mirror of
https://github.com/vanhoefm/fragattacks.git
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501 lines
19 KiB
Python
501 lines
19 KiB
Python
# EAP protocol tests
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# Copyright (c) 2014, Jouni Malinen <j@w1.fi>
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#
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# This software may be distributed under the terms of the BSD license.
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# See README for more details.
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import hmac
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import logging
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logger = logging.getLogger()
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import select
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import struct
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import threading
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import time
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import hostapd
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EAP_CODE_REQUEST = 1
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EAP_CODE_RESPONSE = 2
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EAP_CODE_SUCCESS = 3
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EAP_CODE_FAILURE = 4
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EAP_TYPE_IDENTITY = 1
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EAP_TYPE_NOTIFICATION = 2
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EAP_TYPE_NAK = 3
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EAP_TYPE_MD5 = 4
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EAP_TYPE_OTP = 5
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EAP_TYPE_GTC = 6
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EAP_TYPE_TLS = 13
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EAP_TYPE_LEAP = 17
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EAP_TYPE_SIM = 18
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EAP_TYPE_TTLS = 21
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EAP_TYPE_AKA = 23
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EAP_TYPE_PEAP = 25
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EAP_TYPE_MSCHAPV2 = 26
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EAP_TYPE_TLV = 33
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EAP_TYPE_TNC = 38
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EAP_TYPE_FAST = 43
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EAP_TYPE_PAX = 46
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EAP_TYPE_PSK = 47
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EAP_TYPE_SAKE = 48
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EAP_TYPE_IKEV2 = 49
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EAP_TYPE_AKA_PRIME = 50
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EAP_TYPE_GPSK = 51
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EAP_TYPE_PWD = 52
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EAP_TYPE_EKE = 53
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def run_pyrad_server(srv, t_stop, eap_handler):
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srv.RunWithStop(t_stop, eap_handler)
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def start_radius_server(eap_handler):
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try:
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import pyrad.server
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import pyrad.packet
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import pyrad.dictionary
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except ImportError:
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return None
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class TestServer(pyrad.server.Server):
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def _HandleAuthPacket(self, pkt):
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pyrad.server.Server._HandleAuthPacket(self, pkt)
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if len(pkt[79]) > 1:
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logger.info("Multiple EAP-Message attributes")
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# TODO: reassemble
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eap = pkt[79][0]
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eap_req = self.eap_handler(self.ctx, eap)
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reply = self.CreateReplyPacket(pkt)
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if eap_req:
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if len(eap_req) > 253:
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logger.info("Need to fragment EAP-Message")
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# TODO: fragment
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reply.AddAttribute("EAP-Message", eap_req)
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else:
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logger.info("No EAP request available")
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reply.code = pyrad.packet.AccessChallenge
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hmac_obj = hmac.new(reply.secret)
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hmac_obj.update(struct.pack("B", reply.code))
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hmac_obj.update(struct.pack("B", reply.id))
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# reply attributes
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reply.AddAttribute("Message-Authenticator",
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")
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attrs = reply._PktEncodeAttributes()
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# Length
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flen = 4 + 16 + len(attrs)
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hmac_obj.update(struct.pack(">H", flen))
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hmac_obj.update(pkt.authenticator)
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hmac_obj.update(attrs)
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del reply[80]
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reply.AddAttribute("Message-Authenticator", hmac_obj.digest())
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self.SendReplyPacket(pkt.fd, reply)
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def RunWithStop(self, t_stop, eap_handler):
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self._poll = select.poll()
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self._fdmap = {}
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self._PrepareSockets()
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self.t_stop = t_stop
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self.eap_handler = eap_handler
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self.ctx = {}
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while not t_stop.is_set():
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for (fd, event) in self._poll.poll(1000):
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if event == select.POLLIN:
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try:
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fdo = self._fdmap[fd]
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self._ProcessInput(fdo)
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except pyrad.server.ServerPacketError as err:
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logger.info("pyrad server dropping packet: " + str(err))
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except pyrad.packet.PacketError as err:
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logger.info("pyrad server received invalid packet: " + str(err))
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else:
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logger.error("Unexpected event in pyrad server main loop")
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srv = TestServer(dict=pyrad.dictionary.Dictionary("dictionary.radius"),
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authport=18138, acctport=18139)
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srv.hosts["127.0.0.1"] = pyrad.server.RemoteHost("127.0.0.1",
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"radius",
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"localhost")
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srv.BindToAddress("")
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t_stop = threading.Event()
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t = threading.Thread(target=run_pyrad_server, args=(srv, t_stop, eap_handler))
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t.start()
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return { 'srv': srv, 'stop': t_stop, 'thread': t }
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def stop_radius_server(srv):
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srv['stop'].set()
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srv['thread'].join()
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def start_ap(ifname):
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params = hostapd.wpa2_eap_params(ssid="eap-test")
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params['auth_server_port'] = "18138"
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hapd = hostapd.add_ap(ifname, params)
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return hapd
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EAP_SAKE_VERSION = 2
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EAP_SAKE_SUBTYPE_CHALLENGE = 1
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EAP_SAKE_SUBTYPE_CONFIRM = 2
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EAP_SAKE_SUBTYPE_AUTH_REJECT = 3
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EAP_SAKE_SUBTYPE_IDENTITY = 4
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EAP_SAKE_AT_RAND_S = 1
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EAP_SAKE_AT_RAND_P = 2
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EAP_SAKE_AT_MIC_S = 3
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EAP_SAKE_AT_MIC_P = 4
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EAP_SAKE_AT_SERVERID = 5
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EAP_SAKE_AT_PEERID = 6
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EAP_SAKE_AT_SPI_S = 7
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EAP_SAKE_AT_SPI_P = 8
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EAP_SAKE_AT_ANY_ID_REQ = 9
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EAP_SAKE_AT_PERM_ID_REQ = 10
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EAP_SAKE_AT_ENCR_DATA = 128
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EAP_SAKE_AT_IV = 129
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EAP_SAKE_AT_PADDING = 130
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EAP_SAKE_AT_NEXT_TMPID = 131
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EAP_SAKE_AT_MSK_LIFE = 132
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def test_eap_proto_sake(dev, apdev):
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"""EAP-SAKE protocol tests"""
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def sake_challenge(ctx):
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logger.info("Test: Challenge subtype")
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return struct.pack(">BBHBBBBBBLLLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 18,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CHALLENGE,
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EAP_SAKE_AT_RAND_S, 18, 0, 0, 0, 0)
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def sake_handler(ctx, req):
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logger.info("sake_handler - RX " + req.encode("hex"))
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if 'num' not in ctx:
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ctx['num'] = 0
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ctx['num'] = ctx['num'] + 1
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if 'id' not in ctx:
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ctx['id'] = 1
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ctx['id'] = (ctx['id'] + 1) % 256
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if ctx['num'] == 1:
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logger.info("Test: Missing payload")
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return struct.pack(">BBHB", EAP_CODE_REQUEST, ctx['id'], 4 + 1,
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EAP_TYPE_SAKE)
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if ctx['num'] == 2:
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logger.info("Test: Identity subtype without any attributes")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_IDENTITY)
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if ctx['num'] == 3:
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logger.info("Test: Identity subtype")
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return struct.pack(">BBHBBBBBBH", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 4,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_IDENTITY,
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EAP_SAKE_AT_ANY_ID_REQ, 4, 0)
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if ctx['num'] == 4:
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logger.info("Test: Identity subtype (different session id)")
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return struct.pack(">BBHBBBBBBH", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 4,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 1, EAP_SAKE_SUBTYPE_IDENTITY,
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EAP_SAKE_AT_PERM_ID_REQ, 4, 0)
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if ctx['num'] == 5:
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logger.info("Test: Identity subtype with too short attribute")
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return struct.pack(">BBHBBBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 2,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_IDENTITY,
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EAP_SAKE_AT_ANY_ID_REQ, 2)
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if ctx['num'] == 6:
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logger.info("Test: Identity subtype with truncated attribute")
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return struct.pack(">BBHBBBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 2,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_IDENTITY,
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EAP_SAKE_AT_ANY_ID_REQ, 4)
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if ctx['num'] == 7:
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logger.info("Test: Unknown subtype")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, 123)
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if ctx['num'] == 8:
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logger.info("Test: Challenge subtype without any attributes")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CHALLENGE)
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if ctx['num'] == 9:
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logger.info("Test: Challenge subtype with too short AT_RAND_S")
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return struct.pack(">BBHBBBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 2,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CHALLENGE,
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EAP_SAKE_AT_RAND_S, 2)
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if ctx['num'] == 10:
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return sake_challenge(ctx)
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if ctx['num'] == 11:
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logger.info("Test: Unexpected Identity subtype")
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return struct.pack(">BBHBBBBBBH", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 4,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_IDENTITY,
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EAP_SAKE_AT_ANY_ID_REQ, 4, 0)
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if ctx['num'] == 12:
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return sake_challenge(ctx)
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if ctx['num'] == 13:
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logger.info("Test: Unexpected Challenge subtype")
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return struct.pack(">BBHBBBBBBLLLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 18,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CHALLENGE,
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EAP_SAKE_AT_RAND_S, 18, 0, 0, 0, 0)
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if ctx['num'] == 14:
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return sake_challenge(ctx)
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if ctx['num'] == 15:
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logger.info("Test: Confirm subtype without any attributes")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CONFIRM)
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if ctx['num'] == 16:
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return sake_challenge(ctx)
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if ctx['num'] == 17:
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logger.info("Test: Confirm subtype with too short AT_MIC_S")
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return struct.pack(">BBHBBBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 2,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CONFIRM,
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EAP_SAKE_AT_MIC_S, 2)
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if ctx['num'] == 18:
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logger.info("Test: Unexpected Confirm subtype")
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return struct.pack(">BBHBBBBBBLLLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 18,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CONFIRM,
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EAP_SAKE_AT_MIC_S, 18, 0, 0, 0, 0)
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if ctx['num'] == 19:
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return sake_challenge(ctx)
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if ctx['num'] == 20:
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logger.info("Test: Confirm subtype with incorrect AT_MIC_S")
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return struct.pack(">BBHBBBBBBLLLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 18,
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EAP_TYPE_SAKE,
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EAP_SAKE_VERSION, 0, EAP_SAKE_SUBTYPE_CONFIRM,
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EAP_SAKE_AT_MIC_S, 18, 0, 0, 0, 0)
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return sake_challenge(ctx)
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srv = start_radius_server(sake_handler)
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if srv is None:
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return "skip"
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try:
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hapd = start_ap(apdev[0]['ifname'])
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for i in range(0, 14):
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dev[0].connect("eap-test", key_mgmt="WPA-EAP", scan_freq="2412",
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eap="SAKE", identity="sake user",
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password_hex="0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
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wait_connect=False)
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ev = dev[0].wait_event(["CTRL-EVENT-EAP-PROPOSED-METHOD"], timeout=15)
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if ev is None:
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raise Exception("Timeout on EAP start")
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time.sleep(0.1)
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dev[0].request("REMOVE_NETWORK all")
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logger.info("Too short password")
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dev[0].connect("eap-test", key_mgmt="WPA-EAP", scan_freq="2412",
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eap="SAKE", identity="sake user",
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password_hex="0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcd",
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wait_connect=False)
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ev = dev[0].wait_event(["CTRL-EVENT-EAP-PROPOSED-METHOD"], timeout=15)
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if ev is None:
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raise Exception("Timeout on EAP start")
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time.sleep(0.1)
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finally:
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stop_radius_server(srv)
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def test_eap_proto_leap(dev, apdev):
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"""EAP-LEAP protocol tests"""
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def leap_handler(ctx, req):
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logger.info("leap_handler - RX " + req.encode("hex"))
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if 'num' not in ctx:
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ctx['num'] = 0
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ctx['num'] = ctx['num'] + 1
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if 'id' not in ctx:
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ctx['id'] = 1
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ctx['id'] = (ctx['id'] + 1) % 256
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if ctx['num'] == 1:
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logger.info("Test: Missing payload")
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return struct.pack(">BBHB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1,
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EAP_TYPE_LEAP)
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if ctx['num'] == 2:
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logger.info("Test: Unexpected version")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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0, 0, 0)
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if ctx['num'] == 3:
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logger.info("Test: Invalid challenge length")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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1, 0, 0)
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if ctx['num'] == 4:
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logger.info("Test: Truncated challenge")
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return struct.pack(">BBHBBBB", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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1, 0, 8)
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if ctx['num'] == 5:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 6:
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logger.info("Test: Missing payload in Response")
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return struct.pack(">BBHB", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1,
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EAP_TYPE_LEAP)
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if ctx['num'] == 7:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 8:
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logger.info("Test: Unexpected version in Response")
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return struct.pack(">BBHBBBB", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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0, 0, 8)
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if ctx['num'] == 9:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 10:
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logger.info("Test: Invalid challenge length in Response")
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return struct.pack(">BBHBBBB", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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1, 0, 0)
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if ctx['num'] == 11:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 12:
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logger.info("Test: Truncated challenge in Response")
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return struct.pack(">BBHBBBB", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1 + 3,
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EAP_TYPE_LEAP,
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1, 0, 24)
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if ctx['num'] == 13:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 14:
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logger.info("Test: Invalid challange value in Response")
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return struct.pack(">BBHBBBB6L", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1 + 3 + 24,
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EAP_TYPE_LEAP,
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1, 0, 24,
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0, 0, 0, 0, 0, 0)
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if ctx['num'] == 15:
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logger.info("Test: Valid challenge")
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return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
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4 + 1 + 3 + 8,
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EAP_TYPE_LEAP,
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1, 0, 8, 0, 0)
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if ctx['num'] == 16:
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logger.info("Test: Valid challange value in Response")
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return struct.pack(">BBHBBBB24B", EAP_CODE_RESPONSE, ctx['id'],
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4 + 1 + 3 + 24,
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EAP_TYPE_LEAP,
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1, 0, 24,
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0x48, 0x4e, 0x46, 0xe3, 0x88, 0x49, 0x46, 0xbd,
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|
0x28, 0x48, 0xf8, 0x53, 0x82, 0x50, 0x00, 0x04,
|
|
0x93, 0x50, 0x30, 0xd7, 0x25, 0xea, 0x5f, 0x66)
|
|
|
|
if ctx['num'] == 17:
|
|
logger.info("Test: Valid challenge")
|
|
return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
|
|
4 + 1 + 3 + 8,
|
|
EAP_TYPE_LEAP,
|
|
1, 0, 8, 0, 0)
|
|
if ctx['num'] == 18:
|
|
logger.info("Test: Success")
|
|
return struct.pack(">BBHB", EAP_CODE_SUCCESS, ctx['id'],
|
|
4 + 1,
|
|
EAP_TYPE_LEAP)
|
|
# hostapd will drop the next frame in the sequence
|
|
|
|
if ctx['num'] == 19:
|
|
logger.info("Test: Valid challenge")
|
|
return struct.pack(">BBHBBBBLL", EAP_CODE_REQUEST, ctx['id'],
|
|
4 + 1 + 3 + 8,
|
|
EAP_TYPE_LEAP,
|
|
1, 0, 8, 0, 0)
|
|
if ctx['num'] == 20:
|
|
logger.info("Test: Failure")
|
|
return struct.pack(">BBHB", EAP_CODE_FAILURE, ctx['id'],
|
|
4 + 1,
|
|
EAP_TYPE_LEAP)
|
|
|
|
return None
|
|
|
|
srv = start_radius_server(leap_handler)
|
|
if srv is None:
|
|
return "skip"
|
|
|
|
try:
|
|
hapd = start_ap(apdev[0]['ifname'])
|
|
|
|
for i in range(0, 12):
|
|
dev[0].connect("eap-test", key_mgmt="WPA-EAP", scan_freq="2412",
|
|
eap="LEAP", identity="user", password="password",
|
|
wait_connect=False)
|
|
ev = dev[0].wait_event(["CTRL-EVENT-EAP-PROPOSED-METHOD"], timeout=15)
|
|
if ev is None:
|
|
raise Exception("Timeout on EAP start")
|
|
time.sleep(0.1)
|
|
if i == 10:
|
|
logger.info("Wait for additional roundtrip")
|
|
time.sleep(1)
|
|
dev[0].request("REMOVE_NETWORK all")
|
|
finally:
|
|
stop_radius_server(srv)
|