How to get CLIENT Username

Hi Experts,
I have a problem in retrieving my client's computer name and its username using windows api..
Coz my program is using JNI so for the windowsAPI i used GetUserName and Get ComputerName --> It gives me the username and the computer name of the server..
Any idea how to get another (computer username and its computer name PASSWORD IF POSSIBLE) that logon to my server.
Any suggestion will be highly appreciated..
Thank you
Suwandy

Any idea how to get another (computer username and its
computer name PASSWORD IF POSSIBLE) that logon to my
server.
High hopes
What are your clients?
Java,jsp,html or are they servlets
-Regards
Manikantan

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Edited by: Ricky Ru on Oct 9, 2011 1:50 AM

Thanks EJP.
I have made some progress on this. But I have met another issue.
*1) Using JAAS to login.*
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Debug is true storeKey false useTicketCache true useKeyTab false doNotPrompt false ticketCache is null isInitiator true KeyTab is null refreshKrb5Config is false principal is null tryFirstPass is false useFirstPass is false storePass is false clearPass is false
Acquire TGT from Cache
Principal is [email protected]
Commit Succeeded
javax.naming.AuthenticationException: GSSAPI [Root exception is javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Integrity check on decrypted field failed (31))]]
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     at com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:214)
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     at sun.security.krb5.internal.TGSRep.init(TGSRep.java:58)
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     at sun.security.krb5.KrbTgsRep.<init>(KrbTgsRep.java:46)
     ... 25 more
Do you have any clue on this? Thanks.

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