/* crypto/ec/ec_lib.c */
/*
* Originally written by Bodo Moeller for the OpenSSL project.
*/
/* ====================================================================
* 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).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* Binary polynomial ECC support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include <string.h>
#include <openssl/err.h>
#include <openssl/opensslv.h>
#include "ec_lcl.h"
const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
/* functions for EC_GROUP objects */
EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
{
EC_GROUP *ret;
if (meth == NULL)
{
ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL);
return NULL;
}
if (meth->group_init == 0)
{
ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return NULL;
}
ret = OPENSSL_malloc(sizeof *ret);
if (ret == NULL)
{
ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->meth = meth;
ret->extra_data = NULL;
ret->mont_data = NULL;
ret->generator = NULL;
BN_init(&ret->order);
BN_init(&ret->cofactor);
ret->curve_name = 0;
ret->asn1_flag = ~EC_GROUP_ASN1_FLAG_MASK;
ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
ret->seed = NULL;
ret->seed_len = 0;
if (!meth->group_init(ret))
{
OPENSSL_free(ret);
return NULL;
}
return ret;
}
void EC_GROUP_free(EC_GROUP *group)
{
if (!group) return;
if (group->meth->group_finish != 0)
group->meth->group_finish(group);
EC_EX_DATA_free_all_data(&group->extra_data);
if (EC_GROUP_VERSION(group) && group->mont_data)
BN_MONT_CTX_free(group->mont_data);
if (group->generator != NULL)
EC_POINT_free(group->generator);
BN_free(&group->order);
BN_free(&group-&g