Basic support for token authentication on request level

platypush/__init__.py

@@ -78,7 +78,11 @@ class Daemon(object):
                 msg -- platypush.message.Message instance """
 
             if isinstance(msg, Request):
-                msg.execute(n_tries=self.n_tries)
+                try:
+                    msg.execute(n_tries=self.n_tries)
+                except PermissionError:
+                    logger.info('Dropped unauthorized request: {}'.format(msg))
+
                 self.processed_requests += 1
                 if self.requests_to_process \
                         and self.processed_requests >= self.requests_to_process:

platypush/backend/http/__init__.py

@@ -180,7 +180,11 @@ class HttpBackend(Backend):
             self.logger.info('Received message on the HTTP backend: {}'.format(msg))
 
             if isinstance(msg, Request):
-                response = msg.execute(async=False)
+                try:
+                    response = msg.execute(async=False)
+                except PermissionError:
+                    abort(401)
+
                 self.logger.info('Processing response on the HTTP backend: {}'.format(msg))
                 return str(response)
             elif isinstance(msg, Event):

platypush/config/__init__.py

@@ -6,6 +6,7 @@ import sys
 import time
 import yaml
 
+from platypush.utils import get_hash
 
 """ Config singleton instance """
 _default_config_instance = None
@@ -18,8 +19,6 @@ class Config(object):
             Config.init()
         - Initialize config from a custom path
             Config.init(config_file_path)
-        - Set a value
-            Config.set('foo', 'bar')
         - Get a value
             Config.get('foo')
     """
@@ -60,6 +59,9 @@ class Config(object):
         self._cfgfile = cfgfile
         self._config = self._read_config_file(self._cfgfile)
 
+        if 'token' in self._config:
+            self._config['token_hash'] = get_hash(self._config['token'])
+
         if 'workdir' not in self._config:
             self._config['workdir'] = self._workdir_location
         os.makedirs(self._config['workdir'], exist_ok=True)
@@ -242,20 +244,7 @@ class Config(object):
         """
         global _default_config_instance
         if _default_config_instance is None: _default_config_instance = Config()
-        return _default_config_instance._config[key]
+        return _default_config_instance._config.get(key)
-
-    @staticmethod
-    def set(key, value):
-        """
-        Sets a config value
-        Params:
-            key   -- Config key to set
-            value -- Value for key
-        """
-        global _default_config_instance
-        if _default_config_instance is None: _default_config_instance = Config()
-        _default_config_instance._config[key] = key
-
 
 
 # vim:sw=4:ts=4:et:

platypush/message/request/__init__.py

@@ -8,10 +8,11 @@ import traceback
 
 from threading import Thread
 
+from platypush.config import Config
 from platypush.context import get_plugin
 from platypush.message import Message
 from platypush.message.response import Response
-from platypush.utils import get_module_and_method_from_action
+from platypush.utils import get_hash, get_module_and_method_from_action
 
 logger = logging.getLogger(__name__)
 
@@ -19,7 +20,8 @@ logger = logging.getLogger(__name__)
 class Request(Message):
     """ Request message class """
 
-    def __init__(self, target, action, origin=None, id=None, backend=None, args=None):
+    def __init__(self, target, action, origin=None, id=None, backend=None,
+                 args=None, token=None):
         """
         Params:
             target -- Target node [String]
@@ -28,6 +30,7 @@ class Request(Message):
                 id -- Message ID, or None to get it auto-generated
            backend -- Backend connected to the request, where the response will be delivered
               args -- Additional arguments for the action [Dict]
+             token -- Authorization token, if required on the server [Str]
         """
 
         self.id      = id if id else self._generate_id()
@@ -36,6 +39,7 @@ class Request(Message):
         self.origin  = origin
         self.args    = args if args else {}
         self.backend = backend
+        self.token   = token
 
     @classmethod
     def build(cls, msg):
@@ -48,6 +52,7 @@ class Request(Message):
 
         args['id'] = msg['id'] if 'id' in msg else cls._generate_id()
         if 'origin' in msg: args['origin'] = msg['origin']
+        if 'token' in msg: args['token'] = msg['token']
         return cls(**args)
 
     @staticmethod
@@ -201,6 +206,12 @@ class Request(Message):
                 self._send_response(response)
                 return response
 
+        token_hash = Config.get('token_hash')
+
+        if token_hash:
+            if self.token is None or get_hash(self.token) != token_hash:
+                raise PermissionError()
+
         if async:
             Thread(target=_thread_func, args=(n_tries,)).start()
         else:

platypush/plugins/__init__.py

@@ -5,6 +5,12 @@ from platypush.config import Config
 from platypush.message.response import Response
 
 
+def action(f):
+    def _execute_action(*args, **kwargs):
+        return f(*args, **kwargs)
+    return _execute_action
+
+
 class Plugin(object):
     """ Base plugin class """
 

platypush/utils/__init__.py

@@ -1,4 +1,5 @@
 import errno
+import hashlib
 import importlib
 import logging
 import os
@@ -65,5 +66,9 @@ def clear_timeout():
     signal.alarm(0)
 
 
+def get_hash(s):
+    return hashlib.sha256(s.encode('utf-8')).hexdigest()
+
+
 # vim:sw=4:ts=4:et: