From c29475a9326a2d88f7a41fcc1a2db2895b363a03 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Fri, 25 Aug 2017 21:14:02 +0300 Subject: [PATCH] tests: Delayed EAPOL-Key msg 3/4 replaying attack This hits the new wpa_supplicant code path that rejects reconfiguration of the same GTK. Signed-off-by: Jouni Malinen --- tests/hwsim/test_ap_psk.py | 75 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/tests/hwsim/test_ap_psk.py b/tests/hwsim/test_ap_psk.py index 67f6d7403..417a59689 100644 --- a/tests/hwsim/test_ap_psk.py +++ b/tests/hwsim/test_ap_psk.py @@ -577,6 +577,81 @@ def test_ap_wpa2_psk_ext_retry_msg_3(dev, apdev): hwsim_utils.test_connectivity(dev[0], hapd) +def test_ap_wpa2_psk_ext_retry_msg_3b(dev, apdev): + """WPA2-PSK AP using external EAPOL I/O and retry for EAPOL-Key msg 3/4 (b)""" + bssid = apdev[0]['bssid'] + ssid = "test-wpa2-psk" + passphrase = 'qwertyuiop' + psk = '602e323e077bc63bd80307ef4745b754b0ae0a925c2638ecd13a794b9527b9e6' + params = hostapd.wpa2_params(ssid=ssid) + params['wpa_psk'] = psk + hapd = hostapd.add_ap(apdev[0], params) + hapd.request("SET ext_eapol_frame_io 1") + dev[0].request("SET ext_eapol_frame_io 1") + dev[0].connect(ssid, psk=passphrase, scan_freq="2412", wait_connect=False) + addr = dev[0].p2p_interface_addr() + + # EAPOL-Key msg 1/4 + ev = hapd.wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from hostapd") + res = dev[0].request("EAPOL_RX " + bssid + " " + ev.split(' ')[2]) + if "OK" not in res: + raise Exception("EAPOL_RX to wpa_supplicant failed") + + # EAPOL-Key msg 2/4 + ev = dev[0].wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from wpa_supplicant") + res = hapd.request("EAPOL_RX " + addr + " " + ev.split(' ')[2]) + if "OK" not in res: + raise Exception("EAPOL_RX to hostapd failed") + + # EAPOL-Key msg 3/4 + ev = hapd.wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from hostapd") + # Do not send the first msg 3/4 to the STA yet; wait for retransmission + # from AP. + msg3_1 = ev + + # EAPOL-Key msg 3/4 (retry) + ev = hapd.wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from hostapd") + msg3_2 = ev + + # Send the first msg 3/4 to STA + res = dev[0].request("EAPOL_RX " + bssid + " " + msg3_1.split(' ')[2]) + if "OK" not in res: + raise Exception("EAPOL_RX to wpa_supplicant failed") + + # EAPOL-Key msg 4/4 + ev = dev[0].wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from wpa_supplicant") + res = hapd.request("EAPOL_RX " + addr + " " + ev.split(' ')[2]) + if "OK" not in res: + raise Exception("EAPOL_RX to hostapd failed") + dev[0].wait_connected(timeout=15) + ev = hapd.wait_event(["AP-STA-CONNECTED"], timeout=15) + if ev is None: + raise Exception("Timeout on AP-STA-CONNECTED from hostapd") + + hwsim_utils.test_connectivity(dev[0], hapd) + + # Send the second msg 3/4 to STA + res = dev[0].request("EAPOL_RX " + bssid + " " + msg3_2.split(' ')[2]) + if "OK" not in res: + raise Exception("EAPOL_RX to wpa_supplicant failed") + # EAPOL-Key msg 4/4 + ev = dev[0].wait_event(["EAPOL-TX"], timeout=15) + if ev is None: + raise Exception("Timeout on EAPOL-TX from wpa_supplicant") + # Do not send the second msg 4/4 to the AP + + hwsim_utils.test_connectivity(dev[0], hapd) + def parse_eapol(data): (version, type, length) = struct.unpack('>BBH', data[0:4]) payload = data[4:]