xtea.h File Reference

XTEA block cipher (32-bit) More...

#include "config.h"
#include <stddef.h>
#include <stdint.h>

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Classes
struct	mbedtls_xtea_context
	XTEA context structure. More...

Macros
#define	MBEDTLS_XTEA_ENCRYPT   1
#define	MBEDTLS_XTEA_DECRYPT   0
#define	MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH   -0x0028

Functions
void	mbedtls_xtea_init (mbedtls_xtea_context *ctx)
	Initialize XTEA context. More...
void	mbedtls_xtea_free (mbedtls_xtea_context *ctx)
	Clear XTEA context. More...
void	mbedtls_xtea_setup (mbedtls_xtea_context *ctx, const unsigned char key[16])
	XTEA key schedule. More...
int	mbedtls_xtea_crypt_ecb (mbedtls_xtea_context *ctx, int mode, const unsigned char input[8], unsigned char output[8])
	XTEA cipher function. More...
int	mbedtls_xtea_crypt_cbc (mbedtls_xtea_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output)
	XTEA CBC cipher function. More...
int	mbedtls_xtea_self_test (int verbose)
	Checkup routine. More...

Detailed Description

XTEA block cipher (32-bit)

Copyright (C) 2006-2015, ARM Limited, All Rights Reserved SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This file is part of mbed TLS (https://tls.mbed.org)

Macro Definition Documentation

MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH

#define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH   -0x0028

The data input has an invalid length.

MBEDTLS_XTEA_DECRYPT

#define MBEDTLS_XTEA_DECRYPT   0

MBEDTLS_XTEA_ENCRYPT

#define MBEDTLS_XTEA_ENCRYPT   1

Function Documentation

mbedtls_xtea_crypt_cbc()

int mbedtls_xtea_crypt_cbc	(	mbedtls_xtea_context *	ctx,
		int	mode,
		size_t	length,
		unsigned char	iv[8],
		const unsigned char *	input,
		unsigned char *	output
	)

XTEA CBC cipher function.

Parameters

ctx	XTEA context
mode	MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
length	the length of input, multiple of 8
iv	initialization vector for CBC mode
input	input block
output	output block

Returns

0 if successful, MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0

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mbedtls_xtea_crypt_ecb()

int mbedtls_xtea_crypt_ecb	(	mbedtls_xtea_context *	ctx,
		int	mode,
		const unsigned char	input[8],
		unsigned char	output[8]
	)

XTEA cipher function.

Parameters

ctx	XTEA context
mode	MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
input	8-byte input block
output	8-byte output block

Returns

0 if successful

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mbedtls_xtea_free()

void mbedtls_xtea_free

(

mbedtls_xtea_context *

ctx

)

Clear XTEA context.

Parameters

ctx	XTEA context to be cleared

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mbedtls_xtea_init()

void mbedtls_xtea_init

(

mbedtls_xtea_context *

ctx

)

Initialize XTEA context.

Parameters

ctx	XTEA context to be initialized

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mbedtls_xtea_self_test()

int mbedtls_xtea_self_test

(

int

verbose

)

Checkup routine.

Returns

0 if successful, or 1 if the test failed

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mbedtls_xtea_setup()

void mbedtls_xtea_setup	(	mbedtls_xtea_context *	ctx,
		const unsigned char	key[16]
	)

XTEA key schedule.

Parameters

ctx	XTEA context to be initialized
key	the secret key

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