drivers/crypto/padlock.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Support for VIA PadLock hardware crypto engine.
   5  *
   6  * Copyright (c) 2006  Michal Ludvig <michal@logix.cz>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/crypto.h>
  19 #include <linux/cryptohash.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/kernel.h>
  22 #include <linux/scatterlist.h>
  23 #include "padlock.h"
  24
  25 static int __init padlock_init(void)
  26 {
  27         int success = 0;
  28
  29         if (crypto_has_cipher("aes-padlock", 0, 0))
  30                 success++;
  31
  32         if (crypto_has_hash("sha1-padlock", 0, 0))
  33                 success++;
  34
  35         if (crypto_has_hash("sha256-padlock", 0, 0))
  36                 success++;
  37
  38         if (!success) {
  39                 printk(KERN_WARNING PFX "No VIA PadLock drivers have been loaded.\n");
  40                 return -ENODEV;
  41         }
  42
  43         printk(KERN_NOTICE PFX "%d drivers are available.\n", success);
  44
  45         return 0;
  46 }
  47
  48 static void __exit padlock_fini(void)
  49 {
  50 }
  51
  52 module_init(padlock_init);
  53 module_exit(padlock_fini);
  54
  55 MODULE_DESCRIPTION("Load all configured PadLock algorithms.");
  56 MODULE_LICENSE("GPL");
  57 MODULE_AUTHOR("Michal Ludvig");
  58