Works at least without crypto.

[userv-utils] / finger / finger-getprefs.in

#
if ( grep calling-user-shell /etc/shells
   & glob service-user daemon
   )
        reset
        no-set-environment
        suppress-args
        disconnect-hup
        execute sh -c "                                                         \
                if test -f @varfinger@/prefs; then                              \
                grep '^$USERV_USER ' @varfinger/prefs || test $? = 1; fi        \
        "
fi