Vista CFX join and 'out of order' GSSAPI messages

Andrew Bartlett abartlet at
Thu Jul 24 21:34:16 GMT 2008

On Thu, 2008-07-24 at 13:52 -0400, Jeffrey Altman wrote:
> To the best of my knowledge Microsoft does not support out of order
> delivery of messaging. 

The issue here is incorrect computation of the sequence number, and the
crypto state, when using DCE_STYLE.  The problem here is that the first
wrapped packet from the Vista client has a 'wrong' sequence number.  

(The checksum failure might actually be due to AEAD - need to look into
how this works with CFX compared with arcfour). 

Andrew Bartlett

Andrew Bartlett
Authentication Developer, Samba Team 
Samba Developer, Red Hat Inc.
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