hostapd and GTK handshake?

Andrea G Forte andreaf at cs.columbia.edu
Tue Feb 7 16:01:55 EST 2006


I got the answer about the GTK handshake from the wpa_supplicant page:

"WPA2 has integrated the initial Group Key Handshake into the 4-Way 
Handshake."

I should have done more reading before posting. Sorry about this.
The "mistery" about the meaning of the other strings still remains. ;)

-Andrea


Andrea G Forte wrote:

>Hi all.
>
>I have noticed a few things while working on EAP-TSL with hostapd, 
>wpa_supplicant (both using hostap driver) and external RADIUS server.
>One is that if I look at the trace of the message exchange, after the 
>EAP Success frame, at the end of the authentication process, I see four 
>EAPOL key frames (and then encrypted data). Now, these last four frames 
>should be for the PTK. What I do not see are the EAPOL frames for the 
>GTK which should be right after the ones for PTK. On the hostapd output, 
>however, it says GROUP_HANDSHAKE --> COMPLETED which makes me think that 
>everything worked just fine, but then, where are the EAPOL frames for this?
>
>On a more silly matter, after the authentication has completed 
>successfully on the output of hostapd I see:
>EAPOL: startWhen --> 0
>
>and after some time:
>EAPOL: authWhile --> 0
>EAPOL: idleWhile --> 0
>
>What is their meaning?
>
>Thanks a lot,
>Andrea
>
>P.S.
>I am using CCMP
>
>
>
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