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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); |
cdb10bae RS |
216 | if ((dest->seed = OPENSSL_malloc(src->seed_len)) == NULL) { |
217 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 218 | return 0; |
cdb10bae | 219 | } |
0f113f3e MC |
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 | 240 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
26a7d938 | 241 | return NULL; |
0f113f3e MC |
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 | ||
eb791696 AP |
265 | static int ec_precompute_mont_data(EC_GROUP *); |
266 | ||
0f113f3e MC |
267 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, |
268 | const BIGNUM *order, const BIGNUM *cofactor) | |
269 | { | |
270 | if (generator == NULL) { | |
271 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | if (group->generator == NULL) { | |
276 | group->generator = EC_POINT_new(group); | |
277 | if (group->generator == NULL) | |
278 | return 0; | |
279 | } | |
280 | if (!EC_POINT_copy(group->generator, generator)) | |
281 | return 0; | |
282 | ||
283 | if (order != NULL) { | |
284 | if (!BN_copy(group->order, order)) | |
285 | return 0; | |
286 | } else | |
287 | BN_zero(group->order); | |
288 | ||
289 | if (cofactor != NULL) { | |
290 | if (!BN_copy(group->cofactor, cofactor)) | |
291 | return 0; | |
292 | } else | |
293 | BN_zero(group->cofactor); | |
294 | ||
295 | /* | |
3a6a4a93 | 296 | * Some groups have an order with |
0f113f3e MC |
297 | * factors of two, which makes the Montgomery setup fail. |
298 | * |group->mont_data| will be NULL in this case. | |
299 | */ | |
3a6a4a93 BB |
300 | if (BN_is_odd(group->order)) { |
301 | return ec_precompute_mont_data(group); | |
302 | } | |
0f113f3e | 303 | |
3a6a4a93 BB |
304 | BN_MONT_CTX_free(group->mont_data); |
305 | group->mont_data = NULL; | |
0f113f3e MC |
306 | return 1; |
307 | } | |
bb62a8b0 | 308 | |
9dd84053 | 309 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
310 | { |
311 | return group->generator; | |
312 | } | |
bb62a8b0 | 313 | |
f54be179 | 314 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
315 | { |
316 | return group->mont_data; | |
317 | } | |
bb62a8b0 | 318 | |
b6db386f | 319 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e | 320 | { |
be2e334f DSH |
321 | if (group->order == NULL) |
322 | return 0; | |
0f113f3e MC |
323 | if (!BN_copy(order, group->order)) |
324 | return 0; | |
0657bf9c | 325 | |
0f113f3e MC |
326 | return !BN_is_zero(order); |
327 | } | |
0657bf9c | 328 | |
be2e334f DSH |
329 | const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group) |
330 | { | |
331 | return group->order; | |
332 | } | |
333 | ||
334 | int EC_GROUP_order_bits(const EC_GROUP *group) | |
335 | { | |
77470e98 | 336 | return group->meth->group_order_bits(group); |
be2e334f DSH |
337 | } |
338 | ||
0f113f3e MC |
339 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
340 | BN_CTX *ctx) | |
341 | { | |
be2e334f DSH |
342 | |
343 | if (group->cofactor == NULL) | |
344 | return 0; | |
0f113f3e MC |
345 | if (!BN_copy(cofactor, group->cofactor)) |
346 | return 0; | |
48fe4d62 | 347 | |
0f113f3e MC |
348 | return !BN_is_zero(group->cofactor); |
349 | } | |
48fe4d62 | 350 | |
be2e334f DSH |
351 | const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group) |
352 | { | |
353 | return group->cofactor; | |
354 | } | |
355 | ||
7dc17a6c | 356 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
357 | { |
358 | group->curve_name = nid; | |
359 | } | |
b6db386f | 360 | |
7dc17a6c | 361 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
362 | { |
363 | return group->curve_name; | |
364 | } | |
b6db386f | 365 | |
458c2917 | 366 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
367 | { |
368 | group->asn1_flag = flag; | |
369 | } | |
458c2917 BM |
370 | |
371 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
372 | { |
373 | return group->asn1_flag; | |
374 | } | |
458c2917 | 375 | |
0f113f3e | 376 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 377 | point_conversion_form_t form) |
0f113f3e MC |
378 | { |
379 | group->asn1_form = form; | |
380 | } | |
254ef80d | 381 | |
0f113f3e MC |
382 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
383 | *group) | |
384 | { | |
385 | return group->asn1_form; | |
386 | } | |
254ef80d | 387 | |
5f3d6f70 | 388 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 389 | { |
b548a1f1 RS |
390 | OPENSSL_free(group->seed); |
391 | group->seed = NULL; | |
392 | group->seed_len = 0; | |
5f3d6f70 | 393 | |
0f113f3e MC |
394 | if (!len || !p) |
395 | return 1; | |
5f3d6f70 | 396 | |
f06080cb F |
397 | if ((group->seed = OPENSSL_malloc(len)) == NULL) { |
398 | ECerr(EC_F_EC_GROUP_SET_SEED, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 399 | return 0; |
f06080cb | 400 | } |
0f113f3e MC |
401 | memcpy(group->seed, p, len); |
402 | group->seed_len = len; | |
5f3d6f70 | 403 | |
0f113f3e MC |
404 | return len; |
405 | } | |
5f3d6f70 BM |
406 | |
407 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
408 | { |
409 | return group->seed; | |
410 | } | |
5f3d6f70 BM |
411 | |
412 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
413 | { |
414 | return group->seed_len; | |
415 | } | |
416 | ||
417 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
418 | const BIGNUM *b, BN_CTX *ctx) | |
419 | { | |
420 | if (group->meth->group_set_curve == 0) { | |
421 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
422 | return 0; | |
423 | } | |
424 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
425 | } | |
426 | ||
427 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
428 | BIGNUM *b, BN_CTX *ctx) | |
429 | { | |
430 | if (group->meth->group_get_curve == 0) { | |
431 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
432 | return 0; | |
433 | } | |
434 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
435 | } | |
7793f30e | 436 | |
b3310161 | 437 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
438 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
439 | const BIGNUM *b, BN_CTX *ctx) | |
440 | { | |
441 | if (group->meth->group_set_curve == 0) { | |
442 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
443 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
444 | return 0; | |
445 | } | |
446 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
447 | } | |
448 | ||
449 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
450 | BIGNUM *b, BN_CTX *ctx) | |
451 | { | |
452 | if (group->meth->group_get_curve == 0) { | |
453 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
454 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
455 | return 0; | |
456 | } | |
457 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
458 | } | |
b3310161 | 459 | #endif |
7793f30e BM |
460 | |
461 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
462 | { |
463 | if (group->meth->group_get_degree == 0) { | |
464 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
465 | return 0; | |
466 | } | |
467 | return group->meth->group_get_degree(group); | |
468 | } | |
48fe4d62 | 469 | |
17d6bb81 | 470 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
471 | { |
472 | if (group->meth->group_check_discriminant == 0) { | |
473 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
474 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
475 | return 0; | |
476 | } | |
477 | return group->meth->group_check_discriminant(group, ctx); | |
478 | } | |
af28dd6c | 479 | |
ada0e717 | 480 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
481 | { |
482 | int r = 0; | |
483 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
484 | BN_CTX *ctx_new = NULL; | |
485 | ||
486 | /* compare the field types */ | |
487 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
488 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
489 | return 1; | |
490 | /* compare the curve name (if present in both) */ | |
491 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
492 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
493 | return 1; | |
6903e2e7 DSH |
494 | if (a->meth->flags & EC_FLAGS_CUSTOM_CURVE) |
495 | return 0; | |
0f113f3e | 496 | |
90945fa3 | 497 | if (ctx == NULL) |
0f113f3e | 498 | ctx_new = ctx = BN_CTX_new(); |
90945fa3 | 499 | if (ctx == NULL) |
0f113f3e MC |
500 | return -1; |
501 | ||
502 | BN_CTX_start(ctx); | |
503 | a1 = BN_CTX_get(ctx); | |
504 | a2 = BN_CTX_get(ctx); | |
505 | a3 = BN_CTX_get(ctx); | |
506 | b1 = BN_CTX_get(ctx); | |
507 | b2 = BN_CTX_get(ctx); | |
508 | b3 = BN_CTX_get(ctx); | |
90945fa3 | 509 | if (b3 == NULL) { |
0f113f3e | 510 | BN_CTX_end(ctx); |
23a1d5e9 | 511 | BN_CTX_free(ctx_new); |
0f113f3e MC |
512 | return -1; |
513 | } | |
514 | ||
515 | /* | |
516 | * XXX This approach assumes that the external representation of curves | |
517 | * over the same field type is the same. | |
518 | */ | |
519 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
520 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
521 | r = 1; | |
522 | ||
523 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
524 | r = 1; | |
525 | ||
526 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
527 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
528 | EC_GROUP_get0_generator(b), ctx)) | |
529 | r = 1; | |
530 | ||
531 | if (!r) { | |
be2e334f | 532 | const BIGNUM *ao, *bo, *ac, *bc; |
0f113f3e | 533 | /* compare the order and cofactor */ |
be2e334f DSH |
534 | ao = EC_GROUP_get0_order(a); |
535 | bo = EC_GROUP_get0_order(b); | |
536 | ac = EC_GROUP_get0_cofactor(a); | |
537 | bc = EC_GROUP_get0_cofactor(b); | |
538 | if (ao == NULL || bo == NULL) { | |
0f113f3e | 539 | BN_CTX_end(ctx); |
23a1d5e9 | 540 | BN_CTX_free(ctx_new); |
0f113f3e MC |
541 | return -1; |
542 | } | |
be2e334f | 543 | if (BN_cmp(ao, bo) || BN_cmp(ac, bc)) |
0f113f3e MC |
544 | r = 1; |
545 | } | |
546 | ||
547 | BN_CTX_end(ctx); | |
23a1d5e9 | 548 | BN_CTX_free(ctx_new); |
ada0e717 | 549 | |
0f113f3e MC |
550 | return r; |
551 | } | |
ada0e717 | 552 | |
0657bf9c BM |
553 | /* functions for EC_POINT objects */ |
554 | ||
555 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
556 | { |
557 | EC_POINT *ret; | |
558 | ||
559 | if (group == NULL) { | |
560 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
561 | return NULL; | |
562 | } | |
f06080cb | 563 | if (group->meth->point_init == NULL) { |
0f113f3e MC |
564 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
565 | return NULL; | |
566 | } | |
567 | ||
1b4cf96f | 568 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
569 | if (ret == NULL) { |
570 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
571 | return NULL; | |
572 | } | |
573 | ||
574 | ret->meth = group->meth; | |
575 | ||
576 | if (!ret->meth->point_init(ret)) { | |
577 | OPENSSL_free(ret); | |
578 | return NULL; | |
579 | } | |
580 | ||
581 | return ret; | |
582 | } | |
0657bf9c BM |
583 | |
584 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
585 | { |
586 | if (!point) | |
587 | return; | |
7711de24 | 588 | |
0f113f3e MC |
589 | if (point->meth->point_finish != 0) |
590 | point->meth->point_finish(point); | |
591 | OPENSSL_free(point); | |
592 | } | |
0657bf9c BM |
593 | |
594 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
595 | { |
596 | if (!point) | |
597 | return; | |
598 | ||
599 | if (point->meth->point_clear_finish != 0) | |
600 | point->meth->point_clear_finish(point); | |
601 | else if (point->meth->point_finish != 0) | |
602 | point->meth->point_finish(point); | |
b4faea50 | 603 | OPENSSL_clear_free(point, sizeof(*point)); |
0f113f3e | 604 | } |
0657bf9c BM |
605 | |
606 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
607 | { |
608 | if (dest->meth->point_copy == 0) { | |
609 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
610 | return 0; | |
611 | } | |
612 | if (dest->meth != src->meth) { | |
613 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
614 | return 0; | |
615 | } | |
616 | if (dest == src) | |
617 | return 1; | |
618 | return dest->meth->point_copy(dest, src); | |
619 | } | |
0657bf9c | 620 | |
7793f30e | 621 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
622 | { |
623 | EC_POINT *t; | |
624 | int r; | |
625 | ||
626 | if (a == NULL) | |
627 | return NULL; | |
628 | ||
629 | t = EC_POINT_new(group); | |
630 | if (t == NULL) | |
26a7d938 | 631 | return NULL; |
0f113f3e MC |
632 | r = EC_POINT_copy(t, a); |
633 | if (!r) { | |
634 | EC_POINT_free(t); | |
635 | return NULL; | |
8fdc3734 RS |
636 | } |
637 | return t; | |
0f113f3e | 638 | } |
7793f30e | 639 | |
48fe4d62 | 640 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
641 | { |
642 | return point->meth; | |
643 | } | |
48fe4d62 | 644 | |
226cc7de | 645 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
646 | { |
647 | if (group->meth->point_set_to_infinity == 0) { | |
648 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
649 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
650 | return 0; | |
651 | } | |
652 | if (group->meth != point->meth) { | |
653 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
654 | return 0; | |
655 | } | |
656 | return group->meth->point_set_to_infinity(group, point); | |
657 | } | |
658 | ||
659 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
660 | EC_POINT *point, const BIGNUM *x, | |
661 | const BIGNUM *y, const BIGNUM *z, | |
662 | BN_CTX *ctx) | |
663 | { | |
664 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
665 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
666 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
667 | return 0; | |
668 | } | |
669 | if (group->meth != point->meth) { | |
670 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
671 | EC_R_INCOMPATIBLE_OBJECTS); | |
672 | return 0; | |
673 | } | |
674 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
675 | y, z, ctx); | |
676 | } | |
677 | ||
678 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
679 | const EC_POINT *point, BIGNUM *x, | |
680 | BIGNUM *y, BIGNUM *z, | |
681 | BN_CTX *ctx) | |
682 | { | |
683 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
684 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
685 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
686 | return 0; | |
687 | } | |
688 | if (group->meth != point->meth) { | |
689 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
690 | EC_R_INCOMPATIBLE_OBJECTS); | |
691 | return 0; | |
692 | } | |
693 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
694 | y, z, ctx); | |
695 | } | |
696 | ||
697 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
698 | EC_POINT *point, const BIGNUM *x, | |
699 | const BIGNUM *y, BN_CTX *ctx) | |
700 | { | |
701 | if (group->meth->point_set_affine_coordinates == 0) { | |
702 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
703 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
704 | return 0; | |
705 | } | |
706 | if (group->meth != point->meth) { | |
707 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
708 | EC_R_INCOMPATIBLE_OBJECTS); | |
709 | return 0; | |
710 | } | |
1e2012b7 EK |
711 | if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx)) |
712 | return 0; | |
713 | ||
714 | if (EC_POINT_is_on_curve(group, point, ctx) <= 0) { | |
715 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
716 | EC_R_POINT_IS_NOT_ON_CURVE); | |
717 | return 0; | |
718 | } | |
719 | return 1; | |
0f113f3e | 720 | } |
226cc7de | 721 | |
b3310161 | 722 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
723 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
724 | EC_POINT *point, const BIGNUM *x, | |
725 | const BIGNUM *y, BN_CTX *ctx) | |
726 | { | |
727 | if (group->meth->point_set_affine_coordinates == 0) { | |
728 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
729 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
730 | return 0; | |
731 | } | |
732 | if (group->meth != point->meth) { | |
733 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
734 | EC_R_INCOMPATIBLE_OBJECTS); | |
735 | return 0; | |
736 | } | |
1e2012b7 EK |
737 | if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx)) |
738 | return 0; | |
739 | ||
740 | if (EC_POINT_is_on_curve(group, point, ctx) <= 0) { | |
741 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
742 | EC_R_POINT_IS_NOT_ON_CURVE); | |
743 | return 0; | |
744 | } | |
745 | return 1; | |
0f113f3e | 746 | } |
b3310161 | 747 | #endif |
7793f30e | 748 | |
0f113f3e MC |
749 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
750 | const EC_POINT *point, BIGNUM *x, | |
751 | BIGNUM *y, BN_CTX *ctx) | |
752 | { | |
753 | if (group->meth->point_get_affine_coordinates == 0) { | |
754 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
755 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
756 | return 0; | |
757 | } | |
758 | if (group->meth != point->meth) { | |
759 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
760 | EC_R_INCOMPATIBLE_OBJECTS); | |
761 | return 0; | |
762 | } | |
763 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
764 | } | |
7793f30e | 765 | |
b3310161 | 766 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
767 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
768 | const EC_POINT *point, BIGNUM *x, | |
769 | BIGNUM *y, BN_CTX *ctx) | |
770 | { | |
771 | if (group->meth->point_get_affine_coordinates == 0) { | |
772 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
773 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
774 | return 0; | |
775 | } | |
776 | if (group->meth != point->meth) { | |
777 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
778 | EC_R_INCOMPATIBLE_OBJECTS); | |
779 | return 0; | |
780 | } | |
781 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
782 | } | |
b3310161 | 783 | #endif |
7793f30e | 784 | |
0f113f3e MC |
785 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
786 | const EC_POINT *b, BN_CTX *ctx) | |
787 | { | |
788 | if (group->meth->add == 0) { | |
789 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
790 | return 0; | |
791 | } | |
792 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
793 | || (a->meth != b->meth)) { | |
794 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
795 | return 0; | |
796 | } | |
797 | return group->meth->add(group, r, a, b, ctx); | |
798 | } | |
799 | ||
800 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
801 | BN_CTX *ctx) | |
802 | { | |
803 | if (group->meth->dbl == 0) { | |
804 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
805 | return 0; | |
806 | } | |
807 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
808 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
809 | return 0; | |
810 | } | |
811 | return group->meth->dbl(group, r, a, ctx); | |
812 | } | |
0657bf9c | 813 | |
1d5bd6cf | 814 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
815 | { |
816 | if (group->meth->invert == 0) { | |
817 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
818 | return 0; | |
819 | } | |
820 | if (group->meth != a->meth) { | |
821 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
822 | return 0; | |
823 | } | |
824 | return group->meth->invert(group, a, ctx); | |
825 | } | |
1d5bd6cf | 826 | |
0657bf9c | 827 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
828 | { |
829 | if (group->meth->is_at_infinity == 0) { | |
830 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
831 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
832 | return 0; | |
833 | } | |
834 | if (group->meth != point->meth) { | |
835 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
836 | return 0; | |
837 | } | |
838 | return group->meth->is_at_infinity(group, point); | |
839 | } | |
840 | ||
68886be7 MC |
841 | /* |
842 | * Check whether an EC_POINT is on the curve or not. Note that the return | |
843 | * value for this function should NOT be treated as a boolean. Return values: | |
844 | * 1: The point is on the curve | |
845 | * 0: The point is not on the curve | |
846 | * -1: An error occurred | |
847 | */ | |
0f113f3e MC |
848 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
849 | BN_CTX *ctx) | |
850 | { | |
851 | if (group->meth->is_on_curve == 0) { | |
852 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
853 | return 0; | |
854 | } | |
855 | if (group->meth != point->meth) { | |
856 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
857 | return 0; | |
858 | } | |
859 | return group->meth->is_on_curve(group, point, ctx); | |
860 | } | |
861 | ||
862 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
863 | BN_CTX *ctx) | |
864 | { | |
865 | if (group->meth->point_cmp == 0) { | |
866 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
867 | return -1; | |
868 | } | |
869 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
870 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
871 | return -1; | |
872 | } | |
873 | return group->meth->point_cmp(group, a, b, ctx); | |
874 | } | |
1d5bd6cf | 875 | |
e869d4bd | 876 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
877 | { |
878 | if (group->meth->make_affine == 0) { | |
879 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
880 | return 0; | |
881 | } | |
882 | if (group->meth != point->meth) { | |
883 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
884 | return 0; | |
885 | } | |
886 | return group->meth->make_affine(group, point, ctx); | |
887 | } | |
888 | ||
889 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
890 | EC_POINT *points[], BN_CTX *ctx) | |
891 | { | |
892 | size_t i; | |
893 | ||
894 | if (group->meth->points_make_affine == 0) { | |
895 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
896 | return 0; | |
897 | } | |
898 | for (i = 0; i < num; i++) { | |
899 | if (group->meth != points[i]->meth) { | |
900 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
901 | return 0; | |
902 | } | |
903 | } | |
904 | return group->meth->points_make_affine(group, num, points, ctx); | |
905 | } | |
906 | ||
907 | /* | |
908 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
909 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
910 | * methods. | |
37c660ff BM |
911 | */ |
912 | ||
913 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
914 | size_t num, const EC_POINT *points[], |
915 | const BIGNUM *scalars[], BN_CTX *ctx) | |
916 | { | |
917 | if (group->meth->mul == 0) | |
918 | /* use default */ | |
919 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 920 | |
0f113f3e MC |
921 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
922 | } | |
37c660ff BM |
923 | |
924 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
925 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
926 | { | |
927 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 928 | |
0f113f3e MC |
929 | const EC_POINT *points[1]; |
930 | const BIGNUM *scalars[1]; | |
37c660ff | 931 | |
0f113f3e MC |
932 | points[0] = point; |
933 | scalars[0] = p_scalar; | |
37c660ff | 934 | |
0f113f3e MC |
935 | return EC_POINTs_mul(group, r, g_scalar, |
936 | (point != NULL | |
937 | && p_scalar != NULL), points, scalars, ctx); | |
938 | } | |
37c660ff BM |
939 | |
940 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
941 | { |
942 | if (group->meth->mul == 0) | |
943 | /* use default */ | |
944 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 945 | |
0f113f3e MC |
946 | if (group->meth->precompute_mult != 0) |
947 | return group->meth->precompute_mult(group, ctx); | |
948 | else | |
949 | return 1; /* nothing to do, so report success */ | |
950 | } | |
37c660ff BM |
951 | |
952 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
953 | { |
954 | if (group->meth->mul == 0) | |
955 | /* use default */ | |
956 | return ec_wNAF_have_precompute_mult(group); | |
957 | ||
958 | if (group->meth->have_precompute_mult != 0) | |
959 | return group->meth->have_precompute_mult(group); | |
960 | else | |
961 | return 0; /* cannot tell whether precomputation has | |
962 | * been performed */ | |
963 | } | |
964 | ||
965 | /* | |
966 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
967 | * returns one on success. On error it returns zero. | |
968 | */ | |
eb791696 | 969 | static int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
970 | { |
971 | BN_CTX *ctx = BN_CTX_new(); | |
972 | int ret = 0; | |
973 | ||
23a1d5e9 RS |
974 | BN_MONT_CTX_free(group->mont_data); |
975 | group->mont_data = NULL; | |
0f113f3e MC |
976 | |
977 | if (ctx == NULL) | |
978 | goto err; | |
979 | ||
980 | group->mont_data = BN_MONT_CTX_new(); | |
90945fa3 | 981 | if (group->mont_data == NULL) |
0f113f3e MC |
982 | goto err; |
983 | ||
984 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
985 | BN_MONT_CTX_free(group->mont_data); | |
986 | group->mont_data = NULL; | |
987 | goto err; | |
988 | } | |
989 | ||
990 | ret = 1; | |
991 | ||
992 | err: | |
993 | ||
23a1d5e9 | 994 | BN_CTX_free(ctx); |
0f113f3e MC |
995 | return ret; |
996 | } | |
3aef36ff RS |
997 | |
998 | int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg) | |
999 | { | |
1000 | return CRYPTO_set_ex_data(&key->ex_data, idx, arg); | |
1001 | } | |
1002 | ||
1003 | void *EC_KEY_get_ex_data(const EC_KEY *key, int idx) | |
1004 | { | |
1005 | return CRYPTO_get_ex_data(&key->ex_data, idx); | |
1006 | } | |
77470e98 DSH |
1007 | |
1008 | int ec_group_simple_order_bits(const EC_GROUP *group) | |
1009 | { | |
1010 | if (group->order == NULL) | |
1011 | return 0; | |
1012 | return BN_num_bits(group->order); | |
1013 | } | |
eb791696 AP |
1014 | |
1015 | int EC_GROUP_do_inverse_ord(const EC_GROUP *group, BIGNUM *res, | |
1016 | BIGNUM *x, BN_CTX *ctx) | |
1017 | { | |
1018 | if (group->meth->field_inverse_mod_ord != NULL) | |
1019 | return group->meth->field_inverse_mod_ord(group, res, x, ctx); | |
1020 | else | |
1021 | return 0; | |
1022 | } |