Interface to define how remote credentials are converted into a
JAAS Subject. This interface is used by the RMI Connector Server,
and can be used by other connector servers.
The user-defined authenticator instance is passed to the
connector server in the environment map as the value of the
attribute {@link JMXConnectorServer#AUTHENTICATOR}. For connector
servers that use only this authentication system, if this attribute
is not present or its value is null then no user
authentication will be performed and full access to the methods
exported by the MBeanServerConnection object will be
allowed.
If authentication is successful then an authenticated
{@link Subject subject} filled in with its associated
{@link Principal principals} is returned. Authorization checks
will be then performed based on the given set of principals. | 