1 /* ocsp_ext.c */
2 /* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
3 * project. */
4
5 /* History:
6 This file was transfered to Richard Levitte from CertCo by Kathy
7 Weinhold in mid-spring 2000 to be included in OpenSSL or released
8 as a patch kit. */
9
10 /* ====================================================================
11 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. All advertising materials mentioning features or use of this
26 * software must display the following acknowledgment:
27 * "This product includes software developed by the OpenSSL Project
28 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
29 *
30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
31 * endorse or promote products derived from this software without
32 * prior written permission. For written permission, please contact
33 * openssl-core@openssl.org.
34 *
35 * 5. Products derived from this software may not be called "OpenSSL"
36 * nor may "OpenSSL" appear in their names without prior written
37 * permission of the OpenSSL Project.
38 *
39 * 6. Redistributions of any form whatsoever must retain the following
40 * acknowledgment:
41 * "This product includes software developed by the OpenSSL Project
42 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
47 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
55 * OF THE POSSIBILITY OF SUCH DAMAGE.
56 * ====================================================================
57 *
58 * This product includes cryptographic software written by Eric Young
59 * (eay@cryptsoft.com). This product includes software written by Tim
60 * Hudson (tjh@cryptsoft.com).
61 *
62 */
63
64 #include <stdio.h>
65 #include <cryptlib.h>
66 #include <openssl/objects.h>
67 #include <openssl/x509.h>
68 #include <openssl/ocsp.h>
69 #include <openssl/rand.h>
70 #include <openssl/x509v3.h>
71
72 /* Standard wrapper functions for extensions */
73
74 /* OCSP request extensions */
75
76 int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x)
77 {
78 return(X509v3_get_ext_count(x->tbsRequest->requestExtensions));
79 }
80
81 int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos)
82 {
83 return(X509v3_get_ext_by_NID(x->tbsRequest->requestExtensions,nid,lastpos));
84 }
85
86 int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, ASN1_OBJECT *obj, int lastpos)
87 {
88 return(X509v3_get_ext_by_OBJ(x->tbsRequest->requestExtensions,obj,lastpos));
89 }
90
91 int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos)
92 {
93 return(X509v3_get_ext_by_critical(x->tbsRequest->requestExtensions,crit,lastpos));
94 }
95
96 X509_EXTENSION *OCSP_REQUEST_get_ext(OCSP_REQUEST *x, int loc)
97 {
98 return(X509v3_get_ext(x->tbsRequest->requestExtensions,loc));
99 }
100
101 X509_EXTENSION *OCSP_REQUEST_delete_ext(OCSP_REQUEST *x, int loc)
102 {
103 return(X509v3_delete_ext(x->tbsRequest->requestExtensions,loc));
104 }
105
106 void *OCSP_REQUEST_get1_ext_d2i(OCSP_REQUEST *x, int nid, int *crit, int *idx)
107 {
108 return X509V3_get_d2i(x->tbsRequest->requestExtensions, nid, crit, idx);
109 }
110
111 int OCSP_REQUEST_add1_ext_i2d(OCSP_REQUEST *x, int nid, void *value, int crit,
112 unsigned long flags)
113 {
114 return X509V3_add1_i2d(&x->tbsRequest->requestExtensions, nid, value, crit, flags);
115 }
116
117 int OCSP_REQUEST_add_ext(OCSP_REQUEST *x, X509_EXTENSION *ex, int loc)
118 {
119 return(X509v3_add_ext(&(x->tbsRequest->requestExtensions),ex,loc) != NULL);
120 }
121
122 /* Single extensions */
123
124 int OCSP_ONEREQ_get_ext_count(OCSP_ONEREQ *x)
125 {
126 return(X509v3_get_ext_count(x->singleRequestExtensions));
127 }
128
129 int OCSP_ONEREQ_get_ext_by_NID(OCSP_ONEREQ *x, int nid, int lastpos)
130 {
131 return(X509v3_get_ext_by_NID(x->singleRequestExtensions,nid,lastpos));
132 }
133
134 int OCSP_ONEREQ_get_ext_by_OBJ(OCSP_ONEREQ *x, ASN1_OBJECT *obj, int lastpos)
135 {
136 return(X509v3_get_ext_by_OBJ(x->singleRequestExtensions,obj,lastpos));
137 }
138
139 int OCSP_ONEREQ_get_ext_by_critical(OCSP_ONEREQ *x, int crit, int lastpos)
140 {
141 return(X509v3_get_ext_by_critical(x->singleRequestExtensions,crit,lastpos));
142 }
143
144 X509_EXTENSION *OCSP_ONEREQ_get_ext(OCSP_ONEREQ *x, int loc)
145 {
146 return(X509v3_get_ext(x->singleRequestExtensions,loc));
147 }
148
149 X509_EXTENSION *OCSP_ONEREQ_delete_ext(OCSP_ONEREQ *x, int loc)
150 {
151 return(X509v3_delete_ext(x->singleRequestExtensions,loc));
152 }
153
154 void *OCSP_ONEREQ_get1_ext_d2i(OCSP_ONEREQ *x, int nid, int *crit, int *idx)
155 {
156 return X509V3_get_d2i(x->singleRequestExtensions, nid, crit, idx);
157 }
158
159 int OCSP_ONEREQ_add1_ext_i2d(OCSP_ONEREQ *x, int nid, void *value, int crit,
160 unsigned long flags)
161 {
162 return X509V3_add1_i2d(&x->singleRequestExtensions, nid, value, crit, flags);
163 }
164
165 int OCSP_ONEREQ_add_ext(OCSP_ONEREQ *x, X509_EXTENSION *ex, int loc)
166 {
167 return(X509v3_add_ext(&(x->singleRequestExtensions),ex,loc) != NULL);
168 }
169
170 /* OCSP Basic response */
171
172 int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *x)
173 {
174 return(X509v3_get_ext_count(x->tbsResponseData->responseExtensions));
175 }
176
177 int OCSP_BASICRESP_get_ext_by_NID(OCSP_BASICRESP *x, int nid, int lastpos)
178 {
179 return(X509v3_get_ext_by_NID(x->tbsResponseData->responseExtensions,nid,lastpos));
180 }
181
182 int OCSP_BASICRESP_get_ext_by_OBJ(OCSP_BASICRESP *x, ASN1_OBJECT *obj, int lastpos)
183 {
184 return(X509v3_get_ext_by_OBJ(x->tbsResponseData->responseExtensions,obj,lastpos));
185 }
186
187 int OCSP_BASICRESP_get_ext_by_critical(OCSP_BASICRESP *x, int crit, int lastpos)
188 {
189 return(X509v3_get_ext_by_critical(x->tbsResponseData->responseExtensions,crit,lastpos));
190 }
191
192 X509_EXTENSION *OCSP_BASICRESP_get_ext(OCSP_BASICRESP *x, int loc)
193 {
194 return(X509v3_get_ext(x->tbsResponseData->responseExtensions,loc));
195 }
196
197 X509_EXTENSION *OCSP_BASICRESP_delete_ext(OCSP_BASICRESP *x, int loc)
198 {
199 return(X509v3_delete_ext(x->tbsResponseData->responseExtensions,loc));
200 }
201
202 void *OCSP_BASICRESP_get1_ext_d2i(OCSP_BASICRESP *x, int nid, int *crit, int *idx)
203 {
204 return X509V3_get_d2i(x->tbsResponseData->responseExtensions, nid, crit, idx);
205 }
206
207 int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *x, int nid, void *value, int crit,
208 unsigned long flags)
209 {
210 return X509V3_add1_i2d(&x->tbsResponseData->responseExtensions, nid, value, crit, flags);
211 }
212
213 int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *x, X509_EXTENSION *ex, int loc)
214 {
215 return(X509v3_add_ext(&(x->tbsResponseData->responseExtensions),ex,loc) != NULL);
216 }
217
218 /* OCSP single response extensions */
219
220 int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *x)
221 {
222 return(X509v3_get_ext_count(x->singleExtensions));
223 }
224
225 int OCSP_SINGLERESP_get_ext_by_NID(OCSP_SINGLERESP *x, int nid, int lastpos)
226 {
227 return(X509v3_get_ext_by_NID(x->singleExtensions,nid,lastpos));
228 }
229
230 int OCSP_SINGLERESP_get_ext_by_OBJ(OCSP_SINGLERESP *x, ASN1_OBJECT *obj, int lastpos)
231 {
232 return(X509v3_get_ext_by_OBJ(x->singleExtensions,obj,lastpos));
233 }
234
235 int OCSP_SINGLERESP_get_ext_by_critical(OCSP_SINGLERESP *x, int crit, int lastpos)
236 {
237 return(X509v3_get_ext_by_critical(x->singleExtensions,crit,lastpos));
238 }
239
240 X509_EXTENSION *OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *x, int loc)
241 {
242 return(X509v3_get_ext(x->singleExtensions,loc));
243 }
244
245 X509_EXTENSION *OCSP_SINGLERESP_delete_ext(OCSP_SINGLERESP *x, int loc)
246 {
247 return(X509v3_delete_ext(x->singleExtensions,loc));
248 }
249
250 void *OCSP_SINGLERESP_get1_ext_d2i(OCSP_SINGLERESP *x, int nid, int *crit, int *idx)
251 {
252 return X509V3_get_d2i(x->singleExtensions, nid, crit, idx);
253 }
254
255 int OCSP_SINGLERESP_add1_ext_i2d(OCSP_SINGLERESP *x, int nid, void *value, int crit,
256 unsigned long flags)
257 {
258 return X509V3_add1_i2d(&x->singleExtensions, nid, value, crit, flags);
259 }
260
261 int OCSP_SINGLERESP_add_ext(OCSP_SINGLERESP *x, X509_EXTENSION *ex, int loc)
262 {
263 return(X509v3_add_ext(&(x->singleExtensions),ex,loc) != NULL);
264 }
265
266 /* also CRL Entry Extensions */
267 #if 0
268 ASN1_STRING *ASN1_STRING_encode(ASN1_STRING *s, i2d_of_void *i2d,
269 void *data, STACK_OF(ASN1_OBJECT) *sk)
270 {
271 int i;
272 unsigned char *p, *b = NULL;
273
274 if (data)
275 {
276 if ((i=i2d(data,NULL)) <= 0) goto err;
277 if (!(b=p=OPENSSL_malloc((unsigned int)i)))
278 goto err;
279 if (i2d(data, &p) <= 0) goto err;
280 }
281 else if (sk)
282 {
283 if ((i=i2d_ASN1_SET_OF_ASN1_OBJECT(sk,NULL,
284 (I2D_OF(ASN1_OBJECT))i2d,
285 V_ASN1_SEQUENCE,
286 V_ASN1_UNIVERSAL,
287 IS_SEQUENCE))<=0) goto err;
288 if (!(b=p=OPENSSL_malloc((unsigned int)i)))
289 goto err;
290 if (i2d_ASN1_SET_OF_ASN1_OBJECT(sk,&p,(I2D_OF(ASN1_OBJECT))i2d,
291 V_ASN1_SEQUENCE,
292 V_ASN1_UNIVERSAL,
293 IS_SEQUENCE)<=0) goto err;
294 }
295 else
296 {
297 OCSPerr(OCSP_F_ASN1_STRING_ENCODE,OCSP_R_BAD_DATA);
298 goto err;
299 }
300 if (!s && !(s = ASN1_STRING_new())) goto err;
301 if (!(ASN1_STRING_set(s, b, i))) goto err;
302 OPENSSL_free(b);
303 return s;
304 err:
305 if (b) OPENSSL_free(b);
306 return NULL;
307 }
308 #endif
309
310 /* Nonce handling functions */
311
312 /* Add a nonce to an extension stack. A nonce can be specificed or if NULL
313 * a random nonce will be generated.
314 * Note: OpenSSL 0.9.7d and later create an OCTET STRING containing the
315 * nonce, previous versions used the raw nonce.
316 */
317
318 static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts, unsigned char *val, int len)
319 {
320 unsigned char *tmpval;
321 ASN1_OCTET_STRING os;
322 int ret = 0;
323 if (len <= 0) len = OCSP_DEFAULT_NONCE_LENGTH;
324 /* Create the OCTET STRING manually by writing out the header and
325 * appending the content octets. This avoids an extra memory allocation
326 * operation in some cases. Applications should *NOT* do this because
327 * it relies on library internals.
328 */
329 os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING);
330 os.data = OPENSSL_malloc(os.length);
331 if (os.data == NULL)
332 goto err;
333 tmpval = os.data;
334 ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL);
335 if (val)
336 memcpy(tmpval, val, len);
337 else
338 RAND_pseudo_bytes(tmpval, len);
339 if(!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce,
340 &os, 0, X509V3_ADD_REPLACE))
341 goto err;
342 ret = 1;
343 err:
344 if (os.data)
345 OPENSSL_free(os.data);
346 return ret;
347 }
348
349
350 /* Add nonce to an OCSP request */
351
352 int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len)
353 {
354 return ocsp_add1_nonce(&req->tbsRequest->requestExtensions, val, len);
355 }
356
357 /* Same as above but for a response */
358
359 int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len)
360 {
361 return ocsp_add1_nonce(&resp->tbsResponseData->responseExtensions, val, len);
362 }
363
364 /* Check nonce validity in a request and response.
365 * Return value reflects result:
366 * 1: nonces present and equal.
367 * 2: nonces both absent.
368 * 3: nonce present in response only.
369 * 0: nonces both present and not equal.
370 * -1: nonce in request only.
371 *
372 * For most responders clients can check return > 0.
373 * If responder doesn't handle nonces return != 0 may be
374 * necessary. return == 0 is always an error.
375 */
376
377 int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs)
378 {
379 /*
380 * Since we are only interested in the presence or absence of
381 * the nonce and comparing its value there is no need to use
382 * the X509V3 routines: this way we can avoid them allocating an
383 * ASN1_OCTET_STRING structure for the value which would be
384 * freed immediately anyway.
385 */
386
387 int req_idx, resp_idx;
388 X509_EXTENSION *req_ext, *resp_ext;
389 req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
390 resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1);
391 /* Check both absent */
392 if((req_idx < 0) && (resp_idx < 0))
393 return 2;
394 /* Check in request only */
395 if((req_idx >= 0) && (resp_idx < 0))
396 return -1;
397 /* Check in response but not request */
398 if((req_idx < 0) && (resp_idx >= 0))
399 return 3;
400 /* Otherwise nonce in request and response so retrieve the extensions */
401 req_ext = OCSP_REQUEST_get_ext(req, req_idx);
402 resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx);
403 if(ASN1_OCTET_STRING_cmp(req_ext->value, resp_ext->value))
404 return 0;
405 return 1;
406 }
407
408 /* Copy the nonce value (if any) from an OCSP request to
409 * a response.
410 */
411
412 int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req)
413 {
414 X509_EXTENSION *req_ext;
415 int req_idx;
416 /* Check for nonce in request */
417 req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
418 /* If no nonce that's OK */
419 if (req_idx < 0) return 2;
420 req_ext = OCSP_REQUEST_get_ext(req, req_idx);
421 return OCSP_BASICRESP_add_ext(resp, req_ext, -1);
422 }
423
424 X509_EXTENSION *OCSP_crlID_new(char *url, long *n, char *tim)
425 {
426 X509_EXTENSION *x = NULL;
427 OCSP_CRLID *cid = NULL;
428
429 if (!(cid = OCSP_CRLID_new())) goto err;
430 if (url)
431 {
432 if (!(cid->crlUrl = ASN1_IA5STRING_new())) goto err;
433 if (!(ASN1_STRING_set(cid->crlUrl, url, -1))) goto err;
434 }
435 if (n)
436 {
437 if (!(cid->crlNum = ASN1_INTEGER_new())) goto err;
438 if (!(ASN1_INTEGER_set(cid->crlNum, *n))) goto err;
439 }
440 if (tim)
441 {
442 if (!(cid->crlTime = ASN1_GENERALIZEDTIME_new())) goto err;
443 if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim)))
444 goto err;
445 }
446 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid);
447 err:
448 if (cid) OCSP_CRLID_free(cid);
449 return x;
450 }
451
452 /* AcceptableResponses ::= SEQUENCE OF OBJECT IDENTIFIER */
453 X509_EXTENSION *OCSP_accept_responses_new(char **oids)
454 {
455 int nid;
456 STACK_OF(ASN1_OBJECT) *sk = NULL;
457 ASN1_OBJECT *o = NULL;
458 X509_EXTENSION *x = NULL;
459
460 if (!(sk = sk_ASN1_OBJECT_new_null())) goto err;
461 while (oids && *oids)
462 {
463 if ((nid=OBJ_txt2nid(*oids))!=NID_undef&&(o=OBJ_nid2obj(nid)))
464 sk_ASN1_OBJECT_push(sk, o);
465 oids++;
466 }
467 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk);
468 err:
469 if (sk) sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
470 return x;
471 }
472
473 /* ArchiveCutoff ::= GeneralizedTime */
474 X509_EXTENSION *OCSP_archive_cutoff_new(char* tim)
475 {
476 X509_EXTENSION *x=NULL;
477 ASN1_GENERALIZEDTIME *gt = NULL;
478
479 if (!(gt = ASN1_GENERALIZEDTIME_new())) goto err;
480 if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim))) goto err;
481 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt);
482 err:
483 if (gt) ASN1_GENERALIZEDTIME_free(gt);
484 return x;
485 }
486
487 /* per ACCESS_DESCRIPTION parameter are oids, of which there are currently
488 * two--NID_ad_ocsp, NID_id_ad_caIssuers--and GeneralName value. This
489 * method forces NID_ad_ocsp and uniformResourceLocator [6] IA5String.
490 */
491 X509_EXTENSION *OCSP_url_svcloc_new(X509_NAME* issuer, char **urls)
492 {
493 X509_EXTENSION *x = NULL;
494 ASN1_IA5STRING *ia5 = NULL;
495 OCSP_SERVICELOC *sloc = NULL;
496 ACCESS_DESCRIPTION *ad = NULL;
497
498 if (!(sloc = OCSP_SERVICELOC_new())) goto err;
499 if (!(sloc->issuer = X509_NAME_dup(issuer))) goto err;
500 if (urls && *urls && !(sloc->locator = sk_ACCESS_DESCRIPTION_new_null())) goto err;
501 while (urls && *urls)
502 {
503 if (!(ad = ACCESS_DESCRIPTION_new())) goto err;
504 if (!(ad->method=OBJ_nid2obj(NID_ad_OCSP))) goto err;
505 if (!(ad->location = GENERAL_NAME_new())) goto err;
506 if (!(ia5 = ASN1_IA5STRING_new())) goto err;
507 if (!ASN1_STRING_set((ASN1_STRING*)ia5, *urls, -1)) goto err;
508 ad->location->type = GEN_URI;
509 ad->location->d.ia5 = ia5;
510 if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad)) goto err;
511 urls++;
512 }
513 x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc);
514 err:
515 if (sloc) OCSP_SERVICELOC_free(sloc);
516 return x;
517 }