crypto/openssl-0.9/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                         break;
  93                         }
  94
  95                 if (tmpout)
  96                         BIO_write(tmpout, buf, i);
  97         }
  98
  99         if(flags & CMS_TEXT)
 100                 {
 101                 if(!SMIME_text(tmpout, out))
 102                         {
 103                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
 104                         goto err;
 105                         }
 106                 }
 107
 108         r = 1;
 109
 110         err:
 111         if (tmpout && (tmpout != out))
 112                 BIO_free(tmpout);
 113         return r;
 114
 115         }
 116
 117 static int check_content(CMS_ContentInfo *cms)
 118         {
 119         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 120         if (!pos || !*pos)
 121                 {
 122                 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
 123                 return 0;
 124                 }
 125         return 1;
 126         }
 127
 128 static void do_free_upto(BIO *f, BIO *upto)
 129         {
 130         if (upto)
 131                 {
 132                 BIO *tbio;
 133                 do
 134                         {
 135                         tbio = BIO_pop(f);
 136                         BIO_free(f);
 137                         f = tbio;
 138                         }
 139                 while (f != upto);
 140                 }
 141         else
 142                 BIO_free_all(f);
 143         }
 144
 145 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
 146         {
 147         BIO *cont;
 148         int r;
 149         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
 150                 {
 151                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
 152                 return 0;
 153                 }
 154         cont = CMS_dataInit(cms, NULL);
 155         if (!cont)
 156                 return 0;
 157         r = cms_copy_content(out, cont, flags);
 158         BIO_free_all(cont);
 159         return r;
 160         }
 161
 162 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
 163         {
 164         CMS_ContentInfo *cms;
 165         cms = cms_Data_create();
 166         if (!cms)
 167                 return NULL;
 168
 169         if (CMS_final(cms, in, NULL, flags))
 170                 return cms;
 171
 172         CMS_ContentInfo_free(cms);
 173
 174         return NULL;
 175         }
 176
 177 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 178                                                         unsigned int flags)
 179         {
 180         BIO *cont;
 181         int r;
 182         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
 183                 {
 184                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
 185                 return 0;
 186                 }
 187
 188         if (!dcont && !check_content(cms))
 189                 return 0;
 190
 191         cont = CMS_dataInit(cms, dcont);
 192         if (!cont)
 193                 return 0;
 194         r = cms_copy_content(out, cont, flags);
 195         if (r)
 196                 r = cms_DigestedData_do_final(cms, cont, 1);
 197         do_free_upto(cont, dcont);
 198         return r;
 199         }
 200
 201 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
 202                                         unsigned int flags)
 203         {
 204         CMS_ContentInfo *cms;
 205         if (!md)
 206                 md = EVP_sha1();
 207         cms = cms_DigestedData_create(md);
 208         if (!cms)
 209                 return NULL;
 210
 211         if(!(flags & CMS_DETACHED))
 212                 {
 213                 flags &= ~CMS_STREAM;
 214                 CMS_set_detached(cms, 0);
 215                 }
 216
 217         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 218                 return cms;
 219
 220         CMS_ContentInfo_free(cms);
 221         return NULL;
 222         }
 223
 224 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
 225                                 const unsigned char *key, size_t keylen,
 226                                 BIO *dcont, BIO *out, unsigned int flags)
 227         {
 228         BIO *cont;
 229         int r;
 230         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
 231                 {
 232                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
 233                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
 234                 return 0;
 235                 }
 236
 237         if (!dcont && !check_content(cms))
 238                 return 0;
 239
 240         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
 241                 return 0;
 242         cont = CMS_dataInit(cms, dcont);
 243         if (!cont)
 244                 return 0;
 245         r = cms_copy_content(out, cont, flags);
 246         do_free_upto(cont, dcont);
 247         return r;
 248         }
 249
 250 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
 251                                         const unsigned char *key, size_t keylen,
 252                                         unsigned int flags)
 253         {
 254         CMS_ContentInfo *cms;
 255         if (!cipher)
 256                 {
 257                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
 258                 return NULL;
 259                 }
 260         cms = CMS_ContentInfo_new();
 261         if (!cms)
 262                 return NULL;
 263         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
 264                 return NULL;
 265
 266         if(!(flags & CMS_DETACHED))
 267                 {
 268                 flags &= ~CMS_STREAM;
 269                 CMS_set_detached(cms, 0);
 270                 }
 271
 272         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 273                 || CMS_final(cms, in, NULL, flags))
 274                 return cms;
 275
 276         CMS_ContentInfo_free(cms);
 277         return NULL;
 278         }
 279
 280 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
 281                                         X509_STORE *store,
 282                                         STACK_OF(X509) *certs,
 283                                         STACK_OF(X509_CRL) *crls,
 284                                         unsigned int flags)
 285         {
 286         X509_STORE_CTX ctx;
 287         X509 *signer;
 288         int i, j, r = 0;
 289         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 290         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
 291                 {
 292                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 293                                                 CMS_R_STORE_INIT_ERROR);
 294                 goto err;
 295                 }
 296         X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
 297         if (crls)
 298                 X509_STORE_CTX_set0_crls(&ctx, crls);
 299
 300         i = X509_verify_cert(&ctx);
 301         if (i <= 0)
 302                 {
 303                 j = X509_STORE_CTX_get_error(&ctx);
 304                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 305                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
 306                 ERR_add_error_data(2, "Verify error:",
 307                                          X509_verify_cert_error_string(j));
 308                 goto err;
 309                 }
 310         r = 1;
 311         err:
 312         X509_STORE_CTX_cleanup(&ctx);
 313         return r;
 314
 315         }
 316
 317 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
 318                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
 319         {
 320         CMS_SignerInfo *si;
 321         STACK_OF(CMS_SignerInfo) *sinfos;
 322         STACK_OF(X509) *cms_certs = NULL;
 323         STACK_OF(X509_CRL) *crls = NULL;
 324         X509 *signer;
 325         int i, scount = 0, ret = 0;
 326         BIO *cmsbio = NULL, *tmpin = NULL;
 327
 328         if (!dcont && !check_content(cms))
 329                 return 0;
 330
 331         /* Attempt to find all signer certificates */
 332
 333         sinfos = CMS_get0_SignerInfos(cms);
 334
 335         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
 336                 {
 337                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
 338                 goto err;
 339                 }
 340
 341         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 342                 {
 343                 si = sk_CMS_SignerInfo_value(sinfos, i);
 344                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 345                 if (signer)
 346                         scount++;
 347                 }
 348
 349         if (scount != sk_CMS_SignerInfo_num(sinfos))
 350                 scount += CMS_set1_signers_certs(cms, certs, flags);
 351
 352         if (scount != sk_CMS_SignerInfo_num(sinfos))
 353                 {
 354                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
 355                 goto err;
 356                 }
 357
 358         /* Attempt to verify all signers certs */
 359
 360         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
 361                 {
 362                 cms_certs = CMS_get1_certs(cms);
 363                 if (!(flags & CMS_NOCRL))
 364                         crls = CMS_get1_crls(cms);
 365                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 366                         {
 367                         si = sk_CMS_SignerInfo_value(sinfos, i);
 368                         if (!cms_signerinfo_verify_cert(si, store,
 369                                                         cms_certs, crls, flags))
 370                                 goto err;
 371                         }
 372                 }
 373
 374         /* Attempt to verify all SignerInfo signed attribute signatures */
 375
 376         if (!(flags & CMS_NO_ATTR_VERIFY))
 377                 {
 378                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 379                         {
 380                         si = sk_CMS_SignerInfo_value(sinfos, i);
 381                         if (CMS_signed_get_attr_count(si) < 0)
 382                                 continue;
 383                         if (CMS_SignerInfo_verify(si) <= 0)
 384                                 goto err;
 385                         }
 386                 }
 387
 388         /* Performance optimization: if the content is a memory BIO then
 389          * store its contents in a temporary read only memory BIO. This
 390          * avoids potentially large numbers of slow copies of data which will
 391          * occur when reading from a read write memory BIO when signatures
 392          * are calculated.
 393          */
 394
 395         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
 396                 {
 397                 char *ptr;
 398                 long len;
 399                 len = BIO_get_mem_data(dcont, &ptr);
 400                 tmpin = BIO_new_mem_buf(ptr, len);
 401                 if (tmpin == NULL)
 402                         {
 403                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 404                         return 0;
 405                         }
 406                 }
 407         else
 408                 tmpin = dcont;
 409
 410
 411         cmsbio=CMS_dataInit(cms, tmpin);
 412         if (!cmsbio)
 413                 goto err;
 414
 415         if (!cms_copy_content(out, cmsbio, flags))
 416                 goto err;
 417
 418         if (!(flags & CMS_NO_CONTENT_VERIFY))
 419                 {
 420                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 421                         {
 422                         si = sk_CMS_SignerInfo_value(sinfos, i);
 423                         if (!CMS_SignerInfo_verify_content(si, cmsbio))
 424                                 {
 425                                 CMSerr(CMS_F_CMS_VERIFY,
 426                                         CMS_R_CONTENT_VERIFY_ERROR);
 427                                 goto err;
 428                                 }
 429                         }
 430                 }
 431
 432         ret = 1;
 433
 434         err:
 435
 436         if (dcont && (tmpin == dcont))
 437                 do_free_upto(cmsbio, dcont);
 438         else
 439                 BIO_free_all(cmsbio);
 440
 441         if (cms_certs)
 442                 sk_X509_pop_free(cms_certs, X509_free);
 443         if (crls)
 444                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 445
 446         return ret;
 447         }
 448
 449 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 450                         STACK_OF(X509) *certs,
 451                         X509_STORE *store, unsigned int flags)
 452         {
 453         int r;
 454         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 455         if (r <= 0)
 456                 return r;
 457         return cms_Receipt_verify(rcms, ocms);
 458         }
 459
 460 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 461                                                 BIO *data, unsigned int flags)
 462         {
 463         CMS_ContentInfo *cms;
 464         int i;
 465
 466         cms = CMS_ContentInfo_new();
 467         if (!cms || !CMS_SignedData_init(cms))
 468                 goto merr;
 469
 470         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
 471                 {
 472                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 473                 goto err;
 474                 }
 475
 476         for (i = 0; i < sk_X509_num(certs); i++)
 477                 {
 478                 X509 *x = sk_X509_value(certs, i);
 479                 if (!CMS_add1_cert(cms, x))
 480                         goto merr;
 481                 }
 482
 483         if(!(flags & CMS_DETACHED))
 484                 {
 485                 flags &= ~CMS_STREAM;
 486                 CMS_set_detached(cms, 0);
 487                 }
 488
 489         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 490                 || CMS_final(cms, data, NULL, flags))
 491                 return cms;
 492         else
 493                 goto err;
 494
 495         merr:
 496         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 497
 498         err:
 499         if (cms)
 500                 CMS_ContentInfo_free(cms);
 501         return NULL;
 502         }
 503
 504 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 505                                         X509 *signcert, EVP_PKEY *pkey,
 506                                         STACK_OF(X509) *certs,
 507                                         unsigned int flags)
 508         {
 509         CMS_SignerInfo *rct_si;
 510         CMS_ContentInfo *cms = NULL;
 511         ASN1_OCTET_STRING **pos, *os;
 512         BIO *rct_cont = NULL;
 513         int r = 0;
 514
 515         flags &= ~CMS_STREAM;
 516         /* Not really detached but avoids content being allocated */
 517         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
 518         if (!pkey || !signcert)
 519                 {
 520                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 521                 return NULL;
 522                 }
 523
 524         /* Initialize signed data */
 525
 526         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 527         if (!cms)
 528                 goto err;
 529
 530         /* Set inner content type to signed receipt */
 531         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 532                 goto err;
 533
 534         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 535         if (!rct_si)
 536                 {
 537                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 538                 goto err;
 539                 }
 540
 541         os = cms_encode_Receipt(si);
 542
 543         if (!os)
 544                 goto err;
 545
 546         /* Set content to digest */
 547         rct_cont = BIO_new_mem_buf(os->data, os->length);
 548         if (!rct_cont)
 549                 goto err;
 550
 551         /* Add msgSigDigest attribute */
 552
 553         if (!cms_msgSigDigest_add1(rct_si, si))
 554                 goto err;
 555
 556         /* Finalize structure */
 557         if (!CMS_final(cms, rct_cont, NULL, flags))
 558                 goto err;
 559
 560         /* Set embedded content */
 561         pos = CMS_get0_content(cms);
 562         *pos = os;
 563
 564         r = 1;
 565
 566         err:
 567         if (rct_cont)
 568                 BIO_free(rct_cont);
 569         if (r)
 570                 return cms;
 571         CMS_ContentInfo_free(cms);
 572         return NULL;
 573
 574         }
 575
 576 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 577                                 const EVP_CIPHER *cipher, unsigned int flags)
 578         {
 579         CMS_ContentInfo *cms;
 580         int i;
 581         X509 *recip;
 582         cms = CMS_EnvelopedData_create(cipher);
 583         if (!cms)
 584                 goto merr;
 585         for (i = 0; i < sk_X509_num(certs); i++)
 586                 {
 587                 recip = sk_X509_value(certs, i);
 588                 if (!CMS_add1_recipient_cert(cms, recip, flags))
 589                         {
 590                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 591                         goto err;
 592                         }
 593                 }
 594
 595         if(!(flags & CMS_DETACHED))
 596                 {
 597                 flags &= ~CMS_STREAM;
 598                 CMS_set_detached(cms, 0);
 599                 }
 600
 601         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 602                 || CMS_final(cms, data, NULL, flags))
 603                 return cms;
 604         else
 605                 goto err;
 606
 607         merr:
 608         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 609         err:
 610         if (cms)
 611                 CMS_ContentInfo_free(cms);
 612         return NULL;
 613         }
 614
 615 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 616         {
 617         STACK_OF(CMS_RecipientInfo) *ris;
 618         CMS_RecipientInfo *ri;
 619         int i, r;
 620         ris = CMS_get0_RecipientInfos(cms);
 621         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 622                 {
 623                 ri = sk_CMS_RecipientInfo_value(ris, i);
 624                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
 625                                 continue;
 626                 /* If we have a cert try matching RecipientInfo
 627                  * otherwise try them all.
 628                  */
 629                 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
 630                         {
 631                         CMS_RecipientInfo_set0_pkey(ri, pk);
 632                         r = CMS_RecipientInfo_decrypt(cms, ri);
 633                         CMS_RecipientInfo_set0_pkey(ri, NULL);
 634                         if (r > 0)
 635                                 return 1;
 636                         if (cert)
 637                                 {
 638                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 639                                                 CMS_R_DECRYPT_ERROR);
 640                                 return 0;
 641                                 }
 642                         ERR_clear_error();
 643                         }
 644                 }
 645
 646         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 647         return 0;
 648
 649         }
 650
 651 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 652                                 unsigned char *key, size_t keylen,
 653                                 unsigned char *id, size_t idlen)
 654         {
 655         STACK_OF(CMS_RecipientInfo) *ris;
 656         CMS_RecipientInfo *ri;
 657         int i, r;
 658         ris = CMS_get0_RecipientInfos(cms);
 659         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 660                 {
 661                 ri = sk_CMS_RecipientInfo_value(ris, i);
 662                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 663                                 continue;
 664
 665                 /* If we have an id try matching RecipientInfo
 666                  * otherwise try them all.
 667                  */
 668                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
 669                         {
 670                         CMS_RecipientInfo_set0_key(ri, key, keylen);
 671                         r = CMS_RecipientInfo_decrypt(cms, ri);
 672                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
 673                         if (r > 0)
 674                                 return 1;
 675                         if (id)
 676                                 {
 677                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
 678                                                 CMS_R_DECRYPT_ERROR);
 679                                 return 0;
 680                                 }
 681                         ERR_clear_error();
 682                         }
 683                 }
 684
 685         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 686         return 0;
 687
 688         }
 689
 690 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 691                                 BIO *dcont, BIO *out,
 692                                 unsigned int flags)
 693         {
 694         int r;
 695         BIO *cont;
 696         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
 697                 {
 698                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 699                 return 0;
 700                 }
 701         if (!dcont && !check_content(cms))
 702                 return 0;
 703         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 704                 return 0;
 705
 706         cont = CMS_dataInit(cms, dcont);
 707         if (!cont)
 708                 return 0;
 709         r = cms_copy_content(out, cont, flags);
 710         do_free_upto(cont, dcont);
 711         return r;
 712         }
 713
 714 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
 715         {
 716         BIO *cmsbio;
 717         int ret = 0;
 718         if (!(cmsbio = CMS_dataInit(cms, dcont)))
 719                 {
 720                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
 721                 return 0;
 722                 }
 723
 724         SMIME_crlf_copy(data, cmsbio, flags);
 725
 726         (void)BIO_flush(cmsbio);
 727
 728
 729         if (!CMS_dataFinal(cms, cmsbio))
 730                 {
 731                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
 732                 goto err;
 733                 }
 734
 735         ret = 1;
 736
 737         err:
 738         do_free_upto(cmsbio, dcont);
 739
 740         return ret;
 741
 742         }
 743
 744 #ifdef ZLIB
 745
 746 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 747                                                         unsigned int flags)
 748         {
 749         BIO *cont;
 750         int r;
 751         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
 752                 {
 753                 CMSerr(CMS_F_CMS_UNCOMPRESS,
 754                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
 755                 return 0;
 756                 }
 757
 758         if (!dcont && !check_content(cms))
 759                 return 0;
 760
 761         cont = CMS_dataInit(cms, dcont);
 762         if (!cont)
 763                 return 0;
 764         r = cms_copy_content(out, cont, flags);
 765         do_free_upto(cont, dcont);
 766         return r;
 767         }
 768
 769 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 770         {
 771         CMS_ContentInfo *cms;
 772         if (comp_nid <= 0)
 773                 comp_nid = NID_zlib_compression;
 774         cms = cms_CompressedData_create(comp_nid);
 775         if (!cms)
 776                 return NULL;
 777
 778         if(!(flags & CMS_DETACHED))
 779                 {
 780                 flags &= ~CMS_STREAM;
 781                 CMS_set_detached(cms, 0);
 782                 }
 783
 784         if (CMS_final(cms, in, NULL, flags))
 785                 return cms;
 786
 787         CMS_ContentInfo_free(cms);
 788         return NULL;
 789         }
 790
 791 #else
 792
 793 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 794                                                         unsigned int flags)
 795         {
 796         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 797         return 0;
 798         }
 799
 800 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 801         {
 802         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 803         return NULL;
 804         }
 805
 806 #endif