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44 lines
1.1 KiB
44 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Common values for the SM4 algorithm |
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* Copyright (C) 2018 ARM Limited or its affiliates. |
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* Copyright (c) 2021 Tianjia Zhang <[email protected]> |
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*/ |
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#ifndef _CRYPTO_SM4_H |
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#define _CRYPTO_SM4_H |
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#include <linux/types.h> |
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#include <linux/crypto.h> |
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#define SM4_KEY_SIZE 16 |
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#define SM4_BLOCK_SIZE 16 |
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#define SM4_RKEY_WORDS 32 |
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struct sm4_ctx { |
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u32 rkey_enc[SM4_RKEY_WORDS]; |
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u32 rkey_dec[SM4_RKEY_WORDS]; |
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}; |
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/** |
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* sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016 |
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* @ctx: The location where the computed key will be stored. |
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* @in_key: The supplied key. |
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* @key_len: The length of the supplied key. |
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* |
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* Returns 0 on success. The function fails only if an invalid key size (or |
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* pointer) is supplied. |
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*/ |
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int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key, |
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unsigned int key_len); |
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/** |
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* sm4_crypt_block - Encrypt or decrypt a single SM4 block |
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* @rk: The rkey_enc for encrypt or rkey_dec for decrypt |
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* @out: Buffer to store output data |
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* @in: Buffer containing the input data |
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*/ |
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void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in); |
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#endif
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