[cifs-protocol] Re: 600169 - RE: DCE/RPC PFC_SUPPORT_HEADER_SIGN not optional

Stefan (metze) Metzmacher metze at samba.org
Mon Jul 28 10:44:38 GMT 2008

Andrew Bartlett schrieb:
> On Fri, 2008-07-25 at 11:43 -0700, Richard Guthrie wrote:
>> Andrew,
>> I will be working to resolve your issue.  Would it be possible to have you capture and send us a network trace that captures the behavior you are seeing?

Some comments about stuff I found while doing some tests as a 'client'
against a windows server:

> Samba4 seems to send a valid request using the current heimdal
> AES implementation, I'm not getting an DCERPC fault back.
> But it seems the server always sends back the response with AEAD
> and we can't handle the response.

> Also when I send the DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN flag in the
> DCERPC Bind, then I'm getting DCERPC faults using rc4 and des keys.

This seems to imply that windows always do AEAD for AES, but accept
client without out it, but also imply this client would be able to
handle the reply using AEAD.


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