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/* crypto/cms/cms_dd.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*/
#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/cms.h>
#include "cms_lcl.h"
DECLARE_ASN1_ITEM(CMS_DigestedData)
/* CMS DigestedData Utilities */
CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md)
{
CMS_ContentInfo *cms;
CMS_DigestedData *dd;
cms = CMS_ContentInfo_new();
if (!cms)
return NULL;
dd = M_ASN1_new_of(CMS_DigestedData);
if (!dd)
goto err;
cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
cms->d.digestedData = dd;
dd->version = 0;
dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
cms_DigestAlgorithm_set(dd->digestAlgorithm, md);
return cms;
err:
if (cms)
CMS_ContentInfo_free(cms);
return NULL;
}
BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms)
{
CMS_DigestedData *dd;
dd = cms->d.digestedData;
return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
}
int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
{
EVP_MD_CTX mctx;
unsigned char md[EVP_MAX_MD_SIZE];
unsigned int mdlen;
int r = 0;
CMS_DigestedData *dd;
EVP_MD_CTX_init(&mctx);
dd = cms->d.digestedData;
if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm))
goto err;
if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0)
goto err;
if (verify)
{
if (mdlen != (unsigned int)dd->digest->length)
{
CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
goto err;
}
if (memcmp(md, dd->digest->data, mdlen))
CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
CMS_R_VERIFICATION_FAILURE);
else
r = 1;
}
else
{
if (!ASN1_STRING_set(dd->digest, md, mdlen))
goto err;
r = 1;
}
err:
EVP_MD_CTX_cleanup(&mctx);
return r;
}