]>
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 | |
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: | |
120 | if (ret->order) | |
121 | BN_free(ret->order); | |
122 | if (ret->cofactor) | |
123 | BN_free(ret->cofactor); | |
124 | OPENSSL_free(ret); | |
125 | return NULL; | |
126 | } | |
0657bf9c | 127 | |
0657bf9c | 128 | void EC_GROUP_free(EC_GROUP *group) |
0f113f3e MC |
129 | { |
130 | if (!group) | |
131 | return; | |
7711de24 | 132 | |
0f113f3e MC |
133 | if (group->meth->group_finish != 0) |
134 | group->meth->group_finish(group); | |
df9cc153 | 135 | |
0f113f3e | 136 | EC_EX_DATA_free_all_data(&group->extra_data); |
df9cc153 | 137 | |
0f113f3e MC |
138 | if (group->mont_data) |
139 | BN_MONT_CTX_free(group->mont_data); | |
f54be179 | 140 | |
8fdc3734 | 141 | EC_POINT_free(group->generator); |
0f113f3e MC |
142 | BN_free(group->order); |
143 | BN_free(group->cofactor); | |
b6db386f | 144 | |
0f113f3e MC |
145 | if (group->seed) |
146 | OPENSSL_free(group->seed); | |
458c2917 | 147 | |
0f113f3e MC |
148 | OPENSSL_free(group); |
149 | } | |
0657bf9c BM |
150 | |
151 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
152 | { |
153 | if (!group) | |
154 | return; | |
df9cc153 | 155 | |
0f113f3e MC |
156 | if (group->meth->group_clear_finish != 0) |
157 | group->meth->group_clear_finish(group); | |
158 | else if (group->meth->group_finish != 0) | |
159 | group->meth->group_finish(group); | |
df9cc153 | 160 | |
0f113f3e | 161 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
f54be179 | 162 | |
0f113f3e MC |
163 | if (group->mont_data) |
164 | BN_MONT_CTX_free(group->mont_data); | |
b6db386f | 165 | |
8fdc3734 | 166 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
167 | BN_clear_free(group->order); |
168 | BN_clear_free(group->cofactor); | |
4b45c6e5 RS |
169 | OPENSSL_clear_free(group->seed, group->seed_len); |
170 | OPENSSL_clear_free(group, sizeof *group); | |
0f113f3e | 171 | } |
0657bf9c BM |
172 | |
173 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e MC |
174 | { |
175 | EC_EXTRA_DATA *d; | |
176 | ||
177 | if (dest->meth->group_copy == 0) { | |
178 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
179 | return 0; | |
180 | } | |
181 | if (dest->meth != src->meth) { | |
182 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
183 | return 0; | |
184 | } | |
185 | if (dest == src) | |
186 | return 1; | |
187 | ||
188 | EC_EX_DATA_free_all_data(&dest->extra_data); | |
189 | ||
190 | for (d = src->extra_data; d != NULL; d = d->next) { | |
191 | void *t = d->dup_func(d->data); | |
192 | ||
193 | if (t == NULL) | |
194 | return 0; | |
195 | if (!EC_EX_DATA_set_data | |
196 | (&dest->extra_data, t, d->dup_func, d->free_func, | |
197 | d->clear_free_func)) | |
198 | return 0; | |
199 | } | |
200 | ||
201 | if (src->mont_data != NULL) { | |
202 | if (dest->mont_data == NULL) { | |
203 | dest->mont_data = BN_MONT_CTX_new(); | |
204 | if (dest->mont_data == NULL) | |
205 | return 0; | |
206 | } | |
207 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
208 | return 0; | |
209 | } else { | |
210 | /* src->generator == NULL */ | |
211 | if (dest->mont_data != NULL) { | |
212 | BN_MONT_CTX_free(dest->mont_data); | |
213 | dest->mont_data = NULL; | |
214 | } | |
215 | } | |
0657bf9c | 216 | |
0f113f3e MC |
217 | if (src->generator != NULL) { |
218 | if (dest->generator == NULL) { | |
219 | dest->generator = EC_POINT_new(dest); | |
220 | if (dest->generator == NULL) | |
221 | return 0; | |
222 | } | |
223 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
224 | return 0; | |
225 | } else { | |
226 | /* src->generator == NULL */ | |
8fdc3734 RS |
227 | EC_POINT_clear_free(dest->generator); |
228 | dest->generator = NULL; | |
0f113f3e MC |
229 | } |
230 | ||
231 | if (!BN_copy(dest->order, src->order)) | |
232 | return 0; | |
233 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
234 | return 0; | |
235 | ||
236 | dest->curve_name = src->curve_name; | |
237 | dest->asn1_flag = src->asn1_flag; | |
238 | dest->asn1_form = src->asn1_form; | |
239 | ||
240 | if (src->seed) { | |
241 | if (dest->seed) | |
242 | OPENSSL_free(dest->seed); | |
243 | dest->seed = OPENSSL_malloc(src->seed_len); | |
244 | if (dest->seed == NULL) | |
245 | return 0; | |
246 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
247 | return 0; | |
248 | dest->seed_len = src->seed_len; | |
249 | } else { | |
250 | if (dest->seed) | |
251 | OPENSSL_free(dest->seed); | |
252 | dest->seed = NULL; | |
253 | dest->seed_len = 0; | |
254 | } | |
255 | ||
256 | return dest->meth->group_copy(dest, src); | |
257 | } | |
0657bf9c | 258 | |
7793f30e | 259 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
260 | { |
261 | EC_GROUP *t = NULL; | |
262 | int ok = 0; | |
7793f30e | 263 | |
0f113f3e MC |
264 | if (a == NULL) |
265 | return NULL; | |
7793f30e | 266 | |
0f113f3e MC |
267 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
268 | return (NULL); | |
269 | if (!EC_GROUP_copy(t, a)) | |
270 | goto err; | |
7793f30e | 271 | |
0f113f3e | 272 | ok = 1; |
7793f30e | 273 | |
0f113f3e MC |
274 | err: |
275 | if (!ok) { | |
8fdc3734 | 276 | EC_GROUP_free(t); |
0f113f3e | 277 | return NULL; |
8fdc3734 | 278 | } |
0f113f3e MC |
279 | return t; |
280 | } | |
7793f30e | 281 | |
48fe4d62 | 282 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
283 | { |
284 | return group->meth; | |
285 | } | |
48fe4d62 | 286 | |
458c2917 | 287 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
288 | { |
289 | return meth->field_type; | |
290 | } | |
291 | ||
292 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
293 | const BIGNUM *order, const BIGNUM *cofactor) | |
294 | { | |
295 | if (generator == NULL) { | |
296 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | if (group->generator == NULL) { | |
301 | group->generator = EC_POINT_new(group); | |
302 | if (group->generator == NULL) | |
303 | return 0; | |
304 | } | |
305 | if (!EC_POINT_copy(group->generator, generator)) | |
306 | return 0; | |
307 | ||
308 | if (order != NULL) { | |
309 | if (!BN_copy(group->order, order)) | |
310 | return 0; | |
311 | } else | |
312 | BN_zero(group->order); | |
313 | ||
314 | if (cofactor != NULL) { | |
315 | if (!BN_copy(group->cofactor, cofactor)) | |
316 | return 0; | |
317 | } else | |
318 | BN_zero(group->cofactor); | |
319 | ||
320 | /* | |
321 | * We ignore the return value because some groups have an order with | |
322 | * factors of two, which makes the Montgomery setup fail. | |
323 | * |group->mont_data| will be NULL in this case. | |
324 | */ | |
325 | ec_precompute_mont_data(group); | |
326 | ||
327 | return 1; | |
328 | } | |
bb62a8b0 | 329 | |
9dd84053 | 330 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
331 | { |
332 | return group->generator; | |
333 | } | |
bb62a8b0 | 334 | |
f54be179 | 335 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
336 | { |
337 | return group->mont_data; | |
338 | } | |
bb62a8b0 | 339 | |
b6db386f | 340 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
341 | { |
342 | if (!BN_copy(order, group->order)) | |
343 | return 0; | |
0657bf9c | 344 | |
0f113f3e MC |
345 | return !BN_is_zero(order); |
346 | } | |
0657bf9c | 347 | |
0f113f3e MC |
348 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
349 | BN_CTX *ctx) | |
350 | { | |
351 | if (!BN_copy(cofactor, group->cofactor)) | |
352 | return 0; | |
48fe4d62 | 353 | |
0f113f3e MC |
354 | return !BN_is_zero(group->cofactor); |
355 | } | |
48fe4d62 | 356 | |
7dc17a6c | 357 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
358 | { |
359 | group->curve_name = nid; | |
360 | } | |
b6db386f | 361 | |
7dc17a6c | 362 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
363 | { |
364 | return group->curve_name; | |
365 | } | |
b6db386f | 366 | |
458c2917 | 367 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
368 | { |
369 | group->asn1_flag = flag; | |
370 | } | |
458c2917 BM |
371 | |
372 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
373 | { |
374 | return group->asn1_flag; | |
375 | } | |
458c2917 | 376 | |
0f113f3e | 377 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 378 | point_conversion_form_t form) |
0f113f3e MC |
379 | { |
380 | group->asn1_form = form; | |
381 | } | |
254ef80d | 382 | |
0f113f3e MC |
383 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
384 | *group) | |
385 | { | |
386 | return group->asn1_form; | |
387 | } | |
254ef80d | 388 | |
5f3d6f70 | 389 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e MC |
390 | { |
391 | if (group->seed) { | |
392 | OPENSSL_free(group->seed); | |
393 | group->seed = NULL; | |
394 | group->seed_len = 0; | |
395 | } | |
5f3d6f70 | 396 | |
0f113f3e MC |
397 | if (!len || !p) |
398 | return 1; | |
5f3d6f70 | 399 | |
0f113f3e MC |
400 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
401 | return 0; | |
402 | memcpy(group->seed, p, len); | |
403 | group->seed_len = len; | |
5f3d6f70 | 404 | |
0f113f3e MC |
405 | return len; |
406 | } | |
5f3d6f70 BM |
407 | |
408 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
409 | { |
410 | return group->seed; | |
411 | } | |
5f3d6f70 BM |
412 | |
413 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
414 | { |
415 | return group->seed_len; | |
416 | } | |
417 | ||
418 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
419 | const BIGNUM *b, BN_CTX *ctx) | |
420 | { | |
421 | if (group->meth->group_set_curve == 0) { | |
422 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
423 | return 0; | |
424 | } | |
425 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
426 | } | |
427 | ||
428 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
429 | BIGNUM *b, BN_CTX *ctx) | |
430 | { | |
431 | if (group->meth->group_get_curve == 0) { | |
432 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
433 | return 0; | |
434 | } | |
435 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
436 | } | |
7793f30e | 437 | |
b3310161 | 438 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
439 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
440 | const BIGNUM *b, BN_CTX *ctx) | |
441 | { | |
442 | if (group->meth->group_set_curve == 0) { | |
443 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
444 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
445 | return 0; | |
446 | } | |
447 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
448 | } | |
449 | ||
450 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
451 | BIGNUM *b, BN_CTX *ctx) | |
452 | { | |
453 | if (group->meth->group_get_curve == 0) { | |
454 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
455 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
456 | return 0; | |
457 | } | |
458 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
459 | } | |
b3310161 | 460 | #endif |
7793f30e BM |
461 | |
462 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
463 | { |
464 | if (group->meth->group_get_degree == 0) { | |
465 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
466 | return 0; | |
467 | } | |
468 | return group->meth->group_get_degree(group); | |
469 | } | |
48fe4d62 | 470 | |
17d6bb81 | 471 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
472 | { |
473 | if (group->meth->group_check_discriminant == 0) { | |
474 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
475 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
476 | return 0; | |
477 | } | |
478 | return group->meth->group_check_discriminant(group, ctx); | |
479 | } | |
af28dd6c | 480 | |
ada0e717 | 481 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
482 | { |
483 | int r = 0; | |
484 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
485 | BN_CTX *ctx_new = NULL; | |
486 | ||
487 | /* compare the field types */ | |
488 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
489 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
490 | return 1; | |
491 | /* compare the curve name (if present in both) */ | |
492 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
493 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
494 | return 1; | |
495 | ||
496 | if (!ctx) | |
497 | ctx_new = ctx = BN_CTX_new(); | |
498 | if (!ctx) | |
499 | return -1; | |
500 | ||
501 | BN_CTX_start(ctx); | |
502 | a1 = BN_CTX_get(ctx); | |
503 | a2 = BN_CTX_get(ctx); | |
504 | a3 = BN_CTX_get(ctx); | |
505 | b1 = BN_CTX_get(ctx); | |
506 | b2 = BN_CTX_get(ctx); | |
507 | b3 = BN_CTX_get(ctx); | |
508 | if (!b3) { | |
509 | BN_CTX_end(ctx); | |
510 | if (ctx_new) | |
511 | BN_CTX_free(ctx); | |
512 | return -1; | |
513 | } | |
514 | ||
515 | /* | |
516 | * XXX This approach assumes that the external representation of curves | |
517 | * over the same field type is the same. | |
518 | */ | |
519 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
520 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
521 | r = 1; | |
522 | ||
523 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
524 | r = 1; | |
525 | ||
526 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
527 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
528 | EC_GROUP_get0_generator(b), ctx)) | |
529 | r = 1; | |
530 | ||
531 | if (!r) { | |
532 | /* compare the order and cofactor */ | |
533 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
534 | !EC_GROUP_get_order(b, b1, ctx) || | |
535 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
536 | !EC_GROUP_get_cofactor(b, b2, ctx)) { | |
537 | BN_CTX_end(ctx); | |
538 | if (ctx_new) | |
539 | BN_CTX_free(ctx); | |
540 | return -1; | |
541 | } | |
542 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
543 | r = 1; | |
544 | } | |
545 | ||
546 | BN_CTX_end(ctx); | |
547 | if (ctx_new) | |
548 | BN_CTX_free(ctx); | |
ada0e717 | 549 | |
0f113f3e MC |
550 | return r; |
551 | } | |
ada0e717 | 552 | |
df9cc153 | 553 | /* this has 'package' visibility */ |
9dd84053 | 554 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
0f113f3e MC |
555 | void *(*dup_func) (void *), |
556 | void (*free_func) (void *), | |
557 | void (*clear_free_func) (void *)) | |
558 | { | |
559 | EC_EXTRA_DATA *d; | |
560 | ||
561 | if (ex_data == NULL) | |
562 | return 0; | |
563 | ||
564 | for (d = *ex_data; d != NULL; d = d->next) { | |
565 | if (d->dup_func == dup_func && d->free_func == free_func | |
566 | && d->clear_free_func == clear_free_func) { | |
567 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); | |
568 | return 0; | |
569 | } | |
570 | } | |
df9cc153 | 571 | |
0f113f3e MC |
572 | if (data == NULL) |
573 | /* no explicit entry needed */ | |
574 | return 1; | |
ba729265 | 575 | |
0f113f3e MC |
576 | d = OPENSSL_malloc(sizeof *d); |
577 | if (d == NULL) | |
578 | return 0; | |
ba729265 | 579 | |
0f113f3e MC |
580 | d->data = data; |
581 | d->dup_func = dup_func; | |
582 | d->free_func = free_func; | |
583 | d->clear_free_func = clear_free_func; | |
ba729265 | 584 | |
0f113f3e MC |
585 | d->next = *ex_data; |
586 | *ex_data = d; | |
ba729265 | 587 | |
0f113f3e MC |
588 | return 1; |
589 | } | |
df9cc153 | 590 | |
df9cc153 | 591 | /* this has 'package' visibility */ |
9dd84053 | 592 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
0f113f3e MC |
593 | void *(*dup_func) (void *), |
594 | void (*free_func) (void *), | |
595 | void (*clear_free_func) (void *)) | |
596 | { | |
597 | const EC_EXTRA_DATA *d; | |
598 | ||
599 | for (d = ex_data; d != NULL; d = d->next) { | |
600 | if (d->dup_func == dup_func && d->free_func == free_func | |
601 | && d->clear_free_func == clear_free_func) | |
602 | return d->data; | |
603 | } | |
604 | ||
605 | return NULL; | |
606 | } | |
df9cc153 | 607 | |
ba729265 | 608 | /* this has 'package' visibility */ |
9dd84053 | 609 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
610 | void *(*dup_func) (void *), |
611 | void (*free_func) (void *), | |
612 | void (*clear_free_func) (void *)) | |
613 | { | |
614 | EC_EXTRA_DATA **p; | |
615 | ||
616 | if (ex_data == NULL) | |
617 | return; | |
618 | ||
619 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
620 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
621 | && (*p)->clear_free_func == clear_free_func) { | |
622 | EC_EXTRA_DATA *next = (*p)->next; | |
623 | ||
624 | (*p)->free_func((*p)->data); | |
625 | OPENSSL_free(*p); | |
626 | ||
627 | *p = next; | |
628 | return; | |
629 | } | |
630 | } | |
631 | } | |
df9cc153 | 632 | |
ba729265 | 633 | /* this has 'package' visibility */ |
bbbd6710 | 634 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
635 | void *(*dup_func) (void *), |
636 | void (*free_func) (void *), | |
637 | void (*clear_free_func) (void *)) | |
638 | { | |
639 | EC_EXTRA_DATA **p; | |
640 | ||
641 | if (ex_data == NULL) | |
642 | return; | |
643 | ||
644 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
645 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
646 | && (*p)->clear_free_func == clear_free_func) { | |
647 | EC_EXTRA_DATA *next = (*p)->next; | |
648 | ||
649 | (*p)->clear_free_func((*p)->data); | |
650 | OPENSSL_free(*p); | |
651 | ||
652 | *p = next; | |
653 | return; | |
654 | } | |
655 | } | |
656 | } | |
df9cc153 BM |
657 | |
658 | /* this has 'package' visibility */ | |
9dd84053 | 659 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
660 | { |
661 | EC_EXTRA_DATA *d; | |
662 | ||
663 | if (ex_data == NULL) | |
664 | return; | |
665 | ||
666 | d = *ex_data; | |
667 | while (d) { | |
668 | EC_EXTRA_DATA *next = d->next; | |
669 | ||
670 | d->free_func(d->data); | |
671 | OPENSSL_free(d); | |
672 | ||
673 | d = next; | |
674 | } | |
675 | *ex_data = NULL; | |
676 | } | |
df9cc153 | 677 | |
df9cc153 | 678 | /* this has 'package' visibility */ |
9dd84053 | 679 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
680 | { |
681 | EC_EXTRA_DATA *d; | |
682 | ||
683 | if (ex_data == NULL) | |
684 | return; | |
685 | ||
686 | d = *ex_data; | |
687 | while (d) { | |
688 | EC_EXTRA_DATA *next = d->next; | |
689 | ||
690 | d->clear_free_func(d->data); | |
691 | OPENSSL_free(d); | |
df9cc153 | 692 | |
0f113f3e MC |
693 | d = next; |
694 | } | |
695 | *ex_data = NULL; | |
696 | } | |
0657bf9c BM |
697 | |
698 | /* functions for EC_POINT objects */ | |
699 | ||
700 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
701 | { |
702 | EC_POINT *ret; | |
703 | ||
704 | if (group == NULL) { | |
705 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
706 | return NULL; | |
707 | } | |
708 | if (group->meth->point_init == 0) { | |
709 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
710 | return NULL; | |
711 | } | |
712 | ||
713 | ret = OPENSSL_malloc(sizeof *ret); | |
714 | if (ret == NULL) { | |
715 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | ret->meth = group->meth; | |
720 | ||
721 | if (!ret->meth->point_init(ret)) { | |
722 | OPENSSL_free(ret); | |
723 | return NULL; | |
724 | } | |
725 | ||
726 | return ret; | |
727 | } | |
0657bf9c BM |
728 | |
729 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
730 | { |
731 | if (!point) | |
732 | return; | |
7711de24 | 733 | |
0f113f3e MC |
734 | if (point->meth->point_finish != 0) |
735 | point->meth->point_finish(point); | |
736 | OPENSSL_free(point); | |
737 | } | |
0657bf9c BM |
738 | |
739 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
740 | { |
741 | if (!point) | |
742 | return; | |
743 | ||
744 | if (point->meth->point_clear_finish != 0) | |
745 | point->meth->point_clear_finish(point); | |
746 | else if (point->meth->point_finish != 0) | |
747 | point->meth->point_finish(point); | |
4b45c6e5 | 748 | OPENSSL_clear_free(point, sizeof *point); |
0f113f3e | 749 | } |
0657bf9c BM |
750 | |
751 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
752 | { |
753 | if (dest->meth->point_copy == 0) { | |
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 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
759 | return 0; | |
760 | } | |
761 | if (dest == src) | |
762 | return 1; | |
763 | return dest->meth->point_copy(dest, src); | |
764 | } | |
0657bf9c | 765 | |
7793f30e | 766 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
767 | { |
768 | EC_POINT *t; | |
769 | int r; | |
770 | ||
771 | if (a == NULL) | |
772 | return NULL; | |
773 | ||
774 | t = EC_POINT_new(group); | |
775 | if (t == NULL) | |
776 | return (NULL); | |
777 | r = EC_POINT_copy(t, a); | |
778 | if (!r) { | |
779 | EC_POINT_free(t); | |
780 | return NULL; | |
8fdc3734 RS |
781 | } |
782 | return t; | |
0f113f3e | 783 | } |
7793f30e | 784 | |
48fe4d62 | 785 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
786 | { |
787 | return point->meth; | |
788 | } | |
48fe4d62 | 789 | |
226cc7de | 790 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
791 | { |
792 | if (group->meth->point_set_to_infinity == 0) { | |
793 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
794 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
795 | return 0; | |
796 | } | |
797 | if (group->meth != point->meth) { | |
798 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
799 | return 0; | |
800 | } | |
801 | return group->meth->point_set_to_infinity(group, point); | |
802 | } | |
803 | ||
804 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
805 | EC_POINT *point, const BIGNUM *x, | |
806 | const BIGNUM *y, const BIGNUM *z, | |
807 | BN_CTX *ctx) | |
808 | { | |
809 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
810 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
811 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
812 | return 0; | |
813 | } | |
814 | if (group->meth != point->meth) { | |
815 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
816 | EC_R_INCOMPATIBLE_OBJECTS); | |
817 | return 0; | |
818 | } | |
819 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
820 | y, z, ctx); | |
821 | } | |
822 | ||
823 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
824 | const EC_POINT *point, BIGNUM *x, | |
825 | BIGNUM *y, BIGNUM *z, | |
826 | BN_CTX *ctx) | |
827 | { | |
828 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
829 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
830 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
831 | return 0; | |
832 | } | |
833 | if (group->meth != point->meth) { | |
834 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
835 | EC_R_INCOMPATIBLE_OBJECTS); | |
836 | return 0; | |
837 | } | |
838 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
839 | y, z, ctx); | |
840 | } | |
841 | ||
842 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
843 | EC_POINT *point, const BIGNUM *x, | |
844 | const BIGNUM *y, BN_CTX *ctx) | |
845 | { | |
846 | if (group->meth->point_set_affine_coordinates == 0) { | |
847 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
848 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
849 | return 0; | |
850 | } | |
851 | if (group->meth != point->meth) { | |
852 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
853 | EC_R_INCOMPATIBLE_OBJECTS); | |
854 | return 0; | |
855 | } | |
856 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
857 | } | |
226cc7de | 858 | |
b3310161 | 859 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
860 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
861 | EC_POINT *point, const BIGNUM *x, | |
862 | const BIGNUM *y, BN_CTX *ctx) | |
863 | { | |
864 | if (group->meth->point_set_affine_coordinates == 0) { | |
865 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
866 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
867 | return 0; | |
868 | } | |
869 | if (group->meth != point->meth) { | |
870 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
871 | EC_R_INCOMPATIBLE_OBJECTS); | |
872 | return 0; | |
873 | } | |
874 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
875 | } | |
b3310161 | 876 | #endif |
7793f30e | 877 | |
0f113f3e MC |
878 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
879 | const EC_POINT *point, BIGNUM *x, | |
880 | BIGNUM *y, BN_CTX *ctx) | |
881 | { | |
882 | if (group->meth->point_get_affine_coordinates == 0) { | |
883 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
884 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
885 | return 0; | |
886 | } | |
887 | if (group->meth != point->meth) { | |
888 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
889 | EC_R_INCOMPATIBLE_OBJECTS); | |
890 | return 0; | |
891 | } | |
892 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
893 | } | |
7793f30e | 894 | |
b3310161 | 895 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
896 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
897 | const EC_POINT *point, BIGNUM *x, | |
898 | BIGNUM *y, BN_CTX *ctx) | |
899 | { | |
900 | if (group->meth->point_get_affine_coordinates == 0) { | |
901 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
902 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
903 | return 0; | |
904 | } | |
905 | if (group->meth != point->meth) { | |
906 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
907 | EC_R_INCOMPATIBLE_OBJECTS); | |
908 | return 0; | |
909 | } | |
910 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
911 | } | |
b3310161 | 912 | #endif |
7793f30e | 913 | |
0f113f3e MC |
914 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
915 | const EC_POINT *b, BN_CTX *ctx) | |
916 | { | |
917 | if (group->meth->add == 0) { | |
918 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
919 | return 0; | |
920 | } | |
921 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
922 | || (a->meth != b->meth)) { | |
923 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
924 | return 0; | |
925 | } | |
926 | return group->meth->add(group, r, a, b, ctx); | |
927 | } | |
928 | ||
929 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
930 | BN_CTX *ctx) | |
931 | { | |
932 | if (group->meth->dbl == 0) { | |
933 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
934 | return 0; | |
935 | } | |
936 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
937 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
938 | return 0; | |
939 | } | |
940 | return group->meth->dbl(group, r, a, ctx); | |
941 | } | |
0657bf9c | 942 | |
1d5bd6cf | 943 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
944 | { |
945 | if (group->meth->invert == 0) { | |
946 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
947 | return 0; | |
948 | } | |
949 | if (group->meth != a->meth) { | |
950 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
951 | return 0; | |
952 | } | |
953 | return group->meth->invert(group, a, ctx); | |
954 | } | |
1d5bd6cf | 955 | |
0657bf9c | 956 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
957 | { |
958 | if (group->meth->is_at_infinity == 0) { | |
959 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
960 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
961 | return 0; | |
962 | } | |
963 | if (group->meth != point->meth) { | |
964 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
965 | return 0; | |
966 | } | |
967 | return group->meth->is_at_infinity(group, point); | |
968 | } | |
969 | ||
970 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, | |
971 | BN_CTX *ctx) | |
972 | { | |
973 | if (group->meth->is_on_curve == 0) { | |
974 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
975 | return 0; | |
976 | } | |
977 | if (group->meth != point->meth) { | |
978 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
979 | return 0; | |
980 | } | |
981 | return group->meth->is_on_curve(group, point, ctx); | |
982 | } | |
983 | ||
984 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
985 | BN_CTX *ctx) | |
986 | { | |
987 | if (group->meth->point_cmp == 0) { | |
988 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
989 | return -1; | |
990 | } | |
991 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
992 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
993 | return -1; | |
994 | } | |
995 | return group->meth->point_cmp(group, a, b, ctx); | |
996 | } | |
1d5bd6cf | 997 | |
e869d4bd | 998 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
999 | { |
1000 | if (group->meth->make_affine == 0) { | |
1001 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1002 | return 0; | |
1003 | } | |
1004 | if (group->meth != point->meth) { | |
1005 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1006 | return 0; | |
1007 | } | |
1008 | return group->meth->make_affine(group, point, ctx); | |
1009 | } | |
1010 | ||
1011 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
1012 | EC_POINT *points[], BN_CTX *ctx) | |
1013 | { | |
1014 | size_t i; | |
1015 | ||
1016 | if (group->meth->points_make_affine == 0) { | |
1017 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1018 | return 0; | |
1019 | } | |
1020 | for (i = 0; i < num; i++) { | |
1021 | if (group->meth != points[i]->meth) { | |
1022 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1023 | return 0; | |
1024 | } | |
1025 | } | |
1026 | return group->meth->points_make_affine(group, num, points, ctx); | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
1031 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
1032 | * methods. | |
37c660ff BM |
1033 | */ |
1034 | ||
1035 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
1036 | size_t num, const EC_POINT *points[], |
1037 | const BIGNUM *scalars[], BN_CTX *ctx) | |
1038 | { | |
1039 | if (group->meth->mul == 0) | |
1040 | /* use default */ | |
1041 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 1042 | |
0f113f3e MC |
1043 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
1044 | } | |
37c660ff BM |
1045 | |
1046 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
1047 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
1048 | { | |
1049 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 1050 | |
0f113f3e MC |
1051 | const EC_POINT *points[1]; |
1052 | const BIGNUM *scalars[1]; | |
37c660ff | 1053 | |
0f113f3e MC |
1054 | points[0] = point; |
1055 | scalars[0] = p_scalar; | |
37c660ff | 1056 | |
0f113f3e MC |
1057 | return EC_POINTs_mul(group, r, g_scalar, |
1058 | (point != NULL | |
1059 | && p_scalar != NULL), points, scalars, ctx); | |
1060 | } | |
37c660ff BM |
1061 | |
1062 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
1063 | { |
1064 | if (group->meth->mul == 0) | |
1065 | /* use default */ | |
1066 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 1067 | |
0f113f3e MC |
1068 | if (group->meth->precompute_mult != 0) |
1069 | return group->meth->precompute_mult(group, ctx); | |
1070 | else | |
1071 | return 1; /* nothing to do, so report success */ | |
1072 | } | |
37c660ff BM |
1073 | |
1074 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
1075 | { |
1076 | if (group->meth->mul == 0) | |
1077 | /* use default */ | |
1078 | return ec_wNAF_have_precompute_mult(group); | |
1079 | ||
1080 | if (group->meth->have_precompute_mult != 0) | |
1081 | return group->meth->have_precompute_mult(group); | |
1082 | else | |
1083 | return 0; /* cannot tell whether precomputation has | |
1084 | * been performed */ | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
1089 | * returns one on success. On error it returns zero. | |
1090 | */ | |
f54be179 | 1091 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
1092 | { |
1093 | BN_CTX *ctx = BN_CTX_new(); | |
1094 | int ret = 0; | |
1095 | ||
1096 | if (group->mont_data) { | |
1097 | BN_MONT_CTX_free(group->mont_data); | |
1098 | group->mont_data = NULL; | |
1099 | } | |
1100 | ||
1101 | if (ctx == NULL) | |
1102 | goto err; | |
1103 | ||
1104 | group->mont_data = BN_MONT_CTX_new(); | |
1105 | if (!group->mont_data) | |
1106 | goto err; | |
1107 | ||
1108 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
1109 | BN_MONT_CTX_free(group->mont_data); | |
1110 | group->mont_data = NULL; | |
1111 | goto err; | |
1112 | } | |
1113 | ||
1114 | ret = 1; | |
1115 | ||
1116 | err: | |
1117 | ||
1118 | if (ctx) | |
1119 | BN_CTX_free(ctx); | |
1120 | return ret; | |
1121 | } |