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