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                 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_encrypted:
 188                 case NID_id_smime_ct_compressedData:
 189                 /* Nothing to do */
 190                 return 1;
 191
 192                 case NID_pkcs7_signed:
 193                 return cms_SignedData_final(cms, cmsbio);
 194
 195                 case NID_pkcs7_digest:
 196                 return cms_DigestedData_do_final(cms, cmsbio, 0);
 197
 198                 default:
 199                 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
 200                 return 0;
 201                 }
 202         }
 203
 204 /* Return an OCTET STRING pointer to content. This allows it to
 205  * be accessed or set later.
 206  */
 207
 208 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
 209         {
 210         switch (OBJ_obj2nid(cms->contentType))
 211                 {
 212
 213                 case NID_pkcs7_data:
 214                 return &cms->d.data;
 215
 216                 case NID_pkcs7_signed:
 217                 return &cms->d.signedData->encapContentInfo->eContent;
 218
 219                 case NID_pkcs7_enveloped:
 220                 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
 221
 222                 case NID_pkcs7_digest:
 223                 return &cms->d.digestedData->encapContentInfo->eContent;
 224
 225                 case NID_pkcs7_encrypted:
 226                 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
 227
 228                 case NID_id_smime_ct_authData:
 229                 return &cms->d.authenticatedData->encapContentInfo->eContent;
 230
 231                 case NID_id_smime_ct_compressedData:
 232                 return &cms->d.compressedData->encapContentInfo->eContent;
 233
 234                 default:
 235                 if (cms->d.other->type == V_ASN1_OCTET_STRING)
 236                         return &cms->d.other->value.octet_string;
 237                 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 238                 return NULL;
 239
 240                 }
 241         }
 242
 243 /* Return an ASN1_OBJECT pointer to content type. This allows it to
 244  * be accessed or set later.
 245  */
 246
 247 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
 248         {
 249         switch (OBJ_obj2nid(cms->contentType))
 250                 {
 251
 252                 case NID_pkcs7_signed:
 253                 return &cms->d.signedData->encapContentInfo->eContentType;
 254
 255                 case NID_pkcs7_enveloped:
 256                 return &cms->d.envelopedData->encryptedContentInfo->contentType;
 257
 258                 case NID_pkcs7_digest:
 259                 return &cms->d.digestedData->encapContentInfo->eContentType;
 260
 261                 case NID_pkcs7_encrypted:
 262                 return &cms->d.encryptedData->encryptedContentInfo->contentType;
 263
 264                 case NID_id_smime_ct_authData:
 265                 return &cms->d.authenticatedData->encapContentInfo->eContentType;
 266
 267                 case NID_id_smime_ct_compressedData:
 268                 return &cms->d.compressedData->encapContentInfo->eContentType;
 269
 270                 default:
 271                 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
 272                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 273                 return NULL;
 274
 275                 }
 276         }
 277
 278 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
 279         {
 280         ASN1_OBJECT **petype;
 281         petype = cms_get0_econtent_type(cms);
 282         if (petype)
 283                 return *petype;
 284         return NULL;
 285         }
 286
 287 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
 288         {
 289         ASN1_OBJECT **petype, *etype;
 290         petype = cms_get0_econtent_type(cms);
 291         if (!petype)
 292                 return 0;
 293         if (!oid)
 294                 return 1;
 295         etype = OBJ_dup(oid);
 296         if (!etype)
 297                 return 0;
 298         ASN1_OBJECT_free(*petype);
 299         *petype = etype;
 300         return 1;
 301         }
 302
 303 int CMS_is_detached(CMS_ContentInfo *cms)
 304         {
 305         ASN1_OCTET_STRING **pos;
 306         pos = CMS_get0_content(cms);
 307         if (!pos)
 308                 return -1;
 309         if (*pos)
 310                 return 0;
 311         return 1;
 312         }
 313
 314 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
 315         {
 316         ASN1_OCTET_STRING **pos;
 317         pos = CMS_get0_content(cms);
 318         if (!pos)
 319                 return 0;
 320         if (detached)
 321                 {
 322                 if (*pos)
 323                         {
 324                         ASN1_OCTET_STRING_free(*pos);
 325                         *pos = NULL;
 326                         }
 327                 return 1;
 328                 }
 329         if (!*pos)
 330                 *pos = ASN1_OCTET_STRING_new();
 331         if (*pos)
 332                 {
 333                 /* NB: special flag to show content is created and not
 334                  * read in.
 335                  */
 336                 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
 337                 return 1;
 338                 }
 339         CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
 340         return 0;
 341         }
 342
 343 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
 344
 345 void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
 346         {
 347         int param_type;
 348
 349         if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
 350                 param_type = V_ASN1_UNDEF;
 351         else
 352                 param_type = V_ASN1_NULL;
 353
 354         X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
 355
 356         }
 357
 358 /* Create a digest BIO from an X509_ALGOR structure */
 359
 360 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
 361         {
 362         BIO *mdbio = NULL;
 363         ASN1_OBJECT *digestoid;
 364         const EVP_MD *digest;
 365         X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
 366         digest = EVP_get_digestbyobj(digestoid);
 367         if (!digest)
 368                 {
 369                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 370                                 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
 371                 goto err;
 372                 }
 373         mdbio = BIO_new(BIO_f_md());
 374         if (!mdbio || !BIO_set_md(mdbio, digest))
 375                 {
 376                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 377                                 CMS_R_MD_BIO_INIT_ERROR);
 378                 goto err;
 379                 }
 380         return mdbio;
 381         err:
 382         if (mdbio)
 383                 BIO_free(mdbio);
 384         return NULL;
 385         }
 386
 387 /* Locate a message digest content from a BIO chain based on SignerInfo */
 388
 389 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
 390                                         X509_ALGOR *mdalg)
 391         {
 392         int nid;
 393         ASN1_OBJECT *mdoid;
 394         X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
 395         nid = OBJ_obj2nid(mdoid);
 396         /* Look for digest type to match signature */
 397         for (;;)
 398                 {
 399                 EVP_MD_CTX *mtmp;
 400                 chain = BIO_find_type(chain, BIO_TYPE_MD);
 401                 if (chain == NULL)
 402                         {
 403                         CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
 404                                                 CMS_R_NO_MATCHING_DIGEST);
 405                         return 0;
 406                         }
 407                 BIO_get_md_ctx(chain, &mtmp);
 408                 if (EVP_MD_CTX_type(mtmp) == nid)
 409                         {
 410                         EVP_MD_CTX_copy_ex(mctx, mtmp);
 411                         return 1;
 412                         }
 413                 chain = BIO_next(chain);
 414                 }
 415         }
 416
 417 STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
 418         {
 419         switch (OBJ_obj2nid(cms->contentType))
 420                 {
 421
 422                 case NID_pkcs7_signed:
 423                 return &cms->d.signedData->certificates;
 424
 425                 case NID_pkcs7_enveloped:
 426                 return &cms->d.envelopedData->originatorInfo->certificates;
 427
 428                 default:
 429                 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
 430                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 431                 return NULL;
 432
 433                 }
 434         }
 435
 436 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
 437         {
 438         STACK_OF(CMS_CertificateChoices) **pcerts;
 439         CMS_CertificateChoices *cch;
 440         pcerts = cms_get0_certificate_choices(cms);
 441         if (!pcerts)
 442                 return NULL;
 443         if (!*pcerts)
 444                 *pcerts = sk_CMS_CertificateChoices_new_null();
 445         if (!*pcerts)
 446                 return NULL;
 447         cch = M_ASN1_new_of(CMS_CertificateChoices);
 448         if (!cch)
 449                 return NULL;
 450         if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
 451                 {
 452                 M_ASN1_free_of(cch, CMS_CertificateChoices);
 453                 return NULL;
 454                 }
 455         return cch;
 456         }
 457
 458 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
 459         {
 460         CMS_CertificateChoices *cch;
 461         STACK_OF(CMS_CertificateChoices) **pcerts;
 462         int i;
 463         pcerts = cms_get0_certificate_choices(cms);
 464         if (!pcerts)
 465                 return 0;
 466         if (!pcerts)
 467                 return 0;
 468         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 469                 {
 470                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 471                 if (cch->type == CMS_CERTCHOICE_CERT)
 472                         {
 473                         if (!X509_cmp(cch->d.certificate, cert))
 474                                 return -1;
 475
 476                         }
 477                 }
 478         cch = CMS_add0_CertificateChoices(cms);
 479         if (!cch)
 480                 return 0;
 481         cch->type = CMS_CERTCHOICE_CERT;
 482         cch->d.certificate = cert;
 483         return 1;
 484         }
 485
 486 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
 487         {
 488         int r;
 489         r = CMS_add0_cert(cms, cert);
 490         if (r > 0)
 491                 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
 492         return r;
 493         }
 494
 495 STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
 496         {
 497         switch (OBJ_obj2nid(cms->contentType))
 498                 {
 499
 500                 case NID_pkcs7_signed:
 501                 return &cms->d.signedData->crls;
 502
 503                 case NID_pkcs7_enveloped:
 504                 return &cms->d.envelopedData->originatorInfo->crls;
 505
 506                 default:
 507                 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
 508                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 509                 return NULL;
 510
 511                 }
 512         }
 513
 514 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
 515         {
 516         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 517         CMS_RevocationInfoChoice *rch;
 518         pcrls = cms_get0_revocation_choices(cms);
 519         if (!pcrls)
 520                 return NULL;
 521         if (!*pcrls)
 522                 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
 523         if (!*pcrls)
 524                 return NULL;
 525         rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
 526         if (!rch)
 527                 return NULL;
 528         if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
 529                 {
 530                 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
 531                 return NULL;
 532                 }
 533         return rch;
 534         }
 535
 536 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 537         {
 538         CMS_RevocationInfoChoice *rch;
 539         rch = CMS_add0_RevocationInfoChoice(cms);
 540         if (!rch)
 541                 return 0;
 542         rch->type = CMS_REVCHOICE_CRL;
 543         rch->d.crl = crl;
 544         return 1;
 545         }
 546
 547 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
 548         {
 549         STACK_OF(X509) *certs = NULL;
 550         CMS_CertificateChoices *cch;
 551         STACK_OF(CMS_CertificateChoices) **pcerts;
 552         int i;
 553         pcerts = cms_get0_certificate_choices(cms);
 554         if (!pcerts)
 555                 return NULL;
 556         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 557                 {
 558                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 559                 if (cch->type == 0)
 560                         {
 561                         if (!certs)
 562                                 {
 563                                 certs = sk_X509_new_null();
 564                                 if (!certs)
 565                                         return NULL;
 566                                 }
 567                         if (!sk_X509_push(certs, cch->d.certificate))
 568                                 {
 569                                 sk_X509_pop_free(certs, X509_free);
 570                                 return NULL;
 571                                 }
 572                         CRYPTO_add(&cch->d.certificate->references,
 573                                                 1, CRYPTO_LOCK_X509);
 574                         }
 575                 }
 576         return certs;
 577
 578         }
 579
 580 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
 581         {
 582         STACK_OF(X509_CRL) *crls = NULL;
 583         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 584         CMS_RevocationInfoChoice *rch;
 585         int i;
 586         pcrls = cms_get0_revocation_choices(cms);
 587         if (!pcrls)
 588                 return NULL;
 589         for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
 590                 {
 591                 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
 592                 if (rch->type == 0)
 593                         {
 594                         if (!crls)
 595                                 {
 596                                 crls = sk_X509_CRL_new_null();
 597                                 if (!crls)
 598                                         return NULL;
 599                                 }
 600                         if (!sk_X509_CRL_push(crls, rch->d.crl))
 601                                 {
 602                                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 603                                 return NULL;
 604                                 }
 605                         CRYPTO_add(&rch->d.crl->references,
 606                                                 1, CRYPTO_LOCK_X509_CRL);
 607                         }
 608                 }
 609         return crls;
 610         }