src/third_party/boringssl/src/crypto/x509/x_crl.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   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.
   7  *
   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).
  14  *
  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.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  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)"
  39  *
  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
  50  * SUCH DAMAGE.
  51  *
  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.] */
  56
  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/x509.h>
  65 #include <openssl/x509v3.h>
  66
  67 #include "../asn1/asn1_locl.h"
  68
  69
  70 static int X509_REVOKED_cmp(const X509_REVOKED **a,
  71                                 const X509_REVOKED **b);
  72 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);
  73
  74 ASN1_SEQUENCE(X509_REVOKED) = {
  75         ASN1_SIMPLE(X509_REVOKED,serialNumber, ASN1_INTEGER),
  76         ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
  77         ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
  78 } ASN1_SEQUENCE_END(X509_REVOKED)
  79
  80 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
  81 static int def_crl_lookup(X509_CRL *crl,
  82                 X509_REVOKED **ret, ASN1_INTEGER *serial, X509_NAME *issuer);
  83
  84 static X509_CRL_METHOD int_crl_meth =
  85         {
  86         0,
  87         0,0,
  88         def_crl_lookup,
  89         def_crl_verify
  90         };
  91
  92 static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
  93
  94 /* The X509_CRL_INFO structure needs a bit of customisation.
  95  * Since we cache the original encoding the signature wont be affected by
  96  * reordering of the revoked field.
  97  */
  98 static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  99                                                                 void *exarg)
 100 {
 101         X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
 102
 103         if(!a || !a->revoked) return 1;
 104         switch(operation) {
 105                 /* Just set cmp function here. We don't sort because that
 106                  * would affect the output of X509_CRL_print().
 107                  */
 108                 case ASN1_OP_D2I_POST:
 109                 (void)sk_X509_REVOKED_set_cmp_func(a->revoked,X509_REVOKED_cmp);
 110                 break;
 111         }
 112         return 1;
 113 }
 114
 115
 116 ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
 117         ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
 118         ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR),
 119         ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
 120         ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
 121         ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
 122         ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
 123         ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
 124 } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
 125
 126 /* Set CRL entry issuer according to CRL certificate issuer extension.
 127  * Check for unhandled critical CRL entry extensions.
 128  */
 129
 130 static int crl_set_issuers(X509_CRL *crl)
 131         {
 132
 133         size_t i, k;
 134         int j;
 135         GENERAL_NAMES *gens, *gtmp;
 136         STACK_OF(X509_REVOKED) *revoked;
 137
 138         revoked = X509_CRL_get_REVOKED(crl);
 139
 140         gens = NULL;
 141         for (i = 0; i < sk_X509_REVOKED_num(revoked); i++)
 142                 {
 143                 X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
 144                 STACK_OF(X509_EXTENSION) *exts;
 145                 ASN1_ENUMERATED *reason;
 146                 X509_EXTENSION *ext;
 147                 gtmp = X509_REVOKED_get_ext_d2i(rev,
 148                                                 NID_certificate_issuer,
 149                                                 &j, NULL);
 150                 if (!gtmp && (j != -1))
 151                         {
 152                         crl->flags |= EXFLAG_INVALID;
 153                         return 1;
 154                         }
 155
 156                 if (gtmp)
 157                         {
 158                         gens = gtmp;
 159                         if (!crl->issuers)
 160                                 {
 161                                 crl->issuers = sk_GENERAL_NAMES_new_null();
 162                                 if (!crl->issuers)
 163                                         return 0;
 164                                 }
 165                         if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
 166                                 return 0;
 167                         }
 168                 rev->issuer = gens;
 169
 170                 reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason,
 171                                                                 &j, NULL);
 172                 if (!reason && (j != -1))
 173                         {
 174                         crl->flags |= EXFLAG_INVALID;
 175                         return 1;
 176                         }
 177
 178                 if (reason)
 179                         {
 180                         rev->reason = ASN1_ENUMERATED_get(reason);
 181                         ASN1_ENUMERATED_free(reason);
 182                         }
 183                 else
 184                         rev->reason = CRL_REASON_NONE;
 185
 186                 /* Check for critical CRL entry extensions */
 187
 188                 exts = rev->extensions;
 189
 190                 for (k = 0; k < sk_X509_EXTENSION_num(exts); k++)
 191                         {
 192                         ext = sk_X509_EXTENSION_value(exts, k);
 193                         if (ext->critical > 0)
 194                                 {
 195                                 if (OBJ_obj2nid(ext->object) ==
 196                                         NID_certificate_issuer)
 197                                         continue;
 198                                 crl->flags |= EXFLAG_CRITICAL;
 199                                 break;
 200                                 }
 201                         }
 202
 203
 204                 }
 205
 206         return 1;
 207
 208         }
 209
 210 /* The X509_CRL structure needs a bit of customisation. Cache some extensions
 211  * and hash of the whole CRL.
 212  */
 213 static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 214                                                                 void *exarg)
 215         {
 216         X509_CRL *crl = (X509_CRL *)*pval;
 217         STACK_OF(X509_EXTENSION) *exts;
 218         X509_EXTENSION *ext;
 219         size_t idx;
 220
 221         switch(operation)
 222                 {
 223                 case ASN1_OP_NEW_POST:
 224                 crl->idp = NULL;
 225                 crl->akid = NULL;
 226                 crl->flags = 0;
 227                 crl->idp_flags = 0;
 228                 crl->idp_reasons = CRLDP_ALL_REASONS;
 229                 crl->meth = default_crl_method;
 230                 crl->meth_data = NULL;
 231                 crl->issuers = NULL;
 232                 crl->crl_number = NULL;
 233                 crl->base_crl_number = NULL;
 234                 break;
 235
 236                 case ASN1_OP_D2I_POST:
 237                 X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
 238                 crl->idp = X509_CRL_get_ext_d2i(crl,
 239                                 NID_issuing_distribution_point, NULL, NULL);
 240                 if (crl->idp)
 241                         setup_idp(crl, crl->idp);
 242
 243                 crl->akid = X509_CRL_get_ext_d2i(crl,
 244                                 NID_authority_key_identifier, NULL, NULL);
 245
 246                 crl->crl_number = X509_CRL_get_ext_d2i(crl,
 247                                 NID_crl_number, NULL, NULL);
 248
 249                 crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
 250                                 NID_delta_crl, NULL, NULL);
 251                 /* Delta CRLs must have CRL number */
 252                 if (crl->base_crl_number && !crl->crl_number)
 253                         crl->flags |= EXFLAG_INVALID;
 254
 255                 /* See if we have any unhandled critical CRL extensions and
 256                  * indicate this in a flag. We only currently handle IDP so
 257                  * anything else critical sets the flag.
 258                  *
 259                  * This code accesses the X509_CRL structure directly:
 260                  * applications shouldn't do this.
 261                  */
 262
 263                 exts = crl->crl->extensions;
 264
 265                 for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++)
 266                         {
 267                         int nid;
 268                         ext = sk_X509_EXTENSION_value(exts, idx);
 269                         nid = OBJ_obj2nid(ext->object);
 270                         if (nid == NID_freshest_crl)
 271                                 crl->flags |= EXFLAG_FRESHEST;
 272                         if (ext->critical > 0)
 273                                 {
 274                                 /* We handle IDP and deltas */
 275                                 if ((nid == NID_issuing_distribution_point)
 276                                         || (nid == NID_authority_key_identifier)
 277                                         || (nid == NID_delta_crl))
 278                                         break;;
 279                                 crl->flags |= EXFLAG_CRITICAL;
 280                                 break;
 281                                 }
 282                         }
 283
 284
 285                 if (!crl_set_issuers(crl))
 286                         return 0;
 287
 288                 if (crl->meth->crl_init)
 289                         {
 290                         if (crl->meth->crl_init(crl) == 0)
 291                                 return 0;
 292                         }
 293                 break;
 294
 295                 case ASN1_OP_FREE_POST:
 296                 if (crl->meth->crl_free)
 297                         {
 298                         if (!crl->meth->crl_free(crl))
 299                                 return 0;
 300                         }
 301                 if (crl->akid)
 302                         AUTHORITY_KEYID_free(crl->akid);
 303                 if (crl->idp)
 304                         ISSUING_DIST_POINT_free(crl->idp);
 305                 ASN1_INTEGER_free(crl->crl_number);
 306                 ASN1_INTEGER_free(crl->base_crl_number);
 307                 sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
 308                 break;
 309                 }
 310         return 1;
 311         }
 312
 313 /* Convert IDP into a more convenient form */
 314
 315 static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
 316         {
 317         int idp_only = 0;
 318         /* Set various flags according to IDP */
 319         crl->idp_flags |= IDP_PRESENT;
 320         if (idp->onlyuser > 0)
 321                 {
 322                 idp_only++;
 323                 crl->idp_flags |= IDP_ONLYUSER;
 324                 }
 325         if (idp->onlyCA > 0)
 326                 {
 327                 idp_only++;
 328                 crl->idp_flags |= IDP_ONLYCA;
 329                 }
 330         if (idp->onlyattr > 0)
 331                 {
 332                 idp_only++;
 333                 crl->idp_flags |= IDP_ONLYATTR;
 334                 }
 335
 336         if (idp_only > 1)
 337                 crl->idp_flags |= IDP_INVALID;
 338
 339         if (idp->indirectCRL > 0)
 340                 crl->idp_flags |= IDP_INDIRECT;
 341
 342         if (idp->onlysomereasons)
 343                 {
 344                 crl->idp_flags |= IDP_REASONS;
 345                 if (idp->onlysomereasons->length > 0)
 346                         crl->idp_reasons = idp->onlysomereasons->data[0];
 347                 if (idp->onlysomereasons->length > 1)
 348                         crl->idp_reasons |=
 349                                 (idp->onlysomereasons->data[1] << 8);
 350                 crl->idp_reasons &= CRLDP_ALL_REASONS;
 351                 }
 352
 353         DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
 354         }
 355
 356 ASN1_SEQUENCE_ref(X509_CRL, crl_cb, CRYPTO_LOCK_X509_CRL) = {
 357         ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO),
 358         ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR),
 359         ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING)
 360 } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
 361
 362 IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
 363 IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED)
 364 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
 365 IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
 366 IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
 367
 368 static int X509_REVOKED_cmp(const X509_REVOKED **a,
 369                         const X509_REVOKED **b)
 370         {
 371         return(ASN1_STRING_cmp(
 372                 (ASN1_STRING *)(*a)->serialNumber,
 373                 (ASN1_STRING *)(*b)->serialNumber));
 374         }
 375
 376 int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
 377 {
 378         X509_CRL_INFO *inf;
 379         inf = crl->crl;
 380         if(!inf->revoked)
 381                 inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
 382         if(!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) {
 383                 OPENSSL_PUT_ERROR(X509, X509_CRL_add0_revoked, ERR_R_MALLOC_FAILURE);
 384                 return 0;
 385         }
 386         inf->enc.modified = 1;
 387         return 1;
 388 }
 389
 390 int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
 391         {
 392         if (crl->meth->crl_verify)
 393                 return crl->meth->crl_verify(crl, r);
 394         return 0;
 395         }
 396
 397 int X509_CRL_get0_by_serial(X509_CRL *crl,
 398                 X509_REVOKED **ret, ASN1_INTEGER *serial)
 399         {
 400         if (crl->meth->crl_lookup)
 401                 return crl->meth->crl_lookup(crl, ret, serial, NULL);
 402         return 0;
 403         }
 404
 405 int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x)
 406         {
 407         if (crl->meth->crl_lookup)
 408                 return crl->meth->crl_lookup(crl, ret,
 409                                                 X509_get_serialNumber(x),
 410                                                 X509_get_issuer_name(x));
 411         return 0;
 412         }
 413
 414 static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
 415         {
 416         return(ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
 417                 crl->sig_alg, crl->signature,crl->crl,r));
 418         }
 419
 420 static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm,
 421                                                 X509_REVOKED *rev)
 422         {
 423         size_t i;
 424
 425         if (!rev->issuer)
 426                 {
 427                 if (!nm)
 428                         return 1;
 429                 if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
 430                         return 1;
 431                 return 0;
 432                 }
 433
 434         if (!nm)
 435                 nm = X509_CRL_get_issuer(crl);
 436
 437         for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++)
 438                 {
 439                 GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
 440                 if (gen->type != GEN_DIRNAME)
 441                         continue;
 442                 if (!X509_NAME_cmp(nm, gen->d.directoryName))
 443                         return 1;
 444                 }
 445         return 0;
 446
 447         }
 448
 449 static int def_crl_lookup(X509_CRL *crl,
 450                 X509_REVOKED **ret, ASN1_INTEGER *serial, X509_NAME *issuer)
 451         {
 452         X509_REVOKED rtmp, *rev;
 453         size_t idx;
 454         rtmp.serialNumber = serial;
 455         /* Sort revoked into serial number order if not already sorted.
 456          * Do this under a lock to avoid race condition.
 457          */
 458         if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked))
 459                 {
 460                 CRYPTO_w_lock(CRYPTO_LOCK_X509_CRL);
 461                 sk_X509_REVOKED_sort(crl->crl->revoked);
 462                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_CRL);
 463                 }
 464         if (!sk_X509_REVOKED_find(crl->crl->revoked, &idx, &rtmp))
 465                 return 0;
 466         /* Need to look for matching name */
 467         for(;idx < sk_X509_REVOKED_num(crl->crl->revoked); idx++)
 468                 {
 469                 rev = sk_X509_REVOKED_value(crl->crl->revoked, idx);
 470                 if (ASN1_INTEGER_cmp(rev->serialNumber, serial))
 471                         return 0;
 472                 if (crl_revoked_issuer_match(crl, issuer, rev))
 473                         {
 474                         if (ret)
 475                                 *ret = rev;
 476                         if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
 477                                 return 2;
 478                         return 1;
 479                         }
 480                 }
 481         return 0;
 482         }
 483
 484 void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
 485         {
 486         if (meth == NULL)
 487                 default_crl_method = &int_crl_meth;
 488         else
 489                 default_crl_method = meth;
 490         }
 491
 492 X509_CRL_METHOD *X509_CRL_METHOD_new(
 493         int (*crl_init)(X509_CRL *crl),
 494         int (*crl_free)(X509_CRL *crl),
 495         int (*crl_lookup)(X509_CRL *crl, X509_REVOKED **ret,
 496                                 ASN1_INTEGER *ser, X509_NAME *issuer),
 497         int (*crl_verify)(X509_CRL *crl, EVP_PKEY *pk))
 498         {
 499         X509_CRL_METHOD *m;
 500         m = OPENSSL_malloc(sizeof(X509_CRL_METHOD));
 501         if (!m)
 502                 return NULL;
 503         m->crl_init = crl_init;
 504         m->crl_free = crl_free;
 505         m->crl_lookup = crl_lookup;
 506         m->crl_verify = crl_verify;
 507         m->flags = X509_CRL_METHOD_DYNAMIC;
 508         return m;
 509         }
 510
 511 void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
 512         {
 513         if (!(m->flags & X509_CRL_METHOD_DYNAMIC))
 514                 return;
 515         OPENSSL_free(m);
 516         }
 517
 518 void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
 519         {
 520         crl->meth_data = dat;
 521         }
 522
 523 void *X509_CRL_get_meth_data(X509_CRL *crl)
 524         {
 525         return crl->meth_data;
 526         }
 527
 528 IMPLEMENT_ASN1_SET_OF(X509_REVOKED)
 529 IMPLEMENT_ASN1_SET_OF(X509_CRL)