Create unconnected SSLSocket over an existing Socket in Java

Question

I am implementing a custom TLS socket factory over a SOCKS proxy. Among other methods I should override is Socket createSocket() which just creates an unconnected Socket which will be connected somewhere later in the code.

So in the TLS socket factory without a SOCKS proxy, the way I implement it is the following:

@Override
public Socket createSocket() throws IOException, UnknownHostException {
  // Initialize my SSL Context
  SSLContext sslCtx = initializeSSLContext();
  SSLSocketFactory socketFactory = sslCtx.getSocketFactory();
  // Return an unconnected socket
  return socketFactory.createSocket();
}

In my TLS socket factory over SOCKS the equivalent is roughly like this:

@Override
  public Socket createSocket() throws IOException, UnknownHostException {
    // proxy is an instance of java.net.Proxy
    Socket socks = new Socket(proxy);

    // Initialize my SSL context
    SSLContext sslCtx = initializeSSLContext();
    SSLSocketFactory socketFactory = sslCtx.getSocketFactory();
    return socketFactory.createSocket(socks, ????, ????, true);
  }

As I mentioned earlier I need to be able to create a socket without connecting it. SSLSocketFactory provides two methods to create sockets over an existing one but both assume that you know the host:port you are connecting to.

Is there any way to create a TLS socket over an existing socket (proxy) but without providing the target host?

Thanks in advance

Answer 1

Use SSLSocketFactory.createSocket() to create an unconnected socket. Check the docs here for more details SSLSocketFactory