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- /***************************************************************************
- * _ _ ____ _
- * 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)
- /* 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 */
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