// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* Glue code for the SHA256 Secure Hash Algorithm assembly implementation
|
* using optimized ARM assembler and NEON instructions.
|
*
|
* Copyright © 2015 Google Inc.
|
*
|
* This file is based on sha256_ssse3_glue.c:
|
* Copyright (C) 2013 Intel Corporation
|
* Author: Tim Chen <tim.c.chen@linux.intel.com>
|
*/
|
|
#include <crypto/internal/hash.h>
|
#include <linux/crypto.h>
|
#include <linux/init.h>
|
#include <linux/module.h>
|
#include <linux/mm.h>
|
#include <linux/types.h>
|
#include <linux/string.h>
|
#include <crypto/sha.h>
|
#include <crypto/sha256_base.h>
|
#include <asm/simd.h>
|
#include <asm/neon.h>
|
|
#include "sha256_glue.h"
|
|
asmlinkage void sha256_block_data_order(u32 *digest, const void *data,
|
unsigned int num_blks);
|
|
int crypto_sha256_arm_update(struct shash_desc *desc, const u8 *data,
|
unsigned int len)
|
{
|
/* make sure casting to sha256_block_fn() is safe */
|
BUILD_BUG_ON(offsetof(struct sha256_state, state) != 0);
|
|
return sha256_base_do_update(desc, data, len,
|
(sha256_block_fn *)sha256_block_data_order);
|
}
|
EXPORT_SYMBOL(crypto_sha256_arm_update);
|
|
static int crypto_sha256_arm_final(struct shash_desc *desc, u8 *out)
|
{
|
sha256_base_do_finalize(desc,
|
(sha256_block_fn *)sha256_block_data_order);
|
return sha256_base_finish(desc, out);
|
}
|
|
int crypto_sha256_arm_finup(struct shash_desc *desc, const u8 *data,
|
unsigned int len, u8 *out)
|
{
|
sha256_base_do_update(desc, data, len,
|
(sha256_block_fn *)sha256_block_data_order);
|
return crypto_sha256_arm_final(desc, out);
|
}
|
EXPORT_SYMBOL(crypto_sha256_arm_finup);
|
|
static struct shash_alg algs[] = { {
|
.digestsize = SHA256_DIGEST_SIZE,
|
.init = sha256_base_init,
|
.update = crypto_sha256_arm_update,
|
.final = crypto_sha256_arm_final,
|
.finup = crypto_sha256_arm_finup,
|
.descsize = sizeof(struct sha256_state),
|
.base = {
|
.cra_name = "sha256",
|
.cra_driver_name = "sha256-asm",
|
.cra_priority = 150,
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
.cra_module = THIS_MODULE,
|
}
|
}, {
|
.digestsize = SHA224_DIGEST_SIZE,
|
.init = sha224_base_init,
|
.update = crypto_sha256_arm_update,
|
.final = crypto_sha256_arm_final,
|
.finup = crypto_sha256_arm_finup,
|
.descsize = sizeof(struct sha256_state),
|
.base = {
|
.cra_name = "sha224",
|
.cra_driver_name = "sha224-asm",
|
.cra_priority = 150,
|
.cra_blocksize = SHA224_BLOCK_SIZE,
|
.cra_module = THIS_MODULE,
|
}
|
} };
|
|
static int __init sha256_mod_init(void)
|
{
|
int res = crypto_register_shashes(algs, ARRAY_SIZE(algs));
|
|
if (res < 0)
|
return res;
|
|
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
|
res = crypto_register_shashes(sha256_neon_algs,
|
ARRAY_SIZE(sha256_neon_algs));
|
|
if (res < 0)
|
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
|
}
|
|
return res;
|
}
|
|
static void __exit sha256_mod_fini(void)
|
{
|
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
|
|
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
|
crypto_unregister_shashes(sha256_neon_algs,
|
ARRAY_SIZE(sha256_neon_algs));
|
}
|
|
module_init(sha256_mod_init);
|
module_exit(sha256_mod_fini);
|
|
MODULE_LICENSE("GPL");
|
MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm (ARM), including NEON");
|
|
MODULE_ALIAS_CRYPTO("sha256");
|
