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#include <generated/utsrelease.h> 16 17int fips_enabled; 18EXPORT_SYMBOL_GPL(fips_enabled); 19 20ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain); 21EXPORT_SYMBOL_GPL(fips_fail_notif_chain); 22 23/* Process kernel command-line parameter at boot time. fips=0 or fips=1 */ 24static int fips_enable(char *str) 25{ 26 fips_enabled = !!simple_strtol(str, NULL, 0); 27 printk(KERN_INFO "fips mode: %s\n", 28 fips_enabled ? "enabled" : "disabled"); 29 return 1; 30} 31 32__setup("fips=", fips_enable); 33 34#define FIPS_MODULE_NAME CONFIG_CRYPTO_FIPS_NAME 35#ifdef CONFIG_CRYPTO_FIPS_CUSTOM_VERSION 36#define FIPS_MODULE_VERSION CONFIG_CRYPTO_FIPS_VERSION 37#else 38#define FIPS_MODULE_VERSION UTS_RELEASE 39#endif 40 41static char fips_name[] = FIPS_MODULE_NAME; 42static char fips_version[] = FIPS_MODULE_VERSION; 43 44static struct ctl_table crypto_sysctl_table[] = { 45 { 46 .procname = "fips_enabled", 47 .data = &fips_enabled, 48 .maxlen = sizeof(int), 49 .mode = 0444, 50 .proc_handler = proc_dointvec 51 }, 52 { 53 .procname = "fips_name", 54 .data = &fips_name, 55 .maxlen = 64, 56 .mode = 0444, 57 .proc_handler = proc_dostring 58 }, 59 { 60 .procname = "fips_version", 61 .data = &fips_version, 62 .maxlen = 64, 63 .mode = 0444, 64 .proc_handler = proc_dostring 65 }, 66}; 67 68static struct ctl_table_header *crypto_sysctls; 69 70static void crypto_proc_fips_init(void) 71{ 72 crypto_sysctls = register_sysctl("crypto", crypto_sysctl_table); 73} 74 75static void crypto_proc_fips_exit(void) 76{ 77 unregister_sysctl_table(crypto_sysctls); 78} 79 80void fips_fail_notify(void) 81{ 82 if (fips_enabled) 83 atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL); 84} 85EXPORT_SYMBOL_GPL(fips_fail_notify); 86 87static int __init fips_init(void) 88{ 89 crypto_proc_fips_init(); 90 return 0; 91} 92 93static void __exit fips_exit(void) 94{ 95 crypto_proc_fips_exit(); 96} 97 98subsys_initcall(fips_init); 99module_exit(fips_exit); 100