Line data Source code
1 : /* crypto/engine/tb_ecdh.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 engine software is originally written by Nils Gura and
13 : * Douglas Stebila of Sun Microsystems Laboratories.
14 : *
15 : */
16 : /* ====================================================================
17 : * Copyright (c) 2000-2002 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
39 : * licensing@OpenSSL.org.
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 : * (eay@cryptsoft.com). This product includes software written by Tim
66 : * Hudson (tjh@cryptsoft.com).
67 : *
68 : */
69 :
70 : #include "eng_int.h"
71 :
72 : /*
73 : * If this symbol is defined then ENGINE_get_default_ECDH(), the function
74 : * that is used by ECDH to hook in implementation code and cache defaults
75 : * (etc), will display brief debugging summaries to stderr with the 'nid'.
76 : */
77 : /* #define ENGINE_ECDH_DEBUG */
78 :
79 : static ENGINE_TABLE *ecdh_table = NULL;
80 : static const int dummy_nid = 1;
81 :
82 0 : void ENGINE_unregister_ECDH(ENGINE *e)
83 : {
84 0 : engine_table_unregister(&ecdh_table, e);
85 0 : }
86 :
87 0 : static void engine_unregister_all_ECDH(void)
88 : {
89 0 : engine_table_cleanup(&ecdh_table);
90 0 : }
91 :
92 0 : int ENGINE_register_ECDH(ENGINE *e)
93 : {
94 0 : if (e->ecdh_meth)
95 0 : return engine_table_register(&ecdh_table,
96 : engine_unregister_all_ECDH, e,
97 : &dummy_nid, 1, 0);
98 : return 1;
99 : }
100 :
101 0 : void ENGINE_register_all_ECDH()
102 : {
103 : ENGINE *e;
104 :
105 0 : for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
106 0 : ENGINE_register_ECDH(e);
107 0 : }
108 :
109 0 : int ENGINE_set_default_ECDH(ENGINE *e)
110 : {
111 0 : if (e->ecdh_meth)
112 0 : return engine_table_register(&ecdh_table,
113 : engine_unregister_all_ECDH, e,
114 : &dummy_nid, 1, 1);
115 : return 1;
116 : }
117 :
118 : /*
119 : * Exposed API function to get a functional reference from the implementation
120 : * table (ie. try to get a functional reference from the tabled structural
121 : * references).
122 : */
123 737 : ENGINE *ENGINE_get_default_ECDH(void)
124 : {
125 737 : return engine_table_select(&ecdh_table, dummy_nid);
126 : }
127 :
128 : /* Obtains an ECDH implementation from an ENGINE functional reference */
129 0 : const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e)
130 : {
131 0 : return e->ecdh_meth;
132 : }
133 :
134 : /* Sets an ECDH implementation in an ENGINE structure */
135 0 : int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth)
136 : {
137 0 : e->ecdh_meth = ecdh_meth;
138 0 : return 1;
139 : }
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