1 /*	$OpenBSD: tb_eckey.c,v 1.2 2019/01/19 01:18:56 tb Exp $	*/
2 /* ====================================================================
3  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  *
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in
14  *    the documentation and/or other materials provided with the
15  *    distribution.
16  *
17  * 3. All advertising materials mentioning features or use of this
18  *    software must display the following acknowledgment:
19  *    "This product includes software developed by the OpenSSL Project
20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21  *
22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23  *    endorse or promote products derived from this software without
24  *    prior written permission. For written permission, please contact
25  *    licensing@OpenSSL.org.
26  *
27  * 5. Products derived from this software may not be called "OpenSSL"
28  *    nor may "OpenSSL" appear in their names without prior written
29  *    permission of the OpenSSL Project.
30  *
31  * 6. Redistributions of any form whatsoever must retain the following
32  *    acknowledgment:
33  *    "This product includes software developed by the OpenSSL Project
34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35  *
36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47  * OF THE POSSIBILITY OF SUCH DAMAGE.
48  * ====================================================================
49  *
50  * This product includes cryptographic software written by Eric Young
51  * (eay@cryptsoft.com).  This product includes software written by Tim
52  * Hudson (tjh@cryptsoft.com).
53  *
54  */
55 
56 #include "eng_int.h"
57 
58 static ENGINE_TABLE *ec_table = NULL;
59 static const int dummy_nid = 1;
60 
61 void
62 ENGINE_unregister_EC(ENGINE *e)
63 {
64 	engine_table_unregister(&ec_table, e);
65 }
66 
67 static void
68 engine_unregister_all_EC(void)
69 {
70 	engine_table_cleanup(&ec_table);
71 }
72 
73 int
74 ENGINE_register_EC(ENGINE *e)
75 {
76 	if (e->ec_meth)
77 		return engine_table_register(&ec_table,
78 		    engine_unregister_all_EC, e, &dummy_nid, 1, 0);
79 	return 1;
80 }
81 
82 void
83 ENGINE_register_all_EC(void)
84 {
85 	ENGINE *e;
86 
87 	for (e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e))
88 		ENGINE_register_EC(e);
89 }
90 
91 int
92 ENGINE_set_default_EC(ENGINE *e)
93 {
94 	if (e->ec_meth != NULL)
95 		return engine_table_register(&ec_table,
96 		    engine_unregister_all_EC, e, &dummy_nid, 1, 1);
97 	return 1;
98 }
99 
100 /*
101  * Exposed API function to get a functional reference from the implementation
102  * table (ie. try to get a functional reference from the tabled structural
103  * references).
104  */
105 ENGINE *
106 ENGINE_get_default_EC(void)
107 {
108 	return engine_table_select(&ec_table, dummy_nid);
109 }
110 
111 /* Obtains an EC_KEY implementation from an ENGINE functional reference */
112 const EC_KEY_METHOD *
113 ENGINE_get_EC(const ENGINE *e)
114 {
115 	return e->ec_meth;
116 }
117 
118 /* Sets an EC_KEY implementation in an ENGINE structure */
119 int
120 ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ec_meth)
121 {
122 	e->ec_meth = ec_meth;
123 	return 1;
124 }
125