Authenticate to Google Talk (XMPP, Smack) using an authToken

Question

The app I\'m writing is connecting to a XMPP server, and if the user chooses, I want to give them the option to connect to their google chat account, without having to enter

Answer 1

You're looking for documentation on the X-GOOGLE-TOKEN SASL mechanism. This should be the beginning. Use service=mail:

https://www.google.com/accounts/ClientLogin?
    accountType=GOOGLE&
    Email=YOURUSERNAME@gmail.com&
    Passwd=YOURPASSWORD&
    service=mail

Which will return 200 OK and three values:

SID=<long string>
LSID=<long string>
Auth=<long string>

Parse out the Auth string, then construct a string with this form:

jidAndToken ="\0" + UTF8(YOURUSERNAME@gmail.com) + "\0" + Auth

(where "\0" is intended to be a single octet with value zero). Use this in the initial SASL auth:

<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' 
      mechanism='X-GOOGLE-TOKEN'>Base64(jidAndToken)</auth>