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Commit | Line | Data |
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14a7cfb3 BM |
1 | /* |
2 | * Written by Nils Larsch for the OpenSSL project. | |
3 | */ | |
4 | /* ==================================================================== | |
9dd84053 | 5 | * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. |
14a7cfb3 BM |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 12 | * notice, this list of conditions and the following disclaimer. |
14a7cfb3 BM |
13 | * |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * 3. All advertising materials mentioning features or use of this | |
20 | * software must display the following acknowledgment: | |
21 | * "This product includes software developed by the OpenSSL Project | |
22 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
23 | * | |
24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
25 | * endorse or promote products derived from this software without | |
26 | * prior written permission. For written permission, please contact | |
27 | * openssl-core@openssl.org. | |
28 | * | |
29 | * 5. Products derived from this software may not be called "OpenSSL" | |
30 | * nor may "OpenSSL" appear in their names without prior written | |
31 | * permission of the OpenSSL Project. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
37 | * | |
38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
49 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
50 | * ==================================================================== | |
51 | * | |
52 | * This product includes cryptographic software written by Eric Young | |
53 | * (eay@cryptsoft.com). This product includes software written by Tim | |
54 | * Hudson (tjh@cryptsoft.com). | |
55 | * | |
56 | */ | |
e172d60d BM |
57 | /* ==================================================================== |
58 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
0f113f3e | 59 | * Portions originally developed by SUN MICROSYSTEMS, INC., and |
e172d60d BM |
60 | * contributed to the OpenSSL project. |
61 | */ | |
14a7cfb3 | 62 | |
984d6c60 | 63 | #include <internal/cryptlib.h> |
5454829a | 64 | #include <string.h> |
14a7cfb3 BM |
65 | #include "ec_lcl.h" |
66 | #include <openssl/err.h> | |
3c27208f | 67 | #include <openssl/engine.h> |
14a7cfb3 BM |
68 | |
69 | EC_KEY *EC_KEY_new(void) | |
0f113f3e | 70 | { |
28572b57 | 71 | return EC_KEY_new_method(NULL); |
0f113f3e | 72 | } |
14a7cfb3 | 73 | |
9dd84053 | 74 | EC_KEY *EC_KEY_new_by_curve_name(int nid) |
0f113f3e MC |
75 | { |
76 | EC_KEY *ret = EC_KEY_new(); | |
77 | if (ret == NULL) | |
78 | return NULL; | |
79 | ret->group = EC_GROUP_new_by_curve_name(nid); | |
80 | if (ret->group == NULL) { | |
81 | EC_KEY_free(ret); | |
82 | return NULL; | |
83 | } | |
91e7bcc2 DSH |
84 | if (ret->meth->set_group != NULL |
85 | && ret->meth->set_group(ret, ret->group) == 0) { | |
3475bc96 DSH |
86 | EC_KEY_free(ret); |
87 | return NULL; | |
88 | } | |
0f113f3e MC |
89 | return ret; |
90 | } | |
14a7cfb3 BM |
91 | |
92 | void EC_KEY_free(EC_KEY *r) | |
0f113f3e MC |
93 | { |
94 | int i; | |
14a7cfb3 | 95 | |
0f113f3e MC |
96 | if (r == NULL) |
97 | return; | |
14a7cfb3 | 98 | |
9b398ef2 | 99 | CRYPTO_atomic_add(&r->references, -1, &i, r->lock); |
f3f1cf84 | 100 | REF_PRINT_COUNT("EC_KEY", r); |
0f113f3e MC |
101 | if (i > 0) |
102 | return; | |
f3f1cf84 | 103 | REF_ASSERT_ISNT(i < 0); |
14a7cfb3 | 104 | |
91e7bcc2 | 105 | if (r->meth->finish != NULL) |
0d6ff6d3 DSH |
106 | r->meth->finish(r); |
107 | ||
51966416 | 108 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 109 | ENGINE_finish(r->engine); |
51966416 DSH |
110 | #endif |
111 | ||
6903e2e7 DSH |
112 | if (r->group && r->group->meth->keyfinish) |
113 | r->group->meth->keyfinish(r); | |
114 | ||
3aef36ff | 115 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data); |
9b398ef2 | 116 | CRYPTO_THREAD_lock_free(r->lock); |
8fdc3734 RS |
117 | EC_GROUP_free(r->group); |
118 | EC_POINT_free(r->pub_key); | |
23a1d5e9 | 119 | BN_clear_free(r->priv_key); |
14a7cfb3 | 120 | |
4b45c6e5 | 121 | OPENSSL_clear_free((void *)r, sizeof(EC_KEY)); |
0f113f3e | 122 | } |
14a7cfb3 | 123 | |
3aef36ff | 124 | EC_KEY *EC_KEY_copy(EC_KEY *dest, EC_KEY *src) |
0f113f3e | 125 | { |
0f113f3e MC |
126 | if (dest == NULL || src == NULL) { |
127 | ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER); | |
128 | return NULL; | |
129 | } | |
ea0392b9 | 130 | if (src->meth != dest->meth) { |
91e7bcc2 | 131 | if (dest->meth->finish != NULL) |
ea0392b9 | 132 | dest->meth->finish(dest); |
6903e2e7 DSH |
133 | if (dest->group && dest->group->meth->keyfinish) |
134 | dest->group->meth->keyfinish(dest); | |
ea0392b9 | 135 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 136 | if (ENGINE_finish(dest->engine) == 0) |
ea0392b9 DSH |
137 | return 0; |
138 | dest->engine = NULL; | |
139 | #endif | |
140 | } | |
0f113f3e | 141 | /* copy the parameters */ |
91e7bcc2 | 142 | if (src->group != NULL) { |
0f113f3e MC |
143 | const EC_METHOD *meth = EC_GROUP_method_of(src->group); |
144 | /* clear the old group */ | |
8fdc3734 | 145 | EC_GROUP_free(dest->group); |
0f113f3e MC |
146 | dest->group = EC_GROUP_new(meth); |
147 | if (dest->group == NULL) | |
148 | return NULL; | |
149 | if (!EC_GROUP_copy(dest->group, src->group)) | |
150 | return NULL; | |
40a8643a MC |
151 | |
152 | /* copy the public key */ | |
153 | if (src->pub_key != NULL) { | |
154 | EC_POINT_free(dest->pub_key); | |
155 | dest->pub_key = EC_POINT_new(src->group); | |
156 | if (dest->pub_key == NULL) | |
157 | return NULL; | |
158 | if (!EC_POINT_copy(dest->pub_key, src->pub_key)) | |
159 | return NULL; | |
160 | } | |
161 | /* copy the private key */ | |
162 | if (src->priv_key != NULL) { | |
163 | if (dest->priv_key == NULL) { | |
164 | dest->priv_key = BN_new(); | |
165 | if (dest->priv_key == NULL) | |
166 | return NULL; | |
167 | } | |
168 | if (!BN_copy(dest->priv_key, src->priv_key)) | |
169 | return NULL; | |
170 | if (src->group->meth->keycopy | |
171 | && src->group->meth->keycopy(dest, src) == 0) | |
0f113f3e MC |
172 | return NULL; |
173 | } | |
0f113f3e | 174 | } |
0f113f3e | 175 | |
6903e2e7 | 176 | |
0f113f3e MC |
177 | /* copy the rest */ |
178 | dest->enc_flag = src->enc_flag; | |
179 | dest->conv_form = src->conv_form; | |
180 | dest->version = src->version; | |
181 | dest->flags = src->flags; | |
3aef36ff RS |
182 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY, |
183 | &dest->ex_data, &src->ex_data)) | |
184 | return NULL; | |
0f113f3e | 185 | |
ea0392b9 DSH |
186 | if (src->meth != dest->meth) { |
187 | #ifndef OPENSSL_NO_ENGINE | |
91e7bcc2 DSH |
188 | if (src->engine != NULL && ENGINE_init(src->engine) == 0) |
189 | return NULL; | |
ea0392b9 DSH |
190 | dest->engine = src->engine; |
191 | #endif | |
192 | dest->meth = src->meth; | |
193 | } | |
194 | ||
91e7bcc2 DSH |
195 | if (src->meth->copy != NULL && src->meth->copy(dest, src) == 0) |
196 | return NULL; | |
ea0392b9 | 197 | |
0f113f3e MC |
198 | return dest; |
199 | } | |
14a7cfb3 | 200 | |
3aef36ff | 201 | EC_KEY *EC_KEY_dup(EC_KEY *ec_key) |
0f113f3e | 202 | { |
ea0392b9 | 203 | EC_KEY *ret = EC_KEY_new_method(ec_key->engine); |
3aef36ff | 204 | |
0f113f3e MC |
205 | if (ret == NULL) |
206 | return NULL; | |
9b398ef2 | 207 | |
0f113f3e MC |
208 | if (EC_KEY_copy(ret, ec_key) == NULL) { |
209 | EC_KEY_free(ret); | |
210 | return NULL; | |
211 | } | |
212 | return ret; | |
213 | } | |
14a7cfb3 | 214 | |
e172d60d | 215 | int EC_KEY_up_ref(EC_KEY *r) |
0f113f3e | 216 | { |
9b398ef2 AG |
217 | int i; |
218 | ||
219 | if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0) | |
220 | return 0; | |
f3f1cf84 RS |
221 | |
222 | REF_PRINT_COUNT("EC_KEY", r); | |
223 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
224 | return ((i > 1) ? 1 : 0); |
225 | } | |
e172d60d | 226 | |
14a7cfb3 | 227 | int EC_KEY_generate_key(EC_KEY *eckey) |
0f113f3e | 228 | { |
91e7bcc2 | 229 | if (eckey == NULL || eckey->group == NULL) { |
0f113f3e MC |
230 | ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER); |
231 | return 0; | |
232 | } | |
91e7bcc2 | 233 | if (eckey->meth->keygen != NULL) |
5a6a1029 DSH |
234 | return eckey->meth->keygen(eckey); |
235 | ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | int ossl_ec_key_gen(EC_KEY *eckey) | |
77470e98 | 240 | { |
9ff9bccc | 241 | OPENSSL_assert(eckey->group->meth->keygen != NULL); |
77470e98 DSH |
242 | return eckey->group->meth->keygen(eckey); |
243 | } | |
244 | ||
245 | int ec_key_simple_generate_key(EC_KEY *eckey) | |
5a6a1029 DSH |
246 | { |
247 | int ok = 0; | |
248 | BN_CTX *ctx = NULL; | |
be2e334f DSH |
249 | BIGNUM *priv_key = NULL; |
250 | const BIGNUM *order = NULL; | |
5a6a1029 | 251 | EC_POINT *pub_key = NULL; |
0f113f3e | 252 | |
0f113f3e MC |
253 | if ((ctx = BN_CTX_new()) == NULL) |
254 | goto err; | |
255 | ||
256 | if (eckey->priv_key == NULL) { | |
257 | priv_key = BN_new(); | |
258 | if (priv_key == NULL) | |
259 | goto err; | |
260 | } else | |
261 | priv_key = eckey->priv_key; | |
262 | ||
be2e334f DSH |
263 | order = EC_GROUP_get0_order(eckey->group); |
264 | if (order == NULL) | |
0f113f3e MC |
265 | goto err; |
266 | ||
267 | do | |
268 | if (!BN_rand_range(priv_key, order)) | |
269 | goto err; | |
270 | while (BN_is_zero(priv_key)) ; | |
271 | ||
272 | if (eckey->pub_key == NULL) { | |
273 | pub_key = EC_POINT_new(eckey->group); | |
274 | if (pub_key == NULL) | |
275 | goto err; | |
276 | } else | |
277 | pub_key = eckey->pub_key; | |
278 | ||
279 | if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx)) | |
280 | goto err; | |
281 | ||
282 | eckey->priv_key = priv_key; | |
283 | eckey->pub_key = pub_key; | |
284 | ||
285 | ok = 1; | |
286 | ||
287 | err: | |
8fdc3734 | 288 | if (eckey->pub_key == NULL) |
0f113f3e | 289 | EC_POINT_free(pub_key); |
23a1d5e9 | 290 | if (eckey->priv_key != priv_key) |
0f113f3e | 291 | BN_free(priv_key); |
23a1d5e9 | 292 | BN_CTX_free(ctx); |
77470e98 DSH |
293 | return ok; |
294 | } | |
295 | ||
296 | int ec_key_simple_generate_public_key(EC_KEY *eckey) | |
297 | { | |
298 | return EC_POINT_mul(eckey->group, eckey->pub_key, eckey->priv_key, NULL, | |
299 | NULL, NULL); | |
0f113f3e | 300 | } |
14a7cfb3 BM |
301 | |
302 | int EC_KEY_check_key(const EC_KEY *eckey) | |
77470e98 DSH |
303 | { |
304 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) { | |
305 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | if (eckey->group->meth->keycheck == NULL) { | |
310 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | return eckey->group->meth->keycheck(eckey); | |
315 | } | |
316 | ||
317 | int ec_key_simple_check_key(const EC_KEY *eckey) | |
0f113f3e MC |
318 | { |
319 | int ok = 0; | |
320 | BN_CTX *ctx = NULL; | |
321 | const BIGNUM *order = NULL; | |
322 | EC_POINT *point = NULL; | |
323 | ||
91e7bcc2 | 324 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) { |
77470e98 | 325 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
326 | return 0; |
327 | } | |
328 | ||
329 | if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) { | |
77470e98 | 330 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_AT_INFINITY); |
0f113f3e MC |
331 | goto err; |
332 | } | |
333 | ||
334 | if ((ctx = BN_CTX_new()) == NULL) | |
335 | goto err; | |
336 | if ((point = EC_POINT_new(eckey->group)) == NULL) | |
337 | goto err; | |
338 | ||
339 | /* testing whether the pub_key is on the elliptic curve */ | |
68886be7 | 340 | if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) { |
77470e98 | 341 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE); |
0f113f3e MC |
342 | goto err; |
343 | } | |
344 | /* testing whether pub_key * order is the point at infinity */ | |
345 | order = eckey->group->order; | |
346 | if (BN_is_zero(order)) { | |
77470e98 | 347 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
348 | goto err; |
349 | } | |
350 | if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) { | |
77470e98 | 351 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB); |
0f113f3e MC |
352 | goto err; |
353 | } | |
354 | if (!EC_POINT_is_at_infinity(eckey->group, point)) { | |
77470e98 | 355 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER); |
0f113f3e MC |
356 | goto err; |
357 | } | |
358 | /* | |
359 | * in case the priv_key is present : check if generator * priv_key == | |
360 | * pub_key | |
361 | */ | |
91e7bcc2 | 362 | if (eckey->priv_key != NULL) { |
0f113f3e | 363 | if (BN_cmp(eckey->priv_key, order) >= 0) { |
77470e98 | 364 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER); |
0f113f3e MC |
365 | goto err; |
366 | } | |
367 | if (!EC_POINT_mul(eckey->group, point, eckey->priv_key, | |
368 | NULL, NULL, ctx)) { | |
77470e98 | 369 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB); |
0f113f3e MC |
370 | goto err; |
371 | } | |
372 | if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) { | |
77470e98 | 373 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY); |
0f113f3e MC |
374 | goto err; |
375 | } | |
376 | } | |
377 | ok = 1; | |
378 | err: | |
23a1d5e9 | 379 | BN_CTX_free(ctx); |
8fdc3734 | 380 | EC_POINT_free(point); |
77470e98 | 381 | return ok; |
0f113f3e MC |
382 | } |
383 | ||
384 | int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, | |
385 | BIGNUM *y) | |
386 | { | |
387 | BN_CTX *ctx = NULL; | |
388 | BIGNUM *tx, *ty; | |
389 | EC_POINT *point = NULL; | |
8d11b7c7 MC |
390 | int ok = 0; |
391 | #ifndef OPENSSL_NO_EC2M | |
392 | int tmp_nid, is_char_two = 0; | |
393 | #endif | |
0f113f3e | 394 | |
91e7bcc2 | 395 | if (key == NULL || key->group == NULL || x == NULL || y == NULL) { |
0f113f3e MC |
396 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, |
397 | ERR_R_PASSED_NULL_PARAMETER); | |
398 | return 0; | |
399 | } | |
400 | ctx = BN_CTX_new(); | |
90945fa3 | 401 | if (ctx == NULL) |
2ab851b7 | 402 | return 0; |
0f113f3e | 403 | |
2ab851b7 | 404 | BN_CTX_start(ctx); |
0f113f3e MC |
405 | point = EC_POINT_new(key->group); |
406 | ||
90945fa3 | 407 | if (point == NULL) |
0f113f3e MC |
408 | goto err; |
409 | ||
8d11b7c7 MC |
410 | tx = BN_CTX_get(ctx); |
411 | ty = BN_CTX_get(ctx); | |
dd67493c BB |
412 | if (ty == NULL) |
413 | goto err; | |
8d11b7c7 MC |
414 | |
415 | #ifndef OPENSSL_NO_EC2M | |
0f113f3e MC |
416 | tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group)); |
417 | ||
418 | if (tmp_nid == NID_X9_62_characteristic_two_field) | |
419 | is_char_two = 1; | |
420 | ||
0f113f3e MC |
421 | if (is_char_two) { |
422 | if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point, | |
423 | x, y, ctx)) | |
424 | goto err; | |
425 | if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point, | |
426 | tx, ty, ctx)) | |
427 | goto err; | |
428 | } else | |
b3310161 | 429 | #endif |
0f113f3e MC |
430 | { |
431 | if (!EC_POINT_set_affine_coordinates_GFp(key->group, point, | |
432 | x, y, ctx)) | |
433 | goto err; | |
434 | if (!EC_POINT_get_affine_coordinates_GFp(key->group, point, | |
435 | tx, ty, ctx)) | |
436 | goto err; | |
437 | } | |
438 | /* | |
439 | * Check if retrieved coordinates match originals and are less than field | |
440 | * order: if not values are out of range. | |
441 | */ | |
442 | if (BN_cmp(x, tx) || BN_cmp(y, ty) | |
443 | || (BN_cmp(x, key->group->field) >= 0) | |
444 | || (BN_cmp(y, key->group->field) >= 0)) { | |
445 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, | |
446 | EC_R_COORDINATES_OUT_OF_RANGE); | |
447 | goto err; | |
448 | } | |
449 | ||
450 | if (!EC_KEY_set_public_key(key, point)) | |
451 | goto err; | |
452 | ||
453 | if (EC_KEY_check_key(key) == 0) | |
454 | goto err; | |
455 | ||
456 | ok = 1; | |
457 | ||
458 | err: | |
2ab851b7 | 459 | BN_CTX_end(ctx); |
23a1d5e9 | 460 | BN_CTX_free(ctx); |
8fdc3734 | 461 | EC_POINT_free(point); |
0f113f3e MC |
462 | return ok; |
463 | ||
464 | } | |
fef1c40b | 465 | |
9dd84053 | 466 | const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key) |
0f113f3e MC |
467 | { |
468 | return key->group; | |
469 | } | |
9dd84053 NL |
470 | |
471 | int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group) | |
0f113f3e | 472 | { |
91e7bcc2 | 473 | if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0) |
3475bc96 | 474 | return 0; |
8fdc3734 | 475 | EC_GROUP_free(key->group); |
0f113f3e MC |
476 | key->group = EC_GROUP_dup(group); |
477 | return (key->group == NULL) ? 0 : 1; | |
478 | } | |
9dd84053 NL |
479 | |
480 | const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key) | |
0f113f3e MC |
481 | { |
482 | return key->priv_key; | |
483 | } | |
9dd84053 NL |
484 | |
485 | int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key) | |
0f113f3e | 486 | { |
6903e2e7 DSH |
487 | if (key->group == NULL || key->group->meth == NULL) |
488 | return 0; | |
acde647f KY |
489 | if (key->group->meth->set_private != NULL |
490 | && key->group->meth->set_private(key, priv_key) == 0) | |
6903e2e7 | 491 | return 0; |
91e7bcc2 DSH |
492 | if (key->meth->set_private != NULL |
493 | && key->meth->set_private(key, priv_key) == 0) | |
3475bc96 | 494 | return 0; |
23a1d5e9 | 495 | BN_clear_free(key->priv_key); |
0f113f3e MC |
496 | key->priv_key = BN_dup(priv_key); |
497 | return (key->priv_key == NULL) ? 0 : 1; | |
498 | } | |
9dd84053 NL |
499 | |
500 | const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key) | |
0f113f3e MC |
501 | { |
502 | return key->pub_key; | |
503 | } | |
9dd84053 NL |
504 | |
505 | int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key) | |
0f113f3e | 506 | { |
91e7bcc2 DSH |
507 | if (key->meth->set_public != NULL |
508 | && key->meth->set_public(key, pub_key) == 0) | |
3475bc96 | 509 | return 0; |
8fdc3734 | 510 | EC_POINT_free(key->pub_key); |
0f113f3e MC |
511 | key->pub_key = EC_POINT_dup(pub_key, key->group); |
512 | return (key->pub_key == NULL) ? 0 : 1; | |
513 | } | |
9dd84053 NL |
514 | |
515 | unsigned int EC_KEY_get_enc_flags(const EC_KEY *key) | |
0f113f3e MC |
516 | { |
517 | return key->enc_flag; | |
518 | } | |
9dd84053 NL |
519 | |
520 | void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags) | |
0f113f3e MC |
521 | { |
522 | key->enc_flag = flags; | |
523 | } | |
9dd84053 NL |
524 | |
525 | point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key) | |
0f113f3e MC |
526 | { |
527 | return key->conv_form; | |
528 | } | |
9dd84053 NL |
529 | |
530 | void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform) | |
0f113f3e MC |
531 | { |
532 | key->conv_form = cform; | |
533 | if (key->group != NULL) | |
534 | EC_GROUP_set_point_conversion_form(key->group, cform); | |
535 | } | |
9dd84053 | 536 | |
9dd84053 | 537 | void EC_KEY_set_asn1_flag(EC_KEY *key, int flag) |
0f113f3e MC |
538 | { |
539 | if (key->group != NULL) | |
540 | EC_GROUP_set_asn1_flag(key->group, flag); | |
541 | } | |
9dd84053 NL |
542 | |
543 | int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx) | |
0f113f3e MC |
544 | { |
545 | if (key->group == NULL) | |
546 | return 0; | |
547 | return EC_GROUP_precompute_mult(key->group, ctx); | |
548 | } | |
cac4fb58 DSH |
549 | |
550 | int EC_KEY_get_flags(const EC_KEY *key) | |
0f113f3e MC |
551 | { |
552 | return key->flags; | |
553 | } | |
cac4fb58 DSH |
554 | |
555 | void EC_KEY_set_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
556 | { |
557 | key->flags |= flags; | |
558 | } | |
cac4fb58 DSH |
559 | |
560 | void EC_KEY_clear_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
561 | { |
562 | key->flags &= ~flags; | |
563 | } | |
981bd8a2 DSH |
564 | |
565 | size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form, | |
566 | unsigned char **pbuf, BN_CTX *ctx) | |
567 | { | |
568 | if (key == NULL || key->pub_key == NULL || key->group == NULL) | |
569 | return 0; | |
570 | return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx); | |
571 | } | |
572 | ||
573 | int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len, | |
574 | BN_CTX *ctx) | |
575 | { | |
576 | if (key == NULL || key->group == NULL) | |
577 | return 0; | |
578 | if (key->pub_key == NULL) | |
579 | key->pub_key = EC_POINT_new(key->group); | |
580 | if (key->pub_key == NULL) | |
581 | return 0; | |
6ea04154 DSH |
582 | if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0) |
583 | return 0; | |
584 | /* | |
585 | * Save the point conversion form. | |
586 | * For non-custom curves the first octet of the buffer (excluding | |
587 | * the last significant bit) contains the point conversion form. | |
588 | * EC_POINT_oct2point() has already performed sanity checking of | |
589 | * the buffer so we know it is valid. | |
590 | */ | |
591 | if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) | |
592 | key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01); | |
593 | return 1; | |
981bd8a2 | 594 | } |
cf241395 DSH |
595 | |
596 | size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len) | |
597 | { | |
cf241395 DSH |
598 | if (eckey->group == NULL || eckey->group->meth == NULL) |
599 | return 0; | |
77470e98 DSH |
600 | if (eckey->group->meth->priv2oct == NULL) { |
601 | ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | return eckey->group->meth->priv2oct(eckey, buf, len); | |
606 | } | |
607 | ||
608 | size_t ec_key_simple_priv2oct(const EC_KEY *eckey, | |
609 | unsigned char *buf, size_t len) | |
610 | { | |
611 | size_t buf_len; | |
cf241395 | 612 | |
fe56d8e8 | 613 | buf_len = (EC_GROUP_order_bits(eckey->group) + 7) / 8; |
cf241395 DSH |
614 | if (eckey->priv_key == NULL) |
615 | return 0; | |
616 | if (buf == NULL) | |
617 | return buf_len; | |
618 | else if (len < buf_len) | |
619 | return 0; | |
620 | ||
cf241395 DSH |
621 | /* Octetstring may need leading zeros if BN is to short */ |
622 | ||
907e9500 | 623 | if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) { |
77470e98 | 624 | ECerr(EC_F_EC_KEY_SIMPLE_PRIV2OCT, EC_R_BUFFER_TOO_SMALL); |
cf241395 DSH |
625 | return 0; |
626 | } | |
627 | ||
cf241395 DSH |
628 | return buf_len; |
629 | } | |
630 | ||
631 | int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len) | |
632 | { | |
633 | if (eckey->group == NULL || eckey->group->meth == NULL) | |
634 | return 0; | |
77470e98 DSH |
635 | if (eckey->group->meth->oct2priv == NULL) { |
636 | ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
637 | return 0; | |
638 | } | |
639 | return eckey->group->meth->oct2priv(eckey, buf, len); | |
640 | } | |
cf241395 | 641 | |
77470e98 DSH |
642 | int ec_key_simple_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len) |
643 | { | |
cf241395 DSH |
644 | if (eckey->priv_key == NULL) |
645 | eckey->priv_key = BN_secure_new(); | |
646 | if (eckey->priv_key == NULL) { | |
77470e98 | 647 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_MALLOC_FAILURE); |
cf241395 DSH |
648 | return 0; |
649 | } | |
650 | eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key); | |
651 | if (eckey->priv_key == NULL) { | |
77470e98 | 652 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_BN_LIB); |
cf241395 DSH |
653 | return 0; |
654 | } | |
655 | return 1; | |
656 | } | |
7fc7d1a7 DSH |
657 | |
658 | size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf) | |
659 | { | |
660 | size_t len; | |
661 | unsigned char *buf; | |
662 | len = EC_KEY_priv2oct(eckey, NULL, 0); | |
afcee950 RS |
663 | if (len == 0) |
664 | return 0; | |
7fc7d1a7 DSH |
665 | buf = OPENSSL_malloc(len); |
666 | if (buf == NULL) | |
667 | return 0; | |
668 | len = EC_KEY_priv2oct(eckey, buf, len); | |
669 | if (len == 0) { | |
670 | OPENSSL_free(buf); | |
671 | return 0; | |
672 | } | |
673 | *pbuf = buf; | |
674 | return len; | |
675 | } | |
4b0555ec DSH |
676 | |
677 | int EC_KEY_can_sign(const EC_KEY *eckey) | |
678 | { | |
679 | if (eckey->group == NULL || eckey->group->meth == NULL | |
680 | || (eckey->group->meth->flags & EC_FLAGS_NO_SIGN)) | |
681 | return 0; | |
682 | return 1; | |
683 | } |