1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Common values for SM3 algorithm
4 *
5 * Copyright (C) 2017 ARM Limited or its affiliates.
6 * Copyright (C) 2017 Gilad Ben-Yossef <gilad@benyossef.com>
7 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
8 */
9
10 #ifndef _CRYPTO_SM3_H
11 #define _CRYPTO_SM3_H
12
13 #include <linux/types.h>
14
15 #define SM3_DIGEST_SIZE 32
16 #define SM3_BLOCK_SIZE 64
17
18 #define SM3_T1 0x79CC4519
19 #define SM3_T2 0x7A879D8A
20
21 #define SM3_IVA 0x7380166f
22 #define SM3_IVB 0x4914b2b9
23 #define SM3_IVC 0x172442d7
24 #define SM3_IVD 0xda8a0600
25 #define SM3_IVE 0xa96f30bc
26 #define SM3_IVF 0x163138aa
27 #define SM3_IVG 0xe38dee4d
28 #define SM3_IVH 0xb0fb0e4e
29
30 extern const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE];
31
32 struct sm3_state {
33 u32 state[SM3_DIGEST_SIZE / 4];
34 u64 count;
35 u8 buffer[SM3_BLOCK_SIZE];
36 };
37
38 /*
39 * Stand-alone implementation of the SM3 algorithm. It is designed to
40 * have as little dependencies as possible so it can be used in the
41 * kexec_file purgatory. In other cases you should generally use the
42 * hash APIs from include/crypto/hash.h. Especially when hashing large
43 * amounts of data as those APIs may be hw-accelerated.
44 *
45 * For details see lib/crypto/sm3.c
46 */
47
48 static inline void sm3_init(struct sm3_state *sctx)
49 {
50 sctx->state[0] = SM3_IVA;
51 sctx->state[1] = SM3_IVB;
52 sctx->state[2] = SM3_IVC;
53 sctx->state[3] = SM3_IVD;
54 sctx->state[4] = SM3_IVE;
55 sctx->state[5] = SM3_IVF;
56 sctx->state[6] = SM3_IVG;
57 sctx->state[7] = SM3_IVH;
58 sctx->count = 0;
59 }
60
61 void sm3_update(struct sm3_state *sctx, const u8 *data, unsigned int len);
62 void sm3_final(struct sm3_state *sctx, u8 *out);
63
64 #endif
65
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