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Code Issues Releases Wiki Activity

Merge pull request #37 from avatao-content/require_signature

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Require signature
This commit is contained in:
Bokros Bálint 2018-07-23 17:27:04 +02:00 committed by GitHub
commit f58f362e46
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 30 additions and 17 deletions
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34
lib/tfw/components/fsm_managing_event_handler.py
View File

@ -2,18 +2,19 @@
# All Rights Reserved. See LICENSE file for details.
from tfw import EventHandlerBase
from tfw.crypto import KeyManager, sign_message
from tfw.crypto import KeyManager, sign_message, verify_message
from tfw.config.logs import logging
LOG = logging.getLogger(__name__)
class FSMManagingEventHandler(EventHandlerBase):
def __init__(self, key, fsm_type):
def __init__(self, key, fsm_type, require_signature=False):
super().__init__(key)
self.fsm = fsm_type()
self._fsm_updater = FSMUpdater(self.fsm)
self.auth_key = KeyManager().auth_key
self._require_signature = require_signature
self.command_handlers = {
'trigger': self.handle_trigger,
@ -22,24 +23,29 @@ class FSMManagingEventHandler(EventHandlerBase):
def handle_event(self, message):
try:
data = message['data']
message['data'] = self.command_handlers[data['command']](data)
fsm_update_message = self._fsm_updater.generate_fsm_update()
sign_message(self.auth_key, message)
sign_message(self.auth_key, fsm_update_message)
self.server_connector.broadcast(fsm_update_message)
message = self.command_handlers[message['data']['command']](message)
if message:
fsm_update_message = self._fsm_updater.generate_fsm_update()
sign_message(self.auth_key, message)
sign_message(self.auth_key, fsm_update_message)
self.server_connector.broadcast(fsm_update_message)
return message
except KeyError:
LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
def handle_trigger(self, data):
trigger = data['value']
self.fsm.step(trigger)
return data
def handle_trigger(self, message):
trigger = message['data']['value']
if self._require_signature:
if not verify_message(self.auth_key, message):
LOG.error('Ignoring unsigned trigger command: %s', message)
return None
if self.fsm.step(trigger):
return message
return None
def handle_update(self, data):
def handle_update(self, message):
# pylint: disable=no-self-use
return data
return message
class FSMUpdater:

2
lib/tfw/fsm_base.py
View File

@ -62,5 +62,7 @@ class FSMBase(Machine, CallbackMixin):
try:
self.trigger(trigger)
self.trigger_history.append(trigger)
return True
except (AttributeError, MachineError):
LOG.debug('FSM failed to execute nonexistent trigger: "%s"', trigger)
return False

11
lib/tfw/networking/server/tfw_server.py
View File

@ -9,6 +9,7 @@ from tornado.web import Application
from tfw.networking.event_handlers import ServerUplinkConnector
from tfw.networking.server import EventHandlerConnector
from tfw.networking import MessageSender
from tfw.crypto import KeyManager, verify_message, sign_message
from tfw.config.logs import logging
from .zmq_websocket_proxy import ZMQWebSocketProxy
@ -24,6 +25,7 @@ class TFWServer:
def __init__(self):
self._event_handler_connector = EventHandlerConnector()
self._uplink_connector = ServerUplinkConnector()
self._auth_key = KeyManager().auth_key
self.application = Application([(
r'/ws', ZMQWebSocketProxy, {
@ -37,13 +39,16 @@ class TFWServer:
def handle_trigger(self, message):
if 'trigger' in message:
LOG.debug('Executing handler for trigger "%s"', message.get('trigger', ''))
self._uplink_connector.send_to_eventhandler({
fsm_eh_command = {
'key': 'fsm',
'data': {
'command': 'trigger',
'value': message.get('trigger', '')
'value': message['trigger']
}
})
}
if verify_message(self._auth_key, message):
sign_message(self._auth_key, fsm_eh_command)
self._uplink_connector.send_to_eventhandler(fsm_eh_command)
def handle_recover(self, message):
if message['key'] == 'recover':