[thirdparty/openssl.git] / crypto / ec / ecp_nist.c

/* crypto/ec/ecp_nist.c */
/*
 * Written by Nils Larsch 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.
 * Portions of this software developed by SUN MICROSYSTEMS, INC.,
 * and contributed to the OpenSSL project.
 */


#include <limits.h>

#include <openssl/err.h>
#include <openssl/obj_mac.h>
#include "ec_lcl.h"

const EC_METHOD *EC_GFp_nist_method(void)
	{
	static const EC_METHOD ret = {
		EC_FLAGS_DEFAULT_OCT,
		NID_X9_62_prime_field,
		ec_GFp_simple_group_init,
		ec_GFp_simple_group_finish,
		ec_GFp_simple_group_clear_finish,
		ec_GFp_nist_group_copy,
		ec_GFp_nist_group_set_curve,
		ec_GFp_simple_group_get_curve,
		ec_GFp_simple_group_get_degree,
		ec_GFp_simple_group_check_discriminant,
		ec_GFp_simple_point_init,
		ec_GFp_simple_point_finish,
		ec_GFp_simple_point_clear_finish,
		ec_GFp_simple_point_copy,
		ec_GFp_simple_point_set_to_infinity,
		ec_GFp_simple_set_Jprojective_coordinates_GFp,
		ec_GFp_simple_get_Jprojective_coordinates_GFp,
		ec_GFp_simple_point_set_affine_coordinates,
		ec_GFp_simple_point_get_affine_coordinates,
		0,0,0,
		ec_GFp_simple_add,
		ec_GFp_simple_dbl,
		ec_GFp_simple_invert,
		ec_GFp_simple_is_at_infinity,
		ec_GFp_simple_is_on_curve,
		ec_GFp_simple_cmp,
		ec_GFp_simple_make_affine,
		ec_GFp_simple_points_make_affine,
		0 /* mul */,
		0 /* precompute_mult */,
		0 /* have_precompute_mult */,	
		ec_GFp_nist_field_mul,
		ec_GFp_nist_field_sqr,
		0 /* field_div */,
		0 /* field_encode */,
		0 /* field_decode */,
		0 /* field_set_to_one */ };

	return &ret;
	}

int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src)
	{
	dest->field_mod_func = src->field_mod_func;

	return ec_GFp_simple_group_copy(dest, src);
	}

int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p,
	const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
	{
	int ret = 0;
	BN_CTX *new_ctx = NULL;
	
	if (ctx == NULL)
		if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0;

	BN_CTX_start(ctx);

	if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
		group->field_mod_func = BN_nist_mod_192;
	else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
		group->field_mod_func = BN_nist_mod_224;
	else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
		group->field_mod_func = BN_nist_mod_256;
	else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
		group->field_mod_func = BN_nist_mod_384;
	else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
		group->field_mod_func = BN_nist_mod_521;
	else
		{
		ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
		goto err;
		}

	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);

 err:
	BN_CTX_end(ctx);
	if (new_ctx != NULL)
		BN_CTX_free(new_ctx);
	return ret;
	}


int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
	const BIGNUM *b, BN_CTX *ctx)
	{
	int	ret=0;
	BN_CTX	*ctx_new=NULL;

	if (!group || !r || !a || !b)
		{
		ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
		goto err;
		}
	if (!ctx)
		if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;

	if (!BN_mul(r, a, b, ctx)) goto err;
	if (!group->field_mod_func(r, r, &group->field, ctx))
		goto err;

	ret=1;
err:
	if (ctx_new)
		BN_CTX_free(ctx_new);
	return ret;
	}


int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
	BN_CTX *ctx)
	{
	int	ret=0;
	BN_CTX	*ctx_new=NULL;

	if (!group || !r || !a)
		{
		ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
		goto err;
		}
	if (!ctx)
		if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;

	if (!BN_sqr(r, a, ctx)) goto err;
	if (!group->field_mod_func(r, r, &group->field, ctx))
		goto err;

	ret=1;
err:
	if (ctx_new)
		BN_CTX_free(ctx_new);
	return ret;
	}
Commit	Line	Data
38e3c581	1	/* crypto/ec/ecp_nist.c */
5c6bf031 BM	2	/*
	3	* Written by Nils Larsch for the OpenSSL project.
	4	*/
38e3c581	5	/* ====================================================================
bd1217a1	6	* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
38e3c581 BM	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* openssl-core@openssl.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*
	53	* This product includes cryptographic software written by Eric Young
	54	* (eay@cryptsoft.com). This product includes software written by Tim
	55	* Hudson (tjh@cryptsoft.com).
	56	*
	57	*/
7793f30e BM	58	/* ====================================================================
	59	* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
	60	* Portions of this software developed by SUN MICROSYSTEMS, INC.,
	61	* and contributed to the OpenSSL project.
	62	*/
38e3c581	63
73e45b2d	64
84b08eee	65
37942fab NL	66	#include <limits.h>
37942fab NL	67
5c6bf031 BM	68	#include <openssl/err.h>
5c6bf031 BM	69	#include <openssl/obj_mac.h>
38e3c581	70	#include "ec_lcl.h"
0657bf9c	71
0657bf9c BM	72	const EC_METHOD *EC_GFp_nist_method(void)
0657bf9c BM	73	{
58fc6229	74	static const EC_METHOD ret = {
84b08eee	75	EC_FLAGS_DEFAULT_OCT,
5c6bf031	76	NID_X9_62_prime_field,
a2dbcf36 BM	77	ec_GFp_simple_group_init,
	78	ec_GFp_simple_group_finish,
	79	ec_GFp_simple_group_clear_finish,
e2c9c91b	80	ec_GFp_nist_group_copy,
35b73a1f BM	81	ec_GFp_nist_group_set_curve,
35b73a1f BM	82	ec_GFp_simple_group_get_curve,
7793f30e	83	ec_GFp_simple_group_get_degree,
17d6bb81	84	ec_GFp_simple_group_check_discriminant,
58fc6229 BM	85	ec_GFp_simple_point_init,
	86	ec_GFp_simple_point_finish,
	87	ec_GFp_simple_point_clear_finish,
	88	ec_GFp_simple_point_copy,
226cc7de	89	ec_GFp_simple_point_set_to_infinity,
1d5bd6cf BM	90	ec_GFp_simple_set_Jprojective_coordinates_GFp,
1d5bd6cf BM	91	ec_GFp_simple_get_Jprojective_coordinates_GFp,
35b73a1f BM	92	ec_GFp_simple_point_set_affine_coordinates,
35b73a1f BM	93	ec_GFp_simple_point_get_affine_coordinates,
84b08eee	94	0,0,0,
58fc6229 BM	95	ec_GFp_simple_add,
58fc6229 BM	96	ec_GFp_simple_dbl,
1d5bd6cf	97	ec_GFp_simple_invert,
58fc6229 BM	98	ec_GFp_simple_is_at_infinity,
58fc6229 BM	99	ec_GFp_simple_is_on_curve,
1d5bd6cf	100	ec_GFp_simple_cmp,
58fc6229	101	ec_GFp_simple_make_affine,
48fe4d62	102	ec_GFp_simple_points_make_affine,
37c660ff BM	103	0 /* mul */,
	104	0 /* precompute_mult */,
	105	0 /* have_precompute_mult */,
60428dbf	106	ec_GFp_nist_field_mul,
58fc6229	107	ec_GFp_nist_field_sqr,
7793f30e	108	0 /* field_div */,
156e8557	109	0 /* field_encode */,
48fe4d62 BM	110	0 /* field_decode */,
48fe4d62 BM	111	0 /* field_set_to_one */ };
0657bf9c BM	112
	113	return &ret;
	114	}
60428dbf	115
e2c9c91b BM	116	int ec_GFp_nist_group_copy(EC_GROUP dest, const EC_GROUP src)
	117	{
	118	dest->field_mod_func = src->field_mod_func;
	119
	120	return ec_GFp_simple_group_copy(dest, src);
	121	}
5c6bf031 BM	122
	123	int ec_GFp_nist_group_set_curve(EC_GROUP group, const BIGNUM p,
	124	const BIGNUM a, const BIGNUM b, BN_CTX *ctx)
	125	{
	126	int ret = 0;
	127	BN_CTX *new_ctx = NULL;
5c6bf031 BM	128
	129	if (ctx == NULL)
	130	if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0;
	131
	132	BN_CTX_start(ctx);
5c6bf031 BM	133
5c6bf031 BM	134	if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
19b8d06a	135	group->field_mod_func = BN_nist_mod_192;
5c6bf031	136	else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
19b8d06a	137	group->field_mod_func = BN_nist_mod_224;
5c6bf031	138	else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
19b8d06a	139	group->field_mod_func = BN_nist_mod_256;
5c6bf031	140	else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
19b8d06a	141	group->field_mod_func = BN_nist_mod_384;
5c6bf031	142	else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
19b8d06a	143	group->field_mod_func = BN_nist_mod_521;
5c6bf031 BM	144	else
5c6bf031 BM	145	{
aa4ce731	146	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
5c6bf031 BM	147	goto err;
	148	}
	149
bd1217a1	150	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
5c6bf031 BM	151
	152	err:
	153	BN_CTX_end(ctx);
	154	if (new_ctx != NULL)
	155	BN_CTX_free(new_ctx);
	156	return ret;
	157	}
	158
a2dbcf36	159
5c6bf031 BM	160	int ec_GFp_nist_field_mul(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
	161	const BIGNUM b, BN_CTX ctx)
	162	{
	163	int ret=0;
	164	BN_CTX *ctx_new=NULL;
60428dbf	165
5c6bf031 BM	166	if (!group \|\| !r \|\| !a \|\| !b)
	167	{
	168	ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
	169	goto err;
	170	}
	171	if (!ctx)
	172	if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
60428dbf	173
5c6bf031	174	if (!BN_mul(r, a, b, ctx)) goto err;
19b8d06a	175	if (!group->field_mod_func(r, r, &group->field, ctx))
5c6bf031	176	goto err;
60428dbf	177
5c6bf031 BM	178	ret=1;
	179	err:
	180	if (ctx_new)
	181	BN_CTX_free(ctx_new);
	182	return ret;
	183	}
60428dbf	184
a2dbcf36	185
5c6bf031 BM	186	int ec_GFp_nist_field_sqr(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
	187	BN_CTX *ctx)
	188	{
	189	int ret=0;
	190	BN_CTX *ctx_new=NULL;
60428dbf	191
5c6bf031 BM	192	if (!group \|\| !r \|\| !a)
	193	{
	194	ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
	195	goto err;
	196	}
	197	if (!ctx)
	198	if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
60428dbf	199
5c6bf031	200	if (!BN_sqr(r, a, ctx)) goto err;
19b8d06a	201	if (!group->field_mod_func(r, r, &group->field, ctx))
5c6bf031	202	goto err;
60428dbf	203
5c6bf031 BM	204	ret=1;
	205	err:
	206	if (ctx_new)
	207	BN_CTX_free(ctx_new);
	208	return ret;
	209	}