106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
|
|
* ARM NEON instructions.
|
|
*
|
|
* Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
|
|
*
|
|
* This file is based on sha1_generic.c and sha1_ssse3_glue.c:
|
|
* Copyright (c) Alan Smithee.
|
|
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
|
|
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
|
|
* Copyright (c) Mathias Krause <minipli@googlemail.com>
|
|
* Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
|
|
*/
|
|
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/internal/simd.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/neon.h>
|
|
#include <asm/simd.h>
|
|
|
|
#include "sha1.h"
|
|
|
|
asmlinkage void sha1_transform_neon(void *state_h, const char *data,
|
|
unsigned int rounds);
|
|
|
|
static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
|
|
|
if (!crypto_simd_usable() ||
|
|
(sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
|
|
return sha1_update_arm(desc, data, len);
|
|
|
|
kernel_neon_begin();
|
|
sha1_base_do_update(desc, data, len,
|
|
(sha1_block_fn *)sha1_transform_neon);
|
|
kernel_neon_end();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len, u8 *out)
|
|
{
|
|
if (!crypto_simd_usable())
|
|
return sha1_finup_arm(desc, data, len, out);
|
|
|
|
kernel_neon_begin();
|
|
if (len)
|
|
sha1_base_do_update(desc, data, len,
|
|
(sha1_block_fn *)sha1_transform_neon);
|
|
sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
|
|
kernel_neon_end();
|
|
|
|
return sha1_base_finish(desc, out);
|
|
}
|
|
|
|
static int sha1_neon_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
return sha1_neon_finup(desc, NULL, 0, out);
|
|
}
|
|
|
|
static struct shash_alg alg = {
|
|
.digestsize = SHA1_DIGEST_SIZE,
|
|
.init = sha1_base_init,
|
|
.update = sha1_neon_update,
|
|
.final = sha1_neon_final,
|
|
.finup = sha1_neon_finup,
|
|
.descsize = sizeof(struct sha1_state),
|
|
.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name = "sha1-neon",
|
|
.cra_priority = 250,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init sha1_neon_mod_init(void)
|
|
{
|
|
if (!cpu_has_neon())
|
|
return -ENODEV;
|
|
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit sha1_neon_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_init(sha1_neon_mod_init);
|
|
module_exit(sha1_neon_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
|
|
MODULE_ALIAS_CRYPTO("sha1");
|