xtea.h File Reference

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

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

Include dependency graph for xtea.h:

Go to the source code of this file.

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
#define	MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED   -0x0029

Typedefs
typedef struct mbedtls_xtea_context	mbedtls_xtea_context
	XTEA context structure.

Functions
void	mbedtls_xtea_init (mbedtls_xtea_context *ctx)
	Initialize XTEA context.
void	mbedtls_xtea_free (mbedtls_xtea_context *ctx)
	Clear XTEA context.
void	mbedtls_xtea_setup (mbedtls_xtea_context *ctx, const unsigned char key[16])
	XTEA key schedule.
int	mbedtls_xtea_crypt_ecb (mbedtls_xtea_context *ctx, int mode, const unsigned char input[8], unsigned char output[8])
	XTEA cipher function.
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.

Detailed Description

XTEA block cipher (32-bit)

Definition in file xtea.h.

Macro Definition Documentation

MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED

#define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED   -0x0029

XTEA hardware accelerator failed.

Definition at line 67 of file xtea.h.

MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH

#define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH   -0x0028

The data input has an invalid length.

Definition at line 64 of file xtea.h.

MBEDTLS_XTEA_DECRYPT

#define MBEDTLS_XTEA_DECRYPT   0

Definition at line 62 of file xtea.h.

MBEDTLS_XTEA_ENCRYPT

#define MBEDTLS_XTEA_ENCRYPT   1

Definition at line 61 of file xtea.h.

Typedef Documentation

mbedtls_xtea_context

typedef struct mbedtls_xtea_context mbedtls_xtea_context

XTEA context structure.

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

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

mbedtls_xtea_free()

void mbedtls_xtea_free

(

mbedtls_xtea_context *

ctx

)

Clear XTEA context.

Parameters

ctx	XTEA context to be cleared

mbedtls_xtea_init()

void mbedtls_xtea_init

(

mbedtls_xtea_context *

ctx

)

Initialize XTEA context.

Parameters

ctx	XTEA context to be initialized

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