LXR linux/arch/s390/crypto/sha1

   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
  34static 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
  49static int sha1_export(struct shash_desc *desc, void *out)
  50{
  51        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  52        struct sha1_state *octx = out;
  53
  54        octx->count = sctx->count;
  55        memcpy(octx->state, sctx->state, sizeof(octx->state));
  56        memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
  57        return 0;
  58}
  59
  60static int sha1_import(struct shash_desc *desc, const void *in)
  61{
  62        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  63        const struct sha1_state *ictx = in;
  64
  65        sctx->count = ictx->count;
  66        memcpy(sctx->state, ictx->state, sizeof(ictx->state));
  67        memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
  68        sctx->func = KIMD_SHA_1;
  69        return 0;
  70}
  71
  72static struct shash_alg alg = {
  73        .digestsize     =       SHA1_DIGEST_SIZE,
  74        .init           =       sha1_init,
  75        .update         =       s390_sha_update,
  76        .final          =       s390_sha_final,
  77        .export         =       sha1_export,
  78        .import         =       sha1_import,
  79        .descsize       =       sizeof(struct s390_sha_ctx),
  80        .statesize      =       sizeof(struct sha1_state),
  81        .base           =       {
  82                .cra_name       =       "sha1",
  83                .cra_driver_name=       "sha1-s390",
  84                .cra_priority   =       CRYPT_S390_PRIORITY,
  85                .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
  86                .cra_blocksize  =       SHA1_BLOCK_SIZE,
  87                .cra_module     =       THIS_MODULE,
  88        }
  89};
  90
  91static int __init sha1_s390_init(void)
  92{
  93        if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
  94                return -EOPNOTSUPP;
  95        return crypto_register_shash(&alg);
  96}
  97
  98static void __exit sha1_s390_fini(void)
  99{
 100        crypto_unregister_shash(&alg);
 101}
 102
 103module_init(sha1_s390_init);
 104module_exit(sha1_s390_fini);
 105
 106MODULE_ALIAS("sha1");
 107MODULE_LICENSE("GPL");
 108MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
 109