mainframe.java

网络信息与安全技术中的MD5算法和RSA算法的java实现

package cn.com.rsa;

import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JTextField;
import javax.swing.JButton;

public class MainFrame extends JFrame {

	private static final long serialVersionUID = 1L;

	private JPanel jContentPane = null;

	private JLabel jLabel = null;

	private JTextField jTextField = null;

	private JLabel jLabel1 = null;

	private JTextField jTextField1 = null;

	private JLabel jLabel2 = null;

	private JTextField jTextField2 = null;

	private JLabel jLabel3 = null;

	private JTextField jTextField3 = null;

	private JLabel jLabel4 = null;

	private JTextField jTextField4 = null;

	private JLabel jLabel5 = null;

	private JButton jButton = null;

	private JTextField jTextField5 = null;

	private JButton jButton1 = null;

	private JLabel jLabel6 = null;

	private JTextField jTextField6 = null;

	private JButton jButton2 = null;

	private JLabel jLabel7 = null;

	private JTextField jTextField7 = null;

	private JButton jButton3 = null;

	private JLabel jLabel8 = null;

	private JTextField jTextField8 = null;

  private int p	= 0;
  private int q	=	0;
  private long n = 0;
  private long m = 0;
  
  private long public_key = 0;			//公匙
  private long private_key = 0;			//密匙
  
  private long text = 0;						//明文
  private long secretword = 0;			//密文
  private long word = 0;						//解密后明文
	/**
	 * This is the default constructor
	 */
	public MainFrame() {
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		this.setSize(500, 315);
		this.setContentPane(getJContentPane());
		this.setTitle("RSA算法演示");
	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jLabel8 = new JLabel();
			jLabel8.setBounds(new Rectangle(15, 239, 104, 30));
			jLabel8.setText("解密后所得明文：");
			jLabel7 = new JLabel();
			jLabel7.setBounds(new Rectangle(15, 195, 80, 30));
			jLabel7.setText("加密后密文：");
			jLabel6 = new JLabel();
			jLabel6.setBounds(new Rectangle(15, 151, 80, 30));
			jLabel6.setText("请输入明文：");
			jLabel5 = new JLabel();
			jLabel5.setBounds(new Rectangle(184, 105, 80, 30));
			jLabel5.setText("得到密钥 D ：");
			jLabel4 = new JLabel();
			jLabel4.setBounds(new Rectangle(15, 105, 93, 30));
			jLabel4.setText("请输入公钥 E ：");
			jLabel3 = new JLabel();
			jLabel3.setBounds(new Rectangle(193, 61, 38, 30));
			jLabel3.setText("  ф：");
			jLabel2 = new JLabel();
			jLabel2.setBounds(new Rectangle(15, 61, 61, 30));
			jLabel2.setText("模数 N ：");
			jLabel1 = new JLabel();
			jLabel1.setBounds(new Rectangle(233, 15, 26, 30));
			jLabel1.setText("   Q");
			jLabel = new JLabel();
			jLabel.setBounds(new Rectangle(15, 15, 126, 30));
			jLabel.setText("请输入两个素数： P");
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(jLabel, null);
			jContentPane.add(getJTextField(), null);
			jContentPane.add(jLabel1, null);
			jContentPane.add(getJTextField1(), null);
			jContentPane.add(jLabel2, null);
			jContentPane.add(getJTextField2(), null);
			jContentPane.add(jLabel3, null);
			jContentPane.add(getJTextField3(), null);
			jContentPane.add(jLabel4, null);
			jContentPane.add(getJTextField4(), null);
			jContentPane.add(jLabel5, null);
			jContentPane.add(getJButton(), null);
			jContentPane.add(getJTextField5(), null);
			jContentPane.add(getJButton1(), null);
			jContentPane.add(jLabel6, null);
			jContentPane.add(getJTextField6(), null);
			jContentPane.add(getJButton2(), null);
			jContentPane.add(jLabel7, null);
			jContentPane.add(getJTextField7(), null);
			jContentPane.add(getJButton3(), null);
			jContentPane.add(jLabel8, null);
			jContentPane.add(getJTextField8(), null);
		}
		return jContentPane;
	}

	/**
	 * This method initializes jTextField	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField() {
		if (jTextField == null) {
			jTextField = new JTextField();
			jTextField.setBounds(new Rectangle(145, 15, 80, 30));
		}
		return jTextField;
	}

	/**
	 * This method initializes jTextField1	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField1() {
		if (jTextField1 == null) {
			jTextField1 = new JTextField();
			jTextField1.setBounds(new Rectangle(264, 15, 80, 30));
		}
		return jTextField1;
	}

	/**
	 * This method initializes jTextField2	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField2() {
		if (jTextField2 == null) {
			jTextField2 = new JTextField();
			jTextField2.setBounds(new Rectangle(78, 61, 103, 30));
		}
		return jTextField2;
	}

	/**
	 * This method initializes jTextField3	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField3() {
		if (jTextField3 == null) {
			jTextField3 = new JTextField();
			jTextField3.setBounds(new Rectangle(235, 61, 111, 30));
		}
		return jTextField3;
	}

	/**
	 * This method initializes jTextField4	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField4() {
		if (jTextField4 == null) {
			jTextField4 = new JTextField();
			jTextField4.setBounds(new Rectangle(111, 106, 70, 30));
		}
		return jTextField4;
	}

	/**
	 * This method initializes jButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	public JButton getJButton() {
		if (jButton == null) {
			jButton = new JButton();
			jButton.setBounds(new Rectangle(358, 61, 107, 30));
			jButton.setText("计算 N 和 ф");
			jButton.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
		    	do{
		    		String br1 = jTextField.getText();
		    		p = Integer.parseInt(br1);
		    		String br2 = jTextField1.getText();
		    		q = Integer.parseInt(br2);
		    	}while(!primenumber(p) && !primenumber(q));
						
					n = (long)p * q;
					m = (long)(p - 1) * (q - 1);
					
					jTextField2.setText(String.valueOf(n));
					jTextField3.setText(String.valueOf(m));
				}
			});
		}
		return jButton;
	}

	/**
	 * This method initializes jTextField5	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField5() {
		if (jTextField5 == null) {
			jTextField5 = new JTextField();
			jTextField5.setBounds(new Rectangle(265, 106, 82, 30));
		}
		return jTextField5;
	}

	/**
	 * This method initializes jButton1	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getJButton1() {
		if (jButton1 == null) {
			jButton1 = new JButton();
			jButton1.setBounds(new Rectangle(360, 106, 105, 30));
			jButton1.setText("计算密钥 D");
			jButton1.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					if((public_key >= m) || (gcd(m,public_key)!=1)){
            String br = jTextField4.getText();
            public_key = Long.parseLong(br);	
            
  	        long value = 1;
  	        outer:
  	        	for(long i=1;;i++){
  	            value = i * m + 1;
  	            if((value % public_key == 0) && (value / public_key < m)){
  	              private_key = value / public_key;
  	              break outer;
  	            }
  	          }
  	        jTextField5.setText(String.valueOf(private_key));
					}
				}
			});
		}
		return jButton1;
	}

	/**
	 * This method initializes jTextField6	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField6() {
		if (jTextField6 == null) {
			jTextField6 = new JTextField();
			jTextField6.setBounds(new Rectangle(99, 150, 249, 30));
		}
		return jTextField6;
	}

	/**
	 * This method initializes jButton2	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getJButton2() {
		if (jButton2 == null) {
			jButton2 = new JButton();
			jButton2.setBounds(new Rectangle(360, 150, 105, 30));
			jButton2.setText("加 密");
			jButton2.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
          String br1 = jTextField6.getText();
          text = Long.parseLong(br1);
          String br2 = jTextField2.getText();
          n = Long.parseLong(br2);
          String br3 = jTextField4.getText();
          public_key = Long.parseLong(br3);

	        secretword = colum(text, n, public_key);					
	        jTextField7.setText(String.valueOf(secretword));
				}
			});
		}
		return jButton2;
	}

	/**
	 * This method initializes jTextField7	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField7() {
		if (jTextField7 == null) {
			jTextField7 = new JTextField();
			jTextField7.setBounds(new Rectangle(99, 195, 247, 30));
		}
		return jTextField7;
	}

	/**
	 * This method initializes jButton3	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getJButton3() {
		if (jButton3 == null) {
			jButton3 = new JButton();
			jButton3.setBounds(new Rectangle(360, 196, 106, 30));
			jButton3.setText("解 密");
			jButton3.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
          String br1 = jTextField7.getText();
          secretword = Long.parseLong(br1);
          String br2 = jTextField2.getText();
          n = Long.parseLong(br2);
          String br3 = jTextField5.getText();
          private_key = Long.parseLong(br3);

          word = colum(secretword, n, private_key);				
	        jTextField8.setText(String.valueOf(word));
				}
			});
		}
		return jButton3;
	}

	/**
	 * This method initializes jTextField8	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	public JTextField getJTextField8() {
		if (jTextField8 == null) {
			jTextField8 = new JTextField();
			jTextField8.setBounds(new Rectangle(126, 238, 220, 30));
		}
		return jTextField8;
	}

  //判断是否为素数
  public static boolean primenumber(long t){
  	long k = 0;
  	k = (long)Math.sqrt((double)t);
  	boolean flag = true;
  	outer:
  		for(int i =2; i <= k; i ++){
  			if((t % 2) == 0){
  				flag = false;
  				break outer;
  			}
  		}
  	return flag;
  }
  
  //求最大公约数
  public long gcd(long a,long b)
  {
    long gcd;
    if(b == 0){
      gcd = a;
    }else{
      gcd = gcd(b, a % b);
    }
    return gcd;    
  }
  
  //加密、解密计算
  public long colum(long y,long n,long key)
  {
    long mul;
    if(key == 1){
      mul = y % n;
    }else{ 
      mul = y * colum(y, n, key - 1) % n;
    }
    return mul;
  }
  
}