/usr/share/pyshared/scapy/layers/dot11.py is in python-scapy 2.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 | ## This file is part of Scapy
## See http://www.secdev.org/projects/scapy for more informations
## Copyright (C) Philippe Biondi <phil@secdev.org>
## This program is published under a GPLv2 license
"""
Wireless LAN according to IEEE 802.11.
"""
import re,struct
from scapy.packet import *
from scapy.fields import *
from scapy.plist import PacketList
from scapy.layers.l2 import *
try:
from Crypto.Cipher import ARC4
except ImportError:
log_loading.info("Can't import python Crypto lib. Won't be able to decrypt WEP.")
### Fields
class Dot11AddrMACField(MACField):
def is_applicable(self, pkt):
return 1
def addfield(self, pkt, s, val):
if self.is_applicable(pkt):
return MACField.addfield(self, pkt, s, val)
else:
return s
def getfield(self, pkt, s):
if self.is_applicable(pkt):
return MACField.getfield(self, pkt, s)
else:
return s,None
class Dot11Addr2MACField(Dot11AddrMACField):
def is_applicable(self, pkt):
if pkt.type == 1:
return pkt.subtype in [ 0xb, 0xa, 0xe, 0xf] # RTS, PS-Poll, CF-End, CF-End+CF-Ack
return 1
class Dot11Addr3MACField(Dot11AddrMACField):
def is_applicable(self, pkt):
if pkt.type in [0,2]:
return 1
return 0
class Dot11Addr4MACField(Dot11AddrMACField):
def is_applicable(self, pkt):
if pkt.type == 2:
if pkt.FCfield & 0x3 == 0x3: # To-DS and From-DS are set
return 1
return 0
### Layers
class PrismHeader(Packet):
""" iwpriv wlan0 monitor 3 """
name = "Prism header"
fields_desc = [ LEIntField("msgcode",68),
LEIntField("len",144),
StrFixedLenField("dev","",16),
LEIntField("hosttime_did",0),
LEShortField("hosttime_status",0),
LEShortField("hosttime_len",0),
LEIntField("hosttime",0),
LEIntField("mactime_did",0),
LEShortField("mactime_status",0),
LEShortField("mactime_len",0),
LEIntField("mactime",0),
LEIntField("channel_did",0),
LEShortField("channel_status",0),
LEShortField("channel_len",0),
LEIntField("channel",0),
LEIntField("rssi_did",0),
LEShortField("rssi_status",0),
LEShortField("rssi_len",0),
LEIntField("rssi",0),
LEIntField("sq_did",0),
LEShortField("sq_status",0),
LEShortField("sq_len",0),
LEIntField("sq",0),
LEIntField("signal_did",0),
LEShortField("signal_status",0),
LEShortField("signal_len",0),
LESignedIntField("signal",0),
LEIntField("noise_did",0),
LEShortField("noise_status",0),
LEShortField("noise_len",0),
LEIntField("noise",0),
LEIntField("rate_did",0),
LEShortField("rate_status",0),
LEShortField("rate_len",0),
LEIntField("rate",0),
LEIntField("istx_did",0),
LEShortField("istx_status",0),
LEShortField("istx_len",0),
LEIntField("istx",0),
LEIntField("frmlen_did",0),
LEShortField("frmlen_status",0),
LEShortField("frmlen_len",0),
LEIntField("frmlen",0),
]
def answers(self, other):
if isinstance(other, PrismHeader):
return self.payload.answers(other.payload)
else:
return self.payload.answers(other)
class RadioTap(Packet):
name = "RadioTap dummy"
fields_desc = [ ByteField('version', 0),
ByteField('pad', 0),
FieldLenField('len', None, 'notdecoded', '<H', adjust=lambda pkt,x:x+8),
FlagsField('present', None, -32, ['TSFT','Flags','Rate','Channel','FHSS','dBm_AntSignal',
'dBm_AntNoise','Lock_Quality','TX_Attenuation','dB_TX_Attenuation',
'dBm_TX_Power', 'Antenna', 'dB_AntSignal', 'dB_AntNoise',
'b14', 'b15','b16','b17','b18','b19','b20','b21','b22','b23',
'b24','b25','b26','b27','b28','b29','b30','Ext']),
StrLenField('notdecoded', "", length_from= lambda pkt:pkt.len-8) ]
class PPI(Packet):
name = "Per-Packet Information header (partial)"
fields_desc = [ ByteField("version", 0),
ByteField("flags", 0),
FieldLenField("len", None, fmt="<H", length_of="fields", adjust=lambda pkt,x:x+8),
LEIntField("dlt", 0),
StrLenField("notdecoded", "", length_from = lambda pkt:pkt.len-8)
]
class Dot11SCField(LEShortField):
def is_applicable(self, pkt):
return pkt.type != 1 # control frame
def addfield(self, pkt, s, val):
if self.is_applicable(pkt):
return LEShortField.addfield(self, pkt, s, val)
else:
return s
def getfield(self, pkt, s):
if self.is_applicable(pkt):
return LEShortField.getfield(self, pkt, s)
else:
return s,None
class Dot11(Packet):
name = "802.11"
fields_desc = [
BitField("subtype", 0, 4),
BitEnumField("type", 0, 2, ["Management", "Control", "Data", "Reserved"]),
BitField("proto", 0, 2),
FlagsField("FCfield", 0, 8, ["to-DS", "from-DS", "MF", "retry", "pw-mgt", "MD", "wep", "order"]),
ShortField("ID",0),
MACField("addr1", ETHER_ANY),
Dot11Addr2MACField("addr2", ETHER_ANY),
Dot11Addr3MACField("addr3", ETHER_ANY),
Dot11SCField("SC", 0),
Dot11Addr4MACField("addr4", ETHER_ANY)
]
def mysummary(self):
return self.sprintf("802.11 %Dot11.type% %Dot11.subtype% %Dot11.addr2% > %Dot11.addr1%")
def guess_payload_class(self, payload):
if self.type == 0x02 and (self.subtype >= 0x08 and self.subtype <=0xF and self.subtype != 0xD):
return Dot11QoS
elif self.FCfield & 0x40:
return Dot11WEP
else:
return Packet.guess_payload_class(self, payload)
def answers(self, other):
if isinstance(other,Dot11):
if self.type == 0: # management
if self.addr1.lower() != other.addr2.lower(): # check resp DA w/ req SA
return 0
if (other.subtype,self.subtype) in [(0,1),(2,3),(4,5)]:
return 1
if self.subtype == other.subtype == 11: # auth
return self.payload.answers(other.payload)
elif self.type == 1: # control
return 0
elif self.type == 2: # data
return self.payload.answers(other.payload)
elif self.type == 3: # reserved
return 0
return 0
def unwep(self, key=None, warn=1):
if self.FCfield & 0x40 == 0:
if warn:
warning("No WEP to remove")
return
if isinstance(self.payload.payload, NoPayload):
if key or conf.wepkey:
self.payload.decrypt(key)
if isinstance(self.payload.payload, NoPayload):
if warn:
warning("Dot11 can't be decrypted. Check conf.wepkey.")
return
self.FCfield &= ~0x40
self.payload=self.payload.payload
class Dot11QoS(Packet):
name = "802.11 QoS"
fields_desc = [ BitField("TID",None,4),
BitField("EOSP",None,1),
BitField("Ack Policy",None,2),
BitField("Reserved",None,1),
ByteField("TXOP",None) ]
def guess_payload_class(self, payload):
if isinstance(self.underlayer, Dot11):
if self.underlayer.FCfield & 0x40:
return Dot11WEP
return Packet.guess_payload_class(self, payload)
capability_list = [ "res8", "res9", "short-slot", "res11",
"res12", "DSSS-OFDM", "res14", "res15",
"ESS", "IBSS", "CFP", "CFP-req",
"privacy", "short-preamble", "PBCC", "agility"]
reason_code = {0:"reserved",1:"unspec", 2:"auth-expired",
3:"deauth-ST-leaving",
4:"inactivity", 5:"AP-full", 6:"class2-from-nonauth",
7:"class3-from-nonass", 8:"disas-ST-leaving",
9:"ST-not-auth"}
status_code = {0:"success", 1:"failure", 10:"cannot-support-all-cap",
11:"inexist-asso", 12:"asso-denied", 13:"algo-unsupported",
14:"bad-seq-num", 15:"challenge-failure",
16:"timeout", 17:"AP-full",18:"rate-unsupported" }
class Dot11Beacon(Packet):
name = "802.11 Beacon"
fields_desc = [ LELongField("timestamp", 0),
LEShortField("beacon_interval", 0x0064),
FlagsField("cap", 0, 16, capability_list) ]
class Dot11Elt(Packet):
name = "802.11 Information Element"
fields_desc = [ ByteEnumField("ID", 0, {0:"SSID", 1:"Rates", 2: "FHset", 3:"DSset", 4:"CFset", 5:"TIM", 6:"IBSSset", 16:"challenge",
42:"ERPinfo", 46:"QoS Capability", 47:"ERPinfo", 48:"RSNinfo", 50:"ESRates",221:"vendor",68:"reserved"}),
FieldLenField("len", None, "info", "B"),
StrLenField("info", "", length_from=lambda x:x.len) ]
def mysummary(self):
if self.ID == 0:
return "SSID=%s"%repr(self.info),[Dot11]
else:
return ""
class Dot11ATIM(Packet):
name = "802.11 ATIM"
class Dot11Disas(Packet):
name = "802.11 Disassociation"
fields_desc = [ LEShortEnumField("reason", 1, reason_code) ]
class Dot11AssoReq(Packet):
name = "802.11 Association Request"
fields_desc = [ FlagsField("cap", 0, 16, capability_list),
LEShortField("listen_interval", 0x00c8) ]
class Dot11AssoResp(Packet):
name = "802.11 Association Response"
fields_desc = [ FlagsField("cap", 0, 16, capability_list),
LEShortField("status", 0),
LEShortField("AID", 0) ]
class Dot11ReassoReq(Packet):
name = "802.11 Reassociation Request"
fields_desc = [ FlagsField("cap", 0, 16, capability_list),
LEShortField("listen_interval", 0x00c8),
MACField("current_AP", ETHER_ANY) ]
class Dot11ReassoResp(Dot11AssoResp):
name = "802.11 Reassociation Response"
class Dot11ProbeReq(Packet):
name = "802.11 Probe Request"
class Dot11ProbeResp(Packet):
name = "802.11 Probe Response"
fields_desc = [ LELongField("timestamp", 0),
LEShortField("beacon_interval", 0x0064),
FlagsField("cap", 0, 16, capability_list) ]
class Dot11Auth(Packet):
name = "802.11 Authentication"
fields_desc = [ LEShortEnumField("algo", 0, ["open", "sharedkey"]),
LEShortField("seqnum", 0),
LEShortEnumField("status", 0, status_code) ]
def answers(self, other):
if self.seqnum == other.seqnum+1:
return 1
return 0
class Dot11Deauth(Packet):
name = "802.11 Deauthentication"
fields_desc = [ LEShortEnumField("reason", 1, reason_code) ]
class Dot11WEP(Packet):
name = "802.11 WEP packet"
fields_desc = [ StrFixedLenField("iv", "\0\0\0", 3),
ByteField("keyid", 0),
StrField("wepdata",None,remain=4),
IntField("icv",None) ]
def post_dissect(self, s):
# self.icv, = struct.unpack("!I",self.wepdata[-4:])
# self.wepdata = self.wepdata[:-4]
self.decrypt()
def build_payload(self):
if self.wepdata is None:
return Packet.build_payload(self)
return ""
def post_build(self, p, pay):
if self.wepdata is None:
key = conf.wepkey
if key:
if self.icv is None:
pay += struct.pack("<I",crc32(pay))
icv = ""
else:
icv = p[4:8]
c = ARC4.new(self.iv+key)
p = p[:4]+c.encrypt(pay)+icv
else:
warning("No WEP key set (conf.wepkey).. strange results expected..")
return p
def decrypt(self,key=None):
if key is None:
key = conf.wepkey
if key:
c = ARC4.new(self.iv+key)
self.add_payload(LLC(c.decrypt(self.wepdata)))
bind_layers( PrismHeader, Dot11, )
bind_layers( RadioTap, Dot11, )
bind_layers( PPI, Dot11, dlt=105)
bind_layers( Dot11, LLC, type=2)
bind_layers( Dot11QoS, LLC, )
bind_layers( Dot11, Dot11AssoReq, subtype=0, type=0)
bind_layers( Dot11, Dot11AssoResp, subtype=1, type=0)
bind_layers( Dot11, Dot11ReassoReq, subtype=2, type=0)
bind_layers( Dot11, Dot11ReassoResp, subtype=3, type=0)
bind_layers( Dot11, Dot11ProbeReq, subtype=4, type=0)
bind_layers( Dot11, Dot11ProbeResp, subtype=5, type=0)
bind_layers( Dot11, Dot11Beacon, subtype=8, type=0)
bind_layers( Dot11, Dot11ATIM, subtype=9, type=0)
bind_layers( Dot11, Dot11Disas, subtype=10, type=0)
bind_layers( Dot11, Dot11Auth, subtype=11, type=0)
bind_layers( Dot11, Dot11Deauth, subtype=12, type=0)
bind_layers( Dot11Beacon, Dot11Elt, )
bind_layers( Dot11AssoReq, Dot11Elt, )
bind_layers( Dot11AssoResp, Dot11Elt, )
bind_layers( Dot11ReassoReq, Dot11Elt, )
bind_layers( Dot11ReassoResp, Dot11Elt, )
bind_layers( Dot11ProbeReq, Dot11Elt, )
bind_layers( Dot11ProbeResp, Dot11Elt, )
bind_layers( Dot11Auth, Dot11Elt, )
bind_layers( Dot11Elt, Dot11Elt, )
conf.l2types.register(105, Dot11)
conf.l2types.register_num2layer(801, Dot11)
conf.l2types.register(119, PrismHeader)
conf.l2types.register_num2layer(802, PrismHeader)
conf.l2types.register(127, RadioTap)
conf.l2types.register(0xc0, PPI)
conf.l2types.register_num2layer(803, RadioTap)
class WiFi_am(AnsweringMachine):
"""Before using this, initialize "iffrom" and "ifto" interfaces:
iwconfig iffrom mode monitor
iwpriv orig_ifto hostapd 1
ifconfig ifto up
note: if ifto=wlan0ap then orig_ifto=wlan0
note: ifto and iffrom must be set on the same channel
ex:
ifconfig eth1 up
iwconfig eth1 mode monitor
iwconfig eth1 channel 11
iwpriv wlan0 hostapd 1
ifconfig wlan0ap up
iwconfig wlan0 channel 11
iwconfig wlan0 essid dontexist
iwconfig wlan0 mode managed
"""
function_name = "airpwn"
filter = None
def parse_options(self, iffrom, ifto, replace, pattern="", ignorepattern=""):
self.iffrom = iffrom
self.ifto = ifto
ptrn = re.compile(pattern)
iptrn = re.compile(ignorepattern)
def is_request(self, pkt):
if not isinstance(pkt,Dot11):
return 0
if not pkt.FCfield & 1:
return 0
if not pkt.haslayer(TCP):
return 0
ip = pkt.getlayer(IP)
tcp = pkt.getlayer(TCP)
pay = str(tcp.payload)
if not self.ptrn.match(pay):
return 0
if self.iptrn.match(pay):
return 0
def make_reply(self, p):
ip = p.getlayer(IP)
tcp = p.getlayer(TCP)
pay = str(tcp.payload)
del(p.payload.payload.payload)
p.FCfield="from-DS"
p.addr1,p.addr2 = p.addr2,p.addr1
p /= IP(src=ip.dst,dst=ip.src)
p /= TCP(sport=tcp.dport, dport=tcp.sport,
seq=tcp.ack, ack=tcp.seq+len(pay),
flags="PA")
q = p.copy()
p /= self.replace
q.ID += 1
q.getlayer(TCP).flags="RA"
q.getlayer(TCP).seq+=len(replace)
return [p,q]
def print_reply(self):
print p.sprintf("Sent %IP.src%:%IP.sport% > %IP.dst%:%TCP.dport%")
def send_reply(self, reply):
sendp(reply, iface=self.ifto, **self.optsend)
def sniff(self):
sniff(iface=self.iffrom, **self.optsniff)
plst=[]
def get_toDS():
global plst
while 1:
p,=sniff(iface="eth1",count=1)
if not isinstance(p,Dot11):
continue
if p.FCfield & 1:
plst.append(p)
print "."
# if not ifto.endswith("ap"):
# print "iwpriv %s hostapd 1" % ifto
# os.system("iwpriv %s hostapd 1" % ifto)
# ifto += "ap"
#
# os.system("iwconfig %s mode monitor" % iffrom)
#
def airpwn(iffrom, ifto, replace, pattern="", ignorepattern=""):
"""Before using this, initialize "iffrom" and "ifto" interfaces:
iwconfig iffrom mode monitor
iwpriv orig_ifto hostapd 1
ifconfig ifto up
note: if ifto=wlan0ap then orig_ifto=wlan0
note: ifto and iffrom must be set on the same channel
ex:
ifconfig eth1 up
iwconfig eth1 mode monitor
iwconfig eth1 channel 11
iwpriv wlan0 hostapd 1
ifconfig wlan0ap up
iwconfig wlan0 channel 11
iwconfig wlan0 essid dontexist
iwconfig wlan0 mode managed
"""
ptrn = re.compile(pattern)
iptrn = re.compile(ignorepattern)
def do_airpwn(p, ifto=ifto, replace=replace, ptrn=ptrn, iptrn=iptrn):
if not isinstance(p,Dot11):
return
if not p.FCfield & 1:
return
if not p.haslayer(TCP):
return
ip = p.getlayer(IP)
tcp = p.getlayer(TCP)
pay = str(tcp.payload)
# print "got tcp"
if not ptrn.match(pay):
return
# print "match 1"
if iptrn.match(pay):
return
# print "match 2"
del(p.payload.payload.payload)
p.FCfield="from-DS"
p.addr1,p.addr2 = p.addr2,p.addr1
q = p.copy()
p /= IP(src=ip.dst,dst=ip.src)
p /= TCP(sport=tcp.dport, dport=tcp.sport,
seq=tcp.ack, ack=tcp.seq+len(pay),
flags="PA")
q = p.copy()
p /= replace
q.ID += 1
q.getlayer(TCP).flags="RA"
q.getlayer(TCP).seq+=len(replace)
sendp([p,q], iface=ifto, verbose=0)
# print "send",repr(p)
# print "send",repr(q)
print p.sprintf("Sent %IP.src%:%IP.sport% > %IP.dst%:%TCP.dport%")
sniff(iface=iffrom,prn=do_airpwn)
conf.stats_dot11_protocols += [Dot11WEP, Dot11Beacon, ]
class Dot11PacketList(PacketList):
def __init__(self, res=None, name="Dot11List", stats=None):
if stats is None:
stats = conf.stats_dot11_protocols
PacketList.__init__(self, res, name, stats)
def toEthernet(self):
data = map(lambda x:x.getlayer(Dot11), filter(lambda x : x.haslayer(Dot11) and x.type == 2, self.res))
r2 = []
for p in data:
q = p.copy()
q.unwep()
r2.append(Ether()/q.payload.payload.payload) #Dot11/LLC/SNAP/IP
return PacketList(r2,name="Ether from %s"%self.listname)
|