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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 | ||
b4faea50 | 88 | ret = OPENSSL_malloc(sizeof(*ret)); |
0f113f3e MC |
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); |
23a1d5e9 | 135 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 136 | EC_POINT_free(group->generator); |
0f113f3e MC |
137 | BN_free(group->order); |
138 | BN_free(group->cofactor); | |
25aaa98a | 139 | OPENSSL_free(group->seed); |
0f113f3e MC |
140 | OPENSSL_free(group); |
141 | } | |
0657bf9c BM |
142 | |
143 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
144 | { |
145 | if (!group) | |
146 | return; | |
df9cc153 | 147 | |
0f113f3e MC |
148 | if (group->meth->group_clear_finish != 0) |
149 | group->meth->group_clear_finish(group); | |
150 | else if (group->meth->group_finish != 0) | |
151 | group->meth->group_finish(group); | |
df9cc153 | 152 | |
0f113f3e | 153 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
f54be179 | 154 | |
23a1d5e9 | 155 | BN_MONT_CTX_free(group->mont_data); |
b6db386f | 156 | |
8fdc3734 | 157 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
158 | BN_clear_free(group->order); |
159 | BN_clear_free(group->cofactor); | |
4b45c6e5 | 160 | OPENSSL_clear_free(group->seed, group->seed_len); |
b4faea50 | 161 | OPENSSL_clear_free(group, sizeof(*group)); |
0f113f3e | 162 | } |
0657bf9c BM |
163 | |
164 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e MC |
165 | { |
166 | EC_EXTRA_DATA *d; | |
167 | ||
168 | if (dest->meth->group_copy == 0) { | |
169 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
170 | return 0; | |
171 | } | |
172 | if (dest->meth != src->meth) { | |
173 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
174 | return 0; | |
175 | } | |
176 | if (dest == src) | |
177 | return 1; | |
178 | ||
179 | EC_EX_DATA_free_all_data(&dest->extra_data); | |
180 | ||
181 | for (d = src->extra_data; d != NULL; d = d->next) { | |
182 | void *t = d->dup_func(d->data); | |
183 | ||
184 | if (t == NULL) | |
185 | return 0; | |
186 | if (!EC_EX_DATA_set_data | |
187 | (&dest->extra_data, t, d->dup_func, d->free_func, | |
188 | d->clear_free_func)) | |
189 | return 0; | |
190 | } | |
191 | ||
192 | if (src->mont_data != NULL) { | |
193 | if (dest->mont_data == NULL) { | |
194 | dest->mont_data = BN_MONT_CTX_new(); | |
195 | if (dest->mont_data == NULL) | |
196 | return 0; | |
197 | } | |
198 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
199 | return 0; | |
200 | } else { | |
201 | /* src->generator == NULL */ | |
23a1d5e9 RS |
202 | BN_MONT_CTX_free(dest->mont_data); |
203 | dest->mont_data = NULL; | |
0f113f3e | 204 | } |
0657bf9c | 205 | |
0f113f3e MC |
206 | if (src->generator != NULL) { |
207 | if (dest->generator == NULL) { | |
208 | dest->generator = EC_POINT_new(dest); | |
209 | if (dest->generator == NULL) | |
210 | return 0; | |
211 | } | |
212 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
213 | return 0; | |
214 | } else { | |
215 | /* src->generator == NULL */ | |
8fdc3734 RS |
216 | EC_POINT_clear_free(dest->generator); |
217 | dest->generator = NULL; | |
0f113f3e MC |
218 | } |
219 | ||
220 | if (!BN_copy(dest->order, src->order)) | |
221 | return 0; | |
222 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
223 | return 0; | |
224 | ||
225 | dest->curve_name = src->curve_name; | |
226 | dest->asn1_flag = src->asn1_flag; | |
227 | dest->asn1_form = src->asn1_form; | |
228 | ||
229 | if (src->seed) { | |
b548a1f1 | 230 | OPENSSL_free(dest->seed); |
0f113f3e MC |
231 | dest->seed = OPENSSL_malloc(src->seed_len); |
232 | if (dest->seed == NULL) | |
233 | return 0; | |
234 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
235 | return 0; | |
236 | dest->seed_len = src->seed_len; | |
237 | } else { | |
b548a1f1 | 238 | OPENSSL_free(dest->seed); |
0f113f3e MC |
239 | dest->seed = NULL; |
240 | dest->seed_len = 0; | |
241 | } | |
242 | ||
243 | return dest->meth->group_copy(dest, src); | |
244 | } | |
0657bf9c | 245 | |
7793f30e | 246 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
247 | { |
248 | EC_GROUP *t = NULL; | |
249 | int ok = 0; | |
7793f30e | 250 | |
0f113f3e MC |
251 | if (a == NULL) |
252 | return NULL; | |
7793f30e | 253 | |
0f113f3e MC |
254 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
255 | return (NULL); | |
256 | if (!EC_GROUP_copy(t, a)) | |
257 | goto err; | |
7793f30e | 258 | |
0f113f3e | 259 | ok = 1; |
7793f30e | 260 | |
0f113f3e MC |
261 | err: |
262 | if (!ok) { | |
8fdc3734 | 263 | EC_GROUP_free(t); |
0f113f3e | 264 | return NULL; |
8fdc3734 | 265 | } |
0f113f3e MC |
266 | return t; |
267 | } | |
7793f30e | 268 | |
48fe4d62 | 269 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
270 | { |
271 | return group->meth; | |
272 | } | |
48fe4d62 | 273 | |
458c2917 | 274 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
275 | { |
276 | return meth->field_type; | |
277 | } | |
278 | ||
279 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
280 | const BIGNUM *order, const BIGNUM *cofactor) | |
281 | { | |
282 | if (generator == NULL) { | |
283 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | if (group->generator == NULL) { | |
288 | group->generator = EC_POINT_new(group); | |
289 | if (group->generator == NULL) | |
290 | return 0; | |
291 | } | |
292 | if (!EC_POINT_copy(group->generator, generator)) | |
293 | return 0; | |
294 | ||
295 | if (order != NULL) { | |
296 | if (!BN_copy(group->order, order)) | |
297 | return 0; | |
298 | } else | |
299 | BN_zero(group->order); | |
300 | ||
301 | if (cofactor != NULL) { | |
302 | if (!BN_copy(group->cofactor, cofactor)) | |
303 | return 0; | |
304 | } else | |
305 | BN_zero(group->cofactor); | |
306 | ||
307 | /* | |
308 | * We ignore the return value because some groups have an order with | |
309 | * factors of two, which makes the Montgomery setup fail. | |
310 | * |group->mont_data| will be NULL in this case. | |
311 | */ | |
312 | ec_precompute_mont_data(group); | |
313 | ||
314 | return 1; | |
315 | } | |
bb62a8b0 | 316 | |
9dd84053 | 317 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
318 | { |
319 | return group->generator; | |
320 | } | |
bb62a8b0 | 321 | |
f54be179 | 322 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
323 | { |
324 | return group->mont_data; | |
325 | } | |
bb62a8b0 | 326 | |
b6db386f | 327 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
328 | { |
329 | if (!BN_copy(order, group->order)) | |
330 | return 0; | |
0657bf9c | 331 | |
0f113f3e MC |
332 | return !BN_is_zero(order); |
333 | } | |
0657bf9c | 334 | |
0f113f3e MC |
335 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
336 | BN_CTX *ctx) | |
337 | { | |
338 | if (!BN_copy(cofactor, group->cofactor)) | |
339 | return 0; | |
48fe4d62 | 340 | |
0f113f3e MC |
341 | return !BN_is_zero(group->cofactor); |
342 | } | |
48fe4d62 | 343 | |
7dc17a6c | 344 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
345 | { |
346 | group->curve_name = nid; | |
347 | } | |
b6db386f | 348 | |
7dc17a6c | 349 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
350 | { |
351 | return group->curve_name; | |
352 | } | |
b6db386f | 353 | |
458c2917 | 354 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
355 | { |
356 | group->asn1_flag = flag; | |
357 | } | |
458c2917 BM |
358 | |
359 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
360 | { |
361 | return group->asn1_flag; | |
362 | } | |
458c2917 | 363 | |
0f113f3e | 364 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 365 | point_conversion_form_t form) |
0f113f3e MC |
366 | { |
367 | group->asn1_form = form; | |
368 | } | |
254ef80d | 369 | |
0f113f3e MC |
370 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
371 | *group) | |
372 | { | |
373 | return group->asn1_form; | |
374 | } | |
254ef80d | 375 | |
5f3d6f70 | 376 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 377 | { |
b548a1f1 RS |
378 | OPENSSL_free(group->seed); |
379 | group->seed = NULL; | |
380 | group->seed_len = 0; | |
5f3d6f70 | 381 | |
0f113f3e MC |
382 | if (!len || !p) |
383 | return 1; | |
5f3d6f70 | 384 | |
0f113f3e MC |
385 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
386 | return 0; | |
387 | memcpy(group->seed, p, len); | |
388 | group->seed_len = len; | |
5f3d6f70 | 389 | |
0f113f3e MC |
390 | return len; |
391 | } | |
5f3d6f70 BM |
392 | |
393 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
394 | { |
395 | return group->seed; | |
396 | } | |
5f3d6f70 BM |
397 | |
398 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
399 | { |
400 | return group->seed_len; | |
401 | } | |
402 | ||
403 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
404 | const BIGNUM *b, BN_CTX *ctx) | |
405 | { | |
406 | if (group->meth->group_set_curve == 0) { | |
407 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
408 | return 0; | |
409 | } | |
410 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
411 | } | |
412 | ||
413 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
414 | BIGNUM *b, BN_CTX *ctx) | |
415 | { | |
416 | if (group->meth->group_get_curve == 0) { | |
417 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
418 | return 0; | |
419 | } | |
420 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
421 | } | |
7793f30e | 422 | |
b3310161 | 423 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
424 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
425 | const BIGNUM *b, BN_CTX *ctx) | |
426 | { | |
427 | if (group->meth->group_set_curve == 0) { | |
428 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
429 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
430 | return 0; | |
431 | } | |
432 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
433 | } | |
434 | ||
435 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
436 | BIGNUM *b, BN_CTX *ctx) | |
437 | { | |
438 | if (group->meth->group_get_curve == 0) { | |
439 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
440 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
441 | return 0; | |
442 | } | |
443 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
444 | } | |
b3310161 | 445 | #endif |
7793f30e BM |
446 | |
447 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
448 | { |
449 | if (group->meth->group_get_degree == 0) { | |
450 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
451 | return 0; | |
452 | } | |
453 | return group->meth->group_get_degree(group); | |
454 | } | |
48fe4d62 | 455 | |
17d6bb81 | 456 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
457 | { |
458 | if (group->meth->group_check_discriminant == 0) { | |
459 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
460 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
461 | return 0; | |
462 | } | |
463 | return group->meth->group_check_discriminant(group, ctx); | |
464 | } | |
af28dd6c | 465 | |
ada0e717 | 466 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
467 | { |
468 | int r = 0; | |
469 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
470 | BN_CTX *ctx_new = NULL; | |
471 | ||
472 | /* compare the field types */ | |
473 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
474 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
475 | return 1; | |
476 | /* compare the curve name (if present in both) */ | |
477 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
478 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
479 | return 1; | |
480 | ||
481 | if (!ctx) | |
482 | ctx_new = ctx = BN_CTX_new(); | |
483 | if (!ctx) | |
484 | return -1; | |
485 | ||
486 | BN_CTX_start(ctx); | |
487 | a1 = BN_CTX_get(ctx); | |
488 | a2 = BN_CTX_get(ctx); | |
489 | a3 = BN_CTX_get(ctx); | |
490 | b1 = BN_CTX_get(ctx); | |
491 | b2 = BN_CTX_get(ctx); | |
492 | b3 = BN_CTX_get(ctx); | |
493 | if (!b3) { | |
494 | BN_CTX_end(ctx); | |
23a1d5e9 | 495 | BN_CTX_free(ctx_new); |
0f113f3e MC |
496 | return -1; |
497 | } | |
498 | ||
499 | /* | |
500 | * XXX This approach assumes that the external representation of curves | |
501 | * over the same field type is the same. | |
502 | */ | |
503 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
504 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
505 | r = 1; | |
506 | ||
507 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
508 | r = 1; | |
509 | ||
510 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
511 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
512 | EC_GROUP_get0_generator(b), ctx)) | |
513 | r = 1; | |
514 | ||
515 | if (!r) { | |
516 | /* compare the order and cofactor */ | |
517 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
518 | !EC_GROUP_get_order(b, b1, ctx) || | |
519 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
520 | !EC_GROUP_get_cofactor(b, b2, ctx)) { | |
521 | BN_CTX_end(ctx); | |
23a1d5e9 | 522 | BN_CTX_free(ctx_new); |
0f113f3e MC |
523 | return -1; |
524 | } | |
525 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
526 | r = 1; | |
527 | } | |
528 | ||
529 | BN_CTX_end(ctx); | |
23a1d5e9 | 530 | BN_CTX_free(ctx_new); |
ada0e717 | 531 | |
0f113f3e MC |
532 | return r; |
533 | } | |
ada0e717 | 534 | |
df9cc153 | 535 | /* this has 'package' visibility */ |
9dd84053 | 536 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
0f113f3e MC |
537 | void *(*dup_func) (void *), |
538 | void (*free_func) (void *), | |
539 | void (*clear_free_func) (void *)) | |
540 | { | |
541 | EC_EXTRA_DATA *d; | |
542 | ||
543 | if (ex_data == NULL) | |
544 | return 0; | |
545 | ||
546 | for (d = *ex_data; d != NULL; d = d->next) { | |
547 | if (d->dup_func == dup_func && d->free_func == free_func | |
548 | && d->clear_free_func == clear_free_func) { | |
549 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); | |
550 | return 0; | |
551 | } | |
552 | } | |
df9cc153 | 553 | |
0f113f3e MC |
554 | if (data == NULL) |
555 | /* no explicit entry needed */ | |
556 | return 1; | |
ba729265 | 557 | |
b4faea50 | 558 | d = OPENSSL_malloc(sizeof(*d)); |
0f113f3e MC |
559 | if (d == NULL) |
560 | return 0; | |
ba729265 | 561 | |
0f113f3e MC |
562 | d->data = data; |
563 | d->dup_func = dup_func; | |
564 | d->free_func = free_func; | |
565 | d->clear_free_func = clear_free_func; | |
ba729265 | 566 | |
0f113f3e MC |
567 | d->next = *ex_data; |
568 | *ex_data = d; | |
ba729265 | 569 | |
0f113f3e MC |
570 | return 1; |
571 | } | |
df9cc153 | 572 | |
df9cc153 | 573 | /* this has 'package' visibility */ |
9dd84053 | 574 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
0f113f3e MC |
575 | void *(*dup_func) (void *), |
576 | void (*free_func) (void *), | |
577 | void (*clear_free_func) (void *)) | |
578 | { | |
579 | const EC_EXTRA_DATA *d; | |
580 | ||
581 | for (d = ex_data; d != NULL; d = d->next) { | |
582 | if (d->dup_func == dup_func && d->free_func == free_func | |
583 | && d->clear_free_func == clear_free_func) | |
584 | return d->data; | |
585 | } | |
586 | ||
587 | return NULL; | |
588 | } | |
df9cc153 | 589 | |
ba729265 | 590 | /* this has 'package' visibility */ |
9dd84053 | 591 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
592 | void *(*dup_func) (void *), |
593 | void (*free_func) (void *), | |
594 | void (*clear_free_func) (void *)) | |
595 | { | |
596 | EC_EXTRA_DATA **p; | |
597 | ||
598 | if (ex_data == NULL) | |
599 | return; | |
600 | ||
601 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
602 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
603 | && (*p)->clear_free_func == clear_free_func) { | |
604 | EC_EXTRA_DATA *next = (*p)->next; | |
605 | ||
606 | (*p)->free_func((*p)->data); | |
607 | OPENSSL_free(*p); | |
608 | ||
609 | *p = next; | |
610 | return; | |
611 | } | |
612 | } | |
613 | } | |
df9cc153 | 614 | |
ba729265 | 615 | /* this has 'package' visibility */ |
bbbd6710 | 616 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
0f113f3e MC |
617 | void *(*dup_func) (void *), |
618 | void (*free_func) (void *), | |
619 | void (*clear_free_func) (void *)) | |
620 | { | |
621 | EC_EXTRA_DATA **p; | |
622 | ||
623 | if (ex_data == NULL) | |
624 | return; | |
625 | ||
626 | for (p = ex_data; *p != NULL; p = &((*p)->next)) { | |
627 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func | |
628 | && (*p)->clear_free_func == clear_free_func) { | |
629 | EC_EXTRA_DATA *next = (*p)->next; | |
630 | ||
631 | (*p)->clear_free_func((*p)->data); | |
632 | OPENSSL_free(*p); | |
633 | ||
634 | *p = next; | |
635 | return; | |
636 | } | |
637 | } | |
638 | } | |
df9cc153 BM |
639 | |
640 | /* this has 'package' visibility */ | |
9dd84053 | 641 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
642 | { |
643 | EC_EXTRA_DATA *d; | |
644 | ||
645 | if (ex_data == NULL) | |
646 | return; | |
647 | ||
648 | d = *ex_data; | |
649 | while (d) { | |
650 | EC_EXTRA_DATA *next = d->next; | |
651 | ||
652 | d->free_func(d->data); | |
653 | OPENSSL_free(d); | |
654 | ||
655 | d = next; | |
656 | } | |
657 | *ex_data = NULL; | |
658 | } | |
df9cc153 | 659 | |
df9cc153 | 660 | /* this has 'package' visibility */ |
9dd84053 | 661 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
0f113f3e MC |
662 | { |
663 | EC_EXTRA_DATA *d; | |
664 | ||
665 | if (ex_data == NULL) | |
666 | return; | |
667 | ||
668 | d = *ex_data; | |
669 | while (d) { | |
670 | EC_EXTRA_DATA *next = d->next; | |
671 | ||
672 | d->clear_free_func(d->data); | |
673 | OPENSSL_free(d); | |
df9cc153 | 674 | |
0f113f3e MC |
675 | d = next; |
676 | } | |
677 | *ex_data = NULL; | |
678 | } | |
0657bf9c BM |
679 | |
680 | /* functions for EC_POINT objects */ | |
681 | ||
682 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
683 | { |
684 | EC_POINT *ret; | |
685 | ||
686 | if (group == NULL) { | |
687 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
688 | return NULL; | |
689 | } | |
690 | if (group->meth->point_init == 0) { | |
691 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
692 | return NULL; | |
693 | } | |
694 | ||
b4faea50 | 695 | ret = OPENSSL_malloc(sizeof(*ret)); |
0f113f3e MC |
696 | if (ret == NULL) { |
697 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
698 | return NULL; | |
699 | } | |
700 | ||
701 | ret->meth = group->meth; | |
702 | ||
703 | if (!ret->meth->point_init(ret)) { | |
704 | OPENSSL_free(ret); | |
705 | return NULL; | |
706 | } | |
707 | ||
708 | return ret; | |
709 | } | |
0657bf9c BM |
710 | |
711 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
712 | { |
713 | if (!point) | |
714 | return; | |
7711de24 | 715 | |
0f113f3e MC |
716 | if (point->meth->point_finish != 0) |
717 | point->meth->point_finish(point); | |
718 | OPENSSL_free(point); | |
719 | } | |
0657bf9c BM |
720 | |
721 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
722 | { |
723 | if (!point) | |
724 | return; | |
725 | ||
726 | if (point->meth->point_clear_finish != 0) | |
727 | point->meth->point_clear_finish(point); | |
728 | else if (point->meth->point_finish != 0) | |
729 | point->meth->point_finish(point); | |
b4faea50 | 730 | OPENSSL_clear_free(point, sizeof(*point)); |
0f113f3e | 731 | } |
0657bf9c BM |
732 | |
733 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
734 | { |
735 | if (dest->meth->point_copy == 0) { | |
736 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
737 | return 0; | |
738 | } | |
739 | if (dest->meth != src->meth) { | |
740 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
741 | return 0; | |
742 | } | |
743 | if (dest == src) | |
744 | return 1; | |
745 | return dest->meth->point_copy(dest, src); | |
746 | } | |
0657bf9c | 747 | |
7793f30e | 748 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
749 | { |
750 | EC_POINT *t; | |
751 | int r; | |
752 | ||
753 | if (a == NULL) | |
754 | return NULL; | |
755 | ||
756 | t = EC_POINT_new(group); | |
757 | if (t == NULL) | |
758 | return (NULL); | |
759 | r = EC_POINT_copy(t, a); | |
760 | if (!r) { | |
761 | EC_POINT_free(t); | |
762 | return NULL; | |
8fdc3734 RS |
763 | } |
764 | return t; | |
0f113f3e | 765 | } |
7793f30e | 766 | |
48fe4d62 | 767 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
768 | { |
769 | return point->meth; | |
770 | } | |
48fe4d62 | 771 | |
226cc7de | 772 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
773 | { |
774 | if (group->meth->point_set_to_infinity == 0) { | |
775 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
776 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
777 | return 0; | |
778 | } | |
779 | if (group->meth != point->meth) { | |
780 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
781 | return 0; | |
782 | } | |
783 | return group->meth->point_set_to_infinity(group, point); | |
784 | } | |
785 | ||
786 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
787 | EC_POINT *point, const BIGNUM *x, | |
788 | const BIGNUM *y, const BIGNUM *z, | |
789 | BN_CTX *ctx) | |
790 | { | |
791 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
792 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
793 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
794 | return 0; | |
795 | } | |
796 | if (group->meth != point->meth) { | |
797 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
798 | EC_R_INCOMPATIBLE_OBJECTS); | |
799 | return 0; | |
800 | } | |
801 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
802 | y, z, ctx); | |
803 | } | |
804 | ||
805 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
806 | const EC_POINT *point, BIGNUM *x, | |
807 | BIGNUM *y, BIGNUM *z, | |
808 | BN_CTX *ctx) | |
809 | { | |
810 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
811 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
812 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
813 | return 0; | |
814 | } | |
815 | if (group->meth != point->meth) { | |
816 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
817 | EC_R_INCOMPATIBLE_OBJECTS); | |
818 | return 0; | |
819 | } | |
820 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
821 | y, z, ctx); | |
822 | } | |
823 | ||
824 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
825 | EC_POINT *point, const BIGNUM *x, | |
826 | const BIGNUM *y, BN_CTX *ctx) | |
827 | { | |
828 | if (group->meth->point_set_affine_coordinates == 0) { | |
829 | ECerr(EC_F_EC_POINT_SET_AFFINE_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_SET_AFFINE_COORDINATES_GFP, | |
835 | EC_R_INCOMPATIBLE_OBJECTS); | |
836 | return 0; | |
837 | } | |
838 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
839 | } | |
226cc7de | 840 | |
b3310161 | 841 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
842 | int EC_POINT_set_affine_coordinates_GF2m(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_GF2M, | |
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_GF2M, | |
853 | EC_R_INCOMPATIBLE_OBJECTS); | |
854 | return 0; | |
855 | } | |
856 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
857 | } | |
b3310161 | 858 | #endif |
7793f30e | 859 | |
0f113f3e MC |
860 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
861 | const EC_POINT *point, BIGNUM *x, | |
862 | BIGNUM *y, BN_CTX *ctx) | |
863 | { | |
864 | if (group->meth->point_get_affine_coordinates == 0) { | |
865 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
866 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
867 | return 0; | |
868 | } | |
869 | if (group->meth != point->meth) { | |
870 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
871 | EC_R_INCOMPATIBLE_OBJECTS); | |
872 | return 0; | |
873 | } | |
874 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
875 | } | |
7793f30e | 876 | |
b3310161 | 877 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
878 | int EC_POINT_get_affine_coordinates_GF2m(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_GF2M, | |
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_GF2M, | |
889 | EC_R_INCOMPATIBLE_OBJECTS); | |
890 | return 0; | |
891 | } | |
892 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
893 | } | |
b3310161 | 894 | #endif |
7793f30e | 895 | |
0f113f3e MC |
896 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
897 | const EC_POINT *b, BN_CTX *ctx) | |
898 | { | |
899 | if (group->meth->add == 0) { | |
900 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
901 | return 0; | |
902 | } | |
903 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
904 | || (a->meth != b->meth)) { | |
905 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
906 | return 0; | |
907 | } | |
908 | return group->meth->add(group, r, a, b, ctx); | |
909 | } | |
910 | ||
911 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
912 | BN_CTX *ctx) | |
913 | { | |
914 | if (group->meth->dbl == 0) { | |
915 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
916 | return 0; | |
917 | } | |
918 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
919 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
920 | return 0; | |
921 | } | |
922 | return group->meth->dbl(group, r, a, ctx); | |
923 | } | |
0657bf9c | 924 | |
1d5bd6cf | 925 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
926 | { |
927 | if (group->meth->invert == 0) { | |
928 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
929 | return 0; | |
930 | } | |
931 | if (group->meth != a->meth) { | |
932 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
933 | return 0; | |
934 | } | |
935 | return group->meth->invert(group, a, ctx); | |
936 | } | |
1d5bd6cf | 937 | |
0657bf9c | 938 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
939 | { |
940 | if (group->meth->is_at_infinity == 0) { | |
941 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
942 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
943 | return 0; | |
944 | } | |
945 | if (group->meth != point->meth) { | |
946 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
947 | return 0; | |
948 | } | |
949 | return group->meth->is_at_infinity(group, point); | |
950 | } | |
951 | ||
952 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, | |
953 | BN_CTX *ctx) | |
954 | { | |
955 | if (group->meth->is_on_curve == 0) { | |
956 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
957 | return 0; | |
958 | } | |
959 | if (group->meth != point->meth) { | |
960 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
961 | return 0; | |
962 | } | |
963 | return group->meth->is_on_curve(group, point, ctx); | |
964 | } | |
965 | ||
966 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
967 | BN_CTX *ctx) | |
968 | { | |
969 | if (group->meth->point_cmp == 0) { | |
970 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
971 | return -1; | |
972 | } | |
973 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
974 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
975 | return -1; | |
976 | } | |
977 | return group->meth->point_cmp(group, a, b, ctx); | |
978 | } | |
1d5bd6cf | 979 | |
e869d4bd | 980 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
981 | { |
982 | if (group->meth->make_affine == 0) { | |
983 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
984 | return 0; | |
985 | } | |
986 | if (group->meth != point->meth) { | |
987 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
988 | return 0; | |
989 | } | |
990 | return group->meth->make_affine(group, point, ctx); | |
991 | } | |
992 | ||
993 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
994 | EC_POINT *points[], BN_CTX *ctx) | |
995 | { | |
996 | size_t i; | |
997 | ||
998 | if (group->meth->points_make_affine == 0) { | |
999 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1000 | return 0; | |
1001 | } | |
1002 | for (i = 0; i < num; i++) { | |
1003 | if (group->meth != points[i]->meth) { | |
1004 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
1005 | return 0; | |
1006 | } | |
1007 | } | |
1008 | return group->meth->points_make_affine(group, num, points, ctx); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
1013 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
1014 | * methods. | |
37c660ff BM |
1015 | */ |
1016 | ||
1017 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
1018 | size_t num, const EC_POINT *points[], |
1019 | const BIGNUM *scalars[], BN_CTX *ctx) | |
1020 | { | |
1021 | if (group->meth->mul == 0) | |
1022 | /* use default */ | |
1023 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 1024 | |
0f113f3e MC |
1025 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
1026 | } | |
37c660ff BM |
1027 | |
1028 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
1029 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
1030 | { | |
1031 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 1032 | |
0f113f3e MC |
1033 | const EC_POINT *points[1]; |
1034 | const BIGNUM *scalars[1]; | |
37c660ff | 1035 | |
0f113f3e MC |
1036 | points[0] = point; |
1037 | scalars[0] = p_scalar; | |
37c660ff | 1038 | |
0f113f3e MC |
1039 | return EC_POINTs_mul(group, r, g_scalar, |
1040 | (point != NULL | |
1041 | && p_scalar != NULL), points, scalars, ctx); | |
1042 | } | |
37c660ff BM |
1043 | |
1044 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
1045 | { |
1046 | if (group->meth->mul == 0) | |
1047 | /* use default */ | |
1048 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 1049 | |
0f113f3e MC |
1050 | if (group->meth->precompute_mult != 0) |
1051 | return group->meth->precompute_mult(group, ctx); | |
1052 | else | |
1053 | return 1; /* nothing to do, so report success */ | |
1054 | } | |
37c660ff BM |
1055 | |
1056 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
1057 | { |
1058 | if (group->meth->mul == 0) | |
1059 | /* use default */ | |
1060 | return ec_wNAF_have_precompute_mult(group); | |
1061 | ||
1062 | if (group->meth->have_precompute_mult != 0) | |
1063 | return group->meth->have_precompute_mult(group); | |
1064 | else | |
1065 | return 0; /* cannot tell whether precomputation has | |
1066 | * been performed */ | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
1071 | * returns one on success. On error it returns zero. | |
1072 | */ | |
f54be179 | 1073 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
1074 | { |
1075 | BN_CTX *ctx = BN_CTX_new(); | |
1076 | int ret = 0; | |
1077 | ||
23a1d5e9 RS |
1078 | BN_MONT_CTX_free(group->mont_data); |
1079 | group->mont_data = NULL; | |
0f113f3e MC |
1080 | |
1081 | if (ctx == NULL) | |
1082 | goto err; | |
1083 | ||
1084 | group->mont_data = BN_MONT_CTX_new(); | |
1085 | if (!group->mont_data) | |
1086 | goto err; | |
1087 | ||
1088 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
1089 | BN_MONT_CTX_free(group->mont_data); | |
1090 | group->mont_data = NULL; | |
1091 | goto err; | |
1092 | } | |
1093 | ||
1094 | ret = 1; | |
1095 | ||
1096 | err: | |
1097 | ||
23a1d5e9 | 1098 | BN_CTX_free(ctx); |
0f113f3e MC |
1099 | return ret; |
1100 | } |