1 /* crypto/ec/ec_lib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
58 #include <openssl/err.h>
59 #include <openssl/opensslv.h>
63 static const char EC_version
[] = "EC" OPENSSL_VERSION_PTEXT
;
66 /* functions for EC_GROUP objects */
68 EC_GROUP
*EC_GROUP_new(const EC_METHOD
*meth
)
74 ECerr(EC_F_EC_GROUP_NEW
, ERR_R_PASSED_NULL_PARAMETER
);
77 if (meth
->group_init
== 0)
79 ECerr(EC_F_EC_GROUP_NEW
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
83 ret
= OPENSSL_malloc(sizeof *ret
);
86 ECerr(EC_F_EC_GROUP_NEW
, ERR_R_MALLOC_FAILURE
);
92 ret
->extra_data
= NULL
;
93 ret
->extra_data_dup_func
= 0;
94 ret
->extra_data_free_func
= 0;
95 ret
->extra_data_clear_free_func
= 0;
97 ret
->generator
= NULL
;
99 BN_init(&ret
->cofactor
);
103 ret
->asn1_form
= POINT_CONVERSION_UNCOMPRESSED
;
108 if (!meth
->group_init(ret
))
118 void EC_GROUP_free(EC_GROUP
*group
)
122 if (group
->meth
->group_finish
!= 0)
123 group
->meth
->group_finish(group
);
125 EC_GROUP_free_extra_data(group
);
127 if (group
->generator
!= NULL
)
128 EC_POINT_free(group
->generator
);
129 BN_free(&group
->order
);
130 BN_free(&group
->cofactor
);
133 OPENSSL_free(group
->seed
);
139 void EC_GROUP_clear_free(EC_GROUP
*group
)
143 if (group
->meth
->group_clear_finish
!= 0)
144 group
->meth
->group_clear_finish(group
);
145 else if (group
->meth
!= NULL
&& group
->meth
->group_finish
!= 0)
146 group
->meth
->group_finish(group
);
148 EC_GROUP_clear_free_extra_data(group
);
150 if (group
->generator
!= NULL
)
151 EC_POINT_clear_free(group
->generator
);
152 BN_clear_free(&group
->order
);
153 BN_clear_free(&group
->cofactor
);
157 memset(group
->seed
, 0, group
->seed_len
);
158 OPENSSL_free(group
->seed
);
161 memset(group
, 0, sizeof *group
);
166 int EC_GROUP_copy(EC_GROUP
*dest
, const EC_GROUP
*src
)
168 if (dest
->meth
->group_copy
== 0)
170 ECerr(EC_F_EC_GROUP_COPY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
173 if (dest
->meth
!= src
->meth
)
175 ECerr(EC_F_EC_GROUP_COPY
, EC_R_INCOMPATIBLE_OBJECTS
);
181 EC_GROUP_clear_free_extra_data(dest
);
182 if (src
->extra_data_dup_func
)
184 if (src
->extra_data
!= NULL
)
186 dest
->extra_data
= src
->extra_data_dup_func(src
->extra_data
);
187 if (dest
->extra_data
== NULL
)
191 dest
->extra_data_dup_func
= src
->extra_data_dup_func
;
192 dest
->extra_data_free_func
= src
->extra_data_free_func
;
193 dest
->extra_data_clear_free_func
= src
->extra_data_clear_free_func
;
196 if (src
->generator
!= NULL
)
198 if (dest
->generator
== NULL
)
200 dest
->generator
= EC_POINT_new(dest
);
201 if (dest
->generator
== NULL
) return 0;
203 if (!EC_POINT_copy(dest
->generator
, src
->generator
)) return 0;
207 /* src->generator == NULL */
208 if (dest
->generator
!= NULL
)
210 EC_POINT_clear_free(dest
->generator
);
211 dest
->generator
= NULL
;
215 if (!BN_copy(&dest
->order
, &src
->order
)) return 0;
216 if (!BN_copy(&dest
->cofactor
, &src
->cofactor
)) return 0;
218 dest
->curve_name
= src
->curve_name
;
219 dest
->asn1_flag
= src
->asn1_flag
;
220 dest
->asn1_form
= src
->asn1_form
;
225 OPENSSL_free(dest
->seed
);
226 dest
->seed
= OPENSSL_malloc(src
->seed_len
);
227 if (dest
->seed
== NULL
)
229 if (!memcpy(dest
->seed
, src
->seed
, src
->seed_len
))
231 dest
->seed_len
= src
->seed_len
;
236 OPENSSL_free(dest
->seed
);
242 return dest
->meth
->group_copy(dest
, src
);
246 const EC_METHOD
*EC_GROUP_method_of(const EC_GROUP
*group
)
252 int EC_METHOD_get_field_type(const EC_METHOD
*meth
)
254 return meth
->field_type
;
258 int EC_GROUP_set_generator(EC_GROUP
*group
, const EC_POINT
*generator
, const BIGNUM
*order
, const BIGNUM
*cofactor
)
260 if (generator
== NULL
)
262 ECerr(EC_F_EC_GROUP_SET_GENERATOR
, ERR_R_PASSED_NULL_PARAMETER
);
266 if (group
->generator
== NULL
)
268 group
->generator
= EC_POINT_new(group
);
269 if (group
->generator
== NULL
) return 0;
271 if (!EC_POINT_copy(group
->generator
, generator
)) return 0;
274 { if (!BN_copy(&group
->order
, order
)) return 0; }
276 { if (!BN_zero(&group
->order
)) return 0; }
278 if (cofactor
!= NULL
)
279 { if (!BN_copy(&group
->cofactor
, cofactor
)) return 0; }
281 { if (!BN_zero(&group
->cofactor
)) return 0; }
287 EC_POINT
*EC_GROUP_get0_generator(const EC_GROUP
*group
)
289 return group
->generator
;
293 int EC_GROUP_get_order(const EC_GROUP
*group
, BIGNUM
*order
, BN_CTX
*ctx
)
295 if (!BN_copy(order
, &group
->order
))
298 return !BN_is_zero(order
);
302 int EC_GROUP_get_cofactor(const EC_GROUP
*group
, BIGNUM
*cofactor
, BN_CTX
*ctx
)
304 if (!BN_copy(cofactor
, &group
->cofactor
))
307 return !BN_is_zero(&group
->cofactor
);
311 void EC_GROUP_set_nid(EC_GROUP
*group
, int nid
)
313 group
->curve_name
= nid
;
317 int EC_GROUP_get_nid(const EC_GROUP
*group
)
319 return group
->curve_name
;
323 void EC_GROUP_set_asn1_flag(EC_GROUP
*group
, int flag
)
325 group
->asn1_flag
= flag
;
329 int EC_GROUP_get_asn1_flag(const EC_GROUP
*group
)
331 return group
->asn1_flag
;
335 void EC_GROUP_set_point_conversion_form(EC_GROUP
*group
,
336 point_conversion_form_t form
)
338 group
->asn1_form
= form
;
342 point_conversion_form_t
EC_GROUP_get_point_conversion_form(const EC_GROUP
*group
)
344 return group
->asn1_form
;
348 size_t EC_GROUP_set_seed(EC_GROUP
*group
, const unsigned char *p
, size_t len
)
352 OPENSSL_free(group
->seed
);
360 if ((group
->seed
= OPENSSL_malloc(len
)) == NULL
)
362 memcpy(group
->seed
, p
, len
);
363 group
->seed_len
= len
;
369 unsigned char *EC_GROUP_get0_seed(const EC_GROUP
*group
)
375 size_t EC_GROUP_get_seed_len(const EC_GROUP
*group
)
377 return group
->seed_len
;
381 int EC_GROUP_set_curve_GFp(EC_GROUP
*group
, const BIGNUM
*p
, const BIGNUM
*a
, const BIGNUM
*b
, BN_CTX
*ctx
)
383 if (group
->meth
->group_set_curve_GFp
== 0)
385 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
388 return group
->meth
->group_set_curve_GFp(group
, p
, a
, b
, ctx
);
392 int EC_GROUP_get_curve_GFp(const EC_GROUP
*group
, BIGNUM
*p
, BIGNUM
*a
, BIGNUM
*b
, BN_CTX
*ctx
)
394 if (group
->meth
->group_get_curve_GFp
== 0)
396 ECerr(EC_F_EC_GROUP_GET_CURVE_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
399 return group
->meth
->group_get_curve_GFp(group
, p
, a
, b
, ctx
);
403 int EC_GROUP_check_discriminant(const EC_GROUP
*group
, BN_CTX
*ctx
)
405 if (group
->meth
->group_check_discriminant
== 0)
407 ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
410 return group
->meth
->group_check_discriminant(group
, ctx
);
414 /* this has 'package' visibility */
415 int EC_GROUP_set_extra_data(EC_GROUP
*group
, void *extra_data
, void *(*extra_data_dup_func
)(void *),
416 void (*extra_data_free_func
)(void *), void (*extra_data_clear_free_func
)(void *))
418 if ((group
->extra_data
!= NULL
)
419 || (group
->extra_data_dup_func
!= 0)
420 || (group
->extra_data_free_func
!= 0)
421 || (group
->extra_data_clear_free_func
!= 0))
423 ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA
, EC_R_SLOT_FULL
);
427 group
->extra_data
= extra_data
;
428 group
->extra_data_dup_func
= extra_data_dup_func
;
429 group
->extra_data_free_func
= extra_data_free_func
;
430 group
->extra_data_clear_free_func
= extra_data_clear_free_func
;
435 /* this has 'package' visibility */
436 void *EC_GROUP_get_extra_data(const EC_GROUP
*group
, void *(*extra_data_dup_func
)(void *),
437 void (*extra_data_free_func
)(void *), void (*extra_data_clear_free_func
)(void *))
439 if ((group
->extra_data_dup_func
!= extra_data_dup_func
)
440 || (group
->extra_data_free_func
!= extra_data_free_func
)
441 || (group
->extra_data_clear_free_func
!= extra_data_clear_free_func
))
443 ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA
, EC_R_NO_SUCH_EXTRA_DATA
);
447 return group
->extra_data
;
451 /* this has 'package' visibility */
452 void EC_GROUP_free_extra_data(EC_GROUP
*group
)
454 if (group
->extra_data_free_func
)
455 group
->extra_data_free_func(group
->extra_data
);
456 group
->extra_data
= NULL
;
457 group
->extra_data_dup_func
= 0;
458 group
->extra_data_free_func
= 0;
459 group
->extra_data_clear_free_func
= 0;
463 /* this has 'package' visibility */
464 void EC_GROUP_clear_free_extra_data(EC_GROUP
*group
)
466 if (group
->extra_data_clear_free_func
)
467 group
->extra_data_clear_free_func(group
->extra_data
);
468 else if (group
->extra_data_free_func
)
469 group
->extra_data_free_func(group
->extra_data
);
470 group
->extra_data
= NULL
;
471 group
->extra_data_dup_func
= 0;
472 group
->extra_data_free_func
= 0;
473 group
->extra_data_clear_free_func
= 0;
477 /* functions for EC_POINT objects */
479 EC_POINT
*EC_POINT_new(const EC_GROUP
*group
)
485 ECerr(EC_F_EC_POINT_NEW
, ERR_R_PASSED_NULL_PARAMETER
);
488 if (group
->meth
->point_init
== 0)
490 ECerr(EC_F_EC_POINT_NEW
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
494 ret
= OPENSSL_malloc(sizeof *ret
);
497 ECerr(EC_F_EC_POINT_NEW
, ERR_R_MALLOC_FAILURE
);
501 ret
->meth
= group
->meth
;
503 if (!ret
->meth
->point_init(ret
))
513 void EC_POINT_free(EC_POINT
*point
)
517 if (point
->meth
->point_finish
!= 0)
518 point
->meth
->point_finish(point
);
523 void EC_POINT_clear_free(EC_POINT
*point
)
527 if (point
->meth
->point_clear_finish
!= 0)
528 point
->meth
->point_clear_finish(point
);
529 else if (point
->meth
!= NULL
&& point
->meth
->point_finish
!= 0)
530 point
->meth
->point_finish(point
);
531 memset(point
, 0, sizeof *point
);
536 int EC_POINT_copy(EC_POINT
*dest
, const EC_POINT
*src
)
538 if (dest
->meth
->point_copy
== 0)
540 ECerr(EC_F_EC_POINT_COPY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
543 if (dest
->meth
!= src
->meth
)
545 ECerr(EC_F_EC_POINT_COPY
, EC_R_INCOMPATIBLE_OBJECTS
);
550 return dest
->meth
->point_copy(dest
, src
);
554 const EC_METHOD
*EC_POINT_method_of(const EC_POINT
*point
)
560 int EC_POINT_set_to_infinity(const EC_GROUP
*group
, EC_POINT
*point
)
562 if (group
->meth
->point_set_to_infinity
== 0)
564 ECerr(EC_F_EC_POINT_SET_TO_INFINITY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
567 if (group
->meth
!= point
->meth
)
569 ECerr(EC_F_EC_POINT_SET_TO_INFINITY
, EC_R_INCOMPATIBLE_OBJECTS
);
572 return group
->meth
->point_set_to_infinity(group
, point
);
576 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP
*group
, EC_POINT
*point
,
577 const BIGNUM
*x
, const BIGNUM
*y
, const BIGNUM
*z
, BN_CTX
*ctx
)
579 if (group
->meth
->point_set_Jprojective_coordinates_GFp
== 0)
581 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
584 if (group
->meth
!= point
->meth
)
586 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP
, EC_R_INCOMPATIBLE_OBJECTS
);
589 return group
->meth
->point_set_Jprojective_coordinates_GFp(group
, point
, x
, y
, z
, ctx
);
593 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP
*group
, const EC_POINT
*point
,
594 BIGNUM
*x
, BIGNUM
*y
, BIGNUM
*z
, BN_CTX
*ctx
)
596 if (group
->meth
->point_get_Jprojective_coordinates_GFp
== 0)
598 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
601 if (group
->meth
!= point
->meth
)
603 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP
, EC_R_INCOMPATIBLE_OBJECTS
);
606 return group
->meth
->point_get_Jprojective_coordinates_GFp(group
, point
, x
, y
, z
, ctx
);
610 int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP
*group
, EC_POINT
*point
,
611 const BIGNUM
*x
, const BIGNUM
*y
, BN_CTX
*ctx
)
613 if (group
->meth
->point_set_affine_coordinates_GFp
== 0)
615 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
618 if (group
->meth
!= point
->meth
)
620 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP
, EC_R_INCOMPATIBLE_OBJECTS
);
623 return group
->meth
->point_set_affine_coordinates_GFp(group
, point
, x
, y
, ctx
);
627 int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP
*group
, const EC_POINT
*point
,
628 BIGNUM
*x
, BIGNUM
*y
, BN_CTX
*ctx
)
630 if (group
->meth
->point_get_affine_coordinates_GFp
== 0)
632 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
635 if (group
->meth
!= point
->meth
)
637 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP
, EC_R_INCOMPATIBLE_OBJECTS
);
640 return group
->meth
->point_get_affine_coordinates_GFp(group
, point
, x
, y
, ctx
);
644 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP
*group
, EC_POINT
*point
,
645 const BIGNUM
*x
, int y_bit
, BN_CTX
*ctx
)
647 if (group
->meth
->point_set_compressed_coordinates_GFp
== 0)
649 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
652 if (group
->meth
!= point
->meth
)
654 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP
, EC_R_INCOMPATIBLE_OBJECTS
);
657 return group
->meth
->point_set_compressed_coordinates_GFp(group
, point
, x
, y_bit
, ctx
);
661 size_t EC_POINT_point2oct(const EC_GROUP
*group
, const EC_POINT
*point
, point_conversion_form_t form
,
662 unsigned char *buf
, size_t len
, BN_CTX
*ctx
)
664 if (group
->meth
->point2oct
== 0)
666 ECerr(EC_F_EC_POINT_POINT2OCT
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
669 if (group
->meth
!= point
->meth
)
671 ECerr(EC_F_EC_POINT_POINT2OCT
, EC_R_INCOMPATIBLE_OBJECTS
);
674 return group
->meth
->point2oct(group
, point
, form
, buf
, len
, ctx
);
678 int EC_POINT_oct2point(const EC_GROUP
*group
, EC_POINT
*point
,
679 const unsigned char *buf
, size_t len
, BN_CTX
*ctx
)
681 if (group
->meth
->oct2point
== 0)
683 ECerr(EC_F_EC_POINT_OCT2POINT
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
686 if (group
->meth
!= point
->meth
)
688 ECerr(EC_F_EC_POINT_OCT2POINT
, EC_R_INCOMPATIBLE_OBJECTS
);
691 return group
->meth
->oct2point(group
, point
, buf
, len
, ctx
);
695 int EC_POINT_add(const EC_GROUP
*group
, EC_POINT
*r
, const EC_POINT
*a
, const EC_POINT
*b
, BN_CTX
*ctx
)
697 if (group
->meth
->add
== 0)
699 ECerr(EC_F_EC_POINT_ADD
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
702 if ((group
->meth
!= r
->meth
) || (r
->meth
!= a
->meth
) || (a
->meth
!= b
->meth
))
704 ECerr(EC_F_EC_POINT_ADD
, EC_R_INCOMPATIBLE_OBJECTS
);
707 return group
->meth
->add(group
, r
, a
, b
, ctx
);
711 int EC_POINT_dbl(const EC_GROUP
*group
, EC_POINT
*r
, const EC_POINT
*a
, BN_CTX
*ctx
)
713 if (group
->meth
->dbl
== 0)
715 ECerr(EC_F_EC_POINT_DBL
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
718 if ((group
->meth
!= r
->meth
) || (r
->meth
!= a
->meth
))
720 ECerr(EC_F_EC_POINT_DBL
, EC_R_INCOMPATIBLE_OBJECTS
);
723 return group
->meth
->dbl(group
, r
, a
, ctx
);
727 int EC_POINT_invert(const EC_GROUP
*group
, EC_POINT
*a
, BN_CTX
*ctx
)
729 if (group
->meth
->dbl
== 0)
731 ECerr(EC_F_EC_POINT_DBL
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
734 if (group
->meth
!= a
->meth
)
736 ECerr(EC_F_EC_POINT_DBL
, EC_R_INCOMPATIBLE_OBJECTS
);
739 return group
->meth
->invert(group
, a
, ctx
);
743 int EC_POINT_is_at_infinity(const EC_GROUP
*group
, const EC_POINT
*point
)
745 if (group
->meth
->is_at_infinity
== 0)
747 ECerr(EC_F_EC_POINT_IS_AT_INFINITY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
750 if (group
->meth
!= point
->meth
)
752 ECerr(EC_F_EC_POINT_IS_AT_INFINITY
, EC_R_INCOMPATIBLE_OBJECTS
);
755 return group
->meth
->is_at_infinity(group
, point
);
759 int EC_POINT_is_on_curve(const EC_GROUP
*group
, const EC_POINT
*point
, BN_CTX
*ctx
)
761 if (group
->meth
->is_on_curve
== 0)
763 ECerr(EC_F_EC_POINT_IS_ON_CURVE
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
766 if (group
->meth
!= point
->meth
)
768 ECerr(EC_F_EC_POINT_IS_ON_CURVE
, EC_R_INCOMPATIBLE_OBJECTS
);
771 return group
->meth
->is_on_curve(group
, point
, ctx
);
775 int EC_POINT_cmp(const EC_GROUP
*group
, const EC_POINT
*a
, const EC_POINT
*b
, BN_CTX
*ctx
)
777 if (group
->meth
->point_cmp
== 0)
779 ECerr(EC_F_EC_POINT_CMP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
782 if ((group
->meth
!= a
->meth
) || (a
->meth
!= b
->meth
))
784 ECerr(EC_F_EC_POINT_CMP
, EC_R_INCOMPATIBLE_OBJECTS
);
787 return group
->meth
->point_cmp(group
, a
, b
, ctx
);
791 int EC_POINT_make_affine(const EC_GROUP
*group
, EC_POINT
*point
, BN_CTX
*ctx
)
793 if (group
->meth
->make_affine
== 0)
795 ECerr(EC_F_EC_POINT_MAKE_AFFINE
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
798 if (group
->meth
!= point
->meth
)
800 ECerr(EC_F_EC_POINT_MAKE_AFFINE
, EC_R_INCOMPATIBLE_OBJECTS
);
803 return group
->meth
->make_affine(group
, point
, ctx
);
807 int EC_POINTs_make_affine(const EC_GROUP
*group
, size_t num
, EC_POINT
*points
[], BN_CTX
*ctx
)
811 if (group
->meth
->points_make_affine
== 0)
813 ECerr(EC_F_EC_POINTS_MAKE_AFFINE
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
816 for (i
= 0; i
< num
; i
++)
818 if (group
->meth
!= points
[i
]->meth
)
820 ECerr(EC_F_EC_POINTS_MAKE_AFFINE
, EC_R_INCOMPATIBLE_OBJECTS
);
824 return group
->meth
->points_make_affine(group
, num
, points
, ctx
);