class RipClientProtocol(StackingProtocolMixin, Protocol):
STATE_CLIENT_CLOSE = "RIP CLIENT STATE MACHINE: CLOSE"
STATE_CLIENT_SNN_SENT = "RIP CLIENT STATE MACHINE: SNN SENT"
STATE_CLIENT_ESTABLISHED = "RIP CLIENT STATE MACHINE: ESTABLISHED"
SIGNAL_CLIENT_SEND_SNN = "RIP CLIENT STATE MACHINE: send snn"
SIGNAL_CLIENT_RCVD_SNNACK = "RIP CLIENT STATE MACHINE: rcvd snn/ack"
SIGNAL_CLIENT_RIPMESSAGE = "RIP CLIENT STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.nonce = randint(0, 10000)
self.SM = StateMachine("Rip Client Protocol StateMachine")
self.SM.addState(self.STATE_CLIENT_CLOSE,
# transition
(self.SIGNAL_CLIENT_SEND_SNN, self.STATE_CLIENT_SNN_SENT),
# no callback for CLOSE
)
self.SM.addState(self.STATE_CLIENT_SNN_SENT,
# transition
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
# callbacks for SNN_SENT
onEnter = self.snnSend)
self.SM.addState(self.STATE_CLIENT_ESTABLISHED,
# transtion
(self.SIGNAL_CLIENT_RIPMESSAGE, self.STATE_CLIENT_ESTABLISHED),
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
# callback
onEnter = self.messageHandle)
def connectionMade(self):
print "Rip Client Protocol: connection Made"
self.SM.start(self.STATE_CLIENT_CLOSE)
print "Rip Client Protocol: start state machine from state -- " + self.SM.currentState()
self.SM.signal(self.SIGNAL_CLIENT_SEND_SNN, "")
print "Rip Client Protocol: after snn send current state -- " + self.SM.currentState()
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_CLIENT_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Client Protocol: data send -- SNN = " + str(ripMsg.SNN) + " Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def msgToSignal(self, msg):
if (msg.SNN == True and msg.ACK == True):
signal = self.SIGNAL_CLIENT_RCVD_SNNACK
elif(msg.SNN == False and msg.ACK == False):
signal = self.SIGNAL_CLIENT_RIPMESSAGE
return signal
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
clientSignal = self.msgToSignal(rcvMsg)
self.SM.signal(clientSignal, rcvMsg)
# onEnter callback for STATE_CLIENT_SNN_SENT
def snnSend(self, signal, msg):
print "Rip Client Protocol: snnSend received signal -- " + signal
snnMsg = RipMessage()
snnMsg.SNN = True
snnMsg.Certificate = self.generateCertificate()
snnMsg.Signature = self.generateSignature(snnMsg.__serialize__())
self.transport.write(Packet.MsgToPacketBytes(snnMsg))
# not a callback, this function will be called at the first time enter established
def sendAck(self, nonce2):
print "Rip Client Protocol: sendAck, current state -- " + self.SM.currentState()
ackMessage = RipMessage()
ackMessage.ACK = True
# ack message certificate chain only have 1 item : [nonce2 + 1]
ackMessage.Certificate = [int(nonce2) + 1]
self.transport.write(Packet.MsgToPacketBytes(ackMessage))
# onEnter callback for STATE_CLIENT_ESTABLISHED
def messageHandle(self, signal, msg):
# first time client enter established, must be triggered by signal_receive_snnack
if signal == self.SIGNAL_CLIENT_RCVD_SNNACK:
print "Rip Client Protocol: message handle -- signal : " + signal
# certificate chain from server [nonce2, addrCert, CACert, nonce1 + 1]
if self.verification(msg) == False:
print "Rip Client Protocol: verification failed!"
return
nonce2 = msg.Certificate[0]
nonce1Plus1 = msg.Certificate[3]
print "Rip Client Protocol: message handle -- rcvd snnack: (nonce1 + 1) from server = " + str(nonce1Plus1) + "nonce2 from server = " + str(nonce2)
self.sendAck(nonce2)
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_CLIENT_RIPMESSAGE:
print "Rip Client Protocol: message handle -- receives rip message: ", msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(msg.Data)
else:
print "Rip Client Protocol: message handle -- undefined signal: ", signal
def generateCertificate(self):
#addr = self.transport.getHost().host
addr = self.transport.getHost()
chain = [self.nonce]
chain += getCertsForAddr(addr)
return chain
def generateSignature(self, data):
#addr = self.transport.getHost().host
addr = self.transport.getHost()
clientPrivateKeyBytes = getPrivateKeyForAddr(addr)
clientPrivateKey = RSA.importKey(clientPrivateKeyBytes)
clientSigner = PKCS1_v1_5.new(clientPrivateKey)
hasher = SHA256.new()
hasher.update(data)
signatureBytes = clientSigner.sign(hasher)
return signatureBytes
def verification(self, snnackMsg):
signatureBytes = snnackMsg.Signature
certificateChain = snnackMsg.Certificate
# verify nonce1 + 1
nonce1Plus1 = certificateChain[3]
if(int(nonce1Plus1) != int(self.nonce + 1)):
return False
# verify server's certificate chain
serverCert = X509Certificate.loadPEM(certificateChain[1])
CACert = X509Certificate.loadPEM(certificateChain[2])
rootCert = X509Certificate.loadPEM(getRootCert())
if(CACert.getIssuer() != rootCert.getSubject()):
return False
if(serverCert.getIssuer() != CACert.getSubject()):
return False
# verify signature with server's public key
serverPublicKeyBlob = serverCert.getPublicKeyBlob()
serverPublicKey = RSA.importKey(serverPublicKeyBlob)
rsaVerifier = PKCS1_v1_5.new(serverPublicKey)
hasher = SHA256.new()
snnackMsg.Signature = ""
bytesToBeVerified = snnackMsg.__serialize__()
hasher.update(bytesToBeVerified)
result = rsaVerifier.verify(hasher, signatureBytes)
print "Rip Client verification result: " + str(result)
return result
class RipClientProtocol(StackingProtocolMixin, Protocol, RipTransport):
"""
Rip Client State Machine
"""
STATE_CLIENT_CLOSE = "RIP CLIENT STATE MACHINE: CLOSE"
STATE_CLIENT_SNN_SENT = "RIP CLIENT STATE MACHINE: SNN SENT"
STATE_CLIENT_CLS_RCVD = "RIP CLIENT STATE MACHINE: CLS RECEIVED"
STATE_CLIENT_CLS_SEND = "RIP CLIENT STATE MACHINE: CLS SENT"
STATE_CLIENT_ESTABLISHED = "RIP CLIENT STATE MACHINE: ESTABLISHED"
SIGNAL_CLIENT_SEND_SNN = "RIP CLIENT STATE MACHINE: send snn"
SIGNAL_CLIENT_RCVD_SNNACK = "RIP CLIENT STATE MACHINE: rcvd snn/ack"
SIGNAL_CLIENT_RIPMESSAGE = "RIP CLIENT STATE MACHINE: general data without flags"
SIGNAL_CLIENT_RCVD_CLS = "RIP CLIENT STATE MACHINE: rcvd cls"
SIGNAL_CLIENT_SEND_CLS = "RIP CLIENT STATE MACHINE: send cls"
SIGNAL_CLIENT_RCVD_CLSACK = "RIP CLIENT STATE MACHINE: rcvd cls/ack from server"
SIGNAL_CLIENT_SEND_CLSACK = "RIP CLIENT STATE MACHINE: send cls/ack back to server"
def __init__(self):
self.packetStorage = PacketStorage()
self.nonce = randint(0, 10000)
self.SM = StateMachine("Rip Client Protocol StateMachine")
self.SM.addState(
self.STATE_CLIENT_CLOSE,
(self.SIGNAL_CLIENT_SEND_SNN, self.STATE_CLIENT_SNN_SENT))
self.SM.addState(
self.STATE_CLIENT_SNN_SENT,
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
onEnter=self.sendSnn)
self.SM.addState(
self.STATE_CLIENT_ESTABLISHED,
(self.SIGNAL_CLIENT_RIPMESSAGE, self.STATE_CLIENT_ESTABLISHED),
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
(self.SIGNAL_CLIENT_RCVD_CLS, self.STATE_CLIENT_CLS_RCVD),
(self.SIGNAL_CLIENT_SEND_CLS, self.STATE_CLIENT_CLS_SEND),
onEnter=self.messageHandle)
self.SM.addState(
self.STATE_CLIENT_CLS_SEND,
(self.SIGNAL_CLIENT_RCVD_CLSACK, self.STATE_CLIENT_CLOSE),
onEnter=self.sendCls)
self.SM.addState(
self.STATE_CLIENT_CLS_RCVD,
(self.SIGNAL_CLIENT_SEND_CLSACK, self.STATE_CLIENT_CLOSE),
onEnter=self.sendClsAck)
def connectionMade(self):
print "Rip Client Protocol: connection Made"
self.SM.start(self.STATE_CLIENT_CLOSE)
print "Rip Client Protocol: start state machine from state -- " + self.SM.currentState(
)
self.SM.signal(self.SIGNAL_CLIENT_SEND_SNN, "")
print "Rip Client Protocol: after snn send current state -- " + self.SM.currentState(
)
def connectionLost(self, reason=connectionDone):
self.SM.signal(self.SIGNAL_CLIENT_SEND_CLS, "")
print "Rip Client Protocol: connection lost"
self.transport.loseConnection()
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_CLIENT_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Client Protocol: data send -- SNN = " + str(
ripMsg.SNN) + " Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def msgToSignal(self, msg): # only used by dataReceived()
snn = msg.SNN
ack = msg.ACK
cls = msg.CLS
if (snn and ack):
signal = self.SIGNAL_CLIENT_RCVD_SNNACK
elif (not snn and not ack):
signal = self.SIGNAL_CLIENT_RIPMESSAGE
elif (cls and not ack):
signal = self.SIGNAL_CLIENT_RCVD_CLS
elif (cls and ack):
signal = self.SIGNAL_CLIENT_RCVD_CLSACK
return signal
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
clientSignal = self.msgToSignal(rcvMsg)
self.SM.signal(clientSignal, rcvMsg)
""" RipClient OnEnter Callback Functions """
# 1. STATE_CLIENT_SNN_SENT
def sendSnn(self, signal, msg):
print "Rip Client Protocol: 1. sendSnn -- " + signal
snnMsg = RipMessage()
snnMsg.SNN = True
snnMsg.Certificate = generateClientCertificate(
self.transport.getHost(), self.nonce)
snnMsg.Signature = generateSignature(self.transport.getHost(),
snnMsg.__serialize__())
self.transport.write(Packet.MsgToPacketBytes(snnMsg))
# 2. STATE_CLIENT_ESTABLISHED
def messageHandle(self, signal, msg):
# first time client enter established, must be triggered by signal_receive_snnack
if signal == self.SIGNAL_CLIENT_RCVD_SNNACK:
print "Rip Client Protocol: 2. message handle -- signal : " + signal
# certificate chain from server [nonce2, addrCert, CACert, nonce1 + 1]
if verification(self.nonce, msg) == False:
print "Rip Client Protocol: verification failed!"
return
nonce2 = msg.Certificate[0]
nonce1Plus1 = msg.Certificate[3]
print "Rip Client Protocol: 2. message handle -- rcvd snnack: (nonce1 + 1) from server = " + str(
nonce1Plus1) + "nonce2 from server = " + str(nonce2)
self.sendAck(nonce2)
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_CLIENT_RIPMESSAGE:
print "Rip Client Protocol: 2. message handle -- receives rip message: ", msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(
msg.Data)
else:
print "Rip Client Protocol: 2. message handle -- undefined signal: ", signal
# 3.1 STATE_CLIENT_CLS_SEND
def sendCls(self, signal, msg):
if signal == self.SIGNAL_CLIENT_SEND_CLS:
print "Rip Client Protocol: 3.1 sendCls -- send CLS"
msg = RipMessage()
msg.CLS = True
self.transport.write(Packet.MsgToPacketBytes(msg))
else:
print "Rip Client Protocol: 3.1 sendCls -- undefined signal: ", signal
# 3.2 STATE_CLIENT_CLS_RCVD
def sendClsAck(self, signal, msg):
if signal == self.SIGNAL_CLIENT_RCVD_CLS:
print "Rip Client Protocol: 3.2 sendClsAck -- send cls/ack back"
# CLS/ACK package
msg = RipMessage()
msg.CLS = True
msg.ACK = True
self.transport.write(Packet.MsgToPacketBytes(msg))
# !! here need to add timer before signal to close
self.SM.signal(self.SIGNAL_CLIENT_SEND_CLSACK, msg)
self.transport.loseConnection()
else:
print "Rip Client Protocol: 3.2 sendClsAck -- undefined signal: ", signal
# not a callback, this function will be called at the first time enter established
def sendAck(self, nonce2):
print "Rip Client Protocol: sendAck, current state -- " + self.SM.currentState(
)
msg = RipMessage()
msg.ACK = True
msg.Certificate = [int(nonce2) + 1]
self.transport.write(Packet.MsgToPacketBytes(msg))
class RipServerProtocol(StackingProtocolMixin, Protocol):
# States for handshake
STATE_SERVER_LISTEN = "RIP SERVER STATE MACHINE: LISTEN"
STATE_SERVER_SNN_RCVD = "RIP SERVER STATE MACHINE: SNN_RCVD"
STATE_SERVER_ESTABLISHED = "RIP SERVER STATE MACHINE: ESTABLISHED"
# signal
SIGNAL_SERVER_RCVD_SNN = "RIP SERVER STATE MACHINE: received snn"
SIGNAL_SERVER_RCVD_ACK = "RIP SERVER STATE MACHINE: received ack"
SIGNAL_SERVER_RIPMESSAGE = "RIP SERVER STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.nonce = randint(0, 10000)
self.SM = StateMachine("Rip Server Protocol StateMachine")
self.SM.addState(self.STATE_SERVER_LISTEN,
# transition
(self.SIGNAL_SERVER_RCVD_SNN, self.STATE_SERVER_SNN_RCVD),
# no callback for LISTEN
)
self.SM.addState(self.STATE_SERVER_SNN_RCVD,
# transition
(self.SIGNAL_SERVER_RCVD_ACK, self.STATE_SERVER_ESTABLISHED),
# callback
onEnter = self.sendSnnAck)
self.SM.addState(self.STATE_SERVER_ESTABLISHED,
# transtion
(self.SIGNAL_SERVER_RIPMESSAGE, self.STATE_SERVER_ESTABLISHED),
# callback
onEnter = self.messageHandle)
def msgToSignal(self, msg):
if(msg.SNN == True and msg.ACK == False):
signal = self.SIGNAL_SERVER_RCVD_SNN
elif(msg.SNN == False and msg.ACK == True):
signal = self.SIGNAL_SERVER_RCVD_ACK
elif(msg.SNN == False and msg.ACK == False):
signal = self.SIGNAL_SERVER_RIPMESSAGE
return signal
def connectionMade(self):
#print "Gate address: " + str(self.transport.getHost())
self.SM.start(self.STATE_SERVER_LISTEN)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_SERVER_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Server Protocol: data send -- Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
serverSignal = self.msgToSignal(rcvMsg)
self.SM.signal(serverSignal, rcvMsg)
# onEnter callback for STATE_SERVER_SNN_RCVD
def sendSnnAck(self, signal, rcvMsg):
if signal == self.SIGNAL_SERVER_RCVD_SNN:
if self.verifySnnMessage(rcvMsg) == False:
print "Rip Server Protocol: verification failed!"
return
print "Rip Server Protocol: sendSnnAck -- nonce1 from client = " + str(rcvMsg.Certificate[0])
nonce1 = rcvMsg.Certificate[0]
snnackMsg = RipMessage()
snnackMsg.SNN = True
snnackMsg.ACK = True
snnackMsg.Certificate = self.generateCertificate(nonce1)
snnackMsg.Signature = self.generateSignature(snnackMsg.__serialize__())
self.transport.write(Packet.MsgToPacketBytes(snnackMsg))
else:
print "Rip Server Protocol: sendSnnAck -- undefined signal: " + signal
# onEnter callback for STATE_SERVER_ESTABLISHED
def messageHandle(self, signal, msg):
# server first enter established, must be triggered by signal-received-ack
if signal == self.SIGNAL_SERVER_RCVD_ACK:
print "Rip Server Protocol: message handle -- received ack: nonce2 + 1 = " + str(msg.Certificate[0]) + " server nonce = " + str(self.nonce)
nonce2Plus1 = msg.Certificate[0]
if (int(nonce2Plus1) != (self.nonce + 1)):
return False
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_SERVER_RIPMESSAGE:
print "Rip Server Protocol: message handle -- receives rip message: data -- " + msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(msg.Data)
else:
print "Rip Server Protocol: message handle -- undefined signal: ", signal
def verifySnnMessage(self, snnMsg):
signatureBytes = snnMsg.Signature
certificate = snnMsg.Certificate
# verify client's certificate chain
clientCert = X509Certificate.loadPEM(certificate[1])
CACert = X509Certificate.loadPEM(certificate[2])
rootCert = X509Certificate.loadPEM(getRootCert())
if(CACert.getIssuer() != rootCert.getSubject()):
return False
if(clientCert.getIssuer() != CACert.getSubject()):
return False
# verify signature with client public key
clientPublicKeyBlob = clientCert.getPublicKeyBlob()
clientPublicKey = RSA.importKey(clientPublicKeyBlob)
rsaVerifier = PKCS1_v1_5.new(clientPublicKey)
hasher = SHA256.new()
snnMsg.Signature = ""
bytesToBeVerified = snnMsg.__serialize__()
hasher.update(bytesToBeVerified)
result = rsaVerifier.verify(hasher, signatureBytes)
print "Server verification result: " + str(result)
return result
def generateCertificate(self, nonce1):
# generate certificate chain for SnnAck message: [nonce2, addrCert, CACert, nonce1 + 1]
#addr = self.transport.getHost().host
addr = self.transport.getHost()
chain = [str(self.nonce)]
chain += getCertsForAddr(addr)
chain += [str(int(nonce1) + 1)]
print "Rip Server Protocol: generateCertificate -- server nonce = "+ chain[0] + " nonce1 + 1 = " + chain[3]
return chain
def generateSignature(self, data):
#addr = self.transport.getHost().host
addr = self.transport.getHost()
serverPrivateKeyBytes = getPrivateKeyForAddr(addr)
serverPrivateKey = RSA.importKey(serverPrivateKeyBytes)
serverSigner = PKCS1_v1_5.new(serverPrivateKey)
hasher = SHA256.new()
hasher.update(data)
signatureBytes = serverSigner.sign(hasher)
return signatureBytes
class RipClientProtocol(StackingProtocolMixin, Protocol):
STATE_CLIENT_CLOSE = "RIP CLIENT STATE MACHINE: CLOSE"
STATE_CLIENT_SNN_SENT = "RIP CLIENT STATE MACHINE: SNN SENT"
STATE_CLIENT_ESTABLISHED = "RIP CLIENT STATE MACHINE: ESTABLISHED"
SIGNAL_CLIENT_SEND_SNN = "RIP CLIENT STATE MACHINE: send snn"
SIGNAL_CLIENT_RCVD_SNNACK = "RIP CLIENT STATE MACHINE: rcvd snn/ack"
SIGNAL_CLIENT_RIPMESSAGE = "RIP CLIENT STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.SM = StateMachine("Rip Client Protocol StateMachine")
self.SM.addState(
self.STATE_CLIENT_CLOSE,
# transition
(self.SIGNAL_CLIENT_SEND_SNN, self.STATE_CLIENT_SNN_SENT),
# no callback for CLOSE
)
self.SM.addState(
self.STATE_CLIENT_SNN_SENT,
# transition
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
# callbacks for SNN_SENT
onEnter=self.snnSend)
self.SM.addState(
self.STATE_CLIENT_ESTABLISHED,
# transtion
(self.SIGNAL_CLIENT_RIPMESSAGE, self.STATE_CLIENT_ESTABLISHED),
(self.SIGNAL_CLIENT_RCVD_SNNACK, self.STATE_CLIENT_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def connectionMade(self):
print "Rip Client Protocol: connection Made"
self.SM.start(self.STATE_CLIENT_CLOSE)
print "Rip Client Protocol: start state machine from state -- " + self.SM.currentState(
)
self.SM.signal(self.SIGNAL_CLIENT_SEND_SNN, "")
print "Rip Client Protocol: after snn send current state -- " + self.SM.currentState(
)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_CLIENT_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Client Protocol: data send -- SNN = " + str(
ripMsg.SNN) + " Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def msgToSignal(self, msg):
if (msg.SNN == True and msg.ACK == True):
signal = self.SIGNAL_CLIENT_RCVD_SNNACK
elif (msg.SNN == False and msg.ACK == False):
signal = self.SIGNAL_CLIENT_RIPMESSAGE
return signal
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
clientSignal = self.msgToSignal(rcvMsg)
self.SM.signal(clientSignal, rcvMsg)
# onEnter callback for STATE_CLIENT_SNN_SENT
def snnSend(self, signal, msg):
print "Rip Client Protocol: snnSend received signal -- " + signal
snnMessage = RipMessage()
snnMessage.SNN = True
self.transport.write(Packet.MsgToPacketBytes(snnMessage))
# not a callback, this function will be called at the first time enter established
def sendAck(self):
print "Rip Client Protocol: sendAck, current state -- " + self.SM.currentState(
)
ackMessage = RipMessage()
ackMessage.ACK = True
self.transport.write(Packet.MsgToPacketBytes(ackMessage))
# onEnter callback for STATE_CLIENT_ESTABLISHED
def messageHandle(self, signal, msg):
# first time client 4enter established, must be triggered by signal_receive_snnack
if signal == self.SIGNAL_CLIENT_RCVD_SNNACK:
print "Rip Client Protocol: message handle -- signal : " + signal
self.sendAck()
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_CLIENT_RIPMESSAGE:
print "Rip Client Protocol: message handle -- receives rip message: ", msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(
msg.Data)
else:
print "Rip Client Protocol: message handle -- undefined signal: ", signal
class RipProtocol(StackingProtocolMixin, Protocol):
def __init__(self):
self.buffer = ""
self.storage = MessageStorage()
self.TCB = TransmissionControlBlock()
self.higherTransport = RipTransport(self.transport, self, self.TCB)
self.fsm = FSM("RipStateMachine")
self.fsm.addState("Closed", ("Send_SNN", "SNN-SENT"))
self.fsm.addState("Listening", ("SNN_Received", "ACK-Sent"))
self.fsm.addState("SNN-SENT", ("SNN_ACK_Received", "Established"),
onEnter=self.sendSyn)
self.fsm.addState("ACK-Sent", ("ACK_Received", "Established"),
onEnter=self.sendSynAck)
self.fsm.addState("Established", ("CLOSE_Requested", "CLOSE-REQ"),
("CLOSE_Received", "CLOSE-RECV"),
onEnter=self.sendAck)
self.fsm.addState("CLOSE-REQ", ("CLOSE_ACK_Received", "Closed"))
self.fsm.addState("CLOSE-RECV", ("CLOSE_ACK_Sent", "Listening"),
onEnter=self.sendFinAck)
def connectionMade(self):
self.higherTransport = RipTransport(self.transport, self, self.TCB)
if self.factory.State == "CLIENT": self.fsm.start("Closed")
elif self.factory.State == "SERVER": self.fsm.start("Listening")
if (self.factory.State == "CLIENT"
and self.fsm.currentState() == "Closed"):
self.fsm.signal("Send_SNN", '')
def dataReceived(self, data):
self.buffer += data
self.storage.update(data)
for msg in self.storage.iterateMessages():
try:
message = msg
except Exception, e:
print "Error", e
return
# If SNN is received
if (message.sequence_number_notification_flag
and self.fsm.currentState() == "Listening"):
print "%s SNN Received with Sequence No %s" % (
self.factory.State, message.sequence_number)
self.fsm.signal("SNN_Received", message)
# If SNN-ACK in received
elif (message.sequence_number_notification_flag
and message.acknowledgement_flag and
message.acknowledgement_number == self.TCB.sequence_number
and self.fsm.currentState() == "SNN-SENT"):
print "%s: SNN-ACK Received with Sequence No %s" % (
self.factory.State, message.sequence_number)
self.fsm.signal("SNN_ACK_Received", message)
self.makeHigherConnection(self.higherTransport)
# If final ACK is received
elif (not message.sequence_number_notification_flag
and message.acknowledgement_flag and
message.acknowledgement_number == self.TCB.sequence_number
and self.fsm.currentState() == "ACK-Sent"):
if self.checkMessageIntegrity(message):
peerCert = message.certificate
signedNonce = peerCert[0]
cert = self.TCB.peerCert
caCert = self.TCB.peerCaCert
if (self.verifySignedNonce(cert, caCert, signedNonce)):
self.fsm.signal("ACK_Received", message)
print "%s: ACK Received with Sequence No %s" % (
self.factory.State, message.sequence_number)
self.TCB.next_seq_expected = message.sequence_number + 1
self.makeHigherConnection(self.higherTransport)
# If a message is received by one of the users
elif (message.data != ""
and self.fsm.currentState() == "Established"
and message.sessionID
== str(self.TCB.peer_nonce) + str(self.TCB.nonce)
and not message.acknowledgement_flag
and not message.close_flag
and message.sequence_number == self.TCB.next_seq_expected):
if self.checkMessageIntegrity(message):
self.TCB.next_seq_expected = message.sequence_number + len(
str(message.data))
# Add the message to the list of received messages
self.TCB.receivedMessages[
message.sequence_number] = message
self.sendMessageAck(message.data)
# If ACK for the packet is received
elif (self.fsm.currentState() == "Established"
and message.sessionID
== str(self.TCB.peer_nonce) + str(self.TCB.nonce)
and message.acknowledgement_flag and not message.close_flag):
# Remove the acknowledged message from the retransmission buffer
for key, message in list(
self.TCB.retransmissionBuffer.items()):
if key <= message.acknowledgement_number:
del self.TCB.retransmissionBuffer[key]
# If CLOSING ACK is received
elif (message.close_flag and message.acknowledgement_number
and self.fsm.currentState() == "CLOSE-REQ"):
print "%s: CLOSE ACK Received with Sequence Number %s" % (
self.factory.State, message.sequence_number)
if self.TCB.retransmissionBuffer:
self.retransmitPackets()
self.fsm.signal("CLOSE_ACK_Received", message)
self.closeConnection()
elif (message.sequence_number_notification_flag
and self.fsm.currentState() == "Established"):
self.closeConnection()
class ChaperoneProtocol(Protocol):
STATE_DISCONNECTED = "Chaperone Protocol: disconnected"
STATE_NEGOTIATING = "Chaperone Protocol: negotiating"
STATE_CONNECTED = "Chaperone Protocol: connected"
STATE_CLOSED = "Chaperone Protocol: closed"
SIGNAL_REG_SENT = "Chaperone Protocol: registration sent to chaperone"
SIGNAL_REG_RECEIVED = "Chaperone Protocol: chaperone sent registration"
SIGNAL_REG_FAILED = "Chaperone Protocol: chaperone denied registration"
SIGNAL_UNREG_SENT = "Chaperone Protocol: unregistration sent to chaperone"
MAX_MSG_SIZE = (2**16) # This is about the size of a TCP packet
FRAMING_SIZE = (2**12)
MAX_FRAG_AGE = 10 * 60 # Ten minute time-out on G2gMessage Frags
def __init__(self, gateAddress, demuxer):
self.__packetStorage = PacketStorage()
self.__gateAddress = gateAddress
self.__demuxer = demuxer
self.__fsm = FSM("Chaperone Protocol FSM")
self.__fsm.addState(
self.STATE_DISCONNECTED,
# transitions
(self.SIGNAL_REG_SENT, self.STATE_NEGOTIATING))
self.__fsm.addState(
self.STATE_NEGOTIATING,
# transitions
(GateRegistered, self.STATE_NEGOTIATING),
(self.SIGNAL_REG_RECEIVED, self.STATE_CONNECTED),
(self.SIGNAL_REG_FAILED, self.STATE_CLOSED),
# callbacks
onEnter=self.__checkNegotiation)
self.__fsm.addState(
self.STATE_CONNECTED,
# transitions
(self.SIGNAL_UNREG_SENT, self.STATE_DISCONNECTED),
(Gate2GateMessage, self.STATE_CONNECTED),
# callbacks
onEnter=self.__handleConnectedMessages)
self.__fsm.start(self.STATE_DISCONNECTED)
def gateAddress(self):
return self.__gateAddress
def connectionLost(self, reason=connectionDone):
self.__demuxer.close()
def connectionMade(self):
registerGateMessage = RegisterGate()
registerGateMessage.address = self.__gateAddress
self.transport.write(Packet.MsgToPacketBytes(registerGateMessage))
self.__fsm.signal(self.SIGNAL_REG_SENT, registerGateMessage)
def dataReceived(self, data):
self.__packetStorage.update(data)
for msg in IterateMessages(self.__packetStorage, logger, errReporter):
try:
self.__fsm.signal(msg.__class__, msg)
except StateMachineError, e:
errReporter.error(
("State machine error after receiving %s. Error:\n%s") %
(msg, e))
self.transport.loseConnection()
class RipServerProtocol(StackingProtocolMixin, Protocol):
# States for handshake
STATE_SERVER_LISTEN = "RIP SERVER STATE MACHINE: LISTEN"
STATE_SERVER_SNN_RCVD = "RIP SERVER STATE MACHINE: SNN_RCVD"
STATE_SERVER_ESTABLISHED = "RIP SERVER STATE MACHINE: ESTABLISHED"
# signal
SIGNAL_SERVER_RCVD_SNN = "RIP SERVER STATE MACHINE: received snn"
SIGNAL_SERVER_RCVD_ACK = "RIP SERVER STATE MACHINE: received ack"
SIGNAL_SERVER_RIPMESSAGE = "RIP SERVER STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.SM = StateMachine("Rip Server Protocol StateMachine")
self.SM.addState(
self.STATE_SERVER_LISTEN,
# transition
(self.SIGNAL_SERVER_RCVD_SNN, self.STATE_SERVER_SNN_RCVD),
# no callback for LISTEN
)
self.SM.addState(
self.STATE_SERVER_SNN_RCVD,
# transition
(self.SIGNAL_SERVER_RCVD_ACK, self.STATE_SERVER_ESTABLISHED),
# callback
onEnter=self.sendSnnAck)
self.SM.addState(
self.STATE_SERVER_ESTABLISHED,
# transtion
(self.SIGNAL_SERVER_RIPMESSAGE, self.STATE_SERVER_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def msgToSignal(self, msg):
if (msg.SNN == True and msg.ACK == False):
signal = self.SIGNAL_SERVER_RCVD_SNN
elif (msg.SNN == False and msg.ACK == True):
signal = self.SIGNAL_SERVER_RCVD_ACK
elif (msg.SNN == False and msg.ACK == False):
signal = self.SIGNAL_SERVER_RIPMESSAGE
return signal
def connectionMade(self):
self.SM.start(self.STATE_SERVER_LISTEN)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_SERVER_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Server Protocol: data send -- Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
serverSignal = self.msgToSignal(rcvMsg)
self.SM.signal(serverSignal, rcvMsg)
# onEnter callback for STATE_SERVER_SNN_RCVD
def sendSnnAck(self, signal, data):
if signal == self.SIGNAL_SERVER_RCVD_SNN:
print "Rip Server Protocol: sendSnnAck"
snnackMessage = RipMessage()
snnackMessage.SNN = True
snnackMessage.ACK = True
self.transport.write(Packet.MsgToPacketBytes(snnackMessage))
else:
print "Rip Server Protocol: sendSnnAck -- undefined signal: " + signal
# onEnter callback for STATE_SERVER_ESTABLISHED
def messageHandle(self, signal, msg):
# server first enter established, must be triggered by signal-received-ack
if signal == self.SIGNAL_SERVER_RCVD_ACK:
print "Rip Server Protocol: message handle -- received ack"
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_SERVER_RIPMESSAGE:
print "Rip Server Protocol: message handle -- receives rip message: data -- " + msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(
msg.Data)
else:
print "Rip Server Protocol: message handle -- undefined signal: ", signal
class RipServerProtocol(StackingProtocolMixin, Protocol):
"""
Rip Server State Machine
"""
STATE_SERVER_LISTEN = "RIP SERVER STATE MACHINE: LISTEN"
STATE_SERVER_SNN_RCVD = "RIP SERVER STATE MACHINE: SNN_RCVD"
STATE_SERVER_ESTABLISHED = "RIP SERVER STATE MACHINE: ESTABLISHED"
STATE_SERVER_CLS_RCVD = "RIP SERVER STATE MACHINE: CLS_RCVD"
STATE_SERVER_CLS_SEND = "RIP SERVER STATE MACHINE: CLS_SEND"
SIGNAL_SERVER_RCVD_SNN = "RIP SERVER STATE MACHINE: received snn"
SIGNAL_SERVER_RCVD_ACK = "RIP SERVER STATE MACHINE: received ack"
SIGNAL_SERVER_RIPMESSAGE = "RIP SERVER STATE MACHINE: general data without flags"
SIGNAL_SERVER_RCVD_CLS = "RIP SERVER STATE MACHINE: rcvd cls"
SIGNAL_SERVER_SEND_CLS = "RIP SERVER STATE MACHINE: send cls"
SIGNAL_SERVER_RCVD_CLSACK = "RIP SERVER STATE MACHINE: rcvd cls/ack from client"
SIGNAL_SERVER_SEND_CLSACK = "RIP SERVER STATE MACHINE: send cls/ack back to client"
def __init__(self):
self.packetStorage = PacketStorage()
self.nonce = randint(0, 10000)
self.SM = StateMachine("Rip Server Protocol StateMachine")
self.SM.addState(self.STATE_SERVER_LISTEN,
(self.SIGNAL_SERVER_RCVD_SNN, self.STATE_SERVER_SNN_RCVD),
)
self.SM.addState(self.STATE_SERVER_SNN_RCVD,
(self.SIGNAL_SERVER_RCVD_ACK, self.STATE_SERVER_ESTABLISHED),
onEnter = self.sendSnnAck)
self.SM.addState(self.STATE_SERVER_ESTABLISHED,
(self.SIGNAL_SERVER_RIPMESSAGE, self.STATE_SERVER_ESTABLISHED),
(self.SIGNAL_SERVER_RCVD_CLS, self.STATE_SERVER_CLS_RCVD),
(self.SIGNAL_SERVER_SEND_CLS, self.STATE_SERVER_CLS_SEND),
onEnter = self.messageHandle)
self.SM.addState(self.STATE_SERVER_CLS_SEND,
(self.SIGNAL_SERVER_RCVD_CLSACK, self.STATE_SERVER_LISTEN),
onEnter = self.sendCls)
self.SM.addState(self.STATE_SERVER_CLS_RCVD,
(self.SIGNAL_SERVER_SEND_CLSACK, self.STATE_SERVER_LISTEN),
onEnter = self.sendClsAck)
def connectionMade(self):
self.SM.start(self.STATE_SERVER_LISTEN)
def connectionLost(self, reason=connectionDone):
self.SM.signal(self.SIGNAL_SERVER_SEND_CLS, "")
print "Rip Server Protocol: connection lost"
self.transport.loseConnection()
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_SERVER_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Server Protocol: data send -- Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def msgToSignal(self, msg): # only used by dataReceived()
snn = msg.SNN
ack = msg.ACK
cls = msg.CLS
if(snn and not ack):
signal = self.SIGNAL_SERVER_RCVD_SNN
elif(not snn and ack):
signal = self.SIGNAL_SERVER_RCVD_ACK
elif(not snn and not ack):
signal = self.SIGNAL_SERVER_RIPMESSAGE
elif(cls and not ack):
print "server received cls"
signal = self.SIGNAL_SERVER_RCVD_CLS
elif(cls and ack):
signal = self.SIGNAL_SERVER_RCVD_CLSACK
return signal
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
serverSignal = self.msgToSignal(rcvMsg)
print "server signal" + str(serverSignal)
self.SM.signal(serverSignal, rcvMsg)
""" RipServer OnEnter Callback Functions """
# 1. STATE_SERVER_SNN_RCVD
def sendSnnAck(self, signal, rcvMsg):
if signal == self.SIGNAL_SERVER_RCVD_SNN:
if verification(0, rcvMsg) == False:
return
print "Rip Server Protocol: 1. sendSnnAck -- nonce1 from client = " + str(rcvMsg.Certificate[0])
nonce1 = rcvMsg.Certificate[0]
msg = RipMessage()
msg.SNN = True
msg.ACK = True
msg.Certificate = generateServerCertificate(self.transport.getHost(), nonce1, self.nonce)
msg.Signature = generateSignature(self.transport.getHost(), msg.__serialize__())
self.transport.write(Packet.MsgToPacketBytes(msg))
else:
print "Rip Server Protocol: 1. sendSnnAck -- undefined signal: " + signal
# 2. STATE_SERVER_ESTABLISHED
def messageHandle(self, signal, msg):
if signal == self.SIGNAL_SERVER_RCVD_ACK:
print "Rip Server Protocol: 2. message handle -- received ack: nonce2 + 1 = " + str(msg.Certificate[0]) + " server nonce = " + str(self.nonce)
nonce2Plus1 = msg.Certificate[0]
if (int(nonce2Plus1) != (self.nonce + 1)):
return False
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_SERVER_RIPMESSAGE:
print "Rip Server Protocol: 2. message handle -- receives rip message: data -- " + msg.Data
self.higherProtocol() and self.higherProtocol().dataReceived(msg.Data)
else:
print "Rip Server Protocol: 2. message handle -- undefined signal: ", signal
# 3.1 STATE_SERVER_CLS_SEND
def sendCls(self, signal, msg):
if signal == self.SIGNAL_SERVER_SEND_CLS:
print "Rip Server Protocol: 3.1 sendCls -- send CLS"
msg = RipMessage()
msg.CLS = True
self.transport.write(Packet.MsgToPacketBytes(msg))
# timer here
else:
print "Rip Server Protocol: 3.1 sendCls -- undefined signal: ", signal
# 3.2 STATE_CLIENT_CLS_RCVD
def sendClsAck(self,signal, msg):
if signal == self.SIGNAL_SERVER_RCVD_CLS:
print "Rip Server Protocol: 3.2 sendClsAck -- rcvd CLS"
msg = RipMessage()
msg.CLS = True
msg.ACK = True
self.transport.write(Packet.MsgToPacketBytes(msg))
self.SM.signal(self.SIGNAL_SERVER_SEND_CLSACK, msg)
self.transport.loseConnection()
else:
print "Rip Server Protocol: 3.2 sendClsAck -- undefined signal: ", signal
class KissClientProtocol(StackingProtocolMixin, Protocol):
# states for kiss client handshake
STATE_CLIENT_LOWERTRANSPORT_ESTABLISHED = "KISS CLIENT STATE MACHINE: CLIENT LOWERTRANSPORT ESTABLISHED"
STATE_CLIENT_KEY_SENT = "KISS CLIENT STATE MACHINE: CLIENT SEND KEY_C"
STATE_CLIENT_KISS_ESTABLISHED = "KISS CLIENT STATE MACHINE: CLIENT READY TO DATA TRANSMISSION"
# signal for kiss client handshake
SIGNAL_CLIENT_SEND_KEY_C = "KISS CLIENT STATE MACHINE: Client send K_c"
SIGNAL_CLIENT_RCVD_KEY_S = "KISS CLIENT STATE MACHINE: Client received K_s"
# signal for data transmission
SIGNAL_CLIENT_RCVD_KISSDATA = "KISS CLIENT STATE MACHINE: Client received enrypted data (kiss data)"
def __init__(self):
self.writeIV = clientIV
self.readIV = ""
self.writeKey = clientKey
self.readKey = ""
self.IV_asCtr1 = Counter.new(128,
initial_value=int(
self.writeIV.encode('hex'), 16))
#self.IV_asCtr2 = Counter.new(128, initial_value=int(self.readIV.encode('hex'),16))
self.aesEncrypter = AES.new(self.writeKey,
counter=self.IV_asCtr1,
mode=AES.MODE_CTR)
#self.aesDecrypter = AES.new(self.readKey, counter=self.IV_asCtr2, mode=AES.MODE_CTR)
self.packetStorage = PacketStorage()
self.SM = StateMachine("Kiss Client Protocol StateMachine")
self.SM.addState(
self.STATE_CLIENT_LOWERTRANSPORT_ESTABLISHED,
# transition
(self.SIGNAL_CLIENT_SEND_KEY_C, self.STATE_CLIENT_KEY_SENT),
# no callback
)
self.SM.addState(
self.STATE_CLIENT_KEY_SENT,
# transition
(self.SIGNAL_CLIENT_RCVD_KEY_S, self.STATE_CLIENT_KISS_ESTABLISHED
),
# callback
onEnter=self.keySend)
self.SM.addState(
self.STATE_CLIENT_KISS_ESTABLISHED,
# transition
(self.SIGNAL_CLIENT_RCVD_KISSDATA,
self.STATE_CLIENT_KISS_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def msgToSignal(self, msg):
if msg.messageType == "data":
signal = self.SIGNAL_CLIENT_RCVD_KISSDATA
elif msg.messageType == "handshake": # for client it must be the Key_s from server
signal = self.SIGNAL_CLIENT_RCVD_KEY_S
return signal
# initial kiss layer connection
def connectionMade(self):
self.SM.start(self.STATE_CLIENT_LOWERTRANSPORT_ESTABLISHED)
print "Kiss Client Protocol: connectionMade -- start from state: " + self.SM.currentState(
)
self.SM.signal(self.SIGNAL_CLIENT_SEND_KEY_C, "")
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_CLIENT_KISS_ESTABLISHED:
return
kissMsg = KissData()
cipherText = self.aesEncrypter.encrypt(data)
kissMsg.Data = cipherText
self.transport.write(Packet.MsgToPacketBytes(kissMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
kissSignal = self.msgToSignal(rcvMsg)
print "Kiss Client Protocol: dataReceived -- kiss signal == " + kissSignal
self.SM.signal(kissSignal, rcvMsg)
# onEnter callback for STATE_CLIENT_KEY_SENT
def keySend(self, signal, data):
if signal == self.SIGNAL_CLIENT_SEND_KEY_C:
print "Kiss Client Protocol: keySend -- send client key"
msg = KissHandshake()
msg.Key = self.writeKey # Key_c
msg.IV = self.writeIV
print "Kiss Client Protocol: keySend -- send client key: " + msg.Key.encode(
'hex')
print "Kiss Client Protocol: keySend -- send client IV: " + msg.IV.encode(
'hex')
self.transport.write(Packet.MsgToPacketBytes(msg))
else:
print "Kiss Client Protocol: keySend -- undefined signal: " + signal
# onEnter callback for STATE_CLIENT_KISS_ESTABLISHED
def messageHandle(self, signal, kissmsg):
'''
Client received key and IV from server, it will
1) setup own read key
2) makeHigherConnection
'''
if signal == self.SIGNAL_CLIENT_RCVD_KEY_S:
print "Kiss Client Protocol: messageHandle -- received server key: " + kissmsg.Key.encode(
'hex')
print "Kiss Client Protocol: messageHandle -- received server IV: " + kissmsg.IV.encode(
'hex')
self.readKey = kissmsg.Key
self.readIV = kissmsg.IV
higherTransport = KissTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_CLIENT_RCVD_KISSDATA:
print "Kiss Client Protocol: messageHandle -- received encrypted data from server"
print "Kiss Client Protocol: messageHandle -- read IV: " + self.readIV
self.IV_asCtr2 = Counter.new(128,
initial_value=int(
self.readIV.encode('hex'), 16))
self.aesDecrypter = AES.new(self.readKey,
counter=self.IV_asCtr2,
mode=AES.MODE_CTR)
decrypttext = self.aesDecrypter.decrypt(kissmsg.Data)
self.higherProtocol() and self.higherProtocol().dataReceived(
decrypttext)
else:
print "Kiss Client Protocol: messageHandle -- undefined signal: " + signal
class KissServerProtocol(StackingProtocolMixin, Protocol):
# States for handshake
STATE_SERVER_LOWERTRANSPORT_ESTABLISHED = "KISS SERVER STATE MACHINE: LOWER TRANSPORT ESTABLISHED"
STATE_SERVER_KISS_ESTABLISHED = "KISS SERVER STATE MACHINE: SERVER READY TO DATA TRANSMISSION"
# signal for handshake
SIGNAL_SERVER_RCVD_KEY_C = "KISS SERVER STATE MACHINE: Server received client key"
# signal for kiss data transmission
SIGNAL_SERVER_KISSDATA = "KISS SERVER STATE MACHINE: Server received kiss data"
def __init__(self):
self.writeIV = serverIV
self.readIV = ""
self.writeKey = serverKey
self.readKey = ""
self.IV_asCtr1 = Counter.new(128,
initial_value=int(
self.writeIV.encode('hex'), 16))
#self.IV_asCtr2 = Counter.new(128, initial_value=int(self.readIV.encode('hex'),16))
self.aesEncrypter = AES.new(self.writeKey,
counter=self.IV_asCtr1,
mode=AES.MODE_CTR)
#self.aesDecrypter = AES.new(self.readKey, counter=self.IV_asCtr2, mode=AES.MODE_CTR)
self.packetStorage = PacketStorage()
self.SM = StateMachine("Kiss Server Protocol StateMachine")
self.SM.addState(
self.STATE_SERVER_LOWERTRANSPORT_ESTABLISHED,
# transition
(self.SIGNAL_SERVER_RCVD_KEY_C, self.STATE_SERVER_KISS_ESTABLISHED)
# no callback
)
self.SM.addState(
self.STATE_SERVER_KISS_ESTABLISHED,
# transition
(self.SIGNAL_SERVER_KISSDATA, self.STATE_SERVER_KISS_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def msgToSignal(self, msg):
if msg.messageType == "handshake":
signal = self.SIGNAL_SERVER_RCVD_KEY_C
if msg.messageType == "data":
signal = self.SIGNAL_SERVER_KISSDATA
print signal
return signal
def connectionMade(self):
self.SM.start(self.STATE_SERVER_LOWERTRANSPORT_ESTABLISHED)
print "Kiss Client Protocol: connectionMade -- start from state" + self.SM.currentState(
)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_SERVER_KISS_ESTABLISHED:
return
cipherText = self.aesEncrypter.encrypt(data)
kissMsg = KissData()
kissMsg.Data = cipherText
self.transport.write(Packet.MsgToPacketBytes(kissMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
kissSignal = self.msgToSignal(rcvMsg)
print "Kiss Server Protocol: dataReceived -- kiss signal == " + kissSignal
self.SM.signal(kissSignal, rcvMsg)
def messageHandle(self, signal, kissmsg):
'''
server received client key and IV: it will
1) set up own read key, IV
2) send own key back to client
3) makeHigherConnection
'''
if signal == self.SIGNAL_SERVER_RCVD_KEY_C:
print "Kiss Server Protocol: messageHandle -- received key from client: " + kissmsg.Key.encode(
'hex')
self.readKey = kissmsg.Key
print "Kiss Server Protocol: messageHandle -- received key from client: " + kissmsg.Key.encode(
'hex')
self.readIV = kissmsg.IV
print "Kiss Server Protocol: messageHandle -- received IV from client: " + kissmsg.IV.encode(
'hex')
serverKeyMsg = KissHandshake()
serverKeyMsg.Key = self.writeKey
serverKeyMsg.IV = self.writeIV
print "Kiss Server Protocol: messageHandle -- server encrypt key: " + self.writeKey.encode(
'hex')
print "Kiss Server Protocol: messageHandle -- server IV: " + self.writeIV.encode(
'hex')
self.transport.write(Packet.MsgToPacketBytes(serverKeyMsg))
print "Kiss Server Protocol: messageHandle -- server send key to client: " + serverKeyMsg.Key.encode(
'hex')
higherTransport = KissTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_SERVER_KISSDATA:
print "Kiss Server Protocol: messageHandle -- received encrypt data: "
self.IV_asCtr2 = Counter.new(128,
initial_value=int(
self.readIV.encode('hex'), 16))
self.aesDecrypter = AES.new(self.readKey,
counter=self.IV_asCtr2,
mode=AES.MODE_CTR)
decryptText = self.aesDecrypter.decrypt(kissmsg.Data)
print "Kiss Server Protocol: messageHandle -- decrypt data: " + decryptText
self.higherProtocol() and self.higherProtocol().dataReceived(
decryptText)
else:
print "Kiss Client Protocol: messageHandle -- undefined signal: " + signal
class RipClientProtocol(StackingProtocolMixin, Protocol):
STATE_CLIENT_CLOSE = "RIP CLIENT STATE MACHINE: CLOSE"
STATE_CLIENT_ESTABLISHED = "RIP CLIENT STATE MACHINE: ESTABLISHED"
SIGNAL_CLIENT_SEND_SNN = "RIP CLIENT STATE MACHINE: send snn"
SIGNAL_CLIENT_RIPMESSAGE = "RIP CLIENT STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.SM = StateMachine("Rip Client Protocol StateMachine")
self.SM.addState(
self.STATE_CLIENT_CLOSE,
# transition
(self.SIGNAL_CLIENT_SEND_SNN, self.STATE_CLIENT_ESTABLISHED),
# no callback for CLOSE
)
self.SM.addState(
self.STATE_CLIENT_ESTABLISHED,
# transtion
(self.SIGNAL_CLIENT_RIPMESSAGE, self.STATE_CLIENT_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_CLIENT_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Client Protocol: data send -- SNN = " + str(
ripMsg.SNN) + " Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
print "Rip Client Protocol: dataReceived -- rip message received, current state: ", self.SM.currentState(
)
dataToUpper = rcvMsg.Data
self.SM.signal(self.SIGNAL_CLIENT_RIPMESSAGE, dataToUpper)
print "Rip Client Protocol: dataReceived -- after signal_ripmessage, current state: ", self.SM.currentState(
)
def messageHandle(self, signal, dataToUpper):
if signal == self.SIGNAL_CLIENT_SEND_SNN:
print "Rip Client Protocol: message handle -- send snn: ", dataToUpper
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_CLIENT_RIPMESSAGE:
print "Rip Client Protocol: message handle -- receives rip message: ", dataToUpper
self.higherProtocol() and self.higherProtocol().dataReceived(
dataToUpper)
else:
print "Rip Client Protocol: message handle -- undefined signal: ", signal
def connectionMade(self):
print "Rip Client Protocol: connection Made"
self.SM.start(self.STATE_CLIENT_CLOSE)
print "Rip Client Protocol: start state machine from state -- " + self.SM.currentState(
)
self.snnSend()
self.SM.signal(self.SIGNAL_CLIENT_SEND_SNN, "")
print "Rip Client Protocol: after snn send current state -- " + self.SM.currentState(
)
def snnSend(self):
snnMessage = RipMessage()
snnMessage.SNN = True
self.transport.write(Packet.MsgToPacketBytes(snnMessage))
print "Rip Client Protocol: send snn"
class RipServerProtocol(StackingProtocolMixin, Protocol):
# States for handshake
STATE_SERVER_LISTEN = "RIP STATE MACHINE: LISTEN"
STATE_SERVER_ESTABLISHED = "RIP STATE MACHINE: ESTABLISHED"
# signal
SIGNAL_SERVER_RCVD_SNN = "RIP STATE MACHINE: received snn"
SIGNAL_SERVER_RIPMESSAGE = "RIP STATE MACHINE: general data without flags"
def __init__(self):
self.packetStorage = PacketStorage()
self.SM = StateMachine("Rip Server Protocol StateMachine")
self.SM.addState(
self.STATE_SERVER_LISTEN,
# transition
(self.SIGNAL_SERVER_RCVD_SNN, self.STATE_SERVER_ESTABLISHED),
# no callback for LISTEN
)
self.SM.addState(
self.STATE_SERVER_ESTABLISHED,
# transtion
(self.SIGNAL_SERVER_RIPMESSAGE, self.STATE_SERVER_ESTABLISHED),
# callback
onEnter=self.messageHandle)
def connectionMade(self):
self.SM.start(self.STATE_SERVER_LISTEN)
def dataSend(self, data):
if not self.SM.currentState() == self.STATE_SERVER_ESTABLISHED:
return
ripMsg = RipMessage()
ripMsg.Data = data
print "Rip Server Protocol: data send -- SNN = " + str(
ripMsg.SNN) + " Data = " + ripMsg.Data
self.transport.write(Packet.MsgToPacketBytes(ripMsg))
def dataReceived(self, data):
self.packetStorage.update(data)
for rcvMsg in IterateMessages(self.packetStorage, logger, errReporter):
if (rcvMsg.SNN == True):
print "Rip Protocol: dataReceived -- snn received, current state: ", self.SM.currentState(
)
self.SM.signal(self.SIGNAL_SERVER_RCVD_SNN, rcvMsg)
print "Rip Protocol: dataReceived -- after;l signal_rcvd_snn, current state: ", self.SM.currentState(
)
else:
print "Rip Protocol: dataReceived -- rip message received, current state: ", self.SM.currentState(
)
dataToUpper = rcvMsg.Data
self.SM.signal(self.SIGNAL_SERVER_RIPMESSAGE, dataToUpper)
print "Rip Protocol: dataReceived -- after signal_ripmessage, current state: ", self.SM.currentState(
)
def messageHandle(self, signal, dataToUpper):
if signal == self.SIGNAL_SERVER_RCVD_SNN:
print "Rip Server Protocol: message handle -- receives snn: ", dataToUpper
higherTransport = RipTransport(self.transport, self)
self.makeHigherConnection(higherTransport)
elif signal == self.SIGNAL_SERVER_RIPMESSAGE:
print "Rip Protocol: message handle -- receives rip message: ", dataToUpper
self.higherProtocol() and self.higherProtocol().dataReceived(
dataToUpper)
else:
print "Rip Protocol: message handle -- undefined signal: ", signal