linux-imx

/*

 * Cryptographic API.

 *

 * SHA1 Secure Hash Algorithm.

 *

 * Derived from cryptoapi implementation, adapted for in-place

 * scatterlist interface.

 *

 * Copyright (c) Alan Smithee.

 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>

 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>

 *

 * 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 <crypto/internal/hash.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/cryptohash.h>

#include <linux/types.h>

#include <crypto/sha.h>

#include <crypto/sha1_base.h>

#include <asm/byteorder.h>

​

const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {

    0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,

    0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,

    0xaf, 0xd8, 0x07, 0x09

};

EXPORT_SYMBOL_GPL(sha1_zero_message_hash);

​

static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,

                  int blocks)

{

    u32 temp[SHA_WORKSPACE_WORDS];

​

    while (blocks--) {

        sha_transform(sst->state, src, temp);

        src += SHA1_BLOCK_SIZE;

    }

    memzero_explicit(temp, sizeof(temp));

}

​

int crypto_sha1_update(struct shash_desc *desc, const u8 *data,

               unsigned int len)

{

    return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);

}

EXPORT_SYMBOL(crypto_sha1_update);

​

static int sha1_final(struct shash_desc *desc, u8 *out)

{

    sha1_base_do_finalize(desc, sha1_generic_block_fn);

    return sha1_base_finish(desc, out);

}

​

int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,

              unsigned int len, u8 *out)

{