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150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/**
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* \file xtea.h
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*
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* \brief XTEA block cipher (32-bit)
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_XTEA_H
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#define POLARSSL_XTEA_H
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#if !defined(POLARSSL_CONFIG_FILE)
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#include "config.h"
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#else
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#include POLARSSL_CONFIG_FILE
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#endif
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#include <string.h>
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#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
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#include <basetsd.h>
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typedef UINT32 uint32_t;
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#else
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#include <inttypes.h>
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#endif
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#define XTEA_ENCRYPT 1
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#define XTEA_DECRYPT 0
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#define POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH -0x0028 /**< The data input has an invalid length. */
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#if !defined(POLARSSL_XTEA_ALT)
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// Regular implementation
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//
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief XTEA context structure
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*/
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typedef struct
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{
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uint32_t k[4]; /*!< key */
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}
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xtea_context;
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/**
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* \brief Initialize XTEA context
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*
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* \param ctx XTEA context to be initialized
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*/
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void xtea_init( xtea_context *ctx );
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/**
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* \brief Clear XTEA context
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*
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* \param ctx XTEA context to be cleared
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*/
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void xtea_free( xtea_context *ctx );
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/**
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* \brief XTEA key schedule
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*
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* \param ctx XTEA context to be initialized
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* \param key the secret key
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*/
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void xtea_setup( xtea_context *ctx, const unsigned char key[16] );
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/**
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* \brief XTEA cipher function
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*
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* \param ctx XTEA context
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* \param mode XTEA_ENCRYPT or XTEA_DECRYPT
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* \param input 8-byte input block
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* \param output 8-byte output block
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*
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* \return 0 if successful
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*/
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int xtea_crypt_ecb( xtea_context *ctx,
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int mode,
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const unsigned char input[8],
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unsigned char output[8] );
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#if defined(POLARSSL_CIPHER_MODE_CBC)
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/**
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* \brief XTEA CBC cipher function
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*
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* \param ctx XTEA context
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* \param mode XTEA_ENCRYPT or XTEA_DECRYPT
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* \param length the length of input, multiple of 8
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* \param iv initialization vector for CBC mode
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* \param input input block
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* \param output output block
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*
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* \return 0 if successful,
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* POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
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*/
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int xtea_crypt_cbc( xtea_context *ctx,
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int mode,
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size_t length,
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unsigned char iv[8],
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const unsigned char *input,
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unsigned char *output);
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#endif /* POLARSSL_CIPHER_MODE_CBC */
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#ifdef __cplusplus
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}
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#endif
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#else /* POLARSSL_XTEA_ALT */
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#include "xtea_alt.h"
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#endif /* POLARSSL_XTEA_ALT */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int xtea_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* xtea.h */
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