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