mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-25 08:48:31 -05:00
325 lines
13 KiB
Python
325 lines
13 KiB
Python
# Scanning tests
|
|
# Copyright (c) 2013, Jouni Malinen <j@w1.fi>
|
|
#
|
|
# This software may be distributed under the terms of the BSD license.
|
|
# See README for more details.
|
|
|
|
import time
|
|
import logging
|
|
logger = logging.getLogger()
|
|
import os
|
|
import subprocess
|
|
|
|
import hostapd
|
|
|
|
def check_scan(dev, params, other_started=False):
|
|
if not other_started:
|
|
dev.dump_monitor()
|
|
id = dev.request("SCAN " + params)
|
|
if "FAIL" in id:
|
|
raise Exception("Failed to start scan")
|
|
id = int(id)
|
|
|
|
if other_started:
|
|
ev = dev.wait_event(["CTRL-EVENT-SCAN-STARTED"])
|
|
if ev is None:
|
|
raise Exception("Other scan did not start")
|
|
if "id=" + str(id) in ev:
|
|
raise Exception("Own scan id unexpectedly included in start event")
|
|
|
|
ev = dev.wait_event(["CTRL-EVENT-SCAN-RESULTS"])
|
|
if ev is None:
|
|
raise Exception("Other scan did not complete")
|
|
if "id=" + str(id) in ev:
|
|
raise Exception("Own scan id unexpectedly included in completed event")
|
|
|
|
ev = dev.wait_event(["CTRL-EVENT-SCAN-STARTED"])
|
|
if ev is None:
|
|
raise Exception("Scan did not start")
|
|
if "id=" + str(id) not in ev:
|
|
raise Exception("Scan id not included in start event")
|
|
|
|
ev = dev.wait_event(["CTRL-EVENT-SCAN-RESULTS"])
|
|
if ev is None:
|
|
raise Exception("Scan did not complete")
|
|
if "id=" + str(id) not in ev:
|
|
raise Exception("Scan id not included in completed event")
|
|
|
|
def check_scan_retry(dev, params, bssid):
|
|
for i in range(0, 5):
|
|
check_scan(dev, "freq=2412-2462,5180 use_id=1")
|
|
if int(dev.get_bss(bssid)['age']) <= 1:
|
|
return
|
|
raise Exception("Unexpectedly old BSS entry")
|
|
|
|
def test_scan(dev, apdev):
|
|
"""Control interface behavior on scan parameters"""
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
|
|
logger.info("Full scan")
|
|
check_scan(dev[0], "use_id=1")
|
|
|
|
logger.info("Limited channel scan")
|
|
check_scan_retry(dev[0], "freq=2412-2462,5180 use_id=1", bssid)
|
|
|
|
# wait long enough to allow next scans to be verified not to find the AP
|
|
time.sleep(2)
|
|
|
|
logger.info("Passive single-channel scan")
|
|
check_scan(dev[0], "freq=2457 passive=1 use_id=1")
|
|
logger.info("Active single-channel scan")
|
|
check_scan(dev[0], "freq=2452 passive=0 use_id=1")
|
|
if int(dev[0].get_bss(bssid)['age']) < 2:
|
|
raise Exception("Unexpectedly updated BSS entry")
|
|
|
|
logger.info("Active single-channel scan on AP's operating channel")
|
|
check_scan_retry(dev[0], "freq=2412 passive=0 use_id=1", bssid)
|
|
|
|
def test_scan_only(dev, apdev):
|
|
"""Control interface behavior on scan parameters with type=only"""
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
|
|
logger.info("Full scan")
|
|
check_scan(dev[0], "type=only use_id=1")
|
|
|
|
logger.info("Limited channel scan")
|
|
check_scan_retry(dev[0], "type=only freq=2412-2462,5180 use_id=1", bssid)
|
|
|
|
# wait long enough to allow next scans to be verified not to find the AP
|
|
time.sleep(2)
|
|
|
|
logger.info("Passive single-channel scan")
|
|
check_scan(dev[0], "type=only freq=2457 passive=1 use_id=1")
|
|
logger.info("Active single-channel scan")
|
|
check_scan(dev[0], "type=only freq=2452 passive=0 use_id=1")
|
|
if int(dev[0].get_bss(bssid)['age']) < 2:
|
|
raise Exception("Unexpectedly updated BSS entry")
|
|
|
|
logger.info("Active single-channel scan on AP's operating channel")
|
|
check_scan_retry(dev[0], "type=only freq=2412 passive=0 use_id=1", bssid)
|
|
|
|
def test_scan_external_trigger(dev, apdev):
|
|
"""Avoid operations during externally triggered scan"""
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
subprocess.call(['sudo', 'iw', dev[0].ifname, 'scan', 'trigger'])
|
|
check_scan(dev[0], "use_id=1", other_started=True)
|
|
|
|
def test_scan_bss_expiration_count(dev, apdev):
|
|
"""BSS entry expiration based on scan results without match"""
|
|
if "FAIL" not in dev[0].request("BSS_EXPIRE_COUNT 0"):
|
|
raise Exception("Invalid BSS_EXPIRE_COUNT accepted")
|
|
if "OK" not in dev[0].request("BSS_EXPIRE_COUNT 2"):
|
|
raise Exception("BSS_EXPIRE_COUNT failed")
|
|
hapd = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
dev[0].scan(freq="2412", only_new=True)
|
|
if bssid not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not found in initial scan")
|
|
hapd.request("DISABLE")
|
|
dev[0].scan(freq="2412", only_new=True)
|
|
if bssid not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not found in first scan without match")
|
|
dev[0].scan(freq="2412", only_new=True)
|
|
if bssid in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS found after two scans without match")
|
|
|
|
def test_scan_bss_expiration_age(dev, apdev):
|
|
"""BSS entry expiration based on age"""
|
|
try:
|
|
if "FAIL" not in dev[0].request("BSS_EXPIRE_AGE COUNT 9"):
|
|
raise Exception("Invalid BSS_EXPIRE_AGE accepted")
|
|
if "OK" not in dev[0].request("BSS_EXPIRE_AGE 10"):
|
|
raise Exception("BSS_EXPIRE_AGE failed")
|
|
hapd = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
dev[0].scan(freq="2412")
|
|
if bssid not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not found in initial scan")
|
|
hapd.request("DISABLE")
|
|
logger.info("Waiting for BSS entry to expire")
|
|
time.sleep(7)
|
|
if bssid not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS expired too quickly")
|
|
ev = dev[0].wait_event(["CTRL-EVENT-BSS-REMOVED"], timeout=15)
|
|
if ev is None:
|
|
raise Exception("BSS entry expiration timed out")
|
|
if bssid in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not removed after expiration time")
|
|
finally:
|
|
dev[0].request("BSS_EXPIRE_AGE 180")
|
|
|
|
def test_scan_filter(dev, apdev):
|
|
"""Filter scan results based on SSID"""
|
|
try:
|
|
if "OK" not in dev[0].request("SET filter_ssids 1"):
|
|
raise Exception("SET failed")
|
|
dev[0].connect("test-scan", key_mgmt="NONE", only_add_network=True)
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
hostapd.add_ap(apdev[1]['ifname'], { "ssid": "test-scan2" })
|
|
bssid2 = apdev[1]['bssid']
|
|
dev[0].scan(freq="2412", only_new=True)
|
|
if bssid not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not found in scan results")
|
|
if bssid2 in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("Unexpected BSS found in scan results")
|
|
finally:
|
|
dev[0].request("SET filter_ssids 0")
|
|
|
|
def test_scan_int(dev, apdev):
|
|
"""scan interval configuration"""
|
|
try:
|
|
if "FAIL" not in dev[0].request("SCAN_INTERVAL -1"):
|
|
raise Exception("Accepted invalid scan interval")
|
|
if "OK" not in dev[0].request("SCAN_INTERVAL 1"):
|
|
raise Exception("Failed to set scan interval")
|
|
dev[0].connect("not-used", key_mgmt="NONE", scan_freq="2412",
|
|
wait_connect=False)
|
|
times = {}
|
|
for i in range(0, 3):
|
|
logger.info("Waiting for scan to start")
|
|
start = os.times()[4]
|
|
ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"], timeout=5)
|
|
if ev is None:
|
|
raise Exception("did not start a scan")
|
|
stop = os.times()[4]
|
|
times[i] = stop - start
|
|
logger.info("Waiting for scan to complete")
|
|
ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], 10)
|
|
if ev is None:
|
|
raise Exception("did not complete a scan")
|
|
print times
|
|
if times[0] > 1 or times[1] < 0.5 or times[1] > 1.5 or times[2] < 0.5 or times[2] > 1.5:
|
|
raise Exception("Unexpected scan timing: " + str(times))
|
|
finally:
|
|
dev[0].request("SCAN_INTERVAL 5")
|
|
|
|
def test_scan_bss_operations(dev, apdev):
|
|
"""Control interface behavior on BSS parameters"""
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
|
|
bssid = apdev[0]['bssid']
|
|
hostapd.add_ap(apdev[1]['ifname'], { "ssid": "test2-scan" })
|
|
bssid2 = apdev[1]['bssid']
|
|
|
|
dev[0].scan(freq="2412")
|
|
dev[0].scan(freq="2412")
|
|
dev[0].scan(freq="2412")
|
|
|
|
id1 = dev[0].request("BSS FIRST MASK=0x1").splitlines()[0].split('=')[1]
|
|
id2 = dev[0].request("BSS LAST MASK=0x1").splitlines()[0].split('=')[1]
|
|
|
|
res = dev[0].request("BSS RANGE=ALL MASK=0x20001")
|
|
if "id=" + id1 not in res:
|
|
raise Exception("Missing BSS " + id1)
|
|
if "id=" + id2 not in res:
|
|
raise Exception("Missing BSS " + id2)
|
|
if "====" not in res:
|
|
raise Exception("Missing delim")
|
|
if "####" not in res:
|
|
raise Exception("Missing end")
|
|
|
|
res = dev[0].request("BSS RANGE=ALL MASK=0x1").splitlines()
|
|
if len(res) != 2:
|
|
raise Exception("Unexpected result")
|
|
res = dev[0].request("BSS FIRST MASK=0x1")
|
|
if "id=" + id1 not in res:
|
|
raise Exception("Unexpected result: " + res)
|
|
res = dev[0].request("BSS LAST MASK=0x1")
|
|
if "id=" + id2 not in res:
|
|
raise Exception("Unexpected result: " + res)
|
|
res = dev[0].request("BSS ID-" + id1 + " MASK=0x1")
|
|
if "id=" + id1 not in res:
|
|
raise Exception("Unexpected result: " + res)
|
|
res = dev[0].request("BSS NEXT-" + id1 + " MASK=0x1")
|
|
if "id=" + id2 not in res:
|
|
raise Exception("Unexpected result: " + res)
|
|
|
|
if len(dev[0].request("BSS RANGE=" + id2 + " MASK=0x1").splitlines()) != 0:
|
|
raise Exception("Unexpected RANGE=1 result")
|
|
if len(dev[0].request("BSS RANGE=" + id1 + "- MASK=0x1").splitlines()) != 2:
|
|
raise Exception("Unexpected RANGE=0- result")
|
|
if len(dev[0].request("BSS RANGE=-" + id2 + " MASK=0x1").splitlines()) != 2:
|
|
raise Exception("Unexpected RANGE=-1 result")
|
|
if len(dev[0].request("BSS RANGE=" + id1 + "-" + id2 + " MASK=0x1").splitlines()) != 2:
|
|
raise Exception("Unexpected RANGE=0-1 result")
|
|
if len(dev[0].request("BSS RANGE=" + id2 + "-" + id2 + " MASK=0x1").splitlines()) != 1:
|
|
raise Exception("Unexpected RANGE=1-1 result")
|
|
if len(dev[0].request("BSS RANGE=" + str(int(id2) + 1) + "-" + str(int(id2) + 10) + " MASK=0x1").splitlines()) != 0:
|
|
raise Exception("Unexpected RANGE=2-10 result")
|
|
if len(dev[0].request("BSS RANGE=0-" + str(int(id2) + 10) + " MASK=0x1").splitlines()) != 2:
|
|
raise Exception("Unexpected RANGE=0-10 result")
|
|
|
|
def test_scan_and_interface_disabled(dev, apdev):
|
|
"""Scan operation when interface gets disabled"""
|
|
try:
|
|
dev[0].request("SCAN")
|
|
ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"])
|
|
if ev is None:
|
|
raise Exception("Scan did not start")
|
|
dev[0].request("DRIVER_EVENT INTERFACE_DISABLED")
|
|
ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], timeout=7)
|
|
if ev is not None:
|
|
raise Exception("Scan completed unexpectedly")
|
|
|
|
# verify that scan is rejected
|
|
if "FAIL" not in dev[0].request("SCAN"):
|
|
raise Exception("New scan request was accepted unexpectedly")
|
|
|
|
dev[0].request("DRIVER_EVENT INTERFACE_ENABLED")
|
|
dev[0].scan(freq="2412")
|
|
finally:
|
|
dev[0].request("DRIVER_EVENT INTERFACE_ENABLED")
|
|
|
|
def test_scan_for_auth(dev, apdev):
|
|
"""cfg80211 workaround with scan-for-auth"""
|
|
hapd = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "open" })
|
|
dev[0].scan_for_bss(apdev[0]['bssid'], freq="2412")
|
|
# Block sme-connect radio work with an external radio work item, so that
|
|
# SELECT_NETWORK can decide to use fast associate without a new scan while
|
|
# cfg80211 still has the matching BSS entry, but the actual connection is
|
|
# not yet started.
|
|
id = dev[0].request("RADIO_WORK add block-work")
|
|
ev = dev[0].wait_event(["EXT-RADIO-WORK-START"])
|
|
if ev is None:
|
|
raise Exception("Timeout while waiting radio work to start")
|
|
dev[0].connect("open", key_mgmt="NONE", scan_freq="2412",
|
|
wait_connect=False)
|
|
# Clear cfg80211 BSS table.
|
|
subprocess.call(['sudo', 'iw', dev[0].ifname, 'scan', 'trigger',
|
|
'freq', '2462', 'flush'])
|
|
time.sleep(0.1)
|
|
# Release blocking radio work to allow connection to go through with the
|
|
# cfg80211 BSS entry missing.
|
|
dev[0].request("RADIO_WORK done " + id)
|
|
|
|
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=15)
|
|
if ev is None:
|
|
raise Exception("Association with the AP timed out")
|
|
|
|
def test_scan_hidden(dev, apdev):
|
|
"""Control interface behavior on scan parameters"""
|
|
hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan",
|
|
"ignore_broadcast_ssid": "1" })
|
|
bssid = apdev[0]['bssid']
|
|
|
|
check_scan(dev[0], "freq=2412 use_id=1")
|
|
if "test-scan" in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS unexpectedly found in initial scan")
|
|
|
|
id1 = dev[0].connect("foo", key_mgmt="NONE", scan_ssid="1",
|
|
only_add_network=True)
|
|
id2 = dev[0].connect("test-scan", key_mgmt="NONE", scan_ssid="1",
|
|
only_add_network=True)
|
|
id3 = dev[0].connect("bar", key_mgmt="NONE", only_add_network=True)
|
|
|
|
check_scan(dev[0], "freq=2412 use_id=1")
|
|
if "test-scan" in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS unexpectedly found in scan")
|
|
|
|
check_scan(dev[0], "scan_id=%d,%d,%d freq=2412 use_id=1" % (id1, id2, id3))
|
|
if "test-scan" not in dev[0].request("SCAN_RESULTS"):
|
|
raise Exception("BSS not found in scan")
|