hostapd / ath9k 4-way handshake fail

Masashi Honma honma at ictec.co.jp
Tue Jul 14 22:47:39 EDT 2009


> I expected both PSKs to be the same.

Yes, I think they should be identical.

Can you send full debug message of hostapd and wpa_supplicant ?

Or can you try Debian sid + linux-2.6.31-rc1 + newest hostapd on GIT ?
I could build AP with this set on 2009/6/29.
I'm using NEC WL300NC-G(similar type number of your card, but defferent chipset).

Regards,
Masashi Honma.

Hector Akamine wrote:
> Hi,
> 
>>> I wanted to compare PMK,PTK in hostapd and wpa_supplicant but messages show
>>> "[REMOVED]" instead of the keys. Is it possible to configure them to show the 
>>> keys?
>> You can use "-K" option.
> 
> Masashi, thank you for the tip.
> 
> 
> Taking a look at the debug messages, I found that hostapd and wpa_supplicant 
> create different PSKs from the same SSID and passphrase (so the PMK PTK
> calculated later are different):
> 
> hostapd log (excerpt):
> 
> Using interface wlan1 with hwaddr 00:0d:02:3b:0a:96 and ssid 'hostapdAP-sta001'
> 
> SSID - hexdump_ascii(len=16):
>      68 6f 73 74 61 70 64 41 50 2d 73 74 61 30 30 31   hostapdAP-sta001
> PSK (ASCII passphrase) - hexdump_ascii(len=10):
>      73 74 61 30 30 31 70 61 73 73                     sta001pass      
> PSK (from passphrase) - hexdump(len=32): 18 40 0d 03 5a e6 b7 db b0 bf ca cd 
> b9 de 38 59 ba 9f d0 99 2d 35 6e a6 73 3b f0 e2 26 2e 8e 18
> WPA: group state machine entering state GTK_INIT (VLAN-ID 0)
> 
> 
> wpa_supplicant log (excerpt) :
> 
> Line: 9 - start of a new network block
> ssid - hexdump_ascii(len=16):
>      68 6f 73 74 61 70 64 41 50 2d 73 74 61 30 30 31   hostapdAP-sta001
> proto: 0x1
> key_mgmt: 0x2
> pairwise: 0x8
> group: 0x8
> PSK (ASCII passphrase) - hexdump_ascii(len=10):
>      73 74 61 30 30 31 70 61 73 73                     sta001pass      
> PSK (from passphrase) - hexdump(len=32): 53 55 0b 81 d4 d3 a1 74 06 17 7d 3a
>  07 fe bc c9 0d 48 ea 0b 03 5a fd a2 5f d3 bd 80 f7 ce da 78
> 
> I expected both PSKs to be the same.
> Isn't the PSK only dependent on the passphrase and the SSID? 
> 
> 
> Best regards,
> Hector
> 
> 
> 
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