[28204] in Kerberos
Re: Wrong ticket encryption for W2K clients only
daemon@ATHENA.MIT.EDU (Douglas E. Engert)
Mon Aug 6 10:22:39 2007
Message-ID: <46B72E90.7070502@anl.gov>
Date: Mon, 06 Aug 2007 09:22:08 -0500
From: "Douglas E. Engert" <deengert@anl.gov>
MIME-Version: 1.0
To: Ron Perzul <rperzul@businessobjects.com>
In-Reply-To: <D8517328071C7A48BAA4DE1799D0DE4322B849@exch-lv05.intl.businessobjects.com>
Cc: kerberos@mit.edu
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Looks like two different principals, and accounts in AD. Can you search AD
for the servicePrincipalNames of HTTP/server.eu.xxx.com and HTTP/server
and then look at the accounts.
Ron Perzul wrote:
> Hi,
>
> I am facing the following problem.
>
> The Windows service account used for Vintela SSO is set up using "Use DES encryption for this account". The keytab is created with ktpass ... -crypto DES-CBC-MD5 encryption.
>
> Everything is working when I login to the web application from a Windows 2003 server machine. On the Windows 2003 server machine part of the klist tickets command is as follows (Kerberos ticket encryption of type DES-CBC-MD5 as expected):
>
> Server: HTTP/server.eu.xxx.com@EU.XXX.COM
> KerbTicket Encryption Type: Kerberos DES-CBC-MD5
> End Time: 8/3/2007 21:38:37
> Renew Time: 8/10/2007 11:38:37
>
> But on the Windows 2000 clients the ticket is encrypted with RC4-HMAC-NT:
>
> Server: HTTP/server@EU.XXX.COM
> KerbTicket Encryption Type: Kerberos RSADSI RC4-HMAC(NT)
> End Time: 8/3/2007 21:42:55
> Renew Time: 8/10/2007 11:42:55
>
> The wrong obtained ticket causes SSO to fail.
>
> Tomcat output is:
>
> HTTP Status 500 - com.wedgetail.idm.sso.ProtocolException: com.wedgetail.idm.spnego.server.SpnegoException: GSSException: Failure unspecified at GSS-API level (Mechanism level: com.dstc.security.kerberos.KerberosException: Successfully matched service principal " HTTP/SERVER.EU.XXX.COM@EU.XXX.COM but not key type (23) + KVNO (2) in this entry: Principal: HTTP/SERVER.EU.XXX.COM@EU.XXX.COM Type: 1 TimeStamp: Wed Dec 31 19:00:00 EST 1969 KVNO: -1 Key: [3, 67 ec a8 a8 75 e0 ab 3e ] )
>
> So the encryption type of the client ticket (which is of type 23=RC4-HMAC-NT) does not match the entry in the keytab (type 3=DES-CBC-MD5).
>
> Why does the Windows 2000 machine get a different encrypted ticket? Also, there is a difference in the SPN returned in the output of the klist tickets above.
>
> Any help would be greatly appreciated.
>
> Thanks,
>
> Ron
>
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>
>
--
Douglas E. Engert <DEEngert@anl.gov>
Argonne National Laboratory
9700 South Cass Avenue
Argonne, Illinois 60439
(630) 252-5444
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