added big brother event auditor

src/__init__.py

@@ -1,12 +1,12 @@
 #!/usr/bin/env python3
-'''
+"""
     Onionr - Private P2P Communication
 
     This file initializes Onionr when ran to be a daemon or with commands
 
     Run with 'help' for usage.
-'''
-'''
+"""
+"""
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
@@ -19,7 +19,7 @@
 
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
-'''
+"""
 
 # Set the user's locale for encoding reasons
 import locale # noqa
@@ -37,8 +37,12 @@ except ModuleNotFoundError as e:
     print('Onionr needs ' + str(e) + ' installed')
 
 # Onionr imports
-from etc import onionrvalues # For different Onionr related constants such as versions
-import onionrsetup as setup
+
+# For different Onionr related constants such as versions
+from etc import onionrvalues # noqa
+
+import onionrexceptions # noqa
+import onionrsetup as setup # noqa
 
 min_ver = onionrvalues.MIN_PY_VERSION
 
@@ -51,10 +55,20 @@ if sys.version_info[0] == 2 or sys.version_info[1] < min_ver:
 from utils import createdirs
 createdirs.create_dirs()
 
-from onionrcommands import parser
-from onionrplugins import onionrevents as events
+import bigbrother # noqa
+from onionrcommands import parser # noqa
+from onionrplugins import onionrevents as events # noqa
 
 setup.setup_config()
+
+import config # noqa
+
+if config.get('advanced.security_auditing', True):
+    try:
+        bigbrother.enable_ministries()
+    except onionrexceptions.PythonVersion:
+        pass
+
 setup.setup_default_plugins()
 
 

src/bigbrother/__init__.py

@@ -0,0 +1,43 @@
+"""
+    Onionr - Private P2P Communication
+
+    Processes interpreter hook events to detect security leaks
+"""
+import sys
+from typing import Iterable
+
+from onionrexceptions import PythonVersion
+from . import ministry
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+def _auditing_supported():
+    try:
+        sys.audit
+        sys.addaudithook
+    except AttributeError:
+        raise PythonVersion('Auditing not supported interpreter')
+
+
+def sys_hook_entrypoint(event, info):
+    if event == 'socket.connect':
+        ministry.ofcommunication.detect_socket_leaks(info)
+
+
+def enable_ministries(disable_hooks: Iterable = []):
+    """Enable auditors"""
+    _auditing_supported()  # raises PythonVersion exception if <3.8
+    sys.addaudithook(sys_hook_entrypoint)

src/bigbrother/ministry/__init__.py

@@ -0,0 +1 @@
+from . import ofcommunication

src/bigbrother/ministry/ofcommunication.py

@@ -0,0 +1,38 @@
+"""
+    Onionr - Private P2P Communication
+
+    Ensure sockets don't get made to non localhost
+"""
+import ipaddress
+
+import logger
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+def detect_socket_leaks(socket_event):
+    """is called by the big brother broker whenever
+    a socket connection happens.
+    raises exception & logs if not to loopback
+    """
+    ip_address = socket_event[1][0]
+
+    # validate is valid ip address (no hostname, etc)
+    # raises valueerror if not
+    ipaddress.ip_address(ip_address)
+
+    if not ip_address.startswith('127'):
+        logger.warn(f'Conn made to {ip_address} outside of Tor/similar')
+        raise ValueError('Conn to non loopback IP, this is a privacy concern!')

src/onionrexceptions.py

@@ -104,3 +104,6 @@ class MissingAddress(Exception):
 
 class ContactDeleted(Exception):
     pass
+
+class PythonVersion(Exception):
+    pass