linux/include/keys/system_keyring.h
Nayna Jain 2434f7d2d4 certs: Add wrapper function to check blacklisted binary hash
The -EKEYREJECTED error returned by existing is_hash_blacklisted() is
misleading when called for checking against blacklisted hash of a
binary.

This patch adds a wrapper function is_binary_blacklisted() to return
-EPERM error if binary is blacklisted.

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1572492694-6520-7-git-send-email-zohar@linux.ibm.com
2019-11-12 12:25:50 +11:00

76 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/* System keyring containing trusted public keys.
*
* Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#ifndef _KEYS_SYSTEM_KEYRING_H
#define _KEYS_SYSTEM_KEYRING_H
#include <linux/key.h>
#ifdef CONFIG_SYSTEM_TRUSTED_KEYRING
extern int restrict_link_by_builtin_trusted(struct key *keyring,
const struct key_type *type,
const union key_payload *payload,
struct key *restriction_key);
#else
#define restrict_link_by_builtin_trusted restrict_link_reject
#endif
#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
extern int restrict_link_by_builtin_and_secondary_trusted(
struct key *keyring,
const struct key_type *type,
const union key_payload *payload,
struct key *restriction_key);
#else
#define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
#endif
#ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
extern int mark_hash_blacklisted(const char *hash);
extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
const char *type);
extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
#else
static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
const char *type)
{
return 0;
}
static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len)
{
return 0;
}
#endif
#ifdef CONFIG_IMA_BLACKLIST_KEYRING
extern struct key *ima_blacklist_keyring;
static inline struct key *get_ima_blacklist_keyring(void)
{
return ima_blacklist_keyring;
}
#else
static inline struct key *get_ima_blacklist_keyring(void)
{
return NULL;
}
#endif /* CONFIG_IMA_BLACKLIST_KEYRING */
#if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \
defined(CONFIG_SYSTEM_TRUSTED_KEYRING)
extern void __init set_platform_trusted_keys(struct key *keyring);
#else
static inline void set_platform_trusted_keys(struct key *keyring)
{
}
#endif
#endif /* _KEYS_SYSTEM_KEYRING_H */