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Fix channel, rates and extended rates #2

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Fix channel, rates and extended rates #2

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20 changes: 10 additions & 10 deletions snap.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#!/usr/bin/python3

# snap.py v1.0 - trustwave spiderlabs
# snap.py v1.1 - trustwave spiderlabs
# (Snap)shot SHA256 hashes of wireless access points to determine whether something
# has changed since your last visit (e.g. rogue AP), plus detect airbase-ng in use.
#
Expand All @@ -9,23 +9,25 @@

from scapy.layers.dot11 import *
from scapy.sendrecv import sniff
import chardet
import hashlib
import sys

def parse(frame):
if frame.haslayer(Dot11) and frame.type==0 and frame.subtype==8:
print("BSSID:", frame.addr3)
print("SSID:", (frame.info).decode('utf-8'))
channel=int(ord(frame[Dot11Elt:3].info))
channel=frame.channel
print("Channel:", channel)
if frame.haslayer(Dot11EltCountry):
country=(frame[Dot11EltCountry].country_string).decode('utf-8')
else:
country=0
print("Country:", country)
print("Supported Rates:", frame.rates)
erates=frame[Dot11EltRates].info
print("Supported Rates:", [((i%128)/2)for i in frame.rates])
if frame.getlayer(Dot11Elt, ID=50):
erates=[((i%128)/2) for i in frame.getlayer(Dot11Elt, ID=50).rates]
else:
erates=0
print("Extended Rates:", erates)
if frame.haslayer(Dot11EltCountryConstraintTriplet):
power=frame[Dot11EltCountryConstraintTriplet].mtp
Expand All @@ -39,10 +41,8 @@ def parse(frame):
print("Capabilities:", cap)
if frame.haslayer(Dot11EltHTCapabilities):
htmax=frame[Dot11EltHTCapabilities].Max_A_MSDU
ht=frame[Dot11EltHTCapabilities].summary
else:
htmax=0
ht=0
print("Max_A_MSDU:", htmax)
if frame.haslayer(Dot11EltVendorSpecific):
try:
Expand All @@ -52,11 +52,11 @@ def parse(frame):
else:
vendor=0
print("Vendor:", vendor)
all=frame.addr3+str(frame.info)+str(channel)+str(country)+str(vendor)+str(frame.rates)+str(erates)+str(power)+str(cap)+str(htmax)+str(vendor)
all=frame.addr3+str(frame.info)+str(channel)+str(country)+str(frame.rates)+str(erates)+str(power)+str(cap)+str(htmax)+str(vendor)
print("SHA256: "+(hashlib.sha256(all.encode('utf-8')).hexdigest()))
airbasesig=str(country)+str(frame.rates)+str(erates)+str(power)+str(cap)+str(htmax)+str(vendor)
# print("airbase sig: "+(hashlib.sha256(airbasesig.encode('utf-8')).hexdigest()))
if hashlib.sha256(airbasesig.encode('utf-8')).hexdigest()=="4c847490293ea0bf0cf2fe7ddb02703368aaf8e97ffb16455f0365a7497e2de2":
# print("airbase sig: "+(hashlib.sha256(airbasesig.encode('utf-8')).hexdigest()))
if hashlib.sha256(airbasesig.encode('utf-8')).hexdigest()=="f906ffc81f0f45e5eacb681576138e7256b32ec94dc36ca43b45c86351bb10ba":
print("******** AIRBASE-NG DETECTED AT THIS ACCESS POINT ********\n")
else:
print("")
Expand Down