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65e81670 | 1 | /* crypto/ec/ec_lib.c */ |
35b73a1f BM |
2 | /* |
3 | * Originally written by Bodo Moeller for the OpenSSL project. | |
4 | */ | |
65e81670 | 5 | /* ==================================================================== |
37c660ff | 6 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
65e81670 BM |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
65e81670 BM |
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. | |
0f113f3e | 60 | * Binary polynomial ECC support in OpenSSL originally developed by |
7793f30e BM |
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 | |
b597aab8 | 71 | const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; |
bb62a8b0 | 72 | |
0657bf9c BM |
73 | /* functions for EC_GROUP objects */ |
74 | ||
75 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
0f113f3e MC |
76 | { |
77 | EC_GROUP *ret; | |
78 | ||
79 | if (meth == NULL) { | |
80 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); | |
81 | return NULL; | |
82 | } | |
83 | if (meth->group_init == 0) { | |
84 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | ret = OPENSSL_malloc(sizeof *ret); | |
89 | if (ret == NULL) { | |
90 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
91 | return NULL; | |
92 | } | |
93 | ||
94 | ret->meth = meth; | |
95 | ||
96 | ret->extra_data = NULL; | |
97 | ret->mont_data = NULL; | |
98 | ||
99 | ret->generator = NULL; | |
100 | ret->order = BN_new(); | |
101 | ret->cofactor = NULL; | |
102 | if (!ret->order) | |
103 | goto err; | |
104 | ret->cofactor = BN_new(); | |
105 | if (!ret->cofactor) | |
106 | goto err; | |
107 | ||
108 | ret->curve_name = 0; | |
86f300d3 | 109 | ret->asn1_flag = OPENSSL_EC_NAMED_CURVE; |
0f113f3e MC |
110 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
111 | ||
112 | ret->seed = NULL; | |
113 | ret->seed_len = 0; | |
114 | ||
115 | if (!meth->group_init(ret)) | |
116 | goto err; | |
117 | ||
118 | return ret; | |
119 | err: | |
23a1d5e9 RS |
120 | BN_free(ret->order); |
121 | BN_free(ret->cofactor); | |
0f113f3e MC |
122 | OPENSSL_free(ret); |
123 | return NULL; | |
124 | } | |
0657bf9c | 125 | |
0657bf9c | 126 | void EC_GROUP_free(EC_GROUP *group) |
0f113f3e MC |
127 | { |
128 | if (!group) | |
129 | return; | |
7711de24 | 130 | |
0f113f3e MC |
131 | if (group->meth->group_finish != 0) |
132 | group->meth->group_finish(group); | |
df9cc153 | 133 | |
0f113f3e | 134 | EC_EX_DATA_free_all_data(&group->extra_data); |
df9cc153 | 135 | |
23a1d5e9 | 136 | BN_MONT_CTX_free(group->mont_data); |
f54be179 | 137 | |
8fdc3734 | 138 | EC_POINT_free(group->generator); |
0f113f3e MC |
139 | BN_free(group->order); |
140 | BN_free(group->cofactor); | |
b6db386f | 141 | |
0f113f3e MC |
142 | if (group->seed) |
143 | OPENSSL_free(group->seed); | |
458c2917 | 144 | |
0f113f3e MC |
145 | OPENSSL_free(group); |
146 | } | |
0657bf9c BM |
147 | |
148 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
149 | { |
150 | if (!group) | |
151 | return; | |
df9cc153 | 152 | |
0f113f3e MC |
153 | if (group->meth->group_clear_finish != 0) |
154 | group->meth->group_clear_finish(group); | |
155 | else if (group->meth->group_finish != 0) | |
156 | group->meth->group_finish(group); | |
df9cc153 | 157 | |
0f113f3e | 158 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
f54be179 | 159 | |
23a1d5e9 | 160 | BN_MONT_CTX_free(group->mont_data); |
b6db386f | 161 | |
8fdc3734 | 162 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
163 | BN_clear_free(group->order); |
164 | BN_clear_free(group->cofactor); | |
4b45c6e5 RS |
165 | OPENSSL_clear_free(group->seed, group->seed_len); |
166 | OPENSSL_clear_free(group, sizeof *group); | |
0f113f3e | 167 | } |
0657bf9c BM |
168 | |
169 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e MC |
170 | { |
171 | EC_EXTRA_DATA *d; | |
172 | ||
173 | if (dest->meth->group_copy == 0) { | |
174 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
175 | return 0; | |
176 | } | |
177 | if (dest->meth != src->meth) { | |
178 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
179 | return 0; | |
180 | } | |
181 | if (dest == src) | |
182 | return 1; | |
183 | ||
184 | EC_EX_DATA_free_all_data(&dest->extra_data); | |
185 | ||
186 | for (d = src->extra_data; d != NULL; d = d->next) { | |
187 | void *t = d->dup_func(d->data); | |
188 | ||
189 | if (t == NULL) | |
190 | return 0; | |
191 | if (!EC_EX_DATA_set_data | |
192 | (&dest->extra_data, t, d->dup_func, d->free_func, | |
193 | d->clear_free_func)) | |
194 | return 0; | |
195 | } | |
196 | ||
197 | if (src->mont_data != NULL) { | |
198 | if (dest->mont_data == NULL) { | |
199 | dest->mont_data = BN_MONT_CTX_new(); | |
200 | if (dest->mont_data == NULL) | |
201 | return 0; | |
202 | } | |
203 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
204 | return 0; | |
205 | } else { | |
206 | /* src->generator == NULL */ | |
23a1d5e9 RS |
207 | BN_MONT_CTX_free(dest->mont_data); |
208 | dest->mont_data = NULL; | |
0f113f3e | 209 | } |
0657bf9c | 210 | |
0f113f3e MC |
211 | if (src->generator != NULL) { |
212 | if (dest->generator == NULL) { | |
213 | dest->generator = EC_POINT_new(dest); | |
214 | if (dest->generator == NULL) | |
215 | return 0; | |
216 | } | |
217 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
218 | return 0; | |
219 | } else { | |
220 | /* src->generator == NULL */ | |
8fdc3734 RS |
221 | EC_POINT_clear_free(dest->generator); |
222 | dest->generator = NULL; | |
0f113f3e MC |
223 | } |
224 | ||
225 | if (!BN_copy(dest->order, src->order)) | |
226 | return 0; | |
227 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
228 | return 0; | |
229 | ||
230 | dest->curve_name = src->curve_name; | |
231 | dest->asn1_flag = src->asn1_flag; | |
232 | dest->asn1_form = src->asn1_form; | |
233 | ||
234 | if (src->seed) { | |
235 | if (dest->seed) | |
236 | OPENSSL_free(dest->seed); | |
237 | dest->seed = OPENSSL_malloc(src->seed_len); | |
238 | if (dest->seed == NULL) | |
239 | return 0; | |
240 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
241 | return 0; | |
242 | dest->seed_len = src->seed_len; | |
243 | } else { | |
244 | if (dest->seed) | |
245 | OPENSSL_free(dest->seed); | |
246 | dest->seed = NULL; | |
247 | dest->seed_len = 0; | |
248 | } | |
249 | ||
250 | return dest->meth->group_copy(dest, src); | |
251 | } | |
0657bf9c | 252 | |
7793f30e | 253 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
254 | { |
255 | EC_GROUP *t = NULL; | |
256 | int ok = 0; | |
7793f30e | 257 | |
0f113f3e MC |
258 | if (a == NULL) |
259 | return NULL; | |
7793f30e | 260 | |
0f113f3e MC |
261 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
262 | return (NULL); | |
263 | if (!EC_GROUP_copy(t, a)) | |
264 | goto err; | |
7793f30e | 265 | |
0f113f3e | 266 | ok = 1; |
7793f30e | 267 | |
0f113f3e MC |
268 | err: |
269 | if (!ok) { | |
8fdc3734 | 270 | EC_GROUP_free(t); |
0f113f3e | 271 | return NULL; |
8fdc3734 | 272 | } |
0f113f3e MC |
273 | return t; |
274 | } | |
7793f30e | 275 | |
48fe4d62 | 276 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
277 | { |
278 | return group->meth; | |
279 | } | |
48fe4d62 | 280 | |
458c2917 | 281 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
282 | { |
283 | return meth->field_type; | |
284 | } | |
285 | ||
286 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
287 | const BIGNUM *order, const BIGNUM *cofactor) | |
288 | { | |
289 | if (generator == NULL) { | |
290 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | if (group->generator == NULL) { | |
295 | group->generator = EC_POINT_new(group); | |
296 | if (group->generator == NULL) | |
297 | return 0; | |
298 | } | |
299 | if (!EC_POINT_copy(group->generator, generator)) | |
300 | return 0; | |
301 | ||
302 | if (order != NULL) { | |
303 | if (!BN_copy(group->order, order)) | |
304 | return 0; | |
305 | } else | |
306 | BN_zero(group->order); | |
307 | ||
308 | if (cofactor != NULL) { | |
309 | if (!BN_copy(group->cofactor, cofactor)) | |
310 | return 0; | |
311 | } else | |
312 | BN_zero(group->cofactor); | |
313 | ||
314 | /* | |
315 | * We ignore the return value because some groups have an order with | |
316 | * factors of two, which makes the Montgomery setup fail. | |
317 | * |group->mont_data| will be NULL in this case. | |
318 | */ | |
319 | ec_precompute_mont_data(group); | |
320 | ||
321 | return 1; | |
322 | } | |
bb62a8b0 | 323 | |
9dd84053 | 324 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
325 | { |
326 | return group->generator; | |
327 | } | |
bb62a8b0 | 328 | |
f54be179 | 329 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
330 | { |
331 | return group->mont_data; | |
332 | } | |
bb62a8b0 | 333 | |
b6db386f | 334 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
335 | { |
336 | if (!BN_copy(order, group->order)) | |
337 | return 0; | |
0657bf9c | 338 | |
0f113f3e MC |
339 | return !BN_is_zero(order); |
340 | } | |
0657bf9c | 341 | |
0f113f3e MC |
342 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
343 | BN_CTX *ctx) | |
344 | { | |
345 | if (!BN_copy(cofactor, group->cofactor)) | |
346 | return 0; | |
48fe4d62 | 347 | |
0f113f3e MC |
348 | return !BN_is_zero(group->cofactor); |
349 | } | |
48fe4d62 | 350 | |
7dc17a6c | 351 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
352 | { |
353 | group->curve_name = nid; | |
354 | } | |
b6db386f | 355 | |
7dc17a6c | 356 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
357 | { |
358 | return group->curve_name; | |
359 | } | |
b6db386f | 360 | |
458c2917 | 361 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
362 | { |
363 | group->asn1_flag = flag; | |
364 | } | |
458c2917 BM |
365 | |
366 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
367 | { |
368 | return group->asn1_flag; | |
369 | } | |
458c2917 | 370 | |
0f113f3e | 371 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 372 | point_conversion_form_t form) |
0f113f3e MC |
373 | { |
374 | group->asn1_form = form; | |
375 | } | |
254ef80d | 376 | |
0f113f3e MC |
377 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
378 | *group) | |
379 | { | |
380 | return group->asn1_form; | |
381 | } | |
254ef80d | 382 | |
5f3d6f70 | 383 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e MC |
384 | { |
385 | if (group->seed) { | |
386 | OPENSSL_free(group->seed); | |
387 | group->seed = NULL; | |
388 | group->seed_len = 0; | |
389 | } | |
5f3d6f70 | 390 | |
0f113f3e MC |
391 | if (!len || !p) |
392 | return 1; | |
5f3d6f70 | 393 | |
0f113f3e MC |
394 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
395 | return 0; | |
396 | memcpy(group->seed, p, len); | |
397 | group->seed_len = len; | |
5f3d6f70 | 398 | |
0f113f3e MC |
399 | return len; |
400 | } | |
5f3d6f70 BM |
401 | |
402 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
403 | { |
404 | return group->seed; | |
405 | } | |
5f3d6f70 BM |
406 | |
407 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
408 | { |
409 | return group->seed_len; | |
410 | } | |
411 | ||
412 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
413 | const BIGNUM *b, BN_CTX *ctx) | |
414 | { | |
415 | if (group->meth->group_set_curve == 0) { | |
416 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
417 | return 0; | |
418 | } | |
419 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
420 | } | |
421 | ||
422 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
423 | BIGNUM *b, BN_CTX *ctx) | |
424 | { | |
425 | if (group->meth->group_get_curve == 0) { | |
426 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
427 | return 0; | |
428 | } | |
429 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
430 | } | |
7793f30e | 431 | |
b3310161 | 432 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
433 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
434 | const BIGNUM *b, BN_CTX *ctx) | |
435 | { | |
436 | if (group->meth->group_set_curve == 0) { | |
437 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
438 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
439 | return 0; | |
440 | } | |
441 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
442 | } | |
443 | ||
444 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
445 | BIGNUM *b, BN_CTX *ctx) | |
446 | { | |
447 | if (group->meth->group_get_curve == 0) { | |
448 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
449 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
450 | return 0; | |
451 | } | |
452 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
453 | } | |
b3310161 | 454 | #endif |
7793f30e BM |
455 | |
456 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
457 | { |
458 | if (group->meth->group_get_degree == 0) { | |
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); | |
463 | } | |
48fe4d62 | 464 | |
17d6bb81 | 465 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
466 | { |
467 | if (group->meth->group_check_discriminant == 0) { | |
468 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
469 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
470 | return 0; | |
471 | } | |
472 | return group->meth->group_check_discriminant(group, ctx); | |
473 | } | |
af28dd6c | 474 | |
ada0e717 | 475 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
476 | { |
477 | int r = 0; | |
478 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
479 | BN_CTX *ctx_new = NULL; | |
480 | ||
481 | /* compare the field types */ | |
482 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
483 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
484 | return 1; | |
485 | /* compare the curve name (if present in both) */ | |
486 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
487 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
488 | return 1; | |
489 | ||
490 | if (!ctx) | |
491 | ctx_new = ctx = BN_CTX_new(); | |
492 | if (!ctx) | |
493 | return -1; | |
494 | ||
495 | BN_CTX_start(ctx); | |
496 | a1 = BN_CTX_get(ctx); | |
497 | a2 = BN_CTX_get(ctx); | |
498 | a3 = BN_CTX_get(ctx); | |
499 | b1 = BN_CTX_get(ctx); | |
500 | b2 = BN_CTX_get(ctx); | |
501 | b3 = BN_CTX_get(ctx); | |
502 | if (!b3) { | |
503 | BN_CTX_end(ctx); | |
23a1d5e9 | 504 | BN_CTX_free(ctx_new); |
0f113f3e MC |
505 | return -1; |
506 | } | |
507 | ||
508 | /* | |
509 | * XXX This approach assumes that the external representation of curves | |
510 | * over the same field type is the same. | |
511 | */ | |
512 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
513 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
514 | r = 1; | |
515 | ||
516 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
517 | r = 1; | |
518 | ||
519 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
520 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
521 | EC_GROUP_get0_generator(b), ctx)) | |
522 | r = 1; | |
523 | ||
524 | if (!r) { | |
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 | BN_CTX_end(ctx); | |
23a1d5e9 | 531 | BN_CTX_free(ctx_new); |
0f113f3e MC |
532 | return -1; |
533 | } | |
534 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
535 | r = 1; | |
536 | } | |
537 | ||
538 | BN_CTX_end(ctx); | |
23a1d5e9 | 539 | BN_CTX_free(ctx_new); |
ada0e717 | 540 | |
0f113f3e MC |
541 | return r; |
542 | } | |
ada0e717 | 543 | |
df9cc153 | 544 | /* this has 'package' visibility */ |
9dd84053 | 545 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
0f113f3e MC |
546 | void *(*dup_func) (void *), |
547 | void (*free_func) (void *), | |
548 | void (*clear_free_func) (void *)) | |
549 | { | |
550 | EC_EXTRA_DATA *d; | |
551 | ||
552 | if (ex_data == NULL) | |
553 | return 0; | |
554 | ||
555 | for (d = *ex_data; d != NULL; d = d->next) { | |
556 | if (d->dup_func == dup_func && d->free_func == free_func | |
557 | && d->clear_free_func == clear_free_func) { | |
558 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); | |
559 | return 0; | |
560 | } | |
561 | } | |
df9cc153 | 562 | |
0f113f3e MC |
563 | if (data == NULL) |
564 | /* no explicit entry needed */ | |
565 | return 1; | |
ba729265 | 566 | |
0f113f3e MC |
567 | d = OPENSSL_malloc(sizeof *d); |
568 | if (d == NULL) | |
569 | return 0; | |
ba729265 | 570 | |
0f113f3e MC |
571 | d->data = data; |
572 | d->dup_func = dup_func; | |
573 | d->free_func = free_func; | |
574 | d->clear_free_func = clear_free_func; | |
ba729265 | 575 | |
0f113f3e MC |
576 | d->next = *ex_data; |
577 | *ex_data = d; | |
ba729265 | 578 | |
0f113f3e MC |
579 | return 1; |
580 | } | |
df9cc153 | 581 | |
df9cc153 | 582 | /* this has 'package' visibility */ |
9dd84053 | 583 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
0f113f3e MC |
584 | void *(*dup_func) (void *), |
585 | void (*free_func) (void *), | |
586 | void (*clear_free_func) (void *)) | |
587 | { | |
588 | const EC_EXTRA_DATA *d; | |
589 | ||
590 | for (d = ex_data; d != NULL; d = d->next) { | |
591 | if (d->dup_func == dup_func && d->free_func == free_func | |
592 | && d->clear_free_func == clear_free_func) | |
593 | return d->data; | |
594 | } | |
595 | ||
596 | return NULL; | |
597 | } | |
df9cc153 | 598 | |
ba729265 | 599 | /* this has 'package' visibility */ |
9dd84053 | 600 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
601 | void *(*dup_func) (void *), |
602 | void (*free_func) (void *), | |
603 | void (*clear_free_func) (void *)) | |
604 | { | |
605 | EC_EXTRA_DATA **p; | |
606 | ||
607 | if (ex_data == NULL) | |
608 | return; | |
609 | ||
610 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
611 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
612 | && (*p)->clear_free_func == clear_free_func) { | |
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 | } | |
622 | } | |
df9cc153 | 623 | |
ba729265 | 624 | /* this has 'package' visibility */ |
bbbd6710 | 625 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
626 | void *(*dup_func) (void *), |
627 | void (*free_func) (void *), | |
628 | void (*clear_free_func) (void *)) | |
629 | { | |
630 | EC_EXTRA_DATA **p; | |
631 | ||
632 | if (ex_data == NULL) | |
633 | return; | |
634 | ||
635 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
636 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
637 | && (*p)->clear_free_func == clear_free_func) { | |
638 | EC_EXTRA_DATA *next = (*p)->next; | |
639 | ||
640 | (*p)->clear_free_func((*p)->data); | |
641 | OPENSSL_free(*p); | |
642 | ||
643 | *p = next; | |
644 | return; | |
645 | } | |
646 | } | |
647 | } | |
df9cc153 BM |
648 | |
649 | /* this has 'package' visibility */ | |
9dd84053 | 650 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
651 | { |
652 | EC_EXTRA_DATA *d; | |
653 | ||
654 | if (ex_data == NULL) | |
655 | return; | |
656 | ||
657 | d = *ex_data; | |
658 | while (d) { | |
659 | EC_EXTRA_DATA *next = d->next; | |
660 | ||
661 | d->free_func(d->data); | |
662 | OPENSSL_free(d); | |
663 | ||
664 | d = next; | |
665 | } | |
666 | *ex_data = NULL; | |
667 | } | |
df9cc153 | 668 | |
df9cc153 | 669 | /* this has 'package' visibility */ |
9dd84053 | 670 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
671 | { |
672 | EC_EXTRA_DATA *d; | |
673 | ||
674 | if (ex_data == NULL) | |
675 | return; | |
676 | ||
677 | d = *ex_data; | |
678 | while (d) { | |
679 | EC_EXTRA_DATA *next = d->next; | |
680 | ||
681 | d->clear_free_func(d->data); | |
682 | OPENSSL_free(d); | |
df9cc153 | 683 | |
0f113f3e MC |
684 | d = next; |
685 | } | |
686 | *ex_data = NULL; | |
687 | } | |
0657bf9c BM |
688 | |
689 | /* functions for EC_POINT objects */ | |
690 | ||
691 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
692 | { |
693 | EC_POINT *ret; | |
694 | ||
695 | if (group == NULL) { | |
696 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
697 | return NULL; | |
698 | } | |
699 | if (group->meth->point_init == 0) { | |
700 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
701 | return NULL; | |
702 | } | |
703 | ||
704 | ret = OPENSSL_malloc(sizeof *ret); | |
705 | if (ret == NULL) { | |
706 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
707 | return NULL; | |
708 | } | |
709 | ||
710 | ret->meth = group->meth; | |
711 | ||
712 | if (!ret->meth->point_init(ret)) { | |
713 | OPENSSL_free(ret); | |
714 | return NULL; | |
715 | } | |
716 | ||
717 | return ret; | |
718 | } | |
0657bf9c BM |
719 | |
720 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
721 | { |
722 | if (!point) | |
723 | return; | |
7711de24 | 724 | |
0f113f3e MC |
725 | if (point->meth->point_finish != 0) |
726 | point->meth->point_finish(point); | |
727 | OPENSSL_free(point); | |
728 | } | |
0657bf9c BM |
729 | |
730 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
731 | { |
732 | if (!point) | |
733 | return; | |
734 | ||
735 | if (point->meth->point_clear_finish != 0) | |
736 | point->meth->point_clear_finish(point); | |
737 | else if (point->meth->point_finish != 0) | |
738 | point->meth->point_finish(point); | |
4b45c6e5 | 739 | OPENSSL_clear_free(point, sizeof *point); |
0f113f3e | 740 | } |
0657bf9c BM |
741 | |
742 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
743 | { |
744 | if (dest->meth->point_copy == 0) { | |
745 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
746 | return 0; | |
747 | } | |
748 | if (dest->meth != src->meth) { | |
749 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
750 | return 0; | |
751 | } | |
752 | if (dest == src) | |
753 | return 1; | |
754 | return dest->meth->point_copy(dest, src); | |
755 | } | |
0657bf9c | 756 | |
7793f30e | 757 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
758 | { |
759 | EC_POINT *t; | |
760 | int r; | |
761 | ||
762 | if (a == NULL) | |
763 | return NULL; | |
764 | ||
765 | t = EC_POINT_new(group); | |
766 | if (t == NULL) | |
767 | return (NULL); | |
768 | r = EC_POINT_copy(t, a); | |
769 | if (!r) { | |
770 | EC_POINT_free(t); | |
771 | return NULL; | |
8fdc3734 RS |
772 | } |
773 | return t; | |
0f113f3e | 774 | } |
7793f30e | 775 | |
48fe4d62 | 776 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
777 | { |
778 | return point->meth; | |
779 | } | |
48fe4d62 | 780 | |
226cc7de | 781 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
782 | { |
783 | if (group->meth->point_set_to_infinity == 0) { | |
784 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
785 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
786 | return 0; | |
787 | } | |
788 | if (group->meth != point->meth) { | |
789 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
790 | return 0; | |
791 | } | |
792 | return group->meth->point_set_to_infinity(group, point); | |
793 | } | |
794 | ||
795 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
796 | EC_POINT *point, const BIGNUM *x, | |
797 | const BIGNUM *y, const BIGNUM *z, | |
798 | BN_CTX *ctx) | |
799 | { | |
800 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
801 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
802 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
803 | return 0; | |
804 | } | |
805 | if (group->meth != point->meth) { | |
806 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
807 | EC_R_INCOMPATIBLE_OBJECTS); | |
808 | return 0; | |
809 | } | |
810 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
811 | y, z, ctx); | |
812 | } | |
813 | ||
814 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
815 | const EC_POINT *point, BIGNUM *x, | |
816 | BIGNUM *y, BIGNUM *z, | |
817 | BN_CTX *ctx) | |
818 | { | |
819 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
820 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
821 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
822 | return 0; | |
823 | } | |
824 | if (group->meth != point->meth) { | |
825 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
826 | EC_R_INCOMPATIBLE_OBJECTS); | |
827 | return 0; | |
828 | } | |
829 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
830 | y, z, ctx); | |
831 | } | |
832 | ||
833 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
834 | EC_POINT *point, const BIGNUM *x, | |
835 | const BIGNUM *y, BN_CTX *ctx) | |
836 | { | |
837 | if (group->meth->point_set_affine_coordinates == 0) { | |
838 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
839 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
840 | return 0; | |
841 | } | |
842 | if (group->meth != point->meth) { | |
843 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
844 | EC_R_INCOMPATIBLE_OBJECTS); | |
845 | return 0; | |
846 | } | |
847 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
848 | } | |
226cc7de | 849 | |
b3310161 | 850 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
851 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
852 | EC_POINT *point, const BIGNUM *x, | |
853 | const BIGNUM *y, BN_CTX *ctx) | |
854 | { | |
855 | if (group->meth->point_set_affine_coordinates == 0) { | |
856 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
857 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
858 | return 0; | |
859 | } | |
860 | if (group->meth != point->meth) { | |
861 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
862 | EC_R_INCOMPATIBLE_OBJECTS); | |
863 | return 0; | |
864 | } | |
865 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
866 | } | |
b3310161 | 867 | #endif |
7793f30e | 868 | |
0f113f3e MC |
869 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
870 | const EC_POINT *point, BIGNUM *x, | |
871 | BIGNUM *y, BN_CTX *ctx) | |
872 | { | |
873 | if (group->meth->point_get_affine_coordinates == 0) { | |
874 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
875 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
876 | return 0; | |
877 | } | |
878 | if (group->meth != point->meth) { | |
879 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
880 | EC_R_INCOMPATIBLE_OBJECTS); | |
881 | return 0; | |
882 | } | |
883 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
884 | } | |
7793f30e | 885 | |
b3310161 | 886 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
887 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
888 | const EC_POINT *point, BIGNUM *x, | |
889 | BIGNUM *y, BN_CTX *ctx) | |
890 | { | |
891 | if (group->meth->point_get_affine_coordinates == 0) { | |
892 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
893 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
894 | return 0; | |
895 | } | |
896 | if (group->meth != point->meth) { | |
897 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
898 | EC_R_INCOMPATIBLE_OBJECTS); | |
899 | return 0; | |
900 | } | |
901 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
902 | } | |
b3310161 | 903 | #endif |
7793f30e | 904 | |
0f113f3e MC |
905 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
906 | const EC_POINT *b, BN_CTX *ctx) | |
907 | { | |
908 | if (group->meth->add == 0) { | |
909 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
910 | return 0; | |
911 | } | |
912 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
913 | || (a->meth != b->meth)) { | |
914 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
915 | return 0; | |
916 | } | |
917 | return group->meth->add(group, r, a, b, ctx); | |
918 | } | |
919 | ||
920 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
921 | BN_CTX *ctx) | |
922 | { | |
923 | if (group->meth->dbl == 0) { | |
924 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
925 | return 0; | |
926 | } | |
927 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
928 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
929 | return 0; | |
930 | } | |
931 | return group->meth->dbl(group, r, a, ctx); | |
932 | } | |
0657bf9c | 933 | |
1d5bd6cf | 934 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
935 | { |
936 | if (group->meth->invert == 0) { | |
937 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
938 | return 0; | |
939 | } | |
940 | if (group->meth != a->meth) { | |
941 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
942 | return 0; | |
943 | } | |
944 | return group->meth->invert(group, a, ctx); | |
945 | } | |
1d5bd6cf | 946 | |
0657bf9c | 947 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
948 | { |
949 | if (group->meth->is_at_infinity == 0) { | |
950 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
951 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
952 | return 0; | |
953 | } | |
954 | if (group->meth != point->meth) { | |
955 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
956 | return 0; | |
957 | } | |
958 | return group->meth->is_at_infinity(group, point); | |
959 | } | |
960 | ||
961 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, | |
962 | BN_CTX *ctx) | |
963 | { | |
964 | if (group->meth->is_on_curve == 0) { | |
965 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
966 | return 0; | |
967 | } | |
968 | if (group->meth != point->meth) { | |
969 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
970 | return 0; | |
971 | } | |
972 | return group->meth->is_on_curve(group, point, ctx); | |
973 | } | |
974 | ||
975 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
976 | BN_CTX *ctx) | |
977 | { | |
978 | if (group->meth->point_cmp == 0) { | |
979 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
980 | return -1; | |
981 | } | |
982 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
983 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
984 | return -1; | |
985 | } | |
986 | return group->meth->point_cmp(group, a, b, ctx); | |
987 | } | |
1d5bd6cf | 988 | |
e869d4bd | 989 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
990 | { |
991 | if (group->meth->make_affine == 0) { | |
992 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
993 | return 0; | |
994 | } | |
995 | if (group->meth != point->meth) { | |
996 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
997 | return 0; | |
998 | } | |
999 | return group->meth->make_affine(group, point, ctx); | |
1000 | } | |
1001 | ||
1002 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
1003 | EC_POINT *points[], BN_CTX *ctx) | |
1004 | { | |
1005 | size_t i; | |
1006 | ||
1007 | if (group->meth->points_make_affine == 0) { | |
1008 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1009 | return 0; | |
1010 | } | |
1011 | for (i = 0; i < num; i++) { | |
1012 | if (group->meth != points[i]->meth) { | |
1013 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1014 | return 0; | |
1015 | } | |
1016 | } | |
1017 | return group->meth->points_make_affine(group, num, points, ctx); | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
1022 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
1023 | * methods. | |
37c660ff BM |
1024 | */ |
1025 | ||
1026 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
1027 | size_t num, const EC_POINT *points[], |
1028 | const BIGNUM *scalars[], BN_CTX *ctx) | |
1029 | { | |
1030 | if (group->meth->mul == 0) | |
1031 | /* use default */ | |
1032 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 1033 | |
0f113f3e MC |
1034 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
1035 | } | |
37c660ff BM |
1036 | |
1037 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
1038 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
1039 | { | |
1040 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 1041 | |
0f113f3e MC |
1042 | const EC_POINT *points[1]; |
1043 | const BIGNUM *scalars[1]; | |
37c660ff | 1044 | |
0f113f3e MC |
1045 | points[0] = point; |
1046 | scalars[0] = p_scalar; | |
37c660ff | 1047 | |
0f113f3e MC |
1048 | return EC_POINTs_mul(group, r, g_scalar, |
1049 | (point != NULL | |
1050 | && p_scalar != NULL), points, scalars, ctx); | |
1051 | } | |
37c660ff BM |
1052 | |
1053 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
1054 | { |
1055 | if (group->meth->mul == 0) | |
1056 | /* use default */ | |
1057 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 1058 | |
0f113f3e MC |
1059 | if (group->meth->precompute_mult != 0) |
1060 | return group->meth->precompute_mult(group, ctx); | |
1061 | else | |
1062 | return 1; /* nothing to do, so report success */ | |
1063 | } | |
37c660ff BM |
1064 | |
1065 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
1066 | { |
1067 | if (group->meth->mul == 0) | |
1068 | /* use default */ | |
1069 | return ec_wNAF_have_precompute_mult(group); | |
1070 | ||
1071 | if (group->meth->have_precompute_mult != 0) | |
1072 | return group->meth->have_precompute_mult(group); | |
1073 | else | |
1074 | return 0; /* cannot tell whether precomputation has | |
1075 | * been performed */ | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
1080 | * returns one on success. On error it returns zero. | |
1081 | */ | |
f54be179 | 1082 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
1083 | { |
1084 | BN_CTX *ctx = BN_CTX_new(); | |
1085 | int ret = 0; | |
1086 | ||
23a1d5e9 RS |
1087 | BN_MONT_CTX_free(group->mont_data); |
1088 | group->mont_data = NULL; | |
0f113f3e MC |
1089 | |
1090 | if (ctx == NULL) | |
1091 | goto err; | |
1092 | ||
1093 | group->mont_data = BN_MONT_CTX_new(); | |
1094 | if (!group->mont_data) | |
1095 | goto err; | |
1096 | ||
1097 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
1098 | BN_MONT_CTX_free(group->mont_data); | |
1099 | group->mont_data = NULL; | |
1100 | goto err; | |
1101 | } | |
1102 | ||
1103 | ret = 1; | |
1104 | ||
1105 | err: | |
1106 | ||
23a1d5e9 | 1107 | BN_CTX_free(ctx); |
0f113f3e MC |
1108 | return ret; |
1109 | } |