[SR-Users] diameter auth with round trip

Hello all, we are working on a SIP solution using Kamailio. We want to secure our base of user credentials even in case of attack on the SIP server, and for that reason we plan to use diameter authentication as described in RFC http://www.rfc-base.org/txt/rfc-4740.txt Paragraph 6.2 describes a mode where the HSS answer with code DIAMETER_MULTI_ROUND_AUTH ,and then validate user credential after a second round trip. This does NOT corresponds to what is done on Kamailio module ims_auth, where credentials (actually a hash of the credentials, but its enough to authenticate ) ) are pushed to kamailio, which does the computation of the expected answer (which corresponds to par 6.3 of the RFC 4740) Is there any kamailio module that would allow to use the method with DIAMETER_MULTI_ROUND_AUTH ? Thank you JB