Unable to setup SASL auth properties

It seems that it's not possible to setup SASL auth properies. This is needed e.g. in case of DIGEST-MD5 authentication - org.jboss.sasl.digest.DigestMD5Server, which handles this auth., expects that properties contain com.sun.security.sasl.digest.realm, otherwise default to server name as realm name. However, it seems that proprties passed to DigestMD5Server are always null. Therefore it's not possible to refer any security realm named other than server name (e.g. standard ApplicationRealm).