It gets worse...

[Christopher R. Hertel]

Ahh...

>From the message Jeremy referenced:

  "It's believed that HMAC is secure against this attack (according to
  Hugo Krawczyk, the designer) so the modern MAC functions should all be
  secure."

...so the MAC signing piece appears to be safe.

Chris -)-----

-- 
"Implementing CIFS - the Common Internet FileSystem" ISBN: 013047116X
Samba Team -- http://www.samba.org/     -)-----   Christopher R. Hertel
jCIFS Team -- http://jcifs.samba.org/   -)-----   ubiqx development, uninq.
ubiqx Team -- http://www.ubiqx.org/     -)-----   crh at ubiqx.mn.org
OnLineBook -- http://ubiqx.org/cifs/    -)-----   crh at ubiqx.org