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/* crypto/ec/ec_kmeth.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2015 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 <openssl/ec.h>
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include "ec_lcl.h"
static const EC_KEY_METHOD openssl_ec_key_method = {
"OpenSSL EC_KEY method",
0,
0,0,0,
ossl_ec_key_gen,
ossl_ecdh_compute_key
};
const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
{
return &openssl_ec_key_method;
}
const EC_KEY_METHOD *EC_KEY_get_default_method(void)
{
return default_ec_key_meth;
}
void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
{
if (meth == NULL)
default_ec_key_meth = &openssl_ec_key_method;
else
default_ec_key_meth = meth;
}
EC_KEY *EC_KEY_new_method(ENGINE *engine)
{
EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->meth = EC_KEY_get_default_method();
#ifndef OPENSSL_NO_ENGINE
if (engine) {
if (!ENGINE_init(engine)) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
OPENSSL_free(ret);
return NULL;
}
ret->engine = engine;
} else
ret->engine = ENGINE_get_default_EC_KEY();
if (ret->engine) {
ret->meth = ENGINE_get_EC_KEY(ret->engine);
if (!ret->meth) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
ENGINE_finish(ret->engine);
OPENSSL_free(ret);
return NULL;
}
}
#endif
ret->version = 1;
ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
ret->references = 1;
if (ret->meth->init && ret->meth->init(ret) == 0) {
EC_KEY_free(ret);
return NULL;
}
return ret;
}
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
EC_KEY *eckey,
void *(*KDF) (const void *in, size_t inlen, void *out,
size_t *outlen))
{
if (eckey->meth->compute_key)
return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
return 0;
}
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