[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;
	
	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);
	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);
	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;
		}
	
	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: 'get' functions for EC_GROUPs */


/* 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, const 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;
	88
	89	if (!meth->group_init(ret))
	90	{
	91	OPENSSL_free(ret);
	92	return NULL;
	93	}
	94
	95	return ret;
	96	}
	97
	98
	99	int EC_GROUP_set_curve_GFp(EC_GROUP group, const BIGNUM p, const BIGNUM a, const BIGNUM b, BN_CTX *ctx)
	100	{
	101	if (group->meth->group_set_curve_GFp == 0)
	102	{
	103	ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	104	return 0;
	105	}
	106
	107	return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
	108	}
	109
	110
	111	void EC_GROUP_free(EC_GROUP *group)
	112	{
	113	if (group->meth->group_finish != 0)
	114	group->meth->group_finish(group);
	115	OPENSSL_free(group);
	116	}
	117
	118
	119	void EC_GROUP_clear_free(EC_GROUP *group)
	120	{
	121	if (group->meth->group_clear_finish != 0)
	122	group->meth->group_clear_finish(group);
	123	else if (group->meth != NULL && group->meth->group_finish != 0)
	124	group->meth->group_finish(group);
c4b36ff4	125	memset(group, 0, sizeof *group);
0657bf9c BM	126	OPENSSL_free(group);
	127	}
	128
	129
	130	int EC_GROUP_copy(EC_GROUP dest, const EC_GROUP src)
	131	{
	132	if (dest->meth->group_copy == 0)
	133	{
	134	ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	135	return 0;
	136	}
	137	if (dest->meth != src->meth)
	138	{
	139	ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	140	return 0;
	141	}
	142
	143	return dest->meth->group_copy(dest, src);
	144	}
	145
	146
	147	int EC_GROUP_set_generator(EC_GROUP group, const EC_POINT generator, const BIGNUM order, const BIGNUM cofactor)
	148	{
	149	if (group->meth->group_set_generator == 0)
	150	{
	151	ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	152	return 0;
	153	}
	154	return group->meth->group_set_generator(group, generator, order, cofactor);
	155	}
	156
	157
	158	/* TODO: 'get' functions for EC_GROUPs */
	159
	160
	161
	162	/* functions for EC_POINT objects */
	163
	164	EC_POINT EC_POINT_new(const EC_GROUP group)
	165	{
	166	EC_POINT *ret;
	167
	168	if (group == NULL)
	169	{
	170	ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
	171	return NULL;
	172	}
	173	if (group->meth->point_init == 0)
	174	{
	175	ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	176	return NULL;
	177	}
	178
	179	ret = OPENSSL_malloc(sizeof *ret);
	180	if (ret == NULL)
	181	{
	182	ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
	183	return NULL;
	184	}
	185
	186	ret->meth = group->meth;
	187
	188	if (!ret->meth->point_init(ret))
	189	{
190	OPENSSL_free(ret);
191	return NULL;
192	}
193
194	return ret;
195	}
196
197
198	void EC_POINT_free(EC_POINT *point)
199	{
200	if (point->meth->point_finish != 0)
201	point->meth->point_finish(point);
202	OPENSSL_free(point);
203	}
204
205
206	void EC_POINT_clear_free(EC_POINT *point)
207	{
208	if (point->meth->point_clear_finish != 0)
209	point->meth->point_clear_finish(point);
210	else if (point->meth != NULL && point->meth->point_finish != 0)
211	point->meth->point_finish(point);
f418f8c1	212	memset(point, 0, sizeof *point);
0657bf9c BM	213	OPENSSL_free(point);
	214	}
	215
	216
	217	int EC_POINT_copy(EC_POINT dest, const EC_POINT src)
	218	{
	219	if (dest->meth->point_copy == 0)
	220	{
	221	ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	222	return 0;
	223	}
	224	if (dest->meth != src->meth)
	225	{
	226	ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
	227	return 0;
	228	}
	229
	230	return dest->meth->point_copy(dest, src);
	231	}
	232
	233
	234	/* TODO: 'set' and 'get' functions for EC_POINTs */
	235
	236
	237	size_t EC_POINT_point2oct(const EC_GROUP group, const EC_POINT point, point_conversion_form_t form,
	238	unsigned char buf, size_t len, BN_CTX ctx)
	239	{
	240	if (group->meth->point2oct == 0)
	241	{
	242	ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	243	return 0;
	244	}
	245	if (group->meth != point->meth)
	246	{
	247	ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
	248	return 0;
	249	}
	250	return group->meth->point2oct(group, point, form, buf, len, ctx);
	251	}
	252
	253
	254	int EC_POINT_oct2point(const EC_GROUP group, EC_POINT point,
	255	const unsigned char buf, size_t len, BN_CTX ctx)
	256	{
	257	if (group->meth->oct2point == 0)
	258	{
	259	ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	260	return 0;
	261	}
	262	if (group->meth != point->meth)
	263	{
	264	ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
	265	return 0;
	266	}
	267	return group->meth->oct2point(group, point, buf, len, ctx);
	268	}
	269
	270
	271	int EC_POINT_add(const EC_GROUP group, EC_POINT r, const EC_POINT a, const EC_POINT b, BN_CTX *ctx)
	272	{
	273	if (group->meth->add == 0)
	274	{
	275	ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	276	return 0;
277	}
278	if ((group->meth != r->meth) \|\| (r->meth != a->meth) \|\| (a->meth != b->meth))
279	{
280	ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
281	return 0;
282	}
283	return group->meth->add(group, r, a, b, ctx);
284	}
285
286
287	int EC_POINT_dbl(const EC_GROUP group, EC_POINT r, const EC_POINT a, BN_CTX ctx)
288	{
289	if (group->meth->dbl == 0)
290	{
291	ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
292	return 0;
293	}
294	if ((group->meth != r->meth) \|\| (r->meth != a->meth))
295	{
296	ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
297	return 0;
298	}
299	return group->meth->dbl(group, r, a, ctx);
300	}
301
302
303	int EC_POINT_is_at_infinity(const EC_GROUP group, const EC_POINT point)
304	{
305	if (group->meth->is_at_infinity == 0)
306	{
307	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
308	return 0;
309	}
310	if (group->meth != point->meth)
311	{
312	ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
313	return 0;
314	}
315	return group->meth->is_at_infinity(group, point);
316	}
317
318
319	int EC_POINT_is_on_curve(const EC_GROUP group, const EC_POINT point, BN_CTX *ctx)
320	{
321	if (group->meth->is_on_curve == 0)
322	{
323	ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
324	return 0;
325	}
326	if (group->meth != point->meth)
327	{
328	ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
329	return 0;
330	}
331	return group->meth->is_on_curve(group, point, ctx);
332	}
333
334
335	int EC_POINT_make_affine(const EC_GROUP group, const EC_POINT point, BN_CTX *ctx)
336	{
337	if (group->meth->make_affine == 0)
338	{
339	ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
340	return 0;
341	}
342	if (group->meth != point->meth)
343	{
344	ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
345	return 0;
346	}
347	return group->meth->make_affine(group, point, ctx);
348	}