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/x509.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                 default:
 141                 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
 142                 return NULL;
 143                 }
 144
 145         if (cmsbio)
 146                 return BIO_push(cmsbio, cont);
 147
 148         if (!icont)
 149                 BIO_free(cont);
 150         return NULL;
 151
 152         }
 153
 154 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
 155         {
 156         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 157         if (!pos)
 158                 return 0;
 159         /* If ebmedded content find memory BIO and set content */
 160         if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT))
 161                 {
 162                 BIO *mbio;
 163                 unsigned char *cont;
 164                 long contlen;
 165                 mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
 166                 if (!mbio)
 167                         {
 168                         CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
 169                         return 0;
 170                         }
 171                 contlen = BIO_get_mem_data(mbio, &cont);
 172                 /* Set bio as read only so its content can't be clobbered */
 173                 BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
 174                 BIO_set_mem_eof_return(mbio, 0);
 175                 ASN1_STRING_set0(*pos, cont, contlen);
 176                 (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
 177                 }
 178
 179         switch (OBJ_obj2nid(cms->contentType))
 180                 {
 181
 182                 case NID_pkcs7_data:
 183                 case NID_id_smime_ct_compressedData:
 184                 /* Nothing to do */
 185                 return 1;
 186
 187                 case NID_pkcs7_signed:
 188                 return cms_SignedData_final(cms, cmsbio);
 189
 190                 case NID_pkcs7_digest:
 191                 return cms_DigestedData_do_final(cms, cmsbio, 0);
 192
 193                 default:
 194                 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
 195                 return 0;
 196                 }
 197         }
 198
 199 /* Return an OCTET STRING pointer to content. This allows it to
 200  * be accessed or set later.
 201  */
 202
 203 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
 204         {
 205         switch (OBJ_obj2nid(cms->contentType))
 206                 {
 207
 208                 case NID_pkcs7_data:
 209                 return &cms->d.data;
 210
 211                 case NID_pkcs7_signed:
 212                 return &cms->d.signedData->encapContentInfo->eContent;
 213
 214                 case NID_pkcs7_enveloped:
 215                 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
 216
 217                 case NID_pkcs7_digest:
 218                 return &cms->d.digestedData->encapContentInfo->eContent;
 219
 220                 case NID_pkcs7_encrypted:
 221                 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
 222
 223                 case NID_id_smime_ct_authData:
 224                 return &cms->d.authenticatedData->encapContentInfo->eContent;
 225
 226                 case NID_id_smime_ct_compressedData:
 227                 return &cms->d.compressedData->encapContentInfo->eContent;
 228
 229                 default:
 230                 if (cms->d.other->type == V_ASN1_OCTET_STRING)
 231                         return &cms->d.other->value.octet_string;
 232                 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 233                 return NULL;
 234
 235                 }
 236         }
 237
 238 /* Return an ASN1_OBJECT pointer to content type. This allows it to
 239  * be accessed or set later.
 240  */
 241
 242 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
 243         {
 244         switch (OBJ_obj2nid(cms->contentType))
 245                 {
 246
 247                 case NID_pkcs7_signed:
 248                 return &cms->d.signedData->encapContentInfo->eContentType;
 249
 250                 case NID_pkcs7_enveloped:
 251                 return &cms->d.envelopedData->encryptedContentInfo->contentType;
 252
 253                 case NID_pkcs7_digest:
 254                 return &cms->d.digestedData->encapContentInfo->eContentType;
 255
 256                 case NID_pkcs7_encrypted:
 257                 return &cms->d.encryptedData->encryptedContentInfo->contentType;
 258
 259                 case NID_id_smime_ct_authData:
 260                 return &cms->d.authenticatedData->encapContentInfo->eContentType;
 261
 262                 case NID_id_smime_ct_compressedData:
 263                 return &cms->d.compressedData->encapContentInfo->eContentType;
 264
 265                 default:
 266                 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
 267                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 268                 return NULL;
 269
 270                 }
 271         }
 272
 273 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
 274         {
 275         ASN1_OBJECT **petype;
 276         petype = cms_get0_econtent_type(cms);
 277         if (petype)
 278                 return *petype;
 279         return NULL;
 280         }
 281
 282 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
 283         {
 284         ASN1_OBJECT **petype, *etype;
 285         petype = cms_get0_econtent_type(cms);
 286         if (!petype)
 287                 return 0;
 288         if (!oid)
 289                 return 1;
 290         etype = OBJ_dup(oid);
 291         if (!etype)
 292                 return 0;
 293         ASN1_OBJECT_free(*petype);
 294         *petype = etype;
 295         return 1;
 296         }
 297
 298 int CMS_is_detached(CMS_ContentInfo *cms)
 299         {
 300         ASN1_OCTET_STRING **pos;
 301         pos = CMS_get0_content(cms);
 302         if (!pos)
 303                 return -1;
 304         if (*pos)
 305                 return 0;
 306         return 1;
 307         }
 308
 309 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
 310         {
 311         ASN1_OCTET_STRING **pos;
 312         pos = CMS_get0_content(cms);
 313         if (!pos)
 314                 return 0;
 315         if (detached)
 316                 {
 317                 if (*pos)
 318                         {
 319                         ASN1_OCTET_STRING_free(*pos);
 320                         *pos = NULL;
 321                         }
 322                 return 1;
 323                 }
 324         if (!*pos)
 325                 *pos = ASN1_OCTET_STRING_new();
 326         if (*pos)
 327                 {
 328                 /* NB: special flag to show content is created and not
 329                  * read in.
 330                  */
 331                 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
 332                 return 1;
 333                 }
 334         CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
 335         return 0;
 336         }
 337
 338 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
 339
 340 void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
 341         {
 342         int param_type;
 343
 344         if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
 345                 param_type = V_ASN1_UNDEF;
 346         else
 347                 param_type = V_ASN1_NULL;
 348
 349         X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
 350
 351         }
 352
 353 /* Create a digest BIO from an X509_ALGOR structure */
 354
 355 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
 356         {
 357         BIO *mdbio = NULL;
 358         ASN1_OBJECT *digestoid;
 359         const EVP_MD *digest;
 360         X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
 361         digest = EVP_get_digestbyobj(digestoid);
 362         if (!digest)
 363                 {
 364                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 365                                 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
 366                 goto err;
 367                 }
 368         mdbio = BIO_new(BIO_f_md());
 369         if (!mdbio || !BIO_set_md(mdbio, digest))
 370                 {
 371                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 372                                 CMS_R_MD_BIO_INIT_ERROR);
 373                 goto err;
 374                 }
 375         return mdbio;
 376         err:
 377         if (mdbio)
 378                 BIO_free(mdbio);
 379         return NULL;
 380         }
 381
 382 /* Locate a message digest content from a BIO chain based on SignerInfo */
 383
 384 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
 385                                         X509_ALGOR *mdalg)
 386         {
 387         int nid;
 388         ASN1_OBJECT *mdoid;
 389         X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
 390         nid = OBJ_obj2nid(mdoid);
 391         /* Look for digest type to match signature */
 392         for (;;)
 393                 {
 394                 EVP_MD_CTX *mtmp;
 395                 chain = BIO_find_type(chain, BIO_TYPE_MD);
 396                 if (chain == NULL)
 397                         {
 398                         CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
 399                                                 CMS_R_NO_MATCHING_DIGEST);
 400                         return 0;
 401                         }
 402                 BIO_get_md_ctx(chain, &mtmp);
 403                 if (EVP_MD_CTX_type(mtmp) == nid)
 404                         {
 405                         EVP_MD_CTX_copy_ex(mctx, mtmp);
 406                         return 1;
 407                         }
 408                 chain = BIO_next(chain);
 409                 }
 410         }
 411
 412 STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
 413         {
 414         switch (OBJ_obj2nid(cms->contentType))
 415                 {
 416
 417                 case NID_pkcs7_signed:
 418                 return &cms->d.signedData->certificates;
 419
 420                 case NID_pkcs7_enveloped:
 421                 return &cms->d.envelopedData->originatorInfo->certificates;
 422
 423                 default:
 424                 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
 425                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 426                 return NULL;
 427
 428                 }
 429         }
 430
 431 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
 432         {
 433         STACK_OF(CMS_CertificateChoices) **pcerts;
 434         CMS_CertificateChoices *cch;
 435         pcerts = cms_get0_certificate_choices(cms);
 436         if (!pcerts)
 437                 return NULL;
 438         if (!*pcerts)
 439                 *pcerts = sk_CMS_CertificateChoices_new_null();
 440         if (!*pcerts)
 441                 return NULL;
 442         cch = M_ASN1_new_of(CMS_CertificateChoices);
 443         if (!cch)
 444                 return NULL;
 445         if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
 446                 {
 447                 M_ASN1_free_of(cch, CMS_CertificateChoices);
 448                 return NULL;
 449                 }
 450         return cch;
 451         }
 452
 453 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
 454         {
 455         CMS_CertificateChoices *cch;
 456         STACK_OF(CMS_CertificateChoices) **pcerts;
 457         int i;
 458         pcerts = cms_get0_certificate_choices(cms);
 459         if (!pcerts)
 460                 return 0;
 461         if (!pcerts)
 462                 return 0;
 463         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 464                 {
 465                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 466                 if (cch->type == CMS_CERTCHOICE_CERT)
 467                         {
 468                         if (!X509_cmp(cch->d.certificate, cert))
 469                                 return -1;
 470
 471                         }
 472                 }
 473         cch = CMS_add0_CertificateChoices(cms);
 474         if (!cch)
 475                 return 0;
 476         cch->type = CMS_CERTCHOICE_CERT;
 477         cch->d.certificate = cert;
 478         return 1;
 479         }
 480
 481 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
 482         {
 483         int r;
 484         r = CMS_add0_cert(cms, cert);
 485         if (r > 0)
 486                 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
 487         return r;
 488         }
 489
 490 STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
 491         {
 492         switch (OBJ_obj2nid(cms->contentType))
 493                 {
 494
 495                 case NID_pkcs7_signed:
 496                 return &cms->d.signedData->crls;
 497
 498                 case NID_pkcs7_enveloped:
 499                 return &cms->d.envelopedData->originatorInfo->crls;
 500
 501                 default:
 502                 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
 503                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 504                 return NULL;
 505
 506                 }
 507         }
 508
 509 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
 510         {
 511         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 512         CMS_RevocationInfoChoice *rch;
 513         pcrls = cms_get0_revocation_choices(cms);
 514         if (!pcrls)
 515                 return NULL;
 516         if (!*pcrls)
 517                 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
 518         if (!*pcrls)
 519                 return NULL;
 520         rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
 521         if (!rch)
 522                 return NULL;
 523         if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
 524                 {
 525                 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
 526                 return NULL;
 527                 }
 528         return rch;
 529         }
 530
 531 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 532         {
 533         CMS_RevocationInfoChoice *rch;
 534         rch = CMS_add0_RevocationInfoChoice(cms);
 535         if (!rch)
 536                 return 0;
 537         rch->type = CMS_REVCHOICE_CRL;
 538         rch->d.crl = crl;
 539         return 1;
 540         }
 541
 542 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
 543         {
 544         STACK_OF(X509) *certs = NULL;
 545         CMS_CertificateChoices *cch;
 546         STACK_OF(CMS_CertificateChoices) **pcerts;
 547         int i;
 548         pcerts = cms_get0_certificate_choices(cms);
 549         if (!pcerts)
 550                 return NULL;
 551         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 552                 {
 553                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 554                 if (cch->type == 0)
 555                         {
 556                         if (!certs)
 557                                 {
 558                                 certs = sk_X509_new_null();
 559                                 if (!certs)
 560                                         return NULL;
 561                                 }
 562                         if (!sk_X509_push(certs, cch->d.certificate))
 563                                 {
 564                                 sk_X509_pop_free(certs, X509_free);
 565                                 return NULL;
 566                                 }
 567                         CRYPTO_add(&cch->d.certificate->references,
 568                                                 1, CRYPTO_LOCK_X509);
 569                         }
 570                 }
 571         return certs;
 572
 573         }
 574
 575 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
 576         {
 577         STACK_OF(X509_CRL) *crls = NULL;
 578         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 579         CMS_RevocationInfoChoice *rch;
 580         int i;
 581         pcrls = cms_get0_revocation_choices(cms);
 582         if (!pcrls)
 583                 return NULL;
 584         for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
 585                 {
 586                 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
 587                 if (rch->type == 0)
 588                         {
 589                         if (!crls)
 590                                 {
 591                                 crls = sk_X509_CRL_new_null();
 592                                 if (!crls)
 593                                         return NULL;
 594                                 }
 595                         if (!sk_X509_CRL_push(crls, rch->d.crl))
 596                                 {
 597                                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 598                                 return NULL;
 599                                 }
 600                         CRYPTO_add(&rch->d.crl->references,
 601                                                 1, CRYPTO_LOCK_X509_CRL);
 602                         }
 603                 }
 604         return crls;
 605         }