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65e81670 BM |
1 | /* crypto/ec/ec_lib.c */ |
2 | /* ==================================================================== | |
4d94ae00 | 3 | * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. |
65e81670 BM |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in | |
14 | * the documentation and/or other materials provided with the | |
15 | * distribution. | |
16 | * | |
17 | * 3. All advertising materials mentioning features or use of this | |
18 | * software must display the following acknowledgment: | |
19 | * "This product includes software developed by the OpenSSL Project | |
20 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
21 | * | |
22 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
23 | * endorse or promote products derived from this software without | |
24 | * prior written permission. For written permission, please contact | |
25 | * openssl-core@openssl.org. | |
26 | * | |
27 | * 5. Products derived from this software may not be called "OpenSSL" | |
28 | * nor may "OpenSSL" appear in their names without prior written | |
29 | * permission of the OpenSSL Project. | |
30 | * | |
31 | * 6. Redistributions of any form whatsoever must retain the following | |
32 | * acknowledgment: | |
33 | * "This product includes software developed by the OpenSSL Project | |
34 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
35 | * | |
36 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
37 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
39 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
40 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
41 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
43 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
45 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
46 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
47 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 | * ==================================================================== | |
49 | * | |
50 | * This product includes cryptographic software written by Eric Young | |
51 | * (eay@cryptsoft.com). This product includes software written by Tim | |
52 | * Hudson (tjh@cryptsoft.com). | |
53 | * | |
54 | */ | |
55 | ||
c4b36ff4 BM |
56 | #include <string.h> |
57 | ||
0657bf9c | 58 | #include <openssl/err.h> |
bb62a8b0 | 59 | #include <openssl/opensslv.h> |
0657bf9c | 60 | |
65e81670 | 61 | #include "ec_lcl.h" |
0657bf9c | 62 | |
bb62a8b0 BM |
63 | static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; |
64 | ||
0657bf9c BM |
65 | |
66 | /* functions for EC_GROUP objects */ | |
67 | ||
68 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
69 | { | |
70 | EC_GROUP *ret; | |
71 | ||
72 | if (meth == NULL) | |
73 | { | |
74 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
75 | return NULL; | |
76 | } | |
77 | if (meth->group_init == 0) | |
78 | { | |
79 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
80 | return NULL; | |
81 | } | |
82 | ||
83 | ret = OPENSSL_malloc(sizeof *ret); | |
84 | if (ret == NULL) | |
85 | { | |
86 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
87 | return NULL; | |
88 | } | |
89 | ||
90 | ret->meth = meth; | |
df9cc153 BM |
91 | |
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; | |
945e15a2 | 96 | |
b6db386f BM |
97 | ret->generator = NULL; |
98 | BN_init(&ret->order); | |
99 | BN_init(&ret->cofactor); | |
100 | ||
254ef80d BM |
101 | ret->curve_name = 0; |
102 | ret->asn1_flag = 0; | |
5f3d6f70 | 103 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
458c2917 BM |
104 | |
105 | ret->seed = NULL; | |
106 | ret->seed_len = 0; | |
945e15a2 | 107 | |
0657bf9c BM |
108 | if (!meth->group_init(ret)) |
109 | { | |
110 | OPENSSL_free(ret); | |
111 | return NULL; | |
112 | } | |
113 | ||
114 | return ret; | |
115 | } | |
116 | ||
117 | ||
0657bf9c BM |
118 | void EC_GROUP_free(EC_GROUP *group) |
119 | { | |
7711de24 BM |
120 | if (!group) return; |
121 | ||
0657bf9c BM |
122 | if (group->meth->group_finish != 0) |
123 | group->meth->group_finish(group); | |
df9cc153 BM |
124 | |
125 | EC_GROUP_free_extra_data(group); | |
126 | ||
b6db386f BM |
127 | if (group->generator != NULL) |
128 | EC_POINT_free(group->generator); | |
129 | BN_free(&group->order); | |
130 | BN_free(&group->cofactor); | |
131 | ||
458c2917 BM |
132 | if (group->seed) |
133 | OPENSSL_free(group->seed); | |
134 | ||
0657bf9c BM |
135 | OPENSSL_free(group); |
136 | } | |
137 | ||
138 | ||
139 | void EC_GROUP_clear_free(EC_GROUP *group) | |
140 | { | |
7711de24 BM |
141 | if (!group) return; |
142 | ||
0657bf9c BM |
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); | |
df9cc153 BM |
147 | |
148 | EC_GROUP_clear_free_extra_data(group); | |
149 | ||
b6db386f BM |
150 | if (group->generator != NULL) |
151 | EC_POINT_clear_free(group->generator); | |
152 | BN_clear_free(&group->order); | |
153 | BN_clear_free(&group->cofactor); | |
154 | ||
458c2917 BM |
155 | if (group->seed) |
156 | { | |
157 | memset(group->seed, 0, group->seed_len); | |
158 | OPENSSL_free(group->seed); | |
159 | } | |
160 | ||
c4b36ff4 | 161 | memset(group, 0, sizeof *group); |
0657bf9c BM |
162 | OPENSSL_free(group); |
163 | } | |
164 | ||
165 | ||
166 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
167 | { | |
168 | if (dest->meth->group_copy == 0) | |
169 | { | |
170 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
171 | return 0; | |
172 | } | |
173 | if (dest->meth != src->meth) | |
174 | { | |
175 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
176 | return 0; | |
177 | } | |
1d5bd6cf BM |
178 | if (dest == src) |
179 | return 1; | |
0657bf9c | 180 | |
df9cc153 BM |
181 | EC_GROUP_clear_free_extra_data(dest); |
182 | if (src->extra_data_dup_func) | |
183 | { | |
184 | if (src->extra_data != NULL) | |
185 | { | |
186 | dest->extra_data = src->extra_data_dup_func(src->extra_data); | |
187 | if (dest->extra_data == NULL) | |
188 | return 0; | |
189 | } | |
190 | ||
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; | |
194 | } | |
195 | ||
b6db386f BM |
196 | if (src->generator != NULL) |
197 | { | |
198 | if (dest->generator == NULL) | |
199 | { | |
200 | dest->generator = EC_POINT_new(dest); | |
201 | if (dest->generator == NULL) return 0; | |
202 | } | |
203 | if (!EC_POINT_copy(dest->generator, src->generator)) return 0; | |
204 | } | |
205 | else | |
206 | { | |
207 | /* src->generator == NULL */ | |
208 | if (dest->generator != NULL) | |
209 | { | |
210 | EC_POINT_clear_free(dest->generator); | |
211 | dest->generator = NULL; | |
212 | } | |
213 | } | |
214 | ||
215 | if (!BN_copy(&dest->order, &src->order)) return 0; | |
216 | if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0; | |
217 | ||
254ef80d BM |
218 | dest->curve_name = src->curve_name; |
219 | dest->asn1_flag = src->asn1_flag; | |
220 | dest->asn1_form = src->asn1_form; | |
458c2917 BM |
221 | |
222 | if (src->seed) | |
223 | { | |
224 | if (dest->seed) | |
225 | OPENSSL_free(dest->seed); | |
226 | dest->seed = OPENSSL_malloc(src->seed_len); | |
227 | if (dest->seed == NULL) | |
228 | return 0; | |
229 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
230 | return 0; | |
231 | dest->seed_len = src->seed_len; | |
232 | } | |
233 | else | |
234 | { | |
235 | if (dest->seed) | |
236 | OPENSSL_free(dest->seed); | |
237 | dest->seed = NULL; | |
238 | dest->seed_len = 0; | |
239 | } | |
240 | ||
b6db386f | 241 | |
0657bf9c BM |
242 | return dest->meth->group_copy(dest, src); |
243 | } | |
244 | ||
245 | ||
48fe4d62 BM |
246 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
247 | { | |
248 | return group->meth; | |
249 | } | |
250 | ||
251 | ||
458c2917 BM |
252 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
253 | { | |
254 | return meth->field_type; | |
255 | } | |
256 | ||
257 | ||
b6db386f | 258 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor) |
bb62a8b0 | 259 | { |
b6db386f | 260 | if (generator == NULL) |
bb62a8b0 | 261 | { |
b6db386f BM |
262 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); |
263 | return 0 ; | |
bb62a8b0 | 264 | } |
b6db386f BM |
265 | |
266 | if (group->generator == NULL) | |
267 | { | |
268 | group->generator = EC_POINT_new(group); | |
269 | if (group->generator == NULL) return 0; | |
270 | } | |
271 | if (!EC_POINT_copy(group->generator, generator)) return 0; | |
272 | ||
273 | if (order != NULL) | |
274 | { if (!BN_copy(&group->order, order)) return 0; } | |
275 | else | |
276 | { if (!BN_zero(&group->order)) return 0; } | |
277 | ||
278 | if (cofactor != NULL) | |
279 | { if (!BN_copy(&group->cofactor, cofactor)) return 0; } | |
280 | else | |
281 | { if (!BN_zero(&group->cofactor)) return 0; } | |
282 | ||
283 | return 1; | |
bb62a8b0 BM |
284 | } |
285 | ||
286 | ||
b6db386f | 287 | EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
bb62a8b0 | 288 | { |
b6db386f | 289 | return group->generator; |
bb62a8b0 BM |
290 | } |
291 | ||
292 | ||
b6db386f | 293 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0657bf9c | 294 | { |
b6db386f | 295 | if (!BN_copy(order, &group->order)) |
0657bf9c | 296 | return 0; |
b6db386f BM |
297 | |
298 | return !BN_is_zero(order); | |
0657bf9c BM |
299 | } |
300 | ||
301 | ||
b6db386f | 302 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx) |
48fe4d62 | 303 | { |
b6db386f | 304 | if (!BN_copy(cofactor, &group->cofactor)) |
48fe4d62 | 305 | return 0; |
b6db386f BM |
306 | |
307 | return !BN_is_zero(&group->cofactor); | |
48fe4d62 BM |
308 | } |
309 | ||
310 | ||
b6db386f BM |
311 | void EC_GROUP_set_nid(EC_GROUP *group, int nid) |
312 | { | |
254ef80d | 313 | group->curve_name = nid; |
b6db386f BM |
314 | } |
315 | ||
316 | ||
317 | int EC_GROUP_get_nid(const EC_GROUP *group) | |
318 | { | |
254ef80d | 319 | return group->curve_name; |
b6db386f BM |
320 | } |
321 | ||
322 | ||
458c2917 BM |
323 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
324 | { | |
325 | group->asn1_flag = flag; | |
326 | } | |
327 | ||
328 | ||
329 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
330 | { | |
331 | return group->asn1_flag; | |
332 | } | |
333 | ||
334 | ||
254ef80d BM |
335 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
336 | point_conversion_form_t form) | |
337 | { | |
338 | group->asn1_form = form; | |
339 | } | |
340 | ||
341 | ||
342 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group) | |
343 | { | |
344 | return group->asn1_form; | |
345 | } | |
346 | ||
347 | ||
5f3d6f70 BM |
348 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
349 | { | |
350 | if (group->seed) | |
351 | { | |
352 | OPENSSL_free(group->seed); | |
353 | group->seed = NULL; | |
354 | group->seed_len = 0; | |
355 | } | |
356 | ||
357 | if (!len || !p) | |
358 | return 1; | |
359 | ||
360 | if ((group->seed = OPENSSL_malloc(len)) == NULL) | |
361 | return 0; | |
362 | memcpy(group->seed, p, len); | |
363 | group->seed_len = len; | |
364 | ||
365 | return len; | |
366 | } | |
367 | ||
368 | ||
369 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
370 | { | |
371 | return group->seed; | |
372 | } | |
373 | ||
374 | ||
375 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
376 | { | |
377 | return group->seed_len; | |
378 | } | |
379 | ||
380 | ||
b6db386f | 381 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 382 | { |
b6db386f | 383 | if (group->meth->group_set_curve_GFp == 0) |
48fe4d62 | 384 | { |
b6db386f | 385 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
386 | return 0; |
387 | } | |
b6db386f | 388 | return group->meth->group_set_curve_GFp(group, p, a, b, ctx); |
48fe4d62 BM |
389 | } |
390 | ||
391 | ||
b6db386f | 392 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 393 | { |
b6db386f | 394 | if (group->meth->group_get_curve_GFp == 0) |
48fe4d62 | 395 | { |
b6db386f | 396 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
397 | return 0; |
398 | } | |
b6db386f | 399 | return group->meth->group_get_curve_GFp(group, p, a, b, ctx); |
48fe4d62 BM |
400 | } |
401 | ||
402 | ||
17d6bb81 | 403 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
af28dd6c | 404 | { |
17d6bb81 | 405 | if (group->meth->group_check_discriminant == 0) |
af28dd6c | 406 | { |
17d6bb81 | 407 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
af28dd6c BM |
408 | return 0; |
409 | } | |
17d6bb81 | 410 | return group->meth->group_check_discriminant(group, ctx); |
af28dd6c BM |
411 | } |
412 | ||
413 | ||
df9cc153 BM |
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 *)) | |
417 | { | |
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)) | |
422 | { | |
423 | ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL); | |
424 | return 0; | |
425 | } | |
426 | ||
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; | |
431 | return 1; | |
432 | } | |
433 | ||
434 | ||
435 | /* this has 'package' visibility */ | |
48fe4d62 | 436 | void *EC_GROUP_get_extra_data(const EC_GROUP *group, void *(*extra_data_dup_func)(void *), |
df9cc153 BM |
437 | void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *)) |
438 | { | |
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)) | |
442 | { | |
443 | ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA); | |
444 | return NULL; | |
445 | } | |
446 | ||
447 | return group->extra_data; | |
448 | } | |
449 | ||
450 | ||
451 | /* this has 'package' visibility */ | |
452 | void EC_GROUP_free_extra_data(EC_GROUP *group) | |
453 | { | |
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; | |
460 | } | |
461 | ||
462 | ||
463 | /* this has 'package' visibility */ | |
464 | void EC_GROUP_clear_free_extra_data(EC_GROUP *group) | |
465 | { | |
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; | |
474 | } | |
475 | ||
0657bf9c BM |
476 | |
477 | /* functions for EC_POINT objects */ | |
478 | ||
479 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
480 | { | |
481 | EC_POINT *ret; | |
482 | ||
483 | if (group == NULL) | |
484 | { | |
485 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
486 | return NULL; | |
487 | } | |
488 | if (group->meth->point_init == 0) | |
489 | { | |
490 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | ret = OPENSSL_malloc(sizeof *ret); | |
495 | if (ret == NULL) | |
496 | { | |
497 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
498 | return NULL; | |
499 | } | |
500 | ||
501 | ret->meth = group->meth; | |
502 | ||
503 | if (!ret->meth->point_init(ret)) | |
504 | { | |
505 | OPENSSL_free(ret); | |
506 | return NULL; | |
507 | } | |
508 | ||
509 | return ret; | |
510 | } | |
511 | ||
512 | ||
513 | void EC_POINT_free(EC_POINT *point) | |
514 | { | |
7711de24 BM |
515 | if (!point) return; |
516 | ||
0657bf9c BM |
517 | if (point->meth->point_finish != 0) |
518 | point->meth->point_finish(point); | |
519 | OPENSSL_free(point); | |
520 | } | |
521 | ||
522 | ||
523 | void EC_POINT_clear_free(EC_POINT *point) | |
524 | { | |
7711de24 BM |
525 | if (!point) return; |
526 | ||
0657bf9c BM |
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); | |
f418f8c1 | 531 | memset(point, 0, sizeof *point); |
0657bf9c BM |
532 | OPENSSL_free(point); |
533 | } | |
534 | ||
535 | ||
536 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
537 | { | |
538 | if (dest->meth->point_copy == 0) | |
539 | { | |
540 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
541 | return 0; | |
542 | } | |
543 | if (dest->meth != src->meth) | |
544 | { | |
545 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
546 | return 0; | |
547 | } | |
91f29a38 BM |
548 | if (dest == src) |
549 | return 1; | |
0657bf9c BM |
550 | return dest->meth->point_copy(dest, src); |
551 | } | |
552 | ||
553 | ||
48fe4d62 BM |
554 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
555 | { | |
556 | return point->meth; | |
557 | } | |
558 | ||
559 | ||
226cc7de BM |
560 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
561 | { | |
562 | if (group->meth->point_set_to_infinity == 0) | |
563 | { | |
564 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
565 | return 0; | |
566 | } | |
567 | if (group->meth != point->meth) | |
568 | { | |
569 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
570 | return 0; | |
571 | } | |
572 | return group->meth->point_set_to_infinity(group, point); | |
573 | } | |
574 | ||
575 | ||
1d5bd6cf BM |
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) | |
578 | { | |
579 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) | |
580 | { | |
581 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
582 | return 0; | |
583 | } | |
584 | if (group->meth != point->meth) | |
585 | { | |
586 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
587 | return 0; | |
588 | } | |
589 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); | |
590 | } | |
591 | ||
592 | ||
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) | |
595 | { | |
596 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) | |
597 | { | |
598 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
599 | return 0; | |
600 | } | |
601 | if (group->meth != point->meth) | |
602 | { | |
603 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
604 | return 0; | |
605 | } | |
606 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); | |
607 | } | |
608 | ||
609 | ||
226cc7de BM |
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) | |
612 | { | |
613 | if (group->meth->point_set_affine_coordinates_GFp == 0) | |
614 | { | |
615 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
616 | return 0; | |
617 | } | |
618 | if (group->meth != point->meth) | |
619 | { | |
620 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
621 | return 0; | |
622 | } | |
623 | return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx); | |
624 | } | |
625 | ||
626 | ||
627 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
628 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
629 | { | |
630 | if (group->meth->point_get_affine_coordinates_GFp == 0) | |
631 | { | |
632 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
633 | return 0; | |
634 | } | |
635 | if (group->meth != point->meth) | |
636 | { | |
637 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
638 | return 0; | |
639 | } | |
640 | return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx); | |
641 | } | |
642 | ||
643 | ||
1d5bd6cf BM |
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) | |
646 | { | |
647 | if (group->meth->point_set_compressed_coordinates_GFp == 0) | |
648 | { | |
649 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
650 | return 0; | |
651 | } | |
652 | if (group->meth != point->meth) | |
653 | { | |
654 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
655 | return 0; | |
656 | } | |
657 | return group->meth->point_set_compressed_coordinates_GFp(group, point, x, y_bit, ctx); | |
658 | } | |
0657bf9c BM |
659 | |
660 | ||
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) | |
663 | { | |
664 | if (group->meth->point2oct == 0) | |
665 | { | |
666 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
667 | return 0; | |
668 | } | |
669 | if (group->meth != point->meth) | |
670 | { | |
671 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
672 | return 0; | |
673 | } | |
674 | return group->meth->point2oct(group, point, form, buf, len, ctx); | |
675 | } | |
676 | ||
677 | ||
678 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
679 | const unsigned char *buf, size_t len, BN_CTX *ctx) | |
680 | { | |
681 | if (group->meth->oct2point == 0) | |
682 | { | |
683 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
684 | return 0; | |
685 | } | |
686 | if (group->meth != point->meth) | |
687 | { | |
688 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
689 | return 0; | |
690 | } | |
691 | return group->meth->oct2point(group, point, buf, len, ctx); | |
692 | } | |
693 | ||
694 | ||
695 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
696 | { | |
697 | if (group->meth->add == 0) | |
698 | { | |
699 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
700 | return 0; | |
701 | } | |
702 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) | |
703 | { | |
704 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
705 | return 0; | |
706 | } | |
707 | return group->meth->add(group, r, a, b, ctx); | |
708 | } | |
709 | ||
710 | ||
711 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) | |
712 | { | |
713 | if (group->meth->dbl == 0) | |
714 | { | |
715 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
716 | return 0; | |
717 | } | |
718 | if ((group->meth != r->meth) || (r->meth != a->meth)) | |
719 | { | |
720 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
721 | return 0; | |
722 | } | |
723 | return group->meth->dbl(group, r, a, ctx); | |
724 | } | |
725 | ||
726 | ||
1d5bd6cf BM |
727 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
728 | { | |
729 | if (group->meth->dbl == 0) | |
730 | { | |
731 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
732 | return 0; | |
733 | } | |
734 | if (group->meth != a->meth) | |
735 | { | |
736 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
737 | return 0; | |
738 | } | |
739 | return group->meth->invert(group, a, ctx); | |
740 | } | |
741 | ||
742 | ||
0657bf9c BM |
743 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
744 | { | |
745 | if (group->meth->is_at_infinity == 0) | |
746 | { | |
747 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
748 | return 0; | |
749 | } | |
750 | if (group->meth != point->meth) | |
751 | { | |
752 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
753 | return 0; | |
754 | } | |
755 | return group->meth->is_at_infinity(group, point); | |
756 | } | |
757 | ||
758 | ||
759 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) | |
760 | { | |
761 | if (group->meth->is_on_curve == 0) | |
762 | { | |
763 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
764 | return 0; | |
765 | } | |
766 | if (group->meth != point->meth) | |
767 | { | |
768 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
769 | return 0; | |
770 | } | |
771 | return group->meth->is_on_curve(group, point, ctx); | |
772 | } | |
773 | ||
774 | ||
1d5bd6cf BM |
775 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
776 | { | |
777 | if (group->meth->point_cmp == 0) | |
778 | { | |
779 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
780 | return 0; | |
781 | } | |
782 | if ((group->meth != a->meth) || (a->meth != b->meth)) | |
783 | { | |
784 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
785 | return 0; | |
786 | } | |
787 | return group->meth->point_cmp(group, a, b, ctx); | |
788 | } | |
789 | ||
790 | ||
e869d4bd | 791 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0657bf9c BM |
792 | { |
793 | if (group->meth->make_affine == 0) | |
794 | { | |
795 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
796 | return 0; | |
797 | } | |
798 | if (group->meth != point->meth) | |
799 | { | |
800 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
801 | return 0; | |
802 | } | |
803 | return group->meth->make_affine(group, point, ctx); | |
804 | } | |
48fe4d62 BM |
805 | |
806 | ||
807 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) | |
808 | { | |
809 | size_t i; | |
810 | ||
811 | if (group->meth->points_make_affine == 0) | |
812 | { | |
813 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
814 | return 0; | |
815 | } | |
816 | for (i = 0; i < num; i++) | |
817 | { | |
818 | if (group->meth != points[i]->meth) | |
819 | { | |
820 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
821 | return 0; | |
822 | } | |
823 | } | |
824 | return group->meth->points_make_affine(group, num, points, ctx); | |
825 | } |