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Code Issues Releases Wiki Activity

Curl_cert_hostcheck: strip trailing dots in host name and wildcard

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Reported-by: Richard Moore
This commit is contained in:
Daniel Stenberg 2014-03-03 11:55:23 +01:00
parent 5019c78095
commit 965690f67e
1 changed files with 42 additions and 8 deletions
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50
lib/hostcheck.c
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@ -30,6 +30,10 @@
#include "rawstr.h"
#include "inet_pton.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
/*
* Match a hostname against a wildcard pattern.
* E.g.
@ -37,9 +41,20 @@
*
* We use the matching rule described in RFC6125, section 6.4.3.
* http://tools.ietf.org/html/rfc6125#section-6.4.3
*
* In addition: ignore trailing dots in the host names and wildcards, so that
* the names are used normalized. This is what the browsers do.
*
* Do not allow wildcard matching on IP numbers. There are apparently
* certificates being used with an IP address in the CN field, thus making no
* apparent distinction between a name and an IP. We need to detect the use of
* an IP address and not wildcard match on such names.
*
* NOTE: hostmatch() gets called with copied buffers so that it can modify the
* contents at will.
*/
static int hostmatch(const char *hostname, const char *pattern)
static int hostmatch(char *hostname, char *pattern)
{
const char *pattern_label_end, *pattern_wildcard, *hostname_label_end;
int wildcard_enabled;
@ -48,6 +63,15 @@ static int hostmatch(const char *hostname, const char *pattern)
#ifdef ENABLE_IPV6
struct sockaddr_in6 si6;
#endif
/* normalize pattern and hostname by stripping off trailing dots */
size_t len = strlen(hostname);
if(hostname[len-1]=='.')
hostname[len-1]=0;
len = strlen(pattern);
if(pattern[len-1]=='.')
pattern[len-1]=0;
pattern_wildcard = strchr(pattern, '*');
if(pattern_wildcard == NULL)
return Curl_raw_equal(pattern, hostname) ?
@ -95,16 +119,26 @@ static int hostmatch(const char *hostname, const char *pattern)
int Curl_cert_hostcheck(const char *match_pattern, const char *hostname)
{
char *matchp;
char *hostp;
int res = 0;
if(!match_pattern || !*match_pattern ||
!hostname || !*hostname) /* sanity check */
return 0;
;
else {
matchp = strdup(match_pattern);
if(matchp) {
hostp = strdup(hostname);
if(hostp) {
if(hostmatch(hostp, matchp) == CURL_HOST_MATCH)
res= 1;
free(hostp);
}
free(matchp);
}
}
if(Curl_raw_equal(hostname, match_pattern)) /* trivial case */
return 1;
if(hostmatch(hostname,match_pattern) == CURL_HOST_MATCH)
return 1;
return 0;
return res;
}
#endif /* SSLEAY or AXTLS or QSOSSL or GSKIT */