| /* 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 |