org.mobicents.servlet.sip.catalina.security.authentication.MessageDigestResponseAlgorithm only support MD5 , but as rfc7616 say :
An optional header field allows the server to specify the algorithm
used to create the unkeyed digest or digest. This document adds
SHA-256 and SHA-512/256 algorithms. To maintain backwards
compatibility with [RFC2617], the MD5 algorithm is still supported
but NOT RECOMMENDED.
https://tools.ietf.org/html/rfc7616