Linux: java SSL socket connections sample code

1. The SSL server

public class SSLServer {
    public static void main(String args[]) {
        //set which keystore to use
        System.setProperty("javax.net.ssl.keyStore", "<path>/<keystore file name>");
        System.setProperty("javax.net.ssl.keyStorePassword", "<keystore password>");

        try {
            // Create a trust manager that does not validate certificate chains
            TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {
                  public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) { }
                  public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
                  public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                         return null;
                  }
             }};

             //Load the keystore
             KeyStore ks = KeyStore.getInstance("JKS");
             InputStream readCert = new FileInputStream("<path>/<keystore file name>");
             try {
                  ks.load(readCert, "<keystore password>".toCharArray());
              } finally {
                  readCert.close();
              }

              //Initialize the KeyManagerFactory
              KeyManagerFactory kmf = KeyManagerFactory.getInstance(
                    KeyManagerFactory.getDefaultAlgorithm());
              kmf.init(ks, "<keystore password>".toCharArray());

              //Initialize the SSLContext
              SSLContext sc = SSLContext.getInstance("TLSv1.2");
              sc.init(kmf.getKeyManagers(), trustManagers, new SecureRandom());

              //Create the SSLServerSocket
              SSLServerSocket serverSocket = (SSLServerSocket) sc.getServerSocketFactory().createServerSocket(csServerPort);
              serverSocket.setEnabledProtocols(new String[]{"TLSv1", "TLSv1.1", "TLSv1.2", "SSLv3"});

            while (true) {
                //accept connections from client
                Socket s = ss.accept();

                //the reader
                BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
                //the wirter
                PrintStream out = new PrintStream(s.getOutputStream());
                String message;
                while (!(message = in.readLine()).equals("end")) {
                      if (message.equals("Got it?")){
                            out.println("Yes, received.");
                      } else if (message.equals("Hello")) {
                            out.println("Hi");
                      } else if (message.equals("Thanks")){
                            out.println("end");
                      }
                }
                out.close();
                s.close();
            }
        } catch (IOException e) {
            e.printStackTrace(System.out);
        }
    }
}

2. The SSL Client

public class SSLClient {
    public static void main(String args[]) throws Exception {
          System.setProperty("javax.net.ssl.trustStore", "<path>/<truststore file name>");
          System.setProperty("javax.net.ssl.keyStorePassword", "<truststore password>");

          // Create a trust manager that does not validate certificate chains
          TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {
                  public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) { }
                  public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
                  public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                         return null;
                  }
             }};

             //Load the keystore
             KeyStore ks = KeyStore.getInstance("JKS");
             FileInputStream readCert = new FileInputStream("<path>/<truststore file name>");
             try {
                  ks.load(readCert, "<truststore password>".toCharArray());
              } finally {
                  readCert.close();
              }

              //Initialize the KeyManagerFactory
              KeyManagerFactory kmf = KeyManagerFactory.getInstance(
                    KeyManagerFactory.getDefaultAlgorithm());
              kmf.init(ks, "<truststore password>".toCharArray());

              //Initialize the SSLContext
              SSLContext sc = SSLContext.getInstance("TLSv1.2");
              sc.init(kmf.getKeyManagers(), trustManagers, new SecureRandom());

              SSLSocketFactory socketFactory = sc.getSocketFactory(); 

              SSLSocket socket = (SSLSocket)socketFactory.createSocket("<server IP>", <port>);               

              socket.setEnabledCipherSuites(socket.getSupportedCipherSuites());

              // SSLSession session = socket.getSession();
              // Certificate[] cchain = session.getPeerCertificates();
              //System.out.println("The Certificates used by peer");
              //for (int i = 0; i < cchain.length; i++) {
                   //  System.out.println(((X509Certificate) cchain[i]).getSubjectDN());
              // }
              // System.out.println("Peer host is " + session.getPeerHost());
              // System.out.println("Cipher is " + session.getCipherSuite());
              // System.out.println("Protocol is " + session.getProtocol());
              // System.out.println("ID is " + new BigInteger(session.getId()));
              //System.out.println("Session created in " + session.getCreationTime());
              // System.out.println("Session accessed in " + session.getLastAccessedTime());

              PrintStream out = new PrintStream(s.getOutputStream());
              out.println("Hello");
             BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
             String x;
             while(!(x = in.readLine()).equals("end")){
                   System.out.println(x);
                   if (x.equals("Hi")){
                        out.println("Got it?");
                   } else if (x.equals("Yes, received.")){
                       out.println("Thanks");
                   }
             }
             out.println("end");
             in.close();
             out.close();
            s.close();
      }
}

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