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 *digest_table = NULL; |
13 | |
14 | void ENGINE_unregister_digests(ENGINE *e) |
15 | { |
16 | engine_table_unregister(&digest_table, e); |
17 | } |
18 | |
19 | static void engine_unregister_all_digests(void) |
20 | { |
21 | engine_table_cleanup(&digest_table); |
22 | } |
23 | |
24 | int ENGINE_register_digests(ENGINE *e) |
25 | { |
26 | if (e->digests) { |
27 | const int *nids; |
28 | int num_nids = e->digests(e, NULL, &nids, 0); |
29 | if (num_nids > 0) |
30 | return engine_table_register(&digest_table, |
31 | engine_unregister_all_digests, e, |
32 | nids, num_nids, 0); |
33 | } |
34 | return 1; |
35 | } |
36 | |
37 | void ENGINE_register_all_digests(void) |
38 | { |
39 | ENGINE *e; |
40 | |
41 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
42 | ENGINE_register_digests(e); |
43 | } |
44 | |
45 | int ENGINE_set_default_digests(ENGINE *e) |
46 | { |
47 | if (e->digests) { |
48 | const int *nids; |
49 | int num_nids = e->digests(e, NULL, &nids, 0); |
50 | if (num_nids > 0) |
51 | return engine_table_register(&digest_table, |
52 | engine_unregister_all_digests, e, |
53 | nids, num_nids, 1); |
54 | } |
55 | return 1; |
56 | } |
57 | |
58 | /* |
59 | * Exposed API function to get a functional reference from the implementation |
60 | * table (ie. try to get a functional reference from the tabled structural |
61 | * references) for a given digest 'nid' |
62 | */ |
63 | ENGINE *ENGINE_get_digest_engine(int nid) |
64 | { |
65 | return engine_table_select(&digest_table, nid); |
66 | } |
67 | |
68 | /* Obtains a digest implementation from an ENGINE functional reference */ |
69 | const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid) |
70 | { |
71 | const EVP_MD *ret; |
72 | ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e); |
73 | if (!fn || !fn(e, &ret, NULL, nid)) { |
74 | ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST, ENGINE_R_UNIMPLEMENTED_DIGEST); |
75 | return NULL; |
76 | } |
77 | return ret; |
78 | } |
79 | |
80 | /* Gets the digest callback from an ENGINE structure */ |
81 | ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e) |
82 | { |
83 | return e->digests; |
84 | } |
85 | |
86 | /* Sets the digest callback in an ENGINE structure */ |
87 | int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f) |
88 | { |
89 | e->digests = f; |
90 | return 1; |
91 | } |
92 | |