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How to encrypt a message using Blowfish encryption Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
Encrypt a Message using Blowfish encryption 06-Aug-04
Category
Security
Language
JBuilder All Versions
Views
361
User Rating
7
# Votes
1
Replies
0
Publisher:
Darley, F. Joe
Reference URL:
			
1 2 package samplecode; 3 4 import java.awt.*; 5 import java.awt.event.*; 6 import javax.swing.*; 7 import javax.crypto.*; 8 9 10 11 /** 12 * <p>Title: Font Names </p> 13 * <p>Description: This program shows how Encrypt a message</p> 14 * <p>Company: Developer's super Page.com</p> 15 */ 16 17 18 public class SampleFrame extends JFrame { 19 JPanel contentPane; 20 BorderLayout borderLayout1 = new BorderLayout(); 21 JPanel jpnlMain = new JPanel(); 22 JButton jButton1 = new JButton(); 23 DefaultListModel model = new DefaultListModel(); 24 JLabel jLabel1 = new JLabel(); 25 JTextField jTextField1 = new JTextField(); 26 JTextField jTextField2 = new JTextField(); 27 //Construct the frame 28 public SampleFrame() { 29 enableEvents(AWTEvent.WINDOW_EVENT_MASK); 30 try { 31 jbInit(); 32 } 33 catch(Exception e) { 34 e.printStackTrace(); 35 } 36 } 37 38 //Component initialization 39 private void jbInit() throws Exception { 40 contentPane = (JPanel) this.getContentPane(); 41 contentPane.setLayout(borderLayout1); 42 this.setSize(new Dimension(400, 300)); 43 this.setTitle("Encrypt Message"); 44 this.addHierarchyBoundsListener(new 45 SampleFrame_this_hierarchyBoundsAdapter(this)); 46 jpnlMain.setLayout(null); 47 contentPane.setMinimumSize(new Dimension(300, 300)); 48 contentPane.setPreferredSize(new Dimension(300, 256)); 49 jpnlMain.setDebugGraphicsOptions(0); 50 jpnlMain.setMinimumSize(new Dimension(400, 256)); 51 jpnlMain.setPreferredSize(new Dimension(400, 256)); 52 jButton1.setBounds(new Rectangle(78, 63, 88, 36)); 53 jButton1.setText("Encrypt"); 54 jButton1.addActionListener(new SampleFrame_jButton1_actionAdapter(this)); 55 56 jTextField1.setText("jTextField1"); 57 jTextField1.setBounds(new Rectangle(40, 25, 201, 26)); 58 jTextField2.setBounds(new Rectangle(42, 113, 201, 26)); 59 jTextField2.setText("jTextField1"); 60 contentPane.add(jpnlMain, BorderLayout.CENTER); 61 jpnlMain.add(jTextField1, null); 62 jpnlMain.add(jTextField2, null); 63 jpnlMain.add(jButton1, null); 64 65 66 } 67 68 //Overridden so we can exit when window is closed 69 protected void processWindowEvent(WindowEvent e) { 70 super.processWindowEvent(e); 71 if (e.getID() == WindowEvent.WINDOW_CLOSING) { 72 System.exit(0); 73 } 74 } 75 76 77 void jButton1_actionPerformed(ActionEvent e) { 78 //this function encrypt a message 79 try { 80 Cipher ecipher = Cipher.getInstance("Blowfish"); 81 82 //Generates a Key 83 SecretKey key = KeyGenerator.getInstance("Blowfish").generateKey(); 84 85 ecipher.init(Cipher.ENCRYPT_MODE, key); 86 // Encode the string into bytes using utf-8 87 byte[] utf8 = jTextField1.getText().getBytes("UTF8"); 88 89 byte[] enc = ecipher.doFinal(utf8); 90 91 // Encode bytes to base64 to get a string 92 jTextField2.setText( new sun.misc.BASE64Encoder().encode(enc)); 93 } catch (Exception e1) { 94 } 95 96 } 97 98 } 99 100 class SampleFrame_this_hierarchyBoundsAdapter extends 101 java.awt.event.HierarchyBoundsAdapter { 102 SampleFrame adaptee; 103 104 SampleFrame_this_hierarchyBoundsAdapter(SampleFrame adaptee) { 105 this.adaptee = adaptee; 106 } 107 108 } 109 110 class SampleFrame_jButton1_actionAdapter implements java.awt.event.ActionListener { 111 SampleFrame adaptee; 112 113 SampleFrame_jButton1_actionAdapter(SampleFrame adaptee) { 114 this.adaptee = adaptee; 115 } 116 public void actionPerformed(ActionEvent e) { 117 adaptee.jButton1_actionPerformed(e); 118 } 119 } 120
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