| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al. |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at http://curl.haxx.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ***************************************************************************/ |
| |
| #include "curl_setup.h" |
| |
| #if defined(USE_SSLEAY) || defined(USE_AXTLS) || defined(USE_QSOSSL) || \ |
| defined(USE_GSKIT) || defined(USE_NSS) |
| /* these backends use functions from this file */ |
| |
| #include "hostcheck.h" |
| #include "rawstr.h" |
| |
| /* |
| * Match a hostname against a wildcard pattern. |
| * E.g. |
| * "foo.host.com" matches "*.host.com". |
| * |
| * We use the matching rule described in RFC6125, section 6.4.3. |
| * http://tools.ietf.org/html/rfc6125#section-6.4.3 |
| */ |
| |
| static int hostmatch(const char *hostname, const char *pattern) |
| { |
| const char *pattern_label_end, *pattern_wildcard, *hostname_label_end; |
| int wildcard_enabled; |
| size_t prefixlen, suffixlen; |
| pattern_wildcard = strchr(pattern, '*'); |
| if(pattern_wildcard == NULL) |
| return Curl_raw_equal(pattern, hostname) ? |
| CURL_HOST_MATCH : CURL_HOST_NOMATCH; |
| |
| /* We require at least 2 dots in pattern to avoid too wide wildcard |
| match. */ |
| wildcard_enabled = 1; |
| pattern_label_end = strchr(pattern, '.'); |
| if(pattern_label_end == NULL || strchr(pattern_label_end+1, '.') == NULL || |
| pattern_wildcard > pattern_label_end || |
| Curl_raw_nequal(pattern, "xn--", 4)) { |
| wildcard_enabled = 0; |
| } |
| if(!wildcard_enabled) |
| return Curl_raw_equal(pattern, hostname) ? |
| CURL_HOST_MATCH : CURL_HOST_NOMATCH; |
| |
| hostname_label_end = strchr(hostname, '.'); |
| if(hostname_label_end == NULL || |
| !Curl_raw_equal(pattern_label_end, hostname_label_end)) |
| return CURL_HOST_NOMATCH; |
| |
| /* The wildcard must match at least one character, so the left-most |
| label of the hostname is at least as large as the left-most label |
| of the pattern. */ |
| if(hostname_label_end - hostname < pattern_label_end - pattern) |
| return CURL_HOST_NOMATCH; |
| |
| prefixlen = pattern_wildcard - pattern; |
| suffixlen = pattern_label_end - (pattern_wildcard+1); |
| return Curl_raw_nequal(pattern, hostname, prefixlen) && |
| Curl_raw_nequal(pattern_wildcard+1, hostname_label_end - suffixlen, |
| suffixlen) ? |
| CURL_HOST_MATCH : CURL_HOST_NOMATCH; |
| } |
| |
| int Curl_cert_hostcheck(const char *match_pattern, const char *hostname) |
| { |
| if(!match_pattern || !*match_pattern || |
| !hostname || !*hostname) /* sanity check */ |
| return 0; |
| |
| if(Curl_raw_equal(hostname, match_pattern)) /* trivial case */ |
| return 1; |
| |
| if(hostmatch(hostname,match_pattern) == CURL_HOST_MATCH) |
| return 1; |
| return 0; |
| } |
| |
| #endif /* SSLEAY or AXTLS or QSOSSL or GSKIT or NSS */ |