1 /*
2 * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
12
13 #include "eng_local.h"
14
15 static ENGINE_TABLE *dh_table = NULL;
16 static const int dummy_nid = 1;
17
ENGINE_unregister_DH(ENGINE * e)18 void ENGINE_unregister_DH(ENGINE *e)
19 {
20 engine_table_unregister(&dh_table, e);
21 }
22
engine_unregister_all_DH(void)23 static void engine_unregister_all_DH(void)
24 {
25 engine_table_cleanup(&dh_table);
26 }
27
ENGINE_register_DH(ENGINE * e)28 int ENGINE_register_DH(ENGINE *e)
29 {
30 if (e->dh_meth)
31 return engine_table_register(&dh_table,
32 engine_unregister_all_DH, e, &dummy_nid,
33 1, 0);
34 return 1;
35 }
36
ENGINE_register_all_DH(void)37 void ENGINE_register_all_DH(void)
38 {
39 ENGINE *e;
40
41 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
42 ENGINE_register_DH(e);
43 }
44
ENGINE_set_default_DH(ENGINE * e)45 int ENGINE_set_default_DH(ENGINE *e)
46 {
47 if (e->dh_meth)
48 return engine_table_register(&dh_table,
49 engine_unregister_all_DH, e, &dummy_nid,
50 1, 1);
51 return 1;
52 }
53
54 /*
55 * Exposed API function to get a functional reference from the implementation
56 * table (ie. try to get a functional reference from the tabled structural
57 * references).
58 */
ENGINE_get_default_DH(void)59 ENGINE *ENGINE_get_default_DH(void)
60 {
61 return ossl_engine_table_select(&dh_table, dummy_nid,
62 OPENSSL_FILE, OPENSSL_LINE);
63 }
64
65 /* Obtains an DH implementation from an ENGINE functional reference */
ENGINE_get_DH(const ENGINE * e)66 const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
67 {
68 return e->dh_meth;
69 }
70
71 /* Sets an DH implementation in an ENGINE structure */
ENGINE_set_DH(ENGINE * e,const DH_METHOD * dh_meth)72 int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
73 {
74 e->dh_meth = dh_meth;
75 return 1;
76 }
77
