textbittobyte.java

用java改写的des程序

import java.io.*;
class testbittobyte{
	 public static void main(String args[])throws IOException
	  {  char[] e=new char[4];
	     int i;
	     des d=new des();
	     char[] m={'0','0','0','E'};/*java的unicode,每个字符16位*/
	     char[] k={'0','1','C','4'};
	     
	    
	     
	     for(i=0;i<4;i++)//明文
	     System.out.print(m[i]);
	     System.out.println();
	      
	     e=d.encryption(m,k);//密文
	     for(i=0;i<4;i++) 
	     System.out.print((int)e[i]+" ");
	     
	     System.out.println();
	     
	      
	     e=d.uncryption(e,k);//解密成明文
	     for(i=0;i<4;i++) 
	     System.out.print(e[i]);
	     System.out.println(); 
	    
	 	}
	}