sm3-neon-glue.c

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * sm3-neon-glue.c - SM3 secure hash using NEON instructions
 4 *
 5 * Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
 6 */
 7
 8#include <asm/simd.h>
 9#include <crypto/internal/hash.h>
10#include <crypto/sm3.h>
11#include <crypto/sm3_base.h>
12#include <linux/cpufeature.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15
16
17asmlinkage void sm3_neon_transform(struct sm3_state *sst, u8 const *src,
18				   int blocks);
19
20static int sm3_neon_update(struct shash_desc *desc, const u8 *data,
21			   unsigned int len)
22{
23	scoped_ksimd()
24		return sm3_base_do_update_blocks(desc, data, len,
25						 sm3_neon_transform);
26}
27
28static int sm3_neon_finup(struct shash_desc *desc, const u8 *data,
29			  unsigned int len, u8 *out)
30{
31	scoped_ksimd()
32		sm3_base_do_finup(desc, data, len, sm3_neon_transform);
33	return sm3_base_finish(desc, out);
34}
35
36static struct shash_alg sm3_alg = {
37	.digestsize		= SM3_DIGEST_SIZE,
38	.init			= sm3_base_init,
39	.update			= sm3_neon_update,
40	.finup			= sm3_neon_finup,
41	.descsize		= SM3_STATE_SIZE,
42	.base.cra_name		= "sm3",
43	.base.cra_driver_name	= "sm3-neon",
44	.base.cra_flags		= CRYPTO_AHASH_ALG_BLOCK_ONLY |
45				  CRYPTO_AHASH_ALG_FINUP_MAX,
46	.base.cra_blocksize	= SM3_BLOCK_SIZE,
47	.base.cra_module	= THIS_MODULE,
48	.base.cra_priority	= 200,
49};
50
51static int __init sm3_neon_init(void)
52{
53	return crypto_register_shash(&sm3_alg);
54}
55
56static void __exit sm3_neon_fini(void)
57{
58	crypto_unregister_shash(&sm3_alg);
59}
60
61module_init(sm3_neon_init);
62module_exit(sm3_neon_fini);
63
64MODULE_DESCRIPTION("SM3 secure hash using NEON instructions");
65MODULE_AUTHOR("Jussi Kivilinna <jussi.kivilinna@iki.fi>");
66MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>");
67MODULE_LICENSE("GPL v2");