100 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*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_NAME35#ifdef CONFIG_CRYPTO_FIPS_CUSTOM_VERSION36#define FIPS_MODULE_VERSION CONFIG_CRYPTO_FIPS_VERSION37#else38#define FIPS_MODULE_VERSION UTS_RELEASE39#endif40 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_dointvec51 },52 {53 .procname = "fips_name",54 .data = &fips_name,55 .maxlen = 64,56 .mode = 0444,57 .proc_handler = proc_dostring58 },59 {60 .procname = "fips_version",61 .data = &fips_version,62 .maxlen = 64,63 .mode = 0444,64 .proc_handler = proc_dostring65 },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