UsernameToken authentication with the *nix account credentials

Ever wondered how we can enable users of a Linux box to authenticate against a web service?

Apache Rampart can be used with JPam to easily set this up. You can simply set up UsernameToken authentication (policy/sample01 in the Apache Rampart distro) and use this callback handler implementation to authenticate against PAM. Make sure you follow the instruction in INSTALL.txt in JPam distribution to set up JPam before using the callback handler.