pmk caching problem

권정호 jkwon at ain.knu.ac.kr
Thu Nov 16 09:40:20 EST 2006


Hi all,

 

I don’t know why it cannot skip ieee 802.1X/EAP procedure.

I’m currently using hostapd-0.5.5 as an AP and windows xp as a mobile node.

Actually, the hostapd found a mobile node’s pmkid in its cache entry, then
sent 1/4 msg of 4-way handshake.

However, a mobile node sent EAPOL-Start, not 2/4 msg of 4-way handshake as
a reply.

Please reply to my question ASAP.

 

Thank you in advance.

 

 

RSN IE: STA PMKID - hexdump(len=16): 32 ed bc f4 8e 37 00 69 00 c4 e5 f2 8c
29 75 fb

ath0: STA 00:13:02:15:75:46 WPA: PMKID found from PMKSA cache

ath0: STA 00:13:02:15:75:46 WPA: event 1 notification

madwifi_del_key: addr=00:13:02:15:75:46 key_idx=0

ath0: STA 00:13:02:15:75:46 IEEE 802.1X: start authentication

IEEE 802.1X: 00:13:02:15:75:46 AUTH_PAE entering state INITIALIZE

IEEE 802.1X: 00:13:02:15:75:46 BE_AUTH entering state INITIALIZE

IEEE 802.1X: 00:13:02:15:75:46 REAUTH_TIMER entering state INITIALIZE

IEEE 802.1X: 00:13:02:15:75:46 AUTH_KEY_TX entering state NO_KEY_TRANSMIT

IEEE 802.1X: 00:13:02:15:75:46 KEY_RX entering state NO_KEY_RECEIVE

IEEE 802.1X: 00:13:02:15:75:46 CTRL_DIR entering state IN_OR_BOTH

IEEE 802.1X: 00:13:02:15:75:46 AUTH_PAE entering state INITIALIZE

IEEE 802.1X: 00:13:02:15:75:46 BE_AUTH entering state IDLE

IEEE 802.1X: 00:13:02:15:75:46 KEY_RX entering state NO_KEY_RECEIVE

IEEE 802.1X: 00:13:02:15:75:46 CTRL_DIR entering state FORCE_BOTH

IEEE 802.1X: 00:13:02:15:75:46 AUTH_PAE entering state INITIALIZE

IEEE 802.1X: 00:13:02:15:75:46 KEY_RX entering state NO_KEY_RECEIVE

ath0: STA 00:13:02:15:75:46 IEEE 802.1X: PMK from PMKSA cache - skip IEEE
802.1X/EAP

STA identity from PMKSA - hexdump_ascii(len=10):

     4d 6f 62 69 6c 65 4e 6f 64 65                     MobileNode

ath0: STA 00:13:02:15:75:46 WPA: start authentication

WPA: 00:13:02:15:75:46 WPA_PTK entering state INITIALIZE

madwifi_del_key: addr=00:13:02:15:75:46 key_idx=0

WPA: 00:13:02:15:75:46 WPA_PTK_GROUP entering state IDLE

WPA: 00:13:02:15:75:46 WPA_PTK entering state AUTHENTICATION

WPA: 00:13:02:15:75:46 WPA_PTK entering state AUTHENTICATION2

WPA: 00:13:02:15:75:46 WPA_PTK entering state INITPMK

WPA: PMK from PMKSA cache

WPA: 00:13:02:15:75:46 WPA_PTK entering state PTKSTART

ath0: STA 00:13:02:15:75:46 WPA: sending 1/4 msg of 4-Way Handshake

WPA: Send EAPOL(secure=0 mic=0 ack=1 install=0 pairwise=8 ie_len=22
gtk_len=0 keyidx=0 encr=0)

IEEE 802.1X: 00:13:02:15:75:46 BE_AUTH entering state IDLE

IEEE 802.1X: 5 bytes from 00:13:02:15:75:46

   IEEE 802.1X: version=1 type=1 length=0

   ignoring 1 extra octets after IEEE 802.1X packet

ath0: STA 00:13:02:15:75:46 IEEE 802.1X: received EAPOL-Start from STA

ath0: STA 00:13:02:15:75:46 WPA: cached PMKSA available - ignore it since
STA sent EAPOL-Start

ath0: STA 00:13:02:15:75:46 WPA: event 5 notification

 

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