1/*
2 * Copyright 2000-2016 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 "internal/cryptlib.h"
12#include <openssl/objects.h>
13#include <openssl/x509.h>
14#include <openssl/ocsp.h>
15#include "ocsp_local.h"
16#include <openssl/rand.h>
17#include <openssl/x509v3.h>
18
19/* Standard wrapper functions for extensions */
20
21/* OCSP request extensions */
22
23int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x)
24{
25 return X509v3_get_ext_count(x->tbsRequest.requestExtensions);
26}
27
28int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos)
29{
30 return (X509v3_get_ext_by_NID
31 (x->tbsRequest.requestExtensions, nid, lastpos));
32}
33
34int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, const ASN1_OBJECT *obj,
35 int lastpos)
36{
37 return (X509v3_get_ext_by_OBJ
38 (x->tbsRequest.requestExtensions, obj, lastpos));
39}
40
41int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos)
42{
43 return (X509v3_get_ext_by_critical
44 (x->tbsRequest.requestExtensions, crit, lastpos));
45}
46
47X509_EXTENSION *OCSP_REQUEST_get_ext(OCSP_REQUEST *x, int loc)
48{
49 return X509v3_get_ext(x->tbsRequest.requestExtensions, loc);
50}
51
52X509_EXTENSION *OCSP_REQUEST_delete_ext(OCSP_REQUEST *x, int loc)
53{
54 return X509v3_delete_ext(x->tbsRequest.requestExtensions, loc);
55}
56
57void *OCSP_REQUEST_get1_ext_d2i(OCSP_REQUEST *x, int nid, int *crit, int *idx)
58{
59 return X509V3_get_d2i(x->tbsRequest.requestExtensions, nid, crit, idx);
60}
61
62int OCSP_REQUEST_add1_ext_i2d(OCSP_REQUEST *x, int nid, void *value, int crit,
63 unsigned long flags)
64{
65 return X509V3_add1_i2d(&x->tbsRequest.requestExtensions, nid, value,
66 crit, flags);
67}
68
69int OCSP_REQUEST_add_ext(OCSP_REQUEST *x, X509_EXTENSION *ex, int loc)
70{
71 return (X509v3_add_ext(&(x->tbsRequest.requestExtensions), ex, loc) !=
72 NULL);
73}
74
75/* Single extensions */
76
77int OCSP_ONEREQ_get_ext_count(OCSP_ONEREQ *x)
78{
79 return X509v3_get_ext_count(x->singleRequestExtensions);
80}
81
82int OCSP_ONEREQ_get_ext_by_NID(OCSP_ONEREQ *x, int nid, int lastpos)
83{
84 return X509v3_get_ext_by_NID(x->singleRequestExtensions, nid, lastpos);
85}
86
87int OCSP_ONEREQ_get_ext_by_OBJ(OCSP_ONEREQ *x, const ASN1_OBJECT *obj,
88 int lastpos)
89{
90 return X509v3_get_ext_by_OBJ(x->singleRequestExtensions, obj, lastpos);
91}
92
93int OCSP_ONEREQ_get_ext_by_critical(OCSP_ONEREQ *x, int crit, int lastpos)
94{
95 return (X509v3_get_ext_by_critical
96 (x->singleRequestExtensions, crit, lastpos));
97}
98
99X509_EXTENSION *OCSP_ONEREQ_get_ext(OCSP_ONEREQ *x, int loc)
100{
101 return X509v3_get_ext(x->singleRequestExtensions, loc);
102}
103
104X509_EXTENSION *OCSP_ONEREQ_delete_ext(OCSP_ONEREQ *x, int loc)
105{
106 return X509v3_delete_ext(x->singleRequestExtensions, loc);
107}
108
109void *OCSP_ONEREQ_get1_ext_d2i(OCSP_ONEREQ *x, int nid, int *crit, int *idx)
110{
111 return X509V3_get_d2i(x->singleRequestExtensions, nid, crit, idx);
112}
113
114int OCSP_ONEREQ_add1_ext_i2d(OCSP_ONEREQ *x, int nid, void *value, int crit,
115 unsigned long flags)
116{
117 return X509V3_add1_i2d(&x->singleRequestExtensions, nid, value, crit,
118 flags);
119}
120
121int OCSP_ONEREQ_add_ext(OCSP_ONEREQ *x, X509_EXTENSION *ex, int loc)
122{
123 return (X509v3_add_ext(&(x->singleRequestExtensions), ex, loc) != NULL);
124}
125
126/* OCSP Basic response */
127
128int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *x)
129{
130 return X509v3_get_ext_count(x->tbsResponseData.responseExtensions);
131}
132
133int OCSP_BASICRESP_get_ext_by_NID(OCSP_BASICRESP *x, int nid, int lastpos)
134{
135 return (X509v3_get_ext_by_NID
136 (x->tbsResponseData.responseExtensions, nid, lastpos));
137}
138
139int OCSP_BASICRESP_get_ext_by_OBJ(OCSP_BASICRESP *x, const ASN1_OBJECT *obj,
140 int lastpos)
141{
142 return (X509v3_get_ext_by_OBJ
143 (x->tbsResponseData.responseExtensions, obj, lastpos));
144}
145
146int OCSP_BASICRESP_get_ext_by_critical(OCSP_BASICRESP *x, int crit,
147 int lastpos)
148{
149 return (X509v3_get_ext_by_critical
150 (x->tbsResponseData.responseExtensions, crit, lastpos));
151}
152
153X509_EXTENSION *OCSP_BASICRESP_get_ext(OCSP_BASICRESP *x, int loc)
154{
155 return X509v3_get_ext(x->tbsResponseData.responseExtensions, loc);
156}
157
158X509_EXTENSION *OCSP_BASICRESP_delete_ext(OCSP_BASICRESP *x, int loc)
159{
160 return X509v3_delete_ext(x->tbsResponseData.responseExtensions, loc);
161}
162
163void *OCSP_BASICRESP_get1_ext_d2i(OCSP_BASICRESP *x, int nid, int *crit,
164 int *idx)
165{
166 return X509V3_get_d2i(x->tbsResponseData.responseExtensions, nid, crit,
167 idx);
168}
169
170int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *x, int nid, void *value,
171 int crit, unsigned long flags)
172{
173 return X509V3_add1_i2d(&x->tbsResponseData.responseExtensions, nid,
174 value, crit, flags);
175}
176
177int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *x, X509_EXTENSION *ex, int loc)
178{
179 return (X509v3_add_ext(&(x->tbsResponseData.responseExtensions), ex, loc)
180 != NULL);
181}
182
183/* OCSP single response extensions */
184
185int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *x)
186{
187 return X509v3_get_ext_count(x->singleExtensions);
188}
189
190int OCSP_SINGLERESP_get_ext_by_NID(OCSP_SINGLERESP *x, int nid, int lastpos)
191{
192 return X509v3_get_ext_by_NID(x->singleExtensions, nid, lastpos);
193}
194
195int OCSP_SINGLERESP_get_ext_by_OBJ(OCSP_SINGLERESP *x, const ASN1_OBJECT *obj,
196 int lastpos)
197{
198 return X509v3_get_ext_by_OBJ(x->singleExtensions, obj, lastpos);
199}
200
201int OCSP_SINGLERESP_get_ext_by_critical(OCSP_SINGLERESP *x, int crit,
202 int lastpos)
203{
204 return X509v3_get_ext_by_critical(x->singleExtensions, crit, lastpos);
205}
206
207X509_EXTENSION *OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *x, int loc)
208{
209 return X509v3_get_ext(x->singleExtensions, loc);
210}
211
212X509_EXTENSION *OCSP_SINGLERESP_delete_ext(OCSP_SINGLERESP *x, int loc)
213{
214 return X509v3_delete_ext(x->singleExtensions, loc);
215}
216
217void *OCSP_SINGLERESP_get1_ext_d2i(OCSP_SINGLERESP *x, int nid, int *crit,
218 int *idx)
219{
220 return X509V3_get_d2i(x->singleExtensions, nid, crit, idx);
221}
222
223int OCSP_SINGLERESP_add1_ext_i2d(OCSP_SINGLERESP *x, int nid, void *value,
224 int crit, unsigned long flags)
225{
226 return X509V3_add1_i2d(&x->singleExtensions, nid, value, crit, flags);
227}
228
229int OCSP_SINGLERESP_add_ext(OCSP_SINGLERESP *x, X509_EXTENSION *ex, int loc)
230{
231 return (X509v3_add_ext(&(x->singleExtensions), ex, loc) != NULL);
232}
233
234/* also CRL Entry Extensions */
235
236/* Nonce handling functions */
237
238/*
239 * Add a nonce to an extension stack. A nonce can be specified or if NULL a
240 * random nonce will be generated. Note: OpenSSL 0.9.7d and later create an
241 * OCTET STRING containing the nonce, previous versions used the raw nonce.
242 */
243
244static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts,
245 unsigned char *val, int len)
246{
247 unsigned char *tmpval;
248 ASN1_OCTET_STRING os;
249 int ret = 0;
250 if (len <= 0)
251 len = OCSP_DEFAULT_NONCE_LENGTH;
252 /*
253 * Create the OCTET STRING manually by writing out the header and
254 * appending the content octets. This avoids an extra memory allocation
255 * operation in some cases. Applications should *NOT* do this because it
256 * relies on library internals.
257 */
258 os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING);
259 if (os.length < 0)
260 return 0;
261
262 os.data = OPENSSL_malloc(os.length);
263 if (os.data == NULL)
264 goto err;
265 tmpval = os.data;
266 ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL);
267 if (val)
268 memcpy(tmpval, val, len);
269 else if (RAND_bytes(tmpval, len) <= 0)
270 goto err;
271 if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce,
272 &os, 0, X509V3_ADD_REPLACE))
273 goto err;
274 ret = 1;
275 err:
276 OPENSSL_free(os.data);
277 return ret;
278}
279
280/* Add nonce to an OCSP request */
281
282int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len)
283{
284 return ocsp_add1_nonce(&req->tbsRequest.requestExtensions, val, len);
285}
286
287/* Same as above but for a response */
288
289int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len)
290{
291 return ocsp_add1_nonce(&resp->tbsResponseData.responseExtensions, val,
292 len);
293}
294
295/*-
296 * Check nonce validity in a request and response.
297 * Return value reflects result:
298 * 1: nonces present and equal.
299 * 2: nonces both absent.
300 * 3: nonce present in response only.
301 * 0: nonces both present and not equal.
302 * -1: nonce in request only.
303 *
304 * For most responders clients can check return > 0.
305 * If responder doesn't handle nonces return != 0 may be
306 * necessary. return == 0 is always an error.
307 */
308
309int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs)
310{
311 /*
312 * Since we are only interested in the presence or absence of
313 * the nonce and comparing its value there is no need to use
314 * the X509V3 routines: this way we can avoid them allocating an
315 * ASN1_OCTET_STRING structure for the value which would be
316 * freed immediately anyway.
317 */
318
319 int req_idx, resp_idx;
320 X509_EXTENSION *req_ext, *resp_ext;
321 req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
322 resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1);
323 /* Check both absent */
324 if ((req_idx < 0) && (resp_idx < 0))
325 return 2;
326 /* Check in request only */
327 if ((req_idx >= 0) && (resp_idx < 0))
328 return -1;
329 /* Check in response but not request */
330 if ((req_idx < 0) && (resp_idx >= 0))
331 return 3;
332 /*
333 * Otherwise nonce in request and response so retrieve the extensions
334 */
335 req_ext = OCSP_REQUEST_get_ext(req, req_idx);
336 resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx);
337 if (ASN1_OCTET_STRING_cmp(X509_EXTENSION_get_data(req_ext),
338 X509_EXTENSION_get_data(resp_ext)))
339 return 0;
340 return 1;
341}
342
343/*
344 * Copy the nonce value (if any) from an OCSP request to a response.
345 */
346
347int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req)
348{
349 X509_EXTENSION *req_ext;
350 int req_idx;
351 /* Check for nonce in request */
352 req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
353 /* If no nonce that's OK */
354 if (req_idx < 0)
355 return 2;
356 req_ext = OCSP_REQUEST_get_ext(req, req_idx);
357 return OCSP_BASICRESP_add_ext(resp, req_ext, -1);
358}
359
360X509_EXTENSION *OCSP_crlID_new(const char *url, long *n, char *tim)
361{
362 X509_EXTENSION *x = NULL;
363 OCSP_CRLID *cid = NULL;
364
365 if ((cid = OCSP_CRLID_new()) == NULL)
366 goto err;
367 if (url) {
368 if ((cid->crlUrl = ASN1_IA5STRING_new()) == NULL)
369 goto err;
370 if (!(ASN1_STRING_set(cid->crlUrl, url, -1)))
371 goto err;
372 }
373 if (n) {
374 if ((cid->crlNum = ASN1_INTEGER_new()) == NULL)
375 goto err;
376 if (!(ASN1_INTEGER_set(cid->crlNum, *n)))
377 goto err;
378 }
379 if (tim) {
380 if ((cid->crlTime = ASN1_GENERALIZEDTIME_new()) == NULL)
381 goto err;
382 if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim)))
383 goto err;
384 }
385 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid);
386 err:
387 OCSP_CRLID_free(cid);
388 return x;
389}
390
391/* AcceptableResponses ::= SEQUENCE OF OBJECT IDENTIFIER */
392X509_EXTENSION *OCSP_accept_responses_new(char **oids)
393{
394 int nid;
395 STACK_OF(ASN1_OBJECT) *sk = NULL;
396 ASN1_OBJECT *o = NULL;
397 X509_EXTENSION *x = NULL;
398
399 if ((sk = sk_ASN1_OBJECT_new_null()) == NULL)
400 goto err;
401 while (oids && *oids) {
402 if ((nid = OBJ_txt2nid(*oids)) != NID_undef && (o = OBJ_nid2obj(nid)))
403 sk_ASN1_OBJECT_push(sk, o);
404 oids++;
405 }
406 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk);
407 err:
408 sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
409 return x;
410}
411
412/* ArchiveCutoff ::= GeneralizedTime */
413X509_EXTENSION *OCSP_archive_cutoff_new(char *tim)
414{
415 X509_EXTENSION *x = NULL;
416 ASN1_GENERALIZEDTIME *gt = NULL;
417
418 if ((gt = ASN1_GENERALIZEDTIME_new()) == NULL)
419 goto err;
420 if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim)))
421 goto err;
422 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt);
423 err:
424 ASN1_GENERALIZEDTIME_free(gt);
425 return x;
426}
427
428/*
429 * per ACCESS_DESCRIPTION parameter are oids, of which there are currently
430 * two--NID_ad_ocsp, NID_id_ad_caIssuers--and GeneralName value. This method
431 * forces NID_ad_ocsp and uniformResourceLocator [6] IA5String.
432 */
433X509_EXTENSION *OCSP_url_svcloc_new(X509_NAME *issuer, const char **urls)
434{
435 X509_EXTENSION *x = NULL;
436 ASN1_IA5STRING *ia5 = NULL;
437 OCSP_SERVICELOC *sloc = NULL;
438 ACCESS_DESCRIPTION *ad = NULL;
439
440 if ((sloc = OCSP_SERVICELOC_new()) == NULL)
441 goto err;
442 X509_NAME_free(sloc->issuer);
443 if ((sloc->issuer = X509_NAME_dup(issuer)) == NULL)
444 goto err;
445 if (urls && *urls
446 && (sloc->locator = sk_ACCESS_DESCRIPTION_new_null()) == NULL)
447 goto err;
448 while (urls && *urls) {
449 if ((ad = ACCESS_DESCRIPTION_new()) == NULL)
450 goto err;
451 if ((ad->method = OBJ_nid2obj(NID_ad_OCSP)) == NULL)
452 goto err;
453 if ((ia5 = ASN1_IA5STRING_new()) == NULL)
454 goto err;
455 if (!ASN1_STRING_set((ASN1_STRING *)ia5, *urls, -1))
456 goto err;
457 /* ad->location is allocated inside ACCESS_DESCRIPTION_new */
458 ad->location->type = GEN_URI;
459 ad->location->d.ia5 = ia5;
460 ia5 = NULL;
461 if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad))
462 goto err;
463 ad = NULL;
464 urls++;
465 }
466 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc);
467 err:
468 ASN1_IA5STRING_free(ia5);
469 ACCESS_DESCRIPTION_free(ad);
470 OCSP_SERVICELOC_free(sloc);
471 return x;
472}
473