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).
55 /* ====================================================================
56 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
57 * Binary polynomial ECC support in OpenSSL originally developed by
58 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
63 #include <openssl/err.h>
64 #include <openssl/opensslv.h>
68 static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
71 /* functions for EC_GROUP objects */
73 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
79 ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
82 if (meth->group_init == 0)
84 ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
88 ret = OPENSSL_malloc(sizeof *ret);
91 ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
97 ret->extra_data = NULL;
98 ret->extra_data_dup_func = 0;
99 ret->extra_data_free_func = 0;
100 ret->extra_data_clear_free_func = 0;
102 ret->generator = NULL;
103 BN_init(&ret->order);
104 BN_init(&ret->cofactor);
108 ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
113 if (!meth->group_init(ret))
123 void EC_GROUP_free(EC_GROUP *group)
127 if (group->meth->group_finish != 0)
128 group->meth->group_finish(group);
130 EC_GROUP_free_extra_data(group);
132 if (group->generator != NULL)
133 EC_POINT_free(group->generator);
134 BN_free(&group->order);
135 BN_free(&group->cofactor);
138 OPENSSL_free(group->seed);
144 void EC_GROUP_clear_free(EC_GROUP *group)
148 if (group->meth->group_clear_finish != 0)
149 group->meth->group_clear_finish(group);
150 else if (group->meth != NULL && group->meth->group_finish != 0)
151 group->meth->group_finish(group);
153 EC_GROUP_clear_free_extra_data(group);
155 if (group->generator != NULL)
156 EC_POINT_clear_free(group->generator);
157 BN_clear_free(&group->order);
158 BN_clear_free(&group->cofactor);
162 memset(group->seed, 0, group->seed_len);
163 OPENSSL_free(group->seed);
166 memset(group, 0, sizeof *group);
171 int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
173 if (dest->meth->group_copy == 0)
175 ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
178 if (dest->meth != src->meth)
180 ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
186 EC_GROUP_clear_free_extra_data(dest);
187 if (src->extra_data_dup_func)
189 if (src->extra_data != NULL)
191 dest->extra_data = src->extra_data_dup_func(src->extra_data);
192 if (dest->extra_data == NULL)
196 dest->extra_data_dup_func = src->extra_data_dup_func;
197 dest->extra_data_free_func = src->extra_data_free_func;
198 dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
201 if (src->generator != NULL)
203 if (dest->generator == NULL)
205 dest->generator = EC_POINT_new(dest);
206 if (dest->generator == NULL) return 0;
208 if (!EC_POINT_copy(dest->generator, src->generator)) return 0;
212 /* src->generator == NULL */
213 if (dest->generator != NULL)
215 EC_POINT_clear_free(dest->generator);
216 dest->generator = NULL;
220 if (!BN_copy(&dest->order, &src->order)) return 0;
221 if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0;
223 dest->curve_name = src->curve_name;
224 dest->asn1_flag = src->asn1_flag;
225 dest->asn1_form = src->asn1_form;
230 OPENSSL_free(dest->seed);
231 dest->seed = OPENSSL_malloc(src->seed_len);
232 if (dest->seed == NULL)
234 if (!memcpy(dest->seed, src->seed, src->seed_len))
236 dest->seed_len = src->seed_len;
241 OPENSSL_free(dest->seed);
247 return dest->meth->group_copy(dest, src);
251 EC_GROUP *EC_GROUP_dup(const EC_GROUP *a)
256 if (a == NULL) return NULL;
258 if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL);
259 if (!EC_GROUP_copy(t, a)) goto err;
266 if (t) EC_GROUP_free(t);
273 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group)
279 int EC_METHOD_get_field_type(const EC_METHOD *meth)
281 return meth->field_type;
285 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
287 if (generator == NULL)
289 ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER);
293 if (group->generator == NULL)
295 group->generator = EC_POINT_new(group);
296 if (group->generator == NULL) return 0;
298 if (!EC_POINT_copy(group->generator, generator)) return 0;
301 { if (!BN_copy(&group->order, order)) return 0; }
303 { if (!BN_zero(&group->order)) return 0; }
305 if (cofactor != NULL)
306 { if (!BN_copy(&group->cofactor, cofactor)) return 0; }
308 { if (!BN_zero(&group->cofactor)) return 0; }
314 EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
316 return group->generator;
320 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
322 if (!BN_copy(order, &group->order))
325 return !BN_is_zero(order);
329 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx)
331 if (!BN_copy(cofactor, &group->cofactor))
334 return !BN_is_zero(&group->cofactor);
338 void EC_GROUP_set_nid(EC_GROUP *group, int nid)
340 group->curve_name = nid;
344 int EC_GROUP_get_nid(const EC_GROUP *group)
346 return group->curve_name;
350 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag)
352 group->asn1_flag = flag;
356 int EC_GROUP_get_asn1_flag(const EC_GROUP *group)
358 return group->asn1_flag;
362 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
363 point_conversion_form_t form)
365 group->asn1_form = form;
369 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group)
371 return group->asn1_form;
375 size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len)
379 OPENSSL_free(group->seed);
387 if ((group->seed = OPENSSL_malloc(len)) == NULL)
389 memcpy(group->seed, p, len);
390 group->seed_len = len;
396 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group)
402 size_t EC_GROUP_get_seed_len(const EC_GROUP *group)
404 return group->seed_len;
408 int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
410 if (group->meth->group_set_curve == 0)
412 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
415 return group->meth->group_set_curve(group, p, a, b, ctx);
419 int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
421 if (group->meth->group_get_curve == 0)
423 ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
426 return group->meth->group_get_curve(group, p, a, b, ctx);
430 int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
432 if (group->meth->group_set_curve == 0)
434 ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
437 return group->meth->group_set_curve(group, p, a, b, ctx);
441 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
443 if (group->meth->group_get_curve == 0)
445 ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
448 return group->meth->group_get_curve(group, p, a, b, ctx);
452 int EC_GROUP_get_degree(const EC_GROUP *group)
454 if (group->meth->group_get_degree == 0)
456 ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
459 return group->meth->group_get_degree(group);
463 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx)
465 if (group->meth->group_check_discriminant == 0)
467 ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
470 return group->meth->group_check_discriminant(group, ctx);
474 /* this has 'package' visibility */
475 int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *),
476 void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
478 if ((group->extra_data != NULL)
479 || (group->extra_data_dup_func != 0)
480 || (group->extra_data_free_func != 0)
481 || (group->extra_data_clear_free_func != 0))
483 ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
487 group->extra_data = extra_data;
488 group->extra_data_dup_func = extra_data_dup_func;
489 group->extra_data_free_func = extra_data_free_func;
490 group->extra_data_clear_free_func = extra_data_clear_free_func;
495 /* this has 'package' visibility */
496 void *EC_GROUP_get_extra_data(const EC_GROUP *group, void *(*extra_data_dup_func)(void *),
497 void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
499 if ((group->extra_data_dup_func != extra_data_dup_func)
500 || (group->extra_data_free_func != extra_data_free_func)
501 || (group->extra_data_clear_free_func != extra_data_clear_free_func))
503 ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
507 return group->extra_data;
511 /* this has 'package' visibility */
512 void EC_GROUP_free_extra_data(EC_GROUP *group)
514 if (group->extra_data_free_func)
515 group->extra_data_free_func(group->extra_data);
516 group->extra_data = NULL;
517 group->extra_data_dup_func = 0;
518 group->extra_data_free_func = 0;
519 group->extra_data_clear_free_func = 0;
523 /* this has 'package' visibility */
524 void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
526 if (group->extra_data_clear_free_func)
527 group->extra_data_clear_free_func(group->extra_data);
528 else if (group->extra_data_free_func)
529 group->extra_data_free_func(group->extra_data);
530 group->extra_data = NULL;
531 group->extra_data_dup_func = 0;
532 group->extra_data_free_func = 0;
533 group->extra_data_clear_free_func = 0;
537 /* functions for EC_POINT objects */
539 EC_POINT *EC_POINT_new(const EC_GROUP *group)
545 ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
548 if (group->meth->point_init == 0)
550 ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
554 ret = OPENSSL_malloc(sizeof *ret);
557 ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
561 ret->meth = group->meth;
563 if (!ret->meth->point_init(ret))
573 void EC_POINT_free(EC_POINT *point)
577 if (point->meth->point_finish != 0)
578 point->meth->point_finish(point);
583 void EC_POINT_clear_free(EC_POINT *point)
587 if (point->meth->point_clear_finish != 0)
588 point->meth->point_clear_finish(point);
589 else if (point->meth != NULL && point->meth->point_finish != 0)
590 point->meth->point_finish(point);
591 memset(point, 0, sizeof *point);
596 int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
598 if (dest->meth->point_copy == 0)
600 ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
603 if (dest->meth != src->meth)
605 ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
610 return dest->meth->point_copy(dest, src);
614 EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group)
619 if (a == NULL) return NULL;
621 t = EC_POINT_new(group);
622 if (t == NULL) return(NULL);
623 r = EC_POINT_copy(t, a);
633 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point)
639 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point)
641 if (group->meth->point_set_to_infinity == 0)
643 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
646 if (group->meth != point->meth)
648 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
651 return group->meth->point_set_to_infinity(group, point);
655 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
656 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
658 if (group->meth->point_set_Jprojective_coordinates == 0)
660 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
663 if (group->meth != point->meth)
665 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
668 return group->meth->point_set_Jprojective_coordinates(group, point, x, y, z, ctx);
672 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
673 BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
675 if (group->meth->point_get_Jprojective_coordinates == 0)
677 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
680 if (group->meth != point->meth)
682 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
685 return group->meth->point_get_Jprojective_coordinates(group, point, x, y, z, ctx);
689 int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
690 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
692 if (group->meth->point_set_affine_coordinates == 0)
694 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
697 if (group->meth != point->meth)
699 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
702 return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
706 int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
707 BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
709 if (group->meth->point_get_affine_coordinates == 0)
711 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
714 if (group->meth != point->meth)
716 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
719 return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
723 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
724 const BIGNUM *x, int y_bit, BN_CTX *ctx)
726 if (group->meth->point_set_compressed_coordinates == 0)
728 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
731 if (group->meth != point->meth)
733 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
736 return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx);
740 int EC_POINT_set_Jprojective_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
741 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
743 if (group->meth->point_set_Jprojective_coordinates == 0)
745 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
748 if (group->meth != point->meth)
750 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
753 return group->meth->point_set_Jprojective_coordinates(group, point, x, y, z, ctx);
757 int EC_POINT_get_Jprojective_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point,
758 BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
760 if (group->meth->point_get_Jprojective_coordinates == 0)
762 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
765 if (group->meth != point->meth)
767 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
770 return group->meth->point_get_Jprojective_coordinates(group, point, x, y, z, ctx);
774 int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
775 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
777 if (group->meth->point_set_affine_coordinates == 0)
779 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
782 if (group->meth != point->meth)
784 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
787 return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
791 int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point,
792 BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
794 if (group->meth->point_get_affine_coordinates == 0)
796 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
799 if (group->meth != point->meth)
801 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
804 return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
808 int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
809 const BIGNUM *x, int y_bit, BN_CTX *ctx)
811 if (group->meth->point_set_compressed_coordinates == 0)
813 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
816 if (group->meth != point->meth)
818 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
821 return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx);
825 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
826 unsigned char *buf, size_t len, BN_CTX *ctx)
828 if (group->meth->point2oct == 0)
830 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
833 if (group->meth != point->meth)
835 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
838 return group->meth->point2oct(group, point, form, buf, len, ctx);
842 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
843 const unsigned char *buf, size_t len, BN_CTX *ctx)
845 if (group->meth->oct2point == 0)
847 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
850 if (group->meth != point->meth)
852 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
855 return group->meth->oct2point(group, point, buf, len, ctx);
859 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
861 if (group->meth->add == 0)
863 ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
866 if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth))
868 ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
871 return group->meth->add(group, r, a, b, ctx);
875 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
877 if (group->meth->dbl == 0)
879 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
882 if ((group->meth != r->meth) || (r->meth != a->meth))
884 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
887 return group->meth->dbl(group, r, a, ctx);
891 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx)
893 if (group->meth->dbl == 0)
895 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
898 if (group->meth != a->meth)
900 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
903 return group->meth->invert(group, a, ctx);
907 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
909 if (group->meth->is_at_infinity == 0)
911 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
914 if (group->meth != point->meth)
916 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
919 return group->meth->is_at_infinity(group, point);
923 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
925 if (group->meth->is_on_curve == 0)
927 ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
930 if (group->meth != point->meth)
932 ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
935 return group->meth->is_on_curve(group, point, ctx);
939 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
941 if (group->meth->point_cmp == 0)
943 ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
946 if ((group->meth != a->meth) || (a->meth != b->meth))
948 ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
951 return group->meth->point_cmp(group, a, b, ctx);
955 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
957 if (group->meth->make_affine == 0)
959 ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
962 if (group->meth != point->meth)
964 ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
967 return group->meth->make_affine(group, point, ctx);
971 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx)
975 if (group->meth->points_make_affine == 0)
977 ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
980 for (i = 0; i < num; i++)
982 if (group->meth != points[i]->meth)
984 ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
988 return group->meth->points_make_affine(group, num, points, ctx);