/* 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];}; extern const u32 crypto_sm4_fk[];extern const u32 crypto_sm4_ck[];extern const u8 crypto_sm4_sbox[]; /** * 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