linux/arch/s390/crypto/sha1_s390.c
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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
  34static 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
  47static 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
  63static 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
  70static void __exit sha1_s390_fini(void)
  71{
  72        crypto_unregister_alg(&alg);
  73}
  74
  75module_init(sha1_s390_init);
  76module_exit(sha1_s390_fini);
  77
  78MODULE_ALIAS("sha1");
  79MODULE_LICENSE("GPL");
  80MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
  81