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