providers/proxy/proxy_iface.xml

<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
    <interface name="org.freedesktop.sssd.ProxyChild.Client">
        <annotation value="iface_proxy_client" name="org.freedesktop.DBus.GLib.CSymbol"/>
        <method name="Register">
            <arg name="ID" type="u" direction="in" />
        </method>
    </interface>

    <interface name="org.freedesktop.sssd.ProxyChild.Auth">
        <annotation value="iface_proxy_auth" name="org.freedesktop.DBus.GLib.CSymbol"/>
        <method name="PAM">
            <annotation name="org.freedesktop.sssd.RawHandler" value="true"/>
        </method>
    </interface>
</node>