java ssl socket example

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ssl socket connection with multi threading application. 

Server



  2. package Test2;

  4. import java.awt.BorderLayout;
  5. import java.awt.event.ActionEvent;
  6. import java.awt.event.ActionListener;
  7. import java.io.IOException;
  8. import java.io.ObjectInputStream;
  9. import java.io.ObjectOutputStream;
  10. import java.net.InetAddress;
  11. import java.security.cert.Certificate;
  12. import java.security.cert.X509Certificate;
  13. import java.util.ArrayList;

  15. import javax.net.ssl.SSLServerSocket;
  16. import javax.net.ssl.SSLServerSocketFactory;
  17. import javax.net.ssl.SSLSession;
  18. import javax.net.ssl.SSLSocket;
  19. import javax.swing.JFrame;
  20. import javax.swing.JOptionPane;
  21. import javax.swing.JScrollPane;
  22. import javax.swing.JTextArea;
  23. import javax.swing.JTextField;

  25. public class Server {
  26. public static ArrayList<String> list_user = new ArrayList<String>();
  27. public static ArrayList<String> list_verify = new ArrayList<String>();
  28. public static int port = 8005;
  29. public static void main(String[] args) {
  30. list_verify.add("101");
  31. list_verify.add("102");
  32. list_verify.add("103");
  33. list_verify.add("104");
  34. list_verify.add("105");
  35. try {
  36. SSLServerSocketFactory factory=(SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
  37.        SSLServerSocket sslserversocket = (SSLServerSocket) factory.createServerSocket(port, 0, InetAddress.getLocalHost());
  38.        System.out.println("Server running in :" + InetAddress.getLocalHost() + ":" + port);
  39.        String[] suites = sslserversocket.getSupportedCipherSuites();
  40.        /*for(String s:suites){
  41.         System.out.println(s);
  42.        }*/
  43.        sslserversocket.setEnabledCipherSuites(suites);
  44.        while (true) {
  45.        SSLSocket socket=(SSLSocket) sslserversocket.accept();
  46. /*       
  47.        SSLSession session = ((SSLSocket) socket).getSession();
  48.        Certificate[] cchain2 = session.getLocalCertificates();*/
  49.       
  50.       
  51. Runnable accept = new Runnable() {
  52. @Override
  53. public void run() {
  54. JFrame frame = new JFrame("Server");
  55. String currentUser="";
  56. try {
  57. ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
  58. String username = (String) ois.readObject();
  59.    ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());

  61. if (list_verify.contains(username)) {
  62. if (!list_user.contains(username)) {
  63. list_user.add(username);
  64. currentUser=username;
  65. oos.writeObject("1");
  66. System.out.println("connected to : " + username);
  67. //JFrame frame = new JFrame("Server");
  68. frame.addWindowListener(new java.awt.event.WindowAdapter() {
  69.    @Override
  70.    public void windowClosing(java.awt.event.WindowEvent windowEvent) {
  71.     //frame.dispose();
  72.     try {
  73. oos.close();
  74. ois.close();
  75. } catch (IOException e) {

  77. e.printStackTrace();
  78. }
  79.    
  80.    }
  81. });

  83. frame.setVisible(true);
  84. JTextField userText = new JTextField();
  85. userText.setEditable(false);
  86. userText.addActionListener(new ActionListener() {
  87. public void actionPerformed(ActionEvent event) {
  88. sendMessage(oos, event.getActionCommand());
  89. userText.setText("");
  90. }
  91. });
  92. ;

  94. frame.add(userText, BorderLayout.NORTH);
  95. JTextArea chatWindow = new JTextArea();
  96. chatWindow.setEditable(false);
  97. frame.add(new JScrollPane(chatWindow));
  98. frame.setSize(300, 150);
  99. chatWindow.append("connected to : " + username);
  100. userText.setEditable(true);

  102. do {
  103. try {
  104. username = (String) ois.readObject();
  105. chatWindow.append("\n " + username);
  106. } catch (ClassNotFoundException classNotFoundException) {
  107. System.out.println("close");
  108. chatWindow.append("\n Dont know the Object type ");
  109. chatWindow.append("\n connection close.. ");
  110. }

  112. } while (!username.equals("END"));

  114. } else {
  115. oos.writeObject("2");
  116. }
  117. } else {
  118. oos.writeObject("0");
  119. }

  121. } catch (IOException e) {
  122. System.out.println("client disconnected ");
  123. frame.dispose();
  124. list_user.remove(currentUser);
  125. //Thread.currentThread().interrupt();
  126. // chatWindow.append("Diss");
  127. // userText.setEditable(false);
  128. // e.printStackTrace();
  129. } catch (ClassNotFoundException e) {
  130. e.printStackTrace();

  132. }

  134. }};
  135. new Thread(accept).start();
  136.        }
  137. } catch (IOException e) {
  138. JOptionPane.showMessageDialog(null, "Server already running in the same port");
  139. System.out.println("Ip and port Already bind");
  140. }
  141.      

  143. }
  144. public static void sendMessage(ObjectOutputStream oos, String message) {
  145. try {
  146. oos.writeObject(message);
  147. } catch (IOException e) {
  148. e.printStackTrace();
  149. }
  150. }

  152. }

Client



  2. package Test2;

  4. import java.awt.BorderLayout;
  5. import java.awt.event.ActionEvent;
  6. import java.awt.event.ActionListener;
  7. import java.io.IOException;
  8. import java.io.ObjectInputStream;
  9. import java.io.ObjectOutputStream;
  10. import java.net.UnknownHostException;

  12. import javax.net.ssl.HandshakeCompletedEvent;
  13. import javax.net.ssl.HandshakeCompletedListener;
  14. import javax.net.ssl.SSLSocket;
  15. import javax.net.ssl.SSLSocketFactory;
  16. import javax.swing.JFrame;
  17. import javax.swing.JOptionPane;
  18. import javax.swing.JScrollPane;
  19. import javax.swing.JTextArea;
  20. import javax.swing.JTextField;

  22. public class Client {

  24. public static void main(String[] args) {
  25. String host = "localhost";
  26. int port = 8005;
  27. String username = JOptionPane.showInputDialog(null, "IP: " + host + ":" + port);
  28. JFrame frame = new JFrame("Client");
  29. try {

  31. SSLSocketFactory factory = (SSLSocketFactory) SSLSocketFactory.getDefault();
  32. SSLSocket socket = (SSLSocket) factory.createSocket(host, port);

  34. String[] suites = socket.getSupportedCipherSuites();
  35. socket.setEnabledCipherSuites(suites);

  37. socket.addHandshakeCompletedListener(new MyHandshakeListener());
  38. socket.startHandshake();

  40. System.out.println("Just connected to " + socket.getRemoteSocketAddress());
  41. ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
  42. oos.writeObject(username);

  44. ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
  45. String response = (String) ois.readObject();
  46. //JFrame frame = new JFrame("Client");
  47. frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  48. frame.setVisible(true);
  49. JTextField userText = new JTextField();
  50. userText.setEditable(false);
  51. userText.addActionListener(new ActionListener() {
  52. public void actionPerformed(ActionEvent event) {
  53. sendMessage(oos, event.getActionCommand());
  54. userText.setText("");
  55. }
  56. });
  57. ;

  59. frame.add(userText, BorderLayout.NORTH);
  60. JTextArea chatWindow = new JTextArea();
  61. chatWindow.setEditable(false);
  62. frame.add(new JScrollPane(chatWindow));
  63. frame.setSize(300, 150);
  64. if (response.equalsIgnoreCase("1")) {
  65. chatWindow.append("connected......");
  66. userText.setEditable(true);
  67. do {
  68. try {
  69. response = (String) ois.readObject();
  70. chatWindow.append("\n " + response);
  71. } catch (ClassNotFoundException classNotFoundException) {
  72. chatWindow.append("\n Dont know the Object type ");
  73. chatWindow.append("\n connection close.. ");
  74. }

  76. } while (!response.equals(" END"));
  77. }
  78. if (response.equalsIgnoreCase("0")) {
  79. chatWindow.append("\n refused , not authorised....");
  80. }
  81. if (response.equalsIgnoreCase("2")) {
  82. frame.dispose();
  83. JOptionPane.showMessageDialog(null, "already connected");
  84. }

  86. } catch (UnknownHostException e) {
  87. // TODO Auto-generated catch block
  88. e.printStackTrace();
  89. } catch (IOException e) {
  90. frame.dispose();
  91. }
  92.  catch (ClassNotFoundException e) {
  93. // TODO Auto-generated catch block
  94. e.printStackTrace();
  95. }
  96. }
  97. public static void sendMessage(ObjectOutputStream oos, String message) {
  98. try {
  99. oos.writeObject(message);
  100. } catch (IOException e) {
  101. // TODO Auto-generated catch block
  102. e.printStackTrace();
  103. }
  104. }

  106. }
  107. class MyHandshakeListener implements HandshakeCompletedListener {
  108.   public void handshakeCompleted(HandshakeCompletedEvent e) {
  109.     System.out.println("Handshake succesful!");
  110.     System.out.println("Using cipher suite: " + e.getCipherSuite());
  111.   }
  112. }
  113.    

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