xtea.c File Reference

XTEA (eXtended TEA) More...

#include "core/crypto.h"
#include "cipher/xtea.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL
#define	DELTA   0x9E3779B9

Functions
__weak_func error_t	xteaInit (XteaContext *context, const uint8_t *key, size_t keyLen)
	Key expansion. More...
__weak_func void	xteaEncryptBlock (XteaContext *context, const uint8_t *input, uint8_t *output)
	Encrypt a 16-byte block using XTEA algorithm. More...
__weak_func void	xteaDecryptBlock (XteaContext *context, const uint8_t *input, uint8_t *output)
	Decrypt a 16-byte block using XTEA algorithm. More...
__weak_func void	xteaDeinit (XteaContext *context)
	Release XTEA context. More...

Variables
const CipherAlgo	xteaCipherAlgo

Detailed Description

XTEA (eXtended TEA)

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2025 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneCRYPTO Open.

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.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.5.4

Definition in file xtea.c.

Macro Definition Documentation

DELTA

#define DELTA   0x9E3779B9

Definition at line 39 of file xtea.c.

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 32 of file xtea.c.

Function Documentation

xteaDecryptBlock()

__weak_func void xteaDecryptBlock	(	XteaContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Decrypt a 16-byte block using XTEA algorithm.

Parameters

[in]	context	Pointer to the XTEA context
[in]	input	Ciphertext block to decrypt
[out]	output	Plaintext block resulting from decryption

Definition at line 134 of file xtea.c.

xteaDeinit()

__weak_func void xteaDeinit

(

XteaContext *

context

)

Release XTEA context.

Parameters

[in]

context

Pointer to the XTEA context

Definition at line 168 of file xtea.c.

xteaEncryptBlock()

__weak_func void xteaEncryptBlock	(	XteaContext *	context,
		const uint8_t *	input,
		uint8_t *	output
	)

Encrypt a 16-byte block using XTEA algorithm.

Parameters

[in]	context	Pointer to the XTEA context
[in]	input	Plaintext block to encrypt
[out]	output	Ciphertext block resulting from encryption

Definition at line 98 of file xtea.c.

xteaInit()

__weak_func error_t xteaInit	(	XteaContext *	context,
		const uint8_t *	key,
		size_t	keyLen
	)

Key expansion.

Parameters

[in]	context	Pointer to the XTEA context to initialize
[in]	key	Pointer to the key
[in]	keyLen	Length of the key

Returns

Error code

Definition at line 69 of file xtea.c.

Variable Documentation

xteaCipherAlgo

const CipherAlgo xteaCipherAlgo

Initial value:

=
{
   "XTEA",
   sizeof(XteaContext),
   CIPHER_ALGO_TYPE_BLOCK,
   XTEA_BLOCK_SIZE,
   (CipherAlgoInit) xteaInit,
   NULL,
   NULL,
   (CipherAlgoEncryptBlock) xteaEncryptBlock,
   (CipherAlgoDecryptBlock) xteaDecryptBlock,
   (CipherAlgoDeinit) xteaDeinit
}

Definition at line 46 of file xtea.c.