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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the ?copyright? line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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
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This program is distributed in the hope that it will be useful,
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an ?about box?.
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The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.

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exclude *.pyc .DS_Store .gitignore MANIFEST.in
include setup.py
include distribute_setup.py
include README.md
include LICENSE
recursive-include bin *
recursive-include opensnitch *.py

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# OpenSnitch
OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.
<p align="center">
<img src="https://raw.githubusercontent.com/evilsocket/opensnitch/master/screenshot.png" alt="OpenSnitch"/>
</p>
**Warning: This is still alpha quality software, don't rely on it (yet) for your computer security.**
## Requirements
You'll need a GNU/Linux distribution with `iptables`, `NFQUEUE` and `ftrace` kernel support. In addition, you'll need the following package dependencies:
### Debian/Ubuntu:
sudo apt install build-essential \
libcap-dev \
libnetfilter-queue-dev \
python3-dbus \
python3-dev \
python3-gi \
python3-pyinotify \
python3-pyqt5 \
python3-setuptools
### Fedora:
sudo dnf install @C-development \
libcap-devel \
libnetfilter_queue-devel \
python3-dbus \
python3-devel \
python3-inotify \
python3-qt5 \
python3-setuptools
### Arch:
There is an AUR package available at https://aur.archlinux.org/packages/opensnitch-git/
## Build and Install
cd opensnitch
sudo python3 setup.py install
## Run
sudo -HE opensnitchd
opensnitch-qt
## Known Issues / Future Improvements
Before opening an issue, keep in mind that the current implementation is just an experiment to see the doability of the project, future improvements of OpenSnitch will include:
Split the project into `opensnitchd`, `opensnitch-ui` and `opensnitch-ruleman`:
* `opensnitchd` will be a (C++ ? TBD) daemon, running as root with the main logic. It'll fix [this](https://github.com/evilsocket/opensnitch/issues/28).
* `opensnitch-ui` python (?) UI running as normal user, getting the daemon messages. Will fix [this](https://github.com/evilsocket/opensnitch/issues/20).
* `opensnitch-ruleman` python (?) UI for rule editing.
## How Does It Work
OpenSnitch is an application level firewall, meaning then while running, it will detect and alert the user for every outgoing connection applications he's running are creating. This can be extremely **effective to detect and block unwanted connections** on your system that might be caused by a security breach, **causing data exfiltration to be much harder for an attacker**.
In order to do that, OpenSnitch relies on `NFQUEUE`, an `iptables` target/extension which allows an userland software to intercept IP packets and either `ALLOW` or `DROP` them, once started it'll install the following iptables rules:
OUTPUT -t mangle -m conntrack --ctstate NEW -j NFQUEUE --queue-num 0 --queue-bypass
This will use `conntrack` iptables extension to pass all newly created connection packets to NFQUEUE number 0 (the one OpenSnitch is listening on), and then:
INPUT --protocol udp --sport 53 -j NFQUEUE --queue-num 0 --queue-bypass
This will also redirect DNS queries to OpenSnitch, allowing the software to perform and IP -> hostname resolution without performing active DNS queries itself.
Once a new connection is detected, the software relies on the `ftrace` kernel extension in order to track which PID (therefore which process) is creating the connection.
If `ftrace` is not available for your kernel, OpenSnitch will fallback using the `/proc` filesystem, even if this method will also work, it's vulnerable to application path manipulation as [described in this issue](https://github.com/evilsocket/opensnitch/issues/12), therefore **it's highly suggested to run OpenSnitch on a ftrace enabled kernel**.
## TODOs
grep -r TODO opensnitch | cut -d '#' -f 2 | sort -u
## License
This project is copyleft of [Simone Margaritelli](http://www.evilsocket.net/) and released under the GPL 3 license.

44
bin/opensnitch-qt
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@ -1,44 +0,0 @@
#!/usr/bin/env python3
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from argparse import ArgumentParser
from opensnitch.ui import QtApp
import logging
import signal
parser = ArgumentParser()
parser.add_argument("--debug", dest="debug",
action="store_true", default=False,
help="Enable debug logs")
if __name__ == '__main__':
args = parser.parse_args()
logging.basicConfig(
format='[%(asctime)s] (%(levelname)s) %(message)s',
level=logging.INFO if args.debug is False else logging.DEBUG)
# Handle ctrl-c
# note that this will cause any finally blocks and similar cleanups
# to not get executed
signal.signal(signal.SIGINT, signal.SIG_DFL)
app = QtApp()
app.run()

105
bin/opensnitchd
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@ -1,105 +0,0 @@
#!/usr/bin/env python3
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from argparse import ArgumentParser
from os.path import expanduser
import warnings
import logging
import prctl
import pwd
import sys
import os
# Ensure Qt4 wont be loaded by matplotlib
try:
import matplotlib as mpl
except ImportError:
pass
else:
mpl.rcParams['backend'] = 'Qt5Agg'
from opensnitch.version import VERSION
from opensnitch.snitch import Snitch
REQUIRED_CAPS = ((prctl.CAP_NET_RAW, prctl.ALL_FLAGS, True),
(prctl.CAP_DAC_OVERRIDE, prctl.ALL_FLAGS, True),
(prctl.CAP_NET_ADMIN, prctl.ALL_FLAGS, True))
parser = ArgumentParser()
parser.add_argument("--log-file", dest="logfile", default=None,
help="Log to file", metavar="FILE")
parser.add_argument("--debug", dest="debug",
action="store_true", default=False,
help="Enable debug logs")
parser.add_argument("--database", dest="database", default=None,
help="Database path", metavar="FILE")
parser.add_argument("--user", dest="user",
default=os.environ.get('SUDO_USER', 'root'),
help="Run as user")
# At some point Scapy devs will realize how bothering their fucking warnings
# are while importing scapy.all ...
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
warnings.filterwarnings("ignore", category=RuntimeWarning, module="gtk")
if __name__ == '__main__':
args = parser.parse_args()
logging.basicConfig(
format='[%(asctime)s] (%(levelname)s) %(message)s',
level=logging.INFO if args.debug is False else logging.DEBUG,
filename=args.logfile)
if not os.geteuid() == 0:
sys.exit('OpenSnitch must be run as root.')
if 'DBUS_SESSION_BUS_ADDRESS' not in os.environ:
raise RuntimeError('DBUS_SESSION_BUS_ADDRESS not set')
# set_keepcaps allows us to keep caps across setuid call
prctl.set_keepcaps(True)
prctl.set_caps(*REQUIRED_CAPS)
user = pwd.getpwnam(args.user)
os.setgid(user.pw_gid)
os.setuid(user.pw_uid)
# The effective capability set is cleared on setuid
# Re-set the effective set
prctl.set_caps(*REQUIRED_CAPS)
dbfile = args.database or os.path.join(
expanduser("~%s" % args.user), "opensnitch.db")
snitch = Snitch(dbfile)
try:
logging.info("OpenSnitch v%s running with pid %d.",
VERSION, os.getpid())
snitch.start()
except KeyboardInterrupt as e:
pass
finally:
logging.info("Quitting ...")
snitch.stop()
# Temporary hack to handle Ctrl-C
os.kill(os.getpid(), 15)

73
index.html Normal file
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@ -0,0 +1,73 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>OpenSnitch</title>
<meta name="description" content="OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.">
<link rel="icon" href="https://www.evilsocket.net/images/favicon.ico">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<link rel="stylesheet" href="https://getbootstrap.com/examples/cover/cover.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</head>
<body>
<div class="site-wrapper">
<div class="site-wrapper-inner">
<div class="cover-container">
<div class="masthead clearfix">
<div class="inner">
<nav>
<ul class="nav masthead-nav">
<li><a href="https://github.com/evilsocket/opensnitch">Download</a></li>
<li><a href="https://github.com/evilsocket/opensnitch/issues">Bug Tracker</a></li>
</ul>
</nav>
</div>
</div>
<div class="inner cover">
<h1 class="cover-heading">OpenSnitch</h1>
<p class="lead">OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.</p>
<p class="lead" align="center">
<img src="https://raw.githubusercontent.com/evilsocket/opensnitch/master/screenshot.png" alt="OpenSnitch"/>
</p>
<p class="lead" align="center">
<iframe src="https://ghbtns.com/github-btn.html?user=evilsocket&repo=opensnitch&type=star&count=true&size=large" frameborder="0" scrolling="0" width="150px" height="30px"></iframe>
</p>
<p class="lead">
<a href="https://github.com/evilsocket/opensnitch" class="btn btn-lg btn-default">Learn more</a>
</p>
</div>
<div class="mastfoot">
<div class="inner">
<p>OpenSnitch was made <span style="color:red">♥</span> by <a href="https://twitter.com/evilsocket" target="_blank" >Simone 'evilsocket' Margaritelli</a></p>
</div>
</div>
</div>
</div>
</div>
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-98436807-1', 'auto');
ga('send', 'pageview');
</script>
</body>
</html>

0
opensnitch/__init__.py
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85
opensnitch/connection.py
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@ -1,85 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from collections import namedtuple
from socket import inet_ntoa
from opensnitch import proc
from dpkt import ip
Application = namedtuple('Application', ('pid', 'path', 'cmdline'))
_Connection = namedtuple('Connection', (
'id',
'data',
'pkt',
'src_addr',
'dst_addr',
'hostname',
'src_port',
'dst_port',
'proto',
'app'))
def Connection(procmon, dns, packet_id, payload):
data = payload
pkt = ip.IP(data)
src_addr = inet_ntoa(pkt.src)
dst_addr = inet_ntoa(pkt.dst)
hostname = dns.get_hostname(dst_addr)
src_port = None
dst_port = None
proto = None
app = None
if pkt.p == ip.IP_PROTO_TCP:
proto = 'tcp'
src_port = pkt.tcp.sport
dst_port = pkt.tcp.dport
elif pkt.p == ip.IP_PROTO_UDP:
proto = 'udp'
src_port = pkt.udp.sport
dst_port = pkt.udp.dport
elif pkt.p == ip.IP_PROTO_ICMP:
proto = 'icmp'
src_port = None
dst_port = None
if proto == 'icmp':
app = Application(None, None, None)
elif None not in (proto, src_addr, dst_addr):
pid = proc.get_pid_by_connection(src_addr,
src_port,
dst_addr,
dst_port,
proto)
app = Application(
pid, *proc._get_app_path_and_cmdline(procmon, pid))
return _Connection(
packet_id,
data,
pkt,
src_addr,
dst_addr,
hostname,
src_port,
dst_port,
proto,
app)

89
opensnitch/dbus_service.py
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@ -1,89 +0,0 @@
from gi.repository import GLib
import dbus.mainloop.glib
import dbus.mainloop
import dbus.service
import dbus
import logging
from opensnitch.rule import RuleSaveOption, RuleVerdict
BUS_NAME = 'io.opensnitch.service'
OBJECT_PATH = '/'
class OpensnitchService(dbus.service.Object):
def __init__(self, handlers, rules):
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SessionBus()
bus_name = dbus.service.BusName(BUS_NAME, bus=bus)
self.handlers = handlers
self._rules = rules
super().__init__(bus_name, OBJECT_PATH)
@dbus.service.signal(BUS_NAME, signature='usqssuss')
def prompt(self, connection_id,
hostname,
dst_port,
dst_addr,
proto,
app_pid,
app_path,
app_cmdline):
# Signal is emitted by calling decorated function
logging.debug('Prompting connection id %s', connection_id)
@dbus.service.method(BUS_NAME, in_signature='iiib', out_signature='b')
def connection_set_result(self, connection_id, save_option,
verdict, apply_to_all):
save_option = int(save_option)
verdict = int(verdict)
apply_to_all = bool(apply_to_all)
try:
handler = self.handlers[int(connection_id)]
except KeyError:
return
else:
try:
handler.future.set_result((save_option,
verdict,
apply_to_all))
except Exception as e:
logging.debug('Could not set result %s', e)
if RuleSaveOption(save_option) != RuleSaveOption.ONCE:
self._rules.add_rule(handler.conn, RuleVerdict(verdict),
apply_to_all, save_option)
@dbus.service.method(BUS_NAME,
in_signature='i', out_signature='b')
def connection_recheck_verdict(self, connection_id):
try:
handler = self.handlers[int(connection_id)]
except KeyError:
# If connection is not found or verdict is set connection is
# considered to be handled
return True
else:
conn = handler.conn
verd = self._rules.get_verdict(conn)
if verd is None:
return False
handler.future.set_result((RuleSaveOption.ONCE,
verd,
False)) # Apply to all
return True
def run(self):
loop = GLib.MainLoop()
loop.run()

64
opensnitch/dns.py
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@ -1,64 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from scapy.all import DNSRR, DNS
from threading import Lock
import logging
class DNSCollector:
def __init__(self):
self.lock = Lock()
self.hosts = {'127.0.0.1': 'localhost'}
def add_response(self, packet):
if packet.haslayer(DNS) and packet.haslayer(DNSRR):
with self.lock:
try:
a_count = packet[DNS].ancount
i = a_count + 4
while i > 4:
hostname = packet[0][i].rrname
address = packet[0][i].rdata
i -= 1
if hostname == b'.':
continue
elif hostname.endswith(b'.'):
hostname = hostname[:-1]
# for CNAME records
if address.endswith('.'):
address = address[:-1]
logging.debug("Adding DNS response: %s => %s", address, hostname) # noqa
self.hosts[address] = hostname.decode()
except Exception as e:
logging.debug("Error while parsing DNS response: %s" % e)
return True
else:
return False
def get_hostname(self, address):
try:
return self.hosts[address]
except KeyError:
logging.debug("No hostname found for address %s" % address)
return address

85
opensnitch/iptables.py
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@ -1,85 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Adam Hose
# adis@blad.is
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
import iptc
class IPTCRules:
def __init__(self):
self.insert_dns_rule()
self.insert_connection_packet_rules()
self.insert_reject_rule()
def remove(self):
table = iptc.Table(iptc.Table.FILTER)
chain = iptc.Chain(table, 'INPUT')
for r in chain.rules:
chain.delete_rule(r)
table = iptc.Table(iptc.Table.FILTER)
chain = iptc.Chain(table, 'OUTPUT')
for r in chain.rules:
chain.delete_rule(r)
table = iptc.Table(iptc.Table.FILTER)
chain = iptc.Chain(table, 'MANGLE')
for r in chain.rules:
chain.delete_rule(r)
def insert_dns_rule(self):
"""Get DNS responses"""
table = iptc.Table(iptc.Table.FILTER)
chain = iptc.Chain(table, 'INPUT')
rule = iptc.Rule()
rule.protocol = 'udp'
m = rule.create_match('udp')
m.sport = '53'
t = rule.create_target('NFQUEUE')
t.set_parameter('queue-num', str(0))
t.set_parameter('queue-bypass')
chain.insert_rule(rule)
def insert_connection_packet_rules(self):
table = iptc.Table(iptc.Table.MANGLE)
chain = iptc.Chain(table, 'OUTPUT')
rule = iptc.Rule()
t = rule.create_target('NFQUEUE')
t.set_parameter('queue-num', str(0))
t.set_parameter('queue-bypass')
m = rule.create_match('conntrack')
m.set_parameter('ctstate', 'NEW')
chain.insert_rule(rule)
def insert_reject_rule(self):
table = iptc.Table(iptc.Table.MANGLE)
chain = iptc.Chain(table, 'OUTPUT')
rule = iptc.Rule()
rule.protol = 'tcp'
rule.create_target('REJECT')
m = rule.create_match('mark')
m.mark = '0x18ba5'
chain.insert_rule(rule)

79
opensnitch/proc.py
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@ -1,79 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# https://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
import logging
import psutil
import os
def get_pid_by_connection(src_addr, src_p, dst_addr, dst_p, proto='tcp'):
# We always take the first element as we assume it contains only one
# It should not be possible to keep two connections which are the same.
for conn in psutil.net_connections(kind=proto):
if proto == 'tcp':
if conn.laddr != (src_addr, int(src_p)):
continue
if conn.raddr != (dst_addr, int(dst_p)):
continue
# UDP gives us a very limited dataset to work with
elif proto == 'udp':
if conn.laddr[1] != int(src_p):
continue
return conn.pid
logging.warning("Could not find process for %s connection %s:%s -> %s:%s",
proto,
src_addr,
src_p,
dst_addr,
dst_p)
return None
def _get_app_path_and_cmdline(procmon, pid):
path, args = None, None
if pid is None:
return (path, args)
pmr = procmon.get_app(pid)
if pmr:
path = pmr.get('filename')
args = pmr.get('args')
if not path:
logging.debug("Could not find pid %s with ProcMon, falling back to /proc/%s/exe -> %s", pid, pid, path or '?') # noqa
try:
path = os.readlink("/proc/{}/exe".format(pid))
except Exception as e:
logging.exception(e)
if not args:
logging.debug(
"Could not find pid %s command line with ProcMon", pid) # noqa
try:
with open("/proc/{}/cmdline".format(pid)) as cmd_fd:
cmd_fd.read().replace('\0', ' ').strip()
except Exception as e:
logging.exception(e)
return (path, args)

161
opensnitch/procmon.py
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@ -1,161 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from collections import defaultdict
import threading
import logging
import re
def writefile(path, value, mode="w"):
with open(path, mode) as f:
return f.write(value)
class ProcMon(threading.Thread):
PROBE_NAME = "opensnitch_sys_execve"
def __init__(self):
threading.Thread.__init__(self)
self.pids = defaultdict(dict)
self.lock = threading.Lock()
self.running = False
self.daemon = True
@staticmethod
def enable():
ProcMon.disable(False)
logging.info("Enabling ProcMon ...")
for d in ('sched_process_fork',
'sched_process_exec',
'sched_process_exit'):
f = "/sys/kernel/debug/tracing/events/sched/%s/enable" % d
writefile(f, "1")
# Create the custom execve kprobe consumer
# Command line args will be in %si, we're asking ftrace for them
with open("/sys/kernel/debug/tracing/kprobe_events", "w") as f:
f.write("p:kprobes/%s sys_execve" % (ProcMon.PROBE_NAME,))
for i in range(1, 16):
f.write(" arg%d=+0(+%d(%%si)):string" % (i, i*8))
writefile("/sys/kernel/debug/tracing/events/kprobes/%s/enable" % ProcMon.PROBE_NAME, "1") # noqa
@staticmethod
def disable(verbose=True):
if verbose:
logging.info("Disabling ProcMon ...")
try:
for d in ('sched_process_fork',
'sched_process_exec',
'sched_process_exit'):
f = "/sys/kernel/debug/tracing/events/sched/%s/enable" % d
writefile(f, "0")
writefile("/sys/kernel/debug/tracing/events/kprobes/%s/enable" % ProcMon.PROBE_NAME, "0") # noqa
writefile("/sys/kernel/debug/tracing/kprobe_events", "-:%s" % ProcMon.PROBE_NAME, mode="a+") # noqa
writefile("/sys/kernel/debug/tracing/trace", "")
except:
pass
@staticmethod
def is_ftrace_available():
try:
with open("/proc/sys/kernel/ftrace_enabled", "rt") as fp:
return fp.read().strip() == '1'
except:
pass
return False
def get_app(self, pid):
return self.pids[pid] or None
def _on_exec(self, pid, filename):
with self.lock:
p = self.pids[pid]
p['filename'] = filename
logging.debug("(pid=%d) %s %s",
pid,
filename,
p.get('args', ''))
def _on_args(self, pid, args):
with self.lock:
self.pids[pid]['args'] = args
def _on_exit(self, pid):
try:
del self.pids[pid]
except KeyError:
pass
def run(self):
logging.info("ProcMon running ...")
self.running = True
with open("/sys/kernel/debug/tracing/trace_pipe", 'rb') as pipe:
PROBE_NAME = ProcMon.PROBE_NAME.encode()
while True:
try:
line = pipe.readline()
if PROBE_NAME in line:
m = re.search(b'^.*?\-(\d+)\s*\[', line)
if m is None:
continue
pid = int(m.group(1))
# "walk" over every argument field, 'fault' is our terminator. # noqa
# If we see it it means that there are more cmdline args. # noqa
if b'(fault)' in line:
line = line[:line.find(b'(fault)')]
args = b' '.join(
re.findall(b'arg\d+="(.*?)"', line))
self._on_args(pid, args.decode())
else:
m = re.search(b'sched_process_(.*?):', line)
if m is None:
continue
event = m.group(1)
if event == b'exec':
filename = re.search(
b'filename=(.*?)\s+pid=', line).group(1)
pid = int(
re.search(b'\spid=(\d+)', line).group(1))
self._on_exec(pid, filename.decode())
elif event == b'exit':
mm = re.search(
b'\scomm=(.*?)\s+pid=(\d+)', line)
# command = mm.group(1)
pid = int(mm.group(2))
self._on_exit(pid)
except Exception as e:
logging.warning(e)

157
opensnitch/rule.py
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@ -1,157 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from collections import namedtuple
from threading import Lock
from enum import Enum
import logging
import sqlite3
Rule = namedtuple('Rule', ('app_path',
'verdict',
'address',
'port',
'proto'))
class RuleVerdict(Enum):
ACCEPT = 0
DROP = 1
class RuleSaveOption(Enum):
ONCE = 0
UNTIL_QUIT = 1
FOREVER = 2
def matches(rule, conn):
if rule.app_path != conn.app.path:
return False
elif rule.address is not None and rule.address != conn.dst_addr:
return False
elif rule.port is not None and rule.port != conn.dst_port:
return False
elif rule.proto is not None and rule.proto != conn.proto:
return False
else:
return True
class Rules:
def __init__(self, database):
self.mutex = Lock()
db = self.db = RulesDB(database)
self.rules = {}
with db._lock:
for r in db._load_rules():
self._add_rule(r)
def get_verdict(self, connection):
with self.mutex:
for r in self.rules.get(connection.app.path, []):
if matches(r, connection):
return r.verdict
return None
def _remove_rules_for_path(self, path, remove_from_db=False):
try:
del self.rules[path]
except KeyError:
pass
if remove_from_db is True:
self.db.remove_all_app_rules(path)
def _add_rule(self, rule):
self.rules.setdefault(rule.app_path, set()).add(rule)
def add_rule(self, connection, verdict, apply_to_all=False,
save_option=RuleSaveOption.UNTIL_QUIT.value):
with self.mutex:
logging.debug("Adding %s rule for '%s' (all=%s)",
"ALLOW" if RuleVerdict(verdict) == RuleVerdict.ACCEPT else "DENY", # noqa
connection,
"true" if apply_to_all is True else "false")
if apply_to_all is True:
self._remove_rules_for_path(
connection.app.path,
(RuleSaveOption(save_option) == RuleSaveOption.FOREVER))
r = Rule(
connection.app.path,
verdict,
connection.dst_addr if not apply_to_all else None,
connection.dst_port if not apply_to_all else None,
connection.proto if not apply_to_all else None)
self._add_rule(r)
if RuleSaveOption(save_option) == RuleSaveOption.FOREVER:
self.db.save_rule(r)
class RulesDB:
def __init__(self, filename):
self._filename = filename
self._lock = Lock()
logging.info("Using rules database from %s" % filename)
self._create_table()
# Only call with lock!
def _get_conn(self):
return sqlite3.connect(self._filename)
def _create_table(self):
with self._lock:
conn = self._get_conn()
c = conn.cursor()
c.execute("CREATE TABLE IF NOT EXISTS rules (app_path TEXT, verdict INTEGER, address TEXT, port INTEGER, proto TEXT, UNIQUE (app_path, verdict, address, port, proto))") # noqa
def _load_rules(self):
conn = self._get_conn()
c = conn.cursor()
c.execute("SELECT * FROM rules")
for item in c.fetchall():
yield Rule(*item)
def save_rule(self, rule):
with self._lock:
conn = self._get_conn()
c = conn.cursor()
c.execute("INSERT INTO rules VALUES (?, ?, ?, ?, ?)", (rule.app_path, rule.verdict.value, rule.address, rule.port, rule.proto,)) # noqa
conn.commit()
def remove_all_app_rules(self, app_path):
with self._lock:
conn = self._get_conn()
c = conn.cursor()
c.execute("DELETE FROM rules WHERE app_path=?", (app_path,))
conn.commit()

182
opensnitch/snitch.py
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@ -1,182 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from concurrent.futures import Future, TimeoutError
from netfilterqueue import NetfilterQueue
from threading import Lock
from scapy.all import IP
import threading
import logging
import weakref
from opensnitch.connection import Connection
from opensnitch.dns import DNSCollector
from opensnitch.rule import RuleVerdict, Rules
from opensnitch.procmon import ProcMon
from opensnitch.iptables import IPTCRules
from opensnitch.dbus_service import OpensnitchService
MARK_PACKET_DROP = 101285
PACKET_TIMEOUT = 30 # 30 seconds is a good value?
IPTABLES_RULES = (
# Get DNS responses
"INPUT --protocol udp --sport 53 -j NFQUEUE --queue-num 0 --queue-bypass",
# Get connection packets
"OUTPUT -t mangle -m conntrack --ctstate NEW -j NFQUEUE --queue-num 0 --queue-bypass", # noqa
# Reject packets marked by OpenSnitch
"OUTPUT --protocol tcp -m mark --mark 101285 -j REJECT")
def drop_packet(pkt, conn):
logging.info('Dropping %s from "%s %s"',
conn, conn.app.path, conn.app.cmdline)
pkt.set_mark(MARK_PACKET_DROP)
pkt.drop()
class NetfilterQueueWrapper(threading.Thread):
def __init__(self, snitch):
super().__init__()
self.snitch = snitch
self.handlers = weakref.WeakValueDictionary()
self.latest_packet_id = 0
self._q = None
self.start()
def stop(self):
if self._q is not None:
self._q.unbind()
def pkt_callback(self, pkt):
try:
data = pkt.get_payload()
if self.snitch.dns.add_response(IP(data)):
pkt.accept()
return
self.latest_packet_id += 1
conn = Connection(self.snitch.procmon, self.snitch.dns,
self.latest_packet_id, data)
if conn.proto is None:
logging.debug("Could not detect protocol for packet.")
return
# Get verdict, if verdict cannot be found prompt user in thread
verd = self.snitch.rules.get_verdict(conn)
if verd is None:
handler = PacketHandler(conn, pkt, self.snitch.rules)
self.handlers[conn.id] = handler
self.snitch.dbus_service.prompt(
conn.id,
conn.hostname,
conn.dst_port or 0,
conn.dst_addr,
conn.proto,
conn.app.pid or 0,
conn.app.path or '',
conn.app.cmdline or '')
elif RuleVerdict(verd) == RuleVerdict.DROP:
drop_packet(pkt, conn)
elif RuleVerdict(verd) == RuleVerdict.ACCEPT:
pkt.accept()
else:
raise RuntimeError("Unhandled state")
except Exception as e:
logging.exception("Exception on packet callback:")
logging.exception(e)
def run(self):
try:
self._q = q = NetfilterQueue()
q.bind(0, self.pkt_callback, 1024 * 2)
q.run()
finally:
if q is not None:
q.unbind()
class PacketHandler(threading.Thread):
"""Handle a packet asynchronously in a thread"""
def __init__(self, connection, pkt, rules):
super().__init__()
self.future = Future()
self.future.set_running_or_notify_cancel()
self.conn = connection
self.pkt = pkt
self.rules = rules
self.start()
def run(self):
try:
(save_option,
verdict,
apply_for_all) = self.future.result(PACKET_TIMEOUT)
except TimeoutError:
# What to do on timeouts?
# Should we even have timeouts?
self.pkt.accept()
else:
if RuleVerdict(verdict) == RuleVerdict.DROP:
drop_packet(self.pkt, self.conn)
else:
self.pkt.accept()
class Snitch:
# TODO: Support IPv6!
def __init__(self, database):
self.lock = Lock()
self.rules = Rules(database)
self.dns = DNSCollector()
self.q = NetfilterQueueWrapper(self)
self.procmon = ProcMon()
self.iptcrules = None
self.dbus_service = OpensnitchService(
self.q.handlers, self.rules)
def start(self):
if ProcMon.is_ftrace_available():
self.procmon.enable()
self.procmon.start()
self.iptcrules = IPTCRules()
self.dbus_service.run()
def stop(self):
self.procmon.disable()
self.q.stop()
if self.iptcrules is not None:
self.iptcrules.remove()

21
opensnitch/ui/__init__.py
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@ -1,21 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
__all__ = ('QtApp',)
from .app import QtApp

46
opensnitch/ui/app.py
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@ -1,46 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from PyQt5 import QtWidgets
import queue
import sys
import os
from .desktop_parser import LinuxDesktopParser
from .dialog import Dialog
from .dbus import DBusHandler
# TODO: Implement tray icon and menu.
# TODO: Implement rules editor.
RESOURCES_PATH = "%s/resources/" % os.path.dirname(
sys.modules[__name__].__file__)
DIALOG_UI_PATH = "%s/dialog.ui" % RESOURCES_PATH
class QtApp:
def __init__(self):
self.desktop_parser = LinuxDesktopParser()
self.app = QtWidgets.QApplication([])
self.connection_queue = queue.Queue()
self.dialog = Dialog(self, self.desktop_parser)
self.dbus_handler = DBusHandler(self.app, self)
def run(self):
self.app.exec()

70
opensnitch/ui/dbus.py
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@ -1,70 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Adam Hose
# adis@blad.is
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from collections import namedtuple
from PyQt5 import QtCore, QtDBus
import logging
UIConnection = namedtuple('UIConnection', (
'id',
'hostname',
'dst_port',
'dst_addr',
'proto',
'app_pid',
'app_path',
'app_cmdline',
))
class DBusHandler(QtCore.QObject):
def __init__(self, app, parent):
self.parent = parent
self.app = app
super().__init__(app)
self.__dbus = QtDBus.QDBusConnection.sessionBus()
self.__dbus.registerObject('/', self)
self.interface = QtDBus.QDBusInterface(
'io.opensnitch.service',
'/',
'io.opensnitch.service',
self.__dbus)
if not self.interface.isValid():
raise RuntimeError('Could not connect to dbus')
logging.info('Connected to dbus service')
sig_connect = self.__dbus.connect(
'io.opensnitch.service',
'/',
'io.opensnitch.service',
'prompt',
self.prompt_user)
if not sig_connect:
raise RuntimeError('Could not connect dbus signal')
logging.info('Connected dbus signal')
@QtCore.pyqtSlot(QtDBus.QDBusMessage)
def prompt_user(self, msg):
args = msg.arguments()
connection = UIConnection(*args)
self.parent.connection_queue.put(connection)
self.parent.dialog.add_connection_signal.emit()

94
opensnitch/ui/desktop_parser.py
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@ -1,94 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from threading import Lock
import configparser
import pyinotify
import threading
import glob
import os
DESKTOP_PATHS = tuple([
os.path.join(d, 'applications')
for d in os.getenv('XDG_DATA_DIRS', '/usr/share/').split(':')
])
class LinuxDesktopParser(threading.Thread):
def __init__(self):
super().__init__()
self.lock = Lock()
self.daemon = True
self.running = False
self.apps = {}
for desktop_path in DESKTOP_PATHS:
if not os.path.exists(desktop_path):
continue
for desktop_file in glob.glob(os.path.join(desktop_path,
'*.desktop')):
self.populate_app(desktop_file)
self.start()
def populate_app(self, desktop_path):
parser = configparser.ConfigParser(
strict=False) # Allow duplicate config entries
parser.read(desktop_path, 'utf8')
cmd = parser.get('Desktop Entry', 'exec', raw=True,
fallback=' ').split(' ')[0] or None
if cmd is None:
return
icon = parser.get('Desktop Entry', 'icon',
raw=True, fallback=None)
name = parser.get('Desktop Entry', 'name',
raw=True, fallback=None)
with self.lock:
self.apps[cmd] = (name, icon, desktop_path)
def get_info_by_path(self, path):
path = os.path.basename(path)
return self.apps.get(path, (path, None))[:2]
def run(self):
self.running = True
wm = pyinotify.WatchManager()
notifier = pyinotify.Notifier(wm)
def inotify_callback(event):
if event.mask == pyinotify.IN_CLOSE_WRITE:
self.populate_app(event.pathname)
elif event.mask == pyinotify.IN_DELETE:
with self.lock:
for cmd, data in self.apps.items():
if data[2] == event.pathname:
del self.apps[cmd]
break
for p in DESKTOP_PATHS:
if os.path.exists(p):
wm.add_watch(p,
pyinotify.IN_CLOSE_WRITE | pyinotify.IN_DELETE,
inotify_callback)
notifier.loop()

214
opensnitch/ui/dialog.py
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@ -1,214 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from opensnitch.rule import RuleVerdict, RuleSaveOption
from PyQt5 import QtCore, QtGui, uic, QtWidgets
from PyQt5 import QtDBus
import threading
import logging
import queue
import sys
import os
from opensnitch.ui import helpers
# TODO: Implement tray icon and menu.
# TODO: Implement rules editor.
RESOURCES_PATH = "%s/resources/" % os.path.dirname(
sys.modules[__name__].__file__)
DIALOG_UI_PATH = "%s/dialog.ui" % RESOURCES_PATH
class Dialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):
DEFAULT_RESULT = (RuleSaveOption.ONCE, RuleVerdict.ACCEPT, False)
MESSAGE_TEMPLATE = "<b>%s</b> (pid=%s) wants to connect to <b>%s</b> on <b>%s port %s%s</b>" # noqa
add_connection_signal = QtCore.pyqtSignal()
def __init__(self, app, desktop_parser, parent=None):
self.connection = None
QtWidgets.QDialog.__init__(self, parent,
QtCore.Qt.WindowStaysOnTopHint)
self.setupUi(self)
self.init_widgets()
self.start_listeners()
self.connection_queue = app.connection_queue
self.add_connection_signal.connect(self.handle_connection)
self.app = app
self.desktop_parser = desktop_parser
self.rule_lock = threading.Lock()
@QtCore.pyqtSlot()
def handle_connection(self):
# This method will get called again after the user took action
# on the currently handled connection
if self.connection is not None:
return
try:
connection = self.connection_queue.get_nowait()
except queue.Empty:
return
# Check if process is still alive, if not we dont need to handle
if connection.app_pid:
try:
os.kill(connection.app_pid, 0)
except ProcessLookupError:
return
# Re-check in case permanent rule was added since connection was queued
verd = False
with self.rule_lock:
msg = self.app.dbus_handler.interface.call(
'connection_recheck_verdict', connection.id)
reply = QtDBus.QDBusReply(msg)
if reply.isValid() and reply.value():
verd = True
elif not reply.isValid():
logging.error(msg.arguments()[0])
# Lock needs to be released before callback can be triggered
if verd:
return self.add_connection_signal.emit()
self.connection = connection
if connection.app_path is not None:
app_name, app_icon = self.desktop_parser.get_info_by_path(
connection.app_path)
else:
app_name = 'Unknown'
app_icon = None
self.setup_labels(app_name)
self.setup_icon(app_icon)
self.setup_extra()
self.result = Dialog.DEFAULT_RESULT
self.action_combo_box.setCurrentIndex(0)
self.show()
def trigger_handle_connection(self):
return self.add_connection_signal.emit()
def setup_labels(self, app_name):
self.app_name_label.setText(app_name or 'Unknown')
message = self.MESSAGE_TEMPLATE % (
helpers.get_app_name_and_cmdline(self.connection),
self.connection.app_pid or 'Unknown',
self.connection.hostname,
self.connection.proto.upper(),
self.connection.dst_port,
helpers.get_service(self.connection))
self.message_label.setText(message)
def init_widgets(self):
self.app_name_label = self.findChild(QtWidgets.QLabel,
"appNameLabel")
self.message_label = self.findChild(QtWidgets.QLabel,
"messageLabel")
self.action_combo_box = self.findChild(QtWidgets.QComboBox,
"actionComboBox")
self.allow_button = self.findChild(QtWidgets.QPushButton,
"allowButton")
self.deny_button = self.findChild(QtWidgets.QPushButton,
"denyButton")
self.whitelist_button = self.findChild(QtWidgets.QPushButton,
"whitelistButton")
self.block_button = self.findChild(QtWidgets.QPushButton,
"blockButton")
self.icon_label = self.findChild(QtWidgets.QLabel, "iconLabel")
def start_listeners(self):
self.allow_button.clicked.connect(self._allow_action)
self.deny_button.clicked.connect(self._deny_action)
self.whitelist_button.clicked.connect(self._whitelist_action)
self.block_button.clicked.connect(self._block_action)
self.action_combo_box.currentIndexChanged[str].connect(
self._action_changed)
def setup_icon(self, app_icon):
if app_icon is None:
return
icon = QtGui.QIcon().fromTheme(app_icon)
pixmap = icon.pixmap(icon.actualSize(QtCore.QSize(48, 48)))
self.icon_label.setPixmap(pixmap)
def setup_extra(self):
self._action_changed()
def _action_changed(self):
s_option = self.action_combo_box.currentText()
if s_option == "Until Quit" or s_option == "Forever":
self.whitelist_button.show()
self.block_button.show()
elif s_option == "Once":
self.whitelist_button.hide()
self.block_button.hide()
def _allow_action(self):
self._action(RuleVerdict.ACCEPT, False)
def _deny_action(self):
self._action(RuleVerdict.DROP, False)
def _whitelist_action(self):
self._action(RuleVerdict.ACCEPT, True)
def _block_action(self):
self._action(RuleVerdict.DROP, True)
def set_conn_result(self, connection_id, save_option,
verdict, apply_to_all):
msg = self.app.dbus_handler.interface.call(
'connection_set_result',
connection_id,
RuleSaveOption(save_option).value,
RuleVerdict(verdict).value,
apply_to_all)
reply = QtDBus.QDBusReply(msg)
if not reply.isValid():
logging.info(
'Could not apply result to connection "%s"', connection_id)
logging.error(msg.arguments()[0])
def _action(self, verdict, apply_to_all=False):
with self.rule_lock:
s_option = self.action_combo_box.currentText()
if s_option == "Once":
option = RuleSaveOption.ONCE
elif s_option == "Until Quit":
option = RuleSaveOption.UNTIL_QUIT
elif s_option == "Forever":
option = RuleSaveOption.FOREVER
self.set_conn_result(self.connection.id, option,
verdict, apply_to_all)
# Check if we have any unhandled connections on the queue
self.connection = None # Indicate next connection can be handled
self.hide()
return self.add_connection_signal.emit()

45
opensnitch/ui/helpers.py
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@ -1,45 +0,0 @@
# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from socket import getservbyport
def get_service(conn):
dst_port = conn.dst_port
proto = conn.proto
try:
return ' ({}) '.format(getservbyport(int(dst_port), proto))
except:
return ''
def get_app_name_and_cmdline(conn):
if conn.proto == 'icmp':
return 'Unknown'
if conn.app_cmdline is not None:
# TODO: Figure out why we get mixed types here
cmdline = conn.app_cmdline if isinstance(conn.app_cmdline, str) else conn.app_cmdline.decode() # noqa
path = conn.app_path if isinstance(conn.app_path, str) else conn.app.path_decode() # noqa
if cmdline.startswith(conn.app_path):
return cmdline
else:
return "%s %s" % (path, cmdline)
else:
return conn.app_path

0
opensnitch/ui/resources/__init__.py
View file

243
opensnitch/ui/resources/dialog.ui
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@ -1,243 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Dialog</class>
<widget class="QDialog" name="Dialog">
<property name="windowModality">
<enum>Qt::NonModal</enum>
</property>
<property name="enabled">
<bool>true</bool>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>430</width>
<height>169</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="MinimumExpanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>430</width>
<height>160</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>680</width>
<height>250</height>
</size>
</property>
<property name="sizeIncrement">
<size>
<width>35</width>
<height>9</height>
</size>
</property>
<property name="font">
<font>
<kerning>true</kerning>
</font>
</property>
<property name="windowTitle">
<string>OpenSnitch</string>
</property>
<property name="sizeGripEnabled">
<bool>false</bool>
</property>
<property name="modal">
<bool>false</bool>
</property>
<layout class="QGridLayout" name="gridLayout">
<property name="sizeConstraint">
<enum>QLayout::SetMinAndMaxSize</enum>
</property>
<item row="3" column="1">
<spacer name="horizontalSpacer">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
<item row="5" column="0">
<widget class="QPushButton" name="whitelistButton">
<property name="text">
<string>Whitelist app</string>
</property>
</widget>
</item>
<item row="0" column="5">
<widget class="QLabel" name="iconLabel">
<property name="text">
<string/>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="5" column="1" colspan="2">
<widget class="QPushButton" name="blockButton">
<property name="text">
<string>Block app</string>
</property>
</widget>
</item>
<item row="5" column="3">
<widget class="QPushButton" name="denyButton">
<property name="text">
<string>Deny</string>
</property>
</widget>
</item>
<item row="5" column="4" colspan="2">
<widget class="QPushButton" name="allowButton">
<property name="font">
<font>
<strikeout>false</strikeout>
</font>
</property>
<property name="mouseTracking">
<bool>false</bool>
</property>
<property name="text">
<string>Allow</string>
</property>
<property name="default">
<bool>true</bool>
</property>
</widget>
</item>
<item row="3" column="2">
<widget class="QComboBox" name="actionComboBox">
<property name="minimumSize">
<size>
<width>97</width>
<height>26</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>97</width>
<height>26</height>
</size>
</property>
<item>
<property name="text">
<string>Once</string>
</property>
</item>
<item>
<property name="text">
<string>Until Quit</string>
</property>
</item>
<item>
<property name="text">
<string>Forever</string>
</property>
</item>
</widget>
</item>
<item row="3" column="0">
<widget class="QLabel" name="actionLabel">
<property name="text">
<string>Take this action:</string>
</property>
</widget>
</item>
<item row="0" column="0" colspan="5">
<widget class="QLabel" name="appNameLabel">
<property name="font">
<font>
<pointsize>15</pointsize>
<weight>75</weight>
<bold>true</bold>
</font>
</property>
<property name="text">
<string>Chromium Web Browser</string>
</property>
</widget>
</item>
<item row="1" column="0" colspan="6">
<widget class="QLabel" name="messageLabel">
<property name="enabled">
<bool>true</bool>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>0</width>
<height>0</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>600</width>
<height>400</height>
</size>
</property>
<property name="sizeIncrement">
<size>
<width>35</width>
<height>18</height>
</size>
</property>
<property name="contextMenuPolicy">
<enum>Qt::ActionsContextMenu</enum>
</property>
<property name="frameShape">
<enum>QFrame::StyledPanel</enum>
</property>
<property name="frameShadow">
<enum>QFrame::Raised</enum>
</property>
<property name="text">
<string>Chromium Web Browser (/usr/lib/chromium-browser) wants to connect to host 127.0.0.1 on TCP port 443 (https)</string>
</property>
<property name="textFormat">
<enum>Qt::RichText</enum>
</property>
<property name="scaledContents">
<bool>true</bool>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
</property>
<property name="wordWrap">
<bool>true</bool>
</property>
<property name="margin">
<number>1</number>
</property>
<property name="indent">
<number>1</number>
</property>
<property name="textInteractionFlags">
<set>Qt::TextBrowserInteraction</set>
</property>
</widget>
</item>
</layout>
</widget>
<resources/>
<connections/>
</ui>

229
opensnitch/ui/resources/dialog_hi.ui
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@ -1,229 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Dialog</class>
<widget class="QDialog" name="Dialog">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>710</width>
<height>316</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
<horstretch>37</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>490</width>
<height>220</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>1000</width>
<height>400</height>
</size>
</property>
<property name="font">
<font>
<kerning>true</kerning>
</font>
</property>
<property name="windowTitle">
<string>OpenSnitch</string>
</property>
<widget class="QLabel" name="appNameLabel">
<property name="geometry">
<rect>
<x>20</x>
<y>20</y>
<width>433</width>
<height>42</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>15</pointsize>
<weight>75</weight>
<bold>true</bold>
</font>
</property>
<property name="text">
<string>Chromium Web Browser</string>
</property>
</widget>
<widget class="Line" name="line">
<property name="geometry">
<rect>
<x>0</x>
<y>60</y>
<width>711</width>
<height>16</height>
</rect>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
<widget class="QLabel" name="messageLabel">
<property name="geometry">
<rect>
<x>20</x>
<y>90</y>
<width>661</width>
<height>81</height>
</rect>
</property>
<property name="text">
<string>Chromium Web Browser (/usr/lib/chromium-browser) wants to connect to host 127.0.0.1 on TCP port 443 (https)</string>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
</property>
<property name="wordWrap">
<bool>true</bool>
</property>
</widget>
<widget class="QPushButton" name="whitelistButton">
<property name="geometry">
<rect>
<x>20</x>
<y>240</y>
<width>160</width>
<height>50</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="text">
<string>Whitelist app</string>
</property>
</widget>
<widget class="QPushButton" name="blockButton">
<property name="geometry">
<rect>
<x>190</x>
<y>240</y>
<width>160</width>
<height>50</height>
</rect>
</property>
<property name="text">
<string>Block app</string>
</property>
</widget>
<widget class="QPushButton" name="denyButton">
<property name="geometry">
<rect>
<x>360</x>
<y>240</y>
<width>160</width>
<height>50</height>
</rect>
</property>
<property name="text">
<string>Deny</string>
</property>
</widget>
<widget class="QPushButton" name="allowButton">
<property name="geometry">
<rect>
<x>530</x>
<y>240</y>
<width>160</width>
<height>50</height>
</rect>
</property>
<property name="font">
<font>
<strikeout>false</strikeout>
</font>
</property>
<property name="mouseTracking">
<bool>false</bool>
</property>
<property name="text">
<string>Allow</string>
</property>
<property name="default">
<bool>true</bool>
</property>
</widget>
<widget class="QComboBox" name="actionComboBox">
<property name="geometry">
<rect>
<x>190</x>
<y>190</y>
<width>160</width>
<height>35</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>97</width>
<height>26</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>204</width>
<height>50</height>
</size>
</property>
<item>
<property name="text">
<string>Once</string>
</property>
</item>
<item>
<property name="text">
<string>Until Quit</string>
</property>
</item>
<item>
<property name="text">
<string>Forever</string>
</property>
</item>
</widget>
<widget class="QLabel" name="actionLabel">
<property name="geometry">
<rect>
<x>20</x>
<y>190</y>
<width>161</width>
<height>31</height>
</rect>
</property>
<property name="text">
<string>Take this action:</string>
</property>
</widget>
<widget class="QLabel" name="iconLabel">
<property name="geometry">
<rect>
<x>640</x>
<y>5</y>
<width>60</width>
<height>60</height>
</rect>
</property>
<property name="text">
<string/>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</widget>
<resources/>
<connections/>
</ui>

19
opensnitch/version.py
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# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
VERSION = '0.0.2'

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56
setup.py
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# This file is part of OpenSnitch.
#
# Copyright(c) 2017 Simone Margaritelli
# evilsocket@gmail.com
# http://www.evilsocket.net
#
# This file may be licensed under the terms of of the
# GNU General Public License Version 2 (the ``GPL'').
#
# Software distributed under the License is distributed
# on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
# express or implied. See the GPL for the specific language
# governing rights and limitations.
#
# You should have received a copy of the GPL along with this
# program. If not, go to http://www.gnu.org/licenses/gpl.html
# or write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from setuptools import setup, find_packages
from opensnitch.version import VERSION
import sys
if sys.version_info[0] != 3:
raise RuntimeError('Unsupported python version "{0}"'.format(
sys.version_info[0]))
try:
with open('README.md') as f:
long_description = f.read()
except:
long_description = 'OpenSnitch - An application level firewall for GNU/Linux.' # noqa
setup(name='opensnitch',
version=VERSION,
description=long_description,
long_description=long_description,
author='Simone Margaritelli',
author_email='evilsocket@gmail.com',
url='http://www.github.com/evilsocket/opensnitch',
packages=find_packages(),
scripts=['bin/opensnitchd', 'bin/opensnitch-qt'],
package_data={'': ['*.ui']},
license='GPL',
zip_safe=False,
install_requires=[
'scapy-python3',
'dpkt',
'NetfilterQueue',
'psutil',
'pyinotify',
'python-iptables',
'python-prctl',
'pygobject',
])