crsa.h

rsa加密算法很好的例子

// CRSA.h: interface for the CRSA class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CRSA_H__D7039401_2841_409D_80D5_57B449330A4A__INCLUDED_)
#define AFX_CRSA_H__D7039401_2841_409D_80D5_57B449330A4A__INCLUDED_

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

#include <stdlib.h>

class CRSA  
{
public:
	bool verify(long,long,long);
	CRSA();
	virtual ~CRSA();

	char* Encrypt(char*,long,long,long);
	char* Decrypt(char*,long,long,long);

private:
	bool isPrime(long);
	long getNextToDec(int&,int,char*);
	long calcDecExp(long,long,long);
	int getNumLength(long);
	long process(long,long,long,long);
	long square(long,long,long);
	int convDataToNum(char,char);
	long add(long,long,long,long);
	char* compFour(long,int);

	char* nums;
};

#endif // !defined(AFX_CRSA_H__D7039401_2841_409D_80D5_57B449330A4A__INCLUDED_)