ocsp_vfy.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* ocsp_vfy.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 2000-2004 The OpenSSL Project. 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.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <string.h>
static int ocsp_req_find_signer(X509 **psigner, OCSP_REQUEST *req, X509_NAME *nm, STACK_OF(X509) *certs,
/* Verify a basic response message */
{
int i, ret = 0;
if (!ret)
{
goto end;
}
flags |= OCSP_NOVERIFY;
if (!(flags & OCSP_NOSIGS))
{
if(ret <= 0)
{
goto end;
}
}
if (!(flags & OCSP_NOVERIFY))
{
int init_res;
if(flags & OCSP_NOCHAIN)
else
if(!init_res)
{
goto end;
}
if (ret <= 0)
{
i = X509_STORE_CTX_get_error(&ctx);
goto end;
}
if(flags & OCSP_NOCHECKS)
{
ret = 1;
goto end;
}
/* At this point we have a valid certificate chain
* need to verify it against the OCSP issuer criteria.
*/
/* If fatal error or valid match then finish */
/* Easy case: explicitly trusted. Get root CA and
* check for explicit trust
*/
{
goto end;
}
ret = 1;
}
end:
return ret;
}
{
{
return 2;
}
if(!(flags & OCSP_NOINTERN) &&
{
return 1;
}
/* Maybe lookup from store if by subject name */
return 0;
}
{
int i;
X509 *x;
/* Easy if lookup by name */
/* Lookup by key hash */
/* If key hash isn't SHA1 length then forget it */
/* Calculate hash of each key and compare */
for (i = 0; i < sk_X509_num(certs); i++)
{
x = sk_X509_value(certs, i);
return x;
}
return NULL;
}
{
int i;
if (sk_X509_num(chain) <= 0)
{
return -1;
}
/* See if the issuer IDs match. */
/* If ID mismatch or other error then return */
if (i <= 0) return i;
/* Check to see if OCSP responder CA matches request CA */
{
if (i < 0) return i;
if (i)
{
/* We have a match, if extensions OK then success */
return 0;
}
}
/* Otherwise check if OCSP request signed directly by request CA */
}
/* Check the issuer certificate IDs for equality. If there is a mismatch with the same
* algorithm then there's no point trying to match any certificates against the issuer.
* If the issuer IDs all match then we just need to check equality against one of them.
*/
{
int i, idcount;
if (idcount <= 0)
{
return -1;
}
for (i = 1; i < idcount; i++)
{
/* Check to see if IDs match */
{
/* If algoritm mismatch let caller deal with it */
return 2;
/* Else mismatch */
return 0;
}
}
/* All IDs match: only need to check one ID */
return 1;
}
{
/* If only one ID to match then do it */
if(cid)
{
int mdlen;
unsigned char md[EVP_MAX_MD_SIZE];
{
return -1;
}
return 0;
return -1;
return 0;
return 0;
return 1;
}
else
{
/* We have to match the whole lot */
int i, ret;
for (i = 0; i < sk_OCSP_SINGLERESP_num(sresp); i++)
{
}
return 1;
}
}
{
X509_check_purpose(x, -1, 0);
if ((x->ex_flags & EXFLAG_XKUSAGE) &&
(x->ex_xkusage & XKU_OCSP_SIGN))
return 1;
return 0;
}
/* Verify an OCSP request. This is fortunately much easier than OCSP
* response verify. Just find the signers certificate and verify it
* against a given trust value.
*/
int OCSP_request_verify(OCSP_REQUEST *req, STACK_OF(X509) *certs, X509_STORE *store, unsigned long flags)
{
int ret;
if (!req->optionalSignature)
{
return 0;
}
{
return 0;
}
if (ret <= 0)
{
return 0;
}
flags |= OCSP_NOVERIFY;
if (!(flags & OCSP_NOSIGS))
{
if(ret <= 0)
{
return 0;
}
}
if (!(flags & OCSP_NOVERIFY))
{
int init_res;
if(flags & OCSP_NOCHAIN)
else
if(!init_res)
{
return 0;
}
if (ret <= 0)
{
return 0;
}
}
return 1;
}
static int ocsp_req_find_signer(X509 **psigner, OCSP_REQUEST *req, X509_NAME *nm, STACK_OF(X509) *certs,
{
if(!(flags & OCSP_NOINTERN))
{
return 1;
}
if (signer)
{
return 2;
}
return 0;
}