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Commit | Line | Data |
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14a7cfb3 | 1 | /* |
aa6bb135 | 2 | * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. |
14a7cfb3 | 3 | * |
aa6bb135 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
14a7cfb3 | 8 | */ |
aa6bb135 | 9 | |
e172d60d BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
0f113f3e | 12 | * Portions originally developed by SUN MICROSYSTEMS, INC., and |
e172d60d BM |
13 | * contributed to the OpenSSL project. |
14 | */ | |
14a7cfb3 | 15 | |
984d6c60 | 16 | #include <internal/cryptlib.h> |
5454829a | 17 | #include <string.h> |
14a7cfb3 BM |
18 | #include "ec_lcl.h" |
19 | #include <openssl/err.h> | |
3c27208f | 20 | #include <openssl/engine.h> |
14a7cfb3 BM |
21 | |
22 | EC_KEY *EC_KEY_new(void) | |
0f113f3e | 23 | { |
28572b57 | 24 | return EC_KEY_new_method(NULL); |
0f113f3e | 25 | } |
14a7cfb3 | 26 | |
9dd84053 | 27 | EC_KEY *EC_KEY_new_by_curve_name(int nid) |
0f113f3e MC |
28 | { |
29 | EC_KEY *ret = EC_KEY_new(); | |
30 | if (ret == NULL) | |
31 | return NULL; | |
32 | ret->group = EC_GROUP_new_by_curve_name(nid); | |
33 | if (ret->group == NULL) { | |
34 | EC_KEY_free(ret); | |
35 | return NULL; | |
36 | } | |
91e7bcc2 DSH |
37 | if (ret->meth->set_group != NULL |
38 | && ret->meth->set_group(ret, ret->group) == 0) { | |
3475bc96 DSH |
39 | EC_KEY_free(ret); |
40 | return NULL; | |
41 | } | |
0f113f3e MC |
42 | return ret; |
43 | } | |
14a7cfb3 BM |
44 | |
45 | void EC_KEY_free(EC_KEY *r) | |
0f113f3e MC |
46 | { |
47 | int i; | |
14a7cfb3 | 48 | |
0f113f3e MC |
49 | if (r == NULL) |
50 | return; | |
14a7cfb3 | 51 | |
9b398ef2 | 52 | CRYPTO_atomic_add(&r->references, -1, &i, r->lock); |
f3f1cf84 | 53 | REF_PRINT_COUNT("EC_KEY", r); |
0f113f3e MC |
54 | if (i > 0) |
55 | return; | |
f3f1cf84 | 56 | REF_ASSERT_ISNT(i < 0); |
14a7cfb3 | 57 | |
91e7bcc2 | 58 | if (r->meth->finish != NULL) |
0d6ff6d3 DSH |
59 | r->meth->finish(r); |
60 | ||
51966416 | 61 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 62 | ENGINE_finish(r->engine); |
51966416 DSH |
63 | #endif |
64 | ||
6903e2e7 DSH |
65 | if (r->group && r->group->meth->keyfinish) |
66 | r->group->meth->keyfinish(r); | |
67 | ||
3aef36ff | 68 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data); |
9b398ef2 | 69 | CRYPTO_THREAD_lock_free(r->lock); |
8fdc3734 RS |
70 | EC_GROUP_free(r->group); |
71 | EC_POINT_free(r->pub_key); | |
23a1d5e9 | 72 | BN_clear_free(r->priv_key); |
14a7cfb3 | 73 | |
4b45c6e5 | 74 | OPENSSL_clear_free((void *)r, sizeof(EC_KEY)); |
0f113f3e | 75 | } |
14a7cfb3 | 76 | |
3aef36ff | 77 | EC_KEY *EC_KEY_copy(EC_KEY *dest, EC_KEY *src) |
0f113f3e | 78 | { |
0f113f3e MC |
79 | if (dest == NULL || src == NULL) { |
80 | ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER); | |
81 | return NULL; | |
82 | } | |
ea0392b9 | 83 | if (src->meth != dest->meth) { |
91e7bcc2 | 84 | if (dest->meth->finish != NULL) |
ea0392b9 | 85 | dest->meth->finish(dest); |
6903e2e7 DSH |
86 | if (dest->group && dest->group->meth->keyfinish) |
87 | dest->group->meth->keyfinish(dest); | |
ea0392b9 | 88 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 89 | if (ENGINE_finish(dest->engine) == 0) |
ea0392b9 DSH |
90 | return 0; |
91 | dest->engine = NULL; | |
92 | #endif | |
93 | } | |
0f113f3e | 94 | /* copy the parameters */ |
91e7bcc2 | 95 | if (src->group != NULL) { |
0f113f3e MC |
96 | const EC_METHOD *meth = EC_GROUP_method_of(src->group); |
97 | /* clear the old group */ | |
8fdc3734 | 98 | EC_GROUP_free(dest->group); |
0f113f3e MC |
99 | dest->group = EC_GROUP_new(meth); |
100 | if (dest->group == NULL) | |
101 | return NULL; | |
102 | if (!EC_GROUP_copy(dest->group, src->group)) | |
103 | return NULL; | |
40a8643a MC |
104 | |
105 | /* copy the public key */ | |
106 | if (src->pub_key != NULL) { | |
107 | EC_POINT_free(dest->pub_key); | |
108 | dest->pub_key = EC_POINT_new(src->group); | |
109 | if (dest->pub_key == NULL) | |
110 | return NULL; | |
111 | if (!EC_POINT_copy(dest->pub_key, src->pub_key)) | |
112 | return NULL; | |
113 | } | |
114 | /* copy the private key */ | |
115 | if (src->priv_key != NULL) { | |
116 | if (dest->priv_key == NULL) { | |
117 | dest->priv_key = BN_new(); | |
118 | if (dest->priv_key == NULL) | |
119 | return NULL; | |
120 | } | |
121 | if (!BN_copy(dest->priv_key, src->priv_key)) | |
122 | return NULL; | |
123 | if (src->group->meth->keycopy | |
124 | && src->group->meth->keycopy(dest, src) == 0) | |
0f113f3e MC |
125 | return NULL; |
126 | } | |
0f113f3e | 127 | } |
0f113f3e | 128 | |
6903e2e7 | 129 | |
0f113f3e MC |
130 | /* copy the rest */ |
131 | dest->enc_flag = src->enc_flag; | |
132 | dest->conv_form = src->conv_form; | |
133 | dest->version = src->version; | |
134 | dest->flags = src->flags; | |
3aef36ff RS |
135 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY, |
136 | &dest->ex_data, &src->ex_data)) | |
137 | return NULL; | |
0f113f3e | 138 | |
ea0392b9 DSH |
139 | if (src->meth != dest->meth) { |
140 | #ifndef OPENSSL_NO_ENGINE | |
91e7bcc2 DSH |
141 | if (src->engine != NULL && ENGINE_init(src->engine) == 0) |
142 | return NULL; | |
ea0392b9 DSH |
143 | dest->engine = src->engine; |
144 | #endif | |
145 | dest->meth = src->meth; | |
146 | } | |
147 | ||
91e7bcc2 DSH |
148 | if (src->meth->copy != NULL && src->meth->copy(dest, src) == 0) |
149 | return NULL; | |
ea0392b9 | 150 | |
0f113f3e MC |
151 | return dest; |
152 | } | |
14a7cfb3 | 153 | |
3aef36ff | 154 | EC_KEY *EC_KEY_dup(EC_KEY *ec_key) |
0f113f3e | 155 | { |
ea0392b9 | 156 | EC_KEY *ret = EC_KEY_new_method(ec_key->engine); |
3aef36ff | 157 | |
0f113f3e MC |
158 | if (ret == NULL) |
159 | return NULL; | |
9b398ef2 | 160 | |
0f113f3e MC |
161 | if (EC_KEY_copy(ret, ec_key) == NULL) { |
162 | EC_KEY_free(ret); | |
163 | return NULL; | |
164 | } | |
165 | return ret; | |
166 | } | |
14a7cfb3 | 167 | |
e172d60d | 168 | int EC_KEY_up_ref(EC_KEY *r) |
0f113f3e | 169 | { |
9b398ef2 AG |
170 | int i; |
171 | ||
172 | if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0) | |
173 | return 0; | |
f3f1cf84 RS |
174 | |
175 | REF_PRINT_COUNT("EC_KEY", r); | |
176 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
177 | return ((i > 1) ? 1 : 0); |
178 | } | |
e172d60d | 179 | |
14a7cfb3 | 180 | int EC_KEY_generate_key(EC_KEY *eckey) |
0f113f3e | 181 | { |
91e7bcc2 | 182 | if (eckey == NULL || eckey->group == NULL) { |
0f113f3e MC |
183 | ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER); |
184 | return 0; | |
185 | } | |
91e7bcc2 | 186 | if (eckey->meth->keygen != NULL) |
5a6a1029 DSH |
187 | return eckey->meth->keygen(eckey); |
188 | ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | int ossl_ec_key_gen(EC_KEY *eckey) | |
77470e98 | 193 | { |
9ff9bccc | 194 | OPENSSL_assert(eckey->group->meth->keygen != NULL); |
77470e98 DSH |
195 | return eckey->group->meth->keygen(eckey); |
196 | } | |
197 | ||
198 | int ec_key_simple_generate_key(EC_KEY *eckey) | |
5a6a1029 DSH |
199 | { |
200 | int ok = 0; | |
201 | BN_CTX *ctx = NULL; | |
be2e334f DSH |
202 | BIGNUM *priv_key = NULL; |
203 | const BIGNUM *order = NULL; | |
5a6a1029 | 204 | EC_POINT *pub_key = NULL; |
0f113f3e | 205 | |
0f113f3e MC |
206 | if ((ctx = BN_CTX_new()) == NULL) |
207 | goto err; | |
208 | ||
209 | if (eckey->priv_key == NULL) { | |
210 | priv_key = BN_new(); | |
211 | if (priv_key == NULL) | |
212 | goto err; | |
213 | } else | |
214 | priv_key = eckey->priv_key; | |
215 | ||
be2e334f DSH |
216 | order = EC_GROUP_get0_order(eckey->group); |
217 | if (order == NULL) | |
0f113f3e MC |
218 | goto err; |
219 | ||
220 | do | |
221 | if (!BN_rand_range(priv_key, order)) | |
222 | goto err; | |
223 | while (BN_is_zero(priv_key)) ; | |
224 | ||
225 | if (eckey->pub_key == NULL) { | |
226 | pub_key = EC_POINT_new(eckey->group); | |
227 | if (pub_key == NULL) | |
228 | goto err; | |
229 | } else | |
230 | pub_key = eckey->pub_key; | |
231 | ||
232 | if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx)) | |
233 | goto err; | |
234 | ||
235 | eckey->priv_key = priv_key; | |
236 | eckey->pub_key = pub_key; | |
237 | ||
238 | ok = 1; | |
239 | ||
240 | err: | |
8fdc3734 | 241 | if (eckey->pub_key == NULL) |
0f113f3e | 242 | EC_POINT_free(pub_key); |
23a1d5e9 | 243 | if (eckey->priv_key != priv_key) |
0f113f3e | 244 | BN_free(priv_key); |
23a1d5e9 | 245 | BN_CTX_free(ctx); |
77470e98 DSH |
246 | return ok; |
247 | } | |
248 | ||
249 | int ec_key_simple_generate_public_key(EC_KEY *eckey) | |
250 | { | |
251 | return EC_POINT_mul(eckey->group, eckey->pub_key, eckey->priv_key, NULL, | |
252 | NULL, NULL); | |
0f113f3e | 253 | } |
14a7cfb3 BM |
254 | |
255 | int EC_KEY_check_key(const EC_KEY *eckey) | |
77470e98 DSH |
256 | { |
257 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) { | |
258 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | if (eckey->group->meth->keycheck == NULL) { | |
263 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | return eckey->group->meth->keycheck(eckey); | |
268 | } | |
269 | ||
270 | int ec_key_simple_check_key(const EC_KEY *eckey) | |
0f113f3e MC |
271 | { |
272 | int ok = 0; | |
273 | BN_CTX *ctx = NULL; | |
274 | const BIGNUM *order = NULL; | |
275 | EC_POINT *point = NULL; | |
276 | ||
91e7bcc2 | 277 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) { |
77470e98 | 278 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
279 | return 0; |
280 | } | |
281 | ||
282 | if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) { | |
77470e98 | 283 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_AT_INFINITY); |
0f113f3e MC |
284 | goto err; |
285 | } | |
286 | ||
287 | if ((ctx = BN_CTX_new()) == NULL) | |
288 | goto err; | |
289 | if ((point = EC_POINT_new(eckey->group)) == NULL) | |
290 | goto err; | |
291 | ||
292 | /* testing whether the pub_key is on the elliptic curve */ | |
68886be7 | 293 | if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) { |
77470e98 | 294 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE); |
0f113f3e MC |
295 | goto err; |
296 | } | |
297 | /* testing whether pub_key * order is the point at infinity */ | |
298 | order = eckey->group->order; | |
299 | if (BN_is_zero(order)) { | |
77470e98 | 300 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
301 | goto err; |
302 | } | |
303 | if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) { | |
77470e98 | 304 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB); |
0f113f3e MC |
305 | goto err; |
306 | } | |
307 | if (!EC_POINT_is_at_infinity(eckey->group, point)) { | |
77470e98 | 308 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER); |
0f113f3e MC |
309 | goto err; |
310 | } | |
311 | /* | |
312 | * in case the priv_key is present : check if generator * priv_key == | |
313 | * pub_key | |
314 | */ | |
91e7bcc2 | 315 | if (eckey->priv_key != NULL) { |
0f113f3e | 316 | if (BN_cmp(eckey->priv_key, order) >= 0) { |
77470e98 | 317 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER); |
0f113f3e MC |
318 | goto err; |
319 | } | |
320 | if (!EC_POINT_mul(eckey->group, point, eckey->priv_key, | |
321 | NULL, NULL, ctx)) { | |
77470e98 | 322 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB); |
0f113f3e MC |
323 | goto err; |
324 | } | |
325 | if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) { | |
77470e98 | 326 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY); |
0f113f3e MC |
327 | goto err; |
328 | } | |
329 | } | |
330 | ok = 1; | |
331 | err: | |
23a1d5e9 | 332 | BN_CTX_free(ctx); |
8fdc3734 | 333 | EC_POINT_free(point); |
77470e98 | 334 | return ok; |
0f113f3e MC |
335 | } |
336 | ||
337 | int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, | |
338 | BIGNUM *y) | |
339 | { | |
340 | BN_CTX *ctx = NULL; | |
341 | BIGNUM *tx, *ty; | |
342 | EC_POINT *point = NULL; | |
8d11b7c7 MC |
343 | int ok = 0; |
344 | #ifndef OPENSSL_NO_EC2M | |
345 | int tmp_nid, is_char_two = 0; | |
346 | #endif | |
0f113f3e | 347 | |
91e7bcc2 | 348 | if (key == NULL || key->group == NULL || x == NULL || y == NULL) { |
0f113f3e MC |
349 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, |
350 | ERR_R_PASSED_NULL_PARAMETER); | |
351 | return 0; | |
352 | } | |
353 | ctx = BN_CTX_new(); | |
90945fa3 | 354 | if (ctx == NULL) |
2ab851b7 | 355 | return 0; |
0f113f3e | 356 | |
2ab851b7 | 357 | BN_CTX_start(ctx); |
0f113f3e MC |
358 | point = EC_POINT_new(key->group); |
359 | ||
90945fa3 | 360 | if (point == NULL) |
0f113f3e MC |
361 | goto err; |
362 | ||
8d11b7c7 MC |
363 | tx = BN_CTX_get(ctx); |
364 | ty = BN_CTX_get(ctx); | |
dd67493c BB |
365 | if (ty == NULL) |
366 | goto err; | |
8d11b7c7 MC |
367 | |
368 | #ifndef OPENSSL_NO_EC2M | |
0f113f3e MC |
369 | tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group)); |
370 | ||
371 | if (tmp_nid == NID_X9_62_characteristic_two_field) | |
372 | is_char_two = 1; | |
373 | ||
0f113f3e MC |
374 | if (is_char_two) { |
375 | if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point, | |
376 | x, y, ctx)) | |
377 | goto err; | |
378 | if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point, | |
379 | tx, ty, ctx)) | |
380 | goto err; | |
381 | } else | |
b3310161 | 382 | #endif |
0f113f3e MC |
383 | { |
384 | if (!EC_POINT_set_affine_coordinates_GFp(key->group, point, | |
385 | x, y, ctx)) | |
386 | goto err; | |
387 | if (!EC_POINT_get_affine_coordinates_GFp(key->group, point, | |
388 | tx, ty, ctx)) | |
389 | goto err; | |
390 | } | |
391 | /* | |
392 | * Check if retrieved coordinates match originals and are less than field | |
393 | * order: if not values are out of range. | |
394 | */ | |
395 | if (BN_cmp(x, tx) || BN_cmp(y, ty) | |
396 | || (BN_cmp(x, key->group->field) >= 0) | |
397 | || (BN_cmp(y, key->group->field) >= 0)) { | |
398 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, | |
399 | EC_R_COORDINATES_OUT_OF_RANGE); | |
400 | goto err; | |
401 | } | |
402 | ||
403 | if (!EC_KEY_set_public_key(key, point)) | |
404 | goto err; | |
405 | ||
406 | if (EC_KEY_check_key(key) == 0) | |
407 | goto err; | |
408 | ||
409 | ok = 1; | |
410 | ||
411 | err: | |
2ab851b7 | 412 | BN_CTX_end(ctx); |
23a1d5e9 | 413 | BN_CTX_free(ctx); |
8fdc3734 | 414 | EC_POINT_free(point); |
0f113f3e MC |
415 | return ok; |
416 | ||
417 | } | |
fef1c40b | 418 | |
9dd84053 | 419 | const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key) |
0f113f3e MC |
420 | { |
421 | return key->group; | |
422 | } | |
9dd84053 NL |
423 | |
424 | int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group) | |
0f113f3e | 425 | { |
91e7bcc2 | 426 | if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0) |
3475bc96 | 427 | return 0; |
8fdc3734 | 428 | EC_GROUP_free(key->group); |
0f113f3e MC |
429 | key->group = EC_GROUP_dup(group); |
430 | return (key->group == NULL) ? 0 : 1; | |
431 | } | |
9dd84053 NL |
432 | |
433 | const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key) | |
0f113f3e MC |
434 | { |
435 | return key->priv_key; | |
436 | } | |
9dd84053 NL |
437 | |
438 | int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key) | |
0f113f3e | 439 | { |
6903e2e7 DSH |
440 | if (key->group == NULL || key->group->meth == NULL) |
441 | return 0; | |
acde647f KY |
442 | if (key->group->meth->set_private != NULL |
443 | && key->group->meth->set_private(key, priv_key) == 0) | |
6903e2e7 | 444 | return 0; |
91e7bcc2 DSH |
445 | if (key->meth->set_private != NULL |
446 | && key->meth->set_private(key, priv_key) == 0) | |
3475bc96 | 447 | return 0; |
23a1d5e9 | 448 | BN_clear_free(key->priv_key); |
0f113f3e MC |
449 | key->priv_key = BN_dup(priv_key); |
450 | return (key->priv_key == NULL) ? 0 : 1; | |
451 | } | |
9dd84053 NL |
452 | |
453 | const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key) | |
0f113f3e MC |
454 | { |
455 | return key->pub_key; | |
456 | } | |
9dd84053 NL |
457 | |
458 | int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key) | |
0f113f3e | 459 | { |
91e7bcc2 DSH |
460 | if (key->meth->set_public != NULL |
461 | && key->meth->set_public(key, pub_key) == 0) | |
3475bc96 | 462 | return 0; |
8fdc3734 | 463 | EC_POINT_free(key->pub_key); |
0f113f3e MC |
464 | key->pub_key = EC_POINT_dup(pub_key, key->group); |
465 | return (key->pub_key == NULL) ? 0 : 1; | |
466 | } | |
9dd84053 NL |
467 | |
468 | unsigned int EC_KEY_get_enc_flags(const EC_KEY *key) | |
0f113f3e MC |
469 | { |
470 | return key->enc_flag; | |
471 | } | |
9dd84053 NL |
472 | |
473 | void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags) | |
0f113f3e MC |
474 | { |
475 | key->enc_flag = flags; | |
476 | } | |
9dd84053 NL |
477 | |
478 | point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key) | |
0f113f3e MC |
479 | { |
480 | return key->conv_form; | |
481 | } | |
9dd84053 NL |
482 | |
483 | void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform) | |
0f113f3e MC |
484 | { |
485 | key->conv_form = cform; | |
486 | if (key->group != NULL) | |
487 | EC_GROUP_set_point_conversion_form(key->group, cform); | |
488 | } | |
9dd84053 | 489 | |
9dd84053 | 490 | void EC_KEY_set_asn1_flag(EC_KEY *key, int flag) |
0f113f3e MC |
491 | { |
492 | if (key->group != NULL) | |
493 | EC_GROUP_set_asn1_flag(key->group, flag); | |
494 | } | |
9dd84053 NL |
495 | |
496 | int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx) | |
0f113f3e MC |
497 | { |
498 | if (key->group == NULL) | |
499 | return 0; | |
500 | return EC_GROUP_precompute_mult(key->group, ctx); | |
501 | } | |
cac4fb58 DSH |
502 | |
503 | int EC_KEY_get_flags(const EC_KEY *key) | |
0f113f3e MC |
504 | { |
505 | return key->flags; | |
506 | } | |
cac4fb58 DSH |
507 | |
508 | void EC_KEY_set_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
509 | { |
510 | key->flags |= flags; | |
511 | } | |
cac4fb58 DSH |
512 | |
513 | void EC_KEY_clear_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
514 | { |
515 | key->flags &= ~flags; | |
516 | } | |
981bd8a2 DSH |
517 | |
518 | size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form, | |
519 | unsigned char **pbuf, BN_CTX *ctx) | |
520 | { | |
521 | if (key == NULL || key->pub_key == NULL || key->group == NULL) | |
522 | return 0; | |
523 | return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx); | |
524 | } | |
525 | ||
526 | int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len, | |
527 | BN_CTX *ctx) | |
528 | { | |
529 | if (key == NULL || key->group == NULL) | |
530 | return 0; | |
531 | if (key->pub_key == NULL) | |
532 | key->pub_key = EC_POINT_new(key->group); | |
533 | if (key->pub_key == NULL) | |
534 | return 0; | |
6ea04154 DSH |
535 | if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0) |
536 | return 0; | |
537 | /* | |
538 | * Save the point conversion form. | |
539 | * For non-custom curves the first octet of the buffer (excluding | |
540 | * the last significant bit) contains the point conversion form. | |
541 | * EC_POINT_oct2point() has already performed sanity checking of | |
542 | * the buffer so we know it is valid. | |
543 | */ | |
544 | if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) | |
545 | key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01); | |
546 | return 1; | |
981bd8a2 | 547 | } |
cf241395 DSH |
548 | |
549 | size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len) | |
550 | { | |
cf241395 DSH |
551 | if (eckey->group == NULL || eckey->group->meth == NULL) |
552 | return 0; | |
77470e98 DSH |
553 | if (eckey->group->meth->priv2oct == NULL) { |
554 | ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | return eckey->group->meth->priv2oct(eckey, buf, len); | |
559 | } | |
560 | ||
561 | size_t ec_key_simple_priv2oct(const EC_KEY *eckey, | |
562 | unsigned char *buf, size_t len) | |
563 | { | |
564 | size_t buf_len; | |
cf241395 | 565 | |
fe56d8e8 | 566 | buf_len = (EC_GROUP_order_bits(eckey->group) + 7) / 8; |
cf241395 DSH |
567 | if (eckey->priv_key == NULL) |
568 | return 0; | |
569 | if (buf == NULL) | |
570 | return buf_len; | |
571 | else if (len < buf_len) | |
572 | return 0; | |
573 | ||
cf241395 DSH |
574 | /* Octetstring may need leading zeros if BN is to short */ |
575 | ||
907e9500 | 576 | if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) { |
77470e98 | 577 | ECerr(EC_F_EC_KEY_SIMPLE_PRIV2OCT, EC_R_BUFFER_TOO_SMALL); |
cf241395 DSH |
578 | return 0; |
579 | } | |
580 | ||
cf241395 DSH |
581 | return buf_len; |
582 | } | |
583 | ||
584 | int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len) | |
585 | { | |
586 | if (eckey->group == NULL || eckey->group->meth == NULL) | |
587 | return 0; | |
77470e98 DSH |
588 | if (eckey->group->meth->oct2priv == NULL) { |
589 | ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
590 | return 0; | |
591 | } | |
592 | return eckey->group->meth->oct2priv(eckey, buf, len); | |
593 | } | |
cf241395 | 594 | |
77470e98 DSH |
595 | int ec_key_simple_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len) |
596 | { | |
cf241395 DSH |
597 | if (eckey->priv_key == NULL) |
598 | eckey->priv_key = BN_secure_new(); | |
599 | if (eckey->priv_key == NULL) { | |
77470e98 | 600 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_MALLOC_FAILURE); |
cf241395 DSH |
601 | return 0; |
602 | } | |
603 | eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key); | |
604 | if (eckey->priv_key == NULL) { | |
77470e98 | 605 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_BN_LIB); |
cf241395 DSH |
606 | return 0; |
607 | } | |
608 | return 1; | |
609 | } | |
7fc7d1a7 DSH |
610 | |
611 | size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf) | |
612 | { | |
613 | size_t len; | |
614 | unsigned char *buf; | |
615 | len = EC_KEY_priv2oct(eckey, NULL, 0); | |
afcee950 RS |
616 | if (len == 0) |
617 | return 0; | |
7fc7d1a7 DSH |
618 | buf = OPENSSL_malloc(len); |
619 | if (buf == NULL) | |
620 | return 0; | |
621 | len = EC_KEY_priv2oct(eckey, buf, len); | |
622 | if (len == 0) { | |
623 | OPENSSL_free(buf); | |
624 | return 0; | |
625 | } | |
626 | *pbuf = buf; | |
627 | return len; | |
628 | } | |
4b0555ec DSH |
629 | |
630 | int EC_KEY_can_sign(const EC_KEY *eckey) | |
631 | { | |
632 | if (eckey->group == NULL || eckey->group->meth == NULL | |
633 | || (eckey->group->meth->flags & EC_FLAGS_NO_SIGN)) | |
634 | return 0; | |
635 | return 1; | |
636 | } |