LXR linux/security/integrity/platform_certs/platform

   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 */
  26void __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 */
  43static __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 */
  58device_initcall(platform_keyring_init);
  59