crypto/openssl/crypto/cms/cms_dd.c

   1 /* crypto/cms/cms_dd.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/pem.h>
  57 #include <openssl/x509v3.h>
  58 #include <openssl/err.h>
  59 #include <openssl/cms.h>
  60 #include "cms_lcl.h"
  61
  62 DECLARE_ASN1_ITEM(CMS_DigestedData)
  63
  64 /* CMS DigestedData Utilities */
  65
  66 CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md)
  67         {
  68         CMS_ContentInfo *cms;
  69         CMS_DigestedData *dd;
  70         cms = CMS_ContentInfo_new();
  71         if (!cms)
  72                 return NULL;
  73
  74         dd = M_ASN1_new_of(CMS_DigestedData);
  75
  76         if (!dd)
  77                 goto err;
  78
  79         cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
  80         cms->d.digestedData = dd;
  81
  82         dd->version = 0;
  83         dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
  84
  85         cms_DigestAlgorithm_set(dd->digestAlgorithm, md);
  86
  87         return cms;
  88
  89         err:
  90
  91         if (cms)
  92                 CMS_ContentInfo_free(cms);
  93
  94         return NULL;
  95         }
  96
  97 BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms)
  98         {
  99         CMS_DigestedData *dd;
 100         dd = cms->d.digestedData;
 101         return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
 102         }
 103
 104 int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
 105         {
 106         EVP_MD_CTX mctx;
 107         unsigned char md[EVP_MAX_MD_SIZE];
 108         unsigned int mdlen;
 109         int r = 0;
 110         CMS_DigestedData *dd;
 111         EVP_MD_CTX_init(&mctx);
 112
 113         dd = cms->d.digestedData;
 114
 115         if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm))
 116                 goto err;
 117
 118         if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0)
 119                 goto err;
 120
 121         if (verify)
 122                 {
 123                 if (mdlen != (unsigned int)dd->digest->length)
 124                         {
 125                         CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
 126                                 CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
 127                         goto err;
 128                         }
 129
 130                 if (memcmp(md, dd->digest->data, mdlen))
 131                         CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
 132                                 CMS_R_VERIFICATION_FAILURE);
 133                 else
 134                         r = 1;
 135                 }
 136         else
 137                 {
 138                 if (!ASN1_STRING_set(dd->digest, md, mdlen))
 139                         goto err;
 140                 r = 1;
 141                 }
 142
 143         err:
 144         EVP_MD_CTX_cleanup(&mctx);
 145
 146         return r;
 147
 148         }