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- /* 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 <[email protected]>
- */
- #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
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