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56939728 BM |
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 | * | |
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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 | |
40720ce3 | 24 | * notice, this list of conditions and the following disclaimer. |
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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 | ||
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70 | #include "eng_int.h" |
71 | ||
40720ce3 MC |
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 | */ | |
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77 | /* #define ENGINE_ECDH_DEBUG */ |
78 | ||
79 | static ENGINE_TABLE *ecdh_table = NULL; | |
80 | static const int dummy_nid = 1; | |
81 | ||
82 | void ENGINE_unregister_ECDH(ENGINE *e) | |
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83 | { |
84 | engine_table_unregister(&ecdh_table, e); | |
85 | } | |
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86 | |
87 | static void engine_unregister_all_ECDH(void) | |
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88 | { |
89 | engine_table_cleanup(&ecdh_table); | |
90 | } | |
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91 | |
92 | int ENGINE_register_ECDH(ENGINE *e) | |
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93 | { |
94 | if (e->ecdh_meth) | |
95 | return engine_table_register(&ecdh_table, | |
96 | engine_unregister_all_ECDH, e, | |
97 | &dummy_nid, 1, 0); | |
98 | return 1; | |
99 | } | |
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100 | |
101 | void ENGINE_register_all_ECDH() | |
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102 | { |
103 | ENGINE *e; | |
56939728 | 104 | |
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105 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
106 | ENGINE_register_ECDH(e); | |
107 | } | |
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108 | |
109 | int ENGINE_set_default_ECDH(ENGINE *e) | |
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110 | { |
111 | if (e->ecdh_meth) | |
112 | return engine_table_register(&ecdh_table, | |
113 | engine_unregister_all_ECDH, e, | |
114 | &dummy_nid, 1, 1); | |
115 | return 1; | |
116 | } | |
56939728 | 117 | |
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118 | /* |
119 | * Exposed API function to get a functional reference from the implementation | |
56939728 | 120 | * table (ie. try to get a functional reference from the tabled structural |
40720ce3 MC |
121 | * references). |
122 | */ | |
56939728 | 123 | ENGINE *ENGINE_get_default_ECDH(void) |
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124 | { |
125 | return engine_table_select(&ecdh_table, dummy_nid); | |
126 | } | |
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127 | |
128 | /* Obtains an ECDH implementation from an ENGINE functional reference */ | |
129 | const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e) | |
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130 | { |
131 | return e->ecdh_meth; | |
132 | } | |
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133 | |
134 | /* Sets an ECDH implementation in an ENGINE structure */ | |
135 | int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth) | |
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136 | { |
137 | e->ecdh_meth = ecdh_meth; | |
138 | return 1; | |
139 | } |