Onionr/src/bigbrother/ministry/ofcommunication.py

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"""Onionr - Private P2P Communication.
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Ensure sockets don't get made to non localhost
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"""
import ipaddress
import logger
from onionrexceptions import NetworkLeak
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"""
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.
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a socket connection happens.
raises exception & logs if not to loopback
"""
ip_address = socket_event[1][0]
if ip_address.startswith('/'):
return
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# validate is valid ip address (no hostname, etc)
# raises NetworkLeak if not
try:
ip_address = ipaddress.ip_address(ip_address)
except ValueError:
logger.warn(f'Conn made to {ip_address} outside of Tor/similar')
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raise \
NetworkLeak('Conn to host/non local IP, this is a privacy issue!')
# Validate that the IP is localhost ipv4
if not ip_address.is_loopback and not ip_address.is_multicast \
and not ip_address.is_private:
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logger.warn(f'Conn made to {ip_address} outside of Tor/similar')
raise NetworkLeak('Conn to non local IP, this is a privacy concern!')