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

/* crypto/ec/ec_lib.c */
/* ====================================================================
 * Copyright (c) 1998-2001 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).
 *
 */

#include <string.h>

#include <openssl/err.h>

#include "ec_lcl.h"


/* 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, ERR_R_PASSED_NULL_PARAMETER);
		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->extra_data_dup_func = 0;
	ret->extra_data_free_func = 0;
	ret->extra_data_clear_free_func = 0;
	
	if (!meth->group_init(ret))
		{
		OPENSSL_free(ret);
		return NULL;
		}
	
	return ret;
	}


int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
	{
	if (group->meth->group_set_curve_GFp == 0)
		{
		ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
	}


void EC_GROUP_free(EC_GROUP *group)
	{
	if (group->meth->group_finish != 0)
		group->meth->group_finish(group);

	EC_GROUP_free_extra_data(group);

	OPENSSL_free(group);
	}
 

void EC_GROUP_clear_free(EC_GROUP *group)
	{
	if (group->meth->group_clear_finish != 0)
		group->meth->group_clear_finish(group);
	else if (group->meth != NULL && group->meth->group_finish != 0)
		group->meth->group_finish(group);

	EC_GROUP_clear_free_extra_data(group);

	memset(group, 0, sizeof *group);
	OPENSSL_free(group);
	}


int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
	{
	if (dest->meth->group_copy == 0)
		{
		ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (dest->meth != src->meth)
		{
		ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	
	EC_GROUP_clear_free_extra_data(dest);
	if (src->extra_data_dup_func)
		{
		if (src->extra_data != NULL)
			{
			dest->extra_data = src->extra_data_dup_func(src->extra_data);
			if (dest->extra_data == NULL)
				return 0;
			}

		dest->extra_data_dup_func = src->extra_data_dup_func;
		dest->extra_data_free_func = src->extra_data_free_func;
		dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
		}

	return dest->meth->group_copy(dest, src);
	}


int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
	{
	if (group->meth->group_set_generator == 0)
		{
		ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	return group->meth->group_set_generator(group, generator, order, cofactor);
	}


/* TODO: 'set' and 'get' functions for EC_GROUPs */


/* this has 'package' visibility */
int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *),
	void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
	{
	if ((group->extra_data != NULL)
		|| (group->extra_data_dup_func != 0)
		|| (group->extra_data_free_func != 0)
		|| (group->extra_data_clear_free_func != 0))
		{
		ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
		return 0;
		}

	group->extra_data = extra_data;
	group->extra_data_dup_func = extra_data_dup_func;
	group->extra_data_free_func = extra_data_free_func;
	group->extra_data_clear_free_func = extra_data_clear_free_func;
	return 1;
	}


/* this has 'package' visibility */
void *EC_GROUP_get_extra_data(EC_GROUP *group, void *(*extra_data_dup_func)(void *),
	void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
	{
	if ((group->extra_data_dup_func != extra_data_dup_func)
		|| (group->extra_data_free_func != extra_data_free_func)
		|| (group->extra_data_clear_free_func != extra_data_clear_free_func))
		{
		ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
		return NULL;
		}

	return group->extra_data;
	}


/* this has 'package' visibility */
void EC_GROUP_free_extra_data(EC_GROUP *group)
	{
	if (group->extra_data_free_func)
		group->extra_data_free_func(group->extra_data);
	group->extra_data = NULL;
	group->extra_data_dup_func = 0;
	group->extra_data_free_func = 0;
	group->extra_data_clear_free_func = 0;
	}


/* this has 'package' visibility */
void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
	{
	if (group->extra_data_clear_free_func)
		group->extra_data_clear_free_func(group->extra_data);
	else if (group->extra_data_free_func)
		group->extra_data_free_func(group->extra_data);
	group->extra_data = NULL;
	group->extra_data_dup_func = 0;
	group->extra_data_free_func = 0;
	group->extra_data_clear_free_func = 0;
	}


/* functions for EC_POINT objects */

EC_POINT *EC_POINT_new(const EC_GROUP *group)
	{
	EC_POINT *ret;

	if (group == NULL)
		{
		ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
		return NULL;
		}
	if (group->meth->point_init == 0)
		{
		ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return NULL;
		}

	ret = OPENSSL_malloc(sizeof *ret);
	if (ret == NULL)
		{
		ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
		return NULL;
		}

	ret->meth = group->meth;
	
	if (!ret->meth->point_init(ret))
		{
		OPENSSL_free(ret);
		return NULL;
		}
	
	return ret;
	}


void EC_POINT_free(EC_POINT *point)
	{
	if (point->meth->point_finish != 0)
		point->meth->point_finish(point);
	OPENSSL_free(point);
	}
 

void EC_POINT_clear_free(EC_POINT *point)
	{
	if (point->meth->point_clear_finish != 0)
		point->meth->point_clear_finish(point);
	else if (point->meth != NULL && point->meth->point_finish != 0)
		point->meth->point_finish(point);
	memset(point, 0, sizeof *point);
	OPENSSL_free(point);
	}


int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
	{
	if (dest->meth->point_copy == 0)
		{
		ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (dest->meth != src->meth)
		{
		ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return dest->meth->point_copy(dest, src);
	}


int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point)
	{
	if (group->meth->point_set_to_infinity == 0)
		{
		ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->point_set_to_infinity(group, point);
	}


int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
	const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
	{
	if (group->meth->point_set_affine_coordinates_GFp == 0)
		{
		ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx);
	}


int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
	BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
	{
	if (group->meth->point_get_affine_coordinates_GFp == 0)
		{
		ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx);
	}


/* TODO: other 'set' and 'get' functions for EC_POINTs */


size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
        unsigned char *buf, size_t len, BN_CTX *ctx)
	{
	if (group->meth->point2oct == 0)
		{
		ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->point2oct(group, point, form, buf, len, ctx);
	}


int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
        const unsigned char *buf, size_t len, BN_CTX *ctx)
	{
	if (group->meth->oct2point == 0)
		{
		ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->oct2point(group, point, buf, len, ctx);
	}


int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
	{
	if (group->meth->add == 0)
		{
		ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth))
		{
		ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->add(group, r, a, b, ctx);
	}


int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
	{
	if (group->meth->dbl == 0)
		{
		ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if ((group->meth != r->meth) || (r->meth != a->meth))
		{
		ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->dbl(group, r, a, ctx);
	}


int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
	{
	if (group->meth->is_at_infinity == 0)
		{
		ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->is_at_infinity(group, point);
	}


int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
	{
	if (group->meth->is_on_curve == 0)
		{
		ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->is_on_curve(group, point, ctx);
	}


int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
	{
	if (group->meth->make_affine == 0)
		{
		ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->make_affine(group, point, ctx);
	}
Commit	Line	Data
65e81670 BM	1	/* crypto/ec/ec_lib.c */
	2	/* ====================================================================
	3	* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	*
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	*
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in
	14	* the documentation and/or other materials provided with the
	15	* distribution.
	16	*
	17	* 3. All advertising materials mentioning features or use of this
	18	* software must display the following acknowledgment:
	19	* "This product includes software developed by the OpenSSL Project
	20	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	21	*
	22	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	23	* endorse or promote products derived from this software without
	24	* prior written permission. For written permission, please contact
	25	* openssl-core@openssl.org.
	26	*
	27	* 5. Products derived from this software may not be called "OpenSSL"
	28	* nor may "OpenSSL" appear in their names without prior written
	29	* permission of the OpenSSL Project.
	30	*
	31	* 6. Redistributions of any form whatsoever must retain the following
	32	* acknowledgment:
	33	* "This product includes software developed by the OpenSSL Project
	34	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	35	*
	36	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	37	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	38	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	39	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	40	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	41	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	42	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	43	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	44	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	45	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	46	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	47	* OF THE POSSIBILITY OF SUCH DAMAGE.
	48	* ====================================================================
	49	*
	50	* This product includes cryptographic software written by Eric Young
	51	* (eay@cryptsoft.com). This product includes software written by Tim
	52	* Hudson (tjh@cryptsoft.com).
	53	*
	54	*/
	55
c4b36ff4 BM	56	#include <string.h>
c4b36ff4 BM	57
0657bf9c BM	58	#include <openssl/err.h>
0657bf9c BM	59
65e81670	60	#include "ec_lcl.h"
0657bf9c BM	61
	62
	63	/* functions for EC_GROUP objects */
	64
	65	EC_GROUP EC_GROUP_new(const EC_METHOD meth)
	66	{
	67	EC_GROUP *ret;
	68
	69	if (meth == NULL)
	70	{
	71	ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
	72	return NULL;
	73	}
	74	if (meth->group_init == 0)
	75	{
	76	ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	77	return NULL;
	78	}
	79
	80	ret = OPENSSL_malloc(sizeof *ret);
	81	if (ret == NULL)
	82	{
	83	ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
	84	return NULL;
	85	}
	86
	87	ret->meth = meth;
df9cc153 BM	88
	89	ret->extra_data = NULL;
	90	ret->extra_data_dup_func = 0;
	91	ret->extra_data_free_func = 0;
	92	ret->extra_data_clear_free_func = 0;
0657bf9c BM	93
	94	if (!meth->group_init(ret))
	95	{
	96	OPENSSL_free(ret);
	97	return NULL;
	98	}
	99
	100	return ret;
	101	}
	102
	103
	104	int EC_GROUP_set_curve_GFp(EC_GROUP group, const BIGNUM p, const BIGNUM a, const BIGNUM b, BN_CTX *ctx)
	105	{
	106	if (group->meth->group_set_curve_GFp == 0)
	107	{
	108	ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	109	return 0;
	110	}
0657bf9c BM	111	return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
	112	}
	113
	114
	115	void EC_GROUP_free(EC_GROUP *group)
	116	{
	117	if (group->meth->group_finish != 0)
	118	group->meth->group_finish(group);
df9cc153 BM	119
	120	EC_GROUP_free_extra_data(group);
	121
0657bf9c BM	122	OPENSSL_free(group);
	123	}
	124
	125
	126	void EC_GROUP_clear_free(EC_GROUP *group)
	127	{
	128	if (group->meth->group_clear_finish != 0)
	129	group->meth->group_clear_finish(group);
	130	else if (group->meth != NULL && group->meth->group_finish != 0)
	131	group->meth->group_finish(group);
df9cc153 BM	132
	133	EC_GROUP_clear_free_extra_data(group);
	134
c4b36ff4	135	memset(group, 0, sizeof *group);
0657bf9c BM	136	OPENSSL_free(group);
	137	}
	138
	139
	140	int EC_GROUP_copy(EC_GROUP dest, const EC_GROUP src)
	141	{
	142	if (dest->meth->group_copy == 0)
	143	{
	144	ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	145	return 0;
	146	}
	147	if (dest->meth != src->meth)
	148	{
	149	ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	150	return 0;
	151	}
	152
df9cc153 BM	153	EC_GROUP_clear_free_extra_data(dest);
	154	if (src->extra_data_dup_func)
	155	{
	156	if (src->extra_data != NULL)
	157	{
	158	dest->extra_data = src->extra_data_dup_func(src->extra_data);
	159	if (dest->extra_data == NULL)
	160	return 0;
	161	}
	162
	163	dest->extra_data_dup_func = src->extra_data_dup_func;
	164	dest->extra_data_free_func = src->extra_data_free_func;
	165	dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
	166	}
	167
0657bf9c BM	168	return dest->meth->group_copy(dest, src);
	169	}
	170
	171
	172	int EC_GROUP_set_generator(EC_GROUP group, const EC_POINT generator, const BIGNUM order, const BIGNUM cofactor)
	173	{
	174	if (group->meth->group_set_generator == 0)
	175	{
	176	ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	177	return 0;
	178	}
	179	return group->meth->group_set_generator(group, generator, order, cofactor);
	180	}
	181
	182
2e0db076	183	/* TODO: 'set' and 'get' functions for EC_GROUPs */
0657bf9c BM	184
0657bf9c BM	185
df9cc153 BM	186	/* this has 'package' visibility */
	187	int EC_GROUP_set_extra_data(EC_GROUP group, void extra_data, void (extra_data_dup_func)(void *),
	188	void (extra_data_free_func)(void ), void (extra_data_clear_free_func)(void ))
	189	{
	190	if ((group->extra_data != NULL)
	191	\|\| (group->extra_data_dup_func != 0)
	192	\|\| (group->extra_data_free_func != 0)
	193	\|\| (group->extra_data_clear_free_func != 0))
	194	{
	195	ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
	196	return 0;
	197	}
	198
	199	group->extra_data = extra_data;
	200	group->extra_data_dup_func = extra_data_dup_func;
	201	group->extra_data_free_func = extra_data_free_func;
	202	group->extra_data_clear_free_func = extra_data_clear_free_func;
	203	return 1;
	204	}
	205
	206
	207	/* this has 'package' visibility */
	208	void EC_GROUP_get_extra_data(EC_GROUP group, void (extra_data_dup_func)(void *),
	209	void (extra_data_free_func)(void ), void (extra_data_clear_free_func)(void ))
	210	{
	211	if ((group->extra_data_dup_func != extra_data_dup_func)
	212	\|\| (group->extra_data_free_func != extra_data_free_func)
	213	\|\| (group->extra_data_clear_free_func != extra_data_clear_free_func))
	214	{
	215	ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
	216	return NULL;
	217	}
	218
	219	return group->extra_data;
	220	}
	221
	222
	223	/* this has 'package' visibility */
	224	void EC_GROUP_free_extra_data(EC_GROUP *group)
	225	{
	226	if (group->extra_data_free_func)
	227	group->extra_data_free_func(group->extra_data);
	228	group->extra_data = NULL;
	229	group->extra_data_dup_func = 0;
	230	group->extra_data_free_func = 0;
	231	group->extra_data_clear_free_func = 0;
	232	}
	233
	234
	235	/* this has 'package' visibility */
	236	void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
	237	{
	238	if (group->extra_data_clear_free_func)
	239	group->extra_data_clear_free_func(group->extra_data);
	240	else if (group->extra_data_free_func)
	241	group->extra_data_free_func(group->extra_data);
	242	group->extra_data = NULL;
	243	group->extra_data_dup_func = 0;
	244	group->extra_data_free_func = 0;
	245	group->extra_data_clear_free_func = 0;
	246	}
	247
	248
0657bf9c BM	249
	250	/* functions for EC_POINT objects */
	251
	252	EC_POINT EC_POINT_new(const EC_GROUP group)
	253	{
	254	EC_POINT *ret;
	255
	256	if (group == NULL)
	257	{
	258	ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
	259	return NULL;
	260	}
	261	if (group->meth->point_init == 0)
	262	{
	263	ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	264	return NULL;
	265	}
	266
	267	ret = OPENSSL_malloc(sizeof *ret);
	268	if (ret == NULL)
	269	{
	270	ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
	271	return NULL;
	272	}
	273
	274	ret->meth = group->meth;
	275
	276	if (!ret->meth->point_init(ret))
	277	{
	278	OPENSSL_free(ret);
	279	return NULL;
	280	}
	281
	282	return ret;
	283	}
	284
	285
	286	void EC_POINT_free(EC_POINT *point)
	287	{
	288	if (point->meth->point_finish != 0)
	289	point->meth->point_finish(point);
	290	OPENSSL_free(point);
	291	}
	292
	293
	294	void EC_POINT_clear_free(EC_POINT *point)
	295	{
	296	if (point->meth->point_clear_finish != 0)
	297	point->meth->point_clear_finish(point);
	298	else if (point->meth != NULL && point->meth->point_finish != 0)
	299	point->meth->point_finish(point);
f418f8c1	300	memset(point, 0, sizeof *point);
0657bf9c BM	301	OPENSSL_free(point);
	302	}
	303
	304
	305	int EC_POINT_copy(EC_POINT dest, const EC_POINT src)
	306	{
	307	if (dest->meth->point_copy == 0)
	308	{
	309	ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	310	return 0;
	311	}
	312	if (dest->meth != src->meth)
	313	{
	314	ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	315	return 0;
	316	}
0657bf9c BM	317	return dest->meth->point_copy(dest, src);
	318	}
	319
	320
226cc7de BM	321	int EC_POINT_set_to_infinity(const EC_GROUP group, EC_POINT point)
	322	{
	323	if (group->meth->point_set_to_infinity == 0)
	324	{
	325	ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	326	return 0;
	327	}
	328	if (group->meth != point->meth)
	329	{
	330	ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
	331	return 0;
	332	}
	333	return group->meth->point_set_to_infinity(group, point);
	334	}
	335
	336
	337	int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP group, EC_POINT point,
	338	const BIGNUM x, const BIGNUM y, BN_CTX *ctx)
	339	{
	340	if (group->meth->point_set_affine_coordinates_GFp == 0)
	341	{
	342	ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	343	return 0;
	344	}
	345	if (group->meth != point->meth)
	346	{
	347	ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
	348	return 0;
	349	}
	350	return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx);
	351	}
	352
	353
	354	int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP group, const EC_POINT point,
	355	BIGNUM x, BIGNUM y, BN_CTX *ctx)
	356	{
	357	if (group->meth->point_get_affine_coordinates_GFp == 0)
	358	{
	359	ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	360	return 0;
	361	}
	362	if (group->meth != point->meth)
	363	{
	364	ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
	365	return 0;
	366	}
	367	return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx);
	368	}
	369
	370
	371	/* TODO: other 'set' and 'get' functions for EC_POINTs */
0657bf9c BM	372
	373
	374	size_t EC_POINT_point2oct(const EC_GROUP group, const EC_POINT point, point_conversion_form_t form,
	375	unsigned char buf, size_t len, BN_CTX ctx)
	376	{
	377	if (group->meth->point2oct == 0)
	378	{
	379	ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	380	return 0;
	381	}
	382	if (group->meth != point->meth)
	383	{
	384	ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
	385	return 0;
	386	}
	387	return group->meth->point2oct(group, point, form, buf, len, ctx);
	388	}
	389
	390
	391	int EC_POINT_oct2point(const EC_GROUP group, EC_POINT point,
	392	const unsigned char buf, size_t len, BN_CTX ctx)
	393	{
	394	if (group->meth->oct2point == 0)
	395	{
	396	ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	397	return 0;
	398	}
	399	if (group->meth != point->meth)
	400	{
	401	ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
	402	return 0;
	403	}
	404	return group->meth->oct2point(group, point, buf, len, ctx);
	405	}
	406
	407
	408	int EC_POINT_add(const EC_GROUP group, EC_POINT r, const EC_POINT a, const EC_POINT b, BN_CTX *ctx)
	409	{
	410	if (group->meth->add == 0)
	411	{
	412	ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	413	return 0;
	414	}
	415	if ((group->meth != r->meth) \|\| (r->meth != a->meth) \|\| (a->meth != b->meth))
	416	{
	417	ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
	418	return 0;
	419	}
	420	return group->meth->add(group, r, a, b, ctx);
	421	}
	422
	423
	424	int EC_POINT_dbl(const EC_GROUP group, EC_POINT r, const EC_POINT a, BN_CTX ctx)
	425	{
	426	if (group->meth->dbl == 0)
	427	{
	428	ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	429	return 0;
	430	}
	431	if ((group->meth != r->meth) \|\| (r->meth != a->meth))
	432	{
	433	ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
	434	return 0;
	435	}
436	return group->meth->dbl(group, r, a, ctx);
437	}
438
439
440	int EC_POINT_is_at_infinity(const EC_GROUP group, const EC_POINT point)
441	{
442	if (group->meth->is_at_infinity == 0)
443	{
444	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
445	return 0;
446	}
447	if (group->meth != point->meth)
448	{
449	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
450	return 0;
451	}
452	return group->meth->is_at_infinity(group, point);
453	}
454
455
456	int EC_POINT_is_on_curve(const EC_GROUP group, const EC_POINT point, BN_CTX *ctx)
457	{
458	if (group->meth->is_on_curve == 0)
459	{
460	ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
461	return 0;
462	}
463	if (group->meth != point->meth)
464	{
465	ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
466	return 0;
467	}
468	return group->meth->is_on_curve(group, point, ctx);
469	}
470
471
e869d4bd	472	int EC_POINT_make_affine(const EC_GROUP group, EC_POINT point, BN_CTX *ctx)
0657bf9c BM	473	{
	474	if (group->meth->make_affine == 0)
	475	{
	476	ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	477	return 0;
	478	}
	479	if (group->meth != point->meth)
	480	{
	481	ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
	482	return 0;
	483	}
	484	return group->meth->make_affine(group, point, ctx);
	485	}