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(sctx: 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(sctx: 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, out: 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(alg: &sm3_alg); |
73 | } |
74 | |
75 | static void __exit sm3_generic_mod_fini(void) |
76 | { |
77 | crypto_unregister_shash(alg: &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 | |