103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
|
|
* 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)
|
|
{
|
|
sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
|
|
return sha1_final(desc, out);
|
|
}
|
|
EXPORT_SYMBOL(crypto_sha1_finup);
|
|
|
|
static struct shash_alg alg = {
|
|
.digestsize = SHA1_DIGEST_SIZE,
|
|
.init = sha1_base_init,
|
|
.update = crypto_sha1_update,
|
|
.final = sha1_final,
|
|
.finup = crypto_sha1_finup,
|
|
.descsize = sizeof(struct sha1_state),
|
|
.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name= "sha1-generic",
|
|
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init sha1_generic_mod_init(void)
|
|
{
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit sha1_generic_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_init(sha1_generic_mod_init);
|
|
module_exit(sha1_generic_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
|
|
|
|
MODULE_ALIAS_CRYPTO("sha1");
|
|
MODULE_ALIAS_CRYPTO("sha1-generic");
|