/* $OpenBSD: ecs_sign.c,v 1.9 2022/01/27 20:30:29 tb Exp $ */

/* ====================================================================

 * Copyright (c) 1998-2002 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

 *    openssl-core@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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_ENGINE

#include <openssl/engine.h>

#endif

#include <openssl/err.h>

#include <openssl/evp.h>

#include "bn_lcl.h"

#include "ecs_locl.h"

#include "ec_lcl.h"

ECDSA_SIG *

ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)

{

  return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);

}

ECDSA_SIG *

ECDSA_do_sign_ex(const unsigned char *dgst, int dlen, const BIGNUM *kinv,

    const BIGNUM *rp, EC_KEY *eckey)

{

  if (eckey->meth->sign_sig != NULL)

    return eckey->meth->sign_sig(dgst, dlen, kinv, rp, eckey);

  ECDSAerror(EVP_R_METHOD_NOT_SUPPORTED);

  return 0;

}

int

ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,

    unsigned int *siglen, EC_KEY *eckey)

{

  return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);

}

int

ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char *sig,

    unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)

{

  if (eckey->meth->sign != NULL)

    return eckey->meth->sign(type, dgst, dlen, sig, siglen, kinv, r, eckey);

  ECDSAerror(EVP_R_METHOD_NOT_SUPPORTED);

  return 0;

}

int

ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)

{

  if (eckey->meth->sign_setup != NULL)

    return eckey->meth->sign_setup(eckey, ctx_in, kinvp, rp);

  ECDSAerror(EVP_R_METHOD_NOT_SUPPORTED);

  return 0;

}