mbed TLS library

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xtea.h File Reference

xtea.h File Reference

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

Go to the source code of this file.

Data Structures

struct  xtea_context
 XTEA context structure. More...

Functions

void xtea_init (xtea_context *ctx)
 Initialize XTEA context.
void xtea_free (xtea_context *ctx)
 Clear XTEA context.
void xtea_setup (xtea_context *ctx, const unsigned char key[16])
 XTEA key schedule.
int xtea_crypt_ecb (xtea_context *ctx, int mode, const unsigned char input[8], unsigned char output[8])
 XTEA cipher function.
int xtea_crypt_cbc (xtea_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output)
 XTEA CBC cipher function.
int xtea_self_test (int verbose)
 Checkup routine.

Detailed Description

XTEA block cipher (32-bit)

Copyright (C) 2006-2013, ARM Limited, All Rights Reserved

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

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Definition in file xtea.h.


Function Documentation

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

XTEA CBC cipher function.

Parameters:
ctxXTEA context
modeXTEA_ENCRYPT or XTEA_DECRYPT
lengththe length of input, multiple of 8
ivinitialization vector for CBC mode
inputinput block
outputoutput block
Returns:
0 if successful, POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0

Definition at line 148 of file xtea.c.

int xtea_crypt_ecb ( xtea_context ctx,
int  mode,
const unsigned char  input[8],
unsigned char  output[8] 
)

XTEA cipher function.

Parameters:
ctxXTEA context
modeXTEA_ENCRYPT or XTEA_DECRYPT
input8-byte input block
output8-byte output block
Returns:
0 if successful

Definition at line 105 of file xtea.c.

void xtea_free ( xtea_context ctx )

Clear XTEA context.

Parameters:
ctxXTEA context to be cleared

Definition at line 79 of file xtea.c.

void xtea_init ( xtea_context ctx )

Initialize XTEA context.

Parameters:
ctxXTEA context to be initialized

Definition at line 74 of file xtea.c.

int xtea_self_test ( int  verbose )

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Definition at line 241 of file xtea.c.

void xtea_setup ( xtea_context ctx,
const unsigned char  key[16] 
)

XTEA key schedule.

Parameters:
ctxXTEA context to be initialized
keythe secret key

Definition at line 90 of file xtea.c.