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_pkcs7_encrypted:
 184                 case NID_id_smime_ct_compressedData:
 185                 /* Nothing to do */
 186                 return 1;
 187
 188                 case NID_pkcs7_signed:
 189                 return cms_SignedData_final(cms, cmsbio);
 190
 191                 case NID_pkcs7_digest:
 192                 return cms_DigestedData_do_final(cms, cmsbio, 0);
 193
 194                 default:
 195                 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
 196                 return 0;
 197                 }
 198         }
 199
 200 /* Return an OCTET STRING pointer to content. This allows it to
 201  * be accessed or set later.
 202  */
 203
 204 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
 205         {
 206         switch (OBJ_obj2nid(cms->contentType))
 207                 {
 208
 209                 case NID_pkcs7_data:
 210                 return &cms->d.data;
 211
 212                 case NID_pkcs7_signed:
 213                 return &cms->d.signedData->encapContentInfo->eContent;
 214
 215                 case NID_pkcs7_enveloped:
 216                 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
 217
 218                 case NID_pkcs7_digest:
 219                 return &cms->d.digestedData->encapContentInfo->eContent;
 220
 221                 case NID_pkcs7_encrypted:
 222                 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
 223
 224                 case NID_id_smime_ct_authData:
 225                 return &cms->d.authenticatedData->encapContentInfo->eContent;
 226
 227                 case NID_id_smime_ct_compressedData:
 228                 return &cms->d.compressedData->encapContentInfo->eContent;
 229
 230                 default:
 231                 if (cms->d.other->type == V_ASN1_OCTET_STRING)
 232                         return &cms->d.other->value.octet_string;
 233                 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 234                 return NULL;
 235
 236                 }
 237         }
 238
 239 /* Return an ASN1_OBJECT pointer to content type. This allows it to
 240  * be accessed or set later.
 241  */
 242
 243 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
 244         {
 245         switch (OBJ_obj2nid(cms->contentType))
 246                 {
 247
 248                 case NID_pkcs7_signed:
 249                 return &cms->d.signedData->encapContentInfo->eContentType;
 250
 251                 case NID_pkcs7_enveloped:
 252                 return &cms->d.envelopedData->encryptedContentInfo->contentType;
 253
 254                 case NID_pkcs7_digest:
 255                 return &cms->d.digestedData->encapContentInfo->eContentType;
 256
 257                 case NID_pkcs7_encrypted:
 258                 return &cms->d.encryptedData->encryptedContentInfo->contentType;
 259
 260                 case NID_id_smime_ct_authData:
 261                 return &cms->d.authenticatedData->encapContentInfo->eContentType;
 262
 263                 case NID_id_smime_ct_compressedData:
 264                 return &cms->d.compressedData->encapContentInfo->eContentType;
 265
 266                 default:
 267                 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
 268                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 269                 return NULL;
 270
 271                 }
 272         }
 273
 274 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
 275         {
 276         ASN1_OBJECT **petype;
 277         petype = cms_get0_econtent_type(cms);
 278         if (petype)
 279                 return *petype;
 280         return NULL;
 281         }
 282
 283 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
 284         {
 285         ASN1_OBJECT **petype, *etype;
 286         petype = cms_get0_econtent_type(cms);
 287         if (!petype)
 288                 return 0;
 289         if (!oid)
 290                 return 1;
 291         etype = OBJ_dup(oid);
 292         if (!etype)
 293                 return 0;
 294         ASN1_OBJECT_free(*petype);
 295         *petype = etype;
 296         return 1;
 297         }
 298
 299 int CMS_is_detached(CMS_ContentInfo *cms)
 300         {
 301         ASN1_OCTET_STRING **pos;
 302         pos = CMS_get0_content(cms);
 303         if (!pos)
 304                 return -1;
 305         if (*pos)
 306                 return 0;
 307         return 1;
 308         }
 309
 310 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
 311         {
 312         ASN1_OCTET_STRING **pos;
 313         pos = CMS_get0_content(cms);
 314         if (!pos)
 315                 return 0;
 316         if (detached)
 317                 {
 318                 if (*pos)
 319                         {
 320                         ASN1_OCTET_STRING_free(*pos);
 321                         *pos = NULL;
 322                         }
 323                 return 1;
 324                 }
 325         if (!*pos)
 326                 *pos = ASN1_OCTET_STRING_new();
 327         if (*pos)
 328                 {
 329                 /* NB: special flag to show content is created and not
 330                  * read in.
 331                  */
 332                 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
 333                 return 1;
 334                 }
 335         CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
 336         return 0;
 337         }
 338
 339 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
 340
 341 void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
 342         {
 343         int param_type;
 344
 345         if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
 346                 param_type = V_ASN1_UNDEF;
 347         else
 348                 param_type = V_ASN1_NULL;
 349
 350         X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
 351
 352         }
 353
 354 /* Create a digest BIO from an X509_ALGOR structure */
 355
 356 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
 357         {
 358         BIO *mdbio = NULL;
 359         ASN1_OBJECT *digestoid;
 360         const EVP_MD *digest;
 361         X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
 362         digest = EVP_get_digestbyobj(digestoid);
 363         if (!digest)
 364                 {
 365                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 366                                 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
 367                 goto err;
 368                 }
 369         mdbio = BIO_new(BIO_f_md());
 370         if (!mdbio || !BIO_set_md(mdbio, digest))
 371                 {
 372                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
 373                                 CMS_R_MD_BIO_INIT_ERROR);
 374                 goto err;
 375                 }
 376         return mdbio;
 377         err:
 378         if (mdbio)
 379                 BIO_free(mdbio);
 380         return NULL;
 381         }
 382
 383 /* Locate a message digest content from a BIO chain based on SignerInfo */
 384
 385 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
 386                                         X509_ALGOR *mdalg)
 387         {
 388         int nid;
 389         ASN1_OBJECT *mdoid;
 390         X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
 391         nid = OBJ_obj2nid(mdoid);
 392         /* Look for digest type to match signature */
 393         for (;;)
 394                 {
 395                 EVP_MD_CTX *mtmp;
 396                 chain = BIO_find_type(chain, BIO_TYPE_MD);
 397                 if (chain == NULL)
 398                         {
 399                         CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
 400                                                 CMS_R_NO_MATCHING_DIGEST);
 401                         return 0;
 402                         }
 403                 BIO_get_md_ctx(chain, &mtmp);
 404                 if (EVP_MD_CTX_type(mtmp) == nid)
 405                         {
 406                         EVP_MD_CTX_copy_ex(mctx, mtmp);
 407                         return 1;
 408                         }
 409                 chain = BIO_next(chain);
 410                 }
 411         }
 412
 413 STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
 414         {
 415         switch (OBJ_obj2nid(cms->contentType))
 416                 {
 417
 418                 case NID_pkcs7_signed:
 419                 return &cms->d.signedData->certificates;
 420
 421                 case NID_pkcs7_enveloped:
 422                 return &cms->d.envelopedData->originatorInfo->certificates;
 423
 424                 default:
 425                 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
 426                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 427                 return NULL;
 428
 429                 }
 430         }
 431
 432 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
 433         {
 434         STACK_OF(CMS_CertificateChoices) **pcerts;
 435         CMS_CertificateChoices *cch;
 436         pcerts = cms_get0_certificate_choices(cms);
 437         if (!pcerts)
 438                 return NULL;
 439         if (!*pcerts)
 440                 *pcerts = sk_CMS_CertificateChoices_new_null();
 441         if (!*pcerts)
 442                 return NULL;
 443         cch = M_ASN1_new_of(CMS_CertificateChoices);
 444         if (!cch)
 445                 return NULL;
 446         if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
 447                 {
 448                 M_ASN1_free_of(cch, CMS_CertificateChoices);
 449                 return NULL;
 450                 }
 451         return cch;
 452         }
 453
 454 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
 455         {
 456         CMS_CertificateChoices *cch;
 457         STACK_OF(CMS_CertificateChoices) **pcerts;
 458         int i;
 459         pcerts = cms_get0_certificate_choices(cms);
 460         if (!pcerts)
 461                 return 0;
 462         if (!pcerts)
 463                 return 0;
 464         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 465                 {
 466                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 467                 if (cch->type == CMS_CERTCHOICE_CERT)
 468                         {
 469                         if (!X509_cmp(cch->d.certificate, cert))
 470                                 return -1;
 471
 472                         }
 473                 }
 474         cch = CMS_add0_CertificateChoices(cms);
 475         if (!cch)
 476                 return 0;
 477         cch->type = CMS_CERTCHOICE_CERT;
 478         cch->d.certificate = cert;
 479         return 1;
 480         }
 481
 482 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
 483         {
 484         int r;
 485         r = CMS_add0_cert(cms, cert);
 486         if (r > 0)
 487                 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
 488         return r;
 489         }
 490
 491 STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
 492         {
 493         switch (OBJ_obj2nid(cms->contentType))
 494                 {
 495
 496                 case NID_pkcs7_signed:
 497                 return &cms->d.signedData->crls;
 498
 499                 case NID_pkcs7_enveloped:
 500                 return &cms->d.envelopedData->originatorInfo->crls;
 501
 502                 default:
 503                 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
 504                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
 505                 return NULL;
 506
 507                 }
 508         }
 509
 510 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
 511         {
 512         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 513         CMS_RevocationInfoChoice *rch;
 514         pcrls = cms_get0_revocation_choices(cms);
 515         if (!pcrls)
 516                 return NULL;
 517         if (!*pcrls)
 518                 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
 519         if (!*pcrls)
 520                 return NULL;
 521         rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
 522         if (!rch)
 523                 return NULL;
 524         if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
 525                 {
 526                 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
 527                 return NULL;
 528                 }
 529         return rch;
 530         }
 531
 532 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 533         {
 534         CMS_RevocationInfoChoice *rch;
 535         rch = CMS_add0_RevocationInfoChoice(cms);
 536         if (!rch)
 537                 return 0;
 538         rch->type = CMS_REVCHOICE_CRL;
 539         rch->d.crl = crl;
 540         return 1;
 541         }
 542
 543 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
 544         {
 545         STACK_OF(X509) *certs = NULL;
 546         CMS_CertificateChoices *cch;
 547         STACK_OF(CMS_CertificateChoices) **pcerts;
 548         int i;
 549         pcerts = cms_get0_certificate_choices(cms);
 550         if (!pcerts)
 551                 return NULL;
 552         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
 553                 {
 554                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 555                 if (cch->type == 0)
 556                         {
 557                         if (!certs)
 558                                 {
 559                                 certs = sk_X509_new_null();
 560                                 if (!certs)
 561                                         return NULL;
 562                                 }
 563                         if (!sk_X509_push(certs, cch->d.certificate))
 564                                 {
 565                                 sk_X509_pop_free(certs, X509_free);
 566                                 return NULL;
 567                                 }
 568                         CRYPTO_add(&cch->d.certificate->references,
 569                                                 1, CRYPTO_LOCK_X509);
 570                         }
 571                 }
 572         return certs;
 573
 574         }
 575
 576 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
 577         {
 578         STACK_OF(X509_CRL) *crls = NULL;
 579         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 580         CMS_RevocationInfoChoice *rch;
 581         int i;
 582         pcrls = cms_get0_revocation_choices(cms);
 583         if (!pcrls)
 584                 return NULL;
 585         for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
 586                 {
 587                 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
 588                 if (rch->type == 0)
 589                         {
 590                         if (!crls)
 591                                 {
 592                                 crls = sk_X509_CRL_new_null();
 593                                 if (!crls)
 594                                         return NULL;
 595                                 }
 596                         if (!sk_X509_CRL_push(crls, rch->d.crl))
 597                                 {
 598                                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 599                                 return NULL;
 600                                 }
 601                         CRYPTO_add(&rch->d.crl->references,
 602                                                 1, CRYPTO_LOCK_X509_CRL);
 603                         }
 604                 }
 605         return crls;
 606         }