[cifs-protocol] Protocol changes in KB2992611 [115012312316449]

Andrew Bartlett abartlet at samba.org
Mon Feb 2 19:41:54 MST 2015

On Tue, 2015-01-27 at 15:55 +1300, Andrew Bartlett wrote:
> I've got into our server with the (presumably) failing packet.  The
> client appears to have started requiring that BACKUPKEY_BACKUP_GUID, ie
> the ServerWrap protocol 7f752b10-178e-11d1-ab8f-00805f14db40 actually
> work (we do not implement it yet). 
> Before this update, the client is happy for this to fail, now it
> persists with continuing to contact the server, and having this
> operation fail.  This repeats and repeats.
> I'm also quite curious as to why an update in 2014 is moving clients to
> require use of the RC4 based protocol, given all the bad press that
> cyrpto had got.  This failure is just after a successful call to the
> ClientWrap protocol, which should be much better.
> I await your thoughts,

Any news on this?  I'm planning on making an implementation of the
ServerWrap protocol, but it would help to know what actually changed, so
I know if this is likely to help.


Andrew Bartlett
Andrew Bartlett
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

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