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b1322259 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
9d6b1ce6 | 12 | #include <openssl/asn1t.h> |
ec577822 | 13 | #include <openssl/x509.h> |
e3e57192 | 14 | #include "internal/x509_int.h" |
edc54021 | 15 | #include <openssl/x509v3.h> |
1e898fb0 | 16 | #include "x509_lcl.h" |
d02b48c6 | 17 | |
0f113f3e MC |
18 | static int X509_REVOKED_cmp(const X509_REVOKED *const *a, |
19 | const X509_REVOKED *const *b); | |
4d50a2b4 | 20 | static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp); |
d02b48c6 | 21 | |
9d6b1ce6 | 22 | ASN1_SEQUENCE(X509_REVOKED) = { |
34a42e14 | 23 | ASN1_EMBED(X509_REVOKED,serialNumber, ASN1_INTEGER), |
0f113f3e MC |
24 | ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME), |
25 | ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION) | |
d339187b | 26 | } ASN1_SEQUENCE_END(X509_REVOKED) |
9d6b1ce6 | 27 | |
f4c630ab DSH |
28 | static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r); |
29 | static int def_crl_lookup(X509_CRL *crl, | |
0f113f3e MC |
30 | X509_REVOKED **ret, ASN1_INTEGER *serial, |
31 | X509_NAME *issuer); | |
f4c630ab | 32 | |
0f113f3e MC |
33 | static X509_CRL_METHOD int_crl_meth = { |
34 | 0, | |
35 | 0, 0, | |
36 | def_crl_lookup, | |
37 | def_crl_verify | |
38 | }; | |
f4c630ab DSH |
39 | |
40 | static const X509_CRL_METHOD *default_crl_method = &int_crl_meth; | |
41 | ||
0f113f3e MC |
42 | /* |
43 | * The X509_CRL_INFO structure needs a bit of customisation. Since we cache | |
60250017 | 44 | * the original encoding the signature won't be affected by reordering of the |
0f113f3e | 45 | * revoked field. |
9d6b1ce6 | 46 | */ |
24484759 | 47 | static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
0f113f3e | 48 | void *exarg) |
9d6b1ce6 | 49 | { |
0f113f3e MC |
50 | X509_CRL_INFO *a = (X509_CRL_INFO *)*pval; |
51 | ||
52 | if (!a || !a->revoked) | |
53 | return 1; | |
54 | switch (operation) { | |
55 | /* | |
56 | * Just set cmp function here. We don't sort because that would | |
57 | * affect the output of X509_CRL_print(). | |
58 | */ | |
59 | case ASN1_OP_D2I_POST: | |
60 | (void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp); | |
61 | break; | |
62 | } | |
63 | return 1; | |
9d6b1ce6 DSH |
64 | } |
65 | ||
66 | ||
2f605e8d | 67 | ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = { |
0f113f3e | 68 | ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER), |
6e63c142 | 69 | ASN1_EMBED(X509_CRL_INFO, sig_alg, X509_ALGOR), |
0f113f3e MC |
70 | ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME), |
71 | ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME), | |
72 | ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME), | |
73 | ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED), | |
74 | ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0) | |
2f605e8d | 75 | } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO) |
9d6b1ce6 | 76 | |
0f113f3e MC |
77 | /* |
78 | * Set CRL entry issuer according to CRL certificate issuer extension. Check | |
79 | * for unhandled critical CRL entry extensions. | |
d0fff69d DSH |
80 | */ |
81 | ||
82 | static int crl_set_issuers(X509_CRL *crl) | |
0f113f3e MC |
83 | { |
84 | ||
85 | int i, j; | |
86 | GENERAL_NAMES *gens, *gtmp; | |
87 | STACK_OF(X509_REVOKED) *revoked; | |
88 | ||
89 | revoked = X509_CRL_get_REVOKED(crl); | |
90 | ||
91 | gens = NULL; | |
92 | for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) { | |
93 | X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i); | |
94 | STACK_OF(X509_EXTENSION) *exts; | |
95 | ASN1_ENUMERATED *reason; | |
96 | X509_EXTENSION *ext; | |
97 | gtmp = X509_REVOKED_get_ext_d2i(rev, | |
98 | NID_certificate_issuer, &j, NULL); | |
99 | if (!gtmp && (j != -1)) { | |
100 | crl->flags |= EXFLAG_INVALID; | |
101 | return 1; | |
102 | } | |
103 | ||
104 | if (gtmp) { | |
105 | gens = gtmp; | |
106 | if (!crl->issuers) { | |
107 | crl->issuers = sk_GENERAL_NAMES_new_null(); | |
108 | if (!crl->issuers) | |
109 | return 0; | |
110 | } | |
111 | if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp)) | |
112 | return 0; | |
113 | } | |
114 | rev->issuer = gens; | |
115 | ||
116 | reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL); | |
117 | if (!reason && (j != -1)) { | |
118 | crl->flags |= EXFLAG_INVALID; | |
119 | return 1; | |
120 | } | |
121 | ||
122 | if (reason) { | |
123 | rev->reason = ASN1_ENUMERATED_get(reason); | |
124 | ASN1_ENUMERATED_free(reason); | |
125 | } else | |
126 | rev->reason = CRL_REASON_NONE; | |
127 | ||
128 | /* Check for critical CRL entry extensions */ | |
129 | ||
130 | exts = rev->extensions; | |
131 | ||
132 | for (j = 0; j < sk_X509_EXTENSION_num(exts); j++) { | |
133 | ext = sk_X509_EXTENSION_value(exts, j); | |
4903abd5 DSH |
134 | if (X509_EXTENSION_get_critical(ext)) { |
135 | if (OBJ_obj2nid(X509_EXTENSION_get_object(ext)) == NID_certificate_issuer) | |
0f113f3e MC |
136 | continue; |
137 | crl->flags |= EXFLAG_CRITICAL; | |
138 | break; | |
139 | } | |
140 | } | |
141 | ||
142 | } | |
143 | ||
144 | return 1; | |
145 | ||
146 | } | |
147 | ||
148 | /* | |
149 | * The X509_CRL structure needs a bit of customisation. Cache some extensions | |
edc54021 DSH |
150 | * and hash of the whole CRL. |
151 | */ | |
152 | static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, | |
0f113f3e MC |
153 | void *exarg) |
154 | { | |
155 | X509_CRL *crl = (X509_CRL *)*pval; | |
156 | STACK_OF(X509_EXTENSION) *exts; | |
157 | X509_EXTENSION *ext; | |
158 | int idx; | |
159 | ||
160 | switch (operation) { | |
161 | case ASN1_OP_NEW_POST: | |
162 | crl->idp = NULL; | |
163 | crl->akid = NULL; | |
164 | crl->flags = 0; | |
165 | crl->idp_flags = 0; | |
166 | crl->idp_reasons = CRLDP_ALL_REASONS; | |
167 | crl->meth = default_crl_method; | |
168 | crl->meth_data = NULL; | |
169 | crl->issuers = NULL; | |
170 | crl->crl_number = NULL; | |
171 | crl->base_crl_number = NULL; | |
172 | break; | |
173 | ||
174 | case ASN1_OP_D2I_POST: | |
0f113f3e | 175 | X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL); |
0f113f3e MC |
176 | crl->idp = X509_CRL_get_ext_d2i(crl, |
177 | NID_issuing_distribution_point, NULL, | |
178 | NULL); | |
179 | if (crl->idp) | |
180 | setup_idp(crl, crl->idp); | |
181 | ||
182 | crl->akid = X509_CRL_get_ext_d2i(crl, | |
183 | NID_authority_key_identifier, NULL, | |
184 | NULL); | |
185 | ||
186 | crl->crl_number = X509_CRL_get_ext_d2i(crl, | |
187 | NID_crl_number, NULL, NULL); | |
188 | ||
189 | crl->base_crl_number = X509_CRL_get_ext_d2i(crl, | |
190 | NID_delta_crl, NULL, | |
191 | NULL); | |
192 | /* Delta CRLs must have CRL number */ | |
193 | if (crl->base_crl_number && !crl->crl_number) | |
194 | crl->flags |= EXFLAG_INVALID; | |
195 | ||
196 | /* | |
197 | * See if we have any unhandled critical CRL extensions and indicate | |
198 | * this in a flag. We only currently handle IDP so anything else | |
199 | * critical sets the flag. This code accesses the X509_CRL structure | |
200 | * directly: applications shouldn't do this. | |
201 | */ | |
202 | ||
7aef39a7 | 203 | exts = crl->crl.extensions; |
0f113f3e MC |
204 | |
205 | for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) { | |
206 | int nid; | |
207 | ext = sk_X509_EXTENSION_value(exts, idx); | |
4903abd5 | 208 | nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext)); |
0f113f3e MC |
209 | if (nid == NID_freshest_crl) |
210 | crl->flags |= EXFLAG_FRESHEST; | |
4903abd5 | 211 | if (X509_EXTENSION_get_critical(ext)) { |
0f113f3e MC |
212 | /* We handle IDP and deltas */ |
213 | if ((nid == NID_issuing_distribution_point) | |
214 | || (nid == NID_authority_key_identifier) | |
215 | || (nid == NID_delta_crl)) | |
2b406990 | 216 | continue; |
0f113f3e MC |
217 | crl->flags |= EXFLAG_CRITICAL; |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | if (!crl_set_issuers(crl)) | |
223 | return 0; | |
224 | ||
225 | if (crl->meth->crl_init) { | |
226 | if (crl->meth->crl_init(crl) == 0) | |
227 | return 0; | |
228 | } | |
229 | break; | |
230 | ||
231 | case ASN1_OP_FREE_POST: | |
232 | if (crl->meth->crl_free) { | |
233 | if (!crl->meth->crl_free(crl)) | |
234 | return 0; | |
235 | } | |
25aaa98a RS |
236 | AUTHORITY_KEYID_free(crl->akid); |
237 | ISSUING_DIST_POINT_free(crl->idp); | |
0f113f3e MC |
238 | ASN1_INTEGER_free(crl->crl_number); |
239 | ASN1_INTEGER_free(crl->base_crl_number); | |
240 | sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free); | |
241 | break; | |
242 | } | |
243 | return 1; | |
244 | } | |
edc54021 | 245 | |
4d50a2b4 DSH |
246 | /* Convert IDP into a more convenient form */ |
247 | ||
248 | static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp) | |
0f113f3e MC |
249 | { |
250 | int idp_only = 0; | |
251 | /* Set various flags according to IDP */ | |
252 | crl->idp_flags |= IDP_PRESENT; | |
253 | if (idp->onlyuser > 0) { | |
254 | idp_only++; | |
255 | crl->idp_flags |= IDP_ONLYUSER; | |
256 | } | |
257 | if (idp->onlyCA > 0) { | |
258 | idp_only++; | |
259 | crl->idp_flags |= IDP_ONLYCA; | |
260 | } | |
261 | if (idp->onlyattr > 0) { | |
262 | idp_only++; | |
263 | crl->idp_flags |= IDP_ONLYATTR; | |
264 | } | |
265 | ||
266 | if (idp_only > 1) | |
267 | crl->idp_flags |= IDP_INVALID; | |
268 | ||
269 | if (idp->indirectCRL > 0) | |
270 | crl->idp_flags |= IDP_INDIRECT; | |
271 | ||
272 | if (idp->onlysomereasons) { | |
273 | crl->idp_flags |= IDP_REASONS; | |
274 | if (idp->onlysomereasons->length > 0) | |
275 | crl->idp_reasons = idp->onlysomereasons->data[0]; | |
276 | if (idp->onlysomereasons->length > 1) | |
277 | crl->idp_reasons |= (idp->onlysomereasons->data[1] << 8); | |
278 | crl->idp_reasons &= CRLDP_ALL_REASONS; | |
279 | } | |
280 | ||
281 | DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl)); | |
282 | } | |
4d50a2b4 | 283 | |
c001ce33 | 284 | ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = { |
7aef39a7 | 285 | ASN1_EMBED(X509_CRL, crl, X509_CRL_INFO), |
6e63c142 | 286 | ASN1_EMBED(X509_CRL, sig_alg, X509_ALGOR), |
34a42e14 | 287 | ASN1_EMBED(X509_CRL, signature, ASN1_BIT_STRING) |
d339187b | 288 | } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL) |
9d6b1ce6 DSH |
289 | |
290 | IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED) | |
0f113f3e | 291 | |
2e8cb108 | 292 | IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED) |
0f113f3e | 293 | |
9d6b1ce6 | 294 | IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO) |
739a5eee | 295 | |
9d6b1ce6 | 296 | IMPLEMENT_ASN1_FUNCTIONS(X509_CRL) |
739a5eee | 297 | |
1241126a | 298 | IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL) |
d02b48c6 | 299 | |
0f113f3e MC |
300 | static int X509_REVOKED_cmp(const X509_REVOKED *const *a, |
301 | const X509_REVOKED *const *b) | |
302 | { | |
34a42e14 DSH |
303 | return (ASN1_STRING_cmp((ASN1_STRING *)&(*a)->serialNumber, |
304 | (ASN1_STRING *)&(*b)->serialNumber)); | |
0f113f3e | 305 | } |
d02b48c6 | 306 | |
9d6b1ce6 DSH |
307 | int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev) |
308 | { | |
0f113f3e | 309 | X509_CRL_INFO *inf; |
7aef39a7 | 310 | inf = &crl->crl; |
90945fa3 | 311 | if (inf->revoked == NULL) |
0f113f3e | 312 | inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp); |
90945fa3 | 313 | if (inf->revoked == NULL || !sk_X509_REVOKED_push(inf->revoked, rev)) { |
0f113f3e MC |
314 | ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE); |
315 | return 0; | |
316 | } | |
317 | inf->enc.modified = 1; | |
318 | return 1; | |
9d6b1ce6 DSH |
319 | } |
320 | ||
010fa0b3 | 321 | int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r) |
0f113f3e MC |
322 | { |
323 | if (crl->meth->crl_verify) | |
324 | return crl->meth->crl_verify(crl, r); | |
325 | return 0; | |
326 | } | |
f4c630ab DSH |
327 | |
328 | int X509_CRL_get0_by_serial(X509_CRL *crl, | |
0f113f3e MC |
329 | X509_REVOKED **ret, ASN1_INTEGER *serial) |
330 | { | |
331 | if (crl->meth->crl_lookup) | |
332 | return crl->meth->crl_lookup(crl, ret, serial, NULL); | |
333 | return 0; | |
334 | } | |
d0fff69d DSH |
335 | |
336 | int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x) | |
0f113f3e MC |
337 | { |
338 | if (crl->meth->crl_lookup) | |
339 | return crl->meth->crl_lookup(crl, ret, | |
340 | X509_get_serialNumber(x), | |
341 | X509_get_issuer_name(x)); | |
342 | return 0; | |
343 | } | |
f4c630ab DSH |
344 | |
345 | static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r) | |
0f113f3e MC |
346 | { |
347 | return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO), | |
34a42e14 | 348 | &crl->sig_alg, &crl->signature, &crl->crl, r)); |
0f113f3e | 349 | } |
010fa0b3 | 350 | |
d0fff69d | 351 | static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm, |
0f113f3e MC |
352 | X509_REVOKED *rev) |
353 | { | |
354 | int i; | |
355 | ||
356 | if (!rev->issuer) { | |
357 | if (!nm) | |
358 | return 1; | |
359 | if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl))) | |
360 | return 1; | |
361 | return 0; | |
362 | } | |
363 | ||
364 | if (!nm) | |
365 | nm = X509_CRL_get_issuer(crl); | |
366 | ||
367 | for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) { | |
368 | GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i); | |
369 | if (gen->type != GEN_DIRNAME) | |
370 | continue; | |
371 | if (!X509_NAME_cmp(nm, gen->d.directoryName)) | |
372 | return 1; | |
373 | } | |
374 | return 0; | |
375 | ||
376 | } | |
d0fff69d | 377 | |
f4c630ab | 378 | static int def_crl_lookup(X509_CRL *crl, |
0f113f3e MC |
379 | X509_REVOKED **ret, ASN1_INTEGER *serial, |
380 | X509_NAME *issuer) | |
381 | { | |
382 | X509_REVOKED rtmp, *rev; | |
383 | int idx; | |
34a42e14 | 384 | rtmp.serialNumber = *serial; |
0f113f3e MC |
385 | /* |
386 | * Sort revoked into serial number order if not already sorted. Do this | |
387 | * under a lock to avoid race condition. | |
388 | */ | |
7aef39a7 | 389 | if (!sk_X509_REVOKED_is_sorted(crl->crl.revoked)) { |
c001ce33 | 390 | CRYPTO_THREAD_write_lock(crl->lock); |
7aef39a7 | 391 | sk_X509_REVOKED_sort(crl->crl.revoked); |
c001ce33 | 392 | CRYPTO_THREAD_unlock(crl->lock); |
0f113f3e | 393 | } |
7aef39a7 | 394 | idx = sk_X509_REVOKED_find(crl->crl.revoked, &rtmp); |
0f113f3e MC |
395 | if (idx < 0) |
396 | return 0; | |
397 | /* Need to look for matching name */ | |
7aef39a7 DSH |
398 | for (; idx < sk_X509_REVOKED_num(crl->crl.revoked); idx++) { |
399 | rev = sk_X509_REVOKED_value(crl->crl.revoked, idx); | |
34a42e14 | 400 | if (ASN1_INTEGER_cmp(&rev->serialNumber, serial)) |
0f113f3e MC |
401 | return 0; |
402 | if (crl_revoked_issuer_match(crl, issuer, rev)) { | |
403 | if (ret) | |
404 | *ret = rev; | |
405 | if (rev->reason == CRL_REASON_REMOVE_FROM_CRL) | |
406 | return 2; | |
407 | return 1; | |
408 | } | |
409 | } | |
410 | return 0; | |
411 | } | |
010fa0b3 | 412 | |
f4c630ab | 413 | void X509_CRL_set_default_method(const X509_CRL_METHOD *meth) |
0f113f3e MC |
414 | { |
415 | if (meth == NULL) | |
416 | default_crl_method = &int_crl_meth; | |
417 | else | |
418 | default_crl_method = meth; | |
419 | } | |
420 | ||
421 | X509_CRL_METHOD *X509_CRL_METHOD_new(int (*crl_init) (X509_CRL *crl), | |
422 | int (*crl_free) (X509_CRL *crl), | |
423 | int (*crl_lookup) (X509_CRL *crl, | |
424 | X509_REVOKED **ret, | |
425 | ASN1_INTEGER *ser, | |
426 | X509_NAME *issuer), | |
427 | int (*crl_verify) (X509_CRL *crl, | |
428 | EVP_PKEY *pk)) | |
429 | { | |
430 | X509_CRL_METHOD *m; | |
b4faea50 | 431 | m = OPENSSL_malloc(sizeof(*m)); |
90945fa3 | 432 | if (m == NULL) |
0f113f3e MC |
433 | return NULL; |
434 | m->crl_init = crl_init; | |
435 | m->crl_free = crl_free; | |
436 | m->crl_lookup = crl_lookup; | |
437 | m->crl_verify = crl_verify; | |
438 | m->flags = X509_CRL_METHOD_DYNAMIC; | |
439 | return m; | |
440 | } | |
f4c630ab DSH |
441 | |
442 | void X509_CRL_METHOD_free(X509_CRL_METHOD *m) | |
0f113f3e | 443 | { |
7cb1ecec | 444 | if (m == NULL || !(m->flags & X509_CRL_METHOD_DYNAMIC)) |
0f113f3e MC |
445 | return; |
446 | OPENSSL_free(m); | |
447 | } | |
f4c630ab DSH |
448 | |
449 | void X509_CRL_set_meth_data(X509_CRL *crl, void *dat) | |
0f113f3e MC |
450 | { |
451 | crl->meth_data = dat; | |
452 | } | |
f4c630ab DSH |
453 | |
454 | void *X509_CRL_get_meth_data(X509_CRL *crl) | |
0f113f3e MC |
455 | { |
456 | return crl->meth_data; | |
457 | } |