]>
Commit | Line | Data |
---|---|---|
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 | { | |
739a543e | 82 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); |
0657bf9c BM |
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 | |
9dd84053 | 130 | EC_EX_DATA_free_all_data(&group->extra_data); |
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); | |
bbab9b61 | 150 | else if (group->meth->group_finish != 0) |
0657bf9c | 151 | group->meth->group_finish(group); |
df9cc153 | 152 | |
9dd84053 | 153 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
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 | |
9dd84053 | 188 | EC_EX_DATA_free_all_data(&dest->extra_data); |
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; | |
9dd84053 | 196 | if (!EC_EX_DATA_set_data(&dest->extra_data, t, d->dup_func, d->free_func, d->clear_free_func)) |
ba729265 | 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 | ||
9dd84053 | 313 | const 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 | ||
7dc17a6c | 337 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
b6db386f | 338 | { |
254ef80d | 339 | group->curve_name = nid; |
b6db386f BM |
340 | } |
341 | ||
342 | ||
7dc17a6c | 343 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
b6db386f | 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) */ | |
7dc17a6c NL |
484 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && |
485 | EC_GROUP_get_curve_name(a) == EC_GROUP_get_curve_name(b)) | |
ada0e717 BM |
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 */ |
9dd84053 | 549 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
ba729265 | 550 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
df9cc153 | 551 | { |
ba729265 BM |
552 | EC_EXTRA_DATA *d; |
553 | ||
9dd84053 | 554 | if (ex_data == NULL) |
df9cc153 | 555 | return 0; |
ba729265 | 556 | |
9dd84053 | 557 | for (d = *ex_data; d != NULL; d = d->next) |
ba729265 BM |
558 | { |
559 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) | |
560 | { | |
137023dd | 561 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); |
ba729265 BM |
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 | ||
9dd84053 NL |
579 | d->next = *ex_data; |
580 | *ex_data = d; | |
ba729265 | 581 | |
df9cc153 BM |
582 | return 1; |
583 | } | |
584 | ||
df9cc153 | 585 | /* this has 'package' visibility */ |
9dd84053 | 586 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
ba729265 | 587 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
df9cc153 | 588 | { |
9dd84053 | 589 | const EC_EXTRA_DATA *d; |
ba729265 | 590 | |
9dd84053 | 591 | for (d = ex_data; d != NULL; d = d->next) |
ba729265 BM |
592 | { |
593 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) | |
594 | return d->data; | |
df9cc153 | 595 | } |
ba729265 BM |
596 | |
597 | return NULL; | |
598 | } | |
df9cc153 | 599 | |
ba729265 | 600 | /* this has 'package' visibility */ |
9dd84053 | 601 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
ba729265 BM |
602 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
603 | { | |
604 | EC_EXTRA_DATA **p; | |
605 | ||
9dd84053 | 606 | if (ex_data == NULL) |
ba729265 BM |
607 | return; |
608 | ||
9dd84053 | 609 | for (p = ex_data; *p != NULL; p = &((*p)->next)) |
ba729265 BM |
610 | { |
611 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) | |
612 | { | |
613 | EC_EXTRA_DATA *next = (*p)->next; | |
614 | ||
615 | (*p)->free_func((*p)->data); | |
616 | OPENSSL_free(*p); | |
617 | ||
618 | *p = next; | |
619 | return; | |
620 | } | |
621 | } | |
df9cc153 BM |
622 | } |
623 | ||
ba729265 | 624 | /* this has 'package' visibility */ |
bbbd6710 | 625 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
ba729265 BM |
626 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
627 | { | |
628 | EC_EXTRA_DATA **p; | |
629 | ||
9dd84053 | 630 | if (ex_data == NULL) |
ba729265 BM |
631 | return; |
632 | ||
9dd84053 | 633 | for (p = ex_data; *p != NULL; p = &((*p)->next)) |
ba729265 BM |
634 | { |
635 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) | |
636 | { | |
637 | EC_EXTRA_DATA *next = (*p)->next; | |
638 | ||
639 | (*p)->clear_free_func((*p)->data); | |
640 | OPENSSL_free(*p); | |
641 | ||
642 | *p = next; | |
643 | return; | |
644 | } | |
645 | } | |
646 | } | |
df9cc153 BM |
647 | |
648 | /* this has 'package' visibility */ | |
9dd84053 | 649 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
df9cc153 | 650 | { |
ba729265 BM |
651 | EC_EXTRA_DATA *d; |
652 | ||
9dd84053 | 653 | if (ex_data == NULL) |
ba729265 BM |
654 | return; |
655 | ||
9dd84053 | 656 | d = *ex_data; |
ba729265 BM |
657 | while (d) |
658 | { | |
659 | EC_EXTRA_DATA *next = d->next; | |
660 | ||
661 | d->free_func(d->data); | |
662 | OPENSSL_free(d); | |
663 | ||
664 | d = next; | |
665 | } | |
9dd84053 | 666 | *ex_data = NULL; |
df9cc153 BM |
667 | } |
668 | ||
df9cc153 | 669 | /* this has 'package' visibility */ |
9dd84053 | 670 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
df9cc153 | 671 | { |
ba729265 BM |
672 | EC_EXTRA_DATA *d; |
673 | ||
9dd84053 | 674 | if (ex_data == NULL) |
ba729265 BM |
675 | return; |
676 | ||
9dd84053 | 677 | d = *ex_data; |
ba729265 BM |
678 | while (d) |
679 | { | |
680 | EC_EXTRA_DATA *next = d->next; | |
681 | ||
682 | d->clear_free_func(d->data); | |
683 | OPENSSL_free(d); | |
684 | ||
685 | d = next; | |
686 | } | |
9dd84053 | 687 | *ex_data = NULL; |
df9cc153 BM |
688 | } |
689 | ||
0657bf9c BM |
690 | |
691 | /* functions for EC_POINT objects */ | |
692 | ||
693 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
694 | { | |
695 | EC_POINT *ret; | |
696 | ||
697 | if (group == NULL) | |
698 | { | |
699 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
700 | return NULL; | |
701 | } | |
702 | if (group->meth->point_init == 0) | |
703 | { | |
704 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
705 | return NULL; | |
706 | } | |
707 | ||
708 | ret = OPENSSL_malloc(sizeof *ret); | |
709 | if (ret == NULL) | |
710 | { | |
711 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
712 | return NULL; | |
713 | } | |
714 | ||
715 | ret->meth = group->meth; | |
716 | ||
717 | if (!ret->meth->point_init(ret)) | |
718 | { | |
719 | OPENSSL_free(ret); | |
720 | return NULL; | |
721 | } | |
722 | ||
723 | return ret; | |
724 | } | |
725 | ||
726 | ||
727 | void EC_POINT_free(EC_POINT *point) | |
728 | { | |
7711de24 BM |
729 | if (!point) return; |
730 | ||
0657bf9c BM |
731 | if (point->meth->point_finish != 0) |
732 | point->meth->point_finish(point); | |
733 | OPENSSL_free(point); | |
734 | } | |
735 | ||
736 | ||
737 | void EC_POINT_clear_free(EC_POINT *point) | |
738 | { | |
7711de24 BM |
739 | if (!point) return; |
740 | ||
0657bf9c BM |
741 | if (point->meth->point_clear_finish != 0) |
742 | point->meth->point_clear_finish(point); | |
67b6f1ca | 743 | else if (point->meth->point_finish != 0) |
0657bf9c | 744 | point->meth->point_finish(point); |
4579924b | 745 | OPENSSL_cleanse(point, sizeof *point); |
0657bf9c BM |
746 | OPENSSL_free(point); |
747 | } | |
748 | ||
749 | ||
750 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
751 | { | |
752 | if (dest->meth->point_copy == 0) | |
753 | { | |
754 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
755 | return 0; | |
756 | } | |
757 | if (dest->meth != src->meth) | |
758 | { | |
759 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
760 | return 0; | |
761 | } | |
91f29a38 BM |
762 | if (dest == src) |
763 | return 1; | |
0657bf9c BM |
764 | return dest->meth->point_copy(dest, src); |
765 | } | |
766 | ||
767 | ||
7793f30e BM |
768 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
769 | { | |
770 | EC_POINT *t; | |
771 | int r; | |
772 | ||
773 | if (a == NULL) return NULL; | |
774 | ||
775 | t = EC_POINT_new(group); | |
776 | if (t == NULL) return(NULL); | |
777 | r = EC_POINT_copy(t, a); | |
778 | if (!r) | |
779 | { | |
780 | EC_POINT_free(t); | |
781 | return NULL; | |
782 | } | |
783 | else return t; | |
784 | } | |
785 | ||
786 | ||
48fe4d62 BM |
787 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
788 | { | |
789 | return point->meth; | |
790 | } | |
791 | ||
792 | ||
226cc7de BM |
793 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
794 | { | |
795 | if (group->meth->point_set_to_infinity == 0) | |
796 | { | |
797 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
798 | return 0; | |
799 | } | |
800 | if (group->meth != point->meth) | |
801 | { | |
802 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
803 | return 0; | |
804 | } | |
805 | return group->meth->point_set_to_infinity(group, point); | |
806 | } | |
807 | ||
808 | ||
1d5bd6cf BM |
809 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
810 | const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx) | |
811 | { | |
35b73a1f | 812 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
813 | { |
814 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
815 | return 0; | |
816 | } | |
817 | if (group->meth != point->meth) | |
818 | { | |
819 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
820 | return 0; | |
821 | } | |
35b73a1f | 822 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
823 | } |
824 | ||
825 | ||
826 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
827 | BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx) | |
828 | { | |
35b73a1f | 829 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) |
1d5bd6cf BM |
830 | { |
831 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
832 | return 0; | |
833 | } | |
834 | if (group->meth != point->meth) | |
835 | { | |
836 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
837 | return 0; | |
838 | } | |
35b73a1f | 839 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
1d5bd6cf BM |
840 | } |
841 | ||
842 | ||
226cc7de BM |
843 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
844 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
845 | { | |
7793f30e | 846 | if (group->meth->point_set_affine_coordinates == 0) |
226cc7de BM |
847 | { |
848 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
849 | return 0; | |
850 | } | |
851 | if (group->meth != point->meth) | |
852 | { | |
853 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
854 | return 0; | |
855 | } | |
7793f30e | 856 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
226cc7de BM |
857 | } |
858 | ||
859 | ||
35b73a1f BM |
860 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, |
861 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 862 | { |
35b73a1f | 863 | if (group->meth->point_set_affine_coordinates == 0) |
7793f30e | 864 | { |
35b73a1f | 865 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
866 | return 0; |
867 | } | |
868 | if (group->meth != point->meth) | |
869 | { | |
35b73a1f | 870 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
871 | return 0; |
872 | } | |
35b73a1f | 873 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
874 | } |
875 | ||
876 | ||
35b73a1f BM |
877 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, |
878 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 879 | { |
35b73a1f | 880 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 881 | { |
35b73a1f | 882 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
883 | return 0; |
884 | } | |
885 | if (group->meth != point->meth) | |
886 | { | |
35b73a1f | 887 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
888 | return 0; |
889 | } | |
35b73a1f | 890 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
891 | } |
892 | ||
893 | ||
35b73a1f BM |
894 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point, |
895 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
7793f30e | 896 | { |
35b73a1f | 897 | if (group->meth->point_get_affine_coordinates == 0) |
7793f30e | 898 | { |
35b73a1f | 899 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
900 | return 0; |
901 | } | |
902 | if (group->meth != point->meth) | |
903 | { | |
35b73a1f | 904 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
905 | return 0; |
906 | } | |
35b73a1f | 907 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
7793f30e BM |
908 | } |
909 | ||
910 | ||
35b73a1f BM |
911 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
912 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
7793f30e | 913 | { |
35b73a1f | 914 | if (group->meth->point_set_compressed_coordinates == 0) |
7793f30e | 915 | { |
35b73a1f | 916 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
7793f30e BM |
917 | return 0; |
918 | } | |
919 | if (group->meth != point->meth) | |
920 | { | |
35b73a1f | 921 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
7793f30e BM |
922 | return 0; |
923 | } | |
35b73a1f | 924 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); |
7793f30e BM |
925 | } |
926 | ||
927 | ||
928 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, | |
929 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
930 | { | |
931 | if (group->meth->point_set_compressed_coordinates == 0) | |
932 | { | |
933 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
934 | return 0; | |
935 | } | |
936 | if (group->meth != point->meth) | |
937 | { | |
938 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); | |
939 | return 0; | |
940 | } | |
941 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); | |
1d5bd6cf | 942 | } |
0657bf9c BM |
943 | |
944 | ||
945 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, | |
946 | unsigned char *buf, size_t len, BN_CTX *ctx) | |
947 | { | |
948 | if (group->meth->point2oct == 0) | |
949 | { | |
950 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
951 | return 0; | |
952 | } | |
953 | if (group->meth != point->meth) | |
954 | { | |
955 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
956 | return 0; | |
957 | } | |
958 | return group->meth->point2oct(group, point, form, buf, len, ctx); | |
959 | } | |
960 | ||
961 | ||
962 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
963 | const unsigned char *buf, size_t len, BN_CTX *ctx) | |
964 | { | |
965 | if (group->meth->oct2point == 0) | |
966 | { | |
967 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
968 | return 0; | |
969 | } | |
970 | if (group->meth != point->meth) | |
971 | { | |
972 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
973 | return 0; | |
974 | } | |
975 | return group->meth->oct2point(group, point, buf, len, ctx); | |
976 | } | |
977 | ||
978 | ||
979 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
980 | { | |
981 | if (group->meth->add == 0) | |
982 | { | |
983 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
984 | return 0; | |
985 | } | |
986 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) | |
987 | { | |
988 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
989 | return 0; | |
990 | } | |
991 | return group->meth->add(group, r, a, b, ctx); | |
992 | } | |
993 | ||
994 | ||
995 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) | |
996 | { | |
997 | if (group->meth->dbl == 0) | |
998 | { | |
999 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1000 | return 0; | |
1001 | } | |
1002 | if ((group->meth != r->meth) || (r->meth != a->meth)) | |
1003 | { | |
1004 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
1005 | return 0; | |
1006 | } | |
1007 | return group->meth->dbl(group, r, a, ctx); | |
1008 | } | |
1009 | ||
1010 | ||
1d5bd6cf BM |
1011 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
1012 | { | |
1013 | if (group->meth->dbl == 0) | |
1014 | { | |
aa4ce731 | 1015 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
1d5bd6cf BM |
1016 | return 0; |
1017 | } | |
1018 | if (group->meth != a->meth) | |
1019 | { | |
aa4ce731 | 1020 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); |
1d5bd6cf BM |
1021 | return 0; |
1022 | } | |
1023 | return group->meth->invert(group, a, ctx); | |
1024 | } | |
1025 | ||
1026 | ||
0657bf9c BM |
1027 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
1028 | { | |
1029 | if (group->meth->is_at_infinity == 0) | |
1030 | { | |
1031 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1032 | return 0; | |
1033 | } | |
1034 | if (group->meth != point->meth) | |
1035 | { | |
1036 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
1037 | return 0; | |
1038 | } | |
1039 | return group->meth->is_at_infinity(group, point); | |
1040 | } | |
1041 | ||
1042 | ||
1043 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) | |
1044 | { | |
1045 | if (group->meth->is_on_curve == 0) | |
1046 | { | |
1047 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1048 | return 0; | |
1049 | } | |
1050 | if (group->meth != point->meth) | |
1051 | { | |
1052 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
1053 | return 0; | |
1054 | } | |
1055 | return group->meth->is_on_curve(group, point, ctx); | |
1056 | } | |
1057 | ||
1058 | ||
1d5bd6cf BM |
1059 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
1060 | { | |
1061 | if (group->meth->point_cmp == 0) | |
1062 | { | |
1063 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1064 | return 0; | |
1065 | } | |
1066 | if ((group->meth != a->meth) || (a->meth != b->meth)) | |
1067 | { | |
1068 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
1069 | return 0; | |
1070 | } | |
1071 | return group->meth->point_cmp(group, a, b, ctx); | |
1072 | } | |
1073 | ||
1074 | ||
e869d4bd | 1075 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0657bf9c BM |
1076 | { |
1077 | if (group->meth->make_affine == 0) | |
1078 | { | |
1079 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1080 | return 0; | |
1081 | } | |
1082 | if (group->meth != point->meth) | |
1083 | { | |
1084 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1085 | return 0; | |
1086 | } | |
1087 | return group->meth->make_affine(group, point, ctx); | |
1088 | } | |
48fe4d62 BM |
1089 | |
1090 | ||
1091 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) | |
1092 | { | |
1093 | size_t i; | |
1094 | ||
1095 | if (group->meth->points_make_affine == 0) | |
1096 | { | |
1097 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1098 | return 0; | |
1099 | } | |
1100 | for (i = 0; i < num; i++) | |
1101 | { | |
1102 | if (group->meth != points[i]->meth) | |
1103 | { | |
1104 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1105 | return 0; | |
1106 | } | |
1107 | } | |
1108 | return group->meth->points_make_affine(group, num, points, ctx); | |
1109 | } | |
37c660ff BM |
1110 | |
1111 | ||
1112 | /* Functions for point multiplication. | |
1113 | * | |
1114 | * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c; | |
1115 | * otherwise we dispatch through methods. | |
1116 | */ | |
1117 | ||
1118 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
1119 | size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx) | |
1120 | { | |
1121 | if (group->meth->mul == 0) | |
1122 | /* use default */ | |
1123 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
1124 | ||
1125 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); | |
1126 | } | |
1127 | ||
1128 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
1129 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) | |
1130 | { | |
1131 | /* just a convenient interface to EC_POINTs_mul() */ | |
1132 | ||
1133 | const EC_POINT *points[1]; | |
1134 | const BIGNUM *scalars[1]; | |
1135 | ||
1136 | points[0] = point; | |
1137 | scalars[0] = p_scalar; | |
1138 | ||
1139 | return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx); | |
1140 | } | |
1141 | ||
1142 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
1143 | { | |
1144 | if (group->meth->mul == 0) | |
1145 | /* use default */ | |
1146 | return ec_wNAF_precompute_mult(group, ctx); | |
1147 | ||
1148 | if (group->meth->precompute_mult != 0) | |
1149 | return group->meth->precompute_mult(group, ctx); | |
1150 | else | |
1151 | return 1; /* nothing to do, so report success */ | |
1152 | } | |
1153 | ||
1154 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
1155 | { | |
1156 | if (group->meth->mul == 0) | |
1157 | /* use default */ | |
1158 | return ec_wNAF_have_precompute_mult(group); | |
1159 | ||
1160 | if (group->meth->have_precompute_mult != 0) | |
1161 | return group->meth->have_precompute_mult(group); | |
1162 | else | |
1163 | return 0; /* cannot tell whether precomputation has been performed */ | |
1164 | } |