Line data    Source code

       1             : /* crypto/cms/cms_dd.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/pem.h>
      58             : #include <openssl/x509v3.h>
      59             : #include <openssl/err.h>
      60             : #include <openssl/cms.h>
      61             : #include "cms_lcl.h"
      62             : 
      63             : DECLARE_ASN1_ITEM(CMS_DigestedData)
      64             : 
      65             : /* CMS DigestedData Utilities */
      66             : 
      67           0 : CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md)
      68             : {
      69             :     CMS_ContentInfo *cms;
      70             :     CMS_DigestedData *dd;
      71           0 :     cms = CMS_ContentInfo_new();
      72           0 :     if (!cms)
      73             :         return NULL;
      74             : 
      75           0 :     dd = M_ASN1_new_of(CMS_DigestedData);
      76             : 
      77           0 :     if (!dd)
      78             :         goto err;
      79             : 
      80           0 :     cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
      81           0 :     cms->d.digestedData = dd;
      82             : 
      83           0 :     dd->version = 0;
      84           0 :     dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
      85             : 
      86           0 :     cms_DigestAlgorithm_set(dd->digestAlgorithm, md);
      87             : 
      88           0 :     return cms;
      89             : 
      90             :  err:
      91             : 
      92           0 :     if (cms)
      93           0 :         CMS_ContentInfo_free(cms);
      94             : 
      95             :     return NULL;
      96             : }
      97             : 
      98           0 : BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms)
      99             : {
     100             :     CMS_DigestedData *dd;
     101           0 :     dd = cms->d.digestedData;
     102           0 :     return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
     103             : }
     104             : 
     105           0 : int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
     106             : {
     107             :     EVP_MD_CTX mctx;
     108             :     unsigned char md[EVP_MAX_MD_SIZE];
     109             :     unsigned int mdlen;
     110             :     int r = 0;
     111             :     CMS_DigestedData *dd;
     112           0 :     EVP_MD_CTX_init(&mctx);
     113             : 
     114           0 :     dd = cms->d.digestedData;
     115             : 
     116           0 :     if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm))
     117             :         goto err;
     118             : 
     119           0 :     if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0)
     120             :         goto err;
     121             : 
     122           0 :     if (verify) {
     123           0 :         if (mdlen != (unsigned int)dd->digest->length) {
     124           0 :             CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
     125             :                    CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
     126           0 :             goto err;
     127             :         }
     128             : 
     129           0 :         if (memcmp(md, dd->digest->data, mdlen))
     130           0 :             CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
     131             :                    CMS_R_VERIFICATION_FAILURE);
     132             :         else
     133             :             r = 1;
     134             :     } else {
     135           0 :         if (!ASN1_STRING_set(dd->digest, md, mdlen))
     136             :             goto err;
     137             :         r = 1;
     138             :     }
     139             : 
     140             :  err:
     141           0 :     EVP_MD_CTX_cleanup(&mctx);
     142             : 
     143           0 :     return r;
     144             : 
     145             : }