def main(self):
userid = self.kpiuser.getID()
data = xtea.xtea_encrypt(self.kpiuser.getRootKey(),
struct.pack('!2L',0, userid))
print "encrypting user id with user key", self.kpiuser.getID(), self.kpiuser.getRootKey()
self.send(data, "outbox")
yield 1
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
temp = xtea.xtea_decrypt(self.kpiuser.getUserKey(), data)
padding, challenge = struct.unpack('!2L',temp)
response = challenge+1
print "received challenge",challenge
print "sending response", response
data = xtea.xtea_encrypt(self.kpiuser.getUserKey(),
struct.pack('!2L',0, response))
self.send(data, "outbox")
yield 1
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
if data == "SUCCESS":
print "authentication success"
else:
print "authenication failure"
return
#decode data
while 1:
while self.dataReady("inbox"):
data = self.recv("inbox")
print "decoder", data
if data.startswith("KEY"):
index = len("KEY")
#get the ID
padding,ID = struct.unpack("!2L", data[index:index+8])
print "****ID****", ID
key = ""
try:
key = self.kpiuser.getKey(ID)
except KeyError:
pass #the key is not for me
if key != "":
enckey = data[index+8:len(data)]
part1 = xtea.xtea_decrypt(key, enckey[:8])
part2 = xtea.xtea_decrypt(key, enckey[8:16])
sessionkey = part1 + part2
print "decoded key", sessionkey
self.send(sessionkey, "notifykey")
else:
data = data[len("DAT"):len(data)]
print "decoded data", data
self.send(data, "encout")
yield 1
def main(self):
userid = self.kpiuser.getID()
data = xtea.xtea_encrypt(self.kpiuser.getRootKey(),
struct.pack('!2L', 0, userid))
print "encrypting user id with user key", self.kpiuser.getID(
), self.kpiuser.getRootKey()
self.send(data, "outbox")
yield 1
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
temp = xtea.xtea_decrypt(self.kpiuser.getUserKey(), data)
padding, challenge = struct.unpack('!2L', temp)
response = challenge + 1
print "received challenge", challenge
print "sending response", response
data = xtea.xtea_encrypt(self.kpiuser.getUserKey(),
struct.pack('!2L', 0, response))
self.send(data, "outbox")
yield 1
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
if data == "SUCCESS":
print "authentication success"
else:
print "authenication failure"
return
#decode data
while 1:
while self.dataReady("inbox"):
data = self.recv("inbox")
print "decoder", data
if data.startswith("KEY"):
index = len("KEY")
#get the ID
padding, ID = struct.unpack("!2L", data[index:index + 8])
print "****ID****", ID
key = ""
try:
key = self.kpiuser.getKey(ID)
except KeyError:
pass #the key is not for me
if key != "":
enckey = data[index + 8:len(data)]
part1 = xtea.xtea_decrypt(key, enckey[:8])
part2 = xtea.xtea_decrypt(key, enckey[8:16])
sessionkey = part1 + part2
print "decoded key", sessionkey
self.send(sessionkey, "notifykey")
else:
data = data[len("DAT"):len(data)]
print "decoded data", data
self.send(data, "encout")
yield 1
def main(self):
blocksize = 8
MAGIC_STRING = blocksize * chr(0x80)
while 1:
yield 1
if self.dataReady("control"):
data = self.recv("control")
if data == "SHUTDOWN":
self.send(data, "signal")
print "decryptor shutdown"
break
if self.dataReady("keyevent"):
self.key = self.recv("keyevent")
#print "key recieved at the decryptor",self.key
if self.dataReady("inbox") and self.key != "\0":
data = self.recv("inbox")
dec = ''
pad = True
datalen = len(data)
#Unpad last byte with 0x80 followed by zero (null) bytes
if datalen > blocksize:
k = 0
if datalen > 2 * blocksize:
for i in range(0, datalen - 2 * blocksize, blocksize):
block = data[i:i + blocksize]
dec = dec + xtea.xtea_decrypt(self.key, block)
k = i + blocksize
block1 = xtea.xtea_decrypt(self.key, data[k:k + blocksize])
block2 = xtea.xtea_decrypt(self.key,
data[k + blocksize:datalen])
dec = dec + block1
if block2 == MAGIC_STRING:
pad = False
else:
block = block2
else:
block = xtea.xtea_decrypt(self.key, data)
if pad == True:
rindex = block.rfind(chr(0x80))
if rindex != -1:
tmp = block[rindex:len(block)]
pad = chr(0x80) + (len(block) - rindex - 1) * chr(0x00)
if (pad == tmp):
print "remove padding", pad, "padlen", len(pad)
block = block[:rindex]
dec = dec + block
#print "decrypted data ",dec
self.send(dec, "outbox")
def main(self):
blocksize = 8
MAGIC_STRING = blocksize * chr(0x80)
while 1:
yield 1
if self.dataReady("control"):
data = self.recv("control")
if data == "SHUTDOWN":
self.send(data, "signal")
print "decryptor shutdown"
break
if self.dataReady("keyevent"):
self.key = self.recv("keyevent")
#print "key recieved at the decryptor",self.key
if self.dataReady("inbox") and self.key != "\0":
data = self.recv("inbox")
dec = ''
pad = True
datalen = len(data)
#Unpad last byte with 0x80 followed by zero (null) bytes
if datalen > blocksize:
k = 0
if datalen > 2*blocksize:
for i in range(0, datalen - 2*blocksize, blocksize):
block = data[i:i+blocksize]
dec = dec + xtea.xtea_decrypt(self.key,block)
k = i + blocksize
block1 = xtea.xtea_decrypt(self.key,data[k:k+blocksize])
block2 = xtea.xtea_decrypt(self.key,data[k+blocksize:datalen])
dec = dec + block1
if block2 == MAGIC_STRING:
pad = False
else:
block = block2
else:
block = xtea.xtea_decrypt(self.key,data)
if pad == True:
rindex = block.rfind(chr(0x80))
if rindex != -1:
tmp = block[rindex:len(block)]
pad = chr(0x80) + (len(block)-rindex-1)*chr(0x00)
if(pad == tmp):
print "remove padding", pad, "padlen", len(pad)
block = block[:rindex]
dec = dec + block
#print "decrypted data ",dec
self.send(dec, "outbox")
def main(self):
kpidb = self.kpidb
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
padding,userid = struct.unpack('!2L',
xtea.xtea_decrypt(kpidb.getRootKey(),data))
print "Authenticator received userid:", userid
if kpidb.isValidUser(userid) == False:
print "Invalid UserID" # todo shutdown
return
challenge = random.getrandbits(32)
temp = struct.pack('!2L',0, challenge)
userkey = kpidb.getKPIKeys().getKey(userid)
data = xtea.xtea_encrypt(userkey, temp)
print data, challenge, userkey
self.send(data, "outbox")
yield 1
while not self.dataReady("inbox"):
yield 1
data = self.recv("inbox")
temp = xtea.xtea_decrypt(userkey,data)
padding, response = struct.unpack('!2L', temp)
print data, response
if response == challenge + 1:
self.send("SUCCESS", "outbox")
yield 1
else:
print "authenication failure"
return # shutdown
#new user added
self.send(userid, "notifyuser")
#subscribe to data Management back plane
subscriber = subscribeTo("DataManagement")
self.link( (subscriber, "outbox"), (self, "outbox"), passthrough=2)
subscriber.activate()
yield 1
while 1:
yield 1
