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diff --git a/src/lib/libcrypto/ec/ec_lib.c b/src/lib/libcrypto/ec/ec_lib.c
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1/* $OpenBSD: ec_lib.c,v 1.20 2015/10/13 15:25:18 jsing Exp $ */
2/*
3 * Originally written by Bodo Moeller for the OpenSSL project.
4 */
5/* ====================================================================
6 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * openssl-core@openssl.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58/* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * Binary polynomial ECC support in OpenSSL originally developed by
61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
62 */
63
64#include <string.h>
65
66#include <openssl/opensslconf.h>
67
68#include <openssl/err.h>
69#include <openssl/opensslv.h>
70
71#include "ec_lcl.h"
72
73/* functions for EC_GROUP objects */
74
75EC_GROUP *
76EC_GROUP_new(const EC_METHOD * meth)
77{
78 EC_GROUP *ret;
79
80 if (meth == NULL) {
81 ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL);
82 return NULL;
83 }
84 if (meth->group_init == 0) {
85 ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
86 return NULL;
87 }
88 ret = malloc(sizeof *ret);
89 if (ret == NULL) {
90 ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
91 return NULL;
92 }
93 ret->meth = meth;
94
95 ret->extra_data = NULL;
96
97 ret->generator = NULL;
98 BN_init(&ret->order);
99 BN_init(&ret->cofactor);
100
101 ret->curve_name = 0;
102 ret->asn1_flag = 0;
103 ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
104
105 ret->seed = NULL;
106 ret->seed_len = 0;
107
108 if (!meth->group_init(ret)) {
109 free(ret);
110 return NULL;
111 }
112 return ret;
113}
114
115
116void
117EC_GROUP_free(EC_GROUP * group)
118{
119 if (!group)
120 return;
121
122 if (group->meth->group_finish != 0)
123 group->meth->group_finish(group);
124
125 EC_EX_DATA_free_all_data(&group->extra_data);
126
127 EC_POINT_free(group->generator);
128 BN_free(&group->order);
129 BN_free(&group->cofactor);
130
131 free(group->seed);
132
133 free(group);
134}
135
136
137void
138EC_GROUP_clear_free(EC_GROUP * group)
139{
140 if (!group)
141 return;
142
143 if (group->meth->group_clear_finish != 0)
144 group->meth->group_clear_finish(group);
145 else if (group->meth->group_finish != 0)
146 group->meth->group_finish(group);
147
148 EC_EX_DATA_clear_free_all_data(&group->extra_data);
149
150 EC_POINT_clear_free(group->generator);
151 BN_clear_free(&group->order);
152 BN_clear_free(&group->cofactor);
153
154 if (group->seed) {
155 explicit_bzero(group->seed, group->seed_len);
156 free(group->seed);
157 }
158 explicit_bzero(group, sizeof *group);
159 free(group);
160}
161
162
163int
164EC_GROUP_copy(EC_GROUP * dest, const EC_GROUP * src)
165{
166 EC_EXTRA_DATA *d;
167
168 if (dest->meth->group_copy == 0) {
169 ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
170 return 0;
171 }
172 if (dest->meth != src->meth) {
173 ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
174 return 0;
175 }
176 if (dest == src)
177 return 1;
178
179 EC_EX_DATA_free_all_data(&dest->extra_data);
180
181 for (d = src->extra_data; d != NULL; d = d->next) {
182 void *t = d->dup_func(d->data);
183
184 if (t == NULL)
185 return 0;
186 if (!EC_EX_DATA_set_data(&dest->extra_data, t, d->dup_func,
187 d->free_func, d->clear_free_func))
188 return 0;
189 }
190
191 if (src->generator != NULL) {
192 if (dest->generator == NULL) {
193 dest->generator = EC_POINT_new(dest);
194 if (dest->generator == NULL)
195 return 0;
196 }
197 if (!EC_POINT_copy(dest->generator, src->generator))
198 return 0;
199 } else {
200 /* src->generator == NULL */
201 EC_POINT_clear_free(dest->generator);
202 dest->generator = NULL;
203 }
204
205 if (!BN_copy(&dest->order, &src->order))
206 return 0;
207 if (!BN_copy(&dest->cofactor, &src->cofactor))
208 return 0;
209
210 dest->curve_name = src->curve_name;
211 dest->asn1_flag = src->asn1_flag;
212 dest->asn1_form = src->asn1_form;
213
214 if (src->seed) {
215 free(dest->seed);
216 dest->seed = malloc(src->seed_len);
217 if (dest->seed == NULL)
218 return 0;
219 memcpy(dest->seed, src->seed, src->seed_len);
220 dest->seed_len = src->seed_len;
221 } else {
222 free(dest->seed);
223 dest->seed = NULL;
224 dest->seed_len = 0;
225 }
226
227
228 return dest->meth->group_copy(dest, src);
229}
230
231
232EC_GROUP *
233EC_GROUP_dup(const EC_GROUP * a)
234{
235 EC_GROUP *t = NULL;
236 int ok = 0;
237
238 if (a == NULL)
239 return NULL;
240
241 if ((t = EC_GROUP_new(a->meth)) == NULL)
242 return (NULL);
243 if (!EC_GROUP_copy(t, a))
244 goto err;
245
246 ok = 1;
247
248err:
249 if (!ok) {
250 EC_GROUP_free(t);
251 return NULL;
252 } else
253 return t;
254}
255
256
257const EC_METHOD *
258EC_GROUP_method_of(const EC_GROUP *group)
259{
260 return group->meth;
261}
262
263
264int
265EC_METHOD_get_field_type(const EC_METHOD *meth)
266{
267 return meth->field_type;
268}
269
270
271int
272EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
273 const BIGNUM *order, const BIGNUM *cofactor)
274{
275 if (generator == NULL) {
276 ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER);
277 return 0;
278 }
279 if (group->generator == NULL) {
280 group->generator = EC_POINT_new(group);
281 if (group->generator == NULL)
282 return 0;
283 }
284 if (!EC_POINT_copy(group->generator, generator))
285 return 0;
286
287 if (order != NULL) {
288 if (!BN_copy(&group->order, order))
289 return 0;
290 } else
291 BN_zero(&group->order);
292
293 if (cofactor != NULL) {
294 if (!BN_copy(&group->cofactor, cofactor))
295 return 0;
296 } else
297 BN_zero(&group->cofactor);
298
299 return 1;
300}
301
302
303const EC_POINT *
304EC_GROUP_get0_generator(const EC_GROUP *group)
305{
306 return group->generator;
307}
308
309
310int
311EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
312{
313 if (!BN_copy(order, &group->order))
314 return 0;
315
316 return !BN_is_zero(order);
317}
318
319
320int
321EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx)
322{
323 if (!BN_copy(cofactor, &group->cofactor))
324 return 0;
325
326 return !BN_is_zero(&group->cofactor);
327}
328
329
330void
331EC_GROUP_set_curve_name(EC_GROUP * group, int nid)
332{
333 group->curve_name = nid;
334}
335
336
337int
338EC_GROUP_get_curve_name(const EC_GROUP * group)
339{
340 return group->curve_name;
341}
342
343
344void
345EC_GROUP_set_asn1_flag(EC_GROUP * group, int flag)
346{
347 group->asn1_flag = flag;
348}
349
350
351int
352EC_GROUP_get_asn1_flag(const EC_GROUP * group)
353{
354 return group->asn1_flag;
355}
356
357
358void
359EC_GROUP_set_point_conversion_form(EC_GROUP * group,
360 point_conversion_form_t form)
361{
362 group->asn1_form = form;
363}
364
365
366point_conversion_form_t
367EC_GROUP_get_point_conversion_form(const EC_GROUP * group)
368{
369 return group->asn1_form;
370}
371
372
373size_t
374EC_GROUP_set_seed(EC_GROUP * group, const unsigned char *p, size_t len)
375{
376 if (group->seed) {
377 free(group->seed);
378 group->seed = NULL;
379 group->seed_len = 0;
380 }
381 if (!len || !p)
382 return 1;
383
384 if ((group->seed = malloc(len)) == NULL)
385 return 0;
386 memcpy(group->seed, p, len);
387 group->seed_len = len;
388
389 return len;
390}
391
392
393unsigned char *
394EC_GROUP_get0_seed(const EC_GROUP * group)
395{
396 return group->seed;
397}
398
399
400size_t
401EC_GROUP_get_seed_len(const EC_GROUP * group)
402{
403 return group->seed_len;
404}
405
406
407int
408EC_GROUP_set_curve_GFp(EC_GROUP * group, const BIGNUM * p, const BIGNUM * a,
409 const BIGNUM * b, BN_CTX * ctx)
410{
411 if (group->meth->group_set_curve == 0) {
412 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
413 return 0;
414 }
415 return group->meth->group_set_curve(group, p, a, b, ctx);
416}
417
418
419int
420EC_GROUP_get_curve_GFp(const EC_GROUP * group, BIGNUM * p, BIGNUM * a,
421 BIGNUM * b, BN_CTX * ctx)
422{
423 if (group->meth->group_get_curve == 0) {
424 ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
425 return 0;
426 }
427 return group->meth->group_get_curve(group, p, a, b, ctx);
428}
429
430#ifndef OPENSSL_NO_EC2M
431int
432EC_GROUP_set_curve_GF2m(EC_GROUP * group, const BIGNUM * p, const BIGNUM * a,
433 const BIGNUM * b, BN_CTX * ctx)
434{
435 if (group->meth->group_set_curve == 0) {
436 ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
437 return 0;
438 }
439 return group->meth->group_set_curve(group, p, a, b, ctx);
440}
441
442
443int
444EC_GROUP_get_curve_GF2m(const EC_GROUP * group, BIGNUM * p, BIGNUM * a,
445 BIGNUM * b, BN_CTX * ctx)
446{
447 if (group->meth->group_get_curve == 0) {
448 ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
449 return 0;
450 }
451 return group->meth->group_get_curve(group, p, a, b, ctx);
452}
453#endif
454
455int
456EC_GROUP_get_degree(const EC_GROUP * group)
457{
458 if (group->meth->group_get_degree == 0) {
459 ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
460 return 0;
461 }
462 return group->meth->group_get_degree(group);
463}
464
465
466int
467EC_GROUP_check_discriminant(const EC_GROUP * group, BN_CTX * ctx)
468{
469 if (group->meth->group_check_discriminant == 0) {
470 ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
471 return 0;
472 }
473 return group->meth->group_check_discriminant(group, ctx);
474}
475
476
477int
478EC_GROUP_cmp(const EC_GROUP * a, const EC_GROUP * b, BN_CTX * ctx)
479{
480 int r = 0;
481 BIGNUM *a1, *a2, *a3, *b1, *b2, *b3;
482 BN_CTX *ctx_new = NULL;
483
484 /* compare the field types */
485 if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) !=
486 EC_METHOD_get_field_type(EC_GROUP_method_of(b)))
487 return 1;
488 /* compare the curve name (if present in both) */
489 if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) &&
490 EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b))
491 return 1;
492
493 if (!ctx)
494 ctx_new = ctx = BN_CTX_new();
495 if (!ctx)
496 return -1;
497
498 BN_CTX_start(ctx);
499 if ((a1 = BN_CTX_get(ctx)) == NULL)
500 goto err;
501 if ((a2 = BN_CTX_get(ctx)) == NULL)
502 goto err;
503 if ((a3 = BN_CTX_get(ctx)) == NULL)
504 goto err;
505 if ((b1 = BN_CTX_get(ctx)) == NULL)
506 goto err;
507 if ((b2 = BN_CTX_get(ctx)) == NULL)
508 goto err;
509 if ((b3 = BN_CTX_get(ctx)) == NULL)
510 goto err;
511
512 /*
513 * XXX This approach assumes that the external representation of
514 * curves over the same field type is the same.
515 */
516 if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) ||
517 !b->meth->group_get_curve(b, b1, b2, b3, ctx))
518 r = 1;
519
520 if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3))
521 r = 1;
522
523 /* XXX EC_POINT_cmp() assumes that the methods are equal */
524 if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a),
525 EC_GROUP_get0_generator(b), ctx))
526 r = 1;
527
528 if (!r) {
529 /* compare the order and cofactor */
530 if (!EC_GROUP_get_order(a, a1, ctx) ||
531 !EC_GROUP_get_order(b, b1, ctx) ||
532 !EC_GROUP_get_cofactor(a, a2, ctx) ||
533 !EC_GROUP_get_cofactor(b, b2, ctx))
534 goto err;
535 if (BN_cmp(a1, b1) || BN_cmp(a2, b2))
536 r = 1;
537 }
538 BN_CTX_end(ctx);
539 if (ctx_new)
540 BN_CTX_free(ctx);
541
542 return r;
543
544err:
545 BN_CTX_end(ctx);
546 if (ctx_new)
547 BN_CTX_free(ctx);
548 return -1;
549}
550
551
552/* this has 'package' visibility */
553int
554EC_EX_DATA_set_data(EC_EXTRA_DATA ** ex_data, void *data,
555 void *(*dup_func) (void *),
556 void (*free_func) (void *),
557 void (*clear_free_func) (void *))
558{
559 EC_EXTRA_DATA *d;
560
561 if (ex_data == NULL)
562 return 0;
563
564 for (d = *ex_data; d != NULL; d = d->next) {
565 if (d->dup_func == dup_func && d->free_func == free_func &&
566 d->clear_free_func == clear_free_func) {
567 ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL);
568 return 0;
569 }
570 }
571
572 if (data == NULL)
573 /* no explicit entry needed */
574 return 1;
575
576 d = malloc(sizeof *d);
577 if (d == NULL)
578 return 0;
579
580 d->data = data;
581 d->dup_func = dup_func;
582 d->free_func = free_func;
583 d->clear_free_func = clear_free_func;
584
585 d->next = *ex_data;
586 *ex_data = d;
587
588 return 1;
589}
590
591/* this has 'package' visibility */
592void *
593EC_EX_DATA_get_data(const EC_EXTRA_DATA * ex_data,
594 void *(*dup_func) (void *),
595 void (*free_func) (void *),
596 void (*clear_free_func) (void *))
597{
598 const EC_EXTRA_DATA *d;
599
600 for (d = ex_data; d != NULL; d = d->next) {
601 if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func)
602 return d->data;
603 }
604
605 return NULL;
606}
607
608/* this has 'package' visibility */
609void
610EC_EX_DATA_free_data(EC_EXTRA_DATA ** ex_data,
611 void *(*dup_func) (void *),
612 void (*free_func) (void *),
613 void (*clear_free_func) (void *))
614{
615 EC_EXTRA_DATA **p;
616
617 if (ex_data == NULL)
618 return;
619
620 for (p = ex_data; *p != NULL; p = &((*p)->next)) {
621 if ((*p)->dup_func == dup_func &&
622 (*p)->free_func == free_func &&
623 (*p)->clear_free_func == clear_free_func) {
624 EC_EXTRA_DATA *next = (*p)->next;
625
626 (*p)->free_func((*p)->data);
627 free(*p);
628
629 *p = next;
630 return;
631 }
632 }
633}
634
635/* this has 'package' visibility */
636void
637EC_EX_DATA_clear_free_data(EC_EXTRA_DATA ** ex_data,
638 void *(*dup_func) (void *),
639 void (*free_func) (void *),
640 void (*clear_free_func) (void *))
641{
642 EC_EXTRA_DATA **p;
643
644 if (ex_data == NULL)
645 return;
646
647 for (p = ex_data; *p != NULL; p = &((*p)->next)) {
648 if ((*p)->dup_func == dup_func &&
649 (*p)->free_func == free_func &&
650 (*p)->clear_free_func == clear_free_func) {
651 EC_EXTRA_DATA *next = (*p)->next;
652
653 (*p)->clear_free_func((*p)->data);
654 free(*p);
655
656 *p = next;
657 return;
658 }
659 }
660}
661
662/* this has 'package' visibility */
663void
664EC_EX_DATA_free_all_data(EC_EXTRA_DATA ** ex_data)
665{
666 EC_EXTRA_DATA *d;
667
668 if (ex_data == NULL)
669 return;
670
671 d = *ex_data;
672 while (d) {
673 EC_EXTRA_DATA *next = d->next;
674
675 d->free_func(d->data);
676 free(d);
677
678 d = next;
679 }
680 *ex_data = NULL;
681}
682
683/* this has 'package' visibility */
684void
685EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA ** ex_data)
686{
687 EC_EXTRA_DATA *d;
688
689 if (ex_data == NULL)
690 return;
691
692 d = *ex_data;
693 while (d) {
694 EC_EXTRA_DATA *next = d->next;
695
696 d->clear_free_func(d->data);
697 free(d);
698
699 d = next;
700 }
701 *ex_data = NULL;
702}
703
704
705/* functions for EC_POINT objects */
706
707EC_POINT *
708EC_POINT_new(const EC_GROUP * group)
709{
710 EC_POINT *ret;
711
712 if (group == NULL) {
713 ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
714 return NULL;
715 }
716 if (group->meth->point_init == 0) {
717 ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
718 return NULL;
719 }
720 ret = malloc(sizeof *ret);
721 if (ret == NULL) {
722 ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
723 return NULL;
724 }
725 ret->meth = group->meth;
726
727 if (!ret->meth->point_init(ret)) {
728 free(ret);
729 return NULL;
730 }
731 return ret;
732}
733
734
735void
736EC_POINT_free(EC_POINT * point)
737{
738 if (!point)
739 return;
740
741 if (point->meth->point_finish != 0)
742 point->meth->point_finish(point);
743 free(point);
744}
745
746
747void
748EC_POINT_clear_free(EC_POINT * point)
749{
750 if (!point)
751 return;
752
753 if (point->meth->point_clear_finish != 0)
754 point->meth->point_clear_finish(point);
755 else if (point->meth->point_finish != 0)
756 point->meth->point_finish(point);
757 explicit_bzero(point, sizeof *point);
758 free(point);
759}
760
761
762int
763EC_POINT_copy(EC_POINT * dest, const EC_POINT * src)
764{
765 if (dest->meth->point_copy == 0) {
766 ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
767 return 0;
768 }
769 if (dest->meth != src->meth) {
770 ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
771 return 0;
772 }
773 if (dest == src)
774 return 1;
775 return dest->meth->point_copy(dest, src);
776}
777
778
779EC_POINT *
780EC_POINT_dup(const EC_POINT * a, const EC_GROUP * group)
781{
782 EC_POINT *t;
783 int r;
784
785 if (a == NULL)
786 return NULL;
787
788 t = EC_POINT_new(group);
789 if (t == NULL)
790 return (NULL);
791 r = EC_POINT_copy(t, a);
792 if (!r) {
793 EC_POINT_free(t);
794 return NULL;
795 } else
796 return t;
797}
798
799
800const EC_METHOD *
801EC_POINT_method_of(const EC_POINT * point)
802{
803 return point->meth;
804}
805
806
807int
808EC_POINT_set_to_infinity(const EC_GROUP * group, EC_POINT * point)
809{
810 if (group->meth->point_set_to_infinity == 0) {
811 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
812 return 0;
813 }
814 if (group->meth != point->meth) {
815 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
816 return 0;
817 }
818 return group->meth->point_set_to_infinity(group, point);
819}
820
821
822int
823EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
824 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
825{
826 if (group->meth->point_set_Jprojective_coordinates_GFp == 0) {
827 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
828 return 0;
829 }
830 if (group->meth != point->meth) {
831 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
832 return 0;
833 }
834 return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
835}
836
837
838int
839EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
840 const EC_POINT *point, BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
841{
842 if (group->meth->point_get_Jprojective_coordinates_GFp == 0) {
843 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
844 return 0;
845 }
846 if (group->meth != point->meth) {
847 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
848 return 0;
849 }
850 return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
851}
852
853
854int
855EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
856 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
857{
858 if (group->meth->point_set_affine_coordinates == 0) {
859 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
860 return 0;
861 }
862 if (group->meth != point->meth) {
863 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
864 return 0;
865 }
866 return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
867}
868
869#ifndef OPENSSL_NO_EC2M
870int
871EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
872 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
873{
874 if (group->meth->point_set_affine_coordinates == 0) {
875 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
876 return 0;
877 }
878 if (group->meth != point->meth) {
879 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
880 return 0;
881 }
882 return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
883}
884#endif
885
886int
887EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
888 BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
889{
890 if (group->meth->point_get_affine_coordinates == 0) {
891 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
892 return 0;
893 }
894 if (group->meth != point->meth) {
895 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
896 return 0;
897 }
898 return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
899}
900
901#ifndef OPENSSL_NO_EC2M
902int
903EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point,
904 BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
905{
906 if (group->meth->point_get_affine_coordinates == 0) {
907 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
908 return 0;
909 }
910 if (group->meth != point->meth) {
911 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
912 return 0;
913 }
914 return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
915}
916#endif
917
918int
919EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
920 const EC_POINT *b, BN_CTX *ctx)
921{
922 if (group->meth->add == 0) {
923 ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
924 return 0;
925 }
926 if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) {
927 ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
928 return 0;
929 }
930 return group->meth->add(group, r, a, b, ctx);
931}
932
933
934int
935EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
936{
937 if (group->meth->dbl == 0) {
938 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
939 return 0;
940 }
941 if ((group->meth != r->meth) || (r->meth != a->meth)) {
942 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
943 return 0;
944 }
945 return group->meth->dbl(group, r, a, ctx);
946}
947
948
949int
950EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx)
951{
952 if (group->meth->invert == 0) {
953 ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
954 return 0;
955 }
956 if (group->meth != a->meth) {
957 ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS);
958 return 0;
959 }
960 return group->meth->invert(group, a, ctx);
961}
962
963
964int
965EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
966{
967 if (group->meth->is_at_infinity == 0) {
968 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
969 return 0;
970 }
971 if (group->meth != point->meth) {
972 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
973 return 0;
974 }
975 return group->meth->is_at_infinity(group, point);
976}
977
978
979int
980EC_POINT_is_on_curve(const EC_GROUP * group, const EC_POINT * point, BN_CTX * ctx)
981{
982 if (group->meth->is_on_curve == 0) {
983 ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
984 return 0;
985 }
986 if (group->meth != point->meth) {
987 ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
988 return 0;
989 }
990 return group->meth->is_on_curve(group, point, ctx);
991}
992
993
994int
995EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
996 BN_CTX * ctx)
997{
998 if (group->meth->point_cmp == 0) {
999 ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1000 return -1;
1001 }
1002 if ((group->meth != a->meth) || (a->meth != b->meth)) {
1003 ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
1004 return -1;
1005 }
1006 return group->meth->point_cmp(group, a, b, ctx);
1007}
1008
1009
1010int
1011EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
1012{
1013 if (group->meth->make_affine == 0) {
1014 ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1015 return 0;
1016 }
1017 if (group->meth != point->meth) {
1018 ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
1019 return 0;
1020 }
1021 return group->meth->make_affine(group, point, ctx);
1022}
1023
1024
1025int
1026EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[],
1027 BN_CTX *ctx)
1028{
1029 size_t i;
1030
1031 if (group->meth->points_make_affine == 0) {
1032 ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1033 return 0;
1034 }
1035 for (i = 0; i < num; i++) {
1036 if (group->meth != points[i]->meth) {
1037 ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
1038 return 0;
1039 }
1040 }
1041 return group->meth->points_make_affine(group, num, points, ctx);
1042}
1043
1044
1045/* Functions for point multiplication.
1046 *
1047 * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c;
1048 * otherwise we dispatch through methods.
1049 */
1050
1051int
1052EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
1053 size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx)
1054{
1055 if (group->meth->mul == 0)
1056 /* use default */
1057 return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
1058
1059 return group->meth->mul(group, r, scalar, num, points, scalars, ctx);
1060}
1061
1062int
1063EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar,
1064 const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx)
1065{
1066 /* just a convenient interface to EC_POINTs_mul() */
1067
1068 const EC_POINT *points[1];
1069 const BIGNUM *scalars[1];
1070
1071 points[0] = point;
1072 scalars[0] = p_scalar;
1073
1074 return EC_POINTs_mul(group, r, g_scalar,
1075 (point != NULL && p_scalar != NULL),
1076 points, scalars, ctx);
1077}
1078
1079int
1080EC_GROUP_precompute_mult(EC_GROUP * group, BN_CTX * ctx)
1081{
1082 if (group->meth->mul == 0)
1083 /* use default */
1084 return ec_wNAF_precompute_mult(group, ctx);
1085
1086 if (group->meth->precompute_mult != 0)
1087 return group->meth->precompute_mult(group, ctx);
1088 else
1089 return 1; /* nothing to do, so report success */
1090}
1091
1092int
1093EC_GROUP_have_precompute_mult(const EC_GROUP * group)
1094{
1095 if (group->meth->mul == 0)
1096 /* use default */
1097 return ec_wNAF_have_precompute_mult(group);
1098
1099 if (group->meth->have_precompute_mult != 0)
1100 return group->meth->have_precompute_mult(group);
1101 else
1102 return 0; /* cannot tell whether precomputation has
1103 * been performed */
1104}
1105
1106EC_KEY *
1107ECParameters_dup(EC_KEY *key)
1108{
1109 unsigned char *p = NULL;
1110 EC_KEY *k = NULL;
1111 int len;
1112
1113 if (key == NULL)
1114 return (NULL);
1115
1116 if ((len = i2d_ECParameters(key, &p)) > 0)
1117 k = d2i_ECParameters(NULL, (const unsigned char **)&p, len);
1118
1119 return (k);
1120}
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