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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/* ocsp_cl.c */
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#include <cryptlib.h>
67#include <openssl/objects.h>
68#include <openssl/rand.h>
69#include <openssl/x509.h>
70#include <openssl/pem.h>
71#include <openssl/x509v3.h>
72#include <openssl/ocsp.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 */
81
82OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
83 {
84 OCSP_ONEREQ *one = NULL;
85
86 if (!(one = OCSP_ONEREQ_new())) goto err;
87 if (one->reqCert) OCSP_CERTID_free(one->reqCert);
88 one->reqCert = cid;
89 if (req &&
90 !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
91 goto err;
92 return one;
93err:
94 OCSP_ONEREQ_free(one);
95 return NULL;
96 }
97
98/* Set requestorName from an X509_NAME structure */
99
100int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
101 {
102 GENERAL_NAME *gen;
103 gen = GENERAL_NAME_new();
104 if (gen == NULL)
105 return 0;
106 if (!X509_NAME_set(&gen->d.directoryName, nm))
107 {
108 GENERAL_NAME_free(gen);
109 return 0;
110 }
111 gen->type = GEN_DIRNAME;
112 if (req->tbsRequest->requestorName)
113 GENERAL_NAME_free(req->tbsRequest->requestorName);
114 req->tbsRequest->requestorName = gen;
115 return 1;
116 }
117
118
119/* Add a certificate to an OCSP request */
120
121int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
122 {
123 OCSP_SIGNATURE *sig;
124 if (!req->optionalSignature)
125 req->optionalSignature = OCSP_SIGNATURE_new();
126 sig = req->optionalSignature;
127 if (!sig) return 0;
128 if (!cert) return 1;
129 if (!sig->certs && !(sig->certs = sk_X509_new_null()))
130 return 0;
131
132 if(!sk_X509_push(sig->certs, cert)) return 0;
133 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
134 return 1;
135 }
136
137/* Sign an OCSP request set the requestorName to the subjec
138 * name of an optional signers certificate and include one
139 * or more optional certificates in the request. Behaves
140 * like PKCS7_sign().
141 */
142
143int OCSP_request_sign(OCSP_REQUEST *req,
144 X509 *signer,
145 EVP_PKEY *key,
146 const EVP_MD *dgst,
147 STACK_OF(X509) *certs,
148 unsigned long flags)
149 {
150 int i;
151 OCSP_SIGNATURE *sig;
152 X509 *x;
153
154 if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
155 goto err;
156
157 if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err;
158 if (!dgst) dgst = EVP_sha1();
159 if (key)
160 {
161 if (!X509_check_private_key(signer, key))
162 {
163 OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
164 goto err;
165 }
166 if (!OCSP_REQUEST_sign(req, key, dgst)) goto err;
167 }
168
169 if (!(flags & OCSP_NOCERTS))
170 {
171 if(!OCSP_request_add1_cert(req, signer)) goto err;
172 for (i = 0; i < sk_X509_num(certs); i++)
173 {
174 x = sk_X509_value(certs, i);
175 if (!OCSP_request_add1_cert(req, x)) goto err;
176 }
177 }
178
179 return 1;
180err:
181 OCSP_SIGNATURE_free(req->optionalSignature);
182 req->optionalSignature = NULL;
183 return 0;
184 }
185
186/* Get response status */
187
188int OCSP_response_status(OCSP_RESPONSE *resp)
189 {
190 return ASN1_ENUMERATED_get(resp->responseStatus);
191 }
192
193/* Extract basic response from OCSP_RESPONSE or NULL if
194 * no basic response present.
195 */
196
197
198OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp)
199 {
200 OCSP_RESPBYTES *rb;
201 rb = resp->responseBytes;
202 if (!rb)
203 {
204 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA);
205 return NULL;
206 }
207 if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic)
208 {
209 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE);
210 return NULL;
211 }
212
213 return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
214 }
215
216/* Return number of OCSP_SINGLERESP reponses present in
217 * a basic response.
218 */
219
220int OCSP_resp_count(OCSP_BASICRESP *bs)
221 {
222 if (!bs) return -1;
223 return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
224 }
225
226/* Extract an OCSP_SINGLERESP response with a given index */
227
228OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
229 {
230 if (!bs) return NULL;
231 return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
232 }
233
234/* Look single response matching a given certificate ID */
235
236int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
237 {
238 int i;
239 STACK_OF(OCSP_SINGLERESP) *sresp;
240 OCSP_SINGLERESP *single;
241 if (!bs) return -1;
242 if (last < 0) last = 0;
243 else last++;
244 sresp = bs->tbsResponseData->responses;
245 for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++)
246 {
247 single = sk_OCSP_SINGLERESP_value(sresp, i);
248 if (!OCSP_id_cmp(id, single->certId)) return i;
249 }
250 return -1;
251 }
252
253/* Extract status information from an OCSP_SINGLERESP structure.
254 * Note: the revtime and reason values are only set if the
255 * certificate status is revoked. Returns numerical value of
256 * status.
257 */
258
259int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
260 ASN1_GENERALIZEDTIME **revtime,
261 ASN1_GENERALIZEDTIME **thisupd,
262 ASN1_GENERALIZEDTIME **nextupd)
263 {
264 int ret;
265 OCSP_CERTSTATUS *cst;
266 if(!single) return -1;
267 cst = single->certStatus;
268 ret = cst->type;
269 if (ret == V_OCSP_CERTSTATUS_REVOKED)
270 {
271 OCSP_REVOKEDINFO *rev = cst->value.revoked;
272 if (revtime) *revtime = rev->revocationTime;
273 if (reason)
274 {
275 if(rev->revocationReason)
276 *reason = ASN1_ENUMERATED_get(rev->revocationReason);
277 else *reason = -1;
278 }
279 }
280 if(thisupd) *thisupd = single->thisUpdate;
281 if(nextupd) *nextupd = single->nextUpdate;
282 return ret;
283 }
284
285/* This function combines the previous ones: look up a certificate ID and
286 * if found extract status information. Return 0 is successful.
287 */
288
289int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
290 int *reason,
291 ASN1_GENERALIZEDTIME **revtime,
292 ASN1_GENERALIZEDTIME **thisupd,
293 ASN1_GENERALIZEDTIME **nextupd)
294 {
295 int i;
296 OCSP_SINGLERESP *single;
297 i = OCSP_resp_find(bs, id, -1);
298 /* Maybe check for multiple responses and give an error? */
299 if(i < 0) return 0;
300 single = OCSP_resp_get0(bs, i);
301 i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
302 if(status) *status = i;
303 return 1;
304 }
305
306/* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
307 * take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
308 * rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
309 * Also to avoid accepting very old responses without a nextUpdate field an optional maxage
310 * parameter specifies the maximum age the thisUpdate field can be.
311 */
312
313int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
314 {
315 int ret = 1;
316 time_t t_now, t_tmp;
317 time(&t_now);
318 /* Check thisUpdate is valid and not more than nsec in the future */
319 if (!ASN1_GENERALIZEDTIME_check(thisupd))
320 {
321 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD);
322 ret = 0;
323 }
324 else
325 {
326 t_tmp = t_now + nsec;
327 if (X509_cmp_time(thisupd, &t_tmp) > 0)
328 {
329 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID);
330 ret = 0;
331 }
332
333 /* If maxsec specified check thisUpdate is not more than maxsec in the past */
334 if (maxsec >= 0)
335 {
336 t_tmp = t_now - maxsec;
337 if (X509_cmp_time(thisupd, &t_tmp) < 0)
338 {
339 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD);
340 ret = 0;
341 }
342 }
343 }
344
345
346 if (!nextupd) return ret;
347
348 /* Check nextUpdate is valid and not more than nsec in the past */
349 if (!ASN1_GENERALIZEDTIME_check(nextupd))
350 {
351 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
352 ret = 0;
353 }
354 else
355 {
356 t_tmp = t_now - nsec;
357 if (X509_cmp_time(nextupd, &t_tmp) < 0)
358 {
359 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED);
360 ret = 0;
361 }
362 }
363
364 /* Also don't allow nextUpdate to precede thisUpdate */
365 if (ASN1_STRING_cmp(nextupd, thisupd) < 0)
366 {
367 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
368 ret = 0;
369 }
370
371 return ret;
372 }
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