include/keys/system_keyring.h

   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 #ifdef CONFIG_SYSTEM_TRUSTED_KEYRING
  14
  15 extern int restrict_link_by_builtin_trusted(struct key *keyring,
  16                                             const struct key_type *type,
  17                                             const union key_payload *payload,
  18                                             struct key *restriction_key);
  19
  20 #else
  21 #define restrict_link_by_builtin_trusted restrict_link_reject
  22 #endif
  23
  24 #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
  25 extern int restrict_link_by_builtin_and_secondary_trusted(
  26         struct key *keyring,
  27         const struct key_type *type,
  28         const union key_payload *payload,
  29         struct key *restriction_key);
  30 #else
  31 #define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
  32 #endif
  33
  34 #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
  35 extern int mark_hash_blacklisted(const char *hash);
  36 extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
  37                                const char *type);
  38 extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
  39 #else
  40 static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
  41                                       const char *type)
  42 {
  43         return 0;
  44 }
  45
  46 static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len)
  47 {
  48         return 0;
  49 }
  50 #endif
  51
  52 #ifdef CONFIG_IMA_BLACKLIST_KEYRING
  53 extern struct key *ima_blacklist_keyring;
  54
  55 static inline struct key *get_ima_blacklist_keyring(void)
  56 {
  57         return ima_blacklist_keyring;
  58 }
  59 #else
  60 static inline struct key *get_ima_blacklist_keyring(void)
  61 {
  62         return NULL;
  63 }
  64 #endif /* CONFIG_IMA_BLACKLIST_KEYRING */
  65
  66 #if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \
  67         defined(CONFIG_SYSTEM_TRUSTED_KEYRING)
  68 extern void __init set_platform_trusted_keys(struct key *keyring);
  69 #else
  70 static inline void set_platform_trusted_keys(struct key *keyring)
  71 {
  72 }
  73 #endif
  74
  75 #endif /* _KEYS_SYSTEM_KEYRING_H */