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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");