1132718Skan/* ====================================================================
2117395Skan * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
3117395Skan *
4132718Skan * Redistribution and use in source and binary forms, with or without
5117395Skan * modification, are permitted provided that the following conditions
6132718Skan * are met:
7117395Skan *
8117395Skan * 1. Redistributions of source code must retain the above copyright
9117395Skan *    notice, this list of conditions and the following disclaimer.
10117395Skan *
11132718Skan * 2. Redistributions in binary form must reproduce the above copyright
12117395Skan *    notice, this list of conditions and the following disclaimer in
13117395Skan *    the documentation and/or other materials provided with the
14117395Skan *    distribution.
15117395Skan *
16117395Skan * 3. All advertising materials mentioning features or use of this
17132718Skan *    software must display the following acknowledgment:
18117395Skan *    "This product includes software developed by the OpenSSL Project
19117395Skan *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20117395Skan *
21132718Skan * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22132718Skan *    endorse or promote products derived from this software without
23132718Skan *    prior written permission. For written permission, please contact
24132718Skan *    licensing@OpenSSL.org.
25132718Skan *
26132718Skan * 5. Products derived from this software may not be called "OpenSSL"
27132718Skan *    nor may "OpenSSL" appear in their names without prior written
28132718Skan *    permission of the OpenSSL Project.
29132718Skan *
30132718Skan * 6. Redistributions of any form whatsoever must retain the following
31132718Skan *    acknowledgment:
32132718Skan *    "This product includes software developed by the OpenSSL Project
33132718Skan *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34132718Skan *
35132718Skan * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36132718Skan * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37117395Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38117395Skan * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
39117395Skan * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40117395Skan * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41117395Skan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42117395Skan * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43117395Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44117395Skan * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45117395Skan * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46132718Skan * OF THE POSSIBILITY OF SUCH DAMAGE.
47117395Skan * ====================================================================
48117395Skan *
49117395Skan * This product includes cryptographic software written by Eric Young
50132718Skan * (eay@cryptsoft.com).  This product includes software written by Tim
51117395Skan * Hudson (tjh@cryptsoft.com).
52117395Skan *
53117395Skan */
54117395Skan
55117395Skan#include "eng_int.h"
56117395Skan
57132718Skan/* If this symbol is defined then ENGINE_get_default_DSA(), the function that is
58132718Skan * used by DSA to hook in implementation code and cache defaults (etc), will
59132718Skan * display brief debugging summaries to stderr with the 'nid'. */
60132718Skan/* #define ENGINE_DSA_DEBUG */
61132718Skan
62132718Skanstatic ENGINE_TABLE *dsa_table = NULL;
63static const int dummy_nid = 1;
64
65void ENGINE_unregister_DSA(ENGINE *e)
66	{
67	engine_table_unregister(&dsa_table, e);
68	}
69
70static void engine_unregister_all_DSA(void)
71	{
72	engine_table_cleanup(&dsa_table);
73	}
74
75int ENGINE_register_DSA(ENGINE *e)
76	{
77	if(e->dsa_meth)
78		return engine_table_register(&dsa_table,
79				engine_unregister_all_DSA, e, &dummy_nid, 1, 0);
80	return 1;
81	}
82
83void ENGINE_register_all_DSA()
84	{
85	ENGINE *e;
86
87	for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
88		ENGINE_register_DSA(e);
89	}
90
91int ENGINE_set_default_DSA(ENGINE *e)
92	{
93	if(e->dsa_meth)
94		return engine_table_register(&dsa_table,
95				engine_unregister_all_DSA, 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_DSA(void)
103	{
104	return engine_table_select(&dsa_table, dummy_nid);
105	}
106
107/* Obtains an DSA implementation from an ENGINE functional reference */
108const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e)
109	{
110	return e->dsa_meth;
111	}
112
113/* Sets an DSA implementation in an ENGINE structure */
114int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
115	{
116	e->dsa_meth = dsa_meth;
117	return 1;
118	}
119