def onConnectionRequest(self, pdu):
# X224 Request
self.log.debug("Connection Request received")
# We need to save the original negotiation PDU because Windows will cut the connection if it
# sees that the requested protocols have changed.
parser = NegotiationRequestParser()
self.originalNegotiationPDU = parser.parse(pdu.payload)
if self.originalNegotiationPDU.cookie:
self.log.info(
"%(cookie)s",
{"cookie": self.originalNegotiationPDU.cookie.decode()})
else:
self.log.info("No cookie for this connection %(cookie)s",
{"cookie": ""})
# Only SSL is implemented, so remove other protocol flags
chosenProtocols = self.originalNegotiationPDU.requestedProtocols & NegotiationProtocols.SSL \
if self.originalNegotiationPDU.requestedProtocols is not None else None
self.targetNegotiationPDU = NegotiationRequestPDU(
self.originalNegotiationPDU.cookie,
self.originalNegotiationPDU.flags,
chosenProtocols,
self.originalNegotiationPDU.correlationFlags,
self.originalNegotiationPDU.correlationID,
)
self.connectClient()
def onConnectionRequest(self, pdu: X224ConnectionRequestPDU):
"""
Log the connection cookie and handle connection protocols.
:param pdu: the connection request
"""
parser = NegotiationRequestParser()
self.originalRequest = parser.parse(pdu.payload)
self.state.requestedProtocols = self.originalRequest.requestedProtocols
if self.originalRequest.cookie:
self.log.info("%(cookie)s",
{"cookie": self.originalRequest.cookie.decode()})
else:
self.log.info("No cookie for this connection")
chosenProtocols = self.originalRequest.requestedProtocols
if chosenProtocols is not None:
# Only SSL is implemented, so remove other protocol flags
chosenProtocols &= NegotiationProtocols.SSL
modifiedRequest = NegotiationRequestPDU(
self.originalRequest.cookie,
self.originalRequest.flags,
chosenProtocols,
self.originalRequest.correlationFlags,
self.originalRequest.correlationID,
)
payload = parser.write(modifiedRequest)
defer(self.connectToServer(payload))
def onConnectionRequest(self, pdu: X224ConnectionRequestPDU):
"""
Log the connection cookie and handle connection protocols.
:param pdu: the connection request
"""
parser = NegotiationRequestParser()
self.originalRequest = parser.parse(pdu.payload)
self.state.requestedProtocols = self.originalRequest.requestedProtocols
if self.originalRequest.flags & NegotiationRequestFlags.RESTRICTED_ADMIN_MODE_REQUIRED:
self.log.warning("Client has enabled Restricted Admin Mode, which forces Network-Level Authentication (NLA)."
" Connection will fail.", {"restrictedAdminActivated": True})
if self.originalRequest.cookie:
self.log.info("%(cookie)s", {"cookie": self.originalRequest.cookie.decode()})
else:
self.log.info("No cookie for this connection")
chosenProtocols = self.originalRequest.requestedProtocols
if chosenProtocols is not None:
# Tell the server we only support the allowed authentication methods.
chosenProtocols &= self.state.config.authMethods
modifiedRequest = NegotiationRequestPDU(
self.originalRequest.cookie,
self.originalRequest.flags,
chosenProtocols,
self.originalRequest.correlationFlags,
self.originalRequest.correlationID,
)
payload = parser.write(modifiedRequest)
defer(self.connectToServer(payload))
def startConnection(self):
"""
Start the connection sequence to the target machine.
"""
self.log.debug("TCP connected")
negotiation = self.server.getNegotiationPDU()
parser = NegotiationRequestParser()
self.x224.sendConnectionRequest(parser.write(negotiation))