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 #include "asn1_locl.h"
  62
  63 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
  64         {
  65         unsigned char buf[4096];
  66         int r = 0, i;
  67         BIO *tmpout = NULL;
  68
  69         if (out == NULL)
  70                 tmpout = BIO_new(BIO_s_null());
  71         else if (flags & CMS_TEXT)
  72                 {
  73                 tmpout = BIO_new(BIO_s_mem());
  74                 BIO_set_mem_eof_return(tmpout, 0);
  75                 }
  76         else
  77                 tmpout = out;
  78
  79         if(!tmpout)
  80                 {
  81                 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
  82                 goto err;
  83                 }
  84
  85         /* Read all content through chain to process digest, decrypt etc */
  86         for (;;)
  87         {
  88                 i=BIO_read(in,buf,sizeof(buf));
  89                 if (i <= 0)
  90                         {
  91                         if (BIO_method_type(in) == BIO_TYPE_CIPHER)
  92                                 {
  93                                 if (!BIO_get_cipher_status(in))
  94                                         goto err;
  95                                 }
  96                         if (i < 0)
  97                                 goto err;
  98                         break;
  99                         }
 100
 101                 if (tmpout && (BIO_write(tmpout, buf, i) != i))
 102                         goto err;
 103         }
 104
 105         if(flags & CMS_TEXT)
 106                 {
 107                 if(!SMIME_text(tmpout, out))
 108                         {
 109                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
 110                         goto err;
 111                         }
 112                 }
 113
 114         r = 1;
 115
 116         err:
 117         if (tmpout && (tmpout != out))
 118                 BIO_free(tmpout);
 119         return r;
 120
 121         }
 122
 123 static int check_content(CMS_ContentInfo *cms)
 124         {
 125         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 126         if (!pos || !*pos)
 127                 {
 128                 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
 129                 return 0;
 130                 }
 131         return 1;
 132         }
 133
 134 static void do_free_upto(BIO *f, BIO *upto)
 135         {
 136         if (upto)
 137                 {
 138                 BIO *tbio;
 139                 do
 140                         {
 141                         tbio = BIO_pop(f);
 142                         BIO_free(f);
 143                         f = tbio;
 144                         }
 145                 while (f != upto);
 146                 }
 147         else
 148                 BIO_free_all(f);
 149         }
 150
 151 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
 152         {
 153         BIO *cont;
 154         int r;
 155         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
 156                 {
 157                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
 158                 return 0;
 159                 }
 160         cont = CMS_dataInit(cms, NULL);
 161         if (!cont)
 162                 return 0;
 163         r = cms_copy_content(out, cont, flags);
 164         BIO_free_all(cont);
 165         return r;
 166         }
 167
 168 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
 169         {
 170         CMS_ContentInfo *cms;
 171         cms = cms_Data_create();
 172         if (!cms)
 173                 return NULL;
 174
 175         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 176                 return cms;
 177
 178         CMS_ContentInfo_free(cms);
 179
 180         return NULL;
 181         }
 182
 183 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 184                                                         unsigned int flags)
 185         {
 186         BIO *cont;
 187         int r;
 188         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
 189                 {
 190                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
 191                 return 0;
 192                 }
 193
 194         if (!dcont && !check_content(cms))
 195                 return 0;
 196
 197         cont = CMS_dataInit(cms, dcont);
 198         if (!cont)
 199                 return 0;
 200         r = cms_copy_content(out, cont, flags);
 201         if (r)
 202                 r = cms_DigestedData_do_final(cms, cont, 1);
 203         do_free_upto(cont, dcont);
 204         return r;
 205         }
 206
 207 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
 208                                         unsigned int flags)
 209         {
 210         CMS_ContentInfo *cms;
 211         if (!md)
 212                 md = EVP_sha1();
 213         cms = cms_DigestedData_create(md);
 214         if (!cms)
 215                 return NULL;
 216
 217         if(!(flags & CMS_DETACHED))
 218                 CMS_set_detached(cms, 0);
 219
 220         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 221                 return cms;
 222
 223         CMS_ContentInfo_free(cms);
 224         return NULL;
 225         }
 226
 227 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
 228                                 const unsigned char *key, size_t keylen,
 229                                 BIO *dcont, BIO *out, unsigned int flags)
 230         {
 231         BIO *cont;
 232         int r;
 233         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
 234                 {
 235                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
 236                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
 237                 return 0;
 238                 }
 239
 240         if (!dcont && !check_content(cms))
 241                 return 0;
 242
 243         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
 244                 return 0;
 245         cont = CMS_dataInit(cms, dcont);
 246         if (!cont)
 247                 return 0;
 248         r = cms_copy_content(out, cont, flags);
 249         do_free_upto(cont, dcont);
 250         return r;
 251         }
 252
 253 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
 254                                         const unsigned char *key, size_t keylen,
 255                                         unsigned int flags)
 256         {
 257         CMS_ContentInfo *cms;
 258         if (!cipher)
 259                 {
 260                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
 261                 return NULL;
 262                 }
 263         cms = CMS_ContentInfo_new();
 264         if (!cms)
 265                 return NULL;
 266         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
 267                 return NULL;
 268
 269         if(!(flags & CMS_DETACHED))
 270                 CMS_set_detached(cms, 0);
 271
 272         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 273                 || CMS_final(cms, in, NULL, flags))
 274                 return cms;
 275
 276         CMS_ContentInfo_free(cms);
 277         return NULL;
 278         }
 279
 280 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
 281                                         X509_STORE *store,
 282                                         STACK_OF(X509) *certs,
 283                                         STACK_OF(X509_CRL) *crls,
 284                                         unsigned int flags)
 285         {
 286         X509_STORE_CTX ctx;
 287         X509 *signer;
 288         int i, j, r = 0;
 289         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 290         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
 291                 {
 292                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 293                                                 CMS_R_STORE_INIT_ERROR);
 294                 goto err;
 295                 }
 296         X509_STORE_CTX_set_default(&ctx, "smime_sign");
 297         if (crls)
 298                 X509_STORE_CTX_set0_crls(&ctx, crls);
 299
 300         i = X509_verify_cert(&ctx);
 301         if (i <= 0)
 302                 {
 303                 j = X509_STORE_CTX_get_error(&ctx);
 304                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 305                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
 306                 ERR_add_error_data(2, "Verify error:",
 307                                          X509_verify_cert_error_string(j));
 308                 goto err;
 309                 }
 310         r = 1;
 311         err:
 312         X509_STORE_CTX_cleanup(&ctx);
 313         return r;
 314
 315         }
 316
 317 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
 318                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
 319         {
 320         CMS_SignerInfo *si;
 321         STACK_OF(CMS_SignerInfo) *sinfos;
 322         STACK_OF(X509) *cms_certs = NULL;
 323         STACK_OF(X509_CRL) *crls = NULL;
 324         X509 *signer;
 325         int i, scount = 0, ret = 0;
 326         BIO *cmsbio = NULL, *tmpin = NULL;
 327
 328         if (!dcont && !check_content(cms))
 329                 return 0;
 330
 331         /* Attempt to find all signer certificates */
 332
 333         sinfos = CMS_get0_SignerInfos(cms);
 334
 335         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
 336                 {
 337                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
 338                 goto err;
 339                 }
 340
 341         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 342                 {
 343                 si = sk_CMS_SignerInfo_value(sinfos, i);
 344                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 345                 if (signer)
 346                         scount++;
 347                 }
 348
 349         if (scount != sk_CMS_SignerInfo_num(sinfos))
 350                 scount += CMS_set1_signers_certs(cms, certs, flags);
 351
 352         if (scount != sk_CMS_SignerInfo_num(sinfos))
 353                 {
 354                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
 355                 goto err;
 356                 }
 357
 358         /* Attempt to verify all signers certs */
 359
 360         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
 361                 {
 362                 cms_certs = CMS_get1_certs(cms);
 363                 if (!(flags & CMS_NOCRL))
 364                         crls = CMS_get1_crls(cms);
 365                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 366                         {
 367                         si = sk_CMS_SignerInfo_value(sinfos, i);
 368                         if (!cms_signerinfo_verify_cert(si, store,
 369                                                         cms_certs, crls, flags))
 370                                 goto err;
 371                         }
 372                 }
 373
 374         /* Attempt to verify all SignerInfo signed attribute signatures */
 375
 376         if (!(flags & CMS_NO_ATTR_VERIFY))
 377                 {
 378                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 379                         {
 380                         si = sk_CMS_SignerInfo_value(sinfos, i);
 381                         if (CMS_signed_get_attr_count(si) < 0)
 382                                 continue;
 383                         if (CMS_SignerInfo_verify(si) <= 0)
 384                                 goto err;
 385                         }
 386                 }
 387
 388         /* Performance optimization: if the content is a memory BIO then
 389          * store its contents in a temporary read only memory BIO. This
 390          * avoids potentially large numbers of slow copies of data which will
 391          * occur when reading from a read write memory BIO when signatures
 392          * are calculated.
 393          */
 394
 395         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
 396                 {
 397                 char *ptr;
 398                 long len;
 399                 len = BIO_get_mem_data(dcont, &ptr);
 400                 tmpin = BIO_new_mem_buf(ptr, len);
 401                 if (tmpin == NULL)
 402                         {
 403                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 404                         return 0;
 405                         }
 406                 }
 407         else
 408                 tmpin = dcont;
 409
 410
 411         cmsbio=CMS_dataInit(cms, tmpin);
 412         if (!cmsbio)
 413                 goto err;
 414
 415         if (!cms_copy_content(out, cmsbio, flags))
 416                 goto err;
 417
 418         if (!(flags & CMS_NO_CONTENT_VERIFY))
 419                 {
 420                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 421                         {
 422                         si = sk_CMS_SignerInfo_value(sinfos, i);
 423                         if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
 424                                 {
 425                                 CMSerr(CMS_F_CMS_VERIFY,
 426                                         CMS_R_CONTENT_VERIFY_ERROR);
 427                                 goto err;
 428                                 }
 429                         }
 430                 }
 431
 432         ret = 1;
 433
 434         err:
 435
 436         if (dcont && (tmpin == dcont))
 437                 do_free_upto(cmsbio, dcont);
 438         else
 439                 BIO_free_all(cmsbio);
 440
 441         if (cms_certs)
 442                 sk_X509_pop_free(cms_certs, X509_free);
 443         if (crls)
 444                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 445
 446         return ret;
 447         }
 448
 449 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 450                         STACK_OF(X509) *certs,
 451                         X509_STORE *store, unsigned int flags)
 452         {
 453         int r;
 454         flags &= ~(CMS_DETACHED|CMS_TEXT);
 455         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 456         if (r <= 0)
 457                 return r;
 458         return cms_Receipt_verify(rcms, ocms);
 459         }
 460
 461 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 462                                                 BIO *data, unsigned int flags)
 463         {
 464         CMS_ContentInfo *cms;
 465         int i;
 466
 467         cms = CMS_ContentInfo_new();
 468         if (!cms || !CMS_SignedData_init(cms))
 469                 goto merr;
 470
 471         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
 472                 {
 473                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 474                 goto err;
 475                 }
 476
 477         for (i = 0; i < sk_X509_num(certs); i++)
 478                 {
 479                 X509 *x = sk_X509_value(certs, i);
 480                 if (!CMS_add1_cert(cms, x))
 481                         goto merr;
 482                 }
 483
 484         if(!(flags & CMS_DETACHED))
 485                 CMS_set_detached(cms, 0);
 486
 487         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 488                 || CMS_final(cms, data, NULL, flags))
 489                 return cms;
 490         else
 491                 goto err;
 492
 493         merr:
 494         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 495
 496         err:
 497         if (cms)
 498                 CMS_ContentInfo_free(cms);
 499         return NULL;
 500         }
 501
 502 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 503                                         X509 *signcert, EVP_PKEY *pkey,
 504                                         STACK_OF(X509) *certs,
 505                                         unsigned int flags)
 506         {
 507         CMS_SignerInfo *rct_si;
 508         CMS_ContentInfo *cms = NULL;
 509         ASN1_OCTET_STRING **pos, *os;
 510         BIO *rct_cont = NULL;
 511         int r = 0;
 512
 513         flags &= ~(CMS_STREAM|CMS_TEXT);
 514         /* Not really detached but avoids content being allocated */
 515         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
 516         if (!pkey || !signcert)
 517                 {
 518                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 519                 return NULL;
 520                 }
 521
 522         /* Initialize signed data */
 523
 524         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 525         if (!cms)
 526                 goto err;
 527
 528         /* Set inner content type to signed receipt */
 529         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 530                 goto err;
 531
 532         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 533         if (!rct_si)
 534                 {
 535                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 536                 goto err;
 537                 }
 538
 539         os = cms_encode_Receipt(si);
 540
 541         if (!os)
 542                 goto err;
 543
 544         /* Set content to digest */
 545         rct_cont = BIO_new_mem_buf(os->data, os->length);
 546         if (!rct_cont)
 547                 goto err;
 548
 549         /* Add msgSigDigest attribute */
 550
 551         if (!cms_msgSigDigest_add1(rct_si, si))
 552                 goto err;
 553
 554         /* Finalize structure */
 555         if (!CMS_final(cms, rct_cont, NULL, flags))
 556                 goto err;
 557
 558         /* Set embedded content */
 559         pos = CMS_get0_content(cms);
 560         *pos = os;
 561
 562         r = 1;
 563
 564         err:
 565         if (rct_cont)
 566                 BIO_free(rct_cont);
 567         if (r)
 568                 return cms;
 569         CMS_ContentInfo_free(cms);
 570         return NULL;
 571
 572         }
 573
 574 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 575                                 const EVP_CIPHER *cipher, unsigned int flags)
 576         {
 577         CMS_ContentInfo *cms;
 578         int i;
 579         X509 *recip;
 580         cms = CMS_EnvelopedData_create(cipher);
 581         if (!cms)
 582                 goto merr;
 583         for (i = 0; i < sk_X509_num(certs); i++)
 584                 {
 585                 recip = sk_X509_value(certs, i);
 586                 if (!CMS_add1_recipient_cert(cms, recip, flags))
 587                         {
 588                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 589                         goto err;
 590                         }
 591                 }
 592
 593         if(!(flags & CMS_DETACHED))
 594                 CMS_set_detached(cms, 0);
 595
 596         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 597                 || CMS_final(cms, data, NULL, flags))
 598                 return cms;
 599         else
 600                 goto err;
 601
 602         merr:
 603         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 604         err:
 605         if (cms)
 606                 CMS_ContentInfo_free(cms);
 607         return NULL;
 608         }
 609
 610 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
 611                                                 EVP_PKEY *pk, X509 *cert)
 612         {
 613         int i;
 614         STACK_OF(CMS_RecipientEncryptedKey) *reks;
 615         CMS_RecipientEncryptedKey *rek;
 616         reks = CMS_RecipientInfo_kari_get0_reks(ri);
 617         if (!cert)
 618                 return 0;
 619         for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++)
 620                 {
 621                 int rv;
 622                 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
 623                 if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
 624                         continue;
 625                 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
 626                 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
 627                 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
 628                 if (rv > 0)
 629                         return 1;
 630                 return -1;
 631                 }
 632         return 0;
 633         }
 634
 635 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 636         {
 637         STACK_OF(CMS_RecipientInfo) *ris;
 638         CMS_RecipientInfo *ri;
 639         int i, r, ri_type;
 640         int debug = 0, match_ri = 0;
 641         ris = CMS_get0_RecipientInfos(cms);
 642         if (ris)
 643                 debug = cms->d.envelopedData->encryptedContentInfo->debug;
 644         ri_type = cms_pkey_get_ri_type(pk);
 645         if (ri_type == CMS_RECIPINFO_NONE)
 646                 {
 647                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 648                                         CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 649                 return 0;
 650                 }
 651
 652         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 653                 {
 654                 ri = sk_CMS_RecipientInfo_value(ris, i);
 655                 if (CMS_RecipientInfo_type(ri) != ri_type)
 656                                 continue;
 657                 match_ri = 1;
 658                 if (ri_type == CMS_RECIPINFO_AGREE)
 659                         {
 660                         r = cms_kari_set1_pkey(cms, ri, pk, cert);
 661                         if (r > 0)
 662                                 return 1;
 663                         if (r < 0)
 664                                 return 0;
 665                         }
 666                 /* If we have a cert try matching RecipientInfo
 667                  * otherwise try them all.
 668                  */
 669                 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert))
 670                         {
 671                         CMS_RecipientInfo_set0_pkey(ri, pk);
 672                         r = CMS_RecipientInfo_decrypt(cms, ri);
 673                         CMS_RecipientInfo_set0_pkey(ri, NULL);
 674                         if (cert)
 675                                 {
 676                                 /* If not debugging clear any error and
 677                                  * return success to avoid leaking of
 678                                  * information useful to MMA
 679                                  */
 680                                 if (!debug)
 681                                         {
 682                                         ERR_clear_error();
 683                                         return 1;
 684                                         }
 685                                 if (r > 0)
 686                                         return 1;
 687                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 688                                                 CMS_R_DECRYPT_ERROR);
 689                                 return 0;
 690                                 }
 691                         /* If no cert and not debugging don't leave loop
 692                          * after first successful decrypt. Always attempt
 693                          * to decrypt all recipients to avoid leaking timing
 694                          * of a successful decrypt.
 695                          */
 696                         else if (r > 0 && debug)
 697                                 return 1;
 698                         }
 699                 }
 700         /* If no cert and not debugging always return success */
 701         if (match_ri && !cert && !debug)
 702                 {
 703                 ERR_clear_error();
 704                 return 1;
 705                 }
 706
 707         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 708         return 0;
 709
 710         }
 711
 712 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 713                                 unsigned char *key, size_t keylen,
 714                                 unsigned char *id, size_t idlen)
 715         {
 716         STACK_OF(CMS_RecipientInfo) *ris;
 717         CMS_RecipientInfo *ri;
 718         int i, r;
 719         ris = CMS_get0_RecipientInfos(cms);
 720         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 721                 {
 722                 ri = sk_CMS_RecipientInfo_value(ris, i);
 723                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 724                                 continue;
 725
 726                 /* If we have an id try matching RecipientInfo
 727                  * otherwise try them all.
 728                  */
 729                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
 730                         {
 731                         CMS_RecipientInfo_set0_key(ri, key, keylen);
 732                         r = CMS_RecipientInfo_decrypt(cms, ri);
 733                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
 734                         if (r > 0)
 735                                 return 1;
 736                         if (id)
 737                                 {
 738                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
 739                                                 CMS_R_DECRYPT_ERROR);
 740                                 return 0;
 741                                 }
 742                         ERR_clear_error();
 743                         }
 744                 }
 745
 746         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 747         return 0;
 748
 749         }
 750
 751 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
 752                                 unsigned char *pass, ossl_ssize_t passlen)
 753         {
 754         STACK_OF(CMS_RecipientInfo) *ris;
 755         CMS_RecipientInfo *ri;
 756         int i, r;
 757         ris = CMS_get0_RecipientInfos(cms);
 758         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 759                 {
 760                 ri = sk_CMS_RecipientInfo_value(ris, i);
 761                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
 762                                 continue;
 763                 CMS_RecipientInfo_set0_password(ri, pass, passlen);
 764                 r = CMS_RecipientInfo_decrypt(cms, ri);
 765                 CMS_RecipientInfo_set0_password(ri, NULL, 0);
 766                 if (r > 0)
 767                         return 1;
 768                 }
 769
 770         CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
 771         return 0;
 772
 773         }
 774
 775 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 776                                 BIO *dcont, BIO *out,
 777                                 unsigned int flags)
 778         {
 779         int r;
 780         BIO *cont;
 781         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
 782                 {
 783                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 784                 return 0;
 785                 }
 786         if (!dcont && !check_content(cms))
 787                 return 0;
 788         if (flags & CMS_DEBUG_DECRYPT)
 789                 cms->d.envelopedData->encryptedContentInfo->debug = 1;
 790         else
 791                 cms->d.envelopedData->encryptedContentInfo->debug = 0;
 792         if (!pk && !cert && !dcont && !out)
 793                 return 1;
 794         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 795                 return 0;
 796         cont = CMS_dataInit(cms, dcont);
 797         if (!cont)
 798                 return 0;
 799         r = cms_copy_content(out, cont, flags);
 800         do_free_upto(cont, dcont);
 801         return r;
 802         }
 803
 804 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
 805         {
 806         BIO *cmsbio;
 807         int ret = 0;
 808         if (!(cmsbio = CMS_dataInit(cms, dcont)))
 809                 {
 810                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
 811                 return 0;
 812                 }
 813
 814         SMIME_crlf_copy(data, cmsbio, flags);
 815
 816         (void)BIO_flush(cmsbio);
 817
 818
 819         if (!CMS_dataFinal(cms, cmsbio))
 820                 {
 821                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
 822                 goto err;
 823                 }
 824
 825         ret = 1;
 826
 827         err:
 828         do_free_upto(cmsbio, dcont);
 829
 830         return ret;
 831
 832         }
 833
 834 #ifdef ZLIB
 835
 836 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 837                                                         unsigned int flags)
 838         {
 839         BIO *cont;
 840         int r;
 841         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
 842                 {
 843                 CMSerr(CMS_F_CMS_UNCOMPRESS,
 844                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
 845                 return 0;
 846                 }
 847
 848         if (!dcont && !check_content(cms))
 849                 return 0;
 850
 851         cont = CMS_dataInit(cms, dcont);
 852         if (!cont)
 853                 return 0;
 854         r = cms_copy_content(out, cont, flags);
 855         do_free_upto(cont, dcont);
 856         return r;
 857         }
 858
 859 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 860         {
 861         CMS_ContentInfo *cms;
 862         if (comp_nid <= 0)
 863                 comp_nid = NID_zlib_compression;
 864         cms = cms_CompressedData_create(comp_nid);
 865         if (!cms)
 866                 return NULL;
 867
 868         if(!(flags & CMS_DETACHED))
 869                 CMS_set_detached(cms, 0);
 870
 871         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 872                 return cms;
 873
 874         CMS_ContentInfo_free(cms);
 875         return NULL;
 876         }
 877
 878 #else
 879
 880 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 881                                                         unsigned int flags)
 882         {
 883         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 884         return 0;
 885         }
 886
 887 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 888         {
 889         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 890         return NULL;
 891         }
 892
 893 #endif