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 17 int fips_enabled; 18 EXPORT_SYMBOL_GPL(fips_enabled); 19 20 ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain); 21 EXPORT_SYMBOL_GPL(fips_fail_notif_chain); 22 23 /* Process kernel command-line parameter at boot time. fips=0 or fips=1 */ 24 static 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 41 static char fips_name[] = FIPS_MODULE_NAME; 42 static char fips_version[] = FIPS_MODULE_VERSION; 43 44 static 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 68 static struct ctl_table_header *crypto_sysctls; 69 70 static void crypto_proc_fips_init(void) 71 { 72 crypto_sysctls = register_sysctl("crypto", crypto_sysctl_table); 73 } 74 75 static void crypto_proc_fips_exit(void) 76 { 77 unregister_sysctl_table(crypto_sysctls); 78 } 79 80 void fips_fail_notify(void) 81 { 82 if (fips_enabled) 83 atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL); 84 } 85 EXPORT_SYMBOL_GPL(fips_fail_notify); 86 87 static int __init fips_init(void) 88 { 89 crypto_proc_fips_init(); 90 return 0; 91 } 92 93 static void __exit fips_exit(void) 94 { 95 crypto_proc_fips_exit(); 96 } 97 98 subsys_initcall(fips_init); 99 module_exit(fips_exit); 100