--
-- crypt() and gen_salt(): crypt-des
--
select crypt('', 'NB');
     crypt     
---------------
 NBPx/38Y48kHg
(1 row)

select crypt('foox', 'NB');
     crypt     
---------------
 NB53EGGqrrb5E
(1 row)

create table ctest (data text, res text, salt text);
insert into ctest values ('password', '', '');
update ctest set salt = gen_salt('des');
update ctest set res = crypt(data, salt);
select res = crypt(data, res) as "worked" from ctest;
 worked 
--------
 t
(1 row)

drop table ctest;