#pragma once

#if !defined(AFX_MD5CHECKSUM_H__2BC7928E_4C15_11D3_B2EE_A4A60E20D2C3__INCLUDED_)
#define AFX_MD5CHECKSUM_H__2BC7928E_4C15_11D3_B2EE_A4A60E20D2C3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
/*****************************************************************************************

*****************************************************************************************/
#include "stdafx.h"

class CMD5Checksum  
{
public:
 static CString GetMD5OfString(CString strString);
 //interface functions for the RSA MD5 calculation
 static CString GetMD5(const CString& strFilePath);

protected:
 //constructor/destructor
 CMD5Checksum();
 virtual ~CMD5Checksum() {};

 //RSA MD5 implementation
 void Transform(BYTE Block[64]);
 void Update(BYTE* Input, ULONG nInputLen);
 CString Final();
 inline DWORD RotateLeft(DWORD x, int n);
 inline void FF( DWORD& A, DWORD B, DWORD C, DWORD D, DWORD X, DWORD S, DWORD T);
 inline void GG( DWORD& A, DWORD B, DWORD C, DWORD D, DWORD X, DWORD S, DWORD T);
 inline void HH( DWORD& A, DWORD B, DWORD C, DWORD D, DWORD X, DWORD S, DWORD T);
 inline void II( DWORD& A, DWORD B, DWORD C, DWORD D, DWORD X, DWORD S, DWORD T);

 //utility functions
 inline void DWordToByte(BYTE* Output, DWORD* Input, UINT nLength);
 inline void ByteToDWord(DWORD* Output, BYTE* Input, UINT nLength);

private:
 BYTE  m_lpszBuffer[64];  //input buffer
 ULONG m_nCount[2];   //number of bits, modulo 2^64 (lsb first)
 ULONG m_lMD5[4];   //MD5 checksum
};

#endif // !defined(AFX_MD5CHECKSUM_H__2BC7928E_4C15_11D3_B2EE_A4A60E20D2C3__INCLUDED_)