1 /*
2 * Copyright (C) 2015 Juniper Networks, Inc.
3 *
4 * Author:
5 * Petko Manolov <petko.manolov@konsulko.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, version 2 of the
10 * License.
11 *
12 */
13
14 #include <linux/export.h>
15 #include <linux/kernel.h>
16 #include <linux/sched.h>
17 #include <linux/cred.h>
18 #include <linux/err.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <keys/system_keyring.h>
22
23
24 struct key *ima_blacklist_keyring;
25
26 /*
27 * Allocate the IMA blacklist keyring
28 */
ima_mok_init(void)29 __init int ima_mok_init(void)
30 {
31 struct key_restriction *restriction;
32
33 pr_notice("Allocating IMA blacklist keyring.\n");
34
35 restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
36 if (!restriction)
37 panic("Can't allocate IMA blacklist restriction.");
38
39 restriction->check = restrict_link_by_builtin_trusted;
40
41 ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
42 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
43 (KEY_POS_ALL & ~KEY_POS_SETATTR) |
44 KEY_USR_VIEW | KEY_USR_READ |
45 KEY_USR_WRITE | KEY_USR_SEARCH,
46 KEY_ALLOC_NOT_IN_QUOTA,
47 restriction, NULL);
48
49 if (IS_ERR(ima_blacklist_keyring))
50 panic("Can't allocate IMA blacklist keyring.");
51
52 set_bit(KEY_FLAG_KEEP, &ima_blacklist_keyring->flags);
53 return 0;
54 }
55 device_initcall(ima_mok_init);
56
