Max SMB signing key length
Christopher R. Hertel
crh at samba.org
Thu Mar 18 13:12:24 MDT 2010
Did you check the Microsoft docs on this? If it's not specified, then it
should be entered as a bug against the docs. This is exactly the kind of
thing that Microsoft is *actually pro-actively looking* to fix.
:)
...in fact, it should be in the doc I wrote, probably in section 3. The
latest version of [MS-CIFS] should be on the Microsoft website soon, if not
already.
Chris -)-----
...who has written so much that there's just not enough room in his brain to
remember it all.
Stefan (metze) Metzmacher wrote:
> Hi Andrew,
>
> do you know what the maximum length of the SMB signing key could be?
>
> I know with extended security (NTLMSSP 16 bytes or krb5 8-32 bytes)
> it's easy.
>
> But without extended security we calculate the signing key
> out of the user_session_key and the nt or lm response blob.
> I assume the user_session_key is always 16 byte, but what is the max
> size of the response blob?
>
> metze
>
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