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1/* SPDX-License-Identifier: GPL-2.0 */2 3/*4 * Common values for the SM4 algorithm5 * Copyright (C) 2018 ARM Limited or its affiliates.6 * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>7 */8 9#ifndef _CRYPTO_SM4_H10#define _CRYPTO_SM4_H11 12#include <linux/types.h>13#include <linux/crypto.h>14 15#define SM4_KEY_SIZE 1616#define SM4_BLOCK_SIZE 1617#define SM4_RKEY_WORDS 3218 19struct sm4_ctx {20 u32 rkey_enc[SM4_RKEY_WORDS];21 u32 rkey_dec[SM4_RKEY_WORDS];22};23 24extern const u32 crypto_sm4_fk[];25extern const u32 crypto_sm4_ck[];26extern const u8 crypto_sm4_sbox[];27 28/**29 * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-201630 * @ctx: The location where the computed key will be stored.31 * @in_key: The supplied key.32 * @key_len: The length of the supplied key.33 *34 * Returns 0 on success. The function fails only if an invalid key size (or35 * pointer) is supplied.36 */37int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key,38 unsigned int key_len);39 40/**41 * sm4_crypt_block - Encrypt or decrypt a single SM4 block42 * @rk: The rkey_enc for encrypt or rkey_dec for decrypt43 * @out: Buffer to store output data44 * @in: Buffer containing the input data45 */46void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in);47 48#endif49