OpenSSL  1.0.1c
 All Classes Files Functions Variables Typedefs Enumerations Enumerator Macros
ech_key.c
Go to the documentation of this file.
1 /* crypto/ecdh/ecdh_key.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
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  * ([email protected]). This product includes software written by Tim
66  * Hudson ([email protected]).
67  *
68  */
69 
70 #include "ech_locl.h"
71 #ifndef OPENSSL_NO_ENGINE
72 #include <openssl/engine.h>
73 #endif
74 
75 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
76  EC_KEY *eckey,
77  void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen))
78 {
79  ECDH_DATA *ecdh = ecdh_check(eckey);
80  if (ecdh == NULL)
81  return 0;
82  return ecdh->meth->compute_key(out, outlen, pub_key, eckey, KDF);
83 }