ref: 39f18c9d88f52a22373790dec5721fa3521d3f00
dir: /sys/src/ape/lib/openssl/crypto/ocsp/ocsp_cl.c/
/* ocsp_cl.c */
/* Written by Tom Titchener <[email protected]> for the OpenSSL
* project. */
/* History:
This file was transfered to Richard Levitte from CertCo by Kathy
Weinhold in mid-spring 2000 to be included in OpenSSL or released
as a patch kit. */
/* ====================================================================
* Copyright (c) 1998-2000 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
* the documentation and/or other materials provided with the
* 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
* [email protected].
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <stdio.h>
#include <time.h>
#include <cryptlib.h>
#include <openssl/objects.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/ocsp.h>
/* Utility functions related to sending OCSP requests and extracting
* relevant information from the response.
*/
/* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ
* pointer: useful if we want to add extensions.
*/
OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
{
OCSP_ONEREQ *one = NULL;
if (!(one = OCSP_ONEREQ_new())) goto err;
if (one->reqCert) OCSP_CERTID_free(one->reqCert);
one->reqCert = cid;
if (req &&
!sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
goto err;
return one;
err:
OCSP_ONEREQ_free(one);
return NULL;
}
/* Set requestorName from an X509_NAME structure */
int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
{
GENERAL_NAME *gen;
gen = GENERAL_NAME_new();
if (gen == NULL)
return 0;
if (!X509_NAME_set(&gen->d.directoryName, nm))
{
GENERAL_NAME_free(gen);
return 0;
}
gen->type = GEN_DIRNAME;
if (req->tbsRequest->requestorName)
GENERAL_NAME_free(req->tbsRequest->requestorName);
req->tbsRequest->requestorName = gen;
return 1;
}
/* Add a certificate to an OCSP request */
int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
{
OCSP_SIGNATURE *sig;
if (!req->optionalSignature)
req->optionalSignature = OCSP_SIGNATURE_new();
sig = req->optionalSignature;
if (!sig) return 0;
if (!cert) return 1;
if (!sig->certs && !(sig->certs = sk_X509_new_null()))
return 0;
if(!sk_X509_push(sig->certs, cert)) return 0;
CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
return 1;
}
/* Sign an OCSP request set the requestorName to the subjec
* name of an optional signers certificate and include one
* or more optional certificates in the request. Behaves
* like PKCS7_sign().
*/
int OCSP_request_sign(OCSP_REQUEST *req,
X509 *signer,
EVP_PKEY *key,
const EVP_MD *dgst,
STACK_OF(X509) *certs,
unsigned long flags)
{
int i;
OCSP_SIGNATURE *sig;
X509 *x;
if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
goto err;
if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err;
if (!dgst) dgst = EVP_sha1();
if (key)
{
if (!X509_check_private_key(signer, key))
{
OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
goto err;
}
if (!OCSP_REQUEST_sign(req, key, dgst)) goto err;
}
if (!(flags & OCSP_NOCERTS))
{
if(!OCSP_request_add1_cert(req, signer)) goto err;
for (i = 0; i < sk_X509_num(certs); i++)
{
x = sk_X509_value(certs, i);
if (!OCSP_request_add1_cert(req, x)) goto err;
}
}
return 1;
err:
OCSP_SIGNATURE_free(req->optionalSignature);
req->optionalSignature = NULL;
return 0;
}
/* Get response status */
int OCSP_response_status(OCSP_RESPONSE *resp)
{
return ASN1_ENUMERATED_get(resp->responseStatus);
}
/* Extract basic response from OCSP_RESPONSE or NULL if
* no basic response present.
*/
OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp)
{
OCSP_RESPBYTES *rb;
rb = resp->responseBytes;
if (!rb)
{
OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA);
return NULL;
}
if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic)
{
OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE);
return NULL;
}
return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
}
/* Return number of OCSP_SINGLERESP reponses present in
* a basic response.
*/
int OCSP_resp_count(OCSP_BASICRESP *bs)
{
if (!bs) return -1;
return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
}
/* Extract an OCSP_SINGLERESP response with a given index */
OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
{
if (!bs) return NULL;
return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
}
/* Look single response matching a given certificate ID */
int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
{
int i;
STACK_OF(OCSP_SINGLERESP) *sresp;
OCSP_SINGLERESP *single;
if (!bs) return -1;
if (last < 0) last = 0;
else last++;
sresp = bs->tbsResponseData->responses;
for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++)
{
single = sk_OCSP_SINGLERESP_value(sresp, i);
if (!OCSP_id_cmp(id, single->certId)) return i;
}
return -1;
}
/* Extract status information from an OCSP_SINGLERESP structure.
* Note: the revtime and reason values are only set if the
* certificate status is revoked. Returns numerical value of
* status.
*/
int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
ASN1_GENERALIZEDTIME **revtime,
ASN1_GENERALIZEDTIME **thisupd,
ASN1_GENERALIZEDTIME **nextupd)
{
int ret;
OCSP_CERTSTATUS *cst;
if(!single) return -1;
cst = single->certStatus;
ret = cst->type;
if (ret == V_OCSP_CERTSTATUS_REVOKED)
{
OCSP_REVOKEDINFO *rev = cst->value.revoked;
if (revtime) *revtime = rev->revocationTime;
if (reason)
{
if(rev->revocationReason)
*reason = ASN1_ENUMERATED_get(rev->revocationReason);
else *reason = -1;
}
}
if(thisupd) *thisupd = single->thisUpdate;
if(nextupd) *nextupd = single->nextUpdate;
return ret;
}
/* This function combines the previous ones: look up a certificate ID and
* if found extract status information. Return 0 is successful.
*/
int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
int *reason,
ASN1_GENERALIZEDTIME **revtime,
ASN1_GENERALIZEDTIME **thisupd,
ASN1_GENERALIZEDTIME **nextupd)
{
int i;
OCSP_SINGLERESP *single;
i = OCSP_resp_find(bs, id, -1);
/* Maybe check for multiple responses and give an error? */
if(i < 0) return 0;
single = OCSP_resp_get0(bs, i);
i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
if(status) *status = i;
return 1;
}
/* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
* take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
* rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
* Also to avoid accepting very old responses without a nextUpdate field an optional maxage
* parameter specifies the maximum age the thisUpdate field can be.
*/
int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
{
int ret = 1;
time_t t_now, t_tmp;
time(&t_now);
/* Check thisUpdate is valid and not more than nsec in the future */
if (!ASN1_GENERALIZEDTIME_check(thisupd))
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD);
ret = 0;
}
else
{
t_tmp = t_now + nsec;
if (X509_cmp_time(thisupd, &t_tmp) > 0)
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID);
ret = 0;
}
/* If maxsec specified check thisUpdate is not more than maxsec in the past */
if (maxsec >= 0)
{
t_tmp = t_now - maxsec;
if (X509_cmp_time(thisupd, &t_tmp) < 0)
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD);
ret = 0;
}
}
}
if (!nextupd) return ret;
/* Check nextUpdate is valid and not more than nsec in the past */
if (!ASN1_GENERALIZEDTIME_check(nextupd))
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
ret = 0;
}
else
{
t_tmp = t_now - nsec;
if (X509_cmp_time(nextupd, &t_tmp) < 0)
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED);
ret = 0;
}
}
/* Also don't allow nextUpdate to precede thisUpdate */
if (ASN1_STRING_cmp(nextupd, thisupd) < 0)
{
OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
ret = 0;
}
return ret;
}