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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 1.11 2016/07/16 16:14:28 beck 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
74int asn1_time_parse(const char *, size_t, struct tm *, int);
75int asn1_tm_cmp(struct tm *, struct tm *);
76
77/* Utility functions related to sending OCSP requests and extracting
78 * relevant information from the response.
79 */
80
81/* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ
82 * pointer: useful if we want to add extensions.
83 */
84OCSP_ONEREQ *
85OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
86{
87 OCSP_ONEREQ *one = NULL;
88
89 if (!(one = OCSP_ONEREQ_new()))
90 goto err;
91 if (one->reqCert)
92 OCSP_CERTID_free(one->reqCert);
93 one->reqCert = cid;
94 if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
95 goto err;
96 return one;
97
98err:
99 OCSP_ONEREQ_free(one);
100 return NULL;
101}
102
103/* Set requestorName from an X509_NAME structure */
104int
105OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
106{
107 GENERAL_NAME *gen;
108
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}
122
123/* Add a certificate to an OCSP request */
124int
125OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
126{
127 OCSP_SIGNATURE *sig;
128
129 if (!req->optionalSignature)
130 req->optionalSignature = OCSP_SIGNATURE_new();
131 sig = req->optionalSignature;
132 if (!sig)
133 return 0;
134 if (!cert)
135 return 1;
136 if (!sig->certs && !(sig->certs = sk_X509_new_null()))
137 return 0;
138
139 if (!sk_X509_push(sig->certs, cert))
140 return 0;
141 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
142 return 1;
143}
144
145/* Sign an OCSP request set the requestorName to the subjec
146 * name of an optional signers certificate and include one
147 * or more optional certificates in the request. Behaves
148 * like PKCS7_sign().
149 */
150int
151OCSP_request_sign(OCSP_REQUEST *req, X509 *signer, EVP_PKEY *key,
152 const EVP_MD *dgst, STACK_OF(X509) *certs, unsigned long flags)
153{
154 int i;
155 OCSP_SIGNATURE *sig;
156 X509 *x;
157
158 if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
159 goto err;
160
161 if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new()))
162 goto err;
163 if (key) {
164 if (!X509_check_private_key(signer, key)) {
165 OCSPerr(OCSP_F_OCSP_REQUEST_SIGN,
166 OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
167 goto err;
168 }
169 if (!OCSP_REQUEST_sign(req, key, dgst))
170 goto err;
171 }
172
173 if (!(flags & OCSP_NOCERTS)) {
174 if (!OCSP_request_add1_cert(req, signer))
175 goto err;
176 for (i = 0; i < sk_X509_num(certs); i++) {
177 x = sk_X509_value(certs, i);
178 if (!OCSP_request_add1_cert(req, x))
179 goto err;
180 }
181 }
182
183 return 1;
184
185err:
186 OCSP_SIGNATURE_free(req->optionalSignature);
187 req->optionalSignature = NULL;
188 return 0;
189}
190
191/* Get response status */
192int
193OCSP_response_status(OCSP_RESPONSE *resp)
194{
195 return ASN1_ENUMERATED_get(resp->responseStatus);
196}
197
198/* Extract basic response from OCSP_RESPONSE or NULL if
199 * no basic response present.
200 */
201OCSP_BASICRESP *
202OCSP_response_get1_basic(OCSP_RESPONSE *resp)
203{
204 OCSP_RESPBYTES *rb;
205
206 rb = resp->responseBytes;
207 if (!rb) {
208 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC,
209 OCSP_R_NO_RESPONSE_DATA);
210 return NULL;
211 }
212 if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) {
213 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC,
214 OCSP_R_NOT_BASIC_RESPONSE);
215 return NULL;
216 }
217
218 return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
219}
220
221/* Return number of OCSP_SINGLERESP reponses present in
222 * a basic response.
223 */
224int
225OCSP_resp_count(OCSP_BASICRESP *bs)
226{
227 if (!bs)
228 return -1;
229 return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
230}
231
232/* Extract an OCSP_SINGLERESP response with a given index */
233OCSP_SINGLERESP *
234OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
235{
236 if (!bs)
237 return NULL;
238 return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
239}
240
241/* Look single response matching a given certificate ID */
242int
243OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
244{
245 int i;
246 STACK_OF(OCSP_SINGLERESP) *sresp;
247 OCSP_SINGLERESP *single;
248
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/* Extract status information from an OCSP_SINGLERESP structure.
265 * Note: the revtime and reason values are only set if the
266 * certificate status is revoked. Returns numerical value of
267 * status.
268 */
269int
270OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
271 ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
272 ASN1_GENERALIZEDTIME **nextupd)
273{
274 int ret;
275 OCSP_CERTSTATUS *cst;
276
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
284 if (revtime)
285 *revtime = rev->revocationTime;
286 if (reason) {
287 if (rev->revocationReason)
288 *reason = ASN1_ENUMERATED_get(
289 rev->revocationReason);
290 else
291 *reason = -1;
292 }
293 }
294 if (thisupd)
295 *thisupd = single->thisUpdate;
296 if (nextupd)
297 *nextupd = single->nextUpdate;
298 return ret;
299}
300
301/* This function combines the previous ones: look up a certificate ID and
302 * if found extract status information. Return 0 is successful.
303 */
304int
305OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
306 int *reason, ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
307 ASN1_GENERALIZEDTIME **nextupd)
308{
309 int i;
310 OCSP_SINGLERESP *single;
311
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/* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
324 * take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
325 * rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
326 * Also to avoid accepting very old responses without a nextUpdate field an optional maxage
327 * parameter specifies the maximum age the thisUpdate field can be.
328 */
329int
330OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,
331 ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
332{
333 time_t t_now, t_tmp;
334 struct tm tm_this, tm_next, tm_tmp;
335
336 time(&t_now);
337
338 /*
339 * Times must explicitly be a GENERALIZEDTIME as per section
340 * 4.2.2.1 of RFC 6960 - It is invalid to accept other times
341 * (such as UTCTIME permitted/required by RFC 5280 for certificates)
342 */
343
344 /* Check thisUpdate is valid and not more than nsec in the future */
345 if (asn1_time_parse(thisupd->data, thisupd->length, &tm_this,
346 V_ASN1_GENERALIZEDTIME) != V_ASN1_GENERALIZEDTIME) {
347 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
348 OCSP_R_ERROR_IN_THISUPDATE_FIELD);
349 return 0;
350 } else {
351 t_tmp = t_now + nsec;
352 if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
353 return 0;
354 if (asn1_tm_cmp(&tm_this, &tm_tmp) > 0) {
355 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
356 OCSP_R_STATUS_NOT_YET_VALID);
357 return 0;
358 }
359
360 /*
361 * If maxsec specified check thisUpdate is not more than maxsec
362 * in the past
363 */
364 if (maxsec >= 0) {
365 t_tmp = t_now - maxsec;
366 if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
367 return 0;
368 if (asn1_tm_cmp(&tm_this, &tm_tmp) < 0) {
369 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
370 OCSP_R_STATUS_TOO_OLD);
371 return 0;
372 }
373 }
374 }
375
376 if (!nextupd)
377 return 1;
378
379 /* Check nextUpdate is valid and not more than nsec in the past */
380 if (asn1_time_parse(nextupd->data, nextupd->length, &tm_next,
381 V_ASN1_GENERALIZEDTIME) != V_ASN1_GENERALIZEDTIME) {
382 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
383 OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
384 return 0;
385 } else {
386 t_tmp = t_now - nsec;
387 if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
388 return 0;
389 if (asn1_tm_cmp(&tm_next, &tm_tmp) < 0) {
390 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
391 OCSP_R_STATUS_EXPIRED);
392 return 0;
393 }
394 }
395
396 /* Also don't allow nextUpdate to precede thisUpdate */
397 if (asn1_tm_cmp(&tm_next, &tm_this) < 0) {
398 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY,
399 OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
400 return 0;
401 }
402
403 return 1;
404}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-07 20:46:56 +0000