802.11r: Iinvalid MIC in msg 2/4 of 4-Way Handshake

Ahmad Ali Tabassam ahmadthe8
Tue Jan 20 14:01:32 PST 2009

Hi everyone
I am working on 802.11r, my?initial 802.11r authentication and association is working fine (completed successfully) using the wpa_suppliant-0.6.7 and hostapd-0.6.7. But the 4-way handshake authentication always failed. The AP sends a de-authentication?packet with code 54, before the last message of the 4-way handshake, due to invalid MIC in msg 2/4 of 4-Way Handshake.
Any Idea ??
WPA: Send EAPOL(version=3 secure=0 mic=0 ack=1 install=0 pairwise=8 kde_len=0 keyidx=0 encr=0)
IEEE 802.1X: 121 bytes from 00:1d:0f:f9:22:77
?? IEEE 802.1X: version=1 type=3 length=117
wlan0: STA 00:1d:0f:f9:22:77 WPA: received EAPOL-Key frame (2/4 Pairwise)
WPA: 00:1d:0f:f9:22:77 WPA_PTK entering state PTKCALCNEGOTIATING
FT: PMK-R0 - hexdump(len=32): [REMOVED]
FT: PMKR0Name - hexdump(len=16): 6a 6f b8 ff 07 bf 81 45 12 e3 ff a2 14 08 ae 61
FT: PMK-R1 - hexdump(len=32): [REMOVED]
FT: PMKR1Name - hexdump(len=16): 6f 22 35 14 63 54 cc 6b 33 7d 8f 60 27 b9 ba 9a
FT: PTK - hexdump(len=64): [REMOVED]
FT: PTKName - hexdump(len=16): 55 a9 4c cb c5 4e 87 a5 bc 46 0d 45 83 25 2b 0c
wlan0: STA 00:1d:0f:f9:22:77 WPA: invalid MIC in msg 2/4 of 4-Way Handshake
STA 00:1d:0f:cb:d1:3b sent probe request for broadcast SSID
MGMT (TX callback) ACK
mgmt::proberesp cb
?My settings are: n my client machine (laptop), I running using wpa_suppliant 0.6.7 on Kernel 2.6.29.rc1-wl (wireless-testing) with NIC AR5008: (AR5416+AR2133(D-Link: DWA-643)). I also applied two patches ?userspace_mlme_allow_bssid_mismathc.pathc 08-Jan-2009, vif_conf.patch 08-Jan-2009 and also patched wpa_supplicant with the nl80211.h (provided by Jouni) in order to get the needed nl80211 command for enabling userspace MLME. But on my access point machine (Desktop PC), I am using hostapd- 0.6.7 on Kernel 2.6.28-wl (wireless-testing) with NIC AR5008: (AR5416+AR2133(D-Link: DWA-556)).Best Regards?

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