tb_ecdsa.c revision 656d9c7f52f88b3a3daccafa7655dec086c4756e 
1/* ====================================================================
2 * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in
13 *    the documentation and/or other materials provided with the
14 *    distribution.
15 *
16 * 3. All advertising materials mentioning features or use of this
17 *    software must display the following acknowledgment:
18 *    "This product includes software developed by the OpenSSL Project
19 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20 *
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 *    endorse or promote products derived from this software without
23 *    prior written permission. For written permission, please contact
24 *    licensing@OpenSSL.org.
25 *
26 * 5. Products derived from this software may not be called "OpenSSL"
27 *    nor may "OpenSSL" appear in their names without prior written
28 *    permission of the OpenSSL Project.
29 *
30 * 6. Redistributions of any form whatsoever must retain the following
31 *    acknowledgment:
32 *    "This product includes software developed by the OpenSSL Project
33 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This product includes cryptographic software written by Eric Young
50 * (eay@cryptsoft.com).  This product includes software written by Tim
51 * Hudson (tjh@cryptsoft.com).
52 *
53 */
54
55#include "eng_int.h"
56
57/* If this symbol is defined then ENGINE_get_default_ECDSA(), the function that is
58 * used by ECDSA to hook in implementation code and cache defaults (etc), will
59 * display brief debugging summaries to stderr with the 'nid'. */
60/* #define ENGINE_ECDSA_DEBUG */
61
62static ENGINE_TABLE *ecdsa_table = NULL;
63static const int dummy_nid = 1;
64
65void ENGINE_unregister_ECDSA(ENGINE *e)
66	{
67	engine_table_unregister(&ecdsa_table, e);
68	}
69
70static void engine_unregister_all_ECDSA(void)
71	{
72	engine_table_cleanup(&ecdsa_table);
73	}
74
75int ENGINE_register_ECDSA(ENGINE *e)
76	{
77	if(e->ecdsa_meth)
78		return engine_table_register(&ecdsa_table,
79				engine_unregister_all_ECDSA, e, &dummy_nid, 1, 0);
80	return 1;
81	}
82
83void ENGINE_register_all_ECDSA()
84	{
85	ENGINE *e;
86
87	for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
88		ENGINE_register_ECDSA(e);
89	}
90
91int ENGINE_set_default_ECDSA(ENGINE *e)
92	{
93	if(e->ecdsa_meth)
94		return engine_table_register(&ecdsa_table,
95				engine_unregister_all_ECDSA, e, &dummy_nid, 1, 1);
96	return 1;
97	}
98
99/* Exposed API function to get a functional reference from the implementation
100 * table (ie. try to get a functional reference from the tabled structural
101 * references). */
102ENGINE *ENGINE_get_default_ECDSA(void)
103	{
104	return engine_table_select(&ecdsa_table, dummy_nid);
105	}
106
107/* Obtains an ECDSA implementation from an ENGINE functional reference */
108const ECDSA_METHOD *ENGINE_get_ECDSA(const ENGINE *e)
109	{
110	return e->ecdsa_meth;
111	}
112
113/* Sets an ECDSA implementation in an ENGINE structure */
114int ENGINE_set_ECDSA(ENGINE *e, const ECDSA_METHOD *ecdsa_meth)
115	{
116	e->ecdsa_meth = ecdsa_meth;
117	return 1;
118	}
119