Support for certificateIssuer CRL entry extension.
[openssl.git] / crypto / asn1 / x_crl.c
1 /* crypto/asn1/x_crl.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include "asn1_locl.h"
62 #include <openssl/asn1t.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65
66 static int X509_REVOKED_cmp(const X509_REVOKED * const *a,
67                                 const X509_REVOKED * const *b);
68 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);
69
70 ASN1_SEQUENCE(X509_REVOKED) = {
71         ASN1_SIMPLE(X509_REVOKED,serialNumber, ASN1_INTEGER),
72         ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
73         ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
74 } ASN1_SEQUENCE_END(X509_REVOKED)
75
76 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
77 static int def_crl_lookup(X509_CRL *crl,
78                 X509_REVOKED **ret, ASN1_INTEGER *serial);
79
80 static X509_CRL_METHOD int_crl_meth =
81         {
82         0,
83         0,0,
84         def_crl_lookup,
85         def_crl_verify
86         };
87
88 static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
89
90 /* The X509_CRL_INFO structure needs a bit of customisation.
91  * Since we cache the original encoding the signature wont be affected by
92  * reordering of the revoked field.
93  */
94 static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
95                                                                 void *exarg)
96 {
97         X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
98
99         if(!a || !a->revoked) return 1;
100         switch(operation) {
101                 /* Just set cmp function here. We don't sort because that
102                  * would affect the output of X509_CRL_print().
103                  */
104                 case ASN1_OP_D2I_POST:
105                 (void)sk_X509_REVOKED_set_cmp_func(a->revoked,X509_REVOKED_cmp);
106                 break;
107         }
108         return 1;
109 }
110
111
112 ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
113         ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
114         ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR),
115         ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
116         ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
117         ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
118         ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
119         ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
120 } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
121
122 /* The X509_CRL structure needs a bit of customisation. Cache some extensions
123  * and hash of the whole CRL.
124  */
125 static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
126                                                                 void *exarg)
127         {
128         X509_CRL *crl = (X509_CRL *)*pval;
129         STACK_OF(X509_EXTENSION) *exts;
130         X509_EXTENSION *ext;
131         int idx;
132
133         switch(operation)
134                 {
135                 case ASN1_OP_NEW_POST:
136                 crl->idp = NULL;
137                 crl->akid = NULL;
138                 crl->flags = 0;
139                 crl->idp_flags = 0;
140                 crl->meth = default_crl_method;
141                 crl->meth_data = NULL;
142                 break;
143
144                 case ASN1_OP_D2I_POST:
145 #ifndef OPENSSL_NO_SHA
146                 X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
147 #endif
148                 crl->idp = X509_CRL_get_ext_d2i(crl,
149                                 NID_issuing_distribution_point, NULL, NULL);
150                 if (crl->idp)
151                         setup_idp(crl, crl->idp);
152
153                 crl->akid = X509_CRL_get_ext_d2i(crl,
154                                 NID_authority_key_identifier, NULL, NULL);      
155
156                 /* See if we have any unhandled critical CRL extensions and 
157                  * indicate this in a flag. We only currently handle IDP so
158                  * anything else critical sets the flag.
159                  *
160                  * This code accesses the X509_CRL structure directly:
161                  * applications shouldn't do this.
162                  */
163
164                 exts = crl->crl->extensions;
165
166                 for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++)
167                         {
168                         ext = sk_X509_EXTENSION_value(exts, idx);
169                         if (ext->critical > 0)
170                                 {
171                                 /* We handle IDP now so permit it */
172                                 if (OBJ_obj2nid(ext->object) ==
173                                         NID_issuing_distribution_point)
174                                         continue;
175                                 crl->flags |= EXFLAG_CRITICAL;
176                                 break;
177                                 }
178                         }
179                 if (crl->meth->crl_init)
180                         {
181                         if (crl->meth->crl_init(crl) == 0)
182                                 return 0;
183                         }
184                 break;
185
186                 case ASN1_OP_FREE_POST:
187                 if (crl->meth->crl_free)
188                         {
189                         if (!crl->meth->crl_free(crl))
190                                 return 0;
191                         }
192                 if (crl->akid)
193                         AUTHORITY_KEYID_free(crl->akid);
194                 if (crl->idp)
195                         ISSUING_DIST_POINT_free(crl->idp);
196                 break;
197                 }
198         return 1;
199         }
200
201 /* Convert IDP into a more convenient form */
202
203 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
204         {
205         int idp_only = 0;
206         /* Set various flags according to IDP */
207         crl->idp_flags |= IDP_PRESENT;
208         if (idp->onlyuser > 0)
209                 {
210                 idp_only++;
211                 crl->idp_flags |= IDP_ONLYUSER;
212                 }
213         if (idp->onlyCA > 0)
214                 {
215                 idp_only++;
216                 crl->idp_flags |= IDP_ONLYCA;
217                 }
218         if (idp->onlyattr > 0)
219                 {
220                 idp_only++;
221                 crl->idp_flags |= IDP_ONLYATTR;
222                 }
223
224         if (idp_only > 1)
225                 crl->idp_flags |= IDP_INVALID;
226
227         if (idp->indirectCRL > 0)
228                 crl->idp_flags |= IDP_INDIRECT;
229
230         if (idp->onlysomereasons)
231                 {
232                 crl->idp_flags |= IDP_REASONS;
233                 if (idp->onlysomereasons->length > 0)
234                         crl->idp_reasons = idp->onlysomereasons->data[0];
235                 if (idp->onlysomereasons->length > 1)
236                         crl->idp_reasons |=
237                                 (idp->onlysomereasons->data[1] << 8);
238                 }
239
240         DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
241         }
242
243 ASN1_SEQUENCE_ref(X509_CRL, crl_cb, CRYPTO_LOCK_X509_CRL) = {
244         ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO),
245         ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR),
246         ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING)
247 } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
248
249 IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
250 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
251 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
252 IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
253
254 static int X509_REVOKED_cmp(const X509_REVOKED * const *a,
255                         const X509_REVOKED * const *b)
256         {
257         return(ASN1_STRING_cmp(
258                 (ASN1_STRING *)(*a)->serialNumber,
259                 (ASN1_STRING *)(*b)->serialNumber));
260         }
261
262 int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
263 {
264         X509_CRL_INFO *inf;
265         inf = crl->crl;
266         if(!inf->revoked)
267                 inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
268         if(!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) {
269                 ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
270                 return 0;
271         }
272         inf->enc.modified = 1;
273         return 1;
274 }
275
276 int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
277         {
278         if (crl->meth->crl_verify)
279                 return crl->meth->crl_verify(crl, r);
280         return 0;
281         }
282
283 int X509_CRL_get0_by_serial(X509_CRL *crl,
284                 X509_REVOKED **ret, ASN1_INTEGER *serial)
285         {
286         if (crl->meth->crl_lookup)
287                 return crl->meth->crl_lookup(crl, ret, serial);
288         return 0;
289         }
290
291 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
292         {
293         return(ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
294                 crl->sig_alg, crl->signature,crl->crl,r));
295         }
296
297 static int def_crl_lookup(X509_CRL *crl,
298                 X509_REVOKED **ret, ASN1_INTEGER *serial)
299         {
300         X509_REVOKED rtmp;
301         int idx;
302         rtmp.serialNumber = serial;
303         /* Sort revoked into serial number order if not already sorted.
304          * Do this under a lock to avoid race condition.
305          */
306         if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked))
307                 {
308                 CRYPTO_w_lock(CRYPTO_LOCK_X509_CRL);
309                 sk_X509_REVOKED_sort(crl->crl->revoked);
310                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_CRL);
311                 }
312         idx = sk_X509_REVOKED_find(crl->crl->revoked, &rtmp);
313         /* If found assume revoked: want something cleverer than
314          * this to handle entry extensions in V2 CRLs.
315          */
316         if(idx >= 0)
317                 {
318                 if (ret)
319                         *ret = sk_X509_REVOKED_value(crl->crl->revoked, idx);
320                 return 1;
321                 }
322         return 0;
323         }
324
325 void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
326         {
327         if (meth == NULL)
328                 default_crl_method = &int_crl_meth;
329         else 
330                 default_crl_method = meth;
331         }
332
333 X509_CRL_METHOD *X509_CRL_METHOD_new(
334         int (*crl_init)(X509_CRL *crl),
335         int (*crl_free)(X509_CRL *crl),
336         int (*crl_lookup)(X509_CRL *crl, X509_REVOKED **ret, ASN1_INTEGER *ser),
337         int (*crl_verify)(X509_CRL *crl, EVP_PKEY *pk))
338         {
339         X509_CRL_METHOD *m;
340         m = OPENSSL_malloc(sizeof(X509_CRL_METHOD));
341         if (!m)
342                 return NULL;
343         m->crl_init = crl_init;
344         m->crl_free = crl_free;
345         m->crl_lookup = crl_lookup;
346         m->crl_verify = crl_verify;
347         m->flags = X509_CRL_METHOD_DYNAMIC;
348         return m;
349         }
350
351 void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
352         {
353         if (!(m->flags & X509_CRL_METHOD_DYNAMIC))
354                 return;
355         OPENSSL_free(m);
356         }
357
358 void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
359         {
360         crl->meth_data = dat;
361         }
362
363 void *X509_CRL_get_meth_data(X509_CRL *crl)
364         {
365         return crl->meth_data;
366         }
367
368 IMPLEMENT_STACK_OF(X509_REVOKED)
369 IMPLEMENT_ASN1_SET_OF(X509_REVOKED)
370 IMPLEMENT_STACK_OF(X509_CRL)
371 IMPLEMENT_ASN1_SET_OF(X509_CRL)