/* $OpenBSD: ech_lib.c,v 1.24 2023/07/07 13:54:45 beck Exp $ */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
 * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
 * to the OpenSSL project.
 *
 * The ECC Code is licensed pursuant to the OpenSSL open source
 * license provided below.
 *
 * The ECDH software is originally written by Douglas Stebila of
 * Sun Microsystems Laboratories.
 *
 */
/* ====================================================================
 * Copyright (c) 1998-2003 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 <string.h>

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>

#include "ec_local.h"

struct ecdh_method {
	const char *name;
	int (*compute_key)(void *key, size_t outlen, const EC_POINT *pub_key, EC_KEY *ecdh,
	    void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen));
	int flags;
	char *app_data;
};

static const ECDH_METHOD *default_ECDH_method = NULL;

static const ECDH_METHOD openssl_ecdh_meth = {
	.name = "OpenSSL ECDH method",
	.compute_key = ecdh_compute_key,
};

const ECDH_METHOD *
ECDH_OpenSSL(void)
{
	return &openssl_ecdh_meth;
}
LCRYPTO_ALIAS(ECDH_OpenSSL);

void
ECDH_set_default_method(const ECDH_METHOD *meth)
{
	default_ECDH_method = meth;
}
LCRYPTO_ALIAS(ECDH_set_default_method);

const ECDH_METHOD *
ECDH_get_default_method(void)
{
	if (!default_ECDH_method) {
		default_ECDH_method = ECDH_OpenSSL();
	}
	return default_ECDH_method;
}
LCRYPTO_ALIAS(ECDH_get_default_method);

int
ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
{
	return 0;
}
LCRYPTO_ALIAS(ECDH_set_method);

int
ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
	return -1;
}
LCRYPTO_ALIAS(ECDH_get_ex_new_index);

int
ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
{
	return 0;
}
LCRYPTO_ALIAS(ECDH_set_ex_data);

void *
ECDH_get_ex_data(EC_KEY *d, int idx)
{
	return NULL;
}
LCRYPTO_ALIAS(ECDH_get_ex_data);