Re: [PATCH] ath9k: Add module parameter to disable hardware crypto

[Jouni Malinen <j@w1.fi>]

On Tue, Feb 24, 2009 at 09:24:32AM -0500, pat-lkml wrote:

> With this patch, and nohwcrypt=1, I get the following in hostapd (this
> system runs as an access point) when I try to associate with a client.
> 
> I can't say whether this is a hostapd problem or an ath9k problem yet,
> but it's a different behavior than with nohwcrypt=0 or without this 
> patch.  With this patch, wpa2 works perfectly, as without it, as well
> as wep working perfectly.  

Are you saying that you get different behavior from hostapd when
comparing nohwcrypt=0 and nohwcrypt=1 (i.e., no changes in the driver
code, just the module parameter change)?

> I wouldn't call this report a 'ACK/NACK' report as it has caused no
> new problems, nor fixed any old problems.  Unfortunately I don't have 
> a log around of the old behavior right now, for comparison.  I just 
> wanted to report what I've found based on this patch.

> wlan0: STA 00:1f:a7:70:2d:8d WPA: sending 1/4 msg of 4-Way Handshake
> wlan0: STA 00:1f:a7:70:2d:8d WPA: EAPOL-Key timeout
> wlan0: STA 00:1f:a7:70:2d:8d WPA: sending 1/4 msg of 4-Way Handshake
> wlan0: STA 00:1f:a7:70:2d:8d WPA: EAPOL-Key timeout
> wlan0: STA 00:1f:a7:70:2d:8d WPA: sending 1/4 msg of 4-Way Handshake
> wlan0: STA 00:1f:a7:70:2d:8d WPA: received EAPOL-Key frame (2/4 Pairwise)
> wlan0: STA 00:1f:a7:70:2d:8d WPA: invalid MIC in msg 2/4 of 4-Way Handshake
> wlan0: STA 00:1f:a7:70:2d:8d WPA: received EAPOL-Key 2/4 Pairwise with unexpected replay counter
> wlan0: STA 00:1f:a7:70:2d:8d WPA: received EAPOL-Key 2/4 Pairwise with unexpected replay counter
> wlan0: STA 00:1f:a7:70:2d:8d WPA: EAPOL-Key timeout

Which client are you using? Are you sure that the passphrase/PSK is set
correctly? The nohwcrypt patch should make absolutely no difference for
this part (this is key handshake which in the initial phase is sent
without encrypted EAPOL-Key frames, so neither sw nor hw crypto used).

-- 
Jouni Malinen                                            PGP id EFC895FA