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