sm3_generic.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
 4 * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
 5 *
 6 * Copyright (C) 2017 ARM Limited or its affiliates.
 7 * Written by Gilad Ben-Yossef <gilad@benyossef.com>
 8 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
 9 */
10
11#include <crypto/internal/hash.h>
12#include <crypto/sm3.h>
13#include <crypto/sm3_base.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16
17const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
18	0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
19	0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
20	0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
21	0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
22};
23EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
24
25static int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
26			  unsigned int len)
27{
28	return sm3_base_do_update_blocks(desc, data, len, sm3_block_generic);
29}
30
31static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
32			unsigned int len, u8 *hash)
33{
34	sm3_base_do_finup(desc, data, len, sm3_block_generic);
35	return sm3_base_finish(desc, hash);
36}
37
38static struct shash_alg sm3_alg = {
39	.digestsize	=	SM3_DIGEST_SIZE,
40	.init		=	sm3_base_init,
41	.update		=	crypto_sm3_update,
42	.finup		=	crypto_sm3_finup,
43	.descsize	=	SM3_STATE_SIZE,
44	.base		=	{
45		.cra_name	 =	"sm3",
46		.cra_driver_name =	"sm3-generic",
47		.cra_priority	=	100,
48		.cra_flags	 =	CRYPTO_AHASH_ALG_BLOCK_ONLY |
49					CRYPTO_AHASH_ALG_FINUP_MAX,
50		.cra_blocksize	 =	SM3_BLOCK_SIZE,
51		.cra_module	 =	THIS_MODULE,
52	}
53};
54
55static int __init sm3_generic_mod_init(void)
56{
57	return crypto_register_shash(&sm3_alg);
58}
59
60static void __exit sm3_generic_mod_fini(void)
61{
62	crypto_unregister_shash(&sm3_alg);
63}
64
65module_init(sm3_generic_mod_init);
66module_exit(sm3_generic_mod_fini);
67
68MODULE_LICENSE("GPL v2");
69MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
70
71MODULE_ALIAS_CRYPTO("sm3");
72MODULE_ALIAS_CRYPTO("sm3-generic");