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Commit | Line | Data |
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35b73a1f | 1 | /* |
3c7d0945 | 2 | * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
65e81670 | 4 | * |
aa6bb135 RS |
5 | * Licensed under the OpenSSL license (the "License"). You may not use |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
65e81670 | 9 | */ |
aa6bb135 | 10 | |
c4b36ff4 BM |
11 | #include <string.h> |
12 | ||
0657bf9c | 13 | #include <openssl/err.h> |
bb62a8b0 | 14 | #include <openssl/opensslv.h> |
0657bf9c | 15 | |
65e81670 | 16 | #include "ec_lcl.h" |
0657bf9c | 17 | |
0657bf9c BM |
18 | /* functions for EC_GROUP objects */ |
19 | ||
20 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
0f113f3e MC |
21 | { |
22 | EC_GROUP *ret; | |
23 | ||
24 | if (meth == NULL) { | |
25 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); | |
26 | return NULL; | |
27 | } | |
28 | if (meth->group_init == 0) { | |
29 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
30 | return NULL; | |
31 | } | |
32 | ||
64b25758 | 33 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
34 | if (ret == NULL) { |
35 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
36 | return NULL; | |
37 | } | |
38 | ||
39 | ret->meth = meth; | |
6903e2e7 DSH |
40 | if ((ret->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) { |
41 | ret->order = BN_new(); | |
42 | if (ret->order == NULL) | |
43 | goto err; | |
44 | ret->cofactor = BN_new(); | |
45 | if (ret->cofactor == NULL) | |
46 | goto err; | |
47 | } | |
86f300d3 | 48 | ret->asn1_flag = OPENSSL_EC_NAMED_CURVE; |
0f113f3e | 49 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
0f113f3e MC |
50 | if (!meth->group_init(ret)) |
51 | goto err; | |
0f113f3e | 52 | return ret; |
64b25758 | 53 | |
0f113f3e | 54 | err: |
23a1d5e9 RS |
55 | BN_free(ret->order); |
56 | BN_free(ret->cofactor); | |
0f113f3e MC |
57 | OPENSSL_free(ret); |
58 | return NULL; | |
59 | } | |
0657bf9c | 60 | |
2c52ac9b | 61 | void EC_pre_comp_free(EC_GROUP *group) |
3aef36ff RS |
62 | { |
63 | switch (group->pre_comp_type) { | |
f3b3d7f0 | 64 | case PCT_none: |
3aef36ff | 65 | break; |
66117ab0 | 66 | case PCT_nistz256: |
f3b3d7f0 | 67 | #ifdef ECP_NISTZ256_ASM |
3aef36ff | 68 | EC_nistz256_pre_comp_free(group->pre_comp.nistz256); |
e69aa800 | 69 | #endif |
f3b3d7f0 | 70 | break; |
3aef36ff | 71 | #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 |
66117ab0 | 72 | case PCT_nistp224: |
3aef36ff RS |
73 | EC_nistp224_pre_comp_free(group->pre_comp.nistp224); |
74 | break; | |
66117ab0 | 75 | case PCT_nistp256: |
3aef36ff RS |
76 | EC_nistp256_pre_comp_free(group->pre_comp.nistp256); |
77 | break; | |
66117ab0 | 78 | case PCT_nistp521: |
3aef36ff RS |
79 | EC_nistp521_pre_comp_free(group->pre_comp.nistp521); |
80 | break; | |
f3b3d7f0 RS |
81 | #else |
82 | case PCT_nistp224: | |
83 | case PCT_nistp256: | |
84 | case PCT_nistp521: | |
85 | break; | |
3aef36ff | 86 | #endif |
66117ab0 | 87 | case PCT_ec: |
3aef36ff RS |
88 | EC_ec_pre_comp_free(group->pre_comp.ec); |
89 | break; | |
90 | } | |
91 | group->pre_comp.ec = NULL; | |
92 | } | |
93 | ||
0657bf9c | 94 | void EC_GROUP_free(EC_GROUP *group) |
0f113f3e MC |
95 | { |
96 | if (!group) | |
97 | return; | |
7711de24 | 98 | |
0f113f3e MC |
99 | if (group->meth->group_finish != 0) |
100 | group->meth->group_finish(group); | |
df9cc153 | 101 | |
2c52ac9b | 102 | EC_pre_comp_free(group); |
23a1d5e9 | 103 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 104 | EC_POINT_free(group->generator); |
0f113f3e MC |
105 | BN_free(group->order); |
106 | BN_free(group->cofactor); | |
25aaa98a | 107 | OPENSSL_free(group->seed); |
0f113f3e MC |
108 | OPENSSL_free(group); |
109 | } | |
0657bf9c BM |
110 | |
111 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
112 | { |
113 | if (!group) | |
114 | return; | |
df9cc153 | 115 | |
0f113f3e MC |
116 | if (group->meth->group_clear_finish != 0) |
117 | group->meth->group_clear_finish(group); | |
118 | else if (group->meth->group_finish != 0) | |
119 | group->meth->group_finish(group); | |
df9cc153 | 120 | |
2c52ac9b | 121 | EC_pre_comp_free(group); |
23a1d5e9 | 122 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 123 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
124 | BN_clear_free(group->order); |
125 | BN_clear_free(group->cofactor); | |
4b45c6e5 | 126 | OPENSSL_clear_free(group->seed, group->seed_len); |
b4faea50 | 127 | OPENSSL_clear_free(group, sizeof(*group)); |
0f113f3e | 128 | } |
0657bf9c BM |
129 | |
130 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e | 131 | { |
0f113f3e MC |
132 | if (dest->meth->group_copy == 0) { |
133 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
134 | return 0; | |
135 | } | |
136 | if (dest->meth != src->meth) { | |
137 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
138 | return 0; | |
139 | } | |
140 | if (dest == src) | |
141 | return 1; | |
142 | ||
3aef36ff RS |
143 | /* Copy precomputed */ |
144 | dest->pre_comp_type = src->pre_comp_type; | |
145 | switch (src->pre_comp_type) { | |
f3b3d7f0 | 146 | case PCT_none: |
3aef36ff RS |
147 | dest->pre_comp.ec = NULL; |
148 | break; | |
66117ab0 | 149 | case PCT_nistz256: |
f3b3d7f0 | 150 | #ifdef ECP_NISTZ256_ASM |
3aef36ff | 151 | dest->pre_comp.nistz256 = EC_nistz256_pre_comp_dup(src->pre_comp.nistz256); |
e69aa800 | 152 | #endif |
f3b3d7f0 | 153 | break; |
3aef36ff | 154 | #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 |
66117ab0 | 155 | case PCT_nistp224: |
3aef36ff RS |
156 | dest->pre_comp.nistp224 = EC_nistp224_pre_comp_dup(src->pre_comp.nistp224); |
157 | break; | |
66117ab0 | 158 | case PCT_nistp256: |
3aef36ff RS |
159 | dest->pre_comp.nistp256 = EC_nistp256_pre_comp_dup(src->pre_comp.nistp256); |
160 | break; | |
66117ab0 | 161 | case PCT_nistp521: |
3aef36ff RS |
162 | dest->pre_comp.nistp521 = EC_nistp521_pre_comp_dup(src->pre_comp.nistp521); |
163 | break; | |
f3b3d7f0 RS |
164 | #else |
165 | case PCT_nistp224: | |
166 | case PCT_nistp256: | |
167 | case PCT_nistp521: | |
168 | break; | |
3aef36ff | 169 | #endif |
66117ab0 | 170 | case PCT_ec: |
3aef36ff RS |
171 | dest->pre_comp.ec = EC_ec_pre_comp_dup(src->pre_comp.ec); |
172 | break; | |
0f113f3e MC |
173 | } |
174 | ||
175 | if (src->mont_data != NULL) { | |
176 | if (dest->mont_data == NULL) { | |
177 | dest->mont_data = BN_MONT_CTX_new(); | |
178 | if (dest->mont_data == NULL) | |
179 | return 0; | |
180 | } | |
181 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
182 | return 0; | |
183 | } else { | |
184 | /* src->generator == NULL */ | |
23a1d5e9 RS |
185 | BN_MONT_CTX_free(dest->mont_data); |
186 | dest->mont_data = NULL; | |
0f113f3e | 187 | } |
0657bf9c | 188 | |
0f113f3e MC |
189 | if (src->generator != NULL) { |
190 | if (dest->generator == NULL) { | |
191 | dest->generator = EC_POINT_new(dest); | |
192 | if (dest->generator == NULL) | |
193 | return 0; | |
194 | } | |
195 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
196 | return 0; | |
197 | } else { | |
198 | /* src->generator == NULL */ | |
8fdc3734 RS |
199 | EC_POINT_clear_free(dest->generator); |
200 | dest->generator = NULL; | |
0f113f3e MC |
201 | } |
202 | ||
6903e2e7 DSH |
203 | if ((src->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) { |
204 | if (!BN_copy(dest->order, src->order)) | |
205 | return 0; | |
206 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
207 | return 0; | |
208 | } | |
0f113f3e MC |
209 | |
210 | dest->curve_name = src->curve_name; | |
211 | dest->asn1_flag = src->asn1_flag; | |
212 | dest->asn1_form = src->asn1_form; | |
213 | ||
214 | if (src->seed) { | |
b548a1f1 | 215 | OPENSSL_free(dest->seed); |
0f113f3e MC |
216 | dest->seed = OPENSSL_malloc(src->seed_len); |
217 | if (dest->seed == NULL) | |
218 | return 0; | |
219 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
220 | return 0; | |
221 | dest->seed_len = src->seed_len; | |
222 | } else { | |
b548a1f1 | 223 | OPENSSL_free(dest->seed); |
0f113f3e MC |
224 | dest->seed = NULL; |
225 | dest->seed_len = 0; | |
226 | } | |
227 | ||
228 | return dest->meth->group_copy(dest, src); | |
229 | } | |
0657bf9c | 230 | |
7793f30e | 231 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
232 | { |
233 | EC_GROUP *t = NULL; | |
234 | int ok = 0; | |
7793f30e | 235 | |
0f113f3e MC |
236 | if (a == NULL) |
237 | return NULL; | |
7793f30e | 238 | |
0f113f3e | 239 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
26a7d938 | 240 | return NULL; |
0f113f3e MC |
241 | if (!EC_GROUP_copy(t, a)) |
242 | goto err; | |
7793f30e | 243 | |
0f113f3e | 244 | ok = 1; |
7793f30e | 245 | |
0f113f3e MC |
246 | err: |
247 | if (!ok) { | |
8fdc3734 | 248 | EC_GROUP_free(t); |
0f113f3e | 249 | return NULL; |
8fdc3734 | 250 | } |
0f113f3e MC |
251 | return t; |
252 | } | |
7793f30e | 253 | |
48fe4d62 | 254 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
255 | { |
256 | return group->meth; | |
257 | } | |
48fe4d62 | 258 | |
458c2917 | 259 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
260 | { |
261 | return meth->field_type; | |
262 | } | |
263 | ||
eb791696 AP |
264 | static int ec_precompute_mont_data(EC_GROUP *); |
265 | ||
0f113f3e MC |
266 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, |
267 | const BIGNUM *order, const BIGNUM *cofactor) | |
268 | { | |
269 | if (generator == NULL) { | |
270 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | if (group->generator == NULL) { | |
275 | group->generator = EC_POINT_new(group); | |
276 | if (group->generator == NULL) | |
277 | return 0; | |
278 | } | |
279 | if (!EC_POINT_copy(group->generator, generator)) | |
280 | return 0; | |
281 | ||
282 | if (order != NULL) { | |
283 | if (!BN_copy(group->order, order)) | |
284 | return 0; | |
285 | } else | |
286 | BN_zero(group->order); | |
287 | ||
288 | if (cofactor != NULL) { | |
289 | if (!BN_copy(group->cofactor, cofactor)) | |
290 | return 0; | |
291 | } else | |
292 | BN_zero(group->cofactor); | |
293 | ||
294 | /* | |
3a6a4a93 | 295 | * Some groups have an order with |
0f113f3e MC |
296 | * factors of two, which makes the Montgomery setup fail. |
297 | * |group->mont_data| will be NULL in this case. | |
298 | */ | |
3a6a4a93 BB |
299 | if (BN_is_odd(group->order)) { |
300 | return ec_precompute_mont_data(group); | |
301 | } | |
0f113f3e | 302 | |
3a6a4a93 BB |
303 | BN_MONT_CTX_free(group->mont_data); |
304 | group->mont_data = NULL; | |
0f113f3e MC |
305 | return 1; |
306 | } | |
bb62a8b0 | 307 | |
9dd84053 | 308 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
309 | { |
310 | return group->generator; | |
311 | } | |
bb62a8b0 | 312 | |
f54be179 | 313 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
314 | { |
315 | return group->mont_data; | |
316 | } | |
bb62a8b0 | 317 | |
b6db386f | 318 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e | 319 | { |
be2e334f DSH |
320 | if (group->order == NULL) |
321 | return 0; | |
0f113f3e MC |
322 | if (!BN_copy(order, group->order)) |
323 | return 0; | |
0657bf9c | 324 | |
0f113f3e MC |
325 | return !BN_is_zero(order); |
326 | } | |
0657bf9c | 327 | |
be2e334f DSH |
328 | const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group) |
329 | { | |
330 | return group->order; | |
331 | } | |
332 | ||
333 | int EC_GROUP_order_bits(const EC_GROUP *group) | |
334 | { | |
77470e98 | 335 | return group->meth->group_order_bits(group); |
be2e334f DSH |
336 | } |
337 | ||
0f113f3e MC |
338 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
339 | BN_CTX *ctx) | |
340 | { | |
be2e334f DSH |
341 | |
342 | if (group->cofactor == NULL) | |
343 | return 0; | |
0f113f3e MC |
344 | if (!BN_copy(cofactor, group->cofactor)) |
345 | return 0; | |
48fe4d62 | 346 | |
0f113f3e MC |
347 | return !BN_is_zero(group->cofactor); |
348 | } | |
48fe4d62 | 349 | |
be2e334f DSH |
350 | const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group) |
351 | { | |
352 | return group->cofactor; | |
353 | } | |
354 | ||
7dc17a6c | 355 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
356 | { |
357 | group->curve_name = nid; | |
358 | } | |
b6db386f | 359 | |
7dc17a6c | 360 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
361 | { |
362 | return group->curve_name; | |
363 | } | |
b6db386f | 364 | |
458c2917 | 365 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
366 | { |
367 | group->asn1_flag = flag; | |
368 | } | |
458c2917 BM |
369 | |
370 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
371 | { |
372 | return group->asn1_flag; | |
373 | } | |
458c2917 | 374 | |
0f113f3e | 375 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 376 | point_conversion_form_t form) |
0f113f3e MC |
377 | { |
378 | group->asn1_form = form; | |
379 | } | |
254ef80d | 380 | |
0f113f3e MC |
381 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
382 | *group) | |
383 | { | |
384 | return group->asn1_form; | |
385 | } | |
254ef80d | 386 | |
5f3d6f70 | 387 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 388 | { |
b548a1f1 RS |
389 | OPENSSL_free(group->seed); |
390 | group->seed = NULL; | |
391 | group->seed_len = 0; | |
5f3d6f70 | 392 | |
0f113f3e MC |
393 | if (!len || !p) |
394 | return 1; | |
5f3d6f70 | 395 | |
0f113f3e MC |
396 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
397 | return 0; | |
398 | memcpy(group->seed, p, len); | |
399 | group->seed_len = len; | |
5f3d6f70 | 400 | |
0f113f3e MC |
401 | return len; |
402 | } | |
5f3d6f70 BM |
403 | |
404 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
405 | { |
406 | return group->seed; | |
407 | } | |
5f3d6f70 BM |
408 | |
409 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
410 | { |
411 | return group->seed_len; | |
412 | } | |
413 | ||
414 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
415 | const BIGNUM *b, BN_CTX *ctx) | |
416 | { | |
417 | if (group->meth->group_set_curve == 0) { | |
418 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
419 | return 0; | |
420 | } | |
421 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
422 | } | |
423 | ||
424 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
425 | BIGNUM *b, BN_CTX *ctx) | |
426 | { | |
427 | if (group->meth->group_get_curve == 0) { | |
428 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
429 | return 0; | |
430 | } | |
431 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
432 | } | |
7793f30e | 433 | |
b3310161 | 434 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
435 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
436 | const BIGNUM *b, BN_CTX *ctx) | |
437 | { | |
438 | if (group->meth->group_set_curve == 0) { | |
439 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
440 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
441 | return 0; | |
442 | } | |
443 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
444 | } | |
445 | ||
446 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
447 | BIGNUM *b, BN_CTX *ctx) | |
448 | { | |
449 | if (group->meth->group_get_curve == 0) { | |
450 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
451 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
452 | return 0; | |
453 | } | |
454 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
455 | } | |
b3310161 | 456 | #endif |
7793f30e BM |
457 | |
458 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
459 | { |
460 | if (group->meth->group_get_degree == 0) { | |
461 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
462 | return 0; | |
463 | } | |
464 | return group->meth->group_get_degree(group); | |
465 | } | |
48fe4d62 | 466 | |
17d6bb81 | 467 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
468 | { |
469 | if (group->meth->group_check_discriminant == 0) { | |
470 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
471 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
472 | return 0; | |
473 | } | |
474 | return group->meth->group_check_discriminant(group, ctx); | |
475 | } | |
af28dd6c | 476 | |
ada0e717 | 477 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
478 | { |
479 | int r = 0; | |
480 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
481 | BN_CTX *ctx_new = NULL; | |
482 | ||
483 | /* compare the field types */ | |
484 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
485 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
486 | return 1; | |
487 | /* compare the curve name (if present in both) */ | |
488 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
489 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
490 | return 1; | |
6903e2e7 DSH |
491 | if (a->meth->flags & EC_FLAGS_CUSTOM_CURVE) |
492 | return 0; | |
0f113f3e | 493 | |
90945fa3 | 494 | if (ctx == NULL) |
0f113f3e | 495 | ctx_new = ctx = BN_CTX_new(); |
90945fa3 | 496 | if (ctx == NULL) |
0f113f3e MC |
497 | return -1; |
498 | ||
499 | BN_CTX_start(ctx); | |
500 | a1 = BN_CTX_get(ctx); | |
501 | a2 = BN_CTX_get(ctx); | |
502 | a3 = BN_CTX_get(ctx); | |
503 | b1 = BN_CTX_get(ctx); | |
504 | b2 = BN_CTX_get(ctx); | |
505 | b3 = BN_CTX_get(ctx); | |
90945fa3 | 506 | if (b3 == NULL) { |
0f113f3e | 507 | BN_CTX_end(ctx); |
23a1d5e9 | 508 | BN_CTX_free(ctx_new); |
0f113f3e MC |
509 | return -1; |
510 | } | |
511 | ||
512 | /* | |
513 | * XXX This approach assumes that the external representation of curves | |
514 | * over the same field type is the same. | |
515 | */ | |
516 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
517 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
518 | r = 1; | |
519 | ||
520 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
521 | r = 1; | |
522 | ||
523 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
524 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
525 | EC_GROUP_get0_generator(b), ctx)) | |
526 | r = 1; | |
527 | ||
528 | if (!r) { | |
be2e334f | 529 | const BIGNUM *ao, *bo, *ac, *bc; |
0f113f3e | 530 | /* compare the order and cofactor */ |
be2e334f DSH |
531 | ao = EC_GROUP_get0_order(a); |
532 | bo = EC_GROUP_get0_order(b); | |
533 | ac = EC_GROUP_get0_cofactor(a); | |
534 | bc = EC_GROUP_get0_cofactor(b); | |
535 | if (ao == NULL || bo == NULL) { | |
0f113f3e | 536 | BN_CTX_end(ctx); |
23a1d5e9 | 537 | BN_CTX_free(ctx_new); |
0f113f3e MC |
538 | return -1; |
539 | } | |
be2e334f | 540 | if (BN_cmp(ao, bo) || BN_cmp(ac, bc)) |
0f113f3e MC |
541 | r = 1; |
542 | } | |
543 | ||
544 | BN_CTX_end(ctx); | |
23a1d5e9 | 545 | BN_CTX_free(ctx_new); |
ada0e717 | 546 | |
0f113f3e MC |
547 | return r; |
548 | } | |
ada0e717 | 549 | |
0657bf9c BM |
550 | /* functions for EC_POINT objects */ |
551 | ||
552 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
553 | { |
554 | EC_POINT *ret; | |
555 | ||
556 | if (group == NULL) { | |
557 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
558 | return NULL; | |
559 | } | |
560 | if (group->meth->point_init == 0) { | |
561 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
562 | return NULL; | |
563 | } | |
564 | ||
1b4cf96f | 565 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
566 | if (ret == NULL) { |
567 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
568 | return NULL; | |
569 | } | |
570 | ||
571 | ret->meth = group->meth; | |
572 | ||
573 | if (!ret->meth->point_init(ret)) { | |
574 | OPENSSL_free(ret); | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | return ret; | |
579 | } | |
0657bf9c BM |
580 | |
581 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
582 | { |
583 | if (!point) | |
584 | return; | |
7711de24 | 585 | |
0f113f3e MC |
586 | if (point->meth->point_finish != 0) |
587 | point->meth->point_finish(point); | |
588 | OPENSSL_free(point); | |
589 | } | |
0657bf9c BM |
590 | |
591 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
592 | { |
593 | if (!point) | |
594 | return; | |
595 | ||
596 | if (point->meth->point_clear_finish != 0) | |
597 | point->meth->point_clear_finish(point); | |
598 | else if (point->meth->point_finish != 0) | |
599 | point->meth->point_finish(point); | |
b4faea50 | 600 | OPENSSL_clear_free(point, sizeof(*point)); |
0f113f3e | 601 | } |
0657bf9c BM |
602 | |
603 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
604 | { |
605 | if (dest->meth->point_copy == 0) { | |
606 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
607 | return 0; | |
608 | } | |
609 | if (dest->meth != src->meth) { | |
610 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
611 | return 0; | |
612 | } | |
613 | if (dest == src) | |
614 | return 1; | |
615 | return dest->meth->point_copy(dest, src); | |
616 | } | |
0657bf9c | 617 | |
7793f30e | 618 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
619 | { |
620 | EC_POINT *t; | |
621 | int r; | |
622 | ||
623 | if (a == NULL) | |
624 | return NULL; | |
625 | ||
626 | t = EC_POINT_new(group); | |
627 | if (t == NULL) | |
26a7d938 | 628 | return NULL; |
0f113f3e MC |
629 | r = EC_POINT_copy(t, a); |
630 | if (!r) { | |
631 | EC_POINT_free(t); | |
632 | return NULL; | |
8fdc3734 RS |
633 | } |
634 | return t; | |
0f113f3e | 635 | } |
7793f30e | 636 | |
48fe4d62 | 637 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
638 | { |
639 | return point->meth; | |
640 | } | |
48fe4d62 | 641 | |
226cc7de | 642 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
643 | { |
644 | if (group->meth->point_set_to_infinity == 0) { | |
645 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
646 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
647 | return 0; | |
648 | } | |
649 | if (group->meth != point->meth) { | |
650 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
651 | return 0; | |
652 | } | |
653 | return group->meth->point_set_to_infinity(group, point); | |
654 | } | |
655 | ||
656 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
657 | EC_POINT *point, const BIGNUM *x, | |
658 | const BIGNUM *y, const BIGNUM *z, | |
659 | BN_CTX *ctx) | |
660 | { | |
661 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
662 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
663 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
664 | return 0; | |
665 | } | |
666 | if (group->meth != point->meth) { | |
667 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
668 | EC_R_INCOMPATIBLE_OBJECTS); | |
669 | return 0; | |
670 | } | |
671 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
672 | y, z, ctx); | |
673 | } | |
674 | ||
675 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
676 | const EC_POINT *point, BIGNUM *x, | |
677 | BIGNUM *y, BIGNUM *z, | |
678 | BN_CTX *ctx) | |
679 | { | |
680 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
681 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
682 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
683 | return 0; | |
684 | } | |
685 | if (group->meth != point->meth) { | |
686 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
687 | EC_R_INCOMPATIBLE_OBJECTS); | |
688 | return 0; | |
689 | } | |
690 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
691 | y, z, ctx); | |
692 | } | |
693 | ||
694 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
695 | EC_POINT *point, const BIGNUM *x, | |
696 | const BIGNUM *y, BN_CTX *ctx) | |
697 | { | |
698 | if (group->meth->point_set_affine_coordinates == 0) { | |
699 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
700 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
701 | return 0; | |
702 | } | |
703 | if (group->meth != point->meth) { | |
704 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
705 | EC_R_INCOMPATIBLE_OBJECTS); | |
706 | return 0; | |
707 | } | |
1e2012b7 EK |
708 | if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx)) |
709 | return 0; | |
710 | ||
711 | if (EC_POINT_is_on_curve(group, point, ctx) <= 0) { | |
712 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
713 | EC_R_POINT_IS_NOT_ON_CURVE); | |
714 | return 0; | |
715 | } | |
716 | return 1; | |
0f113f3e | 717 | } |
226cc7de | 718 | |
b3310161 | 719 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
720 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
721 | EC_POINT *point, const BIGNUM *x, | |
722 | const BIGNUM *y, BN_CTX *ctx) | |
723 | { | |
724 | if (group->meth->point_set_affine_coordinates == 0) { | |
725 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
726 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
727 | return 0; | |
728 | } | |
729 | if (group->meth != point->meth) { | |
730 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
731 | EC_R_INCOMPATIBLE_OBJECTS); | |
732 | return 0; | |
733 | } | |
1e2012b7 EK |
734 | if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx)) |
735 | return 0; | |
736 | ||
737 | if (EC_POINT_is_on_curve(group, point, ctx) <= 0) { | |
738 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
739 | EC_R_POINT_IS_NOT_ON_CURVE); | |
740 | return 0; | |
741 | } | |
742 | return 1; | |
0f113f3e | 743 | } |
b3310161 | 744 | #endif |
7793f30e | 745 | |
0f113f3e MC |
746 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
747 | const EC_POINT *point, BIGNUM *x, | |
748 | BIGNUM *y, BN_CTX *ctx) | |
749 | { | |
750 | if (group->meth->point_get_affine_coordinates == 0) { | |
751 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
752 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
753 | return 0; | |
754 | } | |
755 | if (group->meth != point->meth) { | |
756 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
757 | EC_R_INCOMPATIBLE_OBJECTS); | |
758 | return 0; | |
759 | } | |
760 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
761 | } | |
7793f30e | 762 | |
b3310161 | 763 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
764 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
765 | const EC_POINT *point, BIGNUM *x, | |
766 | BIGNUM *y, BN_CTX *ctx) | |
767 | { | |
768 | if (group->meth->point_get_affine_coordinates == 0) { | |
769 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
770 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
771 | return 0; | |
772 | } | |
773 | if (group->meth != point->meth) { | |
774 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
775 | EC_R_INCOMPATIBLE_OBJECTS); | |
776 | return 0; | |
777 | } | |
778 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
779 | } | |
b3310161 | 780 | #endif |
7793f30e | 781 | |
0f113f3e MC |
782 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
783 | const EC_POINT *b, BN_CTX *ctx) | |
784 | { | |
785 | if (group->meth->add == 0) { | |
786 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
787 | return 0; | |
788 | } | |
789 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
790 | || (a->meth != b->meth)) { | |
791 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
792 | return 0; | |
793 | } | |
794 | return group->meth->add(group, r, a, b, ctx); | |
795 | } | |
796 | ||
797 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
798 | BN_CTX *ctx) | |
799 | { | |
800 | if (group->meth->dbl == 0) { | |
801 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
802 | return 0; | |
803 | } | |
804 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
805 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
806 | return 0; | |
807 | } | |
808 | return group->meth->dbl(group, r, a, ctx); | |
809 | } | |
0657bf9c | 810 | |
1d5bd6cf | 811 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
812 | { |
813 | if (group->meth->invert == 0) { | |
814 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
815 | return 0; | |
816 | } | |
817 | if (group->meth != a->meth) { | |
818 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
819 | return 0; | |
820 | } | |
821 | return group->meth->invert(group, a, ctx); | |
822 | } | |
1d5bd6cf | 823 | |
0657bf9c | 824 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
825 | { |
826 | if (group->meth->is_at_infinity == 0) { | |
827 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
828 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
829 | return 0; | |
830 | } | |
831 | if (group->meth != point->meth) { | |
832 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
833 | return 0; | |
834 | } | |
835 | return group->meth->is_at_infinity(group, point); | |
836 | } | |
837 | ||
68886be7 MC |
838 | /* |
839 | * Check whether an EC_POINT is on the curve or not. Note that the return | |
840 | * value for this function should NOT be treated as a boolean. Return values: | |
841 | * 1: The point is on the curve | |
842 | * 0: The point is not on the curve | |
843 | * -1: An error occurred | |
844 | */ | |
0f113f3e MC |
845 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
846 | BN_CTX *ctx) | |
847 | { | |
848 | if (group->meth->is_on_curve == 0) { | |
849 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
850 | return 0; | |
851 | } | |
852 | if (group->meth != point->meth) { | |
853 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
854 | return 0; | |
855 | } | |
856 | return group->meth->is_on_curve(group, point, ctx); | |
857 | } | |
858 | ||
859 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
860 | BN_CTX *ctx) | |
861 | { | |
862 | if (group->meth->point_cmp == 0) { | |
863 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
864 | return -1; | |
865 | } | |
866 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
867 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
868 | return -1; | |
869 | } | |
870 | return group->meth->point_cmp(group, a, b, ctx); | |
871 | } | |
1d5bd6cf | 872 | |
e869d4bd | 873 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
874 | { |
875 | if (group->meth->make_affine == 0) { | |
876 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
877 | return 0; | |
878 | } | |
879 | if (group->meth != point->meth) { | |
880 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
881 | return 0; | |
882 | } | |
883 | return group->meth->make_affine(group, point, ctx); | |
884 | } | |
885 | ||
886 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
887 | EC_POINT *points[], BN_CTX *ctx) | |
888 | { | |
889 | size_t i; | |
890 | ||
891 | if (group->meth->points_make_affine == 0) { | |
892 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
893 | return 0; | |
894 | } | |
895 | for (i = 0; i < num; i++) { | |
896 | if (group->meth != points[i]->meth) { | |
897 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
898 | return 0; | |
899 | } | |
900 | } | |
901 | return group->meth->points_make_affine(group, num, points, ctx); | |
902 | } | |
903 | ||
904 | /* | |
905 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
906 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
907 | * methods. | |
37c660ff BM |
908 | */ |
909 | ||
910 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
911 | size_t num, const EC_POINT *points[], |
912 | const BIGNUM *scalars[], BN_CTX *ctx) | |
913 | { | |
914 | if (group->meth->mul == 0) | |
915 | /* use default */ | |
916 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 917 | |
0f113f3e MC |
918 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
919 | } | |
37c660ff BM |
920 | |
921 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
922 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
923 | { | |
924 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 925 | |
0f113f3e MC |
926 | const EC_POINT *points[1]; |
927 | const BIGNUM *scalars[1]; | |
37c660ff | 928 | |
0f113f3e MC |
929 | points[0] = point; |
930 | scalars[0] = p_scalar; | |
37c660ff | 931 | |
0f113f3e MC |
932 | return EC_POINTs_mul(group, r, g_scalar, |
933 | (point != NULL | |
934 | && p_scalar != NULL), points, scalars, ctx); | |
935 | } | |
37c660ff BM |
936 | |
937 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
938 | { |
939 | if (group->meth->mul == 0) | |
940 | /* use default */ | |
941 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 942 | |
0f113f3e MC |
943 | if (group->meth->precompute_mult != 0) |
944 | return group->meth->precompute_mult(group, ctx); | |
945 | else | |
946 | return 1; /* nothing to do, so report success */ | |
947 | } | |
37c660ff BM |
948 | |
949 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
950 | { |
951 | if (group->meth->mul == 0) | |
952 | /* use default */ | |
953 | return ec_wNAF_have_precompute_mult(group); | |
954 | ||
955 | if (group->meth->have_precompute_mult != 0) | |
956 | return group->meth->have_precompute_mult(group); | |
957 | else | |
958 | return 0; /* cannot tell whether precomputation has | |
959 | * been performed */ | |
960 | } | |
961 | ||
962 | /* | |
963 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
964 | * returns one on success. On error it returns zero. | |
965 | */ | |
eb791696 | 966 | static int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
967 | { |
968 | BN_CTX *ctx = BN_CTX_new(); | |
969 | int ret = 0; | |
970 | ||
23a1d5e9 RS |
971 | BN_MONT_CTX_free(group->mont_data); |
972 | group->mont_data = NULL; | |
0f113f3e MC |
973 | |
974 | if (ctx == NULL) | |
975 | goto err; | |
976 | ||
977 | group->mont_data = BN_MONT_CTX_new(); | |
90945fa3 | 978 | if (group->mont_data == NULL) |
0f113f3e MC |
979 | goto err; |
980 | ||
981 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
982 | BN_MONT_CTX_free(group->mont_data); | |
983 | group->mont_data = NULL; | |
984 | goto err; | |
985 | } | |
986 | ||
987 | ret = 1; | |
988 | ||
989 | err: | |
990 | ||
23a1d5e9 | 991 | BN_CTX_free(ctx); |
0f113f3e MC |
992 | return ret; |
993 | } | |
3aef36ff RS |
994 | |
995 | int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg) | |
996 | { | |
997 | return CRYPTO_set_ex_data(&key->ex_data, idx, arg); | |
998 | } | |
999 | ||
1000 | void *EC_KEY_get_ex_data(const EC_KEY *key, int idx) | |
1001 | { | |
1002 | return CRYPTO_get_ex_data(&key->ex_data, idx); | |
1003 | } | |
77470e98 DSH |
1004 | |
1005 | int ec_group_simple_order_bits(const EC_GROUP *group) | |
1006 | { | |
1007 | if (group->order == NULL) | |
1008 | return 0; | |
1009 | return BN_num_bits(group->order); | |
1010 | } | |
eb791696 AP |
1011 | |
1012 | int EC_GROUP_do_inverse_ord(const EC_GROUP *group, BIGNUM *res, | |
1013 | BIGNUM *x, BN_CTX *ctx) | |
1014 | { | |
1015 | if (group->meth->field_inverse_mod_ord != NULL) | |
1016 | return group->meth->field_inverse_mod_ord(group, res, x, ctx); | |
1017 | else | |
1018 | return 0; | |
1019 | } |