Checking Passwords

Is there any way in PL/SQL to check whether the given string (user input) is the password for a particular username?
I need to write a new PL/SQL function with two parameters, say username, password. Here password will be given by user. I need to return TRUE if the password is same. Else FALSE.
Thanks in advance.

Hi,
I do not know if this is a round abt soultion.
Write a Java Program and Load the same in the database. Pass the Password as a Parameter to the Java Prg and try to connect. If connection Fails u'r password does not match.
Hope this helps. [ Call the java prog from Pl/SQL as a External Routine.
Regards,
Ganesh R

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Syntax: xuser [{options}] [action]
xuser     7.7.06   Build 010-123-204-327 (record format version: 3)
Usage: List, clear or setup user specific connection information
Description: This tool is used to predefine and manage default values
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             database without specifying an XUSER key, the key DEFAULT
             is used. Additionally specified command line options
             override the XUSER data.
Options:
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    -V           show version of XUSER program
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XUSER Entry 1
Key         :DEFAULT
Username    :CONTROL
UsernameUCS2:C.O.N.T.R.O.L. . . . . . . . . . . . . . . . . . . . . . . . . .
Password    :?????????
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Isolation   :-1
Charset     :<unspecified>
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Username    :CONTROL
UsernameUCS2:C.O.N.T.R.O.L. . . . . . . . . . . . . . . . . . . . . . . . . .
Password    :?????????
PasswordUCS2:?????????
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Nodename    :prdsap
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Timeout     :0
Isolation   :0
Charset     :<unspecified>
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Key         :c_J2EE
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Password    :?????????
PasswordUCS2:?????????
Dbname      :PRD
Nodename    :prdsap
Sqlmode     :SAPR3
Cachelimit :-1
Timeout     :0
Isolation   :0
Charset     :<unspecified>
XUSER Entry 4
Key         :w
Username    :SUPERDBA
UsernameUCS2:S.U.P.E.R.D.B.A. . . . . . . . . . . . . . . . . . . . . . . . .
Password    :?????????
PasswordUCS2:?????????
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Nodename    :prdsap
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Cachelimit :-1
Timeout     :0
Isolation   :0
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>
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Checking Passwords

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