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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> | |
33bed28b | 67 | #ifndef OPENSSL_NO_ENGINE |
51966416 DSH |
68 | # include <openssl/engine.h> |
69 | #endif | |
14a7cfb3 BM |
70 | |
71 | EC_KEY *EC_KEY_new(void) | |
0f113f3e | 72 | { |
28572b57 | 73 | return EC_KEY_new_method(NULL); |
0f113f3e | 74 | } |
14a7cfb3 | 75 | |
9dd84053 | 76 | EC_KEY *EC_KEY_new_by_curve_name(int nid) |
0f113f3e MC |
77 | { |
78 | EC_KEY *ret = EC_KEY_new(); | |
79 | if (ret == NULL) | |
80 | return NULL; | |
81 | ret->group = EC_GROUP_new_by_curve_name(nid); | |
82 | if (ret->group == NULL) { | |
83 | EC_KEY_free(ret); | |
84 | return NULL; | |
85 | } | |
91e7bcc2 DSH |
86 | if (ret->meth->set_group != NULL |
87 | && ret->meth->set_group(ret, ret->group) == 0) { | |
3475bc96 DSH |
88 | EC_KEY_free(ret); |
89 | return NULL; | |
90 | } | |
0f113f3e MC |
91 | return ret; |
92 | } | |
14a7cfb3 BM |
93 | |
94 | void EC_KEY_free(EC_KEY *r) | |
0f113f3e MC |
95 | { |
96 | int i; | |
14a7cfb3 | 97 | |
0f113f3e MC |
98 | if (r == NULL) |
99 | return; | |
14a7cfb3 | 100 | |
0f113f3e | 101 | i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC); |
f3f1cf84 | 102 | REF_PRINT_COUNT("EC_KEY", r); |
0f113f3e MC |
103 | if (i > 0) |
104 | return; | |
f3f1cf84 | 105 | REF_ASSERT_ISNT(i < 0); |
14a7cfb3 | 106 | |
91e7bcc2 | 107 | if (r->meth->finish != NULL) |
0d6ff6d3 DSH |
108 | r->meth->finish(r); |
109 | ||
51966416 | 110 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 111 | ENGINE_finish(r->engine); |
51966416 DSH |
112 | #endif |
113 | ||
6903e2e7 DSH |
114 | if (r->group && r->group->meth->keyfinish) |
115 | r->group->meth->keyfinish(r); | |
116 | ||
3aef36ff | 117 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data); |
8fdc3734 RS |
118 | EC_GROUP_free(r->group); |
119 | EC_POINT_free(r->pub_key); | |
23a1d5e9 | 120 | BN_clear_free(r->priv_key); |
14a7cfb3 | 121 | |
4b45c6e5 | 122 | OPENSSL_clear_free((void *)r, sizeof(EC_KEY)); |
0f113f3e | 123 | } |
14a7cfb3 | 124 | |
3aef36ff | 125 | EC_KEY *EC_KEY_copy(EC_KEY *dest, EC_KEY *src) |
0f113f3e | 126 | { |
0f113f3e MC |
127 | if (dest == NULL || src == NULL) { |
128 | ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER); | |
129 | return NULL; | |
130 | } | |
ea0392b9 | 131 | if (src->meth != dest->meth) { |
91e7bcc2 | 132 | if (dest->meth->finish != NULL) |
ea0392b9 | 133 | dest->meth->finish(dest); |
6903e2e7 DSH |
134 | if (dest->group && dest->group->meth->keyfinish) |
135 | dest->group->meth->keyfinish(dest); | |
ea0392b9 | 136 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 137 | if (ENGINE_finish(dest->engine) == 0) |
ea0392b9 DSH |
138 | return 0; |
139 | dest->engine = NULL; | |
140 | #endif | |
141 | } | |
0f113f3e | 142 | /* copy the parameters */ |
91e7bcc2 | 143 | if (src->group != NULL) { |
0f113f3e MC |
144 | const EC_METHOD *meth = EC_GROUP_method_of(src->group); |
145 | /* clear the old group */ | |
8fdc3734 | 146 | EC_GROUP_free(dest->group); |
0f113f3e MC |
147 | dest->group = EC_GROUP_new(meth); |
148 | if (dest->group == NULL) | |
149 | return NULL; | |
150 | if (!EC_GROUP_copy(dest->group, src->group)) | |
151 | return NULL; | |
152 | } | |
153 | /* copy the public key */ | |
91e7bcc2 | 154 | if (src->pub_key != NULL && src->group != NULL) { |
8fdc3734 | 155 | EC_POINT_free(dest->pub_key); |
0f113f3e MC |
156 | dest->pub_key = EC_POINT_new(src->group); |
157 | if (dest->pub_key == NULL) | |
158 | return NULL; | |
159 | if (!EC_POINT_copy(dest->pub_key, src->pub_key)) | |
160 | return NULL; | |
161 | } | |
162 | /* copy the private key */ | |
91e7bcc2 | 163 | if (src->priv_key != NULL) { |
0f113f3e MC |
164 | if (dest->priv_key == NULL) { |
165 | dest->priv_key = BN_new(); | |
166 | if (dest->priv_key == NULL) | |
167 | return NULL; | |
168 | } | |
169 | if (!BN_copy(dest->priv_key, src->priv_key)) | |
170 | return NULL; | |
6903e2e7 DSH |
171 | if (src->group->meth->keycopy |
172 | && src->group->meth->keycopy(dest, src) == 0) | |
173 | return NULL; | |
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; | |
207 | if (EC_KEY_copy(ret, ec_key) == NULL) { | |
208 | EC_KEY_free(ret); | |
209 | return NULL; | |
210 | } | |
211 | return ret; | |
212 | } | |
14a7cfb3 | 213 | |
e172d60d | 214 | int EC_KEY_up_ref(EC_KEY *r) |
0f113f3e MC |
215 | { |
216 | int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC); | |
f3f1cf84 RS |
217 | |
218 | REF_PRINT_COUNT("EC_KEY", r); | |
219 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
220 | return ((i > 1) ? 1 : 0); |
221 | } | |
e172d60d | 222 | |
14a7cfb3 | 223 | int EC_KEY_generate_key(EC_KEY *eckey) |
0f113f3e | 224 | { |
91e7bcc2 | 225 | if (eckey == NULL || eckey->group == NULL) { |
0f113f3e MC |
226 | ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER); |
227 | return 0; | |
228 | } | |
91e7bcc2 | 229 | if (eckey->meth->keygen != NULL) |
5a6a1029 DSH |
230 | return eckey->meth->keygen(eckey); |
231 | ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED); | |
232 | return 0; | |
233 | } | |
234 | ||
235 | int ossl_ec_key_gen(EC_KEY *eckey) | |
236 | { | |
237 | int ok = 0; | |
238 | BN_CTX *ctx = NULL; | |
be2e334f DSH |
239 | BIGNUM *priv_key = NULL; |
240 | const BIGNUM *order = NULL; | |
5a6a1029 | 241 | EC_POINT *pub_key = NULL; |
0f113f3e | 242 | |
6903e2e7 DSH |
243 | if (eckey->group->meth->keygen != NULL) |
244 | return eckey->group->meth->keygen(eckey); | |
245 | ||
0f113f3e MC |
246 | if ((ctx = BN_CTX_new()) == NULL) |
247 | goto err; | |
248 | ||
249 | if (eckey->priv_key == NULL) { | |
250 | priv_key = BN_new(); | |
251 | if (priv_key == NULL) | |
252 | goto err; | |
253 | } else | |
254 | priv_key = eckey->priv_key; | |
255 | ||
be2e334f DSH |
256 | order = EC_GROUP_get0_order(eckey->group); |
257 | if (order == NULL) | |
0f113f3e MC |
258 | goto err; |
259 | ||
260 | do | |
261 | if (!BN_rand_range(priv_key, order)) | |
262 | goto err; | |
263 | while (BN_is_zero(priv_key)) ; | |
264 | ||
265 | if (eckey->pub_key == NULL) { | |
266 | pub_key = EC_POINT_new(eckey->group); | |
267 | if (pub_key == NULL) | |
268 | goto err; | |
269 | } else | |
270 | pub_key = eckey->pub_key; | |
271 | ||
272 | if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx)) | |
273 | goto err; | |
274 | ||
275 | eckey->priv_key = priv_key; | |
276 | eckey->pub_key = pub_key; | |
277 | ||
278 | ok = 1; | |
279 | ||
280 | err: | |
8fdc3734 | 281 | if (eckey->pub_key == NULL) |
0f113f3e | 282 | EC_POINT_free(pub_key); |
23a1d5e9 | 283 | if (eckey->priv_key != priv_key) |
0f113f3e | 284 | BN_free(priv_key); |
23a1d5e9 | 285 | BN_CTX_free(ctx); |
0f113f3e MC |
286 | return (ok); |
287 | } | |
14a7cfb3 BM |
288 | |
289 | int EC_KEY_check_key(const EC_KEY *eckey) | |
0f113f3e MC |
290 | { |
291 | int ok = 0; | |
292 | BN_CTX *ctx = NULL; | |
293 | const BIGNUM *order = NULL; | |
294 | EC_POINT *point = NULL; | |
295 | ||
91e7bcc2 | 296 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) { |
0f113f3e MC |
297 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER); |
298 | return 0; | |
299 | } | |
300 | ||
6903e2e7 DSH |
301 | if (eckey->group->meth->keycheck) |
302 | return eckey->group->meth->keycheck(eckey); | |
303 | ||
0f113f3e MC |
304 | if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) { |
305 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_AT_INFINITY); | |
306 | goto err; | |
307 | } | |
308 | ||
309 | if ((ctx = BN_CTX_new()) == NULL) | |
310 | goto err; | |
311 | if ((point = EC_POINT_new(eckey->group)) == NULL) | |
312 | goto err; | |
313 | ||
314 | /* testing whether the pub_key is on the elliptic curve */ | |
68886be7 | 315 | if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) { |
0f113f3e MC |
316 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE); |
317 | goto err; | |
318 | } | |
319 | /* testing whether pub_key * order is the point at infinity */ | |
320 | order = eckey->group->order; | |
321 | if (BN_is_zero(order)) { | |
322 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_GROUP_ORDER); | |
323 | goto err; | |
324 | } | |
325 | if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) { | |
326 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB); | |
327 | goto err; | |
328 | } | |
329 | if (!EC_POINT_is_at_infinity(eckey->group, point)) { | |
330 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER); | |
331 | goto err; | |
332 | } | |
333 | /* | |
334 | * in case the priv_key is present : check if generator * priv_key == | |
335 | * pub_key | |
336 | */ | |
91e7bcc2 | 337 | if (eckey->priv_key != NULL) { |
0f113f3e MC |
338 | if (BN_cmp(eckey->priv_key, order) >= 0) { |
339 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER); | |
340 | goto err; | |
341 | } | |
342 | if (!EC_POINT_mul(eckey->group, point, eckey->priv_key, | |
343 | NULL, NULL, ctx)) { | |
344 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB); | |
345 | goto err; | |
346 | } | |
347 | if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) { | |
348 | ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY); | |
349 | goto err; | |
350 | } | |
351 | } | |
352 | ok = 1; | |
353 | err: | |
23a1d5e9 | 354 | BN_CTX_free(ctx); |
8fdc3734 | 355 | EC_POINT_free(point); |
0f113f3e MC |
356 | return (ok); |
357 | } | |
358 | ||
359 | int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, | |
360 | BIGNUM *y) | |
361 | { | |
362 | BN_CTX *ctx = NULL; | |
363 | BIGNUM *tx, *ty; | |
364 | EC_POINT *point = NULL; | |
8d11b7c7 MC |
365 | int ok = 0; |
366 | #ifndef OPENSSL_NO_EC2M | |
367 | int tmp_nid, is_char_two = 0; | |
368 | #endif | |
0f113f3e | 369 | |
91e7bcc2 | 370 | if (key == NULL || key->group == NULL || x == NULL || y == NULL) { |
0f113f3e MC |
371 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, |
372 | ERR_R_PASSED_NULL_PARAMETER); | |
373 | return 0; | |
374 | } | |
375 | ctx = BN_CTX_new(); | |
90945fa3 | 376 | if (ctx == NULL) |
0f113f3e MC |
377 | goto err; |
378 | ||
379 | point = EC_POINT_new(key->group); | |
380 | ||
90945fa3 | 381 | if (point == NULL) |
0f113f3e MC |
382 | goto err; |
383 | ||
8d11b7c7 MC |
384 | tx = BN_CTX_get(ctx); |
385 | ty = BN_CTX_get(ctx); | |
dd67493c BB |
386 | if (ty == NULL) |
387 | goto err; | |
8d11b7c7 MC |
388 | |
389 | #ifndef OPENSSL_NO_EC2M | |
0f113f3e MC |
390 | tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group)); |
391 | ||
392 | if (tmp_nid == NID_X9_62_characteristic_two_field) | |
393 | is_char_two = 1; | |
394 | ||
0f113f3e MC |
395 | if (is_char_two) { |
396 | if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point, | |
397 | x, y, ctx)) | |
398 | goto err; | |
399 | if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point, | |
400 | tx, ty, ctx)) | |
401 | goto err; | |
402 | } else | |
b3310161 | 403 | #endif |
0f113f3e MC |
404 | { |
405 | if (!EC_POINT_set_affine_coordinates_GFp(key->group, point, | |
406 | x, y, ctx)) | |
407 | goto err; | |
408 | if (!EC_POINT_get_affine_coordinates_GFp(key->group, point, | |
409 | tx, ty, ctx)) | |
410 | goto err; | |
411 | } | |
412 | /* | |
413 | * Check if retrieved coordinates match originals and are less than field | |
414 | * order: if not values are out of range. | |
415 | */ | |
416 | if (BN_cmp(x, tx) || BN_cmp(y, ty) | |
417 | || (BN_cmp(x, key->group->field) >= 0) | |
418 | || (BN_cmp(y, key->group->field) >= 0)) { | |
419 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES, | |
420 | EC_R_COORDINATES_OUT_OF_RANGE); | |
421 | goto err; | |
422 | } | |
423 | ||
424 | if (!EC_KEY_set_public_key(key, point)) | |
425 | goto err; | |
426 | ||
427 | if (EC_KEY_check_key(key) == 0) | |
428 | goto err; | |
429 | ||
430 | ok = 1; | |
431 | ||
432 | err: | |
23a1d5e9 | 433 | BN_CTX_free(ctx); |
8fdc3734 | 434 | EC_POINT_free(point); |
0f113f3e MC |
435 | return ok; |
436 | ||
437 | } | |
fef1c40b | 438 | |
9dd84053 | 439 | const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key) |
0f113f3e MC |
440 | { |
441 | return key->group; | |
442 | } | |
9dd84053 NL |
443 | |
444 | int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group) | |
0f113f3e | 445 | { |
91e7bcc2 | 446 | if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0) |
3475bc96 | 447 | return 0; |
8fdc3734 | 448 | EC_GROUP_free(key->group); |
0f113f3e MC |
449 | key->group = EC_GROUP_dup(group); |
450 | return (key->group == NULL) ? 0 : 1; | |
451 | } | |
9dd84053 NL |
452 | |
453 | const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key) | |
0f113f3e MC |
454 | { |
455 | return key->priv_key; | |
456 | } | |
9dd84053 NL |
457 | |
458 | int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key) | |
0f113f3e | 459 | { |
6903e2e7 DSH |
460 | if (key->group == NULL || key->group->meth == NULL) |
461 | return 0; | |
462 | if (key->group->meth->set_private | |
463 | && key->meth->set_private(key, priv_key) == 0) | |
464 | return 0; | |
91e7bcc2 DSH |
465 | if (key->meth->set_private != NULL |
466 | && key->meth->set_private(key, priv_key) == 0) | |
3475bc96 | 467 | return 0; |
23a1d5e9 | 468 | BN_clear_free(key->priv_key); |
0f113f3e MC |
469 | key->priv_key = BN_dup(priv_key); |
470 | return (key->priv_key == NULL) ? 0 : 1; | |
471 | } | |
9dd84053 NL |
472 | |
473 | const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key) | |
0f113f3e MC |
474 | { |
475 | return key->pub_key; | |
476 | } | |
9dd84053 NL |
477 | |
478 | int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key) | |
0f113f3e | 479 | { |
91e7bcc2 DSH |
480 | if (key->meth->set_public != NULL |
481 | && key->meth->set_public(key, pub_key) == 0) | |
3475bc96 | 482 | return 0; |
8fdc3734 | 483 | EC_POINT_free(key->pub_key); |
0f113f3e MC |
484 | key->pub_key = EC_POINT_dup(pub_key, key->group); |
485 | return (key->pub_key == NULL) ? 0 : 1; | |
486 | } | |
9dd84053 NL |
487 | |
488 | unsigned int EC_KEY_get_enc_flags(const EC_KEY *key) | |
0f113f3e MC |
489 | { |
490 | return key->enc_flag; | |
491 | } | |
9dd84053 NL |
492 | |
493 | void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags) | |
0f113f3e MC |
494 | { |
495 | key->enc_flag = flags; | |
496 | } | |
9dd84053 NL |
497 | |
498 | point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key) | |
0f113f3e MC |
499 | { |
500 | return key->conv_form; | |
501 | } | |
9dd84053 NL |
502 | |
503 | void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform) | |
0f113f3e MC |
504 | { |
505 | key->conv_form = cform; | |
506 | if (key->group != NULL) | |
507 | EC_GROUP_set_point_conversion_form(key->group, cform); | |
508 | } | |
9dd84053 | 509 | |
9dd84053 | 510 | void EC_KEY_set_asn1_flag(EC_KEY *key, int flag) |
0f113f3e MC |
511 | { |
512 | if (key->group != NULL) | |
513 | EC_GROUP_set_asn1_flag(key->group, flag); | |
514 | } | |
9dd84053 NL |
515 | |
516 | int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx) | |
0f113f3e MC |
517 | { |
518 | if (key->group == NULL) | |
519 | return 0; | |
520 | return EC_GROUP_precompute_mult(key->group, ctx); | |
521 | } | |
cac4fb58 DSH |
522 | |
523 | int EC_KEY_get_flags(const EC_KEY *key) | |
0f113f3e MC |
524 | { |
525 | return key->flags; | |
526 | } | |
cac4fb58 DSH |
527 | |
528 | void EC_KEY_set_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
529 | { |
530 | key->flags |= flags; | |
531 | } | |
cac4fb58 DSH |
532 | |
533 | void EC_KEY_clear_flags(EC_KEY *key, int flags) | |
0f113f3e MC |
534 | { |
535 | key->flags &= ~flags; | |
536 | } | |
981bd8a2 DSH |
537 | |
538 | size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form, | |
539 | unsigned char **pbuf, BN_CTX *ctx) | |
540 | { | |
541 | if (key == NULL || key->pub_key == NULL || key->group == NULL) | |
542 | return 0; | |
543 | return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx); | |
544 | } | |
545 | ||
546 | int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len, | |
547 | BN_CTX *ctx) | |
548 | { | |
549 | if (key == NULL || key->group == NULL) | |
550 | return 0; | |
551 | if (key->pub_key == NULL) | |
552 | key->pub_key = EC_POINT_new(key->group); | |
553 | if (key->pub_key == NULL) | |
554 | return 0; | |
6ea04154 DSH |
555 | if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0) |
556 | return 0; | |
557 | /* | |
558 | * Save the point conversion form. | |
559 | * For non-custom curves the first octet of the buffer (excluding | |
560 | * the last significant bit) contains the point conversion form. | |
561 | * EC_POINT_oct2point() has already performed sanity checking of | |
562 | * the buffer so we know it is valid. | |
563 | */ | |
564 | if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) | |
565 | key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01); | |
566 | return 1; | |
981bd8a2 | 567 | } |
cf241395 DSH |
568 | |
569 | size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len) | |
570 | { | |
907e9500 | 571 | size_t buf_len; |
cf241395 DSH |
572 | if (eckey->group == NULL || eckey->group->meth == NULL) |
573 | return 0; | |
6903e2e7 DSH |
574 | if (eckey->group->meth->priv2oct) |
575 | return eckey->group->meth->priv2oct(eckey, buf, len); | |
cf241395 DSH |
576 | |
577 | buf_len = (EC_GROUP_get_degree(eckey->group) + 7) / 8; | |
578 | if (eckey->priv_key == NULL) | |
579 | return 0; | |
580 | if (buf == NULL) | |
581 | return buf_len; | |
582 | else if (len < buf_len) | |
583 | return 0; | |
584 | ||
cf241395 DSH |
585 | /* Octetstring may need leading zeros if BN is to short */ |
586 | ||
907e9500 | 587 | if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) { |
d810700b | 588 | ECerr(EC_F_EC_KEY_PRIV2OCT, EC_R_BUFFER_TOO_SMALL); |
cf241395 DSH |
589 | return 0; |
590 | } | |
591 | ||
cf241395 DSH |
592 | return buf_len; |
593 | } | |
594 | ||
595 | int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len) | |
596 | { | |
597 | if (eckey->group == NULL || eckey->group->meth == NULL) | |
598 | return 0; | |
6903e2e7 DSH |
599 | if (eckey->group->meth->oct2priv) |
600 | return eckey->group->meth->oct2priv(eckey, buf, len); | |
cf241395 DSH |
601 | |
602 | if (eckey->priv_key == NULL) | |
603 | eckey->priv_key = BN_secure_new(); | |
604 | if (eckey->priv_key == NULL) { | |
d810700b | 605 | ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_MALLOC_FAILURE); |
cf241395 DSH |
606 | return 0; |
607 | } | |
608 | eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key); | |
609 | if (eckey->priv_key == NULL) { | |
d810700b | 610 | ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_BN_LIB); |
cf241395 DSH |
611 | return 0; |
612 | } | |
613 | return 1; | |
614 | } | |
7fc7d1a7 DSH |
615 | |
616 | size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf) | |
617 | { | |
618 | size_t len; | |
619 | unsigned char *buf; | |
620 | len = EC_KEY_priv2oct(eckey, NULL, 0); | |
afcee950 RS |
621 | if (len == 0) |
622 | return 0; | |
7fc7d1a7 DSH |
623 | buf = OPENSSL_malloc(len); |
624 | if (buf == NULL) | |
625 | return 0; | |
626 | len = EC_KEY_priv2oct(eckey, buf, len); | |
627 | if (len == 0) { | |
628 | OPENSSL_free(buf); | |
629 | return 0; | |
630 | } | |
631 | *pbuf = buf; | |
632 | return len; | |
633 | } |