1 | /* |
2 | * Copyright 2001-2018 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 | #include "eng_local.h" |
11 | |
12 | static ENGINE_TABLE *rand_table = NULL; |
13 | static const int dummy_nid = 1; |
14 | |
15 | void ENGINE_unregister_RAND(ENGINE *e) |
16 | { |
17 | engine_table_unregister(&rand_table, e); |
18 | } |
19 | |
20 | static void engine_unregister_all_RAND(void) |
21 | { |
22 | engine_table_cleanup(&rand_table); |
23 | } |
24 | |
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 | |
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 | |
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 | */ |
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 */ |
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 */ |
68 | int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth) |
69 | { |
70 | e->rand_meth = rand_meth; |
71 | return 1; |
72 | } |
73 | |