1 /*
2 * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 #include "eng_local.h"
11
12 static ENGINE_TABLE *rand_table = NULL;
13 static const int dummy_nid = 1;
14
ENGINE_unregister_RAND(ENGINE * e)15 void ENGINE_unregister_RAND(ENGINE *e)
16 {
17 engine_table_unregister(&rand_table, e);
18 }
19
engine_unregister_all_RAND(void)20 static void engine_unregister_all_RAND(void)
21 {
22 engine_table_cleanup(&rand_table);
23 }
24
ENGINE_register_RAND(ENGINE * e)25 int ENGINE_register_RAND(ENGINE *e)
26 {
27 if (e->rand_meth)
28 return engine_table_register(&rand_table,
29 engine_unregister_all_RAND, e,
30 &dummy_nid, 1, 0);
31 return 1;
32 }
33
ENGINE_register_all_RAND(void)34 void ENGINE_register_all_RAND(void)
35 {
36 ENGINE *e;
37
38 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
39 ENGINE_register_RAND(e);
40 }
41
ENGINE_set_default_RAND(ENGINE * e)42 int ENGINE_set_default_RAND(ENGINE *e)
43 {
44 if (e->rand_meth)
45 return engine_table_register(&rand_table,
46 engine_unregister_all_RAND, e,
47 &dummy_nid, 1, 1);
48 return 1;
49 }
50
51 /*
52 * Exposed API function to get a functional reference from the implementation
53 * table (ie. try to get a functional reference from the tabled structural
54 * references).
55 */
ENGINE_get_default_RAND(void)56 ENGINE *ENGINE_get_default_RAND(void)
57 {
58 return engine_table_select(&rand_table, dummy_nid);
59 }
60
61 /* Obtains an RAND implementation from an ENGINE functional reference */
ENGINE_get_RAND(const ENGINE * e)62 const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e)
63 {
64 return e->rand_meth;
65 }
66
67 /* Sets an RAND implementation in an ENGINE structure */
ENGINE_set_RAND(ENGINE * e,const RAND_METHOD * rand_meth)68 int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth)
69 {
70 e->rand_meth = rand_meth;
71 return 1;
72 }
73