[thirdparty/openssl.git] / crypto / ocsp / ocsp_cl.c

/* ocsp_cl.c */
/*
 * Written by Tom Titchener <Tom_Titchener@groove.net> 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
 *    openssl-core@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 <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;
}
Commit	Line	Data
0b33bc65	1	/* ocsp_cl.c */
40720ce3 MC	2	/*
	3	* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
	4	* project.
	5	*/
0b33bc65	6
40720ce3 MC	7	/*
	8	* History: This file was transfered to Richard Levitte from CertCo by Kathy
	9	* Weinhold in mid-spring 2000 to be included in OpenSSL or released as a
	10	* patch kit.
	11	*/
0b33bc65 DSH	12
	13	/* ====================================================================
	14	* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
	15	*
	16	* Redistribution and use in source and binary forms, with or without
	17	* modification, are permitted provided that the following conditions
	18	* are met:
	19	*
	20	* 1. Redistributions of source code must retain the above copyright
40720ce3	21	* notice, this list of conditions and the following disclaimer.
0b33bc65 DSH	22	*
	23	* 2. Redistributions in binary form must reproduce the above copyright
	24	* notice, this list of conditions and the following disclaimer in
	25	* the documentation and/or other materials provided with the
	26	* distribution.
	27	*
	28	* 3. All advertising materials mentioning features or use of this
	29	* software must display the following acknowledgment:
	30	* "This product includes software developed by the OpenSSL Project
	31	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	32	*
	33	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	34	* endorse or promote products derived from this software without
	35	* prior written permission. For written permission, please contact
	36	* openssl-core@openssl.org.
	37	*
	38	* 5. Products derived from this software may not be called "OpenSSL"
	39	* nor may "OpenSSL" appear in their names without prior written
	40	* permission of the OpenSSL Project.
	41	*
	42	* 6. Redistributions of any form whatsoever must retain the following
	43	* acknowledgment:
	44	* "This product includes software developed by the OpenSSL Project
	45	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	48	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	50	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	51	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	52	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	53	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	54	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	56	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	57	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	58	* OF THE POSSIBILITY OF SUCH DAMAGE.
	59	* ====================================================================
	60	*
	61	* This product includes cryptographic software written by Eric Young
	62	* (eay@cryptsoft.com). This product includes software written by Tim
	63	* Hudson (tjh@cryptsoft.com).
	64	*
	65	*/
	66
	67	#include <stdio.h>
f1965221	68	#include <time.h>
0b33bc65 DSH	69	#include <cryptlib.h>
	70	#include <openssl/objects.h>
	71	#include <openssl/rand.h>
	72	#include <openssl/x509.h>
	73	#include <openssl/pem.h>
	74	#include <openssl/x509v3.h>
	75	#include <openssl/ocsp.h>
	76
40720ce3 MC	77	/*
	78	* Utility functions related to sending OCSP requests and extracting relevant
	79	* information from the response.
0b33bc65 DSH	80	*/
0b33bc65 DSH	81
40720ce3 MC	82	/*
	83	* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer:
	84	* useful if we want to add extensions.
0b33bc65 DSH	85	*/
	86
	87	OCSP_ONEREQ OCSP_request_add0_id(OCSP_REQUEST req, OCSP_CERTID *cid)
40720ce3 MC	88	{
	89	OCSP_ONEREQ *one = NULL;
	90
	91	if (!(one = OCSP_ONEREQ_new()))
	92	goto err;
	93	if (one->reqCert)
	94	OCSP_CERTID_free(one->reqCert);
	95	one->reqCert = cid;
	96	if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
	97	goto err;
	98	return one;
	99	err:
	100	OCSP_ONEREQ_free(one);
	101	return NULL;
	102	}
0b33bc65 DSH	103
	104	/* Set requestorName from an X509_NAME structure */
	105
	106	int OCSP_request_set1_name(OCSP_REQUEST req, X509_NAME nm)
40720ce3 MC	107	{
	108	GENERAL_NAME *gen;
	109	gen = GENERAL_NAME_new();
	110	if (gen == NULL)
	111	return 0;
	112	if (!X509_NAME_set(&gen->d.directoryName, nm)) {
	113	GENERAL_NAME_free(gen);
	114	return 0;
	115	}
	116	gen->type = GEN_DIRNAME;
	117	if (req->tbsRequest->requestorName)
	118	GENERAL_NAME_free(req->tbsRequest->requestorName);
	119	req->tbsRequest->requestorName = gen;
	120	return 1;
	121	}
0b33bc65 DSH	122
	123	/* Add a certificate to an OCSP request */
	124
	125	int OCSP_request_add1_cert(OCSP_REQUEST req, X509 cert)
40720ce3 MC	126	{
	127	OCSP_SIGNATURE *sig;
	128	if (!req->optionalSignature)
	129	req->optionalSignature = OCSP_SIGNATURE_new();
	130	sig = req->optionalSignature;
	131	if (!sig)
	132	return 0;
	133	if (!cert)
	134	return 1;
	135	if (!sig->certs && !(sig->certs = sk_X509_new_null()))
	136	return 0;
	137
	138	if (!sk_X509_push(sig->certs, cert))
	139	return 0;
	140	CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
	141	return 1;
	142	}
	143
	144	/*
	145	* Sign an OCSP request set the requestorName to the subjec name of an
	146	* optional signers certificate and include one or more optional certificates
	147	* in the request. Behaves like PKCS7_sign().
0b33bc65 DSH	148	*/
0b33bc65 DSH	149
40720ce3 MC	150	int OCSP_request_sign(OCSP_REQUEST *req,
	151	X509 *signer,
	152	EVP_PKEY *key,
	153	const EVP_MD *dgst,
	154	STACK_OF(X509) *certs, unsigned long flags)
	155	{
	156	int i;
	157	OCSP_SIGNATURE *sig;
	158	X509 *x;
	159
	160	if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
	161	goto err;
	162
	163	if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new()))
	164	goto err;
	165	if (!dgst)
	166	dgst = EVP_sha1();
	167	if (key) {
	168	if (!X509_check_private_key(signer, key)) {
	169	OCSPerr(OCSP_F_OCSP_REQUEST_SIGN,
	170	OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
	171	goto err;
	172	}
	173	if (!OCSP_REQUEST_sign(req, key, dgst))
	174	goto err;
	175	}
	176
	177	if (!(flags & OCSP_NOCERTS)) {
	178	if (!OCSP_request_add1_cert(req, signer))
	179	goto err;
	180	for (i = 0; i < sk_X509_num(certs); i++) {
	181	x = sk_X509_value(certs, i);
	182	if (!OCSP_request_add1_cert(req, x))
	183	goto err;
	184	}
	185	}
	186
	187	return 1;
	188	err:
	189	OCSP_SIGNATURE_free(req->optionalSignature);
	190	req->optionalSignature = NULL;
	191	return 0;
	192	}
0b33bc65 DSH	193
	194	/* Get response status */
	195
	196	int OCSP_response_status(OCSP_RESPONSE *resp)
40720ce3 MC	197	{
	198	return ASN1_ENUMERATED_get(resp->responseStatus);
	199	}
0b33bc65	200
40720ce3 MC	201	/*
	202	* Extract basic response from OCSP_RESPONSE or NULL if no basic response
	203	* present.
0b33bc65	204	*/
0b33bc65 DSH	205
0b33bc65 DSH	206	OCSP_BASICRESP OCSP_response_get1_basic(OCSP_RESPONSE resp)
40720ce3 MC	207	{
	208	OCSP_RESPBYTES *rb;
	209	rb = resp->responseBytes;
	210	if (!rb) {
	211	OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA);
	212	return NULL;
	213	}
	214	if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) {
	215	OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE);
	216	return NULL;
	217	}
	218
	219	return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
	220	}
	221
	222	/*
	223	* Return number of OCSP_SINGLERESP reponses present in a basic response.
0b33bc65 DSH	224	*/
	225
	226	int OCSP_resp_count(OCSP_BASICRESP *bs)
40720ce3 MC	227	{
	228	if (!bs)
	229	return -1;
	230	return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
	231	}
0b33bc65 DSH	232
	233	/* Extract an OCSP_SINGLERESP response with a given index */
	234
	235	OCSP_SINGLERESP OCSP_resp_get0(OCSP_BASICRESP bs, int idx)
40720ce3 MC	236	{
	237	if (!bs)
	238	return NULL;
	239	return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
	240	}
0b33bc65 DSH	241
	242	/* Look single response matching a given certificate ID */
	243
	244	int OCSP_resp_find(OCSP_BASICRESP bs, OCSP_CERTID id, int last)
40720ce3 MC	245	{
	246	int i;
	247	STACK_OF(OCSP_SINGLERESP) *sresp;
	248	OCSP_SINGLERESP *single;
	249	if (!bs)
	250	return -1;
	251	if (last < 0)
	252	last = 0;
	253	else
	254	last++;
	255	sresp = bs->tbsResponseData->responses;
	256	for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) {
	257	single = sk_OCSP_SINGLERESP_value(sresp, i);
	258	if (!OCSP_id_cmp(id, single->certId))
	259	return i;
	260	}
	261	return -1;
	262	}
	263
	264	/*
	265	* Extract status information from an OCSP_SINGLERESP structure. Note: the
	266	* revtime and reason values are only set if the certificate status is
	267	* revoked. Returns numerical value of status.
0b33bc65 DSH	268	*/
	269
	270	int OCSP_single_get0_status(OCSP_SINGLERESP single, int reason,
40720ce3 MC	271	ASN1_GENERALIZEDTIME **revtime,
	272	ASN1_GENERALIZEDTIME **thisupd,
	273	ASN1_GENERALIZEDTIME **nextupd)
	274	{
	275	int ret;
	276	OCSP_CERTSTATUS *cst;
	277	if (!single)
	278	return -1;
	279	cst = single->certStatus;
	280	ret = cst->type;
	281	if (ret == V_OCSP_CERTSTATUS_REVOKED) {
	282	OCSP_REVOKEDINFO *rev = cst->value.revoked;
	283	if (revtime)
	284	*revtime = rev->revocationTime;
	285	if (reason) {
	286	if (rev->revocationReason)
	287	*reason = ASN1_ENUMERATED_get(rev->revocationReason);
	288	else
	289	*reason = -1;
	290	}
	291	}
	292	if (thisupd)
	293	*thisupd = single->thisUpdate;
	294	if (nextupd)
	295	*nextupd = single->nextUpdate;
	296	return ret;
	297	}
	298
	299	/*
	300	* This function combines the previous ones: look up a certificate ID and if
	301	* found extract status information. Return 0 is successful.
0b33bc65 DSH	302	*/
	303
	304	int OCSP_resp_find_status(OCSP_BASICRESP bs, OCSP_CERTID id, int *status,
40720ce3 MC	305	int *reason,
	306	ASN1_GENERALIZEDTIME **revtime,
	307	ASN1_GENERALIZEDTIME **thisupd,
	308	ASN1_GENERALIZEDTIME **nextupd)
	309	{
	310	int i;
	311	OCSP_SINGLERESP *single;
	312	i = OCSP_resp_find(bs, id, -1);
	313	/* Maybe check for multiple responses and give an error? */
	314	if (i < 0)
	315	return 0;
	316	single = OCSP_resp_get0(bs, i);
	317	i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
	318	if (status)
	319	*status = i;
	320	return 1;
	321	}
	322
	323	/*
	324	* Check validity of thisUpdate and nextUpdate fields. It is possible that
	325	* the request will take a few seconds to process and/or the time wont be
	326	* totally accurate. Therefore to avoid rejecting otherwise valid time we
	327	* allow the times to be within 'nsec' of the current time. Also to avoid
	328	* accepting very old responses without a nextUpdate field an optional maxage
f1965221 DSH	329	* parameter specifies the maximum age the thisUpdate field can be.
	330	*/
	331
40720ce3 MC	332	int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,
	333	ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
	334	{
	335	int ret = 1;
	336	time_t t_now, t_tmp;
	337	time(&t_now);
	338	/* Check thisUpdate is valid and not more than nsec in the future */
	339	if (!ASN1_GENERALIZEDTIME_check(thisupd)) {
	340	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD);
	341	ret = 0;
	342	} else {
	343	t_tmp = t_now + nsec;
	344	if (X509_cmp_time(thisupd, &t_tmp) > 0) {
	345	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID);
	346	ret = 0;
	347	}
	348
	349	/*
	350	* If maxsec specified check thisUpdate is not more than maxsec in
	351	* the past
	352	*/
	353	if (maxsec >= 0) {
	354	t_tmp = t_now - maxsec;
	355	if (X509_cmp_time(thisupd, &t_tmp) < 0) {
	356	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD);
	357	ret = 0;
	358	}
	359	}
	360	}
	361
	362	if (!nextupd)
	363	return ret;
	364
	365	/* Check nextUpdate is valid and not more than nsec in the past */
	366	if (!ASN1_GENERALIZEDTIME_check(nextupd)) {
	367	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
	368	ret = 0;
	369	} else {
	370	t_tmp = t_now - nsec;
	371	if (X509_cmp_time(nextupd, &t_tmp) < 0) {
	372	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED);
	373	ret = 0;
	374	}
	375	}
	376
	377	/* Also don't allow nextUpdate to precede thisUpdate */
	378	if (ASN1_STRING_cmp(nextupd, thisupd) < 0) {
	379	OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
	380	OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
	381	ret = 0;
	382	}
	383
	384	return ret;
	385	}