[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 = {
        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,
        ec_GFp_simple_set_compressed_coordinates,
        ec_GFp_simple_point2oct,
        ec_GFp_simple_oct2point,
        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;
}

#if BN_BITS2 == 64
# define NO_32_BIT_TYPE
#endif

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;
    BIGNUM *tmp_bn;

    if (ctx == NULL)
        if ((ctx = new_ctx = BN_CTX_new()) == NULL)
            return 0;

    BN_CTX_start(ctx);
    if ((tmp_bn = BN_CTX_get(ctx)) == NULL)
        goto err;

    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) {
#ifndef NO_32_BIT_TYPE
        group->field_mod_func = BN_nist_mod_224;
#else
        ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
              EC_R_NOT_A_SUPPORTED_NIST_PRIME);
        goto err;
#endif
    } else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) {
#ifndef NO_32_BIT_TYPE
        group->field_mod_func = BN_nist_mod_256;
#else
        ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
              EC_R_NOT_A_SUPPORTED_NIST_PRIME);
        goto err;
#endif
    } else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) {
#ifndef NO_32_BIT_TYPE
        group->field_mod_func = BN_nist_mod_384;
#else
        ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
              EC_R_NOT_A_SUPPORTED_NIST_PRIME);
        goto err;
#endif
    } else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
        /* this one works in the NO_32_BIT_TYPE case */
        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
40720ce3	13	* notice, this list of conditions and the following disclaimer.
38e3c581 BM	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
37942fab NL	64	#include <limits.h>
37942fab NL	65
5c6bf031 BM	66	#include <openssl/err.h>
5c6bf031 BM	67	#include <openssl/obj_mac.h>
38e3c581	68	#include "ec_lcl.h"
0657bf9c	69
0657bf9c	70	const EC_METHOD *EC_GFp_nist_method(void)
40720ce3 MC	71	{
	72	static const EC_METHOD ret = {
	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,
	81	ec_GFp_simple_group_check_discriminant,
	82	ec_GFp_simple_point_init,
	83	ec_GFp_simple_point_finish,
	84	ec_GFp_simple_point_clear_finish,
	85	ec_GFp_simple_point_copy,
	86	ec_GFp_simple_point_set_to_infinity,
	87	ec_GFp_simple_set_Jprojective_coordinates_GFp,
	88	ec_GFp_simple_get_Jprojective_coordinates_GFp,
	89	ec_GFp_simple_point_set_affine_coordinates,
	90	ec_GFp_simple_point_get_affine_coordinates,
	91	ec_GFp_simple_set_compressed_coordinates,
	92	ec_GFp_simple_point2oct,
	93	ec_GFp_simple_oct2point,
	94	ec_GFp_simple_add,
	95	ec_GFp_simple_dbl,
	96	ec_GFp_simple_invert,
	97	ec_GFp_simple_is_at_infinity,
	98	ec_GFp_simple_is_on_curve,
	99	ec_GFp_simple_cmp,
	100	ec_GFp_simple_make_affine,
	101	ec_GFp_simple_points_make_affine,
	102	0 /* mul */ ,
	103	0 /* precompute_mult */ ,
	104	0 /* have_precompute_mult */ ,
	105	ec_GFp_nist_field_mul,
	106	ec_GFp_nist_field_sqr,
	107	0 /* field_div */ ,
	108	0 /* field_encode */ ,
	109	0 /* field_decode */ ,
	110	0 /* field_set_to_one */
	111	};
	112
	113	return &ret;
	114	}
60428dbf	115
fcb41c0e	116	#if BN_BITS2 == 64
40720ce3	117	# define NO_32_BIT_TYPE
5c6bf031	118	#endif
60428dbf	119
e2c9c91b	120	int ec_GFp_nist_group_copy(EC_GROUP dest, const EC_GROUP src)
40720ce3 MC	121	{
40720ce3 MC	122	dest->field_mod_func = src->field_mod_func;
e2c9c91b	123
40720ce3 MC	124	return ec_GFp_simple_group_copy(dest, src);
40720ce3 MC	125	}
5c6bf031 BM	126
5c6bf031 BM	127	int ec_GFp_nist_group_set_curve(EC_GROUP group, const BIGNUM p,
40720ce3 MC	128	const BIGNUM a, const BIGNUM b, BN_CTX *ctx)
	129	{
	130	int ret = 0;
	131	BN_CTX *new_ctx = NULL;
	132	BIGNUM *tmp_bn;
	133
	134	if (ctx == NULL)
	135	if ((ctx = new_ctx = BN_CTX_new()) == NULL)
	136	return 0;
	137
	138	BN_CTX_start(ctx);
	139	if ((tmp_bn = BN_CTX_get(ctx)) == NULL)
	140	goto err;
	141
	142	if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
	143	group->field_mod_func = BN_nist_mod_192;
	144	else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0) {
6b695fef	145	#ifndef NO_32_BIT_TYPE
40720ce3	146	group->field_mod_func = BN_nist_mod_224;
5c6bf031	147	#else
40720ce3 MC	148	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
	149	EC_R_NOT_A_SUPPORTED_NIST_PRIME);
	150	goto err;
5c6bf031	151	#endif
40720ce3	152	} else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) {
6b695fef	153	#ifndef NO_32_BIT_TYPE
40720ce3	154	group->field_mod_func = BN_nist_mod_256;
5c6bf031	155	#else
40720ce3 MC	156	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
	157	EC_R_NOT_A_SUPPORTED_NIST_PRIME);
	158	goto err;
5c6bf031	159	#endif
40720ce3	160	} else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) {
6b695fef	161	#ifndef NO_32_BIT_TYPE
40720ce3	162	group->field_mod_func = BN_nist_mod_384;
5c6bf031	163	#else
40720ce3 MC	164	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE,
	165	EC_R_NOT_A_SUPPORTED_NIST_PRIME);
	166	goto err;
5c6bf031	167	#endif
40720ce3 MC	168	} else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
	169	/* this one works in the NO_32_BIT_TYPE case */
	170	group->field_mod_func = BN_nist_mod_521;
	171	else {
	172	ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME);
	173	goto err;
	174	}
5c6bf031	175
40720ce3	176	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
5c6bf031	177
40720ce3 MC	178	err:
	179	BN_CTX_end(ctx);
	180	if (new_ctx != NULL)
	181	BN_CTX_free(new_ctx);
	182	return ret;
	183	}
a2dbcf36	184
5c6bf031	185	int ec_GFp_nist_field_mul(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
40720ce3 MC	186	const BIGNUM b, BN_CTX ctx)
	187	{
	188	int ret = 0;
	189	BN_CTX *ctx_new = NULL;
	190
	191	if (!group \|\| !r \|\| !a \|\| !b) {
	192	ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
	193	goto err;
	194	}
	195	if (!ctx)
	196	if ((ctx_new = ctx = BN_CTX_new()) == NULL)
	197	goto err;
	198
	199	if (!BN_mul(r, a, b, ctx))
	200	goto err;
	201	if (!group->field_mod_func(r, r, &group->field, ctx))
	202	goto err;
	203
	204	ret = 1;
	205	err:
	206	if (ctx_new)
	207	BN_CTX_free(ctx_new);
	208	return ret;
	209	}
a2dbcf36	210
5c6bf031	211	int ec_GFp_nist_field_sqr(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
40720ce3 MC	212	BN_CTX *ctx)
	213	{
	214	int ret = 0;
	215	BN_CTX *ctx_new = NULL;
	216
	217	if (!group \|\| !r \|\| !a) {
	218	ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
	219	goto err;
	220	}
	221	if (!ctx)
	222	if ((ctx_new = ctx = BN_CTX_new()) == NULL)
	223	goto err;
	224
	225	if (!BN_sqr(r, a, ctx))
	226	goto err;
	227	if (!group->field_mod_func(r, r, &group->field, ctx))
	228	goto err;
	229
	230	ret = 1;
	231	err:
	232	if (ctx_new)
	233	BN_CTX_free(ctx_new);
	234	return ret;
	235	}