[thirdparty/openssl.git] / 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_group_simple_order_bits,
        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 */
        ec_key_simple_priv2oct,
        ec_key_simple_oct2priv,
        0, /* set private */
        ec_key_simple_generate_key,
        ec_key_simple_check_key,
        ec_key_simple_generate_public_key,
        0, /* keycopy */
        0, /* keyfinish */
        ecdh_simple_compute_key
    };

    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);
    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:
    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:
    BN_CTX_free(ctx_new);
    return ret;
}
Commit	Line	Data
5c6bf031 BM	1	/*
	2	* Written by Nils Larsch for the OpenSSL project.
	3	*/
38e3c581	4	/* ====================================================================
bd1217a1	5	* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
38e3c581 BM	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
0f113f3e	12	* notice, this list of conditions and the following disclaimer.
38e3c581 BM	13	*
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	*
	19	* 3. All advertising materials mentioning features or use of this
	20	* software must display the following acknowledgment:
	21	* "This product includes software developed by the OpenSSL Project
	22	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	23	*
	24	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	25	* endorse or promote products derived from this software without
	26	* prior written permission. For written permission, please contact
	27	* openssl-core@openssl.org.
	28	*
	29	* 5. Products derived from this software may not be called "OpenSSL"
	30	* nor may "OpenSSL" appear in their names without prior written
	31	* permission of the OpenSSL Project.
	32	*
	33	* 6. Redistributions of any form whatsoever must retain the following
	34	* acknowledgment:
	35	* "This product includes software developed by the OpenSSL Project
	36	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	37	*
	38	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	39	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	40	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	41	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	42	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	43	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	44	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	45	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	46	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	47	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	48	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	49	* OF THE POSSIBILITY OF SUCH DAMAGE.
	50	* ====================================================================
	51	*
	52	* This product includes cryptographic software written by Eric Young
	53	* (eay@cryptsoft.com). This product includes software written by Tim
	54	* Hudson (tjh@cryptsoft.com).
	55	*
	56	*/
7793f30e BM	57	/* ====================================================================
	58	* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
	59	* Portions of this software developed by SUN MICROSYSTEMS, INC.,
	60	* and contributed to the OpenSSL project.
	61	*/
38e3c581	62
37942fab NL	63	#include <limits.h>
37942fab NL	64
5c6bf031 BM	65	#include <openssl/err.h>
5c6bf031 BM	66	#include <openssl/obj_mac.h>
38e3c581	67	#include "ec_lcl.h"
0657bf9c	68
0657bf9c	69	const EC_METHOD *EC_GFp_nist_method(void)
0f113f3e MC	70	{
	71	static const EC_METHOD ret = {
	72	EC_FLAGS_DEFAULT_OCT,
	73	NID_X9_62_prime_field,
	74	ec_GFp_simple_group_init,
	75	ec_GFp_simple_group_finish,
	76	ec_GFp_simple_group_clear_finish,
	77	ec_GFp_nist_group_copy,
	78	ec_GFp_nist_group_set_curve,
	79	ec_GFp_simple_group_get_curve,
	80	ec_GFp_simple_group_get_degree,
9ff9bccc	81	ec_group_simple_order_bits,
0f113f3e MC	82	ec_GFp_simple_group_check_discriminant,
	83	ec_GFp_simple_point_init,
	84	ec_GFp_simple_point_finish,
	85	ec_GFp_simple_point_clear_finish,
	86	ec_GFp_simple_point_copy,
	87	ec_GFp_simple_point_set_to_infinity,
	88	ec_GFp_simple_set_Jprojective_coordinates_GFp,
	89	ec_GFp_simple_get_Jprojective_coordinates_GFp,
	90	ec_GFp_simple_point_set_affine_coordinates,
	91	ec_GFp_simple_point_get_affine_coordinates,
	92	0, 0, 0,
	93	ec_GFp_simple_add,
	94	ec_GFp_simple_dbl,
	95	ec_GFp_simple_invert,
	96	ec_GFp_simple_is_at_infinity,
	97	ec_GFp_simple_is_on_curve,
	98	ec_GFp_simple_cmp,
	99	ec_GFp_simple_make_affine,
	100	ec_GFp_simple_points_make_affine,
	101	0 /* mul */ ,
	102	0 /* precompute_mult */ ,
	103	0 /* have_precompute_mult */ ,
	104	ec_GFp_nist_field_mul,
	105	ec_GFp_nist_field_sqr,
	106	0 /* field_div */ ,
	107	0 /* field_encode */ ,
	108	0 /* field_decode */ ,
9ff9bccc DSH	109	0, /* field_set_to_one */
	110	ec_key_simple_priv2oct,
	111	ec_key_simple_oct2priv,
	112	0, /* set private */
	113	ec_key_simple_generate_key,
	114	ec_key_simple_check_key,
	115	ec_key_simple_generate_public_key,
	116	0, /* keycopy */
	117	0, /* keyfinish */
	118	ecdh_simple_compute_key
0f113f3e MC	119	};
	120
	121	return &ret;
	122	}
60428dbf	123
e2c9c91b	124	int ec_GFp_nist_group_copy(EC_GROUP dest, const EC_GROUP src)
0f113f3e MC	125	{
0f113f3e MC	126	dest->field_mod_func = src->field_mod_func;
e2c9c91b	127
0f113f3e MC	128	return ec_GFp_simple_group_copy(dest, src);
0f113f3e MC	129	}
5c6bf031 BM	130
5c6bf031 BM	131	int ec_GFp_nist_group_set_curve(EC_GROUP group, const BIGNUM p,
0f113f3e MC	132	const BIGNUM a, const BIGNUM b, BN_CTX *ctx)
	133	{
	134	int ret = 0;
	135	BN_CTX *new_ctx = NULL;
	136
	137	if (ctx == NULL)
	138	if ((ctx = new_ctx = BN_CTX_new()) == NULL)
	139	return 0;
	140
	141	BN_CTX_start(ctx);
	142
	143	if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
	144	group->field_mod_func = BN_nist_mod_192;
	145	else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
	146	group->field_mod_func = BN_nist_mod_224;
	147	else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
	148	group->field_mod_func = BN_nist_mod_256;
	149	else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
	150	group->field_mod_func = BN_nist_mod_384;
	151	else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
	152	group->field_mod_func = BN_nist_mod_521;
	153	else {
	154	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
	155	goto err;
	156	}
	157
	158	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
5c6bf031 BM	159
5c6bf031 BM	160	err:
0f113f3e	161	BN_CTX_end(ctx);
23a1d5e9	162	BN_CTX_free(new_ctx);
0f113f3e MC	163	return ret;
0f113f3e MC	164	}
a2dbcf36	165
5c6bf031	166	int ec_GFp_nist_field_mul(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
0f113f3e MC	167	const BIGNUM b, BN_CTX ctx)
	168	{
	169	int ret = 0;
	170	BN_CTX *ctx_new = NULL;
	171
	172	if (!group \|\| !r \|\| !a \|\| !b) {
	173	ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
	174	goto err;
	175	}
	176	if (!ctx)
	177	if ((ctx_new = ctx = BN_CTX_new()) == NULL)
	178	goto err;
	179
	180	if (!BN_mul(r, a, b, ctx))
	181	goto err;
	182	if (!group->field_mod_func(r, r, group->field, ctx))
	183	goto err;
	184
	185	ret = 1;
	186	err:
23a1d5e9	187	BN_CTX_free(ctx_new);
0f113f3e MC	188	return ret;
0f113f3e MC	189	}
a2dbcf36	190
5c6bf031	191	int ec_GFp_nist_field_sqr(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
0f113f3e MC	192	BN_CTX *ctx)
	193	{
	194	int ret = 0;
	195	BN_CTX *ctx_new = NULL;
	196
	197	if (!group \|\| !r \|\| !a) {
	198	ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
	199	goto err;
	200	}
	201	if (!ctx)
	202	if ((ctx_new = ctx = BN_CTX_new()) == NULL)
	203	goto err;
	204
	205	if (!BN_sqr(r, a, ctx))
	206	goto err;
	207	if (!group->field_mod_func(r, r, group->field, ctx))
	208	goto err;
	209
	210	ret = 1;
	211	err:
23a1d5e9	212	BN_CTX_free(ctx_new);
0f113f3e MC	213	return ret;
0f113f3e MC	214	}