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
15static ENGINE_TABLE *cipher_table = NULL;
16
17void ENGINE_unregister_ciphers(ENGINE *e)
18{
19    engine_table_unregister(&cipher_table, e);
20}
21
22static void engine_unregister_all_ciphers(void)
23{
24    engine_table_cleanup(&cipher_table);
25}
26
27int ENGINE_register_ciphers(ENGINE *e)
28{
29    if (e->ciphers) {
30        const int *nids;
31        int num_nids = e->ciphers(e, NULL, &nids, 0);
32        if (num_nids > 0)
33            return engine_table_register(&cipher_table,
34                                         engine_unregister_all_ciphers, e,
35                                         nids, num_nids, 0);
36    }
37    return 1;
38}
39
40void ENGINE_register_all_ciphers(void)
41{
42    ENGINE *e;
43
44    for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
45        ENGINE_register_ciphers(e);
46}
47
48int ENGINE_set_default_ciphers(ENGINE *e)
49{
50    if (e->ciphers) {
51        const int *nids;
52        int num_nids = e->ciphers(e, NULL, &nids, 0);
53        if (num_nids > 0)
54            return engine_table_register(&cipher_table,
55                                         engine_unregister_all_ciphers, 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 cipher 'nid'
65 */
66ENGINE *ENGINE_get_cipher_engine(int nid)
67{
68    return ossl_engine_table_select(&cipher_table, nid,
69                                    OPENSSL_FILE, OPENSSL_LINE);
70}
71
72/* Obtains a cipher implementation from an ENGINE functional reference */
73const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid)
74{
75    const EVP_CIPHER *ret;
76    ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e);
77    if (!fn || !fn(e, &ret, NULL, nid)) {
78        ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_CIPHER);
79        return NULL;
80    }
81    return ret;
82}
83
84/* Gets the cipher callback from an ENGINE structure */
85ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e)
86{
87    return e->ciphers;
88}
89
90/* Sets the cipher callback in an ENGINE structure */
91int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f)
92{
93    e->ciphers = f;
94    return 1;
95}
96