des.cpp

该示例演示了DES的加解密全过程,代码精简,运算速度快

#include<iostream.h>
#include"des.h"   //DES算法所需的数据表和函数
void main()
{
    bool *MBits = new bool[64];
	bool *KBits = new bool[64];
	bool *CBits = new bool[64];
	char Message[8], Cipher[8];
	char Key[8];
	cout<<"请输入明文:";
	cin>>Message;
	cout<<"请输入密钥:";
	cin>>Key;
	ByteToBit(Message, MBits, 64);
	cout<<"明文二进制为：";
	for(int b = 0; b < 64; b++)
		cout<<MBits[b];
	cout<<endl;
	ByteToBit(Key, KBits, 64);
	/////////////////////////////////////////
	cout<<"DES加密："<<endl;
    DES_Encryption(MBits, KBits, CBits);
	cout<<"密文二进制为：";
	for(b = 0; b < 64; b++)
		cout<<CBits[b];
	cout<<endl;
    BitToByte(CBits, Cipher, 64);
	cout<<"密文为:";
	for(int i = 0; i < 8; i++)
	   cout<<Cipher[i];
	cout<<endl;
	/////////////////////////////////////////
	cout<<"DES解密："<<endl;
	DES_Decryption(CBits, KBits, MBits);
	BitToByte(MBits, Message, 64);
    cout<<"明文为:";
	for(i = 0; i < 8; i++)
	   cout<<Message[i];
	cout<<endl;
}