1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Platform keyring for firmware/platform keys
4 *
5 * Copyright IBM Corporation, 2018
6 * Author(s): Nayna Jain <nayna@linux.ibm.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/slab.h>
15 #include "../integrity.h"
16
17 /**
18 * add_to_platform_keyring - Add to platform keyring without validation.
19 * @source: Source of key
20 * @data: The blob holding the key
21 * @len: The length of the data blob
22 *
23 * Add a key to the platform keyring without checking its trust chain. This
24 * is available only during kernel initialisation.
25 */
26 void __init add_to_platform_keyring(const char *source, const void *data,
27 size_t len)
28 {
29 key_perm_t perm;
30 int rc;
31
32 perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW;
33
34 rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source, data, len,
35 perm);
36 if (rc)
37 pr_info("Error adding keys to platform keyring %s\n", source);
38 }
39
40 /*
41 * Create the trusted keyrings.
42 */
43 static __init int platform_keyring_init(void)
44 {
45 int rc;
46
47 rc = integrity_init_keyring(INTEGRITY_KEYRING_PLATFORM);
48 if (rc)
49 return rc;
50
51 pr_notice("Platform Keyring initialized\n");
52 return 0;
53 }
54
55 /*
56 * Must be initialised before we try and load the keys into the keyring.
57 */
58 device_initcall(platform_keyring_init);
59
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