120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions
|
|
*
|
|
* Copyright (C) 2018 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 <asm/neon.h>
|
|
#include <asm/simd.h>
|
|
#include <asm/unaligned.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/sha.h>
|
|
#include <crypto/sha512_base.h>
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/module.h>
|
|
|
|
MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions");
|
|
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src,
|
|
int blocks);
|
|
|
|
asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks);
|
|
|
|
static int sha512_ce_update(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
if (!may_use_simd())
|
|
return sha512_base_do_update(desc, data, len,
|
|
(sha512_block_fn *)sha512_block_data_order);
|
|
|
|
kernel_neon_begin();
|
|
sha512_base_do_update(desc, data, len,
|
|
(sha512_block_fn *)sha512_ce_transform);
|
|
kernel_neon_end();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sha512_ce_finup(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len, u8 *out)
|
|
{
|
|
if (!may_use_simd()) {
|
|
if (len)
|
|
sha512_base_do_update(desc, data, len,
|
|
(sha512_block_fn *)sha512_block_data_order);
|
|
sha512_base_do_finalize(desc,
|
|
(sha512_block_fn *)sha512_block_data_order);
|
|
return sha512_base_finish(desc, out);
|
|
}
|
|
|
|
kernel_neon_begin();
|
|
sha512_base_do_update(desc, data, len,
|
|
(sha512_block_fn *)sha512_ce_transform);
|
|
sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
|
|
kernel_neon_end();
|
|
return sha512_base_finish(desc, out);
|
|
}
|
|
|
|
static int sha512_ce_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
if (!may_use_simd()) {
|
|
sha512_base_do_finalize(desc,
|
|
(sha512_block_fn *)sha512_block_data_order);
|
|
return sha512_base_finish(desc, out);
|
|
}
|
|
|
|
kernel_neon_begin();
|
|
sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
|
|
kernel_neon_end();
|
|
return sha512_base_finish(desc, out);
|
|
}
|
|
|
|
static struct shash_alg algs[] = { {
|
|
.init = sha384_base_init,
|
|
.update = sha512_ce_update,
|
|
.final = sha512_ce_final,
|
|
.finup = sha512_ce_finup,
|
|
.descsize = sizeof(struct sha512_state),
|
|
.digestsize = SHA384_DIGEST_SIZE,
|
|
.base.cra_name = "sha384",
|
|
.base.cra_driver_name = "sha384-ce",
|
|
.base.cra_priority = 200,
|
|
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.base.cra_blocksize = SHA512_BLOCK_SIZE,
|
|
.base.cra_module = THIS_MODULE,
|
|
}, {
|
|
.init = sha512_base_init,
|
|
.update = sha512_ce_update,
|
|
.final = sha512_ce_final,
|
|
.finup = sha512_ce_finup,
|
|
.descsize = sizeof(struct sha512_state),
|
|
.digestsize = SHA512_DIGEST_SIZE,
|
|
.base.cra_name = "sha512",
|
|
.base.cra_driver_name = "sha512-ce",
|
|
.base.cra_priority = 200,
|
|
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.base.cra_blocksize = SHA512_BLOCK_SIZE,
|
|
.base.cra_module = THIS_MODULE,
|
|
} };
|
|
|
|
static int __init sha512_ce_mod_init(void)
|
|
{
|
|
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
|
|
}
|
|
|
|
static void __exit sha512_ce_mod_fini(void)
|
|
{
|
|
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
|
|
}
|
|
|
|
module_cpu_feature_match(SHA512, sha512_ce_mod_init);
|
|
module_exit(sha512_ce_mod_fini);
|