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 *digest_table = NULL;
16
ENGINE_unregister_digests(ENGINE * e)17 void ENGINE_unregister_digests(ENGINE *e)
18 {
19 engine_table_unregister(&digest_table, e);
20 }
21
engine_unregister_all_digests(void)22 static void engine_unregister_all_digests(void)
23 {
24 engine_table_cleanup(&digest_table);
25 }
26
ENGINE_register_digests(ENGINE * e)27 int ENGINE_register_digests(ENGINE *e)
28 {
29 if (e->digests) {
30 const int *nids;
31 int num_nids = e->digests(e, NULL, &nids, 0);
32 if (num_nids > 0)
33 return engine_table_register(&digest_table,
34 engine_unregister_all_digests, e,
35 nids, num_nids, 0);
36 }
37 return 1;
38 }
39
ENGINE_register_all_digests(void)40 void ENGINE_register_all_digests(void)
41 {
42 ENGINE *e;
43
44 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
45 ENGINE_register_digests(e);
46 }
47
ENGINE_set_default_digests(ENGINE * e)48 int ENGINE_set_default_digests(ENGINE *e)
49 {
50 if (e->digests) {
51 const int *nids;
52 int num_nids = e->digests(e, NULL, &nids, 0);
53 if (num_nids > 0)
54 return engine_table_register(&digest_table,
55 engine_unregister_all_digests, e,
56 nids, num_nids, 1);
57 }
58 return 1;
59 }
60
61 /*
62 * Exposed API function to get a functional reference from the implementation
63 * table (ie. try to get a functional reference from the tabled structural
64 * references) for a given digest 'nid'
65 */
ENGINE_get_digest_engine(int nid)66 ENGINE *ENGINE_get_digest_engine(int nid)
67 {
68 return ossl_engine_table_select(&digest_table, nid,
69 OPENSSL_FILE, OPENSSL_LINE);
70 }
71
72 /* Obtains a digest implementation from an ENGINE functional reference */
ENGINE_get_digest(ENGINE * e,int nid)73 const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid)
74 {
75 const EVP_MD *ret;
76 ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
77 if (!fn || !fn(e, &ret, NULL, nid)) {
78 ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_DIGEST);
79 return NULL;
80 }
81 return ret;
82 }
83
84 /* Gets the digest callback from an ENGINE structure */
ENGINE_get_digests(const ENGINE * e)85 ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e)
86 {
87 return e->digests;
88 }
89
90 /* Sets the digest callback in an ENGINE structure */
ENGINE_set_digests(ENGINE * e,ENGINE_DIGESTS_PTR f)91 int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
92 {
93 e->digests = f;
94 return 1;
95 }
96