socket will be read from the
 .Ev SSH_AUTH_SOCK
 environment variable.
 .It Cm HostKeyAlgorithms
 Specifies the host key signature algorithms
 that the server offers.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 The list of available signature algorithms may also be obtained using
 .Qq ssh -Q HostKeyAlgorithms .
 .It Cm IgnoreRhosts
 Specifies whether to ignore per-user
 .Pa .rhosts
 and
 .Pa .shosts
 files during
 .Cm HostbasedAuthentication .
 The system-wide
 .Pa /etc/hosts.equiv
 and
 .Pa /etc/shosts.equiv
 are still used regardless of this setting.
 .Pp
 Accepted values are
 .Cm yes
 (the default) to ignore all per-user files,
 .Cm shosts-only
 to allow the use of
 .Pa .shosts
 but to ignore
 .Pa .rhosts
 or
 .Cm no
 to allow both
 .Pa .shosts
 and
 .Pa rhosts .
 .It Cm IgnoreUserKnownHosts
 Specifies whether
 .Xr sshd 8
 should ignore the user's
 .Pa ~/.ssh/known_hosts
 during
 .Cm HostbasedAuthentication
 and use only the system-wide known hosts file
 .Pa /etc/ssh/ssh_known_hosts .
 The default is
 .Dq no .
 .It Cm Include
 Include the specified configuration file(s).
 Multiple pathnames may be specified and each pathname may contain
 .Xr glob 7
 wildcards that will be expanded and processed in lexical order.
 Files without absolute paths are assumed to be in
 .Pa /etc/ssh .
 An
 .Cm Include
 directive may appear inside a
 .Cm Match
 block
 to perform conditional inclusion.
 .It Cm IPQoS
 Specifies the IPv4 type-of-service or DSCP class for the connection.
 Accepted values are
 .Cm af11 ,
 .Cm af12 ,
 .Cm af13 ,
 .Cm af21 ,
 .Cm af22 ,
 .Cm af23 ,
 .Cm af31 ,
 .Cm af32 ,
 .Cm af33 ,
 .Cm af41 ,
 .Cm af42 ,
 .Cm af43 ,
 .Cm cs0 ,
 .Cm cs1 ,
 .Cm cs2 ,
 .Cm cs3 ,
 .Cm cs4 ,
 .Cm cs5 ,
 .Cm cs6 ,
 .Cm cs7 ,
 .Cm ef ,
 .Cm le ,
 .Cm lowdelay ,
 .Cm throughput ,
 .Cm reliability ,
 a numeric value, or
 .Cm none
 to use the operating system default.
 This option may take one or two arguments, separated by whitespace.
 If one argument is specified, it is used as the packet class unconditionally.
 If two values are specified, the first is automatically selected for
 interactive sessions and the second for non-interactive sessions.
 The default is
 .Cm af21
 (Low-Latency Data)
 for interactive sessions and
 .Cm cs1
 (Lower Effort)
 for non-interactive sessions.
 .It Cm KbdInteractiveAuthentication
 Specifies whether to allow keyboard-interactive authentication.
 All authentication styles from
 .Xr login.conf 5
 are supported.
 The default is
 .Cm yes .
 The argument to this keyword must be
 .Cm yes
 or
 .Cm no .
 .Cm ChallengeResponseAuthentication
 is a deprecated alias for this.
 .It Cm KerberosAuthentication
 Specifies whether the password provided by the user for
 .Cm PasswordAuthentication
 will be validated through the Kerberos KDC.
 To use this option, the server needs a
 Kerberos servtab which allows the verification of the KDC's identity.
 The default is
 .Cm no .
 .It Cm KerberosGetAFSToken
 If AFS is active and the user has a Kerberos 5 TGT, attempt to acquire
 an AFS token before accessing the user's home directory.
 The default is
 .Cm no .
 .It Cm KerberosOrLocalPasswd
 If password authentication through Kerberos fails then
 the password will be validated via any additional local mechanism
 such as
 .Pa /etc/passwd .
 The default is
 .Cm yes .
 .It Cm KerberosTicketCleanup
 Specifies whether to automatically destroy the user's ticket cache
 file on logout.
 The default is
 .Cm yes .
 .It Cm KexAlgorithms
 Specifies the available KEX (Key Exchange) algorithms.
 Multiple algorithms must be comma-separated.
 Alternately if the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 The supported algorithms are:
 .Pp
 .Bl -item -compact -offset indent
 .It
 curve25519-sha256
 .It
 curve25519-sha256@libssh.org
 .It
 diffie-hellman-group1-sha1
 .It
 diffie-hellman-group14-sha1
 .It
 diffie-hellman-group14-sha256
 .It
 diffie-hellman-group16-sha512
 .It
 diffie-hellman-group18-sha512
 .It
 diffie-hellman-group-exchange-sha1
 .It
 diffie-hellman-group-exchange-sha256
 .It
 ecdh-sha2-nistp256
 .It
 ecdh-sha2-nistp384
 .It
 ecdh-sha2-nistp521
 .It
 sntrup761x25519-sha512@openssh.com
 .El
 .Pp
 The default is:
 .Bd -literal -offset indent
 sntrup761x25519-sha512@openssh.com,
 curve25519-sha256,curve25519-sha256@libssh.org,
 ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,
 diffie-hellman-group-exchange-sha256,
 diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,
 diffie-hellman-group14-sha256
 .Ed
 .Pp
 The list of available key exchange algorithms may also be obtained using
 .Qq ssh -Q KexAlgorithms .
 .It Cm ListenAddress
 Specifies the local addresses
 .Xr sshd 8
 should listen on.
 The following forms may be used:
 .Pp
 .Bl -item -offset indent -compact
 .It
 .Cm ListenAddress
 .Sm off
 .Ar hostname | address
 .Sm on
 .Op Cm rdomain Ar domain
 .It
 .Cm ListenAddress
 .Sm off
 .Ar hostname : port
 .Sm on
 .Op Cm rdomain Ar domain
 .It
 .Cm ListenAddress
 .Sm off
 .Ar IPv4_address : port
 .Sm on
 .Op Cm rdomain Ar domain
 .It
 .Cm ListenAddress
 .Sm off
 .Oo Ar hostname | address Oc : Ar port
 .Sm on
 .Op Cm rdomain Ar domain
 .El
 .Pp
 The optional
 .Cm rdomain
 qualifier requests
 .Xr sshd 8
 listen in an explicit routing domain.
 If
 .Ar port
 is not specified,
 sshd will listen on the address and all
 .Cm Port
 options specified.
 The default is to listen on all local addresses on the current default
 routing domain.
 Multiple
 .Cm ListenAddress
 options are permitted.
 For more information on routing domains, see
 .Xr rdomain 4 .
 .It Cm LoginGraceTime
 The server disconnects after this time if the user has not
 successfully logged in.
 If the value is 0, there is no time limit.
 The default is 120 seconds.
 .It Cm LogLevel
 Gives the verbosity level that is used when logging messages from
 .Xr sshd 8 .
 The possible values are:
 QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.
 The default is INFO.
 DEBUG and DEBUG1 are equivalent.
 DEBUG2 and DEBUG3 each specify higher levels of debugging output.
 Logging with a DEBUG level violates the privacy of users and is not recommended.
 .It Cm LogVerbose
-Specify one or more overrides to LogLevel.
+Specify one or more overrides to
+.Cm LogLevel .
 An override consists of a pattern lists that matches the source file, function
 and line number to force detailed logging for.
 For example, an override pattern of:
 .Bd -literal -offset indent
 kex.c:*:1000,*:kex_exchange_identification():*,packet.c:*
 .Ed
 .Pp
 would enable detailed logging for line 1000 of
 .Pa kex.c ,
 everything in the
 .Fn kex_exchange_identification
 function, and all code in the
 .Pa packet.c
 file.
 This option is intended for debugging and no overrides are enabled by default.
 .It Cm MACs
 Specifies the available MAC (message authentication code) algorithms.
 The MAC algorithm is used for data integrity protection.
 Multiple algorithms must be comma-separated.
 If the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 .Pp
 The algorithms that contain
 .Qq -etm
 calculate the MAC after encryption (encrypt-then-mac).
 These are considered safer and their use recommended.
 The supported MACs are:
 .Pp
 .Bl -item -compact -offset indent
 .It
 hmac-md5
 .It
 hmac-md5-96
 .It
 hmac-sha1
 .It
 hmac-sha1-96
 .It
 hmac-sha2-256
 .It
 hmac-sha2-512
 .It
 umac-64@openssh.com
 .It
 umac-128@openssh.com
 .It
 hmac-md5-etm@openssh.com
 .It
 hmac-md5-96-etm@openssh.com
 .It
 hmac-sha1-etm@openssh.com
 .It
 hmac-sha1-96-etm@openssh.com
 .It
 hmac-sha2-256-etm@openssh.com
 .It
 hmac-sha2-512-etm@openssh.com
 .It
 umac-64-etm@openssh.com
 .It
 umac-128-etm@openssh.com
 .El
 .Pp
 The default is:
 .Bd -literal -offset indent
 umac-64-etm@openssh.com,umac-128-etm@openssh.com,
 hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,
 hmac-sha1-etm@openssh.com,
 umac-64@openssh.com,umac-128@openssh.com,
 hmac-sha2-256,hmac-sha2-512,hmac-sha1
 .Ed
 .Pp
 The list of available MAC algorithms may also be obtained using
 .Qq ssh -Q mac .
 .It Cm Match
 Introduces a conditional block.
 If all of the criteria on the
 .Cm Match
 line are satisfied, the keywords on the following lines override those
 set in the global section of the config file, until either another
 .Cm Match
 line or the end of the file.
 If a keyword appears in multiple
 .Cm Match
 blocks that are satisfied, only the first instance of the keyword is
 applied.
 .Pp
 The arguments to
 .Cm Match
 are one or more criteria-pattern pairs or the single token
 .Cm All
 which matches all criteria.
 The available criteria are
 .Cm User ,
 .Cm Group ,
 .Cm Host ,
 .Cm LocalAddress ,
 .Cm LocalPort ,
 .Cm RDomain ,
 and
 .Cm Address
 (with
 .Cm RDomain
 representing the
 .Xr rdomain 4
 on which the connection was received).
 .Pp
 The match patterns may consist of single entries or comma-separated
 lists and may use the wildcard and negation operators described in the
 .Sx PATTERNS
 section of
 .Xr ssh_config 5 .
 .Pp
 The patterns in an
 .Cm Address
 criteria may additionally contain addresses to match in CIDR
 address/masklen format,
 such as 192.0.2.0/24 or 2001:db8::/32.
 Note that the mask length provided must be consistent with the address -
 it is an error to specify a mask length that is too long for the address
 or one with bits set in this host portion of the address.
 For example, 192.0.2.0/33 and 192.0.2.0/8, respectively.
 .Pp
 Only a subset of keywords may be used on the lines following a
 .Cm Match
 keyword.
 Available keywords are
 .Cm AcceptEnv ,
 .Cm AllowAgentForwarding ,
 .Cm AllowGroups ,
 .Cm AllowStreamLocalForwarding ,
 .Cm AllowTcpForwarding ,
 .Cm AllowUsers ,
 .Cm AuthenticationMethods ,
 .Cm AuthorizedKeysCommand ,
 .Cm AuthorizedKeysCommandUser ,
 .Cm AuthorizedKeysFile ,
 .Cm AuthorizedPrincipalsCommand ,
 .Cm AuthorizedPrincipalsCommandUser ,
 .Cm AuthorizedPrincipalsFile ,
 .Cm Banner ,
 .Cm CASignatureAlgorithms ,
 .Cm ChannelTimeout ,
 .Cm ChrootDirectory ,
 .Cm ClientAliveCountMax ,
 .Cm ClientAliveInterval ,
 .Cm DenyGroups ,
 .Cm DenyUsers ,
 .Cm DisableForwarding ,
 .Cm ExposeAuthInfo ,
 .Cm ForceCommand ,
 .Cm GatewayPorts ,
 .Cm GSSAPIAuthentication ,
 .Cm HostbasedAcceptedAlgorithms ,
 .Cm HostbasedAuthentication ,
 .Cm HostbasedUsesNameFromPacketOnly ,
 .Cm IgnoreRhosts ,
 .Cm Include ,
 .Cm IPQoS ,
 .Cm KbdInteractiveAuthentication ,
 .Cm KerberosAuthentication ,
 .Cm LogLevel ,
 .Cm MaxAuthTries ,
 .Cm MaxSessions ,
 .Cm PasswordAuthentication ,
 .Cm PermitEmptyPasswords ,
 .Cm PermitListen ,
 .Cm PermitOpen ,
 .Cm PermitRootLogin ,
 .Cm PermitTTY ,
 .Cm PermitTunnel ,
 .Cm PermitUserRC ,
 .Cm PubkeyAcceptedAlgorithms ,
 .Cm PubkeyAuthentication ,
 .Cm PubkeyAuthOptions ,
 .Cm RekeyLimit ,
 .Cm RevokedKeys ,
 .Cm RDomain ,
 .Cm SetEnv ,
 .Cm StreamLocalBindMask ,
 .Cm StreamLocalBindUnlink ,
 .Cm TrustedUserCAKeys ,
 .Cm UnusedConnectionTimeout ,
 .Cm X11DisplayOffset ,
 .Cm X11Forwarding
 and
 .Cm X11UseLocalhost .
 .It Cm MaxAuthTries
 Specifies the maximum number of authentication attempts permitted per
 connection.
 Once the number of failures reaches half this value,
 additional failures are logged.
 The default is 6.
 .It Cm MaxSessions
 Specifies the maximum number of open shell, login or subsystem (e.g. sftp)
 sessions permitted per network connection.
 Multiple sessions may be established by clients that support connection
 multiplexing.
 Setting
 .Cm MaxSessions
 to 1 will effectively disable session multiplexing, whereas setting it to 0
 will prevent all shell, login and subsystem sessions while still permitting
 forwarding.
 The default is 10.
 .It Cm MaxStartups
 Specifies the maximum number of concurrent unauthenticated connections to the
 SSH daemon.
 Additional connections will be dropped until authentication succeeds or the
 .Cm LoginGraceTime
 expires for a connection.
 The default is 10:30:100.
 .Pp
 Alternatively, random early drop can be enabled by specifying
 the three colon separated values
 start:rate:full (e.g. "10:30:60").
 .Xr sshd 8
 will refuse connection attempts with a probability of rate/100 (30%)
 if there are currently start (10) unauthenticated connections.
 The probability increases linearly and all connection attempts
 are refused if the number of unauthenticated connections reaches full (60).
 .It Cm ModuliFile
 Specifies the
 .Xr moduli 5
 file that contains the Diffie-Hellman groups used for the
 .Dq diffie-hellman-group-exchange-sha1
 and
 .Dq diffie-hellman-group-exchange-sha256
 key exchange methods.
 The default is
 .Pa /etc/moduli .
 .It Cm PasswordAuthentication
 Specifies whether password authentication is allowed.
 The default is
 .Cm yes .
 .It Cm PermitEmptyPasswords
 When password authentication is allowed, it specifies whether the
 server allows login to accounts with empty password strings.
 The default is
 .Cm no .
 .It Cm PermitListen
 Specifies the addresses/ports on which a remote TCP port forwarding may listen.
 The listen specification must be one of the following forms:
 .Pp
 .Bl -item -offset indent -compact
 .It
 .Cm PermitListen
 .Sm off
 .Ar port
 .Sm on
 .It
 .Cm PermitListen
 .Sm off
 .Ar host : port
 .Sm on
 .El
 .Pp
 Multiple permissions may be specified by separating them with whitespace.
 An argument of
 .Cm any
 can be used to remove all restrictions and permit any listen requests.
 An argument of
 .Cm none
 can be used to prohibit all listen requests.
 The host name may contain wildcards as described in the PATTERNS section in
 .Xr ssh_config 5 .
 The wildcard
 .Sq *
 can also be used in place of a port number to allow all ports.
 By default all port forwarding listen requests are permitted.
 Note that the
 .Cm GatewayPorts
 option may further restrict which addresses may be listened on.
 Note also that
 .Xr ssh 1
 will request a listen host of
 .Dq localhost
 if no listen host was specifically requested, and this name is
 treated differently to explicit localhost addresses of
 .Dq 127.0.0.1
 and
 .Dq ::1 .
 .It Cm PermitOpen
 Specifies the destinations to which TCP port forwarding is permitted.
 The forwarding specification must be one of the following forms:
 .Pp
 .Bl -item -offset indent -compact
 .It
 .Cm PermitOpen
 .Sm off
 .Ar host : port
 .Sm on
 .It
 .Cm PermitOpen
 .Sm off
 .Ar IPv4_addr : port
 .Sm on
 .It
 .Cm PermitOpen
 .Sm off
 .Ar \&[ IPv6_addr \&] : port
 .Sm on
 .El
 .Pp
 Multiple forwards may be specified by separating them with whitespace.
 An argument of
 .Cm any
 can be used to remove all restrictions and permit any forwarding requests.
 An argument of
 .Cm none
 can be used to prohibit all forwarding requests.
 The wildcard
 .Sq *
 can be used for host or port to allow all hosts or ports respectively.
 Otherwise, no pattern matching or address lookups are performed on supplied
 names.
 By default all port forwarding requests are permitted.
 .It Cm PermitRootLogin
 Specifies whether root can log in using
 .Xr ssh 1 .
 The argument must be
 .Cm yes ,
 .Cm prohibit-password ,
 .Cm forced-commands-only ,
 or
 .Cm no .
 The default is
 .Cm prohibit-password .
 .Pp
 If this option is set to
 .Cm prohibit-password
 (or its deprecated alias,
 .Cm without-password ) ,
 password and keyboard-interactive authentication are disabled for root.
 .Pp
 If this option is set to
 .Cm forced-commands-only ,
 root login with public key authentication will be allowed,
 but only if the
 .Ar command
 option has been specified
 (which may be useful for taking remote backups even if root login is
 normally not allowed).
 All other authentication methods are disabled for root.
 .Pp
 If this option is set to
 .Cm no ,
 root is not allowed to log in.
 .It Cm PermitTTY
 Specifies whether
 .Xr pty 4
 allocation is permitted.
 The default is
 .Cm yes .
 .It Cm PermitTunnel
 Specifies whether
 .Xr tun 4
 device forwarding is allowed.
 The argument must be
 .Cm yes ,
 .Cm point-to-point
 (layer 3),
 .Cm ethernet
 (layer 2), or
 .Cm no .
 Specifying
 .Cm yes
 permits both
 .Cm point-to-point
 and
 .Cm ethernet .
 The default is
 .Cm no .
 .Pp
 Independent of this setting, the permissions of the selected
 .Xr tun 4
 device must allow access to the user.
 .It Cm PermitUserEnvironment
 Specifies whether
 .Pa ~/.ssh/environment
 and
 .Cm environment=
 options in
 .Pa ~/.ssh/authorized_keys
 are processed by
 .Xr sshd 8 .
 Valid options are
 .Cm yes ,
 .Cm no
 or a pattern-list specifying which environment variable names to accept
 (for example
 .Qq LANG,LC_* ) .
 The default is
 .Cm no .
 Enabling environment processing may enable users to bypass access
 restrictions in some configurations using mechanisms such as
 .Ev LD_PRELOAD .
 .It Cm PermitUserRC
 Specifies whether any
 .Pa ~/.ssh/rc
 file is executed.
 The default is
 .Cm yes .
 .It Cm PerSourceMaxStartups
 Specifies the number of unauthenticated connections allowed from a
 given source address, or
 .Dq none
 if there is no limit.
 This limit is applied in addition to
 .Cm MaxStartups ,
 whichever is lower.
 The default is
 .Cm none .
 .It Cm PerSourceNetBlockSize
 Specifies the number of bits of source address that are grouped together
 for the purposes of applying PerSourceMaxStartups limits.
 Values for IPv4 and optionally IPv6 may be specified, separated by a colon.
 The default is
 .Cm 32:128 ,
 which means each address is considered individually.
 .It Cm PidFile
 Specifies the file that contains the process ID of the
 SSH daemon, or
 .Cm none
 to not write one.
 The default is
 .Pa /var/run/sshd.pid .
 .It Cm Port
 Specifies the port number that
 .Xr sshd 8
 listens on.
 The default is 22.
 Multiple options of this type are permitted.
 See also
 .Cm ListenAddress .
 .It Cm PrintLastLog
 Specifies whether
 .Xr sshd 8
 should print the date and time of the last user login when a user logs
 in interactively.
 The default is
 .Cm yes .
 .It Cm PrintMotd
 Specifies whether
 .Xr sshd 8
 should print
 .Pa /etc/motd
 when a user logs in interactively.
 (On some systems it is also printed by the shell,
 .Pa /etc/profile ,
 or equivalent.)
 The default is
 .Cm yes .
 .It Cm PubkeyAcceptedAlgorithms
 Specifies the signature algorithms that will be accepted for public key
 authentication as a list of comma-separated patterns.
 Alternately if the specified list begins with a
 .Sq +
 character, then the specified algorithms will be appended to the default set
 instead of replacing them.
 If the specified list begins with a
 .Sq -
 character, then the specified algorithms (including wildcards) will be removed
 from the default set instead of replacing them.
 If the specified list begins with a
 .Sq ^
 character, then the specified algorithms will be placed at the head of the
 default set.
 The default for this option is:
 .Bd -literal -offset 3n
 ssh-ed25519-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 sk-ssh-ed25519-cert-v01@openssh.com,
 sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 rsa-sha2-512-cert-v01@openssh.com,
 rsa-sha2-256-cert-v01@openssh.com,
 ssh-ed25519,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 sk-ssh-ed25519@openssh.com,
 sk-ecdsa-sha2-nistp256@openssh.com,
 rsa-sha2-512,rsa-sha2-256
 .Ed
 .Pp
 The list of available signature algorithms may also be obtained using
 .Qq ssh -Q PubkeyAcceptedAlgorithms .
 .It Cm PubkeyAuthOptions
 Sets one or more public key authentication options.
 The supported keywords are:
 .Cm none
 (the default; indicating no additional options are enabled),
 .Cm touch-required
 and
 .Cm verify-required .
 .Pp
 The
 .Cm touch-required
 option causes public key authentication using a FIDO authenticator algorithm
 (i.e.\&
 .Cm ecdsa-sk
 or
 .Cm ed25519-sk )
 to always require the signature to attest that a physically present user
 explicitly confirmed the authentication (usually by touching the authenticator).
 By default,
 .Xr sshd 8
 requires user presence unless overridden with an authorized_keys option.
 The
 .Cm touch-required
 flag disables this override.
 .Pp
 The
 .Cm verify-required
 option requires a FIDO key signature attest that the user was verified,
 e.g. via a PIN.
 .Pp
 Neither the
 .Cm touch-required
 or
 .Cm verify-required
 options have any effect for other, non-FIDO, public key types.
 .It Cm PubkeyAuthentication
 Specifies whether public key authentication is allowed.
 The default is
 .Cm yes .
 .It Cm RekeyLimit
 Specifies the maximum amount of data that may be transmitted or received
 before the session key is renegotiated, optionally followed by a maximum
 amount of time that may pass before the session key is renegotiated.
 The first argument is specified in bytes and may have a suffix of
 .Sq K ,
 .Sq M ,
 or
 .Sq G
 to indicate Kilobytes, Megabytes, or Gigabytes, respectively.
 The default is between
 .Sq 1G
 and
 .Sq 4G ,
 depending on the cipher.
 The optional second value is specified in seconds and may use any of the
 units documented in the
 .Sx TIME FORMATS
 section.
 The default value for
 .Cm RekeyLimit
 is
 .Cm default none ,
 which means that rekeying is performed after the cipher's default amount
 of data has been sent or received and no time based rekeying is done.
 .It Cm RequiredRSASize
 Specifies the minimum RSA key size (in bits) that
 .Xr sshd 8
 will accept.
 User and host-based authentication keys smaller than this limit will be
 refused.
 The default is
 .Cm 1024
 bits.
 Note that this limit may only be raised from the default.
 .It Cm RevokedKeys
 Specifies revoked public keys file, or
 .Cm none
 to not use one.
 Keys listed in this file will be refused for public key authentication.
 Note that if this file is not readable, then public key authentication will
 be refused for all users.
 Keys may be specified as a text file, listing one public key per line, or as
 an OpenSSH Key Revocation List (KRL) as generated by
 .Xr ssh-keygen 1 .
 For more information on KRLs, see the KEY REVOCATION LISTS section in
 .Xr ssh-keygen 1 .
 .It Cm RDomain
 Specifies an explicit routing domain that is applied after authentication
 has completed.
 The user session, as well as any forwarded or listening IP sockets,
 will be bound to this
 .Xr rdomain 4 .
 If the routing domain is set to
 .Cm \&%D ,
 then the domain in which the incoming connection was received will be applied.
 .It Cm SecurityKeyProvider
 Specifies a path to a library that will be used when loading
 FIDO authenticator-hosted keys, overriding the default of using
 the built-in USB HID support.
 .It Cm SetEnv
 Specifies one or more environment variables to set in child sessions started
 by
 .Xr sshd 8
 as
 .Dq NAME=VALUE .
 The environment value may be quoted (e.g. if it contains whitespace
 characters).
 Environment variables set by
 .Cm SetEnv
 override the default environment and any variables specified by the user
 via
 .Cm AcceptEnv
 or
 .Cm PermitUserEnvironment .
 .It Cm StreamLocalBindMask
 Sets the octal file creation mode mask
 .Pq umask
 used when creating a Unix-domain socket file for local or remote
 port forwarding.
 This option is only used for port forwarding to a Unix-domain socket file.
 .Pp
 The default value is 0177, which creates a Unix-domain socket file that is
 readable and writable only by the owner.
 Note that not all operating systems honor the file mode on Unix-domain
 socket files.
 .It Cm StreamLocalBindUnlink
 Specifies whether to remove an existing Unix-domain socket file for local
 or remote port forwarding before creating a new one.
 If the socket file already exists and
 .Cm StreamLocalBindUnlink
 is not enabled,
 .Nm sshd
 will be unable to forward the port to the Unix-domain socket file.
 This option is only used for port forwarding to a Unix-domain socket file.
 .Pp
 The argument must be
 .Cm yes
 or
 .Cm no .
 The default is
 .Cm no .
 .It Cm StrictModes
 Specifies whether
 .Xr sshd 8
 should check file modes and ownership of the
 user's files and home directory before accepting login.
 This is normally desirable because novices sometimes accidentally leave their
 directory or files world-writable.
 The default is
 .Cm yes .
 Note that this does not apply to
 .Cm ChrootDirectory ,
 whose permissions and ownership are checked unconditionally.
 .It Cm Subsystem
 Configures an external subsystem (e.g. file transfer daemon).
 Arguments should be a subsystem name and a command (with optional arguments)
 to execute upon subsystem request.
 .Pp
 The command
 .Cm sftp-server
 implements the SFTP file transfer subsystem.
 .Pp
 Alternately the name
 .Cm internal-sftp
 implements an in-process SFTP server.
 This may simplify configurations using
 .Cm ChrootDirectory
 to force a different filesystem root on clients.
+It accepts the same command line arguments as
+.Cm sftp-server
+and even though it is in-process, settings such as
+.Cm LogLevel
+or
+.Cm SyslogFacility
+do not apply to it and must be set explicitly via
+command line arguments.
 .Pp
 By default no subsystems are defined.
 .It Cm SyslogFacility
 Gives the facility code that is used when logging messages from
 .Xr sshd 8 .
 The possible values are: DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2,
 LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
 The default is AUTH.
 .It Cm TCPKeepAlive
 Specifies whether the system should send TCP keepalive messages to the
 other side.
 If they are sent, death of the connection or crash of one
 of the machines will be properly noticed.
 However, this means that
 connections will die if the route is down temporarily, and some people
 find it annoying.
 On the other hand, if TCP keepalives are not sent,
 sessions may hang indefinitely on the server, leaving
 .Qq ghost
 users and consuming server resources.
 .Pp
 The default is
 .Cm yes
 (to send TCP keepalive messages), and the server will notice
 if the network goes down or the client host crashes.
 This avoids infinitely hanging sessions.
 .Pp
 To disable TCP keepalive messages, the value should be set to
 .Cm no .
 .It Cm TrustedUserCAKeys
 Specifies a file containing public keys of certificate authorities that are
 trusted to sign user certificates for authentication, or
 .Cm none
 to not use one.
 Keys are listed one per line; empty lines and comments starting with
 .Ql #
 are allowed.
 If a certificate is presented for authentication and has its signing CA key
 listed in this file, then it may be used for authentication for any user
 listed in the certificate's principals list.
 Note that certificates that lack a list of principals will not be permitted
 for authentication using
 .Cm TrustedUserCAKeys .
 For more details on certificates, see the CERTIFICATES section in
 .Xr ssh-keygen 1 .
 .It Cm UnusedConnectionTimeout
 Specifies whether and how quickly
 .Xr sshd 8
 should close client connections with no open channels.
 Open channels include active shell, command execution or subsystem
 sessions, connected network, socket, agent or X11 forwardings.
 Forwarding listeners, such as those from the
 .Xr ssh 1
 .Fl R
 flag, are not considered as open channels and do not prevent the timeout.
 The timeout value
 is specified in seconds or may use any of the units documented in the
 .Sx TIME FORMATS
 section.
 .Pp
 Note that this timeout starts when the client connection completes
 user authentication but before the client has an opportunity to open any
 channels.
 Caution should be used when using short timeout values, as they may not
 provide sufficient time for the client to request and open its channels
 before terminating the connection.
 .Pp
 The default
 .Cm none
 is to never expire connections for having no open channels.
 This option may be useful in conjunction with
 .Cm ChannelTimeout .
 .It Cm UseDNS
 Specifies whether
 .Xr sshd 8
 should look up the remote host name, and to check that
 the resolved host name for the remote IP address maps back to the
 very same IP address.
 .Pp
 If this option is set to
 .Cm no
 (the default) then only addresses and not host names may be used in
 .Pa ~/.ssh/authorized_keys
 .Cm from
 and
 .Nm
 .Cm Match
 .Cm Host
 directives.
 .It Cm UsePAM
 Enables the Pluggable Authentication Module interface.
 If set to
 .Cm yes
 this will enable PAM authentication using
 .Cm KbdInteractiveAuthentication
 and
 .Cm PasswordAuthentication
 in addition to PAM account and session module processing for all
 authentication types.
 .Pp
 Because PAM keyboard-interactive authentication usually serves an equivalent
 role to password authentication, you should disable either
 .Cm PasswordAuthentication
 or
 .Cm KbdInteractiveAuthentication .
 .Pp
 If
 .Cm UsePAM
 is enabled, you will not be able to run
 .Xr sshd 8
 as a non-root user.
 The default is
 .Cm no .
 .It Cm VersionAddendum
 Optionally specifies additional text to append to the SSH protocol banner
 sent by the server upon connection.
 The default is
 .Cm none .
 .It Cm X11DisplayOffset
 Specifies the first display number available for
 .Xr sshd 8 Ns 's
 X11 forwarding.
 This prevents sshd from interfering with real X11 servers.
 The default is 10.
 .It Cm X11Forwarding
 Specifies whether X11 forwarding is permitted.
 The argument must be
 .Cm yes
 or
 .Cm no .
 The default is
 .Cm no .
 .Pp
 When X11 forwarding is enabled, there may be additional exposure to
 the server and to client displays if the
 .Xr sshd 8
 proxy display is configured to listen on the wildcard address (see
 .Cm X11UseLocalhost ) ,
 though this is not the default.
 Additionally, the authentication spoofing and authentication data
 verification and substitution occur on the client side.
 The security risk of using X11 forwarding is that the client's X11
 display server may be exposed to attack when the SSH client requests
 forwarding (see the warnings for
 .Cm ForwardX11
 in
 .Xr ssh_config 5 ) .
 A system administrator may have a stance in which they want to
 protect clients that may expose themselves to attack by unwittingly
 requesting X11 forwarding, which can warrant a
 .Cm no
 setting.
 .Pp
 Note that disabling X11 forwarding does not prevent users from
 forwarding X11 traffic, as users can always install their own forwarders.
 .It Cm X11UseLocalhost
 Specifies whether
 .Xr sshd 8
 should bind the X11 forwarding server to the loopback address or to
 the wildcard address.
 By default,
 sshd binds the forwarding server to the loopback address and sets the
 hostname part of the
 .Ev DISPLAY
 environment variable to
 .Cm localhost .
 This prevents remote hosts from connecting to the proxy display.
 However, some older X11 clients may not function with this
 configuration.
 .Cm X11UseLocalhost
 may be set to
 .Cm no
 to specify that the forwarding server should be bound to the wildcard
 address.
 The argument must be
 .Cm yes
 or
 .Cm no .
 The default is
 .Cm yes .
 .It Cm XAuthLocation
 Specifies the full pathname of the
 .Xr xauth 1
 program, or
 .Cm none
 to not use one.
 The default is
 .Pa /usr/X11R6/bin/xauth .
 .El
 .Sh TIME FORMATS
 .Xr sshd 8
 command-line arguments and configuration file options that specify time
 may be expressed using a sequence of the form:
 .Sm off
 .Ar time Op Ar qualifier ,
 .Sm on
 where
 .Ar time
 is a positive integer value and
 .Ar qualifier
 is one of the following:
 .Pp
 .Bl -tag -width Ds -compact -offset indent
 .It Aq Cm none
 seconds
 .It Cm s | Cm S
 seconds
 .It Cm m | Cm M
 minutes
 .It Cm h | Cm H
 hours
 .It Cm d | Cm D
 days
 .It Cm w | Cm W
 weeks
 .El
 .Pp
 Each member of the sequence is added together to calculate
 the total time value.
 .Pp
 Time format examples:
 .Pp
 .Bl -tag -width Ds -compact -offset indent
 .It 600
 600 seconds (10 minutes)
 .It 10m
 10 minutes
 .It 1h30m
 1 hour 30 minutes (90 minutes)
 .El
 .Sh TOKENS
 Arguments to some keywords can make use of tokens,
 which are expanded at runtime:
 .Pp
 .Bl -tag -width XXXX -offset indent -compact
 .It %%
 A literal
 .Sq % .
 .It \&%C
 Identifies the connection endpoints, containing
 four space-separated values: client address, client port number,
 server address, and server port number.
 .It \&%D
 The routing domain in which the incoming connection was received.
 .It %F
 The fingerprint of the CA key.
 .It %f
 The fingerprint of the key or certificate.
 .It %h
 The home directory of the user.
 .It %i
 The key ID in the certificate.
 .It %K
 The base64-encoded CA key.
 .It %k
 The base64-encoded key or certificate for authentication.
 .It %s
 The serial number of the certificate.
 .It \&%T
 The type of the CA key.
 .It %t
 The key or certificate type.
 .It \&%U
 The numeric user ID of the target user.
 .It %u
 The username.
 .El
 .Pp
 .Cm AuthorizedKeysCommand
 accepts the tokens %%, %C, %D, %f, %h, %k, %t, %U, and %u.
 .Pp
 .Cm AuthorizedKeysFile
 accepts the tokens %%, %h, %U, and %u.
 .Pp
 .Cm AuthorizedPrincipalsCommand
 accepts the tokens %%, %C, %D, %F, %f, %h, %i, %K, %k, %s, %T, %t, %U, and %u.
 .Pp
 .Cm AuthorizedPrincipalsFile
 accepts the tokens %%, %h, %U, and %u.
 .Pp
 .Cm ChrootDirectory
 accepts the tokens %%, %h, %U, and %u.
 .Pp
 .Cm RoutingDomain
 accepts the token %D.
 .Sh FILES
 .Bl -tag -width Ds
 .It Pa /etc/ssh/sshd_config
 Contains configuration data for
 .Xr sshd 8 .
 This file should be writable by root only, but it is recommended
 (though not necessary) that it be world-readable.
 .El
 .Sh SEE ALSO
 .Xr sftp-server 8 ,
 .Xr sshd 8
 .Sh AUTHORS
 .An -nosplit
 OpenSSH is a derivative of the original and free
 ssh 1.2.12 release by
 .An Tatu Ylonen .
 .An Aaron Campbell , Bob Beck , Markus Friedl , Niels Provos ,
 .An Theo de Raadt
 and
 .An Dug Song
 removed many bugs, re-added newer features and
 created OpenSSH.
 .An Markus Friedl
 contributed the support for SSH protocol versions 1.5 and 2.0.
 .An Niels Provos
 and
 .An Markus Friedl
 contributed support for privilege separation.
diff --git a/sshkey.c b/sshkey.c
index 06db9b5da34b..d4356e72cd61 100644
--- a/sshkey.c
+++ b/sshkey.c
@@ -1,3706 +1,3714 @@
-/* $OpenBSD: sshkey.c,v 1.140 2023/10/16 08:40:00 dtucker Exp $ */
+/* $OpenBSD: sshkey.c,v 1.142 2024/01/11 01:45:36 djm Exp $ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  * Copyright (c) 2008 Alexander von Gernler.  All rights reserved.
  * Copyright (c) 2010,2011 Damien Miller.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "includes.h"
 
 #include <sys/types.h>
 #include <netinet/in.h>
 
 #ifdef WITH_OPENSSL
 #include <openssl/evp.h>
 #include <openssl/err.h>
 #include <openssl/pem.h>
 #endif
 
 #include "crypto_api.h"
 
 #include <errno.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <resolv.h>
 #include <time.h>
 #ifdef HAVE_UTIL_H
 #include <util.h>
 #endif /* HAVE_UTIL_H */
 
 #include "ssh2.h"
 #include "ssherr.h"
 #include "misc.h"
 #include "sshbuf.h"
 #include "cipher.h"
 #include "digest.h"
 #define SSHKEY_INTERNAL
 #include "sshkey.h"
 #include "match.h"
 #include "ssh-sk.h"
 
 #ifdef WITH_XMSS
 #include "sshkey-xmss.h"
 #include "xmss_fast.h"
 #endif
 
 #include "openbsd-compat/openssl-compat.h"
 
 /* openssh private key file format */
 #define MARK_BEGIN		"-----BEGIN OPENSSH PRIVATE KEY-----\n"
 #define MARK_END		"-----END OPENSSH PRIVATE KEY-----\n"
 #define MARK_BEGIN_LEN		(sizeof(MARK_BEGIN) - 1)
 #define MARK_END_LEN		(sizeof(MARK_END) - 1)
 #define KDFNAME			"bcrypt"
 #define AUTH_MAGIC		"openssh-key-v1"
 #define SALT_LEN		16
 #define DEFAULT_CIPHERNAME	"aes256-ctr"
 #define	DEFAULT_ROUNDS		24
 
 /* Version identification string for SSH v1 identity files. */
 #define LEGACY_BEGIN		"SSH PRIVATE KEY FILE FORMAT 1.1\n"
 
 /*
  * Constants relating to "shielding" support; protection of keys expected
  * to remain in memory for long durations
  */
 #define SSHKEY_SHIELD_PREKEY_LEN	(16 * 1024)
 #define SSHKEY_SHIELD_CIPHER		"aes256-ctr" /* XXX want AES-EME* */
 #define SSHKEY_SHIELD_PREKEY_HASH	SSH_DIGEST_SHA512
 
 int	sshkey_private_serialize_opt(struct sshkey *key,
     struct sshbuf *buf, enum sshkey_serialize_rep);
 static int sshkey_from_blob_internal(struct sshbuf *buf,
     struct sshkey **keyp, int allow_cert);
 
 /* Supported key types */
 extern const struct sshkey_impl sshkey_ed25519_impl;
 extern const struct sshkey_impl sshkey_ed25519_cert_impl;
 extern const struct sshkey_impl sshkey_ed25519_sk_impl;
 extern const struct sshkey_impl sshkey_ed25519_sk_cert_impl;
 #ifdef WITH_OPENSSL
 # ifdef OPENSSL_HAS_ECC
 #  ifdef ENABLE_SK
 extern const struct sshkey_impl sshkey_ecdsa_sk_impl;
 extern const struct sshkey_impl sshkey_ecdsa_sk_cert_impl;
 extern const struct sshkey_impl sshkey_ecdsa_sk_webauthn_impl;
 #  endif /* ENABLE_SK */
 extern const struct sshkey_impl sshkey_ecdsa_nistp256_impl;
 extern const struct sshkey_impl sshkey_ecdsa_nistp256_cert_impl;
 extern const struct sshkey_impl sshkey_ecdsa_nistp384_impl;
 extern const struct sshkey_impl sshkey_ecdsa_nistp384_cert_impl;
 #  ifdef OPENSSL_HAS_NISTP521
 extern const struct sshkey_impl sshkey_ecdsa_nistp521_impl;
 extern const struct sshkey_impl sshkey_ecdsa_nistp521_cert_impl;
 #  endif /* OPENSSL_HAS_NISTP521 */
 # endif /* OPENSSL_HAS_ECC */
 extern const struct sshkey_impl sshkey_rsa_impl;
 extern const struct sshkey_impl sshkey_rsa_cert_impl;
 extern const struct sshkey_impl sshkey_rsa_sha256_impl;
 extern const struct sshkey_impl sshkey_rsa_sha256_cert_impl;
 extern const struct sshkey_impl sshkey_rsa_sha512_impl;
 extern const struct sshkey_impl sshkey_rsa_sha512_cert_impl;
+# ifdef WITH_DSA
 extern const struct sshkey_impl sshkey_dss_impl;
 extern const struct sshkey_impl sshkey_dsa_cert_impl;
+# endif
 #endif /* WITH_OPENSSL */
 #ifdef WITH_XMSS
 extern const struct sshkey_impl sshkey_xmss_impl;
 extern const struct sshkey_impl sshkey_xmss_cert_impl;
 #endif
 
 const struct sshkey_impl * const keyimpls[] = {
 	&sshkey_ed25519_impl,
 	&sshkey_ed25519_cert_impl,
 #ifdef ENABLE_SK
 	&sshkey_ed25519_sk_impl,
 	&sshkey_ed25519_sk_cert_impl,
 #endif
 #ifdef WITH_OPENSSL
 # ifdef OPENSSL_HAS_ECC
 	&sshkey_ecdsa_nistp256_impl,
 	&sshkey_ecdsa_nistp256_cert_impl,
 	&sshkey_ecdsa_nistp384_impl,
 	&sshkey_ecdsa_nistp384_cert_impl,
 #  ifdef OPENSSL_HAS_NISTP521
 	&sshkey_ecdsa_nistp521_impl,
 	&sshkey_ecdsa_nistp521_cert_impl,
 #  endif /* OPENSSL_HAS_NISTP521 */
 #  ifdef ENABLE_SK
 	&sshkey_ecdsa_sk_impl,
 	&sshkey_ecdsa_sk_cert_impl,
 	&sshkey_ecdsa_sk_webauthn_impl,
 #  endif /* ENABLE_SK */
 # endif /* OPENSSL_HAS_ECC */
+# ifdef WITH_DSA
 	&sshkey_dss_impl,
 	&sshkey_dsa_cert_impl,
+# endif
 	&sshkey_rsa_impl,
 	&sshkey_rsa_cert_impl,
 	&sshkey_rsa_sha256_impl,
 	&sshkey_rsa_sha256_cert_impl,
 	&sshkey_rsa_sha512_impl,
 	&sshkey_rsa_sha512_cert_impl,
 #endif /* WITH_OPENSSL */
 #ifdef WITH_XMSS
 	&sshkey_xmss_impl,
 	&sshkey_xmss_cert_impl,
 #endif
 	NULL
 };
 
 static const struct sshkey_impl *
 sshkey_impl_from_type(int type)
 {
 	int i;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		if (keyimpls[i]->type == type)
 			return keyimpls[i];
 	}
 	return NULL;
 }
 
 static const struct sshkey_impl *
 sshkey_impl_from_type_nid(int type, int nid)
 {
 	int i;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		if (keyimpls[i]->type == type &&
 		    (keyimpls[i]->nid == 0 || keyimpls[i]->nid == nid))
 			return keyimpls[i];
 	}
 	return NULL;
 }
 
 static const struct sshkey_impl *
 sshkey_impl_from_key(const struct sshkey *k)
 {
 	if (k == NULL)
 		return NULL;
 	return sshkey_impl_from_type_nid(k->type, k->ecdsa_nid);
 }
 
 const char *
 sshkey_type(const struct sshkey *k)
 {
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_key(k)) == NULL)
 		return "unknown";
 	return impl->shortname;
 }
 
 static const char *
 sshkey_ssh_name_from_type_nid(int type, int nid)
 {
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_type_nid(type, nid)) == NULL)
 		return "ssh-unknown";
 	return impl->name;
 }
 
 int
 sshkey_type_is_cert(int type)
 {
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_type(type)) == NULL)
 		return 0;
 	return impl->cert;
 }
 
 const char *
 sshkey_ssh_name(const struct sshkey *k)
 {
 	return sshkey_ssh_name_from_type_nid(k->type, k->ecdsa_nid);
 }
 
 const char *
 sshkey_ssh_name_plain(const struct sshkey *k)
 {
 	return sshkey_ssh_name_from_type_nid(sshkey_type_plain(k->type),
 	    k->ecdsa_nid);
 }
 
 int
 sshkey_type_from_name(const char *name)
 {
 	int i;
 	const struct sshkey_impl *impl;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		impl = keyimpls[i];
 		/* Only allow shortname matches for plain key types */
 		if ((impl->name != NULL && strcmp(name, impl->name) == 0) ||
 		    (!impl->cert && strcasecmp(impl->shortname, name) == 0))
 			return impl->type;
 	}
 	return KEY_UNSPEC;
 }
 
 static int
 key_type_is_ecdsa_variant(int type)
 {
 	switch (type) {
 	case KEY_ECDSA:
 	case KEY_ECDSA_CERT:
 	case KEY_ECDSA_SK:
 	case KEY_ECDSA_SK_CERT:
 		return 1;
 	}
 	return 0;
 }
 
 int
 sshkey_ecdsa_nid_from_name(const char *name)
 {
 	int i;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		if (!key_type_is_ecdsa_variant(keyimpls[i]->type))
 			continue;
 		if (keyimpls[i]->name != NULL &&
 		    strcmp(name, keyimpls[i]->name) == 0)
 			return keyimpls[i]->nid;
 	}
 	return -1;
 }
 
 int
 sshkey_match_keyname_to_sigalgs(const char *keyname, const char *sigalgs)
 {
 	int ktype;
 
 	if (sigalgs == NULL || *sigalgs == '\0' ||
 	    (ktype = sshkey_type_from_name(keyname)) == KEY_UNSPEC)
 		return 0;
 	else if (ktype == KEY_RSA) {
 		return match_pattern_list("ssh-rsa", sigalgs, 0) == 1 ||
 		    match_pattern_list("rsa-sha2-256", sigalgs, 0) == 1 ||
 		    match_pattern_list("rsa-sha2-512", sigalgs, 0) == 1;
 	} else if (ktype == KEY_RSA_CERT) {
 		return match_pattern_list("ssh-rsa-cert-v01@openssh.com",
 		    sigalgs, 0) == 1 ||
 		    match_pattern_list("rsa-sha2-256-cert-v01@openssh.com",
 		    sigalgs, 0) == 1 ||
 		    match_pattern_list("rsa-sha2-512-cert-v01@openssh.com",
 		    sigalgs, 0) == 1;
 	} else
 		return match_pattern_list(keyname, sigalgs, 0) == 1;
 }
 
 char *
 sshkey_alg_list(int certs_only, int plain_only, int include_sigonly, char sep)
 {
 	char *tmp, *ret = NULL;
 	size_t i, nlen, rlen = 0;
 	const struct sshkey_impl *impl;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		impl = keyimpls[i];
 		if (impl->name == NULL)
 			continue;
 		if (!include_sigonly && impl->sigonly)
 			continue;
 		if ((certs_only && !impl->cert) || (plain_only && impl->cert))
 			continue;
 		if (ret != NULL)
 			ret[rlen++] = sep;
 		nlen = strlen(impl->name);
 		if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) {
 			free(ret);
 			return NULL;
 		}
 		ret = tmp;
 		memcpy(ret + rlen, impl->name, nlen + 1);
 		rlen += nlen;
 	}
 	return ret;
 }
 
 int
 sshkey_names_valid2(const char *names, int allow_wildcard, int plain_only)
 {
 	char *s, *cp, *p;
 	const struct sshkey_impl *impl;
 	int i, type;
 
 	if (names == NULL || strcmp(names, "") == 0)
 		return 0;
 	if ((s = cp = strdup(names)) == NULL)
 		return 0;
 	for ((p = strsep(&cp, ",")); p && *p != '\0';
 	    (p = strsep(&cp, ","))) {
 		type = sshkey_type_from_name(p);
 		if (type == KEY_UNSPEC) {
 			if (allow_wildcard) {
 				/*
 				 * Try matching key types against the string.
 				 * If any has a positive or negative match then
 				 * the component is accepted.
 				 */
 				impl = NULL;
 				for (i = 0; keyimpls[i] != NULL; i++) {
 					if (match_pattern_list(
 					    keyimpls[i]->name, p, 0) != 0) {
 						impl = keyimpls[i];
 						break;
 					}
 				}
 				if (impl != NULL)
 					continue;
 			}
 			free(s);
 			return 0;
 		} else if (plain_only && sshkey_type_is_cert(type)) {
 			free(s);
 			return 0;
 		}
 	}
 	free(s);
 	return 1;
 }
 
 u_int
 sshkey_size(const struct sshkey *k)
 {
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_key(k)) == NULL)
 		return 0;
 	if (impl->funcs->size != NULL)
 		return impl->funcs->size(k);
 	return impl->keybits;
 }
 
 static int
 sshkey_type_is_valid_ca(int type)
 {
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_type(type)) == NULL)
 		return 0;
 	/* All non-certificate types may act as CAs */
 	return !impl->cert;
 }
 
 int
 sshkey_is_cert(const struct sshkey *k)
 {
 	if (k == NULL)
 		return 0;
 	return sshkey_type_is_cert(k->type);
 }
 
 int
 sshkey_is_sk(const struct sshkey *k)
 {
 	if (k == NULL)
 		return 0;
 	switch (sshkey_type_plain(k->type)) {
 	case KEY_ECDSA_SK:
 	case KEY_ED25519_SK:
 		return 1;
 	default:
 		return 0;
 	}
 }
 
 /* Return the cert-less equivalent to a certified key type */
 int
 sshkey_type_plain(int type)
 {
 	switch (type) {
 	case KEY_RSA_CERT:
 		return KEY_RSA;
 	case KEY_DSA_CERT:
 		return KEY_DSA;
 	case KEY_ECDSA_CERT:
 		return KEY_ECDSA;
 	case KEY_ECDSA_SK_CERT:
 		return KEY_ECDSA_SK;
 	case KEY_ED25519_CERT:
 		return KEY_ED25519;
 	case KEY_ED25519_SK_CERT:
 		return KEY_ED25519_SK;
 	case KEY_XMSS_CERT:
 		return KEY_XMSS;
 	default:
 		return type;
 	}
 }
 
 /* Return the cert equivalent to a plain key type */
 static int
 sshkey_type_certified(int type)
 {
 	switch (type) {
 	case KEY_RSA:
 		return KEY_RSA_CERT;
 	case KEY_DSA:
 		return KEY_DSA_CERT;
 	case KEY_ECDSA:
 		return KEY_ECDSA_CERT;
 	case KEY_ECDSA_SK:
 		return KEY_ECDSA_SK_CERT;
 	case KEY_ED25519:
 		return KEY_ED25519_CERT;
 	case KEY_ED25519_SK:
 		return KEY_ED25519_SK_CERT;
 	case KEY_XMSS:
 		return KEY_XMSS_CERT;
 	default:
 		return -1;
 	}
 }
 
 #ifdef WITH_OPENSSL
 /* XXX: these are really begging for a table-driven approach */
 int
 sshkey_curve_name_to_nid(const char *name)
 {
 	if (strcmp(name, "nistp256") == 0)
 		return NID_X9_62_prime256v1;
 	else if (strcmp(name, "nistp384") == 0)
 		return NID_secp384r1;
 # ifdef OPENSSL_HAS_NISTP521
 	else if (strcmp(name, "nistp521") == 0)
 		return NID_secp521r1;
 # endif /* OPENSSL_HAS_NISTP521 */
 	else
 		return -1;
 }
 
 u_int
 sshkey_curve_nid_to_bits(int nid)
 {
 	switch (nid) {
 	case NID_X9_62_prime256v1:
 		return 256;
 	case NID_secp384r1:
 		return 384;
 # ifdef OPENSSL_HAS_NISTP521
 	case NID_secp521r1:
 		return 521;
 # endif /* OPENSSL_HAS_NISTP521 */
 	default:
 		return 0;
 	}
 }
 
 int
 sshkey_ecdsa_bits_to_nid(int bits)
 {
 	switch (bits) {
 	case 256:
 		return NID_X9_62_prime256v1;
 	case 384:
 		return NID_secp384r1;
 # ifdef OPENSSL_HAS_NISTP521
 	case 521:
 		return NID_secp521r1;
 # endif /* OPENSSL_HAS_NISTP521 */
 	default:
 		return -1;
 	}
 }
 
 const char *
 sshkey_curve_nid_to_name(int nid)
 {
 	switch (nid) {
 	case NID_X9_62_prime256v1:
 		return "nistp256";
 	case NID_secp384r1:
 		return "nistp384";
 # ifdef OPENSSL_HAS_NISTP521
 	case NID_secp521r1:
 		return "nistp521";
 # endif /* OPENSSL_HAS_NISTP521 */
 	default:
 		return NULL;
 	}
 }
 
 int
 sshkey_ec_nid_to_hash_alg(int nid)
 {
 	int kbits = sshkey_curve_nid_to_bits(nid);
 
 	if (kbits <= 0)
 		return -1;
 
 	/* RFC5656 section 6.2.1 */
 	if (kbits <= 256)
 		return SSH_DIGEST_SHA256;
 	else if (kbits <= 384)
 		return SSH_DIGEST_SHA384;
 	else
 		return SSH_DIGEST_SHA512;
 }
 #endif /* WITH_OPENSSL */
 
 static void
 cert_free(struct sshkey_cert *cert)
 {
 	u_int i;
 
 	if (cert == NULL)
 		return;
 	sshbuf_free(cert->certblob);
 	sshbuf_free(cert->critical);
 	sshbuf_free(cert->extensions);
 	free(cert->key_id);
 	for (i = 0; i < cert->nprincipals; i++)
 		free(cert->principals[i]);
 	free(cert->principals);
 	sshkey_free(cert->signature_key);
 	free(cert->signature_type);
 	freezero(cert, sizeof(*cert));
 }
 
 static struct sshkey_cert *
 cert_new(void)
 {
 	struct sshkey_cert *cert;
 
 	if ((cert = calloc(1, sizeof(*cert))) == NULL)
 		return NULL;
 	if ((cert->certblob = sshbuf_new()) == NULL ||
 	    (cert->critical = sshbuf_new()) == NULL ||
 	    (cert->extensions = sshbuf_new()) == NULL) {
 		cert_free(cert);
 		return NULL;
 	}
 	cert->key_id = NULL;
 	cert->principals = NULL;
 	cert->signature_key = NULL;
 	cert->signature_type = NULL;
 	return cert;
 }
 
 struct sshkey *
 sshkey_new(int type)
 {
 	struct sshkey *k;
 	const struct sshkey_impl *impl = NULL;
 
 	if (type != KEY_UNSPEC &&
 	    (impl = sshkey_impl_from_type(type)) == NULL)
 		return NULL;
 
 	/* All non-certificate types may act as CAs */
 	if ((k = calloc(1, sizeof(*k))) == NULL)
 		return NULL;
 	k->type = type;
 	k->ecdsa_nid = -1;
 	if (impl != NULL && impl->funcs->alloc != NULL) {
 		if (impl->funcs->alloc(k) != 0) {
 			free(k);
 			return NULL;
 		}
 	}
 	if (sshkey_is_cert(k)) {
 		if ((k->cert = cert_new()) == NULL) {
 			sshkey_free(k);
 			return NULL;
 		}
 	}
 
 	return k;
 }
 
 /* Frees common FIDO fields */
 void
 sshkey_sk_cleanup(struct sshkey *k)
 {
 	free(k->sk_application);
 	sshbuf_free(k->sk_key_handle);
 	sshbuf_free(k->sk_reserved);
 	k->sk_application = NULL;
 	k->sk_key_handle = k->sk_reserved = NULL;
 }
 
 static void
 sshkey_free_contents(struct sshkey *k)
 {
 	const struct sshkey_impl *impl;
 
 	if (k == NULL)
 		return;
 	if ((impl = sshkey_impl_from_type(k->type)) != NULL &&
 	    impl->funcs->cleanup != NULL)
 		impl->funcs->cleanup(k);
 	if (sshkey_is_cert(k))
 		cert_free(k->cert);
 	freezero(k->shielded_private, k->shielded_len);
 	freezero(k->shield_prekey, k->shield_prekey_len);
 }
 
 void
 sshkey_free(struct sshkey *k)
 {
 	sshkey_free_contents(k);
 	freezero(k, sizeof(*k));
 }
 
 static int
 cert_compare(struct sshkey_cert *a, struct sshkey_cert *b)
 {
 	if (a == NULL && b == NULL)
 		return 1;
 	if (a == NULL || b == NULL)
 		return 0;
 	if (sshbuf_len(a->certblob) != sshbuf_len(b->certblob))
 		return 0;
 	if (timingsafe_bcmp(sshbuf_ptr(a->certblob), sshbuf_ptr(b->certblob),
 	    sshbuf_len(a->certblob)) != 0)
 		return 0;
 	return 1;
 }
 
 /* Compares FIDO-specific pubkey fields only */
 int
 sshkey_sk_fields_equal(const struct sshkey *a, const struct sshkey *b)
 {
 	if (a->sk_application == NULL || b->sk_application == NULL)
 		return 0;
 	if (strcmp(a->sk_application, b->sk_application) != 0)
 		return 0;
 	return 1;
 }
 
 /*
  * Compare public portions of key only, allowing comparisons between
  * certificates and plain keys too.
  */
 int
 sshkey_equal_public(const struct sshkey *a, const struct sshkey *b)
 {
 	const struct sshkey_impl *impl;
 
 	if (a == NULL || b == NULL ||
 	    sshkey_type_plain(a->type) != sshkey_type_plain(b->type))
 		return 0;
 	if ((impl = sshkey_impl_from_type(a->type)) == NULL)
 		return 0;
 	return impl->funcs->equal(a, b);
 }
 
 int
 sshkey_equal(const struct sshkey *a, const struct sshkey *b)
 {
 	if (a == NULL || b == NULL || a->type != b->type)
 		return 0;
 	if (sshkey_is_cert(a)) {
 		if (!cert_compare(a->cert, b->cert))
 			return 0;
 	}
 	return sshkey_equal_public(a, b);
 }
 
 
 /* Serialise common FIDO key parts */
 int
 sshkey_serialize_sk(const struct sshkey *key, struct sshbuf *b)
 {
 	int r;
 
 	if ((r = sshbuf_put_cstring(b, key->sk_application)) != 0)
 		return r;
 
 	return 0;
 }
 
 static int
 to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
   enum sshkey_serialize_rep opts)
 {
 	int type, ret = SSH_ERR_INTERNAL_ERROR;
 	const char *typename;
 	const struct sshkey_impl *impl;
 
 	if (key == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	type = force_plain ? sshkey_type_plain(key->type) : key->type;
 
 	if (sshkey_type_is_cert(type)) {
 		if (key->cert == NULL)
 			return SSH_ERR_EXPECTED_CERT;
 		if (sshbuf_len(key->cert->certblob) == 0)
 			return SSH_ERR_KEY_LACKS_CERTBLOB;
 		/* Use the existing blob */
 		if ((ret = sshbuf_putb(b, key->cert->certblob)) != 0)
 			return ret;
 		return 0;
 	}
 	if ((impl = sshkey_impl_from_type(type)) == NULL)
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 
 	typename = sshkey_ssh_name_from_type_nid(type, key->ecdsa_nid);
 	if ((ret = sshbuf_put_cstring(b, typename)) != 0)
 		return ret;
 	return impl->funcs->serialize_public(key, b, opts);
 }
 
 int
 sshkey_putb(const struct sshkey *key, struct sshbuf *b)
 {
 	return to_blob_buf(key, b, 0, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 int
 sshkey_puts_opts(const struct sshkey *key, struct sshbuf *b,
     enum sshkey_serialize_rep opts)
 {
 	struct sshbuf *tmp;
 	int r;
 
 	if ((tmp = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	r = to_blob_buf(key, tmp, 0, opts);
 	if (r == 0)
 		r = sshbuf_put_stringb(b, tmp);
 	sshbuf_free(tmp);
 	return r;
 }
 
 int
 sshkey_puts(const struct sshkey *key, struct sshbuf *b)
 {
 	return sshkey_puts_opts(key, b, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 int
 sshkey_putb_plain(const struct sshkey *key, struct sshbuf *b)
 {
 	return to_blob_buf(key, b, 1, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 static int
 to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp, int force_plain,
     enum sshkey_serialize_rep opts)
 {
 	int ret = SSH_ERR_INTERNAL_ERROR;
 	size_t len;
 	struct sshbuf *b = NULL;
 
 	if (lenp != NULL)
 		*lenp = 0;
 	if (blobp != NULL)
 		*blobp = NULL;
 	if ((b = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((ret = to_blob_buf(key, b, force_plain, opts)) != 0)
 		goto out;
 	len = sshbuf_len(b);
 	if (lenp != NULL)
 		*lenp = len;
 	if (blobp != NULL) {
 		if ((*blobp = malloc(len)) == NULL) {
 			ret = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		memcpy(*blobp, sshbuf_ptr(b), len);
 	}
 	ret = 0;
  out:
 	sshbuf_free(b);
 	return ret;
 }
 
 int
 sshkey_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
 {
 	return to_blob(key, blobp, lenp, 0, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 int
 sshkey_plain_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
 {
 	return to_blob(key, blobp, lenp, 1, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 int
 sshkey_fingerprint_raw(const struct sshkey *k, int dgst_alg,
     u_char **retp, size_t *lenp)
 {
 	u_char *blob = NULL, *ret = NULL;
 	size_t blob_len = 0;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (retp != NULL)
 		*retp = NULL;
 	if (lenp != NULL)
 		*lenp = 0;
 	if (ssh_digest_bytes(dgst_alg) == 0) {
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
 	}
 	if ((r = to_blob(k, &blob, &blob_len, 1, SSHKEY_SERIALIZE_DEFAULT))
 	    != 0)
 		goto out;
 	if ((ret = calloc(1, SSH_DIGEST_MAX_LENGTH)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = ssh_digest_memory(dgst_alg, blob, blob_len,
 	    ret, SSH_DIGEST_MAX_LENGTH)) != 0)
 		goto out;
 	/* success */
 	if (retp != NULL) {
 		*retp = ret;
 		ret = NULL;
 	}
 	if (lenp != NULL)
 		*lenp = ssh_digest_bytes(dgst_alg);
 	r = 0;
  out:
 	free(ret);
 	if (blob != NULL)
 		freezero(blob, blob_len);
 	return r;
 }
 
 static char *
 fingerprint_b64(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
 {
 	char *ret;
 	size_t plen = strlen(alg) + 1;
 	size_t rlen = ((dgst_raw_len + 2) / 3) * 4 + plen + 1;
 
 	if (dgst_raw_len > 65536 || (ret = calloc(1, rlen)) == NULL)
 		return NULL;
 	strlcpy(ret, alg, rlen);
 	strlcat(ret, ":", rlen);
 	if (dgst_raw_len == 0)
 		return ret;
 	if (b64_ntop(dgst_raw, dgst_raw_len, ret + plen, rlen - plen) == -1) {
 		freezero(ret, rlen);
 		return NULL;
 	}
 	/* Trim padding characters from end */
 	ret[strcspn(ret, "=")] = '\0';
 	return ret;
 }
 
 static char *
 fingerprint_hex(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
 {
 	char *retval, hex[5];
 	size_t i, rlen = dgst_raw_len * 3 + strlen(alg) + 2;
 
 	if (dgst_raw_len > 65536 || (retval = calloc(1, rlen)) == NULL)
 		return NULL;
 	strlcpy(retval, alg, rlen);
 	strlcat(retval, ":", rlen);
 	for (i = 0; i < dgst_raw_len; i++) {
 		snprintf(hex, sizeof(hex), "%s%02x",
 		    i > 0 ? ":" : "", dgst_raw[i]);
 		strlcat(retval, hex, rlen);
 	}
 	return retval;
 }
 
 static char *
 fingerprint_bubblebabble(u_char *dgst_raw, size_t dgst_raw_len)
 {
 	char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' };
 	char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
 	    'n', 'p', 'r', 's', 't', 'v', 'z', 'x' };
 	u_int i, j = 0, rounds, seed = 1;
 	char *retval;
 
 	rounds = (dgst_raw_len / 2) + 1;
 	if ((retval = calloc(rounds, 6)) == NULL)
 		return NULL;
 	retval[j++] = 'x';
 	for (i = 0; i < rounds; i++) {
 		u_int idx0, idx1, idx2, idx3, idx4;
 		if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) {
 			idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) +
 			    seed) % 6;
 			idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15;
 			idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) +
 			    (seed / 6)) % 6;
 			retval[j++] = vowels[idx0];
 			retval[j++] = consonants[idx1];
 			retval[j++] = vowels[idx2];
 			if ((i + 1) < rounds) {
 				idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15;
 				idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15;
 				retval[j++] = consonants[idx3];
 				retval[j++] = '-';
 				retval[j++] = consonants[idx4];
 				seed = ((seed * 5) +
 				    ((((u_int)(dgst_raw[2 * i])) * 7) +
 				    ((u_int)(dgst_raw[(2 * i) + 1])))) % 36;
 			}
 		} else {
 			idx0 = seed % 6;
 			idx1 = 16;
 			idx2 = seed / 6;
 			retval[j++] = vowels[idx0];
 			retval[j++] = consonants[idx1];
 			retval[j++] = vowels[idx2];
 		}
 	}
 	retval[j++] = 'x';
 	retval[j++] = '\0';
 	return retval;
 }
 
 /*
  * Draw an ASCII-Art representing the fingerprint so human brain can
  * profit from its built-in pattern recognition ability.
  * This technique is called "random art" and can be found in some
  * scientific publications like this original paper:
  *
  * "Hash Visualization: a New Technique to improve Real-World Security",
  * Perrig A. and Song D., 1999, International Workshop on Cryptographic
  * Techniques and E-Commerce (CrypTEC '99)
  * sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf
  *
  * The subject came up in a talk by Dan Kaminsky, too.
  *
  * If you see the picture is different, the key is different.
  * If the picture looks the same, you still know nothing.
  *
  * The algorithm used here is a worm crawling over a discrete plane,
  * leaving a trace (augmenting the field) everywhere it goes.
  * Movement is taken from dgst_raw 2bit-wise.  Bumping into walls
  * makes the respective movement vector be ignored for this turn.
  * Graphs are not unambiguous, because circles in graphs can be
  * walked in either direction.
  */
 
 /*
  * Field sizes for the random art.  Have to be odd, so the starting point
  * can be in the exact middle of the picture, and FLDBASE should be >=8 .
  * Else pictures would be too dense, and drawing the frame would
  * fail, too, because the key type would not fit in anymore.
  */
 #define	FLDBASE		8
 #define	FLDSIZE_Y	(FLDBASE + 1)
 #define	FLDSIZE_X	(FLDBASE * 2 + 1)
 static char *
 fingerprint_randomart(const char *alg, u_char *dgst_raw, size_t dgst_raw_len,
     const struct sshkey *k)
 {
 	/*
 	 * Chars to be used after each other every time the worm
 	 * intersects with itself.  Matter of taste.
 	 */
 	char	*augmentation_string = " .o+=*BOX@%&#/^SE";
 	char	*retval, *p, title[FLDSIZE_X], hash[FLDSIZE_X];
 	u_char	 field[FLDSIZE_X][FLDSIZE_Y];
 	size_t	 i, tlen, hlen;
 	u_int	 b;
 	int	 x, y, r;
 	size_t	 len = strlen(augmentation_string) - 1;
 
 	if ((retval = calloc((FLDSIZE_X + 3), (FLDSIZE_Y + 2))) == NULL)
 		return NULL;
 
 	/* initialize field */
 	memset(field, 0, FLDSIZE_X * FLDSIZE_Y * sizeof(char));
 	x = FLDSIZE_X / 2;
 	y = FLDSIZE_Y / 2;
 
 	/* process raw key */
 	for (i = 0; i < dgst_raw_len; i++) {
 		int input;
 		/* each byte conveys four 2-bit move commands */
 		input = dgst_raw[i];
 		for (b = 0; b < 4; b++) {
 			/* evaluate 2 bit, rest is shifted later */
 			x += (input & 0x1) ? 1 : -1;
 			y += (input & 0x2) ? 1 : -1;
 
 			/* assure we are still in bounds */
 			x = MAXIMUM(x, 0);
 			y = MAXIMUM(y, 0);
 			x = MINIMUM(x, FLDSIZE_X - 1);
 			y = MINIMUM(y, FLDSIZE_Y - 1);
 
 			/* augment the field */
 			if (field[x][y] < len - 2)
 				field[x][y]++;
 			input = input >> 2;
 		}
 	}
 
 	/* mark starting point and end point*/
 	field[FLDSIZE_X / 2][FLDSIZE_Y / 2] = len - 1;
 	field[x][y] = len;
 
 	/* assemble title */
 	r = snprintf(title, sizeof(title), "[%s %u]",
 		sshkey_type(k), sshkey_size(k));
 	/* If [type size] won't fit, then try [type]; fits "[ED25519-CERT]" */
 	if (r < 0 || r > (int)sizeof(title))
 		r = snprintf(title, sizeof(title), "[%s]", sshkey_type(k));
 	tlen = (r <= 0) ? 0 : strlen(title);
 
 	/* assemble hash ID. */
 	r = snprintf(hash, sizeof(hash), "[%s]", alg);
 	hlen = (r <= 0) ? 0 : strlen(hash);
 
 	/* output upper border */
 	p = retval;
 	*p++ = '+';
 	for (i = 0; i < (FLDSIZE_X - tlen) / 2; i++)
 		*p++ = '-';
 	memcpy(p, title, tlen);
 	p += tlen;
 	for (i += tlen; i < FLDSIZE_X; i++)
 		*p++ = '-';
 	*p++ = '+';
 	*p++ = '\n';
 
 	/* output content */
 	for (y = 0; y < FLDSIZE_Y; y++) {
 		*p++ = '|';
 		for (x = 0; x < FLDSIZE_X; x++)
 			*p++ = augmentation_string[MINIMUM(field[x][y], len)];
 		*p++ = '|';
 		*p++ = '\n';
 	}
 
 	/* output lower border */
 	*p++ = '+';
 	for (i = 0; i < (FLDSIZE_X - hlen) / 2; i++)
 		*p++ = '-';
 	memcpy(p, hash, hlen);
 	p += hlen;
 	for (i += hlen; i < FLDSIZE_X; i++)
 		*p++ = '-';
 	*p++ = '+';
 
 	return retval;
 }
 
 char *
 sshkey_fingerprint(const struct sshkey *k, int dgst_alg,
     enum sshkey_fp_rep dgst_rep)
 {
 	char *retval = NULL;
 	u_char *dgst_raw;
 	size_t dgst_raw_len;
 
 	if (sshkey_fingerprint_raw(k, dgst_alg, &dgst_raw, &dgst_raw_len) != 0)
 		return NULL;
 	switch (dgst_rep) {
 	case SSH_FP_DEFAULT:
 		if (dgst_alg == SSH_DIGEST_MD5) {
 			retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
 			    dgst_raw, dgst_raw_len);
 		} else {
 			retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
 			    dgst_raw, dgst_raw_len);
 		}
 		break;
 	case SSH_FP_HEX:
 		retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
 		    dgst_raw, dgst_raw_len);
 		break;
 	case SSH_FP_BASE64:
 		retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
 		    dgst_raw, dgst_raw_len);
 		break;
 	case SSH_FP_BUBBLEBABBLE:
 		retval = fingerprint_bubblebabble(dgst_raw, dgst_raw_len);
 		break;
 	case SSH_FP_RANDOMART:
 		retval = fingerprint_randomart(ssh_digest_alg_name(dgst_alg),
 		    dgst_raw, dgst_raw_len, k);
 		break;
 	default:
 		freezero(dgst_raw, dgst_raw_len);
 		return NULL;
 	}
 	freezero(dgst_raw, dgst_raw_len);
 	return retval;
 }
 
 static int
 peek_type_nid(const char *s, size_t l, int *nid)
 {
 	const struct sshkey_impl *impl;
 	int i;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		impl = keyimpls[i];
 		if (impl->name == NULL || strlen(impl->name) != l)
 			continue;
 		if (memcmp(s, impl->name, l) == 0) {
 			*nid = -1;
 			if (key_type_is_ecdsa_variant(impl->type))
 				*nid = impl->nid;
 			return impl->type;
 		}
 	}
 	return KEY_UNSPEC;
 }
 
 /* XXX this can now be made const char * */
 int
 sshkey_read(struct sshkey *ret, char **cpp)
 {
 	struct sshkey *k;
 	char *cp, *blobcopy;
 	size_t space;
 	int r, type, curve_nid = -1;
 	struct sshbuf *blob;
 
 	if (ret == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (ret->type != KEY_UNSPEC && sshkey_impl_from_type(ret->type) == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	/* Decode type */
 	cp = *cpp;
 	space = strcspn(cp, " \t");
 	if (space == strlen(cp))
 		return SSH_ERR_INVALID_FORMAT;
 	if ((type = peek_type_nid(cp, space, &curve_nid)) == KEY_UNSPEC)
 		return SSH_ERR_INVALID_FORMAT;
 
 	/* skip whitespace */
 	for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
 		;
 	if (*cp == '\0')
 		return SSH_ERR_INVALID_FORMAT;
 	if (ret->type != KEY_UNSPEC && ret->type != type)
 		return SSH_ERR_KEY_TYPE_MISMATCH;
 	if ((blob = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 
 	/* find end of keyblob and decode */
 	space = strcspn(cp, " \t");
 	if ((blobcopy = strndup(cp, space)) == NULL) {
 		sshbuf_free(blob);
 		return SSH_ERR_ALLOC_FAIL;
 	}
 	if ((r = sshbuf_b64tod(blob, blobcopy)) != 0) {
 		free(blobcopy);
 		sshbuf_free(blob);
 		return r;
 	}
 	free(blobcopy);
 	if ((r = sshkey_fromb(blob, &k)) != 0) {
 		sshbuf_free(blob);
 		return r;
 	}
 	sshbuf_free(blob);
 
 	/* skip whitespace and leave cp at start of comment */
 	for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
 		;
 
 	/* ensure type of blob matches type at start of line */
 	if (k->type != type) {
 		sshkey_free(k);
 		return SSH_ERR_KEY_TYPE_MISMATCH;
 	}
 	if (key_type_is_ecdsa_variant(type) && curve_nid != k->ecdsa_nid) {
 		sshkey_free(k);
 		return SSH_ERR_EC_CURVE_MISMATCH;
 	}
 
 	/* Fill in ret from parsed key */
 	sshkey_free_contents(ret);
 	*ret = *k;
 	freezero(k, sizeof(*k));
 
 	/* success */
 	*cpp = cp;
 	return 0;
 }
 
 int
 sshkey_to_base64(const struct sshkey *key, char **b64p)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *b = NULL;
 	char *uu = NULL;
 
 	if (b64p != NULL)
 		*b64p = NULL;
 	if ((b = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshkey_putb(key, b)) != 0)
 		goto out;
 	if ((uu = sshbuf_dtob64_string(b, 0)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	/* Success */
 	if (b64p != NULL) {
 		*b64p = uu;
 		uu = NULL;
 	}
 	r = 0;
  out:
 	sshbuf_free(b);
 	free(uu);
 	return r;
 }
 
 int
 sshkey_format_text(const struct sshkey *key, struct sshbuf *b)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	char *uu = NULL;
 
 	if ((r = sshkey_to_base64(key, &uu)) != 0)
 		goto out;
 	if ((r = sshbuf_putf(b, "%s %s",
 	    sshkey_ssh_name(key), uu)) != 0)
 		goto out;
 	r = 0;
  out:
 	free(uu);
 	return r;
 }
 
 int
 sshkey_write(const struct sshkey *key, FILE *f)
 {
 	struct sshbuf *b = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if ((b = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshkey_format_text(key, b)) != 0)
 		goto out;
 	if (fwrite(sshbuf_ptr(b), sshbuf_len(b), 1, f) != 1) {
 		if (feof(f))
 			errno = EPIPE;
 		r = SSH_ERR_SYSTEM_ERROR;
 		goto out;
 	}
 	/* Success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	return r;
 }
 
 const char *
 sshkey_cert_type(const struct sshkey *k)
 {
 	switch (k->cert->type) {
 	case SSH2_CERT_TYPE_USER:
 		return "user";
 	case SSH2_CERT_TYPE_HOST:
 		return "host";
 	default:
 		return "unknown";
 	}
 }
 
 int
 sshkey_check_rsa_length(const struct sshkey *k, int min_size)
 {
 #ifdef WITH_OPENSSL
 	const BIGNUM *rsa_n;
 	int nbits;
 
 	if (k == NULL || k->rsa == NULL ||
 	    (k->type != KEY_RSA && k->type != KEY_RSA_CERT))
 		return 0;
 	RSA_get0_key(k->rsa, &rsa_n, NULL, NULL);
 	nbits = BN_num_bits(rsa_n);
 	if (nbits < SSH_RSA_MINIMUM_MODULUS_SIZE ||
 	    (min_size > 0 && nbits < min_size))
 		return SSH_ERR_KEY_LENGTH;
 #endif /* WITH_OPENSSL */
 	return 0;
 }
 
 #ifdef WITH_OPENSSL
 # ifdef OPENSSL_HAS_ECC
 int
 sshkey_ecdsa_key_to_nid(EC_KEY *k)
 {
 	EC_GROUP *eg;
 	int nids[] = {
 		NID_X9_62_prime256v1,
 		NID_secp384r1,
 #  ifdef OPENSSL_HAS_NISTP521
 		NID_secp521r1,
 #  endif /* OPENSSL_HAS_NISTP521 */
 		-1
 	};
 	int nid;
 	u_int i;
 	const EC_GROUP *g = EC_KEY_get0_group(k);
 
 	/*
 	 * The group may be stored in a ASN.1 encoded private key in one of two
 	 * ways: as a "named group", which is reconstituted by ASN.1 object ID
 	 * or explicit group parameters encoded into the key blob. Only the
 	 * "named group" case sets the group NID for us, but we can figure
 	 * it out for the other case by comparing against all the groups that
 	 * are supported.
 	 */
 	if ((nid = EC_GROUP_get_curve_name(g)) > 0)
 		return nid;
 	for (i = 0; nids[i] != -1; i++) {
 		if ((eg = EC_GROUP_new_by_curve_name(nids[i])) == NULL)
 			return -1;
 		if (EC_GROUP_cmp(g, eg, NULL) == 0)
 			break;
 		EC_GROUP_free(eg);
 	}
 	if (nids[i] != -1) {
 		/* Use the group with the NID attached */
 		EC_GROUP_set_asn1_flag(eg, OPENSSL_EC_NAMED_CURVE);
 		if (EC_KEY_set_group(k, eg) != 1) {
 			EC_GROUP_free(eg);
 			return -1;
 		}
 	}
 	return nids[i];
 }
 # endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
 
 int
 sshkey_generate(int type, u_int bits, struct sshkey **keyp)
 {
 	struct sshkey *k;
 	int ret = SSH_ERR_INTERNAL_ERROR;
 	const struct sshkey_impl *impl;
 
 	if (keyp == NULL || sshkey_type_is_cert(type))
 		return SSH_ERR_INVALID_ARGUMENT;
 	*keyp = NULL;
 	if ((impl = sshkey_impl_from_type(type)) == NULL)
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	if (impl->funcs->generate == NULL)
 		return SSH_ERR_FEATURE_UNSUPPORTED;
 	if ((k = sshkey_new(KEY_UNSPEC)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	k->type = type;
 	if ((ret = impl->funcs->generate(k, bits)) != 0) {
 		sshkey_free(k);
 		return ret;
 	}
 	/* success */
 	*keyp = k;
 	return 0;
 }
 
 int
 sshkey_cert_copy(const struct sshkey *from_key, struct sshkey *to_key)
 {
 	u_int i;
 	const struct sshkey_cert *from;
 	struct sshkey_cert *to;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (to_key == NULL || (from = from_key->cert) == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	if ((to = cert_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 
 	if ((r = sshbuf_putb(to->certblob, from->certblob)) != 0 ||
 	    (r = sshbuf_putb(to->critical, from->critical)) != 0 ||
 	    (r = sshbuf_putb(to->extensions, from->extensions)) != 0)
 		goto out;
 
 	to->serial = from->serial;
 	to->type = from->type;
 	if (from->key_id == NULL)
 		to->key_id = NULL;
 	else if ((to->key_id = strdup(from->key_id)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	to->valid_after = from->valid_after;
 	to->valid_before = from->valid_before;
 	if (from->signature_key == NULL)
 		to->signature_key = NULL;
 	else if ((r = sshkey_from_private(from->signature_key,
 	    &to->signature_key)) != 0)
 		goto out;
 	if (from->signature_type != NULL &&
 	    (to->signature_type = strdup(from->signature_type)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (from->nprincipals > SSHKEY_CERT_MAX_PRINCIPALS) {
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
 	}
 	if (from->nprincipals > 0) {
 		if ((to->principals = calloc(from->nprincipals,
 		    sizeof(*to->principals))) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		for (i = 0; i < from->nprincipals; i++) {
 			to->principals[i] = strdup(from->principals[i]);
 			if (to->principals[i] == NULL) {
 				to->nprincipals = i;
 				r = SSH_ERR_ALLOC_FAIL;
 				goto out;
 			}
 		}
 	}
 	to->nprincipals = from->nprincipals;
 
 	/* success */
 	cert_free(to_key->cert);
 	to_key->cert = to;
 	to = NULL;
 	r = 0;
  out:
 	cert_free(to);
 	return r;
 }
 
 int
 sshkey_copy_public_sk(const struct sshkey *from, struct sshkey *to)
 {
 	/* Append security-key application string */
 	if ((to->sk_application = strdup(from->sk_application)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	return 0;
 }
 
 int
 sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
 {
 	struct sshkey *n = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	const struct sshkey_impl *impl;
 
 	*pkp = NULL;
 	if ((impl = sshkey_impl_from_key(k)) == NULL)
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	if ((n = sshkey_new(k->type)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = impl->funcs->copy_public(k, n)) != 0)
 		goto out;
 	if (sshkey_is_cert(k) && (r = sshkey_cert_copy(k, n)) != 0)
 		goto out;
 	/* success */
 	*pkp = n;
 	n = NULL;
 	r = 0;
  out:
 	sshkey_free(n);
 	return r;
 }
 
 int
 sshkey_is_shielded(struct sshkey *k)
 {
 	return k != NULL && k->shielded_private != NULL;
 }
 
 int
 sshkey_shield_private(struct sshkey *k)
 {
 	struct sshbuf *prvbuf = NULL;
 	u_char *prekey = NULL, *enc = NULL, keyiv[SSH_DIGEST_MAX_LENGTH];
 	struct sshcipher_ctx *cctx = NULL;
 	const struct sshcipher *cipher;
 	size_t i, enclen = 0;
 	struct sshkey *kswap = NULL, tmp;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: entering for %s\n", __func__, sshkey_ssh_name(k));
 #endif
 	if ((cipher = cipher_by_name(SSHKEY_SHIELD_CIPHER)) == NULL) {
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
 	}
 	if (cipher_keylen(cipher) + cipher_ivlen(cipher) >
 	    ssh_digest_bytes(SSHKEY_SHIELD_PREKEY_HASH)) {
 		r = SSH_ERR_INTERNAL_ERROR;
 		goto out;
 	}
 
 	/* Prepare a random pre-key, and from it an ephemeral key */
 	if ((prekey = malloc(SSHKEY_SHIELD_PREKEY_LEN)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	arc4random_buf(prekey, SSHKEY_SHIELD_PREKEY_LEN);
 	if ((r = ssh_digest_memory(SSHKEY_SHIELD_PREKEY_HASH,
 	    prekey, SSHKEY_SHIELD_PREKEY_LEN,
 	    keyiv, SSH_DIGEST_MAX_LENGTH)) != 0)
 		goto out;
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: key+iv\n", __func__);
 	sshbuf_dump_data(keyiv, ssh_digest_bytes(SSHKEY_SHIELD_PREKEY_HASH),
 	    stderr);
 #endif
 	if ((r = cipher_init(&cctx, cipher, keyiv, cipher_keylen(cipher),
 	    keyiv + cipher_keylen(cipher), cipher_ivlen(cipher), 1)) != 0)
 		goto out;
 
 	/* Serialise and encrypt the private key using the ephemeral key */
 	if ((prvbuf = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (sshkey_is_shielded(k) && (r = sshkey_unshield_private(k)) != 0)
 		goto out;
 	if ((r = sshkey_private_serialize_opt(k, prvbuf,
 	    SSHKEY_SERIALIZE_SHIELD)) != 0)
 		goto out;
 	/* pad to cipher blocksize */
 	i = 0;
 	while (sshbuf_len(prvbuf) % cipher_blocksize(cipher)) {
 		if ((r = sshbuf_put_u8(prvbuf, ++i & 0xff)) != 0)
 			goto out;
 	}
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: serialised\n", __func__);
 	sshbuf_dump(prvbuf, stderr);
 #endif
 	/* encrypt */
 	enclen = sshbuf_len(prvbuf);
 	if ((enc = malloc(enclen)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = cipher_crypt(cctx, 0, enc,
 	    sshbuf_ptr(prvbuf), sshbuf_len(prvbuf), 0, 0)) != 0)
 		goto out;
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: encrypted\n", __func__);
 	sshbuf_dump_data(enc, enclen, stderr);
 #endif
 
 	/* Make a scrubbed, public-only copy of our private key argument */
 	if ((r = sshkey_from_private(k, &kswap)) != 0)
 		goto out;
 
 	/* Swap the private key out (it will be destroyed below) */
 	tmp = *kswap;
 	*kswap = *k;
 	*k = tmp;
 
 	/* Insert the shielded key into our argument */
 	k->shielded_private = enc;
 	k->shielded_len = enclen;
 	k->shield_prekey = prekey;
 	k->shield_prekey_len = SSHKEY_SHIELD_PREKEY_LEN;
 	enc = prekey = NULL; /* transferred */
 	enclen = 0;
 
 	/* preserve key fields that are required for correct operation */
 	k->sk_flags = kswap->sk_flags;
 
 	/* success */
 	r = 0;
 
  out:
 	/* XXX behaviour on error - invalidate original private key? */
 	cipher_free(cctx);
 	explicit_bzero(keyiv, sizeof(keyiv));
 	explicit_bzero(&tmp, sizeof(tmp));
 	freezero(enc, enclen);
 	freezero(prekey, SSHKEY_SHIELD_PREKEY_LEN);
 	sshkey_free(kswap);
 	sshbuf_free(prvbuf);
 	return r;
 }
 
 /* Check deterministic padding after private key */
 static int
 private2_check_padding(struct sshbuf *decrypted)
 {
 	u_char pad;
 	size_t i;
 	int r;
 
 	i = 0;
 	while (sshbuf_len(decrypted)) {
 		if ((r = sshbuf_get_u8(decrypted, &pad)) != 0)
 			goto out;
 		if (pad != (++i & 0xff)) {
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 	/* success */
 	r = 0;
  out:
 	explicit_bzero(&pad, sizeof(pad));
 	explicit_bzero(&i, sizeof(i));
 	return r;
 }
 
 int
 sshkey_unshield_private(struct sshkey *k)
 {
 	struct sshbuf *prvbuf = NULL;
 	u_char *cp, keyiv[SSH_DIGEST_MAX_LENGTH];
 	struct sshcipher_ctx *cctx = NULL;
 	const struct sshcipher *cipher;
 	struct sshkey *kswap = NULL, tmp;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: entering for %s\n", __func__, sshkey_ssh_name(k));
 #endif
 	if (!sshkey_is_shielded(k))
 		return 0; /* nothing to do */
 
 	if ((cipher = cipher_by_name(SSHKEY_SHIELD_CIPHER)) == NULL) {
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
 	}
 	if (cipher_keylen(cipher) + cipher_ivlen(cipher) >
 	    ssh_digest_bytes(SSHKEY_SHIELD_PREKEY_HASH)) {
 		r = SSH_ERR_INTERNAL_ERROR;
 		goto out;
 	}
 	/* check size of shielded key blob */
 	if (k->shielded_len < cipher_blocksize(cipher) ||
 	    (k->shielded_len % cipher_blocksize(cipher)) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* Calculate the ephemeral key from the prekey */
 	if ((r = ssh_digest_memory(SSHKEY_SHIELD_PREKEY_HASH,
 	    k->shield_prekey, k->shield_prekey_len,
 	    keyiv, SSH_DIGEST_MAX_LENGTH)) != 0)
 		goto out;
 	if ((r = cipher_init(&cctx, cipher, keyiv, cipher_keylen(cipher),
 	    keyiv + cipher_keylen(cipher), cipher_ivlen(cipher), 0)) != 0)
 		goto out;
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: key+iv\n", __func__);
 	sshbuf_dump_data(keyiv, ssh_digest_bytes(SSHKEY_SHIELD_PREKEY_HASH),
 	    stderr);
 #endif
 
 	/* Decrypt and parse the shielded private key using the ephemeral key */
 	if ((prvbuf = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = sshbuf_reserve(prvbuf, k->shielded_len, &cp)) != 0)
 		goto out;
 	/* decrypt */
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: encrypted\n", __func__);
 	sshbuf_dump_data(k->shielded_private, k->shielded_len, stderr);
 #endif
 	if ((r = cipher_crypt(cctx, 0, cp,
 	    k->shielded_private, k->shielded_len, 0, 0)) != 0)
 		goto out;
 #ifdef DEBUG_PK
 	fprintf(stderr, "%s: serialised\n", __func__);
 	sshbuf_dump(prvbuf, stderr);
 #endif
 	/* Parse private key */
 	if ((r = sshkey_private_deserialize(prvbuf, &kswap)) != 0)
 		goto out;
 
 	if ((r = private2_check_padding(prvbuf)) != 0)
 		goto out;
 
 	/* Swap the parsed key back into place */
 	tmp = *kswap;
 	*kswap = *k;
 	*k = tmp;
 
 	/* success */
 	r = 0;
 
  out:
 	cipher_free(cctx);
 	explicit_bzero(keyiv, sizeof(keyiv));
 	explicit_bzero(&tmp, sizeof(tmp));
 	sshkey_free(kswap);
 	sshbuf_free(prvbuf);
 	return r;
 }
 
 static int
 cert_parse(struct sshbuf *b, struct sshkey *key, struct sshbuf *certbuf)
 {
 	struct sshbuf *principals = NULL, *crit = NULL;
 	struct sshbuf *exts = NULL, *ca = NULL;
 	u_char *sig = NULL;
 	size_t signed_len = 0, slen = 0, kidlen = 0;
 	int ret = SSH_ERR_INTERNAL_ERROR;
 
 	/* Copy the entire key blob for verification and later serialisation */
 	if ((ret = sshbuf_putb(key->cert->certblob, certbuf)) != 0)
 		return ret;
 
 	/* Parse body of certificate up to signature */
 	if ((ret = sshbuf_get_u64(b, &key->cert->serial)) != 0 ||
 	    (ret = sshbuf_get_u32(b, &key->cert->type)) != 0 ||
 	    (ret = sshbuf_get_cstring(b, &key->cert->key_id, &kidlen)) != 0 ||
 	    (ret = sshbuf_froms(b, &principals)) != 0 ||
 	    (ret = sshbuf_get_u64(b, &key->cert->valid_after)) != 0 ||
 	    (ret = sshbuf_get_u64(b, &key->cert->valid_before)) != 0 ||
 	    (ret = sshbuf_froms(b, &crit)) != 0 ||
 	    (ret = sshbuf_froms(b, &exts)) != 0 ||
 	    (ret = sshbuf_get_string_direct(b, NULL, NULL)) != 0 ||
 	    (ret = sshbuf_froms(b, &ca)) != 0) {
 		/* XXX debug print error for ret */
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* Signature is left in the buffer so we can calculate this length */
 	signed_len = sshbuf_len(key->cert->certblob) - sshbuf_len(b);
 
 	if ((ret = sshbuf_get_string(b, &sig, &slen)) != 0) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	if (key->cert->type != SSH2_CERT_TYPE_USER &&
 	    key->cert->type != SSH2_CERT_TYPE_HOST) {
 		ret = SSH_ERR_KEY_CERT_UNKNOWN_TYPE;
 		goto out;
 	}
 
 	/* Parse principals section */
 	while (sshbuf_len(principals) > 0) {
 		char *principal = NULL;
 		char **oprincipals = NULL;
 
 		if (key->cert->nprincipals >= SSHKEY_CERT_MAX_PRINCIPALS) {
 			ret = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		if ((ret = sshbuf_get_cstring(principals, &principal,
 		    NULL)) != 0) {
 			ret = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		oprincipals = key->cert->principals;
 		key->cert->principals = recallocarray(key->cert->principals,
 		    key->cert->nprincipals, key->cert->nprincipals + 1,
 		    sizeof(*key->cert->principals));
 		if (key->cert->principals == NULL) {
 			free(principal);
 			key->cert->principals = oprincipals;
 			ret = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		key->cert->principals[key->cert->nprincipals++] = principal;
 	}
 
 	/*
 	 * Stash a copies of the critical options and extensions sections
 	 * for later use.
 	 */
 	if ((ret = sshbuf_putb(key->cert->critical, crit)) != 0 ||
 	    (exts != NULL &&
 	    (ret = sshbuf_putb(key->cert->extensions, exts)) != 0))
 		goto out;
 
 	/*
 	 * Validate critical options and extensions sections format.
 	 */
 	while (sshbuf_len(crit) != 0) {
 		if ((ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0 ||
 		    (ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0) {
 			sshbuf_reset(key->cert->critical);
 			ret = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 	while (exts != NULL && sshbuf_len(exts) != 0) {
 		if ((ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0 ||
 		    (ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0) {
 			sshbuf_reset(key->cert->extensions);
 			ret = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 
 	/* Parse CA key and check signature */
 	if (sshkey_from_blob_internal(ca, &key->cert->signature_key, 0) != 0) {
 		ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
 		goto out;
 	}
 	if (!sshkey_type_is_valid_ca(key->cert->signature_key->type)) {
 		ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
 		goto out;
 	}
 	if ((ret = sshkey_verify(key->cert->signature_key, sig, slen,
 	    sshbuf_ptr(key->cert->certblob), signed_len, NULL, 0, NULL)) != 0)
 		goto out;
 	if ((ret = sshkey_get_sigtype(sig, slen,
 	    &key->cert->signature_type)) != 0)
 		goto out;
 
 	/* Success */
 	ret = 0;
  out:
 	sshbuf_free(ca);
 	sshbuf_free(crit);
 	sshbuf_free(exts);
 	sshbuf_free(principals);
 	free(sig);
 	return ret;
 }
 
 int
 sshkey_deserialize_sk(struct sshbuf *b, struct sshkey *key)
 {
 	/* Parse additional security-key application string */
 	if (sshbuf_get_cstring(b, &key->sk_application, NULL) != 0)
 		return SSH_ERR_INVALID_FORMAT;
 	return 0;
 }
 
 static int
 sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
     int allow_cert)
 {
 	int type, ret = SSH_ERR_INTERNAL_ERROR;
 	char *ktype = NULL;
 	struct sshkey *key = NULL;
 	struct sshbuf *copy;
 	const struct sshkey_impl *impl;
 
 #ifdef DEBUG_PK /* XXX */
 	sshbuf_dump(b, stderr);
 #endif
 	if (keyp != NULL)
 		*keyp = NULL;
 	if ((copy = sshbuf_fromb(b)) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (sshbuf_get_cstring(b, &ktype, NULL) != 0) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	type = sshkey_type_from_name(ktype);
 	if (!allow_cert && sshkey_type_is_cert(type)) {
 		ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
 		goto out;
 	}
 	if ((impl = sshkey_impl_from_type(type)) == NULL) {
 		ret = SSH_ERR_KEY_TYPE_UNKNOWN;
 		goto out;
 	}
 	if ((key = sshkey_new(type)) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (sshkey_type_is_cert(type)) {
-		/* Skip nonce that preceeds all certificates */
+		/* Skip nonce that precedes all certificates */
 		if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
 			ret = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 	if ((ret = impl->funcs->deserialize_public(ktype, b, key)) != 0)
 		goto out;
 
 	/* Parse certificate potion */
 	if (sshkey_is_cert(key) && (ret = cert_parse(b, key, copy)) != 0)
 		goto out;
 
 	if (key != NULL && sshbuf_len(b) != 0) {
 		ret = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	ret = 0;
 	if (keyp != NULL) {
 		*keyp = key;
 		key = NULL;
 	}
  out:
 	sshbuf_free(copy);
 	sshkey_free(key);
 	free(ktype);
 	return ret;
 }
 
 int
 sshkey_from_blob(const u_char *blob, size_t blen, struct sshkey **keyp)
 {
 	struct sshbuf *b;
 	int r;
 
 	if ((b = sshbuf_from(blob, blen)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	r = sshkey_from_blob_internal(b, keyp, 1);
 	sshbuf_free(b);
 	return r;
 }
 
 int
 sshkey_fromb(struct sshbuf *b, struct sshkey **keyp)
 {
 	return sshkey_from_blob_internal(b, keyp, 1);
 }
 
 int
 sshkey_froms(struct sshbuf *buf, struct sshkey **keyp)
 {
 	struct sshbuf *b;
 	int r;
 
 	if ((r = sshbuf_froms(buf, &b)) != 0)
 		return r;
 	r = sshkey_from_blob_internal(b, keyp, 1);
 	sshbuf_free(b);
 	return r;
 }
 
 int
 sshkey_get_sigtype(const u_char *sig, size_t siglen, char **sigtypep)
 {
 	int r;
 	struct sshbuf *b = NULL;
 	char *sigtype = NULL;
 
 	if (sigtypep != NULL)
 		*sigtypep = NULL;
 	if ((b = sshbuf_from(sig, siglen)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshbuf_get_cstring(b, &sigtype, NULL)) != 0)
 		goto out;
 	/* success */
 	if (sigtypep != NULL) {
 		*sigtypep = sigtype;
 		sigtype = NULL;
 	}
 	r = 0;
  out:
 	free(sigtype);
 	sshbuf_free(b);
 	return r;
 }
 
 /*
  *
  * Checks whether a certificate's signature type is allowed.
  * Returns 0 (success) if the certificate signature type appears in the
  * "allowed" pattern-list, or the key is not a certificate to begin with.
  * Otherwise returns a ssherr.h code.
  */
 int
 sshkey_check_cert_sigtype(const struct sshkey *key, const char *allowed)
 {
 	if (key == NULL || allowed == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (!sshkey_type_is_cert(key->type))
 		return 0;
 	if (key->cert == NULL || key->cert->signature_type == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (match_pattern_list(key->cert->signature_type, allowed, 0) != 1)
 		return SSH_ERR_SIGN_ALG_UNSUPPORTED;
 	return 0;
 }
 
 /*
  * Returns the expected signature algorithm for a given public key algorithm.
  */
 const char *
 sshkey_sigalg_by_name(const char *name)
 {
 	const struct sshkey_impl *impl;
 	int i;
 
 	for (i = 0; keyimpls[i] != NULL; i++) {
 		impl = keyimpls[i];
 		if (strcmp(impl->name, name) != 0)
 			continue;
 		if (impl->sigalg != NULL)
 			return impl->sigalg;
 		if (!impl->cert)
 			return impl->name;
 		return sshkey_ssh_name_from_type_nid(
 		    sshkey_type_plain(impl->type), impl->nid);
 	}
 	return NULL;
 }
 
 /*
  * Verifies that the signature algorithm appearing inside the signature blob
  * matches that which was requested.
  */
 int
 sshkey_check_sigtype(const u_char *sig, size_t siglen,
     const char *requested_alg)
 {
 	const char *expected_alg;
 	char *sigtype = NULL;
 	int r;
 
 	if (requested_alg == NULL)
 		return 0;
 	if ((expected_alg = sshkey_sigalg_by_name(requested_alg)) == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((r = sshkey_get_sigtype(sig, siglen, &sigtype)) != 0)
 		return r;
 	r = strcmp(expected_alg, sigtype) == 0;
 	free(sigtype);
 	return r ? 0 : SSH_ERR_SIGN_ALG_UNSUPPORTED;
 }
 
 int
 sshkey_sign(struct sshkey *key,
     u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen,
     const char *alg, const char *sk_provider, const char *sk_pin, u_int compat)
 {
 	int was_shielded = sshkey_is_shielded(key);
 	int r2, r = SSH_ERR_INTERNAL_ERROR;
 	const struct sshkey_impl *impl;
 
 	if (sigp != NULL)
 		*sigp = NULL;
 	if (lenp != NULL)
 		*lenp = 0;
 	if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((impl = sshkey_impl_from_key(key)) == NULL)
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	if ((r = sshkey_unshield_private(key)) != 0)
 		return r;
 	if (sshkey_is_sk(key)) {
 		r = sshsk_sign(sk_provider, key, sigp, lenp, data,
 		    datalen, compat, sk_pin);
 	} else {
 		if (impl->funcs->sign == NULL)
 			r = SSH_ERR_SIGN_ALG_UNSUPPORTED;
 		else {
 			r = impl->funcs->sign(key, sigp, lenp, data, datalen,
 			    alg, sk_provider, sk_pin, compat);
 		 }
 	}
 	if (was_shielded && (r2 = sshkey_shield_private(key)) != 0)
 		return r2;
 	return r;
 }
 
 /*
  * ssh_key_verify returns 0 for a correct signature  and < 0 on error.
  * If "alg" specified, then the signature must use that algorithm.
  */
 int
 sshkey_verify(const struct sshkey *key,
     const u_char *sig, size_t siglen,
     const u_char *data, size_t dlen, const char *alg, u_int compat,
     struct sshkey_sig_details **detailsp)
 {
 	const struct sshkey_impl *impl;
 
 	if (detailsp != NULL)
 		*detailsp = NULL;
 	if (siglen == 0 || dlen > SSH_KEY_MAX_SIGN_DATA_SIZE)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((impl = sshkey_impl_from_key(key)) == NULL)
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	return impl->funcs->verify(key, sig, siglen, data, dlen,
 	    alg, compat, detailsp);
 }
 
 /* Convert a plain key to their _CERT equivalent */
 int
 sshkey_to_certified(struct sshkey *k)
 {
 	int newtype;
 
 	if ((newtype = sshkey_type_certified(k->type)) == -1)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((k->cert = cert_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	k->type = newtype;
 	return 0;
 }
 
 /* Convert a certificate to its raw key equivalent */
 int
 sshkey_drop_cert(struct sshkey *k)
 {
 	if (!sshkey_type_is_cert(k->type))
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	cert_free(k->cert);
 	k->cert = NULL;
 	k->type = sshkey_type_plain(k->type);
 	return 0;
 }
 
 /* Sign a certified key, (re-)generating the signed certblob. */
 int
 sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
     const char *sk_provider, const char *sk_pin,
     sshkey_certify_signer *signer, void *signer_ctx)
 {
 	const struct sshkey_impl *impl;
 	struct sshbuf *principals = NULL;
 	u_char *ca_blob = NULL, *sig_blob = NULL, nonce[32];
 	size_t i, ca_len, sig_len;
 	int ret = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *cert = NULL;
 	char *sigtype = NULL;
 
 	if (k == NULL || k->cert == NULL ||
 	    k->cert->certblob == NULL || ca == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (!sshkey_is_cert(k))
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	if (!sshkey_type_is_valid_ca(ca->type))
 		return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
 	if ((impl = sshkey_impl_from_key(k)) == NULL)
 		return SSH_ERR_INTERNAL_ERROR;
 
 	/*
 	 * If no alg specified as argument but a signature_type was set,
 	 * then prefer that. If both were specified, then they must match.
 	 */
 	if (alg == NULL)
 		alg = k->cert->signature_type;
 	else if (k->cert->signature_type != NULL &&
 	    strcmp(alg, k->cert->signature_type) != 0)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	/*
 	 * If no signing algorithm or signature_type was specified and we're
 	 * using a RSA key, then default to a good signature algorithm.
 	 */
 	if (alg == NULL && ca->type == KEY_RSA)
 		alg = "rsa-sha2-512";
 
 	if ((ret = sshkey_to_blob(ca, &ca_blob, &ca_len)) != 0)
 		return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
 
 	cert = k->cert->certblob; /* for readability */
 	sshbuf_reset(cert);
 	if ((ret = sshbuf_put_cstring(cert, sshkey_ssh_name(k))) != 0)
 		goto out;
 
 	/* -v01 certs put nonce first */
 	arc4random_buf(&nonce, sizeof(nonce));
 	if ((ret = sshbuf_put_string(cert, nonce, sizeof(nonce))) != 0)
 		goto out;
 
 	/* Public key next */
 	if ((ret = impl->funcs->serialize_public(k, cert,
 	    SSHKEY_SERIALIZE_DEFAULT)) != 0)
 		goto out;
 
 	/* Then remaining cert fields */
 	if ((ret = sshbuf_put_u64(cert, k->cert->serial)) != 0 ||
 	    (ret = sshbuf_put_u32(cert, k->cert->type)) != 0 ||
 	    (ret = sshbuf_put_cstring(cert, k->cert->key_id)) != 0)
 		goto out;
 
 	if ((principals = sshbuf_new()) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	for (i = 0; i < k->cert->nprincipals; i++) {
 		if ((ret = sshbuf_put_cstring(principals,
 		    k->cert->principals[i])) != 0)
 			goto out;
 	}
 	if ((ret = sshbuf_put_stringb(cert, principals)) != 0 ||
 	    (ret = sshbuf_put_u64(cert, k->cert->valid_after)) != 0 ||
 	    (ret = sshbuf_put_u64(cert, k->cert->valid_before)) != 0 ||
 	    (ret = sshbuf_put_stringb(cert, k->cert->critical)) != 0 ||
 	    (ret = sshbuf_put_stringb(cert, k->cert->extensions)) != 0 ||
 	    (ret = sshbuf_put_string(cert, NULL, 0)) != 0 || /* Reserved */
 	    (ret = sshbuf_put_string(cert, ca_blob, ca_len)) != 0)
 		goto out;
 
 	/* Sign the whole mess */
 	if ((ret = signer(ca, &sig_blob, &sig_len, sshbuf_ptr(cert),
 	    sshbuf_len(cert), alg, sk_provider, sk_pin, 0, signer_ctx)) != 0)
 		goto out;
 	/* Check and update signature_type against what was actually used */
 	if ((ret = sshkey_get_sigtype(sig_blob, sig_len, &sigtype)) != 0)
 		goto out;
 	if (alg != NULL && strcmp(alg, sigtype) != 0) {
 		ret = SSH_ERR_SIGN_ALG_UNSUPPORTED;
 		goto out;
 	}
 	if (k->cert->signature_type == NULL) {
 		k->cert->signature_type = sigtype;
 		sigtype = NULL;
 	}
 	/* Append signature and we are done */
 	if ((ret = sshbuf_put_string(cert, sig_blob, sig_len)) != 0)
 		goto out;
 	ret = 0;
  out:
 	if (ret != 0)
 		sshbuf_reset(cert);
 	free(sig_blob);
 	free(ca_blob);
 	free(sigtype);
 	sshbuf_free(principals);
 	return ret;
 }
 
 static int
 default_key_sign(struct sshkey *key, u_char **sigp, size_t *lenp,
     const u_char *data, size_t datalen,
     const char *alg, const char *sk_provider, const char *sk_pin,
     u_int compat, void *ctx)
 {
 	if (ctx != NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	return sshkey_sign(key, sigp, lenp, data, datalen, alg,
 	    sk_provider, sk_pin, compat);
 }
 
 int
 sshkey_certify(struct sshkey *k, struct sshkey *ca, const char *alg,
     const char *sk_provider, const char *sk_pin)
 {
 	return sshkey_certify_custom(k, ca, alg, sk_provider, sk_pin,
 	    default_key_sign, NULL);
 }
 
 int
 sshkey_cert_check_authority(const struct sshkey *k,
     int want_host, int require_principal, int wildcard_pattern,
     uint64_t verify_time, const char *name, const char **reason)
 {
 	u_int i, principal_matches;
 
 	if (reason == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (!sshkey_is_cert(k)) {
 		*reason = "Key is not a certificate";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	if (want_host) {
 		if (k->cert->type != SSH2_CERT_TYPE_HOST) {
 			*reason = "Certificate invalid: not a host certificate";
 			return SSH_ERR_KEY_CERT_INVALID;
 		}
 	} else {
 		if (k->cert->type != SSH2_CERT_TYPE_USER) {
 			*reason = "Certificate invalid: not a user certificate";
 			return SSH_ERR_KEY_CERT_INVALID;
 		}
 	}
 	if (verify_time < k->cert->valid_after) {
 		*reason = "Certificate invalid: not yet valid";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	if (verify_time >= k->cert->valid_before) {
 		*reason = "Certificate invalid: expired";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	if (k->cert->nprincipals == 0) {
 		if (require_principal) {
 			*reason = "Certificate lacks principal list";
 			return SSH_ERR_KEY_CERT_INVALID;
 		}
 	} else if (name != NULL) {
 		principal_matches = 0;
 		for (i = 0; i < k->cert->nprincipals; i++) {
 			if (wildcard_pattern) {
 				if (match_pattern(k->cert->principals[i],
 				    name)) {
 					principal_matches = 1;
 					break;
 				}
 			} else if (strcmp(name, k->cert->principals[i]) == 0) {
 				principal_matches = 1;
 				break;
 			}
 		}
 		if (!principal_matches) {
 			*reason = "Certificate invalid: name is not a listed "
 			    "principal";
 			return SSH_ERR_KEY_CERT_INVALID;
 		}
 	}
 	return 0;
 }
 
 int
 sshkey_cert_check_authority_now(const struct sshkey *k,
     int want_host, int require_principal, int wildcard_pattern,
     const char *name, const char **reason)
 {
 	time_t now;
 
 	if ((now = time(NULL)) < 0) {
 		/* yikes - system clock before epoch! */
 		*reason = "Certificate invalid: not yet valid";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	return sshkey_cert_check_authority(k, want_host, require_principal,
 	    wildcard_pattern, (uint64_t)now, name, reason);
 }
 
 int
 sshkey_cert_check_host(const struct sshkey *key, const char *host,
     int wildcard_principals, const char *ca_sign_algorithms,
     const char **reason)
 {
 	int r;
 
 	if ((r = sshkey_cert_check_authority_now(key, 1, 0, wildcard_principals,
 	    host, reason)) != 0)
 		return r;
 	if (sshbuf_len(key->cert->critical) != 0) {
 		*reason = "Certificate contains unsupported critical options";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	if (ca_sign_algorithms != NULL &&
 	    (r = sshkey_check_cert_sigtype(key, ca_sign_algorithms)) != 0) {
 		*reason = "Certificate signed with disallowed algorithm";
 		return SSH_ERR_KEY_CERT_INVALID;
 	}
 	return 0;
 }
 
 size_t
 sshkey_format_cert_validity(const struct sshkey_cert *cert, char *s, size_t l)
 {
 	char from[32], to[32], ret[128];
 
 	*from = *to = '\0';
 	if (cert->valid_after == 0 &&
 	    cert->valid_before == 0xffffffffffffffffULL)
 		return strlcpy(s, "forever", l);
 
 	if (cert->valid_after != 0)
 		format_absolute_time(cert->valid_after, from, sizeof(from));
 	if (cert->valid_before != 0xffffffffffffffffULL)
 		format_absolute_time(cert->valid_before, to, sizeof(to));
 
 	if (cert->valid_after == 0)
 		snprintf(ret, sizeof(ret), "before %s", to);
 	else if (cert->valid_before == 0xffffffffffffffffULL)
 		snprintf(ret, sizeof(ret), "after %s", from);
 	else
 		snprintf(ret, sizeof(ret), "from %s to %s", from, to);
 
 	return strlcpy(s, ret, l);
 }
 
 /* Common serialization for FIDO private keys */
 int
 sshkey_serialize_private_sk(const struct sshkey *key, struct sshbuf *b)
 {
 	int r;
 
 	if ((r = sshbuf_put_cstring(b, key->sk_application)) != 0 ||
 	    (r = sshbuf_put_u8(b, key->sk_flags)) != 0 ||
 	    (r = sshbuf_put_stringb(b, key->sk_key_handle)) != 0 ||
 	    (r = sshbuf_put_stringb(b, key->sk_reserved)) != 0)
 		return r;
 
 	return 0;
 }
 
 int
 sshkey_private_serialize_opt(struct sshkey *key, struct sshbuf *buf,
     enum sshkey_serialize_rep opts)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	int was_shielded = sshkey_is_shielded(key);
 	struct sshbuf *b = NULL;
 	const struct sshkey_impl *impl;
 
 	if ((impl = sshkey_impl_from_key(key)) == NULL)
 		return SSH_ERR_INTERNAL_ERROR;
 	if ((r = sshkey_unshield_private(key)) != 0)
 		return r;
 	if ((b = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshbuf_put_cstring(b, sshkey_ssh_name(key))) != 0)
 		goto out;
 	if (sshkey_is_cert(key)) {
 		if (key->cert == NULL ||
 		    sshbuf_len(key->cert->certblob) == 0) {
 			r = SSH_ERR_INVALID_ARGUMENT;
 			goto out;
 		}
 		if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0)
 			goto out;
 	}
 	if ((r = impl->funcs->serialize_private(key, b, opts)) != 0)
 		goto out;
 
 	/*
 	 * success (but we still need to append the output to buf after
 	 * possibly re-shielding the private key)
 	 */
 	r = 0;
  out:
 	if (was_shielded)
 		r = sshkey_shield_private(key);
 	if (r == 0)
 		r = sshbuf_putb(buf, b);
 	sshbuf_free(b);
 
 	return r;
 }
 
 int
 sshkey_private_serialize(struct sshkey *key, struct sshbuf *b)
 {
 	return sshkey_private_serialize_opt(key, b,
 	    SSHKEY_SERIALIZE_DEFAULT);
 }
 
 /* Shared deserialization of FIDO private key components */
 int
 sshkey_private_deserialize_sk(struct sshbuf *buf, struct sshkey *k)
 {
 	int r;
 
 	if ((k->sk_key_handle = sshbuf_new()) == NULL ||
 	    (k->sk_reserved = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshbuf_get_cstring(buf, &k->sk_application, NULL)) != 0 ||
 	    (r = sshbuf_get_u8(buf, &k->sk_flags)) != 0 ||
 	    (r = sshbuf_get_stringb(buf, k->sk_key_handle)) != 0 ||
 	    (r = sshbuf_get_stringb(buf, k->sk_reserved)) != 0)
 		return r;
 
 	return 0;
 }
 
 int
 sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
 {
 	const struct sshkey_impl *impl;
 	char *tname = NULL;
 	char *expect_sk_application = NULL;
 	u_char *expect_ed25519_pk = NULL;
 	struct sshkey *k = NULL;
 	int type, r = SSH_ERR_INTERNAL_ERROR;
 
 	if (kp != NULL)
 		*kp = NULL;
 	if ((r = sshbuf_get_cstring(buf, &tname, NULL)) != 0)
 		goto out;
 	type = sshkey_type_from_name(tname);
 	if (sshkey_type_is_cert(type)) {
 		/*
 		 * Certificate key private keys begin with the certificate
 		 * itself. Make sure this matches the type of the enclosing
 		 * private key.
 		 */
 		if ((r = sshkey_froms(buf, &k)) != 0)
 			goto out;
 		if (k->type != type) {
 			r = SSH_ERR_KEY_CERT_MISMATCH;
 			goto out;
 		}
 		/* For ECDSA keys, the group must match too */
 		if (k->type == KEY_ECDSA &&
 		    k->ecdsa_nid != sshkey_ecdsa_nid_from_name(tname)) {
 			r = SSH_ERR_KEY_CERT_MISMATCH;
 			goto out;
 		}
 		/*
 		 * Several fields are redundant between certificate and
 		 * private key body, we require these to match.
 		 */
 		expect_sk_application = k->sk_application;
 		expect_ed25519_pk = k->ed25519_pk;
 		k->sk_application = NULL;
 		k->ed25519_pk = NULL;
 		/* XXX xmss too or refactor */
 	} else {
 		if ((k = sshkey_new(type)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 	}
 	if ((impl = sshkey_impl_from_type(type)) == NULL) {
 		r = SSH_ERR_INTERNAL_ERROR;
 		goto out;
 	}
 	if ((r = impl->funcs->deserialize_private(tname, buf, k)) != 0)
 		goto out;
 
 	/* XXX xmss too or refactor */
 	if ((expect_sk_application != NULL && (k->sk_application == NULL ||
 	    strcmp(expect_sk_application, k->sk_application) != 0)) ||
 	    (expect_ed25519_pk != NULL && (k->ed25519_pk == NULL ||
 	    memcmp(expect_ed25519_pk, k->ed25519_pk, ED25519_PK_SZ) != 0))) {
 		r = SSH_ERR_KEY_CERT_MISMATCH;
 		goto out;
 	}
 	/* success */
 	r = 0;
 	if (kp != NULL) {
 		*kp = k;
 		k = NULL;
 	}
  out:
 	free(tname);
 	sshkey_free(k);
 	free(expect_sk_application);
 	free(expect_ed25519_pk);
 	return r;
 }
 
 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
 int
 sshkey_ec_validate_public(const EC_GROUP *group, const EC_POINT *public)
 {
 	EC_POINT *nq = NULL;
 	BIGNUM *order = NULL, *x = NULL, *y = NULL, *tmp = NULL;
 	int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
 
 	/*
 	 * NB. This assumes OpenSSL has already verified that the public
 	 * point lies on the curve. This is done by EC_POINT_oct2point()
 	 * implicitly calling EC_POINT_is_on_curve(). If this code is ever
 	 * reachable with public points not unmarshalled using
 	 * EC_POINT_oct2point then the caller will need to explicitly check.
 	 */
 
 	/*
 	 * We shouldn't ever hit this case because bignum_get_ecpoint()
 	 * refuses to load GF2m points.
 	 */
 	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
 	    NID_X9_62_prime_field)
 		goto out;
 
 	/* Q != infinity */
 	if (EC_POINT_is_at_infinity(group, public))
 		goto out;
 
 	if ((x = BN_new()) == NULL ||
 	    (y = BN_new()) == NULL ||
 	    (order = BN_new()) == NULL ||
 	    (tmp = BN_new()) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */
 	if (EC_GROUP_get_order(group, order, NULL) != 1 ||
 	    EC_POINT_get_affine_coordinates_GFp(group, public,
 	    x, y, NULL) != 1) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (BN_num_bits(x) <= BN_num_bits(order) / 2 ||
 	    BN_num_bits(y) <= BN_num_bits(order) / 2)
 		goto out;
 
 	/* nQ == infinity (n == order of subgroup) */
 	if ((nq = EC_POINT_new(group)) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (EC_POINT_mul(group, nq, NULL, public, order, NULL) != 1) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (EC_POINT_is_at_infinity(group, nq) != 1)
 		goto out;
 
 	/* x < order - 1, y < order - 1 */
 	if (!BN_sub(tmp, order, BN_value_one())) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (BN_cmp(x, tmp) >= 0 || BN_cmp(y, tmp) >= 0)
 		goto out;
 	ret = 0;
  out:
 	BN_clear_free(x);
 	BN_clear_free(y);
 	BN_clear_free(order);
 	BN_clear_free(tmp);
 	EC_POINT_free(nq);
 	return ret;
 }
 
 int
 sshkey_ec_validate_private(const EC_KEY *key)
 {
 	BIGNUM *order = NULL, *tmp = NULL;
 	int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
 
 	if ((order = BN_new()) == NULL || (tmp = BN_new()) == NULL) {
 		ret = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/* log2(private) > log2(order)/2 */
 	if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, NULL) != 1) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (BN_num_bits(EC_KEY_get0_private_key(key)) <=
 	    BN_num_bits(order) / 2)
 		goto out;
 
 	/* private < order - 1 */
 	if (!BN_sub(tmp, order, BN_value_one())) {
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0)
 		goto out;
 	ret = 0;
  out:
 	BN_clear_free(order);
 	BN_clear_free(tmp);
 	return ret;
 }
 
 void
 sshkey_dump_ec_point(const EC_GROUP *group, const EC_POINT *point)
 {
 	BIGNUM *x = NULL, *y = NULL;
 
 	if (point == NULL) {
 		fputs("point=(NULL)\n", stderr);
 		return;
 	}
 	if ((x = BN_new()) == NULL || (y = BN_new()) == NULL) {
 		fprintf(stderr, "%s: BN_new failed\n", __func__);
 		goto out;
 	}
 	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
 	    NID_X9_62_prime_field) {
 		fprintf(stderr, "%s: group is not a prime field\n", __func__);
 		goto out;
 	}
 	if (EC_POINT_get_affine_coordinates_GFp(group, point,
 	    x, y, NULL) != 1) {
 		fprintf(stderr, "%s: EC_POINT_get_affine_coordinates_GFp\n",
 		    __func__);
 		goto out;
 	}
 	fputs("x=", stderr);
 	BN_print_fp(stderr, x);
 	fputs("\ny=", stderr);
 	BN_print_fp(stderr, y);
 	fputs("\n", stderr);
  out:
 	BN_clear_free(x);
 	BN_clear_free(y);
 }
 
 void
 sshkey_dump_ec_key(const EC_KEY *key)
 {
 	const BIGNUM *exponent;
 
 	sshkey_dump_ec_point(EC_KEY_get0_group(key),
 	    EC_KEY_get0_public_key(key));
 	fputs("exponent=", stderr);
 	if ((exponent = EC_KEY_get0_private_key(key)) == NULL)
 		fputs("(NULL)", stderr);
 	else
 		BN_print_fp(stderr, EC_KEY_get0_private_key(key));
 	fputs("\n", stderr);
 }
 #endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */
 
 static int
 sshkey_private_to_blob2(struct sshkey *prv, struct sshbuf *blob,
     const char *passphrase, const char *comment, const char *ciphername,
     int rounds)
 {
 	u_char *cp, *key = NULL, *pubkeyblob = NULL;
 	u_char salt[SALT_LEN];
 	size_t i, pubkeylen, keylen, ivlen, blocksize, authlen;
 	u_int check;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	struct sshcipher_ctx *ciphercontext = NULL;
 	const struct sshcipher *cipher;
 	const char *kdfname = KDFNAME;
 	struct sshbuf *encoded = NULL, *encrypted = NULL, *kdf = NULL;
 
 	if (rounds <= 0)
 		rounds = DEFAULT_ROUNDS;
 	if (passphrase == NULL || !strlen(passphrase)) {
 		ciphername = "none";
 		kdfname = "none";
 	} else if (ciphername == NULL)
 		ciphername = DEFAULT_CIPHERNAME;
 	if ((cipher = cipher_by_name(ciphername)) == NULL) {
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
 	}
 
 	if ((kdf = sshbuf_new()) == NULL ||
 	    (encoded = sshbuf_new()) == NULL ||
 	    (encrypted = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	blocksize = cipher_blocksize(cipher);
 	keylen = cipher_keylen(cipher);
 	ivlen = cipher_ivlen(cipher);
 	authlen = cipher_authlen(cipher);
 	if ((key = calloc(1, keylen + ivlen)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (strcmp(kdfname, "bcrypt") == 0) {
 		arc4random_buf(salt, SALT_LEN);
 		if (bcrypt_pbkdf(passphrase, strlen(passphrase),
 		    salt, SALT_LEN, key, keylen + ivlen, rounds) < 0) {
 			r = SSH_ERR_INVALID_ARGUMENT;
 			goto out;
 		}
 		if ((r = sshbuf_put_string(kdf, salt, SALT_LEN)) != 0 ||
 		    (r = sshbuf_put_u32(kdf, rounds)) != 0)
 			goto out;
 	} else if (strcmp(kdfname, "none") != 0) {
 		/* Unsupported KDF type */
 		r = SSH_ERR_KEY_UNKNOWN_CIPHER;
 		goto out;
 	}
 	if ((r = cipher_init(&ciphercontext, cipher, key, keylen,
 	    key + keylen, ivlen, 1)) != 0)
 		goto out;
 
 	if ((r = sshbuf_put(encoded, AUTH_MAGIC, sizeof(AUTH_MAGIC))) != 0 ||
 	    (r = sshbuf_put_cstring(encoded, ciphername)) != 0 ||
 	    (r = sshbuf_put_cstring(encoded, kdfname)) != 0 ||
 	    (r = sshbuf_put_stringb(encoded, kdf)) != 0 ||
 	    (r = sshbuf_put_u32(encoded, 1)) != 0 ||	/* number of keys */
 	    (r = sshkey_to_blob(prv, &pubkeyblob, &pubkeylen)) != 0 ||
 	    (r = sshbuf_put_string(encoded, pubkeyblob, pubkeylen)) != 0)
 		goto out;
 
 	/* set up the buffer that will be encrypted */
 
 	/* Random check bytes */
 	check = arc4random();
 	if ((r = sshbuf_put_u32(encrypted, check)) != 0 ||
 	    (r = sshbuf_put_u32(encrypted, check)) != 0)
 		goto out;
 
 	/* append private key and comment*/
 	if ((r = sshkey_private_serialize_opt(prv, encrypted,
 	    SSHKEY_SERIALIZE_FULL)) != 0 ||
 	    (r = sshbuf_put_cstring(encrypted, comment)) != 0)
 		goto out;
 
 	/* padding */
 	i = 0;
 	while (sshbuf_len(encrypted) % blocksize) {
 		if ((r = sshbuf_put_u8(encrypted, ++i & 0xff)) != 0)
 			goto out;
 	}
 
 	/* length in destination buffer */
 	if ((r = sshbuf_put_u32(encoded, sshbuf_len(encrypted))) != 0)
 		goto out;
 
 	/* encrypt */
 	if ((r = sshbuf_reserve(encoded,
 	    sshbuf_len(encrypted) + authlen, &cp)) != 0)
 		goto out;
 	if ((r = cipher_crypt(ciphercontext, 0, cp,
 	    sshbuf_ptr(encrypted), sshbuf_len(encrypted), 0, authlen)) != 0)
 		goto out;
 
 	sshbuf_reset(blob);
 
 	/* assemble uuencoded key */
 	if ((r = sshbuf_put(blob, MARK_BEGIN, MARK_BEGIN_LEN)) != 0 ||
 	    (r = sshbuf_dtob64(encoded, blob, 1)) != 0 ||
 	    (r = sshbuf_put(blob, MARK_END, MARK_END_LEN)) != 0)
 		goto out;
 
 	/* success */
 	r = 0;
 
  out:
 	sshbuf_free(kdf);
 	sshbuf_free(encoded);
 	sshbuf_free(encrypted);
 	cipher_free(ciphercontext);
 	explicit_bzero(salt, sizeof(salt));
 	if (key != NULL)
 		freezero(key, keylen + ivlen);
 	if (pubkeyblob != NULL)
 		freezero(pubkeyblob, pubkeylen);
 	return r;
 }
 
 static int
 private2_uudecode(struct sshbuf *blob, struct sshbuf **decodedp)
 {
 	const u_char *cp;
 	size_t encoded_len;
 	int r;
 	u_char last;
 	struct sshbuf *encoded = NULL, *decoded = NULL;
 
 	if (blob == NULL || decodedp == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	*decodedp = NULL;
 
 	if ((encoded = sshbuf_new()) == NULL ||
 	    (decoded = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/* check preamble */
 	cp = sshbuf_ptr(blob);
 	encoded_len = sshbuf_len(blob);
 	if (encoded_len < (MARK_BEGIN_LEN + MARK_END_LEN) ||
 	    memcmp(cp, MARK_BEGIN, MARK_BEGIN_LEN) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	cp += MARK_BEGIN_LEN;
 	encoded_len -= MARK_BEGIN_LEN;
 
 	/* Look for end marker, removing whitespace as we go */
 	while (encoded_len > 0) {
 		if (*cp != '\n' && *cp != '\r') {
 			if ((r = sshbuf_put_u8(encoded, *cp)) != 0)
 				goto out;
 		}
 		last = *cp;
 		encoded_len--;
 		cp++;
 		if (last == '\n') {
 			if (encoded_len >= MARK_END_LEN &&
 			    memcmp(cp, MARK_END, MARK_END_LEN) == 0) {
 				/* \0 terminate */
 				if ((r = sshbuf_put_u8(encoded, 0)) != 0)
 					goto out;
 				break;
 			}
 		}
 	}
 	if (encoded_len == 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* decode base64 */
 	if ((r = sshbuf_b64tod(decoded, (char *)sshbuf_ptr(encoded))) != 0)
 		goto out;
 
 	/* check magic */
 	if (sshbuf_len(decoded) < sizeof(AUTH_MAGIC) ||
 	    memcmp(sshbuf_ptr(decoded), AUTH_MAGIC, sizeof(AUTH_MAGIC))) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	/* success */
 	*decodedp = decoded;
 	decoded = NULL;
 	r = 0;
  out:
 	sshbuf_free(encoded);
 	sshbuf_free(decoded);
 	return r;
 }
 
 static int
 private2_decrypt(struct sshbuf *decoded, const char *passphrase,
     struct sshbuf **decryptedp, struct sshkey **pubkeyp)
 {
 	char *ciphername = NULL, *kdfname = NULL;
 	const struct sshcipher *cipher = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	size_t keylen = 0, ivlen = 0, authlen = 0, slen = 0;
 	struct sshbuf *kdf = NULL, *decrypted = NULL;
 	struct sshcipher_ctx *ciphercontext = NULL;
 	struct sshkey *pubkey = NULL;
 	u_char *key = NULL, *salt = NULL, *dp;
 	u_int blocksize, rounds, nkeys, encrypted_len, check1, check2;
 
 	if (decoded == NULL || decryptedp == NULL || pubkeyp == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 
 	*decryptedp = NULL;
 	*pubkeyp = NULL;
 
 	if ((decrypted = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	/* parse public portion of key */
 	if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 ||
 	    (r = sshbuf_get_cstring(decoded, &ciphername, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(decoded, &kdfname, NULL)) != 0 ||
 	    (r = sshbuf_froms(decoded, &kdf)) != 0 ||
 	    (r = sshbuf_get_u32(decoded, &nkeys)) != 0)
 		goto out;
 
 	if (nkeys != 1) {
 		/* XXX only one key supported at present */
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	if ((r = sshkey_froms(decoded, &pubkey)) != 0 ||
 	    (r = sshbuf_get_u32(decoded, &encrypted_len)) != 0)
 		goto out;
 
 	if ((cipher = cipher_by_name(ciphername)) == NULL) {
 		r = SSH_ERR_KEY_UNKNOWN_CIPHER;
 		goto out;
 	}
 	if (strcmp(kdfname, "none") != 0 && strcmp(kdfname, "bcrypt") != 0) {
 		r = SSH_ERR_KEY_UNKNOWN_CIPHER;
 		goto out;
 	}
 	if (strcmp(kdfname, "none") == 0 && strcmp(ciphername, "none") != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if ((passphrase == NULL || strlen(passphrase) == 0) &&
 	    strcmp(kdfname, "none") != 0) {
 		/* passphrase required */
 		r = SSH_ERR_KEY_WRONG_PASSPHRASE;
 		goto out;
 	}
 
 	/* check size of encrypted key blob */
 	blocksize = cipher_blocksize(cipher);
 	if (encrypted_len < blocksize || (encrypted_len % blocksize) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* setup key */
 	keylen = cipher_keylen(cipher);
 	ivlen = cipher_ivlen(cipher);
 	authlen = cipher_authlen(cipher);
 	if ((key = calloc(1, keylen + ivlen)) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (strcmp(kdfname, "bcrypt") == 0) {
 		if ((r = sshbuf_get_string(kdf, &salt, &slen)) != 0 ||
 		    (r = sshbuf_get_u32(kdf, &rounds)) != 0)
 			goto out;
 		if (bcrypt_pbkdf(passphrase, strlen(passphrase), salt, slen,
 		    key, keylen + ivlen, rounds) < 0) {
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 
 	/* check that an appropriate amount of auth data is present */
 	if (sshbuf_len(decoded) < authlen ||
 	    sshbuf_len(decoded) - authlen < encrypted_len) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* decrypt private portion of key */
 	if ((r = sshbuf_reserve(decrypted, encrypted_len, &dp)) != 0 ||
 	    (r = cipher_init(&ciphercontext, cipher, key, keylen,
 	    key + keylen, ivlen, 0)) != 0)
 		goto out;
 	if ((r = cipher_crypt(ciphercontext, 0, dp, sshbuf_ptr(decoded),
 	    encrypted_len, 0, authlen)) != 0) {
 		/* an integrity error here indicates an incorrect passphrase */
 		if (r == SSH_ERR_MAC_INVALID)
 			r = SSH_ERR_KEY_WRONG_PASSPHRASE;
 		goto out;
 	}
 	if ((r = sshbuf_consume(decoded, encrypted_len + authlen)) != 0)
 		goto out;
 	/* there should be no trailing data */
 	if (sshbuf_len(decoded) != 0) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* check check bytes */
 	if ((r = sshbuf_get_u32(decrypted, &check1)) != 0 ||
 	    (r = sshbuf_get_u32(decrypted, &check2)) != 0)
 		goto out;
 	if (check1 != check2) {
 		r = SSH_ERR_KEY_WRONG_PASSPHRASE;
 		goto out;
 	}
 	/* success */
 	*decryptedp = decrypted;
 	decrypted = NULL;
 	*pubkeyp = pubkey;
 	pubkey = NULL;
 	r = 0;
  out:
 	cipher_free(ciphercontext);
 	free(ciphername);
 	free(kdfname);
 	sshkey_free(pubkey);
 	if (salt != NULL) {
 		explicit_bzero(salt, slen);
 		free(salt);
 	}
 	if (key != NULL) {
 		explicit_bzero(key, keylen + ivlen);
 		free(key);
 	}
 	sshbuf_free(kdf);
 	sshbuf_free(decrypted);
 	return r;
 }
 
 static int
 sshkey_parse_private2(struct sshbuf *blob, int type, const char *passphrase,
     struct sshkey **keyp, char **commentp)
 {
 	char *comment = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *decoded = NULL, *decrypted = NULL;
 	struct sshkey *k = NULL, *pubkey = NULL;
 
 	if (keyp != NULL)
 		*keyp = NULL;
 	if (commentp != NULL)
 		*commentp = NULL;
 
 	/* Undo base64 encoding and decrypt the private section */
 	if ((r = private2_uudecode(blob, &decoded)) != 0 ||
 	    (r = private2_decrypt(decoded, passphrase,
 	    &decrypted, &pubkey)) != 0)
 		goto out;
 
 	if (type != KEY_UNSPEC &&
 	    sshkey_type_plain(type) != sshkey_type_plain(pubkey->type)) {
 		r = SSH_ERR_KEY_TYPE_MISMATCH;
 		goto out;
 	}
 
 	/* Load the private key and comment */
 	if ((r = sshkey_private_deserialize(decrypted, &k)) != 0 ||
 	    (r = sshbuf_get_cstring(decrypted, &comment, NULL)) != 0)
 		goto out;
 
 	/* Check deterministic padding after private section */
 	if ((r = private2_check_padding(decrypted)) != 0)
 		goto out;
 
 	/* Check that the public key in the envelope matches the private key */
 	if (!sshkey_equal(pubkey, k)) {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* success */
 	r = 0;
 	if (keyp != NULL) {
 		*keyp = k;
 		k = NULL;
 	}
 	if (commentp != NULL) {
 		*commentp = comment;
 		comment = NULL;
 	}
  out:
 	free(comment);
 	sshbuf_free(decoded);
 	sshbuf_free(decrypted);
 	sshkey_free(k);
 	sshkey_free(pubkey);
 	return r;
 }
 
 static int
 sshkey_parse_private2_pubkey(struct sshbuf *blob, int type,
     struct sshkey **keyp)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *decoded = NULL;
 	struct sshkey *pubkey = NULL;
 	u_int nkeys = 0;
 
 	if (keyp != NULL)
 		*keyp = NULL;
 
 	if ((r = private2_uudecode(blob, &decoded)) != 0)
 		goto out;
 	/* parse public key from unencrypted envelope */
 	if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 ||
 	    (r = sshbuf_skip_string(decoded)) != 0 || /* cipher */
 	    (r = sshbuf_skip_string(decoded)) != 0 || /* KDF alg */
 	    (r = sshbuf_skip_string(decoded)) != 0 || /* KDF hint */
 	    (r = sshbuf_get_u32(decoded, &nkeys)) != 0)
 		goto out;
 
 	if (nkeys != 1) {
 		/* XXX only one key supported at present */
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 
 	/* Parse the public key */
 	if ((r = sshkey_froms(decoded, &pubkey)) != 0)
 		goto out;
 
 	if (type != KEY_UNSPEC &&
 	    sshkey_type_plain(type) != sshkey_type_plain(pubkey->type)) {
 		r = SSH_ERR_KEY_TYPE_MISMATCH;
 		goto out;
 	}
 
 	/* success */
 	r = 0;
 	if (keyp != NULL) {
 		*keyp = pubkey;
 		pubkey = NULL;
 	}
  out:
 	sshbuf_free(decoded);
 	sshkey_free(pubkey);
 	return r;
 }
 
 #ifdef WITH_OPENSSL
 /* convert SSH v2 key to PEM or PKCS#8 format */
 static int
 sshkey_private_to_blob_pem_pkcs8(struct sshkey *key, struct sshbuf *buf,
     int format, const char *_passphrase, const char *comment)
 {
 	int was_shielded = sshkey_is_shielded(key);
 	int success, r;
 	int blen, len = strlen(_passphrase);
 	u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
 	const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL;
 	char *bptr;
 	BIO *bio = NULL;
 	struct sshbuf *blob;
 	EVP_PKEY *pkey = NULL;
 
 	if (len > 0 && len <= 4)
 		return SSH_ERR_PASSPHRASE_TOO_SHORT;
 	if ((blob = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((bio = BIO_new(BIO_s_mem())) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (format == SSHKEY_PRIVATE_PKCS8 && (pkey = EVP_PKEY_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = sshkey_unshield_private(key)) != 0)
 		goto out;
 
 	switch (key->type) {
+#ifdef WITH_DSA
 	case KEY_DSA:
 		if (format == SSHKEY_PRIVATE_PEM) {
 			success = PEM_write_bio_DSAPrivateKey(bio, key->dsa,
 			    cipher, passphrase, len, NULL, NULL);
 		} else {
 			success = EVP_PKEY_set1_DSA(pkey, key->dsa);
 		}
 		break;
+#endif
 #ifdef OPENSSL_HAS_ECC
 	case KEY_ECDSA:
 		if (format == SSHKEY_PRIVATE_PEM) {
 			success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa,
 			    cipher, passphrase, len, NULL, NULL);
 		} else {
 			success = EVP_PKEY_set1_EC_KEY(pkey, key->ecdsa);
 		}
 		break;
 #endif
 	case KEY_RSA:
 		if (format == SSHKEY_PRIVATE_PEM) {
 			success = PEM_write_bio_RSAPrivateKey(bio, key->rsa,
 			    cipher, passphrase, len, NULL, NULL);
 		} else {
 			success = EVP_PKEY_set1_RSA(pkey, key->rsa);
 		}
 		break;
 	default:
 		success = 0;
 		break;
 	}
 	if (success == 0) {
 		r = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}
 	if (format == SSHKEY_PRIVATE_PKCS8) {
 		if ((success = PEM_write_bio_PrivateKey(bio, pkey, cipher,
 		    passphrase, len, NULL, NULL)) == 0) {
 			r = SSH_ERR_LIBCRYPTO_ERROR;
 			goto out;
 		}
 	}
 	if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) {
 		r = SSH_ERR_INTERNAL_ERROR;
 		goto out;
 	}
 	if ((r = sshbuf_put(blob, bptr, blen)) != 0)
 		goto out;
 	r = 0;
  out:
 	if (was_shielded)
 		r = sshkey_shield_private(key);
 	if (r == 0)
 		r = sshbuf_putb(buf, blob);
 
 	EVP_PKEY_free(pkey);
 	sshbuf_free(blob);
 	BIO_free(bio);
 	return r;
 }
 #endif /* WITH_OPENSSL */
 
 /* Serialise "key" to buffer "blob" */
 int
 sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
     const char *passphrase, const char *comment,
     int format, const char *openssh_format_cipher, int openssh_format_rounds)
 {
 	switch (key->type) {
 #ifdef WITH_OPENSSL
 	case KEY_DSA:
 	case KEY_ECDSA:
 	case KEY_RSA:
 		break; /* see below */
 #endif /* WITH_OPENSSL */
 	case KEY_ED25519:
 	case KEY_ED25519_SK:
 #ifdef WITH_XMSS
 	case KEY_XMSS:
 #endif /* WITH_XMSS */
 #ifdef WITH_OPENSSL
 	case KEY_ECDSA_SK:
 #endif /* WITH_OPENSSL */
 		return sshkey_private_to_blob2(key, blob, passphrase,
 		    comment, openssh_format_cipher, openssh_format_rounds);
 	default:
 		return SSH_ERR_KEY_TYPE_UNKNOWN;
 	}
 
 #ifdef WITH_OPENSSL
 	switch (format) {
 	case SSHKEY_PRIVATE_OPENSSH:
 		return sshkey_private_to_blob2(key, blob, passphrase,
 		    comment, openssh_format_cipher, openssh_format_rounds);
 	case SSHKEY_PRIVATE_PEM:
 	case SSHKEY_PRIVATE_PKCS8:
 		return sshkey_private_to_blob_pem_pkcs8(key, blob,
 		    format, passphrase, comment);
 	default:
 		return SSH_ERR_INVALID_ARGUMENT;
 	}
 #endif /* WITH_OPENSSL */
 }
 
 #ifdef WITH_OPENSSL
 static int
 translate_libcrypto_error(unsigned long pem_err)
 {
 	int pem_reason = ERR_GET_REASON(pem_err);
 
 	switch (ERR_GET_LIB(pem_err)) {
 	case ERR_LIB_PEM:
 		switch (pem_reason) {
 		case PEM_R_BAD_PASSWORD_READ:
 #ifdef PEM_R_PROBLEMS_GETTING_PASSWORD
 		case PEM_R_PROBLEMS_GETTING_PASSWORD:
 #endif
 #ifdef PEM_R_BAD_DECRYPT
 		case PEM_R_BAD_DECRYPT:
 #endif
 			return SSH_ERR_KEY_WRONG_PASSPHRASE;
 		default:
 			return SSH_ERR_INVALID_FORMAT;
 		}
 	case ERR_LIB_EVP:
 		switch (pem_reason) {
 #ifdef EVP_R_BAD_DECRYPT
 		case EVP_R_BAD_DECRYPT:
 			return SSH_ERR_KEY_WRONG_PASSPHRASE;
 #endif
 #ifdef EVP_R_BN_DECODE_ERROR
 		case EVP_R_BN_DECODE_ERROR:
 #endif
 		case EVP_R_DECODE_ERROR:
 #ifdef EVP_R_PRIVATE_KEY_DECODE_ERROR
 		case EVP_R_PRIVATE_KEY_DECODE_ERROR:
 #endif
 			return SSH_ERR_INVALID_FORMAT;
 		default:
 			return SSH_ERR_LIBCRYPTO_ERROR;
 		}
 	case ERR_LIB_ASN1:
 		return SSH_ERR_INVALID_FORMAT;
 	}
 	return SSH_ERR_LIBCRYPTO_ERROR;
 }
 
 static void
 clear_libcrypto_errors(void)
 {
 	while (ERR_get_error() != 0)
 		;
 }
 
 /*
  * Translate OpenSSL error codes to determine whether
  * passphrase is required/incorrect.
  */
 static int
 convert_libcrypto_error(void)
 {
 	/*
 	 * Some password errors are reported at the beginning
 	 * of the error queue.
 	 */
 	if (translate_libcrypto_error(ERR_peek_error()) ==
 	    SSH_ERR_KEY_WRONG_PASSPHRASE)
 		return SSH_ERR_KEY_WRONG_PASSPHRASE;
 	return translate_libcrypto_error(ERR_peek_last_error());
 }
 
 static int
 pem_passphrase_cb(char *buf, int size, int rwflag, void *u)
 {
 	char *p = (char *)u;
 	size_t len;
 
 	if (p == NULL || (len = strlen(p)) == 0)
 		return -1;
 	if (size < 0 || len > (size_t)size)
 		return -1;
 	memcpy(buf, p, len);
 	return (int)len;
 }
 
 static int
 sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
     const char *passphrase, struct sshkey **keyp)
 {
 	EVP_PKEY *pk = NULL;
 	struct sshkey *prv = NULL;
 	BIO *bio = NULL;
 	int r;
 
 	if (keyp != NULL)
 		*keyp = NULL;
 
 	if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX)
 		return SSH_ERR_ALLOC_FAIL;
 	if (BIO_write(bio, sshbuf_ptr(blob), sshbuf_len(blob)) !=
 	    (int)sshbuf_len(blob)) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	clear_libcrypto_errors();
 	if ((pk = PEM_read_bio_PrivateKey(bio, NULL, pem_passphrase_cb,
 	    (char *)passphrase)) == NULL) {
 		/*
 		 * libcrypto may return various ASN.1 errors when attempting
 		 * to parse a key with an incorrect passphrase.
 		 * Treat all format errors as "incorrect passphrase" if a
 		 * passphrase was supplied.
 		 */
 		if (passphrase != NULL && *passphrase != '\0')
 			r = SSH_ERR_KEY_WRONG_PASSPHRASE;
 		else
 			r = convert_libcrypto_error();
 		goto out;
 	}
 	if (EVP_PKEY_base_id(pk) == EVP_PKEY_RSA &&
 	    (type == KEY_UNSPEC || type == KEY_RSA)) {
 		if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		prv->rsa = EVP_PKEY_get1_RSA(pk);
 		prv->type = KEY_RSA;
 #ifdef DEBUG_PK
 		RSA_print_fp(stderr, prv->rsa, 8);
 #endif
 		if (RSA_blinding_on(prv->rsa, NULL) != 1) {
 			r = SSH_ERR_LIBCRYPTO_ERROR;
 			goto out;
 		}
 		if ((r = sshkey_check_rsa_length(prv, 0)) != 0)
 			goto out;
+#ifdef WITH_DSA
 	} else if (EVP_PKEY_base_id(pk) == EVP_PKEY_DSA &&
 	    (type == KEY_UNSPEC || type == KEY_DSA)) {
 		if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		prv->dsa = EVP_PKEY_get1_DSA(pk);
 		prv->type = KEY_DSA;
 #ifdef DEBUG_PK
 		DSA_print_fp(stderr, prv->dsa, 8);
 #endif
+#endif
 #ifdef OPENSSL_HAS_ECC
 	} else if (EVP_PKEY_base_id(pk) == EVP_PKEY_EC &&
 	    (type == KEY_UNSPEC || type == KEY_ECDSA)) {
 		if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk);
 		prv->type = KEY_ECDSA;
 		prv->ecdsa_nid = sshkey_ecdsa_key_to_nid(prv->ecdsa);
 		if (prv->ecdsa_nid == -1 ||
 		    sshkey_curve_nid_to_name(prv->ecdsa_nid) == NULL ||
 		    sshkey_ec_validate_public(EC_KEY_get0_group(prv->ecdsa),
 		    EC_KEY_get0_public_key(prv->ecdsa)) != 0 ||
 		    sshkey_ec_validate_private(prv->ecdsa) != 0) {
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 # ifdef DEBUG_PK
 		if (prv != NULL && prv->ecdsa != NULL)
 			sshkey_dump_ec_key(prv->ecdsa);
 # endif
 #endif /* OPENSSL_HAS_ECC */
 #ifdef OPENSSL_HAS_ED25519
 	} else if (EVP_PKEY_base_id(pk) == EVP_PKEY_ED25519 &&
 	    (type == KEY_UNSPEC || type == KEY_ED25519)) {
 		size_t len;
 
 		if ((prv = sshkey_new(KEY_UNSPEC)) == NULL ||
 		    (prv->ed25519_sk = calloc(1, ED25519_SK_SZ)) == NULL ||
 		    (prv->ed25519_pk = calloc(1, ED25519_PK_SZ)) == NULL) {
 			r = SSH_ERR_ALLOC_FAIL;
 			goto out;
 		}
 		prv->type = KEY_ED25519;
 		len = ED25519_PK_SZ;
 		if (!EVP_PKEY_get_raw_public_key(pk, prv->ed25519_pk, &len)) {
 			r = SSH_ERR_LIBCRYPTO_ERROR;
 			goto out;
 		}
 		if (len != ED25519_PK_SZ) {
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		len = ED25519_SK_SZ - ED25519_PK_SZ;
 		if (!EVP_PKEY_get_raw_private_key(pk, prv->ed25519_sk, &len)) {
 			r = SSH_ERR_LIBCRYPTO_ERROR;
 			goto out;
 		}
 		if (len != ED25519_SK_SZ - ED25519_PK_SZ) {
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		/* Append the public key to our private key */
 		memcpy(prv->ed25519_sk + (ED25519_SK_SZ - ED25519_PK_SZ),
 		    prv->ed25519_pk, ED25519_PK_SZ);
 # ifdef DEBUG_PK
 		sshbuf_dump_data(prv->ed25519_sk, ED25519_SK_SZ, stderr);
 # endif
 #endif /* OPENSSL_HAS_ED25519 */
 	} else {
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	r = 0;
 	if (keyp != NULL) {
 		*keyp = prv;
 		prv = NULL;
 	}
  out:
 	BIO_free(bio);
 	EVP_PKEY_free(pk);
 	sshkey_free(prv);
 	return r;
 }
 #endif /* WITH_OPENSSL */
 
 int
 sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
     const char *passphrase, struct sshkey **keyp, char **commentp)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (keyp != NULL)
 		*keyp = NULL;
 	if (commentp != NULL)
 		*commentp = NULL;
 
 	switch (type) {
 	case KEY_XMSS:
 		/* No fallback for new-format-only keys */
 		return sshkey_parse_private2(blob, type, passphrase,
 		    keyp, commentp);
 	default:
 		r = sshkey_parse_private2(blob, type, passphrase, keyp,
 		    commentp);
 		/* Only fallback to PEM parser if a format error occurred. */
 		if (r != SSH_ERR_INVALID_FORMAT)
 			return r;
 #ifdef WITH_OPENSSL
 		return sshkey_parse_private_pem_fileblob(blob, type,
 		    passphrase, keyp);
 #else
 		return SSH_ERR_INVALID_FORMAT;
 #endif /* WITH_OPENSSL */
 	}
 }
 
 int
 sshkey_parse_private_fileblob(struct sshbuf *buffer, const char *passphrase,
     struct sshkey **keyp, char **commentp)
 {
 	if (keyp != NULL)
 		*keyp = NULL;
 	if (commentp != NULL)
 		*commentp = NULL;
 
 	return sshkey_parse_private_fileblob_type(buffer, KEY_UNSPEC,
 	    passphrase, keyp, commentp);
 }
 
 void
 sshkey_sig_details_free(struct sshkey_sig_details *details)
 {
 	freezero(details, sizeof(*details));
 }
 
 int
 sshkey_parse_pubkey_from_private_fileblob_type(struct sshbuf *blob, int type,
     struct sshkey **pubkeyp)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (pubkeyp != NULL)
 		*pubkeyp = NULL;
 	/* only new-format private keys bundle a public key inside */
 	if ((r = sshkey_parse_private2_pubkey(blob, type, pubkeyp)) != 0)
 		return r;
 	return 0;
 }
 
 #ifdef WITH_XMSS
 /*
  * serialize the key with the current state and forward the state
  * maxsign times.
  */
 int
 sshkey_private_serialize_maxsign(struct sshkey *k, struct sshbuf *b,
     u_int32_t maxsign, int printerror)
 {
 	int r, rupdate;
 
 	if (maxsign == 0 ||
 	    sshkey_type_plain(k->type) != KEY_XMSS)
 		return sshkey_private_serialize_opt(k, b,
 		    SSHKEY_SERIALIZE_DEFAULT);
 	if ((r = sshkey_xmss_get_state(k, printerror)) != 0 ||
 	    (r = sshkey_private_serialize_opt(k, b,
 	    SSHKEY_SERIALIZE_STATE)) != 0 ||
 	    (r = sshkey_xmss_forward_state(k, maxsign)) != 0)
 		goto out;
 	r = 0;
 out:
 	if ((rupdate = sshkey_xmss_update_state(k, printerror)) != 0) {
 		if (r == 0)
 			r = rupdate;
 	}
 	return r;
 }
 
 u_int32_t
 sshkey_signatures_left(const struct sshkey *k)
 {
 	if (sshkey_type_plain(k->type) == KEY_XMSS)
 		return sshkey_xmss_signatures_left(k);
 	return 0;
 }
 
 int
 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
 {
 	if (sshkey_type_plain(k->type) != KEY_XMSS)
 		return SSH_ERR_INVALID_ARGUMENT;
 	return sshkey_xmss_enable_maxsign(k, maxsign);
 }
 
 int
 sshkey_set_filename(struct sshkey *k, const char *filename)
 {
 	if (k == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if (sshkey_type_plain(k->type) != KEY_XMSS)
 		return 0;
 	if (filename == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	if ((k->xmss_filename = strdup(filename)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	return 0;
 }
 #else
 int
 sshkey_private_serialize_maxsign(struct sshkey *k, struct sshbuf *b,
     u_int32_t maxsign, int printerror)
 {
 	return sshkey_private_serialize_opt(k, b, SSHKEY_SERIALIZE_DEFAULT);
 }
 
 u_int32_t
 sshkey_signatures_left(const struct sshkey *k)
 {
 	return 0;
 }
 
 int
 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
 {
 	return SSH_ERR_INVALID_ARGUMENT;
 }
 
 int
 sshkey_set_filename(struct sshkey *k, const char *filename)
 {
 	if (k == NULL)
 		return SSH_ERR_INVALID_ARGUMENT;
 	return 0;
 }
 #endif /* WITH_XMSS */
diff --git a/sshsig.c b/sshsig.c
index d50d65fe203c..470b286a3a98 100644
--- a/sshsig.c
+++ b/sshsig.c
@@ -1,1157 +1,1157 @@
-/* $OpenBSD: sshsig.c,v 1.34 2023/12/08 09:18:39 markus Exp $ */
+/* $OpenBSD: sshsig.c,v 1.35 2024/03/08 22:16:32 djm Exp $ */
 /*
  * Copyright (c) 2019 Google LLC
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include "includes.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <errno.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "authfd.h"
 #include "authfile.h"
 #include "log.h"
 #include "misc.h"
 #include "sshbuf.h"
 #include "sshsig.h"
 #include "ssherr.h"
 #include "sshkey.h"
 #include "match.h"
 #include "digest.h"
 
 #define SIG_VERSION		0x01
 #define MAGIC_PREAMBLE		"SSHSIG"
 #define MAGIC_PREAMBLE_LEN	(sizeof(MAGIC_PREAMBLE) - 1)
 #define BEGIN_SIGNATURE		"-----BEGIN SSH SIGNATURE-----"
 #define END_SIGNATURE		"-----END SSH SIGNATURE-----"
 #define RSA_SIGN_ALG		"rsa-sha2-512" /* XXX maybe make configurable */
 #define RSA_SIGN_ALLOWED	"rsa-sha2-512,rsa-sha2-256"
 #define HASHALG_DEFAULT		"sha512" /* XXX maybe make configurable */
 #define HASHALG_ALLOWED		"sha256,sha512"
 
 int
 sshsig_armor(const struct sshbuf *blob, struct sshbuf **out)
 {
 	struct sshbuf *buf = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	*out = NULL;
 
 	if ((buf = sshbuf_new()) == NULL) {
 		error_f("sshbuf_new failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	if ((r = sshbuf_putf(buf, "%s\n", BEGIN_SIGNATURE)) != 0) {
 		error_fr(r, "sshbuf_putf");
 		goto out;
 	}
 
 	if ((r = sshbuf_dtob64(blob, buf, 1)) != 0) {
 		error_fr(r, "base64 encode signature");
 		goto out;
 	}
 
 	if ((r = sshbuf_put(buf, END_SIGNATURE,
 	    sizeof(END_SIGNATURE)-1)) != 0 ||
 	    (r = sshbuf_put_u8(buf, '\n')) != 0) {
 		error_fr(r, "sshbuf_put");
 		goto out;
 	}
 	/* success */
 	*out = buf;
 	buf = NULL; /* transferred */
 	r = 0;
  out:
 	sshbuf_free(buf);
 	return r;
 }
 
 int
 sshsig_dearmor(struct sshbuf *sig, struct sshbuf **out)
 {
 	int r;
 	size_t eoffset = 0;
 	struct sshbuf *buf = NULL;
 	struct sshbuf *sbuf = NULL;
 	char *b64 = NULL;
 
 	if ((sbuf = sshbuf_fromb(sig)) == NULL) {
 		error_f("sshbuf_fromb failed");
 		return SSH_ERR_ALLOC_FAIL;
 	}
 
 	/* Expect and consume preamble + lf/crlf */
 	if ((r = sshbuf_cmp(sbuf, 0,
 	    BEGIN_SIGNATURE, sizeof(BEGIN_SIGNATURE)-1)) != 0) {
 		error("Couldn't parse signature: missing header");
 		goto done;
 	}
 	if ((r = sshbuf_consume(sbuf, sizeof(BEGIN_SIGNATURE)-1)) != 0) {
 		error_fr(r, "consume");
 		goto done;
 	}
 	if ((r = sshbuf_cmp(sbuf, 0, "\r\n", 2)) == 0)
 		eoffset = 2;
 	else if ((r = sshbuf_cmp(sbuf, 0, "\n", 1)) == 0)
 		eoffset = 1;
 	else {
 		r = SSH_ERR_INVALID_FORMAT;
 		error_f("no header eol");
 		goto done;
 	}
 	if ((r = sshbuf_consume(sbuf, eoffset)) != 0) {
 		error_fr(r, "consume eol");
 		goto done;
 	}
 	/* Find and consume lf + suffix (any prior cr would be ignored) */
 	if ((r = sshbuf_find(sbuf, 0, "\n" END_SIGNATURE,
 	    sizeof(END_SIGNATURE), &eoffset)) != 0) {
 		error("Couldn't parse signature: missing footer");
 		goto done;
 	}
 	if ((r = sshbuf_consume_end(sbuf, sshbuf_len(sbuf)-eoffset)) != 0) {
 		error_fr(r, "consume");
 		goto done;
 	}
 
 	if ((b64 = sshbuf_dup_string(sbuf)) == NULL) {
 		error_f("sshbuf_dup_string failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto done;
 	}
 
 	if ((buf = sshbuf_new()) == NULL) {
 		error_f("sshbuf_new() failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto done;
 	}
 
 	if ((r = sshbuf_b64tod(buf, b64)) != 0) {
 		error_fr(r, "decode base64");
 		goto done;
 	}
 
 	/* success */
 	*out = buf;
 	r = 0;
 	buf = NULL; /* transferred */
 done:
 	sshbuf_free(buf);
 	sshbuf_free(sbuf);
 	free(b64);
 	return r;
 }
 
 static int
 sshsig_wrap_sign(struct sshkey *key, const char *hashalg,
     const char *sk_provider, const char *sk_pin, const struct sshbuf *h_message,
     const char *sig_namespace, struct sshbuf **out,
     sshsig_signer *signer, void *signer_ctx)
 {
 	int r;
 	size_t slen = 0;
 	u_char *sig = NULL;
 	struct sshbuf *blob = NULL;
 	struct sshbuf *tosign = NULL;
 	const char *sign_alg = NULL;
 
 	if ((tosign = sshbuf_new()) == NULL ||
 	    (blob = sshbuf_new()) == NULL) {
 		error_f("sshbuf_new failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto done;
 	}
 
 	if ((r = sshbuf_put(tosign, MAGIC_PREAMBLE, MAGIC_PREAMBLE_LEN)) != 0 ||
 	    (r = sshbuf_put_cstring(tosign, sig_namespace)) != 0 ||
 	    (r = sshbuf_put_string(tosign, NULL, 0)) != 0 || /* reserved */
 	    (r = sshbuf_put_cstring(tosign, hashalg)) != 0 ||
 	    (r = sshbuf_put_stringb(tosign, h_message)) != 0) {
 		error_fr(r, "assemble message to sign");
 		goto done;
 	}
 
 	/* If using RSA keys then default to a good signature algorithm */
 	if (sshkey_type_plain(key->type) == KEY_RSA)
 		sign_alg = RSA_SIGN_ALG;
 
 	if (signer != NULL) {
 		if ((r = signer(key, &sig, &slen,
 		    sshbuf_ptr(tosign), sshbuf_len(tosign),
 		    sign_alg, sk_provider, sk_pin, 0, signer_ctx)) != 0) {
 			error_r(r, "Couldn't sign message (signer)");
 			goto done;
 		}
 	} else {
 		if ((r = sshkey_sign(key, &sig, &slen,
 		    sshbuf_ptr(tosign), sshbuf_len(tosign),
 		    sign_alg, sk_provider, sk_pin, 0)) != 0) {
 			error_r(r, "Couldn't sign message");
 			goto done;
 		}
 	}
 
 	if ((r = sshbuf_put(blob, MAGIC_PREAMBLE, MAGIC_PREAMBLE_LEN)) != 0 ||
 	    (r = sshbuf_put_u32(blob, SIG_VERSION)) != 0 ||
 	    (r = sshkey_puts(key, blob)) != 0 ||
 	    (r = sshbuf_put_cstring(blob, sig_namespace)) != 0 ||
 	    (r = sshbuf_put_string(blob, NULL, 0)) != 0 || /* reserved */
 	    (r = sshbuf_put_cstring(blob, hashalg)) != 0 ||
 	    (r = sshbuf_put_string(blob, sig, slen)) != 0) {
 		error_fr(r, "assemble signature object");
 		goto done;
 	}
 
 	if (out != NULL) {
 		*out = blob;
 		blob = NULL;
 	}
 	r = 0;
 done:
 	free(sig);
 	sshbuf_free(blob);
 	sshbuf_free(tosign);
 	return r;
 }
 
 /* Check preamble and version. */
 static int
 sshsig_parse_preamble(struct sshbuf *buf)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	uint32_t sversion;
 
 	if ((r = sshbuf_cmp(buf, 0, MAGIC_PREAMBLE, MAGIC_PREAMBLE_LEN)) != 0 ||
 	    (r = sshbuf_consume(buf, (sizeof(MAGIC_PREAMBLE)-1))) != 0 ||
 	    (r = sshbuf_get_u32(buf, &sversion)) != 0) {
 		error("Couldn't verify signature: invalid format");
 		return r;
 	}
 
 	if (sversion > SIG_VERSION) {
 		error("Signature version %lu is larger than supported "
 		    "version %u", (unsigned long)sversion, SIG_VERSION);
 		return SSH_ERR_INVALID_FORMAT;
 	}
 	return 0;
 }
 
 static int
 sshsig_check_hashalg(const char *hashalg)
 {
 	if (hashalg == NULL ||
 	    match_pattern_list(hashalg, HASHALG_ALLOWED, 0) == 1)
 		return 0;
 	error_f("unsupported hash algorithm \"%.100s\"", hashalg);
 	return SSH_ERR_SIGN_ALG_UNSUPPORTED;
 }
 
 static int
 sshsig_peek_hashalg(struct sshbuf *signature, char **hashalgp)
 {
 	struct sshbuf *buf = NULL;
 	char *hashalg = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (hashalgp != NULL)
 		*hashalgp = NULL;
 	if ((buf = sshbuf_fromb(signature)) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
 	if ((r = sshsig_parse_preamble(buf)) != 0)
 		goto done;
 	if ((r = sshbuf_get_string_direct(buf, NULL, NULL)) != 0 ||
 	    (r = sshbuf_get_string_direct(buf, NULL, NULL)) != 0 ||
 	    (r = sshbuf_get_string(buf, NULL, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(buf, &hashalg, NULL)) != 0 ||
 	    (r = sshbuf_get_string_direct(buf, NULL, NULL)) != 0) {
 		error_fr(r, "parse signature object");
 		goto done;
 	}
 
 	/* success */
 	r = 0;
 	*hashalgp = hashalg;
 	hashalg = NULL;
  done:
 	free(hashalg);
 	sshbuf_free(buf);
 	return r;
 }
 
 static int
 sshsig_wrap_verify(struct sshbuf *signature, const char *hashalg,
     const struct sshbuf *h_message, const char *expect_namespace,
     struct sshkey **sign_keyp, struct sshkey_sig_details **sig_details)
 {
 	int r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *buf = NULL, *toverify = NULL;
 	struct sshkey *key = NULL;
 	const u_char *sig;
 	char *got_namespace = NULL, *sigtype = NULL, *sig_hashalg = NULL;
 	size_t siglen;
 
 	debug_f("verify message length %zu", sshbuf_len(h_message));
 	if (sig_details != NULL)
 		*sig_details = NULL;
 	if (sign_keyp != NULL)
 		*sign_keyp = NULL;
 
 	if ((toverify = sshbuf_new()) == NULL) {
 		error_f("sshbuf_new failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto done;
 	}
 	if ((r = sshbuf_put(toverify, MAGIC_PREAMBLE,
 	    MAGIC_PREAMBLE_LEN)) != 0 ||
 	    (r = sshbuf_put_cstring(toverify, expect_namespace)) != 0 ||
 	    (r = sshbuf_put_string(toverify, NULL, 0)) != 0 || /* reserved */
 	    (r = sshbuf_put_cstring(toverify, hashalg)) != 0 ||
 	    (r = sshbuf_put_stringb(toverify, h_message)) != 0) {
 		error_fr(r, "assemble message to verify");
 		goto done;
 	}
 
 	if ((r = sshsig_parse_preamble(signature)) != 0)
 		goto done;
 
 	if ((r = sshkey_froms(signature, &key)) != 0 ||
 	    (r = sshbuf_get_cstring(signature, &got_namespace, NULL)) != 0 ||
 	    (r = sshbuf_get_string(signature, NULL, NULL)) != 0 ||
 	    (r = sshbuf_get_cstring(signature, &sig_hashalg, NULL)) != 0 ||
 	    (r = sshbuf_get_string_direct(signature, &sig, &siglen)) != 0) {
 		error_fr(r, "parse signature object");
 		goto done;
 	}
 
 	if (sshbuf_len(signature) != 0) {
 		error("Signature contains trailing data");
 		r = SSH_ERR_INVALID_FORMAT;
 		goto done;
 	}
 
 	if (strcmp(expect_namespace, got_namespace) != 0) {
 		error("Couldn't verify signature: namespace does not match");
 		debug_f("expected namespace \"%s\" received \"%s\"",
 		    expect_namespace, got_namespace);
 		r = SSH_ERR_SIGNATURE_INVALID;
 		goto done;
 	}
 	if (strcmp(hashalg, sig_hashalg) != 0) {
 		error("Couldn't verify signature: hash algorithm mismatch");
 		debug_f("expected algorithm \"%s\" received \"%s\"",
 		    hashalg, sig_hashalg);
 		r = SSH_ERR_SIGNATURE_INVALID;
 		goto done;
 	}
 	/* Ensure that RSA keys use an acceptable signature algorithm */
 	if (sshkey_type_plain(key->type) == KEY_RSA) {
 		if ((r = sshkey_get_sigtype(sig, siglen, &sigtype)) != 0) {
 			error_r(r, "Couldn't verify signature: unable to get "
 			    "signature type");
 			goto done;
 		}
 		if (match_pattern_list(sigtype, RSA_SIGN_ALLOWED, 0) != 1) {
 			error("Couldn't verify signature: unsupported RSA "
 			    "signature algorithm %s", sigtype);
 			r = SSH_ERR_SIGN_ALG_UNSUPPORTED;
 			goto done;
 		}
 	}
 	if ((r = sshkey_verify(key, sig, siglen, sshbuf_ptr(toverify),
 	    sshbuf_len(toverify), NULL, 0, sig_details)) != 0) {
 		error_r(r, "Signature verification failed");
 		goto done;
 	}
 
 	/* success */
 	r = 0;
 	if (sign_keyp != NULL) {
 		*sign_keyp = key;
 		key = NULL; /* transferred */
 	}
 done:
 	free(got_namespace);
 	free(sigtype);
 	free(sig_hashalg);
 	sshbuf_free(buf);
 	sshbuf_free(toverify);
 	sshkey_free(key);
 	return r;
 }
 
 static int
 hash_buffer(const struct sshbuf *m, const char *hashalg, struct sshbuf **bp)
 {
 	char *hex, hash[SSH_DIGEST_MAX_LENGTH];
 	int alg, r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *b = NULL;
 
 	*bp = NULL;
 	memset(hash, 0, sizeof(hash));
 
 	if ((r = sshsig_check_hashalg(hashalg)) != 0)
 		return r;
 	if ((alg = ssh_digest_alg_by_name(hashalg)) == -1) {
 		error_f("can't look up hash algorithm %s", hashalg);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	if ((r = ssh_digest_buffer(alg, m, hash, sizeof(hash))) != 0) {
 		error_fr(r, "ssh_digest_buffer");
 		return r;
 	}
 	if ((hex = tohex(hash, ssh_digest_bytes(alg))) != NULL) {
 		debug3_f("final hash: %s", hex);
 		freezero(hex, strlen(hex));
 	}
 	if ((b = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = sshbuf_put(b, hash, ssh_digest_bytes(alg))) != 0) {
 		error_fr(r, "sshbuf_put");
 		goto out;
 	}
 	*bp = b;
 	b = NULL; /* transferred */
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	explicit_bzero(hash, sizeof(hash));
 	return r;
 }
 
 int
 sshsig_signb(struct sshkey *key, const char *hashalg,
     const char *sk_provider, const char *sk_pin,
     const struct sshbuf *message, const char *sig_namespace,
     struct sshbuf **out, sshsig_signer *signer, void *signer_ctx)
 {
 	struct sshbuf *b = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (hashalg == NULL)
 		hashalg = HASHALG_DEFAULT;
 	if (out != NULL)
 		*out = NULL;
 	if ((r = hash_buffer(message, hashalg, &b)) != 0) {
 		error_fr(r, "hash buffer");
 		goto out;
 	}
 	if ((r = sshsig_wrap_sign(key, hashalg, sk_provider, sk_pin, b,
 	    sig_namespace, out, signer, signer_ctx)) != 0)
 		goto out;
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	return r;
 }
 
 int
 sshsig_verifyb(struct sshbuf *signature, const struct sshbuf *message,
     const char *expect_namespace, struct sshkey **sign_keyp,
     struct sshkey_sig_details **sig_details)
 {
 	struct sshbuf *b = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	char *hashalg = NULL;
 
 	if (sig_details != NULL)
 		*sig_details = NULL;
 	if (sign_keyp != NULL)
 		*sign_keyp = NULL;
 	if ((r = sshsig_peek_hashalg(signature, &hashalg)) != 0)
 		return r;
 	debug_f("signature made with hash \"%s\"", hashalg);
 	if ((r = hash_buffer(message, hashalg, &b)) != 0) {
 		error_fr(r, "hash buffer");
 		goto out;
 	}
 	if ((r = sshsig_wrap_verify(signature, hashalg, b, expect_namespace,
 	    sign_keyp, sig_details)) != 0)
 		goto out;
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	free(hashalg);
 	return r;
 }
 
 static int
 hash_file(int fd, const char *hashalg, struct sshbuf **bp)
 {
 	char *hex, rbuf[8192], hash[SSH_DIGEST_MAX_LENGTH];
 	ssize_t n, total = 0;
 	struct ssh_digest_ctx *ctx = NULL;
 	int alg, oerrno, r = SSH_ERR_INTERNAL_ERROR;
 	struct sshbuf *b = NULL;
 
 	*bp = NULL;
 	memset(hash, 0, sizeof(hash));
 
 	if ((r = sshsig_check_hashalg(hashalg)) != 0)
 		return r;
 	if ((alg = ssh_digest_alg_by_name(hashalg)) == -1) {
 		error_f("can't look up hash algorithm %s", hashalg);
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	if ((ctx = ssh_digest_start(alg)) == NULL) {
 		error_f("ssh_digest_start failed");
 		return SSH_ERR_INTERNAL_ERROR;
 	}
 	for (;;) {
 		if ((n = read(fd, rbuf, sizeof(rbuf))) == -1) {
 			if (errno == EINTR || errno == EAGAIN)
 				continue;
 			oerrno = errno;
 			error_f("read: %s", strerror(errno));
 			errno = oerrno;
 			r = SSH_ERR_SYSTEM_ERROR;
 			goto out;
 		} else if (n == 0) {
 			debug2_f("hashed %zu bytes", total);
 			break; /* EOF */
 		}
 		total += (size_t)n;
 		if ((r = ssh_digest_update(ctx, rbuf, (size_t)n)) != 0) {
 			error_fr(r, "ssh_digest_update");
 			goto out;
 		}
 	}
 	if ((r = ssh_digest_final(ctx, hash, sizeof(hash))) != 0) {
 		error_fr(r, "ssh_digest_final");
 		goto out;
 	}
 	if ((hex = tohex(hash, ssh_digest_bytes(alg))) != NULL) {
 		debug3_f("final hash: %s", hex);
 		freezero(hex, strlen(hex));
 	}
 	if ((b = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if ((r = sshbuf_put(b, hash, ssh_digest_bytes(alg))) != 0) {
 		error_fr(r, "sshbuf_put");
 		goto out;
 	}
 	*bp = b;
 	b = NULL; /* transferred */
 	/* success */
 	r = 0;
  out:
 	oerrno = errno;
 	sshbuf_free(b);
 	ssh_digest_free(ctx);
 	explicit_bzero(hash, sizeof(hash));
 	errno = oerrno;
 	return r;
 }
 
 int
 sshsig_sign_fd(struct sshkey *key, const char *hashalg,
     const char *sk_provider, const char *sk_pin,
     int fd, const char *sig_namespace, struct sshbuf **out,
     sshsig_signer *signer, void *signer_ctx)
 {
 	struct sshbuf *b = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (hashalg == NULL)
 		hashalg = HASHALG_DEFAULT;
 	if (out != NULL)
 		*out = NULL;
 	if ((r = hash_file(fd, hashalg, &b)) != 0) {
 		error_fr(r, "hash_file");
 		return r;
 	}
 	if ((r = sshsig_wrap_sign(key, hashalg, sk_provider, sk_pin, b,
 	    sig_namespace, out, signer, signer_ctx)) != 0)
 		goto out;
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	return r;
 }
 
 int
 sshsig_verify_fd(struct sshbuf *signature, int fd,
     const char *expect_namespace, struct sshkey **sign_keyp,
     struct sshkey_sig_details **sig_details)
 {
 	struct sshbuf *b = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 	char *hashalg = NULL;
 
 	if (sig_details != NULL)
 		*sig_details = NULL;
 	if (sign_keyp != NULL)
 		*sign_keyp = NULL;
 	if ((r = sshsig_peek_hashalg(signature, &hashalg)) != 0)
 		return r;
 	debug_f("signature made with hash \"%s\"", hashalg);
 	if ((r = hash_file(fd, hashalg, &b)) != 0) {
 		error_fr(r, "hash_file");
 		goto out;
 	}
 	if ((r = sshsig_wrap_verify(signature, hashalg, b, expect_namespace,
 	    sign_keyp, sig_details)) != 0)
 		goto out;
 	/* success */
 	r = 0;
  out:
 	sshbuf_free(b);
 	free(hashalg);
 	return r;
 }
 
 struct sshsigopt {
 	int ca;
 	char *namespaces;
 	uint64_t valid_after, valid_before;
 };
 
 struct sshsigopt *
 sshsigopt_parse(const char *opts, const char *path, u_long linenum,
     const char **errstrp)
 {
 	struct sshsigopt *ret;
 	int r;
 	char *opt;
 	const char *errstr = NULL;
 
 	if ((ret = calloc(1, sizeof(*ret))) == NULL)
 		return NULL;
 	if (opts == NULL || *opts == '\0')
 		return ret; /* Empty options yields empty options :) */
 
 	while (*opts && *opts != ' ' && *opts != '\t') {
 		/* flag options */
 		if ((r = opt_flag("cert-authority", 0, &opts)) != -1) {
 			ret->ca = 1;
 		} else if (opt_match(&opts, "namespaces")) {
 			if (ret->namespaces != NULL) {
 				errstr = "multiple \"namespaces\" clauses";
 				goto fail;
 			}
 			ret->namespaces = opt_dequote(&opts, &errstr);
 			if (ret->namespaces == NULL)
 				goto fail;
 		} else if (opt_match(&opts, "valid-after")) {
 			if (ret->valid_after != 0) {
 				errstr = "multiple \"valid-after\" clauses";
 				goto fail;
 			}
 			if ((opt = opt_dequote(&opts, &errstr)) == NULL)
 				goto fail;
 			if (parse_absolute_time(opt, &ret->valid_after) != 0 ||
 			    ret->valid_after == 0) {
 				free(opt);
 				errstr = "invalid \"valid-after\" time";
 				goto fail;
 			}
 			free(opt);
 		} else if (opt_match(&opts, "valid-before")) {
 			if (ret->valid_before != 0) {
 				errstr = "multiple \"valid-before\" clauses";
 				goto fail;
 			}
 			if ((opt = opt_dequote(&opts, &errstr)) == NULL)
 				goto fail;
 			if (parse_absolute_time(opt, &ret->valid_before) != 0 ||
 			    ret->valid_before == 0) {
 				free(opt);
 				errstr = "invalid \"valid-before\" time";
 				goto fail;
 			}
 			free(opt);
 		}
 		/*
 		 * Skip the comma, and move to the next option
 		 * (or break out if there are no more).
 		 */
 		if (*opts == '\0' || *opts == ' ' || *opts == '\t')
 			break;		/* End of options. */
 		/* Anything other than a comma is an unknown option */
 		if (*opts != ',') {
 			errstr = "unknown key option";
 			goto fail;
 		}
 		opts++;
 		if (*opts == '\0') {
 			errstr = "unexpected end-of-options";
 			goto fail;
 		}
 	}
 	/* final consistency check */
 	if (ret->valid_after != 0 && ret->valid_before != 0 &&
 	    ret->valid_before <= ret->valid_after) {
 		errstr = "\"valid-before\" time is before \"valid-after\"";
 		goto fail;
 	}
 	/* success */
 	return ret;
  fail:
 	if (errstrp != NULL)
 		*errstrp = errstr;
 	sshsigopt_free(ret);
 	return NULL;
 }
 
 void
 sshsigopt_free(struct sshsigopt *opts)
 {
 	if (opts == NULL)
 		return;
 	free(opts->namespaces);
 	free(opts);
 }
 
 static int
 parse_principals_key_and_options(const char *path, u_long linenum, char *line,
     const char *required_principal, char **principalsp, struct sshkey **keyp,
     struct sshsigopt **sigoptsp)
 {
 	char *opts = NULL, *tmp, *cp, *principals = NULL;
 	const char *reason = NULL;
 	struct sshsigopt *sigopts = NULL;
 	struct sshkey *key = NULL;
 	int r = SSH_ERR_INTERNAL_ERROR;
 
 	if (principalsp != NULL)
 		*principalsp = NULL;
 	if (sigoptsp != NULL)
 		*sigoptsp = NULL;
 	if (keyp != NULL)
 		*keyp = NULL;
 
 	cp = line;
-	cp = cp + strspn(cp, " \t"); /* skip leading whitespace */
+	cp = cp + strspn(cp, " \t\n\r"); /* skip leading whitespace */
 	if (*cp == '#' || *cp == '\0')
 		return SSH_ERR_KEY_NOT_FOUND; /* blank or all-comment line */
 
 	/* format: identity[,identity...] [option[,option...]] key */
 	if ((tmp = strdelimw(&cp)) == NULL || cp == NULL) {
 		error("%s:%lu: invalid line", path, linenum);
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	if ((principals = strdup(tmp)) == NULL) {
 		error_f("strdup failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	/*
 	 * Bail out early if we're looking for a particular principal and this
 	 * line does not list it.
 	 */
 	if (required_principal != NULL) {
 		if (match_pattern_list(required_principal,
 		    principals, 0) != 1) {
 			/* principal didn't match */
 			r = SSH_ERR_KEY_NOT_FOUND;
 			goto out;
 		}
 		debug_f("%s:%lu: matched principal \"%s\"",
 		    path, linenum, required_principal);
 	}
 
 	if ((key = sshkey_new(KEY_UNSPEC)) == NULL) {
 		error_f("sshkey_new failed");
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 	if (sshkey_read(key, &cp) != 0) {
 		/* no key? Check for options */
 		opts = cp;
 		if (sshkey_advance_past_options(&cp) != 0) {
 			error("%s:%lu: invalid options", path, linenum);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		if (cp == NULL || *cp == '\0') {
 			error("%s:%lu: missing key", path, linenum);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 		*cp++ = '\0';
 		skip_space(&cp);
 		if (sshkey_read(key, &cp) != 0) {
 			error("%s:%lu: invalid key", path, linenum);
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
 	}
 	debug3("%s:%lu: options %s", path, linenum, opts == NULL ? "" : opts);
 	if ((sigopts = sshsigopt_parse(opts, path, linenum, &reason)) == NULL) {
 		error("%s:%lu: bad options: %s", path, linenum, reason);
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
 	/* success */
 	if (principalsp != NULL) {
 		*principalsp = principals;
 		principals = NULL; /* transferred */
 	}
 	if (sigoptsp != NULL) {
 		*sigoptsp = sigopts;
 		sigopts = NULL; /* transferred */
 	}
 	if (keyp != NULL) {
 		*keyp = key;
 		key = NULL; /* transferred */
 	}
 	r = 0;
  out:
 	free(principals);
 	sshsigopt_free(sigopts);
 	sshkey_free(key);
 	return r;
 }
 
 static int
 cert_filter_principals(const char *path, u_long linenum,
     char **principalsp, const struct sshkey *cert, uint64_t verify_time)
 {
 	char *cp, *oprincipals, *principals;
 	const char *reason;
 	struct sshbuf *nprincipals;
 	int r = SSH_ERR_INTERNAL_ERROR, success = 0;
 	u_int i;
 
 	oprincipals = principals = *principalsp;
 	*principalsp = NULL;
 
 	if ((nprincipals = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
 
 	while ((cp = strsep(&principals, ",")) != NULL && *cp != '\0') {
 		/* Check certificate validity */
 		if ((r = sshkey_cert_check_authority(cert, 0, 1, 0,
 		    verify_time, NULL, &reason)) != 0) {
 			debug("%s:%lu: principal \"%s\" not authorized: %s",
 			    path, linenum, cp, reason);
 			continue;
 		}
 		/* Return all matching principal names from the cert */
 		for (i = 0; i < cert->cert->nprincipals; i++) {
 			if (match_pattern(cert->cert->principals[i], cp)) {
 				if ((r = sshbuf_putf(nprincipals, "%s%s",
 					sshbuf_len(nprincipals) != 0 ? "," : "",
 						cert->cert->principals[i])) != 0) {
 					error_f("buffer error");
 					goto out;
 				}
 			}
 		}
 	}
 	if (sshbuf_len(nprincipals) == 0) {
 		error("%s:%lu: no valid principals found", path, linenum);
 		r = SSH_ERR_KEY_CERT_INVALID;
 		goto out;
 	}
 	if ((principals = sshbuf_dup_string(nprincipals)) == NULL) {
 		error_f("buffer error");
 		goto out;
 	}
 	/* success */
 	success = 1;
 	*principalsp = principals;
  out:
 	sshbuf_free(nprincipals);
 	free(oprincipals);
 	return success ? 0 : r;
 }
 
 static int
 check_allowed_keys_line(const char *path, u_long linenum, char *line,
     const struct sshkey *sign_key, const char *principal,
     const char *sig_namespace, uint64_t verify_time, char **principalsp)
 {
 	struct sshkey *found_key = NULL;
 	char *principals = NULL;
 	int r, success = 0;
 	const char *reason = NULL;
 	struct sshsigopt *sigopts = NULL;
 	char tvalid[64], tverify[64];
 
 	if (principalsp != NULL)
 		*principalsp = NULL;
 
 	/* Parse the line */
 	if ((r = parse_principals_key_and_options(path, linenum, line,
 	    principal, &principals, &found_key, &sigopts)) != 0) {
 		/* error already logged */
 		goto done;
 	}
 
 	if (!sigopts->ca && sshkey_equal(found_key, sign_key)) {
 		/* Exact match of key */
 		debug("%s:%lu: matched key", path, linenum);
 	} else if (sigopts->ca && sshkey_is_cert(sign_key) &&
 	    sshkey_equal_public(sign_key->cert->signature_key, found_key)) {
 		if (principal) {
 			/* Match certificate CA key with specified principal */
 			if ((r = sshkey_cert_check_authority(sign_key, 0, 1, 0,
 			    verify_time, principal, &reason)) != 0) {
 				error("%s:%lu: certificate not authorized: %s",
 				    path, linenum, reason);
 				goto done;
 			}
 			debug("%s:%lu: matched certificate CA key",
 			    path, linenum);
 		} else {
 			/* No principal specified - find all matching ones */
 			if ((r = cert_filter_principals(path, linenum,
 			    &principals, sign_key, verify_time)) != 0) {
 				/* error already displayed */
 				debug_r(r, "%s:%lu: cert_filter_principals",
 				    path, linenum);
 				goto done;
 			}
 			debug("%s:%lu: matched certificate CA key",
 			    path, linenum);
 		}
 	} else {
 		/* Didn't match key */
 		goto done;
 	}
 
 	/* Check whether options preclude the use of this key */
 	if (sigopts->namespaces != NULL && sig_namespace != NULL &&
 	    match_pattern_list(sig_namespace, sigopts->namespaces, 0) != 1) {
 		error("%s:%lu: key is not permitted for use in signature "
 		    "namespace \"%s\"", path, linenum, sig_namespace);
 		goto done;
 	}
 
 	/* check key time validity */
 	format_absolute_time((uint64_t)verify_time, tverify, sizeof(tverify));
 	if (sigopts->valid_after != 0 &&
 	    (uint64_t)verify_time < sigopts->valid_after) {
 		format_absolute_time(sigopts->valid_after,
 		    tvalid, sizeof(tvalid));
 		error("%s:%lu: key is not yet valid: "
 		    "verify time %s < valid-after %s", path, linenum,
 		    tverify, tvalid);
 		goto done;
 	}
 	if (sigopts->valid_before != 0 &&
 	    (uint64_t)verify_time > sigopts->valid_before) {
 		format_absolute_time(sigopts->valid_before,
 		    tvalid, sizeof(tvalid));
 		error("%s:%lu: key has expired: "
 		    "verify time %s > valid-before %s", path, linenum,
 		    tverify, tvalid);
 		goto done;
 	}
 	success = 1;
 
  done:
 	if (success && principalsp != NULL) {
 		*principalsp = principals;
 		principals = NULL; /* transferred */
 	}
 	free(principals);
 	sshkey_free(found_key);
 	sshsigopt_free(sigopts);
 	return success ? 0 : SSH_ERR_KEY_NOT_FOUND;
 }
 
 int
 sshsig_check_allowed_keys(const char *path, const struct sshkey *sign_key,
     const char *principal, const char *sig_namespace, uint64_t verify_time)
 {
 	FILE *f = NULL;
 	char *line = NULL;
 	size_t linesize = 0;
 	u_long linenum = 0;
 	int r = SSH_ERR_KEY_NOT_FOUND, oerrno;
 
 	/* Check key and principal against file */
 	if ((f = fopen(path, "r")) == NULL) {
 		oerrno = errno;
 		error("Unable to open allowed keys file \"%s\": %s",
 		    path, strerror(errno));
 		errno = oerrno;
 		return SSH_ERR_SYSTEM_ERROR;
 	}
 
 	while (getline(&line, &linesize, f) != -1) {
 		linenum++;
 		r = check_allowed_keys_line(path, linenum, line, sign_key,
 		    principal, sig_namespace, verify_time, NULL);
 		free(line);
 		line = NULL;
 		linesize = 0;
 		if (r == SSH_ERR_KEY_NOT_FOUND)
 			continue;
 		else if (r == 0) {
 			/* success */
 			fclose(f);
 			return 0;
 		} else
 			break;
 	}
 	/* Either we hit an error parsing or we simply didn't find the key */
 	fclose(f);
 	free(line);
 	return r;
 }
 
 int
 sshsig_find_principals(const char *path, const struct sshkey *sign_key,
     uint64_t verify_time, char **principals)
 {
 	FILE *f = NULL;
 	char *line = NULL;
 	size_t linesize = 0;
 	u_long linenum = 0;
 	int r = SSH_ERR_KEY_NOT_FOUND, oerrno;
 
 	if ((f = fopen(path, "r")) == NULL) {
 		oerrno = errno;
 		error("Unable to open allowed keys file \"%s\": %s",
 		    path, strerror(errno));
 		errno = oerrno;
 		return SSH_ERR_SYSTEM_ERROR;
 	}
 
 	while (getline(&line, &linesize, f) != -1) {
 		linenum++;
 		r = check_allowed_keys_line(path, linenum, line,
 		    sign_key, NULL, NULL, verify_time, principals);
 		free(line);
 		line = NULL;
 		linesize = 0;
 		if (r == SSH_ERR_KEY_NOT_FOUND)
 			continue;
 		else if (r == 0) {
 			/* success */
 			fclose(f);
 			return 0;
 		} else
 			break;
 	}
 	free(line);
 	/* Either we hit an error parsing or we simply didn't find the key */
 	if (ferror(f) != 0) {
 		oerrno = errno;
 		fclose(f);
 		error("Unable to read allowed keys file \"%s\": %s",
 		    path, strerror(errno));
 		errno = oerrno;
 		return SSH_ERR_SYSTEM_ERROR;
 	}
 	fclose(f);
 	return r;
 }
 
 int
 sshsig_match_principals(const char *path, const char *principal,
     char ***principalsp, size_t *nprincipalsp)
 {
 	FILE *f = NULL;
 	char *found, *line = NULL, **principals = NULL, **tmp;
 	size_t i, nprincipals = 0, linesize = 0;
 	u_long linenum = 0;
 	int oerrno = 0, r, ret = 0;
 
 	if (principalsp != NULL)
 		*principalsp = NULL;
 	if (nprincipalsp != NULL)
 		*nprincipalsp = 0;
 
 	/* Check key and principal against file */
 	if ((f = fopen(path, "r")) == NULL) {
 		oerrno = errno;
 		error("Unable to open allowed keys file \"%s\": %s",
 		    path, strerror(errno));
 		errno = oerrno;
 		return SSH_ERR_SYSTEM_ERROR;
 	}
 
 	while (getline(&line, &linesize, f) != -1) {
 		linenum++;
 		/* Parse the line */
 		if ((r = parse_principals_key_and_options(path, linenum, line,
 		    principal, &found, NULL, NULL)) != 0) {
 			if (r == SSH_ERR_KEY_NOT_FOUND)
 				continue;
 			ret = r;
 			oerrno = errno;
 			break; /* unexpected error */
 		}
 		if ((tmp = recallocarray(principals, nprincipals,
 		    nprincipals + 1, sizeof(*principals))) == NULL) {
 			ret = SSH_ERR_ALLOC_FAIL;
 			free(found);
 			break;
 		}
 		principals = tmp;
 		principals[nprincipals++] = found; /* transferred */
 		free(line);
 		line = NULL;
 		linesize = 0;
 	}
 	fclose(f);
 
 	if (ret == 0) {
 		if (nprincipals == 0)
 			ret = SSH_ERR_KEY_NOT_FOUND;
 		if (nprincipalsp != 0)
 			*nprincipalsp = nprincipals;
 		if (principalsp != NULL) {
 			*principalsp = principals;
 			principals = NULL; /* transferred */
 			nprincipals = 0;
 		}
 	}
 
 	for (i = 0; i < nprincipals; i++)
 		free(principals[i]);
 	free(principals);
 
 	errno = oerrno;
 	return ret;
 }
 
 int
 sshsig_get_pubkey(struct sshbuf *signature, struct sshkey **pubkey)
 {
 	struct sshkey *pk = NULL;
 	int r = SSH_ERR_SIGNATURE_INVALID;
 
 	if (pubkey == NULL)
 		return SSH_ERR_INTERNAL_ERROR;
 	if ((r = sshsig_parse_preamble(signature)) != 0)
 		return r;
 	if ((r = sshkey_froms(signature, &pk)) != 0)
 		return r;
 
 	*pubkey = pk;
 	pk = NULL;
 	return 0;
 }
diff --git a/version.h b/version.h
index a4b7b594ccb2..052a5817be23 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
-/* $OpenBSD: version.h,v 1.100 2023/12/18 14:48:44 djm Exp $ */
+/* $OpenBSD: version.h,v 1.101 2024/03/11 04:59:47 djm Exp $ */
 
-#define SSH_VERSION	"OpenSSH_9.6"
+#define SSH_VERSION	"OpenSSH_9.7"
 
 #define SSH_PORTABLE	"p1"
 #define SSH_RELEASE	SSH_VERSION SSH_PORTABLE
diff --git a/xmss_hash.c b/xmss_hash.c
index db0e5fa36597..70c126ae25a3 100644
--- a/xmss_hash.c
+++ b/xmss_hash.c
@@ -1,137 +1,137 @@
-/* $OpenBSD: xmss_hash.c,v 1.3 2022/04/20 16:00:25 millert Exp $ */
+/* $OpenBSD: xmss_hash.c,v 1.4 2023/12/20 00:06:25 jsg Exp $ */
 /*
 hash.c version 20160722
 Andreas Hülsing
 Joost Rijneveld
 Public domain.
 */
 
 #include "includes.h"
 #ifdef WITH_XMSS
 
 #include "xmss_hash_address.h"
 #include "xmss_commons.h"
 #include "xmss_hash.h"
 
 #include <stddef.h>
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
 #include <stdio.h>
 #include <string.h>
 
 int core_hash_SHA2(unsigned char *, const unsigned int, const unsigned char *,
     unsigned int, const unsigned char *, unsigned long long, unsigned int);
 
 unsigned char* addr_to_byte(unsigned char *bytes, const uint32_t addr[8]){
 #if IS_LITTLE_ENDIAN==1 
   int i = 0;
   for(i=0;i<8;i++)
     to_byte(bytes+i*4, addr[i],4);
   return bytes;  
 #else
   memcpy(bytes, addr, 32);
   return bytes; 
 #endif   
 }
 
 int core_hash_SHA2(unsigned char *out, const unsigned int type, const unsigned char *key, unsigned int keylen, const unsigned char *in, unsigned long long inlen, unsigned int n){  
   unsigned long long i = 0;
   unsigned char buf[inlen + n + keylen];
   
   // Input is (toByte(X, 32) || KEY || M) 
   
   // set toByte
   to_byte(buf, type, n);
   
   for (i=0; i < keylen; i++) {
     buf[i+n] = key[i];
   }
   
   for (i=0; i < inlen; i++) {
     buf[keylen + n + i] = in[i];
   }
 
   if (n == 32) {
     SHA256(buf, inlen + keylen + n, out);
     return 0;
   }
   else {
     if (n == 64) {
       SHA512(buf, inlen + keylen + n, out);
       return 0;
     }
   }
   return 1;
 }
 
 /**
  * Implements PRF
  */
 int prf(unsigned char *out, const unsigned char *in, const unsigned char *key, unsigned int keylen)
 { 
   return core_hash_SHA2(out, 3, key, keylen, in, 32, keylen);
 }
 
 /*
- * Implemts H_msg
+ * Implements H_msg
  */
 int h_msg(unsigned char *out, const unsigned char *in, unsigned long long inlen, const unsigned char *key, const unsigned int keylen, const unsigned int n)
 {
   if (keylen != 3*n){
     // H_msg takes 3n-bit keys, but n does not match the keylength of keylen
     return -1;
   }  
   return core_hash_SHA2(out, 2, key, keylen, in, inlen, n);
 }
 
 /**
  * We assume the left half is in in[0]...in[n-1]
  */
 int hash_h(unsigned char *out, const unsigned char *in, const unsigned char *pub_seed, uint32_t addr[8], const unsigned int n)
 {
 
   unsigned char buf[2*n];
   unsigned char key[n];
   unsigned char bitmask[2*n];
   unsigned char byte_addr[32];
   unsigned int i;
 
   setKeyAndMask(addr, 0);
   addr_to_byte(byte_addr, addr);
   prf(key, byte_addr, pub_seed, n);
   // Use MSB order
   setKeyAndMask(addr, 1);
   addr_to_byte(byte_addr, addr);
   prf(bitmask, byte_addr, pub_seed, n);
   setKeyAndMask(addr, 2);
   addr_to_byte(byte_addr, addr);
   prf(bitmask+n, byte_addr, pub_seed, n);
   for (i = 0; i < 2*n; i++) {
     buf[i] = in[i] ^ bitmask[i];
   }
   return core_hash_SHA2(out, 1, key, n, buf, 2*n, n);
 }
 
 int hash_f(unsigned char *out, const unsigned char *in, const unsigned char *pub_seed, uint32_t addr[8], const unsigned int n)
 {
   unsigned char buf[n];
   unsigned char key[n];
   unsigned char bitmask[n];
   unsigned char byte_addr[32];
   unsigned int i;
 
   setKeyAndMask(addr, 0);  
   addr_to_byte(byte_addr, addr);  
   prf(key, byte_addr, pub_seed, n);
   
   setKeyAndMask(addr, 1);
   addr_to_byte(byte_addr, addr);
   prf(bitmask, byte_addr, pub_seed, n);
   
   for (i = 0; i < n; i++) {
     buf[i] = in[i] ^ bitmask[i];
   }
   return core_hash_SHA2(out, 0, key, n, buf, n, n);
 }
 #endif /* WITH_XMSS */