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65e81670 | 1 | /* crypto/ec/ec_lib.c */ |
35b73a1f BM |
2 | /* |
3 | * Originally written by Bodo Moeller for the OpenSSL project. | |
4 | */ | |
65e81670 | 5 | /* ==================================================================== |
37c660ff | 6 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
65e81670 BM |
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 | */ | |
7793f30e BM |
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 | */ | |
65e81670 | 63 | |
c4b36ff4 BM |
64 | #include <string.h> |
65 | ||
0657bf9c | 66 | #include <openssl/err.h> |
bb62a8b0 | 67 | #include <openssl/opensslv.h> |
0657bf9c | 68 | |
65e81670 | 69 | #include "ec_lcl.h" |
0657bf9c | 70 | |
bb62a8b0 BM |
71 | static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; |
72 | ||
0657bf9c BM |
73 | |
74 | /* functions for EC_GROUP objects */ | |
75 | ||
76 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
77 | { | |
78 | EC_GROUP *ret; | |
79 | ||
80 | if (meth == NULL) | |
81 | { | |
82 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
83 | return NULL; | |
84 | } | |
85 | if (meth->group_init == 0) | |
86 | { | |
87 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
88 | return NULL; | |
89 | } | |
90 | ||
91 | ret = OPENSSL_malloc(sizeof *ret); | |
92 | if (ret == NULL) | |
93 | { | |
94 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
95 | return NULL; | |
96 | } | |
97 | ||
98 | ret->meth = meth; | |
df9cc153 BM |
99 | |
100 | ret->extra_data = NULL; | |
945e15a2 | 101 | |
b6db386f BM |
102 | ret->generator = NULL; |
103 | BN_init(&ret->order); | |
104 | BN_init(&ret->cofactor); | |
105 | ||
254ef80d BM |
106 | ret->curve_name = 0; |
107 | ret->asn1_flag = 0; | |
5f3d6f70 | 108 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
458c2917 BM |
109 | |
110 | ret->seed = NULL; | |
111 | ret->seed_len = 0; | |
945e15a2 | 112 | |
0657bf9c BM |
113 | if (!meth->group_init(ret)) |
114 | { | |
115 | OPENSSL_free(ret); | |
116 | return NULL; | |
117 | } | |
118 | ||
119 | return ret; | |
120 | } | |
121 | ||
122 | ||
0657bf9c BM |
123 | void EC_GROUP_free(EC_GROUP *group) |
124 | { | |
7711de24 BM |
125 | if (!group) return; |
126 | ||
0657bf9c BM |
127 | if (group->meth->group_finish != 0) |
128 | group->meth->group_finish(group); | |
df9cc153 | 129 | |
ba729265 | 130 | EC_GROUP_free_all_extra_data(group); |
df9cc153 | 131 | |
b6db386f BM |
132 | if (group->generator != NULL) |
133 | EC_POINT_free(group->generator); | |
134 | BN_free(&group->order); | |
135 | BN_free(&group->cofactor); | |
136 | ||
458c2917 BM |
137 | if (group->seed) |
138 | OPENSSL_free(group->seed); | |
139 | ||
0657bf9c BM |
140 | OPENSSL_free(group); |
141 | } | |
142 | ||
143 | ||
144 | void EC_GROUP_clear_free(EC_GROUP *group) | |
145 | { | |
7711de24 BM |
146 | if (!group) return; |
147 | ||
0657bf9c BM |
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); | |
df9cc153 | 152 | |
ba729265 | 153 | EC_GROUP_clear_free_all_extra_data(group); |
df9cc153 | 154 | |
b6db386f BM |
155 | if (group->generator != NULL) |
156 | EC_POINT_clear_free(group->generator); | |
157 | BN_clear_free(&group->order); | |
158 | BN_clear_free(&group->cofactor); | |
159 | ||
458c2917 BM |
160 | if (group->seed) |
161 | { | |
4579924b | 162 | OPENSSL_cleanse(group->seed, group->seed_len); |
458c2917 BM |
163 | OPENSSL_free(group->seed); |
164 | } | |
165 | ||
4579924b | 166 | OPENSSL_cleanse(group, sizeof *group); |
0657bf9c BM |
167 | OPENSSL_free(group); |
168 | } | |
169 | ||
170 | ||
171 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
172 | { | |
ba729265 BM |
173 | EC_EXTRA_DATA *d; |
174 | ||
0657bf9c BM |
175 | if (dest->meth->group_copy == 0) |
176 | { | |
177 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
178 | return 0; | |
179 | } | |
180 | if (dest->meth != src->meth) | |
181 | { | |
182 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
183 | return 0; | |
184 | } | |
1d5bd6cf BM |
185 | if (dest == src) |
186 | return 1; | |
0657bf9c | 187 | |
ba729265 | 188 | EC_GROUP_free_all_extra_data(dest); |
df9cc153 | 189 | |
ba729265 BM |
190 | for (d = src->extra_data; d != NULL; d = d->next) |
191 | { | |
192 | void *t = d->dup_func(d->data); | |
193 | ||
194 | if (t == NULL) | |
195 | return 0; | |
196 | if (!EC_GROUP_set_extra_data(dest, t, d->dup_func, d->free_func, d->clear_free_func)) | |
197 | return 0; | |
df9cc153 BM |
198 | } |
199 | ||
b6db386f BM |
200 | if (src->generator != NULL) |
201 | { | |
202 | if (dest->generator == NULL) | |
203 | { | |
204 | dest->generator = EC_POINT_new(dest); | |
205 | if (dest->generator == NULL) return 0; | |
206 | } | |
207 | if (!EC_POINT_copy(dest->generator, src->generator)) return 0; | |
208 | } | |
209 | else | |
210 | { | |
211 | /* src->generator == NULL */ | |
212 | if (dest->generator != NULL) | |
213 | { | |
214 | EC_POINT_clear_free(dest->generator); | |
215 | dest->generator = NULL; | |
216 | } | |
217 | } | |
218 | ||
219 | if (!BN_copy(&dest->order, &src->order)) return 0; | |
220 | if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0; | |
221 | ||
254ef80d BM |
222 | dest->curve_name = src->curve_name; |
223 | dest->asn1_flag = src->asn1_flag; | |
224 | dest->asn1_form = src->asn1_form; | |
458c2917 BM |
225 | |
226 | if (src->seed) | |
227 | { | |
228 | if (dest->seed) | |
229 | OPENSSL_free(dest->seed); | |
230 | dest->seed = OPENSSL_malloc(src->seed_len); | |
231 | if (dest->seed == NULL) | |
232 | return 0; | |
233 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
234 | return 0; | |
235 | dest->seed_len = src->seed_len; | |
236 | } | |
237 | else | |
238 | { | |
239 | if (dest->seed) | |
240 | OPENSSL_free(dest->seed); | |
241 | dest->seed = NULL; | |
242 | dest->seed_len = 0; | |
243 | } | |
244 | ||
b6db386f | 245 | |
0657bf9c BM |
246 | return dest->meth->group_copy(dest, src); |
247 | } | |
248 | ||
249 | ||
7793f30e BM |
250 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
251 | { | |
252 | EC_GROUP *t = NULL; | |
253 | int ok = 0; | |
254 | ||
255 | if (a == NULL) return NULL; | |
256 | ||
257 | if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL); | |
258 | if (!EC_GROUP_copy(t, a)) goto err; | |
259 | ||
260 | ok = 1; | |
261 | ||
262 | err: | |
263 | if (!ok) | |
264 | { | |
265 | if (t) EC_GROUP_free(t); | |
266 | return NULL; | |
267 | } | |
268 | else return t; | |
269 | } | |
270 | ||
271 | ||
48fe4d62 BM |
272 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
273 | { | |
274 | return group->meth; | |
275 | } | |
276 | ||
277 | ||
458c2917 BM |
278 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
279 | { | |
280 | return meth->field_type; | |
281 | } | |
282 | ||
283 | ||
b6db386f | 284 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor) |
bb62a8b0 | 285 | { |
b6db386f | 286 | if (generator == NULL) |
bb62a8b0 | 287 | { |
b6db386f BM |
288 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); |
289 | return 0 ; | |
bb62a8b0 | 290 | } |
b6db386f BM |
291 | |
292 | if (group->generator == NULL) | |
293 | { | |
294 | group->generator = EC_POINT_new(group); | |
295 | if (group->generator == NULL) return 0; | |
296 | } | |
297 | if (!EC_POINT_copy(group->generator, generator)) return 0; | |
298 | ||
299 | if (order != NULL) | |
300 | { if (!BN_copy(&group->order, order)) return 0; } | |
301 | else | |
b6358c89 | 302 | BN_zero(&group->order); |
b6db386f BM |
303 | |
304 | if (cofactor != NULL) | |
305 | { if (!BN_copy(&group->cofactor, cofactor)) return 0; } | |
306 | else | |
b6358c89 | 307 | BN_zero(&group->cofactor); |
b6db386f BM |
308 | |
309 | return 1; | |
bb62a8b0 BM |
310 | } |
311 | ||
312 | ||
b6db386f | 313 | EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
bb62a8b0 | 314 | { |
b6db386f | 315 | return group->generator; |
bb62a8b0 BM |
316 | } |
317 | ||
318 | ||
b6db386f | 319 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0657bf9c | 320 | { |
b6db386f | 321 | if (!BN_copy(order, &group->order)) |
0657bf9c | 322 | return 0; |
b6db386f BM |
323 | |
324 | return !BN_is_zero(order); | |
0657bf9c BM |
325 | } |
326 | ||
327 | ||
b6db386f | 328 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx) |
48fe4d62 | 329 | { |
b6db386f | 330 | if (!BN_copy(cofactor, &group->cofactor)) |
48fe4d62 | 331 | return 0; |
b6db386f BM |
332 | |
333 | return !BN_is_zero(&group->cofactor); | |
48fe4d62 BM |
334 | } |
335 | ||
336 | ||
b6db386f BM |
337 | void EC_GROUP_set_nid(EC_GROUP *group, int nid) |
338 | { | |
254ef80d | 339 | group->curve_name = nid; |
b6db386f BM |
340 | } |
341 | ||
342 | ||
343 | int EC_GROUP_get_nid(const EC_GROUP *group) | |
344 | { | |
254ef80d | 345 | return group->curve_name; |
b6db386f BM |
346 | } |
347 | ||
348 | ||
458c2917 BM |
349 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
350 | { | |
351 | group->asn1_flag = flag; | |
352 | } | |
353 | ||
354 | ||
355 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
356 | { | |
357 | return group->asn1_flag; | |
358 | } | |
359 | ||
360 | ||
254ef80d BM |
361 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
362 | point_conversion_form_t form) | |
363 | { | |
364 | group->asn1_form = form; | |
365 | } | |
366 | ||
367 | ||
368 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group) | |
369 | { | |
370 | return group->asn1_form; | |
371 | } | |
372 | ||
373 | ||
5f3d6f70 BM |
374 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
375 | { | |
376 | if (group->seed) | |
377 | { | |
378 | OPENSSL_free(group->seed); | |
379 | group->seed = NULL; | |
380 | group->seed_len = 0; | |
381 | } | |
382 | ||
383 | if (!len || !p) | |
384 | return 1; | |
385 | ||
386 | if ((group->seed = OPENSSL_malloc(len)) == NULL) | |
387 | return 0; | |
388 | memcpy(group->seed, p, len); | |
389 | group->seed_len = len; | |
390 | ||
391 | return len; | |
392 | } | |
393 | ||
394 | ||
395 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
396 | { | |
397 | return group->seed; | |
398 | } | |
399 | ||
400 | ||
401 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
402 | { | |
403 | return group->seed_len; | |
404 | } | |
405 | ||
406 | ||
b6db386f | 407 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 408 | { |
7793f30e | 409 | if (group->meth->group_set_curve == 0) |
48fe4d62 | 410 | { |
b6db386f | 411 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
412 | return 0; |
413 | } | |
7793f30e | 414 | return group->meth->group_set_curve(group, p, a, b, ctx); |
48fe4d62 BM |
415 | } |
416 | ||
417 | ||
b6db386f | 418 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 419 | { |
7793f30e | 420 | if (group->meth->group_get_curve == 0) |
48fe4d62 | 421 | { |
b6db386f | 422 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
423 | return 0; |
424 | } | |
7793f30e BM |
425 | return group->meth->group_get_curve(group, p, a, b, ctx); |
426 | } | |
427 | ||
428 | ||
429 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) | |
430 | { | |
431 | if (group->meth->group_set_curve == 0) | |
432 | { | |
433 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
434 | return 0; | |
435 | } | |
436 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
437 | } | |
438 | ||
439 | ||
440 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) | |
441 | { | |
442 | if (group->meth->group_get_curve == 0) | |
443 | { | |
444 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
445 | return 0; | |
446 | } | |
447 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
448 | } | |
449 | ||
450 | ||
451 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
452 | { | |
453 | if (group->meth->group_get_degree == 0) | |
454 | { | |
455 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
456 | return 0; | |
457 | } | |
458 | return group->meth->group_get_degree(group); | |
48fe4d62 BM |
459 | } |
460 | ||
461 | ||
17d6bb81 | 462 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
af28dd6c | 463 | { |
17d6bb81 | 464 | if (group->meth->group_check_discriminant == 0) |
af28dd6c | 465 | { |
17d6bb81 | 466 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
af28dd6c BM |
467 | return 0; |
468 | } | |
17d6bb81 | 469 | return group->meth->group_check_discriminant(group, ctx); |
af28dd6c BM |
470 | } |
471 | ||
472 | ||
ada0e717 BM |
473 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
474 | { | |
475 | int r = 0; | |
476 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
477 | BN_CTX *ctx_new = NULL; | |
478 | ||
479 | /* compare the field types*/ | |
480 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
481 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
482 | return 1; | |
483 | /* compare the curve name (if present) */ | |
484 | if (EC_GROUP_get_nid(a) && EC_GROUP_get_nid(b) && | |
485 | EC_GROUP_get_nid(a) == EC_GROUP_get_nid(b)) | |
486 | return 0; | |
487 | ||
488 | if (!ctx) | |
489 | ctx_new = ctx = BN_CTX_new(); | |
490 | if (!ctx) | |
491 | return -1; | |
492 | ||
493 | BN_CTX_start(ctx); | |
494 | a1 = BN_CTX_get(ctx); | |
495 | a2 = BN_CTX_get(ctx); | |
496 | a3 = BN_CTX_get(ctx); | |
497 | b1 = BN_CTX_get(ctx); | |
498 | b2 = BN_CTX_get(ctx); | |
499 | b3 = BN_CTX_get(ctx); | |
500 | if (!b3) | |
501 | { | |
502 | BN_CTX_end(ctx); | |
503 | if (ctx_new) | |
504 | BN_CTX_free(ctx); | |
505 | return -1; | |
506 | } | |
507 | ||
508 | /* XXX This approach assumes that the external representation | |
509 | * of curves over the same field type is the same. | |
510 | */ | |
511 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
512 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
513 | r = 1; | |
514 | ||
80c808b9 | 515 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) |
ada0e717 BM |
516 | r = 1; |
517 | ||
518 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
519 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
520 | EC_GROUP_get0_generator(b), ctx)) | |
521 | r = 1; | |
522 | ||
523 | if (!r) | |
524 | { | |
525 | /* compare the order and cofactor */ | |
526 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
527 | !EC_GROUP_get_order(b, b1, ctx) || | |
528 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
529 | !EC_GROUP_get_cofactor(b, b2, ctx)) | |
530 | { | |
531 | BN_CTX_end(ctx); | |
532 | if (ctx_new) | |
533 | BN_CTX_free(ctx); | |
534 | return -1; | |
535 | } | |
536 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
537 | r = 1; | |
538 | } | |
539 | ||
540 | BN_CTX_end(ctx); | |
541 | if (ctx_new) | |
542 | BN_CTX_free(ctx); | |
543 | ||
544 | return r; | |
545 | } | |
546 | ||
547 | ||
df9cc153 | 548 | /* this has 'package' visibility */ |
ba729265 BM |
549 | int EC_GROUP_set_extra_data(EC_GROUP *group, void *data, |
550 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) | |
df9cc153 | 551 | { |
ba729265 BM |
552 | EC_EXTRA_DATA *d; |
553 | ||
554 | if (group == NULL) | |
df9cc153 | 555 | return 0; |
ba729265 BM |
556 | |
557 | for (d = group->extra_data; d != NULL; d = d->next) | |
558 | { | |
559 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) | |
560 | { | |
561 | ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL); | |
562 | return 0; | |
563 | } | |
df9cc153 BM |
564 | } |
565 | ||
ba729265 BM |
566 | if (data == NULL) |
567 | /* no explicit entry needed */ | |
568 | return 1; | |
569 | ||
570 | d = OPENSSL_malloc(sizeof *d); | |
571 | if (d == NULL) | |
572 | return 0; | |
573 | ||
574 | d->data = data; | |
575 | d->dup_func = dup_func; | |
576 | d->free_func = free_func; | |
577 | d->clear_free_func = clear_free_func; | |
578 | ||
579 | d->next = group->extra_data; | |
580 | group->extra_data = d; | |
581 | ||
df9cc153 BM |
582 | return 1; |
583 | } | |
584 | ||
df9cc153 | 585 | /* this has 'package' visibility */ |
ba729265 BM |
586 | void *EC_GROUP_get_extra_data(const EC_GROUP *group, |
587 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) | |
df9cc153 | 588 | { |
ba729265 BM |
589 | EC_EXTRA_DATA *d; |
590 | ||
591 | if (group == NULL) | |
df9cc153 | 592 | return NULL; |
ba729265 BM |
593 | |
594 | for (d = group->extra_data; d != NULL; d = d->next) | |
595 | { | |
596 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) | |
597 | return d->data; | |
df9cc153 | 598 | } |
ba729265 BM |
599 | |
600 | return NULL; | |
601 | } | |
df9cc153 | 602 | |
ba729265 BM |
603 | /* this has 'package' visibility */ |
604 | void EC_GROUP_free_extra_data(EC_GROUP *group, | |
605 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) | |
606 | { | |
607 | EC_EXTRA_DATA **p; | |
608 | ||
609 | if (group == NULL) | |
610 | return; | |
611 | ||
612 | for (p = &group->extra_data; *p != NULL; p = &((*p)->next)) | |
613 | { | |
614 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) | |
615 | { | |
616 | EC_EXTRA_DATA *next = (*p)->next; | |
617 | ||
618 | (*p)->free_func((*p)->data); | |
619 | OPENSSL_free(*p); | |
620 | ||
621 | *p = next; | |
622 | return; | |
623 | } | |
624 | } | |
df9cc153 BM |
625 | } |
626 | ||
ba729265 BM |
627 | /* this has 'package' visibility */ |
628 | void EC_GROUP_clear_free_extra_data(EC_GROUP *group, | |
629 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) | |
630 | { | |
631 | EC_EXTRA_DATA **p; | |
632 | ||
633 | if (group == NULL) | |
634 | return; | |
635 | ||
636 | for (p = &group->extra_data; *p != NULL; p = &((*p)->next)) | |
637 | { | |
638 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) | |
639 | { | |
640 | EC_EXTRA_DATA *next = (*p)->next; | |
641 | ||
642 | (*p)->clear_free_func((*p)->data); | |
643 | OPENSSL_free(*p); | |
644 | ||
645 | *p = next; | |
646 | return; | |
647 | } | |
648 | } | |
649 | } | |
df9cc153 BM |
650 | |
651 | /* this has 'package' visibility */ | |
ba729265 | 652 | void EC_GROUP_free_all_extra_data(EC_GROUP *group) |
df9cc153 | 653 | { |
ba729265 BM |
654 | EC_EXTRA_DATA *d; |
655 | ||
656 | if (group == NULL) | |
657 | return; | |
658 | ||
659 | d = group->extra_data; | |
660 | while (d) | |
661 | { | |
662 | EC_EXTRA_DATA *next = d->next; | |
663 | ||
664 | d->free_func(d->data); | |
665 | OPENSSL_free(d); | |
666 | ||
667 | d = next; | |
668 | } | |
df9cc153 | 669 | group->extra_data = NULL; |
df9cc153 BM |
670 | } |
671 | ||
df9cc153 | 672 | /* this has 'package' visibility */ |
ba729265 | 673 | void EC_GROUP_clear_free_all_extra_data(EC_GROUP *group) |
df9cc153 | 674 | { |
ba729265 BM |
675 | EC_EXTRA_DATA *d; |
676 | ||
677 | if (group == NULL) | |
678 | return; | |
679 | ||
680 | d = group->extra_data; | |
681 | while (d) | |
682 | { | |
683 | EC_EXTRA_DATA *next = d->next; | |
684 | ||
685 | d->clear_free_func(d->data); | |
686 | OPENSSL_free(d); | |
687 | ||
688 | d = next; | |
689 | } | |
df9cc153 | 690 | group->extra_data = NULL; |
df9cc153 BM |
691 | } |
692 | ||
0657bf9c BM |
693 | |
694 | /* functions for EC_POINT objects */ | |
695 | ||
696 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
697 | { | |
698 | EC_POINT *ret; | |
699 | ||
700 | if (group == NULL) | |
701 | { | |
702 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
703 | return NULL; | |
704 | } | |
705 | if (group->meth->point_init == 0) | |
706 | { | |
707 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
708 | return NULL; | |
709 | } | |
710 | ||
711 | ret = OPENSSL_malloc(sizeof *ret); | |
712 | if (ret == NULL) | |
713 | { | |
714 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
715 | return NULL; | |
716 | } | |
717 | ||
718 | ret->meth = group->meth; | |
719 | ||
720 | if (!ret->meth->point_init(ret)) | |
721 | { | |
722 | OPENSSL_free(ret); | |
723 | return NULL; | |
724 | } | |
725 | ||
726 | return ret; | |
727 | } | |
728 | ||
729 | ||
730 | void EC_POINT_free(EC_POINT *point) | |
731 | { | |
7711de24 BM |
732 | if (!point) return; |
733 | ||
0657bf9c BM |
734 | if (point->meth->point_finish != 0) |
735 | point->meth->point_finish(point); | |
736 | OPENSSL_free(point); | |
737 | } | |
738 | ||
739 | ||
740 | void EC_POINT_clear_free(EC_POINT *point) | |
741 | { | |
7711de24 BM |
742 | if (!point) return; |
743 | ||
0657bf9c BM |
744 | if (point->meth->point_clear_finish != 0) |
745 | point->meth->point_clear_finish(point); | |
746 | else if (point->meth != NULL && point->meth->point_finish != 0) | |
747 | point->meth->point_finish(point); | |
4579924b | 748 | OPENSSL_cleanse(point, sizeof *point); |
0657bf9c BM |
749 | OPENSSL_free(point); |
750 | } | |
751 | ||
752 | ||
753 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
754 | { | |
755 | if (dest->meth->point_copy == 0) | |
756 | { | |
757 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
758 | return 0; | |
759 | } | |
760 | if (dest->meth != src->meth) | |
761 | { | |
762 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
763 | return 0; | |
764 | } | |
91f29a38 BM |
765 | if (dest == src) |
766 | return 1; | |
0657bf9c BM |
767 | return dest->meth->point_copy(dest, src); |
768 | } | |
769 | ||
770 | ||
7793f30e BM |
771 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
772 | { | |
773 | EC_POINT *t; | |
774 | int r; | |
775 | ||
776 | if (a == NULL) return NULL; | |
777 | ||
778 | t = EC_POINT_new(group); | |
779 | if (t == NULL) return(NULL); | |
780 | r = EC_POINT_copy(t, a); | |
781 | if (!r) | |
782 | { | |
783 | EC_POINT_free(t); | |
784 | return NULL; | |
785 | } | |
786 | else return t; | |
787 | } | |
788 | ||
789 | ||
48fe4d62 BM |
790 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
791 | { | |
792 | return point->meth; | |
793 | } | |
794 | ||
795 | ||
226cc7de BM |
796 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
797 | { | |
798 | if (group->meth->point_set_to_infinity == 0) | |
799 | { | |
800 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
801 | return 0; | |
802 | } | |
803 | if (group->meth != point->meth) | |
804 | { | |
805 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
806 | return 0; | |
807 | } | |
808 | return group->meth->point_set_to_infinity(group, point); | |
809 | } | |
810 | ||
811 | ||
1d5bd6cf BM |
812 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
813 | const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx) | |
814 | { | |
35b73a1f | 815 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
816 | { |
817 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
818 | return 0; | |
819 | } | |
820 | if (group->meth != point->meth) | |
821 | { | |
822 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
823 | return 0; | |
824 | } | |
35b73a1f | 825 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
826 | } |
827 | ||
828 | ||
829 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
830 | BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx) | |
831 | { | |
35b73a1f | 832 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
833 | { |
834 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
835 | return 0; | |
836 | } | |
837 | if (group->meth != point->meth) | |
838 | { | |
839 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
840 | return 0; | |
841 | } | |
35b73a1f | 842 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
843 | } |
844 | ||
845 | ||
226cc7de BM |
846 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
847 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
848 | { | |
7793f30e | 849 | if (group->meth->point_set_affine_coordinates == 0) |
226cc7de BM |
850 | { |
851 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
852 | return 0; | |
853 | } | |
854 | if (group->meth != point->meth) | |
855 | { | |
856 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
857 | return 0; | |
858 | } | |
7793f30e | 859 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
226cc7de BM |
860 | } |
861 | ||
862 | ||
35b73a1f BM |
863 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, |
864 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 865 | { |
35b73a1f | 866 | if (group->meth->point_set_affine_coordinates == 0) |
7793f30e | 867 | { |
35b73a1f | 868 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
869 | return 0; |
870 | } | |
871 | if (group->meth != point->meth) | |
872 | { | |
35b73a1f | 873 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
874 | return 0; |
875 | } | |
35b73a1f | 876 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
877 | } |
878 | ||
879 | ||
35b73a1f BM |
880 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, |
881 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 882 | { |
35b73a1f | 883 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 884 | { |
35b73a1f | 885 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
886 | return 0; |
887 | } | |
888 | if (group->meth != point->meth) | |
889 | { | |
35b73a1f | 890 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
891 | return 0; |
892 | } | |
35b73a1f | 893 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
894 | } |
895 | ||
896 | ||
35b73a1f BM |
897 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point, |
898 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 899 | { |
35b73a1f | 900 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 901 | { |
35b73a1f | 902 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
903 | return 0; |
904 | } | |
905 | if (group->meth != point->meth) | |
906 | { | |
35b73a1f | 907 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
908 | return 0; |
909 | } | |
35b73a1f | 910 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
911 | } |
912 | ||
913 | ||
35b73a1f BM |
914 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
915 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
7793f30e | 916 | { |
35b73a1f | 917 | if (group->meth->point_set_compressed_coordinates == 0) |
7793f30e | 918 | { |
35b73a1f | 919 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
920 | return 0; |
921 | } | |
922 | if (group->meth != point->meth) | |
923 | { | |
35b73a1f | 924 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
925 | return 0; |
926 | } | |
35b73a1f | 927 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); |
7793f30e BM |
928 | } |
929 | ||
930 | ||
931 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, | |
932 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
933 | { | |
934 | if (group->meth->point_set_compressed_coordinates == 0) | |
935 | { | |
936 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
937 | return 0; | |
938 | } | |
939 | if (group->meth != point->meth) | |
940 | { | |
941 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); | |
942 | return 0; | |
943 | } | |
944 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); | |
1d5bd6cf | 945 | } |
0657bf9c BM |
946 | |
947 | ||
948 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, | |
949 | unsigned char *buf, size_t len, BN_CTX *ctx) | |
950 | { | |
951 | if (group->meth->point2oct == 0) | |
952 | { | |
953 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
954 | return 0; | |
955 | } | |
956 | if (group->meth != point->meth) | |
957 | { | |
958 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
959 | return 0; | |
960 | } | |
961 | return group->meth->point2oct(group, point, form, buf, len, ctx); | |
962 | } | |
963 | ||
964 | ||
965 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
966 | const unsigned char *buf, size_t len, BN_CTX *ctx) | |
967 | { | |
968 | if (group->meth->oct2point == 0) | |
969 | { | |
970 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
971 | return 0; | |
972 | } | |
973 | if (group->meth != point->meth) | |
974 | { | |
975 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
976 | return 0; | |
977 | } | |
978 | return group->meth->oct2point(group, point, buf, len, ctx); | |
979 | } | |
980 | ||
981 | ||
982 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
983 | { | |
984 | if (group->meth->add == 0) | |
985 | { | |
986 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
987 | return 0; | |
988 | } | |
989 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) | |
990 | { | |
991 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
992 | return 0; | |
993 | } | |
994 | return group->meth->add(group, r, a, b, ctx); | |
995 | } | |
996 | ||
997 | ||
998 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) | |
999 | { | |
1000 | if (group->meth->dbl == 0) | |
1001 | { | |
1002 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1003 | return 0; | |
1004 | } | |
1005 | if ((group->meth != r->meth) || (r->meth != a->meth)) | |
1006 | { | |
1007 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
1008 | return 0; | |
1009 | } | |
1010 | return group->meth->dbl(group, r, a, ctx); | |
1011 | } | |
1012 | ||
1013 | ||
1d5bd6cf BM |
1014 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
1015 | { | |
1016 | if (group->meth->dbl == 0) | |
1017 | { | |
aa4ce731 | 1018 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
1d5bd6cf BM |
1019 | return 0; |
1020 | } | |
1021 | if (group->meth != a->meth) | |
1022 | { | |
aa4ce731 | 1023 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); |
1d5bd6cf BM |
1024 | return 0; |
1025 | } | |
1026 | return group->meth->invert(group, a, ctx); | |
1027 | } | |
1028 | ||
1029 | ||
0657bf9c BM |
1030 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
1031 | { | |
1032 | if (group->meth->is_at_infinity == 0) | |
1033 | { | |
1034 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1035 | return 0; | |
1036 | } | |
1037 | if (group->meth != point->meth) | |
1038 | { | |
1039 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
1040 | return 0; | |
1041 | } | |
1042 | return group->meth->is_at_infinity(group, point); | |
1043 | } | |
1044 | ||
1045 | ||
1046 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) | |
1047 | { | |
1048 | if (group->meth->is_on_curve == 0) | |
1049 | { | |
1050 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1051 | return 0; | |
1052 | } | |
1053 | if (group->meth != point->meth) | |
1054 | { | |
1055 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
1056 | return 0; | |
1057 | } | |
1058 | return group->meth->is_on_curve(group, point, ctx); | |
1059 | } | |
1060 | ||
1061 | ||
1d5bd6cf BM |
1062 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
1063 | { | |
1064 | if (group->meth->point_cmp == 0) | |
1065 | { | |
1066 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1067 | return 0; | |
1068 | } | |
1069 | if ((group->meth != a->meth) || (a->meth != b->meth)) | |
1070 | { | |
1071 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
1072 | return 0; | |
1073 | } | |
1074 | return group->meth->point_cmp(group, a, b, ctx); | |
1075 | } | |
1076 | ||
1077 | ||
e869d4bd | 1078 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0657bf9c BM |
1079 | { |
1080 | if (group->meth->make_affine == 0) | |
1081 | { | |
1082 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1083 | return 0; | |
1084 | } | |
1085 | if (group->meth != point->meth) | |
1086 | { | |
1087 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1088 | return 0; | |
1089 | } | |
1090 | return group->meth->make_affine(group, point, ctx); | |
1091 | } | |
48fe4d62 BM |
1092 | |
1093 | ||
1094 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) | |
1095 | { | |
1096 | size_t i; | |
1097 | ||
1098 | if (group->meth->points_make_affine == 0) | |
1099 | { | |
1100 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1101 | return 0; | |
1102 | } | |
1103 | for (i = 0; i < num; i++) | |
1104 | { | |
1105 | if (group->meth != points[i]->meth) | |
1106 | { | |
1107 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1108 | return 0; | |
1109 | } | |
1110 | } | |
1111 | return group->meth->points_make_affine(group, num, points, ctx); | |
1112 | } | |
37c660ff BM |
1113 | |
1114 | ||
1115 | /* Functions for point multiplication. | |
1116 | * | |
1117 | * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c; | |
1118 | * otherwise we dispatch through methods. | |
1119 | */ | |
1120 | ||
1121 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
1122 | size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx) | |
1123 | { | |
1124 | if (group->meth->mul == 0) | |
1125 | /* use default */ | |
1126 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
1127 | ||
1128 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); | |
1129 | } | |
1130 | ||
1131 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
1132 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) | |
1133 | { | |
1134 | /* just a convenient interface to EC_POINTs_mul() */ | |
1135 | ||
1136 | const EC_POINT *points[1]; | |
1137 | const BIGNUM *scalars[1]; | |
1138 | ||
1139 | points[0] = point; | |
1140 | scalars[0] = p_scalar; | |
1141 | ||
1142 | return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx); | |
1143 | } | |
1144 | ||
1145 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
1146 | { | |
1147 | if (group->meth->mul == 0) | |
1148 | /* use default */ | |
1149 | return ec_wNAF_precompute_mult(group, ctx); | |
1150 | ||
1151 | if (group->meth->precompute_mult != 0) | |
1152 | return group->meth->precompute_mult(group, ctx); | |
1153 | else | |
1154 | return 1; /* nothing to do, so report success */ | |
1155 | } | |
1156 | ||
1157 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
1158 | { | |
1159 | if (group->meth->mul == 0) | |
1160 | /* use default */ | |
1161 | return ec_wNAF_have_precompute_mult(group); | |
1162 | ||
1163 | if (group->meth->have_precompute_mult != 0) | |
1164 | return group->meth->have_precompute_mult(group); | |
1165 | else | |
1166 | return 0; /* cannot tell whether precomputation has been performed */ | |
1167 | } |