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   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 <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/crypto.h>
  29 #include <crypto/sha.h>
  30
  31 #include "crypt_s390.h"
  32 #include "sha.h"
  33
  34 static void sha1_init(struct crypto_tfm *tfm)
  35 {
  36         struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);
  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
  47 static struct crypto_alg alg = {
  48         .cra_name       =       "sha1",
  49         .cra_driver_name=       "sha1-s390",
  50         .cra_priority   =       CRYPT_S390_PRIORITY,
  51         .cra_flags      =       CRYPTO_ALG_TYPE_DIGEST,
  52         .cra_blocksize  =       SHA1_BLOCK_SIZE,
  53         .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
  54         .cra_module     =       THIS_MODULE,
  55         .cra_list       =       LIST_HEAD_INIT(alg.cra_list),
  56         .cra_u          =       { .digest = {
  57         .dia_digestsize =       SHA1_DIGEST_SIZE,
  58         .dia_init       =       sha1_init,
  59         .dia_update     =       s390_sha_update,
  60         .dia_final      =       s390_sha_final } }
  61 };
  62
  63 static int __init sha1_s390_init(void)
  64 {
  65         if (!crypt_s390_func_available(KIMD_SHA_1))
  66                 return -EOPNOTSUPP;
  67         return crypto_register_alg(&alg);
  68 }
  69
  70 static void __exit sha1_s390_fini(void)
  71 {
  72         crypto_unregister_alg(&alg);
  73 }
  74
  75 module_init(sha1_s390_init);
  76 module_exit(sha1_s390_fini);
  77
  78 MODULE_ALIAS("sha1");
  79 MODULE_LICENSE("GPL");
  80 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");