1747c8ce4SGilad Ben-Yossef /* SPDX-License-Identifier: GPL-2.0 */ 2747c8ce4SGilad Ben-Yossef 3747c8ce4SGilad Ben-Yossef /* 4747c8ce4SGilad Ben-Yossef * Common values for the SM4 algorithm 5747c8ce4SGilad Ben-Yossef * Copyright (C) 2018 ARM Limited or its affiliates. 62b31277aSTianjia Zhang * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 7747c8ce4SGilad Ben-Yossef */ 8747c8ce4SGilad Ben-Yossef 9747c8ce4SGilad Ben-Yossef #ifndef _CRYPTO_SM4_H 10747c8ce4SGilad Ben-Yossef #define _CRYPTO_SM4_H 11747c8ce4SGilad Ben-Yossef 12747c8ce4SGilad Ben-Yossef #include <linux/types.h> 13747c8ce4SGilad Ben-Yossef #include <linux/crypto.h> 14747c8ce4SGilad Ben-Yossef 15747c8ce4SGilad Ben-Yossef #define SM4_KEY_SIZE 16 16747c8ce4SGilad Ben-Yossef #define SM4_BLOCK_SIZE 16 17747c8ce4SGilad Ben-Yossef #define SM4_RKEY_WORDS 32 18747c8ce4SGilad Ben-Yossef 19c59de48eSTianjia Zhang struct sm4_ctx { 20747c8ce4SGilad Ben-Yossef u32 rkey_enc[SM4_RKEY_WORDS]; 21747c8ce4SGilad Ben-Yossef u32 rkey_dec[SM4_RKEY_WORDS]; 22747c8ce4SGilad Ben-Yossef }; 23747c8ce4SGilad Ben-Yossef 24*73c919d3STianjia Zhang extern const u32 crypto_sm4_fk[]; 25*73c919d3STianjia Zhang extern const u32 crypto_sm4_ck[]; 26*73c919d3STianjia Zhang extern const u8 crypto_sm4_sbox[]; 27*73c919d3STianjia Zhang 282b31277aSTianjia Zhang /** 292b31277aSTianjia Zhang * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016 302b31277aSTianjia Zhang * @ctx: The location where the computed key will be stored. 312b31277aSTianjia Zhang * @in_key: The supplied key. 322b31277aSTianjia Zhang * @key_len: The length of the supplied key. 332b31277aSTianjia Zhang * 342b31277aSTianjia Zhang * Returns 0 on success. The function fails only if an invalid key size (or 352b31277aSTianjia Zhang * pointer) is supplied. 362b31277aSTianjia Zhang */ 37c59de48eSTianjia Zhang int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key, 38747c8ce4SGilad Ben-Yossef unsigned int key_len); 39747c8ce4SGilad Ben-Yossef 402b31277aSTianjia Zhang /** 412b31277aSTianjia Zhang * sm4_crypt_block - Encrypt or decrypt a single SM4 block 422b31277aSTianjia Zhang * @rk: The rkey_enc for encrypt or rkey_dec for decrypt 432b31277aSTianjia Zhang * @out: Buffer to store output data 442b31277aSTianjia Zhang * @in: Buffer containing the input data 452b31277aSTianjia Zhang */ 462b31277aSTianjia Zhang void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in); 472b31277aSTianjia Zhang 48747c8ce4SGilad Ben-Yossef #endif 49