Stream XML TO connect Gtalk Server - Forum

elyoni

2012-08-23, 13:24 #1

Member since Aug 2012 · 2 posts
Group memberships: Members

Show profile ·

Link to this post

Subject: Stream XML TO connect Gtalk Server

Hello
I am a labview developer, and there is no XMPP library for labview, then i need to build my on library.

i started to read the book "XMPP: The Definitive Guide" but i still stuck in the Handshake part.

This what i did
i connect with TCP to gtalk server, and send this XML

<?xml version="1.0"?>
    <stream:stream  to="gmail.com"
            version="1.0"
            xmlns="jabber:client"
            xmlns:stream="http://etherx.jabber.org/streams">

And the Server send me back the connections options:

<stream:stream from="gmail.com"
        id="5649958EB8EE38BA"
        version="1.0"
        xmlns:stream="http://etherx.jabber.org/streams"
        xmlns="jabber:client">
        
<stream:features>
    <starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"><required/>
    </starttls><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
        <mechanism>X-GOOGLE-TOKEN</mechanism>
        <mechanism>X-OAUTH2</mechanism>
        </mechanisms>
    </stream:features>

In the start i tried to connect the server with TLS then i send:

<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>

And the server send me back that:

<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>

But after i get this msg the server kick me off.

Then i tried to connect the server with SASL I send:

<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="X-GOOGLE-TOKEN">Base64{User And Password}</auth>

And the server send me back:

<failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><incorrect-encoding/></failure></stream:stream>

I think that i didn't understand how the encoding work, in the book it said

(The Base64-decoded string is <0>alice<0>password—clearly Alice needs some instruc-tion on best practices for information security.)

what i need to write instead of the <0>. in the internet it say NULL. How to send null in text?

thanks for your help, and sorry for my english

This post was edited 2 times, last on 2012-08-23, 15:34 by Alex.

Alex

2012-08-23, 13:56 #2

Member since Feb 2003 · 4449 posts · Location: Germany
Group memberships: Administrators, Members

Show profile ·

Link to this post

after:

<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>

you have to update your socket to TLS, have you done this?

Then you must reject the existing stream and start again with sending the stream header:

<stream:stream to="gmail.com"
            version="1.0"
            xmlns="jabber:client"
            xmlns:stream="http://etherx.jabber.org/streams">

and wait for the reply of the server an its stream features (options).

Alex

elyoni

2012-08-23, 15:13 #3

Member since Aug 2012 · 2 posts
Group memberships: Members

Show profile ·

Link to this post

Thanks for your reply,

i don't know what is mean to update the socket, you can explain more?

What about the SASL Connection?
what i am doing wrong?

Yoni,

This post was edited on 2012-08-23, 15:33 by Alex.

Alex

2012-08-23, 15:33 #4

Member since Feb 2003 · 4449 posts · Location: Germany
Group memberships: Administrators, Members

Show profile ·

Link to this post

Quote by elyoni:
i don't know what is mean to update the socket, you can explained more?

Please read here about TLS here:
http://en.wikipedia.org/wiki/Transport_Layer_Security

After you sent:

<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>

and the server replied with:

<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>

you must switch to a secure socket. I think you are not doing this already.

Alex