sm3.h

 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#define SM3_STATE_SIZE	40
18
19#define SM3_T1		0x79CC4519
20#define SM3_T2		0x7A879D8A
21
22#define SM3_IVA		0x7380166f
23#define SM3_IVB		0x4914b2b9
24#define SM3_IVC		0x172442d7
25#define SM3_IVD		0xda8a0600
26#define SM3_IVE		0xa96f30bc
27#define SM3_IVF		0x163138aa
28#define SM3_IVG		0xe38dee4d
29#define SM3_IVH		0xb0fb0e4e
30
31extern const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE];
32
33struct sm3_state {
34	u32 state[SM3_DIGEST_SIZE / 4];
35	u64 count;
36	u8 buffer[SM3_BLOCK_SIZE];
37};
38
39/*
40 * Stand-alone implementation of the SM3 algorithm. It is designed to
41 * have as little dependencies as possible so it can be used in the
42 * kexec_file purgatory. In other cases you should generally use the
43 * hash APIs from include/crypto/hash.h. Especially when hashing large
44 * amounts of data as those APIs may be hw-accelerated.
45 *
46 * For details see lib/crypto/sm3.c
47 */
48
49static inline void sm3_init(struct sm3_state *sctx)
50{
51	sctx->state[0] = SM3_IVA;
52	sctx->state[1] = SM3_IVB;
53	sctx->state[2] = SM3_IVC;
54	sctx->state[3] = SM3_IVD;
55	sctx->state[4] = SM3_IVE;
56	sctx->state[5] = SM3_IVF;
57	sctx->state[6] = SM3_IVG;
58	sctx->state[7] = SM3_IVH;
59	sctx->count = 0;
60}
61
62void sm3_block_generic(struct sm3_state *sctx, u8 const *data, int blocks);
63
64#endif