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Viewing changes to arch/s390/crypto/sha1_s390.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/s390/crypto/sha1_s390.c
 
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/*
 
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 * Cryptographic API.
 
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 *
 
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 * s390 implementation of the SHA1 Secure Hash Algorithm.
 
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 *
 
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 * Derived from cryptoapi implementation, adapted for in-place
 
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 * scatterlist interface.  Originally based on the public domain
 
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 * implementation written by Steve Reid.
 
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 *
 
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 * s390 Version:
 
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 *   Copyright IBM Corp. 2003,2007
 
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 *   Author(s): Thomas Spatzier
 
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 *              Jan Glauber (jan.glauber@de.ibm.com)
 
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 *
 
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 * Derived from "crypto/sha1_generic.c"
 
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 *   Copyright (c) Alan Smithee.
 
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 *   Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
 
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 *   Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify it
 
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 * under the terms of the GNU General Public License as published by the Free
 
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 * Software Foundation; either version 2 of the License, or (at your option)
 
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 * any later version.
 
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 *
 
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 */
 
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#include <crypto/internal/hash.h>
 
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#include <linux/init.h>
 
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#include <linux/module.h>
 
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#include <crypto/sha.h>
 
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#include "crypt_s390.h"
 
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#include "sha.h"
 
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static int sha1_init(struct shash_desc *desc)
 
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{
 
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        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 
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        sctx->state[0] = SHA1_H0;
 
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        sctx->state[1] = SHA1_H1;
 
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        sctx->state[2] = SHA1_H2;
 
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        sctx->state[3] = SHA1_H3;
 
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        sctx->state[4] = SHA1_H4;
 
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        sctx->count = 0;
 
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        sctx->func = KIMD_SHA_1;
 
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        return 0;
 
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}
 
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static int sha1_export(struct shash_desc *desc, void *out)
 
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{
 
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        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 
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        struct sha1_state *octx = out;
 
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        octx->count = sctx->count;
 
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        memcpy(octx->state, sctx->state, sizeof(octx->state));
 
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        memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
 
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        return 0;
 
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}
 
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static int sha1_import(struct shash_desc *desc, const void *in)
 
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{
 
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        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 
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        const struct sha1_state *ictx = in;
 
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        sctx->count = ictx->count;
 
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        memcpy(sctx->state, ictx->state, sizeof(ictx->state));
 
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        memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
 
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        sctx->func = KIMD_SHA_1;
 
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        return 0;
 
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}
 
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static struct shash_alg alg = {
 
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        .digestsize     =       SHA1_DIGEST_SIZE,
 
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        .init           =       sha1_init,
 
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        .update         =       s390_sha_update,
 
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        .final          =       s390_sha_final,
 
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        .export         =       sha1_export,
 
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        .import         =       sha1_import,
 
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        .descsize       =       sizeof(struct s390_sha_ctx),
 
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        .statesize      =       sizeof(struct sha1_state),
 
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        .base           =       {
 
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                .cra_name       =       "sha1",
 
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                .cra_driver_name=       "sha1-s390",
 
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                .cra_priority   =       CRYPT_S390_PRIORITY,
 
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                .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
 
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                .cra_blocksize  =       SHA1_BLOCK_SIZE,
 
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                .cra_module     =       THIS_MODULE,
 
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        }
 
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};
 
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static int __init sha1_s390_init(void)
 
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{
 
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        if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
 
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                return -EOPNOTSUPP;
 
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        return crypto_register_shash(&alg);
 
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}
 
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static void __exit sha1_s390_fini(void)
 
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{
 
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        crypto_unregister_shash(&alg);
 
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}
 
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module_init(sha1_s390_init);
 
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module_exit(sha1_s390_fini);
 
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MODULE_ALIAS("sha1");
 
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MODULE_LICENSE("GPL");
 
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");