1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 Juniper Networks, Inc.
4 *
5 * Author:
6 * Petko Manolov <petko.manolov@konsulko.com>
7 */
8
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>
17
18
19 struct key *ima_blacklist_keyring;
20
21 /*
22 * Allocate the IMA blacklist keyring
23 */
24 static __init int ima_mok_init(void)
25 {
26 struct key_restriction *restriction;
27
28 pr_notice("Allocating IMA blacklist keyring.\n");
29
30 restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
31 if (!restriction)
32 panic("Can't allocate IMA blacklist restriction.");
33
34 restriction->check = restrict_link_by_builtin_trusted;
35
36 ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
37 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
38 (KEY_POS_ALL & ~KEY_POS_SETATTR) |
39 KEY_USR_VIEW | KEY_USR_READ |
40 KEY_USR_WRITE | KEY_USR_SEARCH,
41 KEY_ALLOC_NOT_IN_QUOTA |
42 KEY_ALLOC_SET_KEEP,
43 restriction, NULL);
44
45 if (IS_ERR(ima_blacklist_keyring))
46 panic("Can't allocate IMA blacklist keyring.");
47 return 0;
48 }
49 device_initcall(ima_mok_init);
50
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