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 extern struct pkcs7_message *pkcs7;
  35 #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
  36 extern int mark_hash_blacklisted(const char *hash);
  37 extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
  38                                const char *type);
  39 extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
  40 #else
  41 static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
  42                                       const char *type)
  43 {
  44         return 0;
  45 }
  46
  47 static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len)
  48 {
  49         return 0;
  50 }
  51 #endif
  52
  53 #ifdef CONFIG_SYSTEM_REVOCATION_LIST
  54 extern int add_key_to_revocation_list(const char *data, size_t size);
  55 extern int is_key_on_revocation_list(struct pkcs7_message *pkcs7);
  56 #else
  57 static inline int add_key_to_revocation_list(const char *data, size_t size)
  58 {
  59         return 0;
  60 }
  61 static inline int is_key_on_revocation_list(struct pkcs7_message *pkcs7)
  62 {
  63         return -ENOKEY;
  64 }
  65 #endif
  66
  67 #ifdef CONFIG_IMA_BLACKLIST_KEYRING
  68 extern struct key *ima_blacklist_keyring;
  69
  70 static inline struct key *get_ima_blacklist_keyring(void)
  71 {
  72         return ima_blacklist_keyring;
  73 }
  74 #else
  75 static inline struct key *get_ima_blacklist_keyring(void)
  76 {
  77         return NULL;
  78 }
  79 #endif /* CONFIG_IMA_BLACKLIST_KEYRING */
  80
  81 #if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \
  82         defined(CONFIG_SYSTEM_TRUSTED_KEYRING)
  83 extern void __init set_platform_trusted_keys(struct key *keyring);
  84 #else
  85 static inline void set_platform_trusted_keys(struct key *keyring)
  86 {
  87 }
  88 #endif
  89
  90 #endif /* _KEYS_SYSTEM_KEYRING_H */