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
30extern const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE];
31
32struct 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
48static 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
61void sm3_update(struct sm3_state *sctx, const u8 *data, unsigned int len);
62void sm3_final(struct sm3_state *sctx, u8 *out);
63
64#endif
65