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 <linux/init.h>
13#include <linux/module.h>
14#include <linux/mm.h>
15#include <linux/types.h>
16#include <crypto/sm3.h>
17#include <crypto/sm3_base.h>
18#include <linux/bitops.h>
19#include <asm/byteorder.h>
20#include <asm/unaligned.h>
21
22const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
23	0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
24	0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
25	0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
26	0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
27};
28EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
29
30static int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
31			  unsigned int len)
32{
33	sm3_update(shash_desc_ctx(desc), data, len);
34	return 0;
35}
36
37static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
38{
39	sm3_final(shash_desc_ctx(desc), out);
40	return 0;
41}
42
43static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
44			unsigned int len, u8 *hash)
45{
46	struct sm3_state *sctx = shash_desc_ctx(desc);
47
48	if (len)
49		sm3_update(sctx, data, len);
50	sm3_final(sctx, hash);
51	return 0;
52}
53
54static struct shash_alg sm3_alg = {
55	.digestsize	=	SM3_DIGEST_SIZE,
56	.init		=	sm3_base_init,
57	.update		=	crypto_sm3_update,
58	.final		=	crypto_sm3_final,
59	.finup		=	crypto_sm3_finup,
60	.descsize	=	sizeof(struct sm3_state),
61	.base		=	{
62		.cra_name	 =	"sm3",
63		.cra_driver_name =	"sm3-generic",
64		.cra_priority	=	100,
65		.cra_blocksize	 =	SM3_BLOCK_SIZE,
66		.cra_module	 =	THIS_MODULE,
67	}
68};
69
70static int __init sm3_generic_mod_init(void)
71{
72	return crypto_register_shash(&sm3_alg);
73}
74
75static void __exit sm3_generic_mod_fini(void)
76{
77	crypto_unregister_shash(&sm3_alg);
78}
79
80subsys_initcall(sm3_generic_mod_init);
81module_exit(sm3_generic_mod_fini);
82
83MODULE_LICENSE("GPL v2");
84MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
85
86MODULE_ALIAS_CRYPTO("sm3");
87MODULE_ALIAS_CRYPTO("sm3-generic");
88