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
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  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 /* The X509_CRL_INFO structure needs a bit of customisation.
  77  * Since we cache the original encoding the signature wont be affected by
  78  * reordering of the revoked field.
  79  */
  80 static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  81                                                                 void *exarg)
  82 {
  83         X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
  84
  85         if(!a || !a->revoked) return 1;
  86         switch(operation) {
  87                 /* Just set cmp function here. We don't sort because that
  88                  * would affect the output of X509_CRL_print().
  89                  */
  90                 case ASN1_OP_D2I_POST:
  91                 sk_X509_REVOKED_set_cmp_func(a->revoked,X509_REVOKED_cmp);
  92                 break;
  93         }
  94         return 1;
  95 }
  96
  97
  98 ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
  99         ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
 100         ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR),
 101         ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
 102         ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
 103         ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
 104         ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
 105         ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
 106 } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
 107
 108 /* The X509_CRL structure needs a bit of customisation. Cache some extensions
 109  * and hash of the whole CRL.
 110  */
 111 static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 112                                                                 void *exarg)
 113         {
 114         X509_CRL *crl = (X509_CRL *)*pval;
 115         STACK_OF(X509_EXTENSION) *exts;
 116         X509_EXTENSION *ext;
 117         int idx;
 118
 119         switch(operation)
 120                 {
 121                 case ASN1_OP_NEW_POST:
 122                 crl->idp = NULL;
 123                 crl->akid = NULL;
 124                 crl->flags = 0;
 125                 crl->idp_flags = 0;
 126                 crl->meth = 0;
 127                 break;
 128
 129                 case ASN1_OP_D2I_POST:
 130 #ifndef OPENSSL_NO_SHA
 131                 X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
 132 #endif
 133                 crl->idp = X509_CRL_get_ext_d2i(crl,
 134                                 NID_issuing_distribution_point, NULL, NULL);
 135                 if (crl->idp)
 136                         setup_idp(crl, crl->idp);
 137
 138                 crl->akid = X509_CRL_get_ext_d2i(crl,
 139                                 NID_authority_key_identifier, NULL, NULL);
 140
 141                 /* See if we have any unhandled critical CRL extensions and
 142                  * indicate this in a flag. We only currently handle IDP so
 143                  * anything else critical sets the flag.
 144                  *
 145                  * This code accesses the X509_CRL structure directly:
 146                  * applications shouldn't do this.
 147                  */
 148
 149                 exts = crl->crl->extensions;
 150
 151                 for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++)
 152                         {
 153                         ext = sk_X509_EXTENSION_value(exts, idx);
 154                         if (ext->critical > 0)
 155                                 {
 156                                 /* We handle IDP now so permit it */
 157                                 if (OBJ_obj2nid(ext->object) ==
 158                                         NID_issuing_distribution_point)
 159                                         continue;
 160                                 crl->flags |= EXFLAG_CRITICAL;
 161                                 break;
 162                                 }
 163                         }
 164                 if (crl->meth && crl->meth->crl_init)
 165                         return crl->meth->crl_init(crl);
 166                 break;
 167
 168                 case ASN1_OP_FREE_POST:
 169                 if (crl->meth && crl->meth->crl_free)
 170                         return crl->meth->crl_free(crl);
 171                 if (crl->akid)
 172                         AUTHORITY_KEYID_free(crl->akid);
 173                 if (crl->idp)
 174                         ISSUING_DIST_POINT_free(crl->idp);
 175                 break;
 176                 }
 177         return 1;
 178         }
 179
 180 /* Convert IDP into a more convenient form */
 181
 182 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
 183         {
 184         int idp_only = 0;
 185         /* Set various flags according to IDP */
 186         crl->idp_flags |= IDP_PRESENT;
 187         if (idp->onlyuser > 0)
 188                 {
 189                 idp_only++;
 190                 crl->idp_flags |= IDP_ONLYUSER;
 191                 }
 192         if (idp->onlyCA > 0)
 193                 {
 194                 idp_only++;
 195                 crl->idp_flags |= IDP_ONLYCA;
 196                 }
 197         if (idp->onlyattr > 0)
 198                 {
 199                 idp_only++;
 200                 crl->idp_flags |= IDP_ONLYATTR;
 201                 }
 202
 203         if (idp_only > 1)
 204                 crl->idp_flags |= IDP_INVALID;
 205
 206         if (idp->indirectCRL > 0)
 207                 crl->idp_flags |= IDP_INDIRECT;
 208
 209         if (idp->onlysomereasons)
 210                 {
 211                 crl->idp_flags |= IDP_REASONS;
 212                 if (idp->onlysomereasons->length > 0)
 213                         crl->idp_reasons = idp->onlysomereasons->data[0];
 214                 if (idp->onlysomereasons->length > 1)
 215                         crl->idp_reasons |=
 216                                 (idp->onlysomereasons->data[1] << 8);
 217                 }
 218         }
 219
 220 ASN1_SEQUENCE_ref(X509_CRL, crl_cb, CRYPTO_LOCK_X509_CRL) = {
 221         ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO),
 222         ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR),
 223         ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING)
 224 } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
 225
 226 IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
 227 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
 228 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
 229 IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
 230
 231 static int X509_REVOKED_cmp(const X509_REVOKED * const *a,
 232                         const X509_REVOKED * const *b)
 233         {
 234         return(ASN1_STRING_cmp(
 235                 (ASN1_STRING *)(*a)->serialNumber,
 236                 (ASN1_STRING *)(*b)->serialNumber));
 237         }
 238
 239 int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
 240 {
 241         X509_CRL_INFO *inf;
 242         inf = crl->crl;
 243         if(!inf->revoked)
 244                 inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
 245         if(!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) {
 246                 ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
 247                 return 0;
 248         }
 249         inf->enc.modified = 1;
 250         return 1;
 251 }
 252
 253 int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
 254         {
 255         if (crl->meth && crl->meth->crl_verify)
 256                 return crl->meth->crl_verify(crl, r);
 257         return(ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
 258                 crl->sig_alg, crl->signature,crl->crl,r));
 259         }
 260
 261 int X509_CRL_get0_by_serial(X509_CRL *crl,
 262                 X509_REVOKED **ret, ASN1_INTEGER *serial)
 263         {
 264         X509_REVOKED rtmp;
 265         int idx;
 266         if (crl->meth && crl->meth->crl_lookup)
 267                 return crl->meth->crl_lookup(crl, ret, serial);
 268         rtmp.serialNumber = serial;
 269         /* Sort revoked into serial number order if not already sorted.
 270          * Do this under a lock to avoid race condition.
 271          */
 272         if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked))
 273                 {
 274                 CRYPTO_w_lock(CRYPTO_LOCK_X509_CRL);
 275                 sk_X509_REVOKED_sort(crl->crl->revoked);
 276                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_CRL);
 277                 }
 278         idx = sk_X509_REVOKED_find(crl->crl->revoked, &rtmp);
 279         /* If found assume revoked: want something cleverer than
 280          * this to handle entry extensions in V2 CRLs.
 281          */
 282         if(idx >= 0)
 283                 {
 284                 if (ret)
 285                         *ret = sk_X509_REVOKED_value(crl->crl->revoked, idx);
 286                 return 1;
 287                 }
 288         return 0;
 289         }
 290
 291 IMPLEMENT_STACK_OF(X509_REVOKED)
 292 IMPLEMENT_ASN1_SET_OF(X509_REVOKED)
 293 IMPLEMENT_STACK_OF(X509_CRL)
 294 IMPLEMENT_ASN1_SET_OF(X509_CRL)