crypto/cms/cms_lib.c

   1 /* crypto/cms/cms_lib.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54 #include <openssl/asn1t.h>
  55 #include <openssl/x509v3.h>
  56 #include <openssl/err.h>
  57 #include <openssl/pem.h>
  58 #include <openssl/bio.h>
  59 #include <openssl/asn1.h>
  60 #include "cms.h"
  61 #include "cms_lcl.h"
  62
  63 IMPLEMENT_ASN1_FUNCTIONS(CMS_ContentInfo)
  64 IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
  65
  66 DECLARE_ASN1_ITEM(CMS_CertificateChoices)
  67 DECLARE_ASN1_ITEM(CMS_RevocationInfoChoice)
  68 DECLARE_STACK_OF(CMS_CertificateChoices)
  69 DECLARE_STACK_OF(CMS_RevocationInfoChoice)
  70
  71 const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms)
  72         {
  73         return cms->contentType;
  74         }
  75
  76 CMS_ContentInfo *cms_Data_create(void)
  77         {
  78         CMS_ContentInfo *cms;
  79         cms = CMS_ContentInfo_new();
  80         if (cms)
  81                 {
  82                 cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
  83                 /* Never detached */
  84                 CMS_set_detached(cms, 0);
  85                 }
  86         return cms;
  87         }
  88
  89 BIO *cms_content_bio(CMS_ContentInfo *cms)
  90         {
  91         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
  92         if (!pos)
  93                 return NULL;
  94         /* If content detached data goes nowhere: create NULL BIO */
  95         if (!*pos)
  96                 return BIO_new(BIO_s_null());
  97         /* If content not detached and created return memory BIO
  98          */
  99         if (!*pos || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
 100                 return BIO_new(BIO_s_mem());
 101         /* Else content was read in: return read only BIO for it */
 102         return BIO_new_mem_buf((*pos)->data, (*pos)->length);
 103         }
 104
 105 BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
 106         {
 107         BIO *cmsbio, *cont;
 108         if (icont)
 109                 cont = icont;
 110         else
 111                 cont = cms_content_bio(cms);
 112         if (!cont)
 113                 {
 114                 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_NO_CONTENT);
 115                 return NULL;
 116                 }
 117         switch (OBJ_obj2nid(cms->contentType))
 118                 {
 119
 120                 case NID_pkcs7_data:
 121                 return cont;
 122
 123                 case NID_pkcs7_signed:
 124                 cmsbio = cms_SignedData_init_bio(cms);
 125                 break;
 126
 127                 case NID_pkcs7_digest:
 128                 cmsbio = cms_DigestedData_init_bio(cms);
 129                 break;
 130 #ifdef ZLIB
 131                 case NID_id_smime_ct_compressedData:
 132                 cmsbio = cms_CompressedData_init_bio(cms);
 133                 break;
 134 #endif
 135
 136                 case NID_pkcs7_encrypted:
 137                 cmsbio = cms_EncryptedData_init_bio(cms);
 138                 break;
 139
 140                 case NID_pkcs7_enveloped:
 141                 cmsbio = cms_EnvelopedData_init_bio(cms);
 142                 break;
 143
 144                 default:
 145                 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
 146                 return NULL;
 147                 }
 148
 149         if (cmsbio)
 150                 return BIO_push(cmsbio, cont);
 151
 152         if (!icont)
 153                 BIO_free(cont);
 154         return NULL;
 155
 156         }
 157
 158 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
 159         {
 160         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 161         if (!pos)
 162                 return 0;
 163         /* If ebmedded content find memory BIO and set content */
 164         if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT))
 165                 {
 166                 BIO *mbio;
 167                 unsigned char *cont;
 168                 long contlen;
 169                 mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
 170                 if (!mbio)
 171                         {
 172                         CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
 173                         return 0;
 174                         }
 175                 contlen = BIO_get_mem_data(mbio, &cont);
 176                 /* Set bio as read only so its content can't be clobbered */
 177                 BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
 178                 BIO_set_mem_eof_return(mbio, 0);
 179                 ASN1_STRING_set0(*pos, cont, contlen);
 180                 (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
 181                 }
 182
 183         switch (OBJ_obj2nid(cms->contentType))
 184                 {
 185
 186                 case NID_pkcs7_data:
 187                 case NID_pkcs7_enveloped:
 188                 case NID_pkcs7_encrypted:
 189                 case NID_id_smime_ct_compressedData:
 190                 /* Nothing to do */
 191                 return 1;
 192
 193                 case NID_pkcs7_signed:
 194                 return cms_SignedData_final(cms, cmsbio);
 195
 196                 case NID_pkcs7_digest:
 197                 return cms_DigestedData_do_final(cms, cmsbio, 0);
 198
 199                 default:
 200                 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
 201                 return 0;
 202                 }
 203         }
 204
 205 /* Return an OCTET STRING pointer to content. This allows it to
 206  * be accessed or set later.
 207  */
 208
 209 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
 210         {
 211         switch (OBJ_obj2nid(cms->contentType))
 212                 {
 213
 214                 case NID_pkcs7_data:
 215                 return &cms->d.data;
 216
 217                 case NID_pkcs7_signed:
 218                 return &cms->d.signedData->encapContentInfo->eContent;
 219
 220                 case NID_pkcs7_enveloped:
 221                 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
 222
 223                 case NID_pkcs7_digest:
 224                 return &cms->d.digestedData->encapContentInfo->eContent;
 225
 226                 case NID_pkcs7_encrypted:
 227                 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
 228
 229                 case NID_id_smime_ct_authData:
 230                 return &cms->d.authenticatedData->encapContentInfo->eContent;
 231
 232                 case NID_id_smime_ct_compressedData:
 233                 return &cms->d.compressedData->encapContentInfo->eContent;
 234
 235                 default:
 236                 if (cms->d.other->type == V_ASN1_OCTET_STRING)
 237                         return &cms->d.other->value.octet_string;
 238                 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 239                 return NULL;
 240
 241                 }
 242         }
 243
 244 /* Return an ASN1_OBJECT pointer to content type. This allows it to
 245  * be accessed or set later.
 246  */
 247
 248 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
 249         {
 250         switch (OBJ_obj2nid(cms->contentType))
 251                 {
 252
 253                 case NID_pkcs7_signed:
 254                 return &cms->d.signedData->encapContentInfo->eContentType;
 255
 256                 case NID_pkcs7_enveloped:
 257                 return &cms->d.envelopedData->encryptedContentInfo->contentType;
 258
 259                 case NID_pkcs7_digest:
 260                 return &cms->d.digestedData->encapContentInfo->eContentType;
 261
 262                 case NID_pkcs7_encrypted:
 263                 return &cms->d.encryptedData->encryptedContentInfo->contentType;
 264
 265                 case NID_id_smime_ct_authData:
 266                 return &cms->d.authenticatedData->encapContentInfo->eContentType;
 267
 268                 case NID_id_smime_ct_compressedData:
 269                 return &cms->d.compressedData->encapContentInfo->eContentType;
 270
 271                 default:
 272                 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
 273                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 274                 return NULL;
 275
 276                 }
 277         }
 278
 279 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
 280         {
 281         ASN1_OBJECT **petype;
 282         petype = cms_get0_econtent_type(cms);
 283         if (petype)
 284                 return *petype;
 285         return NULL;
 286         }
 287
 288 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
 289         {
 290         ASN1_OBJECT **petype, *etype;
 291         petype = cms_get0_econtent_type(cms);
 292         if (!petype)
 293                 return 0;
 294         if (!oid)
 295                 return 1;
 296         etype = OBJ_dup(oid);
 297         if (!etype)
 298                 return 0;
 299         ASN1_OBJECT_free(*petype);
 300         *petype = etype;
 301         return 1;
 302         }
 303
 304 int CMS_is_detached(CMS_ContentInfo *cms)
 305         {
 306         ASN1_OCTET_STRING **pos;
 307         pos = CMS_get0_content(cms);
 308         if (!pos)
 309                 return -1;
 310         if (*pos)
 311                 return 0;
 312         return 1;
 313         }
 314
 315 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
 316         {
 317         ASN1_OCTET_STRING **pos;
 318         pos = CMS_get0_content(cms);
 319         if (!pos)
 320                 return 0;
 321         if (detached)
 322                 {
 323                 if (*pos)
 324                         {
 325                         ASN1_OCTET_STRING_free(*pos);
 326                         *pos = NULL;
 327                         }
 328                 return 1;
 329                 }
 330         if (!*pos)
 331                 *pos = ASN1_OCTET_STRING_new();
 332         if (*pos)
 333                 {
 334                 /* NB: special flag to show content is created and not
 335                  * read in.
 336                  */
 337                 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
 338                 return 1;
 339                 }
 340         CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
 341         return 0;
 342         }
 343
 344 /* Create a digest BIO from an X509_ALGOR structure */
 345
 346 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
 347         {
 348         BIO *mdbio = NULL;
 349         ASN1_OBJECT *digestoid;
 350         const EVP_MD *digest;
 351         X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
 352         digest = EVP_get_digestbyobj(digestoid);
 353         if (!digest)
 354                 {
 355                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 356                                 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
 357                 goto err;
 358                 }
 359         mdbio = BIO_new(BIO_f_md());
 360         if (!mdbio || !BIO_set_md(mdbio, digest))
 361                 {
 362                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 363                                 CMS_R_MD_BIO_INIT_ERROR);
 364                 goto err;
 365                 }
 366         return mdbio;
 367         err:
 368         if (mdbio)
 369                 BIO_free(mdbio);
 370         return NULL;
 371         }
 372
 373 /* Locate a message digest content from a BIO chain based on SignerInfo */
 374
 375 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
 376                                         X509_ALGOR *mdalg)
 377         {
 378         int nid;
 379         ASN1_OBJECT *mdoid;
 380         X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
 381         nid = OBJ_obj2nid(mdoid);
 382         /* Look for digest type to match signature */
 383         for (;;)
 384                 {
 385                 EVP_MD_CTX *mtmp;
 386                 chain = BIO_find_type(chain, BIO_TYPE_MD);
 387                 if (chain == NULL)
 388                         {
 389                         CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
 390                                                 CMS_R_NO_MATCHING_DIGEST);
 391                         return 0;
 392                         }
 393                 BIO_get_md_ctx(chain, &mtmp);
 394                 if (EVP_MD_CTX_type(mtmp) == nid
 395                 /* Workaround for broken implementations that use signature
 396                  * algorithm  OID instead of digest.
 397                  */
 398                         || EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid)
 399                         return EVP_MD_CTX_copy_ex(mctx, mtmp);
 400                 chain = BIO_next(chain);
 401                 }
 402         }
 403
 404 static STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
 405         {
 406         switch (OBJ_obj2nid(cms->contentType))
 407                 {
 408
 409                 case NID_pkcs7_signed:
 410                 return &cms->d.signedData->certificates;
 411
 412                 case NID_pkcs7_enveloped:
 413                 return &cms->d.envelopedData->originatorInfo->certificates;
 414
 415                 default:
 416                 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
 417                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 418                 return NULL;
 419
 420                 }
 421         }
 422
 423 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
 424         {
 425         STACK_OF(CMS_CertificateChoices) **pcerts;
 426         CMS_CertificateChoices *cch;
 427         pcerts = cms_get0_certificate_choices(cms);
 428         if (!pcerts)
 429                 return NULL;
 430         if (!*pcerts)
 431                 *pcerts = sk_CMS_CertificateChoices_new_null();
 432         if (!*pcerts)
 433                 return NULL;
 434         cch = M_ASN1_new_of(CMS_CertificateChoices);
 435         if (!cch)
 436                 return NULL;
 437         if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
 438                 {
 439                 M_ASN1_free_of(cch, CMS_CertificateChoices);
 440                 return NULL;
 441                 }
 442         return cch;
 443         }
 444
 445 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
 446         {
 447         CMS_CertificateChoices *cch;
 448         STACK_OF(CMS_CertificateChoices) **pcerts;
 449         int i;
 450         pcerts = cms_get0_certificate_choices(cms);
 451         if (!pcerts)
 452                 return 0;
 453         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 454                 {
 455                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 456                 if (cch->type == CMS_CERTCHOICE_CERT)
 457                         {
 458                         if (!X509_cmp(cch->d.certificate, cert))
 459                                 {
 460                                 CMSerr(CMS_F_CMS_ADD0_CERT,
 461                                         CMS_R_CERTIFICATE_ALREADY_PRESENT);
 462                                 return 0;
 463                                 }
 464                         }
 465                 }
 466         cch = CMS_add0_CertificateChoices(cms);
 467         if (!cch)
 468                 return 0;
 469         cch->type = CMS_CERTCHOICE_CERT;
 470         cch->d.certificate = cert;
 471         return 1;
 472         }
 473
 474 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
 475         {
 476         int r;
 477         r = CMS_add0_cert(cms, cert);
 478         if (r > 0)
 479                 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
 480         return r;
 481         }
 482
 483 static STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
 484         {
 485         switch (OBJ_obj2nid(cms->contentType))
 486                 {
 487
 488                 case NID_pkcs7_signed:
 489                 return &cms->d.signedData->crls;
 490
 491                 case NID_pkcs7_enveloped:
 492                 return &cms->d.envelopedData->originatorInfo->crls;
 493
 494                 default:
 495                 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
 496                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 497                 return NULL;
 498
 499                 }
 500         }
 501
 502 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
 503         {
 504         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 505         CMS_RevocationInfoChoice *rch;
 506         pcrls = cms_get0_revocation_choices(cms);
 507         if (!pcrls)
 508                 return NULL;
 509         if (!*pcrls)
 510                 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
 511         if (!*pcrls)
 512                 return NULL;
 513         rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
 514         if (!rch)
 515                 return NULL;
 516         if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
 517                 {
 518                 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
 519                 return NULL;
 520                 }
 521         return rch;
 522         }
 523
 524 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 525         {
 526         CMS_RevocationInfoChoice *rch;
 527         rch = CMS_add0_RevocationInfoChoice(cms);
 528         if (!rch)
 529                 return 0;
 530         rch->type = CMS_REVCHOICE_CRL;
 531         rch->d.crl = crl;
 532         return 1;
 533         }
 534
 535 int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 536         {
 537         int r;
 538         r = CMS_add0_crl(cms, crl);
 539         if (r > 0)
 540                 CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
 541         return r;
 542         }
 543
 544 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
 545         {
 546         STACK_OF(X509) *certs = NULL;
 547         CMS_CertificateChoices *cch;
 548         STACK_OF(CMS_CertificateChoices) **pcerts;
 549         int i;
 550         pcerts = cms_get0_certificate_choices(cms);
 551         if (!pcerts)
 552                 return NULL;
 553         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 554                 {
 555                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 556                 if (cch->type == 0)
 557                         {
 558                         if (!certs)
 559                                 {
 560                                 certs = sk_X509_new_null();
 561                                 if (!certs)
 562                                         return NULL;
 563                                 }
 564                         if (!sk_X509_push(certs, cch->d.certificate))
 565                                 {
 566                                 sk_X509_pop_free(certs, X509_free);
 567                                 return NULL;
 568                                 }
 569                         CRYPTO_add(&cch->d.certificate->references,
 570                                                 1, CRYPTO_LOCK_X509);
 571                         }
 572                 }
 573         return certs;
 574
 575         }
 576
 577 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
 578         {
 579         STACK_OF(X509_CRL) *crls = NULL;
 580         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 581         CMS_RevocationInfoChoice *rch;
 582         int i;
 583         pcrls = cms_get0_revocation_choices(cms);
 584         if (!pcrls)
 585                 return NULL;
 586         for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
 587                 {
 588                 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
 589                 if (rch->type == 0)
 590                         {
 591                         if (!crls)
 592                                 {
 593                                 crls = sk_X509_CRL_new_null();
 594                                 if (!crls)
 595                                         return NULL;
 596                                 }
 597                         if (!sk_X509_CRL_push(crls, rch->d.crl))
 598                                 {
 599                                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 600                                 return NULL;
 601                                 }
 602                         CRYPTO_add(&rch->d.crl->references,
 603                                                 1, CRYPTO_LOCK_X509_CRL);
 604                         }
 605                 }
 606         return crls;
 607         }
 608
 609 int cms_ias_cert_cmp(CMS_IssuerAndSerialNumber *ias, X509 *cert)
 610         {
 611         int ret;
 612         ret = X509_NAME_cmp(ias->issuer, X509_get_issuer_name(cert));
 613         if (ret)
 614                 return ret;
 615         return ASN1_INTEGER_cmp(ias->serialNumber, X509_get_serialNumber(cert));
 616         }
 617
 618 int cms_keyid_cert_cmp(ASN1_OCTET_STRING *keyid, X509 *cert)
 619         {
 620         X509_check_purpose(cert, -1, -1);
 621         if (!cert->skid)
 622                 return -1;
 623         return ASN1_OCTET_STRING_cmp(keyid, cert->skid);
 624         }
 625
 626 int cms_set1_ias(CMS_IssuerAndSerialNumber **pias, X509 *cert)
 627         {
 628         CMS_IssuerAndSerialNumber *ias;
 629         ias = M_ASN1_new_of(CMS_IssuerAndSerialNumber);
 630         if (!ias)
 631                 goto err;
 632         if (!X509_NAME_set(&ias->issuer, X509_get_issuer_name(cert)))
 633                 goto err;
 634         if (!ASN1_STRING_copy(ias->serialNumber, X509_get_serialNumber(cert)))
 635                 goto err;
 636         if (*pias)
 637                 M_ASN1_free_of(*pias, CMS_IssuerAndSerialNumber);
 638         *pias = ias;
 639         return 1;
 640         err:
 641         if (ias)
 642                 M_ASN1_free_of(ias, CMS_IssuerAndSerialNumber);
 643         CMSerr(CMS_F_CMS_SET1_IAS, ERR_R_MALLOC_FAILURE);
 644         return 0;
 645         }
 646
 647 int cms_set1_keyid(ASN1_OCTET_STRING **pkeyid, X509 *cert)
 648         {
 649         ASN1_OCTET_STRING *keyid = NULL;
 650         X509_check_purpose(cert, -1, -1);
 651         if (!cert->skid)
 652                 {
 653                 CMSerr(CMS_F_CMS_SET1_KEYID, CMS_R_CERTIFICATE_HAS_NO_KEYID);
 654                 return 0;
 655                 }
 656         keyid = ASN1_STRING_dup(cert->skid);
 657         if (!keyid)
 658                 {
 659                 CMSerr(CMS_F_CMS_SET1_KEYID, ERR_R_MALLOC_FAILURE);
 660                 return 0;
 661                 }
 662         if (*pkeyid)
 663                 ASN1_OCTET_STRING_free(*pkeyid);
 664         *pkeyid = keyid;
 665         return 1;
 666         }