/* fips_ecdsa_sign.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2011.
 */
/* ====================================================================
 * Copyright (c) 2011 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,
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#define OPENSSL_FIPSAPI

#include <string.h>
#include <openssl/evp.h>
#include <openssl/ecdsa.h>
#include <openssl/err.h>
#include <openssl/sha.h>
#include <openssl/bn.h>

ECDSA_SIG * FIPS_ecdsa_sign_ctx(EC_KEY *key, EVP_MD_CTX *ctx)
	{
	ECDSA_SIG *s;
	unsigned char dig[EVP_MAX_MD_SIZE];
	unsigned int dlen;
        FIPS_digestfinal(ctx, dig, &dlen);
	s = FIPS_ecdsa_sign_digest(key, dig, dlen);
	OPENSSL_cleanse(dig, dlen);
	return s;
	}

int FIPS_ecdsa_verify_ctx(EC_KEY *key, EVP_MD_CTX *ctx, ECDSA_SIG *s)
	{
	int ret=-1;
	unsigned char dig[EVP_MAX_MD_SIZE];
	unsigned int dlen;
        FIPS_digestfinal(ctx, dig, &dlen);
	ret = FIPS_ecdsa_verify_digest(key, dig, dlen, s);
	OPENSSL_cleanse(dig, dlen);
	return ret;
	}

int FIPS_ecdsa_verify(EC_KEY *key, const unsigned char *msg, size_t msglen,
			const EVP_MD *mhash, ECDSA_SIG *s)
	{
	int ret=-1;
	unsigned char dig[EVP_MAX_MD_SIZE];
	unsigned int dlen;
        FIPS_digest(msg, msglen, dig, &dlen, mhash);
	ret=FIPS_ecdsa_verify_digest(key, dig, dlen, s);
	OPENSSL_cleanse(dig, dlen);
	return ret;
	}

ECDSA_SIG * FIPS_ecdsa_sign(EC_KEY *key,
			const unsigned char *msg, size_t msglen,
			const EVP_MD *mhash)
	{
	ECDSA_SIG *s;
	unsigned char dig[EVP_MAX_MD_SIZE];
	unsigned int dlen;
        FIPS_digest(msg, msglen, dig, &dlen, mhash);
	s = FIPS_ecdsa_sign_digest(key, dig, dlen);
	OPENSSL_cleanse(dig, dlen);
	return s;
	}

