--- /dev/null
+CREATE OR REPLACE FUNCTION hkey( text ) RETURNS text\r
+AS\r
+ 'hkey.so', 'hkey'\r
+LANGUAGE C STRICT IMMUTABLE;\r
+\r
+REVOKE ALL ON FUNCTION hkey( TEXT ) FROM PUBLIC;\r
+GRANT EXECUTE ON FUNCTION hkey( TEXT ) TO admins;
\ No newline at end of file