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