// 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);