summaryrefslogtreecommitdiff
path: root/lib/libcrypto/engine/tb_dsa.c
blob: 23e92361073ea9ff65019eb477f3c640e103e73b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
/* $OpenBSD: tb_dsa.c,v 1.7 2014/06/12 15:49:29 deraadt Exp $ */
/* ====================================================================
 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include "eng_int.h"

/* If this symbol is defined then ENGINE_get_default_DSA(), the function that is
 * used by DSA to hook in implementation code and cache defaults (etc), will
 * display brief debugging summaries to stderr with the 'nid'. */
/* #define ENGINE_DSA_DEBUG */

static ENGINE_TABLE *dsa_table = NULL;
static const int dummy_nid = 1;

void
ENGINE_unregister_DSA(ENGINE *e)
{
	engine_table_unregister(&dsa_table, e);
}

static void
engine_unregister_all_DSA(void)
{
	engine_table_cleanup(&dsa_table);
}

int
ENGINE_register_DSA(ENGINE *e)
{
	if (e->dsa_meth)
		return engine_table_register(&dsa_table,
		    engine_unregister_all_DSA, e, &dummy_nid, 1, 0);
	return 1;
}

void
ENGINE_register_all_DSA(void)
{
	ENGINE *e;

	for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
		ENGINE_register_DSA(e);
}

int
ENGINE_set_default_DSA(ENGINE *e)
{
	if (e->dsa_meth)
		return engine_table_register(&dsa_table,
		    engine_unregister_all_DSA, e, &dummy_nid, 1, 1);
	return 1;
}

/* Exposed API function to get a functional reference from the implementation
 * table (ie. try to get a functional reference from the tabled structural
 * references). */
ENGINE *
ENGINE_get_default_DSA(void)
{
	return engine_table_select(&dsa_table, dummy_nid);
}

/* Obtains an DSA implementation from an ENGINE functional reference */
const DSA_METHOD *
ENGINE_get_DSA(const ENGINE *e)
{
	return e->dsa_meth;
}

/* Sets an DSA implementation in an ENGINE structure */
int
ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
{
	e->dsa_meth = dsa_meth;
	return 1;
}