+### Standalone operations on public keys.
+
+bin_SCRIPTS += pubkeyop
+EXTRA_DIST += pubkeyop.in
+CLEANFILES += pubkeyop
+pubkeyop: pubkeyop.in Makefile
+ $(SUBST) $(srcdir)/pubkeyop.in $(SUBSTVARS) >pubkeyop.new && \
+ chmod +x pubkeyop.new && mv pubkeyop.new pubkeyop
+
+###--------------------------------------------------------------------------