krackattacks/tests/hwsim/test_ap_ciphers.py

# Cipher suite tests
# Copyright (c) 2013-2015, Jouni Malinen <j@w1.fi>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.

from remotehost import remote_compatible
import time
import logging
logger = logging.getLogger()
import os
import subprocess

import hwsim_utils
import hostapd
from utils import HwsimSkip, skip_with_fips, require_under_vm
from wlantest import Wlantest

def check_cipher(dev, ap, cipher):
    if cipher not in dev.get_capability("pairwise"):
        raise HwsimSkip("Cipher %s not supported" % cipher)
    params = { "ssid": "test-wpa2-psk",
               "wpa_passphrase": "12345678",
               "wpa": "2",
               "wpa_key_mgmt": "WPA-PSK",
               "rsn_pairwise": cipher }
    hapd = hostapd.add_ap(ap, params)
    dev.connect("test-wpa2-psk", psk="12345678",
                pairwise=cipher, group=cipher, scan_freq="2412")
    hwsim_utils.test_connectivity(dev, hapd)

def check_group_mgmt_cipher(dev, ap, cipher, sta_req_cipher=None):
    if cipher not in dev.get_capability("group_mgmt"):
        raise HwsimSkip("Cipher %s not supported" % cipher)
    params = { "ssid": "test-wpa2-psk-pmf",
               "wpa_passphrase": "12345678",
               "wpa": "2",
               "ieee80211w": "2",
               "wpa_key_mgmt": "WPA-PSK-SHA256",
               "rsn_pairwise": "CCMP",
               "group_mgmt_cipher": cipher }
    hapd = hostapd.add_ap(ap, params)

    Wlantest.setup(hapd)
    wt = Wlantest()
    wt.flush()
    wt.add_passphrase("12345678")

    dev.connect("test-wpa2-psk-pmf", psk="12345678", ieee80211w="2",
                key_mgmt="WPA-PSK-SHA256", group_mgmt=sta_req_cipher,
                pairwise="CCMP", group="CCMP", scan_freq="2412")
    hwsim_utils.test_connectivity(dev, hapd)
    hapd.request("DEAUTHENTICATE ff:ff:ff:ff:ff:ff")
    dev.wait_disconnected()
    if wt.get_bss_counter('valid_bip_mmie', ap['bssid']) < 1:
        raise Exception("No valid BIP MMIE seen")
    if wt.get_bss_counter('bip_deauth', ap['bssid']) < 1:
        raise Exception("No valid BIP deauth seen")

    if cipher == "AES-128-CMAC":
        group_mgmt = "BIP"
    else:
        group_mgmt = cipher
    res =  wt.info_bss('group_mgmt', ap['bssid']).strip()
    if res != group_mgmt:
        raise Exception("Unexpected group mgmt cipher: " + res)

@remote_compatible
def test_ap_cipher_tkip(dev, apdev):
    """WPA2-PSK/TKIP connection"""
    skip_with_fips(dev[0])
    check_cipher(dev[0], apdev[0], "TKIP")

@remote_compatible
def test_ap_cipher_tkip_countermeasures_ap(dev, apdev):
    """WPA-PSK/TKIP countermeasures (detected by AP)"""
    skip_with_fips(dev[0])
    testfile = "/sys/kernel/debug/ieee80211/%s/netdev:%s/tkip_mic_test" % (dev[0].get_driver_status_field("phyname"), dev[0].ifname)
    if dev[0].cmd_execute([ "ls", testfile ])[0] != 0:
        raise HwsimSkip("tkip_mic_test not supported in mac80211")

    params = { "ssid": "tkip-countermeasures",
               "wpa_passphrase": "12345678",
               "wpa": "1",
               "wpa_key_mgmt": "WPA-PSK",
               "wpa_pairwise": "TKIP" }
    hapd = hostapd.add_ap(apdev[0], params)

    dev[0].connect("tkip-countermeasures", psk="12345678",
                   pairwise="TKIP", group="TKIP", scan_freq="2412")

    dev[0].dump_monitor()
    dev[0].cmd_execute([ "echo", "-n", apdev[0]['bssid'], ">", testfile ],
                       shell=True)
    ev = dev[0].wait_event(["CTRL-EVENT-DISCONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected disconnection on first Michael MIC failure")

    dev[0].cmd_execute([ "echo", "-n", "ff:ff:ff:ff:ff:ff", ">", testfile ],
                       shell=True)
    ev = dev[0].wait_disconnected(timeout=10,
                                  error="No disconnection after two Michael MIC failures")
    if "reason=14" not in ev:
        raise Exception("Unexpected disconnection reason: " + ev)
    ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected connection during TKIP countermeasures")

@remote_compatible
def test_ap_cipher_tkip_countermeasures_sta(dev, apdev):
    """WPA-PSK/TKIP countermeasures (detected by STA)"""
    skip_with_fips(dev[0])
    params = { "ssid": "tkip-countermeasures",
               "wpa_passphrase": "12345678",
               "wpa": "1",
               "wpa_key_mgmt": "WPA-PSK",
               "wpa_pairwise": "TKIP" }
    hapd = hostapd.add_ap(apdev[0], params)

    testfile = "/sys/kernel/debug/ieee80211/%s/netdev:%s/tkip_mic_test" % (hapd.get_driver_status_field("phyname"), apdev[0]['ifname'])
    if hapd.cmd_execute([ "ls", testfile ])[0] != 0:
        raise HwsimSkip("tkip_mic_test not supported in mac80211")

    dev[0].connect("tkip-countermeasures", psk="12345678",
                   pairwise="TKIP", group="TKIP", scan_freq="2412")

    dev[0].dump_monitor()
    hapd.cmd_execute([ "echo", "-n", dev[0].own_addr(), ">", testfile ],
                     shell=True)
    ev = dev[0].wait_event(["CTRL-EVENT-DISCONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected disconnection on first Michael MIC failure")

    hapd.cmd_execute([ "echo", "-n", "ff:ff:ff:ff:ff:ff", ">", testfile ],
                     shell=True)
    ev = dev[0].wait_disconnected(timeout=10,
                                  error="No disconnection after two Michael MIC failures")
    if "reason=14 locally_generated=1" not in ev:
        raise Exception("Unexpected disconnection reason: " + ev)
    ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected connection during TKIP countermeasures")

def test_ap_cipher_tkip_countermeasures_sta2(dev, apdev, params):
    """WPA-PSK/TKIP countermeasures (detected by two STAs) [long]"""
    if not params['long']:
        raise HwsimSkip("Skip test case with long duration due to --long not specified")
    skip_with_fips(dev[0])
    params = { "ssid": "tkip-countermeasures",
               "wpa_passphrase": "12345678",
               "wpa": "1",
               "wpa_key_mgmt": "WPA-PSK",
               "wpa_pairwise": "TKIP" }
    hapd = hostapd.add_ap(apdev[0], params)

    testfile = "/sys/kernel/debug/ieee80211/%s/netdev:%s/tkip_mic_test" % (hapd.get_driver_status_field("phyname"), apdev[0]['ifname'])
    if hapd.cmd_execute([ "ls", testfile ])[0] != 0:
        raise HwsimSkip("tkip_mic_test not supported in mac80211")

    dev[0].connect("tkip-countermeasures", psk="12345678",
                   pairwise="TKIP", group="TKIP", scan_freq="2412")
    dev[0].dump_monitor()
    id = dev[1].connect("tkip-countermeasures", psk="12345678",
                        pairwise="TKIP", group="TKIP", scan_freq="2412")
    dev[1].dump_monitor()

    hapd.cmd_execute([ "echo", "-n", "ff:ff:ff:ff:ff:ff", ">", testfile ],
                     shell=True)
    ev = dev[0].wait_disconnected(timeout=10,
                                  error="No disconnection after two Michael MIC failure")
    if "reason=14" not in ev:
        raise Exception("Unexpected disconnection reason: " + ev)
    ev = dev[1].wait_disconnected(timeout=5,
                                  error="No disconnection after two Michael MIC failure")
    if "reason=14" not in ev:
        raise Exception("Unexpected disconnection reason: " + ev)
    ev = dev[0].wait_event(["CTRL-EVENT-CONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected connection during TKIP countermeasures")
    ev = dev[1].wait_event(["CTRL-EVENT-CONNECTED"], timeout=1)
    if ev is not None:
        raise Exception("Unexpected connection during TKIP countermeasures")

    dev[0].request("REMOVE_NETWORK all")
    logger.info("Waiting for TKIP countermeasures to end")
    connected = False
    start = os.times()[4]
    while True:
        now = os.times()[4]
        if start + 70 < now:
            break
        dev[0].connect("tkip-countermeasures", psk="12345678",
                       pairwise="TKIP", group="TKIP", scan_freq="2412",
                       wait_connect=False)
        ev = dev[0].wait_event(["CTRL-EVENT-AUTH-REJECT",
                                "CTRL-EVENT-CONNECTED"], timeout=10)
        if ev is None:
            raise Exception("No connection result")
        if "CTRL-EVENT-CONNECTED" in ev:
            connected = True
            break
        if "status_code=14" not in ev:
            raise Exception("Unexpected connection failure reason during TKIP countermeasures: " + ev)
        dev[0].request("REMOVE_NETWORK all")
        time.sleep(1)
        dev[0].dump_monitor()
        dev[1].dump_monitor()
    if not connected:
        raise Exception("No connection after TKIP countermeasures terminated")

    ev = dev[1].wait_event(["CTRL-EVENT-CONNECTED"], timeout=1)
    if ev is None:
        dev[1].request("DISCONNECT")
        dev[1].select_network(id)
        dev[1].wait_connected()

@remote_compatible
def test_ap_cipher_ccmp(dev, apdev):
    """WPA2-PSK/CCMP connection"""
    check_cipher(dev[0], apdev[0], "CCMP")

def test_ap_cipher_gcmp(dev, apdev):
    """WPA2-PSK/GCMP connection"""
    check_cipher(dev[0], apdev[0], "GCMP")

def test_ap_cipher_ccmp_256(dev, apdev):
    """WPA2-PSK/CCMP-256 connection"""
    check_cipher(dev[0], apdev[0], "CCMP-256")

def test_ap_cipher_gcmp_256(dev, apdev):
    """WPA2-PSK/GCMP-256 connection"""
    check_cipher(dev[0], apdev[0], "GCMP-256")

@remote_compatible
def test_ap_cipher_mixed_wpa_wpa2(dev, apdev):
    """WPA2-PSK/CCMP/ and WPA-PSK/TKIP mixed configuration"""
    skip_with_fips(dev[0])
    ssid = "test-wpa-wpa2-psk"
    passphrase = "12345678"
    params = { "ssid": ssid,
               "wpa_passphrase": passphrase,
               "wpa": "3",
               "wpa_key_mgmt": "WPA-PSK",
               "rsn_pairwise": "CCMP",
               "wpa_pairwise": "TKIP" }
    hapd = hostapd.add_ap(apdev[0], params)
    dev[0].connect(ssid, psk=passphrase, proto="WPA2",
                   pairwise="CCMP", group="TKIP", scan_freq="2412")
    status = dev[0].get_status()
    if status['key_mgmt'] != 'WPA2-PSK':
        raise Exception("Incorrect key_mgmt reported")
    if status['pairwise_cipher'] != 'CCMP':
        raise Exception("Incorrect pairwise_cipher reported")
    if status['group_cipher'] != 'TKIP':
        raise Exception("Incorrect group_cipher reported")
    bss = dev[0].get_bss(apdev[0]['bssid'])
    if bss['ssid'] != ssid:
        raise Exception("Unexpected SSID in the BSS entry")
    if "[WPA-PSK-TKIP]" not in bss['flags']:
        raise Exception("Missing BSS flag WPA-PSK-TKIP")
    if "[WPA2-PSK-CCMP]" not in bss['flags']:
        raise Exception("Missing BSS flag WPA2-PSK-CCMP")
    hwsim_utils.test_connectivity(dev[0], hapd)

    dev[1].connect(ssid, psk=passphrase, proto="WPA",
                   pairwise="TKIP", group="TKIP", scan_freq="2412")
    status = dev[1].get_status()
    if status['key_mgmt'] != 'WPA-PSK':
        raise Exception("Incorrect key_mgmt reported")
    if status['pairwise_cipher'] != 'TKIP':
        raise Exception("Incorrect pairwise_cipher reported")
    if status['group_cipher'] != 'TKIP':
        raise Exception("Incorrect group_cipher reported")
    hwsim_utils.test_connectivity(dev[1], hapd)
    hwsim_utils.test_connectivity(dev[0], dev[1])

@remote_compatible
def test_ap_cipher_bip(dev, apdev):
    """WPA2-PSK with BIP"""
    check_group_mgmt_cipher(dev[0], apdev[0], "AES-128-CMAC")

def test_ap_cipher_bip_req(dev, apdev):
    """WPA2-PSK with BIP required"""
    check_group_mgmt_cipher(dev[0], apdev[0], "AES-128-CMAC", "AES-128-CMAC")

def test_ap_cipher_bip_req2(dev, apdev):
    """WPA2-PSK with BIP required (2)"""
    check_group_mgmt_cipher(dev[0], apdev[0], "AES-128-CMAC",
                            "AES-128-CMAC BIP-GMAC-128 BIP-GMAC-256 BIP-CMAC-256")

def test_ap_cipher_bip_gmac_128(dev, apdev):
    """WPA2-PSK with BIP-GMAC-128"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-GMAC-128")

def test_ap_cipher_bip_gmac_128_req(dev, apdev):
    """WPA2-PSK with BIP-GMAC-128 required"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-GMAC-128", "BIP-GMAC-128")

def test_ap_cipher_bip_gmac_256(dev, apdev):
    """WPA2-PSK with BIP-GMAC-256"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-GMAC-256")

def test_ap_cipher_bip_gmac_256_req(dev, apdev):
    """WPA2-PSK with BIP-GMAC-256 required"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-GMAC-256", "BIP-GMAC-256")

def test_ap_cipher_bip_cmac_256(dev, apdev):
    """WPA2-PSK with BIP-CMAC-256"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-CMAC-256")

def test_ap_cipher_bip_cmac_256_req(dev, apdev):
    """WPA2-PSK with BIP-CMAC-256 required"""
    check_group_mgmt_cipher(dev[0], apdev[0], "BIP-CMAC-256", "BIP-CMAC-256")

def test_ap_cipher_bip_req_mismatch(dev, apdev):
    """WPA2-PSK with BIP cipher mismatch"""
    group_mgmt = dev[0].get_capability("group_mgmt")
    for cipher in [ "AES-128-CMAC", "BIP-GMAC-256" ]:
        if cipher not in group_mgmt:
            raise HwsimSkip("Cipher %s not supported" % cipher)

    params = { "ssid": "test-wpa2-psk-pmf",
               "wpa_passphrase": "12345678",
               "wpa": "2",
               "ieee80211w": "2",
               "wpa_key_mgmt": "WPA-PSK-SHA256",
               "rsn_pairwise": "CCMP",
               "group_mgmt_cipher": "AES-128-CMAC" }
    hapd = hostapd.add_ap(apdev[0], params)

    dev[0].scan_for_bss(hapd.own_addr(), 2412)
    id = dev[0].connect("test-wpa2-psk-pmf", psk="12345678", ieee80211w="2",
                        key_mgmt="WPA-PSK-SHA256", group_mgmt="BIP-GMAC-256",
                        pairwise="CCMP", group="CCMP", scan_freq="2412",
                        wait_connect=False)
    ev = dev[0].wait_event(["CTRL-EVENT-NETWORK-NOT-FOUND",
                            "CTRL-EVENT-CONNECTED"], timeout=10)
    if ev is None:
        raise Exception("Network selection result not indicated")
    if "CTRL-EVENT-CONNECTED" in ev:
        raise Exception("Unexpected connection")

    dev[0].request("DISCONNECT")
    dev[0].set_network(id, "group_mgmt", "AES-128-CMAC")
    dev[0].select_network(id)
    dev[0].wait_connected()

def get_rx_spec(phy, gtk=False):
    keys = "/sys/kernel/debug/ieee80211/%s/keys" % (phy)
    for key in os.listdir(keys):
        keydir = keys + "/" + key
        files = os.listdir(keydir)
        if not gtk and "station" not in files:
            continue
        if gtk and "station" in files:
            continue
        with open(keydir + "/rx_spec") as f:
            return f.read()
    return None

def test_ap_wpa2_delayed_group_m1_retransmission(dev, apdev):
    """Delayed group M1 retransmission"""
    require_under_vm()
    try:
        subprocess.call(['sysctl', '-w', 'net.ipv6.conf.all.disable_ipv6=1'],
                        stdout=open('/dev/null', 'w'))
        subprocess.call(['sysctl', '-w',
                         'net.ipv6.conf.default.disable_ipv6=1'],
                        stdout=open('/dev/null', 'w'))
        run_ap_wpa2_delayed_group_m1_retransmission(dev, apdev)
    finally:
        subprocess.call(['sysctl', '-w', 'net.ipv6.conf.all.disable_ipv6=0'],
                        stdout=open('/dev/null', 'w'))
        subprocess.call(['sysctl', '-w',
                         'net.ipv6.conf.default.disable_ipv6=0'],
                        stdout=open('/dev/null', 'w'))

def run_ap_wpa2_delayed_group_m1_retransmission(dev, apdev):
    params = hostapd.wpa2_params(ssid="test-wpa2-psk", passphrase="12345678")
    hapd = hostapd.add_ap(apdev[0], params)

    Wlantest.setup(hapd)
    wt = Wlantest()
    wt.flush()
    wt.add_passphrase("12345678")

    phy = dev[0].get_driver_status_field("phyname")
    dev[0].connect("test-wpa2-psk", psk="12345678", scan_freq="2412")

    for i in range(5):
        hwsim_utils.test_connectivity(dev[0], hapd)

    time.sleep(0.1)
    before = get_rx_spec(phy, gtk=True).splitlines()
    addr = dev[0].own_addr()
    if "OK" not in hapd.request("RESEND_GROUP_M1 " + addr):
        raise Exception("RESEND_GROUP_M1 failed")
    time.sleep(0.1)
    after = get_rx_spec(phy, gtk=True).splitlines()

    if "OK" not in hapd.request("RESET_PN " + addr):
        raise Exception("RESET_PN failed")
    time.sleep(0.1)
    hwsim_utils.test_connectivity(dev[0], hapd, timeout=1,
                                  success_expected=False)
    dev[0].request("DISCONNECT")
    dev[0].wait_disconnected()

    for i in range(len(before)):
        b = int(before[i], 16)
        a = int(after[i], 16)
        if a < b:
            raise Exception("RX counter decreased: idx=%d before=%d after=%d" % (i, b, a))