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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef COMMON_BTEA_H
#define COMMON_BTEA_H
#include "common/system.h"
namespace Common {
namespace BTEACrypto {
/**
* Corrected Block TEA (aka XXTEA) for ScummVM.
*
* In cryptography, Corrected Block TEA (often referred to as XXTEA)
* is a block cipher designed to correct weaknesses in the original Block TEA.
*/
/**
* Encrypt data with a specified key.
* @param[in,out] data the data to encrypt
* @param[in] n the size of the data
* @param[in] key the key to use to encrypt the data
*/
void encrypt(uint32 *data, int n, const uint32 *key);
/**
* Decrypt data encrypted before with btea with a specified key.
* @param[in,out] data the data to decrypt
* @param[in] n the size of the data
* @param[in] key the key to use to decrypt the data
*/
void decrypt(uint32 *data, int n, const uint32 *key);
} // End of namespace BTEACrypto
} // End of namespace Common
#endif // COMMON_BTEA_H
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