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1 | /* crypto/ec/ec_lib.c */ | |
2 | /* ==================================================================== | |
3 | * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. | |
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 | ||
56 | #include <string.h> | |
57 | ||
58 | #include <openssl/err.h> | |
59 | #include <openssl/opensslv.h> | |
60 | ||
61 | #include "ec_lcl.h" | |
62 | ||
63 | static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; | |
64 | ||
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; | |
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; | |
96 | ||
97 | ret->nid = 0; | |
98 | ||
99 | if (!meth->group_init(ret)) | |
100 | { | |
101 | OPENSSL_free(ret); | |
102 | return NULL; | |
103 | } | |
104 | ||
105 | return ret; | |
106 | } | |
107 | ||
108 | ||
109 | void EC_GROUP_free(EC_GROUP *group) | |
110 | { | |
111 | if (group->meth->group_finish != 0) | |
112 | group->meth->group_finish(group); | |
113 | ||
114 | EC_GROUP_free_extra_data(group); | |
115 | ||
116 | OPENSSL_free(group); | |
117 | } | |
118 | ||
119 | ||
120 | void EC_GROUP_clear_free(EC_GROUP *group) | |
121 | { | |
122 | if (group->meth->group_clear_finish != 0) | |
123 | group->meth->group_clear_finish(group); | |
124 | else if (group->meth != NULL && group->meth->group_finish != 0) | |
125 | group->meth->group_finish(group); | |
126 | ||
127 | EC_GROUP_clear_free_extra_data(group); | |
128 | ||
129 | memset(group, 0, sizeof *group); | |
130 | OPENSSL_free(group); | |
131 | } | |
132 | ||
133 | ||
134 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
135 | { | |
136 | if (dest->meth->group_copy == 0) | |
137 | { | |
138 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
139 | return 0; | |
140 | } | |
141 | if (dest->meth != src->meth) | |
142 | { | |
143 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
144 | return 0; | |
145 | } | |
146 | if (dest == src) | |
147 | return 1; | |
148 | ||
149 | EC_GROUP_clear_free_extra_data(dest); | |
150 | if (src->extra_data_dup_func) | |
151 | { | |
152 | if (src->extra_data != NULL) | |
153 | { | |
154 | dest->extra_data = src->extra_data_dup_func(src->extra_data); | |
155 | if (dest->extra_data == NULL) | |
156 | return 0; | |
157 | } | |
158 | ||
159 | dest->extra_data_dup_func = src->extra_data_dup_func; | |
160 | dest->extra_data_free_func = src->extra_data_free_func; | |
161 | dest->extra_data_clear_free_func = src->extra_data_clear_free_func; | |
162 | } | |
163 | ||
164 | return dest->meth->group_copy(dest, src); | |
165 | } | |
166 | ||
167 | ||
168 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) | |
169 | { | |
170 | return group->meth; | |
171 | } | |
172 | ||
173 | ||
174 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) | |
175 | { | |
176 | if (group->meth->group_set_curve_GFp == 0) | |
177 | { | |
178 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
179 | return 0; | |
180 | } | |
181 | return group->meth->group_set_curve_GFp(group, p, a, b, ctx); | |
182 | } | |
183 | ||
184 | ||
185 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) | |
186 | { | |
187 | if (group->meth->group_get_curve_GFp == 0) | |
188 | { | |
189 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
190 | return 0; | |
191 | } | |
192 | return group->meth->group_get_curve_GFp(group, p, a, b, ctx); | |
193 | } | |
194 | ||
195 | ||
196 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor) | |
197 | { | |
198 | if (group->meth->group_set_generator == 0) | |
199 | { | |
200 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
201 | return 0; | |
202 | } | |
203 | return group->meth->group_set_generator(group, generator, order, cofactor); | |
204 | } | |
205 | ||
206 | ||
207 | EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) | |
208 | { | |
209 | if (group->meth->group_get0_generator == 0) | |
210 | { | |
211 | ECerr(EC_F_EC_GROUP_GET0_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
212 | return 0; | |
213 | } | |
214 | return group->meth->group_get0_generator(group); | |
215 | } | |
216 | ||
217 | ||
218 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) | |
219 | { | |
220 | if (group->meth->group_get_order == 0) | |
221 | { | |
222 | ECerr(EC_F_EC_GROUP_GET_ORDER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
223 | return 0; | |
224 | } | |
225 | return group->meth->group_get_order(group, order, ctx); | |
226 | } | |
227 | ||
228 | ||
229 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx) | |
230 | { | |
231 | if (group->meth->group_get_cofactor == 0) | |
232 | { | |
233 | ECerr(EC_F_EC_GROUP_GET_COFACTOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
234 | return 0; | |
235 | } | |
236 | return group->meth->group_get_cofactor(group, cofactor, ctx); | |
237 | } | |
238 | ||
239 | ||
240 | /* this has 'package' visibility */ | |
241 | int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *), | |
242 | void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *)) | |
243 | { | |
244 | if ((group->extra_data != NULL) | |
245 | || (group->extra_data_dup_func != 0) | |
246 | || (group->extra_data_free_func != 0) | |
247 | || (group->extra_data_clear_free_func != 0)) | |
248 | { | |
249 | ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | group->extra_data = extra_data; | |
254 | group->extra_data_dup_func = extra_data_dup_func; | |
255 | group->extra_data_free_func = extra_data_free_func; | |
256 | group->extra_data_clear_free_func = extra_data_clear_free_func; | |
257 | return 1; | |
258 | } | |
259 | ||
260 | ||
261 | /* this has 'package' visibility */ | |
262 | void *EC_GROUP_get_extra_data(const EC_GROUP *group, void *(*extra_data_dup_func)(void *), | |
263 | void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *)) | |
264 | { | |
265 | if ((group->extra_data_dup_func != extra_data_dup_func) | |
266 | || (group->extra_data_free_func != extra_data_free_func) | |
267 | || (group->extra_data_clear_free_func != extra_data_clear_free_func)) | |
268 | { | |
269 | ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA); | |
270 | return NULL; | |
271 | } | |
272 | ||
273 | return group->extra_data; | |
274 | } | |
275 | ||
276 | ||
277 | /* this has 'package' visibility */ | |
278 | void EC_GROUP_free_extra_data(EC_GROUP *group) | |
279 | { | |
280 | if (group->extra_data_free_func) | |
281 | group->extra_data_free_func(group->extra_data); | |
282 | group->extra_data = NULL; | |
283 | group->extra_data_dup_func = 0; | |
284 | group->extra_data_free_func = 0; | |
285 | group->extra_data_clear_free_func = 0; | |
286 | } | |
287 | ||
288 | ||
289 | /* this has 'package' visibility */ | |
290 | void EC_GROUP_clear_free_extra_data(EC_GROUP *group) | |
291 | { | |
292 | if (group->extra_data_clear_free_func) | |
293 | group->extra_data_clear_free_func(group->extra_data); | |
294 | else if (group->extra_data_free_func) | |
295 | group->extra_data_free_func(group->extra_data); | |
296 | group->extra_data = NULL; | |
297 | group->extra_data_dup_func = 0; | |
298 | group->extra_data_free_func = 0; | |
299 | group->extra_data_clear_free_func = 0; | |
300 | } | |
301 | ||
302 | void EC_GROUP_set_nid(EC_GROUP *group, int nid) | |
303 | { | |
304 | group->nid = nid; | |
305 | } | |
306 | ||
307 | int EC_GROUP_get_nid(const EC_GROUP *group) | |
308 | { | |
309 | return group->nid; | |
310 | } | |
311 | ||
312 | ||
313 | ||
314 | /* functions for EC_POINT objects */ | |
315 | ||
316 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
317 | { | |
318 | EC_POINT *ret; | |
319 | ||
320 | if (group == NULL) | |
321 | { | |
322 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
323 | return NULL; | |
324 | } | |
325 | if (group->meth->point_init == 0) | |
326 | { | |
327 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | ret = OPENSSL_malloc(sizeof *ret); | |
332 | if (ret == NULL) | |
333 | { | |
334 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | ret->meth = group->meth; | |
339 | ||
340 | if (!ret->meth->point_init(ret)) | |
341 | { | |
342 | OPENSSL_free(ret); | |
343 | return NULL; | |
344 | } | |
345 | ||
346 | return ret; | |
347 | } | |
348 | ||
349 | ||
350 | void EC_POINT_free(EC_POINT *point) | |
351 | { | |
352 | if (point->meth->point_finish != 0) | |
353 | point->meth->point_finish(point); | |
354 | OPENSSL_free(point); | |
355 | } | |
356 | ||
357 | ||
358 | void EC_POINT_clear_free(EC_POINT *point) | |
359 | { | |
360 | if (point->meth->point_clear_finish != 0) | |
361 | point->meth->point_clear_finish(point); | |
362 | else if (point->meth != NULL && point->meth->point_finish != 0) | |
363 | point->meth->point_finish(point); | |
364 | memset(point, 0, sizeof *point); | |
365 | OPENSSL_free(point); | |
366 | } | |
367 | ||
368 | ||
369 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
370 | { | |
371 | if (dest->meth->point_copy == 0) | |
372 | { | |
373 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
374 | return 0; | |
375 | } | |
376 | if (dest->meth != src->meth) | |
377 | { | |
378 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
379 | return 0; | |
380 | } | |
381 | if (dest == src) | |
382 | return 1; | |
383 | return dest->meth->point_copy(dest, src); | |
384 | } | |
385 | ||
386 | ||
387 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) | |
388 | { | |
389 | return point->meth; | |
390 | } | |
391 | ||
392 | ||
393 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) | |
394 | { | |
395 | if (group->meth->point_set_to_infinity == 0) | |
396 | { | |
397 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
398 | return 0; | |
399 | } | |
400 | if (group->meth != point->meth) | |
401 | { | |
402 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
403 | return 0; | |
404 | } | |
405 | return group->meth->point_set_to_infinity(group, point); | |
406 | } | |
407 | ||
408 | ||
409 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, | |
410 | const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx) | |
411 | { | |
412 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) | |
413 | { | |
414 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
415 | return 0; | |
416 | } | |
417 | if (group->meth != point->meth) | |
418 | { | |
419 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
420 | return 0; | |
421 | } | |
422 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); | |
423 | } | |
424 | ||
425 | ||
426 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
427 | BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx) | |
428 | { | |
429 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) | |
430 | { | |
431 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
432 | return 0; | |
433 | } | |
434 | if (group->meth != point->meth) | |
435 | { | |
436 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
437 | return 0; | |
438 | } | |
439 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); | |
440 | } | |
441 | ||
442 | ||
443 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, | |
444 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) | |
445 | { | |
446 | if (group->meth->point_set_affine_coordinates_GFp == 0) | |
447 | { | |
448 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
449 | return 0; | |
450 | } | |
451 | if (group->meth != point->meth) | |
452 | { | |
453 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
454 | return 0; | |
455 | } | |
456 | return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx); | |
457 | } | |
458 | ||
459 | ||
460 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, | |
461 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) | |
462 | { | |
463 | if (group->meth->point_get_affine_coordinates_GFp == 0) | |
464 | { | |
465 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
466 | return 0; | |
467 | } | |
468 | if (group->meth != point->meth) | |
469 | { | |
470 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
471 | return 0; | |
472 | } | |
473 | return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx); | |
474 | } | |
475 | ||
476 | ||
477 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, | |
478 | const BIGNUM *x, int y_bit, BN_CTX *ctx) | |
479 | { | |
480 | if (group->meth->point_set_compressed_coordinates_GFp == 0) | |
481 | { | |
482 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
483 | return 0; | |
484 | } | |
485 | if (group->meth != point->meth) | |
486 | { | |
487 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); | |
488 | return 0; | |
489 | } | |
490 | return group->meth->point_set_compressed_coordinates_GFp(group, point, x, y_bit, ctx); | |
491 | } | |
492 | ||
493 | ||
494 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, | |
495 | unsigned char *buf, size_t len, BN_CTX *ctx) | |
496 | { | |
497 | if (group->meth->point2oct == 0) | |
498 | { | |
499 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
500 | return 0; | |
501 | } | |
502 | if (group->meth != point->meth) | |
503 | { | |
504 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); | |
505 | return 0; | |
506 | } | |
507 | return group->meth->point2oct(group, point, form, buf, len, ctx); | |
508 | } | |
509 | ||
510 | ||
511 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, | |
512 | const unsigned char *buf, size_t len, BN_CTX *ctx) | |
513 | { | |
514 | if (group->meth->oct2point == 0) | |
515 | { | |
516 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
517 | return 0; | |
518 | } | |
519 | if (group->meth != point->meth) | |
520 | { | |
521 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); | |
522 | return 0; | |
523 | } | |
524 | return group->meth->oct2point(group, point, buf, len, ctx); | |
525 | } | |
526 | ||
527 | ||
528 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
529 | { | |
530 | if (group->meth->add == 0) | |
531 | { | |
532 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
533 | return 0; | |
534 | } | |
535 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) | |
536 | { | |
537 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
538 | return 0; | |
539 | } | |
540 | return group->meth->add(group, r, a, b, ctx); | |
541 | } | |
542 | ||
543 | ||
544 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) | |
545 | { | |
546 | if (group->meth->dbl == 0) | |
547 | { | |
548 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
549 | return 0; | |
550 | } | |
551 | if ((group->meth != r->meth) || (r->meth != a->meth)) | |
552 | { | |
553 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
554 | return 0; | |
555 | } | |
556 | return group->meth->dbl(group, r, a, ctx); | |
557 | } | |
558 | ||
559 | ||
560 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) | |
561 | { | |
562 | if (group->meth->dbl == 0) | |
563 | { | |
564 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
565 | return 0; | |
566 | } | |
567 | if (group->meth != a->meth) | |
568 | { | |
569 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
570 | return 0; | |
571 | } | |
572 | return group->meth->invert(group, a, ctx); | |
573 | } | |
574 | ||
575 | ||
576 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) | |
577 | { | |
578 | if (group->meth->is_at_infinity == 0) | |
579 | { | |
580 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
581 | return 0; | |
582 | } | |
583 | if (group->meth != point->meth) | |
584 | { | |
585 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
586 | return 0; | |
587 | } | |
588 | return group->meth->is_at_infinity(group, point); | |
589 | } | |
590 | ||
591 | ||
592 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) | |
593 | { | |
594 | if (group->meth->is_on_curve == 0) | |
595 | { | |
596 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
597 | return 0; | |
598 | } | |
599 | if (group->meth != point->meth) | |
600 | { | |
601 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
602 | return 0; | |
603 | } | |
604 | return group->meth->is_on_curve(group, point, ctx); | |
605 | } | |
606 | ||
607 | ||
608 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) | |
609 | { | |
610 | if (group->meth->point_cmp == 0) | |
611 | { | |
612 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
613 | return 0; | |
614 | } | |
615 | if ((group->meth != a->meth) || (a->meth != b->meth)) | |
616 | { | |
617 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
618 | return 0; | |
619 | } | |
620 | return group->meth->point_cmp(group, a, b, ctx); | |
621 | } | |
622 | ||
623 | ||
624 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) | |
625 | { | |
626 | if (group->meth->make_affine == 0) | |
627 | { | |
628 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
629 | return 0; | |
630 | } | |
631 | if (group->meth != point->meth) | |
632 | { | |
633 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
634 | return 0; | |
635 | } | |
636 | return group->meth->make_affine(group, point, ctx); | |
637 | } | |
638 | ||
639 | ||
640 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) | |
641 | { | |
642 | size_t i; | |
643 | ||
644 | if (group->meth->points_make_affine == 0) | |
645 | { | |
646 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
647 | return 0; | |
648 | } | |
649 | for (i = 0; i < num; i++) | |
650 | { | |
651 | if (group->meth != points[i]->meth) | |
652 | { | |
653 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
654 | return 0; | |
655 | } | |
656 | } | |
657 | return group->meth->points_make_affine(group, num, points, ctx); | |
658 | } |