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 const char *ECDH_version="ECDH" OPENSSL_VERSION_PTEXT;
79 static void ecdh_finish(EC_KEY *);
81 static const ECDH_METHOD *default_ECDH_method = NULL;
83 void ECDH_set_default_method(const ECDH_METHOD *meth)
85 default_ECDH_method = meth;
88 const ECDH_METHOD *ECDH_get_default_method(void)
90 if(!default_ECDH_method)
91 default_ECDH_method = ECDH_OpenSSL();
92 return default_ECDH_method;
95 int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
97 const ECDH_METHOD *mtmp;
100 ecdh = ecdh_check(eckey);
110 #ifndef OPENSSL_NO_ENGINE
113 ENGINE_finish(ecdh->engine);
125 ECDH_DATA *ECDH_DATA_new(void)
127 return ECDH_DATA_new_method(NULL);
130 ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine)
134 ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA));
137 ECDHerr(ECDH_F_ECDH_DATA_NEW, ERR_R_MALLOC_FAILURE);
142 ret->finish = ecdh_finish;
144 ret->meth = ECDH_get_default_method();
145 ret->engine = engine;
146 #ifndef OPENSSL_NO_ENGINE
148 ret->engine = ENGINE_get_default_ECDH();
151 ret->meth = ENGINE_get_ECDH(ret->engine);
154 ECDHerr(ECDH_F_ECDH_DATA_NEW, ERR_R_ENGINE_LIB);
155 ENGINE_finish(ret->engine);
162 ret->flags = ret->meth->flags;
163 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
165 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
167 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
175 void ECDH_DATA_free(ECDH_DATA *r)
181 #ifndef OPENSSL_NO_ENGINE
183 ENGINE_finish(r->engine);
186 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
188 OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA));
193 ECDH_DATA *ecdh_check(EC_KEY *key)
197 if (key->meth_data->finish != ecdh_finish)
199 key->meth_data->finish(key);
200 key->meth_data = (EC_KEY_METH_DATA *)ECDH_DATA_new();
204 key->meth_data = (EC_KEY_METH_DATA *)ECDH_DATA_new();
205 return (ECDH_DATA *)key->meth_data;
208 static void ecdh_finish(EC_KEY *key)
210 if (key->meth_data && key->meth_data->finish == ecdh_finish)
211 ECDH_DATA_free((ECDH_DATA *)key->meth_data);
215 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
216 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
218 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
219 new_func, dup_func, free_func);
222 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
225 ecdh = ecdh_check(d);
228 return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg));
231 void *ECDH_get_ex_data(EC_KEY *d, int idx)
234 ecdh = ecdh_check(d);
237 return(CRYPTO_get_ex_data(&ecdh->ex_data,idx));