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// SPDX-License-Identifier: GPL-2.0+
/*
* Platform keyring for firmware/platform keys
*
* Copyright IBM Corporation, 2018
* Author(s): Nayna Jain <nayna@linux.ibm.com>
*/
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/err.h>
#include <linux/slab.h>
#include "../integrity.h"
/**
* add_to_platform_keyring - Add to platform keyring without validation.
* @source: Source of key
* @data: The blob holding the key
* @len: The length of the data blob
*
* Add a key to the platform keyring without checking its trust chain. This
* is available only during kernel initialisation.
*/
void __init add_to_platform_keyring(const char *source, const void *data,
size_t len)
{
key_perm_t perm;
int rc;
perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW;
rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source, data, len,
perm);
if (rc)
pr_info("Error adding keys to platform keyring %s\n", source);
}
/*
* Create the trusted keyrings.
*/
static __init int platform_keyring_init(void)
{
int rc;
rc = integrity_init_keyring(INTEGRITY_KEYRING_PLATFORM);
if (rc)
return rc;
pr_notice("Platform Keyring initialized\n");
return 0;
}
/*
* Must be initialised before we try and load the keys into the keyring.
*/
device_initcall(platform_keyring_init);
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