CCrypto

[Bluesteel]

So nun hier wieder etwas für alle
Verschlüsselungs-Erweiterung für CNetConn

also fangen wir mal an^^
datei namens crypto.h

/*

Cryptography extensions for CNetConn

Currently only implements simple XOR encoding



Dependencies: CString




*/



#ifndef _CRYPTO_H_INC_

#define _CRYPTO_H_INC_



#include <windows.h>

#include "string.h"





#define CRYPT_NONE 0

#define CRYPT_XOR 1



#define CRYPT_STD_KEY "A"





/*

* class CCrypto

*

* En/decrypts generic data e.g. for network communication or secure file storage

*

*/

class CCrypto

{

public:

// Main constructor

// Initializes class and some variables

CCrypto();



// Main destructor

// Frees memory and terminates app

~CCrypto();



int SetMethod(int iMethod);



CString Encrypt(CString strData);

CString Decrypt(CString strData);



CString EncryptXOR(CString, CString);

CString DecryptXOR(CString, CString);



private:

int m_iMethod;

};



#endif // ifdef _CRYPTO_H_INC_


und nun die datei namens crypto.cpp

/*

Cryptography extensions for CNetConn

Currently only implements simple XOR encoding



Dependencies: CString





*/



#include "crypto.h"



/*

* default constructor

*

*/

CCrypto::CCrypto()

{

m_iMethod = CRYPT_NONE;

}



CCrypto::~CCrypto()

{

}



int CCrypto::SetMethod(int iMethod)

{

m_iMethod = iMethod;

return 0;

}



CString CCrypto::Encrypt(CString strData)

{

CString strStdKey = CRYPT_STD_KEY;



switch (m_iMethod)

{

case CRYPT_NONE:

return strData;



case CRYPT_XOR:

return EncryptXOR(strData, strStdKey);



default:

return strData;

}

}



CString CCrypto::Decrypt(CString strData)

{

CString strStdKey = CRYPT_STD_KEY;



switch (m_iMethod)

{

case CRYPT_NONE:

return strData;



case CRYPT_XOR:

return DecryptXOR(strData, strStdKey);



default:

return strData;

}

}



CString CCrypto::EncryptXOR(CString strData, CString strKey)

{

CString strOut;

int iPos;

int iKeyPos = 0;

int iLen = strData.GetLength();

int iKeyLen = strKey.GetLength();



if (!iKeyLen || !iLen) return strOut; // return empty string if data or key is empty



for (iPos = 0; iPos < iLen; iPos++)

{

strOut += strData[iPos] ^ strKey[iKeyPos++];

if (iKeyPos >= iKeyLen) iKeyPos = 0;

}



return strOut;

}



CString CCrypto::DecryptXOR(CString strData, CString strKey)

{

return EncryptXOR(strData, strKey);

}


viel spaß^^