| 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 | |
| 13 | enum 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 | |
| 22 | extern 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); |
| 26 | int 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); |
| 30 | extern __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 | |
| 36 | static inline __init int load_module_cert(struct key *keyring) |
| 37 | { |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | #endif |
| 42 | |
| 43 | #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING |
| 44 | extern 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); |
| 49 | int 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); |
| 53 | void __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 |
| 57 | static 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 |
| 63 | extern 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); |
| 68 | extern 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 |
| 71 | static inline void __init set_machine_trusted_keys(struct key *keyring) |
| 72 | { |
| 73 | } |
| 74 | #endif |
| 75 | |
| 76 | extern struct pkcs7_message *pkcs7; |
| 77 | #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING |
| 78 | extern int mark_hash_blacklisted(const u8 *hash, size_t hash_len, |
| 79 | enum blacklist_hash_type hash_type); |
| 80 | extern int is_hash_blacklisted(const u8 *hash, size_t hash_len, |
| 81 | enum blacklist_hash_type hash_type); |
| 82 | extern int is_binary_blacklisted(const u8 *hash, size_t hash_len); |
| 83 | #else |
| 84 | static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len, |
| 85 | enum blacklist_hash_type hash_type) |
| 86 | { |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len) |
| 91 | { |
| 92 | return 0; |
| 93 | } |
| 94 | #endif |
| 95 | |
| 96 | #ifdef CONFIG_SYSTEM_REVOCATION_LIST |
| 97 | extern int add_key_to_revocation_list(const char *data, size_t size); |
| 98 | extern int is_key_on_revocation_list(struct pkcs7_message *pkcs7); |
| 99 | #else |
| 100 | static inline int add_key_to_revocation_list(const char *data, size_t size) |
| 101 | { |
| 102 | return 0; |
| 103 | } |
| 104 | static 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 |
| 111 | extern struct key *ima_blacklist_keyring; |
| 112 | |
| 113 | static inline struct key *get_ima_blacklist_keyring(void) |
| 114 | { |
| 115 | return ima_blacklist_keyring; |
| 116 | } |
| 117 | #else |
| 118 | static 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) |
| 126 | extern void __init set_platform_trusted_keys(struct key *keyring); |
| 127 | #else |
| 128 | static inline void set_platform_trusted_keys(struct key *keyring) |
| 129 | { |
| 130 | } |
| 131 | #endif |
| 132 | |
| 133 | #endif /* _KEYS_SYSTEM_KEYRING_H */ |