[33669] in Kerberos
AP_REQ Authenticator Checksum
daemon@ATHENA.MIT.EDU (Prashant Batra)
Tue Jul 26 14:52:58 2011
From: Prashant Batra <Prashant.Batra@citrix.com>
To: "kerberos@mit.edu" <kerberos@mit.edu>
Date: Wed, 27 Jul 2011 00:22:46 +0530
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Hi Guys,
Need some help on an AP_REQ packet. I am working on a MAPI client and we use Kerberos for our initial authentication. After successfully getting a TGT and TGS, I am sending an AP_REQ to the server, where I get a DCERPC fault saying - Invalid Checksum.
So I guess that means that the Checksum in my Authenticator is incorrectly formed (actually I am sending a NULL Checksum). Can someone guide me on what this Checksum is supposed to be? Exactly what data is used to compute this checksum? Note that the negotiated encryption type is RC4-HMAC.
All help is appreciated...
Thanks,
Prashant
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