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
22 const 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 };
28 EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
29
30 static 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
37 static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
38 {
39 sm3_final(shash_desc_ctx(desc), out);
40 return 0;
41 }
42
43 static 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
54 static 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
70 static int __init sm3_generic_mod_init(void)
71 {
72 return crypto_register_shash(&sm3_alg);
73 }
74
75 static void __exit sm3_generic_mod_fini(void)
76 {
77 crypto_unregister_shash(&sm3_alg);
78 }
79
80 subsys_initcall(sm3_generic_mod_init);
81 module_exit(sm3_generic_mod_fini);
82
83 MODULE_LICENSE("GPL v2");
84 MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
85
86 MODULE_ALIAS_CRYPTO("sm3");
87 MODULE_ALIAS_CRYPTO("sm3-generic");
88
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