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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 | /* ==================================================================== |
4d94ae00 | 6 | * Copyright (c) 1998-2002 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; | |
101 | ret->extra_data_dup_func = 0; | |
102 | ret->extra_data_free_func = 0; | |
103 | ret->extra_data_clear_free_func = 0; | |
945e15a2 | 104 | |
b6db386f BM |
105 | ret->generator = NULL; |
106 | BN_init(&ret->order); | |
107 | BN_init(&ret->cofactor); | |
108 | ||
254ef80d BM |
109 | ret->curve_name = 0; |
110 | ret->asn1_flag = 0; | |
5f3d6f70 | 111 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
458c2917 BM |
112 | |
113 | ret->seed = NULL; | |
114 | ret->seed_len = 0; | |
945e15a2 | 115 | |
0657bf9c BM |
116 | if (!meth->group_init(ret)) |
117 | { | |
118 | OPENSSL_free(ret); | |
119 | return NULL; | |
120 | } | |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
125 | ||
0657bf9c BM |
126 | void EC_GROUP_free(EC_GROUP *group) |
127 | { | |
7711de24 BM |
128 | if (!group) return; |
129 | ||
0657bf9c BM |
130 | if (group->meth->group_finish != 0) |
131 | group->meth->group_finish(group); | |
df9cc153 BM |
132 | |
133 | EC_GROUP_free_extra_data(group); | |
134 | ||
b6db386f BM |
135 | if (group->generator != NULL) |
136 | EC_POINT_free(group->generator); | |
137 | BN_free(&group->order); | |
138 | BN_free(&group->cofactor); | |
139 | ||
458c2917 BM |
140 | if (group->seed) |
141 | OPENSSL_free(group->seed); | |
142 | ||
0657bf9c BM |
143 | OPENSSL_free(group); |
144 | } | |
145 | ||
146 | ||
147 | void EC_GROUP_clear_free(EC_GROUP *group) | |
148 | { | |
7711de24 BM |
149 | if (!group) return; |
150 | ||
0657bf9c BM |
151 | if (group->meth->group_clear_finish != 0) |
152 | group->meth->group_clear_finish(group); | |
153 | else if (group->meth != NULL && group->meth->group_finish != 0) | |
154 | group->meth->group_finish(group); | |
df9cc153 BM |
155 | |
156 | EC_GROUP_clear_free_extra_data(group); | |
157 | ||
b6db386f BM |
158 | if (group->generator != NULL) |
159 | EC_POINT_clear_free(group->generator); | |
160 | BN_clear_free(&group->order); | |
161 | BN_clear_free(&group->cofactor); | |
162 | ||
458c2917 BM |
163 | if (group->seed) |
164 | { | |
4579924b | 165 | OPENSSL_cleanse(group->seed, group->seed_len); |
458c2917 BM |
166 | OPENSSL_free(group->seed); |
167 | } | |
168 | ||
4579924b | 169 | OPENSSL_cleanse(group, sizeof *group); |
0657bf9c BM |
170 | OPENSSL_free(group); |
171 | } | |
172 | ||
173 | ||
174 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
175 | { | |
176 | if (dest->meth->group_copy == 0) | |
177 | { | |
178 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
179 | return 0; | |
180 | } | |
181 | if (dest->meth != src->meth) | |
182 | { | |
183 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
184 | return 0; | |
185 | } | |
1d5bd6cf BM |
186 | if (dest == src) |
187 | return 1; | |
0657bf9c | 188 | |
df9cc153 BM |
189 | EC_GROUP_clear_free_extra_data(dest); |
190 | if (src->extra_data_dup_func) | |
191 | { | |
192 | if (src->extra_data != NULL) | |
193 | { | |
194 | dest->extra_data = src->extra_data_dup_func(src->extra_data); | |
195 | if (dest->extra_data == NULL) | |
196 | return 0; | |
197 | } | |
198 | ||
199 | dest->extra_data_dup_func = src->extra_data_dup_func; | |
200 | dest->extra_data_free_func = src->extra_data_free_func; | |
201 | dest->extra_data_clear_free_func = src->extra_data_clear_free_func; | |
202 | } | |
203 | ||
b6db386f BM |
204 | if (src->generator != NULL) |
205 | { | |
206 | if (dest->generator == NULL) | |
207 | { | |
208 | dest->generator = EC_POINT_new(dest); | |
209 | if (dest->generator == NULL) return 0; | |
210 | } | |
211 | if (!EC_POINT_copy(dest->generator, src->generator)) return 0; | |
212 | } | |
213 | else | |
214 | { | |
215 | /* src->generator == NULL */ | |
216 | if (dest->generator != NULL) | |
217 | { | |
218 | EC_POINT_clear_free(dest->generator); | |
219 | dest->generator = NULL; | |
220 | } | |
221 | } | |
222 | ||
223 | if (!BN_copy(&dest->order, &src->order)) return 0; | |
224 | if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0; | |
225 | ||
254ef80d BM |
226 | dest->curve_name = src->curve_name; |
227 | dest->asn1_flag = src->asn1_flag; | |
228 | dest->asn1_form = src->asn1_form; | |
458c2917 BM |
229 | |
230 | if (src->seed) | |
231 | { | |
232 | if (dest->seed) | |
233 | OPENSSL_free(dest->seed); | |
234 | dest->seed = OPENSSL_malloc(src->seed_len); | |
235 | if (dest->seed == NULL) | |
236 | return 0; | |
237 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
238 | return 0; | |
239 | dest->seed_len = src->seed_len; | |
240 | } | |
241 | else | |
242 | { | |
243 | if (dest->seed) | |
244 | OPENSSL_free(dest->seed); | |
245 | dest->seed = NULL; | |
246 | dest->seed_len = 0; | |
247 | } | |
248 | ||
b6db386f | 249 | |
0657bf9c BM |
250 | return dest->meth->group_copy(dest, src); |
251 | } | |
252 | ||
253 | ||
7793f30e BM |
254 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
255 | { | |
256 | EC_GROUP *t = NULL; | |
257 | int ok = 0; | |
258 | ||
259 | if (a == NULL) return NULL; | |
260 | ||
261 | if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL); | |
262 | if (!EC_GROUP_copy(t, a)) goto err; | |
263 | ||
264 | ok = 1; | |
265 | ||
266 | err: | |
267 | if (!ok) | |
268 | { | |
269 | if (t) EC_GROUP_free(t); | |
270 | return NULL; | |
271 | } | |
272 | else return t; | |
273 | } | |
274 | ||
275 | ||
48fe4d62 BM |
276 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
277 | { | |
278 | return group->meth; | |
279 | } | |
280 | ||
281 | ||
458c2917 BM |
282 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
283 | { | |
284 | return meth->field_type; | |
285 | } | |
286 | ||
287 | ||
b6db386f | 288 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor) |
bb62a8b0 | 289 | { |
b6db386f | 290 | if (generator == NULL) |
bb62a8b0 | 291 | { |
b6db386f BM |
292 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); |
293 | return 0 ; | |
bb62a8b0 | 294 | } |
b6db386f BM |
295 | |
296 | if (group->generator == NULL) | |
297 | { | |
298 | group->generator = EC_POINT_new(group); | |
299 | if (group->generator == NULL) return 0; | |
300 | } | |
301 | if (!EC_POINT_copy(group->generator, generator)) return 0; | |
302 | ||
303 | if (order != NULL) | |
304 | { if (!BN_copy(&group->order, order)) return 0; } | |
305 | else | |
306 | { if (!BN_zero(&group->order)) return 0; } | |
307 | ||
308 | if (cofactor != NULL) | |
309 | { if (!BN_copy(&group->cofactor, cofactor)) return 0; } | |
310 | else | |
311 | { if (!BN_zero(&group->cofactor)) return 0; } | |
312 | ||
313 | return 1; | |
bb62a8b0 BM |
314 | } |
315 | ||
316 | ||
b6db386f | 317 | EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
bb62a8b0 | 318 | { |
b6db386f | 319 | return group->generator; |
bb62a8b0 BM |
320 | } |
321 | ||
322 | ||
b6db386f | 323 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0657bf9c | 324 | { |
b6db386f | 325 | if (!BN_copy(order, &group->order)) |
0657bf9c | 326 | return 0; |
b6db386f BM |
327 | |
328 | return !BN_is_zero(order); | |
0657bf9c BM |
329 | } |
330 | ||
331 | ||
b6db386f | 332 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx) |
48fe4d62 | 333 | { |
b6db386f | 334 | if (!BN_copy(cofactor, &group->cofactor)) |
48fe4d62 | 335 | return 0; |
b6db386f BM |
336 | |
337 | return !BN_is_zero(&group->cofactor); | |
48fe4d62 BM |
338 | } |
339 | ||
340 | ||
b6db386f BM |
341 | void EC_GROUP_set_nid(EC_GROUP *group, int nid) |
342 | { | |
254ef80d | 343 | group->curve_name = nid; |
b6db386f BM |
344 | } |
345 | ||
346 | ||
347 | int EC_GROUP_get_nid(const EC_GROUP *group) | |
348 | { | |
254ef80d | 349 | return group->curve_name; |
b6db386f BM |
350 | } |
351 | ||
352 | ||
458c2917 BM |
353 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
354 | { | |
355 | group->asn1_flag = flag; | |
356 | } | |
357 | ||
358 | ||
359 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
360 | { | |
361 | return group->asn1_flag; | |
362 | } | |
363 | ||
364 | ||
254ef80d BM |
365 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
366 | point_conversion_form_t form) | |
367 | { | |
368 | group->asn1_form = form; | |
369 | } | |
370 | ||
371 | ||
372 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group) | |
373 | { | |
374 | return group->asn1_form; | |
375 | } | |
376 | ||
377 | ||
5f3d6f70 BM |
378 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
379 | { | |
380 | if (group->seed) | |
381 | { | |
382 | OPENSSL_free(group->seed); | |
383 | group->seed = NULL; | |
384 | group->seed_len = 0; | |
385 | } | |
386 | ||
387 | if (!len || !p) | |
388 | return 1; | |
389 | ||
390 | if ((group->seed = OPENSSL_malloc(len)) == NULL) | |
391 | return 0; | |
392 | memcpy(group->seed, p, len); | |
393 | group->seed_len = len; | |
394 | ||
395 | return len; | |
396 | } | |
397 | ||
398 | ||
399 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
400 | { | |
401 | return group->seed; | |
402 | } | |
403 | ||
404 | ||
405 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
406 | { | |
407 | return group->seed_len; | |
408 | } | |
409 | ||
410 | ||
b6db386f | 411 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 412 | { |
7793f30e | 413 | if (group->meth->group_set_curve == 0) |
48fe4d62 | 414 | { |
b6db386f | 415 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
416 | return 0; |
417 | } | |
7793f30e | 418 | return group->meth->group_set_curve(group, p, a, b, ctx); |
48fe4d62 BM |
419 | } |
420 | ||
421 | ||
b6db386f | 422 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) |
48fe4d62 | 423 | { |
7793f30e | 424 | if (group->meth->group_get_curve == 0) |
48fe4d62 | 425 | { |
b6db386f | 426 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
48fe4d62 BM |
427 | return 0; |
428 | } | |
7793f30e BM |
429 | return group->meth->group_get_curve(group, p, a, b, ctx); |
430 | } | |
431 | ||
432 | ||
433 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) | |
434 | { | |
435 | if (group->meth->group_set_curve == 0) | |
436 | { | |
437 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
438 | return 0; | |
439 | } | |
440 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
441 | } | |
442 | ||
443 | ||
444 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) | |
445 | { | |
446 | if (group->meth->group_get_curve == 0) | |
447 | { | |
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 | ||
454 | ||
455 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
456 | { | |
457 | if (group->meth->group_get_degree == 0) | |
458 | { | |
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); | |
48fe4d62 BM |
463 | } |
464 | ||
465 | ||
17d6bb81 | 466 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
af28dd6c | 467 | { |
17d6bb81 | 468 | if (group->meth->group_check_discriminant == 0) |
af28dd6c | 469 | { |
17d6bb81 | 470 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
af28dd6c BM |
471 | return 0; |
472 | } | |
17d6bb81 | 473 | return group->meth->group_check_discriminant(group, ctx); |
af28dd6c BM |
474 | } |
475 | ||
476 | ||
df9cc153 BM |
477 | /* this has 'package' visibility */ |
478 | int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *), | |
479 | void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *)) | |
480 | { | |
481 | if ((group->extra_data != NULL) | |
482 | || (group->extra_data_dup_func != 0) | |
483 | || (group->extra_data_free_func != 0) | |
484 | || (group->extra_data_clear_free_func != 0)) | |
485 | { | |
486 | ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | group->extra_data = extra_data; | |
491 | group->extra_data_dup_func = extra_data_dup_func; | |
492 | group->extra_data_free_func = extra_data_free_func; | |
493 | group->extra_data_clear_free_func = extra_data_clear_free_func; | |
494 | return 1; | |
495 | } | |
496 | ||
497 | ||
498 | /* this has 'package' visibility */ | |
48fe4d62 | 499 | void *EC_GROUP_get_extra_data(const EC_GROUP *group, void *(*extra_data_dup_func)(void *), |
df9cc153 BM |
500 | void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *)) |
501 | { | |
502 | if ((group->extra_data_dup_func != extra_data_dup_func) | |
503 | || (group->extra_data_free_func != extra_data_free_func) | |
504 | || (group->extra_data_clear_free_func != extra_data_clear_free_func)) | |
505 | { | |
506 | ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA); | |
507 | return NULL; | |
508 | } | |
509 | ||
510 | return group->extra_data; | |
511 | } | |
512 | ||
513 | ||
514 | /* this has 'package' visibility */ | |
515 | void EC_GROUP_free_extra_data(EC_GROUP *group) | |
516 | { | |
517 | if (group->extra_data_free_func) | |
518 | group->extra_data_free_func(group->extra_data); | |
519 | group->extra_data = NULL; | |
520 | group->extra_data_dup_func = 0; | |
521 | group->extra_data_free_func = 0; | |
522 | group->extra_data_clear_free_func = 0; | |
523 | } | |
524 | ||
525 | ||
526 | /* this has 'package' visibility */ | |
527 | void EC_GROUP_clear_free_extra_data(EC_GROUP *group) | |
528 | { | |
529 | if (group->extra_data_clear_free_func) | |
530 | group->extra_data_clear_free_func(group->extra_data); | |
531 | else if (group->extra_data_free_func) | |
532 | group->extra_data_free_func(group->extra_data); | |
533 | group->extra_data = NULL; | |
534 | group->extra_data_dup_func = 0; | |
535 | group->extra_data_free_func = 0; | |
536 | group->extra_data_clear_free_func = 0; | |
537 | } | |
538 | ||
0657bf9c BM |
539 | |
540 | /* functions for EC_POINT objects */ | |
541 | ||
542 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
543 | { | |
544 | EC_POINT *ret; | |
545 | ||
546 | if (group == NULL) | |
547 | { | |
548 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
549 | return NULL; | |
550 | } | |
551 | if (group->meth->point_init == 0) | |
552 | { | |
553 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
554 | return NULL; | |
555 | } | |
556 | ||
557 | ret = OPENSSL_malloc(sizeof *ret); | |
558 | if (ret == NULL) | |
559 | { | |
560 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
561 | return NULL; | |
562 | } | |
563 | ||
564 | ret->meth = group->meth; | |
565 | ||
566 | if (!ret->meth->point_init(ret)) | |
567 | { | |
568 | OPENSSL_free(ret); | |
569 | return NULL; | |
570 | } | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
575 | ||
576 | void EC_POINT_free(EC_POINT *point) | |
577 | { | |
7711de24 BM |
578 | if (!point) return; |
579 | ||
0657bf9c BM |
580 | if (point->meth->point_finish != 0) |
581 | point->meth->point_finish(point); | |
582 | OPENSSL_free(point); | |
583 | } | |
584 | ||
585 | ||
586 | void EC_POINT_clear_free(EC_POINT *point) | |
587 | { | |
7711de24 BM |
588 | if (!point) return; |
589 | ||
0657bf9c BM |
590 | if (point->meth->point_clear_finish != 0) |
591 | point->meth->point_clear_finish(point); | |
592 | else if (point->meth != NULL && point->meth->point_finish != 0) | |
593 | point->meth->point_finish(point); | |
4579924b | 594 | OPENSSL_cleanse(point, sizeof *point); |
0657bf9c BM |
595 | OPENSSL_free(point); |
596 | } | |
597 | ||
598 | ||
599 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
600 | { | |
601 | if (dest->meth->point_copy == 0) | |
602 | { | |
603 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
604 | return 0; | |
605 | } | |
606 | if (dest->meth != src->meth) | |
607 | { | |
608 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
609 | return 0; | |
610 | } | |
91f29a38 BM |
611 | if (dest == src) |
612 | return 1; | |
0657bf9c BM |
613 | return dest->meth->point_copy(dest, src); |
614 | } | |
615 | ||
616 | ||
7793f30e BM |
617 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
618 | { | |
619 | EC_POINT *t; | |
620 | int r; | |
621 | ||
622 | if (a == NULL) return NULL; | |
623 | ||
624 | t = EC_POINT_new(group); | |
625 | if (t == NULL) return(NULL); | |
626 | r = EC_POINT_copy(t, a); | |
627 | if (!r) | |
628 | { | |
629 | EC_POINT_free(t); | |
630 | return NULL; | |
631 | } | |
632 | else return t; | |
633 | } | |
634 | ||
635 | ||
48fe4d62 BM |
636 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
637 | { | |
638 | return point->meth; | |
639 | } | |
640 | ||
641 | ||
226cc7de BM |
642 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
643 | { | |
644 | if (group->meth->point_set_to_infinity == 0) | |
645 | { | |
646 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
647 | return 0; | |
648 | } | |
649 | if (group->meth != point->meth) | |
650 | { | |
651 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
652 | return 0; | |
653 | } | |
654 | return group->meth->point_set_to_infinity(group, point); | |
655 | } | |
656 | ||
657 | ||
1d5bd6cf BM |
658 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
659 | const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx) | |
660 | { | |
35b73a1f | 661 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
662 | { |
663 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
664 | return 0; | |
665 | } | |
666 | if (group->meth != point->meth) | |
667 | { | |
668 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
669 | return 0; | |
670 | } | |
35b73a1f | 671 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
672 | } |
673 | ||
674 | ||
675 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
676 | BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx) | |
677 | { | |
35b73a1f | 678 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
679 | { |
680 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
681 | return 0; | |
682 | } | |
683 | if (group->meth != point->meth) | |
684 | { | |
685 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
686 | return 0; | |
687 | } | |
35b73a1f | 688 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
689 | } |
690 | ||
691 | ||
226cc7de BM |
692 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
693 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
694 | { | |
7793f30e | 695 | if (group->meth->point_set_affine_coordinates == 0) |
226cc7de BM |
696 | { |
697 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
698 | return 0; | |
699 | } | |
700 | if (group->meth != point->meth) | |
701 | { | |
702 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
703 | return 0; | |
704 | } | |
7793f30e | 705 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
226cc7de BM |
706 | } |
707 | ||
708 | ||
35b73a1f BM |
709 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, |
710 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 711 | { |
35b73a1f | 712 | if (group->meth->point_set_affine_coordinates == 0) |
7793f30e | 713 | { |
35b73a1f | 714 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
715 | return 0; |
716 | } | |
717 | if (group->meth != point->meth) | |
718 | { | |
35b73a1f | 719 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
720 | return 0; |
721 | } | |
35b73a1f | 722 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
723 | } |
724 | ||
725 | ||
35b73a1f BM |
726 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, |
727 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 728 | { |
35b73a1f | 729 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 730 | { |
35b73a1f | 731 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
732 | return 0; |
733 | } | |
734 | if (group->meth != point->meth) | |
735 | { | |
35b73a1f | 736 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
737 | return 0; |
738 | } | |
35b73a1f | 739 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
740 | } |
741 | ||
742 | ||
35b73a1f BM |
743 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point, |
744 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 745 | { |
35b73a1f | 746 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 747 | { |
35b73a1f | 748 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
749 | return 0; |
750 | } | |
751 | if (group->meth != point->meth) | |
752 | { | |
35b73a1f | 753 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
754 | return 0; |
755 | } | |
35b73a1f | 756 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
757 | } |
758 | ||
759 | ||
35b73a1f BM |
760 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
761 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
7793f30e | 762 | { |
35b73a1f | 763 | if (group->meth->point_set_compressed_coordinates == 0) |
7793f30e | 764 | { |
35b73a1f | 765 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
766 | return 0; |
767 | } | |
768 | if (group->meth != point->meth) | |
769 | { | |
35b73a1f | 770 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
771 | return 0; |
772 | } | |
35b73a1f | 773 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); |
7793f30e BM |
774 | } |
775 | ||
776 | ||
777 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, | |
778 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
779 | { | |
780 | if (group->meth->point_set_compressed_coordinates == 0) | |
781 | { | |
782 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
783 | return 0; | |
784 | } | |
785 | if (group->meth != point->meth) | |
786 | { | |
787 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); | |
788 | return 0; | |
789 | } | |
790 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); | |
1d5bd6cf | 791 | } |
0657bf9c BM |
792 | |
793 | ||
794 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, | |
795 | unsigned char *buf, size_t len, BN_CTX *ctx) | |
796 | { | |
797 | if (group->meth->point2oct == 0) | |
798 | { | |
799 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
800 | return 0; | |
801 | } | |
802 | if (group->meth != point->meth) | |
803 | { | |
804 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
805 | return 0; | |
806 | } | |
807 | return group->meth->point2oct(group, point, form, buf, len, ctx); | |
808 | } | |
809 | ||
810 | ||
811 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
812 | const unsigned char *buf, size_t len, BN_CTX *ctx) | |
813 | { | |
814 | if (group->meth->oct2point == 0) | |
815 | { | |
816 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
817 | return 0; | |
818 | } | |
819 | if (group->meth != point->meth) | |
820 | { | |
821 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
822 | return 0; | |
823 | } | |
824 | return group->meth->oct2point(group, point, buf, len, ctx); | |
825 | } | |
826 | ||
827 | ||
828 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
829 | { | |
830 | if (group->meth->add == 0) | |
831 | { | |
832 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
833 | return 0; | |
834 | } | |
835 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) | |
836 | { | |
837 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
838 | return 0; | |
839 | } | |
840 | return group->meth->add(group, r, a, b, ctx); | |
841 | } | |
842 | ||
843 | ||
844 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) | |
845 | { | |
846 | if (group->meth->dbl == 0) | |
847 | { | |
848 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
849 | return 0; | |
850 | } | |
851 | if ((group->meth != r->meth) || (r->meth != a->meth)) | |
852 | { | |
853 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
854 | return 0; | |
855 | } | |
856 | return group->meth->dbl(group, r, a, ctx); | |
857 | } | |
858 | ||
859 | ||
1d5bd6cf BM |
860 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
861 | { | |
862 | if (group->meth->dbl == 0) | |
863 | { | |
864 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
865 | return 0; | |
866 | } | |
867 | if (group->meth != a->meth) | |
868 | { | |
869 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
870 | return 0; | |
871 | } | |
872 | return group->meth->invert(group, a, ctx); | |
873 | } | |
874 | ||
875 | ||
0657bf9c BM |
876 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
877 | { | |
878 | if (group->meth->is_at_infinity == 0) | |
879 | { | |
880 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
881 | return 0; | |
882 | } | |
883 | if (group->meth != point->meth) | |
884 | { | |
885 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
886 | return 0; | |
887 | } | |
888 | return group->meth->is_at_infinity(group, point); | |
889 | } | |
890 | ||
891 | ||
892 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) | |
893 | { | |
894 | if (group->meth->is_on_curve == 0) | |
895 | { | |
896 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
897 | return 0; | |
898 | } | |
899 | if (group->meth != point->meth) | |
900 | { | |
901 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
902 | return 0; | |
903 | } | |
904 | return group->meth->is_on_curve(group, point, ctx); | |
905 | } | |
906 | ||
907 | ||
1d5bd6cf BM |
908 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
909 | { | |
910 | if (group->meth->point_cmp == 0) | |
911 | { | |
912 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
913 | return 0; | |
914 | } | |
915 | if ((group->meth != a->meth) || (a->meth != b->meth)) | |
916 | { | |
917 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
918 | return 0; | |
919 | } | |
920 | return group->meth->point_cmp(group, a, b, ctx); | |
921 | } | |
922 | ||
923 | ||
e869d4bd | 924 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0657bf9c BM |
925 | { |
926 | if (group->meth->make_affine == 0) | |
927 | { | |
928 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
929 | return 0; | |
930 | } | |
931 | if (group->meth != point->meth) | |
932 | { | |
933 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
934 | return 0; | |
935 | } | |
936 | return group->meth->make_affine(group, point, ctx); | |
937 | } | |
48fe4d62 BM |
938 | |
939 | ||
940 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) | |
941 | { | |
942 | size_t i; | |
943 | ||
944 | if (group->meth->points_make_affine == 0) | |
945 | { | |
946 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
947 | return 0; | |
948 | } | |
949 | for (i = 0; i < num; i++) | |
950 | { | |
951 | if (group->meth != points[i]->meth) | |
952 | { | |
953 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
954 | return 0; | |
955 | } | |
956 | } | |
957 | return group->meth->points_make_affine(group, num, points, ctx); | |
958 | } |