Protecting an Application's Unauthorized Copy

//
// CertificateMgr.h
//
// This is a helper class to manage certificates in your executable file.
//
// Compilation instruction:
//	1. Add imagehlp.lib file in your addtional libraries.
// Goto project Properties > Linker > Input > Additional Dependencies
//
// Author
//		Manish Agarwal (manish.k.agarwal@gmail.com)
//

#include <windows.h>

class CertificateMgr
{
public:
	CertificateMgr() : mFileHandle(INVALID_HANDLE_VALUE) {};
	~CertificateMgr();
	BOOL Init(const char * const imageName);
	BOOL IsValidCopy();
	BOOL SignDLL();
protected:
	BOOL IsCertificatePresent();
	BOOL AddCertificate(BOOL bSign = FALSE);
	void RemoveCertificate(); // prototype just for future
	int GetUniqueData(void *&pData);
	int GetSigningData(void *&pData);
private:
	HANDLE mFileHandle;
};