Branch data 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 : : /* If this symbol is defined then ENGINE_get_default_ECDH(), the function that is
73 : : * used by ECDH to hook in implementation code and cache defaults (etc), will
74 : : * display brief debugging summaries to stderr with the 'nid'. */
75 : : /* #define ENGINE_ECDH_DEBUG */
76 : :
77 : : static ENGINE_TABLE *ecdh_table = NULL;
78 : : static const int dummy_nid = 1;
79 : :
80 : 0 : void ENGINE_unregister_ECDH(ENGINE *e)
81 : : {
82 : 0 : engine_table_unregister(&ecdh_table, e);
83 : 0 : }
84 : :
85 : 0 : static void engine_unregister_all_ECDH(void)
86 : : {
87 : 0 : engine_table_cleanup(&ecdh_table);
88 : 0 : }
89 : :
90 : 8008 : int ENGINE_register_ECDH(ENGINE *e)
91 : : {
92 [ - + ]: 8008 : if(e->ecdh_meth)
93 : 0 : return engine_table_register(&ecdh_table,
94 : : engine_unregister_all_ECDH, e, &dummy_nid, 1, 0);
95 : : return 1;
96 : : }
97 : :
98 : 0 : void ENGINE_register_all_ECDH()
99 : : {
100 : : ENGINE *e;
101 : :
102 [ # # ]: 0 : for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
103 : 0 : ENGINE_register_ECDH(e);
104 : 0 : }
105 : :
106 : 1 : int ENGINE_set_default_ECDH(ENGINE *e)
107 : : {
108 [ - + ]: 1 : if(e->ecdh_meth)
109 : 0 : return engine_table_register(&ecdh_table,
110 : : engine_unregister_all_ECDH, e, &dummy_nid, 1, 1);
111 : : return 1;
112 : : }
113 : :
114 : : /* Exposed API function to get a functional reference from the implementation
115 : : * table (ie. try to get a functional reference from the tabled structural
116 : : * references). */
117 : 966 : ENGINE *ENGINE_get_default_ECDH(void)
118 : : {
119 : 966 : return engine_table_select(&ecdh_table, dummy_nid);
120 : : }
121 : :
122 : : /* Obtains an ECDH implementation from an ENGINE functional reference */
123 : 0 : const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e)
124 : : {
125 : 0 : return e->ecdh_meth;
126 : : }
127 : :
128 : : /* Sets an ECDH implementation in an ENGINE structure */
129 : 0 : int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth)
130 : : {
131 : 0 : e->ecdh_meth = ecdh_meth;
132 : 0 : return 1;
133 : : }
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