1 /* 2 * FIPS 200 support. 3 * 4 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the Free 8 * Software Foundation; either version 2 of the License, or (at your option) 9 * any later version. 10 * 11 */ 12 13 #include <linux/export.h> 14 #include <linux/fips.h> 15 #include <linux/init.h> 16 #include <linux/module.h> 17 #include <linux/kernel.h> 18 #include <linux/sysctl.h> 19 20 int fips_enabled; 21 EXPORT_SYMBOL_GPL(fips_enabled); 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 static struct ctl_table crypto_sysctl_table[] = { 35 { 36 .procname = "fips_enabled", 37 .data = &fips_enabled, 38 .maxlen = sizeof(int), 39 .mode = 0444, 40 .proc_handler = proc_dointvec 41 }, 42 {} 43 }; 44 45 static struct ctl_table crypto_dir_table[] = { 46 { 47 .procname = "crypto", 48 .mode = 0555, 49 .child = crypto_sysctl_table 50 }, 51 {} 52 }; 53 54 static struct ctl_table_header *crypto_sysctls; 55 56 static void crypto_proc_fips_init(void) 57 { 58 crypto_sysctls = register_sysctl_table(crypto_dir_table); 59 } 60 61 static void crypto_proc_fips_exit(void) 62 { 63 unregister_sysctl_table(crypto_sysctls); 64 } 65 66 static int __init fips_init(void) 67 { 68 crypto_proc_fips_init(); 69 return 0; 70 } 71 72 static void __exit fips_exit(void) 73 { 74 crypto_proc_fips_exit(); 75 } 76 77 module_init(fips_init); 78 module_exit(fips_exit); 79