Logo Search packages:      
Sourcecode: linux version File versions  Download package

sha256_s390.c

/*
 * Cryptographic API.
 *
 * s390 implementation of the SHA256 Secure Hash Algorithm.
 *
 * s390 Version:
 *   Copyright IBM Corp. 2005,2007
 *   Author(s): Jan Glauber (jang@de.ibm.com)
 *
 * Derived from "crypto/sha256_generic.c"
 * and "arch/s390/crypto/sha1_s390.c"
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/crypto.h>
#include <crypto/sha.h>

#include "crypt_s390.h"
#include "sha.h"

static void sha256_init(struct crypto_tfm *tfm)
{
      struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);

      sctx->state[0] = SHA256_H0;
      sctx->state[1] = SHA256_H1;
      sctx->state[2] = SHA256_H2;
      sctx->state[3] = SHA256_H3;
      sctx->state[4] = SHA256_H4;
      sctx->state[5] = SHA256_H5;
      sctx->state[6] = SHA256_H6;
      sctx->state[7] = SHA256_H7;
      sctx->count = 0;
      sctx->func = KIMD_SHA_256;
}

static struct crypto_alg alg = {
      .cra_name   =     "sha256",
      .cra_driver_name =      "sha256-s390",
      .cra_priority     =     CRYPT_S390_PRIORITY,
      .cra_flags  =     CRYPTO_ALG_TYPE_DIGEST,
      .cra_blocksize    =     SHA256_BLOCK_SIZE,
      .cra_ctxsize      =     sizeof(struct s390_sha_ctx),
      .cra_module =     THIS_MODULE,
      .cra_list   =     LIST_HEAD_INIT(alg.cra_list),
      .cra_u            =     { .digest = {
      .dia_digestsize   =     SHA256_DIGEST_SIZE,
      .dia_init   =     sha256_init,
      .dia_update =     s390_sha_update,
      .dia_final  =     s390_sha_final } }
};

static int sha256_s390_init(void)
{
      if (!crypt_s390_func_available(KIMD_SHA_256))
            return -EOPNOTSUPP;

      return crypto_register_alg(&alg);
}

static void __exit sha256_s390_fini(void)
{
      crypto_unregister_alg(&alg);
}

module_init(sha256_s390_init);
module_exit(sha256_s390_fini);

MODULE_ALIAS("sha256");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");

Generated by  Doxygen 1.6.0   Back to index