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Tip revision: 8bb7eca972ad531c9b149c0a51ab43a417385813 authored by Linus Torvalds on 31 October 2021, 20:53:10 UTC
Linux 5.15
Linux 5.15
Tip revision: 8bb7eca
sm4.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Common values for the SM4 algorithm
* Copyright (C) 2018 ARM Limited or its affiliates.
* Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*/
#ifndef _CRYPTO_SM4_H
#define _CRYPTO_SM4_H
#include <linux/types.h>
#include <linux/crypto.h>
#define SM4_KEY_SIZE 16
#define SM4_BLOCK_SIZE 16
#define SM4_RKEY_WORDS 32
struct sm4_ctx {
u32 rkey_enc[SM4_RKEY_WORDS];
u32 rkey_dec[SM4_RKEY_WORDS];
};
/**
* sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016
* @ctx: The location where the computed key will be stored.
* @in_key: The supplied key.
* @key_len: The length of the supplied key.
*
* Returns 0 on success. The function fails only if an invalid key size (or
* pointer) is supplied.
*/
int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key,
unsigned int key_len);
/**
* sm4_crypt_block - Encrypt or decrypt a single SM4 block
* @rk: The rkey_enc for encrypt or rkey_dec for decrypt
* @out: Buffer to store output data
* @in: Buffer containing the input data
*/
void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in);
#endif