1 /* crypto/ecdh/ech_lib.c */
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 "ech_locl.h"
71 #include <string.h>
72 #ifndef OPENSSL_NO_ENGINE
73 #include <openssl/engine.h>
74 #endif
75 #include <openssl/err.h>
76
77 const char ECDH_version[]="ECDH" OPENSSL_VERSION_PTEXT;
78
79 static const ECDH_METHOD *default_ECDH_method = NULL;
80
81 static void *ecdh_data_new(void);
82 static void *ecdh_data_dup(void *);
83 static void ecdh_data_free(void *);
84
ECDH_set_default_method(const ECDH_METHOD * meth)85 void ECDH_set_default_method(const ECDH_METHOD *meth)
86 {
87 default_ECDH_method = meth;
88 }
89
ECDH_get_default_method(void)90 const ECDH_METHOD *ECDH_get_default_method(void)
91 {
92 if(!default_ECDH_method)
93 default_ECDH_method = ECDH_OpenSSL();
94 return default_ECDH_method;
95 }
96
ECDH_set_method(EC_KEY * eckey,const ECDH_METHOD * meth)97 int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
98 {
99 const ECDH_METHOD *mtmp;
100 ECDH_DATA *ecdh;
101
102 ecdh = ecdh_check(eckey);
103
104 if (ecdh == NULL)
105 return 0;
106
107 mtmp = ecdh->meth;
108 #if 0
109 if (mtmp->finish)
110 mtmp->finish(eckey);
111 #endif
112 #ifndef OPENSSL_NO_ENGINE
113 if (ecdh->engine)
114 {
115 ENGINE_finish(ecdh->engine);
116 ecdh->engine = NULL;
117 }
118 #endif
119 ecdh->meth = meth;
120 #if 0
121 if (meth->init)
122 meth->init(eckey);
123 #endif
124 return 1;
125 }
126
ECDH_DATA_new_method(ENGINE * engine)127 static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine)
128 {
129 ECDH_DATA *ret;
130
131 ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA));
132 if (ret == NULL)
133 {
134 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
135 return(NULL);
136 }
137
138 ret->init = NULL;
139
140 ret->meth = ECDH_get_default_method();
141 ret->engine = engine;
142 #ifndef OPENSSL_NO_ENGINE
143 if (!ret->engine)
144 ret->engine = ENGINE_get_default_ECDH();
145 if (ret->engine)
146 {
147 ret->meth = ENGINE_get_ECDH(ret->engine);
148 if (!ret->meth)
149 {
150 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
151 ENGINE_finish(ret->engine);
152 OPENSSL_free(ret);
153 return NULL;
154 }
155 }
156 #endif
157
158 ret->flags = ret->meth->flags;
159 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
160 #if 0
161 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
162 {
163 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
164 OPENSSL_free(ret);
165 ret=NULL;
166 }
167 #endif
168 return(ret);
169 }
170
ecdh_data_new(void)171 static void *ecdh_data_new(void)
172 {
173 return (void *)ECDH_DATA_new_method(NULL);
174 }
175
ecdh_data_dup(void * data)176 static void *ecdh_data_dup(void *data)
177 {
178 ECDH_DATA *r = (ECDH_DATA *)data;
179
180 /* XXX: dummy operation */
181 if (r == NULL)
182 return NULL;
183
184 return (void *)ecdh_data_new();
185 }
186
ecdh_data_free(void * data)187 void ecdh_data_free(void *data)
188 {
189 ECDH_DATA *r = (ECDH_DATA *)data;
190
191 #ifndef OPENSSL_NO_ENGINE
192 if (r->engine)
193 ENGINE_finish(r->engine);
194 #endif
195
196 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
197
198 OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA));
199
200 OPENSSL_free(r);
201 }
202
ecdh_check(EC_KEY * key)203 ECDH_DATA *ecdh_check(EC_KEY *key)
204 {
205 ECDH_DATA *ecdh_data;
206
207 void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
208 ecdh_data_free, ecdh_data_free);
209 if (data == NULL)
210 {
211 ecdh_data = (ECDH_DATA *)ecdh_data_new();
212 if (ecdh_data == NULL)
213 return NULL;
214 EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
215 ecdh_data_dup, ecdh_data_free, ecdh_data_free);
216 }
217 else
218 ecdh_data = (ECDH_DATA *)data;
219
220
221 return ecdh_data;
222 }
223
ECDH_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)224 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
225 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
226 {
227 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
228 new_func, dup_func, free_func);
229 }
230
ECDH_set_ex_data(EC_KEY * d,int idx,void * arg)231 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
232 {
233 ECDH_DATA *ecdh;
234 ecdh = ecdh_check(d);
235 if (ecdh == NULL)
236 return 0;
237 return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg));
238 }
239
ECDH_get_ex_data(EC_KEY * d,int idx)240 void *ECDH_get_ex_data(EC_KEY *d, int idx)
241 {
242 ECDH_DATA *ecdh;
243 ecdh = ecdh_check(d);
244 if (ecdh == NULL)
245 return NULL;
246 return(CRYPTO_get_ex_data(&ecdh->ex_data,idx));
247 }
248