CWE-ou-minkata/Sources/Plasma/NucleusLib/pnUtils/Intern.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 or by snail mail at:
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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Intern.h
*   
***/

#ifdef PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_INTERN_H
#error "Header $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Intern.h included more than once"
#endif
#define PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_INTERN_H



/*****************************************************************************
*
*   Crypt
*
***/

namespace Crypt {

//============================================================================
class KeyBase {
public:
    virtual void Codec (bool encrypt, ARRAY(byte) * dest, unsigned sourceBytes, const void * sourceData) = 0;
    virtual unsigned GetBlockSize () const = 0;
};

//============================================================================
class KeyRc4 : public KeyBase {
private:
    unsigned m_x;
    unsigned m_y;
    byte     m_state[256];

    void Initialize (unsigned bytes, const void * data);

public:
    KeyRc4 (unsigned bytes, const void * data) { Initialize(bytes, data); }

    void Codec (bool encrypt, ARRAY(byte) * dest, unsigned sourceBytes, const void * sourceData);
    unsigned GetBlockSize () const { return 1; }

    static void KeyGen (
        unsigned        randomBytes, 
        const void *    randomData,
        ARRAY(byte) *   privateData
    );
};


} // namespace Crypt