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 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)