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 BIO *cms_get_text_bio(BIO *out, unsigned int flags)
  64         {
  65         BIO *rbio;
  66         if (out == NULL)
  67                 rbio = BIO_new(BIO_s_null());
  68         else if (flags & CMS_TEXT)
  69                 {
  70                 rbio = BIO_new(BIO_s_mem());
  71                 BIO_set_mem_eof_return(rbio, 0);
  72                 }
  73         else
  74                 rbio = out;
  75         return rbio;
  76         }
  77
  78 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
  79         {
  80         unsigned char buf[4096];
  81         int r = 0, i;
  82         BIO *tmpout;
  83
  84         tmpout = cms_get_text_bio(out, flags);
  85
  86         if(!tmpout)
  87                 {
  88                 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
  89                 goto err;
  90                 }
  91
  92         /* Read all content through chain to process digest, decrypt etc */
  93         for (;;)
  94         {
  95                 i=BIO_read(in,buf,sizeof(buf));
  96                 if (i <= 0)
  97                         {
  98                         if (BIO_method_type(in) == BIO_TYPE_CIPHER)
  99                                 {
 100                                 if (!BIO_get_cipher_status(in))
 101                                         goto err;
 102                                 }
 103                         if (i < 0)
 104                                 goto err;
 105                         break;
 106                         }
 107
 108                 if (tmpout && (BIO_write(tmpout, buf, i) != i))
 109                         goto err;
 110         }
 111
 112         if(flags & CMS_TEXT)
 113                 {
 114                 if(!SMIME_text(tmpout, out))
 115                         {
 116                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
 117                         goto err;
 118                         }
 119                 }
 120
 121         r = 1;
 122
 123         err:
 124         if (tmpout && (tmpout != out))
 125                 BIO_free(tmpout);
 126         return r;
 127
 128         }
 129
 130 static int check_content(CMS_ContentInfo *cms)
 131         {
 132         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 133         if (!pos || !*pos)
 134                 {
 135                 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
 136                 return 0;
 137                 }
 138         return 1;
 139         }
 140
 141 static void do_free_upto(BIO *f, BIO *upto)
 142         {
 143         if (upto)
 144                 {
 145                 BIO *tbio;
 146                 do
 147                         {
 148                         tbio = BIO_pop(f);
 149                         BIO_free(f);
 150                         f = tbio;
 151                         }
 152                 while (f && f != upto);
 153                 }
 154         else
 155                 BIO_free_all(f);
 156         }
 157
 158 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
 159         {
 160         BIO *cont;
 161         int r;
 162         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
 163                 {
 164                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
 165                 return 0;
 166                 }
 167         cont = CMS_dataInit(cms, NULL);
 168         if (!cont)
 169                 return 0;
 170         r = cms_copy_content(out, cont, flags);
 171         BIO_free_all(cont);
 172         return r;
 173         }
 174
 175 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
 176         {
 177         CMS_ContentInfo *cms;
 178         cms = cms_Data_create();
 179         if (!cms)
 180                 return NULL;
 181
 182         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 183                 return cms;
 184
 185         CMS_ContentInfo_free(cms);
 186
 187         return NULL;
 188         }
 189
 190 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 191                                                         unsigned int flags)
 192         {
 193         BIO *cont;
 194         int r;
 195         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
 196                 {
 197                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
 198                 return 0;
 199                 }
 200
 201         if (!dcont && !check_content(cms))
 202                 return 0;
 203
 204         cont = CMS_dataInit(cms, dcont);
 205         if (!cont)
 206                 return 0;
 207         r = cms_copy_content(out, cont, flags);
 208         if (r)
 209                 r = cms_DigestedData_do_final(cms, cont, 1);
 210         do_free_upto(cont, dcont);
 211         return r;
 212         }
 213
 214 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
 215                                         unsigned int flags)
 216         {
 217         CMS_ContentInfo *cms;
 218         if (!md)
 219                 md = EVP_sha1();
 220         cms = cms_DigestedData_create(md);
 221         if (!cms)
 222                 return NULL;
 223
 224         if(!(flags & CMS_DETACHED))
 225                 CMS_set_detached(cms, 0);
 226
 227         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 228                 return cms;
 229
 230         CMS_ContentInfo_free(cms);
 231         return NULL;
 232         }
 233
 234 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
 235                                 const unsigned char *key, size_t keylen,
 236                                 BIO *dcont, BIO *out, unsigned int flags)
 237         {
 238         BIO *cont;
 239         int r;
 240         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
 241                 {
 242                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
 243                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
 244                 return 0;
 245                 }
 246
 247         if (!dcont && !check_content(cms))
 248                 return 0;
 249
 250         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
 251                 return 0;
 252         cont = CMS_dataInit(cms, dcont);
 253         if (!cont)
 254                 return 0;
 255         r = cms_copy_content(out, cont, flags);
 256         do_free_upto(cont, dcont);
 257         return r;
 258         }
 259
 260 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
 261                                         const unsigned char *key, size_t keylen,
 262                                         unsigned int flags)
 263         {
 264         CMS_ContentInfo *cms;
 265         if (!cipher)
 266                 {
 267                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
 268                 return NULL;
 269                 }
 270         cms = CMS_ContentInfo_new();
 271         if (!cms)
 272                 return NULL;
 273         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
 274                 return NULL;
 275
 276         if(!(flags & CMS_DETACHED))
 277                 CMS_set_detached(cms, 0);
 278
 279         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 280                 || CMS_final(cms, in, NULL, flags))
 281                 return cms;
 282
 283         CMS_ContentInfo_free(cms);
 284         return NULL;
 285         }
 286
 287 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
 288                                         X509_STORE *store,
 289                                         STACK_OF(X509) *certs,
 290                                         STACK_OF(X509_CRL) *crls,
 291                                         unsigned int flags)
 292         {
 293         X509_STORE_CTX ctx;
 294         X509 *signer;
 295         int i, j, r = 0;
 296         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 297         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
 298                 {
 299                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 300                                                 CMS_R_STORE_INIT_ERROR);
 301                 goto err;
 302                 }
 303         X509_STORE_CTX_set_default(&ctx, "smime_sign");
 304         if (crls)
 305                 X509_STORE_CTX_set0_crls(&ctx, crls);
 306
 307         i = X509_verify_cert(&ctx);
 308         if (i <= 0)
 309                 {
 310                 j = X509_STORE_CTX_get_error(&ctx);
 311                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 312                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
 313                 ERR_add_error_data(2, "Verify error:",
 314                                          X509_verify_cert_error_string(j));
 315                 goto err;
 316                 }
 317         r = 1;
 318         err:
 319         X509_STORE_CTX_cleanup(&ctx);
 320         return r;
 321
 322         }
 323
 324 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
 325                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
 326         {
 327         CMS_SignerInfo *si;
 328         STACK_OF(CMS_SignerInfo) *sinfos;
 329         STACK_OF(X509) *cms_certs = NULL;
 330         STACK_OF(X509_CRL) *crls = NULL;
 331         X509 *signer;
 332         int i, scount = 0, ret = 0;
 333         BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
 334
 335         if (!dcont && !check_content(cms))
 336                 return 0;
 337
 338         /* Attempt to find all signer certificates */
 339
 340         sinfos = CMS_get0_SignerInfos(cms);
 341
 342         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
 343                 {
 344                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
 345                 goto err;
 346                 }
 347
 348         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 349                 {
 350                 si = sk_CMS_SignerInfo_value(sinfos, i);
 351                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 352                 if (signer)
 353                         scount++;
 354                 }
 355
 356         if (scount != sk_CMS_SignerInfo_num(sinfos))
 357                 scount += CMS_set1_signers_certs(cms, certs, flags);
 358
 359         if (scount != sk_CMS_SignerInfo_num(sinfos))
 360                 {
 361                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
 362                 goto err;
 363                 }
 364
 365         /* Attempt to verify all signers certs */
 366
 367         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
 368                 {
 369                 cms_certs = CMS_get1_certs(cms);
 370                 if (!(flags & CMS_NOCRL))
 371                         crls = CMS_get1_crls(cms);
 372                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 373                         {
 374                         si = sk_CMS_SignerInfo_value(sinfos, i);
 375                         if (!cms_signerinfo_verify_cert(si, store,
 376                                                         cms_certs, crls, flags))
 377                                 goto err;
 378                         }
 379                 }
 380
 381         /* Attempt to verify all SignerInfo signed attribute signatures */
 382
 383         if (!(flags & CMS_NO_ATTR_VERIFY))
 384                 {
 385                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 386                         {
 387                         si = sk_CMS_SignerInfo_value(sinfos, i);
 388                         if (CMS_signed_get_attr_count(si) < 0)
 389                                 continue;
 390                         if (CMS_SignerInfo_verify(si) <= 0)
 391                                 goto err;
 392                         }
 393                 }
 394
 395         /* Performance optimization: if the content is a memory BIO then
 396          * store its contents in a temporary read only memory BIO. This
 397          * avoids potentially large numbers of slow copies of data which will
 398          * occur when reading from a read write memory BIO when signatures
 399          * are calculated.
 400          */
 401
 402         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
 403                 {
 404                 char *ptr;
 405                 long len;
 406                 len = BIO_get_mem_data(dcont, &ptr);
 407                 tmpin = BIO_new_mem_buf(ptr, len);
 408                 if (tmpin == NULL)
 409                         {
 410                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 411                         return 0;
 412                         }
 413                 }
 414         else
 415                 tmpin = dcont;
 416         /* If not binary mode and detached generate digests by *writing*
 417          * through the BIO. That makes it possible to canonicalise the
 418          * input.
 419          */
 420         if (!(flags & SMIME_BINARY) && dcont)
 421                 {
 422                 /* Create output BIO so we can either handle text or to
 423                  * ensure included content doesn't override detached content.
 424                  */
 425                 tmpout = cms_get_text_bio(out, flags);
 426                 if(!tmpout)
 427                         {
 428                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
 429                         goto err;
 430                         }
 431                 cmsbio = CMS_dataInit(cms, tmpout);
 432                 if (!cmsbio)
 433                         goto err;
 434                 /* Don't use SMIME_TEXT for verify: it adds headers and
 435                  * we want to remove them.
 436                  */
 437                 SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
 438
 439                 if(flags & CMS_TEXT)
 440                         {
 441                         if (!SMIME_text(tmpout, out))
 442                                 {
 443                                 CMSerr(CMS_F_CMS_VERIFY,CMS_R_SMIME_TEXT_ERROR);
 444                                 goto err;
 445                                 }
 446                         }
 447                 }
 448         else
 449                 {
 450                 cmsbio=CMS_dataInit(cms, tmpin);
 451                 if (!cmsbio)
 452                         goto err;
 453
 454                 if (!cms_copy_content(out, cmsbio, flags))
 455                         goto err;
 456
 457                 }
 458         if (!(flags & CMS_NO_CONTENT_VERIFY))
 459                 {
 460                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 461                         {
 462                         si = sk_CMS_SignerInfo_value(sinfos, i);
 463                         if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
 464                                 {
 465                                 CMSerr(CMS_F_CMS_VERIFY,
 466                                         CMS_R_CONTENT_VERIFY_ERROR);
 467                                 goto err;
 468                                 }
 469                         }
 470                 }
 471
 472         ret = 1;
 473
 474         err:
 475         if (!(flags & SMIME_BINARY) && dcont)
 476                 {
 477                 do_free_upto(cmsbio, tmpout);
 478                 if (tmpin != dcont)
 479                         BIO_free(tmpin);
 480                 }
 481         else
 482                 {
 483
 484                 if (dcont && (tmpin == dcont))
 485                         do_free_upto(cmsbio, dcont);
 486                 else
 487                         BIO_free_all(cmsbio);
 488                 }
 489
 490         if (tmpout && out != tmpout)
 491                 BIO_free_all(tmpout);
 492
 493         if (cms_certs)
 494                 sk_X509_pop_free(cms_certs, X509_free);
 495         if (crls)
 496                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 497
 498         return ret;
 499         }
 500
 501 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 502                         STACK_OF(X509) *certs,
 503                         X509_STORE *store, unsigned int flags)
 504         {
 505         int r;
 506         flags &= ~(CMS_DETACHED|CMS_TEXT);
 507         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 508         if (r <= 0)
 509                 return r;
 510         return cms_Receipt_verify(rcms, ocms);
 511         }
 512
 513 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 514                                                 BIO *data, unsigned int flags)
 515         {
 516         CMS_ContentInfo *cms;
 517         int i;
 518
 519         cms = CMS_ContentInfo_new();
 520         if (!cms || !CMS_SignedData_init(cms))
 521                 goto merr;
 522
 523         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
 524                 {
 525                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 526                 goto err;
 527                 }
 528
 529         for (i = 0; i < sk_X509_num(certs); i++)
 530                 {
 531                 X509 *x = sk_X509_value(certs, i);
 532                 if (!CMS_add1_cert(cms, x))
 533                         goto merr;
 534                 }
 535
 536         if(!(flags & CMS_DETACHED))
 537                 CMS_set_detached(cms, 0);
 538
 539         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 540                 || CMS_final(cms, data, NULL, flags))
 541                 return cms;
 542         else
 543                 goto err;
 544
 545         merr:
 546         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 547
 548         err:
 549         if (cms)
 550                 CMS_ContentInfo_free(cms);
 551         return NULL;
 552         }
 553
 554 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 555                                         X509 *signcert, EVP_PKEY *pkey,
 556                                         STACK_OF(X509) *certs,
 557                                         unsigned int flags)
 558         {
 559         CMS_SignerInfo *rct_si;
 560         CMS_ContentInfo *cms = NULL;
 561         ASN1_OCTET_STRING **pos, *os;
 562         BIO *rct_cont = NULL;
 563         int r = 0;
 564
 565         flags &= ~(CMS_STREAM|CMS_TEXT);
 566         /* Not really detached but avoids content being allocated */
 567         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
 568         if (!pkey || !signcert)
 569                 {
 570                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 571                 return NULL;
 572                 }
 573
 574         /* Initialize signed data */
 575
 576         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 577         if (!cms)
 578                 goto err;
 579
 580         /* Set inner content type to signed receipt */
 581         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 582                 goto err;
 583
 584         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 585         if (!rct_si)
 586                 {
 587                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 588                 goto err;
 589                 }
 590
 591         os = cms_encode_Receipt(si);
 592
 593         if (!os)
 594                 goto err;
 595
 596         /* Set content to digest */
 597         rct_cont = BIO_new_mem_buf(os->data, os->length);
 598         if (!rct_cont)
 599                 goto err;
 600
 601         /* Add msgSigDigest attribute */
 602
 603         if (!cms_msgSigDigest_add1(rct_si, si))
 604                 goto err;
 605
 606         /* Finalize structure */
 607         if (!CMS_final(cms, rct_cont, NULL, flags))
 608                 goto err;
 609
 610         /* Set embedded content */
 611         pos = CMS_get0_content(cms);
 612         *pos = os;
 613
 614         r = 1;
 615
 616         err:
 617         if (rct_cont)
 618                 BIO_free(rct_cont);
 619         if (r)
 620                 return cms;
 621         CMS_ContentInfo_free(cms);
 622         return NULL;
 623
 624         }
 625
 626 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 627                                 const EVP_CIPHER *cipher, unsigned int flags)
 628         {
 629         CMS_ContentInfo *cms;
 630         int i;
 631         X509 *recip;
 632         cms = CMS_EnvelopedData_create(cipher);
 633         if (!cms)
 634                 goto merr;
 635         for (i = 0; i < sk_X509_num(certs); i++)
 636                 {
 637                 recip = sk_X509_value(certs, i);
 638                 if (!CMS_add1_recipient_cert(cms, recip, flags))
 639                         {
 640                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 641                         goto err;
 642                         }
 643                 }
 644
 645         if(!(flags & CMS_DETACHED))
 646                 CMS_set_detached(cms, 0);
 647
 648         if ((flags & (CMS_STREAM|CMS_PARTIAL))
 649                 || CMS_final(cms, data, NULL, flags))
 650                 return cms;
 651         else
 652                 goto err;
 653
 654         merr:
 655         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 656         err:
 657         if (cms)
 658                 CMS_ContentInfo_free(cms);
 659         return NULL;
 660         }
 661
 662 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
 663                                                 EVP_PKEY *pk, X509 *cert)
 664         {
 665         int i;
 666         STACK_OF(CMS_RecipientEncryptedKey) *reks;
 667         CMS_RecipientEncryptedKey *rek;
 668         reks = CMS_RecipientInfo_kari_get0_reks(ri);
 669         if (!cert)
 670                 return 0;
 671         for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++)
 672                 {
 673                 int rv;
 674                 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
 675                 if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
 676                         continue;
 677                 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
 678                 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
 679                 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
 680                 if (rv > 0)
 681                         return 1;
 682                 return -1;
 683                 }
 684         return 0;
 685         }
 686
 687 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 688         {
 689         STACK_OF(CMS_RecipientInfo) *ris;
 690         CMS_RecipientInfo *ri;
 691         int i, r, ri_type;
 692         int debug = 0;
 693         ris = CMS_get0_RecipientInfos(cms);
 694         if (ris)
 695                 debug = cms->d.envelopedData->encryptedContentInfo->debug;
 696         ri_type = cms_pkey_get_ri_type(pk);
 697         if (ri_type == CMS_RECIPINFO_NONE)
 698                 {
 699                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 700                                         CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 701                 return 0;
 702                 }
 703
 704         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 705                 {
 706                 ri = sk_CMS_RecipientInfo_value(ris, i);
 707                 if (CMS_RecipientInfo_type(ri) != ri_type)
 708                                 continue;
 709                 if (ri_type == CMS_RECIPINFO_AGREE)
 710                         {
 711                         r = cms_kari_set1_pkey(cms, ri, pk, cert);
 712                         if (r > 0)
 713                                 return 1;
 714                         if (r < 0)
 715                                 return 0;
 716                         }
 717                 /* If we have a cert try matching RecipientInfo
 718                  * otherwise try them all.
 719                  */
 720                 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert))
 721                         {
 722                         CMS_RecipientInfo_set0_pkey(ri, pk);
 723                         r = CMS_RecipientInfo_decrypt(cms, ri);
 724                         CMS_RecipientInfo_set0_pkey(ri, NULL);
 725                         if (cert)
 726                                 {
 727                                 /* If not debugging clear any error and
 728                                  * return success to avoid leaking of
 729                                  * information useful to MMA
 730                                  */
 731                                 if (!debug)
 732                                         {
 733                                         ERR_clear_error();
 734                                         return 1;
 735                                         }
 736                                 if (r > 0)
 737                                         return 1;
 738                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 739                                                 CMS_R_DECRYPT_ERROR);
 740                                 return 0;
 741                                 }
 742                         /* If no cert and not debugging don't leave loop
 743                          * after first successful decrypt. Always attempt
 744                          * to decrypt all recipients to avoid leaking timing
 745                          * of a successful decrypt.
 746                          */
 747                         else if (r > 0 && debug)
 748                                 return 1;
 749                         }
 750                 }
 751         /* If no cert and not debugging always return success */
 752         if (!cert && !debug)
 753                 {
 754                 ERR_clear_error();
 755                 return 1;
 756                 }
 757
 758         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 759         return 0;
 760
 761         }
 762
 763 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 764                                 unsigned char *key, size_t keylen,
 765                                 unsigned char *id, size_t idlen)
 766         {
 767         STACK_OF(CMS_RecipientInfo) *ris;
 768         CMS_RecipientInfo *ri;
 769         int i, r;
 770         ris = CMS_get0_RecipientInfos(cms);
 771         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 772                 {
 773                 ri = sk_CMS_RecipientInfo_value(ris, i);
 774                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 775                                 continue;
 776
 777                 /* If we have an id try matching RecipientInfo
 778                  * otherwise try them all.
 779                  */
 780                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
 781                         {
 782                         CMS_RecipientInfo_set0_key(ri, key, keylen);
 783                         r = CMS_RecipientInfo_decrypt(cms, ri);
 784                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
 785                         if (r > 0)
 786                                 return 1;
 787                         if (id)
 788                                 {
 789                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
 790                                                 CMS_R_DECRYPT_ERROR);
 791                                 return 0;
 792                                 }
 793                         ERR_clear_error();
 794                         }
 795                 }
 796
 797         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 798         return 0;
 799
 800         }
 801
 802 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
 803                                 unsigned char *pass, ossl_ssize_t passlen)
 804         {
 805         STACK_OF(CMS_RecipientInfo) *ris;
 806         CMS_RecipientInfo *ri;
 807         int i, r;
 808         ris = CMS_get0_RecipientInfos(cms);
 809         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
 810                 {
 811                 ri = sk_CMS_RecipientInfo_value(ris, i);
 812                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
 813                                 continue;
 814                 CMS_RecipientInfo_set0_password(ri, pass, passlen);
 815                 r = CMS_RecipientInfo_decrypt(cms, ri);
 816                 CMS_RecipientInfo_set0_password(ri, NULL, 0);
 817                 if (r > 0)
 818                         return 1;
 819                 }
 820
 821         CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
 822         return 0;
 823
 824         }
 825
 826 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 827                                 BIO *dcont, BIO *out,
 828                                 unsigned int flags)
 829         {
 830         int r;
 831         BIO *cont;
 832         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
 833                 {
 834                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 835                 return 0;
 836                 }
 837         if (!dcont && !check_content(cms))
 838                 return 0;
 839         if (flags & CMS_DEBUG_DECRYPT)
 840                 cms->d.envelopedData->encryptedContentInfo->debug = 1;
 841         else
 842                 cms->d.envelopedData->encryptedContentInfo->debug = 0;
 843         if (!pk && !cert && !dcont && !out)
 844                 return 1;
 845         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 846                 return 0;
 847         cont = CMS_dataInit(cms, dcont);
 848         if (!cont)
 849                 return 0;
 850         r = cms_copy_content(out, cont, flags);
 851         do_free_upto(cont, dcont);
 852         return r;
 853         }
 854
 855 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
 856         {
 857         BIO *cmsbio;
 858         int ret = 0;
 859         if (!(cmsbio = CMS_dataInit(cms, dcont)))
 860                 {
 861                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
 862                 return 0;
 863                 }
 864
 865         SMIME_crlf_copy(data, cmsbio, flags);
 866
 867         (void)BIO_flush(cmsbio);
 868
 869
 870         if (!CMS_dataFinal(cms, cmsbio))
 871                 {
 872                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
 873                 goto err;
 874                 }
 875
 876         ret = 1;
 877
 878         err:
 879         do_free_upto(cmsbio, dcont);
 880
 881         return ret;
 882
 883         }
 884
 885 #ifdef ZLIB
 886
 887 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 888                                                         unsigned int flags)
 889         {
 890         BIO *cont;
 891         int r;
 892         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
 893                 {
 894                 CMSerr(CMS_F_CMS_UNCOMPRESS,
 895                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
 896                 return 0;
 897                 }
 898
 899         if (!dcont && !check_content(cms))
 900                 return 0;
 901
 902         cont = CMS_dataInit(cms, dcont);
 903         if (!cont)
 904                 return 0;
 905         r = cms_copy_content(out, cont, flags);
 906         do_free_upto(cont, dcont);
 907         return r;
 908         }
 909
 910 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 911         {
 912         CMS_ContentInfo *cms;
 913         if (comp_nid <= 0)
 914                 comp_nid = NID_zlib_compression;
 915         cms = cms_CompressedData_create(comp_nid);
 916         if (!cms)
 917                 return NULL;
 918
 919         if(!(flags & CMS_DETACHED))
 920                 CMS_set_detached(cms, 0);
 921
 922         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 923                 return cms;
 924
 925         CMS_ContentInfo_free(cms);
 926         return NULL;
 927         }
 928
 929 #else
 930
 931 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 932                                                         unsigned int flags)
 933         {
 934         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 935         return 0;
 936         }
 937
 938 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 939         {
 940         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 941         return NULL;
 942         }
 943
 944 #endif