| 1 | |
| 2 | |
| 3 | * Platform keyring for firmware/platform keys
|
| 4 | *
|
| 5 | * Copyright IBM Corporation, 2018
|
| 6 | * Author(s): Nayna Jain <[email protected]>
|
| 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);
|