diff --git a/lib/libfetch/common.c b/lib/libfetch/common.c index 41453143a11e..8ec7d018aa3d 100644 --- a/lib/libfetch/common.c +++ b/lib/libfetch/common.c @@ -1,1465 +1,1477 @@ /*- * Copyright (c) 1998-2016 Dag-Erling Smørgrav * Copyright (c) 2013 Michael Gmelin * 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 * in this position and unchanged. * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef WITH_SSL #include #endif #include "fetch.h" #include "common.h" /*** Local data **************************************************************/ /* * Error messages for resolver errors */ static struct fetcherr netdb_errlist[] = { #ifdef EAI_NODATA { EAI_NODATA, FETCH_RESOLV, "Host not found" }, #endif { EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" }, { EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" }, { EAI_NONAME, FETCH_RESOLV, "No address record" }, { -1, FETCH_UNKNOWN, "Unknown resolver error" } }; /* End-of-Line */ static const char ENDL[2] = "\r\n"; /*** Error-reporting functions ***********************************************/ /* * Map error code to string */ static struct fetcherr * fetch_finderr(struct fetcherr *p, int e) { while (p->num != -1 && p->num != e) p++; return (p); } /* * Set error code */ void fetch_seterr(struct fetcherr *p, int e) { p = fetch_finderr(p, e); fetchLastErrCode = p->cat; snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string); } /* * Set error code according to errno */ void fetch_syserr(void) { switch (errno) { case 0: fetchLastErrCode = FETCH_OK; break; case EPERM: case EACCES: case EROFS: case EAUTH: case ENEEDAUTH: fetchLastErrCode = FETCH_AUTH; break; case ENOENT: case EISDIR: /* XXX */ fetchLastErrCode = FETCH_UNAVAIL; break; case ENOMEM: fetchLastErrCode = FETCH_MEMORY; break; case EBUSY: case EAGAIN: fetchLastErrCode = FETCH_TEMP; break; case EEXIST: fetchLastErrCode = FETCH_EXISTS; break; case ENOSPC: fetchLastErrCode = FETCH_FULL; break; case EADDRINUSE: case EADDRNOTAVAIL: case ENETDOWN: case ENETUNREACH: case ENETRESET: case EHOSTUNREACH: fetchLastErrCode = FETCH_NETWORK; break; case ECONNABORTED: case ECONNRESET: fetchLastErrCode = FETCH_ABORT; break; case ETIMEDOUT: fetchLastErrCode = FETCH_TIMEOUT; break; case ECONNREFUSED: case EHOSTDOWN: fetchLastErrCode = FETCH_DOWN; break; default: fetchLastErrCode = FETCH_UNKNOWN; } snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno)); } /* * Emit status message */ void fetch_info(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); fputc('\n', stderr); } /*** Network-related utility functions ***************************************/ /* * Return the default port for a scheme */ int fetch_default_port(const char *scheme) { struct servent *se; if ((se = getservbyname(scheme, "tcp")) != NULL) return (ntohs(se->s_port)); if (strcasecmp(scheme, SCHEME_FTP) == 0) return (FTP_DEFAULT_PORT); if (strcasecmp(scheme, SCHEME_HTTP) == 0) return (HTTP_DEFAULT_PORT); return (0); } /* * Return the default proxy port for a scheme */ int fetch_default_proxy_port(const char *scheme) { if (strcasecmp(scheme, SCHEME_FTP) == 0) return (FTP_DEFAULT_PROXY_PORT); if (strcasecmp(scheme, SCHEME_HTTP) == 0) return (HTTP_DEFAULT_PROXY_PORT); return (0); } /* * Create a connection for an existing descriptor. */ conn_t * fetch_reopen(int sd) { conn_t *conn; int opt = 1; /* allocate and fill connection structure */ if ((conn = calloc(1, sizeof(*conn))) == NULL) return (NULL); fcntl(sd, F_SETFD, FD_CLOEXEC); setsockopt(sd, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof opt); conn->sd = sd; ++conn->ref; return (conn); } /* * Bump a connection's reference count. */ conn_t * fetch_ref(conn_t *conn) { ++conn->ref; return (conn); } /* * Resolve an address */ struct addrinfo * fetch_resolve(const char *addr, int port, int af) { char hbuf[256], sbuf[8]; struct addrinfo hints, *res; const char *sep, *host, *service; int err, len; /* split address if necessary */ err = EAI_SYSTEM; if ((sep = strchr(addr, ':')) != NULL) { len = snprintf(hbuf, sizeof(hbuf), "%.*s", (int)(sep - addr), addr); if (len < 0) return (NULL); if (len >= (int)sizeof(hbuf)) { errno = ENAMETOOLONG; fetch_syserr(); return (NULL); } host = hbuf; service = sep + 1; } else if (port != 0) { if (port < 1 || port > 65535) { errno = EINVAL; fetch_syserr(); return (NULL); } if (snprintf(sbuf, sizeof(sbuf), "%d", port) < 0) { fetch_syserr(); return (NULL); } host = addr; service = sbuf; } else { host = addr; service = NULL; } /* resolve */ memset(&hints, 0, sizeof(hints)); hints.ai_family = af; hints.ai_socktype = SOCK_STREAM; hints.ai_flags = AI_ADDRCONFIG; if ((err = getaddrinfo(host, service, &hints, &res)) != 0) { netdb_seterr(err); return (NULL); } return (res); } /* * Bind a socket to a specific local address */ int fetch_bind(int sd, int af, const char *addr) { struct addrinfo *cliai, *ai; int err; if ((cliai = fetch_resolve(addr, 0, af)) == NULL) return (-1); for (ai = cliai; ai != NULL; ai = ai->ai_next) if ((err = bind(sd, ai->ai_addr, ai->ai_addrlen)) == 0) break; if (err != 0) fetch_syserr(); freeaddrinfo(cliai); return (err == 0 ? 0 : -1); } /* * Establish a TCP connection to the specified port on the specified host. */ conn_t * fetch_connect(const char *host, int port, int af, int verbose) { struct addrinfo *cais = NULL, *sais = NULL, *cai, *sai; const char *bindaddr; conn_t *conn = NULL; int err = 0, sd = -1; DEBUG(fprintf(stderr, "---> %s:%d\n", host, port)); /* resolve server address */ if (verbose) fetch_info("resolving server address: %s:%d", host, port); if ((sais = fetch_resolve(host, port, af)) == NULL) goto fail; /* resolve client address */ bindaddr = getenv("FETCH_BIND_ADDRESS"); if (bindaddr != NULL && *bindaddr != '\0') { if (verbose) fetch_info("resolving client address: %s", bindaddr); if ((cais = fetch_resolve(bindaddr, 0, af)) == NULL) goto fail; } /* try each server address in turn */ for (err = 0, sai = sais; sai != NULL; sai = sai->ai_next) { /* open socket */ if ((sd = socket(sai->ai_family, SOCK_STREAM, 0)) < 0) goto syserr; /* attempt to bind to client address */ for (err = 0, cai = cais; cai != NULL; cai = cai->ai_next) { if (cai->ai_family != sai->ai_family) continue; if ((err = bind(sd, cai->ai_addr, cai->ai_addrlen)) == 0) break; } if (err != 0) { if (verbose) fetch_info("failed to bind to %s", bindaddr); goto syserr; } /* attempt to connect to server address */ if ((err = connect(sd, sai->ai_addr, sai->ai_addrlen)) == 0) break; /* clean up before next attempt */ close(sd); sd = -1; } if (err != 0) { if (verbose) fetch_info("failed to connect to %s:%s", host, port); goto syserr; } if ((conn = fetch_reopen(sd)) == NULL) goto syserr; if (cais != NULL) freeaddrinfo(cais); if (sais != NULL) freeaddrinfo(sais); return (conn); syserr: fetch_syserr(); goto fail; fail: if (sd >= 0) close(sd); if (cais != NULL) freeaddrinfo(cais); if (sais != NULL) freeaddrinfo(sais); return (NULL); } #ifdef WITH_SSL /* * Convert characters A-Z to lowercase (intentionally avoid any locale * specific conversions). */ static char fetch_ssl_tolower(char in) { if (in >= 'A' && in <= 'Z') return (in + 32); else return (in); } /* * isalpha implementation that intentionally avoids any locale specific * conversions. */ static int fetch_ssl_isalpha(char in) { return ((in >= 'A' && in <= 'Z') || (in >= 'a' && in <= 'z')); } /* * Check if passed hostnames a and b are equal. */ static int fetch_ssl_hname_equal(const char *a, size_t alen, const char *b, size_t blen) { size_t i; if (alen != blen) return (0); for (i = 0; i < alen; ++i) { if (fetch_ssl_tolower(a[i]) != fetch_ssl_tolower(b[i])) return (0); } return (1); } /* * Check if domain label is traditional, meaning that only A-Z, a-z, 0-9 * and '-' (hyphen) are allowed. Hyphens have to be surrounded by alpha- * numeric characters. Double hyphens (like they're found in IDN a-labels * 'xn--') are not allowed. Empty labels are invalid. */ static int fetch_ssl_is_trad_domain_label(const char *l, size_t len, int wcok) { size_t i; if (!len || l[0] == '-' || l[len-1] == '-') return (0); for (i = 0; i < len; ++i) { if (!isdigit(l[i]) && !fetch_ssl_isalpha(l[i]) && !(l[i] == '*' && wcok) && !(l[i] == '-' && l[i - 1] != '-')) return (0); } return (1); } /* * Check if host name consists only of numbers. This might indicate an IP * address, which is not a good idea for CN wildcard comparison. */ static int fetch_ssl_hname_is_only_numbers(const char *hostname, size_t len) { size_t i; for (i = 0; i < len; ++i) { if (!((hostname[i] >= '0' && hostname[i] <= '9') || hostname[i] == '.')) return (0); } return (1); } /* * Check if the host name h passed matches the pattern passed in m which * is usually part of subjectAltName or CN of a certificate presented to * the client. This includes wildcard matching. The algorithm is based on * RFC6125, sections 6.4.3 and 7.2, which clarifies RFC2818 and RFC3280. */ static int fetch_ssl_hname_match(const char *h, size_t hlen, const char *m, size_t mlen) { int delta, hdotidx, mdot1idx, wcidx; const char *hdot, *mdot1, *mdot2; const char *wc; /* wildcard */ if (!(h && *h && m && *m)) return (0); if ((wc = strnstr(m, "*", mlen)) == NULL) return (fetch_ssl_hname_equal(h, hlen, m, mlen)); wcidx = wc - m; /* hostname should not be just dots and numbers */ if (fetch_ssl_hname_is_only_numbers(h, hlen)) return (0); /* only one wildcard allowed in pattern */ if (strnstr(wc + 1, "*", mlen - wcidx - 1) != NULL) return (0); /* * there must be at least two more domain labels and * wildcard has to be in the leftmost label (RFC6125) */ mdot1 = strnstr(m, ".", mlen); if (mdot1 == NULL || mdot1 < wc || (mlen - (mdot1 - m)) < 4) return (0); mdot1idx = mdot1 - m; mdot2 = strnstr(mdot1 + 1, ".", mlen - mdot1idx - 1); if (mdot2 == NULL || (mlen - (mdot2 - m)) < 2) return (0); /* hostname must contain a dot and not be the 1st char */ hdot = strnstr(h, ".", hlen); if (hdot == NULL || hdot == h) return (0); hdotidx = hdot - h; /* * host part of hostname must be at least as long as * pattern it's supposed to match */ if (hdotidx < mdot1idx) return (0); /* * don't allow wildcards in non-traditional domain names * (IDN, A-label, U-label...) */ if (!fetch_ssl_is_trad_domain_label(h, hdotidx, 0) || !fetch_ssl_is_trad_domain_label(m, mdot1idx, 1)) return (0); /* match domain part (part after first dot) */ if (!fetch_ssl_hname_equal(hdot, hlen - hdotidx, mdot1, mlen - mdot1idx)) return (0); /* match part left of wildcard */ if (!fetch_ssl_hname_equal(h, wcidx, m, wcidx)) return (0); /* match part right of wildcard */ delta = mdot1idx - wcidx - 1; if (!fetch_ssl_hname_equal(hdot - delta, delta, mdot1 - delta, delta)) return (0); /* all tests succeeded, it's a match */ return (1); } /* * Get numeric host address info - returns NULL if host was not an IP * address. The caller is responsible for deallocation using * freeaddrinfo(3). */ static struct addrinfo * fetch_ssl_get_numeric_addrinfo(const char *hostname, size_t len) { struct addrinfo hints, *res; char *host; host = (char *)malloc(len + 1); memcpy(host, hostname, len); host[len] = '\0'; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = 0; hints.ai_flags = AI_NUMERICHOST; /* port is not relevant for this purpose */ if (getaddrinfo(host, "443", &hints, &res) != 0) res = NULL; free(host); return res; } /* * Compare ip address in addrinfo with address passes. */ static int fetch_ssl_ipaddr_match_bin(const struct addrinfo *lhost, const char *rhost, size_t rhostlen) { const void *left; if (lhost->ai_family == AF_INET && rhostlen == 4) { left = (void *)&((struct sockaddr_in*)(void *) lhost->ai_addr)->sin_addr.s_addr; #ifdef INET6 } else if (lhost->ai_family == AF_INET6 && rhostlen == 16) { left = (void *)&((struct sockaddr_in6 *)(void *) lhost->ai_addr)->sin6_addr; #endif } else return (0); return (!memcmp(left, (const void *)rhost, rhostlen) ? 1 : 0); } /* * Compare ip address in addrinfo with host passed. If host is not an IP * address, comparison will fail. */ static int fetch_ssl_ipaddr_match(const struct addrinfo *laddr, const char *r, size_t rlen) { struct addrinfo *raddr; int ret; char *rip; ret = 0; if ((raddr = fetch_ssl_get_numeric_addrinfo(r, rlen)) == NULL) return 0; /* not a numeric host */ if (laddr->ai_family == raddr->ai_family) { if (laddr->ai_family == AF_INET) { rip = (char *)&((struct sockaddr_in *)(void *) raddr->ai_addr)->sin_addr.s_addr; ret = fetch_ssl_ipaddr_match_bin(laddr, rip, 4); #ifdef INET6 } else if (laddr->ai_family == AF_INET6) { rip = (char *)&((struct sockaddr_in6 *)(void *) raddr->ai_addr)->sin6_addr; ret = fetch_ssl_ipaddr_match_bin(laddr, rip, 16); #endif } } freeaddrinfo(raddr); return (ret); } /* * Verify server certificate by subjectAltName. */ static int fetch_ssl_verify_altname(STACK_OF(GENERAL_NAME) *altnames, const char *host, struct addrinfo *ip) { const GENERAL_NAME *name; size_t nslen; int i; const char *ns; for (i = 0; i < sk_GENERAL_NAME_num(altnames); ++i) { #if OPENSSL_VERSION_NUMBER < 0x10000000L /* * This is a workaround, since the following line causes * alignment issues in clang: * name = sk_GENERAL_NAME_value(altnames, i); * OpenSSL explicitly warns not to use those macros * directly, but there isn't much choice (and there * shouldn't be any ill side effects) */ name = (GENERAL_NAME *)SKM_sk_value(void, altnames, i); #else name = sk_GENERAL_NAME_value(altnames, i); #endif ns = (const char *)ASN1_STRING_data(name->d.ia5); nslen = (size_t)ASN1_STRING_length(name->d.ia5); if (name->type == GEN_DNS && ip == NULL && fetch_ssl_hname_match(host, strlen(host), ns, nslen)) return (1); else if (name->type == GEN_IPADD && ip != NULL && fetch_ssl_ipaddr_match_bin(ip, ns, nslen)) return (1); } return (0); } /* * Verify server certificate by CN. */ static int fetch_ssl_verify_cn(X509_NAME *subject, const char *host, struct addrinfo *ip) { ASN1_STRING *namedata; X509_NAME_ENTRY *nameentry; int cnlen, lastpos, loc, ret; unsigned char *cn; ret = 0; lastpos = -1; loc = -1; cn = NULL; /* get most specific CN (last entry in list) and compare */ while ((lastpos = X509_NAME_get_index_by_NID(subject, NID_commonName, lastpos)) != -1) loc = lastpos; if (loc > -1) { nameentry = X509_NAME_get_entry(subject, loc); namedata = X509_NAME_ENTRY_get_data(nameentry); cnlen = ASN1_STRING_to_UTF8(&cn, namedata); if (ip == NULL && fetch_ssl_hname_match(host, strlen(host), cn, cnlen)) ret = 1; else if (ip != NULL && fetch_ssl_ipaddr_match(ip, cn, cnlen)) ret = 1; OPENSSL_free(cn); } return (ret); } /* * Verify that server certificate subjectAltName/CN matches * hostname. First check, if there are alternative subject names. If yes, * those have to match. Only if those don't exist it falls back to * checking the subject's CN. */ static int fetch_ssl_verify_hname(X509 *cert, const char *host) { struct addrinfo *ip; STACK_OF(GENERAL_NAME) *altnames; X509_NAME *subject; int ret; ret = 0; ip = fetch_ssl_get_numeric_addrinfo(host, strlen(host)); altnames = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); if (altnames != NULL) { ret = fetch_ssl_verify_altname(altnames, host, ip); } else { subject = X509_get_subject_name(cert); if (subject != NULL) ret = fetch_ssl_verify_cn(subject, host, ip); } if (ip != NULL) freeaddrinfo(ip); if (altnames != NULL) GENERAL_NAMES_free(altnames); return (ret); } /* * Configure transport security layer based on environment. */ static void fetch_ssl_setup_transport_layer(SSL_CTX *ctx, int verbose) { long ssl_ctx_options; ssl_ctx_options = SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_TICKET; if (getenv("SSL_ALLOW_SSL3") == NULL) ssl_ctx_options |= SSL_OP_NO_SSLv3; if (getenv("SSL_NO_TLS1") != NULL) ssl_ctx_options |= SSL_OP_NO_TLSv1; if (getenv("SSL_NO_TLS1_1") != NULL) ssl_ctx_options |= SSL_OP_NO_TLSv1_1; if (getenv("SSL_NO_TLS1_2") != NULL) ssl_ctx_options |= SSL_OP_NO_TLSv1_2; if (verbose) fetch_info("SSL options: %lx", ssl_ctx_options); SSL_CTX_set_options(ctx, ssl_ctx_options); } /* * Configure peer verification based on environment. */ #define LOCAL_CERT_FILE "/usr/local/etc/ssl/cert.pem" #define BASE_CERT_FILE "/etc/ssl/cert.pem" static int fetch_ssl_setup_peer_verification(SSL_CTX *ctx, int verbose) { X509_LOOKUP *crl_lookup; X509_STORE *crl_store; const char *ca_cert_file, *ca_cert_path, *crl_file; if (getenv("SSL_NO_VERIFY_PEER") == NULL) { ca_cert_file = getenv("SSL_CA_CERT_FILE"); if (ca_cert_file == NULL && access(LOCAL_CERT_FILE, R_OK) == 0) ca_cert_file = LOCAL_CERT_FILE; if (ca_cert_file == NULL && access(BASE_CERT_FILE, R_OK) == 0) ca_cert_file = BASE_CERT_FILE; ca_cert_path = getenv("SSL_CA_CERT_PATH"); if (verbose) { fetch_info("Peer verification enabled"); if (ca_cert_file != NULL) fetch_info("Using CA cert file: %s", ca_cert_file); if (ca_cert_path != NULL) fetch_info("Using CA cert path: %s", ca_cert_path); if (ca_cert_file == NULL && ca_cert_path == NULL) fetch_info("Using OpenSSL default " "CA cert file and path"); } SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, fetch_ssl_cb_verify_crt); if (ca_cert_file != NULL || ca_cert_path != NULL) SSL_CTX_load_verify_locations(ctx, ca_cert_file, ca_cert_path); else SSL_CTX_set_default_verify_paths(ctx); if ((crl_file = getenv("SSL_CRL_FILE")) != NULL) { if (verbose) fetch_info("Using CRL file: %s", crl_file); crl_store = SSL_CTX_get_cert_store(ctx); crl_lookup = X509_STORE_add_lookup(crl_store, X509_LOOKUP_file()); if (crl_lookup == NULL || !X509_load_crl_file(crl_lookup, crl_file, X509_FILETYPE_PEM)) { fprintf(stderr, "Could not load CRL file %s\n", crl_file); return (0); } X509_STORE_set_flags(crl_store, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL); } } return (1); } /* * Configure client certificate based on environment. */ static int fetch_ssl_setup_client_certificate(SSL_CTX *ctx, int verbose) { const char *client_cert_file, *client_key_file; if ((client_cert_file = getenv("SSL_CLIENT_CERT_FILE")) != NULL) { client_key_file = getenv("SSL_CLIENT_KEY_FILE") != NULL ? getenv("SSL_CLIENT_KEY_FILE") : client_cert_file; if (verbose) { fetch_info("Using client cert file: %s", client_cert_file); fetch_info("Using client key file: %s", client_key_file); } if (SSL_CTX_use_certificate_chain_file(ctx, client_cert_file) != 1) { fprintf(stderr, "Could not load client certificate %s\n", client_cert_file); return (0); } if (SSL_CTX_use_PrivateKey_file(ctx, client_key_file, SSL_FILETYPE_PEM) != 1) { fprintf(stderr, "Could not load client key %s\n", client_key_file); return (0); } } return (1); } /* * Callback for SSL certificate verification, this is called on server * cert verification. It takes no decision, but informs the user in case * verification failed. */ int fetch_ssl_cb_verify_crt(int verified, X509_STORE_CTX *ctx) { X509 *crt; X509_NAME *name; char *str; str = NULL; if (!verified) { if ((crt = X509_STORE_CTX_get_current_cert(ctx)) != NULL && (name = X509_get_subject_name(crt)) != NULL) str = X509_NAME_oneline(name, 0, 0); fprintf(stderr, "Certificate verification failed for %s\n", str != NULL ? str : "no relevant certificate"); OPENSSL_free(str); } return (verified); } #endif /* * Enable SSL on a connection. */ int fetch_ssl(conn_t *conn, const struct url *URL, int verbose) { #ifdef WITH_SSL int ret, ssl_err; X509_NAME *name; char *str; /* Init the SSL library and context */ if (!SSL_library_init()){ fprintf(stderr, "SSL library init failed\n"); return (-1); } SSL_load_error_strings(); conn->ssl_meth = SSLv23_client_method(); conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth); SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY); fetch_ssl_setup_transport_layer(conn->ssl_ctx, verbose); if (!fetch_ssl_setup_peer_verification(conn->ssl_ctx, verbose)) return (-1); if (!fetch_ssl_setup_client_certificate(conn->ssl_ctx, verbose)) return (-1); conn->ssl = SSL_new(conn->ssl_ctx); if (conn->ssl == NULL) { fprintf(stderr, "SSL context creation failed\n"); return (-1); } SSL_set_fd(conn->ssl, conn->sd); #if OPENSSL_VERSION_NUMBER >= 0x0090806fL && !defined(OPENSSL_NO_TLSEXT) if (!SSL_set_tlsext_host_name(conn->ssl, __DECONST(struct url *, URL)->host)) { fprintf(stderr, "TLS server name indication extension failed for host %s\n", URL->host); return (-1); } #endif while ((ret = SSL_connect(conn->ssl)) == -1) { ssl_err = SSL_get_error(conn->ssl, ret); if (ssl_err != SSL_ERROR_WANT_READ && ssl_err != SSL_ERROR_WANT_WRITE) { ERR_print_errors_fp(stderr); return (-1); } } conn->ssl_cert = SSL_get_peer_certificate(conn->ssl); if (conn->ssl_cert == NULL) { fprintf(stderr, "No server SSL certificate\n"); return (-1); } if (getenv("SSL_NO_VERIFY_HOSTNAME") == NULL) { if (verbose) fetch_info("Verify hostname"); if (!fetch_ssl_verify_hname(conn->ssl_cert, URL->host)) { fprintf(stderr, "SSL certificate subject doesn't match host %s\n", URL->host); return (-1); } } if (verbose) { fetch_info("%s connection established using %s", SSL_get_version(conn->ssl), SSL_get_cipher(conn->ssl)); name = X509_get_subject_name(conn->ssl_cert); str = X509_NAME_oneline(name, 0, 0); fetch_info("Certificate subject: %s", str); OPENSSL_free(str); name = X509_get_issuer_name(conn->ssl_cert); str = X509_NAME_oneline(name, 0, 0); fetch_info("Certificate issuer: %s", str); OPENSSL_free(str); } return (0); #else (void)conn; (void)verbose; fprintf(stderr, "SSL support disabled\n"); return (-1); #endif } #define FETCH_READ_WAIT -2 #define FETCH_READ_ERROR -1 #define FETCH_READ_DONE 0 #ifdef WITH_SSL static ssize_t fetch_ssl_read(SSL *ssl, char *buf, size_t len) { ssize_t rlen; int ssl_err; rlen = SSL_read(ssl, buf, len); if (rlen < 0) { ssl_err = SSL_get_error(ssl, rlen); if (ssl_err == SSL_ERROR_WANT_READ || ssl_err == SSL_ERROR_WANT_WRITE) { return (FETCH_READ_WAIT); } else { ERR_print_errors_fp(stderr); return (FETCH_READ_ERROR); } } return (rlen); } #endif static ssize_t fetch_socket_read(int sd, char *buf, size_t len) { ssize_t rlen; rlen = read(sd, buf, len); if (rlen < 0) { if (errno == EAGAIN || (errno == EINTR && fetchRestartCalls)) return (FETCH_READ_WAIT); else return (FETCH_READ_ERROR); } return (rlen); } /* * Read a character from a connection w/ timeout */ ssize_t fetch_read(conn_t *conn, char *buf, size_t len) { struct timeval now, timeout, delta; struct pollfd pfd; ssize_t rlen; int deltams; if (fetchTimeout > 0) { gettimeofday(&timeout, NULL); timeout.tv_sec += fetchTimeout; } deltams = INFTIM; memset(&pfd, 0, sizeof pfd); pfd.fd = conn->sd; pfd.events = POLLIN | POLLERR; for (;;) { /* * The socket is non-blocking. Instead of the canonical * poll() -> read(), we do the following: * * 1) call read() or SSL_read(). * 2) if we received some data, return it. * 3) if an error occurred, return -1. * 4) if read() or SSL_read() signaled EOF, return. * 5) if we did not receive any data but we're not at EOF, * call poll(). * * In the SSL case, this is necessary because if we * receive a close notification, we have to call * SSL_read() one additional time after we've read * everything we received. * * In the non-SSL case, it may improve performance (very * slightly) when reading small amounts of data. */ #ifdef WITH_SSL if (conn->ssl != NULL) rlen = fetch_ssl_read(conn->ssl, buf, len); else #endif rlen = fetch_socket_read(conn->sd, buf, len); if (rlen >= 0) { break; } else if (rlen == FETCH_READ_ERROR) { fetch_syserr(); return (-1); } // assert(rlen == FETCH_READ_WAIT); if (fetchTimeout > 0) { gettimeofday(&now, NULL); if (!timercmp(&timeout, &now, >)) { errno = ETIMEDOUT; fetch_syserr(); return (-1); } timersub(&timeout, &now, &delta); deltams = delta.tv_sec * 1000 + delta.tv_usec / 1000;; } errno = 0; pfd.revents = 0; if (poll(&pfd, 1, deltams) < 0) { if (errno == EINTR && fetchRestartCalls) continue; fetch_syserr(); return (-1); } } return (rlen); } /* * Read a line of text from a connection w/ timeout */ #define MIN_BUF_SIZE 1024 int fetch_getln(conn_t *conn) { char *tmp; size_t tmpsize; ssize_t len; char c; if (conn->buf == NULL) { if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) { errno = ENOMEM; return (-1); } conn->bufsize = MIN_BUF_SIZE; } conn->buf[0] = '\0'; conn->buflen = 0; do { len = fetch_read(conn, &c, 1); if (len == -1) return (-1); if (len == 0) break; conn->buf[conn->buflen++] = c; if (conn->buflen == conn->bufsize) { tmp = conn->buf; tmpsize = conn->bufsize * 2 + 1; if ((tmp = realloc(tmp, tmpsize)) == NULL) { errno = ENOMEM; return (-1); } conn->buf = tmp; conn->bufsize = tmpsize; } } while (c != '\n'); conn->buf[conn->buflen] = '\0'; DEBUG(fprintf(stderr, "<<< %s", conn->buf)); return (0); } /* * Write to a connection w/ timeout */ ssize_t fetch_write(conn_t *conn, const char *buf, size_t len) { struct iovec iov; iov.iov_base = __DECONST(char *, buf); iov.iov_len = len; return fetch_writev(conn, &iov, 1); } /* * Write a vector to a connection w/ timeout * Note: can modify the iovec. */ ssize_t fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt) { struct timeval now, timeout, delta; struct pollfd pfd; ssize_t wlen, total; int deltams; memset(&pfd, 0, sizeof pfd); if (fetchTimeout) { pfd.fd = conn->sd; pfd.events = POLLOUT | POLLERR; gettimeofday(&timeout, NULL); timeout.tv_sec += fetchTimeout; } total = 0; while (iovcnt > 0) { while (fetchTimeout && pfd.revents == 0) { gettimeofday(&now, NULL); if (!timercmp(&timeout, &now, >)) { errno = ETIMEDOUT; fetch_syserr(); return (-1); } timersub(&timeout, &now, &delta); deltams = delta.tv_sec * 1000 + delta.tv_usec / 1000; errno = 0; pfd.revents = 0; if (poll(&pfd, 1, deltams) < 0) { /* POSIX compliance */ if (errno == EAGAIN) continue; if (errno == EINTR && fetchRestartCalls) continue; return (-1); } } errno = 0; #ifdef WITH_SSL if (conn->ssl != NULL) wlen = SSL_write(conn->ssl, iov->iov_base, iov->iov_len); else #endif wlen = writev(conn->sd, iov, iovcnt); if (wlen == 0) { /* we consider a short write a failure */ /* XXX perhaps we shouldn't in the SSL case */ errno = EPIPE; fetch_syserr(); return (-1); } if (wlen < 0) { if (errno == EINTR && fetchRestartCalls) continue; return (-1); } total += wlen; while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) { wlen -= iov->iov_len; iov++; iovcnt--; } if (iovcnt > 0) { iov->iov_len -= wlen; iov->iov_base = __DECONST(char *, iov->iov_base) + wlen; } } return (total); } /* * Write a line of text to a connection w/ timeout */ int fetch_putln(conn_t *conn, const char *str, size_t len) { struct iovec iov[2]; int ret; DEBUG(fprintf(stderr, ">>> %s\n", str)); iov[0].iov_base = __DECONST(char *, str); iov[0].iov_len = len; iov[1].iov_base = __DECONST(char *, ENDL); iov[1].iov_len = sizeof(ENDL); if (len == 0) ret = fetch_writev(conn, &iov[1], 1); else ret = fetch_writev(conn, iov, 2); if (ret == -1) return (-1); return (0); } /* * Close connection */ int fetch_close(conn_t *conn) { int ret; if (--conn->ref > 0) return (0); #ifdef WITH_SSL if (conn->ssl) { SSL_shutdown(conn->ssl); SSL_set_connect_state(conn->ssl); SSL_free(conn->ssl); conn->ssl = NULL; } if (conn->ssl_ctx) { SSL_CTX_free(conn->ssl_ctx); conn->ssl_ctx = NULL; } if (conn->ssl_cert) { X509_free(conn->ssl_cert); conn->ssl_cert = NULL; } #endif ret = close(conn->sd); free(conn->buf); free(conn); return (ret); } /*** Directory-related utility functions *************************************/ int fetch_add_entry(struct url_ent **p, int *size, int *len, const char *name, struct url_stat *us) { struct url_ent *tmp; if (*p == NULL) { *size = 0; *len = 0; } if (*len >= *size - 1) { tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p)); if (tmp == NULL) { errno = ENOMEM; fetch_syserr(); return (-1); } *size = (*size * 2 + 1); *p = tmp; } tmp = *p + *len; snprintf(tmp->name, PATH_MAX, "%s", name); memcpy(&tmp->stat, us, sizeof(*us)); (*len)++; (++tmp)->name[0] = 0; return (0); } /*** Authentication-related utility functions ********************************/ static const char * fetch_read_word(FILE *f) { static char word[1024]; if (fscanf(f, " %1023s ", word) != 1) return (NULL); return (word); } -/* - * Get authentication data for a URL from .netrc - */ -int -fetch_netrc_auth(struct url *url) +static int +fetch_netrc_open(void) { + const char *p; char fn[PATH_MAX]; - const char *word; - char *p; - FILE *f; if ((p = getenv("NETRC")) != NULL) { if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) { fetch_info("$NETRC specifies a file name " "longer than PATH_MAX"); return (-1); } } else { if ((p = getenv("HOME")) != NULL) { struct passwd *pwd; if ((pwd = getpwuid(getuid())) == NULL || (p = pwd->pw_dir) == NULL) return (-1); } if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn)) return (-1); } - if ((f = fopen(fn, "r")) == NULL) + return (open(fn, O_RDONLY)); +} + +/* + * Get authentication data for a URL from .netrc + */ +int +fetch_netrc_auth(struct url *url) +{ + const char *word; + FILE *f; + + if (url->netrcfd == -2) + url->netrcfd = fetch_netrc_open(); + if (url->netrcfd < 0) + return (-1); + if ((f = fdopen(url->netrcfd, "r")) == NULL) return (-1); + rewind(f); while ((word = fetch_read_word(f)) != NULL) { if (strcmp(word, "default") == 0) { DEBUG(fetch_info("Using default .netrc settings")); break; } if (strcmp(word, "machine") == 0 && (word = fetch_read_word(f)) != NULL && strcasecmp(word, url->host) == 0) { DEBUG(fetch_info("Using .netrc settings for %s", word)); break; } } if (word == NULL) goto ferr; while ((word = fetch_read_word(f)) != NULL) { if (strcmp(word, "login") == 0) { if ((word = fetch_read_word(f)) == NULL) goto ferr; if (snprintf(url->user, sizeof(url->user), "%s", word) > (int)sizeof(url->user)) { fetch_info("login name in .netrc is too long"); url->user[0] = '\0'; } } else if (strcmp(word, "password") == 0) { if ((word = fetch_read_word(f)) == NULL) goto ferr; if (snprintf(url->pwd, sizeof(url->pwd), "%s", word) > (int)sizeof(url->pwd)) { fetch_info("password in .netrc is too long"); url->pwd[0] = '\0'; } } else if (strcmp(word, "account") == 0) { if ((word = fetch_read_word(f)) == NULL) goto ferr; /* XXX not supported! */ } else { break; } } fclose(f); return (0); ferr: fclose(f); return (-1); } /* * The no_proxy environment variable specifies a set of domains for * which the proxy should not be consulted; the contents is a comma-, * or space-separated list of domain names. A single asterisk will * override all proxy variables and no transactions will be proxied * (for compatibility with lynx and curl, see the discussion at * ). */ int fetch_no_proxy_match(const char *host) { const char *no_proxy, *p, *q; size_t h_len, d_len; if ((no_proxy = getenv("NO_PROXY")) == NULL && (no_proxy = getenv("no_proxy")) == NULL) return (0); /* asterisk matches any hostname */ if (strcmp(no_proxy, "*") == 0) return (1); h_len = strlen(host); p = no_proxy; do { /* position p at the beginning of a domain suffix */ while (*p == ',' || isspace((unsigned char)*p)) p++; /* position q at the first separator character */ for (q = p; *q; ++q) if (*q == ',' || isspace((unsigned char)*q)) break; d_len = q - p; if (d_len > 0 && h_len >= d_len && strncasecmp(host + h_len - d_len, p, d_len) == 0) { /* domain name matches */ return (1); } p = q + 1; } while (*q); return (0); } diff --git a/lib/libfetch/fetch.c b/lib/libfetch/fetch.c index 8d92bbcb7808..6b3148ebe27f 100644 --- a/lib/libfetch/fetch.c +++ b/lib/libfetch/fetch.c @@ -1,469 +1,470 @@ /*- * Copyright (c) 1998-2004 Dag-Erling Smørgrav * 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 * in this position and unchanged. * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include "fetch.h" #include "common.h" auth_t fetchAuthMethod; int fetchLastErrCode; char fetchLastErrString[MAXERRSTRING]; int fetchTimeout; int fetchRestartCalls = 1; int fetchDebug; /*** Local data **************************************************************/ /* * Error messages for parser errors */ #define URL_MALFORMED 1 #define URL_BAD_SCHEME 2 #define URL_BAD_PORT 3 static struct fetcherr url_errlist[] = { { URL_MALFORMED, FETCH_URL, "Malformed URL" }, { URL_BAD_SCHEME, FETCH_URL, "Invalid URL scheme" }, { URL_BAD_PORT, FETCH_URL, "Invalid server port" }, { -1, FETCH_UNKNOWN, "Unknown parser error" } }; /*** Public API **************************************************************/ /* * Select the appropriate protocol for the URL scheme, and return a * read-only stream connected to the document referenced by the URL. * Also fill out the struct url_stat. */ FILE * fetchXGet(struct url *URL, struct url_stat *us, const char *flags) { if (us != NULL) { us->size = -1; us->atime = us->mtime = 0; } if (strcasecmp(URL->scheme, SCHEME_FILE) == 0) return (fetchXGetFile(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) return (fetchXGetFTP(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0) return (fetchXGetHTTP(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0) return (fetchXGetHTTP(URL, us, flags)); url_seterr(URL_BAD_SCHEME); return (NULL); } /* * Select the appropriate protocol for the URL scheme, and return a * read-only stream connected to the document referenced by the URL. */ FILE * fetchGet(struct url *URL, const char *flags) { return (fetchXGet(URL, NULL, flags)); } /* * Select the appropriate protocol for the URL scheme, and return a * write-only stream connected to the document referenced by the URL. */ FILE * fetchPut(struct url *URL, const char *flags) { if (strcasecmp(URL->scheme, SCHEME_FILE) == 0) return (fetchPutFile(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) return (fetchPutFTP(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0) return (fetchPutHTTP(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0) return (fetchPutHTTP(URL, flags)); url_seterr(URL_BAD_SCHEME); return (NULL); } /* * Select the appropriate protocol for the URL scheme, and return the * size of the document referenced by the URL if it exists. */ int fetchStat(struct url *URL, struct url_stat *us, const char *flags) { if (us != NULL) { us->size = -1; us->atime = us->mtime = 0; } if (strcasecmp(URL->scheme, SCHEME_FILE) == 0) return (fetchStatFile(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) return (fetchStatFTP(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0) return (fetchStatHTTP(URL, us, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0) return (fetchStatHTTP(URL, us, flags)); url_seterr(URL_BAD_SCHEME); return (-1); } /* * Select the appropriate protocol for the URL scheme, and return a * list of files in the directory pointed to by the URL. */ struct url_ent * fetchList(struct url *URL, const char *flags) { if (strcasecmp(URL->scheme, SCHEME_FILE) == 0) return (fetchListFile(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) return (fetchListFTP(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0) return (fetchListHTTP(URL, flags)); else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0) return (fetchListHTTP(URL, flags)); url_seterr(URL_BAD_SCHEME); return (NULL); } /* * Attempt to parse the given URL; if successful, call fetchXGet(). */ FILE * fetchXGetURL(const char *URL, struct url_stat *us, const char *flags) { struct url *u; FILE *f; if ((u = fetchParseURL(URL)) == NULL) return (NULL); f = fetchXGet(u, us, flags); fetchFreeURL(u); return (f); } /* * Attempt to parse the given URL; if successful, call fetchGet(). */ FILE * fetchGetURL(const char *URL, const char *flags) { return (fetchXGetURL(URL, NULL, flags)); } /* * Attempt to parse the given URL; if successful, call fetchPut(). */ FILE * fetchPutURL(const char *URL, const char *flags) { struct url *u; FILE *f; if ((u = fetchParseURL(URL)) == NULL) return (NULL); f = fetchPut(u, flags); fetchFreeURL(u); return (f); } /* * Attempt to parse the given URL; if successful, call fetchStat(). */ int fetchStatURL(const char *URL, struct url_stat *us, const char *flags) { struct url *u; int s; if ((u = fetchParseURL(URL)) == NULL) return (-1); s = fetchStat(u, us, flags); fetchFreeURL(u); return (s); } /* * Attempt to parse the given URL; if successful, call fetchList(). */ struct url_ent * fetchListURL(const char *URL, const char *flags) { struct url *u; struct url_ent *ue; if ((u = fetchParseURL(URL)) == NULL) return (NULL); ue = fetchList(u, flags); fetchFreeURL(u); return (ue); } /* * Make a URL */ struct url * fetchMakeURL(const char *scheme, const char *host, int port, const char *doc, const char *user, const char *pwd) { struct url *u; if (!scheme || (!host && !doc)) { url_seterr(URL_MALFORMED); return (NULL); } if (port < 0 || port > 65535) { url_seterr(URL_BAD_PORT); return (NULL); } /* allocate struct url */ if ((u = calloc(1, sizeof(*u))) == NULL) { fetch_syserr(); return (NULL); } if ((u->doc = strdup(doc ? doc : "/")) == NULL) { fetch_syserr(); free(u); return (NULL); } #define seturl(x) snprintf(u->x, sizeof(u->x), "%s", x) seturl(scheme); seturl(host); seturl(user); seturl(pwd); #undef seturl u->port = port; + u->netrcfd = -2; return (u); } /* * Return value of the given hex digit. */ static int fetch_hexval(char ch) { if (ch >= '0' && ch <= '9') return (ch - '0'); else if (ch >= 'a' && ch <= 'f') return (ch - 'a' + 10); else if (ch >= 'A' && ch <= 'F') return (ch - 'A' + 10); return (-1); } /* * Decode percent-encoded URL component from src into dst, stopping at end * of string, or at @ or : separators. Returns a pointer to the unhandled * part of the input string (null terminator, @, or :). No terminator is * written to dst (it is the caller's responsibility). */ static const char * fetch_pctdecode(char *dst, const char *src, size_t dlen) { int d1, d2; char c; const char *s; for (s = src; *s != '\0' && *s != '@' && *s != ':'; s++) { if (s[0] == '%' && (d1 = fetch_hexval(s[1])) >= 0 && (d2 = fetch_hexval(s[2])) >= 0 && (d1 > 0 || d2 > 0)) { c = d1 << 4 | d2; s += 2; } else { c = *s; } if (dlen-- > 0) *dst++ = c; } return (s); } /* * Split an URL into components. URL syntax is: * [method:/][/[user[:pwd]@]host[:port]/][document] * This almost, but not quite, RFC1738 URL syntax. */ struct url * fetchParseURL(const char *URL) { char *doc; const char *p, *q; struct url *u; int i; /* allocate struct url */ if ((u = calloc(1, sizeof(*u))) == NULL) { fetch_syserr(); return (NULL); } /* scheme name */ if ((p = strstr(URL, ":/"))) { snprintf(u->scheme, URL_SCHEMELEN+1, "%.*s", (int)(p - URL), URL); URL = ++p; /* * Only one slash: no host, leave slash as part of document * Two slashes: host follows, strip slashes */ if (URL[1] == '/') URL = (p += 2); } else { p = URL; } if (!*URL || *URL == '/' || *URL == '.' || (u->scheme[0] == '\0' && strchr(URL, '/') == NULL && strchr(URL, ':') == NULL)) goto nohost; p = strpbrk(URL, "/@"); if (p && *p == '@') { /* username */ q = fetch_pctdecode(u->user, URL, URL_USERLEN); /* password */ if (*q == ':') q = fetch_pctdecode(u->pwd, q + 1, URL_PWDLEN); p++; } else { p = URL; } /* hostname */ #ifdef INET6 if (*p == '[' && (q = strchr(p + 1, ']')) != NULL && (*++q == '\0' || *q == '/' || *q == ':')) { if ((i = q - p - 2) > MAXHOSTNAMELEN) i = MAXHOSTNAMELEN; strncpy(u->host, ++p, i); p = q; } else #endif for (i = 0; *p && (*p != '/') && (*p != ':'); p++) if (i < MAXHOSTNAMELEN) u->host[i++] = *p; /* port */ if (*p == ':') { for (q = ++p; *q && (*q != '/'); q++) if (isdigit((unsigned char)*q)) u->port = u->port * 10 + (*q - '0'); else { /* invalid port */ url_seterr(URL_BAD_PORT); goto ouch; } p = q; } nohost: /* document */ if (!*p) p = "/"; if (strcasecmp(u->scheme, SCHEME_HTTP) == 0 || strcasecmp(u->scheme, SCHEME_HTTPS) == 0) { const char hexnums[] = "0123456789abcdef"; /* percent-escape whitespace. */ if ((doc = malloc(strlen(p) * 3 + 1)) == NULL) { fetch_syserr(); goto ouch; } u->doc = doc; while (*p != '\0') { if (!isspace((unsigned char)*p)) { *doc++ = *p++; } else { *doc++ = '%'; *doc++ = hexnums[((unsigned int)*p) >> 4]; *doc++ = hexnums[((unsigned int)*p) & 0xf]; p++; } } *doc = '\0'; } else if ((u->doc = strdup(p)) == NULL) { fetch_syserr(); goto ouch; } DEBUG(fprintf(stderr, "scheme: [%s]\n" "user: [%s]\n" "password: [%s]\n" "host: [%s]\n" "port: [%d]\n" "document: [%s]\n", u->scheme, u->user, u->pwd, u->host, u->port, u->doc)); return (u); ouch: free(u); return (NULL); } /* * Free a URL */ void fetchFreeURL(struct url *u) { free(u->doc); free(u); } diff --git a/lib/libfetch/fetch.h b/lib/libfetch/fetch.h index d56a1036a462..319fca92b847 100644 --- a/lib/libfetch/fetch.h +++ b/lib/libfetch/fetch.h @@ -1,153 +1,154 @@ /*- * Copyright (c) 1998-2004 Dag-Erling Smørgrav * 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 * in this position and unchanged. * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * 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. * * $FreeBSD$ */ #ifndef _FETCH_H_INCLUDED #define _FETCH_H_INCLUDED #define _LIBFETCH_VER "libfetch/2.0" #define URL_SCHEMELEN 16 #define URL_USERLEN 256 #define URL_PWDLEN 256 struct url { char scheme[URL_SCHEMELEN+1]; char user[URL_USERLEN+1]; char pwd[URL_PWDLEN+1]; char host[MAXHOSTNAMELEN+1]; int port; char *doc; off_t offset; size_t length; time_t ims_time; + int netrcfd; }; struct url_stat { off_t size; time_t atime; time_t mtime; }; struct url_ent { char name[PATH_MAX]; struct url_stat stat; }; /* Recognized schemes */ #define SCHEME_FTP "ftp" #define SCHEME_HTTP "http" #define SCHEME_HTTPS "https" #define SCHEME_FILE "file" /* Error codes */ #define FETCH_ABORT 1 #define FETCH_AUTH 2 #define FETCH_DOWN 3 #define FETCH_EXISTS 4 #define FETCH_FULL 5 #define FETCH_INFO 6 #define FETCH_MEMORY 7 #define FETCH_MOVED 8 #define FETCH_NETWORK 9 #define FETCH_OK 10 #define FETCH_PROTO 11 #define FETCH_RESOLV 12 #define FETCH_SERVER 13 #define FETCH_TEMP 14 #define FETCH_TIMEOUT 15 #define FETCH_UNAVAIL 16 #define FETCH_UNKNOWN 17 #define FETCH_URL 18 #define FETCH_VERBOSE 19 __BEGIN_DECLS /* FILE-specific functions */ FILE *fetchXGetFile(struct url *, struct url_stat *, const char *); FILE *fetchGetFile(struct url *, const char *); FILE *fetchPutFile(struct url *, const char *); int fetchStatFile(struct url *, struct url_stat *, const char *); struct url_ent *fetchListFile(struct url *, const char *); /* HTTP-specific functions */ FILE *fetchXGetHTTP(struct url *, struct url_stat *, const char *); FILE *fetchGetHTTP(struct url *, const char *); FILE *fetchPutHTTP(struct url *, const char *); int fetchStatHTTP(struct url *, struct url_stat *, const char *); struct url_ent *fetchListHTTP(struct url *, const char *); FILE *fetchReqHTTP(struct url *, const char *, const char *, const char *, const char *); /* FTP-specific functions */ FILE *fetchXGetFTP(struct url *, struct url_stat *, const char *); FILE *fetchGetFTP(struct url *, const char *); FILE *fetchPutFTP(struct url *, const char *); int fetchStatFTP(struct url *, struct url_stat *, const char *); struct url_ent *fetchListFTP(struct url *, const char *); /* Generic functions */ FILE *fetchXGetURL(const char *, struct url_stat *, const char *); FILE *fetchGetURL(const char *, const char *); FILE *fetchPutURL(const char *, const char *); int fetchStatURL(const char *, struct url_stat *, const char *); struct url_ent *fetchListURL(const char *, const char *); FILE *fetchXGet(struct url *, struct url_stat *, const char *); FILE *fetchGet(struct url *, const char *); FILE *fetchPut(struct url *, const char *); int fetchStat(struct url *, struct url_stat *, const char *); struct url_ent *fetchList(struct url *, const char *); /* URL parsing */ struct url *fetchMakeURL(const char *, const char *, int, const char *, const char *, const char *); struct url *fetchParseURL(const char *); void fetchFreeURL(struct url *); __END_DECLS /* Authentication */ typedef int (*auth_t)(struct url *); extern auth_t fetchAuthMethod; /* Last error code */ extern int fetchLastErrCode; #define MAXERRSTRING 256 extern char fetchLastErrString[MAXERRSTRING]; /* I/O timeout */ extern int fetchTimeout; /* Restart interrupted syscalls */ extern int fetchRestartCalls; /* Extra verbosity */ extern int fetchDebug; #endif