[thirdparty/u-boot.git] / include / uboot_aes.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2010 - 2011 NVIDIA Corporation <www.nvidia.com>
 */

#ifndef _AES_REF_H_
#define _AES_REF_H_

#ifdef USE_HOSTCC
/* Define compat stuff for use in fw_* tools. */
typedef unsigned char u8;
typedef unsigned int u32;
#define debug(...) do {} while (0)
#endif

/*
 * AES encryption library, with small code size, supporting only 128-bit AES
 *
 * AES is a stream cipher which works a block at a time, with each block
 * in this case being AES_BLOCK_LENGTH bytes.
 */

enum {
	AES_STATECOLS	= 4,	/* columns in the state & expanded key */
	AES128_KEYCOLS	= 4,	/* columns in a key for aes128 */
	AES192_KEYCOLS	= 6,	/* columns in a key for aes128 */
	AES256_KEYCOLS	= 8,	/* columns in a key for aes128 */
	AES128_ROUNDS	= 10,	/* rounds in encryption for aes128 */
	AES192_ROUNDS	= 12,	/* rounds in encryption for aes192 */
	AES256_ROUNDS	= 14,	/* rounds in encryption for aes256 */
	AES128_KEY_LENGTH	= 128 / 8,
	AES192_KEY_LENGTH	= 192 / 8,
	AES256_KEY_LENGTH	= 256 / 8,
	AES128_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES128_ROUNDS + 1),
	AES192_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES192_ROUNDS + 1),
	AES256_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES256_ROUNDS + 1),
	AES_BLOCK_LENGTH	= 128 / 8,
};

/**
 * aes_expand_key() - Expand the AES key
 *
 * Expand a key into a key schedule, which is then used for the other
 * operations.
 *
 * @key		Key
 * @key_size	Size of the key (in bits)
 * @expkey	Buffer to place expanded key, AES_EXPAND_KEY_LENGTH
 */
void aes_expand_key(u8 *key, u32 key_size, u8 *expkey);

/**
 * aes_encrypt() - Encrypt single block of data with AES 128
 *
 * @key_size	Size of the aes key (in bits)
 * @in		Input data
 * @expkey	Expanded key to use for encryption (from aes_expand_key())
 * @out		Output data
 */
void aes_encrypt(u32 key_size, u8 *in, u8 *expkey, u8 *out);

/**
 * aes_decrypt() - Decrypt single block of data with AES 128
 *
 * @key_size	Size of the aes key (in bits)
 * @in		Input data
 * @expkey	Expanded key to use for decryption (from aes_expand_key())
 * @out		Output data
 */
void aes_decrypt(u32 key_size, u8 *in, u8 *expkey, u8 *out);

/**
 * Apply chain data to the destination using EOR
 *
 * Each array is of length AES_BLOCK_LENGTH.
 *
 * @cbc_chain_data	Chain data
 * @src			Source data
 * @dst			Destination data, which is modified here
 */
void aes_apply_cbc_chain_data(u8 *cbc_chain_data, u8 *src, u8 *dst);

/**
 * aes_cbc_encrypt_blocks() - Encrypt multiple blocks of data with AES CBC.
 *
 * @key_size		Size of the aes key (in bits)
 * @key_exp		Expanded key to use
 * @iv			Initialization vector
 * @src			Source data to encrypt
 * @dst			Destination buffer
 * @num_aes_blocks	Number of AES blocks to encrypt
 */
void aes_cbc_encrypt_blocks(u32 key_size, u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
			    u32 num_aes_blocks);

/**
 * Decrypt multiple blocks of data with AES CBC.
 *
 * @key_size		Size of the aes key (in bits)
 * @key_exp		Expanded key to use
 * @iv			Initialization vector
 * @src			Source data to decrypt
 * @dst			Destination buffer
 * @num_aes_blocks	Number of AES blocks to decrypt
 */
void aes_cbc_decrypt_blocks(u32 key_size, u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
			    u32 num_aes_blocks);

#endif /* _AES_REF_H_ */
Commit	Line	Data
83d290c5	1	/* SPDX-License-Identifier: GPL-2.0+ */
5b1a5451 YL	2	/*
	3	* Copyright (c) 2011 The Chromium OS Authors.
	4	* (C) Copyright 2010 - 2011 NVIDIA Corporation <www.nvidia.com>
5b1a5451 YL	5	*/
	6
	7	#ifndef _AES_REF_H_
	8	#define _AES_REF_H_
	9
a8a752c0 MV	10	#ifdef USE_HOSTCC
	11	/* Define compat stuff for use in fw_* tools. */
	12	typedef unsigned char u8;
	13	typedef unsigned int u32;
	14	#define debug(...) do {} while (0)
	15	#endif
	16
5b1a5451 YL	17	/*
	18	* AES encryption library, with small code size, supporting only 128-bit AES
	19	*
	20	* AES is a stream cipher which works a block at a time, with each block
7012c04e	21	* in this case being AES_BLOCK_LENGTH bytes.
5b1a5451 YL	22	*/
	23
	24	enum {
	25	AES_STATECOLS = 4, /* columns in the state & expanded key */
8302d170 PR	26	AES128_KEYCOLS = 4, /* columns in a key for aes128 */
	27	AES192_KEYCOLS = 6, /* columns in a key for aes128 */
	28	AES256_KEYCOLS = 8, /* columns in a key for aes128 */
	29	AES128_ROUNDS = 10, /* rounds in encryption for aes128 */
	30	AES192_ROUNDS = 12, /* rounds in encryption for aes192 */
	31	AES256_ROUNDS = 14, /* rounds in encryption for aes256 */
	32	AES128_KEY_LENGTH = 128 / 8,
	33	AES192_KEY_LENGTH = 192 / 8,
	34	AES256_KEY_LENGTH = 256 / 8,
	35	AES128_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES128_ROUNDS + 1),
	36	AES192_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES192_ROUNDS + 1),
	37	AES256_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES256_ROUNDS + 1),
7012c04e	38	AES_BLOCK_LENGTH = 128 / 8,
5b1a5451 YL	39	};
	40
	41	/**
957ba85c MV	42	* aes_expand_key() - Expand the AES key
957ba85c MV	43	*
5b1a5451 YL	44	* Expand a key into a key schedule, which is then used for the other
	45	* operations.
	46	*
8302d170 PR	47	* @key Key
8302d170 PR	48	* @key_size Size of the key (in bits)
957ba85c	49	* @expkey Buffer to place expanded key, AES_EXPAND_KEY_LENGTH
5b1a5451	50	*/
8302d170	51	void aes_expand_key(u8 key, u32 key_size, u8 expkey);
5b1a5451 YL	52
5b1a5451 YL	53	/**
957ba85c	54	* aes_encrypt() - Encrypt single block of data with AES 128
5b1a5451	55	*
8302d170	56	* @key_size Size of the aes key (in bits)
957ba85c MV	57	* @in Input data
	58	* @expkey Expanded key to use for encryption (from aes_expand_key())
	59	* @out Output data
5b1a5451	60	*/
8302d170	61	void aes_encrypt(u32 key_size, u8 in, u8 expkey, u8 *out);
5b1a5451 YL	62
5b1a5451 YL	63	/**
957ba85c	64	* aes_decrypt() - Decrypt single block of data with AES 128
5b1a5451	65	*
8302d170	66	* @key_size Size of the aes key (in bits)
957ba85c MV	67	* @in Input data
	68	* @expkey Expanded key to use for decryption (from aes_expand_key())
	69	* @out Output data
5b1a5451	70	*/
8302d170	71	void aes_decrypt(u32 key_size, u8 in, u8 expkey, u8 *out);
5b1a5451	72
53eb768d SW	73	/**
	74	* Apply chain data to the destination using EOR
	75	*
7012c04e	76	* Each array is of length AES_BLOCK_LENGTH.
53eb768d SW	77	*
	78	* @cbc_chain_data Chain data
	79	* @src Source data
	80	* @dst Destination data, which is modified here
	81	*/
	82	void aes_apply_cbc_chain_data(u8 cbc_chain_data, u8 src, u8 *dst);
	83
6e7b9f4f MV	84	/**
	85	* aes_cbc_encrypt_blocks() - Encrypt multiple blocks of data with AES CBC.
	86	*
8302d170	87	* @key_size Size of the aes key (in bits)
6e7b9f4f	88	* @key_exp Expanded key to use
af09eba6	89	* @iv Initialization vector
6e7b9f4f MV	90	* @src Source data to encrypt
	91	* @dst Destination buffer
	92	* @num_aes_blocks Number of AES blocks to encrypt
	93	*/
8302d170	94	void aes_cbc_encrypt_blocks(u32 key_size, u8 key_exp, u8 iv, u8 src, u8 dst,
af09eba6	95	u32 num_aes_blocks);
6e7b9f4f	96
dc24bb6d MV	97	/**
	98	* Decrypt multiple blocks of data with AES CBC.
	99	*
8302d170	100	* @key_size Size of the aes key (in bits)
dc24bb6d	101	* @key_exp Expanded key to use
af09eba6	102	* @iv Initialization vector
dc24bb6d MV	103	* @src Source data to decrypt
	104	* @dst Destination buffer
	105	* @num_aes_blocks Number of AES blocks to decrypt
	106	*/
8302d170	107	void aes_cbc_decrypt_blocks(u32 key_size, u8 key_exp, u8 iv, u8 src, u8 dst,
af09eba6	108	u32 num_aes_blocks);
dc24bb6d	109
5b1a5451	110	#endif /* _AES_REF_H_ */