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 * In addition, Sun covenants to all licensees who provide a reciprocal
13 * covenant with respect to their own patents if any, not to sue under
14 * current and future patent claims necessarily infringed by the making,
15 * using, practicing, selling, offering for sale and/or otherwise
16 * disposing of the ECC Code as delivered hereunder (or portions thereof),
17 * provided that such covenant shall not apply:
18 * 1) for code that a licensee deletes from the ECC Code;
19 * 2) separates from the ECC Code; or
20 * 3) for infringements caused by:
21 * i) the modification of the ECC Code or
22 * ii) the combination of the ECC Code with other software or
23 * devices where such combination causes the infringement.
25 * The ECDH software is originally written by Douglas Stebila of
26 * Sun Microsystems Laboratories.
29 /* ====================================================================
30 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
44 * 3. All advertising materials mentioning features or use of this
45 * software must display the following acknowledgment:
46 * "This product includes software developed by the OpenSSL Project
47 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
49 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
50 * endorse or promote products derived from this software without
51 * prior written permission. For written permission, please contact
52 * openssl-core@OpenSSL.org.
54 * 5. Products derived from this software may not be called "OpenSSL"
55 * nor may "OpenSSL" appear in their names without prior written
56 * permission of the OpenSSL Project.
58 * 6. Redistributions of any form whatsoever must retain the following
60 * "This product includes software developed by the OpenSSL Project
61 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
63 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
64 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
66 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
67 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
68 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
69 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
70 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
72 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
73 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
74 * OF THE POSSIBILITY OF SUCH DAMAGE.
75 * ====================================================================
77 * This product includes cryptographic software written by Eric Young
78 * (eay@cryptsoft.com). This product includes software written by Tim
79 * Hudson (tjh@cryptsoft.com).
85 #include <openssl/engine.h>
87 const char *ECDH_version="ECDH" OPENSSL_VERSION_PTEXT;
89 static void ecdh_finish(EC_KEY *);
91 static const ECDH_METHOD *default_ECDH_method = NULL;
93 void ECDH_set_default_method(const ECDH_METHOD *meth)
95 default_ECDH_method = meth;
98 const ECDH_METHOD *ECDH_get_default_method(void)
100 if(!default_ECDH_method)
101 default_ECDH_method = ECDH_OpenSSL();
102 return default_ECDH_method;
105 int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
107 const ECDH_METHOD *mtmp;
110 ecdh = ecdh_check(eckey);
122 ENGINE_finish(ecdh->engine);
133 ECDH_DATA *ECDH_DATA_new(void)
135 return ECDH_DATA_new_method(NULL);
138 ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine)
142 ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA));
145 ECDHerr(ECDH_F_ECDH_DATA_NEW, ERR_R_MALLOC_FAILURE);
150 ret->finish = ecdh_finish;
152 ret->meth = ECDH_get_default_method();
153 ret->engine = engine;
155 ret->engine = ENGINE_get_default_ECDH();
158 ret->meth = ENGINE_get_ECDH(ret->engine);
161 ECDHerr(ECDH_F_ECDH_DATA_NEW, ERR_R_ENGINE_LIB);
162 ENGINE_finish(ret->engine);
168 ret->flags = ret->meth->flags;
169 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
171 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
173 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
181 void ECDH_DATA_free(ECDH_DATA *r)
188 ENGINE_finish(r->engine);
190 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
192 memset((void *)r, 0x0, sizeof(ECDH_DATA));
197 ECDH_DATA *ecdh_check(EC_KEY *key)
201 if (key->meth_data->finish != ecdh_finish)
203 key->meth_data->finish(key);
204 key->meth_data = (EC_KEY_METH_DATA *)ECDH_DATA_new();
208 key->meth_data = (EC_KEY_METH_DATA *)ECDH_DATA_new();
209 return (ECDH_DATA *)key->meth_data;
212 static void ecdh_finish(EC_KEY *key)
214 if (key->meth_data && key->meth_data->finish == ecdh_finish)
215 ECDH_DATA_free((ECDH_DATA *)key->meth_data);
219 int ECDH_size(const EC_KEY *ecdh)
225 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
226 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
228 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
229 new_func, dup_func, free_func);
232 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
235 ecdh = ecdh_check(d);
238 return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg));
241 void *ECDH_get_ex_data(EC_KEY *d, int idx)
244 ecdh = ecdh_check(d);
247 return(CRYPTO_get_ex_data(&ecdh->ex_data,idx));