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diff --git a/src/lib/libcrypto/ecdh/ech_lib.c b/src/lib/libcrypto/ecdh/ech_lib.c
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1/* $OpenBSD: ech_lib.c,v 1.11 2015/09/13 12:03:07 jsing Exp $ */
2/* ====================================================================
3 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
4 *
5 * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
6 * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
7 * to the OpenSSL project.
8 *
9 * The ECC Code is licensed pursuant to the OpenSSL open source
10 * license provided below.
11 *
12 * The ECDH software is originally written by Douglas Stebila of
13 * Sun Microsystems Laboratories.
14 *
15 */
16/* ====================================================================
17 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 *
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 *
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 *
31 * 3. All advertising materials mentioning features or use of this
32 * software must display the following acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
35 *
36 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
37 * endorse or promote products derived from this software without
38 * prior written permission. For written permission, please contact
39 * openssl-core@OpenSSL.org.
40 *
41 * 5. Products derived from this software may not be called "OpenSSL"
42 * nor may "OpenSSL" appear in their names without prior written
43 * permission of the OpenSSL Project.
44 *
45 * 6. Redistributions of any form whatsoever must retain the following
46 * acknowledgment:
47 * "This product includes software developed by the OpenSSL Project
48 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
51 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
53 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
54 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
57 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
59 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
60 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
61 * OF THE POSSIBILITY OF SUCH DAMAGE.
62 * ====================================================================
63 *
64 * This product includes cryptographic software written by Eric Young
65 * (eay@cryptsoft.com). This product includes software written by Tim
66 * Hudson (tjh@cryptsoft.com).
67 *
68 */
69
70#include <string.h>
71
72#include <openssl/opensslconf.h>
73
74#include "ech_locl.h"
75#ifndef OPENSSL_NO_ENGINE
76#include <openssl/engine.h>
77#endif
78#include <openssl/err.h>
79
80static const ECDH_METHOD *default_ECDH_method = NULL;
81
82static void *ecdh_data_new(void);
83static void *ecdh_data_dup(void *);
84static void ecdh_data_free(void *);
85
86void
87ECDH_set_default_method(const ECDH_METHOD *meth)
88{
89 default_ECDH_method = meth;
90}
91
92const ECDH_METHOD *
93ECDH_get_default_method(void)
94{
95 if (!default_ECDH_method) {
96 default_ECDH_method = ECDH_OpenSSL();
97 }
98 return default_ECDH_method;
99}
100
101int
102ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
103{
104 ECDH_DATA *ecdh;
105
106 ecdh = ecdh_check(eckey);
107
108 if (ecdh == NULL)
109 return 0;
110
111#ifndef OPENSSL_NO_ENGINE
112 if (ecdh->engine) {
113 ENGINE_finish(ecdh->engine);
114 ecdh->engine = NULL;
115 }
116#endif
117 ecdh->meth = meth;
118 return 1;
119}
120
121static ECDH_DATA *
122ECDH_DATA_new_method(ENGINE *engine)
123{
124 ECDH_DATA *ret;
125
126 ret = malloc(sizeof(ECDH_DATA));
127 if (ret == NULL) {
128 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
129 return (NULL);
130 }
131
132 ret->init = NULL;
133
134 ret->meth = ECDH_get_default_method();
135 ret->engine = engine;
136#ifndef OPENSSL_NO_ENGINE
137 if (!ret->engine)
138 ret->engine = ENGINE_get_default_ECDH();
139 if (ret->engine) {
140 ret->meth = ENGINE_get_ECDH(ret->engine);
141 if (!ret->meth) {
142 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
143 ENGINE_finish(ret->engine);
144 free(ret);
145 return NULL;
146 }
147 }
148#endif
149
150 ret->flags = ret->meth->flags;
151 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
152 return (ret);
153}
154
155static void *
156ecdh_data_new(void)
157{
158 return (void *)ECDH_DATA_new_method(NULL);
159}
160
161static void *
162ecdh_data_dup(void *data)
163{
164 ECDH_DATA *r = (ECDH_DATA *)data;
165
166 /* XXX: dummy operation */
167 if (r == NULL)
168 return NULL;
169
170 return (void *)ecdh_data_new();
171}
172
173void
174ecdh_data_free(void *data)
175{
176 ECDH_DATA *r = (ECDH_DATA *)data;
177
178#ifndef OPENSSL_NO_ENGINE
179 if (r->engine)
180 ENGINE_finish(r->engine);
181#endif
182
183 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
184
185 explicit_bzero((void *)r, sizeof(ECDH_DATA));
186
187 free(r);
188}
189
190ECDH_DATA *
191ecdh_check(EC_KEY *key)
192{
193 ECDH_DATA *ecdh_data;
194
195 void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
196 ecdh_data_free, ecdh_data_free);
197 if (data == NULL) {
198 ecdh_data = (ECDH_DATA *)ecdh_data_new();
199 if (ecdh_data == NULL)
200 return NULL;
201 data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
202 ecdh_data_dup, ecdh_data_free, ecdh_data_free);
203 if (data != NULL) {
204 /* Another thread raced us to install the key_method
205 * data and won. */
206 ecdh_data_free(ecdh_data);
207 ecdh_data = (ECDH_DATA *)data;
208 }
209 } else
210 ecdh_data = (ECDH_DATA *)data;
211
212 return ecdh_data;
213}
214
215int
216ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
217 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
218{
219 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
220 new_func, dup_func, free_func);
221}
222
223int
224ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
225{
226 ECDH_DATA *ecdh;
227 ecdh = ecdh_check(d);
228 if (ecdh == NULL)
229 return 0;
230 return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg));
231}
232
233void *
234ECDH_get_ex_data(EC_KEY *d, int idx)
235{
236 ECDH_DATA *ecdh;
237 ecdh = ecdh_check(d);
238 if (ecdh == NULL)
239 return NULL;
240 return (CRYPTO_get_ex_data(&ecdh->ex_data, idx));
241}
242
243int
244ECDH_size(const EC_KEY *d)
245{
246 return ((EC_GROUP_get_degree(EC_KEY_get0_group(d)) + 7) / 8);
247}