package cry;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.io.*;/** * <p>Title: CRY-DES</p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: Fontys</p> * @author Ying & Bill * @version 1.0 */public class Encryption extends JFrame implements ActionListener{  JPanel jPanel1 = new JPanel();//panel  JMenuBar jMenuBar1 = new JMenuBar();//menubar  JMenu jMenu1 = new JMenu();//menubar  JMenuItem jMenuItem1 = new JMenuItem();  JMenuItem jMenuItem2 = new JMenuItem();  JMenuItem jMenuItem3 = new JMenuItem();  JLabel jLabel1 = new JLabel();//label  JMenu jMenu2 = new JMenu();//menu  JTabbedPane jTabbedPane1 = new JTabbedPane();  JPanel pEncry = new JPanel();//encryption panel  JLabel lKey = new JLabel();//key label  JTextField tKey = new JTextField();  JLabel jLabel2 = new JLabel();  JButton bEncry = new JButton();  JLabel Input = new JLabel();  JLabel Output = new JLabel();  JPanel pDecry = new JPanel();  JLabel jLabel3 = new JLabel();  JLabel jLabel4 = new JLabel();  JButton bDecry = new JButton();  JButton bLoad = new JButton();  JScrollPane jScrollPane1 = new JScrollPane();  JTextArea tEncryinput = new JTextArea();  JScrollPane jScrollPane2 = new JScrollPane();  JTextArea tEncryoutput = new JTextArea();  JScrollPane jScrollPane3 = new JScrollPane();  JScrollPane jScrollPane4 = new JScrollPane();  JTextArea tDecryinput = new JTextArea();  JTextArea tDecryoutput = new JTextArea();  private JFileChooser jfc = new JFileChooser();  String text=""; //byte[] s;  public Encryption() {    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  public static void main(String[] args) {    Encryption encryption1 = new Encryption();    encryption1.setSize(600,700);    encryption1.show();  }  private void jbInit() throws Exception {    //setJMenuBar(jMenuBar1);    setTitle("CRY - DES  Author: Ying & Bill");    jScrollPane1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);    jScrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);    jScrollPane1.setAutoscrolls(true);    jScrollPane1.setBounds(new Rectangle(39, 115, 441, 169));    tEncryinput.setText("Here is the input of encryption");    tEncryinput.setLineWrap(true);    jScrollPane2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);    jScrollPane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);    jScrollPane2.setAutoscrolls(true);    jScrollPane2.setBounds(new Rectangle(42, 325, 444, 170));    tEncryoutput.setText("Here is the output of encryption");    tEncryoutput.setLineWrap(true);    tEncryoutput.setBackground(Color.BLACK);    tEncryoutput.setForeground(Color.GREEN);    jScrollPane3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);    jScrollPane3.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);    jScrollPane3.setAutoscrolls(true);    jScrollPane3.setBounds(new Rectangle(16, 82, 492, 192));    jScrollPane4.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);    jScrollPane4.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);    jScrollPane4.setAutoscrolls(true);    jScrollPane4.setBounds(new Rectangle(15, 322, 496, 170));    tDecryinput.setText("Here is the input of decryption");    tDecryinput.setLineWrap(true);    tDecryinput.setBackground(Color.ORANGE);    tDecryinput.setForeground(Color.WHITE);    tDecryoutput.setText("Here is the output of encryption");    tDecryoutput.setLineWrap(true);    jMenuBar1.add(jMenu1);    jMenuBar1.add(jMenu2);    jPanel1.setLayout(null);    jMenu1.setText("File");    jMenuItem1.setText("Open");    jMenuItem2.setText("Save");    jLabel1.setText("CRY - DES");    jLabel1.setBounds(new Rectangle(246, 10, 180, 32));    jMenu2.setText("About Us");    jMenuItem3.setText("Help");    jTabbedPane1.setBounds(new Rectangle(4, 75, 556, 533));    pEncry.setLayout(null);    pEncry.setName("encryption");    lKey.setText("Key");    lKey.setBounds(new Rectangle(15, 45, 47, 29));    tKey.setBounds(new Rectangle(50, 50, 189, 24));    jLabel2.setText("(Please enter a key with  16 bits)");    jLabel2.setBounds(new Rectangle(250, 50, 189, 22));    bEncry.setBounds(new Rectangle(373, 19, 120, 29));    bEncry.setText("Encryption");    Input.setText("Encryption input");    Input.setBounds(new Rectangle(38, 80, 113, 25));    Output.setText("Output text");    Output.setBounds(new Rectangle(38, 297, 92, 27));    pDecry.setLayout(null);    jLabel3.setText("Decryption text");    jLabel3.setBounds(new Rectangle(16, 56, 91, 27));    jLabel4.setText("Decryption output");    jLabel4.setBounds(new Rectangle(15, 293, 104, 26));    bDecry.setBounds(new Rectangle(361, 6, 154, 35));    bDecry.setText("Decryption");    bLoad.setBounds(new Rectangle(183, 7, 138, 34));    bLoad.setText("Load");    jMenuBar1.add(jMenu1);    jMenuBar1.add(jMenu2);    jMenu1.add(jMenuItem1);    jMenu1.add(jMenuItem2);    jMenu2.add(jMenuItem3);    jPanel1.add(jLabel1, null);    jPanel1.add(jTabbedPane1, null);    jPanel1.add(lKey,null);    jPanel1.add(tKey,null);    jPanel1.add(jLabel2,null);    //pEncry.add(tKey, null);    //pEncry.add(lKey, null);    pEncry.add(bEncry, null);    //pEncry.add(jLabel2, null);    pEncry.add(Output, null);    pEncry.add(Input, null);    pEncry.add(jScrollPane1, null);    pEncry.add(jScrollPane2, null);    jScrollPane2.getViewport().add(tEncryoutput, null);    jScrollPane1.getViewport().add(tEncryinput, null);    pDecry.add(bDecry, null);    pDecry.add(bLoad, null);    pDecry.add(jScrollPane3, null);    jScrollPane3.getViewport().add(tDecryinput, null);    pDecry.add(jLabel3, null);    pDecry.add(jLabel4, null);    pDecry.add(jScrollPane4, null);    jScrollPane4.getViewport().add(tDecryoutput, null);    jTabbedPane1.add(pEncry,   "Encryption");    jTabbedPane1.add(pDecry, "Decryption");    getContentPane().add(jPanel1);    jMenuItem1.addActionListener(this);    jMenuItem2.addActionListener(this);    jMenuItem3.addActionListener(this);    bEncry.addActionListener(this);    bDecry.addActionListener(this);    bLoad.addActionListener(this);  }  public void actionPerformed(ActionEvent e)  {   if(e.getSource()==bEncry)   {      String key=tKey.getText();      System.out.println("the length of key is "+key.length());      if(!checkBi(key))      {        JOptionPane.showMessageDialog(null, "please enter binary bits 0 or 1 as key!\n example: 10000101010101010");      }      else if((key.length()!=16))        JOptionPane.showMessageDialog(null, "please enter 16 bits as key!\n example: 10000101010101010");      else      {        //key=getKey(key);        String encryText="";        encryText=encry(tEncryinput.getText(),key);        tEncryoutput.setText("");        tEncryoutput.append(encryText);      }   }   if(e.getSource()==bDecry)   {      String key = tKey.getText();      System.out.println("key length is "+key.length());      if (key.length() != 16)          JOptionPane.showMessageDialog(null, "please enter 16 bits binary as key!\n example: 10000101010101010");      else      {          //key = getKey(key);          String decryText = "";          decryText = decry(tDecryinput.getText(), key);          tDecryoutput.setText("");          tDecryoutput.append(decryText);      }   }   if(e.getSource()==bLoad)   {      tDecryinput.setText("");      tDecryinput.append(tEncryoutput.getText());   }  }   public boolean checkBi(String key)  {    char m=' ';;    for(int i=0;i<key.length();i++)    {      m=key.charAt(i);      if((m!='0')&&(m!='1'))      {        System.out.print("m is "+m+" which is not binary"+i);        return false;      }    }    System.out.println("no problem for key");    return true;  }  public String getKey(String character)  {    String key="";    String sub1="";    String sub2="";    int c1=character.charAt(0);    int c2=character.charAt(1);    System.out.println("&&&&&&&&&&&&&&&&&c1 is "+c1);    System.out.println("&&&&&&&&&&&&&&&&&c2 is "+c2);    sub1=convertDToB(c1,8);    System.out.println("sub1 is "+sub1);    sub2=convertDToB(c2,8);    key=sub1+sub2;    System.out.println("&&&&&&&&&&&&&&&&&&&&&&&key is "+key);    return key;  }  public String encry(String text, String key)  {    String subText="";    String subKey1="";    String subKey2="";    String result="";    subKey1=calSubKey(key)[0];    subKey2=calSubKey(key)[1];    System.out.println("in encry subkey1 is "+subKey1);    System.out.println("in encry subkey2 is "+subKey2);    //for the odd numbers of length in text    if((text.length()%2)==1)      text+=" ";    for(int i=0; i<text.length();i++)    {      subText=text.substring(i,i+2);      result+=subcry(subText,subKey1,subKey2);      //i will be add i again in the for loop      i++;    }    return result;  }  public String decry(String text, String key)  {    String subText="";    String subKey1="";    String subKey2="";    String result="";    subKey1=calSubKey(key)[1];    subKey2=calSubKey(key)[0];     //for the odd numbers of length in text    if((text.length()%2)==1)      text+=" ";    for(int i=0; i<text.length();i++)    {      subText=text.substring(i,i+2);      result+=subcry(subText,subKey1,subKey2);      i++;    }    return result;  }  public String subcry(String subText, String subkey1,String subkey2)  {    String subEncry="";    String textInBi=textToBi(subText);    String passIP="";    String g1="";    String g2="";    String passF="";    String passCombine1="";    String passCombine2="";    String beforeIP_1="";    String passIP_1="";    System.out.println("**************************subkey1 is "+subkey1);    System.out.println("**************************subkey2 is "+subkey2);    int[] IP={10,6,14,2,               8,16,12,4,               1,13,7,9,               5,11,3,15};    int[] IP_1={9,4,15,8,              13,2,11,5,              12,1,14,7,