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diff --git a/src/lib/libcrypto/ocsp/ocsp_cl.c b/src/lib/libcrypto/ocsp/ocsp_cl.c
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1/* $OpenBSD: ocsp_cl.c,v 1.8 2014/10/18 17:20:40 jsing Exp $ */
2/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
3 * project. */
4
5/* History:
6 This file was transfered to Richard Levitte from CertCo by Kathy
7 Weinhold in mid-spring 2000 to be included in OpenSSL or released
8 as a patch kit. */
9
10/* ====================================================================
11 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. All advertising materials mentioning features or use of this
26 * software must display the following acknowledgment:
27 * "This product includes software developed by the OpenSSL Project
28 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
29 *
30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
31 * endorse or promote products derived from this software without
32 * prior written permission. For written permission, please contact
33 * openssl-core@openssl.org.
34 *
35 * 5. Products derived from this software may not be called "OpenSSL"
36 * nor may "OpenSSL" appear in their names without prior written
37 * permission of the OpenSSL Project.
38 *
39 * 6. Redistributions of any form whatsoever must retain the following
40 * acknowledgment:
41 * "This product includes software developed by the OpenSSL Project
42 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
47 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
55 * OF THE POSSIBILITY OF SUCH DAMAGE.
56 * ====================================================================
57 *
58 * This product includes cryptographic software written by Eric Young
59 * (eay@cryptsoft.com). This product includes software written by Tim
60 * Hudson (tjh@cryptsoft.com).
61 *
62 */
63
64#include <stdio.h>
65#include <time.h>
66
67#include <openssl/err.h>
68#include <openssl/ocsp.h>
69#include <openssl/objects.h>
70#include <openssl/pem.h>
71#include <openssl/x509.h>
72#include <openssl/x509v3.h>
73
74/* Utility functions related to sending OCSP requests and extracting
75 * relevant information from the response.
76 */
77
78/* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ
79 * pointer: useful if we want to add extensions.
80 */
81OCSP_ONEREQ *
82OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
83{
84 OCSP_ONEREQ *one = NULL;
85
86 if (!(one = OCSP_ONEREQ_new()))
87 goto err;
88 if (one->reqCert)
89 OCSP_CERTID_free(one->reqCert);
90 one->reqCert = cid;
91 if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
92 goto err;
93 return one;
94
95err:
96 OCSP_ONEREQ_free(one);
97 return NULL;
98}
99
100/* Set requestorName from an X509_NAME structure */
101int
102OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
103{
104 GENERAL_NAME *gen;
105
106 gen = GENERAL_NAME_new();
107 if (gen == NULL)
108 return 0;
109 if (!X509_NAME_set(&gen->d.directoryName, nm)) {
110 GENERAL_NAME_free(gen);
111 return 0;
112 }
113 gen->type = GEN_DIRNAME;
114 if (req->tbsRequest->requestorName)
115 GENERAL_NAME_free(req->tbsRequest->requestorName);
116 req->tbsRequest->requestorName = gen;
117 return 1;
118}
119
120/* Add a certificate to an OCSP request */
121int
122OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
123{
124 OCSP_SIGNATURE *sig;
125
126 if (!req->optionalSignature)
127 req->optionalSignature = OCSP_SIGNATURE_new();
128 sig = req->optionalSignature;
129 if (!sig)
130 return 0;
131 if (!cert)
132 return 1;
133 if (!sig->certs && !(sig->certs = sk_X509_new_null()))
134 return 0;
135
136 if (!sk_X509_push(sig->certs, cert))
137 return 0;
138 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
139 return 1;
140}
141
142/* Sign an OCSP request set the requestorName to the subjec
143 * name of an optional signers certificate and include one
144 * or more optional certificates in the request. Behaves
145 * like PKCS7_sign().
146 */
147int
148OCSP_request_sign(OCSP_REQUEST *req, X509 *signer, EVP_PKEY *key,
149 const EVP_MD *dgst, STACK_OF(X509) *certs, unsigned long flags)
150{
151 int i;
152 OCSP_SIGNATURE *sig;
153 X509 *x;
154
155 if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
156 goto err;
157
158 if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new()))
159 goto err;
160 if (key) {
161 if (!X509_check_private_key(signer, key)) {
162 OCSPerr(OCSP_F_OCSP_REQUEST_SIGN,
163 OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
164 goto err;
165 }
166 if (!OCSP_REQUEST_sign(req, key, dgst))
167 goto err;
168 }
169
170 if (!(flags & OCSP_NOCERTS)) {
171 if (!OCSP_request_add1_cert(req, signer))
172 goto err;
173 for (i = 0; i < sk_X509_num(certs); i++) {
174 x = sk_X509_value(certs, i);
175 if (!OCSP_request_add1_cert(req, x))
176 goto err;
177 }
178 }
179
180 return 1;
181
182err:
183 OCSP_SIGNATURE_free(req->optionalSignature);
184 req->optionalSignature = NULL;
185 return 0;
186}
187
188/* Get response status */
189int
190OCSP_response_status(OCSP_RESPONSE *resp)
191{
192 return ASN1_ENUMERATED_get(resp->responseStatus);
193}
194
195/* Extract basic response from OCSP_RESPONSE or NULL if
196 * no basic response present.
197 */
198OCSP_BASICRESP *
199OCSP_response_get1_basic(OCSP_RESPONSE *resp)
200{
201 OCSP_RESPBYTES *rb;
202
203 rb = resp->responseBytes;
204 if (!rb) {
205 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC,
206 OCSP_R_NO_RESPONSE_DATA);
207 return NULL;
208 }
209 if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) {
210 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC,
211 OCSP_R_NOT_BASIC_RESPONSE);
212 return NULL;
213 }
214
215 return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
216}
217
218/* Return number of OCSP_SINGLERESP reponses present in
219 * a basic response.
220 */
221int
222OCSP_resp_count(OCSP_BASICRESP *bs)
223{
224 if (!bs)
225 return -1;
226 return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
227}
228
229/* Extract an OCSP_SINGLERESP response with a given index */
230OCSP_SINGLERESP *
231OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
232{
233 if (!bs)
234 return NULL;
235 return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
236}
237
238/* Look single response matching a given certificate ID */
239int
240OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
241{
242 int i;
243 STACK_OF(OCSP_SINGLERESP) *sresp;
244 OCSP_SINGLERESP *single;
245
246 if (!bs)
247 return -1;
248 if (last < 0)
249 last = 0;
250 else
251 last++;
252 sresp = bs->tbsResponseData->responses;
253 for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) {
254 single = sk_OCSP_SINGLERESP_value(sresp, i);
255 if (!OCSP_id_cmp(id, single->certId))
256 return i;
257 }
258 return -1;
259}
260
261/* Extract status information from an OCSP_SINGLERESP structure.
262 * Note: the revtime and reason values are only set if the
263 * certificate status is revoked. Returns numerical value of
264 * status.
265 */
266int
267OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
268 ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
269 ASN1_GENERALIZEDTIME **nextupd)
270{
271 int ret;
272 OCSP_CERTSTATUS *cst;
273
274 if (!single)
275 return -1;
276 cst = single->certStatus;
277 ret = cst->type;
278 if (ret == V_OCSP_CERTSTATUS_REVOKED) {
279 OCSP_REVOKEDINFO *rev = cst->value.revoked;
280
281 if (revtime)
282 *revtime = rev->revocationTime;
283 if (reason) {
284 if (rev->revocationReason)
285 *reason = ASN1_ENUMERATED_get(
286 rev->revocationReason);
287 else
288 *reason = -1;
289 }
290 }
291 if (thisupd)
292 *thisupd = single->thisUpdate;
293 if (nextupd)
294 *nextupd = single->nextUpdate;
295 return ret;
296}
297
298/* This function combines the previous ones: look up a certificate ID and
299 * if found extract status information. Return 0 is successful.
300 */
301int
302OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
303 int *reason, ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
304 ASN1_GENERALIZEDTIME **nextupd)
305{
306 int i;
307 OCSP_SINGLERESP *single;
308
309 i = OCSP_resp_find(bs, id, -1);
310 /* Maybe check for multiple responses and give an error? */
311 if (i < 0)
312 return 0;
313 single = OCSP_resp_get0(bs, i);
314 i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
315 if (status)
316 *status = i;
317 return 1;
318}
319
320/* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
321 * take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
322 * rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
323 * Also to avoid accepting very old responses without a nextUpdate field an optional maxage
324 * parameter specifies the maximum age the thisUpdate field can be.
325 */
326int
327OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,
328 ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
329{
330 int ret = 1;
331 time_t t_now, t_tmp;
332
333 time(&t_now);
334 /* Check thisUpdate is valid and not more than nsec in the future */
335 if (!ASN1_GENERALIZEDTIME_check(thisupd)) {
336 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
337 OCSP_R_ERROR_IN_THISUPDATE_FIELD);
338 ret = 0;
339 } else {
340 t_tmp = t_now + nsec;
341 if (X509_cmp_time(thisupd, &t_tmp) > 0) {
342 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
343 OCSP_R_STATUS_NOT_YET_VALID);
344 ret = 0;
345 }
346
347 /* If maxsec specified check thisUpdate is not more than maxsec in the past */
348 if (maxsec >= 0) {
349 t_tmp = t_now - maxsec;
350 if (X509_cmp_time(thisupd, &t_tmp) < 0) {
351 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
352 OCSP_R_STATUS_TOO_OLD);
353 ret = 0;
354 }
355 }
356 }
357
358 if (!nextupd)
359 return ret;
360
361 /* Check nextUpdate is valid and not more than nsec in the past */
362 if (!ASN1_GENERALIZEDTIME_check(nextupd)) {
363 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
364 OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
365 ret = 0;
366 } else {
367 t_tmp = t_now - nsec;
368 if (X509_cmp_time(nextupd, &t_tmp) < 0) {
369 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
370 OCSP_R_STATUS_EXPIRED);
371 ret = 0;
372 }
373 }
374
375 /* Also don't allow nextUpdate to precede thisUpdate */
376 if (ASN1_STRING_cmp(nextupd, thisupd) < 0) {
377 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
378 OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
379 ret = 0;
380 }
381
382 return ret;
383}
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