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Linux/crypto/fips.c

  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 

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