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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* System keyring containing trusted public keys.
3 *
4 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#ifndef _KEYS_SYSTEM_KEYRING_H
9#define _KEYS_SYSTEM_KEYRING_H
10
11#include <linux/key.h>
12
13enum blacklist_hash_type {
14 /* TBSCertificate hash */
15 BLACKLIST_HASH_X509_TBS = 1,
16 /* Raw data hash */
17 BLACKLIST_HASH_BINARY = 2,
18};
19
20#ifdef CONFIG_SYSTEM_TRUSTED_KEYRING
21
22extern int restrict_link_by_builtin_trusted(struct key *keyring,
23 const struct key_type *type,
24 const union key_payload *payload,
25 struct key *restriction_key);
26int restrict_link_by_digsig_builtin(struct key *dest_keyring,
27 const struct key_type *type,
28 const union key_payload *payload,
29 struct key *restriction_key);
30extern __init int load_module_cert(struct key *keyring);
31
32#else
33#define restrict_link_by_builtin_trusted restrict_link_reject
34#define restrict_link_by_digsig_builtin restrict_link_reject
35
36static inline __init int load_module_cert(struct key *keyring)
37{
38 return 0;
39}
40
41#endif
42
43#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
44extern int restrict_link_by_builtin_and_secondary_trusted(
45 struct key *keyring,
46 const struct key_type *type,
47 const union key_payload *payload,
48 struct key *restriction_key);
49int restrict_link_by_digsig_builtin_and_secondary(struct key *keyring,
50 const struct key_type *type,
51 const union key_payload *payload,
52 struct key *restriction_key);
53void __init add_to_secondary_keyring(const char *source, const void *data, size_t len);
54#else
55#define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
56#define restrict_link_by_digsig_builtin_and_secondary restrict_link_by_digsig_builtin
57static inline void __init add_to_secondary_keyring(const char *source, const void *data, size_t len)
58{
59}
60#endif
61
62#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
63extern int restrict_link_by_builtin_secondary_and_machine(
64 struct key *dest_keyring,
65 const struct key_type *type,
66 const union key_payload *payload,
67 struct key *restrict_key);
68extern void __init set_machine_trusted_keys(struct key *keyring);
69#else
70#define restrict_link_by_builtin_secondary_and_machine restrict_link_by_builtin_trusted
71static inline void __init set_machine_trusted_keys(struct key *keyring)
72{
73}
74#endif
75
76#ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
77extern int mark_hash_blacklisted(const u8 *hash, size_t hash_len,
78 enum blacklist_hash_type hash_type);
79extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
80 enum blacklist_hash_type hash_type);
81extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
82#else
83static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
84 enum blacklist_hash_type hash_type)
85{
86 return 0;
87}
88
89static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len)
90{
91 return 0;
92}
93#endif
94
95struct pkcs7_message;
96#ifdef CONFIG_SYSTEM_REVOCATION_LIST
97extern int add_key_to_revocation_list(const char *data, size_t size);
98extern int is_key_on_revocation_list(struct pkcs7_message *pkcs7);
99#else
100static inline int add_key_to_revocation_list(const char *data, size_t size)
101{
102 return 0;
103}
104static inline int is_key_on_revocation_list(struct pkcs7_message *pkcs7)
105{
106 return -ENOKEY;
107}
108#endif
109
110#ifdef CONFIG_IMA_BLACKLIST_KEYRING
111extern struct key *ima_blacklist_keyring;
112
113static inline struct key *get_ima_blacklist_keyring(void)
114{
115 return ima_blacklist_keyring;
116}
117#else
118static inline struct key *get_ima_blacklist_keyring(void)
119{
120 return NULL;
121}
122#endif /* CONFIG_IMA_BLACKLIST_KEYRING */
123
124#if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \
125 defined(CONFIG_SYSTEM_TRUSTED_KEYRING)
126extern void __init set_platform_trusted_keys(struct key *keyring);
127#else
128static inline void set_platform_trusted_keys(struct key *keyring)
129{
130}
131#endif
132
133#endif /* _KEYS_SYSTEM_KEYRING_H */