Tunnel to establish an SSL connection inside a SSL connection

I have an application that establishes a SSL30Connection with a web proxy server. This connection is opened using the ConnectionFactory. To enable HTTPS through proxy web, trying to create an SSL connection to a website (for example google.com) that uses the proxy server of SSL connection as its "subConnection" (see javadocs for SSL30Connection). When I try to do, I find myself with an EOFException or a ConnectionClosedException.

I am aware of the workaround described here and have tried to use it, but still, the SSL connection to the remote server does not.

Does anyone know if this kind of functionality is supported by the BB? Is there a 3rd party API that could achieve this?

I open a topic in the RIM developer Issue Tracker as well:

https://www.BlackBerry.com/jira/browse/JAVAAPI-2179

Thank you.

It turns out that several things went wrong.

(1) the proxy has been close the connection after I read the response HTTP CONNECT. The fix for this consisted of two parts:

++ By adding a "Proxy-Connection: keep-alive" header.

+ Changing the way I read the answer. Before, I read the inputStream in 256 b pieces until Ihit-1. I changed it to simply read until I touched a line return character as the CONNECTION response is onlyone linelong.

After you make these changes, I was able to make a socket: / / connection to the proxy and then do a ssl: / / to the remote server with the proxy as subConnection of ssl connection. However, when I tried to do a ssl: / / connection to the server, I always got the EOFException at the opening of the ssl: / / connection to the remote server. Then, like Santa himself immersed in to give me a Christmas gift at the beginning... I remembered that I had met problems with ssl: / / connections before; specifically, to write data to an ssl: / / OutputStream of connection REQUIRES a call to OutputStream.flush (). If you don't flush, data is never written (or the buffer is really big... anyway, adding that a function flush() suits). Remember this problem led me to the last part of the solution to this problem.

(2) I wrapped the proxy ssl connection and its already open input and output stream in a class that looks like this:

public class ProxyStreamConnectionWrapper implements StreamConnection {

    private StreamConnection stream;
    private DataInputStream inputStream;
    private DataOutputStream outputStream;

    public ProxyStreamConnectionWrapper(StreamConnection stream, DataInputStream dataInputStream, DataOutputStream dataOutputStream) {

        this.stream = stream;
        this.inputStream = dataInputStream;
        this.outputStream = dataOutputStream;
    }

    public DataInputStream openDataInputStream() throws IOException {

        return inputStream;
    }

    public InputStream openInputStream() throws IOException {

        return inputStream;
    }

    public void close() throws IOException {

        stream.close();
    }

    public DataOutputStream openDataOutputStream() throws IOException {

        return new DataOutputStream( openOutputStream() );
    }

    public OutputStream openOutputStream() throws IOException {

        return new OutputStream() {

            public void write( byte[] b, int off, int len ) throws IOException {

                outputStream.write( b, off, len );
                outputStream.flush();
            }

            public void write( byte[] b ) throws IOException {

                outputStream.write( b );
                outputStream.flush();
            }

            public void write( int b ) throws IOException {

                outputStream.write( b );
                outputStream.flush();
            }
        };
}

I got the idea of this wrapper from a previous post I already linked to above. The solution is in the openOutputStream() method. Adding the function flush() after each write the ssl handshake forces given the connection to the remote server ssl proxy server offline.

Merry Christmas!

Tags: BlackBerry Developers

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-----------------

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Tunnel to establish an SSL connection inside a SSL connection

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