1 /* crypto/ecdh/ech_lib.c */
2 /* ====================================================================
3 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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.
9 * The ECC Code is licensed pursuant to the OpenSSL open source
10 * license provided below.
12 * The ECDH software is originally written by Douglas Stebila of
13 * Sun Microsystems Laboratories.
16 /* ====================================================================
17 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
45 * 6. Redistributions of any form whatsoever must retain the following
47 * "This product includes software developed by the OpenSSL Project
48 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
72 #ifndef OPENSSL_NO_ENGINE
73 # include <openssl/engine.h>
75 #include <openssl/err.h>
77 # include <openssl/fips.h>
80 const char ECDH_version[] = "ECDH" OPENSSL_VERSION_PTEXT;
82 static const ECDH_METHOD *default_ECDH_method = NULL;
84 static void *ecdh_data_new(void);
85 static void *ecdh_data_dup(void *);
86 static void ecdh_data_free(void *);
88 void ECDH_set_default_method(const ECDH_METHOD *meth)
90 default_ECDH_method = meth;
93 const ECDH_METHOD *ECDH_get_default_method(void)
95 if (!default_ECDH_method) {
98 return FIPS_ecdh_openssl();
100 return ECDH_OpenSSL();
102 default_ECDH_method = ECDH_OpenSSL();
105 return default_ECDH_method;
108 int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
112 ecdh = ecdh_check(eckey);
122 #ifndef OPENSSL_NO_ENGINE
124 ENGINE_finish(ecdh->engine);
136 static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine)
140 ret = (ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA));
142 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
148 ret->meth = ECDH_get_default_method();
149 ret->engine = engine;
150 #ifndef OPENSSL_NO_ENGINE
152 ret->engine = ENGINE_get_default_ECDH();
154 ret->meth = ENGINE_get_ECDH(ret->engine);
156 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
157 ENGINE_finish(ret->engine);
164 ret->flags = ret->meth->flags;
165 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
167 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
168 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
176 static void *ecdh_data_new(void)
178 return (void *)ECDH_DATA_new_method(NULL);
181 static void *ecdh_data_dup(void *data)
183 ECDH_DATA *r = (ECDH_DATA *)data;
185 /* XXX: dummy operation */
189 return (void *)ecdh_data_new();
192 void ecdh_data_free(void *data)
194 ECDH_DATA *r = (ECDH_DATA *)data;
196 #ifndef OPENSSL_NO_ENGINE
198 ENGINE_finish(r->engine);
201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
203 OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA));
208 ECDH_DATA *ecdh_check(EC_KEY *key)
210 ECDH_DATA *ecdh_data;
212 void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
213 ecdh_data_free, ecdh_data_free);
215 ecdh_data = (ECDH_DATA *)ecdh_data_new();
216 if (ecdh_data == NULL)
218 data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
219 ecdh_data_dup, ecdh_data_free,
223 * Another thread raced us to install the key_method data and
226 ecdh_data_free(ecdh_data);
227 ecdh_data = (ECDH_DATA *)data;
228 } else if (EC_KEY_get_key_method_data(key, ecdh_data_dup,
230 ecdh_data_free) != ecdh_data) {
231 /* Or an out of memory error in EC_KEY_insert_key_method_data. */
232 ecdh_data_free(ecdh_data);
236 ecdh_data = (ECDH_DATA *)data;
239 if (FIPS_mode() && !(ecdh_data->flags & ECDH_FLAG_FIPS_METHOD)
240 && !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW)) {
241 ECDHerr(ECDH_F_ECDH_CHECK, ECDH_R_NON_FIPS_METHOD);
249 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
250 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
252 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
253 new_func, dup_func, free_func);
256 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
259 ecdh = ecdh_check(d);
262 return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg));
265 void *ECDH_get_ex_data(EC_KEY *d, int idx)
268 ecdh = ecdh_check(d);
271 return (CRYPTO_get_ex_data(&ecdh->ex_data, idx));