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0f113f3e | 1 | /* |
b1322259 | 2 | * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. |
0b33bc65 | 3 | * |
b1322259 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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" |
0b33bc65 | 13 | #include <openssl/objects.h> |
0b33bc65 DSH |
14 | #include <openssl/x509.h> |
15 | #include <openssl/pem.h> | |
16 | #include <openssl/x509v3.h> | |
17 | #include <openssl/ocsp.h> | |
6ef869d7 | 18 | #include "ocsp_lcl.h" |
0b33bc65 | 19 | |
0f113f3e MC |
20 | /* |
21 | * Utility functions related to sending OCSP requests and extracting relevant | |
22 | * information from the response. | |
0b33bc65 DSH |
23 | */ |
24 | ||
0f113f3e MC |
25 | /* |
26 | * Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer: | |
27 | * useful if we want to add extensions. | |
0b33bc65 DSH |
28 | */ |
29 | ||
30 | OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) | |
0f113f3e MC |
31 | { |
32 | OCSP_ONEREQ *one = NULL; | |
33 | ||
75ebbd9a | 34 | if ((one = OCSP_ONEREQ_new()) == NULL) |
68efafc5 | 35 | return NULL; |
25aaa98a | 36 | OCSP_CERTID_free(one->reqCert); |
0f113f3e | 37 | one->reqCert = cid; |
415e7c48 TS |
38 | if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest.requestList, one)) { |
39 | one->reqCert = NULL; /* do not free on error */ | |
0f113f3e | 40 | goto err; |
415e7c48 | 41 | } |
0f113f3e MC |
42 | return one; |
43 | err: | |
44 | OCSP_ONEREQ_free(one); | |
45 | return NULL; | |
46 | } | |
0b33bc65 DSH |
47 | |
48 | /* Set requestorName from an X509_NAME structure */ | |
49 | ||
50 | int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm) | |
0f113f3e MC |
51 | { |
52 | GENERAL_NAME *gen; | |
25aaa98a | 53 | |
0f113f3e MC |
54 | gen = GENERAL_NAME_new(); |
55 | if (gen == NULL) | |
56 | return 0; | |
57 | if (!X509_NAME_set(&gen->d.directoryName, nm)) { | |
58 | GENERAL_NAME_free(gen); | |
59 | return 0; | |
60 | } | |
61 | gen->type = GEN_DIRNAME; | |
a332635e DSH |
62 | GENERAL_NAME_free(req->tbsRequest.requestorName); |
63 | req->tbsRequest.requestorName = gen; | |
0f113f3e MC |
64 | return 1; |
65 | } | |
0b33bc65 DSH |
66 | |
67 | /* Add a certificate to an OCSP request */ | |
68 | ||
69 | int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert) | |
0f113f3e MC |
70 | { |
71 | OCSP_SIGNATURE *sig; | |
90945fa3 | 72 | if (req->optionalSignature == NULL) |
0f113f3e MC |
73 | req->optionalSignature = OCSP_SIGNATURE_new(); |
74 | sig = req->optionalSignature; | |
90945fa3 | 75 | if (sig == NULL) |
0f113f3e | 76 | return 0; |
90945fa3 | 77 | if (cert == NULL) |
0f113f3e | 78 | return 1; |
75ebbd9a RS |
79 | if (sig->certs == NULL |
80 | && (sig->certs = sk_X509_new_null()) == NULL) | |
0f113f3e MC |
81 | return 0; |
82 | ||
83 | if (!sk_X509_push(sig->certs, cert)) | |
84 | return 0; | |
05f0fb9f | 85 | X509_up_ref(cert); |
0f113f3e MC |
86 | return 1; |
87 | } | |
88 | ||
89 | /* | |
0d4fb843 | 90 | * Sign an OCSP request set the requestorName to the subject name of an |
0f113f3e MC |
91 | * optional signers certificate and include one or more optional certificates |
92 | * in the request. Behaves like PKCS7_sign(). | |
0b33bc65 DSH |
93 | */ |
94 | ||
0f113f3e MC |
95 | int OCSP_request_sign(OCSP_REQUEST *req, |
96 | X509 *signer, | |
97 | EVP_PKEY *key, | |
98 | const EVP_MD *dgst, | |
99 | STACK_OF(X509) *certs, unsigned long flags) | |
100 | { | |
101 | int i; | |
102 | X509 *x; | |
103 | ||
104 | if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) | |
105 | goto err; | |
106 | ||
75ebbd9a | 107 | if ((req->optionalSignature = OCSP_SIGNATURE_new()) == NULL) |
0f113f3e MC |
108 | goto err; |
109 | if (key) { | |
110 | if (!X509_check_private_key(signer, key)) { | |
111 | OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, | |
112 | OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
113 | goto err; | |
114 | } | |
115 | if (!OCSP_REQUEST_sign(req, key, dgst)) | |
116 | goto err; | |
117 | } | |
118 | ||
119 | if (!(flags & OCSP_NOCERTS)) { | |
120 | if (!OCSP_request_add1_cert(req, signer)) | |
121 | goto err; | |
122 | for (i = 0; i < sk_X509_num(certs); i++) { | |
123 | x = sk_X509_value(certs, i); | |
124 | if (!OCSP_request_add1_cert(req, x)) | |
125 | goto err; | |
126 | } | |
127 | } | |
128 | ||
129 | return 1; | |
130 | err: | |
131 | OCSP_SIGNATURE_free(req->optionalSignature); | |
132 | req->optionalSignature = NULL; | |
133 | return 0; | |
134 | } | |
0b33bc65 DSH |
135 | |
136 | /* Get response status */ | |
137 | ||
138 | int OCSP_response_status(OCSP_RESPONSE *resp) | |
0f113f3e MC |
139 | { |
140 | return ASN1_ENUMERATED_get(resp->responseStatus); | |
141 | } | |
0b33bc65 | 142 | |
0f113f3e MC |
143 | /* |
144 | * Extract basic response from OCSP_RESPONSE or NULL if no basic response | |
145 | * present. | |
0b33bc65 | 146 | */ |
0b33bc65 DSH |
147 | |
148 | OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) | |
0f113f3e MC |
149 | { |
150 | OCSP_RESPBYTES *rb; | |
151 | rb = resp->responseBytes; | |
152 | if (!rb) { | |
153 | OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA); | |
154 | return NULL; | |
155 | } | |
156 | if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) { | |
157 | OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE); | |
158 | return NULL; | |
159 | } | |
160 | ||
161 | return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); | |
162 | } | |
163 | ||
6ef869d7 DSH |
164 | ASN1_OCTET_STRING *OCSP_resp_get0_signature(OCSP_BASICRESP *bs) |
165 | { | |
166 | return bs->signature; | |
167 | } | |
168 | ||
0f113f3e | 169 | /* |
0d4fb843 | 170 | * Return number of OCSP_SINGLERESP responses present in a basic response. |
0b33bc65 DSH |
171 | */ |
172 | ||
173 | int OCSP_resp_count(OCSP_BASICRESP *bs) | |
0f113f3e MC |
174 | { |
175 | if (!bs) | |
176 | return -1; | |
a332635e | 177 | return sk_OCSP_SINGLERESP_num(bs->tbsResponseData.responses); |
0f113f3e | 178 | } |
0b33bc65 DSH |
179 | |
180 | /* Extract an OCSP_SINGLERESP response with a given index */ | |
181 | ||
182 | OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) | |
0f113f3e MC |
183 | { |
184 | if (!bs) | |
185 | return NULL; | |
a332635e | 186 | return sk_OCSP_SINGLERESP_value(bs->tbsResponseData.responses, idx); |
0f113f3e | 187 | } |
0b33bc65 | 188 | |
213f60bf | 189 | ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(OCSP_BASICRESP* bs) |
9e5cd4ba RS |
190 | { |
191 | if (!bs) | |
192 | return NULL; | |
193 | return bs->tbsResponseData.producedAt; | |
194 | } | |
195 | ||
02fb7cfe DSH |
196 | const STACK_OF(X509) *OCSP_resp_get0_certs(const OCSP_BASICRESP *bs) |
197 | { | |
198 | return bs->certs; | |
199 | } | |
200 | ||
201 | int OCSP_resp_get0_id(const OCSP_BASICRESP *bs, | |
202 | const ASN1_OCTET_STRING **pid, | |
203 | const X509_NAME **pname) | |
204 | ||
205 | { | |
206 | const OCSP_RESPID *rid = &bs->tbsResponseData.responderId; | |
207 | if (rid->type == V_OCSP_RESPID_NAME) { | |
208 | *pname = rid->value.byName; | |
209 | *pid = NULL; | |
210 | } else if (rid->type == V_OCSP_RESPID_KEY) { | |
211 | *pid = rid->value.byKey; | |
212 | *pname = NULL; | |
213 | } else { | |
214 | return 0; | |
215 | } | |
216 | return 1; | |
217 | } | |
218 | ||
0b33bc65 DSH |
219 | /* Look single response matching a given certificate ID */ |
220 | ||
221 | int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) | |
0f113f3e MC |
222 | { |
223 | int i; | |
224 | STACK_OF(OCSP_SINGLERESP) *sresp; | |
225 | OCSP_SINGLERESP *single; | |
226 | if (!bs) | |
227 | return -1; | |
228 | if (last < 0) | |
229 | last = 0; | |
230 | else | |
231 | last++; | |
a332635e | 232 | sresp = bs->tbsResponseData.responses; |
0f113f3e MC |
233 | for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) { |
234 | single = sk_OCSP_SINGLERESP_value(sresp, i); | |
235 | if (!OCSP_id_cmp(id, single->certId)) | |
236 | return i; | |
237 | } | |
238 | return -1; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Extract status information from an OCSP_SINGLERESP structure. Note: the | |
243 | * revtime and reason values are only set if the certificate status is | |
244 | * revoked. Returns numerical value of status. | |
0b33bc65 DSH |
245 | */ |
246 | ||
247 | int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, | |
0f113f3e MC |
248 | ASN1_GENERALIZEDTIME **revtime, |
249 | ASN1_GENERALIZEDTIME **thisupd, | |
250 | ASN1_GENERALIZEDTIME **nextupd) | |
251 | { | |
252 | int ret; | |
253 | OCSP_CERTSTATUS *cst; | |
254 | if (!single) | |
255 | return -1; | |
256 | cst = single->certStatus; | |
257 | ret = cst->type; | |
258 | if (ret == V_OCSP_CERTSTATUS_REVOKED) { | |
259 | OCSP_REVOKEDINFO *rev = cst->value.revoked; | |
260 | if (revtime) | |
261 | *revtime = rev->revocationTime; | |
262 | if (reason) { | |
263 | if (rev->revocationReason) | |
264 | *reason = ASN1_ENUMERATED_get(rev->revocationReason); | |
265 | else | |
266 | *reason = -1; | |
267 | } | |
268 | } | |
269 | if (thisupd) | |
270 | *thisupd = single->thisUpdate; | |
271 | if (nextupd) | |
272 | *nextupd = single->nextUpdate; | |
273 | return ret; | |
274 | } | |
275 | ||
276 | /* | |
277 | * This function combines the previous ones: look up a certificate ID and if | |
278 | * found extract status information. Return 0 is successful. | |
0b33bc65 DSH |
279 | */ |
280 | ||
281 | int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, | |
0f113f3e MC |
282 | int *reason, |
283 | ASN1_GENERALIZEDTIME **revtime, | |
284 | ASN1_GENERALIZEDTIME **thisupd, | |
285 | ASN1_GENERALIZEDTIME **nextupd) | |
286 | { | |
287 | int i; | |
288 | OCSP_SINGLERESP *single; | |
289 | i = OCSP_resp_find(bs, id, -1); | |
290 | /* Maybe check for multiple responses and give an error? */ | |
291 | if (i < 0) | |
292 | return 0; | |
293 | single = OCSP_resp_get0(bs, i); | |
294 | i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); | |
295 | if (status) | |
296 | *status = i; | |
297 | return 1; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Check validity of thisUpdate and nextUpdate fields. It is possible that | |
302 | * the request will take a few seconds to process and/or the time wont be | |
303 | * totally accurate. Therefore to avoid rejecting otherwise valid time we | |
304 | * allow the times to be within 'nsec' of the current time. Also to avoid | |
305 | * accepting very old responses without a nextUpdate field an optional maxage | |
f1965221 DSH |
306 | * parameter specifies the maximum age the thisUpdate field can be. |
307 | */ | |
308 | ||
0f113f3e MC |
309 | int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, |
310 | ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec) | |
311 | { | |
312 | int ret = 1; | |
313 | time_t t_now, t_tmp; | |
314 | time(&t_now); | |
315 | /* Check thisUpdate is valid and not more than nsec in the future */ | |
316 | if (!ASN1_GENERALIZEDTIME_check(thisupd)) { | |
317 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD); | |
318 | ret = 0; | |
319 | } else { | |
320 | t_tmp = t_now + nsec; | |
321 | if (X509_cmp_time(thisupd, &t_tmp) > 0) { | |
322 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID); | |
323 | ret = 0; | |
324 | } | |
325 | ||
326 | /* | |
327 | * If maxsec specified check thisUpdate is not more than maxsec in | |
328 | * the past | |
329 | */ | |
330 | if (maxsec >= 0) { | |
331 | t_tmp = t_now - maxsec; | |
332 | if (X509_cmp_time(thisupd, &t_tmp) < 0) { | |
333 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD); | |
334 | ret = 0; | |
335 | } | |
336 | } | |
337 | } | |
338 | ||
339 | if (!nextupd) | |
340 | return ret; | |
341 | ||
342 | /* Check nextUpdate is valid and not more than nsec in the past */ | |
343 | if (!ASN1_GENERALIZEDTIME_check(nextupd)) { | |
344 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD); | |
345 | ret = 0; | |
346 | } else { | |
347 | t_tmp = t_now - nsec; | |
348 | if (X509_cmp_time(nextupd, &t_tmp) < 0) { | |
349 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED); | |
350 | ret = 0; | |
351 | } | |
352 | } | |
353 | ||
354 | /* Also don't allow nextUpdate to precede thisUpdate */ | |
355 | if (ASN1_STRING_cmp(nextupd, thisupd) < 0) { | |
356 | OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, | |
357 | OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE); | |
358 | ret = 0; | |
359 | } | |
360 | ||
361 | return ret; | |
362 | } | |
9e5cd4ba RS |
363 | |
364 | OCSP_CERTID *OCSP_SINGLERESP_get0_id(OCSP_SINGLERESP *single) | |
365 | { | |
366 | return single->certId; | |
367 | } |