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# http://trac.secdev.org/scapy/ticket/104
# scapy.contrib.description = WPA EAPOL dissector
# scapy.contrib.status = loads
from scapy.packet import *
from scapy.fields import *
from scapy.layers.l2 import *
class WPA_key(Packet):
name = "WPA_key"
fields_desc = [ ByteField("descriptor_type", 1),
ShortField("key_info",0),
LenField("len", None, "H"),
StrFixedLenField("replay_counter", "", 8),
StrFixedLenField("nonce", "", 32),
StrFixedLenField("key_iv", "", 16),
StrFixedLenField("wpa_key_rsc", "", 8),
StrFixedLenField("wpa_key_id", "", 8),
StrFixedLenField("wpa_key_mic", "", 16),
LenField("wpa_key_length", None, "H"),
StrLenField("wpa_key", "", length_from=lambda pkt:pkt.wpa_key_length) ]
def extract_padding(self, s):
l = self.len
return s[:l],s[l:]
def hashret(self):
return chr(self.type)+self.payload.hashret()
def answers(self, other):
if isinstance(other,WPA_key):
return 1
return 0
bind_layers( EAPOL, WPA_key, type=3)
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