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0f113f3e | 1 | /* |
1212818e | 2 | * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. |
0b33bc65 | 3 | * |
0c496700 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
0b33bc65 DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
f1965221 | 11 | #include <time.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
db17e43d | 13 | #include <openssl/asn1.h> |
0b33bc65 | 14 | #include <openssl/objects.h> |
0b33bc65 DSH |
15 | #include <openssl/x509.h> |
16 | #include <openssl/pem.h> | |
17 | #include <openssl/x509v3.h> | |
18 | #include <openssl/ocsp.h> | |
6ef869d7 | 19 | #include "ocsp_lcl.h" |
0b33bc65 | 20 | |
0f113f3e MC |
21 | /* |
22 | * Utility functions related to sending OCSP requests and extracting relevant | |
23 | * information from the response. | |
0b33bc65 DSH |
24 | */ |
25 | ||
0f113f3e MC |
26 | /* |
27 | * Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer: | |
28 | * useful if we want to add extensions. | |
0b33bc65 DSH |
29 | */ |
30 | ||
31 | OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) | |
0f113f3e MC |
32 | { |
33 | OCSP_ONEREQ *one = NULL; | |
34 | ||
75ebbd9a | 35 | if ((one = OCSP_ONEREQ_new()) == NULL) |
68efafc5 | 36 | return NULL; |
25aaa98a | 37 | OCSP_CERTID_free(one->reqCert); |
0f113f3e | 38 | one->reqCert = cid; |
415e7c48 TS |
39 | if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest.requestList, one)) { |
40 | one->reqCert = NULL; /* do not free on error */ | |
0f113f3e | 41 | goto err; |
415e7c48 | 42 | } |
0f113f3e MC |
43 | return one; |
44 | err: | |
45 | OCSP_ONEREQ_free(one); | |
46 | return NULL; | |
47 | } | |
0b33bc65 DSH |
48 | |
49 | /* Set requestorName from an X509_NAME structure */ | |
50 | ||
51 | int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm) | |
0f113f3e MC |
52 | { |
53 | GENERAL_NAME *gen; | |
25aaa98a | 54 | |
0f113f3e MC |
55 | gen = GENERAL_NAME_new(); |
56 | if (gen == NULL) | |
57 | return 0; | |
58 | if (!X509_NAME_set(&gen->d.directoryName, nm)) { | |
59 | GENERAL_NAME_free(gen); | |
60 | return 0; | |
61 | } | |
62 | gen->type = GEN_DIRNAME; | |
a332635e DSH |
63 | GENERAL_NAME_free(req->tbsRequest.requestorName); |
64 | req->tbsRequest.requestorName = gen; | |
0f113f3e MC |
65 | return 1; |
66 | } | |
0b33bc65 DSH |
67 | |
68 | /* Add a certificate to an OCSP request */ | |
69 | ||
70 | int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert) | |
0f113f3e MC |
71 | { |
72 | OCSP_SIGNATURE *sig; | |
90945fa3 | 73 | if (req->optionalSignature == NULL) |
0f113f3e MC |
74 | req->optionalSignature = OCSP_SIGNATURE_new(); |
75 | sig = req->optionalSignature; | |
90945fa3 | 76 | if (sig == NULL) |
0f113f3e | 77 | return 0; |
90945fa3 | 78 | if (cert == NULL) |
0f113f3e | 79 | return 1; |
75ebbd9a RS |
80 | if (sig->certs == NULL |
81 | && (sig->certs = sk_X509_new_null()) == NULL) | |
0f113f3e MC |
82 | return 0; |
83 | ||
84 | if (!sk_X509_push(sig->certs, cert)) | |
85 | return 0; | |
05f0fb9f | 86 | X509_up_ref(cert); |
0f113f3e MC |
87 | return 1; |
88 | } | |
89 | ||
90 | /* | |
0d4fb843 | 91 | * Sign an OCSP request set the requestorName to the subject name of an |
0f113f3e MC |
92 | * optional signers certificate and include one or more optional certificates |
93 | * in the request. Behaves like PKCS7_sign(). | |
0b33bc65 DSH |
94 | */ |
95 | ||
0f113f3e MC |
96 | int OCSP_request_sign(OCSP_REQUEST *req, |
97 | X509 *signer, | |
98 | EVP_PKEY *key, | |
99 | const EVP_MD *dgst, | |
100 | STACK_OF(X509) *certs, unsigned long flags) | |
101 | { | |
102 | int i; | |
103 | X509 *x; | |
104 | ||
105 | if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) | |
106 | goto err; | |
107 | ||
75ebbd9a | 108 | if ((req->optionalSignature = OCSP_SIGNATURE_new()) == NULL) |
0f113f3e MC |
109 | goto err; |
110 | if (key) { | |
111 | if (!X509_check_private_key(signer, key)) { | |
112 | OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, | |
113 | OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
114 | goto err; | |
115 | } | |
116 | if (!OCSP_REQUEST_sign(req, key, dgst)) | |
117 | goto err; | |
118 | } | |
119 | ||
120 | if (!(flags & OCSP_NOCERTS)) { | |
121 | if (!OCSP_request_add1_cert(req, signer)) | |
122 | goto err; | |
123 | for (i = 0; i < sk_X509_num(certs); i++) { | |
124 | x = sk_X509_value(certs, i); | |
125 | if (!OCSP_request_add1_cert(req, x)) | |
126 | goto err; | |
127 | } | |
128 | } | |
129 | ||
130 | return 1; | |
131 | err: | |
132 | OCSP_SIGNATURE_free(req->optionalSignature); | |
133 | req->optionalSignature = NULL; | |
134 | return 0; | |
135 | } | |
0b33bc65 DSH |
136 | |
137 | /* Get response status */ | |
138 | ||
139 | int OCSP_response_status(OCSP_RESPONSE *resp) | |
0f113f3e MC |
140 | { |
141 | return ASN1_ENUMERATED_get(resp->responseStatus); | |
142 | } | |
0b33bc65 | 143 | |
0f113f3e MC |
144 | /* |
145 | * Extract basic response from OCSP_RESPONSE or NULL if no basic response | |
146 | * present. | |
0b33bc65 | 147 | */ |
0b33bc65 DSH |
148 | |
149 | OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) | |
0f113f3e MC |
150 | { |
151 | OCSP_RESPBYTES *rb; | |
152 | rb = resp->responseBytes; | |
153 | if (!rb) { | |
154 | OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA); | |
155 | return NULL; | |
156 | } | |
157 | if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) { | |
158 | OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE); | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); | |
163 | } | |
164 | ||
79613ea8 | 165 | const ASN1_OCTET_STRING *OCSP_resp_get0_signature(const OCSP_BASICRESP *bs) |
6ef869d7 DSH |
166 | { |
167 | return bs->signature; | |
168 | } | |
169 | ||
20c36721 PK |
170 | const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *bs) |
171 | { | |
172 | return &bs->signatureAlgorithm; | |
173 | } | |
174 | ||
175 | const OCSP_RESPDATA *OCSP_resp_get0_respdata(const OCSP_BASICRESP *bs) | |
176 | { | |
177 | return &bs->tbsResponseData; | |
178 | } | |
179 | ||
0f113f3e | 180 | /* |
0d4fb843 | 181 | * Return number of OCSP_SINGLERESP responses present in a basic response. |
0b33bc65 DSH |
182 | */ |
183 | ||
184 | int OCSP_resp_count(OCSP_BASICRESP *bs) | |
0f113f3e MC |
185 | { |
186 | if (!bs) | |
187 | return -1; | |
a332635e | 188 | return sk_OCSP_SINGLERESP_num(bs->tbsResponseData.responses); |
0f113f3e | 189 | } |
0b33bc65 DSH |
190 | |
191 | /* Extract an OCSP_SINGLERESP response with a given index */ | |
192 | ||
193 | OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) | |
0f113f3e MC |
194 | { |
195 | if (!bs) | |
196 | return NULL; | |
a332635e | 197 | return sk_OCSP_SINGLERESP_value(bs->tbsResponseData.responses, idx); |
0f113f3e | 198 | } |
0b33bc65 | 199 | |
79613ea8 | 200 | const ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(const OCSP_BASICRESP* bs) |
9e5cd4ba | 201 | { |
9e5cd4ba RS |
202 | return bs->tbsResponseData.producedAt; |
203 | } | |
204 | ||
02fb7cfe DSH |
205 | const STACK_OF(X509) *OCSP_resp_get0_certs(const OCSP_BASICRESP *bs) |
206 | { | |
207 | return bs->certs; | |
208 | } | |
209 | ||
210 | int OCSP_resp_get0_id(const OCSP_BASICRESP *bs, | |
211 | const ASN1_OCTET_STRING **pid, | |
212 | const X509_NAME **pname) | |
02fb7cfe DSH |
213 | { |
214 | const OCSP_RESPID *rid = &bs->tbsResponseData.responderId; | |
db17e43d | 215 | |
02fb7cfe DSH |
216 | if (rid->type == V_OCSP_RESPID_NAME) { |
217 | *pname = rid->value.byName; | |
218 | *pid = NULL; | |
219 | } else if (rid->type == V_OCSP_RESPID_KEY) { | |
220 | *pid = rid->value.byKey; | |
221 | *pname = NULL; | |
222 | } else { | |
223 | return 0; | |
224 | } | |
225 | return 1; | |
226 | } | |
227 | ||
db17e43d SS |
228 | int OCSP_resp_get1_id(const OCSP_BASICRESP *bs, |
229 | ASN1_OCTET_STRING **pid, | |
230 | X509_NAME **pname) | |
231 | { | |
232 | const OCSP_RESPID *rid = &bs->tbsResponseData.responderId; | |
233 | ||
234 | if (rid->type == V_OCSP_RESPID_NAME) { | |
235 | *pname = X509_NAME_dup(rid->value.byName); | |
236 | *pid = NULL; | |
237 | } else if (rid->type == V_OCSP_RESPID_KEY) { | |
238 | *pid = ASN1_OCTET_STRING_dup(rid->value.byKey); | |
239 | *pname = NULL; | |
240 | } else { | |
241 | return 0; | |
242 | } | |
c91ec013 | 243 | if (*pname == NULL && *pid == NULL) |
db17e43d SS |
244 | return 0; |
245 | return 1; | |
246 | } | |
247 | ||
0b33bc65 DSH |
248 | /* Look single response matching a given certificate ID */ |
249 | ||
250 | int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) | |
0f113f3e MC |
251 | { |
252 | int i; | |
253 | STACK_OF(OCSP_SINGLERESP) *sresp; | |
254 | OCSP_SINGLERESP *single; | |
255 | if (!bs) | |
256 | return -1; | |
257 | if (last < 0) | |
258 | last = 0; | |
259 | else | |
260 | last++; | |
a332635e | 261 | sresp = bs->tbsResponseData.responses; |
0f113f3e MC |
262 | for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) { |
263 | single = sk_OCSP_SINGLERESP_value(sresp, i); | |
264 | if (!OCSP_id_cmp(id, single->certId)) | |
265 | return i; | |
266 | } | |
267 | return -1; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Extract status information from an OCSP_SINGLERESP structure. Note: the | |
272 | * revtime and reason values are only set if the certificate status is | |
273 | * revoked. Returns numerical value of status. | |
0b33bc65 DSH |
274 | */ |
275 | ||
276 | int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, | |
0f113f3e MC |
277 | ASN1_GENERALIZEDTIME **revtime, |
278 | ASN1_GENERALIZEDTIME **thisupd, | |
279 | ASN1_GENERALIZEDTIME **nextupd) | |
280 | { | |
281 | int ret; | |
282 | OCSP_CERTSTATUS *cst; | |
283 | if (!single) | |
284 | return -1; | |
285 | cst = single->certStatus; | |
286 | ret = cst->type; | |
287 | if (ret == V_OCSP_CERTSTATUS_REVOKED) { | |
288 | OCSP_REVOKEDINFO *rev = cst->value.revoked; | |
289 | if (revtime) | |
290 | *revtime = rev->revocationTime; | |
291 | if (reason) { | |
292 | if (rev->revocationReason) | |
293 | *reason = ASN1_ENUMERATED_get(rev->revocationReason); | |
294 | else | |
295 | *reason = -1; | |
296 | } | |
297 | } | |
298 | if (thisupd) | |
299 | *thisupd = single->thisUpdate; | |
300 | if (nextupd) | |
301 | *nextupd = single->nextUpdate; | |
302 | return ret; | |
303 | } | |
304 | ||
305 | /* | |
306 | * This function combines the previous ones: look up a certificate ID and if | |
307 | * found extract status information. Return 0 is successful. | |
0b33bc65 DSH |
308 | */ |
309 | ||
310 | int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, | |
0f113f3e MC |
311 | int *reason, |
312 | ASN1_GENERALIZEDTIME **revtime, | |
313 | ASN1_GENERALIZEDTIME **thisupd, | |
314 | ASN1_GENERALIZEDTIME **nextupd) | |
315 | { | |
316 | int i; | |
317 | OCSP_SINGLERESP *single; | |
318 | i = OCSP_resp_find(bs, id, -1); | |
319 | /* Maybe check for multiple responses and give an error? */ | |
320 | if (i < 0) | |
321 | return 0; | |
322 | single = OCSP_resp_get0(bs, i); | |
323 | i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); | |
324 | if (status) | |
325 | *status = i; | |
326 | return 1; | |
327 | } | |
328 | ||
329 | /* | |
330 | * Check validity of thisUpdate and nextUpdate fields. It is possible that | |
60250017 | 331 | * the request will take a few seconds to process and/or the time won't be |
0f113f3e MC |
332 | * totally accurate. Therefore to avoid rejecting otherwise valid time we |
333 | * allow the times to be within 'nsec' of the current time. Also to avoid | |
334 | * accepting very old responses without a nextUpdate field an optional maxage | |
f1965221 DSH |
335 | * parameter specifies the maximum age the thisUpdate field can be. |
336 | */ | |
337 | ||
0f113f3e MC |
338 | int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, |
339 | ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec) | |
340 | { | |
341 | int ret = 1; | |
342 | time_t t_now, t_tmp; | |
343 | time(&t_now); | |
344 | /* Check thisUpdate is valid and not more than nsec in the future */ | |
345 | if (!ASN1_GENERALIZEDTIME_check(thisupd)) { | |
346 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD); | |
347 | ret = 0; | |
348 | } else { | |
349 | t_tmp = t_now + nsec; | |
350 | if (X509_cmp_time(thisupd, &t_tmp) > 0) { | |
351 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID); | |
352 | ret = 0; | |
353 | } | |
354 | ||
355 | /* | |
356 | * If maxsec specified check thisUpdate is not more than maxsec in | |
357 | * the past | |
358 | */ | |
359 | if (maxsec >= 0) { | |
360 | t_tmp = t_now - maxsec; | |
361 | if (X509_cmp_time(thisupd, &t_tmp) < 0) { | |
362 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD); | |
363 | ret = 0; | |
364 | } | |
365 | } | |
366 | } | |
367 | ||
368 | if (!nextupd) | |
369 | return ret; | |
370 | ||
371 | /* Check nextUpdate is valid and not more than nsec in the past */ | |
372 | if (!ASN1_GENERALIZEDTIME_check(nextupd)) { | |
373 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD); | |
374 | ret = 0; | |
375 | } else { | |
376 | t_tmp = t_now - nsec; | |
377 | if (X509_cmp_time(nextupd, &t_tmp) < 0) { | |
378 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED); | |
379 | ret = 0; | |
380 | } | |
381 | } | |
382 | ||
383 | /* Also don't allow nextUpdate to precede thisUpdate */ | |
384 | if (ASN1_STRING_cmp(nextupd, thisupd) < 0) { | |
385 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, | |
386 | OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE); | |
387 | ret = 0; | |
388 | } | |
389 | ||
390 | return ret; | |
391 | } | |
9e5cd4ba | 392 | |
79613ea8 | 393 | const OCSP_CERTID *OCSP_SINGLERESP_get0_id(const OCSP_SINGLERESP *single) |
9e5cd4ba RS |
394 | { |
395 | return single->certId; | |
396 | } |