cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

platform_keyring.c (1364B)

      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);