Import OpenSSL-1.0.1d.
[dragonfly.git] / crypto / openssl / crypto / ecdsa / ecs_lib.c
CommitLineData
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1/* crypto/ecdsa/ecs_lib.c */
2/* ====================================================================
3 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
53 *
54 */
55
56#include <string.h>
57#include "ecs_locl.h"
58#ifndef OPENSSL_NO_ENGINE
59#include <openssl/engine.h>
60#endif
61#include <openssl/err.h>
62#include <openssl/bn.h>
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63#ifdef OPENSSL_FIPS
64#include <openssl/fips.h>
65#endif
56276539 66
e40c9513 67const char ECDSA_version[]="ECDSA" OPENSSL_VERSION_PTEXT;
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68
69static const ECDSA_METHOD *default_ECDSA_method = NULL;
70
71static void *ecdsa_data_new(void);
72static void *ecdsa_data_dup(void *);
73static void ecdsa_data_free(void *);
74
75void ECDSA_set_default_method(const ECDSA_METHOD *meth)
76{
77 default_ECDSA_method = meth;
78}
79
80const ECDSA_METHOD *ECDSA_get_default_method(void)
81{
82 if(!default_ECDSA_method)
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83 {
84#ifdef OPENSSL_FIPS
85 if (FIPS_mode())
86 return FIPS_ecdsa_openssl();
87 else
88 return ECDSA_OpenSSL();
89#else
56276539 90 default_ECDSA_method = ECDSA_OpenSSL();
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91#endif
92 }
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93 return default_ECDSA_method;
94}
95
96int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
97{
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98 ECDSA_DATA *ecdsa;
99
100 ecdsa = ecdsa_check(eckey);
101
102 if (ecdsa == NULL)
103 return 0;
104
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105#ifndef OPENSSL_NO_ENGINE
106 if (ecdsa->engine)
107 {
108 ENGINE_finish(ecdsa->engine);
109 ecdsa->engine = NULL;
110 }
111#endif
112 ecdsa->meth = meth;
113
114 return 1;
115}
116
117static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
118{
119 ECDSA_DATA *ret;
120
121 ret=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
122 if (ret == NULL)
123 {
124 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
125 return(NULL);
126 }
127
128 ret->init = NULL;
129
130 ret->meth = ECDSA_get_default_method();
131 ret->engine = engine;
132#ifndef OPENSSL_NO_ENGINE
133 if (!ret->engine)
134 ret->engine = ENGINE_get_default_ECDSA();
135 if (ret->engine)
136 {
137 ret->meth = ENGINE_get_ECDSA(ret->engine);
138 if (!ret->meth)
139 {
140 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
141 ENGINE_finish(ret->engine);
142 OPENSSL_free(ret);
143 return NULL;
144 }
145 }
146#endif
147
148 ret->flags = ret->meth->flags;
149 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
150#if 0
151 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
152 {
153 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
154 OPENSSL_free(ret);
155 ret=NULL;
156 }
157#endif
158 return(ret);
159}
160
161static void *ecdsa_data_new(void)
162{
163 return (void *)ECDSA_DATA_new_method(NULL);
164}
165
166static void *ecdsa_data_dup(void *data)
167{
168 ECDSA_DATA *r = (ECDSA_DATA *)data;
169
170 /* XXX: dummy operation */
171 if (r == NULL)
172 return NULL;
173
174 return ecdsa_data_new();
175}
176
177static void ecdsa_data_free(void *data)
178{
179 ECDSA_DATA *r = (ECDSA_DATA *)data;
180
181#ifndef OPENSSL_NO_ENGINE
182 if (r->engine)
183 ENGINE_finish(r->engine);
184#endif
185 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
186
187 OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
188
189 OPENSSL_free(r);
190}
191
192ECDSA_DATA *ecdsa_check(EC_KEY *key)
193{
194 ECDSA_DATA *ecdsa_data;
195
196 void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
197 ecdsa_data_free, ecdsa_data_free);
198 if (data == NULL)
199 {
200 ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
201 if (ecdsa_data == NULL)
202 return NULL;
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203 data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
204 ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
205 if (data != NULL)
206 {
207 /* Another thread raced us to install the key_method
208 * data and won. */
209 ecdsa_data_free(ecdsa_data);
210 ecdsa_data = (ECDSA_DATA *)data;
211 }
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212 }
213 else
214 ecdsa_data = (ECDSA_DATA *)data;
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215#ifdef OPENSSL_FIPS
216 if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD)
217 && !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW))
218 {
219 ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD);
220 return NULL;
221 }
222#endif
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223
224 return ecdsa_data;
225}
226
227int ECDSA_size(const EC_KEY *r)
228{
229 int ret,i;
230 ASN1_INTEGER bs;
231 BIGNUM *order=NULL;
232 unsigned char buf[4];
74093195 233 const EC_GROUP *group;
56276539 234
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235 if (r == NULL)
236 return 0;
237 group = EC_KEY_get0_group(r);
238 if (group == NULL)
56276539 239 return 0;
74093195 240
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241 if ((order = BN_new()) == NULL) return 0;
242 if (!EC_GROUP_get_order(group,order,NULL))
243 {
244 BN_clear_free(order);
245 return 0;
246 }
247 i=BN_num_bits(order);
248 bs.length=(i+7)/8;
249 bs.data=buf;
250 bs.type=V_ASN1_INTEGER;
251 /* If the top bit is set the asn1 encoding is 1 larger. */
252 buf[0]=0xff;
253
254 i=i2d_ASN1_INTEGER(&bs,NULL);
255 i+=i; /* r and s */
256 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
257 BN_clear_free(order);
258 return(ret);
259}
260
261
262int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
263 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
264{
265 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
266 new_func, dup_func, free_func);
267}
268
269int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
270{
271 ECDSA_DATA *ecdsa;
272 ecdsa = ecdsa_check(d);
273 if (ecdsa == NULL)
274 return 0;
275 return(CRYPTO_set_ex_data(&ecdsa->ex_data,idx,arg));
276}
277
278void *ECDSA_get_ex_data(EC_KEY *d, int idx)
279{
280 ECDSA_DATA *ecdsa;
281 ecdsa = ecdsa_check(d);
282 if (ecdsa == NULL)
283 return NULL;
284 return(CRYPTO_get_ex_data(&ecdsa->ex_data,idx));
285}