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56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef COMMON_BTEA_H
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#define COMMON_BTEA_H
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#include "common/system.h"
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namespace Common {
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namespace BTEACrypto {
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/**
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* Corrected Block TEA (aka XXTEA) for ScummVM.
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*
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* In cryptography, Corrected Block TEA (often referred to as XXTEA)
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* is a block cipher designed to correct weaknesses in the original Block TEA.
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*/
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/**
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* Encrypt data with a specified key.
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* @param[in,out] data the data to encrypt
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* @param[in] n the size of the data
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* @param[in] key the key to use to encrypt the data
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*/
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void encrypt(uint32 *data, int n, const uint32 *key);
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/**
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* Decrypt data encrypted before with btea with a specified key.
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* @param[in,out] data the data to decrypt
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* @param[in] n the size of the data
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* @param[in] key the key to use to decrypt the data
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*/
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void decrypt(uint32 *data, int n, const uint32 *key);
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} // End of namespace BTEACrypto
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} // End of namespace Common
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#endif // COMMON_BTEA_H
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