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crypt32: Only compare the hostname portion of a URL when checking against a name constraint.

This commit is contained in:
Juan Lang 2009-11-13 17:44:42 -08:00 committed by Alexandre Julliard
parent 3c8a04f12f
commit e82005fe2d
1 changed files with 51 additions and 7 deletions
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54
dlls/crypt32/chain.c
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@ -517,14 +517,58 @@ static BOOL url_matches(LPCWSTR constraint, LPCWSTR name,
*trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
else if (!name)
; /* no match */
else if (constraint[0] == '.')
else
{
if (lstrlenW(name) > lstrlenW(constraint))
match = !lstrcmpiW(name + lstrlenW(name) - lstrlenW(constraint),
constraint);
LPCWSTR colon, authority_end, at, hostname = NULL;
/* The maximum length for a hostname is 254 in the DNS, see RFC 1034 */
WCHAR hostname_buf[255];
/* RFC 5280: only the hostname portion of the URL is compared. From
* section 4.2.1.10:
* "For URIs, the constraint applies to the host part of the name.
* The constraint MUST be specified as a fully qualified domain name
* and MAY specify a host or a domain."
* The format for URIs is in RFC 2396.
*
* First, remove any scheme that's present. */
colon = strchrW(name, ':');
if (colon && *(colon + 1) == '/' && *(colon + 2) == '/')
name = colon + 3;
/* Next, find the end of the authority component. (The authority is
* generally just the hostname, but it may contain a username or a port.
* Those are removed next.)
*/
authority_end = strchrW(name, '/');
if (!authority_end)
authority_end = strchrW(name, '?');
if (!authority_end)
authority_end = name + strlenW(name);
/* Remove any port number from the authority */
for (colon = authority_end; colon >= name && *colon != ':'; colon--)
;
if (*colon == ':')
authority_end = colon;
/* Remove any username from the authority */
if ((at = strchrW(name, '@')))
name = at;
/* Ignore any path or query portion of the URL. */
if (*authority_end)
{
if (authority_end - name < sizeof(hostname_buf) /
sizeof(hostname_buf[0]))
{
memcpy(hostname_buf, name,
(authority_end - name) * sizeof(WCHAR));
hostname_buf[authority_end - name] = 0;
hostname = hostname_buf;
}
/* else: Hostname is too long, not a match */
}
else
match = !lstrcmpiW(constraint, name);
hostname = name;
if (hostname)
match = !lstrcmpiW(constraint, hostname);
}
return match;
}