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edited May 24, 2016 at 16:05

 import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import javax.net.ssl.*; public class ChatClient implements Runnable {  private SSLSocket socket = null; private Thread thread = null; private DataInputStream console = null; private DataOutputStream streamOut = null; private ChatClientThread client = null; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatClient(String serverName, int serverPort) {  System.out.println("Establishing connection to server..."); try { SSLSocketFactory factory = null; SSLContext ctx = SSLContext.getInstance("TLS"); KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"KeyManagerFactory.getDefaultAlgorithm());   KeyStore ks= KeyStore.getInstance("JKS"); ks.load(new FileInputStream("clientkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("serverkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); factory = ctx.getSocketFactory(); socket = (SSLSocket)factory.createSocket(serverName, serverPort); socket.setEnabledCipherSuites(socket.getSupportedCipherSuites()); System.out.println("CIPHER : " + socket.getSession().getCipherSuite()); System.out.println("Connected to server: " + socketenabledCipherSuites); start(); }   catch(UnknownHostException uhe) {  // Host unkwnown System.out.println("Error establishing connection - host unknown: " + uhe.getMessage());  } catch(IOException ioexception) {  // Other error establishing connection System.out.println("Error establishing connection - unexpected exception: " + ioexception.getMessage());  } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } }     public void run() {  {   while (thread != null) {  {   try   { {   // Sends message from console to server   streamOut.writeUTF(console.readLine());   streamOut.flush();   }     catch(IOException ioexception) {  {   System.out.println("Error sending string to server: " + ioexception.getMessage());   stop();   }   } }     public void handle(String msg) {  // Receives message from server if (msg.equals(".quit")) {  // Leaving, quit command System.out.println("Exiting...Please press RETURN to exit ..."); stop(); } else // else, writes message received from server to console System.out.println(msg); }   // Inits new client thread public void start() throws IOException {  console = new DataInputStream(System.in); streamOut = new DataOutputStream(socket.getOutputStream()); if (thread == null) {  client = new ChatClientThread(this, socket); thread = new Thread(this);  thread.start(); } }   // Stops client thread public void stop() {  if (thread != null) {  thread.stop();  thread = null; } try {  if (console != null) console.close(); if (streamOut != null) streamOut.close(); if (socket != null) socket.close(); }   catch(IOException ioe) {  System.out.println("Error closing thread..."); }   client.close();    client.stop();   }     public static void main(String args[]) {  ChatClient client = null; if (args.length != 2) // Displays correct usage syntax on stdout System.out.println("Usage: java ChatClient host port"); else // Calls new client client = new ChatClient(args[0], Integer.parseInt(args[1])); }   } class ChatClientThread extends Thread {  private SSLSocket socket = null; private ChatClient client = null; private DataInputStream streamIn = null; public ChatClientThread(ChatClient _client, SSLSocket _socket) {  client = _client; socket = _socket; open();  start(); }   public void open() {  try {  streamIn = new DataInputStream(socket.getInputStream()); } catch(IOException ioe) {  System.out.println("Error getting input stream: " + ioe); client.stop(); } }   public void close() {  try {  if (streamIn != null) streamIn.close(); }   catch(IOException ioe) {  System.out.println("Error closing input stream: " + ioe); } }   public void run() {  while (true) { try   {    client.handle(streamIn.readUTF());   }   catch(IOException ioe)   {    System.out.println("Listening error: " + ioe.getMessage());   client.stop();   } } } }

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable {  private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port)   { try   {   // Binds to port and starts server   System.out.println("Binding to port " + port);   SSLContext ctx = SSLContext.getInstance("TLS");;   KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"KeyManagerFactory.getDefaultAlgorithm());   KeyStore ks = KeyStore.getInstance("JKS");   ks.load(new FileInputStream("serverkeystore"), passphrase);   kmf.init(ks, passphrase);   KeyStore serverKey = KeyStore.getInstance("JKS");   serverKey.load(new FileInputStream("clientkeystore"),passphrase);   TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509");   trustManager.init(serverKey);   ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null);   SSLServerSocketFactory ssf = ctx.getServerSocketFactory();   server_socket = (SSLServerSocket) ssf.createServerSocket(port);   server_socket.setEnabledCipherSuites(server_socket.getSupportedCipherSuites()enabledCipherSuites);   server_socket.setNeedClientAuth(true);   System.out.println("Server started: " + server_socket);   start();   }   catch(IOException ioexception)   {   // Error binding to port   System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage());   } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace();  }  }  }    public void run()   {    while (thread != null)   {    try   {    // Adds new thread for new client   System.out.println("Waiting for a client ...");    addThread((SSLSocket)server_socket.accept());   }   catch(IOException ioexception)   {   System.out.println("Accept error: " + ioexception); stop(); } } } }  public void start()   {    if (thread == null)   {    // Starts new thread for client   thread = new Thread(this);    thread.start(); } } }     public void stop()   {    if (thread != null)   {   // Stops running thread for client   thread.stop();    thread = null; } }   }  private int findClient(int ID)  private { // Returns client from id for (int findClienti = 0; i < clientCount; i++) if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) {  int leaving_id = findClient(ID); // ReturnsClient clientexits  from id clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++)   if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) { int leaving_id = findClient(ID); // Client exits clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id)   clients[i].send("Client " +ID + " exits..");   remove(ID); } else // Brodcast message for every other client online for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input);  }    else  public synchronized void remove(int ID)  // Brodcast message for {every other client online   for (int posi = findClient(ID0; i < clientCount; i++);    clients[i].send(ID + if": (pos" >=+ 0input); }  public synchronized void remove(int ID)  { { int pos = findClient(ID);  if //(pos Removes>= thread0)  for exiting client { // Removes thread for exiting client  ChatServerThread toTerminate = clients[pos];  ChatServerThread toTerminate = clients[pos];  System.out.println("Removing client thread " + ID + " at " + pos);   if (pos < clientCount-1)   for (int i = pos+1; i < clientCount; i++)   clients[i-1] = clients[i];   clientCount--;     try   {    toTerminate.close();    }     catch(IOException ioe)   {    System.out.println("Error closing thread: " + ioe); } toTerminate.stop();  }  toTerminate.stop();  } }     private void addThread(SSLSocket socket)   {    if (clientCount < clients.length)   {    // Adds thread for new accepted client   System.out.println("Client accepted: " + socket);   clients[clientCount] = new ChatServerThread(this, socket);     try   {    clients[clientCount].open();    clients[clientCount].start();    clientCount++; } catch(IOException ioe) { System.out.println("Error opening thread: " + ioe); } } elsecatch(IOException ioe)   {  System.out.println("Client"Error refused:opening maximumthread: " + clients.lengthioe);  + " reached."); } }   else   System.out.println("Client refused: maximum " + clients.length + " reached."); }  public static void main(String args[]) {    ChatServer server = null; if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); }  if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread {  private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null;   public ChatServerThread(ChatServer _server, SSLSocket _socket) {  super(); server = _server; socket = _socket; ID = socket.getPort(); }   // Sends message to client public void send(String msg) {  try {  streamOut.writeUTF(msg); streamOut.flush(); }   catch(IOException ioexception) {  System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } }   // Gets id for client public int getID() {  return ID; }   // Runs thread public void run() {  System.out.println("Server Thread " + ID + " running.");   while (true) {  try {  server.handle(ID, streamIn.readUTF()); }   catch(IOException ioe) {  System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } }    // Opens thread public void open() throws IOException {  streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); }   // Closes thread public void close() throws IOException {  if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); }   }

Here is the server's stack trace:

Here is the server's stack trace: /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/bin/java -Djavax.net.debug=all -Didea.launcher.port=7536 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 15.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath "/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/tools.jar:/Users/joaogoncalves/Dropbox/STI/out/production/STI Assignment 3:/Applications/IntelliJ IDEA 15.app/Contents/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain ChatServer 5000 Binding to port 5000 adding as trusted cert: Subject: CN=Joao Goncalves, OU=DEQ, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c36 Valid from Mon May 23 23:43:42 WEST 2016 until Tue May 23 23:43:42 WEST 2017 adding as trusted cert: Subject: CN=www.uc.pt, OU=DEM, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c35 Valid from Mon May 23 23:42:54 WEST 2016 until Tue May 23 23:42:54 WEST 2017 adding as trusted cert: Subject: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xdb931da4e1abec22 Valid from Mon May 23 23:42:03 WEST 2016 until Tue May 23 23:42:03 WEST 2017   trigger seeding of SecureRandom done seeding SecureRandom Server started: [SSL: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=5000]] Waiting for a client ... Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Client accepted: 7dfb3d0[SSL_NULL_WITH_NULL_NULL74ce57fc[SSL_NULL_WITH_NULL_NULL: Socket[addr=/127.0.0.1,port=54301port=57519,localport=5000]] Waiting for a client ... Server Thread 5430157519 running. Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 IgnoringNo unsupportedavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 IgnoringNo unsupportedavailable cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.1 [Raw read]: length = 5 0000: 16 03 03 0100 2D52 ....-R [Raw read]: length = 30182 0000: 01 00 0100 294E 03 03 57 44 747B 863B E3B8 2B1E D577 C988 D8AF 414E ...)N..WDtWD.;.+.w..AN 0010: ADC7 92CA 8073 ACCE 28AC 0738 8862 145D 0918 A0BD B59A E016 E67E 9B25 1886 E225 ....(...s..8b].....%.% 0020: 5D36 F21C 5AEF 0EF5 14B6 1FFF 00 00  A4 C0 24 C0 2802 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F01 00 39 00 38 C0 23 C0  27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 6../...-.1...=...#. 00800030: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00  ................ 00B0: 19 00 3B C018 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 2203 0006 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 05 1703 0005 01 0004 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00  0A 00 18 00 0B 00 0C 0004 ................ 00F00040: 1901 0003 0D03 0003 0E01 0002 0F03 0002 1001 0002 1102 0001 0201 00FF 1201 00 ................ 01000050: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00  ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. Thread-1, READ: TLSv1.2 Handshake, length = 30182 *** ClientHello, TLSv1.2 RandomCookie: GMT: 14641038141464105787 bytes = { 227184, 4330, 213119, 201136, 216175, 6578, 173199, 146202, 128115, 172206, 40172, 756, 13698, 2093, 924, 160189, 181154, 22422, 230126, 15537, 24134, 22637, 9354, 24228, 90239, 14245, 20182, 31255 } Session ID: {} Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV, TLS_DH_anon_WITH_AES_256_GCM_SHA384, TLS_DH_anon_WITH_AES_128_GCM_SHA256, TLS_DH_anon_WITH_AES_256_CBC_SHA256, TLS_ECDH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA256, TLS_ECDH_anon_WITH_AES_128_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA, TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, SSL_DH_anon_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_DHE_RSA_WITH_DES_CBC_SHA, SSL_DHE_DSS_WITH_DES_CBC_SHA, SSL_DH_anon_WITH_DES_CBC_SHA, SSL_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA, TLS_RSA_WITH_NULL_SHA256, TLS_ECDHE_ECDSA_WITH_NULL_SHA, TLS_ECDHE_RSA_WITH_NULL_SHA, SSL_RSA_WITH_NULL_SHA, TLS_ECDH_ECDSA_WITH_NULL_SHA, TLS_ECDH_RSA_WITH_NULL_SHA, TLS_ECDH_anon_WITH_NULL_SHA, SSL_RSA_WITH_NULL_MD5, TLS_KRB5_WITH_3DES_EDE_CBC_SHA, TLS_KRB5_WITH_3DES_EDE_CBC_MD5, TLS_KRB5_WITH_DES_CBC_SHA, TLS_KRB5_WITH_DES_CBC_MD5, TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5][TLS_RSA_WITH_AES_256_CBC_SHA256] Compression Methods: { 0 } Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1} Extension ec_point_formats, formats: [uncompressed] Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA Extension renegotiation_info, renegotiated_connection: <empty> *** [read] MD5 and SHA1 hashes: len = 30182 0000: 01 00 0100 294E 03 03 57 44 747B 863B E3B8 2B1E D577 C988 D8AF 414E ...)N..WDtWD.;.+.w..AN 0010: ADC7 92CA 8073 ACCE 28AC 0738 8862 145D 0918 A0BD B59A E016 E67E 9B25 1886 E225 ....(...s..8b].....%.% 0020: 5D36 F21C 5AEF 0EF5 14B6 1FFF 00 00 A4 C0 24 C0 2802 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F01 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 6../...-.1...=...#. 00800030: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00  1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C018 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 2203 0006 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 05 1703 0005 01 0004 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00  0A 00 18 00 0B 00 0C 0004 ................ 00F00040: 1901 0003 0D03 0003 0E01 0002 0F03 0002 1001 0002 1102 0001 0201 00FF 1201 00 ................ 01000050: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02  01 02 02 01 01 ............. %% Initialized: [Session-1, SSL_NULL_WITH_NULL_NULL] %% Invalidated: [Session-1, SSL_NULL_WITH_NULL_NULL] Thread-1, SEND TLSv1.2 ALERT: fatal, description = handshake_failure Thread-1, WRITE: TLSv1.2 Alert, length = 2 [Raw write]: length = 7 0000: 15 03 03 00 02 02 28 ......( Thread-1, called closeSocket() Thread-1, handling exception: javax.net.ssl.SSLHandshakeException: no cipher suites in common 5430157519 ERROR reading: no cipher suites in common Removing client thread 5430157519 at 0 Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Process finished with exit code 130

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import javax.net.ssl.*; public class ChatClient implements Runnable {  private SSLSocket socket = null; private Thread thread = null; private DataInputStream console = null; private DataOutputStream streamOut = null; private ChatClientThread client = null; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatClient(String serverName, int serverPort) {  System.out.println("Establishing connection to server..."); try { SSLSocketFactory factory = null; SSLContext ctx = SSLContext.getInstance("TLS"); KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); KeyStore ks= KeyStore.getInstance("JKS"); ks.load(new FileInputStream("clientkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("serverkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); factory = ctx.getSocketFactory(); socket = (SSLSocket)factory.createSocket(serverName, serverPort); socket.setEnabledCipherSuites(socket.getSupportedCipherSuites()); System.out.println("CIPHER : " + socket.getSession().getCipherSuite()); System.out.println("Connected to server: " + socket); start(); }   catch(UnknownHostException uhe) {  // Host unkwnown System.out.println("Error establishing connection - host unknown: " + uhe.getMessage());  } catch(IOException ioexception) {  // Other error establishing connection System.out.println("Error establishing connection - unexpected exception: " + ioexception.getMessage());  } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } }   public void run() {  while (thread != null) {  try   { // Sends message from console to server streamOut.writeUTF(console.readLine()); streamOut.flush(); }   catch(IOException ioexception) {  System.out.println("Error sending string to server: " + ioexception.getMessage()); stop(); } } }     public void handle(String msg) {  // Receives message from server if (msg.equals(".quit")) {  // Leaving, quit command System.out.println("Exiting...Please press RETURN to exit ..."); stop(); } else // else, writes message received from server to console System.out.println(msg); }   // Inits new client thread public void start() throws IOException {  console = new DataInputStream(System.in); streamOut = new DataOutputStream(socket.getOutputStream()); if (thread == null) {  client = new ChatClientThread(this, socket); thread = new Thread(this);  thread.start(); } }   // Stops client thread public void stop() {  if (thread != null) {  thread.stop();  thread = null; } try {  if (console != null) console.close(); if (streamOut != null) streamOut.close(); if (socket != null) socket.close(); }   catch(IOException ioe) {  System.out.println("Error closing thread..."); }   client.close();    client.stop();   }     public static void main(String args[]) {  ChatClient client = null; if (args.length != 2) // Displays correct usage syntax on stdout System.out.println("Usage: java ChatClient host port"); else // Calls new client client = new ChatClient(args[0], Integer.parseInt(args[1])); }   } class ChatClientThread extends Thread {  private SSLSocket socket = null; private ChatClient client = null; private DataInputStream streamIn = null; public ChatClientThread(ChatClient _client, SSLSocket _socket) {  client = _client; socket = _socket; open();  start(); }   public void open() {  try {  streamIn = new DataInputStream(socket.getInputStream()); } catch(IOException ioe) {  System.out.println("Error getting input stream: " + ioe); client.stop(); } }   public void close() {  try {  if (streamIn != null) streamIn.close(); }   catch(IOException ioe) {  System.out.println("Error closing input stream: " + ioe); } }   public void run() {  while (true) { try   {    client.handle(streamIn.readUTF());   }   catch(IOException ioe)   {    System.out.println("Listening error: " + ioe.getMessage());   client.stop();   } } } }

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable {  private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port)   { try   {   // Binds to port and starts server   System.out.println("Binding to port " + port);   SSLContext ctx = SSLContext.getInstance("TLS");;   KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");   KeyStore ks = KeyStore.getInstance("JKS");   ks.load(new FileInputStream("serverkeystore"), passphrase);   kmf.init(ks, passphrase);   KeyStore serverKey = KeyStore.getInstance("JKS");   serverKey.load(new FileInputStream("clientkeystore"),passphrase);   TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509");   trustManager.init(serverKey);   ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null);   SSLServerSocketFactory ssf = ctx.getServerSocketFactory();   server_socket = (SSLServerSocket) ssf.createServerSocket(port);   server_socket.setEnabledCipherSuites(server_socket.getSupportedCipherSuites());   server_socket.setNeedClientAuth(true);   System.out.println("Server started: " + server_socket);   start();   }   catch(IOException ioexception)   {   // Error binding to port   System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage());   } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace();  }  }   public void run()   {    while (thread != null)   {    try   {    // Adds new thread for new client   System.out.println("Waiting for a client ...");    addThread((SSLSocket)server_socket.accept());   }   catch(IOException ioexception)   {   System.out.println("Accept error: " + ioexception); stop(); } } } public void start()   {    if (thread == null)   {    // Starts new thread for client   thread = new Thread(this);    thread.start(); } }   public void stop()   {    if (thread != null)   {   // Stops running thread for client   thread.stop();    thread = null; } } private int findClient(int ID) { // Returns client from id for (int i = 0; i < clientCount; i++)   if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) { int leaving_id = findClient(ID); // Client exits clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id)   clients[i].send("Client " +ID + " exits..");   remove(ID); } else // Brodcast message for every other client online for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input);  }    public synchronized void remove(int ID)  { int pos = findClient(ID);    if (pos >= 0) { // Removes thread for exiting client ChatServerThread toTerminate = clients[pos];  System.out.println("Removing client thread " + ID + " at " + pos);   if (pos < clientCount-1)   for (int i = pos+1; i < clientCount; i++)   clients[i-1] = clients[i];   clientCount--;     try   {    toTerminate.close();    }     catch(IOException ioe)   {    System.out.println("Error closing thread: " + ioe); } toTerminate.stop();  } }   private void addThread(SSLSocket socket)   {    if (clientCount < clients.length)   {    // Adds thread for new accepted client   System.out.println("Client accepted: " + socket);   clients[clientCount] = new ChatServerThread(this, socket);     try   {    clients[clientCount].open();    clients[clientCount].start();    clientCount++; } catch(IOException ioe) { System.out.println("Error opening thread: " + ioe); } } else System.out.println("Client refused: maximum " + clients.length + " reached."); } public static void main(String args[]) {    ChatServer server = null; if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread {  private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null;   public ChatServerThread(ChatServer _server, SSLSocket _socket) {  super(); server = _server; socket = _socket; ID = socket.getPort(); }   // Sends message to client public void send(String msg) {  try {  streamOut.writeUTF(msg); streamOut.flush(); }   catch(IOException ioexception) {  System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } }   // Gets id for client public int getID() {  return ID; }   // Runs thread public void run() {  System.out.println("Server Thread " + ID + " running.");   while (true) {  try {  server.handle(ID, streamIn.readUTF()); }   catch(IOException ioe) {  System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } } // Opens thread public void open() throws IOException {  streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); }   // Closes thread public void close() throws IOException {  if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); }   }

Here is the server's stack trace:

Binding to port 5000 adding as trusted cert: Subject: CN=Joao Goncalves, OU=DEQ, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c36 Valid from Mon May 23 23:43:42 WEST 2016 until Tue May 23 23:43:42 WEST 2017 adding as trusted cert: Subject: CN=www.uc.pt, OU=DEM, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c35 Valid from Mon May 23 23:42:54 WEST 2016 until Tue May 23 23:42:54 WEST 2017 adding as trusted cert: Subject: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xdb931da4e1abec22 Valid from Mon May 23 23:42:03 WEST 2016 until Tue May 23 23:42:03 WEST 2017 trigger seeding of SecureRandom done seeding SecureRandom Server started: [SSL: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=5000]] Waiting for a client ... Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Client accepted: 7dfb3d0[SSL_NULL_WITH_NULL_NULL: Socket[addr=/127.0.0.1,port=54301,localport=5000]] Waiting for a client ... Server Thread 54301 running. Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.1 [Raw read]: length = 5 0000: 16 03 03 01 2D ....- [Raw read]: length = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00  A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0  27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00  ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00  17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00  0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00  ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. Thread-1, READ: TLSv1.2 Handshake, length = 301 *** ClientHello, TLSv1.2 RandomCookie: GMT: 1464103814 bytes = { 227, 43, 213, 201, 216, 65, 173, 146, 128, 172, 40, 7, 136, 20, 9, 160, 181, 224, 230, 155, 24, 226, 93, 242, 90, 14, 20, 31 } Session ID: {} Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV, TLS_DH_anon_WITH_AES_256_GCM_SHA384, TLS_DH_anon_WITH_AES_128_GCM_SHA256, TLS_DH_anon_WITH_AES_256_CBC_SHA256, TLS_ECDH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA256, TLS_ECDH_anon_WITH_AES_128_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA, TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, SSL_DH_anon_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_DHE_RSA_WITH_DES_CBC_SHA, SSL_DHE_DSS_WITH_DES_CBC_SHA, SSL_DH_anon_WITH_DES_CBC_SHA, SSL_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA, TLS_RSA_WITH_NULL_SHA256, TLS_ECDHE_ECDSA_WITH_NULL_SHA, TLS_ECDHE_RSA_WITH_NULL_SHA, SSL_RSA_WITH_NULL_SHA, TLS_ECDH_ECDSA_WITH_NULL_SHA, TLS_ECDH_RSA_WITH_NULL_SHA, TLS_ECDH_anon_WITH_NULL_SHA, SSL_RSA_WITH_NULL_MD5, TLS_KRB5_WITH_3DES_EDE_CBC_SHA, TLS_KRB5_WITH_3DES_EDE_CBC_MD5, TLS_KRB5_WITH_DES_CBC_SHA, TLS_KRB5_WITH_DES_CBC_MD5, TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5] Compression Methods: { 0 } Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1} Extension ec_point_formats, formats: [uncompressed] Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA *** [read] MD5 and SHA1 hashes: len = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00 A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00  1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00  17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00  0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02  01 02 02 01 01 ............. %% Initialized: [Session-1, SSL_NULL_WITH_NULL_NULL] %% Invalidated: [Session-1, SSL_NULL_WITH_NULL_NULL] Thread-1, SEND TLSv1.2 ALERT: fatal, description = handshake_failure Thread-1, WRITE: TLSv1.2 Alert, length = 2 [Raw write]: length = 7 0000: 15 03 03 00 02 02 28 ......( Thread-1, called closeSocket() Thread-1, handling exception: javax.net.ssl.SSLHandshakeException: no cipher suites in common 54301 ERROR reading: no cipher suites in common Removing client thread 54301 at 0 Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Process finished with exit code 130

 import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import javax.net.ssl.*; public class ChatClient implements Runnable { private SSLSocket socket = null; private Thread thread = null; private DataInputStream console = null; private DataOutputStream streamOut = null; private ChatClientThread client = null; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatClient(String serverName, int serverPort) { System.out.println("Establishing connection to server..."); try { SSLSocketFactory factory = null; SSLContext ctx = SSLContext.getInstance("TLS"); KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());   KeyStore ks= KeyStore.getInstance("JKS"); ks.load(new FileInputStream("clientkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("serverkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); factory = ctx.getSocketFactory(); socket = (SSLSocket)factory.createSocket(serverName, serverPort); socket.setEnabledCipherSuites(enabledCipherSuites); start(); } catch(UnknownHostException uhe) { // Host unkwnown System.out.println("Error establishing connection - host unknown: " + uhe.getMessage()); } catch(IOException ioexception) { // Other error establishing connection System.out.println("Error establishing connection - unexpected exception: " + ioexception.getMessage()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } }   public void run() {   while (thread != null) {   try {   // Sends message from console to server   streamOut.writeUTF(console.readLine());   streamOut.flush();   }   catch(IOException ioexception) {   System.out.println("Error sending string to server: " + ioexception.getMessage());   stop();   }   } } public void handle(String msg) { // Receives message from server if (msg.equals(".quit")) { // Leaving, quit command System.out.println("Exiting...Please press RETURN to exit ..."); stop(); } else // else, writes message received from server to console System.out.println(msg); } // Inits new client thread public void start() throws IOException { console = new DataInputStream(System.in); streamOut = new DataOutputStream(socket.getOutputStream()); if (thread == null) { client = new ChatClientThread(this, socket); thread = new Thread(this); thread.start(); } } // Stops client thread public void stop() { if (thread != null) { thread.stop(); thread = null; } try { if (console != null) console.close(); if (streamOut != null) streamOut.close(); if (socket != null) socket.close(); } catch(IOException ioe) { System.out.println("Error closing thread..."); } client.close(); client.stop(); } public static void main(String args[]) { ChatClient client = null; if (args.length != 2) // Displays correct usage syntax on stdout System.out.println("Usage: java ChatClient host port"); else // Calls new client client = new ChatClient(args[0], Integer.parseInt(args[1])); } } class ChatClientThread extends Thread { private SSLSocket socket = null; private ChatClient client = null; private DataInputStream streamIn = null; public ChatClientThread(ChatClient _client, SSLSocket _socket) { client = _client; socket = _socket; open(); start(); } public void open() { try { streamIn = new DataInputStream(socket.getInputStream()); } catch(IOException ioe) { System.out.println("Error getting input stream: " + ioe); client.stop(); } } public void close() { try { if (streamIn != null) streamIn.close(); } catch(IOException ioe) { System.out.println("Error closing input stream: " + ioe); } } public void run() { while (true) { try { client.handle(streamIn.readUTF()); } catch(IOException ioe) { System.out.println("Listening error: " + ioe.getMessage()); client.stop(); } } } }

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable { private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port) { try { // Binds to port and starts server System.out.println("Binding to port " + port); SSLContext ctx = SSLContext.getInstance("TLS");; KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm()); KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("serverkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("clientkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); server_socket = (SSLServerSocket) ssf.createServerSocket(port); server_socket.setEnabledCipherSuites(enabledCipherSuites); server_socket.setNeedClientAuth(true); System.out.println("Server started: " + server_socket); start(); } catch(IOException ioexception) { // Error binding to port System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); }  }  public void run() { while (thread != null) { try { // Adds new thread for new client System.out.println("Waiting for a client ..."); addThread((SSLSocket)server_socket.accept()); } catch(IOException ioexception) { System.out.println("Accept error: " + ioexception); stop(); } } }  public void start() { if (thread == null) { // Starts new thread for client thread = new Thread(this); thread.start(); } }    public void stop() { if (thread != null) { // Stops running thread for client thread.stop(); thread = null; }   }  private int findClient(int ID)   { // Returns client from id for (int i = 0; i < clientCount; i++) if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) {  int leaving_id = findClient(ID); // Client exits   clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id) clients[i].send("Client " +ID + " exits.."); remove(ID); } else  // Brodcast message for every other client online   for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input); }  public synchronized void remove(int ID)  { int pos = findClient(ID);  if (pos >= 0)   { // Removes thread for exiting client  ChatServerThread toTerminate = clients[pos];  System.out.println("Removing client thread " + ID + " at " + pos); if (pos < clientCount-1) for (int i = pos+1; i < clientCount; i++) clients[i-1] = clients[i]; clientCount--; try { toTerminate.close(); } catch(IOException ioe) { System.out.println("Error closing thread: " + ioe); }  toTerminate.stop();  } }    private void addThread(SSLSocket socket) { if (clientCount < clients.length) { // Adds thread for new accepted client System.out.println("Client accepted: " + socket); clients[clientCount] = new ChatServerThread(this, socket); try { clients[clientCount].open(); clients[clientCount].start(); clientCount++; } catch(IOException ioe)   {  System.out.println("Error opening thread: " + ioe);   } }   else   System.out.println("Client refused: maximum " + clients.length + " reached."); }  public static void main(String args[]) { ChatServer server = null;  if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread { private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null; public ChatServerThread(ChatServer _server, SSLSocket _socket) { super(); server = _server; socket = _socket; ID = socket.getPort(); } // Sends message to client public void send(String msg) { try { streamOut.writeUTF(msg); streamOut.flush(); } catch(IOException ioexception) { System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } } // Gets id for client public int getID() { return ID; } // Runs thread public void run() { System.out.println("Server Thread " + ID + " running."); while (true) { try { server.handle(ID, streamIn.readUTF()); } catch(IOException ioe) { System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } }    // Opens thread public void open() throws IOException { streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); } // Closes thread public void close() throws IOException { if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); } }

Here is the server's stack trace: /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/bin/java -Djavax.net.debug=all -Didea.launcher.port=7536 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 15.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath "/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/lib/tools.jar:/Users/joaogoncalves/Dropbox/STI/out/production/STI Assignment 3:/Applications/IntelliJ IDEA 15.app/Contents/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain ChatServer 5000 Binding to port 5000 adding as trusted cert: Subject: CN=Joao Goncalves, OU=DEQ, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c36 Valid from Mon May 23 23:43:42 WEST 2016 until Tue May 23 23:43:42 WEST 2017 adding as trusted cert: Subject: CN=www.uc.pt, OU=DEM, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c35 Valid from Mon May 23 23:42:54 WEST 2016 until Tue May 23 23:42:54 WEST 2017 adding as trusted cert: Subject: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xdb931da4e1abec22 Valid from Mon May 23 23:42:03 WEST 2016 until Tue May 23 23:42:03 WEST 2017   trigger seeding of SecureRandom done seeding SecureRandom Server started: [SSL: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=5000]] Waiting for a client ... Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Client accepted: 74ce57fc[SSL_NULL_WITH_NULL_NULL: Socket[addr=/127.0.0.1,port=57519,localport=5000]] Waiting for a client ... Server Thread 57519 running. Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 No available cipher suite for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 No available cipher suite for TLSv1.1 [Raw read]: length = 5 0000: 16 03 03 00 52 ....R [Raw read]: length = 82 0000: 01 00 00 4E 03 03 57 44 7B 3B B8 1E 77 88 AF 4E ...N..WD.;..w..N 0010: C7 CA 73 CE AC 38 62 5D 18 BD 9A 16 7E 25 86 25 ..s..8b].....%.% 0020: 36 1C EF F5 B6 FF 00 00 02 00 3D 01 00 00 23 00 6.........=...#. 0030: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0040: 01 03 03 03 01 02 03 02 01 02 02 01 01 FF 01 00 ................ 0050: 01 00 .. Thread-1, READ: TLSv1.2 Handshake, length = 82 *** ClientHello, TLSv1.2 RandomCookie: GMT: 1464105787 bytes = { 184, 30, 119, 136, 175, 78, 199, 202, 115, 206, 172, 56, 98, 93, 24, 189, 154, 22, 126, 37, 134, 37, 54, 28, 239, 245, 182, 255 } Session ID: {} Cipher Suites: [TLS_RSA_WITH_AES_256_CBC_SHA256] Compression Methods: { 0 } Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA Extension renegotiation_info, renegotiated_connection: <empty> *** [read] MD5 and SHA1 hashes: len = 82 0000: 01 00 00 4E 03 03 57 44 7B 3B B8 1E 77 88 AF 4E ...N..WD.;..w..N 0010: C7 CA 73 CE AC 38 62 5D 18 BD 9A 16 7E 25 86 25 ..s..8b].....%.% 0020: 36 1C EF F5 B6 FF 00 00 02 00 3D 01 00 00 23 00 6.........=...#. 0030: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0040: 01 03 03 03 01 02 03 02 01 02 02 01 01 FF 01 00 ................ 0050: 01 00 .. %% Initialized: [Session-1, SSL_NULL_WITH_NULL_NULL] %% Invalidated: [Session-1, SSL_NULL_WITH_NULL_NULL] Thread-1, SEND TLSv1.2 ALERT: fatal, description = handshake_failure Thread-1, WRITE: TLSv1.2 Alert, length = 2 [Raw write]: length = 7 0000: 15 03 03 00 02 02 28 ......( Thread-1, called closeSocket() Thread-1, handling exception: javax.net.ssl.SSLHandshakeException: no cipher suites in common 57519 ERROR reading: no cipher suites in common Removing client thread 57519 at 0 Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Process finished with exit code 130

added 59 characters in body

Source Link

edited May 24, 2016 at 15:37

joao-prg

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable { private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port) { try { // Binds to port and starts server System.out.println("Binding to port " + port); SSLContext ctx = SSLContext.getInstance("TLS");; KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("serverkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("clientkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); server_socket = (SSLServerSocket) ssf.createServerSocket(port); server_socket.setEnabledCipherSuites(server_socket.getSupportedCipherSuites()); server_socket.setNeedClientAuth(true); System.out.println("Server started: " + server_socket); start(); } catch(IOException ioexception) { // Error binding to port System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } } public void run() { while (thread != null) { try { // Adds new thread for new client System.out.println("Waiting for a client ..."); addThread((SSLSocket)server_socket.accept()); } catch(IOException ioexception) { System.out.println("Accept error: " + ioexception); stop(); } } } public void start() { if (thread == null) { // Starts new thread for client thread = new Thread(this); thread.start(); } } public void stop() { if (thread != null) { // Stops running thread for client thread.stop(); thread = null; } } private int findClient(int ID) { // Returns client from id for (int i = 0; i < clientCount; i++) if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) { int leaving_id = findClient(ID); // Client exits clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id) clients[i].send("Client " +ID + " exits.."); remove(ID); } else // Brodcast message for every other client online for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input); } public synchronized void remove(int ID) { int pos = findClient(ID); if (pos >= 0) { // Removes thread for exiting client ChatServerThread toTerminate = clients[pos]; System.out.println("Removing client thread " + ID + " at " + pos); if (pos < clientCount-1) for (int i = pos+1; i < clientCount; i++) clients[i-1] = clients[i]; clientCount--; try { toTerminate.close(); } catch(IOException ioe) { System.out.println("Error closing thread: " + ioe); } toTerminate.stop(); } } private void addThread(SSLSocket socket) { if (clientCount < clients.length) { // Adds thread for new accepted client System.out.println("Client accepted: " + socket); clients[clientCount] = new ChatServerThread(this, socket); try { clients[clientCount].open(); clients[clientCount].start(); clientCount++; } catch(IOException ioe) { System.out.println("Error opening thread: " + ioe); } } else System.out.println("Client refused: maximum " + clients.length + " reached."); } public static void main(String args[]) { ChatServer server = null; if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread { private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null; public ChatServerThread(ChatServer _server, SSLSocket _socket) { super(); server = _server; socket = _socket; ID = socket.getPort(); } // Sends message to client public void send(String msg) { try { streamOut.writeUTF(msg); streamOut.flush(); } catch(IOException ioexception) { System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } } // Gets id for client public int getID() { return ID; } // Runs thread public void run() { System.out.println("Server Thread " + ID + " running."); while (true) { try { server.handle(ID, streamIn.readUTF()); } catch(IOException ioe) { System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } }   // Opens thread public void open() throws IOException { streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); } // Closes thread public void close() throws IOException { if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); } }

Here is the server's stack trace:

Binding to port 5000 adding as trusted cert: Subject: CN=Joao Goncalves, OU=DEQ, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c36 Valid from Mon May 23 23:43:42 WEST 2016 until Tue May 23 23:43:42 WEST 2017 adding as trusted cert: Subject: CN=www.uc.pt, OU=DEM, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c35 Valid from Mon May 23 23:42:54 WEST 2016 until Tue May 23 23:42:54 WEST 2017 adding as trusted cert: Subject: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xdb931da4e1abec22 Valid from Mon May 23 23:42:03 WEST 2016 until Tue May 23 23:42:03 WEST 2017 trigger seeding of SecureRandom done seeding SecureRandom Server started: [SSL: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=5000]] Waiting for a client ... Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Client accepted: 7dfb3d0[SSL_NULL_WITH_NULL_NULL: Socket[addr=/127.0.0.1,port=54301,localport=5000]] Waiting for a client ... Server Thread 54301 running. Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.1 [Raw read]: length = 5 0000: 16 03 03 01 2D ....- [Raw read]: length = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00 A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00 0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. Thread-1, READ: TLSv1.2 Handshake, length = 301 *** ClientHello, TLSv1.2 RandomCookie: GMT: 1464103814 bytes = { 227, 43, 213, 201, 216, 65, 173, 146, 128, 172, 40, 7, 136, 20, 9, 160, 181, 224, 230, 155, 24, 226, 93, 242, 90, 14, 20, 31 } Session ID: {} Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV, TLS_DH_anon_WITH_AES_256_GCM_SHA384, TLS_DH_anon_WITH_AES_128_GCM_SHA256, TLS_DH_anon_WITH_AES_256_CBC_SHA256, TLS_ECDH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA256, TLS_ECDH_anon_WITH_AES_128_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA, TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, SSL_DH_anon_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_DHE_RSA_WITH_DES_CBC_SHA, SSL_DHE_DSS_WITH_DES_CBC_SHA, SSL_DH_anon_WITH_DES_CBC_SHA, SSL_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA, TLS_RSA_WITH_NULL_SHA256, TLS_ECDHE_ECDSA_WITH_NULL_SHA, TLS_ECDHE_RSA_WITH_NULL_SHA, SSL_RSA_WITH_NULL_SHA, TLS_ECDH_ECDSA_WITH_NULL_SHA, TLS_ECDH_RSA_WITH_NULL_SHA, TLS_ECDH_anon_WITH_NULL_SHA, SSL_RSA_WITH_NULL_MD5, TLS_KRB5_WITH_3DES_EDE_CBC_SHA, TLS_KRB5_WITH_3DES_EDE_CBC_MD5, TLS_KRB5_WITH_DES_CBC_SHA, TLS_KRB5_WITH_DES_CBC_MD5, TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5] Compression Methods: { 0 } Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1} Extension ec_point_formats, formats: [uncompressed] Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA *** [read] MD5 and SHA1 hashes: len = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00 A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00 0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. %% Initialized: [Session-1, SSL_NULL_WITH_NULL_NULL] %% Invalidated: [Session-1, SSL_NULL_WITH_NULL_NULL] Thread-1, SEND TLSv1.2 ALERT: fatal, description = handshake_failure Thread-1, WRITE: TLSv1.2 Alert, length = 2 [Raw write]: length = 7 0000: 15 03 03 00 02 02 28 ......( Thread-1, called closeSocket() Thread-1, handling exception: javax.net.ssl.SSLHandshakeException: no cipher suites in common 54301 ERROR reading: no cipher suites in common Removing client thread 54301 at 0 Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Process finished with exit code 130

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable { private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port) { try { // Binds to port and starts server System.out.println("Binding to port " + port); SSLContext ctx = SSLContext.getInstance("TLS");; KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("serverkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("clientkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); server_socket = (SSLServerSocket) ssf.createServerSocket(port); server_socket.setEnabledCipherSuites(server_socket.getSupportedCipherSuites()); server_socket.setNeedClientAuth(true); System.out.println("Server started: " + server_socket); start(); } catch(IOException ioexception) { // Error binding to port System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } } public void run() { while (thread != null) { try { // Adds new thread for new client System.out.println("Waiting for a client ..."); addThread((SSLSocket)server_socket.accept()); } catch(IOException ioexception) { System.out.println("Accept error: " + ioexception); stop(); } } } public void start() { if (thread == null) { // Starts new thread for client thread = new Thread(this); thread.start(); } } public void stop() { if (thread != null) { // Stops running thread for client thread.stop(); thread = null; } } private int findClient(int ID) { // Returns client from id for (int i = 0; i < clientCount; i++) if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) { int leaving_id = findClient(ID); // Client exits clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id) clients[i].send("Client " +ID + " exits.."); remove(ID); } else // Brodcast message for every other client online for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input); } public synchronized void remove(int ID) { int pos = findClient(ID); if (pos >= 0) { // Removes thread for exiting client ChatServerThread toTerminate = clients[pos]; System.out.println("Removing client thread " + ID + " at " + pos); if (pos < clientCount-1) for (int i = pos+1; i < clientCount; i++) clients[i-1] = clients[i]; clientCount--; try { toTerminate.close(); } catch(IOException ioe) { System.out.println("Error closing thread: " + ioe); } toTerminate.stop(); } } private void addThread(SSLSocket socket) { if (clientCount < clients.length) { // Adds thread for new accepted client System.out.println("Client accepted: " + socket); clients[clientCount] = new ChatServerThread(this, socket); try { clients[clientCount].open(); clients[clientCount].start(); clientCount++; } catch(IOException ioe) { System.out.println("Error opening thread: " + ioe); } } else System.out.println("Client refused: maximum " + clients.length + " reached."); } public static void main(String args[]) { ChatServer server = null; if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread { private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null; public ChatServerThread(ChatServer _server, SSLSocket _socket) { super(); server = _server; socket = _socket; ID = socket.getPort(); } // Sends message to client public void send(String msg) { try { streamOut.writeUTF(msg); streamOut.flush(); } catch(IOException ioexception) { System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } } // Gets id for client public int getID() { return ID; } // Runs thread public void run() { System.out.println("Server Thread " + ID + " running."); while (true) { try { server.handle(ID, streamIn.readUTF()); } catch(IOException ioe) { System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } }   // Opens thread public void open() throws IOException { streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); } // Closes thread public void close() throws IOException { if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); } }

import java.net.*; import java.io.*; import java.security.*; import java.security.cert.CertificateException; import java.util.Arrays; import javax.net.ServerSocketFactory; import javax.net.ssl.*; public class ChatServer implements Runnable { private ChatServerThread clients[] = new ChatServerThread[20]; private SSLServerSocket server_socket = null; private Thread thread = null; private int clientCount = 0; final String[] enabledCipherSuites = {"TLS_RSA_WITH_AES_256_CBC_SHA256"}; final char[] passphrase = "123456".toCharArray(); public ChatServer(int port) { try { // Binds to port and starts server System.out.println("Binding to port " + port); SSLContext ctx = SSLContext.getInstance("TLS");; KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("serverkeystore"), passphrase); kmf.init(ks, passphrase); KeyStore serverKey = KeyStore.getInstance("JKS"); serverKey.load(new FileInputStream("clientkeystore"),passphrase); TrustManagerFactory trustManager = TrustManagerFactory.getInstance("SunX509"); trustManager.init(serverKey); ctx.init(kmf.getKeyManagers(), trustManager.getTrustManagers(), null); SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); server_socket = (SSLServerSocket) ssf.createServerSocket(port); server_socket.setEnabledCipherSuites(server_socket.getSupportedCipherSuites()); server_socket.setNeedClientAuth(true); System.out.println("Server started: " + server_socket); start(); } catch(IOException ioexception) { // Error binding to port System.out.println("Binding error (port=" + port + "): " + ioexception.getMessage()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (UnrecoverableKeyException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } } public void run() { while (thread != null) { try { // Adds new thread for new client System.out.println("Waiting for a client ..."); addThread((SSLSocket)server_socket.accept()); } catch(IOException ioexception) { System.out.println("Accept error: " + ioexception); stop(); } } } public void start() { if (thread == null) { // Starts new thread for client thread = new Thread(this); thread.start(); } } public void stop() { if (thread != null) { // Stops running thread for client thread.stop(); thread = null; } } private int findClient(int ID) { // Returns client from id for (int i = 0; i < clientCount; i++) if (clients[i].getID() == ID) return i; return -1; } public synchronized void handle(int ID, String input) { if (input.equals(".quit")) { int leaving_id = findClient(ID); // Client exits clients[leaving_id].send(".quit"); // Notify remaing users for (int i = 0; i < clientCount; i++) if (i!=leaving_id) clients[i].send("Client " +ID + " exits.."); remove(ID); } else // Brodcast message for every other client online for (int i = 0; i < clientCount; i++) clients[i].send(ID + ": " + input); } public synchronized void remove(int ID) { int pos = findClient(ID); if (pos >= 0) { // Removes thread for exiting client ChatServerThread toTerminate = clients[pos]; System.out.println("Removing client thread " + ID + " at " + pos); if (pos < clientCount-1) for (int i = pos+1; i < clientCount; i++) clients[i-1] = clients[i]; clientCount--; try { toTerminate.close(); } catch(IOException ioe) { System.out.println("Error closing thread: " + ioe); } toTerminate.stop(); } } private void addThread(SSLSocket socket) { if (clientCount < clients.length) { // Adds thread for new accepted client System.out.println("Client accepted: " + socket); clients[clientCount] = new ChatServerThread(this, socket); try { clients[clientCount].open(); clients[clientCount].start(); clientCount++; } catch(IOException ioe) { System.out.println("Error opening thread: " + ioe); } } else System.out.println("Client refused: maximum " + clients.length + " reached."); } public static void main(String args[]) { ChatServer server = null; if (args.length != 1) // Displays correct usage for server System.out.println("Usage: java ChatServer port"); else // Calls new server server = new ChatServer(Integer.parseInt(args[0])); } } class ChatServerThread extends Thread { private ChatServer server = null; private SSLSocket socket = null; private int ID = -1; private DataInputStream streamIn = null; private DataOutputStream streamOut = null; public ChatServerThread(ChatServer _server, SSLSocket _socket) { super(); server = _server; socket = _socket; ID = socket.getPort(); } // Sends message to client public void send(String msg) { try { streamOut.writeUTF(msg); streamOut.flush(); } catch(IOException ioexception) { System.out.println(ID + " ERROR sending message: " + ioexception.getMessage()); server.remove(ID); stop(); } } // Gets id for client public int getID() { return ID; } // Runs thread public void run() { System.out.println("Server Thread " + ID + " running."); while (true) { try { server.handle(ID, streamIn.readUTF()); } catch(IOException ioe) { System.out.println(ID + " ERROR reading: " + ioe.getMessage()); server.remove(ID); stop(); } } } // Opens thread public void open() throws IOException { streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream())); streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); } // Closes thread public void close() throws IOException { if (socket != null) socket.close(); if (streamIn != null) streamIn.close(); if (streamOut != null) streamOut.close(); } }

Here is the server's stack trace:

Binding to port 5000 adding as trusted cert: Subject: CN=Joao Goncalves, OU=DEQ, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c36 Valid from Mon May 23 23:43:42 WEST 2016 until Tue May 23 23:43:42 WEST 2017 adding as trusted cert: Subject: CN=www.uc.pt, OU=DEM, O=UC, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xc94895f3863a5c35 Valid from Mon May 23 23:42:54 WEST 2016 until Tue May 23 23:42:54 WEST 2017 adding as trusted cert: Subject: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Issuer: CN=DEI, OU=DEI, O=UC, L=Coimbra, ST=Coimbra, C=PT Algorithm: RSA; Serial number: 0xdb931da4e1abec22 Valid from Mon May 23 23:42:03 WEST 2016 until Tue May 23 23:42:03 WEST 2017 trigger seeding of SecureRandom done seeding SecureRandom Server started: [SSL: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=5000]] Waiting for a client ... Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Client accepted: 7dfb3d0[SSL_NULL_WITH_NULL_NULL: Socket[addr=/127.0.0.1,port=54301,localport=5000]] Waiting for a client ... Server Thread 54301 running. Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.1 [Raw read]: length = 5 0000: 16 03 03 01 2D ....- [Raw read]: length = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00 A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00 0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. Thread-1, READ: TLSv1.2 Handshake, length = 301 *** ClientHello, TLSv1.2 RandomCookie: GMT: 1464103814 bytes = { 227, 43, 213, 201, 216, 65, 173, 146, 128, 172, 40, 7, 136, 20, 9, 160, 181, 224, 230, 155, 24, 226, 93, 242, 90, 14, 20, 31 } Session ID: {} Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV, TLS_DH_anon_WITH_AES_256_GCM_SHA384, TLS_DH_anon_WITH_AES_128_GCM_SHA256, TLS_DH_anon_WITH_AES_256_CBC_SHA256, TLS_ECDH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_256_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA256, TLS_ECDH_anon_WITH_AES_128_CBC_SHA, TLS_DH_anon_WITH_AES_128_CBC_SHA, TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, SSL_DH_anon_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_DHE_RSA_WITH_DES_CBC_SHA, SSL_DHE_DSS_WITH_DES_CBC_SHA, SSL_DH_anon_WITH_DES_CBC_SHA, SSL_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA, TLS_RSA_WITH_NULL_SHA256, TLS_ECDHE_ECDSA_WITH_NULL_SHA, TLS_ECDHE_RSA_WITH_NULL_SHA, SSL_RSA_WITH_NULL_SHA, TLS_ECDH_ECDSA_WITH_NULL_SHA, TLS_ECDH_RSA_WITH_NULL_SHA, TLS_ECDH_anon_WITH_NULL_SHA, SSL_RSA_WITH_NULL_MD5, TLS_KRB5_WITH_3DES_EDE_CBC_SHA, TLS_KRB5_WITH_3DES_EDE_CBC_MD5, TLS_KRB5_WITH_DES_CBC_SHA, TLS_KRB5_WITH_DES_CBC_MD5, TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5] Compression Methods: { 0 } Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1} Extension ec_point_formats, formats: [uncompressed] Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA *** [read] MD5 and SHA1 hashes: len = 301 0000: 01 00 01 29 03 03 57 44 74 86 E3 2B D5 C9 D8 41 ...)..WDt..+...A 0010: AD 92 80 AC 28 07 88 14 09 A0 B5 E0 E6 9B 18 E2 ....(........... 0020: 5D F2 5A 0E 14 1F 00 00 A4 C0 24 C0 28 00 3D C0 ].Z.......$.(.=. 0030: 26 C0 2A 00 6B 00 6A C0 0A C0 14 00 35 C0 05 C0 &.*.k.j.....5... 0040: 0F 00 39 00 38 C0 23 C0 27 00 3C C0 25 C0 29 00 ..9.8.#.'.<.%.). 0050: 67 00 40 C0 09 C0 13 00 2F C0 04 C0 0E 00 33 00 g.@...../.....3. 0060: 32 C0 2C C0 2B C0 30 00 9D C0 2E C0 32 00 9F 00 2.,.+.0.....2... 0070: A3 C0 2F 00 9C C0 2D C0 31 00 9E 00 A2 C0 08 C0 ../...-.1....... 0080: 12 00 0A C0 03 C0 0D 00 16 00 13 00 FF 00 A7 00 ................ 0090: A6 00 6D C0 19 00 3A 00 6C C0 18 00 34 C0 17 00 ..m...:.l...4... 00A0: 1B 00 09 00 15 00 12 00 1A 00 08 00 14 00 11 00 ................ 00B0: 19 00 3B C0 06 C0 10 00 02 C0 01 C0 0B C0 15 00 ..;............. 00C0: 01 00 1F 00 23 00 1E 00 22 00 26 00 29 01 00 00 ....#...".&.)... 00D0: 5C 00 0A 00 34 00 32 00 17 00 01 00 03 00 13 00 \...4.2......... 00E0: 15 00 06 00 07 00 09 00 0A 00 18 00 0B 00 0C 00 ................ 00F0: 19 00 0D 00 0E 00 0F 00 10 00 11 00 02 00 12 00 ................ 0100: 04 00 05 00 14 00 08 00 16 00 0B 00 02 01 00 00 ................ 0110: 0D 00 1A 00 18 06 03 06 01 05 03 05 01 04 03 04 ................ 0120: 01 03 03 03 01 02 03 02 01 02 02 01 01 ............. %% Initialized: [Session-1, SSL_NULL_WITH_NULL_NULL] %% Invalidated: [Session-1, SSL_NULL_WITH_NULL_NULL] Thread-1, SEND TLSv1.2 ALERT: fatal, description = handshake_failure Thread-1, WRITE: TLSv1.2 Alert, length = 2 [Raw write]: length = 7 0000: 15 03 03 00 02 02 28 ......( Thread-1, called closeSocket() Thread-1, handling exception: javax.net.ssl.SSLHandshakeException: no cipher suites in common 54301 ERROR reading: no cipher suites in common Removing client thread 54301 at 0 Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Thread-1, called close() Thread-1, called closeInternal(true) Process finished with exit code 130