2002-08-02 14:28:37 +00:00
|
|
|
/*
|
|
|
|
* Originally written by Bodo Moeller for the OpenSSL project.
|
|
|
|
*/
|
2001-03-05 20:13:37 +00:00
|
|
|
/* ====================================================================
|
2002-02-13 18:21:51 +00:00
|
|
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
|
2001-03-05 20:13:37 +00:00
|
|
|
*
|
|
|
|
* 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
|
2015-01-22 03:40:55 +00:00
|
|
|
* notice, this list of conditions and the following disclaimer.
|
2001-03-05 20:13:37 +00:00
|
|
|
*
|
|
|
|
* 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).
|
|
|
|
*
|
|
|
|
*/
|
2002-08-02 13:42:24 +00:00
|
|
|
/* ====================================================================
|
|
|
|
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
|
|
|
|
*
|
2015-01-22 03:40:55 +00:00
|
|
|
* Portions of the attached software ("Contribution") are developed by
|
2002-08-02 13:42:24 +00:00
|
|
|
* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
|
|
|
|
*
|
|
|
|
* The Contribution is licensed pursuant to the OpenSSL open source
|
|
|
|
* license provided above.
|
|
|
|
*
|
|
|
|
* The elliptic curve binary polynomial software is originally written by
|
|
|
|
* Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
|
|
|
|
*
|
|
|
|
*/
|
2001-03-05 20:13:37 +00:00
|
|
|
|
2002-10-28 13:23:24 +00:00
|
|
|
#include <openssl/err.h>
|
2001-03-05 20:13:37 +00:00
|
|
|
#include "ec_lcl.h"
|
2001-03-07 01:17:05 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
|
|
|
|
const BIGNUM *b, BN_CTX *ctx)
|
|
|
|
{
|
|
|
|
const EC_METHOD *meth;
|
|
|
|
EC_GROUP *ret;
|
2002-10-28 13:23:24 +00:00
|
|
|
|
2011-05-23 08:14:32 +00:00
|
|
|
#if defined(OPENSSL_BN_ASM_MONT)
|
2015-01-22 03:40:55 +00:00
|
|
|
/*
|
|
|
|
* This might appear controversial, but the fact is that generic
|
|
|
|
* prime method was observed to deliver better performance even
|
|
|
|
* for NIST primes on a range of platforms, e.g.: 60%-15%
|
|
|
|
* improvement on IA-64, ~25% on ARM, 30%-90% on P4, 20%-25%
|
|
|
|
* in 32-bit build and 35%--12% in 64-bit build on Core2...
|
|
|
|
* Coefficients are relative to optimized bn_nist.c for most
|
|
|
|
* intensive ECDSA verify and ECDH operations for 192- and 521-
|
|
|
|
* bit keys respectively. Choice of these boundary values is
|
|
|
|
* arguable, because the dependency of improvement coefficient
|
|
|
|
* from key length is not a "monotone" curve. For example while
|
|
|
|
* 571-bit result is 23% on ARM, 384-bit one is -1%. But it's
|
|
|
|
* generally faster, sometimes "respectfully" faster, sometimes
|
|
|
|
* "tolerably" slower... What effectively happens is that loop
|
|
|
|
* with bn_mul_add_words is put against bn_mul_mont, and the
|
|
|
|
* latter "wins" on short vectors. Correct solution should be
|
|
|
|
* implementing dedicated NxN multiplication subroutines for
|
|
|
|
* small N. But till it materializes, let's stick to generic
|
|
|
|
* prime method...
|
|
|
|
* <appro>
|
|
|
|
*/
|
|
|
|
meth = EC_GFp_mont_method();
|
2011-05-20 20:31:37 +00:00
|
|
|
#else
|
2015-01-22 03:40:55 +00:00
|
|
|
if (BN_nist_mod_func(p))
|
|
|
|
meth = EC_GFp_nist_method();
|
|
|
|
else
|
|
|
|
meth = EC_GFp_mont_method();
|
2011-05-20 20:31:37 +00:00
|
|
|
#endif
|
2001-03-07 01:17:05 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
ret = EC_GROUP_new(meth);
|
|
|
|
if (ret == NULL)
|
|
|
|
return NULL;
|
2001-03-07 01:17:05 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
if (!EC_GROUP_set_curve_GFp(ret, p, a, b, ctx)) {
|
|
|
|
EC_GROUP_clear_free(ret);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2002-08-02 13:42:24 +00:00
|
|
|
|
2011-02-12 17:23:32 +00:00
|
|
|
#ifndef OPENSSL_NO_EC2M
|
2015-01-22 03:40:55 +00:00
|
|
|
EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
|
|
|
|
const BIGNUM *b, BN_CTX *ctx)
|
|
|
|
{
|
|
|
|
const EC_METHOD *meth;
|
|
|
|
EC_GROUP *ret;
|
|
|
|
|
|
|
|
meth = EC_GF2m_simple_method();
|
|
|
|
|
|
|
|
ret = EC_GROUP_new(meth);
|
|
|
|
if (ret == NULL)
|
|
|
|
return NULL;
|
2002-08-02 13:42:24 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
if (!EC_GROUP_set_curve_GF2m(ret, p, a, b, ctx)) {
|
|
|
|
EC_GROUP_clear_free(ret);
|
|
|
|
return NULL;
|
|
|
|
}
|
2002-08-02 13:42:24 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
return ret;
|
|
|
|
}
|
2011-02-12 17:23:32 +00:00
|
|
|
#endif
|