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tests: Verify PMKSA caching

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-12-29 19:25:42 +02:00
parent 04f7ecc686
commit 0fab9ce67a
2 changed files with 204 additions and 1 deletions
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186
tests/hwsim/test_pmksa_cache.py Normal file
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@ -0,0 +1,186 @@
#!/usr/bin/python
#
# WPA2-Enterprise PMKSA caching 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 logging
logger = logging.getLogger()
import hostapd
def test_pmksa_cache_on_roam_back(dev, apdev):
"""PMKSA cache to skip EAP on reassociation back to same AP"""
params = hostapd.wpa2_eap_params(ssid="test-pmksa-cache")
hostapd.add_ap(apdev[0]['ifname'], params)
bssid = apdev[0]['bssid']
dev[0].connect("test-pmksa-cache", proto="RSN", key_mgmt="WPA-EAP",
eap="GPSK", identity="gpsk user",
password="abcdefghijklmnop0123456789abcdef",
scan_freq="2412")
pmksa = dev[0].get_pmksa(bssid)
if pmksa is None:
raise Exception("No PMKSA cache entry created")
if pmksa['opportunistic'] != '0':
raise Exception("Unexpected opportunistic PMKSA cache entry")
hostapd.add_ap(apdev[1]['ifname'], params)
bssid2 = apdev[1]['bssid']
dev[0].dump_monitor()
logger.info("Roam to AP2")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid2)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-SUCCESS"], timeout=10)
if ev is None:
raise Exception("EAP success timed out")
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
pmksa2 = dev[0].get_pmksa(bssid2)
if pmksa2 is None:
raise Exception("No PMKSA cache entry found")
if pmksa2['opportunistic'] != '0':
raise Exception("Unexpected opportunistic PMKSA cache entry")
dev[0].dump_monitor()
logger.info("Roam back to AP1")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
pmksa1b = dev[0].get_pmksa(bssid)
if pmksa1b is None:
raise Exception("No PMKSA cache entry found")
if pmksa['pmkid'] != pmksa1b['pmkid']:
raise Exception("Unexpected PMKID change for AP1")
def test_pmksa_cache_opportunistic_only_on_sta(dev, apdev):
"""Opportunistic PMKSA caching enabled only on station"""
params = hostapd.wpa2_eap_params(ssid="test-pmksa-cache")
hostapd.add_ap(apdev[0]['ifname'], params)
bssid = apdev[0]['bssid']
dev[0].connect("test-pmksa-cache", proto="RSN", key_mgmt="WPA-EAP",
eap="GPSK", identity="gpsk user",
password="abcdefghijklmnop0123456789abcdef", okc=True,
scan_freq="2412")
pmksa = dev[0].get_pmksa(bssid)
if pmksa is None:
raise Exception("No PMKSA cache entry created")
if pmksa['opportunistic'] != '0':
raise Exception("Unexpected opportunistic PMKSA cache entry")
hostapd.add_ap(apdev[1]['ifname'], params)
bssid2 = apdev[1]['bssid']
dev[0].dump_monitor()
logger.info("Roam to AP2")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid2)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-SUCCESS"], timeout=10)
if ev is None:
raise Exception("EAP success timed out")
ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
pmksa2 = dev[0].get_pmksa(bssid2)
if pmksa2 is None:
raise Exception("No PMKSA cache entry found")
if pmksa2['opportunistic'] != '0':
raise Exception("Unexpected opportunistic PMKSA cache entry")
dev[0].dump_monitor()
logger.info("Roam back to AP1")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
pmksa1b = dev[0].get_pmksa(bssid)
if pmksa1b is None:
raise Exception("No PMKSA cache entry found")
if pmksa['pmkid'] != pmksa1b['pmkid']:
raise Exception("Unexpected PMKID change for AP1")
def test_pmksa_cache_opportunistic(dev, apdev):
"""Opportunistic PMKSA caching"""
params = hostapd.wpa2_eap_params(ssid="test-pmksa-cache")
params['okc'] = "1"
hostapd.add_ap(apdev[0]['ifname'], params)
bssid = apdev[0]['bssid']
dev[0].connect("test-pmksa-cache", proto="RSN", key_mgmt="WPA-EAP",
eap="GPSK", identity="gpsk user",
password="abcdefghijklmnop0123456789abcdef", okc=True,
scan_freq="2412")
pmksa = dev[0].get_pmksa(bssid)
if pmksa is None:
raise Exception("No PMKSA cache entry created")
if pmksa['opportunistic'] != '0':
raise Exception("Unexpected opportunistic PMKSA cache entry")
hostapd.add_ap(apdev[1]['ifname'], params)
bssid2 = apdev[1]['bssid']
dev[0].dump_monitor()
logger.info("Roam to AP2")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid2)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
pmksa2 = dev[0].get_pmksa(bssid2)
if pmksa2 is None:
raise Exception("No PMKSA cache entry created")
dev[0].dump_monitor()
logger.info("Roam back to AP1")
dev[0].scan(freq="2412")
dev[0].request("ROAM " + bssid)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Roaming with the AP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
pmksa1b = dev[0].get_pmksa(bssid)
if pmksa1b is None:
raise Exception("No PMKSA cache entry found")
if pmksa['pmkid'] != pmksa1b['pmkid']:
raise Exception("Unexpected PMKID change for AP1")
def test_pmksa_cache_expiration(dev, apdev):
"""PMKSA cache entry expiration"""
params = hostapd.wpa2_eap_params(ssid="test-pmksa-cache")
hostapd.add_ap(apdev[0]['ifname'], params)
bssid = apdev[0]['bssid']
dev[0].request("SET dot11RSNAConfigPMKLifetime 10")
dev[0].connect("test-pmksa-cache", proto="RSN", key_mgmt="WPA-EAP",
eap="GPSK", identity="gpsk user",
password="abcdefghijklmnop0123456789abcdef",
scan_freq="2412")
pmksa = dev[0].get_pmksa(bssid)
if pmksa is None:
raise Exception("No PMKSA cache entry created")
logger.info("Wait for PMKSA cache entry to expire")
ev = dev[0].wait_event(["WPA: Key negotiation completed",
"CTRL-EVENT-DISCONNECTED"], timeout=15)
if ev is None:
raise Exception("No EAP reauthentication seen")
if "CTRL-EVENT-DISCONNECTED" in ev:
raise Exception("Unexpected disconnection")
pmksa2 = dev[0].get_pmksa(bssid)
if pmksa['pmkid'] == pmksa2['pmkid']:
raise Exception("PMKID did not change")

19
tests/hwsim/wpasupplicant.py
View file

@ -532,7 +532,7 @@ class WpaSupplicant:
eap=None, identity=None, anonymous_identity=None,
password=None, phase1=None, phase2=None, ca_cert=None,
domain_suffix_match=None, password_hex=None,
client_cert=None, private_key=None, peerkey=False,
client_cert=None, private_key=None, peerkey=False, okc=False,
wait_connect=True, only_add_network=False):
logger.info("Connect STA " + self.ifname + " to AP")
id = self.add_network()
@ -579,6 +579,8 @@ class WpaSupplicant:
domain_suffix_match)
if peerkey:
self.set_network(id, "peerkey", "1")
if okc:
self.set_network(id, "proactive_key_caching", "1")
if only_add_network:
return id
if wait_connect:
@ -666,3 +668,18 @@ class WpaSupplicant:
[name,value] = l.split('=', 1)
vals[name] = value
return vals
def get_pmksa(self, bssid):
res = self.request("PMKSA")
lines = res.splitlines()
for l in lines:
if bssid not in l:
continue
vals = dict()
[index,aa,pmkid,expiration,opportunistic] = l.split(' ')
vals['index'] = index
vals['pmkid'] = pmkid
vals['expiration'] = expiration
vals['opportunistic'] = opportunistic
return vals
return None