crypto/openssl/crypto/cms/cms_smime.c

   1 /* crypto/cms/cms_smime.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 "cryptlib.h"
  55 #include <openssl/asn1t.h>
  56 #include <openssl/x509.h>
  57 #include <openssl/x509v3.h>
  58 #include <openssl/err.h>
  59 #include <openssl/cms.h>
  60 #include "cms_lcl.h"
  61
  62 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
  63         {
  64         unsigned char buf[4096];
  65         int r = 0, i;
  66         BIO *tmpout = NULL;
  67
  68         if (out == NULL)
  69                 tmpout = BIO_new(BIO_s_null());
  70         else if (flags & CMS_TEXT)
  71                 tmpout = BIO_new(BIO_s_mem());
  72         else
  73                 tmpout = out;
  74
  75         if(!tmpout)
  76                 {
  77                 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
  78                 goto err;
  79                 }
  80
  81         /* Read all content through chain to process digest, decrypt etc */
  82         for (;;)
  83         {
  84                 i=BIO_read(in,buf,sizeof(buf));
  85                 if (i <= 0)
  86                         {
  87                         if (BIO_method_type(in) == BIO_TYPE_CIPHER)
  88                                 {
  89                                 if (!BIO_get_cipher_status(in))
  90                                         goto err;
  91                                 }
  92                         if (i < 0)
  93                                 goto err;
  94                         break;
  95                         }
  96
  97                 if (tmpout && (BIO_write(tmpout, buf, i) != i))
  98                         goto err;
  99         }
 100
 101         if(flags & CMS_TEXT)
 102                 {
 103                 if(!SMIME_text(tmpout, out))
 104                         {
 105                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
 106                         goto err;
 107                         }
 108                 }
 109
 110         r = 1;
 111
 112         err:
 113         if (tmpout && (tmpout != out))
 114                 BIO_free(tmpout);
 115         return r;
 116
 117         }
 118
 119 static int check_content(CMS_ContentInfo *cms)
 120         {
 121         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 122         if (!pos || !*pos)
 123                 {
 124                 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
 125                 return 0;
 126                 }
 127         return 1;
 128         }
 129
 130 static void do_free_upto(BIO *f, BIO *upto)
 131         {
 132         if (upto)
 133                 {
 134                 BIO *tbio;
 135                 do
 136                         {
 137                         tbio = BIO_pop(f);
 138                         BIO_free(f);
 139                         f = tbio;
 140                         }
 141                 while (f != upto);
 142                 }
 143         else
 144                 BIO_free_all(f);
 145         }
 146
 147 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
 148         {
 149         BIO *cont;
 150         int r;
 151         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
 152                 {
 153                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
 154                 return 0;
 155                 }
 156         cont = CMS_dataInit(cms, NULL);
 157         if (!cont)
 158                 return 0;
 159         r = cms_copy_content(out, cont, flags);
 160         BIO_free_all(cont);
 161         return r;
 162         }
 163
 164 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
 165         {
 166         CMS_ContentInfo *cms;
 167         cms = cms_Data_create();
 168         if (!cms)
 169                 return NULL;
 170
 171         if (CMS_final(cms, in, NULL, flags))
 172                 return cms;
 173
 174         CMS_ContentInfo_free(cms);
 175
 176         return NULL;
 177         }
 178
 179 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 180                                                         unsigned int flags)
 181         {
 182         BIO *cont;
 183         int r;
 184         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
 185                 {
 186                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
 187                 return 0;
 188                 }
 189
 190         if (!dcont && !check_content(cms))
 191                 return 0;
 192
 193         cont = CMS_dataInit(cms, dcont);
 194         if (!cont)
 195                 return 0;
 196         r = cms_copy_content(out, cont, flags);
 197         if (r)
 198                 r = cms_DigestedData_do_final(cms, cont, 1);
 199         do_free_upto(cont, dcont);
 200         return r;
 201         }
 202
 203 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
 204                                         unsigned int flags)
 205         {
 206         CMS_ContentInfo *cms;
 207         if (!md)
 208                 md = EVP_sha1();
 209         cms = cms_DigestedData_create(md);
 210         if (!cms)
 211                 return NULL;
 212
 213         if(!(flags & CMS_DETACHED))
 214                 {
 215                 flags &= ~CMS_STREAM;
 216                 CMS_set_detached(cms, 0);
 217                 }
 218
 219         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 220                 return cms;
 221
 222         CMS_ContentInfo_free(cms);
 223         return NULL;
 224         }
 225
 226 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
 227                                 const unsigned char *key, size_t keylen,
 228                                 BIO *dcont, BIO *out, unsigned int flags)
 229         {
 230         BIO *cont;
 231         int r;
 232         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
 233                 {
 234                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
 235                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
 236                 return 0;
 237                 }
 238
 239         if (!dcont && !check_content(cms))
 240                 return 0;
 241
 242         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
 243                 return 0;
 244         cont = CMS_dataInit(cms, dcont);
 245         if (!cont)
 246                 return 0;
 247         r = cms_copy_content(out, cont, flags);
 248         do_free_upto(cont, dcont);
 249         return r;
 250         }
 251
 252 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
 253                                         const unsigned char *key, size_t keylen,
 254                                         unsigned int flags)
 255         {
 256         CMS_ContentInfo *cms;
 257         if (!cipher)
 258                 {
 259                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
 260                 return NULL;
 261                 }
 262         cms = CMS_ContentInfo_new();
 263         if (!cms)
 264                 return NULL;
 265         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
 266                 return NULL;
 267
 268         if(!(flags & CMS_DETACHED))
 269                 {
 270                 flags &= ~CMS_STREAM;
 271                 CMS_set_detached(cms, 0);
 272                 }
 273
 274         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 275                 || CMS_final(cms, in, NULL, flags))
 276                 return cms;
 277
 278         CMS_ContentInfo_free(cms);
 279         return NULL;
 280         }
 281
 282 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
 283                                         X509_STORE *store,
 284                                         STACK_OF(X509) *certs,
 285                                         STACK_OF(X509_CRL) *crls,
 286                                         unsigned int flags)
 287         {
 288         X509_STORE_CTX ctx;
 289         X509 *signer;
 290         int i, j, r = 0;
 291         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 292         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
 293                 {
 294                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 295                                                 CMS_R_STORE_INIT_ERROR);
 296                 goto err;
 297                 }
 298         X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
 299         if (crls)
 300                 X509_STORE_CTX_set0_crls(&ctx, crls);
 301
 302         i = X509_verify_cert(&ctx);
 303         if (i <= 0)
 304                 {
 305                 j = X509_STORE_CTX_get_error(&ctx);
 306                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 307                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
 308                 ERR_add_error_data(2, "Verify error:",
 309                                          X509_verify_cert_error_string(j));
 310                 goto err;
 311                 }
 312         r = 1;
 313         err:
 314         X509_STORE_CTX_cleanup(&ctx);
 315         return r;
 316
 317         }
 318
 319 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
 320                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
 321         {
 322         CMS_SignerInfo *si;
 323         STACK_OF(CMS_SignerInfo) *sinfos;
 324         STACK_OF(X509) *cms_certs = NULL;
 325         STACK_OF(X509_CRL) *crls = NULL;
 326         X509 *signer;
 327         int i, scount = 0, ret = 0;
 328         BIO *cmsbio = NULL, *tmpin = NULL;
 329
 330         if (!dcont && !check_content(cms))
 331                 return 0;
 332
 333         /* Attempt to find all signer certificates */
 334
 335         sinfos = CMS_get0_SignerInfos(cms);
 336
 337         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
 338                 {
 339                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
 340                 goto err;
 341                 }
 342
 343         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 344                 {
 345                 si = sk_CMS_SignerInfo_value(sinfos, i);
 346                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 347                 if (signer)
 348                         scount++;
 349                 }
 350
 351         if (scount != sk_CMS_SignerInfo_num(sinfos))
 352                 scount += CMS_set1_signers_certs(cms, certs, flags);
 353
 354         if (scount != sk_CMS_SignerInfo_num(sinfos))
 355                 {
 356                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
 357                 goto err;
 358                 }
 359
 360         /* Attempt to verify all signers certs */
 361
 362         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
 363                 {
 364                 cms_certs = CMS_get1_certs(cms);
 365                 if (!(flags & CMS_NOCRL))
 366                         crls = CMS_get1_crls(cms);
 367                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 368                         {
 369                         si = sk_CMS_SignerInfo_value(sinfos, i);
 370                         if (!cms_signerinfo_verify_cert(si, store,
 371                                                         cms_certs, crls, flags))
 372                                 goto err;
 373                         }
 374                 }
 375
 376         /* Attempt to verify all SignerInfo signed attribute signatures */
 377
 378         if (!(flags & CMS_NO_ATTR_VERIFY))
 379                 {
 380                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 381                         {
 382                         si = sk_CMS_SignerInfo_value(sinfos, i);
 383                         if (CMS_signed_get_attr_count(si) < 0)
 384                                 continue;
 385                         if (CMS_SignerInfo_verify(si) <= 0)
 386                                 goto err;
 387                         }
 388                 }
 389
 390         /* Performance optimization: if the content is a memory BIO then
 391          * store its contents in a temporary read only memory BIO. This
 392          * avoids potentially large numbers of slow copies of data which will
 393          * occur when reading from a read write memory BIO when signatures
 394          * are calculated.
 395          */
 396
 397         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
 398                 {
 399                 char *ptr;
 400                 long len;
 401                 len = BIO_get_mem_data(dcont, &ptr);
 402                 tmpin = BIO_new_mem_buf(ptr, len);
 403                 if (tmpin == NULL)
 404                         {
 405                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 406                         return 0;
 407                         }
 408                 }
 409         else
 410                 tmpin = dcont;
 411
 412
 413         cmsbio=CMS_dataInit(cms, tmpin);
 414         if (!cmsbio)
 415                 goto err;
 416
 417         if (!cms_copy_content(out, cmsbio, flags))
 418                 goto err;
 419
 420         if (!(flags & CMS_NO_CONTENT_VERIFY))
 421                 {
 422                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 423                         {
 424                         si = sk_CMS_SignerInfo_value(sinfos, i);
 425                         if (!CMS_SignerInfo_verify_content(si, cmsbio))
 426                                 {
 427                                 CMSerr(CMS_F_CMS_VERIFY,
 428                                         CMS_R_CONTENT_VERIFY_ERROR);
 429                                 goto err;
 430                                 }
 431                         }
 432                 }
 433
 434         ret = 1;
 435
 436         err:
 437
 438         if (dcont && (tmpin == dcont))
 439                 do_free_upto(cmsbio, dcont);
 440         else
 441                 BIO_free_all(cmsbio);
 442
 443         if (cms_certs)
 444                 sk_X509_pop_free(cms_certs, X509_free);
 445         if (crls)
 446                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 447
 448         return ret;
 449         }
 450
 451 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 452                         STACK_OF(X509) *certs,
 453                         X509_STORE *store, unsigned int flags)
 454         {
 455         int r;
 456         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 457         if (r <= 0)
 458                 return r;
 459         return cms_Receipt_verify(rcms, ocms);
 460         }
 461
 462 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 463                                                 BIO *data, unsigned int flags)
 464         {
 465         CMS_ContentInfo *cms;
 466         int i;
 467
 468         cms = CMS_ContentInfo_new();
 469         if (!cms || !CMS_SignedData_init(cms))
 470                 goto merr;
 471
 472         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
 473                 {
 474                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 475                 goto err;
 476                 }
 477
 478         for (i = 0; i < sk_X509_num(certs); i++)
 479                 {
 480                 X509 *x = sk_X509_value(certs, i);
 481                 if (!CMS_add1_cert(cms, x))
 482                         goto merr;
 483                 }
 484
 485         if(!(flags & CMS_DETACHED))
 486                 {
 487                 flags &= ~CMS_STREAM;
 488                 CMS_set_detached(cms, 0);
 489                 }
 490
 491         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 492                 || CMS_final(cms, data, NULL, flags))
 493                 return cms;
 494         else
 495                 goto err;
 496
 497         merr:
 498         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 499
 500         err:
 501         if (cms)
 502                 CMS_ContentInfo_free(cms);
 503         return NULL;
 504         }
 505
 506 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 507                                         X509 *signcert, EVP_PKEY *pkey,
 508                                         STACK_OF(X509) *certs,
 509                                         unsigned int flags)
 510         {
 511         CMS_SignerInfo *rct_si;
 512         CMS_ContentInfo *cms = NULL;
 513         ASN1_OCTET_STRING **pos, *os;
 514         BIO *rct_cont = NULL;
 515         int r = 0;
 516
 517         flags &= ~CMS_STREAM;
 518         /* Not really detached but avoids content being allocated */
 519         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
 520         if (!pkey || !signcert)
 521                 {
 522                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 523                 return NULL;
 524                 }
 525
 526         /* Initialize signed data */
 527
 528         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 529         if (!cms)
 530                 goto err;
 531
 532         /* Set inner content type to signed receipt */
 533         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 534                 goto err;
 535
 536         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 537         if (!rct_si)
 538                 {
 539                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 540                 goto err;
 541                 }
 542
 543         os = cms_encode_Receipt(si);
 544
 545         if (!os)
 546                 goto err;
 547
 548         /* Set content to digest */
 549         rct_cont = BIO_new_mem_buf(os->data, os->length);
 550         if (!rct_cont)
 551                 goto err;
 552
 553         /* Add msgSigDigest attribute */
 554
 555         if (!cms_msgSigDigest_add1(rct_si, si))
 556                 goto err;
 557
 558         /* Finalize structure */
 559         if (!CMS_final(cms, rct_cont, NULL, flags))
 560                 goto err;
 561
 562         /* Set embedded content */
 563         pos = CMS_get0_content(cms);
 564         *pos = os;
 565
 566         r = 1;
 567
 568         err:
 569         if (rct_cont)
 570                 BIO_free(rct_cont);
 571         if (r)
 572                 return cms;
 573         CMS_ContentInfo_free(cms);
 574         return NULL;
 575
 576         }
 577
 578 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 579                                 const EVP_CIPHER *cipher, unsigned int flags)
 580         {
 581         CMS_ContentInfo *cms;
 582         int i;
 583         X509 *recip;
 584         cms = CMS_EnvelopedData_create(cipher);
 585         if (!cms)
 586                 goto merr;
 587         for (i = 0; i < sk_X509_num(certs); i++)
 588                 {
 589                 recip = sk_X509_value(certs, i);
 590                 if (!CMS_add1_recipient_cert(cms, recip, flags))
 591                         {
 592                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 593                         goto err;
 594                         }
 595                 }
 596
 597         if(!(flags & CMS_DETACHED))
 598                 {
 599                 flags &= ~CMS_STREAM;
 600                 CMS_set_detached(cms, 0);
 601                 }
 602
 603         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 604                 || CMS_final(cms, data, NULL, flags))
 605                 return cms;
 606         else
 607                 goto err;
 608
 609         merr:
 610         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 611         err:
 612         if (cms)
 613                 CMS_ContentInfo_free(cms);
 614         return NULL;
 615         }
 616
 617 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 618         {
 619         STACK_OF(CMS_RecipientInfo) *ris;
 620         CMS_RecipientInfo *ri;
 621         int i, r;
 622         ris = CMS_get0_RecipientInfos(cms);
 623         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 624                 {
 625                 ri = sk_CMS_RecipientInfo_value(ris, i);
 626                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
 627                                 continue;
 628                 /* If we have a cert try matching RecipientInfo
 629                  * otherwise try them all.
 630                  */
 631                 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
 632                         {
 633                         CMS_RecipientInfo_set0_pkey(ri, pk);
 634                         r = CMS_RecipientInfo_decrypt(cms, ri);
 635                         CMS_RecipientInfo_set0_pkey(ri, NULL);
 636                         if (r > 0)
 637                                 return 1;
 638                         if (cert)
 639                                 {
 640                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 641                                                 CMS_R_DECRYPT_ERROR);
 642                                 return 0;
 643                                 }
 644                         ERR_clear_error();
 645                         }
 646                 }
 647
 648         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 649         return 0;
 650
 651         }
 652
 653 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 654                                 unsigned char *key, size_t keylen,
 655                                 unsigned char *id, size_t idlen)
 656         {
 657         STACK_OF(CMS_RecipientInfo) *ris;
 658         CMS_RecipientInfo *ri;
 659         int i, r;
 660         ris = CMS_get0_RecipientInfos(cms);
 661         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 662                 {
 663                 ri = sk_CMS_RecipientInfo_value(ris, i);
 664                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 665                                 continue;
 666
 667                 /* If we have an id try matching RecipientInfo
 668                  * otherwise try them all.
 669                  */
 670                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
 671                         {
 672                         CMS_RecipientInfo_set0_key(ri, key, keylen);
 673                         r = CMS_RecipientInfo_decrypt(cms, ri);
 674                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
 675                         if (r > 0)
 676                                 return 1;
 677                         if (id)
 678                                 {
 679                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
 680                                                 CMS_R_DECRYPT_ERROR);
 681                                 return 0;
 682                                 }
 683                         ERR_clear_error();
 684                         }
 685                 }
 686
 687         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 688         return 0;
 689
 690         }
 691
 692 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 693                                 BIO *dcont, BIO *out,
 694                                 unsigned int flags)
 695         {
 696         int r;
 697         BIO *cont;
 698         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
 699                 {
 700                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 701                 return 0;
 702                 }
 703         if (!dcont && !check_content(cms))
 704                 return 0;
 705         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 706                 return 0;
 707
 708         cont = CMS_dataInit(cms, dcont);
 709         if (!cont)
 710                 return 0;
 711         r = cms_copy_content(out, cont, flags);
 712         do_free_upto(cont, dcont);
 713         return r;
 714         }
 715
 716 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
 717         {
 718         BIO *cmsbio;
 719         int ret = 0;
 720         if (!(cmsbio = CMS_dataInit(cms, dcont)))
 721                 {
 722                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
 723                 return 0;
 724                 }
 725
 726         SMIME_crlf_copy(data, cmsbio, flags);
 727
 728         (void)BIO_flush(cmsbio);
 729
 730
 731         if (!CMS_dataFinal(cms, cmsbio))
 732                 {
 733                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
 734                 goto err;
 735                 }
 736
 737         ret = 1;
 738
 739         err:
 740         do_free_upto(cmsbio, dcont);
 741
 742         return ret;
 743
 744         }
 745
 746 #ifdef ZLIB
 747
 748 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 749                                                         unsigned int flags)
 750         {
 751         BIO *cont;
 752         int r;
 753         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
 754                 {
 755                 CMSerr(CMS_F_CMS_UNCOMPRESS,
 756                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
 757                 return 0;
 758                 }
 759
 760         if (!dcont && !check_content(cms))
 761                 return 0;
 762
 763         cont = CMS_dataInit(cms, dcont);
 764         if (!cont)
 765                 return 0;
 766         r = cms_copy_content(out, cont, flags);
 767         do_free_upto(cont, dcont);
 768         return r;
 769         }
 770
 771 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 772         {
 773         CMS_ContentInfo *cms;
 774         if (comp_nid <= 0)
 775                 comp_nid = NID_zlib_compression;
 776         cms = cms_CompressedData_create(comp_nid);
 777         if (!cms)
 778                 return NULL;
 779
 780         if(!(flags & CMS_DETACHED))
 781                 {
 782                 flags &= ~CMS_STREAM;
 783                 CMS_set_detached(cms, 0);
 784                 }
 785
 786         if (CMS_final(cms, in, NULL, flags))
 787                 return cms;
 788
 789         CMS_ContentInfo_free(cms);
 790         return NULL;
 791         }
 792
 793 #else
 794
 795 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 796                                                         unsigned int flags)
 797         {
 798         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 799         return 0;
 800         }
 801
 802 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 803         {
 804         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 805         return NULL;
 806         }
 807
 808 #endif