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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) { | |
b548a1f1 | 235 | OPENSSL_free(dest->seed); |
0f113f3e MC |
236 | dest->seed = OPENSSL_malloc(src->seed_len); |
237 | if (dest->seed == NULL) | |
238 | return 0; | |
239 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
240 | return 0; | |
241 | dest->seed_len = src->seed_len; | |
242 | } else { | |
b548a1f1 | 243 | OPENSSL_free(dest->seed); |
0f113f3e MC |
244 | dest->seed = NULL; |
245 | dest->seed_len = 0; | |
246 | } | |
247 | ||
248 | return dest->meth->group_copy(dest, src); | |
249 | } | |
0657bf9c | 250 | |
7793f30e | 251 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
252 | { |
253 | EC_GROUP *t = NULL; | |
254 | int ok = 0; | |
7793f30e | 255 | |
0f113f3e MC |
256 | if (a == NULL) |
257 | return NULL; | |
7793f30e | 258 | |
0f113f3e MC |
259 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
260 | return (NULL); | |
261 | if (!EC_GROUP_copy(t, a)) | |
262 | goto err; | |
7793f30e | 263 | |
0f113f3e | 264 | ok = 1; |
7793f30e | 265 | |
0f113f3e MC |
266 | err: |
267 | if (!ok) { | |
8fdc3734 | 268 | EC_GROUP_free(t); |
0f113f3e | 269 | return NULL; |
8fdc3734 | 270 | } |
0f113f3e MC |
271 | return t; |
272 | } | |
7793f30e | 273 | |
48fe4d62 | 274 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
275 | { |
276 | return group->meth; | |
277 | } | |
48fe4d62 | 278 | |
458c2917 | 279 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
280 | { |
281 | return meth->field_type; | |
282 | } | |
283 | ||
284 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
285 | const BIGNUM *order, const BIGNUM *cofactor) | |
286 | { | |
287 | if (generator == NULL) { | |
288 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | if (group->generator == NULL) { | |
293 | group->generator = EC_POINT_new(group); | |
294 | if (group->generator == NULL) | |
295 | return 0; | |
296 | } | |
297 | if (!EC_POINT_copy(group->generator, generator)) | |
298 | return 0; | |
299 | ||
300 | if (order != NULL) { | |
301 | if (!BN_copy(group->order, order)) | |
302 | return 0; | |
303 | } else | |
304 | BN_zero(group->order); | |
305 | ||
306 | if (cofactor != NULL) { | |
307 | if (!BN_copy(group->cofactor, cofactor)) | |
308 | return 0; | |
309 | } else | |
310 | BN_zero(group->cofactor); | |
311 | ||
312 | /* | |
313 | * We ignore the return value because some groups have an order with | |
314 | * factors of two, which makes the Montgomery setup fail. | |
315 | * |group->mont_data| will be NULL in this case. | |
316 | */ | |
317 | ec_precompute_mont_data(group); | |
318 | ||
319 | return 1; | |
320 | } | |
bb62a8b0 | 321 | |
9dd84053 | 322 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
323 | { |
324 | return group->generator; | |
325 | } | |
bb62a8b0 | 326 | |
f54be179 | 327 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
328 | { |
329 | return group->mont_data; | |
330 | } | |
bb62a8b0 | 331 | |
b6db386f | 332 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
333 | { |
334 | if (!BN_copy(order, group->order)) | |
335 | return 0; | |
0657bf9c | 336 | |
0f113f3e MC |
337 | return !BN_is_zero(order); |
338 | } | |
0657bf9c | 339 | |
0f113f3e MC |
340 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
341 | BN_CTX *ctx) | |
342 | { | |
343 | if (!BN_copy(cofactor, group->cofactor)) | |
344 | return 0; | |
48fe4d62 | 345 | |
0f113f3e MC |
346 | return !BN_is_zero(group->cofactor); |
347 | } | |
48fe4d62 | 348 | |
7dc17a6c | 349 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
350 | { |
351 | group->curve_name = nid; | |
352 | } | |
b6db386f | 353 | |
7dc17a6c | 354 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
355 | { |
356 | return group->curve_name; | |
357 | } | |
b6db386f | 358 | |
458c2917 | 359 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
360 | { |
361 | group->asn1_flag = flag; | |
362 | } | |
458c2917 BM |
363 | |
364 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
365 | { |
366 | return group->asn1_flag; | |
367 | } | |
458c2917 | 368 | |
0f113f3e | 369 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 370 | point_conversion_form_t form) |
0f113f3e MC |
371 | { |
372 | group->asn1_form = form; | |
373 | } | |
254ef80d | 374 | |
0f113f3e MC |
375 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
376 | *group) | |
377 | { | |
378 | return group->asn1_form; | |
379 | } | |
254ef80d | 380 | |
5f3d6f70 | 381 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 382 | { |
b548a1f1 RS |
383 | OPENSSL_free(group->seed); |
384 | group->seed = NULL; | |
385 | group->seed_len = 0; | |
5f3d6f70 | 386 | |
0f113f3e MC |
387 | if (!len || !p) |
388 | return 1; | |
5f3d6f70 | 389 | |
0f113f3e MC |
390 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
391 | return 0; | |
392 | memcpy(group->seed, p, len); | |
393 | group->seed_len = len; | |
5f3d6f70 | 394 | |
0f113f3e MC |
395 | return len; |
396 | } | |
5f3d6f70 BM |
397 | |
398 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
399 | { |
400 | return group->seed; | |
401 | } | |
5f3d6f70 BM |
402 | |
403 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
404 | { |
405 | return group->seed_len; | |
406 | } | |
407 | ||
408 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
409 | const BIGNUM *b, BN_CTX *ctx) | |
410 | { | |
411 | if (group->meth->group_set_curve == 0) { | |
412 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
413 | return 0; | |
414 | } | |
415 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
416 | } | |
417 | ||
418 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
419 | BIGNUM *b, BN_CTX *ctx) | |
420 | { | |
421 | if (group->meth->group_get_curve == 0) { | |
422 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
423 | return 0; | |
424 | } | |
425 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
426 | } | |
7793f30e | 427 | |
b3310161 | 428 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
429 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
430 | const BIGNUM *b, BN_CTX *ctx) | |
431 | { | |
432 | if (group->meth->group_set_curve == 0) { | |
433 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
434 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
435 | return 0; | |
436 | } | |
437 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
438 | } | |
439 | ||
440 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
441 | BIGNUM *b, BN_CTX *ctx) | |
442 | { | |
443 | if (group->meth->group_get_curve == 0) { | |
444 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
445 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
446 | return 0; | |
447 | } | |
448 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
449 | } | |
b3310161 | 450 | #endif |
7793f30e BM |
451 | |
452 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
453 | { |
454 | if (group->meth->group_get_degree == 0) { | |
455 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
456 | return 0; | |
457 | } | |
458 | return group->meth->group_get_degree(group); | |
459 | } | |
48fe4d62 | 460 | |
17d6bb81 | 461 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
462 | { |
463 | if (group->meth->group_check_discriminant == 0) { | |
464 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
465 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
466 | return 0; | |
467 | } | |
468 | return group->meth->group_check_discriminant(group, ctx); | |
469 | } | |
af28dd6c | 470 | |
ada0e717 | 471 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
472 | { |
473 | int r = 0; | |
474 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
475 | BN_CTX *ctx_new = NULL; | |
476 | ||
477 | /* compare the field types */ | |
478 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
479 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
480 | return 1; | |
481 | /* compare the curve name (if present in both) */ | |
482 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
483 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
484 | return 1; | |
485 | ||
486 | if (!ctx) | |
487 | ctx_new = ctx = BN_CTX_new(); | |
488 | if (!ctx) | |
489 | return -1; | |
490 | ||
491 | BN_CTX_start(ctx); | |
492 | a1 = BN_CTX_get(ctx); | |
493 | a2 = BN_CTX_get(ctx); | |
494 | a3 = BN_CTX_get(ctx); | |
495 | b1 = BN_CTX_get(ctx); | |
496 | b2 = BN_CTX_get(ctx); | |
497 | b3 = BN_CTX_get(ctx); | |
498 | if (!b3) { | |
499 | BN_CTX_end(ctx); | |
23a1d5e9 | 500 | BN_CTX_free(ctx_new); |
0f113f3e MC |
501 | return -1; |
502 | } | |
503 | ||
504 | /* | |
505 | * XXX This approach assumes that the external representation of curves | |
506 | * over the same field type is the same. | |
507 | */ | |
508 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
509 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
510 | r = 1; | |
511 | ||
512 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
513 | r = 1; | |
514 | ||
515 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
516 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
517 | EC_GROUP_get0_generator(b), ctx)) | |
518 | r = 1; | |
519 | ||
520 | if (!r) { | |
521 | /* compare the order and cofactor */ | |
522 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
523 | !EC_GROUP_get_order(b, b1, ctx) || | |
524 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
525 | !EC_GROUP_get_cofactor(b, b2, ctx)) { | |
526 | BN_CTX_end(ctx); | |
23a1d5e9 | 527 | BN_CTX_free(ctx_new); |
0f113f3e MC |
528 | return -1; |
529 | } | |
530 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
531 | r = 1; | |
532 | } | |
533 | ||
534 | BN_CTX_end(ctx); | |
23a1d5e9 | 535 | BN_CTX_free(ctx_new); |
ada0e717 | 536 | |
0f113f3e MC |
537 | return r; |
538 | } | |
ada0e717 | 539 | |
df9cc153 | 540 | /* this has 'package' visibility */ |
9dd84053 | 541 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
0f113f3e MC |
542 | void *(*dup_func) (void *), |
543 | void (*free_func) (void *), | |
544 | void (*clear_free_func) (void *)) | |
545 | { | |
546 | EC_EXTRA_DATA *d; | |
547 | ||
548 | if (ex_data == NULL) | |
549 | return 0; | |
550 | ||
551 | for (d = *ex_data; d != NULL; d = d->next) { | |
552 | if (d->dup_func == dup_func && d->free_func == free_func | |
553 | && d->clear_free_func == clear_free_func) { | |
554 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); | |
555 | return 0; | |
556 | } | |
557 | } | |
df9cc153 | 558 | |
0f113f3e MC |
559 | if (data == NULL) |
560 | /* no explicit entry needed */ | |
561 | return 1; | |
ba729265 | 562 | |
0f113f3e MC |
563 | d = OPENSSL_malloc(sizeof *d); |
564 | if (d == NULL) | |
565 | return 0; | |
ba729265 | 566 | |
0f113f3e MC |
567 | d->data = data; |
568 | d->dup_func = dup_func; | |
569 | d->free_func = free_func; | |
570 | d->clear_free_func = clear_free_func; | |
ba729265 | 571 | |
0f113f3e MC |
572 | d->next = *ex_data; |
573 | *ex_data = d; | |
ba729265 | 574 | |
0f113f3e MC |
575 | return 1; |
576 | } | |
df9cc153 | 577 | |
df9cc153 | 578 | /* this has 'package' visibility */ |
9dd84053 | 579 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
0f113f3e MC |
580 | void *(*dup_func) (void *), |
581 | void (*free_func) (void *), | |
582 | void (*clear_free_func) (void *)) | |
583 | { | |
584 | const EC_EXTRA_DATA *d; | |
585 | ||
586 | for (d = ex_data; d != NULL; d = d->next) { | |
587 | if (d->dup_func == dup_func && d->free_func == free_func | |
588 | && d->clear_free_func == clear_free_func) | |
589 | return d->data; | |
590 | } | |
591 | ||
592 | return NULL; | |
593 | } | |
df9cc153 | 594 | |
ba729265 | 595 | /* this has 'package' visibility */ |
9dd84053 | 596 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
597 | void *(*dup_func) (void *), |
598 | void (*free_func) (void *), | |
599 | void (*clear_free_func) (void *)) | |
600 | { | |
601 | EC_EXTRA_DATA **p; | |
602 | ||
603 | if (ex_data == NULL) | |
604 | return; | |
605 | ||
606 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
607 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
608 | && (*p)->clear_free_func == clear_free_func) { | |
609 | EC_EXTRA_DATA *next = (*p)->next; | |
610 | ||
611 | (*p)->free_func((*p)->data); | |
612 | OPENSSL_free(*p); | |
613 | ||
614 | *p = next; | |
615 | return; | |
616 | } | |
617 | } | |
618 | } | |
df9cc153 | 619 | |
ba729265 | 620 | /* this has 'package' visibility */ |
bbbd6710 | 621 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
622 | void *(*dup_func) (void *), |
623 | void (*free_func) (void *), | |
624 | void (*clear_free_func) (void *)) | |
625 | { | |
626 | EC_EXTRA_DATA **p; | |
627 | ||
628 | if (ex_data == NULL) | |
629 | return; | |
630 | ||
631 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
632 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
633 | && (*p)->clear_free_func == clear_free_func) { | |
634 | EC_EXTRA_DATA *next = (*p)->next; | |
635 | ||
636 | (*p)->clear_free_func((*p)->data); | |
637 | OPENSSL_free(*p); | |
638 | ||
639 | *p = next; | |
640 | return; | |
641 | } | |
642 | } | |
643 | } | |
df9cc153 BM |
644 | |
645 | /* this has 'package' visibility */ | |
9dd84053 | 646 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
647 | { |
648 | EC_EXTRA_DATA *d; | |
649 | ||
650 | if (ex_data == NULL) | |
651 | return; | |
652 | ||
653 | d = *ex_data; | |
654 | while (d) { | |
655 | EC_EXTRA_DATA *next = d->next; | |
656 | ||
657 | d->free_func(d->data); | |
658 | OPENSSL_free(d); | |
659 | ||
660 | d = next; | |
661 | } | |
662 | *ex_data = NULL; | |
663 | } | |
df9cc153 | 664 | |
df9cc153 | 665 | /* this has 'package' visibility */ |
9dd84053 | 666 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
667 | { |
668 | EC_EXTRA_DATA *d; | |
669 | ||
670 | if (ex_data == NULL) | |
671 | return; | |
672 | ||
673 | d = *ex_data; | |
674 | while (d) { | |
675 | EC_EXTRA_DATA *next = d->next; | |
676 | ||
677 | d->clear_free_func(d->data); | |
678 | OPENSSL_free(d); | |
df9cc153 | 679 | |
0f113f3e MC |
680 | d = next; |
681 | } | |
682 | *ex_data = NULL; | |
683 | } | |
0657bf9c BM |
684 | |
685 | /* functions for EC_POINT objects */ | |
686 | ||
687 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
688 | { |
689 | EC_POINT *ret; | |
690 | ||
691 | if (group == NULL) { | |
692 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
693 | return NULL; | |
694 | } | |
695 | if (group->meth->point_init == 0) { | |
696 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
697 | return NULL; | |
698 | } | |
699 | ||
700 | ret = OPENSSL_malloc(sizeof *ret); | |
701 | if (ret == NULL) { | |
702 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
703 | return NULL; | |
704 | } | |
705 | ||
706 | ret->meth = group->meth; | |
707 | ||
708 | if (!ret->meth->point_init(ret)) { | |
709 | OPENSSL_free(ret); | |
710 | return NULL; | |
711 | } | |
712 | ||
713 | return ret; | |
714 | } | |
0657bf9c BM |
715 | |
716 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
717 | { |
718 | if (!point) | |
719 | return; | |
7711de24 | 720 | |
0f113f3e MC |
721 | if (point->meth->point_finish != 0) |
722 | point->meth->point_finish(point); | |
723 | OPENSSL_free(point); | |
724 | } | |
0657bf9c BM |
725 | |
726 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
727 | { |
728 | if (!point) | |
729 | return; | |
730 | ||
731 | if (point->meth->point_clear_finish != 0) | |
732 | point->meth->point_clear_finish(point); | |
733 | else if (point->meth->point_finish != 0) | |
734 | point->meth->point_finish(point); | |
4b45c6e5 | 735 | OPENSSL_clear_free(point, sizeof *point); |
0f113f3e | 736 | } |
0657bf9c BM |
737 | |
738 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
739 | { |
740 | if (dest->meth->point_copy == 0) { | |
741 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
742 | return 0; | |
743 | } | |
744 | if (dest->meth != src->meth) { | |
745 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
746 | return 0; | |
747 | } | |
748 | if (dest == src) | |
749 | return 1; | |
750 | return dest->meth->point_copy(dest, src); | |
751 | } | |
0657bf9c | 752 | |
7793f30e | 753 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
754 | { |
755 | EC_POINT *t; | |
756 | int r; | |
757 | ||
758 | if (a == NULL) | |
759 | return NULL; | |
760 | ||
761 | t = EC_POINT_new(group); | |
762 | if (t == NULL) | |
763 | return (NULL); | |
764 | r = EC_POINT_copy(t, a); | |
765 | if (!r) { | |
766 | EC_POINT_free(t); | |
767 | return NULL; | |
8fdc3734 RS |
768 | } |
769 | return t; | |
0f113f3e | 770 | } |
7793f30e | 771 | |
48fe4d62 | 772 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
773 | { |
774 | return point->meth; | |
775 | } | |
48fe4d62 | 776 | |
226cc7de | 777 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
778 | { |
779 | if (group->meth->point_set_to_infinity == 0) { | |
780 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
781 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
782 | return 0; | |
783 | } | |
784 | if (group->meth != point->meth) { | |
785 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
786 | return 0; | |
787 | } | |
788 | return group->meth->point_set_to_infinity(group, point); | |
789 | } | |
790 | ||
791 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
792 | EC_POINT *point, const BIGNUM *x, | |
793 | const BIGNUM *y, const BIGNUM *z, | |
794 | BN_CTX *ctx) | |
795 | { | |
796 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
797 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
798 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
799 | return 0; | |
800 | } | |
801 | if (group->meth != point->meth) { | |
802 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
803 | EC_R_INCOMPATIBLE_OBJECTS); | |
804 | return 0; | |
805 | } | |
806 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
807 | y, z, ctx); | |
808 | } | |
809 | ||
810 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
811 | const EC_POINT *point, BIGNUM *x, | |
812 | BIGNUM *y, BIGNUM *z, | |
813 | BN_CTX *ctx) | |
814 | { | |
815 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
816 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
817 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
818 | return 0; | |
819 | } | |
820 | if (group->meth != point->meth) { | |
821 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
822 | EC_R_INCOMPATIBLE_OBJECTS); | |
823 | return 0; | |
824 | } | |
825 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
826 | y, z, ctx); | |
827 | } | |
828 | ||
829 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
830 | EC_POINT *point, const BIGNUM *x, | |
831 | const BIGNUM *y, BN_CTX *ctx) | |
832 | { | |
833 | if (group->meth->point_set_affine_coordinates == 0) { | |
834 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
835 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
836 | return 0; | |
837 | } | |
838 | if (group->meth != point->meth) { | |
839 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
840 | EC_R_INCOMPATIBLE_OBJECTS); | |
841 | return 0; | |
842 | } | |
843 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
844 | } | |
226cc7de | 845 | |
b3310161 | 846 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
847 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
848 | EC_POINT *point, const BIGNUM *x, | |
849 | const BIGNUM *y, BN_CTX *ctx) | |
850 | { | |
851 | if (group->meth->point_set_affine_coordinates == 0) { | |
852 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
853 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
854 | return 0; | |
855 | } | |
856 | if (group->meth != point->meth) { | |
857 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
858 | EC_R_INCOMPATIBLE_OBJECTS); | |
859 | return 0; | |
860 | } | |
861 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
862 | } | |
b3310161 | 863 | #endif |
7793f30e | 864 | |
0f113f3e MC |
865 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
866 | const EC_POINT *point, BIGNUM *x, | |
867 | BIGNUM *y, BN_CTX *ctx) | |
868 | { | |
869 | if (group->meth->point_get_affine_coordinates == 0) { | |
870 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
871 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
872 | return 0; | |
873 | } | |
874 | if (group->meth != point->meth) { | |
875 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
876 | EC_R_INCOMPATIBLE_OBJECTS); | |
877 | return 0; | |
878 | } | |
879 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
880 | } | |
7793f30e | 881 | |
b3310161 | 882 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
883 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
884 | const EC_POINT *point, BIGNUM *x, | |
885 | BIGNUM *y, BN_CTX *ctx) | |
886 | { | |
887 | if (group->meth->point_get_affine_coordinates == 0) { | |
888 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
889 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
890 | return 0; | |
891 | } | |
892 | if (group->meth != point->meth) { | |
893 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
894 | EC_R_INCOMPATIBLE_OBJECTS); | |
895 | return 0; | |
896 | } | |
897 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
898 | } | |
b3310161 | 899 | #endif |
7793f30e | 900 | |
0f113f3e MC |
901 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
902 | const EC_POINT *b, BN_CTX *ctx) | |
903 | { | |
904 | if (group->meth->add == 0) { | |
905 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
906 | return 0; | |
907 | } | |
908 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
909 | || (a->meth != b->meth)) { | |
910 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
911 | return 0; | |
912 | } | |
913 | return group->meth->add(group, r, a, b, ctx); | |
914 | } | |
915 | ||
916 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
917 | BN_CTX *ctx) | |
918 | { | |
919 | if (group->meth->dbl == 0) { | |
920 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
921 | return 0; | |
922 | } | |
923 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
924 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
925 | return 0; | |
926 | } | |
927 | return group->meth->dbl(group, r, a, ctx); | |
928 | } | |
0657bf9c | 929 | |
1d5bd6cf | 930 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
931 | { |
932 | if (group->meth->invert == 0) { | |
933 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
934 | return 0; | |
935 | } | |
936 | if (group->meth != a->meth) { | |
937 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
938 | return 0; | |
939 | } | |
940 | return group->meth->invert(group, a, ctx); | |
941 | } | |
1d5bd6cf | 942 | |
0657bf9c | 943 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
944 | { |
945 | if (group->meth->is_at_infinity == 0) { | |
946 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
947 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
948 | return 0; | |
949 | } | |
950 | if (group->meth != point->meth) { | |
951 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
952 | return 0; | |
953 | } | |
954 | return group->meth->is_at_infinity(group, point); | |
955 | } | |
956 | ||
957 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, | |
958 | BN_CTX *ctx) | |
959 | { | |
960 | if (group->meth->is_on_curve == 0) { | |
961 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
962 | return 0; | |
963 | } | |
964 | if (group->meth != point->meth) { | |
965 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
966 | return 0; | |
967 | } | |
968 | return group->meth->is_on_curve(group, point, ctx); | |
969 | } | |
970 | ||
971 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
972 | BN_CTX *ctx) | |
973 | { | |
974 | if (group->meth->point_cmp == 0) { | |
975 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
976 | return -1; | |
977 | } | |
978 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
979 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
980 | return -1; | |
981 | } | |
982 | return group->meth->point_cmp(group, a, b, ctx); | |
983 | } | |
1d5bd6cf | 984 | |
e869d4bd | 985 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
986 | { |
987 | if (group->meth->make_affine == 0) { | |
988 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
989 | return 0; | |
990 | } | |
991 | if (group->meth != point->meth) { | |
992 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
993 | return 0; | |
994 | } | |
995 | return group->meth->make_affine(group, point, ctx); | |
996 | } | |
997 | ||
998 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
999 | EC_POINT *points[], BN_CTX *ctx) | |
1000 | { | |
1001 | size_t i; | |
1002 | ||
1003 | if (group->meth->points_make_affine == 0) { | |
1004 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1005 | return 0; | |
1006 | } | |
1007 | for (i = 0; i < num; i++) { | |
1008 | if (group->meth != points[i]->meth) { | |
1009 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1010 | return 0; | |
1011 | } | |
1012 | } | |
1013 | return group->meth->points_make_affine(group, num, points, ctx); | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
1018 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
1019 | * methods. | |
37c660ff BM |
1020 | */ |
1021 | ||
1022 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
1023 | size_t num, const EC_POINT *points[], |
1024 | const BIGNUM *scalars[], BN_CTX *ctx) | |
1025 | { | |
1026 | if (group->meth->mul == 0) | |
1027 | /* use default */ | |
1028 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 1029 | |
0f113f3e MC |
1030 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
1031 | } | |
37c660ff BM |
1032 | |
1033 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
1034 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
1035 | { | |
1036 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 1037 | |
0f113f3e MC |
1038 | const EC_POINT *points[1]; |
1039 | const BIGNUM *scalars[1]; | |
37c660ff | 1040 | |
0f113f3e MC |
1041 | points[0] = point; |
1042 | scalars[0] = p_scalar; | |
37c660ff | 1043 | |
0f113f3e MC |
1044 | return EC_POINTs_mul(group, r, g_scalar, |
1045 | (point != NULL | |
1046 | && p_scalar != NULL), points, scalars, ctx); | |
1047 | } | |
37c660ff BM |
1048 | |
1049 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
1050 | { |
1051 | if (group->meth->mul == 0) | |
1052 | /* use default */ | |
1053 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 1054 | |
0f113f3e MC |
1055 | if (group->meth->precompute_mult != 0) |
1056 | return group->meth->precompute_mult(group, ctx); | |
1057 | else | |
1058 | return 1; /* nothing to do, so report success */ | |
1059 | } | |
37c660ff BM |
1060 | |
1061 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
1062 | { |
1063 | if (group->meth->mul == 0) | |
1064 | /* use default */ | |
1065 | return ec_wNAF_have_precompute_mult(group); | |
1066 | ||
1067 | if (group->meth->have_precompute_mult != 0) | |
1068 | return group->meth->have_precompute_mult(group); | |
1069 | else | |
1070 | return 0; /* cannot tell whether precomputation has | |
1071 | * been performed */ | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
1076 | * returns one on success. On error it returns zero. | |
1077 | */ | |
f54be179 | 1078 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
1079 | { |
1080 | BN_CTX *ctx = BN_CTX_new(); | |
1081 | int ret = 0; | |
1082 | ||
23a1d5e9 RS |
1083 | BN_MONT_CTX_free(group->mont_data); |
1084 | group->mont_data = NULL; | |
0f113f3e MC |
1085 | |
1086 | if (ctx == NULL) | |
1087 | goto err; | |
1088 | ||
1089 | group->mont_data = BN_MONT_CTX_new(); | |
1090 | if (!group->mont_data) | |
1091 | goto err; | |
1092 | ||
1093 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
1094 | BN_MONT_CTX_free(group->mont_data); | |
1095 | group->mont_data = NULL; | |
1096 | goto err; | |
1097 | } | |
1098 | ||
1099 | ret = 1; | |
1100 | ||
1101 | err: | |
1102 | ||
23a1d5e9 | 1103 | BN_CTX_free(ctx); |
0f113f3e MC |
1104 | return ret; |
1105 | } |