User propagation with XML/SOAP RPC Server

Hello experts,
Is it possible to somehow propagate user identification with the XML/SOAP RPC Server?
What I’d like to do is to propagate either the RPC authentication or the EntireX authentication information.
At a minimum the user id, better yet the password or security token as well.
The propagation could occur as the basic HTTP authentication, as HTTP header parameters, or in the SOAP header.

I’ve already looked into using the Java API for XML/SOAP RPC Server. Unfortunately the XMLRPCServerInterface is very limited and doesn’t provide any additional functionality.
Also the user and password information for basic HTTP authentication is a static configuration entry in the configuration file.

Thanks for any hints

Currently only the static definition for basic HTTP authentication is possible.

For dynamic propagation you should submit a proposal in Brainstorm.