Using Apache MINA to create SSL/TLS connection with client certificate

TunnelClient.java

import org.apache.mina.filter.ssl.SslFilter;
import org.apache.mina.transport.socket.nio.NioSocketConnector;


public class TunnelClient{
    .......
    NioSocketConnector nioConnector = new NioSocketConnector(1);
    nioConnector.setDefaultRemoteAddress(tunnelServerAddress);
    nioConnector.setHandler(handler);
    SslFilter sslFilter = new SslFilter(getSSLContext());			
    sslFilter.setUseClientMode(true);
    ...
    nioConnector.getFilterChain().addFirst("sslFilter", sslFilter)
      
   /**
	 * @return generated SSLContext or <code>null</code> if failed.
	 */
	public SSLContext getSSLContext(){
		SSLContext sslContext;
		try {
			sslContext = SSLContext.getInstance("TLS");
		} catch (NoSuchAlgorithmException ex) {
			LOG.error("TLS protocol is not defined in the system");			
			return null;
		}
		KeyManager keyManagers[] = null;			
    try{								
      KeyStore p12 = KeyStore.getInstance("PKCS12");
      ByteArrayInputStream bis = new ByteArrayInputStream(/*binary source - file or object*/);
      //FIXME
      p12.load(bis, null);
      KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
      kmf.init(p12, "".toCharArray());
      keyManagers = kmf.getKeyManagers();
    }catch(Exception e){					
      if(LOG.isTraceEnabled()){
        LOG.warn("Failed to get keymanager for creating SSL connection", e);
      }else{
        LOG.debug("Failed to get keymanager for creating SSL connection: {}", e.getMessage());
      }
      return null;
    }
    try {
	sslContext.init(keyManagers, getEmptyTrustingManager, null);
	return sslContext;
	} catch (KeyManagementException e) {
		LOG.error("Failed to initialized TLS context");
		LOG.debug("Reason:", e);
		return null;
	}
			
	/**
	 * @return trustManager trusting everyone&mdash;doesn't perform any SSL-certificate checking.
	 */
    public static TrustManager[] getEmptyTrustingManager() { 
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() { 
            @Override 
            public java.security.cert.X509Certificate[] getAcceptedIssuers() { 
                return null; 
            }  
            @Override 
            public void checkClientTrusted(X509Certificate[] certs, String authType) {} 
            @Override 
            public void checkServerTrusted(X509Certificate[] certs, String authType) {} 
        } }; 
        return trustAllCerts; 
    }
}