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                 if (!(flags & CMS_NOCRL))
 346                         crls = CMS_get1_crls(cms);
 347                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 348                         {
 349                         si = sk_CMS_SignerInfo_value(sinfos, i);
 350                         if (!cms_signerinfo_verify_cert(si, store,
 351                                                         cms_certs, crls, flags))
 352                                 goto err;
 353                         }
 354                 }
 355
 356         /* Attempt to verify all SignerInfo signed attribute signatures */
 357
 358         if (!(flags & CMS_NO_ATTR_VERIFY))
 359                 {
 360                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 361                         {
 362                         si = sk_CMS_SignerInfo_value(sinfos, i);
 363                         if (CMS_signed_get_attr_count(si) < 0)
 364                                 continue;
 365                         if (CMS_SignerInfo_verify(si) <= 0)
 366                                 goto err;
 367                         }
 368                 }
 369
 370         /* Performance optimization: if the content is a memory BIO then
 371          * store its contents in a temporary read only memory BIO. This
 372          * avoids potentially large numbers of slow copies of data which will
 373          * occur when reading from a read write memory BIO when signatures
 374          * are calculated.
 375          */
 376
 377         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
 378                 {
 379                 char *ptr;
 380                 long len;
 381                 len = BIO_get_mem_data(dcont, &ptr);
 382                 tmpin = BIO_new_mem_buf(ptr, len);
 383                 if (tmpin == NULL)
 384                         {
 385                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 386                         return 0;
 387                         }
 388                 }
 389         else
 390                 tmpin = dcont;
 391
 392
 393         cmsbio=CMS_dataInit(cms, tmpin);
 394         if (!cmsbio)
 395                 goto err;
 396
 397         if (!cms_copy_content(out, cmsbio, flags))
 398                 goto err;
 399
 400         if (!(flags & CMS_NO_CONTENT_VERIFY))
 401                 {
 402                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 403                         {
 404                         si = sk_CMS_SignerInfo_value(sinfos, i);
 405                         if (!CMS_SignerInfo_verify_content(si, cmsbio))
 406                                 {
 407                                 CMSerr(CMS_F_CMS_VERIFY,
 408                                         CMS_R_CONTENT_VERIFY_ERROR);
 409                                 goto err;
 410                                 }
 411                         }
 412                 }
 413
 414         ret = 1;
 415
 416         err:
 417
 418         if (dcont && (tmpin == dcont))
 419                 BIO_pop(cmsbio);
 420         BIO_free_all(cmsbio);
 421
 422         if (cms_certs)
 423                 sk_X509_pop_free(cms_certs, X509_free);
 424         if (crls)
 425                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 426
 427         return ret;
 428         }
 429
 430 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 431                         STACK_OF(X509) *certs,
 432                         X509_STORE *store, unsigned int flags)
 433         {
 434         int r;
 435         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 436         if (r <= 0)
 437                 return r;
 438         return cms_Receipt_verify(rcms, ocms);
 439         }
 440
 441 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 442                                                 BIO *data, unsigned int flags)
 443         {
 444         CMS_ContentInfo *cms;
 445         int i;
 446         cms = CMS_ContentInfo_new();
 447         if (!cms)
 448                 goto merr;
 449         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
 450                 {
 451                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 452                 goto err;
 453                 }
 454         for (i = 0; i < sk_X509_num(certs); i++)
 455                 {
 456                 X509 *x = sk_X509_value(certs, i);
 457                 if (!CMS_add1_cert(cms, x))
 458                         goto merr;
 459                 }
 460         /* If no signer or certs initialize signedData */
 461         if (!pkey && !i && !CMS_SignedData_init(cms))
 462                 goto merr;
 463
 464         if(!(flags & CMS_DETACHED))
 465                 {
 466                 flags &= ~CMS_STREAM;
 467                 CMS_set_detached(cms, 0);
 468                 }
 469
 470         if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, data, flags))
 471                 return cms;
 472         else
 473                 goto err;
 474
 475         merr:
 476         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 477
 478         err:
 479         if (cms)
 480                 CMS_ContentInfo_free(cms);
 481         return NULL;
 482         }
 483
 484 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 485                                         X509 *signcert, EVP_PKEY *pkey,
 486                                         STACK_OF(X509) *certs,
 487                                         unsigned int flags)
 488         {
 489         CMS_SignerInfo *rct_si;
 490         CMS_ContentInfo *cms = NULL;
 491         ASN1_OCTET_STRING **pos, *os;
 492         BIO *rct_cont = NULL;
 493         int r = 0;
 494
 495         flags &= ~CMS_STREAM;
 496         /* Not really detached but avoids content being allocated */
 497         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
 498         if (!pkey || !signcert)
 499                 {
 500                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 501                 return NULL;
 502                 }
 503
 504         /* Initialize signed data */
 505
 506         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 507         if (!cms)
 508                 goto err;
 509
 510         /* Set inner content type to signed receipt */
 511         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 512                 goto err;
 513
 514         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 515         if (!rct_si)
 516                 {
 517                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 518                 goto err;
 519                 }
 520
 521         os = cms_encode_Receipt(si);
 522
 523         if (!os)
 524                 goto err;
 525
 526         /* Set content to digest */
 527         rct_cont = BIO_new_mem_buf(os->data, os->length);
 528         if (!rct_cont)
 529                 goto err;
 530
 531         /* Add msgSigDigest attribute */
 532
 533         if (!cms_msgSigDigest_add1(rct_si, si))
 534                 goto err;
 535
 536         /* Finalize structure */
 537         if (!CMS_final(cms, rct_cont, flags))
 538                 goto err;
 539
 540         /* Set embedded content */
 541         pos = CMS_get0_content(cms);
 542         *pos = os;
 543
 544         r = 1;
 545
 546         err:
 547         if (rct_cont)
 548                 BIO_free(rct_cont);
 549         if (r)
 550                 return cms;
 551         CMS_ContentInfo_free(cms);
 552         return NULL;
 553
 554         }
 555
 556 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 557                                 const EVP_CIPHER *cipher, unsigned int flags)
 558         {
 559         CMS_ContentInfo *cms;
 560         int i;
 561         X509 *recip;
 562         cms = CMS_EnvelopedData_create(cipher);
 563         if (!cms)
 564                 goto merr;
 565         for (i = 0; i < sk_X509_num(certs); i++)
 566                 {
 567                 recip = sk_X509_value(certs, i);
 568                 if (!CMS_add1_recipient_cert(cms, recip, flags))
 569                         {
 570                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 571                         goto err;
 572                         }
 573                 }
 574
 575         if(!(flags & CMS_DETACHED))
 576                 {
 577                 flags &= ~CMS_STREAM;
 578                 CMS_set_detached(cms, 0);
 579                 }
 580
 581         if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, data, flags))
 582                 return cms;
 583         else
 584                 goto err;
 585
 586         merr:
 587         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 588         err:
 589         if (cms)
 590                 CMS_ContentInfo_free(cms);
 591         return NULL;
 592         }
 593
 594 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 595         {
 596         STACK_OF(CMS_RecipientInfo) *ris;
 597         CMS_RecipientInfo *ri;
 598         int i, r;
 599         ris = CMS_get0_RecipientInfos(cms);
 600         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 601                 {
 602                 ri = sk_CMS_RecipientInfo_value(ris, i);
 603                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
 604                                 continue;
 605                 /* If we have a cert try matching RecipientInfo
 606                  * otherwise try them all.
 607                  */
 608                 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
 609                         {
 610                         CMS_RecipientInfo_set0_pkey(ri, pk);
 611                         r = CMS_RecipientInfo_decrypt(cms, ri);
 612                         CMS_RecipientInfo_set0_pkey(ri, NULL);
 613                         if (r > 0)
 614                                 return 1;
 615                         if (cert)
 616                                 {
 617                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 618                                                 CMS_R_DECRYPT_ERROR);
 619                                 return 0;
 620                                 }
 621                         ERR_clear_error();
 622                         }
 623                 }
 624
 625         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 626         return 0;
 627
 628         }
 629
 630 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 631                                 unsigned char *key, size_t keylen,
 632                                 unsigned char *id, size_t idlen)
 633         {
 634         STACK_OF(CMS_RecipientInfo) *ris;
 635         CMS_RecipientInfo *ri;
 636         int i, r;
 637         ris = CMS_get0_RecipientInfos(cms);
 638         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 639                 {
 640                 ri = sk_CMS_RecipientInfo_value(ris, i);
 641                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 642                                 continue;
 643
 644                 /* If we have an id try matching RecipientInfo
 645                  * otherwise try them all.
 646                  */
 647                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
 648                         {
 649                         CMS_RecipientInfo_set0_key(ri, key, keylen);
 650                         r = CMS_RecipientInfo_decrypt(cms, ri);
 651                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
 652                         if (r > 0)
 653                                 return 1;
 654                         if (id)
 655                                 {
 656                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
 657                                                 CMS_R_DECRYPT_ERROR);
 658                                 return 0;
 659                                 }
 660                         ERR_clear_error();
 661                         }
 662                 }
 663
 664         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 665         return 0;
 666
 667         }
 668
 669 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 670                                 BIO *dcont, BIO *out,
 671                                 unsigned int flags)
 672         {
 673         int r;
 674         BIO *cont;
 675         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
 676                 {
 677                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 678                 return 0;
 679                 }
 680         if (!dcont && !check_content(cms))
 681                 return 0;
 682         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 683                 return 0;
 684
 685         cont = CMS_dataInit(cms, dcont);
 686         if (!cont)
 687                 return 0;
 688         r = cms_copy_content(out, cont, flags);
 689         BIO_free_all(cont);
 690         return r;
 691         }
 692
 693 int CMS_final(CMS_ContentInfo *cms, BIO *data, int flags)
 694         {
 695         BIO *cmsbio;
 696         int ret = 0;
 697         if (!(cmsbio = CMS_dataInit(cms, NULL)))
 698                 {
 699                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
 700                 return 0;
 701                 }
 702
 703         SMIME_crlf_copy(data, cmsbio, flags);
 704
 705         (void)BIO_flush(cmsbio);
 706
 707
 708         if (!CMS_dataFinal(cms, cmsbio))
 709                 {
 710                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
 711                 goto err;
 712                 }
 713
 714         ret = 1;
 715
 716         err:
 717         BIO_free_all(cmsbio);
 718
 719         return ret;
 720
 721         }
 722
 723 #ifdef ZLIB
 724
 725 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 726                                                         unsigned int flags)
 727         {
 728         BIO *cont;
 729         int r;
 730         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
 731                 {
 732                 CMSerr(CMS_F_CMS_UNCOMPRESS,
 733                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
 734                 return 0;
 735                 }
 736
 737         if (!dcont && !check_content(cms))
 738                 return 0;
 739
 740         cont = CMS_dataInit(cms, dcont);
 741         if (!cont)
 742                 return 0;
 743         r = cms_copy_content(out, cont, flags);
 744         BIO_free_all(cont);
 745         return r;
 746         }
 747
 748 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 749         {
 750         CMS_ContentInfo *cms;
 751         if (comp_nid <= 0)
 752                 comp_nid = NID_zlib_compression;
 753         cms = cms_CompressedData_create(comp_nid);
 754         if (!cms)
 755                 return NULL;
 756
 757         if(!(flags & CMS_DETACHED))
 758                 {
 759                 flags &= ~CMS_STREAM;
 760                 CMS_set_detached(cms, 0);
 761                 }
 762
 763         if (CMS_final(cms, in, flags))
 764                 return cms;
 765
 766         CMS_ContentInfo_free(cms);
 767         return NULL;
 768         }
 769
 770 #else
 771
 772 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 773                                                         unsigned int flags)
 774         {
 775         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 776         return 0;
 777         }
 778
 779 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 780         {
 781         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 782         return NULL;
 783         }
 784
 785 #endif