wpa_supplicant -> EAP-TTLS/PAP, madwifi-ng (Atheros), problem
dcbw at redhat.com
Tue Oct 17 11:42:41 EDT 2006
On Tue, 2006-10-17 at 08:00 -0700, Sam Schinke wrote:
> On Saturday 14 October 2006 07:13, Jouni Malinen wrote:
> > On Fri, Oct 13, 2006 at 04:12:20PM -0700, Sam Schinke wrote:
> > > > On Wed, Oct 11, 2006 at 07:04:45PM +0200, sabx wrote:
> > > > > IE: WPA Version 1
> > > > > Group Cipher : WEP-40
> > > > > Pairwise Ciphers (1) : WEP-40
> > > > > Authentication Suites (1) : 802.1x
> > >
> > > I get the same pairwise cipher on my netgear router which I connect to
> > > using WPA in linux and windows. Or is this cipher suite only invalid in
> > > the context of EAP_TTLS/PAP (etc).
> > Np, that is invalid in any context if WPA is being used. It sounds like
> > there is some kind of bug in either the AP or the client (driver or
> > iwlist).. iwlist (v28) works fine in my tests, so I don't know what is
> > causing this.
> Is there any debugging I can assist with? This is a ndiswrapper Broadcomm 43xx
> wireless laptop connecting to a netgear router.
> This isn't something that would be valid with WPA v 1, which I though was
> designed to re-use as many WEP cryptographic algorithms as possible? I could
> understand it being invalid with WPA v 2 which is supposed to use AES.
WPA1 uses TKIP, which is an algorithm that is designed to reuse as much
_hardware_ on the card as possible, but is not compatible with WEP. The
idea was that, to get better security than WEP, and as a stop-gap
measure, manufacturers only had to update the firmware and driver  of
the card because the TKIP algorithm could use the same silicon
encryption engines that were already on cards. WPA2 with CCMP/AES, on
the other hand, requires hardware changes.
 How many actually did that? I can count on one hand. At least
Cisco did, but not many consumer-level devices ever got updated firmware
because their product cycles are too short and security wasn't a
selling-point for consumers at the time.
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