/* crypto/evp/m_dss1.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved. 
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com). 
 * The implementation was written so as to conform with Netscapes SSL. 
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.   The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc.,  code; not just the SSL code.   The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed. 
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used. 
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package. 
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-). 
 * 4.  If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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. 
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.   i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.] 
 */

#include <stdio.h>
#include "cryptlib.h"

#ifndef OPENSSL_NO_SHA

# include <openssl/evp.h>
# include <openssl/objects.h>
# include <openssl/sha.h>
# ifndef OPENSSL_NO_DSA
#  include <openssl/dsa.h>
# endif

static int init(EVP_MD_CTX *ctx)
{
    return SHA1_Init(ctx->md_data);
}

static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
    return SHA1_Update(ctx->md_data, data, count);
}

static int final(EVP_MD_CTX *ctx, unsigned char *md)
{
    return SHA1_Final(md, ctx->md_data);
}

static const EVP_MD dss1_md = {
    NID_dsa,
    NID_dsaWithSHA1,
    SHA_DIGEST_LENGTH,
    EVP_MD_FLAG_PKEY_DIGEST,
    init,
    update,
    final,
    NULL,
    NULL,
    EVP_PKEY_DSA_method,
    SHA_CBLOCK,
    sizeof(EVP_MD *) + sizeof(SHA_CTX),
};

const EVP_MD *EVP_dss1(void)
{
    return (&dss1_md);
}
#endif
