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

fips.c (1712B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * FIPS 200 support.
      4 *
      5 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
      6 */
      7
      8#include <linux/export.h>
      9#include <linux/fips.h>
     10#include <linux/init.h>
     11#include <linux/module.h>
     12#include <linux/kernel.h>
     13#include <linux/sysctl.h>
     14#include <linux/notifier.h>
     15
     16int fips_enabled;
     17EXPORT_SYMBOL_GPL(fips_enabled);
     18
     19ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
     20EXPORT_SYMBOL_GPL(fips_fail_notif_chain);
     21
     22/* Process kernel command-line parameter at boot time. fips=0 or fips=1 */
     23static int fips_enable(char *str)
     24{
     25	fips_enabled = !!simple_strtol(str, NULL, 0);
     26	printk(KERN_INFO "fips mode: %s\n",
     27		fips_enabled ? "enabled" : "disabled");
     28	return 1;
     29}
     30
     31__setup("fips=", fips_enable);
     32
     33static struct ctl_table crypto_sysctl_table[] = {
     34	{
     35		.procname       = "fips_enabled",
     36		.data           = &fips_enabled,
     37		.maxlen         = sizeof(int),
     38		.mode           = 0444,
     39		.proc_handler   = proc_dointvec
     40	},
     41	{}
     42};
     43
     44static struct ctl_table crypto_dir_table[] = {
     45	{
     46		.procname       = "crypto",
     47		.mode           = 0555,
     48		.child          = crypto_sysctl_table
     49	},
     50	{}
     51};
     52
     53static struct ctl_table_header *crypto_sysctls;
     54
     55static void crypto_proc_fips_init(void)
     56{
     57	crypto_sysctls = register_sysctl_table(crypto_dir_table);
     58}
     59
     60static void crypto_proc_fips_exit(void)
     61{
     62	unregister_sysctl_table(crypto_sysctls);
     63}
     64
     65void fips_fail_notify(void)
     66{
     67	if (fips_enabled)
     68		atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);
     69}
     70EXPORT_SYMBOL_GPL(fips_fail_notify);
     71
     72static int __init fips_init(void)
     73{
     74	crypto_proc_fips_init();
     75	return 0;
     76}
     77
     78static void __exit fips_exit(void)
     79{
     80	crypto_proc_fips_exit();
     81}
     82
     83subsys_initcall(fips_init);
     84module_exit(fips_exit);