#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



class CMD5Checksum  
{
public:
   static CString GetMD5(BYTE* pBuf, UINT nLength);
protected:

	CMD5Checksum();
	virtual ~CMD5Checksum() {};


	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
	void DWordToByte(BYTE* Output, DWORD* Input, UINT nLength);
	void ByteToDWord(DWORD* Output, BYTE* Input, UINT nLength);

private:
	BYTE  m_lpszBuffer[64];	
	ULONG m_nCount[2];			
	ULONG m_lMD5[4];		
};

#endif // !defined(AFX_MD5CHECKSUM_H__2BC7928E_4C15_11D3_B2EE_A4A60E20D2C3__INCLUDED_)