release/src/router/openssl/crypto/cms/cms_smime.c

   1 /* crypto/cms/cms_smime.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   4  * project.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  */
  54
  55 #include "cryptlib.h"
  56 #include <openssl/asn1t.h>
  57 #include <openssl/x509.h>
  58 #include <openssl/x509v3.h>
  59 #include <openssl/err.h>
  60 #include <openssl/cms.h>
  61 #include "cms_lcl.h"
  62 #include "asn1_locl.h"
  63
  64 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
  65 {
  66     unsigned char buf[4096];
  67     int r = 0, i;
  68     BIO *tmpout = NULL;
  69
  70     if (out == NULL)
  71         tmpout = BIO_new(BIO_s_null());
  72     else if (flags & CMS_TEXT) {
  73         tmpout = BIO_new(BIO_s_mem());
  74         BIO_set_mem_eof_return(tmpout, 0);
  75     } else
  76         tmpout = out;
  77
  78     if (!tmpout) {
  79         CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
  80         goto err;
  81     }
  82
  83     /* Read all content through chain to process digest, decrypt etc */
  84     for (;;) {
  85         i = BIO_read(in, buf, sizeof(buf));
  86         if (i <= 0) {
  87             if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
  88                 if (!BIO_get_cipher_status(in))
  89                     goto err;
  90             }
  91             if (i < 0)
  92                 goto err;
  93             break;
  94         }
  95
  96         if (tmpout && (BIO_write(tmpout, buf, i) != i))
  97             goto err;
  98     }
  99
 100     if (flags & CMS_TEXT) {
 101         if (!SMIME_text(tmpout, out)) {
 102             CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
 103             goto err;
 104         }
 105     }
 106
 107     r = 1;
 108
 109  err:
 110     if (tmpout && (tmpout != out))
 111         BIO_free(tmpout);
 112     return r;
 113
 114 }
 115
 116 static int check_content(CMS_ContentInfo *cms)
 117 {
 118     ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 119     if (!pos || !*pos) {
 120         CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
 121         return 0;
 122     }
 123     return 1;
 124 }
 125
 126 static void do_free_upto(BIO *f, BIO *upto)
 127 {
 128     if (upto) {
 129         BIO *tbio;
 130         do {
 131             tbio = BIO_pop(f);
 132             BIO_free(f);
 133             f = tbio;
 134         }
 135         while (f != upto);
 136     } else
 137         BIO_free_all(f);
 138 }
 139
 140 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
 141 {
 142     BIO *cont;
 143     int r;
 144     if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
 145         CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
 146         return 0;
 147     }
 148     cont = CMS_dataInit(cms, NULL);
 149     if (!cont)
 150         return 0;
 151     r = cms_copy_content(out, cont, flags);
 152     BIO_free_all(cont);
 153     return r;
 154 }
 155
 156 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
 157 {
 158     CMS_ContentInfo *cms;
 159     cms = cms_Data_create();
 160     if (!cms)
 161         return NULL;
 162
 163     if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 164         return cms;
 165
 166     CMS_ContentInfo_free(cms);
 167
 168     return NULL;
 169 }
 170
 171 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 172                       unsigned int flags)
 173 {
 174     BIO *cont;
 175     int r;
 176     if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
 177         CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
 178         return 0;
 179     }
 180
 181     if (!dcont && !check_content(cms))
 182         return 0;
 183
 184     cont = CMS_dataInit(cms, dcont);
 185     if (!cont)
 186         return 0;
 187     r = cms_copy_content(out, cont, flags);
 188     if (r)
 189         r = cms_DigestedData_do_final(cms, cont, 1);
 190     do_free_upto(cont, dcont);
 191     return r;
 192 }
 193
 194 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
 195                                    unsigned int flags)
 196 {
 197     CMS_ContentInfo *cms;
 198     if (!md)
 199         md = EVP_sha1();
 200     cms = cms_DigestedData_create(md);
 201     if (!cms)
 202         return NULL;
 203
 204     if (!(flags & CMS_DETACHED))
 205         CMS_set_detached(cms, 0);
 206
 207     if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 208         return cms;
 209
 210     CMS_ContentInfo_free(cms);
 211     return NULL;
 212 }
 213
 214 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
 215                               const unsigned char *key, size_t keylen,
 216                               BIO *dcont, BIO *out, unsigned int flags)
 217 {
 218     BIO *cont;
 219     int r;
 220     if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
 221         CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
 222                CMS_R_TYPE_NOT_ENCRYPTED_DATA);
 223         return 0;
 224     }
 225
 226     if (!dcont && !check_content(cms))
 227         return 0;
 228
 229     if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
 230         return 0;
 231     cont = CMS_dataInit(cms, dcont);
 232     if (!cont)
 233         return 0;
 234     r = cms_copy_content(out, cont, flags);
 235     do_free_upto(cont, dcont);
 236     return r;
 237 }
 238
 239 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
 240                                            const unsigned char *key,
 241                                            size_t keylen, unsigned int flags)
 242 {
 243     CMS_ContentInfo *cms;
 244     if (!cipher) {
 245         CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
 246         return NULL;
 247     }
 248     cms = CMS_ContentInfo_new();
 249     if (!cms)
 250         return NULL;
 251     if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
 252         return NULL;
 253
 254     if (!(flags & CMS_DETACHED))
 255         CMS_set_detached(cms, 0);
 256
 257     if ((flags & (CMS_STREAM | CMS_PARTIAL))
 258         || CMS_final(cms, in, NULL, flags))
 259         return cms;
 260
 261     CMS_ContentInfo_free(cms);
 262     return NULL;
 263 }
 264
 265 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
 266                                       X509_STORE *store,
 267                                       STACK_OF(X509) *certs,
 268                                       STACK_OF(X509_CRL) *crls,
 269                                       unsigned int flags)
 270 {
 271     X509_STORE_CTX ctx;
 272     X509 *signer;
 273     int i, j, r = 0;
 274     CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 275     if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) {
 276         CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
 277         goto err;
 278     }
 279     X509_STORE_CTX_set_default(&ctx, "smime_sign");
 280     if (crls)
 281         X509_STORE_CTX_set0_crls(&ctx, crls);
 282
 283     i = X509_verify_cert(&ctx);
 284     if (i <= 0) {
 285         j = X509_STORE_CTX_get_error(&ctx);
 286         CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
 287                CMS_R_CERTIFICATE_VERIFY_ERROR);
 288         ERR_add_error_data(2, "Verify error:",
 289                            X509_verify_cert_error_string(j));
 290         goto err;
 291     }
 292     r = 1;
 293  err:
 294     X509_STORE_CTX_cleanup(&ctx);
 295     return r;
 296
 297 }
 298
 299 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
 300                X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
 301 {
 302     CMS_SignerInfo *si;
 303     STACK_OF(CMS_SignerInfo) *sinfos;
 304     STACK_OF(X509) *cms_certs = NULL;
 305     STACK_OF(X509_CRL) *crls = NULL;
 306     X509 *signer;
 307     int i, scount = 0, ret = 0;
 308     BIO *cmsbio = NULL, *tmpin = NULL;
 309
 310     if (!dcont && !check_content(cms))
 311         return 0;
 312
 313     /* Attempt to find all signer certificates */
 314
 315     sinfos = CMS_get0_SignerInfos(cms);
 316
 317     if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
 318         CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
 319         goto err;
 320     }
 321
 322     for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
 323         si = sk_CMS_SignerInfo_value(sinfos, i);
 324         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
 325         if (signer)
 326             scount++;
 327     }
 328
 329     if (scount != sk_CMS_SignerInfo_num(sinfos))
 330         scount += CMS_set1_signers_certs(cms, certs, flags);
 331
 332     if (scount != sk_CMS_SignerInfo_num(sinfos)) {
 333         CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
 334         goto err;
 335     }
 336
 337     /* Attempt to verify all signers certs */
 338
 339     if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
 340         cms_certs = CMS_get1_certs(cms);
 341         if (!(flags & CMS_NOCRL))
 342             crls = CMS_get1_crls(cms);
 343         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
 344             si = sk_CMS_SignerInfo_value(sinfos, i);
 345             if (!cms_signerinfo_verify_cert(si, store,
 346                                             cms_certs, crls, flags))
 347                 goto err;
 348         }
 349     }
 350
 351     /* Attempt to verify all SignerInfo signed attribute signatures */
 352
 353     if (!(flags & CMS_NO_ATTR_VERIFY)) {
 354         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
 355             si = sk_CMS_SignerInfo_value(sinfos, i);
 356             if (CMS_signed_get_attr_count(si) < 0)
 357                 continue;
 358             if (CMS_SignerInfo_verify(si) <= 0)
 359                 goto err;
 360         }
 361     }
 362
 363     /*
 364      * Performance optimization: if the content is a memory BIO then store
 365      * its contents in a temporary read only memory BIO. This avoids
 366      * potentially large numbers of slow copies of data which will occur when
 367      * reading from a read write memory BIO when signatures are calculated.
 368      */
 369
 370     if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
 371         char *ptr;
 372         long len;
 373         len = BIO_get_mem_data(dcont, &ptr);
 374         tmpin = BIO_new_mem_buf(ptr, len);
 375         if (tmpin == NULL) {
 376             CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
 377             return 0;
 378         }
 379     } else
 380         tmpin = dcont;
 381
 382     cmsbio = CMS_dataInit(cms, tmpin);
 383     if (!cmsbio)
 384         goto err;
 385
 386     if (!cms_copy_content(out, cmsbio, flags))
 387         goto err;
 388
 389     if (!(flags & CMS_NO_CONTENT_VERIFY)) {
 390         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
 391             si = sk_CMS_SignerInfo_value(sinfos, i);
 392             if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
 393                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
 394                 goto err;
 395             }
 396         }
 397     }
 398
 399     ret = 1;
 400
 401  err:
 402
 403     if (dcont && (tmpin == dcont))
 404         do_free_upto(cmsbio, dcont);
 405     else
 406         BIO_free_all(cmsbio);
 407
 408     if (cms_certs)
 409         sk_X509_pop_free(cms_certs, X509_free);
 410     if (crls)
 411         sk_X509_CRL_pop_free(crls, X509_CRL_free);
 412
 413     return ret;
 414 }
 415
 416 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
 417                        STACK_OF(X509) *certs,
 418                        X509_STORE *store, unsigned int flags)
 419 {
 420     int r;
 421     flags &= ~(CMS_DETACHED | CMS_TEXT);
 422     r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
 423     if (r <= 0)
 424         return r;
 425     return cms_Receipt_verify(rcms, ocms);
 426 }
 427
 428 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
 429                           STACK_OF(X509) *certs, BIO *data,
 430                           unsigned int flags)
 431 {
 432     CMS_ContentInfo *cms;
 433     int i;
 434
 435     cms = CMS_ContentInfo_new();
 436     if (!cms || !CMS_SignedData_init(cms))
 437         goto merr;
 438
 439     if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
 440         CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
 441         goto err;
 442     }
 443
 444     for (i = 0; i < sk_X509_num(certs); i++) {
 445         X509 *x = sk_X509_value(certs, i);
 446         if (!CMS_add1_cert(cms, x))
 447             goto merr;
 448     }
 449
 450     if (!(flags & CMS_DETACHED))
 451         CMS_set_detached(cms, 0);
 452
 453     if ((flags & (CMS_STREAM | CMS_PARTIAL))
 454         || CMS_final(cms, data, NULL, flags))
 455         return cms;
 456     else
 457         goto err;
 458
 459  merr:
 460     CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
 461
 462  err:
 463     if (cms)
 464         CMS_ContentInfo_free(cms);
 465     return NULL;
 466 }
 467
 468 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
 469                                   X509 *signcert, EVP_PKEY *pkey,
 470                                   STACK_OF(X509) *certs, unsigned int flags)
 471 {
 472     CMS_SignerInfo *rct_si;
 473     CMS_ContentInfo *cms = NULL;
 474     ASN1_OCTET_STRING **pos, *os;
 475     BIO *rct_cont = NULL;
 476     int r = 0;
 477
 478     flags &= ~(CMS_STREAM | CMS_TEXT);
 479     /* Not really detached but avoids content being allocated */
 480     flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
 481     if (!pkey || !signcert) {
 482         CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
 483         return NULL;
 484     }
 485
 486     /* Initialize signed data */
 487
 488     cms = CMS_sign(NULL, NULL, certs, NULL, flags);
 489     if (!cms)
 490         goto err;
 491
 492     /* Set inner content type to signed receipt */
 493     if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
 494         goto err;
 495
 496     rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
 497     if (!rct_si) {
 498         CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
 499         goto err;
 500     }
 501
 502     os = cms_encode_Receipt(si);
 503
 504     if (!os)
 505         goto err;
 506
 507     /* Set content to digest */
 508     rct_cont = BIO_new_mem_buf(os->data, os->length);
 509     if (!rct_cont)
 510         goto err;
 511
 512     /* Add msgSigDigest attribute */
 513
 514     if (!cms_msgSigDigest_add1(rct_si, si))
 515         goto err;
 516
 517     /* Finalize structure */
 518     if (!CMS_final(cms, rct_cont, NULL, flags))
 519         goto err;
 520
 521     /* Set embedded content */
 522     pos = CMS_get0_content(cms);
 523     *pos = os;
 524
 525     r = 1;
 526
 527  err:
 528     if (rct_cont)
 529         BIO_free(rct_cont);
 530     if (r)
 531         return cms;
 532     CMS_ContentInfo_free(cms);
 533     return NULL;
 534
 535 }
 536
 537 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 538                              const EVP_CIPHER *cipher, unsigned int flags)
 539 {
 540     CMS_ContentInfo *cms;
 541     int i;
 542     X509 *recip;
 543     cms = CMS_EnvelopedData_create(cipher);
 544     if (!cms)
 545         goto merr;
 546     for (i = 0; i < sk_X509_num(certs); i++) {
 547         recip = sk_X509_value(certs, i);
 548         if (!CMS_add1_recipient_cert(cms, recip, flags)) {
 549             CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
 550             goto err;
 551         }
 552     }
 553
 554     if (!(flags & CMS_DETACHED))
 555         CMS_set_detached(cms, 0);
 556
 557     if ((flags & (CMS_STREAM | CMS_PARTIAL))
 558         || CMS_final(cms, data, NULL, flags))
 559         return cms;
 560     else
 561         goto err;
 562
 563  merr:
 564     CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
 565  err:
 566     if (cms)
 567         CMS_ContentInfo_free(cms);
 568     return NULL;
 569 }
 570
 571 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
 572                               EVP_PKEY *pk, X509 *cert)
 573 {
 574     int i;
 575     STACK_OF(CMS_RecipientEncryptedKey) *reks;
 576     CMS_RecipientEncryptedKey *rek;
 577     reks = CMS_RecipientInfo_kari_get0_reks(ri);
 578     if (!cert)
 579         return 0;
 580     for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
 581         int rv;
 582         rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
 583         if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
 584             continue;
 585         CMS_RecipientInfo_kari_set0_pkey(ri, pk);
 586         rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
 587         CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
 588         if (rv > 0)
 589             return 1;
 590         return -1;
 591     }
 592     return 0;
 593 }
 594
 595 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
 596 {
 597     STACK_OF(CMS_RecipientInfo) *ris;
 598     CMS_RecipientInfo *ri;
 599     int i, r, ri_type;
 600     int debug = 0, match_ri = 0;
 601     ris = CMS_get0_RecipientInfos(cms);
 602     if (ris)
 603         debug = cms->d.envelopedData->encryptedContentInfo->debug;
 604     ri_type = cms_pkey_get_ri_type(pk);
 605     if (ri_type == CMS_RECIPINFO_NONE) {
 606         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
 607                CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 608         return 0;
 609     }
 610
 611     for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
 612         ri = sk_CMS_RecipientInfo_value(ris, i);
 613         if (CMS_RecipientInfo_type(ri) != ri_type)
 614             continue;
 615         match_ri = 1;
 616         if (ri_type == CMS_RECIPINFO_AGREE) {
 617             r = cms_kari_set1_pkey(cms, ri, pk, cert);
 618             if (r > 0)
 619                 return 1;
 620             if (r < 0)
 621                 return 0;
 622         }
 623         /*
 624          * If we have a cert try matching RecipientInfo otherwise try them
 625          * all.
 626          */
 627         else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
 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 return success to
 634                  * avoid leaking of information useful to MMA
 635                  */
 636                 if (!debug) {
 637                     ERR_clear_error();
 638                     return 1;
 639                 }
 640                 if (r > 0)
 641                     return 1;
 642                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
 643                 return 0;
 644             }
 645             /*
 646              * If no cert and not debugging don't leave loop after first
 647              * successful decrypt. Always attempt to decrypt all recipients
 648              * to avoid leaking timing of a successful decrypt.
 649              */
 650             else if (r > 0 && debug)
 651                 return 1;
 652         }
 653     }
 654     /* If no cert and not debugging always return success */
 655     if (match_ri && !cert && !debug) {
 656         ERR_clear_error();
 657         return 1;
 658     }
 659
 660     CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
 661     return 0;
 662
 663 }
 664
 665 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
 666                          unsigned char *key, size_t keylen,
 667                          unsigned char *id, size_t idlen)
 668 {
 669     STACK_OF(CMS_RecipientInfo) *ris;
 670     CMS_RecipientInfo *ri;
 671     int i, r;
 672     ris = CMS_get0_RecipientInfos(cms);
 673     for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
 674         ri = sk_CMS_RecipientInfo_value(ris, i);
 675         if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
 676             continue;
 677
 678         /*
 679          * If we have an id try matching RecipientInfo otherwise try them
 680          * all.
 681          */
 682         if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
 683             CMS_RecipientInfo_set0_key(ri, key, keylen);
 684             r = CMS_RecipientInfo_decrypt(cms, ri);
 685             CMS_RecipientInfo_set0_key(ri, NULL, 0);
 686             if (r > 0)
 687                 return 1;
 688             if (id) {
 689                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
 690                 return 0;
 691             }
 692             ERR_clear_error();
 693         }
 694     }
 695
 696     CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
 697     return 0;
 698
 699 }
 700
 701 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
 702                               unsigned char *pass, ossl_ssize_t passlen)
 703 {
 704     STACK_OF(CMS_RecipientInfo) *ris;
 705     CMS_RecipientInfo *ri;
 706     int i, r;
 707     ris = CMS_get0_RecipientInfos(cms);
 708     for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
 709         ri = sk_CMS_RecipientInfo_value(ris, i);
 710         if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
 711             continue;
 712         CMS_RecipientInfo_set0_password(ri, pass, passlen);
 713         r = CMS_RecipientInfo_decrypt(cms, ri);
 714         CMS_RecipientInfo_set0_password(ri, NULL, 0);
 715         if (r > 0)
 716             return 1;
 717     }
 718
 719     CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
 720     return 0;
 721
 722 }
 723
 724 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
 725                 BIO *dcont, BIO *out, unsigned int flags)
 726 {
 727     int r;
 728     BIO *cont;
 729     if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
 730         CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
 731         return 0;
 732     }
 733     if (!dcont && !check_content(cms))
 734         return 0;
 735     if (flags & CMS_DEBUG_DECRYPT)
 736         cms->d.envelopedData->encryptedContentInfo->debug = 1;
 737     else
 738         cms->d.envelopedData->encryptedContentInfo->debug = 0;
 739     if (!pk && !cert && !dcont && !out)
 740         return 1;
 741     if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
 742         return 0;
 743     cont = CMS_dataInit(cms, dcont);
 744     if (!cont)
 745         return 0;
 746     r = cms_copy_content(out, cont, flags);
 747     do_free_upto(cont, dcont);
 748     return r;
 749 }
 750
 751 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
 752 {
 753     BIO *cmsbio;
 754     int ret = 0;
 755     if (!(cmsbio = CMS_dataInit(cms, dcont))) {
 756         CMSerr(CMS_F_CMS_FINAL, ERR_R_MALLOC_FAILURE);
 757         return 0;
 758     }
 759
 760     SMIME_crlf_copy(data, cmsbio, flags);
 761
 762     (void)BIO_flush(cmsbio);
 763
 764     if (!CMS_dataFinal(cms, cmsbio)) {
 765         CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
 766         goto err;
 767     }
 768
 769     ret = 1;
 770
 771  err:
 772     do_free_upto(cmsbio, dcont);
 773
 774     return ret;
 775
 776 }
 777
 778 #ifdef ZLIB
 779
 780 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 781                    unsigned int flags)
 782 {
 783     BIO *cont;
 784     int r;
 785     if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
 786         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
 787         return 0;
 788     }
 789
 790     if (!dcont && !check_content(cms))
 791         return 0;
 792
 793     cont = CMS_dataInit(cms, dcont);
 794     if (!cont)
 795         return 0;
 796     r = cms_copy_content(out, cont, flags);
 797     do_free_upto(cont, dcont);
 798     return r;
 799 }
 800
 801 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 802 {
 803     CMS_ContentInfo *cms;
 804     if (comp_nid <= 0)
 805         comp_nid = NID_zlib_compression;
 806     cms = cms_CompressedData_create(comp_nid);
 807     if (!cms)
 808         return NULL;
 809
 810     if (!(flags & CMS_DETACHED))
 811         CMS_set_detached(cms, 0);
 812
 813     if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
 814         return cms;
 815
 816     CMS_ContentInfo_free(cms);
 817     return NULL;
 818 }
 819
 820 #else
 821
 822 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
 823                    unsigned int flags)
 824 {
 825     CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 826     return 0;
 827 }
 828
 829 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
 830 {
 831     CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 832     return NULL;
 833 }
 834
 835 #endif