Allow IPv6 address entry in tools>ping - Loosens valid character check
[tomato/davidwu.git] / release / src / router / openssl / crypto / ec / ec_key.c
blobbf9fd2dc2c43c7101c08deffaeb03f9fbfe1a00e
1 /* crypto/ec/ec_key.c */
2 /*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5 /* ====================================================================
6 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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.
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/)"
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.
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.
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/)"
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 * ====================================================================
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).
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.
64 #include <string.h>
65 #include "ec_lcl.h"
66 #include <openssl/err.h>
67 #ifdef OPENSSL_FIPS
68 #include <openssl/fips.h>
69 #endif
71 EC_KEY *EC_KEY_new(void)
73 EC_KEY *ret;
75 ret=(EC_KEY *)OPENSSL_malloc(sizeof(EC_KEY));
76 if (ret == NULL)
78 ECerr(EC_F_EC_KEY_NEW, ERR_R_MALLOC_FAILURE);
79 return(NULL);
82 ret->version = 1;
83 ret->flags = 0;
84 ret->group = NULL;
85 ret->pub_key = NULL;
86 ret->priv_key= NULL;
87 ret->enc_flag= 0;
88 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
89 ret->references= 1;
90 ret->method_data = NULL;
91 return(ret);
94 EC_KEY *EC_KEY_new_by_curve_name(int nid)
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)
102 EC_KEY_free(ret);
103 return NULL;
105 return ret;
108 void EC_KEY_free(EC_KEY *r)
110 int i;
112 if (r == NULL) return;
114 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_EC);
115 #ifdef REF_PRINT
116 REF_PRINT("EC_KEY",r);
117 #endif
118 if (i > 0) return;
119 #ifdef REF_CHECK
120 if (i < 0)
122 fprintf(stderr,"EC_KEY_free, bad reference count\n");
123 abort();
125 #endif
127 if (r->group != NULL)
128 EC_GROUP_free(r->group);
129 if (r->pub_key != NULL)
130 EC_POINT_free(r->pub_key);
131 if (r->priv_key != NULL)
132 BN_clear_free(r->priv_key);
134 EC_EX_DATA_free_all_data(&r->method_data);
136 OPENSSL_cleanse((void *)r, sizeof(EC_KEY));
138 OPENSSL_free(r);
141 EC_KEY *EC_KEY_copy(EC_KEY *dest, const EC_KEY *src)
143 EC_EXTRA_DATA *d;
145 if (dest == NULL || src == NULL)
147 ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER);
148 return NULL;
150 /* copy the parameters */
151 if (src->group)
153 const EC_METHOD *meth = EC_GROUP_method_of(src->group);
154 /* clear the old group */
155 if (dest->group)
156 EC_GROUP_free(dest->group);
157 dest->group = EC_GROUP_new(meth);
158 if (dest->group == NULL)
159 return NULL;
160 if (!EC_GROUP_copy(dest->group, src->group))
161 return NULL;
163 /* copy the public key */
164 if (src->pub_key && src->group)
166 if (dest->pub_key)
167 EC_POINT_free(dest->pub_key);
168 dest->pub_key = EC_POINT_new(src->group);
169 if (dest->pub_key == NULL)
170 return NULL;
171 if (!EC_POINT_copy(dest->pub_key, src->pub_key))
172 return NULL;
174 /* copy the private key */
175 if (src->priv_key)
177 if (dest->priv_key == NULL)
179 dest->priv_key = BN_new();
180 if (dest->priv_key == NULL)
181 return NULL;
183 if (!BN_copy(dest->priv_key, src->priv_key))
184 return NULL;
186 /* copy method/extra data */
187 EC_EX_DATA_free_all_data(&dest->method_data);
189 for (d = src->method_data; d != NULL; d = d->next)
191 void *t = d->dup_func(d->data);
193 if (t == NULL)
194 return 0;
195 if (!EC_EX_DATA_set_data(&dest->method_data, t, d->dup_func, d->free_func, d->clear_free_func))
196 return 0;
199 /* copy the rest */
200 dest->enc_flag = src->enc_flag;
201 dest->conv_form = src->conv_form;
202 dest->version = src->version;
203 dest->flags = src->flags;
205 return dest;
208 EC_KEY *EC_KEY_dup(const EC_KEY *ec_key)
210 EC_KEY *ret = EC_KEY_new();
211 if (ret == NULL)
212 return NULL;
213 if (EC_KEY_copy(ret, ec_key) == NULL)
215 EC_KEY_free(ret);
216 return NULL;
218 return ret;
221 int EC_KEY_up_ref(EC_KEY *r)
223 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
224 #ifdef REF_PRINT
225 REF_PRINT("EC_KEY",r);
226 #endif
227 #ifdef REF_CHECK
228 if (i < 2)
230 fprintf(stderr, "EC_KEY_up, bad reference count\n");
231 abort();
233 #endif
234 return ((i > 1) ? 1 : 0);
237 int EC_KEY_generate_key(EC_KEY *eckey)
239 int ok = 0;
240 BN_CTX *ctx = NULL;
241 BIGNUM *priv_key = NULL, *order = NULL;
242 EC_POINT *pub_key = NULL;
244 #ifdef OPENSSL_FIPS
245 if (FIPS_mode())
246 return FIPS_ec_key_generate_key(eckey);
247 #endif
249 if (!eckey || !eckey->group)
251 ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
252 return 0;
255 if ((order = BN_new()) == NULL) goto err;
256 if ((ctx = BN_CTX_new()) == NULL) goto err;
258 if (eckey->priv_key == NULL)
260 priv_key = BN_new();
261 if (priv_key == NULL)
262 goto err;
264 else
265 priv_key = eckey->priv_key;
267 if (!EC_GROUP_get_order(eckey->group, order, ctx))
268 goto err;
271 if (!BN_rand_range(priv_key, order))
272 goto err;
273 while (BN_is_zero(priv_key));
275 if (eckey->pub_key == NULL)
277 pub_key = EC_POINT_new(eckey->group);
278 if (pub_key == NULL)
279 goto err;
281 else
282 pub_key = eckey->pub_key;
284 if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
285 goto err;
287 eckey->priv_key = priv_key;
288 eckey->pub_key = pub_key;
290 ok=1;
292 err:
293 if (order)
294 BN_free(order);
295 if (pub_key != NULL && eckey->pub_key == NULL)
296 EC_POINT_free(pub_key);
297 if (priv_key != NULL && eckey->priv_key == NULL)
298 BN_free(priv_key);
299 if (ctx != NULL)
300 BN_CTX_free(ctx);
301 return(ok);
304 int EC_KEY_check_key(const EC_KEY *eckey)
306 int ok = 0;
307 BN_CTX *ctx = NULL;
308 const BIGNUM *order = NULL;
309 EC_POINT *point = NULL;
311 if (!eckey || !eckey->group || !eckey->pub_key)
313 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
314 return 0;
317 if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key))
319 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_AT_INFINITY);
320 goto err;
323 if ((ctx = BN_CTX_new()) == NULL)
324 goto err;
325 if ((point = EC_POINT_new(eckey->group)) == NULL)
326 goto err;
328 /* testing whether the pub_key is on the elliptic curve */
329 if (!EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx))
331 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
332 goto err;
334 /* testing whether pub_key * order is the point at infinity */
335 order = &eckey->group->order;
336 if (BN_is_zero(order))
338 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
339 goto err;
341 if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx))
343 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
344 goto err;
346 if (!EC_POINT_is_at_infinity(eckey->group, point))
348 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
349 goto err;
351 /* in case the priv_key is present :
352 * check if generator * priv_key == pub_key
354 if (eckey->priv_key)
356 if (BN_cmp(eckey->priv_key, order) >= 0)
358 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
359 goto err;
361 if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
362 NULL, NULL, ctx))
364 ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
365 goto err;
367 if (EC_POINT_cmp(eckey->group, point, eckey->pub_key,
368 ctx) != 0)
370 ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
371 goto err;
374 ok = 1;
375 err:
376 if (ctx != NULL)
377 BN_CTX_free(ctx);
378 if (point != NULL)
379 EC_POINT_free(point);
380 return(ok);
383 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, BIGNUM *y)
385 BN_CTX *ctx = NULL;
386 BIGNUM *tx, *ty;
387 EC_POINT *point = NULL;
388 int ok = 0, tmp_nid, is_char_two = 0;
390 if (!key || !key->group || !x || !y)
392 ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
393 ERR_R_PASSED_NULL_PARAMETER);
394 return 0;
396 ctx = BN_CTX_new();
397 if (!ctx)
398 goto err;
400 point = EC_POINT_new(key->group);
402 if (!point)
403 goto err;
405 tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
407 if (tmp_nid == NID_X9_62_characteristic_two_field)
408 is_char_two = 1;
410 tx = BN_CTX_get(ctx);
411 ty = BN_CTX_get(ctx);
412 #ifndef OPENSSL_NO_EC2M
413 if (is_char_two)
415 if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
416 x, y, ctx))
417 goto err;
418 if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
419 tx, ty, ctx))
420 goto err;
422 else
423 #endif
425 if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
426 x, y, ctx))
427 goto err;
428 if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
429 tx, ty, ctx))
430 goto err;
432 /* Check if retrieved coordinates match originals: if not values
433 * are out of range.
435 if (BN_cmp(x, tx) || BN_cmp(y, ty))
437 ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
438 EC_R_COORDINATES_OUT_OF_RANGE);
439 goto err;
442 if (!EC_KEY_set_public_key(key, point))
443 goto err;
445 if (EC_KEY_check_key(key) == 0)
446 goto err;
448 ok = 1;
450 err:
451 if (ctx)
452 BN_CTX_free(ctx);
453 if (point)
454 EC_POINT_free(point);
455 return ok;
459 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key)
461 return key->group;
464 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group)
466 if (key->group != NULL)
467 EC_GROUP_free(key->group);
468 key->group = EC_GROUP_dup(group);
469 return (key->group == NULL) ? 0 : 1;
472 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key)
474 return key->priv_key;
477 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
479 if (key->priv_key)
480 BN_clear_free(key->priv_key);
481 key->priv_key = BN_dup(priv_key);
482 return (key->priv_key == NULL) ? 0 : 1;
485 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key)
487 return key->pub_key;
490 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key)
492 if (key->pub_key != NULL)
493 EC_POINT_free(key->pub_key);
494 key->pub_key = EC_POINT_dup(pub_key, key->group);
495 return (key->pub_key == NULL) ? 0 : 1;
498 unsigned int EC_KEY_get_enc_flags(const EC_KEY *key)
500 return key->enc_flag;
503 void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags)
505 key->enc_flag = flags;
508 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key)
510 return key->conv_form;
513 void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform)
515 key->conv_form = cform;
516 if (key->group != NULL)
517 EC_GROUP_set_point_conversion_form(key->group, cform);
520 void *EC_KEY_get_key_method_data(EC_KEY *key,
521 void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *))
523 return EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
526 void EC_KEY_insert_key_method_data(EC_KEY *key, void *data,
527 void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *))
529 EC_EXTRA_DATA *ex_data;
530 CRYPTO_w_lock(CRYPTO_LOCK_EC);
531 ex_data = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
532 if (ex_data == NULL)
533 EC_EX_DATA_set_data(&key->method_data, data, dup_func, free_func, clear_free_func);
534 CRYPTO_w_unlock(CRYPTO_LOCK_EC);
537 void EC_KEY_set_asn1_flag(EC_KEY *key, int flag)
539 if (key->group != NULL)
540 EC_GROUP_set_asn1_flag(key->group, flag);
543 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx)
545 if (key->group == NULL)
546 return 0;
547 return EC_GROUP_precompute_mult(key->group, ctx);
550 int EC_KEY_get_flags(const EC_KEY *key)
552 return key->flags;
555 void EC_KEY_set_flags(EC_KEY *key, int flags)
557 key->flags |= flags;
560 void EC_KEY_clear_flags(EC_KEY *key, int flags)
562 key->flags &= ~flags;