[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);
	}


/* TODO: '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	}
	111
	112	return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
	113	}
	114
	115
	116	void EC_GROUP_free(EC_GROUP *group)
	117	{
	118	if (group->meth->group_finish != 0)
	119	group->meth->group_finish(group);
df9cc153 BM	120
	121	EC_GROUP_free_extra_data(group);
	122
0657bf9c BM	123	OPENSSL_free(group);
	124	}
	125
	126
	127	void EC_GROUP_clear_free(EC_GROUP *group)
	128	{
	129	if (group->meth->group_clear_finish != 0)
	130	group->meth->group_clear_finish(group);
	131	else if (group->meth != NULL && group->meth->group_finish != 0)
	132	group->meth->group_finish(group);
df9cc153 BM	133
	134	EC_GROUP_clear_free_extra_data(group);
	135
c4b36ff4	136	memset(group, 0, sizeof *group);
0657bf9c BM	137	OPENSSL_free(group);
	138	}
	139
	140
	141	int EC_GROUP_copy(EC_GROUP dest, const EC_GROUP src)
	142	{
	143	if (dest->meth->group_copy == 0)
	144	{
	145	ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	146	return 0;
	147	}
	148	if (dest->meth != src->meth)
	149	{
	150	ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	151	return 0;
	152	}
	153
df9cc153 BM	154	EC_GROUP_clear_free_extra_data(dest);
	155	if (src->extra_data_dup_func)
	156	{
	157	if (src->extra_data != NULL)
	158	{
	159	dest->extra_data = src->extra_data_dup_func(src->extra_data);
	160	if (dest->extra_data == NULL)
	161	return 0;
	162	}
	163
	164	dest->extra_data_dup_func = src->extra_data_dup_func;
	165	dest->extra_data_free_func = src->extra_data_free_func;
	166	dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
	167	}
	168
0657bf9c BM	169	return dest->meth->group_copy(dest, src);
	170	}
	171
	172
	173	int EC_GROUP_set_generator(EC_GROUP group, const EC_POINT generator, const BIGNUM order, const BIGNUM cofactor)
	174	{
	175	if (group->meth->group_set_generator == 0)
	176	{
	177	ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	178	return 0;
	179	}
	180	return group->meth->group_set_generator(group, generator, order, cofactor);
	181	}
	182
	183
2e0db076	184	/* TODO: 'set' and 'get' functions for EC_GROUPs */
0657bf9c BM	185
0657bf9c BM	186
df9cc153 BM	187	/* this has 'package' visibility */
	188	int EC_GROUP_set_extra_data(EC_GROUP group, void extra_data, void (extra_data_dup_func)(void *),
	189	void (extra_data_free_func)(void ), void (extra_data_clear_free_func)(void ))
	190	{
	191	if ((group->extra_data != NULL)
	192	\|\| (group->extra_data_dup_func != 0)
	193	\|\| (group->extra_data_free_func != 0)
	194	\|\| (group->extra_data_clear_free_func != 0))
	195	{
	196	ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
	197	return 0;
	198	}
	199
	200	group->extra_data = extra_data;
	201	group->extra_data_dup_func = extra_data_dup_func;
	202	group->extra_data_free_func = extra_data_free_func;
	203	group->extra_data_clear_free_func = extra_data_clear_free_func;
	204	return 1;
	205	}
	206
	207
	208	/* this has 'package' visibility */
	209	void EC_GROUP_get_extra_data(EC_GROUP group, void (extra_data_dup_func)(void *),
	210	void (extra_data_free_func)(void ), void (extra_data_clear_free_func)(void ))
	211	{
	212	if ((group->extra_data_dup_func != extra_data_dup_func)
	213	\|\| (group->extra_data_free_func != extra_data_free_func)
	214	\|\| (group->extra_data_clear_free_func != extra_data_clear_free_func))
	215	{
	216	ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
	217	return NULL;
	218	}
	219
	220	return group->extra_data;
	221	}
	222
	223
	224	/* this has 'package' visibility */
	225	void EC_GROUP_free_extra_data(EC_GROUP *group)
	226	{
	227	if (group->extra_data_free_func)
	228	group->extra_data_free_func(group->extra_data);
	229	group->extra_data = NULL;
	230	group->extra_data_dup_func = 0;
	231	group->extra_data_free_func = 0;
	232	group->extra_data_clear_free_func = 0;
	233	}
	234
	235
	236	/* this has 'package' visibility */
	237	void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
	238	{
	239	if (group->extra_data_clear_free_func)
	240	group->extra_data_clear_free_func(group->extra_data);
	241	else if (group->extra_data_free_func)
	242	group->extra_data_free_func(group->extra_data);
	243	group->extra_data = NULL;
	244	group->extra_data_dup_func = 0;
	245	group->extra_data_free_func = 0;
	246	group->extra_data_clear_free_func = 0;
	247	}
	248
	249
0657bf9c BM	250
	251	/* functions for EC_POINT objects */
	252
	253	EC_POINT EC_POINT_new(const EC_GROUP group)
	254	{
	255	EC_POINT *ret;
	256
	257	if (group == NULL)
	258	{
	259	ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
	260	return NULL;
	261	}
	262	if (group->meth->point_init == 0)
	263	{
	264	ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	265	return NULL;
	266	}
	267
	268	ret = OPENSSL_malloc(sizeof *ret);
	269	if (ret == NULL)
	270	{
	271	ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
	272	return NULL;
	273	}
	274
	275	ret->meth = group->meth;
	276
	277	if (!ret->meth->point_init(ret))
	278	{
	279	OPENSSL_free(ret);
	280	return NULL;
	281	}
	282
	283	return ret;
	284	}
	285
	286
	287	void EC_POINT_free(EC_POINT *point)
	288	{
	289	if (point->meth->point_finish != 0)
	290	point->meth->point_finish(point);
	291	OPENSSL_free(point);
	292	}
	293
	294
	295	void EC_POINT_clear_free(EC_POINT *point)
	296	{
	297	if (point->meth->point_clear_finish != 0)
	298	point->meth->point_clear_finish(point);
	299	else if (point->meth != NULL && point->meth->point_finish != 0)
	300	point->meth->point_finish(point);
f418f8c1	301	memset(point, 0, sizeof *point);
0657bf9c BM	302	OPENSSL_free(point);
	303	}
	304
	305
	306	int EC_POINT_copy(EC_POINT dest, const EC_POINT src)
	307	{
	308	if (dest->meth->point_copy == 0)
	309	{
	310	ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	311	return 0;
	312	}
	313	if (dest->meth != src->meth)
	314	{
	315	ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	316	return 0;
	317	}
	318
	319	return dest->meth->point_copy(dest, src);
	320	}
	321
	322
	323	/* TODO: 'set' and 'get' functions for EC_POINTs */
	324
	325
	326	size_t EC_POINT_point2oct(const EC_GROUP group, const EC_POINT point, point_conversion_form_t form,
	327	unsigned char buf, size_t len, BN_CTX ctx)
	328	{
	329	if (group->meth->point2oct == 0)
	330	{
	331	ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	332	return 0;
	333	}
	334	if (group->meth != point->meth)
	335	{
	336	ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
	337	return 0;
	338	}
	339	return group->meth->point2oct(group, point, form, buf, len, ctx);
	340	}
	341
	342
	343	int EC_POINT_oct2point(const EC_GROUP group, EC_POINT point,
	344	const unsigned char buf, size_t len, BN_CTX ctx)
	345	{
	346	if (group->meth->oct2point == 0)
	347	{
	348	ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	349	return 0;
	350	}
	351	if (group->meth != point->meth)
	352	{
	353	ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
	354	return 0;
	355	}
	356	return group->meth->oct2point(group, point, buf, len, ctx);
	357	}
	358
	359
	360	int EC_POINT_add(const EC_GROUP group, EC_POINT r, const EC_POINT a, const EC_POINT b, BN_CTX *ctx)
	361	{
	362	if (group->meth->add == 0)
	363	{
	364	ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	365	return 0;
366	}
367	if ((group->meth != r->meth) \|\| (r->meth != a->meth) \|\| (a->meth != b->meth))
368	{
369	ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
370	return 0;
371	}
372	return group->meth->add(group, r, a, b, ctx);
373	}
374
375
376	int EC_POINT_dbl(const EC_GROUP group, EC_POINT r, const EC_POINT a, BN_CTX ctx)
377	{
378	if (group->meth->dbl == 0)
379	{
380	ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
381	return 0;
382	}
383	if ((group->meth != r->meth) \|\| (r->meth != a->meth))
384	{
385	ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
386	return 0;
387	}
388	return group->meth->dbl(group, r, a, ctx);
389	}
390
391
392	int EC_POINT_is_at_infinity(const EC_GROUP group, const EC_POINT point)
393	{
394	if (group->meth->is_at_infinity == 0)
395	{
396	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
397	return 0;
398	}
399	if (group->meth != point->meth)
400	{
401	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
402	return 0;
403	}
404	return group->meth->is_at_infinity(group, point);
405	}
406
407
408	int EC_POINT_is_on_curve(const EC_GROUP group, const EC_POINT point, BN_CTX *ctx)
409	{
410	if (group->meth->is_on_curve == 0)
411	{
412	ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
413	return 0;
414	}
415	if (group->meth != point->meth)
416	{
417	ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
418	return 0;
419	}
420	return group->meth->is_on_curve(group, point, ctx);
421	}
422
423
e869d4bd	424	int EC_POINT_make_affine(const EC_GROUP group, EC_POINT point, BN_CTX *ctx)
0657bf9c BM	425	{
	426	if (group->meth->make_affine == 0)
	427	{
	428	ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	429	return 0;
	430	}
	431	if (group->meth != point->meth)
	432	{
	433	ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
	434	return 0;
	435	}
	436	return group->meth->make_affine(group, point, ctx);
	437	}