1 /* crypto/engine/tb_ecdh.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 engine software is originally written by Nils Gura and
26 * Douglas Stebila of Sun Microsystems Laboratories.
29 /* ====================================================================
30 * Copyright (c) 2000-2002 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 * licensing@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).
83 #include <openssl/evp.h>
84 #include <openssl/engine.h>
87 /* If this symbol is defined then ENGINE_get_default_ECDH(), the function that is
88 * used by ECDH to hook in implementation code and cache defaults (etc), will
89 * display brief debugging summaries to stderr with the 'nid'. */
90 /* #define ENGINE_ECDH_DEBUG */
92 static ENGINE_TABLE *ecdh_table = NULL;
93 static const int dummy_nid = 1;
95 void ENGINE_unregister_ECDH(ENGINE *e)
97 engine_table_unregister(&ecdh_table, e);
100 static void engine_unregister_all_ECDH(void)
102 engine_table_cleanup(&ecdh_table);
105 int ENGINE_register_ECDH(ENGINE *e)
108 return engine_table_register(&ecdh_table,
109 &engine_unregister_all_ECDH, e, &dummy_nid, 1, 0);
113 void ENGINE_register_all_ECDH()
117 for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
118 ENGINE_register_ECDH(e);
121 int ENGINE_set_default_ECDH(ENGINE *e)
124 return engine_table_register(&ecdh_table,
125 &engine_unregister_all_ECDH, e, &dummy_nid, 1, 0);
129 /* Exposed API function to get a functional reference from the implementation
130 * table (ie. try to get a functional reference from the tabled structural
132 ENGINE *ENGINE_get_default_ECDH(void)
134 return engine_table_select(&ecdh_table, dummy_nid);
137 /* Obtains an ECDH implementation from an ENGINE functional reference */
138 const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e)
143 /* Sets an ECDH implementation in an ENGINE structure */
144 int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth)
146 e->ecdh_meth = ecdh_meth;