arch/s390/crypto/sha1_s390.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * s390 implementation of the SHA1 Secure Hash Algorithm.
   5  *
   6  * Derived from cryptoapi implementation, adapted for in-place
   7  * scatterlist interface.  Originally based on the public domain
   8  * implementation written by Steve Reid.
   9  *
  10  * s390 Version:
  11  *   Copyright IBM Corp. 2003,2007
  12  *   Author(s): Thomas Spatzier
  13  *              Jan Glauber (jan.glauber@de.ibm.com)
  14  *
  15  * Derived from "crypto/sha1_generic.c"
  16  *   Copyright (c) Alan Smithee.
  17  *   Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
  18  *   Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
  19  *
  20  * This program is free software; you can redistribute it and/or modify it
  21  * under the terms of the GNU General Public License as published by the Free
  22  * Software Foundation; either version 2 of the License, or (at your option)
  23  * any later version.
  24  *
  25  */
  26 #include <crypto/internal/hash.h>
  27 #include <linux/init.h>
  28 #include <linux/module.h>
  29 #include <crypto/sha.h>
  30
  31 #include "crypt_s390.h"
  32 #include "sha.h"
  33
  34 static int sha1_init(struct shash_desc *desc)
  35 {
  36         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  37
  38         sctx->state[0] = SHA1_H0;
  39         sctx->state[1] = SHA1_H1;
  40         sctx->state[2] = SHA1_H2;
  41         sctx->state[3] = SHA1_H3;
  42         sctx->state[4] = SHA1_H4;
  43         sctx->count = 0;
  44         sctx->func = KIMD_SHA_1;
  45
  46         return 0;
  47 }
  48
  49 static struct shash_alg alg = {
  50         .digestsize     =       SHA1_DIGEST_SIZE,
  51         .init           =       sha1_init,
  52         .update         =       s390_sha_update,
  53         .final          =       s390_sha_final,
  54         .descsize       =       sizeof(struct s390_sha_ctx),
  55         .base           =       {
  56                 .cra_name       =       "sha1",
  57                 .cra_driver_name=       "sha1-s390",
  58                 .cra_priority   =       CRYPT_S390_PRIORITY,
  59                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
  60                 .cra_blocksize  =       SHA1_BLOCK_SIZE,
  61                 .cra_module     =       THIS_MODULE,
  62         }
  63 };
  64
  65 static int __init sha1_s390_init(void)
  66 {
  67         if (!crypt_s390_func_available(KIMD_SHA_1))
  68                 return -EOPNOTSUPP;
  69         return crypto_register_shash(&alg);
  70 }
  71
  72 static void __exit sha1_s390_fini(void)
  73 {
  74         crypto_unregister_shash(&alg);
  75 }
  76
  77 module_init(sha1_s390_init);
  78 module_exit(sha1_s390_fini);
  79
  80 MODULE_ALIAS("sha1");
  81 MODULE_LICENSE("GPL");
  82 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");