1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
57 #include <openssl/asn1.h>
58 #include <openssl/asn1t.h>
59 #include <openssl/digest.h>
60 #include <openssl/err.h>
61 #include <openssl/mem.h>
62 #include <openssl/obj.h>
63 #include <openssl/stack.h>
64 #include <openssl/thread.h>
65 #include <openssl/x509.h>
66 #include <openssl/x509v3.h>
68 #include "../internal.h"
71 * Method to handle CRL access. In general a CRL could be very large (several
72 * Mb) and can consume large amounts of resources if stored in memory by
73 * multiple processes. This method allows general CRL operations to be
74 * redirected to more efficient callbacks: for example a CRL entry database.
77 #define X509_CRL_METHOD_DYNAMIC 1
79 struct x509_crl_method_st {
81 int (*crl_init) (X509_CRL *crl);
82 int (*crl_free) (X509_CRL *crl);
83 int (*crl_lookup) (X509_CRL *crl, X509_REVOKED **ret,
84 ASN1_INTEGER *ser, X509_NAME *issuer);
85 int (*crl_verify) (X509_CRL *crl, EVP_PKEY *pk);
88 static int X509_REVOKED_cmp(const X509_REVOKED **a, const X509_REVOKED **b);
89 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);
91 ASN1_SEQUENCE(X509_REVOKED) = {
92 ASN1_SIMPLE(X509_REVOKED,serialNumber, ASN1_INTEGER),
93 ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
94 ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
95 } ASN1_SEQUENCE_END(X509_REVOKED)
97 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
98 static int def_crl_lookup(X509_CRL *crl,
99 X509_REVOKED **ret, ASN1_INTEGER *serial,
102 static const X509_CRL_METHOD int_crl_meth = {
109 static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
112 * The X509_CRL_INFO structure needs a bit of customisation. Since we cache
113 * the original encoding the signature wont be affected by reordering of the
116 static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
119 X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
121 if (!a || !a->revoked)
125 * Just set cmp function here. We don't sort because that would
126 * affect the output of X509_CRL_print().
128 case ASN1_OP_D2I_POST:
129 (void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp);
136 ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
137 ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
138 ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR),
139 ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
140 ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
141 ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
142 ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
143 ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
144 } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
147 * Set CRL entry issuer according to CRL certificate issuer extension. Check
148 * for unhandled critical CRL entry extensions.
151 static int crl_set_issuers(X509_CRL *crl)
156 GENERAL_NAMES *gens, *gtmp;
157 STACK_OF(X509_REVOKED) *revoked;
159 revoked = X509_CRL_get_REVOKED(crl);
162 for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) {
163 X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
164 STACK_OF(X509_EXTENSION) *exts;
165 ASN1_ENUMERATED *reason;
167 gtmp = X509_REVOKED_get_ext_d2i(rev,
168 NID_certificate_issuer, &j, NULL);
169 if (!gtmp && (j != -1)) {
170 crl->flags |= EXFLAG_INVALID;
177 crl->issuers = sk_GENERAL_NAMES_new_null();
181 if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
186 reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL);
187 if (!reason && (j != -1)) {
188 crl->flags |= EXFLAG_INVALID;
193 rev->reason = ASN1_ENUMERATED_get(reason);
194 ASN1_ENUMERATED_free(reason);
196 rev->reason = CRL_REASON_NONE;
198 /* Check for critical CRL entry extensions */
200 exts = rev->extensions;
202 for (k = 0; k < sk_X509_EXTENSION_num(exts); k++) {
203 ext = sk_X509_EXTENSION_value(exts, k);
204 if (ext->critical > 0) {
205 if (OBJ_obj2nid(ext->object) == NID_certificate_issuer)
207 crl->flags |= EXFLAG_CRITICAL;
219 * The X509_CRL structure needs a bit of customisation. Cache some extensions
220 * and hash of the whole CRL.
222 static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
225 X509_CRL *crl = (X509_CRL *)*pval;
226 STACK_OF(X509_EXTENSION) *exts;
231 case ASN1_OP_NEW_POST:
236 crl->idp_reasons = CRLDP_ALL_REASONS;
237 crl->meth = default_crl_method;
238 crl->meth_data = NULL;
240 crl->crl_number = NULL;
241 crl->base_crl_number = NULL;
244 case ASN1_OP_D2I_POST:
245 X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
246 crl->idp = X509_CRL_get_ext_d2i(crl,
247 NID_issuing_distribution_point, NULL,
250 setup_idp(crl, crl->idp);
252 crl->akid = X509_CRL_get_ext_d2i(crl,
253 NID_authority_key_identifier, NULL,
256 crl->crl_number = X509_CRL_get_ext_d2i(crl,
257 NID_crl_number, NULL, NULL);
259 crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
262 /* Delta CRLs must have CRL number */
263 if (crl->base_crl_number && !crl->crl_number)
264 crl->flags |= EXFLAG_INVALID;
267 * See if we have any unhandled critical CRL extensions and indicate
268 * this in a flag. We only currently handle IDP so anything else
269 * critical sets the flag. This code accesses the X509_CRL structure
270 * directly: applications shouldn't do this.
273 exts = crl->crl->extensions;
275 for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) {
277 ext = sk_X509_EXTENSION_value(exts, idx);
278 nid = OBJ_obj2nid(ext->object);
279 if (nid == NID_freshest_crl)
280 crl->flags |= EXFLAG_FRESHEST;
281 if (ext->critical > 0) {
282 /* We handle IDP and deltas */
283 if ((nid == NID_issuing_distribution_point)
284 || (nid == NID_authority_key_identifier)
285 || (nid == NID_delta_crl))
287 crl->flags |= EXFLAG_CRITICAL;
292 if (!crl_set_issuers(crl))
295 if (crl->meth->crl_init) {
296 if (crl->meth->crl_init(crl) == 0)
301 case ASN1_OP_FREE_POST:
302 /* |crl->meth| may be NULL if constructing the object failed before
303 * |ASN1_OP_NEW_POST| was run. */
304 if (crl->meth && crl->meth->crl_free) {
305 if (!crl->meth->crl_free(crl))
309 AUTHORITY_KEYID_free(crl->akid);
311 ISSUING_DIST_POINT_free(crl->idp);
312 ASN1_INTEGER_free(crl->crl_number);
313 ASN1_INTEGER_free(crl->base_crl_number);
314 sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
320 /* Convert IDP into a more convenient form */
322 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
325 /* Set various flags according to IDP */
326 crl->idp_flags |= IDP_PRESENT;
327 if (idp->onlyuser > 0) {
329 crl->idp_flags |= IDP_ONLYUSER;
331 if (idp->onlyCA > 0) {
333 crl->idp_flags |= IDP_ONLYCA;
335 if (idp->onlyattr > 0) {
337 crl->idp_flags |= IDP_ONLYATTR;
341 crl->idp_flags |= IDP_INVALID;
343 if (idp->indirectCRL > 0)
344 crl->idp_flags |= IDP_INDIRECT;
346 if (idp->onlysomereasons) {
347 crl->idp_flags |= IDP_REASONS;
348 if (idp->onlysomereasons->length > 0)
349 crl->idp_reasons = idp->onlysomereasons->data[0];
350 if (idp->onlysomereasons->length > 1)
351 crl->idp_reasons |= (idp->onlysomereasons->data[1] << 8);
352 crl->idp_reasons &= CRLDP_ALL_REASONS;
355 DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
358 ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = {
359 ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO),
360 ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR),
361 ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING)
362 } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
364 IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
366 IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED)
368 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
369 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
370 IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
372 static int X509_REVOKED_cmp(const X509_REVOKED **a, const X509_REVOKED **b)
374 return (ASN1_STRING_cmp((ASN1_STRING *)(*a)->serialNumber,
375 (ASN1_STRING *)(*b)->serialNumber));
378 int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
383 inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
384 if (!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) {
385 OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
388 inf->enc.modified = 1;
392 int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
394 if (crl->meth->crl_verify)
395 return crl->meth->crl_verify(crl, r);
399 int X509_CRL_get0_by_serial(X509_CRL *crl,
400 X509_REVOKED **ret, ASN1_INTEGER *serial)
402 if (crl->meth->crl_lookup)
403 return crl->meth->crl_lookup(crl, ret, serial, NULL);
407 int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x)
409 if (crl->meth->crl_lookup)
410 return crl->meth->crl_lookup(crl, ret,
411 X509_get_serialNumber(x),
412 X509_get_issuer_name(x));
416 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
418 return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
419 crl->sig_alg, crl->signature, crl->crl, r));
422 static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm,
430 if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
436 nm = X509_CRL_get_issuer(crl);
438 for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) {
439 GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
440 if (gen->type != GEN_DIRNAME)
442 if (!X509_NAME_cmp(nm, gen->d.directoryName))
449 static struct CRYPTO_STATIC_MUTEX g_crl_sort_lock = CRYPTO_STATIC_MUTEX_INIT;
451 static int def_crl_lookup(X509_CRL *crl,
452 X509_REVOKED **ret, ASN1_INTEGER *serial,
455 X509_REVOKED rtmp, *rev;
457 rtmp.serialNumber = serial;
459 * Sort revoked into serial number order if not already sorted. Do this
460 * under a lock to avoid race condition.
463 CRYPTO_STATIC_MUTEX_lock_read(&g_crl_sort_lock);
464 const int is_sorted = sk_X509_REVOKED_is_sorted(crl->crl->revoked);
465 CRYPTO_STATIC_MUTEX_unlock_read(&g_crl_sort_lock);
468 CRYPTO_STATIC_MUTEX_lock_write(&g_crl_sort_lock);
469 if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked)) {
470 sk_X509_REVOKED_sort(crl->crl->revoked);
472 CRYPTO_STATIC_MUTEX_unlock_write(&g_crl_sort_lock);
475 if (!sk_X509_REVOKED_find(crl->crl->revoked, &idx, &rtmp))
477 /* Need to look for matching name */
478 for (; idx < sk_X509_REVOKED_num(crl->crl->revoked); idx++) {
479 rev = sk_X509_REVOKED_value(crl->crl->revoked, idx);
480 if (ASN1_INTEGER_cmp(rev->serialNumber, serial))
482 if (crl_revoked_issuer_match(crl, issuer, rev)) {
485 if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
493 void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
496 default_crl_method = &int_crl_meth;
498 default_crl_method = meth;
501 X509_CRL_METHOD *X509_CRL_METHOD_new(int (*crl_init) (X509_CRL *crl),
502 int (*crl_free) (X509_CRL *crl),
503 int (*crl_lookup) (X509_CRL *crl,
507 int (*crl_verify) (X509_CRL *crl,
511 m = OPENSSL_malloc(sizeof(X509_CRL_METHOD));
514 m->crl_init = crl_init;
515 m->crl_free = crl_free;
516 m->crl_lookup = crl_lookup;
517 m->crl_verify = crl_verify;
518 m->flags = X509_CRL_METHOD_DYNAMIC;
522 void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
524 if (!(m->flags & X509_CRL_METHOD_DYNAMIC))
529 void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
531 crl->meth_data = dat;
534 void *X509_CRL_get_meth_data(X509_CRL *crl)
536 return crl->meth_data;
539 IMPLEMENT_ASN1_SET_OF(X509_REVOKED)
541 IMPLEMENT_ASN1_SET_OF(X509_CRL)