Circumference is an implementation of a WebAuth client and server to supplement the recently-written specification for the WebAuth Diameter Application, complete with an extensible Diameter server and base library. Diameter is specified in RFC3588 and its updates.
You can download it from the following link: https://packetstormsecurity.com/files/download/71319/circumference-1.0.tar.bz2
Source: https://packetstormsecurity.com/files/71319/circumference-1.0.tar.bz2.html