Re: Problem authenticating using WPA with bcm43xx-softmac

[Johannes Berg <johannes@sipsolutions.net>]

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On Wed, 2006-06-07 at 10:47 -0500, Larry Finger wrote:

> I have a little more information on what is happening. 

Great.

> In IEEE Std 802.11i-2004, which defines the 
> WPA protocol, Figure 11a shows the sequence of exchanges needed to associate. Both bcm43xx-softmac 
> and ndiswrapper go through the "Open System Authentication" process. 

Right, you always have to do that.

> Where they seem to diverge is 
> in the STA's "Association Request (Security Parameters)" step. With ndiswrapper, the AP responds 
> with a WPA EAPOL-Key message; whereas with softmac, the AP sends back the "invalid pairwise cipher 
> message" and rejects the association.

Interesting. That's strange.

> Can anyone point to a reference that states what the content of the Association Request should be to 
> get the AP to respond with the EAPOL-Key message? Unfortunately, I have no possibility of 
> implementing a sniffer to see what a "correct" message contains.

Well, it should be shown in the 802.11i spec too.

johannes

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