def create_session(request): data = simplejson.loads(request.raw_post_data or "{}") if "client_nonce" not in data: return JsonResponse({"error": "Client nonce must be specified."}, status=500) if len(data["client_nonce"]) != 32 or re.match("[^0-9a-fA-F]", data["client_nonce"]): return JsonResponse({"error": "Client nonce is malformed (must be 32-digit hex)."}, status=500) if "client_device" not in data: return JsonResponse({"error": "Client device must be specified."}, status=500) if "server_nonce" not in data: if SyncSession.objects.filter(client_nonce=data["client_nonce"]).count(): return JsonResponse({"error": "Session already exists; include server nonce and signature."}, status=500) session = SyncSession() session.client_nonce = data["client_nonce"] session.client_os = data.get("client_os", "") session.client_version = data.get("client_version", "") session.ip = get_request_ip(request) try: client_device = Device.objects.get(pk=data["client_device"]) session.client_device = client_device except Device.DoesNotExist: # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they manually run syncmodels. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=data["client_device"], ip=session.ip) return JsonResponse({"error": "Client device matching id could not be found. (id=%s)" % data["client_device"]}, status=500) session.server_nonce = uuid.uuid4().hex session.server_device = Device.get_own_device() if session.client_device.pk == session.server_device.pk: return JsonResponse({"error": "I know myself when I see myself, and you're not me."}, status=500) session.save() else: try: session = SyncSession.objects.get(client_nonce=data["client_nonce"]) except SyncSession.DoesNotExist: return JsonResponse({"error": "Session with specified client nonce could not be found."}, status=500) if session.server_nonce != data["server_nonce"]: return JsonResponse({"error": "Server nonce did not match saved value."}, status=500) if not data.get("signature", ""): return JsonResponse({"error": "Must include signature."}, status=500) if not session.verify_client_signature(data["signature"]): return JsonResponse({"error": "Signature did not match."}, status=500) session.verified = True session.save() # Return the serializd session, in the version intended for the other device return JsonResponse({ "session": serialize([session], dest_version=session.client_version, ensure_ascii=False, sign=False, increment_counters=False ), "signature": session.sign(), })
def register_device(request): """Receives the client device info from the distributed server. Tries to register either because the device has been pre-registered, or because it has a valid INSTALL_CERTIFICATE.""" # attempt to load the client device data from the request data data = simplejson.loads(request.raw_post_data or "{}") if "client_device" not in data: return JsonResponse( {"error": "Serialized client device must be provided."}, status=500) try: # When hand-shaking on the device models, since we don't yet know the version, # we have to just TRY with our own version. # # This is currently "central server" code, so # this will only fail (currently) if the central server version # is less than the version of a client--something that should never happen try: local_version = Device.get_own_device().get_version() models = engine.deserialize(data["client_device"], src_version=local_version, dest_version=local_version) except db_models.FieldDoesNotExist as fdne: raise Exception( "Central server version is lower than client version. This is ... impossible!" ) client_device = models.next().object except Exception as e: return JsonResponse( { "error": "Could not decode the client device model: %r" % e, "code": "client_device_corrupted", }, status=500) # Validate the loaded data if not isinstance(client_device, Device): return JsonResponse( { "error": "Client device must be an instance of the 'Device' model.", "code": "client_device_not_device", }, status=500) if not client_device.verify(): return JsonResponse( { "error": "Client device must be self-signed with a signature matching its own public key.", "code": "client_device_invalid_signature", }, status=500) try: zone = register_self_registered_device(client_device, models, data) except Exception as e: if e.message == "Client not yet on zone.": zone = None else: # Client not on zone: allow fall-through via "old route" # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they visit the registration page. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=client_device.id, ip=get_request_ip(request)) return JsonResponse( { "error": "Failed to validate the chain of trust (%s)." % e, "code": "chain_of_trust_invalid", }, status=500) if not zone: # old code-path try: registration = RegisteredDevicePublicKey.objects.get( public_key=client_device.public_key) if not registration.is_used(): registration.use() elif get_object_or_None(Device, public_key=client_device.public_key): return JsonResponse( { "error": "This device has already been registered", "code": "device_already_registered", }, status=500) else: # If not... we're in a very weird state--we have a record of their # registration, but no device record. # Let's just let the registration happens, so we can refresh things here. # No harm, and some failsafe benefit. # So, pass through... no code :) pass # Use the RegisteredDevicePublicKey, now that we've initialized the device and put it in its zone zone = registration.zone except RegisteredDevicePublicKey.DoesNotExist: try: device = Device.objects.get( public_key=client_device.public_key) return JsonResponse( { "error": "This device has already been registered", "code": "device_already_registered", }, status=500) except Device.DoesNotExist: return JsonResponse( { "error": "Device registration with public key not found; login and register first?", "code": "public_key_unregistered", }, status=500) client_device.save(imported=True) try: device_zone = DeviceZone.objects.get(device=client_device, zone=zone) device_zone.save( ) # re-save, to give it a central server signature that will be honored by old clients except DeviceZone.DoesNotExist: device_zone = DeviceZone(device=client_device, zone=zone) device_zone.save( ) # create the DeviceZone for the new device, with an 'upgraded' signature # return our local (server) Device, its Zone, and the newly created DeviceZone, to the client # Note the order :) # # Addition: always back central server object--in case they didn't get it during install, # they need it for software updating. return JsonResponse( engine.serialize([ Device.get_central_server(), Device.get_own_device(), zone, device_zone ], dest_version=client_device.version, ensure_ascii=False))
def create_session(request): data = simplejson.loads(request.raw_post_data or "{}") if "client_nonce" not in data: return JsonResponseMessageError("Client nonce must be specified.") if len(data["client_nonce"]) != 32 or re.match("[^0-9a-fA-F]", data["client_nonce"]): return JsonResponseMessageError( "Client nonce is malformed (must be 32-digit hex).") if "client_device" not in data: return JsonResponseMessageError("Client device must be specified.") if "server_nonce" not in data: if SyncSession.objects.filter( client_nonce=data["client_nonce"]).count(): return JsonResponseMessageError( "Session already exists; include server nonce and signature.") session = SyncSession() session.client_nonce = data["client_nonce"] session.client_os = data.get("client_os", "") session.client_version = data.get("client_version", "") session.ip = get_request_ip(request) try: client_device = Device.objects.get(pk=data["client_device"]) session.client_device = client_device except Device.DoesNotExist: # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they manually run syncmodels. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=data["client_device"], ip=session.ip) return JsonResponseMessageError( "Client device matching id could not be found. (id=%s)" % data["client_device"]) session.server_nonce = uuid.uuid4().hex session.server_device = Device.get_own_device() if session.client_device.pk == session.server_device.pk: return JsonResponseMessageError( "I know myself when I see myself, and you're not me.") session.save() else: try: session = SyncSession.objects.get( client_nonce=data["client_nonce"]) except SyncSession.DoesNotExist: return JsonResponseMessageError( "Session with specified client nonce could not be found.") if session.server_nonce != data["server_nonce"]: return JsonResponseMessageError( "Server nonce did not match saved value.") if not data.get("signature", ""): return JsonResponseMessageError("Must include signature.") if not session.verify_client_signature(data["signature"]): return JsonResponseMessageError("Signature did not match.") session.verified = True session.save() # Return the serializd session, in the version intended for the other device return JsonResponse({ "session": serialize([session], dest_version=session.client_version, ensure_ascii=False, sign=False, increment_counters=False), "signature": session.sign(), })
def register_device(request): """Receives the client device info from the distributed server. Tries to register either because the device has been pre-registered, or because it has a valid INSTALL_CERTIFICATE.""" # attempt to load the client device data from the request data data = simplejson.loads(request.raw_post_data or "{}") if "client_device" not in data: return JsonResponse({"error": "Serialized client device must be provided."}, status=500) try: # When hand-shaking on the device models, since we don't yet know the version, # we have to just TRY with our own version. # # This is currently "central server" code, so # this will only fail (currently) if the central server version # is less than the version of a client--something that should never happen try: local_version = Device.get_own_device().get_version() models = engine.deserialize(data["client_device"], src_version=local_version, dest_version=local_version) except db_models.FieldDoesNotExist as fdne: raise Exception("Central server version is lower than client version. This is ... impossible!") client_device = models.next().object except Exception as e: return JsonResponse({ "error": "Could not decode the client device model: %r" % e, "code": "client_device_corrupted", }, status=500) # Validate the loaded data if not isinstance(client_device, Device): return JsonResponse({ "error": "Client device must be an instance of the 'Device' model.", "code": "client_device_not_device", }, status=500) if not client_device.verify(): return JsonResponse({ "error": "Client device must be self-signed with a signature matching its own public key.", "code": "client_device_invalid_signature", }, status=500) try: zone = register_self_registered_device(client_device, models, data) except Exception as e: if e.message == "Client not yet on zone.": zone = None else: # Client not on zone: allow fall-through via "old route" # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they visit the registration page. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=client_device.id, ip=get_request_ip(request)) return JsonResponse({ "error": "Failed to validate the chain of trust (%s)." % e, "code": "chain_of_trust_invalid", }, status=500) if not zone: # old code-path try: registration = RegisteredDevicePublicKey.objects.get(public_key=client_device.public_key) if not registration.is_used(): registration.use() elif get_object_or_None(Device, public_key=client_device.public_key): return JsonResponse({ "error": "This device has already been registered", "code": "device_already_registered", }, status=500) else: # If not... we're in a very weird state--we have a record of their # registration, but no device record. # Let's just let the registration happens, so we can refresh things here. # No harm, and some failsafe benefit. # So, pass through... no code :) pass # Use the RegisteredDevicePublicKey, now that we've initialized the device and put it in its zone zone = registration.zone except RegisteredDevicePublicKey.DoesNotExist: try: device = Device.objects.get(public_key=client_device.public_key) return JsonResponse({ "error": "This device has already been registered", "code": "device_already_registered", }, status=500) except Device.DoesNotExist: return JsonResponse({ "error": "Device registration with public key not found; login and register first?", "code": "public_key_unregistered", }, status=500) client_device.save(imported=True) try: device_zone = DeviceZone.objects.get(device=client_device, zone=zone) device_zone.save() # re-save, to give it a central server signature that will be honored by old clients except DeviceZone.DoesNotExist: device_zone = DeviceZone(device=client_device, zone=zone) device_zone.save() # create the DeviceZone for the new device, with an 'upgraded' signature # return our local (server) Device, its Zone, and the newly created DeviceZone, to the client # Note the order :) # # Addition: always back central server object--in case they didn't get it during install, # they need it for software updating. return JsonResponse( engine.serialize([Device.get_central_server(), Device.get_own_device(), zone, device_zone], dest_version=client_device.version, ensure_ascii=False) )
def register_device(request): data = simplejson.loads(request.raw_post_data or "{}") # attempt to load the client device data from the request data if "client_device" not in data: return JsonResponse({"error": "Serialized client device must be provided."}, status=500) try: # When hand-shaking on the device models, since we don't yet know the version, # we have to just TRY with our own version. # # This is currently "central server" code, so # this will only fail (currently) if the central server version # is less than the version of a client--something that should never happen try: own_device = Device.get_own_device() models = serializers.deserialize("versioned-json", data["client_device"], src_version=own_device.get_version(), dest_version=own_device.get_version()) except db_models.FieldDoesNotExist as fdne: raise Exception("Central server version is lower than client version. This is ... impossible!") client_device = models.next().object except Exception as e: return JsonResponse({ "error": "Could not decode the client device model: %r" % e, "code": "client_device_corrupted", }, status=500) if not isinstance(client_device, Device): return JsonResponse({ "error": "Client device must be an instance of the 'Device' model.", "code": "client_device_not_device", }, status=500) if not client_device.verify(): return JsonResponse({ "error": "Client device must be self-signed with a signature matching its own public key.", "code": "client_device_invalid_signature", }, status=500) # we have a valid self-signed Device, so now check if its public key has been registered try: registration = RegisteredDevicePublicKey.objects.get(public_key=client_device.public_key) if registration.is_used(): if Device.objects.get(public_key=client_device.public_key): return JsonResponse({ "error": "This device has already been registered", "code": "device_already_registered", }, status=500) else: # If not... we're in a very weird state--we have a record of their # registration, but no device record. # Let's just let the registration happens, so we can refresh things here. # No harm, and some failsafe benefit. # So, pass through... no code :) pass except RegisteredDevicePublicKey.DoesNotExist: # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they visit the registration page. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=client_device.id, ip=get_request_ip(request)) return JsonResponse({ "error": "Device registration with public key not found; login and register first?", "code": "public_key_unregistered", }, status=500) client_device.signed_by = client_device # the device checks out; let's save it! client_device.save(imported=True) # create the DeviceZone for the new device device_zone = DeviceZone(device=client_device, zone=registration.zone) device_zone.save() # Use the RegisteredDevicePublicKey, now that we've initialized the device and put it in its zone registration.use() # return our local (server) Device, its Zone, and the newly created DeviceZone, to the client return JsonResponse( serializers.serialize("versioned-json", [Device.get_own_device(), registration.zone, device_zone], dest_version=client_device.version, ensure_ascii=False) )
def register_device(request): data = simplejson.loads(request.raw_post_data or "{}") # attempt to load the client device data from the request data if "client_device" not in data: return JsonResponse( {"error": "Serialized client device must be provided."}, status=500) try: # When hand-shaking on the device models, since we don't yet know the version, # we have to just TRY with our own version. # # This is currently "central server" code, so # this will only fail (currently) if the central server version # is less than the version of a client--something that should never happen try: own_device = Device.get_own_device() models = serializers.deserialize( "versioned-json", data["client_device"], src_version=own_device.get_version(), dest_version=own_device.get_version()) except db_models.FieldDoesNotExist as fdne: raise Exception( "Central server version is lower than client version. This is ... impossible!" ) client_device = models.next().object except Exception as e: return JsonResponse( { "error": "Could not decode the client device model: %r" % e, "code": "client_device_corrupted", }, status=500) if not isinstance(client_device, Device): return JsonResponse( { "error": "Client device must be an instance of the 'Device' model.", "code": "client_device_not_device", }, status=500) if not client_device.verify(): return JsonResponse( { "error": "Client device must be self-signed with a signature matching its own public key.", "code": "client_device_invalid_signature", }, status=500) # we have a valid self-signed Device, so now check if its public key has been registered try: registration = RegisteredDevicePublicKey.objects.get( public_key=client_device.public_key) if registration.is_used(): if Device.objects.get(public_key=client_device.public_key): return JsonResponse( { "error": "This device has already been registered", "code": "device_already_registered", }, status=500) else: # If not... we're in a very weird state--we have a record of their # registration, but no device record. # Let's just let the registration happens, so we can refresh things here. # No harm, and some failsafe benefit. # So, pass through... no code :) pass except RegisteredDevicePublicKey.DoesNotExist: # This is the codepath for unregistered devices trying to start a session. # This would only get hit, however, if they visit the registration page. # But still, good to keep track of! UnregisteredDevicePing.record_ping(id=client_device.id, ip=get_request_ip(request)) return JsonResponse( { "error": "Device registration with public key not found; login and register first?", "code": "public_key_unregistered", }, status=500) client_device.signed_by = client_device # the device checks out; let's save it! client_device.save(imported=True) # create the DeviceZone for the new device device_zone = DeviceZone(device=client_device, zone=registration.zone) device_zone.save() # Use the RegisteredDevicePublicKey, now that we've initialized the device and put it in its zone registration.use() # return our local (server) Device, its Zone, and the newly created DeviceZone, to the client return JsonResponse( serializers.serialize( "versioned-json", [Device.get_own_device(), registration.zone, device_zone], dest_version=client_device.version, ensure_ascii=False))