1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015 Juniper Networks, Inc.
6 * Petko Manolov <petko.manolov@konsulko.com>
9 #include <linux/export.h>
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/cred.h>
13 #include <linux/err.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <keys/system_keyring.h>
19 static struct key_acl integrity_blacklist_keyring_acl = {
20 .usage = REFCOUNT_INIT(1),
23 KEY_POSSESSOR_ACE(KEY_ACE_SEARCH | KEY_ACE_WRITE),
24 KEY_OWNER_ACE(KEY_ACE_VIEW | KEY_ACE_READ | KEY_ACE_WRITE | KEY_ACE_SEARCH),
28 struct key *ima_blacklist_keyring;
31 * Allocate the IMA blacklist keyring
33 __init int ima_mok_init(void)
35 struct key_restriction *restriction;
37 pr_notice("Allocating IMA blacklist keyring.\n");
39 restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
41 panic("Can't allocate IMA blacklist restriction.");
43 restriction->check = restrict_link_by_builtin_trusted;
45 ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
46 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
47 &integrity_blacklist_keyring_acl,
48 KEY_ALLOC_NOT_IN_QUOTA,
51 if (IS_ERR(ima_blacklist_keyring))
52 panic("Can't allocate IMA blacklist keyring.");
54 set_bit(KEY_FLAG_KEEP, &ima_blacklist_keyring->flags);
57 device_initcall(ima_mok_init);