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0b33bc65 | 1 | /* ocsp_cl.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL | |
4 | * project. | |
5 | */ | |
0b33bc65 | 6 | |
0f113f3e 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 | |
0f113f3e | 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> |
b39fc560 | 69 | #include "internal/cryptlib.h" |
0b33bc65 DSH |
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> | |
6ef869d7 | 76 | #include "ocsp_lcl.h" |
0b33bc65 | 77 | |
0f113f3e MC |
78 | /* |
79 | * Utility functions related to sending OCSP requests and extracting relevant | |
80 | * information from the response. | |
0b33bc65 DSH |
81 | */ |
82 | ||
0f113f3e MC |
83 | /* |
84 | * Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer: | |
85 | * useful if we want to add extensions. | |
0b33bc65 DSH |
86 | */ |
87 | ||
88 | OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) | |
0f113f3e MC |
89 | { |
90 | OCSP_ONEREQ *one = NULL; | |
91 | ||
75ebbd9a | 92 | if ((one = OCSP_ONEREQ_new()) == NULL) |
0f113f3e | 93 | goto err; |
25aaa98a | 94 | OCSP_CERTID_free(one->reqCert); |
0f113f3e | 95 | one->reqCert = cid; |
a332635e | 96 | if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest.requestList, one)) |
0f113f3e MC |
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) | |
0f113f3e MC |
107 | { |
108 | GENERAL_NAME *gen; | |
25aaa98a | 109 | |
0f113f3e MC |
110 | gen = GENERAL_NAME_new(); |
111 | if (gen == NULL) | |
112 | return 0; | |
113 | if (!X509_NAME_set(&gen->d.directoryName, nm)) { | |
114 | GENERAL_NAME_free(gen); | |
115 | return 0; | |
116 | } | |
117 | gen->type = GEN_DIRNAME; | |
a332635e DSH |
118 | GENERAL_NAME_free(req->tbsRequest.requestorName); |
119 | req->tbsRequest.requestorName = gen; | |
0f113f3e MC |
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) | |
0f113f3e 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; | |
75ebbd9a RS |
135 | if (sig->certs == NULL |
136 | && (sig->certs = sk_X509_new_null()) == NULL) | |
0f113f3e MC |
137 | return 0; |
138 | ||
139 | if (!sk_X509_push(sig->certs, cert)) | |
140 | return 0; | |
05f0fb9f | 141 | X509_up_ref(cert); |
0f113f3e MC |
142 | return 1; |
143 | } | |
144 | ||
145 | /* | |
146 | * Sign an OCSP request set the requestorName to the subjec name of an | |
147 | * optional signers certificate and include one or more optional certificates | |
148 | * in the request. Behaves like PKCS7_sign(). | |
0b33bc65 DSH |
149 | */ |
150 | ||
0f113f3e MC |
151 | int OCSP_request_sign(OCSP_REQUEST *req, |
152 | X509 *signer, | |
153 | EVP_PKEY *key, | |
154 | const EVP_MD *dgst, | |
155 | STACK_OF(X509) *certs, unsigned long flags) | |
156 | { | |
157 | int i; | |
158 | X509 *x; | |
159 | ||
160 | if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) | |
161 | goto err; | |
162 | ||
75ebbd9a | 163 | if ((req->optionalSignature = OCSP_SIGNATURE_new()) == NULL) |
0f113f3e MC |
164 | goto err; |
165 | if (key) { | |
166 | if (!X509_check_private_key(signer, key)) { | |
167 | OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, | |
168 | OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
169 | goto err; | |
170 | } | |
171 | if (!OCSP_REQUEST_sign(req, key, dgst)) | |
172 | goto err; | |
173 | } | |
174 | ||
175 | if (!(flags & OCSP_NOCERTS)) { | |
176 | if (!OCSP_request_add1_cert(req, signer)) | |
177 | goto err; | |
178 | for (i = 0; i < sk_X509_num(certs); i++) { | |
179 | x = sk_X509_value(certs, i); | |
180 | if (!OCSP_request_add1_cert(req, x)) | |
181 | goto err; | |
182 | } | |
183 | } | |
184 | ||
185 | return 1; | |
186 | err: | |
187 | OCSP_SIGNATURE_free(req->optionalSignature); | |
188 | req->optionalSignature = NULL; | |
189 | return 0; | |
190 | } | |
0b33bc65 DSH |
191 | |
192 | /* Get response status */ | |
193 | ||
194 | int OCSP_response_status(OCSP_RESPONSE *resp) | |
0f113f3e MC |
195 | { |
196 | return ASN1_ENUMERATED_get(resp->responseStatus); | |
197 | } | |
0b33bc65 | 198 | |
0f113f3e MC |
199 | /* |
200 | * Extract basic response from OCSP_RESPONSE or NULL if no basic response | |
201 | * present. | |
0b33bc65 | 202 | */ |
0b33bc65 DSH |
203 | |
204 | OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) | |
0f113f3e MC |
205 | { |
206 | OCSP_RESPBYTES *rb; | |
207 | rb = resp->responseBytes; | |
208 | if (!rb) { | |
209 | OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, 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, OCSP_R_NOT_BASIC_RESPONSE); | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); | |
218 | } | |
219 | ||
6ef869d7 DSH |
220 | ASN1_OCTET_STRING *OCSP_resp_get0_signature(OCSP_BASICRESP *bs) |
221 | { | |
222 | return bs->signature; | |
223 | } | |
224 | ||
0f113f3e MC |
225 | /* |
226 | * Return number of OCSP_SINGLERESP reponses present in a basic response. | |
0b33bc65 DSH |
227 | */ |
228 | ||
229 | int OCSP_resp_count(OCSP_BASICRESP *bs) | |
0f113f3e MC |
230 | { |
231 | if (!bs) | |
232 | return -1; | |
a332635e | 233 | return sk_OCSP_SINGLERESP_num(bs->tbsResponseData.responses); |
0f113f3e | 234 | } |
0b33bc65 DSH |
235 | |
236 | /* Extract an OCSP_SINGLERESP response with a given index */ | |
237 | ||
238 | OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) | |
0f113f3e MC |
239 | { |
240 | if (!bs) | |
241 | return NULL; | |
a332635e | 242 | return sk_OCSP_SINGLERESP_value(bs->tbsResponseData.responses, idx); |
0f113f3e | 243 | } |
0b33bc65 DSH |
244 | |
245 | /* Look single response matching a given certificate ID */ | |
246 | ||
247 | int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) | |
0f113f3e MC |
248 | { |
249 | int i; | |
250 | STACK_OF(OCSP_SINGLERESP) *sresp; | |
251 | OCSP_SINGLERESP *single; | |
252 | if (!bs) | |
253 | return -1; | |
254 | if (last < 0) | |
255 | last = 0; | |
256 | else | |
257 | last++; | |
a332635e | 258 | sresp = bs->tbsResponseData.responses; |
0f113f3e MC |
259 | for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) { |
260 | single = sk_OCSP_SINGLERESP_value(sresp, i); | |
261 | if (!OCSP_id_cmp(id, single->certId)) | |
262 | return i; | |
263 | } | |
264 | return -1; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Extract status information from an OCSP_SINGLERESP structure. Note: the | |
269 | * revtime and reason values are only set if the certificate status is | |
270 | * revoked. Returns numerical value of status. | |
0b33bc65 DSH |
271 | */ |
272 | ||
273 | int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, | |
0f113f3e MC |
274 | ASN1_GENERALIZEDTIME **revtime, |
275 | ASN1_GENERALIZEDTIME **thisupd, | |
276 | ASN1_GENERALIZEDTIME **nextupd) | |
277 | { | |
278 | int ret; | |
279 | OCSP_CERTSTATUS *cst; | |
280 | if (!single) | |
281 | return -1; | |
282 | cst = single->certStatus; | |
283 | ret = cst->type; | |
284 | if (ret == V_OCSP_CERTSTATUS_REVOKED) { | |
285 | OCSP_REVOKEDINFO *rev = cst->value.revoked; | |
286 | if (revtime) | |
287 | *revtime = rev->revocationTime; | |
288 | if (reason) { | |
289 | if (rev->revocationReason) | |
290 | *reason = ASN1_ENUMERATED_get(rev->revocationReason); | |
291 | else | |
292 | *reason = -1; | |
293 | } | |
294 | } | |
295 | if (thisupd) | |
296 | *thisupd = single->thisUpdate; | |
297 | if (nextupd) | |
298 | *nextupd = single->nextUpdate; | |
299 | return ret; | |
300 | } | |
301 | ||
302 | /* | |
303 | * This function combines the previous ones: look up a certificate ID and if | |
304 | * found extract status information. Return 0 is successful. | |
0b33bc65 DSH |
305 | */ |
306 | ||
307 | int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, | |
0f113f3e MC |
308 | int *reason, |
309 | ASN1_GENERALIZEDTIME **revtime, | |
310 | ASN1_GENERALIZEDTIME **thisupd, | |
311 | ASN1_GENERALIZEDTIME **nextupd) | |
312 | { | |
313 | int i; | |
314 | OCSP_SINGLERESP *single; | |
315 | i = OCSP_resp_find(bs, id, -1); | |
316 | /* Maybe check for multiple responses and give an error? */ | |
317 | if (i < 0) | |
318 | return 0; | |
319 | single = OCSP_resp_get0(bs, i); | |
320 | i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); | |
321 | if (status) | |
322 | *status = i; | |
323 | return 1; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Check validity of thisUpdate and nextUpdate fields. It is possible that | |
328 | * the request will take a few seconds to process and/or the time wont be | |
329 | * totally accurate. Therefore to avoid rejecting otherwise valid time we | |
330 | * allow the times to be within 'nsec' of the current time. Also to avoid | |
331 | * accepting very old responses without a nextUpdate field an optional maxage | |
f1965221 DSH |
332 | * parameter specifies the maximum age the thisUpdate field can be. |
333 | */ | |
334 | ||
0f113f3e MC |
335 | int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, |
336 | ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec) | |
337 | { | |
338 | int ret = 1; | |
339 | time_t t_now, t_tmp; | |
340 | time(&t_now); | |
341 | /* Check thisUpdate is valid and not more than nsec in the future */ | |
342 | if (!ASN1_GENERALIZEDTIME_check(thisupd)) { | |
343 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD); | |
344 | ret = 0; | |
345 | } else { | |
346 | t_tmp = t_now + nsec; | |
347 | if (X509_cmp_time(thisupd, &t_tmp) > 0) { | |
348 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID); | |
349 | ret = 0; | |
350 | } | |
351 | ||
352 | /* | |
353 | * If maxsec specified check thisUpdate is not more than maxsec in | |
354 | * the past | |
355 | */ | |
356 | if (maxsec >= 0) { | |
357 | t_tmp = t_now - maxsec; | |
358 | if (X509_cmp_time(thisupd, &t_tmp) < 0) { | |
359 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD); | |
360 | ret = 0; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | if (!nextupd) | |
366 | return ret; | |
367 | ||
368 | /* Check nextUpdate is valid and not more than nsec in the past */ | |
369 | if (!ASN1_GENERALIZEDTIME_check(nextupd)) { | |
370 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD); | |
371 | ret = 0; | |
372 | } else { | |
373 | t_tmp = t_now - nsec; | |
374 | if (X509_cmp_time(nextupd, &t_tmp) < 0) { | |
375 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED); | |
376 | ret = 0; | |
377 | } | |
378 | } | |
379 | ||
380 | /* Also don't allow nextUpdate to precede thisUpdate */ | |
381 | if (ASN1_STRING_cmp(nextupd, thisupd) < 0) { | |
382 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, | |
383 | OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE); | |
384 | ret = 0; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } |