I am currently working on a blackberry app that needs to connect to facebook chat. I am attempting to use the XMPP/Jabber interface. I can get the challenge from the server, however when I send my response I get a "not authorized" failure. My response is structured in this way:
api_key=[my api key]&call_id=[time in millis]&method=auth.xmpp_login&nonce=[nonce from challenge]&session_key=[explained below]&v=1.0&sig=[calculated as shown below]
For the session key, I send the user a browserfield to Facebook's site. It returns an access token in the form AAA...|BBB...|CCC... where BBB... is the session key
The sig is calculated by taking the following string, md5ing it, and then converting the bytes to a hexadecimal string:
api_key=[my api key]call_id=[time in millis]method=auth.xmpp_loginnonce=[nonce from challenge]session_key=[explained above]v=1.0[secret key appended here]
from there I base64 encode the response, and send:
<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>[Base64EncodedResponse]</response>
Facebook's response is consistently a not-authorized error, with no adidtional explanation. Is there something that is missing or something? Thanks for the help.
