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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 | |
0657bf9c BM |
71 | /* functions for EC_GROUP objects */ |
72 | ||
73 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
0f113f3e MC |
74 | { |
75 | EC_GROUP *ret; | |
76 | ||
77 | if (meth == NULL) { | |
78 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); | |
79 | return NULL; | |
80 | } | |
81 | if (meth->group_init == 0) { | |
82 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
83 | return NULL; | |
84 | } | |
85 | ||
64b25758 | 86 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
87 | if (ret == NULL) { |
88 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | ret->meth = meth; | |
0f113f3e | 93 | ret->order = BN_new(); |
90945fa3 | 94 | if (ret->order == NULL) |
0f113f3e MC |
95 | goto err; |
96 | ret->cofactor = BN_new(); | |
90945fa3 | 97 | if (ret->cofactor == NULL) |
0f113f3e | 98 | goto err; |
86f300d3 | 99 | ret->asn1_flag = OPENSSL_EC_NAMED_CURVE; |
0f113f3e | 100 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
0f113f3e MC |
101 | if (!meth->group_init(ret)) |
102 | goto err; | |
0f113f3e | 103 | return ret; |
64b25758 | 104 | |
0f113f3e | 105 | err: |
23a1d5e9 RS |
106 | BN_free(ret->order); |
107 | BN_free(ret->cofactor); | |
0f113f3e MC |
108 | OPENSSL_free(ret); |
109 | return NULL; | |
110 | } | |
0657bf9c | 111 | |
0657bf9c | 112 | void EC_GROUP_free(EC_GROUP *group) |
0f113f3e MC |
113 | { |
114 | if (!group) | |
115 | return; | |
7711de24 | 116 | |
0f113f3e MC |
117 | if (group->meth->group_finish != 0) |
118 | group->meth->group_finish(group); | |
df9cc153 | 119 | |
0f113f3e | 120 | EC_EX_DATA_free_all_data(&group->extra_data); |
23a1d5e9 | 121 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 122 | EC_POINT_free(group->generator); |
0f113f3e MC |
123 | BN_free(group->order); |
124 | BN_free(group->cofactor); | |
25aaa98a | 125 | OPENSSL_free(group->seed); |
0f113f3e MC |
126 | OPENSSL_free(group); |
127 | } | |
0657bf9c BM |
128 | |
129 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
130 | { |
131 | if (!group) | |
132 | return; | |
df9cc153 | 133 | |
0f113f3e MC |
134 | if (group->meth->group_clear_finish != 0) |
135 | group->meth->group_clear_finish(group); | |
136 | else if (group->meth->group_finish != 0) | |
137 | group->meth->group_finish(group); | |
df9cc153 | 138 | |
0f113f3e | 139 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
f54be179 | 140 | |
23a1d5e9 | 141 | BN_MONT_CTX_free(group->mont_data); |
b6db386f | 142 | |
8fdc3734 | 143 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
144 | BN_clear_free(group->order); |
145 | BN_clear_free(group->cofactor); | |
4b45c6e5 | 146 | OPENSSL_clear_free(group->seed, group->seed_len); |
b4faea50 | 147 | OPENSSL_clear_free(group, sizeof(*group)); |
0f113f3e | 148 | } |
0657bf9c BM |
149 | |
150 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e MC |
151 | { |
152 | EC_EXTRA_DATA *d; | |
153 | ||
154 | if (dest->meth->group_copy == 0) { | |
155 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
156 | return 0; | |
157 | } | |
158 | if (dest->meth != src->meth) { | |
159 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
160 | return 0; | |
161 | } | |
162 | if (dest == src) | |
163 | return 1; | |
164 | ||
165 | EC_EX_DATA_free_all_data(&dest->extra_data); | |
166 | ||
167 | for (d = src->extra_data; d != NULL; d = d->next) { | |
168 | void *t = d->dup_func(d->data); | |
169 | ||
170 | if (t == NULL) | |
171 | return 0; | |
172 | if (!EC_EX_DATA_set_data | |
173 | (&dest->extra_data, t, d->dup_func, d->free_func, | |
174 | d->clear_free_func)) | |
175 | return 0; | |
176 | } | |
177 | ||
178 | if (src->mont_data != NULL) { | |
179 | if (dest->mont_data == NULL) { | |
180 | dest->mont_data = BN_MONT_CTX_new(); | |
181 | if (dest->mont_data == NULL) | |
182 | return 0; | |
183 | } | |
184 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
185 | return 0; | |
186 | } else { | |
187 | /* src->generator == NULL */ | |
23a1d5e9 RS |
188 | BN_MONT_CTX_free(dest->mont_data); |
189 | dest->mont_data = NULL; | |
0f113f3e | 190 | } |
0657bf9c | 191 | |
0f113f3e MC |
192 | if (src->generator != NULL) { |
193 | if (dest->generator == NULL) { | |
194 | dest->generator = EC_POINT_new(dest); | |
195 | if (dest->generator == NULL) | |
196 | return 0; | |
197 | } | |
198 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
199 | return 0; | |
200 | } else { | |
201 | /* src->generator == NULL */ | |
8fdc3734 RS |
202 | EC_POINT_clear_free(dest->generator); |
203 | dest->generator = NULL; | |
0f113f3e MC |
204 | } |
205 | ||
206 | if (!BN_copy(dest->order, src->order)) | |
207 | return 0; | |
208 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
209 | return 0; | |
210 | ||
211 | dest->curve_name = src->curve_name; | |
212 | dest->asn1_flag = src->asn1_flag; | |
213 | dest->asn1_form = src->asn1_form; | |
214 | ||
215 | if (src->seed) { | |
b548a1f1 | 216 | OPENSSL_free(dest->seed); |
0f113f3e MC |
217 | dest->seed = OPENSSL_malloc(src->seed_len); |
218 | if (dest->seed == NULL) | |
219 | return 0; | |
220 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
221 | return 0; | |
222 | dest->seed_len = src->seed_len; | |
223 | } else { | |
b548a1f1 | 224 | OPENSSL_free(dest->seed); |
0f113f3e MC |
225 | dest->seed = NULL; |
226 | dest->seed_len = 0; | |
227 | } | |
228 | ||
229 | return dest->meth->group_copy(dest, src); | |
230 | } | |
0657bf9c | 231 | |
7793f30e | 232 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
233 | { |
234 | EC_GROUP *t = NULL; | |
235 | int ok = 0; | |
7793f30e | 236 | |
0f113f3e MC |
237 | if (a == NULL) |
238 | return NULL; | |
7793f30e | 239 | |
0f113f3e MC |
240 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
241 | return (NULL); | |
242 | if (!EC_GROUP_copy(t, a)) | |
243 | goto err; | |
7793f30e | 244 | |
0f113f3e | 245 | ok = 1; |
7793f30e | 246 | |
0f113f3e MC |
247 | err: |
248 | if (!ok) { | |
8fdc3734 | 249 | EC_GROUP_free(t); |
0f113f3e | 250 | return NULL; |
8fdc3734 | 251 | } |
0f113f3e MC |
252 | return t; |
253 | } | |
7793f30e | 254 | |
48fe4d62 | 255 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
256 | { |
257 | return group->meth; | |
258 | } | |
48fe4d62 | 259 | |
458c2917 | 260 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
261 | { |
262 | return meth->field_type; | |
263 | } | |
264 | ||
265 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
266 | const BIGNUM *order, const BIGNUM *cofactor) | |
267 | { | |
268 | if (generator == NULL) { | |
269 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | if (group->generator == NULL) { | |
274 | group->generator = EC_POINT_new(group); | |
275 | if (group->generator == NULL) | |
276 | return 0; | |
277 | } | |
278 | if (!EC_POINT_copy(group->generator, generator)) | |
279 | return 0; | |
280 | ||
281 | if (order != NULL) { | |
282 | if (!BN_copy(group->order, order)) | |
283 | return 0; | |
284 | } else | |
285 | BN_zero(group->order); | |
286 | ||
287 | if (cofactor != NULL) { | |
288 | if (!BN_copy(group->cofactor, cofactor)) | |
289 | return 0; | |
290 | } else | |
291 | BN_zero(group->cofactor); | |
292 | ||
293 | /* | |
294 | * We ignore the return value because some groups have an order with | |
295 | * factors of two, which makes the Montgomery setup fail. | |
296 | * |group->mont_data| will be NULL in this case. | |
297 | */ | |
298 | ec_precompute_mont_data(group); | |
299 | ||
300 | return 1; | |
301 | } | |
bb62a8b0 | 302 | |
9dd84053 | 303 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
304 | { |
305 | return group->generator; | |
306 | } | |
bb62a8b0 | 307 | |
f54be179 | 308 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
309 | { |
310 | return group->mont_data; | |
311 | } | |
bb62a8b0 | 312 | |
b6db386f | 313 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
314 | { |
315 | if (!BN_copy(order, group->order)) | |
316 | return 0; | |
0657bf9c | 317 | |
0f113f3e MC |
318 | return !BN_is_zero(order); |
319 | } | |
0657bf9c | 320 | |
0f113f3e MC |
321 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
322 | BN_CTX *ctx) | |
323 | { | |
324 | if (!BN_copy(cofactor, group->cofactor)) | |
325 | return 0; | |
48fe4d62 | 326 | |
0f113f3e MC |
327 | return !BN_is_zero(group->cofactor); |
328 | } | |
48fe4d62 | 329 | |
7dc17a6c | 330 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
331 | { |
332 | group->curve_name = nid; | |
333 | } | |
b6db386f | 334 | |
7dc17a6c | 335 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
336 | { |
337 | return group->curve_name; | |
338 | } | |
b6db386f | 339 | |
458c2917 | 340 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
341 | { |
342 | group->asn1_flag = flag; | |
343 | } | |
458c2917 BM |
344 | |
345 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
346 | { |
347 | return group->asn1_flag; | |
348 | } | |
458c2917 | 349 | |
0f113f3e | 350 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 351 | point_conversion_form_t form) |
0f113f3e MC |
352 | { |
353 | group->asn1_form = form; | |
354 | } | |
254ef80d | 355 | |
0f113f3e MC |
356 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
357 | *group) | |
358 | { | |
359 | return group->asn1_form; | |
360 | } | |
254ef80d | 361 | |
5f3d6f70 | 362 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 363 | { |
b548a1f1 RS |
364 | OPENSSL_free(group->seed); |
365 | group->seed = NULL; | |
366 | group->seed_len = 0; | |
5f3d6f70 | 367 | |
0f113f3e MC |
368 | if (!len || !p) |
369 | return 1; | |
5f3d6f70 | 370 | |
0f113f3e MC |
371 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
372 | return 0; | |
373 | memcpy(group->seed, p, len); | |
374 | group->seed_len = len; | |
5f3d6f70 | 375 | |
0f113f3e MC |
376 | return len; |
377 | } | |
5f3d6f70 BM |
378 | |
379 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
380 | { |
381 | return group->seed; | |
382 | } | |
5f3d6f70 BM |
383 | |
384 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
385 | { |
386 | return group->seed_len; | |
387 | } | |
388 | ||
389 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
390 | const BIGNUM *b, BN_CTX *ctx) | |
391 | { | |
392 | if (group->meth->group_set_curve == 0) { | |
393 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
394 | return 0; | |
395 | } | |
396 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
397 | } | |
398 | ||
399 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
400 | BIGNUM *b, BN_CTX *ctx) | |
401 | { | |
402 | if (group->meth->group_get_curve == 0) { | |
403 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
404 | return 0; | |
405 | } | |
406 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
407 | } | |
7793f30e | 408 | |
b3310161 | 409 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
410 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
411 | const BIGNUM *b, BN_CTX *ctx) | |
412 | { | |
413 | if (group->meth->group_set_curve == 0) { | |
414 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
415 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
416 | return 0; | |
417 | } | |
418 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
419 | } | |
420 | ||
421 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
422 | BIGNUM *b, BN_CTX *ctx) | |
423 | { | |
424 | if (group->meth->group_get_curve == 0) { | |
425 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
426 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
427 | return 0; | |
428 | } | |
429 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
430 | } | |
b3310161 | 431 | #endif |
7793f30e BM |
432 | |
433 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
434 | { |
435 | if (group->meth->group_get_degree == 0) { | |
436 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
437 | return 0; | |
438 | } | |
439 | return group->meth->group_get_degree(group); | |
440 | } | |
48fe4d62 | 441 | |
17d6bb81 | 442 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
443 | { |
444 | if (group->meth->group_check_discriminant == 0) { | |
445 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
446 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
447 | return 0; | |
448 | } | |
449 | return group->meth->group_check_discriminant(group, ctx); | |
450 | } | |
af28dd6c | 451 | |
ada0e717 | 452 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
453 | { |
454 | int r = 0; | |
455 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
456 | BN_CTX *ctx_new = NULL; | |
457 | ||
458 | /* compare the field types */ | |
459 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
460 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
461 | return 1; | |
462 | /* compare the curve name (if present in both) */ | |
463 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
464 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
465 | return 1; | |
466 | ||
90945fa3 | 467 | if (ctx == NULL) |
0f113f3e | 468 | ctx_new = ctx = BN_CTX_new(); |
90945fa3 | 469 | if (ctx == NULL) |
0f113f3e MC |
470 | return -1; |
471 | ||
472 | BN_CTX_start(ctx); | |
473 | a1 = BN_CTX_get(ctx); | |
474 | a2 = BN_CTX_get(ctx); | |
475 | a3 = BN_CTX_get(ctx); | |
476 | b1 = BN_CTX_get(ctx); | |
477 | b2 = BN_CTX_get(ctx); | |
478 | b3 = BN_CTX_get(ctx); | |
90945fa3 | 479 | if (b3 == NULL) { |
0f113f3e | 480 | BN_CTX_end(ctx); |
23a1d5e9 | 481 | BN_CTX_free(ctx_new); |
0f113f3e MC |
482 | return -1; |
483 | } | |
484 | ||
485 | /* | |
486 | * XXX This approach assumes that the external representation of curves | |
487 | * over the same field type is the same. | |
488 | */ | |
489 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
490 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
491 | r = 1; | |
492 | ||
493 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
494 | r = 1; | |
495 | ||
496 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
497 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
498 | EC_GROUP_get0_generator(b), ctx)) | |
499 | r = 1; | |
500 | ||
501 | if (!r) { | |
502 | /* compare the order and cofactor */ | |
503 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
504 | !EC_GROUP_get_order(b, b1, ctx) || | |
505 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
506 | !EC_GROUP_get_cofactor(b, b2, ctx)) { | |
507 | BN_CTX_end(ctx); | |
23a1d5e9 | 508 | BN_CTX_free(ctx_new); |
0f113f3e MC |
509 | return -1; |
510 | } | |
511 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
512 | r = 1; | |
513 | } | |
514 | ||
515 | BN_CTX_end(ctx); | |
23a1d5e9 | 516 | BN_CTX_free(ctx_new); |
ada0e717 | 517 | |
0f113f3e MC |
518 | return r; |
519 | } | |
ada0e717 | 520 | |
df9cc153 | 521 | /* this has 'package' visibility */ |
9dd84053 | 522 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
0f113f3e MC |
523 | void *(*dup_func) (void *), |
524 | void (*free_func) (void *), | |
525 | void (*clear_free_func) (void *)) | |
526 | { | |
527 | EC_EXTRA_DATA *d; | |
528 | ||
529 | if (ex_data == NULL) | |
530 | return 0; | |
531 | ||
532 | for (d = *ex_data; d != NULL; d = d->next) { | |
533 | if (d->dup_func == dup_func && d->free_func == free_func | |
534 | && d->clear_free_func == clear_free_func) { | |
535 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); | |
536 | return 0; | |
537 | } | |
538 | } | |
df9cc153 | 539 | |
0f113f3e MC |
540 | if (data == NULL) |
541 | /* no explicit entry needed */ | |
542 | return 1; | |
ba729265 | 543 | |
b4faea50 | 544 | d = OPENSSL_malloc(sizeof(*d)); |
0f113f3e MC |
545 | if (d == NULL) |
546 | return 0; | |
ba729265 | 547 | |
0f113f3e MC |
548 | d->data = data; |
549 | d->dup_func = dup_func; | |
550 | d->free_func = free_func; | |
551 | d->clear_free_func = clear_free_func; | |
ba729265 | 552 | |
0f113f3e MC |
553 | d->next = *ex_data; |
554 | *ex_data = d; | |
ba729265 | 555 | |
0f113f3e MC |
556 | return 1; |
557 | } | |
df9cc153 | 558 | |
df9cc153 | 559 | /* this has 'package' visibility */ |
9dd84053 | 560 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
0f113f3e MC |
561 | void *(*dup_func) (void *), |
562 | void (*free_func) (void *), | |
563 | void (*clear_free_func) (void *)) | |
564 | { | |
565 | const EC_EXTRA_DATA *d; | |
566 | ||
567 | for (d = ex_data; d != NULL; d = d->next) { | |
568 | if (d->dup_func == dup_func && d->free_func == free_func | |
569 | && d->clear_free_func == clear_free_func) | |
570 | return d->data; | |
571 | } | |
572 | ||
573 | return NULL; | |
574 | } | |
df9cc153 | 575 | |
ba729265 | 576 | /* this has 'package' visibility */ |
9dd84053 | 577 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
578 | void *(*dup_func) (void *), |
579 | void (*free_func) (void *), | |
580 | void (*clear_free_func) (void *)) | |
581 | { | |
582 | EC_EXTRA_DATA **p; | |
583 | ||
584 | if (ex_data == NULL) | |
585 | return; | |
586 | ||
587 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
588 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
589 | && (*p)->clear_free_func == clear_free_func) { | |
590 | EC_EXTRA_DATA *next = (*p)->next; | |
591 | ||
592 | (*p)->free_func((*p)->data); | |
593 | OPENSSL_free(*p); | |
594 | ||
595 | *p = next; | |
596 | return; | |
597 | } | |
598 | } | |
599 | } | |
df9cc153 | 600 | |
ba729265 | 601 | /* this has 'package' visibility */ |
bbbd6710 | 602 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
603 | void *(*dup_func) (void *), |
604 | void (*free_func) (void *), | |
605 | void (*clear_free_func) (void *)) | |
606 | { | |
607 | EC_EXTRA_DATA **p; | |
608 | ||
609 | if (ex_data == NULL) | |
610 | return; | |
611 | ||
612 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
613 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
614 | && (*p)->clear_free_func == clear_free_func) { | |
615 | EC_EXTRA_DATA *next = (*p)->next; | |
616 | ||
617 | (*p)->clear_free_func((*p)->data); | |
618 | OPENSSL_free(*p); | |
619 | ||
620 | *p = next; | |
621 | return; | |
622 | } | |
623 | } | |
624 | } | |
df9cc153 BM |
625 | |
626 | /* this has 'package' visibility */ | |
9dd84053 | 627 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
628 | { |
629 | EC_EXTRA_DATA *d; | |
630 | ||
631 | if (ex_data == NULL) | |
632 | return; | |
633 | ||
634 | d = *ex_data; | |
635 | while (d) { | |
636 | EC_EXTRA_DATA *next = d->next; | |
637 | ||
638 | d->free_func(d->data); | |
639 | OPENSSL_free(d); | |
640 | ||
641 | d = next; | |
642 | } | |
643 | *ex_data = NULL; | |
644 | } | |
df9cc153 | 645 | |
df9cc153 | 646 | /* this has 'package' visibility */ |
9dd84053 | 647 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
648 | { |
649 | EC_EXTRA_DATA *d; | |
650 | ||
651 | if (ex_data == NULL) | |
652 | return; | |
653 | ||
654 | d = *ex_data; | |
655 | while (d) { | |
656 | EC_EXTRA_DATA *next = d->next; | |
657 | ||
658 | d->clear_free_func(d->data); | |
659 | OPENSSL_free(d); | |
df9cc153 | 660 | |
0f113f3e MC |
661 | d = next; |
662 | } | |
663 | *ex_data = NULL; | |
664 | } | |
0657bf9c BM |
665 | |
666 | /* functions for EC_POINT objects */ | |
667 | ||
668 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
669 | { |
670 | EC_POINT *ret; | |
671 | ||
672 | if (group == NULL) { | |
673 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
674 | return NULL; | |
675 | } | |
676 | if (group->meth->point_init == 0) { | |
677 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
678 | return NULL; | |
679 | } | |
680 | ||
b4faea50 | 681 | ret = OPENSSL_malloc(sizeof(*ret)); |
0f113f3e MC |
682 | if (ret == NULL) { |
683 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
684 | return NULL; | |
685 | } | |
686 | ||
687 | ret->meth = group->meth; | |
688 | ||
689 | if (!ret->meth->point_init(ret)) { | |
690 | OPENSSL_free(ret); | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | return ret; | |
695 | } | |
0657bf9c BM |
696 | |
697 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
698 | { |
699 | if (!point) | |
700 | return; | |
7711de24 | 701 | |
0f113f3e MC |
702 | if (point->meth->point_finish != 0) |
703 | point->meth->point_finish(point); | |
704 | OPENSSL_free(point); | |
705 | } | |
0657bf9c BM |
706 | |
707 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
708 | { |
709 | if (!point) | |
710 | return; | |
711 | ||
712 | if (point->meth->point_clear_finish != 0) | |
713 | point->meth->point_clear_finish(point); | |
714 | else if (point->meth->point_finish != 0) | |
715 | point->meth->point_finish(point); | |
b4faea50 | 716 | OPENSSL_clear_free(point, sizeof(*point)); |
0f113f3e | 717 | } |
0657bf9c BM |
718 | |
719 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
720 | { |
721 | if (dest->meth->point_copy == 0) { | |
722 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
723 | return 0; | |
724 | } | |
725 | if (dest->meth != src->meth) { | |
726 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
727 | return 0; | |
728 | } | |
729 | if (dest == src) | |
730 | return 1; | |
731 | return dest->meth->point_copy(dest, src); | |
732 | } | |
0657bf9c | 733 | |
7793f30e | 734 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
735 | { |
736 | EC_POINT *t; | |
737 | int r; | |
738 | ||
739 | if (a == NULL) | |
740 | return NULL; | |
741 | ||
742 | t = EC_POINT_new(group); | |
743 | if (t == NULL) | |
744 | return (NULL); | |
745 | r = EC_POINT_copy(t, a); | |
746 | if (!r) { | |
747 | EC_POINT_free(t); | |
748 | return NULL; | |
8fdc3734 RS |
749 | } |
750 | return t; | |
0f113f3e | 751 | } |
7793f30e | 752 | |
48fe4d62 | 753 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
754 | { |
755 | return point->meth; | |
756 | } | |
48fe4d62 | 757 | |
226cc7de | 758 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
759 | { |
760 | if (group->meth->point_set_to_infinity == 0) { | |
761 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
762 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
763 | return 0; | |
764 | } | |
765 | if (group->meth != point->meth) { | |
766 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
767 | return 0; | |
768 | } | |
769 | return group->meth->point_set_to_infinity(group, point); | |
770 | } | |
771 | ||
772 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
773 | EC_POINT *point, const BIGNUM *x, | |
774 | const BIGNUM *y, const BIGNUM *z, | |
775 | BN_CTX *ctx) | |
776 | { | |
777 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
778 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
779 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
780 | return 0; | |
781 | } | |
782 | if (group->meth != point->meth) { | |
783 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
784 | EC_R_INCOMPATIBLE_OBJECTS); | |
785 | return 0; | |
786 | } | |
787 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
788 | y, z, ctx); | |
789 | } | |
790 | ||
791 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
792 | const EC_POINT *point, BIGNUM *x, | |
793 | BIGNUM *y, BIGNUM *z, | |
794 | BN_CTX *ctx) | |
795 | { | |
796 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
797 | ECerr(EC_F_EC_POINT_GET_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_GET_JPROJECTIVE_COORDINATES_GFP, | |
803 | EC_R_INCOMPATIBLE_OBJECTS); | |
804 | return 0; | |
805 | } | |
806 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
807 | y, z, ctx); | |
808 | } | |
809 | ||
810 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
811 | EC_POINT *point, const BIGNUM *x, | |
812 | const BIGNUM *y, BN_CTX *ctx) | |
813 | { | |
814 | if (group->meth->point_set_affine_coordinates == 0) { | |
815 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
816 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
817 | return 0; | |
818 | } | |
819 | if (group->meth != point->meth) { | |
820 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
821 | EC_R_INCOMPATIBLE_OBJECTS); | |
822 | return 0; | |
823 | } | |
824 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
825 | } | |
226cc7de | 826 | |
b3310161 | 827 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
828 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
829 | EC_POINT *point, const BIGNUM *x, | |
830 | const BIGNUM *y, BN_CTX *ctx) | |
831 | { | |
832 | if (group->meth->point_set_affine_coordinates == 0) { | |
833 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
834 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
835 | return 0; | |
836 | } | |
837 | if (group->meth != point->meth) { | |
838 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
839 | EC_R_INCOMPATIBLE_OBJECTS); | |
840 | return 0; | |
841 | } | |
842 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
843 | } | |
b3310161 | 844 | #endif |
7793f30e | 845 | |
0f113f3e MC |
846 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
847 | const EC_POINT *point, BIGNUM *x, | |
848 | BIGNUM *y, BN_CTX *ctx) | |
849 | { | |
850 | if (group->meth->point_get_affine_coordinates == 0) { | |
851 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
852 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
853 | return 0; | |
854 | } | |
855 | if (group->meth != point->meth) { | |
856 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
857 | EC_R_INCOMPATIBLE_OBJECTS); | |
858 | return 0; | |
859 | } | |
860 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
861 | } | |
7793f30e | 862 | |
b3310161 | 863 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
864 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
865 | const EC_POINT *point, BIGNUM *x, | |
866 | BIGNUM *y, BN_CTX *ctx) | |
867 | { | |
868 | if (group->meth->point_get_affine_coordinates == 0) { | |
869 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
870 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
871 | return 0; | |
872 | } | |
873 | if (group->meth != point->meth) { | |
874 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
875 | EC_R_INCOMPATIBLE_OBJECTS); | |
876 | return 0; | |
877 | } | |
878 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
879 | } | |
b3310161 | 880 | #endif |
7793f30e | 881 | |
0f113f3e MC |
882 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
883 | const EC_POINT *b, BN_CTX *ctx) | |
884 | { | |
885 | if (group->meth->add == 0) { | |
886 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
887 | return 0; | |
888 | } | |
889 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
890 | || (a->meth != b->meth)) { | |
891 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
892 | return 0; | |
893 | } | |
894 | return group->meth->add(group, r, a, b, ctx); | |
895 | } | |
896 | ||
897 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
898 | BN_CTX *ctx) | |
899 | { | |
900 | if (group->meth->dbl == 0) { | |
901 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
902 | return 0; | |
903 | } | |
904 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
905 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
906 | return 0; | |
907 | } | |
908 | return group->meth->dbl(group, r, a, ctx); | |
909 | } | |
0657bf9c | 910 | |
1d5bd6cf | 911 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
912 | { |
913 | if (group->meth->invert == 0) { | |
914 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
915 | return 0; | |
916 | } | |
917 | if (group->meth != a->meth) { | |
918 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
919 | return 0; | |
920 | } | |
921 | return group->meth->invert(group, a, ctx); | |
922 | } | |
1d5bd6cf | 923 | |
0657bf9c | 924 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
925 | { |
926 | if (group->meth->is_at_infinity == 0) { | |
927 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
928 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
929 | return 0; | |
930 | } | |
931 | if (group->meth != point->meth) { | |
932 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
933 | return 0; | |
934 | } | |
935 | return group->meth->is_at_infinity(group, point); | |
936 | } | |
937 | ||
68886be7 MC |
938 | /* |
939 | * Check whether an EC_POINT is on the curve or not. Note that the return | |
940 | * value for this function should NOT be treated as a boolean. Return values: | |
941 | * 1: The point is on the curve | |
942 | * 0: The point is not on the curve | |
943 | * -1: An error occurred | |
944 | */ | |
0f113f3e MC |
945 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
946 | BN_CTX *ctx) | |
947 | { | |
948 | if (group->meth->is_on_curve == 0) { | |
949 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
950 | return 0; | |
951 | } | |
952 | if (group->meth != point->meth) { | |
953 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
954 | return 0; | |
955 | } | |
956 | return group->meth->is_on_curve(group, point, ctx); | |
957 | } | |
958 | ||
959 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
960 | BN_CTX *ctx) | |
961 | { | |
962 | if (group->meth->point_cmp == 0) { | |
963 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
964 | return -1; | |
965 | } | |
966 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
967 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
968 | return -1; | |
969 | } | |
970 | return group->meth->point_cmp(group, a, b, ctx); | |
971 | } | |
1d5bd6cf | 972 | |
e869d4bd | 973 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
974 | { |
975 | if (group->meth->make_affine == 0) { | |
976 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
977 | return 0; | |
978 | } | |
979 | if (group->meth != point->meth) { | |
980 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
981 | return 0; | |
982 | } | |
983 | return group->meth->make_affine(group, point, ctx); | |
984 | } | |
985 | ||
986 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
987 | EC_POINT *points[], BN_CTX *ctx) | |
988 | { | |
989 | size_t i; | |
990 | ||
991 | if (group->meth->points_make_affine == 0) { | |
992 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
993 | return 0; | |
994 | } | |
995 | for (i = 0; i < num; i++) { | |
996 | if (group->meth != points[i]->meth) { | |
997 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
998 | return 0; | |
999 | } | |
1000 | } | |
1001 | return group->meth->points_make_affine(group, num, points, ctx); | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
1006 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
1007 | * methods. | |
37c660ff BM |
1008 | */ |
1009 | ||
1010 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
1011 | size_t num, const EC_POINT *points[], |
1012 | const BIGNUM *scalars[], BN_CTX *ctx) | |
1013 | { | |
1014 | if (group->meth->mul == 0) | |
1015 | /* use default */ | |
1016 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 1017 | |
0f113f3e MC |
1018 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
1019 | } | |
37c660ff BM |
1020 | |
1021 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
1022 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
1023 | { | |
1024 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 1025 | |
0f113f3e MC |
1026 | const EC_POINT *points[1]; |
1027 | const BIGNUM *scalars[1]; | |
37c660ff | 1028 | |
0f113f3e MC |
1029 | points[0] = point; |
1030 | scalars[0] = p_scalar; | |
37c660ff | 1031 | |
0f113f3e MC |
1032 | return EC_POINTs_mul(group, r, g_scalar, |
1033 | (point != NULL | |
1034 | && p_scalar != NULL), points, scalars, ctx); | |
1035 | } | |
37c660ff BM |
1036 | |
1037 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
1038 | { |
1039 | if (group->meth->mul == 0) | |
1040 | /* use default */ | |
1041 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 1042 | |
0f113f3e MC |
1043 | if (group->meth->precompute_mult != 0) |
1044 | return group->meth->precompute_mult(group, ctx); | |
1045 | else | |
1046 | return 1; /* nothing to do, so report success */ | |
1047 | } | |
37c660ff BM |
1048 | |
1049 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
1050 | { |
1051 | if (group->meth->mul == 0) | |
1052 | /* use default */ | |
1053 | return ec_wNAF_have_precompute_mult(group); | |
1054 | ||
1055 | if (group->meth->have_precompute_mult != 0) | |
1056 | return group->meth->have_precompute_mult(group); | |
1057 | else | |
1058 | return 0; /* cannot tell whether precomputation has | |
1059 | * been performed */ | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
1064 | * returns one on success. On error it returns zero. | |
1065 | */ | |
f54be179 | 1066 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
1067 | { |
1068 | BN_CTX *ctx = BN_CTX_new(); | |
1069 | int ret = 0; | |
1070 | ||
23a1d5e9 RS |
1071 | BN_MONT_CTX_free(group->mont_data); |
1072 | group->mont_data = NULL; | |
0f113f3e MC |
1073 | |
1074 | if (ctx == NULL) | |
1075 | goto err; | |
1076 | ||
1077 | group->mont_data = BN_MONT_CTX_new(); | |
90945fa3 | 1078 | if (group->mont_data == NULL) |
0f113f3e MC |
1079 | goto err; |
1080 | ||
1081 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
1082 | BN_MONT_CTX_free(group->mont_data); | |
1083 | group->mont_data = NULL; | |
1084 | goto err; | |
1085 | } | |
1086 | ||
1087 | ret = 1; | |
1088 | ||
1089 | err: | |
1090 | ||
23a1d5e9 | 1091 | BN_CTX_free(ctx); |
0f113f3e MC |
1092 | return ret; |
1093 | } |