95 строки
2.3 KiB
C
95 строки
2.3 KiB
C
/*
|
|
* sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
|
|
*
|
|
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/sha.h>
|
|
#include <crypto/sha1_base.h>
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/hwcap.h>
|
|
#include <asm/neon.h>
|
|
#include <asm/simd.h>
|
|
|
|
#include "sha1.h"
|
|
|
|
MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
|
|
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
|
|
int blocks);
|
|
|
|
static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
|
|
|
if (!may_use_simd() ||
|
|
(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_ce_transform);
|
|
kernel_neon_end();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len, u8 *out)
|
|
{
|
|
if (!may_use_simd())
|
|
return sha1_finup_arm(desc, data, len, out);
|
|
|
|
kernel_neon_begin();
|
|
if (len)
|
|
sha1_base_do_update(desc, data, len, sha1_ce_transform);
|
|
sha1_base_do_finalize(desc, sha1_ce_transform);
|
|
kernel_neon_end();
|
|
|
|
return sha1_base_finish(desc, out);
|
|
}
|
|
|
|
static int sha1_ce_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
return sha1_ce_finup(desc, NULL, 0, out);
|
|
}
|
|
|
|
static struct shash_alg alg = {
|
|
.init = sha1_base_init,
|
|
.update = sha1_ce_update,
|
|
.final = sha1_ce_final,
|
|
.finup = sha1_ce_finup,
|
|
.descsize = sizeof(struct sha1_state),
|
|
.digestsize = SHA1_DIGEST_SIZE,
|
|
.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name = "sha1-ce",
|
|
.cra_priority = 200,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init sha1_ce_mod_init(void)
|
|
{
|
|
return crypto_register_shash(&alg);
|
|
}
|
|
|
|
static void __exit sha1_ce_mod_fini(void)
|
|
{
|
|
crypto_unregister_shash(&alg);
|
|
}
|
|
|
|
module_cpu_feature_match(SHA1, sha1_ce_mod_init);
|
|
module_exit(sha1_ce_mod_fini);
|