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Diffstat (limited to 'src/lib/libcrypto/ec/ec_key.c')
-rw-r--r--src/lib/libcrypto/ec/ec_key.c540
1 files changed, 0 insertions, 540 deletions
diff --git a/src/lib/libcrypto/ec/ec_key.c b/src/lib/libcrypto/ec/ec_key.c
deleted file mode 100644
index fa962e4d0f..0000000000
--- a/src/lib/libcrypto/ec/ec_key.c
+++ /dev/null
@@ -1,540 +0,0 @@
1/* $OpenBSD: ec_key.c,v 1.12 2015/09/10 15:56:25 jsing Exp $ */
2/*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5/* ====================================================================
6 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
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
13 * notice, this list of conditions and the following disclaimer.
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 */
58/* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * Portions originally developed by SUN MICROSYSTEMS, INC., and
61 * contributed to the OpenSSL project.
62 */
63
64#include <string.h>
65
66#include <openssl/opensslconf.h>
67
68#include "ec_lcl.h"
69#include <openssl/err.h>
70
71EC_KEY *
72EC_KEY_new(void)
73{
74 EC_KEY *ret;
75
76 ret = malloc(sizeof(EC_KEY));
77 if (ret == NULL) {
78 ECerr(EC_F_EC_KEY_NEW, ERR_R_MALLOC_FAILURE);
79 return (NULL);
80 }
81 ret->version = 1;
82 ret->flags = 0;
83 ret->group = NULL;
84 ret->pub_key = NULL;
85 ret->priv_key = NULL;
86 ret->enc_flag = 0;
87 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
88 ret->references = 1;
89 ret->method_data = NULL;
90 return (ret);
91}
92
93EC_KEY *
94EC_KEY_new_by_curve_name(int nid)
95{
96 EC_KEY *ret = EC_KEY_new();
97 if (ret == NULL)
98 return NULL;
99 ret->group = EC_GROUP_new_by_curve_name(nid);
100 if (ret->group == NULL) {
101 EC_KEY_free(ret);
102 return NULL;
103 }
104 return ret;
105}
106
107void
108EC_KEY_free(EC_KEY * r)
109{
110 int i;
111
112 if (r == NULL)
113 return;
114
115 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
116 if (i > 0)
117 return;
118
119 EC_GROUP_free(r->group);
120 EC_POINT_free(r->pub_key);
121 BN_clear_free(r->priv_key);
122
123 EC_EX_DATA_free_all_data(&r->method_data);
124
125 explicit_bzero((void *) r, sizeof(EC_KEY));
126
127 free(r);
128}
129
130EC_KEY *
131EC_KEY_copy(EC_KEY * dest, const EC_KEY * src)
132{
133 EC_EXTRA_DATA *d;
134
135 if (dest == NULL || src == NULL) {
136 ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER);
137 return NULL;
138 }
139 /* copy the parameters */
140 if (src->group) {
141 const EC_METHOD *meth = EC_GROUP_method_of(src->group);
142 /* clear the old group */
143 EC_GROUP_free(dest->group);
144 dest->group = EC_GROUP_new(meth);
145 if (dest->group == NULL)
146 return NULL;
147 if (!EC_GROUP_copy(dest->group, src->group))
148 return NULL;
149 }
150 /* copy the public key */
151 if (src->pub_key && src->group) {
152 EC_POINT_free(dest->pub_key);
153 dest->pub_key = EC_POINT_new(src->group);
154 if (dest->pub_key == NULL)
155 return NULL;
156 if (!EC_POINT_copy(dest->pub_key, src->pub_key))
157 return NULL;
158 }
159 /* copy the private key */
160 if (src->priv_key) {
161 if (dest->priv_key == NULL) {
162 dest->priv_key = BN_new();
163 if (dest->priv_key == NULL)
164 return NULL;
165 }
166 if (!BN_copy(dest->priv_key, src->priv_key))
167 return NULL;
168 }
169 /* copy method/extra data */
170 EC_EX_DATA_free_all_data(&dest->method_data);
171
172 for (d = src->method_data; d != NULL; d = d->next) {
173 void *t = d->dup_func(d->data);
174
175 if (t == NULL)
176 return 0;
177 if (!EC_EX_DATA_set_data(&dest->method_data, t, d->dup_func,
178 d->free_func, d->clear_free_func))
179 return 0;
180 }
181
182 /* copy the rest */
183 dest->enc_flag = src->enc_flag;
184 dest->conv_form = src->conv_form;
185 dest->version = src->version;
186 dest->flags = src->flags;
187
188 return dest;
189}
190
191EC_KEY *
192EC_KEY_dup(const EC_KEY * ec_key)
193{
194 EC_KEY *ret = EC_KEY_new();
195 if (ret == NULL)
196 return NULL;
197 if (EC_KEY_copy(ret, ec_key) == NULL) {
198 EC_KEY_free(ret);
199 return NULL;
200 }
201 return ret;
202}
203
204int
205EC_KEY_up_ref(EC_KEY * r)
206{
207 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
208 return ((i > 1) ? 1 : 0);
209}
210
211int
212EC_KEY_generate_key(EC_KEY * eckey)
213{
214 int ok = 0;
215 BN_CTX *ctx = NULL;
216 BIGNUM *priv_key = NULL, *order = NULL;
217 EC_POINT *pub_key = NULL;
218
219 if (!eckey || !eckey->group) {
220 ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
221 return 0;
222 }
223 if ((order = BN_new()) == NULL)
224 goto err;
225 if ((ctx = BN_CTX_new()) == NULL)
226 goto err;
227
228 if (eckey->priv_key == NULL) {
229 priv_key = BN_new();
230 if (priv_key == NULL)
231 goto err;
232 } else
233 priv_key = eckey->priv_key;
234
235 if (!EC_GROUP_get_order(eckey->group, order, ctx))
236 goto err;
237
238 do
239 if (!BN_rand_range(priv_key, order))
240 goto err;
241 while (BN_is_zero(priv_key));
242
243 if (eckey->pub_key == NULL) {
244 pub_key = EC_POINT_new(eckey->group);
245 if (pub_key == NULL)
246 goto err;
247 } else
248 pub_key = eckey->pub_key;
249
250 if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
251 goto err;
252
253 eckey->priv_key = priv_key;
254 eckey->pub_key = pub_key;
255
256 ok = 1;
257
258err:
259 BN_free(order);
260 if (pub_key != NULL && eckey->pub_key == NULL)
261 EC_POINT_free(pub_key);
262 if (priv_key != NULL && eckey->priv_key == NULL)
263 BN_free(priv_key);
264 BN_CTX_free(ctx);
265 return (ok);
266}
267
268int
269EC_KEY_check_key(const EC_KEY * eckey)
270{
271 int ok = 0;
272 BN_CTX *ctx = NULL;
273 const BIGNUM *order = NULL;
274 EC_POINT *point = NULL;
275
276 if (!eckey || !eckey->group || !eckey->pub_key) {
277 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
278 return 0;
279 }
280 if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key) > 0) {
281 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_AT_INFINITY);
282 goto err;
283 }
284 if ((ctx = BN_CTX_new()) == NULL)
285 goto err;
286 if ((point = EC_POINT_new(eckey->group)) == NULL)
287 goto err;
288
289 /* testing whether the pub_key is on the elliptic curve */
290 if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
291 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
292 goto err;
293 }
294 /* testing whether pub_key * order is the point at infinity */
295 order = &eckey->group->order;
296 if (BN_is_zero(order)) {
297 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
298 goto err;
299 }
300 if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
301 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
302 goto err;
303 }
304 if (EC_POINT_is_at_infinity(eckey->group, point) <= 0) {
305 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
306 goto err;
307 }
308 /*
309 * in case the priv_key is present : check if generator * priv_key ==
310 * pub_key
311 */
312 if (eckey->priv_key) {
313 if (BN_cmp(eckey->priv_key, order) >= 0) {
314 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
315 goto err;
316 }
317 if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
318 NULL, NULL, ctx)) {
319 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
320 goto err;
321 }
322 if (EC_POINT_cmp(eckey->group, point, eckey->pub_key,
323 ctx) != 0) {
324 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
325 goto err;
326 }
327 }
328 ok = 1;
329err:
330 BN_CTX_free(ctx);
331 EC_POINT_free(point);
332 return (ok);
333}
334
335int
336EC_KEY_set_public_key_affine_coordinates(EC_KEY * key, BIGNUM * x, BIGNUM * y)
337{
338 BN_CTX *ctx = NULL;
339 BIGNUM *tx, *ty;
340 EC_POINT *point = NULL;
341 int ok = 0, tmp_nid, is_char_two = 0;
342
343 if (!key || !key->group || !x || !y) {
344 ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
345 ERR_R_PASSED_NULL_PARAMETER);
346 return 0;
347 }
348 ctx = BN_CTX_new();
349 if (!ctx)
350 goto err;
351
352 point = EC_POINT_new(key->group);
353
354 if (!point)
355 goto err;
356
357 tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
358
359 if (tmp_nid == NID_X9_62_characteristic_two_field)
360 is_char_two = 1;
361
362 if ((tx = BN_CTX_get(ctx)) == NULL)
363 goto err;
364 if ((ty = BN_CTX_get(ctx)) == NULL)
365 goto err;
366
367#ifndef OPENSSL_NO_EC2M
368 if (is_char_two) {
369 if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
370 x, y, ctx))
371 goto err;
372 if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
373 tx, ty, ctx))
374 goto err;
375 } else
376#endif
377 {
378 if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
379 x, y, ctx))
380 goto err;
381 if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
382 tx, ty, ctx))
383 goto err;
384 }
385 /*
386 * Check if retrieved coordinates match originals: if not values are
387 * out of range.
388 */
389 if (BN_cmp(x, tx) || BN_cmp(y, ty)) {
390 ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
391 EC_R_COORDINATES_OUT_OF_RANGE);
392 goto err;
393 }
394 if (!EC_KEY_set_public_key(key, point))
395 goto err;
396
397 if (EC_KEY_check_key(key) == 0)
398 goto err;
399
400 ok = 1;
401
402err:
403 BN_CTX_free(ctx);
404 EC_POINT_free(point);
405 return ok;
406
407}
408
409const EC_GROUP *
410EC_KEY_get0_group(const EC_KEY * key)
411{
412 return key->group;
413}
414
415int
416EC_KEY_set_group(EC_KEY * key, const EC_GROUP * group)
417{
418 EC_GROUP_free(key->group);
419 key->group = EC_GROUP_dup(group);
420 return (key->group == NULL) ? 0 : 1;
421}
422
423const BIGNUM *
424EC_KEY_get0_private_key(const EC_KEY * key)
425{
426 return key->priv_key;
427}
428
429int
430EC_KEY_set_private_key(EC_KEY * key, const BIGNUM * priv_key)
431{
432 BN_clear_free(key->priv_key);
433 key->priv_key = BN_dup(priv_key);
434 return (key->priv_key == NULL) ? 0 : 1;
435}
436
437const EC_POINT *
438EC_KEY_get0_public_key(const EC_KEY * key)
439{
440 return key->pub_key;
441}
442
443int
444EC_KEY_set_public_key(EC_KEY * key, const EC_POINT * pub_key)
445{
446 EC_POINT_free(key->pub_key);
447 key->pub_key = EC_POINT_dup(pub_key, key->group);
448 return (key->pub_key == NULL) ? 0 : 1;
449}
450
451unsigned int
452EC_KEY_get_enc_flags(const EC_KEY * key)
453{
454 return key->enc_flag;
455}
456
457void
458EC_KEY_set_enc_flags(EC_KEY * key, unsigned int flags)
459{
460 key->enc_flag = flags;
461}
462
463point_conversion_form_t
464EC_KEY_get_conv_form(const EC_KEY * key)
465{
466 return key->conv_form;
467}
468
469void
470EC_KEY_set_conv_form(EC_KEY * key, point_conversion_form_t cform)
471{
472 key->conv_form = cform;
473 if (key->group != NULL)
474 EC_GROUP_set_point_conversion_form(key->group, cform);
475}
476
477void *
478EC_KEY_get_key_method_data(EC_KEY *key,
479 void *(*dup_func) (void *),
480 void (*free_func) (void *),
481 void (*clear_free_func) (void *))
482{
483 void *ret;
484
485 CRYPTO_r_lock(CRYPTO_LOCK_EC);
486 ret = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
487 CRYPTO_r_unlock(CRYPTO_LOCK_EC);
488
489 return ret;
490}
491
492void *
493EC_KEY_insert_key_method_data(EC_KEY * key, void *data,
494 void *(*dup_func) (void *),
495 void (*free_func) (void *),
496 void (*clear_free_func) (void *))
497{
498 EC_EXTRA_DATA *ex_data;
499
500 CRYPTO_w_lock(CRYPTO_LOCK_EC);
501 ex_data = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
502 if (ex_data == NULL)
503 EC_EX_DATA_set_data(&key->method_data, data, dup_func, free_func, clear_free_func);
504 CRYPTO_w_unlock(CRYPTO_LOCK_EC);
505
506 return ex_data;
507}
508
509void
510EC_KEY_set_asn1_flag(EC_KEY * key, int flag)
511{
512 if (key->group != NULL)
513 EC_GROUP_set_asn1_flag(key->group, flag);
514}
515
516int
517EC_KEY_precompute_mult(EC_KEY * key, BN_CTX * ctx)
518{
519 if (key->group == NULL)
520 return 0;
521 return EC_GROUP_precompute_mult(key->group, ctx);
522}
523
524int
525EC_KEY_get_flags(const EC_KEY * key)
526{
527 return key->flags;
528}
529
530void
531EC_KEY_set_flags(EC_KEY * key, int flags)
532{
533 key->flags |= flags;
534}
535
536void
537EC_KEY_clear_flags(EC_KEY * key, int flags)
538{
539 key->flags &= ~flags;
540}
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