How can I enable auth in my libvirtd env just like oVirt ?
The main howto file for doing this in general with libvirt is here:
Based on what oVirt 4.3 and 4.4 configure inside the files:
you can map the howto above possible choices with what you want and so mimic oVirt behavior.
If I read correctly the above files, it should be sasl authentication mechanism with DIGEST-MD5 plugin and SCRAM mechanism for both oVirt 4.3 and 4.4