// SPDX-License-Identifier: GPL-2.0-or-later /* * FIPS 200 support. * * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com> */ #include <linux/export.h> #include <linux/fips.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/sysctl.h> #include <linux/notifier.h> int fips_enabled; EXPORT_SYMBOL_GPL(fips_enabled); ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain); EXPORT_SYMBOL_GPL(fips_fail_notif_chain); /* Process kernel command-line parameter at boot time. fips=0 or fips=1 */ static int fips_enable(char *str) { fips_enabled = !!simple_strtol(str, NULL, 0); printk(KERN_INFO "fips mode: %s\n", fips_enabled ? "enabled" : "disabled"); return 1; } __setup("fips=", fips_enable); static struct ctl_table crypto_sysctl_table[] = { { .procname = "fips_enabled", .data = &fips_enabled, .maxlen = sizeof(int), .mode = 0444, .proc_handler = proc_dointvec }, {} }; static struct ctl_table crypto_dir_table[] = { { .procname = "crypto", .mode = 0555, .child = crypto_sysctl_table }, {} }; static struct ctl_table_header *crypto_sysctls; static void crypto_proc_fips_init(void) { crypto_sysctls = register_sysctl_table(crypto_dir_table); } static void crypto_proc_fips_exit(void) { unregister_sysctl_table(crypto_sysctls); } void fips_fail_notify(void) { if (fips_enabled) atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL); } EXPORT_SYMBOL_GPL(fips_fail_notify); static int __init fips_init(void) { crypto_proc_fips_init(); return 0; } static void __exit fips_exit(void) { crypto_proc_fips_exit(); } subsys_initcall(fips_init); module_exit(fips_exit);