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65e81670 | 1 | /* crypto/ec/ec_lib.c */ |
35b73a1f BM |
2 | /* |
3 | * Originally written by Bodo Moeller for the OpenSSL project. | |
4 | */ | |
65e81670 | 5 | /* ==================================================================== |
37c660ff | 6 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
65e81670 BM |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
65e81670 BM |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * openssl-core@openssl.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
7793f30e BM |
58 | /* ==================================================================== |
59 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
0f113f3e | 60 | * Binary polynomial ECC support in OpenSSL originally developed by |
7793f30e BM |
61 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
62 | */ | |
65e81670 | 63 | |
c4b36ff4 BM |
64 | #include <string.h> |
65 | ||
0657bf9c | 66 | #include <openssl/err.h> |
bb62a8b0 | 67 | #include <openssl/opensslv.h> |
0657bf9c | 68 | |
65e81670 | 69 | #include "ec_lcl.h" |
0657bf9c | 70 | |
0657bf9c BM |
71 | /* functions for EC_GROUP objects */ |
72 | ||
73 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) | |
0f113f3e MC |
74 | { |
75 | EC_GROUP *ret; | |
76 | ||
77 | if (meth == NULL) { | |
78 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); | |
79 | return NULL; | |
80 | } | |
81 | if (meth->group_init == 0) { | |
82 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
83 | return NULL; | |
84 | } | |
85 | ||
64b25758 | 86 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
87 | if (ret == NULL) { |
88 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | ret->meth = meth; | |
0f113f3e | 93 | ret->order = BN_new(); |
90945fa3 | 94 | if (ret->order == NULL) |
0f113f3e MC |
95 | goto err; |
96 | ret->cofactor = BN_new(); | |
90945fa3 | 97 | if (ret->cofactor == NULL) |
0f113f3e | 98 | goto err; |
86f300d3 | 99 | ret->asn1_flag = OPENSSL_EC_NAMED_CURVE; |
0f113f3e | 100 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
0f113f3e MC |
101 | if (!meth->group_init(ret)) |
102 | goto err; | |
0f113f3e | 103 | return ret; |
64b25758 | 104 | |
0f113f3e | 105 | err: |
23a1d5e9 RS |
106 | BN_free(ret->order); |
107 | BN_free(ret->cofactor); | |
0f113f3e MC |
108 | OPENSSL_free(ret); |
109 | return NULL; | |
110 | } | |
0657bf9c | 111 | |
3aef36ff RS |
112 | static void ec_group_free_precomp(EC_GROUP *group) |
113 | { | |
114 | switch (group->pre_comp_type) { | |
115 | default: | |
116 | break; | |
117 | case pct_nistz256: | |
118 | EC_nistz256_pre_comp_free(group->pre_comp.nistz256); | |
119 | break; | |
120 | #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 | |
121 | case pct_nistp224: | |
122 | EC_nistp224_pre_comp_free(group->pre_comp.nistp224); | |
123 | break; | |
124 | case pct_nistp256: | |
125 | EC_nistp256_pre_comp_free(group->pre_comp.nistp256); | |
126 | break; | |
127 | case pct_nistp521: | |
128 | EC_nistp521_pre_comp_free(group->pre_comp.nistp521); | |
129 | break; | |
130 | #endif | |
131 | case pct_ec: | |
132 | EC_ec_pre_comp_free(group->pre_comp.ec); | |
133 | break; | |
134 | } | |
135 | group->pre_comp.ec = NULL; | |
136 | } | |
137 | ||
0657bf9c | 138 | void EC_GROUP_free(EC_GROUP *group) |
0f113f3e MC |
139 | { |
140 | if (!group) | |
141 | return; | |
7711de24 | 142 | |
0f113f3e MC |
143 | if (group->meth->group_finish != 0) |
144 | group->meth->group_finish(group); | |
df9cc153 | 145 | |
3aef36ff | 146 | ec_group_free_precomp(group); |
23a1d5e9 | 147 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 148 | EC_POINT_free(group->generator); |
0f113f3e MC |
149 | BN_free(group->order); |
150 | BN_free(group->cofactor); | |
25aaa98a | 151 | OPENSSL_free(group->seed); |
0f113f3e MC |
152 | OPENSSL_free(group); |
153 | } | |
0657bf9c BM |
154 | |
155 | void EC_GROUP_clear_free(EC_GROUP *group) | |
0f113f3e MC |
156 | { |
157 | if (!group) | |
158 | return; | |
df9cc153 | 159 | |
0f113f3e MC |
160 | if (group->meth->group_clear_finish != 0) |
161 | group->meth->group_clear_finish(group); | |
162 | else if (group->meth->group_finish != 0) | |
163 | group->meth->group_finish(group); | |
df9cc153 | 164 | |
3aef36ff | 165 | ec_group_free_precomp(group); |
23a1d5e9 | 166 | BN_MONT_CTX_free(group->mont_data); |
8fdc3734 | 167 | EC_POINT_clear_free(group->generator); |
0f113f3e MC |
168 | BN_clear_free(group->order); |
169 | BN_clear_free(group->cofactor); | |
4b45c6e5 | 170 | OPENSSL_clear_free(group->seed, group->seed_len); |
b4faea50 | 171 | OPENSSL_clear_free(group, sizeof(*group)); |
0f113f3e | 172 | } |
0657bf9c BM |
173 | |
174 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) | |
0f113f3e | 175 | { |
0f113f3e MC |
176 | if (dest->meth->group_copy == 0) { |
177 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
178 | return 0; | |
179 | } | |
180 | if (dest->meth != src->meth) { | |
181 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
182 | return 0; | |
183 | } | |
184 | if (dest == src) | |
185 | return 1; | |
186 | ||
3aef36ff RS |
187 | /* Copy precomputed */ |
188 | dest->pre_comp_type = src->pre_comp_type; | |
189 | switch (src->pre_comp_type) { | |
190 | default: | |
191 | dest->pre_comp.ec = NULL; | |
192 | break; | |
193 | case pct_nistz256: | |
194 | dest->pre_comp.nistz256 = EC_nistz256_pre_comp_dup(src->pre_comp.nistz256); | |
195 | break; | |
196 | #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 | |
197 | case pct_nistp224: | |
198 | dest->pre_comp.nistp224 = EC_nistp224_pre_comp_dup(src->pre_comp.nistp224); | |
199 | break; | |
200 | case pct_nistp256: | |
201 | dest->pre_comp.nistp256 = EC_nistp256_pre_comp_dup(src->pre_comp.nistp256); | |
202 | break; | |
203 | case pct_nistp521: | |
204 | dest->pre_comp.nistp521 = EC_nistp521_pre_comp_dup(src->pre_comp.nistp521); | |
205 | break; | |
206 | #endif | |
207 | case pct_ec: | |
208 | dest->pre_comp.ec = EC_ec_pre_comp_dup(src->pre_comp.ec); | |
209 | break; | |
0f113f3e MC |
210 | } |
211 | ||
212 | if (src->mont_data != NULL) { | |
213 | if (dest->mont_data == NULL) { | |
214 | dest->mont_data = BN_MONT_CTX_new(); | |
215 | if (dest->mont_data == NULL) | |
216 | return 0; | |
217 | } | |
218 | if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) | |
219 | return 0; | |
220 | } else { | |
221 | /* src->generator == NULL */ | |
23a1d5e9 RS |
222 | BN_MONT_CTX_free(dest->mont_data); |
223 | dest->mont_data = NULL; | |
0f113f3e | 224 | } |
0657bf9c | 225 | |
0f113f3e MC |
226 | if (src->generator != NULL) { |
227 | if (dest->generator == NULL) { | |
228 | dest->generator = EC_POINT_new(dest); | |
229 | if (dest->generator == NULL) | |
230 | return 0; | |
231 | } | |
232 | if (!EC_POINT_copy(dest->generator, src->generator)) | |
233 | return 0; | |
234 | } else { | |
235 | /* src->generator == NULL */ | |
8fdc3734 RS |
236 | EC_POINT_clear_free(dest->generator); |
237 | dest->generator = NULL; | |
0f113f3e MC |
238 | } |
239 | ||
240 | if (!BN_copy(dest->order, src->order)) | |
241 | return 0; | |
242 | if (!BN_copy(dest->cofactor, src->cofactor)) | |
243 | return 0; | |
244 | ||
245 | dest->curve_name = src->curve_name; | |
246 | dest->asn1_flag = src->asn1_flag; | |
247 | dest->asn1_form = src->asn1_form; | |
248 | ||
249 | if (src->seed) { | |
b548a1f1 | 250 | OPENSSL_free(dest->seed); |
0f113f3e MC |
251 | dest->seed = OPENSSL_malloc(src->seed_len); |
252 | if (dest->seed == NULL) | |
253 | return 0; | |
254 | if (!memcpy(dest->seed, src->seed, src->seed_len)) | |
255 | return 0; | |
256 | dest->seed_len = src->seed_len; | |
257 | } else { | |
b548a1f1 | 258 | OPENSSL_free(dest->seed); |
0f113f3e MC |
259 | dest->seed = NULL; |
260 | dest->seed_len = 0; | |
261 | } | |
262 | ||
263 | return dest->meth->group_copy(dest, src); | |
264 | } | |
0657bf9c | 265 | |
7793f30e | 266 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
0f113f3e MC |
267 | { |
268 | EC_GROUP *t = NULL; | |
269 | int ok = 0; | |
7793f30e | 270 | |
0f113f3e MC |
271 | if (a == NULL) |
272 | return NULL; | |
7793f30e | 273 | |
0f113f3e MC |
274 | if ((t = EC_GROUP_new(a->meth)) == NULL) |
275 | return (NULL); | |
276 | if (!EC_GROUP_copy(t, a)) | |
277 | goto err; | |
7793f30e | 278 | |
0f113f3e | 279 | ok = 1; |
7793f30e | 280 | |
0f113f3e MC |
281 | err: |
282 | if (!ok) { | |
8fdc3734 | 283 | EC_GROUP_free(t); |
0f113f3e | 284 | return NULL; |
8fdc3734 | 285 | } |
0f113f3e MC |
286 | return t; |
287 | } | |
7793f30e | 288 | |
48fe4d62 | 289 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
0f113f3e MC |
290 | { |
291 | return group->meth; | |
292 | } | |
48fe4d62 | 293 | |
458c2917 | 294 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
0f113f3e MC |
295 | { |
296 | return meth->field_type; | |
297 | } | |
298 | ||
299 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, | |
300 | const BIGNUM *order, const BIGNUM *cofactor) | |
301 | { | |
302 | if (generator == NULL) { | |
303 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | if (group->generator == NULL) { | |
308 | group->generator = EC_POINT_new(group); | |
309 | if (group->generator == NULL) | |
310 | return 0; | |
311 | } | |
312 | if (!EC_POINT_copy(group->generator, generator)) | |
313 | return 0; | |
314 | ||
315 | if (order != NULL) { | |
316 | if (!BN_copy(group->order, order)) | |
317 | return 0; | |
318 | } else | |
319 | BN_zero(group->order); | |
320 | ||
321 | if (cofactor != NULL) { | |
322 | if (!BN_copy(group->cofactor, cofactor)) | |
323 | return 0; | |
324 | } else | |
325 | BN_zero(group->cofactor); | |
326 | ||
327 | /* | |
328 | * We ignore the return value because some groups have an order with | |
329 | * factors of two, which makes the Montgomery setup fail. | |
330 | * |group->mont_data| will be NULL in this case. | |
331 | */ | |
332 | ec_precompute_mont_data(group); | |
333 | ||
334 | return 1; | |
335 | } | |
bb62a8b0 | 336 | |
9dd84053 | 337 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
0f113f3e MC |
338 | { |
339 | return group->generator; | |
340 | } | |
bb62a8b0 | 341 | |
f54be179 | 342 | BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group) |
0f113f3e MC |
343 | { |
344 | return group->mont_data; | |
345 | } | |
bb62a8b0 | 346 | |
b6db386f | 347 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
0f113f3e MC |
348 | { |
349 | if (!BN_copy(order, group->order)) | |
350 | return 0; | |
0657bf9c | 351 | |
0f113f3e MC |
352 | return !BN_is_zero(order); |
353 | } | |
0657bf9c | 354 | |
0f113f3e MC |
355 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
356 | BN_CTX *ctx) | |
357 | { | |
358 | if (!BN_copy(cofactor, group->cofactor)) | |
359 | return 0; | |
48fe4d62 | 360 | |
0f113f3e MC |
361 | return !BN_is_zero(group->cofactor); |
362 | } | |
48fe4d62 | 363 | |
7dc17a6c | 364 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
0f113f3e MC |
365 | { |
366 | group->curve_name = nid; | |
367 | } | |
b6db386f | 368 | |
7dc17a6c | 369 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
0f113f3e MC |
370 | { |
371 | return group->curve_name; | |
372 | } | |
b6db386f | 373 | |
458c2917 | 374 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
0f113f3e MC |
375 | { |
376 | group->asn1_flag = flag; | |
377 | } | |
458c2917 BM |
378 | |
379 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) | |
0f113f3e MC |
380 | { |
381 | return group->asn1_flag; | |
382 | } | |
458c2917 | 383 | |
0f113f3e | 384 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
254ef80d | 385 | point_conversion_form_t form) |
0f113f3e MC |
386 | { |
387 | group->asn1_form = form; | |
388 | } | |
254ef80d | 389 | |
0f113f3e MC |
390 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
391 | *group) | |
392 | { | |
393 | return group->asn1_form; | |
394 | } | |
254ef80d | 395 | |
5f3d6f70 | 396 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
0f113f3e | 397 | { |
b548a1f1 RS |
398 | OPENSSL_free(group->seed); |
399 | group->seed = NULL; | |
400 | group->seed_len = 0; | |
5f3d6f70 | 401 | |
0f113f3e MC |
402 | if (!len || !p) |
403 | return 1; | |
5f3d6f70 | 404 | |
0f113f3e MC |
405 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
406 | return 0; | |
407 | memcpy(group->seed, p, len); | |
408 | group->seed_len = len; | |
5f3d6f70 | 409 | |
0f113f3e MC |
410 | return len; |
411 | } | |
5f3d6f70 BM |
412 | |
413 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) | |
0f113f3e MC |
414 | { |
415 | return group->seed; | |
416 | } | |
5f3d6f70 BM |
417 | |
418 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) | |
0f113f3e MC |
419 | { |
420 | return group->seed_len; | |
421 | } | |
422 | ||
423 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, | |
424 | const BIGNUM *b, BN_CTX *ctx) | |
425 | { | |
426 | if (group->meth->group_set_curve == 0) { | |
427 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
428 | return 0; | |
429 | } | |
430 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
431 | } | |
432 | ||
433 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
434 | BIGNUM *b, BN_CTX *ctx) | |
435 | { | |
436 | if (group->meth->group_get_curve == 0) { | |
437 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
438 | return 0; | |
439 | } | |
440 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
441 | } | |
7793f30e | 442 | |
b3310161 | 443 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
444 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
445 | const BIGNUM *b, BN_CTX *ctx) | |
446 | { | |
447 | if (group->meth->group_set_curve == 0) { | |
448 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, | |
449 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
450 | return 0; | |
451 | } | |
452 | return group->meth->group_set_curve(group, p, a, b, ctx); | |
453 | } | |
454 | ||
455 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, | |
456 | BIGNUM *b, BN_CTX *ctx) | |
457 | { | |
458 | if (group->meth->group_get_curve == 0) { | |
459 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, | |
460 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
461 | return 0; | |
462 | } | |
463 | return group->meth->group_get_curve(group, p, a, b, ctx); | |
464 | } | |
b3310161 | 465 | #endif |
7793f30e BM |
466 | |
467 | int EC_GROUP_get_degree(const EC_GROUP *group) | |
0f113f3e MC |
468 | { |
469 | if (group->meth->group_get_degree == 0) { | |
470 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
471 | return 0; | |
472 | } | |
473 | return group->meth->group_get_degree(group); | |
474 | } | |
48fe4d62 | 475 | |
17d6bb81 | 476 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
0f113f3e MC |
477 | { |
478 | if (group->meth->group_check_discriminant == 0) { | |
479 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, | |
480 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
481 | return 0; | |
482 | } | |
483 | return group->meth->group_check_discriminant(group, ctx); | |
484 | } | |
af28dd6c | 485 | |
ada0e717 | 486 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
0f113f3e MC |
487 | { |
488 | int r = 0; | |
489 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; | |
490 | BN_CTX *ctx_new = NULL; | |
491 | ||
492 | /* compare the field types */ | |
493 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != | |
494 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) | |
495 | return 1; | |
496 | /* compare the curve name (if present in both) */ | |
497 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && | |
498 | EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) | |
499 | return 1; | |
500 | ||
90945fa3 | 501 | if (ctx == NULL) |
0f113f3e | 502 | ctx_new = ctx = BN_CTX_new(); |
90945fa3 | 503 | if (ctx == NULL) |
0f113f3e MC |
504 | return -1; |
505 | ||
506 | BN_CTX_start(ctx); | |
507 | a1 = BN_CTX_get(ctx); | |
508 | a2 = BN_CTX_get(ctx); | |
509 | a3 = BN_CTX_get(ctx); | |
510 | b1 = BN_CTX_get(ctx); | |
511 | b2 = BN_CTX_get(ctx); | |
512 | b3 = BN_CTX_get(ctx); | |
90945fa3 | 513 | if (b3 == NULL) { |
0f113f3e | 514 | BN_CTX_end(ctx); |
23a1d5e9 | 515 | BN_CTX_free(ctx_new); |
0f113f3e MC |
516 | return -1; |
517 | } | |
518 | ||
519 | /* | |
520 | * XXX This approach assumes that the external representation of curves | |
521 | * over the same field type is the same. | |
522 | */ | |
523 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || | |
524 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) | |
525 | r = 1; | |
526 | ||
527 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) | |
528 | r = 1; | |
529 | ||
530 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ | |
531 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), | |
532 | EC_GROUP_get0_generator(b), ctx)) | |
533 | r = 1; | |
534 | ||
535 | if (!r) { | |
536 | /* compare the order and cofactor */ | |
537 | if (!EC_GROUP_get_order(a, a1, ctx) || | |
538 | !EC_GROUP_get_order(b, b1, ctx) || | |
539 | !EC_GROUP_get_cofactor(a, a2, ctx) || | |
540 | !EC_GROUP_get_cofactor(b, b2, ctx)) { | |
541 | BN_CTX_end(ctx); | |
23a1d5e9 | 542 | BN_CTX_free(ctx_new); |
0f113f3e MC |
543 | return -1; |
544 | } | |
545 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) | |
546 | r = 1; | |
547 | } | |
548 | ||
549 | BN_CTX_end(ctx); | |
23a1d5e9 | 550 | BN_CTX_free(ctx_new); |
ada0e717 | 551 | |
0f113f3e MC |
552 | return r; |
553 | } | |
ada0e717 | 554 | |
0657bf9c BM |
555 | /* functions for EC_POINT objects */ |
556 | ||
557 | EC_POINT *EC_POINT_new(const EC_GROUP *group) | |
0f113f3e MC |
558 | { |
559 | EC_POINT *ret; | |
560 | ||
561 | if (group == NULL) { | |
562 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); | |
563 | return NULL; | |
564 | } | |
565 | if (group->meth->point_init == 0) { | |
566 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
567 | return NULL; | |
568 | } | |
569 | ||
b4faea50 | 570 | ret = OPENSSL_malloc(sizeof(*ret)); |
0f113f3e MC |
571 | if (ret == NULL) { |
572 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); | |
573 | return NULL; | |
574 | } | |
575 | ||
576 | ret->meth = group->meth; | |
577 | ||
578 | if (!ret->meth->point_init(ret)) { | |
579 | OPENSSL_free(ret); | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | return ret; | |
584 | } | |
0657bf9c BM |
585 | |
586 | void EC_POINT_free(EC_POINT *point) | |
0f113f3e MC |
587 | { |
588 | if (!point) | |
589 | return; | |
7711de24 | 590 | |
0f113f3e MC |
591 | if (point->meth->point_finish != 0) |
592 | point->meth->point_finish(point); | |
593 | OPENSSL_free(point); | |
594 | } | |
0657bf9c BM |
595 | |
596 | void EC_POINT_clear_free(EC_POINT *point) | |
0f113f3e MC |
597 | { |
598 | if (!point) | |
599 | return; | |
600 | ||
601 | if (point->meth->point_clear_finish != 0) | |
602 | point->meth->point_clear_finish(point); | |
603 | else if (point->meth->point_finish != 0) | |
604 | point->meth->point_finish(point); | |
b4faea50 | 605 | OPENSSL_clear_free(point, sizeof(*point)); |
0f113f3e | 606 | } |
0657bf9c BM |
607 | |
608 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) | |
0f113f3e MC |
609 | { |
610 | if (dest->meth->point_copy == 0) { | |
611 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
612 | return 0; | |
613 | } | |
614 | if (dest->meth != src->meth) { | |
615 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); | |
616 | return 0; | |
617 | } | |
618 | if (dest == src) | |
619 | return 1; | |
620 | return dest->meth->point_copy(dest, src); | |
621 | } | |
0657bf9c | 622 | |
7793f30e | 623 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
0f113f3e MC |
624 | { |
625 | EC_POINT *t; | |
626 | int r; | |
627 | ||
628 | if (a == NULL) | |
629 | return NULL; | |
630 | ||
631 | t = EC_POINT_new(group); | |
632 | if (t == NULL) | |
633 | return (NULL); | |
634 | r = EC_POINT_copy(t, a); | |
635 | if (!r) { | |
636 | EC_POINT_free(t); | |
637 | return NULL; | |
8fdc3734 RS |
638 | } |
639 | return t; | |
0f113f3e | 640 | } |
7793f30e | 641 | |
48fe4d62 | 642 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
0f113f3e MC |
643 | { |
644 | return point->meth; | |
645 | } | |
48fe4d62 | 646 | |
226cc7de | 647 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
0f113f3e MC |
648 | { |
649 | if (group->meth->point_set_to_infinity == 0) { | |
650 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, | |
651 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
652 | return 0; | |
653 | } | |
654 | if (group->meth != point->meth) { | |
655 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
656 | return 0; | |
657 | } | |
658 | return group->meth->point_set_to_infinity(group, point); | |
659 | } | |
660 | ||
661 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
662 | EC_POINT *point, const BIGNUM *x, | |
663 | const BIGNUM *y, const BIGNUM *z, | |
664 | BN_CTX *ctx) | |
665 | { | |
666 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { | |
667 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
668 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
669 | return 0; | |
670 | } | |
671 | if (group->meth != point->meth) { | |
672 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, | |
673 | EC_R_INCOMPATIBLE_OBJECTS); | |
674 | return 0; | |
675 | } | |
676 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, | |
677 | y, z, ctx); | |
678 | } | |
679 | ||
680 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, | |
681 | const EC_POINT *point, BIGNUM *x, | |
682 | BIGNUM *y, BIGNUM *z, | |
683 | BN_CTX *ctx) | |
684 | { | |
685 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { | |
686 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
687 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
688 | return 0; | |
689 | } | |
690 | if (group->meth != point->meth) { | |
691 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, | |
692 | EC_R_INCOMPATIBLE_OBJECTS); | |
693 | return 0; | |
694 | } | |
695 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, | |
696 | y, z, ctx); | |
697 | } | |
698 | ||
699 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, | |
700 | EC_POINT *point, const BIGNUM *x, | |
701 | const BIGNUM *y, BN_CTX *ctx) | |
702 | { | |
703 | if (group->meth->point_set_affine_coordinates == 0) { | |
704 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
705 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
706 | return 0; | |
707 | } | |
708 | if (group->meth != point->meth) { | |
709 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, | |
710 | EC_R_INCOMPATIBLE_OBJECTS); | |
711 | return 0; | |
712 | } | |
713 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
714 | } | |
226cc7de | 715 | |
b3310161 | 716 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
717 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
718 | EC_POINT *point, const BIGNUM *x, | |
719 | const BIGNUM *y, BN_CTX *ctx) | |
720 | { | |
721 | if (group->meth->point_set_affine_coordinates == 0) { | |
722 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
723 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
724 | return 0; | |
725 | } | |
726 | if (group->meth != point->meth) { | |
727 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, | |
728 | EC_R_INCOMPATIBLE_OBJECTS); | |
729 | return 0; | |
730 | } | |
731 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); | |
732 | } | |
b3310161 | 733 | #endif |
7793f30e | 734 | |
0f113f3e MC |
735 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
736 | const EC_POINT *point, BIGNUM *x, | |
737 | BIGNUM *y, BN_CTX *ctx) | |
738 | { | |
739 | if (group->meth->point_get_affine_coordinates == 0) { | |
740 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
741 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
742 | return 0; | |
743 | } | |
744 | if (group->meth != point->meth) { | |
745 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, | |
746 | EC_R_INCOMPATIBLE_OBJECTS); | |
747 | return 0; | |
748 | } | |
749 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
750 | } | |
7793f30e | 751 | |
b3310161 | 752 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
753 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
754 | const EC_POINT *point, BIGNUM *x, | |
755 | BIGNUM *y, BN_CTX *ctx) | |
756 | { | |
757 | if (group->meth->point_get_affine_coordinates == 0) { | |
758 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
759 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
760 | return 0; | |
761 | } | |
762 | if (group->meth != point->meth) { | |
763 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, | |
764 | EC_R_INCOMPATIBLE_OBJECTS); | |
765 | return 0; | |
766 | } | |
767 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); | |
768 | } | |
b3310161 | 769 | #endif |
7793f30e | 770 | |
0f113f3e MC |
771 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
772 | const EC_POINT *b, BN_CTX *ctx) | |
773 | { | |
774 | if (group->meth->add == 0) { | |
775 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
776 | return 0; | |
777 | } | |
778 | if ((group->meth != r->meth) || (r->meth != a->meth) | |
779 | || (a->meth != b->meth)) { | |
780 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); | |
781 | return 0; | |
782 | } | |
783 | return group->meth->add(group, r, a, b, ctx); | |
784 | } | |
785 | ||
786 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, | |
787 | BN_CTX *ctx) | |
788 | { | |
789 | if (group->meth->dbl == 0) { | |
790 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
791 | return 0; | |
792 | } | |
793 | if ((group->meth != r->meth) || (r->meth != a->meth)) { | |
794 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); | |
795 | return 0; | |
796 | } | |
797 | return group->meth->dbl(group, r, a, ctx); | |
798 | } | |
0657bf9c | 799 | |
1d5bd6cf | 800 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
0f113f3e MC |
801 | { |
802 | if (group->meth->invert == 0) { | |
803 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
804 | return 0; | |
805 | } | |
806 | if (group->meth != a->meth) { | |
807 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); | |
808 | return 0; | |
809 | } | |
810 | return group->meth->invert(group, a, ctx); | |
811 | } | |
1d5bd6cf | 812 | |
0657bf9c | 813 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
0f113f3e MC |
814 | { |
815 | if (group->meth->is_at_infinity == 0) { | |
816 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, | |
817 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
818 | return 0; | |
819 | } | |
820 | if (group->meth != point->meth) { | |
821 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); | |
822 | return 0; | |
823 | } | |
824 | return group->meth->is_at_infinity(group, point); | |
825 | } | |
826 | ||
68886be7 MC |
827 | /* |
828 | * Check whether an EC_POINT is on the curve or not. Note that the return | |
829 | * value for this function should NOT be treated as a boolean. Return values: | |
830 | * 1: The point is on the curve | |
831 | * 0: The point is not on the curve | |
832 | * -1: An error occurred | |
833 | */ | |
0f113f3e MC |
834 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
835 | BN_CTX *ctx) | |
836 | { | |
837 | if (group->meth->is_on_curve == 0) { | |
838 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
839 | return 0; | |
840 | } | |
841 | if (group->meth != point->meth) { | |
842 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); | |
843 | return 0; | |
844 | } | |
845 | return group->meth->is_on_curve(group, point, ctx); | |
846 | } | |
847 | ||
848 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, | |
849 | BN_CTX *ctx) | |
850 | { | |
851 | if (group->meth->point_cmp == 0) { | |
852 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
853 | return -1; | |
854 | } | |
855 | if ((group->meth != a->meth) || (a->meth != b->meth)) { | |
856 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); | |
857 | return -1; | |
858 | } | |
859 | return group->meth->point_cmp(group, a, b, ctx); | |
860 | } | |
1d5bd6cf | 861 | |
e869d4bd | 862 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
0f113f3e MC |
863 | { |
864 | if (group->meth->make_affine == 0) { | |
865 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
866 | return 0; | |
867 | } | |
868 | if (group->meth != point->meth) { | |
869 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
870 | return 0; | |
871 | } | |
872 | return group->meth->make_affine(group, point, ctx); | |
873 | } | |
874 | ||
875 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, | |
876 | EC_POINT *points[], BN_CTX *ctx) | |
877 | { | |
878 | size_t i; | |
879 | ||
880 | if (group->meth->points_make_affine == 0) { | |
881 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
882 | return 0; | |
883 | } | |
884 | for (i = 0; i < num; i++) { | |
885 | if (group->meth != points[i]->meth) { | |
886 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); | |
887 | return 0; | |
888 | } | |
889 | } | |
890 | return group->meth->points_make_affine(group, num, points, ctx); | |
891 | } | |
892 | ||
893 | /* | |
894 | * Functions for point multiplication. If group->meth->mul is 0, we use the | |
895 | * wNAF-based implementations in ec_mult.c; otherwise we dispatch through | |
896 | * methods. | |
37c660ff BM |
897 | */ |
898 | ||
899 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, | |
0f113f3e MC |
900 | size_t num, const EC_POINT *points[], |
901 | const BIGNUM *scalars[], BN_CTX *ctx) | |
902 | { | |
903 | if (group->meth->mul == 0) | |
904 | /* use default */ | |
905 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); | |
37c660ff | 906 | |
0f113f3e MC |
907 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
908 | } | |
37c660ff BM |
909 | |
910 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, | |
0f113f3e MC |
911 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
912 | { | |
913 | /* just a convenient interface to EC_POINTs_mul() */ | |
37c660ff | 914 | |
0f113f3e MC |
915 | const EC_POINT *points[1]; |
916 | const BIGNUM *scalars[1]; | |
37c660ff | 917 | |
0f113f3e MC |
918 | points[0] = point; |
919 | scalars[0] = p_scalar; | |
37c660ff | 920 | |
0f113f3e MC |
921 | return EC_POINTs_mul(group, r, g_scalar, |
922 | (point != NULL | |
923 | && p_scalar != NULL), points, scalars, ctx); | |
924 | } | |
37c660ff BM |
925 | |
926 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) | |
0f113f3e MC |
927 | { |
928 | if (group->meth->mul == 0) | |
929 | /* use default */ | |
930 | return ec_wNAF_precompute_mult(group, ctx); | |
37c660ff | 931 | |
0f113f3e MC |
932 | if (group->meth->precompute_mult != 0) |
933 | return group->meth->precompute_mult(group, ctx); | |
934 | else | |
935 | return 1; /* nothing to do, so report success */ | |
936 | } | |
37c660ff BM |
937 | |
938 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) | |
0f113f3e MC |
939 | { |
940 | if (group->meth->mul == 0) | |
941 | /* use default */ | |
942 | return ec_wNAF_have_precompute_mult(group); | |
943 | ||
944 | if (group->meth->have_precompute_mult != 0) | |
945 | return group->meth->have_precompute_mult(group); | |
946 | else | |
947 | return 0; /* cannot tell whether precomputation has | |
948 | * been performed */ | |
949 | } | |
950 | ||
951 | /* | |
952 | * ec_precompute_mont_data sets |group->mont_data| from |group->order| and | |
953 | * returns one on success. On error it returns zero. | |
954 | */ | |
f54be179 | 955 | int ec_precompute_mont_data(EC_GROUP *group) |
0f113f3e MC |
956 | { |
957 | BN_CTX *ctx = BN_CTX_new(); | |
958 | int ret = 0; | |
959 | ||
23a1d5e9 RS |
960 | BN_MONT_CTX_free(group->mont_data); |
961 | group->mont_data = NULL; | |
0f113f3e MC |
962 | |
963 | if (ctx == NULL) | |
964 | goto err; | |
965 | ||
966 | group->mont_data = BN_MONT_CTX_new(); | |
90945fa3 | 967 | if (group->mont_data == NULL) |
0f113f3e MC |
968 | goto err; |
969 | ||
970 | if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) { | |
971 | BN_MONT_CTX_free(group->mont_data); | |
972 | group->mont_data = NULL; | |
973 | goto err; | |
974 | } | |
975 | ||
976 | ret = 1; | |
977 | ||
978 | err: | |
979 | ||
23a1d5e9 | 980 | BN_CTX_free(ctx); |
0f113f3e MC |
981 | return ret; |
982 | } | |
3aef36ff RS |
983 | |
984 | int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg) | |
985 | { | |
986 | return CRYPTO_set_ex_data(&key->ex_data, idx, arg); | |
987 | } | |
988 | ||
989 | void *EC_KEY_get_ex_data(const EC_KEY *key, int idx) | |
990 | { | |
991 | return CRYPTO_get_ex_data(&key->ex_data, idx); | |
992 | } |