--
-- crypt() and gen_salt(): extended des
--
SELECT crypt('', '_J9..j2zz');
        crypt         
----------------------
 _J9..j2zzR/nIRDK3pPc
(1 row)

SELECT crypt('foox', '_J9..j2zz');
        crypt         
----------------------
 _J9..j2zzAYKMvO2BYRY
(1 row)

CREATE TABLE ctest (data text, res text, salt text);
INSERT INTO ctest VALUES ('password', '', '');
UPDATE ctest SET salt = gen_salt('xdes', 1001);
UPDATE ctest SET res = crypt(data, salt);
SELECT res = crypt(data, res) AS "worked"
FROM ctest;
 worked 
--------
 t
(1 row)

DROP TABLE ctest;