/src/openssl/crypto/ocsp/ocsp_cl.c
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1 | | /* |
2 | | * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
4 | | * Licensed under the Apache License 2.0 (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 |
8 | | */ |
9 | | |
10 | | #include <stdio.h> |
11 | | #include <time.h> |
12 | | #include "internal/cryptlib.h" |
13 | | #include <openssl/asn1.h> |
14 | | #include <openssl/objects.h> |
15 | | #include <openssl/x509.h> |
16 | | #include <openssl/pem.h> |
17 | | #include <openssl/x509v3.h> |
18 | | #include <openssl/ocsp.h> |
19 | | #include <openssl/posix_time.h> |
20 | | #include "ocsp_local.h" |
21 | | |
22 | | /* |
23 | | * Utility functions related to sending OCSP requests and extracting relevant |
24 | | * information from the response. |
25 | | */ |
26 | | |
27 | | /* |
28 | | * Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer: |
29 | | * useful if we want to add extensions. |
30 | | */ |
31 | | OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) |
32 | 0 | { |
33 | 0 | OCSP_ONEREQ *one = NULL; |
34 | |
|
35 | 0 | if ((one = OCSP_ONEREQ_new()) == NULL) |
36 | 0 | return NULL; |
37 | 0 | OCSP_CERTID_free(one->reqCert); |
38 | 0 | one->reqCert = cid; |
39 | 0 | if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest.requestList, one)) { |
40 | 0 | one->reqCert = NULL; /* do not free on error */ |
41 | 0 | OCSP_ONEREQ_free(one); |
42 | 0 | return NULL; |
43 | 0 | } |
44 | 0 | return one; |
45 | 0 | } |
46 | | |
47 | | /* Set requestorName from an X509_NAME structure */ |
48 | | int OCSP_request_set1_name(OCSP_REQUEST *req, const X509_NAME *nm) |
49 | 0 | { |
50 | 0 | return GENERAL_NAME_set1_X509_NAME(&req->tbsRequest.requestorName, nm); |
51 | 0 | } |
52 | | |
53 | | /* Add a certificate to an OCSP request */ |
54 | | int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert) |
55 | 0 | { |
56 | 0 | if (req->optionalSignature == NULL |
57 | 0 | && (req->optionalSignature = OCSP_SIGNATURE_new()) == NULL) |
58 | 0 | return 0; |
59 | 0 | if (cert == NULL) |
60 | 0 | return 1; |
61 | 0 | return ossl_x509_add_cert_new(&req->optionalSignature->certs, cert, |
62 | 0 | X509_ADD_FLAG_UP_REF); |
63 | 0 | } |
64 | | |
65 | | /* |
66 | | * Sign an OCSP request set the requestorName to the subject name of an |
67 | | * optional signers certificate and include one or more optional certificates |
68 | | * in the request. Behaves like PKCS7_sign(). |
69 | | */ |
70 | | int OCSP_request_sign(OCSP_REQUEST *req, |
71 | | X509 *signer, |
72 | | EVP_PKEY *key, |
73 | | const EVP_MD *dgst, |
74 | | STACK_OF(X509) *certs, unsigned long flags) |
75 | 0 | { |
76 | 0 | if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) |
77 | 0 | goto err; |
78 | | |
79 | 0 | if ((req->optionalSignature = OCSP_SIGNATURE_new()) == NULL) |
80 | 0 | goto err; |
81 | 0 | if (key != NULL) { |
82 | 0 | if (!X509_check_private_key(signer, key)) { |
83 | 0 | ERR_raise(ERR_LIB_OCSP, |
84 | 0 | OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); |
85 | 0 | goto err; |
86 | 0 | } |
87 | 0 | if (!OCSP_REQUEST_sign(req, key, dgst, signer->libctx, signer->propq)) |
88 | 0 | goto err; |
89 | 0 | } |
90 | | |
91 | 0 | if ((flags & OCSP_NOCERTS) == 0) { |
92 | 0 | if (!OCSP_request_add1_cert(req, signer) |
93 | 0 | || !X509_add_certs(req->optionalSignature->certs, certs, |
94 | 0 | X509_ADD_FLAG_UP_REF)) |
95 | 0 | goto err; |
96 | 0 | } |
97 | | |
98 | 0 | return 1; |
99 | 0 | err: |
100 | 0 | OCSP_SIGNATURE_free(req->optionalSignature); |
101 | 0 | req->optionalSignature = NULL; |
102 | 0 | return 0; |
103 | 0 | } |
104 | | |
105 | | /* Get response status */ |
106 | | int OCSP_response_status(OCSP_RESPONSE *resp) |
107 | 0 | { |
108 | 0 | return ASN1_ENUMERATED_get(resp->responseStatus); |
109 | 0 | } |
110 | | |
111 | | /* |
112 | | * Extract basic response from OCSP_RESPONSE or NULL if no basic response |
113 | | * present. |
114 | | */ |
115 | | OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) |
116 | 0 | { |
117 | 0 | OCSP_RESPBYTES *rb = resp->responseBytes; |
118 | |
|
119 | 0 | if (rb == NULL) { |
120 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_NO_RESPONSE_DATA); |
121 | 0 | return NULL; |
122 | 0 | } |
123 | 0 | if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) { |
124 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_NOT_BASIC_RESPONSE); |
125 | 0 | return NULL; |
126 | 0 | } |
127 | | |
128 | 0 | return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); |
129 | 0 | } |
130 | | |
131 | | const ASN1_OCTET_STRING *OCSP_resp_get0_signature(const OCSP_BASICRESP *bs) |
132 | 0 | { |
133 | 0 | return bs->signature; |
134 | 0 | } |
135 | | |
136 | | const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *bs) |
137 | 0 | { |
138 | 0 | return &bs->signatureAlgorithm; |
139 | 0 | } |
140 | | |
141 | | const OCSP_RESPDATA *OCSP_resp_get0_respdata(const OCSP_BASICRESP *bs) |
142 | 0 | { |
143 | 0 | return &bs->tbsResponseData; |
144 | 0 | } |
145 | | |
146 | | /* Return number of OCSP_SINGLERESP responses present in a basic response */ |
147 | | |
148 | | int OCSP_resp_count(OCSP_BASICRESP *bs) |
149 | 0 | { |
150 | 0 | if (bs == NULL) |
151 | 0 | return -1; |
152 | 0 | return sk_OCSP_SINGLERESP_num(bs->tbsResponseData.responses); |
153 | 0 | } |
154 | | |
155 | | /* Extract an OCSP_SINGLERESP response with a given index */ |
156 | | OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) |
157 | 0 | { |
158 | 0 | if (bs == NULL) |
159 | 0 | return NULL; |
160 | 0 | return sk_OCSP_SINGLERESP_value(bs->tbsResponseData.responses, idx); |
161 | 0 | } |
162 | | |
163 | | const ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(const OCSP_BASICRESP *bs) |
164 | 0 | { |
165 | 0 | return bs->tbsResponseData.producedAt; |
166 | 0 | } |
167 | | |
168 | | const STACK_OF(X509) *OCSP_resp_get0_certs(const OCSP_BASICRESP *bs) |
169 | 0 | { |
170 | 0 | return bs->certs; |
171 | 0 | } |
172 | | |
173 | | int OCSP_resp_get0_id(const OCSP_BASICRESP *bs, |
174 | | const ASN1_OCTET_STRING **pid, |
175 | | const X509_NAME **pname) |
176 | 0 | { |
177 | 0 | const OCSP_RESPID *rid = &bs->tbsResponseData.responderId; |
178 | |
|
179 | 0 | if (rid->type == V_OCSP_RESPID_NAME) { |
180 | 0 | *pname = rid->value.byName; |
181 | 0 | *pid = NULL; |
182 | 0 | } else if (rid->type == V_OCSP_RESPID_KEY) { |
183 | 0 | *pid = rid->value.byKey; |
184 | 0 | *pname = NULL; |
185 | 0 | } else { |
186 | 0 | return 0; |
187 | 0 | } |
188 | 0 | return 1; |
189 | 0 | } |
190 | | |
191 | | int OCSP_resp_get1_id(const OCSP_BASICRESP *bs, |
192 | | ASN1_OCTET_STRING **pid, |
193 | | X509_NAME **pname) |
194 | 0 | { |
195 | 0 | const OCSP_RESPID *rid = &bs->tbsResponseData.responderId; |
196 | |
|
197 | 0 | if (rid->type == V_OCSP_RESPID_NAME) { |
198 | 0 | *pname = X509_NAME_dup(rid->value.byName); |
199 | 0 | *pid = NULL; |
200 | 0 | } else if (rid->type == V_OCSP_RESPID_KEY) { |
201 | 0 | *pid = ASN1_OCTET_STRING_dup(rid->value.byKey); |
202 | 0 | *pname = NULL; |
203 | 0 | } else { |
204 | 0 | return 0; |
205 | 0 | } |
206 | 0 | if (*pname == NULL && *pid == NULL) |
207 | 0 | return 0; |
208 | 0 | return 1; |
209 | 0 | } |
210 | | |
211 | | /* Look single response matching a given certificate ID */ |
212 | | int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) |
213 | 0 | { |
214 | 0 | int i; |
215 | 0 | STACK_OF(OCSP_SINGLERESP) *sresp; |
216 | 0 | OCSP_SINGLERESP *single; |
217 | |
|
218 | 0 | if (bs == NULL) |
219 | 0 | return -1; |
220 | 0 | if (last < 0) |
221 | 0 | last = 0; |
222 | 0 | else |
223 | 0 | last++; |
224 | 0 | sresp = bs->tbsResponseData.responses; |
225 | 0 | for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) { |
226 | 0 | single = sk_OCSP_SINGLERESP_value(sresp, i); |
227 | 0 | if (!OCSP_id_cmp(id, single->certId)) |
228 | 0 | return i; |
229 | 0 | } |
230 | 0 | return -1; |
231 | 0 | } |
232 | | |
233 | | /* |
234 | | * Extract status information from an OCSP_SINGLERESP structure. Note: the |
235 | | * revtime and reason values are only set if the certificate status is |
236 | | * revoked. Returns numerical value of status. |
237 | | */ |
238 | | int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, |
239 | | ASN1_GENERALIZEDTIME **revtime, |
240 | | ASN1_GENERALIZEDTIME **thisupd, |
241 | | ASN1_GENERALIZEDTIME **nextupd) |
242 | 0 | { |
243 | 0 | int ret; |
244 | 0 | OCSP_CERTSTATUS *cst; |
245 | |
|
246 | 0 | if (single == NULL) |
247 | 0 | return -1; |
248 | 0 | cst = single->certStatus; |
249 | 0 | ret = cst->type; |
250 | 0 | if (ret == V_OCSP_CERTSTATUS_REVOKED) { |
251 | 0 | OCSP_REVOKEDINFO *rev = cst->value.revoked; |
252 | |
|
253 | 0 | if (revtime) |
254 | 0 | *revtime = rev->revocationTime; |
255 | 0 | if (reason) { |
256 | 0 | if (rev->revocationReason) |
257 | 0 | *reason = ASN1_ENUMERATED_get(rev->revocationReason); |
258 | 0 | else |
259 | 0 | *reason = -1; |
260 | 0 | } |
261 | 0 | } |
262 | 0 | if (thisupd != NULL) |
263 | 0 | *thisupd = single->thisUpdate; |
264 | 0 | if (nextupd != NULL) |
265 | 0 | *nextupd = single->nextUpdate; |
266 | 0 | return ret; |
267 | 0 | } |
268 | | |
269 | | /* |
270 | | * This function combines the previous ones: look up a certificate ID and if |
271 | | * found extract status information. Return 0 is successful. |
272 | | */ |
273 | | int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, |
274 | | int *reason, |
275 | | ASN1_GENERALIZEDTIME **revtime, |
276 | | ASN1_GENERALIZEDTIME **thisupd, |
277 | | ASN1_GENERALIZEDTIME **nextupd) |
278 | 0 | { |
279 | 0 | int i = OCSP_resp_find(bs, id, -1); |
280 | 0 | OCSP_SINGLERESP *single; |
281 | | |
282 | | /* Maybe check for multiple responses and give an error? */ |
283 | 0 | if (i < 0) |
284 | 0 | return 0; |
285 | 0 | single = OCSP_resp_get0(bs, i); |
286 | 0 | i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); |
287 | 0 | if (status != NULL) |
288 | 0 | *status = i; |
289 | 0 | return 1; |
290 | 0 | } |
291 | | |
292 | | static int gentime_to_posix(ASN1_GENERALIZEDTIME *time, int64_t *out_time) |
293 | 0 | { |
294 | 0 | struct tm ctm; |
295 | |
|
296 | 0 | if (!ASN1_GENERALIZEDTIME_check(time)) |
297 | 0 | return 0; |
298 | 0 | if (!ASN1_TIME_to_tm(time, &ctm)) |
299 | 0 | return 0; |
300 | 0 | if (!OPENSSL_tm_to_posix(&ctm, out_time)) |
301 | 0 | return 0; |
302 | | |
303 | 0 | return 1; |
304 | 0 | } |
305 | | |
306 | | /* |
307 | | * Check validity of thisUpdate and nextUpdate fields. It is possible that |
308 | | * the request will take a few seconds to process and/or the time won't be |
309 | | * totally accurate. Therefore to avoid rejecting otherwise valid time we |
310 | | * allow the times to be within 'nsec' of the current time. Also to avoid |
311 | | * accepting very old responses without a nextUpdate field an optional maxage |
312 | | * parameter specifies the maximum age the thisUpdate field can be. |
313 | | */ |
314 | | int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, |
315 | | ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec) |
316 | 0 | { |
317 | 0 | int64_t t_now, this_time, next_time; |
318 | 0 | int ret = 0; |
319 | |
|
320 | 0 | if (nsec < 0) |
321 | 0 | nsec = 0; |
322 | |
|
323 | 0 | t_now = (int64_t)time(NULL); |
324 | | /* Check thisUpdate is valid */ |
325 | 0 | if (!gentime_to_posix(thisupd, &this_time)) { |
326 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_ERROR_IN_THISUPDATE_FIELD); |
327 | 0 | goto err; |
328 | 0 | } |
329 | | /* Check if thisUpdate is more than nsec in the future */ |
330 | 0 | if (this_time > t_now + nsec) { |
331 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_STATUS_NOT_YET_VALID); |
332 | 0 | goto err; |
333 | 0 | } |
334 | | /* |
335 | | * If maxsec specified check thisUpdate is not more than maxsec in |
336 | | * the past |
337 | | */ |
338 | 0 | if (maxsec >= 0 && this_time < t_now - maxsec) { |
339 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_STATUS_TOO_OLD); |
340 | 0 | goto err; |
341 | 0 | } |
342 | 0 | if (nextupd != NULL) { |
343 | | /* Check nextUpdate is valid */ |
344 | 0 | if (!gentime_to_posix(nextupd, &next_time)) { |
345 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD); |
346 | 0 | goto err; |
347 | 0 | } |
348 | | /* Check nextUpdate is not more than nsec in the past */ |
349 | 0 | if (next_time < t_now - nsec) { |
350 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_STATUS_NOT_YET_VALID); |
351 | 0 | goto err; |
352 | 0 | } |
353 | | /* Also don't allow nextUpdate to precede thisUpdate */ |
354 | 0 | if (next_time < this_time) { |
355 | 0 | ERR_raise(ERR_LIB_OCSP, OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE); |
356 | 0 | goto err; |
357 | 0 | } |
358 | 0 | } |
359 | | |
360 | 0 | ret = 1; |
361 | |
|
362 | 0 | err: |
363 | 0 | return ret; |
364 | 0 | } |
365 | | |
366 | | const OCSP_CERTID *OCSP_SINGLERESP_get0_id(const OCSP_SINGLERESP *single) |
367 | 0 | { |
368 | 0 | return single->certId; |
369 | 0 | } |