code:     public void handshake(Socket sock) throws IOException {
          ((SSLSocket)sock).startHandshake();
      }
  
      /*
       * Determines the SSL cipher suites to be enabled.
       *
       * @param requestedCiphers Comma-separated list of requested ciphers
       * @param supportedCiphers Array of supported ciphers
       *
       * @return Array of SSL cipher suites to be enabled, or null if none of the
       * requested ciphers are supported
       */
  