class TUNReader(object):
"""TUN device"""
def __init__(self, tun_dev, tun_addr, tun_remote_addr, tun_nm, tun_mtu, wsfactory):
self.wsfactory = wsfactory
self.tun = TunTapDevice(name=tun_dev, flags=(IFF_TUN|IFF_NO_PI))
self.tun.addr = tun_addr
self.tun.dstaddr = tun_remote_addr
self.tun.netmask = tun_nm
self.tun.mtu = int(tun_mtu)
self.tun.up()
reactor.addReader(self)
logstr = ("Opened TUN device on %s") % (self.tun.name)
log.msg(logstr, logLevel=logging.INFO)
def fileno(self):
return self.tun.fileno()
def connectionLost(self, reason):
log.msg("Connection lost", logLevel=logging.WARN)
def doRead(self):
data = self.tun.read(self.tun.mtu)
self.wsfactory.tunnel_write(data)
def logPrefix(self):
return "TUNReader"
class TunThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(TunThread, self).__init__(*args, **kwargs)
self.running = True
self.tun = TunTapDevice(flags=(IFF_TAP | IFF_NO_PI))
self.tun.addr = '10.5.0.1'
self.tun.netmask = '255.255.0.0'
self.tun.mtu = 1500
self.tun.up()
def run(self):
p = poll()
p.register(self.tun, POLLIN)
try:
while (self.running):
#TODO: log IP headers in the future
pollret = p.poll(1000)
for (f, e) in pollret:
if f == self.tun.fileno() and (e & POLLIN):
buf = self.tun.read(
self.tun.mtu +
18) #MTU doesn't include header or CRC32
if len(buf):
mac = buf[0:6]
if mac == BROADCAST or (ord(mac[0]) & 0x1) == 1:
#print 'sending broadcast frame:'
#print ':'.join('{0:02x}'.format(ord(c)) for c in buf)
for socket in macmap.values():
def send_message():
try:
socket.write_message(str(buf),
binary=True)
except:
pass
loop.add_callback(send_message)
elif macmap.get(mac, False):
def send_message():
try:
macmap[mac].write_message(str(buf),
binary=True)
except:
pass
loop.add_callback(send_message)
else:
print(
"couldn't find recipient for mac %s from %s "
% (':'.join('{0:02x}'.format(ord(c))
for c in mac), ':'.join(
'{0:02x}'.format(ord(c))
for c in buf[6:12])))
except:
print 'closing due to tun error'
finally:
self.tun.close()
class TunThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(TunThread, self).__init__(*args, **kwargs)
self.running = True
self.tun = TunTapDevice(flags=(IFF_TAP | IFF_NO_PI))
self.tun.addr = '10.5.0.1'
self.tun.netmask = '255.255.0.0'
self.tun.mtu = 1500
self.tun.up()
def write(self, message):
self.tun.write(message)
def run(self):
p = poll()
p.register(self.tun, POLLIN)
try:
while (self.running):
#TODO: log IP headers in the future
pollret = p.poll(1000)
for (f, e) in pollret:
if f == self.tun.fileno() and (e & POLLIN):
buf = self.tun.read(
self.tun.mtu +
18) #MTU doesn't include header or CRC32
if len(buf):
mac = buf[0:6]
if mac == BROADCAST or (ord(mac[0]) & 0x1) == 1:
for socket in macmap.values():
def send_message():
try:
socket.rate_limited_downstream(
str(buf))
except:
pass
loop.add_callback(send_message)
elif macmap.get(mac, False):
def send_message():
try:
macmap[mac].rate_limited_downstream(
str(buf))
except:
pass
loop.add_callback(send_message)
except:
logger.error('closing due to tun error')
finally:
self.tun.close()
class TunThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(TunThread, self).__init__(*args, **kwargs)
self.running = True
self.tun = TunTapDevice(flags= (IFF_TAP | IFF_NO_PI))
self.tun.addr = '10.5.0.1'
self.tun.netmask = '255.255.0.0'
self.tun.mtu = 1500
self.tun.up()
def run(self):
p = poll()
p.register(self.tun, POLLIN)
try:
while(self.running):
#TODO: log IP headers in the future
pollret = p.poll(1000)
for (f,e) in pollret:
if f == self.tun.fileno() and (e & POLLIN):
buf = self.tun.read(self.tun.mtu+18) #MTU doesn't include header or CRC32
if len(buf):
mac = buf[0:6]
if mac == BROADCAST or (ord(mac[0]) & 0x1) == 1:
#print 'sending broadcast frame:'
#print ':'.join('{0:02x}'.format(ord(c)) for c in buf)
for socket in macmap.values():
def send_message():
try:
socket.write_message(str(buf),binary=True)
except:
pass
loop.add_callback(send_message)
elif macmap.get(mac, False):
def send_message():
try:
macmap[mac].write_message(str(buf),binary=True)
except:
pass
loop.add_callback(send_message)
else:
print("couldn't find recipient for mac %s from %s " % (':'.join('{0:02x}'.format(ord(c)) for c in mac), ':'.join('{0:02x}'.format(ord(c)) for c in buf[6:12])))
except:
print 'closing due to tun error'
finally:
self.tun.close()
class TunThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(TunThread, self).__init__(*args, **kwargs)
self.running = True
self.tun = TunTapDevice(flags= (IFF_TAP | IFF_NO_PI))
self.tun.addr = '10.5.0.1'
self.tun.netmask = '255.255.0.0'
self.tun.mtu = 1500
self.tun.up()
def write(self, message):
self.tun.write(message)
def run(self):
p = poll()
p.register(self.tun, POLLIN)
try:
while(self.running):
#TODO: log IP headers in the future
pollret = p.poll(1000)
for (f,e) in pollret:
if f == self.tun.fileno() and (e & POLLIN):
buf = self.tun.read(self.tun.mtu+18) #MTU doesn't include header or CRC32
if len(buf):
mac = buf[0:6]
if mac == BROADCAST or (ord(mac[0]) & 0x1) == 1:
for socket in macmap.values():
def send_message():
try:
socket.rate_limited_downstream(str(buf))
except:
pass
loop.add_callback(send_message)
elif macmap.get(mac, False):
def send_message():
try:
macmap[mac].rate_limited_downstream(str(buf))
except:
pass
loop.add_callback(send_message)
except:
logger.error('closing due to tun error')
finally:
self.tun.close()
class TUNReader(object):
"""TUN device"""
def __init__(self, tun_dev, tun_addr, tun_remote_addr, tun_nm, tun_mtu, wsfactory):
self.wsfactory = wsfactory
try:
self.tun = TunTapDevice(name=tun_dev, flags=(IFF_TUN|IFF_NO_PI))
except:
log.msg("Couldn't open the TUN device. Are you root? Is the interface already in use?", logLevel=logging.WARN)
sys.exit(ERR)
self.tun.addr = tun_addr
self.addr = tun_addr # used by mtcrypt
self.tun.dstaddr = tun_remote_addr
self.tun.netmask = tun_nm
self.tun.mtu = int(tun_mtu)
self.tun.up()
reactor.addReader(self)
logstr = ("Opened TUN device on %s") % (self.tun.name)
log.msg(logstr, logLevel=logging.INFO)
def fileno(self):
return self.tun.fileno()
def connectionLost(self, reason):
log.msg("Connection lost", logLevel=logging.INFO)
def doRead(self):
"""Read from host, send to WS to be sent to distant end"""
data = self.tun.read(self.tun.mtu)
self.wsfactory.tunnel_write(data)
def doWrite(self, data):
self.tun.write(data)
def logPrefix(self):
return "TUNReader"
from tornado import ioloop
from ws4py.client.tornadoclient import TornadoWebSocketClient
from pytun import TunTapDevice, IFF_TAP, IFF_NO_PI
import sys
io_loop = ioloop.IOLoop.instance()
tap = TunTapDevice(flags=IFF_TAP|IFF_NO_PI, name='vpn-ws%d')
class VpnWSClient(TornadoWebSocketClient):
def received_message(self, m):
tap.write(str(m))
def closed(self, code, reason=None):
print "ooops"
ws = VpnWSClient(sys.argv[1])
ws.connect()
def tap_callback(fd, event):
ws.send(tap.read(tap.mtu), binary=True)
io_loop.add_handler(tap.fileno(), tap_callback, io_loop.READ)
io_loop.start()
from tornado import ioloop
from ws4py.client.tornadoclient import TornadoWebSocketClient
from pytun import TunTapDevice, IFF_TAP, IFF_NO_PI
import sys
io_loop = ioloop.IOLoop.instance()
tap = TunTapDevice(flags=IFF_TAP | IFF_NO_PI, name='vpn-ws%d')
class VpnWSClient(TornadoWebSocketClient):
def received_message(self, m):
tap.write(str(m))
def closed(self, code, reason=None):
print "ooops"
ws = VpnWSClient(sys.argv[1])
ws.connect()
def tap_callback(fd, event):
ws.send(tap.read(tap.mtu), binary=True)
io_loop.add_handler(tap.fileno(), tap_callback, io_loop.READ)
io_loop.start()
class QRTun(object):
def __init__(self, side):
self.side = int(side)
if self.side not in [1, 2]:
print("Side must be 1 or 2")
raise Exception("Invalid Side")
self.tun = TunTapDevice(flags=IFF_TUN | IFF_NO_PI,
name='qrtun%d' % self.side)
self.tun.addr = '10.0.8.%d' % (self.side)
if self.side == 1:
self.other_side = 2
else:
self.other_side = 1
self.tun.netmask = '255.255.255.0'
#MTU must be set low enough to fit in a single qrcode
self.tun.mtu = 500
self.epoll = select.epoll()
self.epoll.register(self.tun.fileno(), select.EPOLLIN)
self.tun.up()
#self.outfile = 'resources/toscreen%d.png'%(self.side)
self.outfile = None
self.infile = 'resources/toscreen%d.png' % (self.other_side)
self.indata = None
self.olddata = ""
self.outdata = ""
self.running = False
self.qr = qrtools.QR()
self.vc = cv2.VideoCapture(0)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 720)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1280)
pygame.init()
pygame.event.set_allowed(None)
pygame.event.set_allowed([pygame.KEYDOWN, pygame.QUIT])
self.screen = pygame.display.set_mode((SIZE, SIZE))
self.scale = 12
pygame.display.set_caption("qrtun - QR Code scale %d" % (self.scale))
def read_tun(self):
events = self.epoll.poll(0)
if events:
self.outdata = self.tun.read(self.tun.mtu)
return True
return False
def write_qrcode(self):
p = subprocess.Popen(
['qrencode', '-o', '-', '-s',
str(self.scale), '-8'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
std_out, std_err = p.communicate(input=self.outdata)
if std_err:
raise Exception("qrencodeError", std_err.strip())
self.outfile = StringIO.StringIO(std_out)
#code.png(self.outfile, scale=self.scale)
self.outfile.seek(0)
if self.outfile and not self.outfile.closed:
pimg = pygame.image.load(self.outfile)
if pimg.get_width() > self.screen.get_width() or pimg.get_height(
) > self.screen.get_height():
pygame.display.set_mode((pimg.get_width(), pimg.get_height()))
self.screen.fill((0, 0, 0))
self.screen.blit(pimg, (0, 0))
pygame.display.flip()
self.msg_read = False
def write_tun(self):
try:
if len(self.indata.get('body')) > 0:
data = self.indata.get('body')
if data != self.olddata:
self.tun.write(data)
#This is a hacky way to avoid dup packets...
#surely a better way to do this...
self.olddata = data
except:
print("Failed to write to tun!")
def read_qrcode(self):
qr = qrtools.QR()
try:
if not qr.decode(self.infile):
return False
#Hack to convert unicde to python string
body = qr.data.encode('latin-1')
self.indata = {'body': body}
self.write_tun()
except:
pass
def run(self):
self.running = True
while self.running:
if self.read_tun():
self.write_qrcode()
rval, frame = self.vc.read()
if not rval:
running = False
break
scipy.misc.toimage(frame).save(self.infile)
self.read_qrcode()
event = pygame.event.poll()
if event.type == pygame.QUIT:
self.running = False
pygame.quit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
self.running = False
pygame.quit()
elif event.key == pygame.K_UP:
self.scale += 1
pygame.display.set_caption("qrtun - QR Code scale %d" %
(self.scale))
self.write_qrcode()
elif event.key == pygame.K_DOWN:
self.scale -= 1
pygame.display.set_caption("qrtun - QR Code scale %d" %
(self.scale))
self.write_qrcode()
try:
#os.unlink(self.outfile)
os.unlink(self.infile)
except:
pass
# 'socket' : conn,
# 'kill_signal' : False,
# 'CN' : 'client'
# }
active_connections = []
rate_per_key = 10 # frames per second
max_capacity = 20 # token capacity - defines burst size
buckets = token_bucket.Limiter(rate_per_key, max_capacity,
token_bucket.MemoryStorage())
# Initialize a TAP interface and make it non-blocking
tap = TunTapDevice(flags=IFF_TAP | IFF_NO_PI, name='tap0')
tap.up()
fcntl.fcntl(tap.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
tap_thread = threading.Thread(target=ThreadTapFunction,
args=(
tap,
active_connections,
))
tap_thread.daemon = True
tap_thread.start()
t = threading.Thread(target=ServerFunction,
args=(
listen_addr,
listen_port,
active_connections,
buckets,
class QRTun(object):
def __init__(self, side):
self.side = int(side)
if self.side not in [1, 2]:
print("Side must be 1 or 2")
raise Exception("Invalid Side")
self.tun = TunTapDevice(flags=IFF_TUN | IFF_NO_PI,
name='qrtun%d' % self.side)
self.tun.addr = '10.0.8.%d' % (self.side)
if self.side == 1:
self.other_side = 2
else:
self.other_side = 1
self.tun.netmask = '255.255.255.0'
#MTU must be set low enough to fit in a single qrcode
self.tun.mtu = 500
self.epoll = select.epoll()
self.epoll.register(self.tun.fileno(), select.EPOLLIN)
self.tun.up()
self.seq = 0
self.ack = 0
self.outfile = 'resources/toscreen%d.png' % (self.side)
self.infile = 'resources/toscreen%d.png' % (self.other_side)
self.indata = None
self.olddata = ""
self.outdata = ""
self.msg_read = True
self.sent_time = None
self.running = False
self.qr = qrtools.QR()
self.vc = cv2.VideoCapture(0)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 720)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1280)
def read_tun(self):
events = self.epoll.poll(0)
if events:
self.outdata = self.tun.read(self.tun.mtu)
def write_qrcode(self):
#Have a header with seq/ack format
header = '%03d/%03d' % (self.seq, self.ack)
#Base32 encode since alphanumeic qr code only allows A-Z, 0-9 and some
# symbols, but base64 uses lowercase as well....
body = base64.b32encode(self.outdata).replace('=', '/')
qr = qrtools.QR()
qrb = qrtools.QR()
qrb.data = " "
qr.data = header + body
#Had an issue where decoded data did not match encoded data...
#So I just add plus symbols as padding until they match, then strip
# on the other side....
while qr.data != qrb.data:
qr.pixel_size = 12
qr.encode(self.outfile)
qrb.decode(self.outfile)
if qrb.data != qr.data:
print("EncodingFailure", qr.data)
qr.data += '+'
self.msg_read = False
def write_tun(self):
try:
if len(self.indata.get('body')) > 0:
data = self.indata.get('body')
if data != self.olddata:
self.tun.write(data)
#This is a hacky way to avoid dup packets...
#Didn't think my seq/ack through very well, there is
#surely a better way to do this...
self.olddata = data
except:
print("Failed to write to tun!")
def read_qrcode(self):
qr = qrtools.QR()
try:
if not qr.decode(self.infile):
return False
header = map(int, qr.data[:7].split('/'))
body = base64.b32decode(qr.data[7:].replace('/',
'=').replace('+', ''))
self.indata = {'header': header, 'body': body}
#We read their message, need to ack that, unless we already saw it
if self.ack != header[0]:
# print("New Message")
self.ack = header[0]
self.write_tun()
#Have they ready my message already?
if header[1] == self.seq:
print("Acked %d" % self.seq)
self.msg_read = True
self.seq += 1
if self.seq == 1000:
self.seq = 0
except:
pass
def run(self):
self.running = True
while self.running:
if self.msg_read:
self.read_tun()
#Very inefficient right now, constantly rewriting qr code,
# even if nothing has changed....
self.write_qrcode()
rval, frame = self.vc.read()
if not rval:
running = False
break
scipy.misc.toimage(frame).save(self.infile)
self.read_qrcode()
sprite = factory.from_image(self.outfile)
#cam = factory.from_image(self.infile)
# spriterenderer.render(cam)
spriterenderer.render(sprite)
event = SDL_Event()
while SDL_PollEvent(ctypes.byref(event)) != 0:
if event.type == SDL_QUIT:
self.running = False
break
elif event.type == SDL_KEYDOWN and event.key.keysym.sym == SDLK_ESCAPE:
self.running = False
break
try:
os.unlink(self.outfile)
os.unlink(self.infile)
except:
pass
desire_time = 1
#################################################################
import select
import time
from scapy.all import IP, ICMP
from pytun import TunTapDevice, IFF_TAP, IFF_TUN, IFF_NO_PI
tun = TunTapDevice(flags=IFF_TUN | IFF_NO_PI, name="FakePing")
tun.addr = "10.10.10.1"
tun.netmask = '255.255.255.0'
tun.up()
epoll = select.epoll()
epoll.register(tun.fileno(), select.EPOLLIN)
while True:
while epoll.poll(0):
data = tun.read(tun.mtu)
packet = IP(data)
icmp_part = packet.getlayer(ICMP)
if icmp_part is not None:
time.sleep(desire_time)
respacket = IP(src=packet.dst, dst=packet.src, ttl=desire_ttl)
respacket /= ICMP(type=0, seq=icmp_part.seq, id=icmp_part.id)
respacket /= icmp_part.payload
tun.write(bytes(respacket))
packet.show()
class QRTun(object):
def __init__(self, side):
self.side = int(side)
if self.side not in [1,2]:
print("Side must be 1 or 2")
raise Exception("Invalid Side")
self.tun = TunTapDevice(flags=IFF_TUN|IFF_NO_PI, name='qrtun%d'%self.side)
self.tun.addr = '10.0.8.%d'%(self.side)
if self.side == 1:
self.other_side = 2
else:
self.other_side = 1
self.tun.netmask = '255.255.255.0'
#MTU must be set low enough to fit in a single qrcode
self.tun.mtu = 300
self.epoll = select.epoll()
self.epoll.register(self.tun.fileno(), select.EPOLLIN)
self.tun.up()
#self.outfile = 'resources/toscreen%d.png'%(self.side)
self.outfile = None
self.infile = 'resources/toscreen%d.png'%(self.other_side)
self.indata = None
self.olddata = ""
self.outdata = ""
self.running = False
self.vc = cv2.VideoCapture(0)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 720)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1280)
self.scanner = zbar.ImageScanner()
self.scanner.parse_config('enable')
pygame.init()
pygame.event.set_allowed(None)
pygame.event.set_allowed([pygame.KEYDOWN, pygame.QUIT])
self.screen = pygame.display.set_mode((SIZE, SIZE))
self.scale = 12
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
def read_tun(self):
events = self.epoll.poll(0)
if events:
self.outdata = self.tun.read(self.tun.mtu)
return True
return False
def write_qrcode(self):
#Sadly qrencode does not support \0 in binary mode!!! So I had to disable it and use the slower pyqrtools instead!
#p = subprocess.Popen(['qrencode', '-o', '-', '-s', str(self.scale), '-8'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
#std_out, std_err = p.communicate(input=self.outdata)
#if std_err:
# raise Exception("qrencodeError", std_err.strip())
code = pyqrcode.create(b32encode(self.outdata).replace('=', '/'), mode='alphanumeric')
self.outfile = StringIO.StringIO()
code.png(self.outfile, scale=self.scale)
self.outfile.seek(0)
if self.outfile and not self.outfile.closed:
pimg = pygame.image.load(self.outfile)
if pimg.get_width() > self.screen.get_width() or pimg.get_height() > self.screen.get_height():
pygame.display.set_mode((pimg.get_width(), pimg.get_height()))
self.screen.fill((0,0,0))
self.screen.blit(pimg, (0,0))
pygame.display.flip()
self.msg_read = False
def write_tun(self):
try:
if len(self.indata.get('body')) > 0:
data = self.indata.get('body')
if data != self.olddata:
self.tun.write(data)
#This is a hacky way to avoid dup packets...
#surely a better way to do this...
self.olddata = data
except:
print("Failed to write to tun!")
def read_qrcode(self):
width, height = self.inframe.size
raw = self.inframe.tobytes()
image = zbar.Image(width, height, 'Y800', raw)
result = self.scanner.scan(image)
if result == 0:
return False
else:
print "QR!"
for symbol in image:
pass
# clean up
del(image)
# Assuming data is encoded in utf8
try:
self.indata = {'body': b32decode(symbol.data.replace('/', '='))}
self.write_tun()
return True
except:
return False
def read_cam(self):
rval, frame = self.vc.read()
if not rval:
return False
self.inframe = scipy.misc.toimage(frame).convert('L')
return True
def run(self):
self.running = True
while self.running:
if self.read_tun():
self.write_qrcode()
if not self.read_cam():
running = False
break
self.read_qrcode()
event = pygame.event.poll()
if event.type == pygame.QUIT:
self.running = False
pygame.quit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
self.running = False
pygame.quit()
elif event.key == pygame.K_UP:
self.scale += 1
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
self.write_qrcode()
elif event.key == pygame.K_DOWN:
self.scale -= 1
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
self.write_qrcode()
try:
#os.unlink(self.outfile)
os.unlink(self.infile)
except:
pass
class TLSTunnel():
def initialize (self):
# parse arguments
parser = argparse.ArgumentParser(description='TLS tunnel client')
parser.add_argument('--mode', dest='mode', type=str, default="server")
parser.add_argument('--priv_net_addr', dest='priv_net_addr', type=str, default='')
parser.add_argument('--tap_mtu', dest='tap_mtu', type=int, default=1500)
# server
parser.add_argument('--listen_addr', dest='listen_addr', default = '0.0.0.0')
parser.add_argument('--listen_port', dest='listen_port', type=int, default= 8082)
parser.add_argument('--tb_rate', dest='tb_rate', type=int, default= 100)
parser.add_argument('--tb_burst', dest='tb_burst', type=int, default= 1000)
# client
parser.add_argument('--server_addr', dest='server_addr', default = 'localhost')
parser.add_argument('--server_port', dest='server_port', type=int, default= 8082)
parser.add_argument('--server_sni_hostname', dest='server_sni_hostname', default = 'tunnel-server')
self.args = parser.parse_args()
self.tap_mtu = self.args.tap_mtu
if self.args.mode == 'client':
print("**Client**")
self.server_port = self.args.server_port
self.server_sni_hostname = self.args.server_sni_hostname
self.server_cert = '/root/environments/tls/certs/server.crt'
self.client_cert = '/root/environments/tls/certs/client.crt'
self.client_key = '/root/environments/tls/certs/client.key'
self.pkts_rcvd = [0]
self.pkts_sent = 0
elif self.args.mode == 'server':
print("**Server**")
self.server_cert = '/root/environments/tls/certs/server.crt'
self.server_key = '/root/environments/tls/certs/server.key'
self.client_certs_path = '/root/environments/tls/certs/'
self.tb_rate = self.args.tb_rate
self.tb_burst = self.args.tb_burst
self.context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
self.context.verify_mode = ssl.CERT_REQUIRED
self.context.load_cert_chain(certfile=self.server_cert, keyfile=self.server_key)
self.context.load_verify_locations(capath=self.client_certs_path)
# List of active connections - dicts, with IP, port, socket object,
# thread signal (to kill corresponding thread), and Common Name
# example_connection = {
# 'ip' : '10.0.0.2',
# 'port' : 2000,
# 'socket' : conn,
# 'kill_signal' : False,
# 'CN' : 'client'
# }
self.active_connections = []
else:
print("Unnown mode -- choose between client and server")
def create_tap(self):
# identify interface for bridging, will may take some time to be created
def get_interface_for_ip(addr):
mon_if_name = ''
addrs = psutil.net_if_addrs()
for netif in addrs:
for iface in addrs[netif]:
#print (str(iface.family))
if str(iface.family) == 'AddressFamily.AF_INET':
ip_addr = ipaddress.IPv4Network((addrs[netif][0].address, addrs[netif][0].netmask), strict=False)
print(ip_addr.network_address)
if self.args.priv_net_addr.split('/')[0] == str(addrs[netif][0].address):
mon_if_name = netif
break
return mon_if_name
mon_if_name = get_interface_for_ip (self.args.priv_net_addr)
while mon_if_name == '' or mon_if_name is None:
print("waiting for interface to be active " + self.args.priv_net_addr)
r("/bin/sleep 2s")
mon_if_name = get_interface_for_ip (self.args.priv_net_addr)
# create tap
self.tap_interface = 'tap0'
addrs = psutil.net_if_addrs()
if mon_if_name == '':
print ('No interface specified')
elif self.tap_interface not in addrs:
print('Creating tap ' + self.tap_interface + ' for ' + mon_if_name)
#os.system("/root/environments/tls/start-tap.sh " + mon_if_name + " 10.0.2.2/24")
r("mkdir /dev/net")
r("mknod /dev/net/tun c 10 200")
r("ip tuntap add tap0 mode tap")
r("brctl addbr br0")
r("ip link set tap0 up")
r("ip link set br0 up")
r("brctl addif br0 tap0")
r("brctl addif br0 " + mon_if_name)
r("ip addr del " + self.args.priv_net_addr + " dev " + mon_if_name)
r("ip addr add " + self.args.priv_net_addr + " dev br0")
else:
print('Tap already created')
# Initialize a TAP interface and make it non-blocking
self.tap = TunTapDevice(flags = IFF_TAP|IFF_NO_PI, name=self.tap_interface); self.tap.up()
fcntl.fcntl(self.tap.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
self.tap.mtu = self.tap_mtu
def srvThreadTapReadFunction(tap,conn_list):
# Check for packets in tap interface and send them to every active connection
print("Tap thread started")
while True:
try:
# +20 for ethernet headear
packet = tap.read(tap.mtu + 20)
# Insert first 3 bytes with 0 and 2 byte big endian int with actual size.
l = len(packet)
b_packet_length = l.to_bytes(2, byteorder='big')
bb1 = bytearray(b'\x00')
bb2 = bytearray(b_packet_length)
bb3 = bytearray(packet)
buf = bytes(bb1+bb2+bb3)
except Exception as e:
if e.args[0] == errno.EAGAIN or e.args[0] == errno.EWOULDBLOCK:
# Not an actual error, just no data to read yet
# (this is expected, wait some more)
sleep(0.1)
# If we wish to insert a "fake packet", fill 'buf'
# Otherwise, "continue", forcing a new tap read
continue
else:
# Actual error - raise!
print(e)
raise
for conn in conn_list:
# Do not send when client is not the destination? / Apply some filtering here.
# Decide if we should add padding to a given packet.
if conn['kill_signal'] == False:
try:
conn['socket'].send(buf)
except OSError as exc:
print("Error while sending data to {}:{} ({})".format(conn['ip'], conn['port'], conn['CN']))
if exc.errno == errno.EPIPE:
print("Broken pipe. Sending kill signal...")
conn['kill_signal'] = True
# per client read from ssl and write into tap
def srvThreadTapWrite(self, clientsocket, addr, clienttap, conn_list, buckets):
print("New TCP Connection: {}:{}".format(addr[0], addr[1]))
try:
conn = self.context.wrap_socket(clientsocket, server_side=True)
except Exception as e:
print("SSL connection not established.")
print(e)
print("")
return
print("SSL established.")
print("Peer: {}".format(conn.getpeercert()))
new_conn = {
'ip' : addr[0],
'port' : addr[1],
'socket' : conn,
'kill_signal' : False,
'CN' : [cn for ((n,cn),) in conn.getpeercert()['subject'] if n == 'commonName'][0]
}
conn_list.append(new_conn)
conn.setblocking(0)
while new_conn['kill_signal'] == False:
try:
# timestamp and add tokens to bucket
ready = select.select([conn], [], [], 0.1)
if ready[0]:
data = self.get_packet_from_tls(conn)
# data = conn.recv(clienttap.mtu)
if data:
if buckets.consume(new_conn['CN']):
#print("tb OK", new_conn['CN'], buckets._storage.get_token_count(new_conn['CN']))
# Remove padding or fake packets. First bytes 2 dictate real size.
# Also, apply a firewall here! (decide if a packet coming
# from the TLS tunnel should go to the network interface)
clienttap.write(data)
else:
#print("tb XX", new_conn['CN'], buckets._storage.get_token_count(new_conn['CN']))
pass
else:
sleep(0.05)
except OSError as exc:
if exc.errno == errno.ENOTCONN:
print("Connection to {} closed by remote host.".format(addr[0]))
break
conn_list.remove(new_conn)
try:
conn.shutdown(socket.SHUT_RDWR)
conn.close()
print("Connection to {}:{} ({}) closed.".format(new_conn['ip'], new_conn['port'], new_conn['CN']))
except:
pass
def srvThreadServerFunction(self, listen_addr, listen_port, conn_list, buckets):
bindsocket = socket.socket()
bindsocket.bind((listen_addr, listen_port))
bindsocket.listen(5)
print("Waiting for clients")
# Wait for new connections and serve them, creating a thread for each client
while True:
newsocket, fromaddr = bindsocket.accept() # blocking call
client_thread = threading.Thread(target=self.srvThreadTapWrite, args=(newsocket,fromaddr,self.tap,conn_list,buckets,))
client_thread.daemon = True; client_thread.start()
def srvThreadCLI(clientsocket, addr, clienttap, conn_list):
print("Available commands: close, block, list, exit")
while True:
try:
inp = input('>> ')
if inp == "close":
print("\nActive connections:")
for i, connection in enumerate(active_connections):
print("{} - {}:{} ({})".format(i, connection['ip'], connection['port'], connection['CN']))
chosen_connection = input("Which connection to close? [0-{}] >> ".format(len(active_connections)-1))
try:
c = active_connections[int(chosen_connection)]
except:
pass
else:
confirmation = input("Terminate connection to {}:{} ({})? (Y/n) >> ".format(c['ip'], c['port'], c['CN']))
if confirmation != "N" and confirmation != "n":
c['kill_signal'] = True
print("Kill signal sent.")
elif inp == "block":
print("\nActive clients:")
cn_list = list(set([conn['CN'] for conn in active_connections]))
for i, client in enumerate(cn_list):
print("{} - {}".format(i, client))
chosen_connection = input("Which certificate to block? [0-{}] >> ".format(len(cn_list)-1))
try:
chosen_cn = cn_list[int(chosen_connection)]
except:
pass
else:
confirmation = input("Terminate every connection from client [{}]? (Y/n) >> ".format(chosen_cn))
if confirmation != "N" and confirmation != "n":
for conn in active_connections:
if conn['CN'] == chosen_cn:
conn['kill_signal'] = True
print("Kill signal sent to {}:{}.".format(conn['ip'], conn['port']))
elif inp == "list":
print("\nActive connections:")
for i, connection in enumerate(active_connections):
print("{} - {}:{} ({})".format(i, connection['ip'], connection['port'], connection['CN']))
print("\nActive clients:")
cn_list = list(set([conn['CN'] for conn in active_connections]))
for i, client in enumerate(cn_list):
print("{} - {}".format(i, client))
elif inp == "update":
context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.verify_mode = ssl.CERT_REQUIRED
context.load_cert_chain(certfile=server_cert, keyfile=server_key)
context.load_verify_locations(capath=client_certs_path)
print("Updating client certificates...")
elif inp == "exit":
print("Terminating server. Closing connections...")
for connection in active_connections:
connection['kill_signal'] = True
sleep(3)
break
except KeyboardInterrupt as e:
print("\nKeyboard interrupt detected. Aborting.")
for connection in active_connections:
connection['kill_signal'] = True
sleep(3)
break
def cliThreadTapReadFunction(self, conn):
# Check for packets in tap interface and send them to every active connection
print("Tap thread started")
while True:
try:
# +20 for ethernet headear
packet = self.tap.read(self.tap.mtu+20)
# Insert first 3 bytes with 0 and 2 byte big endian int with actual size.
l = len(packet)
b_packet_length = l.to_bytes(2, byteorder='big')
bb1 = bytearray(b'\x00')
bb2 = bytearray(b_packet_length)
bb3 = bytearray(packet)
buf = bytes(bb1+bb2+bb3)
except Exception as e:
if e.args[0] == errno.EAGAIN or e.args[0] == errno.EWOULDBLOCK:
# Not an actual error, just no data to read yet
# (this is expected, wait some more)
sleep(0.1)
# If we wish to insert a "fake packet", fill 'buf'
# Otherwise, "continue", forcing a new tap read
continue
else:
# Actual error - raise!
print(e)
raise
try:
conn.send(buf)
self.pkts_rcvd[0] = self.pkts_rcvd[0]+1
except OSError as exc:
print("Error while sending data".format())
if exc.errno == errno.EPIPE:
print("Broken pipe. Sending kill signal...")
# assume connection is blocking
def get_packet_from_tls(self, conn):
# get first 3 bytes with '\x00' and 2 byte big endian int
data = conn.recv(3)
if data and len(data) == 3:
check = data[0]
if check == 0:
packet_length = int.from_bytes(data[1:3], "big")
packet = conn.recv(packet_length)
return packet
else:
return False
return False
def cliTapWriteFunction(self, conn):
while True:
try:
data = self.get_packet_from_tls(conn)
if data:
self.tap.write(data)
self.pkts_sent+=1
#print("\rPackets sent:\t{:7d} | Packets received:\t{:7d}".format(self.pkts_sent, self.pkts_rcvd[0]), end='')
except Exception as e:
print("Exception occurred " + str(e))
raise
break
def cli_start_new_client(self):
self.server_addr = resolve_hostname(self.args.server_addr)
print("Connecting to TLS server at " + self.server_addr)
context = ssl.create_default_context(ssl.Purpose.SERVER_AUTH, cafile=self.server_cert)
context.load_cert_chain(certfile=self.client_cert, keyfile=self.client_key)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
conn = context.wrap_socket(s, server_side=False, server_hostname=self.server_sni_hostname)
conn.connect((self.server_addr, self.server_port))
print("SSL Connection Established.")
t = threading.Thread(target=self.cliThreadTapReadFunction, args=(conn,))
t.daemon = True
t.start()
self.cliTapWriteFunction(conn)
class QRTun(object):
def __init__(self, side):
self.side = int(side)
if self.side not in [1,2]:
print("Side must be 1 or 2")
raise Exception("Invalid Side")
self.tun = TunTapDevice(flags=IFF_TUN|IFF_NO_PI, name='qrtun%d'%self.side)
self.tun.addr = '10.0.8.%d'%(self.side)
if self.side == 1:
self.other_side = 2
else:
self.other_side = 1
self.tun.netmask = '255.255.255.0'
#MTU must be set low enough to fit in a single qrcode
self.tun.mtu = 300
self.epoll = select.epoll()
self.epoll.register(self.tun.fileno(), select.EPOLLIN)
self.tun.up()
#self.outfile = 'resources/toscreen%d.png'%(self.side)
self.outfile = None
self.infile = 'resources/toscreen%d.png'%(self.other_side)
self.indata = None
self.olddata = ""
self.outdata = ""
self.running = False
self.vc = cv2.VideoCapture(0)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 720)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1280)
self.scanner = zbar.ImageScanner()
self.scanner.parse_config('enable')
pygame.init()
pygame.event.set_allowed(None)
pygame.event.set_allowed([pygame.KEYDOWN, pygame.QUIT])
self.screen = pygame.display.set_mode((SIZE, SIZE))
self.scale = 12
self.display_cam = False
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
def read_tun(self):
events = self.epoll.poll(0)
if events:
self.outdata = self.tun.read(self.tun.mtu)
return True
return False
def write_qrcode(self):
p = subprocess.Popen(['qrencode', '-o', '-', '-s', str(self.scale)], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
std_out, std_err = p.communicate(input=b32encode(self.outdata).replace('=', '/'))
if std_err:
raise Exception("qrencodeError", std_err.strip())
self.outfile = StringIO.StringIO(std_out)
if self.display_cam:
cimg = StringIO.StringIO()
self.inframe.save(cimg, 'png')
cimg.seek(0)
cpimg = pygame.image.load(cimg)
self.screen.blit(cpimg, (0,0))
pygame.display.flip()
else:
if self.outfile and not self.outfile.closed:
pimg = pygame.image.load(self.outfile)
if pimg.get_width() > self.screen.get_width() or pimg.get_height() > self.screen.get_height():
pygame.display.set_mode((pimg.get_width(), pimg.get_height()))
self.screen.fill((0,0,0))
self.screen.blit(pimg, (0,0))
pygame.display.flip()
self.msg_read = False
def write_tun(self):
try:
if len(self.indata.get('body')) > 0:
data = self.indata.get('body')
if data != self.olddata:
self.tun.write(data)
#This is a hacky way to avoid dup packets...
#surely a better way to do this...
self.olddata = data
except:
print("Failed to write to tun!")
def read_qrcode(self):
p = subprocess.Popen(['zbarimg', '-q', '--raw', 'PNG:-'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
temp_png = StringIO.StringIO()
self.inframe.save(temp_png, 'png')
std_out, std_err = p.communicate(input=temp_png.getvalue())
if len(std_out) == 0:
return False
if std_err:
raise Exception("zbarimg", std_err.strip())
#p = subprocess.Popen(['iconv', '-f', 'UTF-8', '-t', 'ISO-8859-1'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
#std_out, std_err = p.communicate(input=std_out)
#if std_err:
# raise Exception("iconv", std_err.strip())
try:
self.indata = {'body': b32decode(std_out.rstrip().replace('/', '='))}
self.write_tun()
except:
pass
def read_cam(self):
rval, frame = self.vc.read()
if not rval:
return False
self.inframe = scipy.misc.toimage(frame).convert('L')
print "CAM"
return True
def run(self):
self.running = True
while self.running:
if self.read_tun() or self.display_cam:
self.write_qrcode()
if not self.read_cam():
running = False
break
self.read_qrcode()
event = pygame.event.poll()
if event.type == pygame.QUIT:
self.running = False
pygame.quit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
self.running = False
pygame.quit()
elif event.key == pygame.K_UP:
self.scale += 1
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
self.write_qrcode()
elif event.key == pygame.K_DOWN:
self.scale -= 1
pygame.display.set_caption("qrtun - QR Code scale %d"%(self.scale))
self.write_qrcode()
elif event.key == pygame.K_SPACE:
self.display_cam = not self.display_cam
self.write_qrcode()
try:
#os.unlink(self.outfile)
os.unlink(self.infile)
except:
pass
class QRTun(object):
def __init__(self, side):
self.side = int(side)
if self.side not in [1, 2]:
print("Side must be 1 or 2")
raise Exception("Invalid Side")
self.tun = TunTapDevice(flags=IFF_TUN | IFF_NO_PI,
name='qrtun%d' % self.side)
self.tun.addr = '10.0.8.%d' % (self.side)
if self.side == 1:
self.other_side = 2
else:
self.other_side = 1
self.tun.netmask = '255.255.255.0'
#MTU must be set low enough to fit in a single qrcode
self.tun.mtu = 500
self.epoll = select.epoll()
self.epoll.register(self.tun.fileno(), select.EPOLLIN)
self.tun.up()
self.outfile = 'resources/toscreen%d.png' % (self.side)
self.infile = 'resources/toscreen%d.png' % (self.other_side)
self.indata = None
self.olddata = ""
self.outdata = ""
self.running = False
self.qr = qrtools.QR()
self.vc = cv2.VideoCapture(0)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 720)
self.vc.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1280)
def read_tun(self):
events = self.epoll.poll(0)
if events:
self.outdata = self.tun.read(self.tun.mtu)
return True
return False
def write_qrcode(self):
#Base32 encode since alphanumeic qr code only allows A-Z, 0-9 and some
# symbols, but base64 uses lowercase as well....
body = base64.b32encode(self.outdata).replace('=', '/')
qr = qrtools.QR()
qrb = qrtools.QR()
qrb.data = " "
qr.data = body
#Had an issue where decoded data did not match encoded data...
#So I just add plus symbols as padding until they match, then strip
# on the other side....
while qr.data != qrb.data:
qr.pixel_size = 12
qr.encode(self.outfile)
qrb.decode(self.outfile)
if qrb.data != qr.data:
print("EncodingFailure", qr.data)
qr.data += '+'
self.msg_read = False
def write_tun(self):
try:
if len(self.indata.get('body')) > 0:
data = self.indata.get('body')
if data != self.olddata:
self.tun.write(data)
#This is a hacky way to avoid dup packets...
#surely a better way to do this...
self.olddata = data
except:
print("Failed to write to tun!")
def read_qrcode(self):
qr = qrtools.QR()
try:
if not qr.decode(self.infile):
return False
body = base64.b32decode(qr.data.replace('/', '=').replace('+', ''))
self.indata = {'body': body}
self.write_tun()
except:
pass
def run(self):
self.running = True
while self.running:
if self.read_tun():
self.write_qrcode()
rval, frame = self.vc.read()
if not rval:
running = False
break
scipy.misc.toimage(frame).save(self.infile)
self.read_qrcode()
if os.path.isfile(self.outfile):
sprite = factory.from_image(self.outfile)
spriterenderer.render(sprite)
event = SDL_Event()
while SDL_PollEvent(ctypes.byref(event)) != 0:
if event.type == SDL_QUIT:
self.running = False
break
elif event.type == SDL_KEYDOWN and event.key.keysym.sym == SDLK_ESCAPE:
self.running = False
break
try:
os.unlink(self.outfile)
os.unlink(self.infile)
except:
pass
