Audit fixes - username equal password

Question

Background: Oracle 11g on Windows environment
I am working on a query that will provide a list all usernames in my system where the username and password are the same. The problem is the passwords are not plan text so the query give zero result.
Is there any other way I can do query this problem?
Example:
SELECT name, user#, password from sys.user$
WHERE name = password;

Answer 1

I found a hard way to resolve my problem.
First I list all username and passwords where username is not equal to NULL.
SELECT name, password from sys.user$ where password != 'NULL';Then use the result in a text file and edit it to look like this:
select count(*) from sys.user$
where (name = 'TSMSYS' and password = '3D951A8B17D0F29F')
or (name = 'CTXSYS' and password = '24AB254B06281B4C')
or (name = 'DBSNMP' and password = 'E066D214D5421CCC')
or (name = 'DIP' and password = 'CE4A36B9636CA59C')
or (name = 'MDSYS' and password = '72971238BAD2AF80')
.I then used the above result to change the password for the affected users.
That got me complaint.