How to create a procedure to change randomly passwords

Question

Hello,
I am trying to create a procedure to change randomly passwords for all users in a database. I need this after the database cloning. I have too many users to alter in a manual way...
Is there any option to create a procedure which will fetch all users in a database and alter them by a random password?
I was not able to find any clue.
Could you help me?
Thanks

Answer 1

Welcome to the forum.
change randomly passwords for all users in a database.All users? Including SYS/SYSTEM? I hope not...
But you could use DBMS_RANDOM.STRING and ALL_USERS and dynamic SQL.
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_random.htm#sthref4675
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_2114.htm#REFRN20302
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14261/dynamic.htm#LNPLS01101
(easy to find when you do a quick search from http://www.oracle.com/pls/db102/homepage or http://www.oracle.com/pls/db112/homepage)
DBMS_RANDOM.STRING can give you a random password easily:
select dbms_random.string('x', 10)
from   dual
connect by level <= 10;Zo you could do something like:
begin
  for rec in ( select t.username
               ,      dbms_random.string('x', 10) new_pass
               from   all_users t
              -- where  t.username not in (...)
              -- or
              -- where  t.username in (...)
  loop
    --execute immediate ' alter user '||rec.username||' identified by '||rec.new_pass;
    dbms_output.put_line ('New password for user '||rec.username||' = '||rec.new_pass);
  end loop;
end;
/You'll have to fill in the where-clause yourself/
I also commented out the dynamic alter user statement, since I'm not sure if you really want to reset the pwd's for all users.
Also, instead of using dbms_output.put_line to check the new passwords, you could insert them in a table or spool the output to a file.