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usr.sbin/rpc.tlsclntd/rpc.tlsclntd.c
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/*- | |||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD | |||||
* | |||||
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/ | |||||
* Authors: Doug Rabson <dfr@rabson.org> | |||||
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> | |||||
* | |||||
* 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 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 AUTHOR 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. | |||||
*/ | |||||
/* | |||||
* Extensively modified from /usr/src/usr.sbin/gssd.c r344402 for | |||||
* the client side of kernel RPC-over-TLS by Rick Macklem. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include <sys/param.h> | |||||
#include <sys/types.h> | |||||
#include <sys/queue.h> | |||||
#include <sys/linker.h> | |||||
#include <sys/module.h> | |||||
#include <sys/stat.h> | |||||
#include <sys/sysctl.h> | |||||
#include <sys/syslog.h> | |||||
#include <sys/time.h> | |||||
#include <err.h> | |||||
#include <getopt.h> | |||||
#include <libutil.h> | |||||
#include <netdb.h> | |||||
#include <signal.h> | |||||
#include <stdarg.h> | |||||
#include <stdbool.h> | |||||
#include <stdio.h> | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
#include <unistd.h> | |||||
#include <rpc/rpc.h> | |||||
#include <rpc/rpc_com.h> | |||||
#include <rpc/rpcsec_tls.h> | |||||
#include <openssl/opensslconf.h> | |||||
#include <openssl/bio.h> | |||||
#include <openssl/ssl.h> | |||||
#include <openssl/err.h> | |||||
#include <openssl/x509v3.h> | |||||
#include "rpctlscd.h" | |||||
#include "rpc.tlscommon.h" | |||||
#ifndef _PATH_RPCTLSCDSOCK | |||||
#define _PATH_RPCTLSCDSOCK "/var/run/rpc.tlsclntd.sock" | |||||
#endif | |||||
#ifndef _PATH_CERTANDKEY | |||||
#define _PATH_CERTANDKEY "/etc/rpc.tlsclntd/" | |||||
#endif | |||||
#ifndef _PATH_RPCTLSCDPID | |||||
#define _PATH_RPCTLSCDPID "/var/run/rpc.tlsclntd.pid" | |||||
#endif | |||||
/* Global variables also used by rpc.tlscommon.c. */ | |||||
int rpctls_debug_level; | |||||
rmacklem: Does anyone know what the best setting is for
SSL_CTX_set_cipher_lisr() when using KTLS?
I… | |||||
Done Inline ActionsHmmm, I would say to let OpenSSL use its default settings, but you might want to restrict this a bit to match the ciphers supported by KTLS. You can use 'openssl ciphers -s <string>' to see what ciphers match the strings you use. I would use "AESGCM" for now which matches all of the cipher variants using AES-GCM. Once Chacha20-Poly1305 support for KTLS lands, you should change this to "AESGCM:CHACHA20". The older AES-CBC variants would be covered by "AES+SHA", but we don't have RX support for those in all cases and they really shouldn't be used unless someone needs them. You might consider adding a command line option to allow the user to override it? Keep in mind that TLS 1.3 uses a different API for this than TLS <= 1.2, and we don't currently support KTLS RX for TLS 1.3. jhb: Hmmm, I would say to let OpenSSL use its default settings, but you might want to restrict this… | |||||
bool rpctls_verbose; | |||||
SSL_CTX *rpctls_ctx = NULL; | |||||
const char *rpctls_verify_cafile = NULL; | |||||
const char *rpctls_verify_capath = NULL; | |||||
char *rpctls_crlfile = NULL; | |||||
bool rpctls_cert = false; | |||||
bool rpctls_gothup = false; | |||||
struct ssl_list rpctls_ssllist; | |||||
static struct pidfh *rpctls_pfh = NULL; | |||||
static const char *rpctls_certdir = _PATH_CERTANDKEY; | |||||
static const char *rpctls_ciphers = NULL; | |||||
static uint64_t rpctls_ssl_refno = 0; | |||||
static uint64_t rpctls_ssl_sec = 0; | |||||
static uint64_t rpctls_ssl_usec = 0; | |||||
static void rpctlscd_terminate(int); | |||||
static SSL_CTX *rpctls_setupcl_ssl(void); | |||||
static SSL *rpctls_connect(SSL_CTX *ctx, int s, char *certname, | |||||
u_int certlen, X509 **certp); | |||||
static void rpctls_huphandler(int sig __unused); | |||||
extern void rpctlscd_1(struct svc_req *rqstp, SVCXPRT *transp); | |||||
static struct option longopts[] = { | |||||
{ "certdir", required_argument, NULL, 'D' }, | |||||
{ "ciphers", required_argument, NULL, 'C' }, | |||||
{ "debuglevel", no_argument, NULL, 'd' }, | |||||
{ "verifylocs", required_argument, NULL, 'l' }, | |||||
{ "mutualverf", no_argument, NULL, 'm' }, | |||||
{ "verifydir", required_argument, NULL, 'p' }, | |||||
{ "crl", required_argument, NULL, 'r' }, | |||||
{ "verbose", no_argument, NULL, 'v' }, | |||||
{ NULL, 0, NULL, 0 } | |||||
}; | |||||
int | |||||
main(int argc, char **argv) | |||||
{ | |||||
/* | |||||
* We provide an RPC service on a local-domain socket. The | |||||
* kernel rpctls code will upcall to this daemon to do the initial | |||||
* TLS handshake. | |||||
*/ | |||||
struct sockaddr_un sun; | |||||
int ch, fd, oldmask; | |||||
SVCXPRT *xprt; | |||||
bool tls_enable; | |||||
struct timeval tm; | |||||
struct timezone tz; | |||||
pid_t otherpid; | |||||
size_t tls_enable_len; | |||||
/* Check that another rpctlscd isn't already running. */ | |||||
rpctls_pfh = pidfile_open(_PATH_RPCTLSCDPID, 0600, &otherpid); | |||||
if (rpctls_pfh == NULL) { | |||||
if (errno == EEXIST) | |||||
errx(1, "rpctlscd already running, pid: %d.", otherpid); | |||||
warn("cannot open or create pidfile"); | |||||
} | |||||
/* Check to see that the ktls is enabled. */ | |||||
tls_enable_len = sizeof(tls_enable); | |||||
if (sysctlbyname("kern.ipc.tls.enable", &tls_enable, &tls_enable_len, | |||||
NULL, 0) != 0 || !tls_enable) | |||||
errx(1, "Kernel TLS not enabled"); | |||||
/* Get the time when this daemon is started. */ | |||||
gettimeofday(&tm, &tz); | |||||
rpctls_ssl_sec = tm.tv_sec; | |||||
rpctls_ssl_usec = tm.tv_usec; | |||||
rpctls_verbose = false; | |||||
while ((ch = getopt_long(argc, argv, "CD:dl:mp:r:v", longopts, NULL)) != | |||||
-1) { | |||||
switch (ch) { | |||||
case 'C': | |||||
rpctls_ciphers = optarg; | |||||
break; | |||||
case 'D': | |||||
rpctls_certdir = optarg; | |||||
break; | |||||
case 'd': | |||||
rpctls_debug_level++; | |||||
break; | |||||
case 'l': | |||||
rpctls_verify_cafile = optarg; | |||||
break; | |||||
case 'm': | |||||
rpctls_cert = true; | |||||
break; | |||||
case 'p': | |||||
rpctls_verify_capath = optarg; | |||||
break; | |||||
case 'r': | |||||
rpctls_crlfile = optarg; | |||||
break; | |||||
case 'v': | |||||
rpctls_verbose = true; | |||||
break; | |||||
default: | |||||
fprintf(stderr, "usage: %s " | |||||
"[-C/--ciphers preferred_ciphers] " | |||||
"[-D/--certdir certdir] [-d/--debuglevel] " | |||||
"[-l/--verifylocs CAfile] [-m/--mutualverf] " | |||||
"[-p/--verifydir CApath] [-r/--crl CRLfile] " | |||||
"[-v/--verbose]\n", argv[0]); | |||||
exit(1); | |||||
break; | |||||
} | |||||
} | |||||
if (rpctls_crlfile != NULL && rpctls_verify_cafile == NULL && | |||||
rpctls_verify_capath == NULL) | |||||
errx(1, "-r requires the -l <CAfile> and/or " | |||||
"-p <CApath> options"); | |||||
if (modfind("krpc") < 0) { | |||||
/* Not present in kernel, try loading it */ | |||||
if (kldload("krpc") < 0 || modfind("krpc") < 0) | |||||
errx(1, "Kernel RPC is not available"); | |||||
} | |||||
/* | |||||
* Set up the SSL_CTX *. | |||||
* Do it now, before daemonizing, in case the private key | |||||
* is encrypted and requires a passphrase to be entered. | |||||
*/ | |||||
rpctls_ctx = rpctls_setupcl_ssl(); | |||||
if (rpctls_ctx == NULL) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, "Can't set up TLS context"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't set up TLS context"); | |||||
} | |||||
LIST_INIT(&rpctls_ssllist); | |||||
if (!rpctls_debug_level) { | |||||
if (daemon(0, 0) != 0) | |||||
err(1, "Can't daemonize"); | |||||
signal(SIGINT, SIG_IGN); | |||||
signal(SIGQUIT, SIG_IGN); | |||||
signal(SIGHUP, SIG_IGN); | |||||
} | |||||
signal(SIGTERM, rpctlscd_terminate); | |||||
signal(SIGPIPE, SIG_IGN); | |||||
signal(SIGHUP, rpctls_huphandler); | |||||
pidfile_write(rpctls_pfh); | |||||
memset(&sun, 0, sizeof sun); | |||||
sun.sun_family = AF_LOCAL; | |||||
unlink(_PATH_RPCTLSCDSOCK); | |||||
strcpy(sun.sun_path, _PATH_RPCTLSCDSOCK); | |||||
sun.sun_len = SUN_LEN(&sun); | |||||
fd = socket(AF_LOCAL, SOCK_STREAM, 0); | |||||
if (fd < 0) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, "Can't create local rpctlscd socket"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't create local rpctlscd socket"); | |||||
} | |||||
oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO); | |||||
if (bind(fd, (struct sockaddr *)&sun, sun.sun_len) < 0) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, "Can't bind local rpctlscd socket"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't bind local rpctlscd socket"); | |||||
} | |||||
umask(oldmask); | |||||
if (listen(fd, SOMAXCONN) < 0) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, | |||||
"Can't listen on local rpctlscd socket"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't listen on local rpctlscd socket"); | |||||
} | |||||
xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE); | |||||
if (!xprt) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, | |||||
"Can't create transport for local rpctlscd socket"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't create transport for local rpctlscd socket"); | |||||
} | |||||
if (!svc_reg(xprt, RPCTLSCD, RPCTLSCDVERS, rpctlscd_1, NULL)) { | |||||
if (rpctls_debug_level == 0) { | |||||
syslog(LOG_ERR, | |||||
"Can't register service for local rpctlscd socket"); | |||||
exit(1); | |||||
} | |||||
err(1, "Can't register service for local rpctlscd socket"); | |||||
} | |||||
rpctls_syscall(RPCTLS_SYSC_CLSETPATH, _PATH_RPCTLSCDSOCK); | |||||
rpctls_svc_run(); | |||||
rpctls_syscall(RPCTLS_SYSC_CLSHUTDOWN, ""); | |||||
SSL_CTX_free(rpctls_ctx); | |||||
EVP_cleanup(); | |||||
return (0); | |||||
} | |||||
bool_t | |||||
rpctlscd_null_1_svc(__unused void *argp, __unused void *result, | |||||
__unused struct svc_req *rqstp) | |||||
{ | |||||
rpctls_verbose_out("rpctlscd_null: done\n"); | |||||
return (TRUE); | |||||
} | |||||
bool_t | |||||
rpctlscd_connect_1_svc(struct rpctlscd_connect_arg *argp, | |||||
struct rpctlscd_connect_res *result, __unused struct svc_req *rqstp) | |||||
{ | |||||
int s; | |||||
SSL *ssl; | |||||
struct ssl_entry *newslp; | |||||
X509 *cert; | |||||
rpctls_verbose_out("rpctlsd_connect: started\n"); | |||||
/* Get the socket fd from the kernel. */ | |||||
s = rpctls_syscall(RPCTLS_SYSC_CLSOCKET, ""); | |||||
if (s < 0) { | |||||
result->reterr = RPCTLSERR_NOSOCKET; | |||||
return (TRUE); | |||||
} | |||||
/* Do a TLS connect handshake. */ | |||||
ssl = rpctls_connect(rpctls_ctx, s, argp->certname.certname_val, | |||||
argp->certname.certname_len, &cert); | |||||
if (ssl == NULL) { | |||||
rpctls_verbose_out("rpctlsd_connect: can't do TLS " | |||||
"handshake\n"); | |||||
result->reterr = RPCTLSERR_NOSSL; | |||||
} else { | |||||
result->reterr = RPCTLSERR_OK; | |||||
result->sec = rpctls_ssl_sec; | |||||
result->usec = rpctls_ssl_usec; | |||||
result->ssl = ++rpctls_ssl_refno; | |||||
/* Hard to believe this will ever wrap around.. */ | |||||
if (rpctls_ssl_refno == 0) | |||||
result->ssl = ++rpctls_ssl_refno; | |||||
} | |||||
if (ssl == NULL) { | |||||
/* | |||||
* For RPC-over-TLS, this upcall is expected | |||||
* to close off the socket. | |||||
*/ | |||||
close(s); | |||||
return (TRUE); | |||||
} | |||||
/* Maintain list of all current SSL *'s */ | |||||
newslp = malloc(sizeof(*newslp)); | |||||
newslp->refno = rpctls_ssl_refno; | |||||
newslp->s = s; | |||||
newslp->shutoff = false; | |||||
newslp->ssl = ssl; | |||||
newslp->cert = cert; | |||||
LIST_INSERT_HEAD(&rpctls_ssllist, newslp, next); | |||||
return (TRUE); | |||||
} | |||||
bool_t | |||||
rpctlscd_handlerecord_1_svc(struct rpctlscd_handlerecord_arg *argp, | |||||
struct rpctlscd_handlerecord_res *result, __unused struct svc_req *rqstp) | |||||
{ | |||||
struct ssl_entry *slp; | |||||
int ret; | |||||
char junk; | |||||
slp = NULL; | |||||
if (argp->sec == rpctls_ssl_sec && argp->usec == | |||||
rpctls_ssl_usec) { | |||||
LIST_FOREACH(slp, &rpctls_ssllist, next) { | |||||
if (slp->refno == argp->ssl) | |||||
break; | |||||
} | |||||
} | |||||
if (slp != NULL) { | |||||
rpctls_verbose_out("rpctlscd_handlerecord fd=%d\n", | |||||
slp->s); | |||||
/* | |||||
* An SSL_read() of 0 bytes should fail, but it should | |||||
* handle the non-application data record before doing so. | |||||
*/ | |||||
ret = SSL_read(slp->ssl, &junk, 0); | |||||
if (ret <= 0) { | |||||
/* Check to see if this was a close alert. */ | |||||
ret = SSL_get_shutdown(slp->ssl); | |||||
if ((ret & (SSL_SENT_SHUTDOWN | | |||||
SSL_RECEIVED_SHUTDOWN)) == SSL_RECEIVED_SHUTDOWN) | |||||
SSL_shutdown(slp->ssl); | |||||
} else { | |||||
if (rpctls_debug_level == 0) | |||||
syslog(LOG_ERR, "SSL_read returned %d", ret); | |||||
else | |||||
fprintf(stderr, "SSL_read returned %d\n", ret); | |||||
} | |||||
result->reterr = RPCTLSERR_OK; | |||||
} else | |||||
result->reterr = RPCTLSERR_NOSSL; | |||||
return (TRUE); | |||||
} | |||||
bool_t | |||||
rpctlscd_disconnect_1_svc(struct rpctlscd_disconnect_arg *argp, | |||||
struct rpctlscd_disconnect_res *result, __unused struct svc_req *rqstp) | |||||
{ | |||||
struct ssl_entry *slp; | |||||
int ret; | |||||
slp = NULL; | |||||
if (argp->sec == rpctls_ssl_sec && argp->usec == | |||||
rpctls_ssl_usec) { | |||||
LIST_FOREACH(slp, &rpctls_ssllist, next) { | |||||
if (slp->refno == argp->ssl) | |||||
break; | |||||
} | |||||
} | |||||
if (slp != NULL) { | |||||
rpctls_verbose_out("rpctlscd_disconnect: fd=%d closed\n", | |||||
slp->s); | |||||
LIST_REMOVE(slp, next); | |||||
if (!slp->shutoff) { | |||||
ret = SSL_get_shutdown(slp->ssl); | |||||
/* | |||||
* Do an SSL_shutdown() unless a close alert has | |||||
* already been sent. | |||||
*/ | |||||
if ((ret & SSL_SENT_SHUTDOWN) == 0) | |||||
SSL_shutdown(slp->ssl); | |||||
} | |||||
SSL_free(slp->ssl); | |||||
if (slp->cert != NULL) | |||||
X509_free(slp->cert); | |||||
/* | |||||
* For RPC-over-TLS, this upcall is expected | |||||
* to close off the socket. | |||||
*/ | |||||
if (!slp->shutoff) | |||||
shutdown(slp->s, SHUT_WR); | |||||
close(slp->s); | |||||
free(slp); | |||||
result->reterr = RPCTLSERR_OK; | |||||
} else | |||||
result->reterr = RPCTLSERR_NOCLOSE; | |||||
return (TRUE); | |||||
} | |||||
int | |||||
rpctlscd_1_freeresult(__unused SVCXPRT *transp, __unused xdrproc_t xdr_result, | |||||
__unused caddr_t result) | |||||
{ | |||||
return (TRUE); | |||||
} | |||||
static void | |||||
rpctlscd_terminate(int sig __unused) | |||||
{ | |||||
rpctls_syscall(RPCTLS_SYSC_CLSHUTDOWN, ""); | |||||
pidfile_remove(rpctls_pfh); | |||||
exit(0); | |||||
} | |||||
static SSL_CTX * | |||||
rpctls_setupcl_ssl(void) | |||||
{ | |||||
SSL_CTX *ctx; | |||||
long flags; | |||||
char path[PATH_MAX]; | |||||
size_t len, rlen; | |||||
int ret; | |||||
SSL_library_init(); | |||||
SSL_load_error_strings(); | |||||
OpenSSL_add_all_algorithms(); | |||||
ctx = SSL_CTX_new(TLS_client_method()); | |||||
if (ctx == NULL) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: SSL_CTX_new " | |||||
"failed\n"); | |||||
return (NULL); | |||||
} | |||||
SSL_CTX_set_ecdh_auto(ctx, 1); | |||||
if (rpctls_ciphers != NULL) { | |||||
/* | |||||
* Set preferred ciphers, since KERN_TLS only supports a | |||||
* few of them. | |||||
*/ | |||||
ret = SSL_CTX_set_cipher_list(ctx, rpctls_ciphers); | |||||
if (ret == 0) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: " | |||||
"SSL_CTX_set_cipher_list failed: %s\n", | |||||
rpctls_ciphers); | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
} | |||||
/* | |||||
* If rpctls_cert is true, a certificate and key exists in | |||||
* rpctls_certdir, so that it can do mutual authentication. | |||||
*/ | |||||
if (rpctls_cert) { | |||||
/* Get the cert.pem and certkey.pem files. */ | |||||
len = strlcpy(path, rpctls_certdir, sizeof(path)); | |||||
rlen = sizeof(path) - len; | |||||
if (strlcpy(&path[len], "cert.pem", rlen) != 8) { | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
ret = SSL_CTX_use_certificate_file(ctx, path, | |||||
SSL_FILETYPE_PEM); | |||||
if (ret != 1) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: can't use " | |||||
"certificate file path=%s ret=%d\n", path, ret); | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
if (strlcpy(&path[len], "certkey.pem", rlen) != 11) { | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
ret = SSL_CTX_use_PrivateKey_file(ctx, path, | |||||
SSL_FILETYPE_PEM); | |||||
if (ret != 1) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: Can't use " | |||||
"private key path=%s ret=%d\n", path, ret); | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
} | |||||
if (rpctls_verify_cafile != NULL || rpctls_verify_capath != NULL) { | |||||
if (rpctls_crlfile != NULL) { | |||||
ret = rpctls_loadcrlfile(ctx); | |||||
if (ret == 0) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: " | |||||
"Load CRLfile failed\n"); | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
} | |||||
#if OPENSSL_VERSION_NUMBER >= 0x30000000 | |||||
ret = 1; | |||||
if (rpctls_verify_cafile != NULL) | |||||
ret = SSL_CTX_load_verify_file(ctx, | |||||
rpctls_verify_cafile); | |||||
if (ret != 0 && rpctls_verify_capath != NULL) | |||||
ret = SSL_CTX_load_verify_dir(ctx, | |||||
rpctls_verify_capath); | |||||
#else | |||||
ret = SSL_CTX_load_verify_locations(ctx, | |||||
rpctls_verify_cafile, rpctls_verify_capath); | |||||
#endif | |||||
if (ret == 0) { | |||||
rpctls_verbose_out("rpctls_setupcl_ssl: " | |||||
"Can't load verify locations\n"); | |||||
SSL_CTX_free(ctx); | |||||
return (NULL); | |||||
} | |||||
/* | |||||
* The man page says that the | |||||
* SSL_CTX_set0_CA_list() call is not normally | |||||
* needed, but I believe it is harmless. | |||||
*/ | |||||
if (rpctls_verify_cafile != NULL) | |||||
SSL_CTX_set0_CA_list(ctx, | |||||
SSL_load_client_CA_file(rpctls_verify_cafile)); | |||||
} | |||||
/* RPC-over-TLS must use TLSv1.3, according to the IETF draft.*/ | |||||
#ifdef notyet | |||||
flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1 | | |||||
SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2; | |||||
#else | |||||
flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1_3; | |||||
#endif | |||||
SSL_CTX_set_options(ctx, flags); | |||||
SSL_CTX_clear_mode(ctx, SSL_MODE_NO_KTLS_TX | SSL_MODE_NO_KTLS_RX); | |||||
return (ctx); | |||||
} | |||||
static SSL * | |||||
rpctls_connect(SSL_CTX *ctx, int s, char *certname, u_int certlen, X509 **certp) | |||||
{ | |||||
SSL *ssl; | |||||
X509 *cert; | |||||
struct sockaddr_storage ad; | |||||
struct sockaddr *sad; | |||||
char hostnam[NI_MAXHOST], path[PATH_MAX]; | |||||
int gethostret, ret; | |||||
char *cp, *cp2; | |||||
size_t len, rlen; | |||||
long verfret; | |||||
*certp = NULL; | |||||
sad = (struct sockaddr *)&ad; | |||||
ssl = SSL_new(ctx); | |||||
if (ssl == NULL) { | |||||
rpctls_verbose_out("rpctls_connect: " | |||||
"SSL_new failed\n"); | |||||
return (NULL); | |||||
} | |||||
if (SSL_set_fd(ssl, s) != 1) { | |||||
rpctls_verbose_out("rpctls_connect: " | |||||
"SSL_set_fd failed\n"); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
/* | |||||
* If rpctls_cert is true and certname is set, a alternate certificate | |||||
* and key exists in files named <certname>.pem and <certname>key.pem | |||||
* in rpctls_certdir that is to be used for mutual authentication. | |||||
*/ | |||||
if (rpctls_cert && certlen > 0) { | |||||
len = strlcpy(path, rpctls_certdir, sizeof(path)); | |||||
rlen = sizeof(path) - len; | |||||
if (rlen <= certlen) { | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
memcpy(&path[len], certname, certlen); | |||||
rlen -= certlen; | |||||
len += certlen; | |||||
path[len] = '\0'; | |||||
if (strlcpy(&path[len], ".pem", rlen) != 4) { | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
ret = SSL_use_certificate_file(ssl, path, SSL_FILETYPE_PEM); | |||||
if (ret != 1) { | |||||
rpctls_verbose_out("rpctls_connect: can't use " | |||||
"certificate file path=%s ret=%d\n", path, ret); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
if (strlcpy(&path[len], "key.pem", rlen) != 7) { | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
ret = SSL_use_PrivateKey_file(ssl, path, SSL_FILETYPE_PEM); | |||||
if (ret != 1) { | |||||
rpctls_verbose_out("rpctls_connect: Can't use " | |||||
"private key path=%s ret=%d\n", path, ret); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
} | |||||
ret = SSL_connect(ssl); | |||||
if (ret != 1) { | |||||
rpctls_verbose_out("rpctls_connect: " | |||||
"SSL_connect failed %d\n", | |||||
ret); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
cert = SSL_get_peer_certificate(ssl); | |||||
if (cert == NULL) { | |||||
rpctls_verbose_out("rpctls_connect: get peer" | |||||
" certificate failed\n"); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
gethostret = rpctls_gethost(s, sad, hostnam, sizeof(hostnam)); | |||||
if (gethostret == 0) | |||||
hostnam[0] = '\0'; | |||||
verfret = SSL_get_verify_result(ssl); | |||||
if (verfret == X509_V_OK && (rpctls_verify_cafile != NULL || | |||||
rpctls_verify_capath != NULL) && (gethostret == 0 || | |||||
rpctls_checkhost(sad, cert, X509_CHECK_FLAG_NO_WILDCARDS) != 1)) | |||||
verfret = X509_V_ERR_HOSTNAME_MISMATCH; | |||||
if (verfret != X509_V_OK && (rpctls_verify_cafile != NULL || | |||||
rpctls_verify_capath != NULL)) { | |||||
if (verfret != X509_V_OK) { | |||||
cp = X509_NAME_oneline(X509_get_issuer_name(cert), | |||||
NULL, 0); | |||||
cp2 = X509_NAME_oneline(X509_get_subject_name(cert), | |||||
NULL, 0); | |||||
if (rpctls_debug_level == 0) | |||||
syslog(LOG_INFO | LOG_DAEMON, | |||||
"rpctls_connect: client IP %s " | |||||
"issuerName=%s subjectName=%s verify " | |||||
"failed %s\n", hostnam, cp, cp2, | |||||
X509_verify_cert_error_string(verfret)); | |||||
else | |||||
fprintf(stderr, | |||||
"rpctls_connect: client IP %s " | |||||
"issuerName=%s subjectName=%s verify " | |||||
"failed %s\n", hostnam, cp, cp2, | |||||
X509_verify_cert_error_string(verfret)); | |||||
} | |||||
X509_free(cert); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
/* Check to see if ktls is enabled on the connection. */ | |||||
ret = BIO_get_ktls_send(SSL_get_wbio(ssl)); | |||||
rpctls_verbose_out("rpctls_connect: BIO_get_ktls_send=%d\n", ret); | |||||
if (ret != 0) { | |||||
ret = BIO_get_ktls_recv(SSL_get_rbio(ssl)); | |||||
rpctls_verbose_out("rpctls_connect: BIO_get_ktls_recv=%d\n", | |||||
ret); | |||||
} | |||||
if (ret == 0) { | |||||
if (rpctls_debug_level == 0) | |||||
syslog(LOG_ERR, "ktls not working\n"); | |||||
else | |||||
fprintf(stderr, "ktls not working\n"); | |||||
X509_free(cert); | |||||
SSL_free(ssl); | |||||
return (NULL); | |||||
} | |||||
if (ret == X509_V_OK && (rpctls_verify_cafile != NULL || | |||||
rpctls_verify_capath != NULL) && rpctls_crlfile != NULL) | |||||
*certp = cert; | |||||
else | |||||
X509_free(cert); | |||||
return (ssl); | |||||
} | |||||
static void | |||||
rpctls_huphandler(int sig __unused) | |||||
{ | |||||
rpctls_gothup = true; | |||||
} |
Does anyone know what the best setting is for
SSL_CTX_set_cipher_lisr() when using KTLS?
I found the above in some example code and
it seems to work, but I have no idea if there
is a better choice?