Authentication of eJabberd with Netegrity Siteminder

Hi,

I'm currently trying to develop a PHP-based eJabberd client (based on JWChat) for my organisation. Here, we use Siteminder to implement SSO Login for our web-based applications. IN the backend, I'm using a clustered set-up via HTTP-Bind.

Does anyone know of any way to do SSO login for eJabberd's HTTP-Bind?
THanks for any suggestions in adavance!