with open('secret.key', 'rb') as my_private_key:
key = my_private_key.read()
h = hmac.new(key, apdu, hashlib.sha256)
if (h.digest() == mac):
f = Fernet(key)
apdu_unen = f.decrypt(apdu)
i = i.load[:11] + apdu_unen
packet[UDP].remove_payload()
packet[UDP].add_payload(i)
else:
print("Compromised Data")
break
g = goose.GOOSE(packet.load)
pl1 = packet.load[:39]
# print (type(pl1))
# print (repr(g.load))
gpdu = goose.GOOSEPDU(g.load[31:])
print(gpdu.__dict__)
stnum = gpdu.__dict__['stNum'].data
if (stnum != prev_stnum):
if (stnum < prev_stnum):
print("Discard because smaller state", stnum)
prevt = gpdu.__dict__['t'].data
continue
age = gpdu.__dict__['t'].data - prevt
if (abs(age) > 640000):
prev_stnum = -1
prevt = -1
while (True):
t = sniff(iface=your_iface,
count=1,
filter="udp and host 10.220.64.207 and port 49153")
# lfilter=lambda x: x.haslayer(UDP))
# and x[IP].src == broad_ip)
t[0].show()
# print (len(t[0].load))
# print (len(t[0][UDP]))
# print (len(t[0][IP]))
# print (len(t[0][Ether]))
# print (type(t))
g = goose.GOOSE(t[0].load)
pl1 = t[0].load[:39]
# print (type(pl1))
# print (repr(g.load))
gpdu = goose.GOOSEPDU(g.load[31:])
print("The R-GOOSE payload is decoded as- ")
print(gpdu.__dict__)
try:
stnum = gpdu.__dict__['stNum'].data
except Exception as e:
print("************************************")
print()
print(" DECODING ERROR")
print()
print("Key not found : ", e)
print()
from scapy.all import *
import goose
a = rdpcap("wireshark2.pcap")
for i in a:
try:
if i.type == 0x88b8:
g = goose.GOOSE(i.load)
print repr(g.load)
gpdu = goose.GOOSEPDU(g.load[4:])
print gpdu.__dict__
except AttributeError:
continue